Patent Publication Number: US-2021188115-A1

Title: Battery information providing device , battery information providing system, battery information providing method, and recording medium

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     Priority is claimed on Japanese Patent Application No. 2019-231884, filed Dec. 23, 2019, the content of which is incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a battery information providing device, a battery information providing system, a battery information providing method, and a recording medium. 
     Description of Related Art 
     In recent years, development of a vehicle that travels using an electric motor driven by electric power supplied from at least a battery (a secondary battery), for example, an electric vehicle (EV: an electric automobile), a hybrid electric vehicle (HEV: a hybrid electric automobile), or the like, has been in progress. 
     In the related art, a technology of supplying electric power stored in a battery mounted in a vehicle to another device is disclosed (for example, see Japanese Unexamined Patent Application, First Publication No. 2005-137034 and Japanese Unexamined Patent Application, First Publication No. 2013-099124). In addition, a technology of monitoring a state of a battery mounted in a vehicle is disclosed (for example, see Japanese Unexamined Patent Application, First Publication No. 2010-126126). 
     SUMMARY OF THE INVENTION 
     When the electric power stored in a battery mounted in a vehicle is supplied to another device, in order to prevent hindrance in traveling or the like of the vehicle, for example, it is important to ascertain a state of the battery such as a capacity or the like with respect to the electric power able to be stored in the battery. However, in the technology in the related art, sufficient consideration has not been given to ascertaining the state of the battery after supply of power to another device, or the like. 
     An aspect of the present invention is directed to providing a battery information providing device, a battery information providing system, a battery information providing method, and a recording medium in which a state of a battery after supply of electric power stored in the battery mounted in a vehicle to another device is able to be ascertained. 
     A battery information providing device, a battery information providing system, a battery information providing method, and a recording medium according to the present invention employ the following configurations. 
     (1) A battery information providing device according to an aspect of the present invention includes an acquisition part configured to acquire a battery charging rate of a battery, which is mounted on a vehicle and which stores electric power for traveling the vehicle, and device battery information related to a device battery which is included in a device, which is an object to which the electric power is supplied, connected to the vehicle; and an estimation part configured to estimate a state of the battery after the electric power stored in the battery has been supplied to the device battery on the basis of the battery charging rate and the device battery information, and configured to output battery-related information related to the estimated state of the battery to an information output part. 
     (2) In the aspect of the above-mentioned (1), the estimation part may estimate a battery charging rate of the battery after the electric power has been supplied to the device battery as the state of the battery. 
     (3) In the aspect of the above-mentioned (1) or (2), the estimation part may output a traveling distance, which is a distance over which the vehicle is able to travel after the electric power has been supplied to the device battery, to the information output part as the battery-related information. 
     (4) In the aspect of any one of the above-mentioned (1) to (3), the estimation part may output a usable time, which is a time length in which an in-vehicle device included in the vehicle is usable after the electric power has been supplied to the device battery, to the information output part as the battery-related information. 
     (5) In the aspect of any one of the above-mentioned (1) to (4), the estimation part may output an electric power suppliable time, which is a time length over which the electric power stored in the battery is able to be supplied to an outside of the vehicle after the electric power has been supplied to the device battery, to the information output part as the battery-related information. 
     (6) In the aspect of any one of the above-mentioned (1) to (5), the acquisition part may acquire information related to a capacity of the device battery as the device battery information. 
     (7) In the aspect of the above-mentioned (6), the acquisition part may acquire information related to a battery charging rate of the device battery as the device battery information. 
     (8) In the aspect of the above-mentioned (6) or (7), the acquisition part may acquire information related to a deterioration state of the device battery as the device battery information. 
     (9) In the aspect of any one of the above-mentioned (1) to (8), the acquisition part may acquire the device battery information that has been input to the information input part. 
     (10) In the aspect of any one of the above-mentioned (1) to (8), the acquisition part may acquire the device battery information which has been transmitted from a battery management server device that is configured to manage a usage of the battery in the vehicle. 
     (11) In the aspect of any one of (1) to (8), the acquisition part may acquire the device battery information transmitted from the device which is the object to be supplied with the electric power. 
     (12) In the aspect of any one of the above-mentioned (1) to (8), the acquisition part may acquire the device battery information transmitted from a device management server device configured to manage the device battery information transmitted from the device which is the object to be supplied with the electric power. 
     (13) In addition, a battery information providing system according to an aspect of the present invention includes the battery information providing device according to the aspect of any one of the above-mentioned (1) to (9), and a battery management server device configured to manage a usage of the battery in the vehicle, wherein the battery management server device transmits the acquired device battery information to the battery information providing device, and the battery information providing device estimates a state of the battery after the electric power stored in the battery has been supplied to the device battery on the basis of the battery charging rate and the device battery information transmitted from the battery management server device, and outputs the battery-related information related to the estimated state of the battery to the information output part. 
     (14) In the aspect of the above-mentioned (13), the battery management server device may transmit the device battery information, which is acquired from the device management server device configured to manage the device battery information transmitted from the device which is the object to be supplied with the electric power, to the battery information providing device. 
     (15) In addition, a battery information providing method according to an aspect of the present invention, which is performed by a computer, includes acquiring a battery charging rate of a battery, which is mounted on a vehicle and which stores electric power for traveling the vehicle, and device battery information related to a device battery which is included in a device, which is an object to which the electric power is supplied, connected to the vehicle; estimating a state of the battery after the electric power stored in the battery has been supplied to the device battery on the basis of the battery charging rate and the device battery information; and outputting battery-related information related to the estimated state of the battery to an information output part. 
     (16) In addition, there is a recording medium according to an aspect of the present invention, on which a program is stored to cause a computer to: acquire a battery charging rate of a battery, which is mounted on a vehicle and which stores electric power for traveling the vehicle, and device battery information related to a device battery which is included in a device, which is an object to which the electric power is supplied, connected to the vehicle; estimate a state of the battery after the electric power stored in the battery has been supplied to the device battery on the basis of the battery charging rate and the device battery information; and output battery-related information related to the estimated state of the battery to an information output part. 
     According to the aspects of the above-mentioned (1) to (16), it is possible to perceive a state of a battery after electric power stored in the battery mounted in the vehicle has been supplied to another device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view showing an example of a configuration of a vehicle in which a battery information providing device according to a first embodiment is adopted. 
         FIG. 2  is a view showing an example of a configuration and a use environment of the battery information providing device according to the first embodiment. 
         FIG. 3  is a view showing an example of a screen that provides battery-related information estimated by the battery information providing device. 
         FIG. 4  is a flowchart showing an example of a flow of processing executed by the battery information providing device. 
         FIG. 5  is a view showing an example of a configuration and a use environment of a battery information providing system according to a second embodiment. 
