Source: https://patents.google.com/patent/JP2007288899A/en
Timestamp: 2020-04-04 08:59:25
Document Index: 266892159

Matched Legal Cases: ['arts 60', 'art 64', 'arts 60', 'art 60', 'arts 60', 'arts 60', 'arts 60']

JP2007288899A - Power supply device and control method of same - Google Patents
Power supply device and control method of same Download PDF
JP2007288899A
JP2007288899A JP2006112408A JP2006112408A JP2007288899A JP 2007288899 A JP2007288899 A JP 2007288899A JP 2006112408 A JP2006112408 A JP 2006112408A JP 2006112408 A JP2006112408 A JP 2006112408A JP 2007288899 A JP2007288899 A JP 2007288899A
JP2006112408A
JP4702155B2 (en
Takeshi Shigekari
貴也 相馬
武志 茂刈
2006-04-14 Application filed by Toyota Motor Corp, トヨタ自動車株式会社 filed Critical Toyota Motor Corp
2006-04-14 Priority to JP2006112408A priority Critical patent/JP4702155B2/en
2007-11-01 Publication of JP2007288899A publication Critical patent/JP2007288899A/en
2011-06-15 Publication of JP4702155B2 publication Critical patent/JP4702155B2/en
<P>PROBLEM TO BE SOLVED: To provide a power supply device which can obtain high safety by a small-sized device constitution, and a control device of the power supply device. <P>SOLUTION: A power accumulation device CA is connected to a power supply line PL1 and an earth line PL2 in parallel with a battery B. A service plug SVP includes a resistor R2 therein, and connects the resistor RT2 between connecting points of a relay circuit RL1 by being attached to the power accumulation device CA. The service plug SVP constitutes a member different from a normal safety plug arranged at the power accumulation device CA. When a remaining charge of the power accumulation device CA is almost zero, the service plug SVP is attached to the power accumulation device CA in place of the normal safety plug by an operator when necessary. By this, when the power accumulation device CA is brought into an over-discharging state due to the inspection, maintenance or the like of the power accumulation device CA, the generation of a rush current can be prevented by starting a vehicle system in a state that the power accumulation device is attached with the service plug SVP having a track current limiting device therein. <P>COPYRIGHT: (C)2008,JPO&INPIT
The present invention relates to a power supply device and a control method for the power supply device, and more particularly to a power supply device capable of supplying power from a secondary battery and a capacitor, and a control method for the power supply device.
In such a hybrid vehicle or electric vehicle, in order to improve energy efficiency while driving the vehicle appropriately, power corresponding to the load on the motor is supplied and energy can be efficiently recovered during regeneration. Desired.
In order to meet such a demand, for example, Patent Document 1 discloses a hybrid vehicle in which a power storage device in which a secondary battery and a capacitor are connected in parallel is mounted as a power supply source of a motor.
According to this, charging / discharging of the power storage device is controlled such that the amount of heat generated by the secondary battery becomes the maximum remaining capacity of the power storage device. Therefore, even when it is necessary to charge the power storage device with constant power, the dischargeable output and the chargeable input of the power storage device can be improved by raising the temperature of the secondary battery in a short time.
Patent Document 2 discloses a vehicle control device that drives electric motors by supplying power from either a capacitor or a secondary battery via a power conversion circuit.
According to this, the vehicle control device includes control means for controlling the operation of the power conversion circuit in accordance with the state of the load on the electric motor. And when a control means does not operate a power converter circuit by the state of load, since electric power can be supplied from a capacitor to an electric motor, the energy loss in a power converter circuit does not generate | occur | produce and a fuel consumption can be improved. On the other hand, when the control means operates the power conversion circuit, power can be supplied by the secondary battery, so that the driving force sufficient to drive the vehicle can be generated in the electric motor, and the running performance of the vehicle is reduced. Can be prevented.
JP 2004-15866 A JP 2004-31926 A JP 2002-175791 A
Here, in a vehicle control device including a capacitor and a secondary battery as a power supply source to an electric motor as in the above-mentioned patent document, there is a case where electric charge remaining in the capacitor is discharged after the vehicle system is finished. is there. For example, in maintenance work of a power supply device, there is a case where inspection and maintenance are performed after discharging electric charge remaining in a capacitor in order to ensure work safety.
Accordingly, since the capacitor is in an overdischarged state at the next start-up of the vehicle system, the converter is activated in response to the ignition being turned on by the driver, and the battery is charged from the battery.
