Abstract:
An apparatus for managing power of a vehicle and a method of controlling the same, for effectively shutting off dark current are disclosed. The method includes determining a first battery state when a preset first condition is satisfied; cutting off a first portion load or all loads based on the determination of the first battery state; determining a second battery state when a preset second condition is satisfied; and releasing load interruption or cutting off a second portion load except for the first portion load from the all loads based on the determination of the second battery state.

Description:
[0001]    This application claims the benefit of Korean Patent Application No. 10-2016-0034517, filed on Mar. 23, 2016, the entire contents of which is hereby incorporated by reference. 
       BACKGROUND 
       [0002]    Field of the Disclosure 
         [0003]    The present disclosure relates to an apparatus for managing power of a vehicle and a method of controlling the same, for effectively shutting off dark current. 
         [0004]    Discussion of the Related Art 
         [0005]    In general, a vehicle includes a fuse box installed therein that includes fuses for the protection of circuits from power supplied from various electronic apparatuses. However, recently, a smart junction box (SJB) such as a fuse box with a multi-function, as well as a general fuse box function, which includes a micro controller (microcomputer) so as to control operating time of various relay circuits and some electronic apparatuses, has been extensively used in accordance with current trends. 
         [0006]      FIG. 1  is a diagram illustrating an example of a configuration of a general smart junction box  100 . 
         [0007]    Referring to  FIG. 1 , the smart junction box  100  may include a microcomputer  110  for performing control to supply or shut off power supplied from a battery  210  to various loads in a vehicle by operating a relay and an intelligent power switch (IPS) based on a state of a vehicle switch  230  and a control signal received through a communication unit  220 . In addition, the smart junction box  100  may include a fuse switch  120  that is generally turned on after a vehicle is manufactured and transferred to a customer, and the microcomputer  110  may control power supplied to the vehicle using different methods according to a state of the fuse switch  120 , which will be described below with reference to  FIG. 2 . 
         [0008]      FIG. 2  is a flowchart illustrating an example of a procedure for managing vehicle power in a general smart junction box. 
         [0009]    Referring to  FIG. 2 , as an external switch input is generated or controller area network (CAN) communication is activated, a smart junction box may supply power to various load systems in a vehicle (S 201 ). When a sleep mode entrance condition is satisfied (e.g., when body CAN communication enters a sleep mode, etc.) after power begins to be supplied (S 202 ), the smart junction box may enter a sleep mode (S 203 ) and perform an operation for shutting off dark current. 
         [0010]    The operation for shutting off dark current may be changed according to a state of a fuse switch (S 204 ). In detail, when the vehicle is transferred and the fuse switch is turned on, if a timer is started and predetermined time (e.g., 20 minutes) elapses (S 205 ), a lamp load is firstly cut off (S 206 ) and when longer time (e.g., 12 hours) elapses (S 207 ), a body electronic device load may be cut off (S 208 ). When the body electronic device load is cut off, a microcomputer is powered off (S 209 ) and a corresponding state is maintained until a preset release condition is satisfied (S 210 ). Here, when a locking signal is received through a remote controller such as a smart key after the timer is started, the load may begin to be cut off after a shorter time (e.g., five seconds) elapses. In addition, the preset release condition may include change in external switch input and/or CAN communication activation. 
         [0011]    When a fuse switch is in an off state, if a predetermined amount of time (e.g., five minutes) elapses after the timer is started (S 211 ), all loads may be cut off at one time (S 222 ). 
         [0012]    However, when the aforementioned smart junction box is applied, since only limited kinds of loads such as a lamp load and a body load are cut off according a fixed time schedule, there is a limit in shutting off dark current. 
       SUMMARY 
       [0013]    Accordingly, the present disclosure is directed to an apparatus for managing power of a vehicle and a method of controlling the same that substantially obviates one or more problems due to limitations and disadvantages of the related art. 
         [0014]    An object of the present disclosure is to provide an apparatus for managing power of a vehicle and a method of controlling the same, for effectively shutting off dark current. 
         [0015]    In particular, an object of the present disclosure is to provide an apparatus for managing power of a vehicle and a method of controlling the same, for shutting off dark current according to a battery power state. 