         FIG. 6  is a sequential diagram showing an example of the entire flow of the processing executed by the battery information providing system. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Hereinafter, embodiments of a battery information providing device, a battery information providing system, a battery information providing method, and a program of the present invention will be described with reference to the accompanying drawings. In the following description, an example of the case in which the battery information providing device of the present invention is employed in an electric automobile (EV) (hereinafter, simply referred to as “a vehicle”) will be described. 
     First Embodiment 
     [Configuration of Vehicle in which Battery Information Providing Device is Employed] 
       FIG. 1  is a view showing an example of a configuration of a vehicle  10  in which a battery information providing device  100  according to a first embodiment is employed. The vehicle  10  shown in  FIG. 1  is a battery electric vehicle (BEV: an electric automobile) that travels using an electric motor driven by electric power supplied from a battery (a secondary battery) for traveling. Further, the vehicle  10  includes, in addition to a four-wheeled vehicle, for example, a saddle type two-wheeled vehicle, or a three-wheeled vehicle (including a two-front-wheeled and one-rear-wheeled vehicle in addition to a one-front-wheeled and two-rear-wheeled vehicle), and further, all vehicles that travel through an operation of an internal combustion engine or an electric motor driven by electric power supplied from a battery, for example, an assist type bicycle or the like. 
     The vehicle  10  shown in  FIG. 1  includes, for example, a motor  12 , a driving wheel  14 , a brake apparatus  16 , a vehicle sensor  20 , a power control unit (PCU)  30 , a battery  40  for traveling, a battery sensor  42  such as a voltage sensor, a current sensor, a temperature sensor, and the like, a communication device  50 , a human machine interface (HMI)  60  including a display device, a charging port  70 , a connecting circuit  72 , a power feeding port  80 , a conversion circuit  82 , and the battery information providing device  100 . 
     The motor  12  is, for example, a 3-phase alternating current electric motor. A rotator (a rotor) of the motor  12  is connected to the driving wheel  14 . The motor  12  is driven by electric power supplied from a power storage part (not shown) included in the battery  40  for traveling, and a rotating force is transmitted to the driving wheel  14 . In addition, the motor  12  generates power using kinetic energy of the vehicle  10  upon deceleration of the vehicle  10 . 
     The brake apparatus  16  may include, for example, a brake caliper, a cylinder configured to transmit a hydraulic pressure to the brake caliper and an electric motor configured to generate a hydraulic pressure in the cylinder. The brake apparatus  16  may include a mechanism configured to transmit the hydraulic pressure generated by an operation by a user (a driver) of the vehicle  10  with respect to a brake pedal (not shown) to the cylinder via a master cylinder as a backup. Further, the brake apparatus  16  is not limited to the above-mentioned configuration, and may be an electronically controlled hydraulic brake apparatus configured to transmit a hydraulic pressure of a master cylinder to a cylinder. 
     The vehicle sensor  20  includes, for example, an accelerator position sensor, a vehicle speed sensor, and a brake depression amount sensor. The accelerator position sensor is attached to an accelerator pedal, detects an amount of operation of the accelerator pedal by a driver, and outputs the detected operation amount to a controller  36  included in the PCU  30  as an accelerator position. The vehicle speed sensor includes, for example, wheel speed sensors attached to wheels of the vehicle  10  and a speed calculator, derives a speed of the vehicle  10  (a vehicle speed) by combining the wheel speeds detected by the wheel speed sensors, and outputs the derived speed to the controller  36  and the HMI  60 . The brake pedaling sensor is attached to the brake pedal, detects an amount of operation of the brake pedal by the driver, and outputs the detected operation amount to the controller  36  as a brake depression amount. 
     The PCU  30  includes, for example, a converter  32 , a voltage control unit (VCU)  34 , and the controller  36 . Further, in  FIG. 1 , the configuration in which these components are grouped together as the PCU  30  is just an example, and those components in the vehicle  10  may be arranged in a distributed manner. 
     The converter  32  is, for example, an AC-DC converter. A DC-side terminal of the converter  32  is connected to a DC link DL. The battery  40  for traveling is connected to the DC link DL via the VCU  34 . The converter  32  converts alternating current generated by the motor  12  into direct current, and outputs the converted direct current to the DC link DL. 
     The VCU  34  is, for example, a DC-DC converter. The VCU  34  boosts electric power supplied from the battery  40  for traveling, and outputs the boosted electric power to the DC link DL. 
     The controller  36  includes, for example, a motor controller, a brake controller, a battery/VCU controller, and an electric power feeding controller. The motor controller, the brake controller, the battery/VCU controller, and the electric power feeding controller may be replaced with separate control devices, for example, control devices referred to as a motor electronic control unit (ECU) , a brake ECU, a battery ECU, and an electric power feeding control ECU. 
     In addition, the controller  36 , or the motor controller, the brake controller, the battery/VCU, the controller and the electric power feeding controller that are included in the controller  36  are realized by executing a program (software) using a hardware processor such as a central processing unit (CPU) or the like. In addition, some or all of these components may be realized by hardware (a circuit part; including circuitry) such as a large scale integration (LSI), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a graphics processing unit (GPU), or the like, or may be realized by cooperation of software and hardware. In addition, some or all of functions of these components may be realized by a dedicated LSI. The program may have been previously stored in a storage device such as a hard disk drive (HDD), a flash memory, or the like, included in the vehicle  10  (a storage device including a non-transient recording medium), or may be stored in a detachable recording medium (a non-transient recording medium) such as a DVD, a CD-ROM, or the like, and installed on an HDD or flash memory included in the vehicle  10  by a recording medium being mounted on a drive device included in the vehicle  10 . 
     The motor controller of the controller  36  controls driving of the motor  12  on the basis of the output from the accelerator position sensor included in the vehicle sensor  20 . The brake controller of the controller  36  controls the brake apparatus  16  on the basis of the output from the brake pedaling sensor included in the vehicle sensor  20 . The battery/VCU controller of the controller  36  calculates, for example, a state of charge (SOC; hereinafter, referred to as “a battery charging rate”) of the battery  40  for traveling on the basis of the output from the battery sensor  42  connected to the battery  40  for traveling, and outputs the SOC to the VCU  34 , the HMI  60 , and the battery information providing device  100 . The controller  36  may output information of the vehicle speed output from the vehicle sensor  20  to the HMI  60 . The VCU  34  increases a voltage of the DC link DL according to an instruction from the battery/VCU controller. 
     The electric power feeding controller of the controller  36  performs control when electric power stored in the battery  40  for traveling is supplied as electric power to charge, for example, a battery included in another device (hereinafter, referred to as “a device battery”) connected to the vehicle  10 . The other device is a terminal device such as a smartphone, a tablet terminal, or the like, held by, for example, a user in the vehicle  10  (an occupant such as a driver or the like). In addition, the other device may be an apparatus or a device such as a laptop computer (what is called a notebook PC), a portable external battery (an apparatus, what is called, a portable power supply device), or the like. Further, the other device may be another vehicle different from the vehicle  10 . 