However, since the voltage of the capacitor at this time is substantially zero, an excessive current (inrush current) may flow into the capacitor due to a voltage difference with the battery. This inrush current may overheat and damage the inside of the capacitor, and may weld a relay for connecting the capacitor and the power supply line. Therefore, there is a problem that the vehicle system cannot be started immediately after the capacitor is discharged because of concern about the occurrence of such inrush current.
In order to avoid such an inrush current, it is effective to install a current limiting device for controlling the charge / discharge current of the capacitor. For example, a resistance or a reactor is applied as the current limiting device.
However, in a vehicle control device using a large-capacity capacitor as a power supply source, since the output density of the capacitor itself is high, a large current-limiting device with high impedance is required. This helps to increase the size of the device.
Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to provide a power supply device and a control method for the power supply device that can realize high safety with a small device configuration. .
According to the present invention, the power supply device includes a power supply provided to be able to supply power to the power supply line, a drive circuit provided between the power supply line and the motor, and driving and controlling the motor, and a power supply to the power supply line. Power storage device connected in parallel with the power storage device, an open / close device that electrically connects the power storage device and the power supply line in the closed state, and a control device that controls the open / close operation of the open / close device. The power storage device is detachable from the outside with a relay circuit arranged to be connected in series with the switch device on a current path formed including the power line and the power storage device when the switch device is in a closed state. The contacts of the relay circuit are connected via a resistance element in response to being attached to the relay circuit, while the contacts of the relay circuit are made non-conductive in response to being detached from the relay circuit. A first connecting member. When the power supply voltage of the power storage device is equal to or lower than a predetermined threshold, the control device closes the switchgear in response to the first connecting member being attached to the relay circuit.
According to the above power supply device, the current limiting device of the power storage device is installed via the first connecting member configured to be detachable from the outside, so that the current limiting device is permanently installed inside the power supply device. Thus, inrush current can be prevented with a small device configuration.
Preferably, the power storage device is configured to be detachable from the outside, and directly connects between contacts of the relay circuit according to being attached to the relay circuit, while being relayed according to being detached from the relay circuit. It further includes a second connecting member that makes the circuit contact non-conductive. The first connecting member is attached to the relay circuit after the second connecting member is detached from the relay circuit when the power supply voltage of the power storage device is equal to or lower than a predetermined threshold value. The second connecting member is a relay after the first connecting member is detached from the relay circuit when the power supply voltage of the power storage device becomes substantially the same as the voltage of the power supply line in response to the switching device being closed. Attached to the circuit.
According to the power supply device described above, when the power supply voltage of the power storage device is equal to or lower than the predetermined threshold value, the first connection member including the current limiting device is attached inside instead of the normal second connection member. Generation of an inrush current can be reliably prevented with this device configuration.
Preferably, the control device includes a determination unit that determines whether or not the first connection member is attached to the relay circuit. The determination unit includes a charge request detection unit that detects that a charge request for the power storage device has been designated from the outside, and a relay circuit detection unit that detects conduction or non-conduction between the contact points of the relay circuit. When it is detected that a request has been specified and continuity between contacts of the relay circuit is detected, it is determined that the first connecting member is attached to the relay circuit.
According to the above power supply device, it can be reliably determined that the current limiting device of the power storage device is installed.
Preferably, the power storage device further includes a switch circuit that is operated in a closed state in conjunction with the attachment of the first connecting member to the relay circuit. The control device includes a determination unit that determines whether or not the first connection member is attached to the relay circuit. The determination unit determines that the first connection member is attached to the relay circuit when the switch circuit is in the closed state.
According to another aspect of the present invention, a control method for a power supply apparatus is a control method for a power supply apparatus that supplies power to a power supply line. The power supply device is provided between a power supply provided to be able to supply power to the power supply line, a power supply line and a motor, and is connected in parallel with the power supply to the power supply line and a drive circuit that controls driving of the motor. The power storage device and an opening / closing device that electrically connects the power storage device and the power supply line when in the closed state. The power storage device includes a relay circuit arranged to be connected in series with the switchgear on a current path formed including the power supply line and the power storage device when the switchgear is in a closed state. The control method of the power supply device includes a relay circuit control step of connecting the contact points of the relay circuit via a resistance element in response to the first connecting member being attached to the relay circuit, and the power supply voltage of the power storage device is predetermined. An opening / closing control step for closing the opening / closing device in response to the first connecting member being attached to the relay circuit.
According to the control method of the power supply device described above, the current limiting device is permanently installed inside the power supply device by installing the current limiting device of the power storage device via the first connecting member configured to be detachable from the outside. Compared with the above, generation of inrush current can be prevented with a small device configuration.