         [0016]    Additional advantages, objects, and features of the disclosure will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of forms of the disclosure. The objectives and other advantages of the disclosure may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
         [0017]    To achieve these objects and other advantages and in accordance with the purpose of the disclosure, as embodied and broadly described herein, a method for controlling an apparatus for managing power of a vehicle includes determining a first battery state when a preset first condition is satisfied; interrupting a first portion load or all loads based on the determination of the first battery state; determining a second battery state when a preset second condition is satisfied; and releasing load interruption or interrupting a second portion load except for the first portion load from the all loads based on the determination of the second battery state. 
         [0018]    In another aspect of the present disclosure, an apparatus for managing power of a vehicle includes a communication module for receiving information on a battery state, a microcomputer, and an interrupter for interrupting (cutting off) power supply to each of at least one load according to control of the microcomputer. The microcomputer is configured to determine a first battery state when a preset first condition is satisfied and to control the interrupter to interrupt a first portion load or all loads according to a result of the determination of the first battery state, to determine a second battery state when a preset second condition is satisfied and to control the interrupter to release load interruption or to interrupt a second portion load except for the first portion load from the all loads according to a result of the determination of the second battery state. 
         [0019]    It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0020]    The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate form(s) of the disclosure and together with the description serve to explain the principle of the disclosure. In the drawings: 
           [0021]      FIG. 1  is a diagram illustrating an example of a configuration of a general smart junction box; 
           [0022]      FIG. 2  is a flowchart illustrating an example of a procedure for managing vehicle power in a general smart junction box; 
           [0023]      FIGS. 3A and 3B  are diagrams illustrating an example of a configuration of a power management system; and 
           [0024]      FIG. 4  is a diagram illustrating an example of a procedure for managing power in consideration of a battery state in a vehicle. 
       
    
    
     DETAILED DESCRIPTION 
       [0025]    Hereinafter, the present disclosure will be described in detail by explaining exemplary forms of the disclosure with reference to the attached drawings. The same reference numerals in the drawings denote like elements, and a repeated explanation thereof will not be given. In addition, the suffixes “module” and “unit” of elements herein are used for convenience of description and thus can be used interchangeably and do not have any distinguishable meanings or functions. 
         [0026]    In the description of the present disclosure, certain detailed explanations of related art are omitted when it is deemed that they may unnecessarily obscure the essence of the disclosure. The features of the present disclosure will be more clearly understood from the accompanying drawings and should not be limited by the accompanying drawings. It is to be appreciated that all changes, equivalents, and substitutes that do not depart from the spirit and technical scope of the present disclosure are encompassed in the present disclosure. 
         [0027]    A form of the present disclosure proposes an apparatus for managing power of a vehicle, for determining a range of cut off loads in additional consideration of a battery state as well as elapsed time in order to control shut off of dark current. 
         [0028]    In the specification, for convenience of description, an apparatus for managing power of a vehicle is assumed to be a smart junction box (SJB). However, this is merely exemplary and, thus, the apparatus for managing power of a vehicle may be embodied by determining a battery state and requesting an SJB to perform a dark-current shut-off function by another controller. 
         [0029]    In forms of the present disclosure, when a state of charge (SOC) of a battery is a predetermined value or less, all loads of the vehicle may be cut off, to ensure future startability. 
         [0030]    In forms of the present disclosure, information on an SOC of a battery may be acquired from a battery sensor and another controller instead of an engine controller may control the battery sensor when a vehicle is turned off (i.e., the SOC of the battery may be acquired and transmitted to a power management apparatus). Here, another controller may be a controller such as a smart key controller (SMK) that is turned on even when the vehicle is turned off. In particular, this configuration requires a controller functioning as a LIN master when a local interconnection network (LIN) communication method is used when the battery sensor communicates with an external device and, thus, it may be advantageous to provide a controller that always functions as a LIN master irrespective of whether the vehicle is turned on. 
         [0031]    A system for managing power of a vehicle for the above case will be described below with reference to  FIGS. 3A and 3B . 
         [0032]      FIGS. 3A and 3B  illustrate an example of a configuration of a power management system. 
         [0033]    Referring to  FIG. 3A , a battery sensor  320  may detect a state of charge (SOC) of a battery  310 . In this case, when the battery sensor  320  externally transmits the detected SOC information via LIN communication, a LIN master controller may be varied according to whether a vehicle is turned on. For example, when the vehicle is turned on (IGN ON), an engine management system (EMS)  330  may function as a LIN master controller. This is because the EMS  330  needs to periodically monitor battery state information from the battery sensor  320  in an IGN-ON state for power generation and does not have to manage interruption of dark current of the vehicle in an IGN-ON state. 