     The battery  40  for traveling is a secondary battery capable of repeating charging and discharge, for example, a lithium ion battery or the like. As the secondary battery that constitutes the battery  40  for traveling, in addition to a lead storage battery, a nickel hydride battery, a sodium ion battery, or the like, for example, a capacitor such as an electric dual layer capacitor or the like, a compound battery obtained by combining a secondary battery and capacitor, or the like, are also conceivable. Further, in the present invention, the configuration of the secondary battery in the battery  40  for traveling is not particularly defined. In addition, the battery  40  for traveling may be, for example, a cassette type battery pack or the like detachably mounted in the vehicle  10 . The battery  40  for traveling stores electric power introduced from a charger  500  outside the vehicle  10 , and performs discharge for traveling of the vehicle  10 . 
     The battery sensor  42  detects a physical quantity such as a current, a voltage, a temperature, or the like, of the battery  40  for traveling. The battery sensor  42  includes, for example, a current sensor, a voltage sensor, and a temperature sensor. The battery sensor  42  detects the current of the secondary battery (hereinafter, simply referred to as “the battery  40  for traveling”) that constitutes the battery  40  for traveling using the current sensor, detects the voltage of the battery  40  for traveling using the voltage sensor, and detects the temperature of the battery  40  for traveling using the temperature sensor. The battery sensor  42  outputs information such as the current value, the voltage value, the temperature, and the like, of the battery  40  for traveling, which are detected, to the controller  36  or the communication device  50 . 
     The communication device  50  includes a wireless module configured to connect to a cellular network or a Wi-Fi network. The communication device  50  may include a wireless module configured to use Bluetooth (a registered trademark) or the like. For example, the communication device  50  transmits or receives various types of information related to the vehicle  10  to/from the above-mentioned server device (hereinafter, referred to as “a battery management server device”) on the network (not shown) that manages a state of the battery  40  for traveling mounted in the vehicle  10  through communication in the wireless module. 
     The HMI  60  provides various types of information to a user of the vehicle  10 , for example, a driver or the like, and receives an input operation of the user. The HMI  60  is, for example, a so-called touch panel in which a display device such as a liquid crystal display (LCD) or the like and an input device configured to detect an input operation are combined. The HMI  60  may include various types of display parts other than the display device, a speaker, a buzzer, switches other than the input device, a key, and the like. The HMI  60  may share the display device or the input device with a display device or an input device such as, for example, an in-vehicle navigation device or the like. 
     The charging port  70  is a mechanism configured to charge the battery  40  for traveling (the secondary battery). The charging port  70  is oriented toward the outside from the vehicle body of the vehicle  10 . The charging port  70  is connected to the charger  500  via a charging cable  520 . The charging cable  520  includes a first plug  522  and a second plug  524 . The first plug  522  is connected to the charger  500 , and the second plug  524  is connected to the charging port  70 . Electricity supplied from the charger  500  is input (supplied) to the charging port  70  via the charging cable  520 . 
     In addition, the charging cable  520  includes a signal cable attached to the electric power cable. The signal cable mediates communication between the vehicle  10  and the charger  500 . Accordingly, an electric power connector configured to connect to the electric power cable and a signal connector configured to connect to the signal cable are provided on the first plug  522  and the second plug  524 . 
     The connecting circuit  72  is provided between the charging port  70  and the battery  40  for traveling. The connecting circuit  72  transmits current introduced from the charger  500  via the charging port  70 , for example, direct current as current that is supplied to the battery  40  for traveling. The connecting circuit  72  outputs, for example, the direct current to the battery  40  for traveling, and stores (charges) electric power in the battery  40  for traveling (the secondary battery). 
     The power feeding port  80  is a mechanism (a connecting terminal) configured to feed electric power stored in the battery  40  for traveling to the outside of the vehicle  10 . Another device configured to receive electric power from the battery  40  for traveling is connected to the power feeding port  80 . As the connecting terminal of the power feeding port  80 , for example, an accessory socket (what is called a cigarette lighter port) for supply of electric power, a universal serial bus (USB) terminal, or the like, installed in a passenger compartment of the vehicle  10  is conceivable. In addition, the connecting terminal of the power feeding port  80  is, for example, a socket or the like of a commercial power supply configured to operate domestic electric appliances or a personal computer. In the power feeding port  80 , a plurality of connecting terminals having the same shape or connecting terminals having different shapes may be provided. In this case, in the vehicle  10 , electric power can be supplied from the battery  40  for traveling to a plurality of other devices connected simultaneously. In addition, the power feeding port  80  may share the mechanism configured to connect to the other vehicle with the mechanism of the charging port  70 , for example, when electric power is supplied from the battery  40  for traveling to the other vehicle different from the vehicle  10 . 
     The conversion circuit  82  is provided between the power feeding port  80  and the battery  40  for traveling. The conversion circuit  82  is, for example, a DC-DC converter or a DC-AC converter. The conversion circuit  82  converts electric power (a voltage) output from the battery  40  for traveling to the outside of the vehicle  10  into electric power (a voltage) defined in a shape of each connecting terminal of the power feeding port  80 . In other words, the conversion circuit  82  converts the electric power into electric power (a voltage) that coincides with a specification of the device connected to the connecting terminal and outputs the converted electric power to the power feeding port  80 . Accordingly, for example, when the connecting terminal of the power feeding port  80  is a USB terminal, electric power can be supplied to charge the device battery included in the terminal device such as a smart phone, a tablet terminal, or the like, carried by a user (an occupant such as a driver or the like) of the vehicle  10 . In addition, for example, when the connecting terminal of the power feeding port  80  is the socket of a commercial power supply, electric power can be supplied to charge the device battery included in the apparatus or a device such as a notebook PC, a portable power supply device, or the like, carried by the user of the vehicle  10 . Further, in the conversion circuit  82 , in the case in which electric power is supplied from the battery  40  for traveling to another vehicle different from the vehicle  10 , when the mechanism of the power feeding port  80  is shared by the mechanism of the charging port  70 , the electric power (the voltage) converted into the electric power (the voltage) that coincides with the specification of the other vehicle is output to the charging port  70 . 