Preferably, in the relay circuit control step, when the power supply voltage of the power storage device is equal to or lower than a predetermined threshold value, the contact of the relay circuit is made non-conductive in response to the removal of the second connecting member from the relay circuit. A step of connecting the contact points of the relay circuit via a resistance element in response to the first connection member being attached to the relay circuit after the second connection member is detached from the relay circuit; When the power supply voltage of the power storage device becomes substantially the same as the voltage of the power supply line in response to the device being closed, the first connection member is removed from the relay circuit and the contact between the relay circuit contacts And a step of directly connecting the contacts of the relay circuit in response to the second connecting member being attached to the relay circuit after the first connecting member is detached from the relay circuit. Including .
According to the above control method of the power supply device, when the power supply voltage of the power storage device is equal to or lower than the predetermined threshold value, the first connection member including the current limiting device is attached instead of the normal second connection member. Therefore, inrush current can be reliably prevented with a small device configuration.
Preferably, the opening / closing control step includes a determination step of determining whether or not the first connection member is attached to the relay circuit. The determination step includes a charge request detection step for detecting that a charge request for the power storage device is designated from the outside, a relay circuit detection step for detecting conduction or non-conduction between the contacts of the relay circuit, and a charge request for the power storage device. And determining that the first connecting member is attached to the relay circuit when it is detected that the connection between the contacts of the relay circuit is detected.
According to the method for controlling the power supply device described above, it can be reliably determined that the current limiting device for the power storage device is installed.
Preferably, the power storage device further includes a switch circuit that is operated in a closed state in conjunction with the attachment of the first connecting member to the relay circuit. The opening / closing control step includes a determination step of determining whether or not the first connection member is attached to the relay circuit. The determination step determines that the first connecting member is attached to the relay circuit when the switch circuit is in the closed state.
According to the present invention, in a power supply device having a power supply and a power storage device arranged to be able to supply power to the first power supply line and the second power supply line, it is possible to prevent the occurrence of an inrush current with a small device configuration.
FIG. 1 is a schematic block diagram of a motor drive device to which a power supply device according to an embodiment of the present invention is applied.
Referring to FIG. 1, the motor drive device includes a battery B, a boost converter 12, a power storage device CA, a capacitor C0, inverters 14 and 31, voltage sensors 10, 11, and 13 and current sensors 24 and 28. And system relays SRB1 to SRB3, SRC1, SRC2, a resistor R1, and a control device 30.
The engine ENG generates driving force using combustion energy of fuel such as gasoline as a source. The driving force generated by the engine ENG is divided into two paths by the power split mechanism PSD as shown by the thick oblique lines in FIG. One is a path that transmits to a drive shaft that drives a wheel via a reduction gear (not shown). The other is a path for transmission to motor generator MG1.
Although motor generators MG1 and MG2 can function both as a generator and an electric motor, as will be described below, motor generator MG1 mainly operates as a generator, and motor generator MG2 mainly operates as an electric motor.
Specifically, motor generator MG1 is a three-phase AC rotating machine, and is used as a starter that starts engine ENG during acceleration. At this time, motor generator MG1 receives the supply of electric power from battery B, drives it as an electric motor, cranks engine ENG, and starts it.
The electric power generated by motor generator MG1 is properly used depending on the operating state of the vehicle and the energy stored in power storage device CA. For example, during normal traveling or sudden acceleration, the electric power generated by motor generator MG1 becomes electric power for driving motor generator MG2 as it is. On the other hand, when the storage energy of power storage device CA is lower than a predetermined value, the power generated by motor generator MG1 is converted from AC power to DC power by inverter 14 and stored in power storage device CA.
Motor generator MG2 is a three-phase AC rotating machine, and is driven by at least one of electric power stored in power storage device CA and electric power generated by motor generator MG1. The driving force of motor generator MG2 is transmitted to the drive shaft of the wheel via the speed reducer. Thus, motor generator MG2 assists engine ENG to cause the vehicle to travel, or causes the vehicle to travel only by its own driving force.
Further, at the time of regenerative braking of the vehicle, motor generator MG2 is rotated by a wheel via a speed reducer and operates as a generator. At this time, the regenerative power generated by motor generator MG2 is charged into power storage device CA via inverter 31.
The battery B is a secondary battery such as a nickel metal hydride battery or a lithium ion battery. In addition, the battery B may be a fuel cell. The fuse element FS is arranged in series with the battery B and constitutes a circuit switching device for interrupting the high voltage circuit together with a service plug (not shown). Voltage sensor 10 detects DC voltage Vb output from battery B, and outputs the detected DC voltage Vb to control device 30.