         [0034]    In addition, when the vehicle is turned off (IG OFF), in order to actively shut off dark current according to a vehicle battery state, the SOC information needs to be transmitted to a smart junction box (SJB)  350  and, thus, a smart key controller (SMK)  340  may function as a LIN master controller. 
         [0035]    In more detail, the battery sensor  320  may periodically acquire SOC information of a battery and when the SOC is a reference value (e.g., 70%) or less, the SMK  340  may transmit a predetermined communication message (e.g., a low SOC state value) to the SJB  350  to wake up the SJB  350 . The awake SJB  350  may shut off dark current according to a procedure illustrated in  FIG. 4 , which will be described later. 
         [0036]    In a general SJB, one fuse switch, one intelligent power switch (IPS), and one relay are applied. However, the SJB  350  according to forms of the present disclosure may apply IPSs  352  controlled by a microcomputer  351  for respective loads as illustrated in  FIG. 3B . 
         [0037]    Hereinafter, a procedure for managing power of an SJB will be described with reference to  FIG. 4 . 
         [0038]      FIG. 4  is a diagram illustrating an example of a procedure for managing power in consideration of a battery state in a vehicle. 
         [0039]    In  FIG. 4 , operations S 401  to S 403  are similar to operation S 201  to S 203  of  FIG. 2  and operation S 405   a  is similar to operations S 205  to S 208  of  FIG. 2  and, thus, a repeated description will be omitted for clarify. 
         [0040]    In a general SJB, different loads are cut off according to a state of a fuse switch. However, as illustrated in  FIG. 4 , different loads may be cut off according to a battery SOC. This may be roughly classified into three cases and will be described below. 
         [0041]    A first case refers to a state just before a battery is discharged when an SOC of the battery is a predetermined level (e.g., 70%) or less after entrance into a sleep mode (S 404 ). Accordingly, an SJB may immediately cut off all loads (S 405   b ) and enter a microcomputer power-off mode to delay battery discharge as much as possible (S 406 ). 
         [0042]    As a second case, when a SOC of a battery is normal after entrance into a sleep mode (S 404 ), some loads are shut off according to time via a general method (S 405   a ) and the battery may enter a microcomputer power-off mode (S 406 ). Then, when a sleep mode release condition such as a change in external switch input or reception of a request for activation via CAN communication is satisfied (S 407 ), whether all loads are cut off or power is supplied may be determined (S 409 ) according to the SOC of the battery (S 408 ). As the determination result, when the SOC of the battery is a reference value or more, there is no problem in terms of car starting and, thus, power may be immediately supplied to loads (to operation S 401 ). This is because, when a vehicle is left alone for a long period of time after entrance into a microcomputer power-off mode, the battery SOC is degraded to a predetermined level or less and, thus, the battery SOC may be re-checked before power is supplied to the vehicle. 
         [0043]    As a third case, when a sleep mode release condition is satisfied (S 407 ) and a battery SOC is determined to be equal to or less than a reference value, an SJB may determine whether all loads are cut off (S 409 ) and when all loads are not cut off, non-cut off loads (i.e., a multimedia load and a wake-up load) are cut off (S 410 ), which is performed in order to prevent additional dark current from being generated. Then, along with entrance into a microcomputer power-off mode (SS 406 ), time may be delayed until a battery of a vehicle is entirely discharged. 
         [0044]    In operation S 409 , when all loads are determined to be already shut off, the SJB may re-enter a microcomputer power-off mode according settings (S 406 ) and when a release condition is re-satisfied after all loads are cut off, a driver may want to use a load and, thus, power may be applied to each load (S 401 ). 
         [0045]    According to at least one form of the present disclosure, the following advantages may be achieved. 
         [0046]    Dark current of a vehicle may be effectively shut off so as to prevent unnecessary battery consumption. 
         [0047]    In particular, it may be more effective to determine a range of cut off loads according to a battery state of a vehicle. 
         [0048]    It will be appreciated by persons skilled in the art that that the effects that could be achieved with the present disclosure are not limited to what has been particularly described hereinabove and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings. 
         [0049]    The disclosure can also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium is any data storage device that can store programs or data which can be thereafter read by a computer system. Examples of the computer readable recording medium include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy discs, optical data storage devices, and so on. In addition, the computer readable recording medium may be embodied in the form of Internet wave (e.g., transmission over the Internet). 
         [0050]    It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the spirit or scope of the disclosure. Thus, it is intended that the present disclosure covers the modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.