     The battery information providing device  100  previously (before the electric power is supplied to the device battery) calculates (estimates) the battery information related to the state of the battery  40  for traveling (hereinafter, referred to as “battery-related information”) after the electric power has been supplied to the device battery when the electric power stored in the battery  40  for traveling is supplied to the device battery. The battery-related information is, for example, the SOC of the battery  40  for traveling (a battery charging rate) after the electric power has been supplied to the device battery. In addition, the battery-related information may include details of various types related to the state of the battery  40  for traveling after the electric power has been supplied to the device battery, for example, a distance over which the vehicle  10  can travel in a state in which it has the SOC of the battery  40  for traveling after electric power has been supplied to the device battery (a traveling distance) or the like. In the following description, the battery information providing device  100  will be mainly described as calculating (estimating) the SOC of the battery  40  for traveling after the electric power has been supplied to the device battery. 
     The battery information providing device  100  or the components included in the battery information providing device  100  are realized by executing a program (software) using a hardware processor such as a CPU or the like. In addition, some or all of these components may be realized by hardware (a circuit part; including circuitry) such as an LSI, an ASIC, an FPGA, a GPU, or the like, or may be realized by cooperation of software and hardware. In addition, some or all of functions of these components may be realized by a dedicated LSI. The program may be previously stored in a storage device such as an HDD, a flash memory, or the like, included in the vehicle  10  (a storage device including a non-transient recording medium), or may be stored in a detachable recording medium (a non-transient recording medium) such as a DVD, a CD-ROM, or the like, and installed on an HDD or a flash memory included in the vehicle  10  by the recording medium being mounted on a drive device included in the vehicle  10 . 
     Further, the battery information providing device  100  may be included in (built into), for example, the PCU  30  or the controller  36 . 
     The battery information providing device  100  acquires the current SOC of the battery  40  for traveling from the controller  36  when the SOC of the battery  40  for traveling after the electric power has been supplied to the device battery is previously calculated (estimated). In addition, the battery information providing device  100  acquires battery information related to the device battery included in the other device connected to the vehicle  10  (hereinafter, referred to as “device battery information”) from the HMI  60 . The device battery information is information used when the device battery is charged, for example, a rated value such as an electric power capacity or the like of the device battery, the current SOC of the device battery, or the like. In addition, the device battery information may include information showing, for example, a deterioration state of the device battery. 
     The HMI  60  acquires the device battery information input by the operation of the input device by the user of the vehicle  10  and related to the device battery included in the other device connected to the vehicle  10 , and outputs the acquired information to the battery information providing device  100 . The user of the vehicle  10  inputs information, for example, a value such as an electric power capacity or the like written on a rated nameplate or the like attached to the device battery included in the other device, a battery residual value displayed on the display device included in the other device, or the like. In addition, for example, the user of the vehicle  10  may input the information of the electric power capacity of the device battery retrieved using the Internet. The HMI  60  is an example of “the information input part” in the claims. 
     The battery information providing device  100  calculates the SOC of the battery  40  for traveling that expresses the electric power quantity remaining after the stored electric power has been charged to the device battery (hereinafter, referred to as “the SOC after supply of the electric power”) on the basis of the current SOC acquired of the battery  40  for traveling (hereinafter, “the SOC before supply of the electric power”) and the device battery information of the device battery. The battery information providing device  100  outputs the SOC of the battery  40  for traveling after the calculated electric power has been supplied to the device battery (the SOC after supply of the electric power) to the HMI  60 , and informs (notifies) the user of the vehicle  10  such as a driver or the like of information of the SOC after supply of the electric power. 
     The HMI  60  informs (notifies) the user of the vehicle  10  of the SOC of the battery  40  for traveling after charge of the device battery included in the other device connected to the vehicle  10  by displaying the information showing the SOC after supply of the electric power output from the battery information providing device  100  on the display device. Then, when a charge instruction that instructs to charge the device battery is performed according to an operation of the input device by the user of the vehicle  10 , the HMI  60  outputs the information showing the instruction (hereinafter, referred to as “charge instruction information”) to the battery information providing device  100 . The HMI  60  is an example of “the information output part” in the claims. 
     The battery information providing device  100  adds the other device connected to the vehicle  10  to supply destinations of electric power when the charge instruction information expressing that charging of the device battery is to be performed is output by the HMI  60 . Accordingly, the controller  36  supplies electric power of the battery  40  for traveling to the device battery. 
     [Configuration of Battery Information Providing Device  100 ] 
     Next, an example of a configuration of the battery information providing device  100  will be described.  FIG. 2  is a view showing an example of a configuration and a use environment of the battery information providing device  100  according to the first embodiment. The battery information providing device  100  shown in  FIG. 2  includes, for example, an acquisition part  102  and an estimation part  104 . 
     In the example of  FIG. 2 , a terminal device such as a smartphone, a tablet terminal, or the like, carried by a user of a user terminal T (hereinafter, referred to as “a user U”) is connected to the power feeding port  80  of the vehicle  10  by a cable C. 
     The acquisition part  102  acquires the SOC before supply of the electric power output from the controller  36 . In addition, the acquisition part  102  acquires the device battery information from the HMI  60 . Here, it is assumed that at least the information of the electric power capacity of the device battery is input by the user U, and the information of the current SOC is input if possible. The acquisition part  102  outputs the SOC before supply of the electric power and the device battery information that were acquired to the estimation part  104 . 
     The estimation part  104  calculates (estimates) the SOC after supply of the electric power on the basis of the SOC before supply of the electric power and the device battery information that were output from the acquisition part  102 . The estimation part  104  calculates the SOC after supply of the electric power, for example, when the charge is performed until the state of charge of the device battery becomes a fully charged state. The estimation part  104  calculates the SOC after supply of the electric power while assuming that the current SOC of the device battery is 0 [%] when the SOC after supply of the electric power is calculated using only the information of the electric power capacity of the device battery, and the estimation part  104  calculates the SOC after supply of the electric power assuming that charging with electric power is performed to an extent of a capacity not being charged among the electric power capacity of the device battery when the information of the current SOC of the device battery is obtained. In the case of the latter, the SOC after supply of the electric power can be calculated (estimated) accurately. In addition, when the information expressing the deterioration state of the device battery is acquired as the device battery information by the acquisition part  102 , the estimation part  104  further calculates an extent of a decrease of the electric power capacity due to deterioration on the basis of the information expressing the deterioration state of the device battery, and subtracts the calculated extent of the electric power capacity from the electric power capacity of the device battery. Accordingly, the SOC after supply of the electric power can be calculated by obtaining the electric power required for the charging more accurately. 
     The estimation part  104  outputs the calculated (estimated) information of the SOC after supply of the electric power to the HMI  60  as the battery-related information, and displays the output information on the display device included in the HMI  60 . Accordingly, the user U can check the SOC displayed on the display device included in the HMI  60  after supply of the electric power. 