System relay SRB 1 and resistor R 1 are connected in series between the positive electrode of battery B and boost converter 12. System relay SRB2 is connected in parallel to system relay SRB1 and resistor R1 between the positive electrode of battery B and boost converter 12. System relay SRB 3 is connected between the negative electrode of battery B and boost converter 12.
System relays SRB1 to SRB3 are turned on / off by a signal SEB from control device 30. More specifically, system relays SRB1 to SRB3 are turned on by H (logic high) level signal SEB from control device 30, and are turned off by L (logic low) level signal SEB from control device 30.
Boost converter 12 boosts DC voltage Vb supplied from battery B to a boosted voltage having an arbitrary level and supplies the boosted voltage to capacitor C0. More specifically, when boost converter 12 receives signal PWMC from control device 30, boost converter 12 supplies DC voltage Vb boosted according to signal PWMC to capacitor C0. In addition, when boost converter 12 receives signal PWMC from control device 30, boost converter 12 steps down DC voltage supplied from inverter 14 and / or inverter 31 via capacitor C 0 and charges battery B.
Power storage device CA has battery B connected in parallel to power supply line PL1 and ground line PL2. Power storage device CA includes capacitors C1 and C2 connected in series. Capacitors C1 and C2 are, for example, electric double layer capacitors. Voltage sensor 11 detects a voltage (hereinafter also referred to as an inter-terminal voltage) Vc across power storage device CA and outputs it to control device 30.
In the present invention, as will be described later, power storage device CA is electrically connected to power supply lines PL1 and PL2 via resistor R2 by mounting service plug SVP having resistor R2 therein.
System relay SRC1 is connected between power supply line PL1 and the positive electrode of capacitor C1. System relay SRC2 is connected between ground line PL2 and the negative electrode of capacitor C2. System relays SRC1 and SRC2 are turned on / off by a signal SEC from control device 30. More specifically, system relays SRC1 and SRC2 are turned on by an H level signal SEC from control device 30 and turned off by an L level signal SEC from control device 30.
Capacitor C0 smoothes the DC voltage boosted by boost converter 12, and supplies the smoothed DC voltage to inverters 14 and 31. Voltage sensor 13 detects voltage Vm across capacitor C0 (corresponding to the input voltage of inverters 14 and 31), and outputs the detected voltage Vm to control device 30.
When a DC voltage is supplied from boost converter 12 or power storage device CA via capacitor C0, inverter 14 converts the DC voltage into a three-phase AC voltage based on control signal PWMI1 from control device 30, and generates motor generator MG1. Drive. Thereby, motor generator MG1 is driven to generate torque specified by torque command value TR1.
Further, inverter 14 converts the AC voltage generated by motor generator MG1 into a DC voltage based on signal PWMI1 from control device 30 during regenerative braking of the hybrid vehicle equipped with the motor drive device, and the converted DC voltage Is supplied to power storage device CA or boost converter 12 via capacitor C0. Regenerative braking here refers to braking with regenerative power generation when the driver operating the hybrid vehicle performs a foot brake operation, or turning off the accelerator pedal while driving, although the foot brake is not operated. Including decelerating (or stopping acceleration) the vehicle while generating regenerative power.
When a DC voltage is supplied from boost converter 12 or capacitor C1 through capacitor C0, inverter 31 converts motor DC voltage into an AC voltage based on control signal PWMI2 from control device 30 to drive motor generator MG2. . Thereby, motor generator MG2 is driven so as to generate torque specified by torque command value TR2.
Inverter 31 converts the AC voltage generated by motor generator MG2 into a DC voltage based on signal PWMI2 from control device 30 during regenerative braking of a hybrid vehicle equipped with a motor drive device, and the converted DC voltage Is supplied to power storage device CA or boost converter 12 via capacitor C0.
Control device 30 receives torque command values TR1, TR2 and motor rotational speeds MRN1, MRN2 from an external ECU (Electronic Control Unit) (not shown), receives signals IG and ST from an ignition key (not shown), and an accelerator position sensor. An accelerator pedal position AP is received from (not shown) and a shift position SP is received from a shift position sensor (not shown). Signal IG and signal ST are at the H level or the L level.
Further, control device 30 receives DC voltage Vb from voltage sensor 10, receives voltage Vc between terminals of power storage device CA from voltage sensor 11, receives voltage Vm from voltage sensor 13, and receives motor current MCRT1 from current sensor 24. The motor current MCRT2 is received from the current sensor 28.