     The estimation part  104  may calculate (estimate) various variables related to use of the battery  40  for traveling regarding the state of the battery  40  for traveling after the electric power has been supplied to the device battery, in addition to the SOC after supply of the electric power. For example, the estimation part  104  may calculate (estimate) a traveling distance over which the vehicle  10  will be able to travel, or a time (a usable time) over which an in-vehicle device (for example, an air conditioning system such as an air conditioner or the like) included in the vehicle  10  will be able to be used in a state with an SOC after supply of the electric power. In addition, the estimation part  104  may calculate (estimate) a time (an electric power suppliable time) in which electric power can be supplied to the outside of the vehicle  10  when the other device is connected to the power feeding port  80  of the vehicle  10 . Further, items when the battery  40  for traveling is used in a state in which the estimation part  104  has became the SOC after supply of the electric power are not limited to the above-mentioned items. The estimation part  104  outputs the battery-related information including also information of calculated (estimated) items, in addition to the SOC after supply of the electric power, to the HMI  60 , and displays the output information on the display device included in the HMI  60 . 
     After that, the battery information providing device  100  instructs the controller  36  to supply the electric power to the power feeding port  80  when the user U instructs to start the charge. Accordingly, the controller  36  supplies the electric power of the battery  40  for traveling to the power feeding port  80 , and the device battery included in the user terminal T connected to the power feeding port  80  is charged. 
     [Example of Screen Providing Battery-related Information] 
     Here, an example of the screen providing the battery-related information calculated (estimated) in the battery information providing device  100  (more specifically, the estimation part  104 ) to the user U will be described.  FIG. 3  is a view showing an example of a screen IM providing the battery-related information estimated (calculated) by the battery information providing device  100 . The battery information providing device  100  displays the screen IM shown in  FIG. 3  on the display device such as an in-vehicle navigation device or the like, and provides the screen IM to the user U. In  FIG. 3 , an example of the screen IM is shown which provides the battery-related information and which prompts input of an instruction (input of a charging instruction) regarding whether charging of the user terminal T is to be performed after confirming the provided battery-related information. 
     In the screen IM shown in  FIG. 3 , the information showing the user terminal T (in  FIG. 3 , a smart phone) connected to the power feeding port  80  and the battery-related information are provided in a display area Ia in which the battery-related information is displayed. As the items related to the battery-related information provided in the display area Ia, “the battery charging rate (SOC),” “the travelable distance,” “the air conditioner operating time” and “the electric power suppliable time” are shown. “The current” value shown in the items is the SOC before supply of the electric power of the battery  40  for traveling acquired from the controller  36  by the acquisition part  102  or the value calculated (estimated) in a state of the SOC before supply of the electric power by the estimation part  104 , and the value “after charge” is the SOC after supply of the electric power calculated (estimated) by the estimation part  104  or the value calculated (estimated) by the estimation part  104  in the state of the SOC after supply of the electric power. 
     Further, in the screen IM shown in  FIG. 3 , a button BN and a button BY configured to input an instruction whether the user U performs charge of the user terminal T are provided. The button BN is a button configured to instruct not to charge the user terminal with respect to a question “Do you want to execute charging?” The button BY is a button configured to instruct to charge the user terminal with respect to a question “Do you want to execute charging?” The HMI  60  outputs the charge instruction information showing the instruction to the battery information providing device  100  when the button BY is touched. 
     [Example of Processing in Battery Information Providing Device  100 ] 
     Next, an example of a flow of processing in the battery information providing device  100  will be described.  FIG. 4  is a flowchart showing an example of a flow of processing executed by the battery information providing device  100 . 
     First, the battery information providing device  100  checks whether the user terminal T is connected to the power feeding port  80  (step S 100 ). When it is determined that the user terminal T is not connected to the power feeding port  80 , the battery information providing device  100  waits until the user terminal T is connected to the power feeding port  80 . 
     When it is checked that the user terminal T is connected to the power feeding port  80  in step S 100 , the acquisition part  102  included in the battery information providing device  100  acquires the current SOC (the SOC before supply of the electric power) of the battery  40  for traveling from the controller  36  (step S 102 ). For example, the battery information providing device  100  instructs calculation of the SOC before supply of the electric power with respect to the controller  36 , and acquires the SOC before supply of the electric power calculated by the controller  36 . The acquisition part  102  outputs the acquired SOC before supply of the electric power to the estimation part  104 . 
     Next, the acquisition part  102  acquires the device battery information input from the HMI  60  by the user U (step S 104 ). Here, the battery information providing device  100  may instruct display of the screen that urges input of the device battery information to the HMI  60 , and acquire the device battery information output from the HMI  60  after the user U has input with respect to the displayed screen. The acquisition part  102  outputs the acquired device battery information to the estimation part  104 . 
     Next, the estimation part  104  calculates (estimates) the SOC after supply of the electric power on the basis of the SOC before supply of the electric power and the device battery information output from the acquisition part  102  (step S 106 ). Then, the estimation part  104  outputs the information of the calculated (estimated) SOC after supply of the electric power as the battery-related information to the HMI  60 , and instructs display of the screen that provides the battery-related information to the HMI  60 . Accordingly, for example, the HMI  60  displays the screen IM like the example shown in  FIG. 3  on the display device, and provides the battery-related information output from the estimation part  104  to the user U (step S 108 ). 
     After that, the battery information providing device  100  determines whether the charge instruction information is input from the HMI  60  (step S 110 ). When the charge instruction information is not input, the battery information providing device  100  terminates the processing of the flowchart. 
     In step S 110 , when the charge instruction information is input, the battery information providing device  100  instructs the controller  36  to perform supply of the electric power of the battery  40  for traveling to the power feeding port  80 . Accordingly, the device battery included in the user terminal T is charged by the electric power supplied by the power feeding port  80  (step S 112 ). Then, the battery information providing device  100  terminates the processing of the flowchart. 
     As described above, according to the battery information providing device  100  of the first embodiment, when the power feeding port  80  is connected to the user terminal T, the SOC before supply of the electric power and the device battery information of the battery  40  for traveling are acquired, and the SOC after supply of the electric power of the battery  40  for traveling is calculated (estimated) on the basis of the SOC before supply of the electric power and the device battery information that were acquired. Then, according to the battery information providing device  100  of the first embodiment, the battery-related information including the calculated (estimated) SOC after supply of the electric power is provided to the user U. After that, according to the battery information providing device  100  of the first embodiment, after the charge instruction of performing the charge is performed by the user U, charge of the device battery included in the user terminal T is actually started. Accordingly, the user (the user U or the like) of the vehicle  10  in which the battery information providing device  100  of the first embodiment is employed can perceive the state of the battery  40  for traveling after charge of the device battery before the charge of device battery included in the connected user terminal T is performed. Then, the user of the vehicle  10 , in which the battery information providing device  100  of the first embodiment is employed, can perform charge of the device battery included in the user terminal T without anxiety while checking that there is no hindrance in traveling of the vehicle  10  or in use of the in-vehicle device hereinafter. 