Control device 30 controls switching of an IGBT element (not shown) of inverter 14 when inverter 14 drives motor generator MG1 based on input voltage Vm of inverter 14, torque command value TR1 and motor current MCRT1. The signal PWMI1 is generated, and the generated signal PWMI1 is output to the inverter 14.
Control device 30 performs switching control of an IGBT element (not shown) of inverter 31 when inverter 31 drives motor generator MG2 based on input voltage Vm of inverter 31, torque command value TR2 and motor current MCRT2. Signal PWMI2 is generated, and the generated signal PWMI2 is output to inverter 31.
Further, when inverter 14 drives motor generator MG1, control device 30 provides an IGBT element of boost converter 12 based on DC voltage Vb of battery B, input voltage Vm of inverter 14, torque command value TR1, and motor rotational speed MRN1. A signal PWMC for switching control (not shown) is generated, and the generated signal PWMC is output to boost converter 12.
When inverter 31 drives motor generator MG2, control device 30 provides an IGBT element of boost converter 12 based on DC voltage Vb of battery B, input voltage Vm of inverter 31, torque command value TR2, and motor rotational speed MRN2. A signal PWMC for switching control (not shown) is generated, and the generated signal PWMC is output to boost converter 12.
Further, control device 30 applies a DC voltage to an AC voltage generated by motor generator MG2 based on input voltage Vm of inverter 31, torque command value TR2 and motor current MCRT2 during regenerative braking of the hybrid vehicle equipped with the motor drive device. A signal PWMI2 for converting the signal PWMI2 is generated, and the generated signal PWMI2 is output to the inverter 31.
As described above, in the motor driving device according to the present invention, the electric power necessary for driving motor generators MG1 and MG2 in the power running mode is stored in power storage device CA in addition to the electric power stored in battery B. Use the power. Further, the battery B and the power storage device CA are charged with the electric power generated when the motor generators MG1 and MG2 are driven in the regeneration mode. In particular, since a large-capacity electric double layer capacitor is employed for capacitors C1 and C2 constituting power storage device CA, electric power can be quickly supplied to motor generators MG1 and MG2, and responsiveness during motor driving can be improved. . As a result, the running performance of the vehicle can be ensured.
On the other hand, when an electric double layer capacitor is mounted on the motor drive device, it rushes due to a voltage difference between terminal voltage Vc of power storage device CA and system voltage (corresponding to voltage Vm between power supply line PL1 and ground line PL2). Current may be generated.
For example, in maintenance work of the power supply device, there is a case where the power storage device CA is inspected and maintained after discharging the electric charge remaining in the capacitors C1 and C2. This is to ensure work safety. Therefore, at the end of inspection and maintenance, both capacitors C1 and C2 are in an overdischarged state, and voltage Vc between terminals of power storage device CA is substantially zero.
Therefore, when system relays SRC1 and SRC2 are turned on after the maintenance work is completed and a normal vehicle system is started, an excessive inrush current is generated depending on the voltage difference between terminal voltage Vc of power storage device CA and system voltage Vm. There is a possibility of passing through the power storage device CA. By passing this inrush current, the capacitors C1 and C2 may be overheated and damaged. Further, the contact points may be welded in the system relays SRC1 and SRC2. Therefore, at present, there has been a problem that the vehicle system cannot be started immediately after the inspection and maintenance of the power storage device CA.
As a means for avoiding the inrush current due to overdischarge of the power storage device CA, as an example, the resistor R1 provided in series with the system relay SRB1 on the positive side of the battery B is limited, and the charge / discharge current of the power storage device CA is limited. Functioning as a current limiting device. In this configuration, by starting the vehicle system with system relays SRB1 and SRB3 turned on, the inrush current flowing into power storage device CA is limited by resistance R1.
As another example, the system relays SRC1 and SRC2 on the power storage device CA side may have the same configuration as the system relays SRB1 to SRB3 and the resistor R1 on the battery B side. According to this configuration, the inrush current is limited by the resistance provided in series with the system relay SRC1.
However, in these configurations, due to the high output density of the power storage device CA itself, a large resistor with high impedance is required, which leads to an increase in the size of the power supply device. Further, in the configuration in which the resistor is provided in the system relay on the power storage device CA side in the subsequent stage, since the system relay is added, it is inevitable that the size of the device is further increased.
Therefore, the power supply device according to the present invention is characterized in that a resistor R2 is provided inside the service plug SVP that is configured to be detachable from the outside as a current limiting device for limiting the charge / discharge current of the power storage device CA. And
According to this, as will be described later, service plug SVP constitutes a separate member from a normal safety plug provided to shut off power storage device CA from the power supply device. Then, when the residual charge of power storage device CA is substantially zero, the operator appropriately attaches to power storage device CA instead of a normal safety plug. As a result, an increase in the size of the device can be suppressed as compared with the configuration in which the current limiting device is provided inside the power supply device.
Specifically, referring to FIG. 1, the power supply device further includes a relay circuit RL1 connected in series to power storage device CA and a service plug SVP for turning on / off relay circuit RL1.
Relay circuit RL1 is disposed at an intermediate position between capacitors C1 and C2. Relay circuit RL1 becomes non-conductive when service plug SVP is removed. Thereby, power storage device CA is disconnected from power supply line PL1 and ground line PL2 at the intermediate position.
The relay circuit RL1 becomes conductive when the service plug SVP is attached. Thereby, electrical connection between power storage device CA and power supply line PL1 and ground line PL2 is ensured.
Service plug SVP includes a resistor R2 inside. As shown in FIG. 1, by installing the service plug SVP, a resistor R2 is connected between the contacts of the relay circuit RL1. Thereby, when service plug SVP is mounted, capacitors C1 and C2 are connected in series between power supply line PL1 and ground line PL2 via resistor R2. That is, resistor R2 constitutes a current limiting device of power storage device CA.
Therefore, when the capacitors C1 and C2 are in an overdischarged state due to inspection and maintenance of the power storage device CA, the inrush current is activated by starting the vehicle system with the service plug SVP having a current limiting device inside. Can be prevented.
FIG. 2 is a diagram for explaining the detailed structure of the service plug SVP in FIG. Referring to FIG. 2, service plug SVP has three plug terminals 40, 42, 44 protruding from the support member, and resistor R2.
The plug terminals 40, 42, 44 are made of a conductor. Of these, the plug terminal 40 and the plug terminal 42 are electrically connected via a resistor R2 disposed inside the support member.
In power storage device CA, socket portions 60 and 62 corresponding to plug terminals 40 and 42 and socket portion 64 corresponding to plug terminal 44 are provided on the outer surface of a housing that accommodates capacitors C1 and C2.
Socket portion 60 is electrically connected to the negative electrode of capacitor C1 inside the housing. Socket portion 62 is electrically connected to the positive electrode of capacitor C2 inside the housing. The socket parts 60 and 62 constitute a contact of the relay circuit RL1 in FIG. Therefore, by attaching service plug SVP to power storage device CA according to the method indicated by arrow LN1 in the figure, plug terminals 40 and 42 are fitted into socket portions 60 and 62, and relay circuit RL1 is closed. At this time, the resistor R2 is connected between the contacts of the relay circuit RL1.
Further, in the power storage device CA, a socket portion 64 corresponding to the plug terminal 44 is provided on the outer surface of the housing. The socket unit 64 constitutes a switch circuit provided on a signal line 66 that connects the control device 30 and the ground potential. The switch circuit conducts in response to the plug terminal 44 being fitted into the socket part 64. When the switch circuit is turned on, the control device 30 receives an H level signal ILK indicating that the signal line 66 is connected to the ground potential. In this invention, signal ILK constitutes a signal indicating that a plug is attached to power storage device CA, and becomes H level in response to attachment of either service plug SVP or safety plug SFP described later. .
As described above, by fitting the plug terminals 40, 42, 44 to the socket portions 60, 62, 64, the relay circuit RL 1 becomes conductive with the resistor R 2 interposed between the contacts, and the control device 30 has H. A level signal ILK is input.
In addition to the service plug SVP described above, the power supply device is usually provided with a safety plug SFP for electrically connecting / disconnecting the power supply line PL1, the ground line PL2, and the power storage device CA.
As shown in FIG. 2, the safety plug SFP has substantially the same shape as the service plug SVP, and includes three plug terminals 50, 52, and 54 that protrude from the support member. Among these, the plug terminals 50 and 52 are made of conductors that are electrically connected to each other. However, the resistor R2 described above is not connected between the plug terminals 50 and 52.
Therefore, by fitting the plug terminals 50, 52, 54 into the socket portions 60, 62, 64 according to the direction of the arrow LN2 in the figure, the contacts are closed and the relay circuit RL1 becomes conductive, and the control device 30 Is supplied with a signal ILK via a communication line 66.