     In the first embodiment, the configuration and processing of the battery information providing device  100  have been described as inputting the device battery information to the HMI  60  by the user U. On the other hand or in addition, the device battery information may be acquired by performing direct communication between the communication device  50  and the user terminal T and receiving the device battery information transmitted from the user terminal T. For example, when the user terminal T and the communication device  50  communicate with each other in a wireless manner through, for example, Wi-Fi, Bluetooth (Registered trademark), or the like, the communication device  50  may receive information of an electric power capacity of the device battery transmitted from the user terminal T through direct wireless communication between the user terminal T and the communication device  50 , or information of a battery residual amount, i.e., the current SOC of the device battery or the like, as the device battery information. Here, for example, when a deterioration state of the device battery in the user terminal T is managed, the communication device  50  may receive the information of the deterioration state of the device battery transmitted from the user terminal T as the device battery information. In addition, for example, when the power feeding port  80  is a USB terminal, the communication device  50  includes a communication module configured to perform USB communication, and the user terminal T and the power feeding port  80  are connected by the cable C that enables communication by a USB, the communication device  50  may directly acquire the device battery information from the user terminal T through USB communication via the power feeding port  80  and the cable C. When the communication device  50  directly acquires (receives) the device battery information from the user terminal T, the acquisition part  102  acquires each of the device battery information, which is directly acquired (received) from the user terminal T by the communication device  50 , from the communication device  50 , for example, in step S 104 . 
     Second Embodiment 
     In addition, the device battery information can be acquired from the battery management server device on a network (not shown) in which the communication device  50  manages a state of the battery  40  for traveling mounted in the vehicle  10 . Hereinafter, the case will be described. 
     [Configuration of battery information providing system] 
     Next, an example of the battery information providing system including the battery information providing device  100  and the server device will be described.  FIG. 5  is a view showing an example of a configuration and a use environment of a battery information providing system  1  according to a second embodiment. The battery information providing system  1  shown in  FIG. 5  includes, for example, the battery information providing device  100  employed in the vehicle  10 , a battery management server device  200 , and a device management server device  300 . 
     Even in the example of  FIG. 5 , the user terminal T is connected to the power feeding port  80  of the vehicle  10  by the cable C. In the battery information providing system  1  shown in  FIG. 5 , the battery information providing device  100  acquires the device battery information related to the device battery included in the user terminal T through wireless communication by the communication device  50 . 
     The communication device  50  and the battery management server device  200  communicate with each other via a network NW. In addition, the user terminal T and the device management server device  300  communicate with each other via the network NW. In the battery information providing system  1 , the battery management server device  200  and the device management server device  300  also communicate with each other via the network NW. The network NW is a communication network for wireless communication including, for example, the Internet, a wide area network (WAN), a local area network (LAN), a provider device, a radio base station, or the like. 
     The battery management server device  200  communicates with the communication device  50  of the vehicle  10 , and manages, for example, a state (a charge state, a deterioration state, or the like) of the battery  40  for traveling mounted in the vehicle  10  on the basis of the communication result. The plurality of battery management server devices  200  may be present on the network NW. However, even when the plurality of battery management server devices  200  are present on the network NW, the battery management server device  200  corresponding to the vehicle  10  is one of the battery management server devices  200 , or is operated as the one battery management server device  200 . 
     The user terminal T transmits the information required to manage the device battery by the device management server device  300  to the device management server device  300 . The information required to manage the device battery by the device management server device  300  may include, for example, information such as a battery residual amount or the like displayed on the display device included in the user terminal T. In addition, the information required to manage the device battery by the device management server device  300  may include, for example, a physical quantity used to determine (diagnose) the current SOC or the deterioration state of the device battery, such as a current, a voltage, a temperature, or the like. 
     In the user terminal T, for example, an application and the like are executed which performs transmission and reception of information used to automatically manage the state of the device battery by the device management server device  300  (hereinafter, referred to as “a battery management application”). Then, the battery management application transmits information required to manage the device battery by the device management server device  300  at a predetermined timing. In addition, when the user terminal T is connected to the vehicle  10  by the user U, the battery management application notifies that. For this reason, information regarding the vehicle  10 , which is connected to the device battery so as to charge the device battery included in the user terminal T (hereinafter, referred to as “vehicle information”), is previously set in the battery management application. The vehicle information includes, in addition to the information such as a maker, a vehicle type, or the like, of the vehicle  10 , for example, information that specifies the vehicle  10  (hereinafter, referred to as “vehicle specifying information”). As the vehicle specifying information, various types of information of specifying the vehicle  10 , for example, a chassis number, a car identification plate (what is called, a number plate), or the like, of the vehicle  10  are considered. 
     Further, the battery management application may include a function of automatically inputting the device battery information which the user U inputs to the HMI  60 , for example, information of the electric power capacity of the device battery, information of the battery residual amount, or the like. In this case, the user terminal T can transmit the device battery information to the battery information providing device  100  without requiring an operation by the user U. 
     The device management server device  300  manages a state of the device battery included in the user terminal T on the basis of the information acquired through communication from the user terminal T. More specifically, the device management server device  300  manages information (including the device battery information) used to calculate (estimate) the SOC after supply of the electric power when the user terminal T is connected to the vehicle  10 , for example, a rated value such as an electric power capacity or the like of the device battery, a charge state of the device battery (i.e., the current SOC of the device battery), a deterioration state of the device battery, or the like. For example, when a physical quantity such as a current, a voltage, a temperature, or the like is received as information required to manage the device battery, the device management server device  300  performs calculation of the current SOC of the device battery or diagnosis of the deterioration state on the basis of the received physical quantity, and manages the results thereof. Further, the plurality of device management server devices  300  may be present on the network NW. However, even when the plurality of battery management server devices  300  are present on the network NW, the battery management server device  300  corresponding to the user terminal T is one of the battery management server devices  300 , or is operated as the one battery management server device  300 . 
     When the battery information providing device  100  has confirmed that the user terminal T is connected to the power feeding port  80 , the communication device  50  requests with respect to the battery management server device  200  for a transmission of the device battery information of the user terminal T connected to the vehicle  10 , and receives the information. The battery management server device  200  acquires the device battery information of the user terminal T connected to the vehicle  10  from the device management server device  300  according to requests from the communication device  50 , and transmits the information to the communication device  50 . The communication device  50  receives the device battery information from the battery management server device  200  and outputs the received information to the battery information providing device  100 . The battery information providing device  100  calculates (estimates) the SOC after supply of the electric power of the battery  40  for traveling using the device battery information input from the communication device  50 . [Example of Flow of Entire Processing of Battery Information Providing System] 
     Next, an example of the entire flow in the battery information providing system  1  will be described.  FIG. 6  is a sequential diagram showing an example of the entire flow of processing executed by the battery information providing system  1 . 