In the above configuration, for example, when checking and maintaining power storage device CA, for example, first, residual charges of capacitors C1 and C2 are discharged in a state where safety plug SFP is attached. Then, the work is performed after the inter-terminal voltage Vc of power storage device CA is set to substantially zero. Further, after the work is completed, the safety plug SFP is removed from the socket parts 60, 62, 64 provided on the outer surface of the power storage device CA by the worker, and the service plug SVP is newly attached to the socket part 60, 62, 64.
Control device 30 receives H-level signal ILK from power storage device CA, receives signals IG and ST from the ignition key, and receives accelerator pedal position AP and shift position SP from the accelerator position sensor and shift position sensor.
Then, when control device 30 receives H level signal IG in response to the ignition key being turned on, power storage device by the operator by a method to be described later based on signal ILK, accelerator pedal position AP, and shift position SP. It is determined whether or not a capacitor charging mode designating a CA charging request is selected. At this time, if it is determined that the capacitor charging mode is selected, control device 30 permits the start of the vehicle system.
That is, control device 30 outputs signal SEB at the H level to system relays SRB1 to SRB3 on the battery B side by a method described later, and turns on system relays SRB1 to SRB3. Further, control device 30 outputs H level signal SEC to system relays SRC1 and SRC2 on power storage device CA side, and turns on system relays SRC1 and SRC2. Thereby, power storage device CA is electrically connected to power supply line PL1 and ground line PL2, and is in a state where it can accept the power supplied to power supply line PL1 and ground line PL2.
Then, when the signal ST becomes H level in response to the ignition key being rotated to the start position, the motor generator MG1 is supplied with electric power from the battery B and is driven as an electric motor to crank the engine ENG. Start. Power storage device CA is charged with DC voltage Vb boosted by boost converter 12. Further, after engine ENG is started, the electric power generated by motor generator MG1 is converted from AC power to DC power by inverter 14 and stored in power storage device CA.
On the other hand, if it is determined that the capacitor charging mode is not selected, control device 30 prohibits the start of the vehicle system. This is because an inrush current is generated by starting the vehicle system when the worker does not request charging of the power storage device CA or when the worker requests charging but the service plug SVP is not installed. The purpose is to prevent this.
FIG. 3 is a flowchart for explaining an operation of determining whether or not the capacitor charging mode is selected in control device 30 of FIG.
Referring to FIG. 3, first, in response to the ignition key being turned on (step S01), control device 30 performs a timing operation starting from the time when signal IG becomes H level (t = 0). Start (step S02).
Next, when receiving shift position SP and accelerator pedal position AP at time t (step S03), control device 30 determines whether or not each is operated to a predetermined position. The predetermined position is set in advance as a means for the operator to specify the capacitor charging mode.
Furthermore, when the shift position SP and the accelerator pedal position AP are operated to predetermined positions, the control device 30 performs a period from the time when the ignition key is turned on to the time t when the shift position SP and the accelerator pedal position AP are input. The period t is measured. Then, it is determined whether or not the measured period t is equal to or less than a predetermined threshold T1 (step S04).
If it is determined in step S04 that the period t is equal to or less than the predetermined threshold T1, that is, the shift position SP and the accelerator pedal position AP are operated to the predetermined positions within the predetermined period T1 after the ignition key is turned on. If determined, control device 30 further determines whether or not signal ILK is at the H level (step S05).
If it is determined in step S05 that signal ILK is at the H level, that is, if it is determined that a plug is attached to power storage device CA, control device 30 has selected the capacitor charging mode. Is determined (step S06).
On the other hand, when it is determined in step S04 that the period t exceeds the predetermined threshold T1, or when it is determined in step S05 that the signal ILK is at the L level, the control device 30 performs the capacitor charging mode. Is determined not to be selected.
As described above, according to the fact that the capacitor charging mode is designated by the operator's operation and the plug is mechanically attached to the power storage device CA, the control device 30 selects the capacitor charging mode. Is determined. Note that the time limit from the time when the ignition key is turned on to the input of the shift position SP and the accelerator pedal AP in the operator's operation is set because the shift position SP and the accelerator position AP are predetermined during the start of the normal vehicle system. This is to avoid erroneously determining that the capacitor charging mode has been designated due to the operation of the position.
FIG. 4 is a flowchart for illustrating a charging operation of power storage device CA according to the embodiment of the present invention.