     In the following description, the battery management application in the user terminal T is executed, and various operations are controlled. 
     The user U connects the user terminal T to the power feeding port  80  of the vehicle  10  (step S 10 ). The battery management application notifies (transmits) that the user terminal T has been connected to the vehicle  10  together with the vehicle information including the vehicle specifying information with respect to the device management server device  300  (step S 12 ). 
     When the device management server device  300  receives the notice and vehicle information transmitted by the user terminal T are received, the device management server device  300  transmits the SOC requesting signal that is for requesting a transmission of the current SOC of the device battery included in the user terminal T with respect to the user terminal T (step S 14 ). When the battery management application receives the SOC requesting signal transmitted from the device management server device  300 , the battery management application transmits the information of the current charge state (the current SOC) of the device battery to the device management server device  300  (step S 16 ). Further, the processing of step S 16  in the battery management application may be performed simultaneously with the processing of step S 12 . That is, the battery management application may also transmit the information of the current SOC of the device battery when the notification, which notifies the user terminal T has been connected to the vehicle  10 , and the vehicle information are transmitted to the device management server device  300 . In this case, the processing of step S 14  in the device management server device  300  may not be performed. 
     Meanwhile, the battery information providing device  100  checks whether the user terminal T is connected to the power feeding port  80  in step S 100 . When it is confirmed by the battery information providing device  100  that the user terminal T is connected to the power feeding port  80 , the acquisition part  102  acquires the SOC before supply of the electric power from the controller  36  in step  5102 . The acquisition part  102  outputs the acquired SOC before supply of the electric power to the estimation part  104 . 
     Next, the acquisition part  102  acquires the device battery information from the communication device  50 . The acquisition processing of the device battery information from the communication device  50  in the acquisition part  102  is as follows. 
     First, the acquisition part  102  instructs the communication device  50  to acquire the device battery information. Accordingly, the communication device  50  requests transmission of the device battery information with respect to the battery management server device  200  (step S 20 ). More specifically, the communication device  50  transmits the information requesting signal that requests the device battery information and the identification information that identifies the vehicle  10  to the battery management server device  200 . The identification information of the vehicle  10  may be, for example, identification information (for example, a battery ID) of the battery  40  for traveling used when the battery management server device  200  manages a state of the battery  40  for traveling included in the vehicle  10 . 
     The battery management server device  200  requests transmission of the device battery information of the device battery included in the user terminal T connected to the vehicle  10  with respect to the device management server device  300  on the network NW when the information requesting signal transmitted from the vehicle  10  (more specifically, the communication device  50 ) and the identification information of the vehicle  10  are received (step S 22 ). More specifically, the battery management server device  200  transmits the battery information requesting signal that requests the device battery information and the identification information of the vehicle  10  to the device management server device  300 . Further, when the identification information of the vehicle  10  received by the battery management server device  200  is the battery ID, the battery management server device  200  converts the received battery ID into the identification information of the vehicle  10  in which the battery  40  for traveling having the battery ID is mounted, and transmits the converted identification information of the vehicle  10  to the device management server device  300  together with the battery information requesting signal. 
     When the battery information requesting signal and the identification information of the vehicle  10  transmitted from the battery management server device  200  are received by the device management server device  300 , the device management server device  300  specifies the user terminal T to which the device battery information was requested by the battery management server device  200  with reference to the received identification information of the vehicle  10  and the vehicle information which was transmitted from the user terminal T to which the connection to the vehicle  10  is notified. Then, the device management server device  300  transmits the device battery information of the specified user terminal T to the battery management server device  200  that requested (step S 24 ). The device battery information includes the current SOC acquired from the user terminal T by the device management server device  300  in the processing of step S 14  and step S 16 . 
     Further, the device management server device  300  may not perform the processing (processing of step S 12  to step S 16 ) of acquiring the current SOC of the device battery at the timing after the notification of the connection of the user terminal T to the vehicle  10 , and may perform processing of acquiring the current SOC of the device battery after the user terminal T to which the device battery information was requested is specified. In this case, the device management server device  300  receives the information of the current SOC of the device battery transmitted by the battery management application in the process of acquiring the current SOC of the device battery, which is performed after the device battery information is requested by the battery management server device  200 , and then, transmits the device battery information including the received current SOC to the battery management server device  200  in step S 24 . 
     When the battery management server device  200  receives the device battery information transmitted from the device management server device  300 , the battery management server device  200  transmits the received device battery information to the vehicle  10  (more specifically, the communication device  50 ) (step S 26 ). When the communication device  50  receives the device battery information transmitted from the battery management server device  200 , the communication device  50  outputs the received device battery information to the acquisition part  102 . Accordingly, the acquisition part  102  acquires the device battery information from the communication device  50 , and outputs the acquired device battery information to the estimation part  104 . 
     Then, in the battery information providing device  100 , the estimation part  104  calculates (estimates) the SOC after supply of the electric power of the battery  40  for traveling in step  5106 , and provides the information of the calculated (estimated) SOC after supply of the electric power to the user U as the battery-related information in step S 108 . 
     After that, the battery information providing device  100  determines whether the charge instruction information is input from the HMI  60  in step S 110 , instructs the controller  36  to supply the electric power of the battery  40  for traveling to the power feeding port  80  in step S 112  when the charge instruction information is input, and charges the device battery included in the user terminal T. 
     As described above, according to the battery information providing system  1  of the second embodiment, when the user terminal T is connected to the power feeding port  80 , the battery information providing device  100  acquires the SOC before supply of the electric power of the battery  40  for traveling, and acquires the device battery information from the battery management server device  200  via the network NW. Then, the battery information providing device  100  calculates (estimates) the SOC after supply of the electric power of the battery  40  for traveling on the basis of the SOC before supply of the electric power and the device battery information, which were acquired. Then, according to the battery information providing system  1  of the second embodiment, after the battery information providing device  100  provides the battery-related information including the calculated (estimated) SOC after supply of the electric power to the user U and a charge instruction to perform the charge is provided by the user U, the charge of the device battery included in the user terminal T is actually started. Accordingly, the user (the user U or the like) of the vehicle  10  in which the battery information providing system  1  of the second embodiment is employed can perceive the state of the battery  40  for traveling after the device battery is charged before the charge of the device battery included in the connected user terminal T is performed. Then, the user of the vehicle  10  in which the battery information providing system  1  of the second embodiment is employed can perform the charge of the device battery included in the user terminal T without anxiety while confirming that there is no hindrance in traveling of the vehicle  10  or in use of the in-vehicle device hereinafter. 
     In the second embodiment, the battery information providing device  100  may acquire the device battery information from the device management server device  300  without going through the battery management server device  200 . In this case, for example, the battery information providing device  100  requests transmission of device battery information to the device management server device  300  in the same processing as that of step S 20 . Then for example, the device management server device  300  transmits the device battery information to the battery information providing device  100  according to requests from the battery information providing device  100  in the same processing as that of step S 24 . Further, a flow of the processing between the battery information providing device  100  and the device management server device  300  in this case can be easily understood with reference to an example of the entire flow in the battery information providing system  1  shown in  FIG. 6 . For this reason, detailed description related to the flow of the processing of the components when the battery information providing device  100  acquires the device battery information from the device management server device  300  will be omitted. 
     In the second embodiment, when the other device (for example, a note PC) that cannot use a cellular network is connected to the power feeding port  80  of the vehicle  10 , it is assumed that the information of the device battery included in the other device is not managed by the device management server device  300 . In this case, a case can be considered that the other device (for example, the user terminal T) that can use the cellular network acquires the information of the device battery from the other device that cannot use the cellular network and transmits the acquired information to the device management server device  300 . More specifically, when the other device that cannot use the cellular network is a note PC, it can be considered that the battery management application executed in the user terminal T acquires the device battery information related to the device battery included in the note PC from the note PC through wireless communication such as Wi-Fi, a Bluetooth (Registered trademark), or the like, and transmits the acquired information to the device management server device  300 . Similarly even in this case, it is possible to perceive the state of the battery  40  for traveling after the electric power of the battery  40  for traveling is supplied to the note PC. Further, in the flow of the processing of these components in this case, while the processing of transmitting and receiving the device battery information between the user terminal T and the note PC through wireless communication are added when the battery information providing device  100  acquires the device battery information, the other processing can be easily understood as being considered in the same manner. For this reason, like the case in which the device battery information of the device battery included in the above-mentioned note PC is acquired by the user terminal T, the configuration in the case in which the device battery information of the device battery included in a device which is an object to be supplied with the electric power is acquired in conjunction with the plurality of the other devices or detailed description related to the flow of the processing of these components will be omitted. 
     According to the battery information providing device of the above-mentioned embodiment, since the acquisition part  102  configured to acquire the battery charging rate (the SOC before supply of the electric power) of the battery  40  for traveling mounted in the vehicle  10  and in which electric power for traveling is stored and the device battery information related to the device battery included in the device (here, the user terminal T) which is the object to be supplied with the electric power connected to the vehicle  10 , and the estimation part  104  configured to estimate the state of the battery  40  for traveling (for example, the SOC after supply of the electric power) after the electric power stored in the battery  40  for traveling has been supplied to the device battery on the basis of the SOC before supply of the electric power and the device battery information and configured to output (display) the battery-related information (for example, the SOC after supply of the electric power) related to the estimated state of the battery  40  for traveling to the information output part (here, the display device included in the HMI  60 ) are provided, for example, the user of the vehicle  10  such as a driver or the like (may be the user U of the user terminal T) can perceive the state of the battery  40  for traveling after the electric power stored in the battery  40  for traveling mounted in the vehicle  10  has been supplied to the device which is the object to be supplied with the electric power (after the device battery included in the user terminal T is charged). Accordingly, the user of the vehicle  10  in which the battery information providing device  100  or the battery information providing system  1  is employed can perform the charge of the device battery included in the user terminal T without anxiety while confirming that there is no hindrance in traveling of the vehicle  10  or in use of the in-vehicle device hereinafter. In other words, in the vehicle  10  in which the battery information providing device  100  or the battery information providing system  1  is employed, for example, it is possible to prevent a situation in which the battery  40  for traveling runs out its electric power during traveling and the vehicle  10  cannot continue traveling. 
     The above-mentioned embodiment can be expressed as follows. 
     A battery information providing device comprising: 
     a hardware processor; and 
     a storage device in which a program is stored, 
     wherein, as the hardware processor reads and executes a program stored in the storage device, the battery information providing device is configured to 
     acquire a battery charging rate of a battery, which is mounted on a vehicle and which stores electric power for traveling the vehicle, and device battery information related to a device battery which is included in a device, which is an object to which the electric power is supplied, connected to the vehicle, 
     estimate a state of the battery after the electric power stored in the battery has been supplied to the device battery on the basis of the battery charging rate and the device battery information, and 
     output battery-related information related to the estimated state of the battery to an information output part. 
     Further, in the embodiment, the case in which the vehicle  10  in which the battery information providing device is employed is the BEV has been described. However, the electric automobile is, for example, a hybrid electric automobile (HEV) or the like that travels using an electric motor (electric motor) driven by electric power supplied according to an operation of an internal combustion engine such as an engine or the like operated by fuel or electric power supplied from a battery (a secondary battery) for traveling. For this reason, the battery information providing device or the battery information providing system may also be employed in such a hybrid electric automobile. Also similarly in this case, it is possible to perceive the state of the battery after the electric power stored in the battery is supplied to the device which is the object to be supplied with the electric power. Further, a flow of processing in the battery information providing device or the battery information providing system employed in the hybrid electric automobile can be easily understood as being similarly considered as the flow of the processing in the battery information providing device or the battery information providing system employed in the BEV according to the above-mentioned embodiment. For this reason, detailed description related to the flow of the processing in the battery information providing device or the battery information providing system employed in the hybrid electric automobile will be omitted. 
     In addition, for example, there is also an electrically driven vehicle that travels using an electric motor driven by electric power supplied from a fuel cell, for example, a fuel cell vehicle (FCV) or the like. The battery information providing device or the battery information providing system may also be employed in the fuel cell vehicle. In this case, the battery described in the embodiment is replaced with a fuel cell. Then, the SOC before supply of the electric power or the SOC after supply of the electric power described in the embodiment is replaced with a residual amount of fuel (for example, hydrogen or the like) consumed to supply electric power from the fuel cell. For this reason, the SOC before supply of the electric power acquired by the acquisition part included in the battery information providing device is the current residual amount of the fuel, and the SOC after supply of the electric power calculated (estimated) by the estimation part included in the battery information providing device is a residual amount of the fuel after the device battery included in the device of the connected power feeding object is charged. However, a flow of processing in the battery information providing device or the battery information providing system employed in the fuel cell vehicle can be easily understood as being similarly considered as the flow of the processing in the battery information providing device or the battery information providing system employed in the BEV according to the above-mentioned embodiment. For this reason, detailed description related to a flow of processing in the battery information providing device or the battery information providing system employed in the fuel cell vehicle will be omitted. 
     While preferred embodiments of the invention have been described and illustrated above, it should be understood that these are exemplary of the invention and are not to be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the scope of the present invention. Accordingly, the invention is not to be considered as being limited by the foregoing description, and is only limited by the scope of the appended claims.