Referring to FIG. 4, first, in response to the ignition key being turned on (step S10), control device 30 determines that voltage Vc between terminals of power storage device CA from voltage sensor 11 is equal to or lower than a predetermined reference value Vstd. It is determined whether or not (step S11). The predetermined reference value Vstd is set so as to include, for example, the inter-terminal voltage Vc (corresponding to substantially zero) when the capacitors C1 and C2 are in the overdischarge state.
When it is determined in step S11 that terminal voltage Vc is higher than predetermined reference value Vstd, control device 30 outputs H level signal SEB to system relays SRB1 to SRB3 on the battery B side, and system relay SRB1. .. SRB3 is turned on (step S21).
At this time, if the high-voltage battery B is suddenly connected to the load, a large current (inrush current) may flow instantaneously. Therefore, at the start of power supply, system relays SRB1 to SRB3 are turned on / off in a procedure that prevents an inrush current by resistor R1 provided in system relay SRB1. Specifically, first, system relay SRB1 and system relay SRB3 are turned on. Thereby, system relay SRB1 supplies the direct current from battery B to boost converter 12 via resistor R1. Subsequently, system relay SRB2 is turned on with system relays SRB1 and SRB3 being turned on. System relay SRB <b> 2 directly supplies DC current from battery B to boost converter 12. Finally, only system relay SRB1 is turned off.
Next, control device 30 outputs H level signal SEC to turn on system relays SRC1, SRC2 on power storage device CA side (step S22). When power storage device CA is connected, the motor drive device enters an RDY state in which system startup can be started (step S23), and thereafter performs normal system startup operation.
On the other hand, when it is determined in step S11 that the inter-terminal voltage Vc is equal to or lower than the predetermined reference value Vstd, the control device 30 determines whether or not the capacitor charging mode is selected (step S12). The determination operation in step S12 is executed according to steps S01 to S06 in FIG.
When it is determined in step S12 that the capacitor charging mode is selected, control device 30 outputs H level signal SEB to system relays SRB1 to SRB3, and turns on system relays SRB1 to SRB3 (step S13). . System relays SRB1 to SRB3 are turned on / off according to the same procedure as in step S19.
Next, control device 30 outputs H level signal SEC to turn on system relays SRC1 and SRC2 on power storage device CA side (step S14). Then, when the signal ST becomes H level in response to the ignition key being rotated to the start position (step S15), the vehicle system starting operation is executed (step S16).
Thus, motor generator MG1 receives the supply of electric power from battery B, drives it as an electric motor, cranks engine ENG, and starts it. Power storage device CA is charged with DC voltage Vb boosted by boost converter 12. Further, after engine ENG is started, the electric power generated by motor generator MG1 is converted from AC power to DC power by inverter 14 and stored in power storage device CA.
Control device 30 continues the charging operation of power storage device CA until the voltage difference between system voltage Vm and inter-terminal voltage Vc of power storage device CA becomes equal to or less than predetermined value V1. Finally, control device 30 confirms that the voltage difference between system voltage Vm and inter-terminal voltage Vc of power storage device CA has been reduced to a predetermined value V1 or less (step S17), and charging of power storage device CA is completed. A signal CMP indicating that it has been generated is generated and output to the display means (step S18).
When the operator knows that charging of power storage device CA is completed via the display means, the ignition key is turned off to stop the vehicle system (step S19), and the plug attached to power storage device CA is connected to service plug SVP. To a normal safety plug SFP (step S20). Specifically, the service plug SVP is removed from the socket portions 60, 62, 64 provided on the outer surface of the power storage device CA by the operator, and the safety plug SFP is newly attached to the socket portions 60, 62, 64. Fitted.
When it returns to step S12 again and it determines with the capacitor charge mode not being selected, the control apparatus 30 prohibits starting of a vehicle system. Specifically, the control device 30 turns on and outputs a diagnosis flag for instructing a system activation abnormality (step S24).
Finally, another example of the operation of determining whether or not the capacitor charging mode has been selected will be described as a modification of the embodiment of the present invention.
FIG. 5 is a diagram for describing the detailed structures of service plug SVP1, safety plug SFP1 and power storage device CA1 according to a modification of the embodiment of the present invention.
Referring to FIG. 5, service plug SVP1 has two plug terminals 40 and 42 protruding from the support member, and resistor R2.
The plug terminal 40 and the plug terminal 42 are electrically connected via a resistor R2 disposed inside the support member.
In the power storage device CA1, socket portions 60 and 62 corresponding to the plug terminals 40 and 42 and a push button type switch SW are provided on the outer surface of the housing that accommodates the capacitors C1 and C2.
Socket portion 60 is electrically connected to the negative electrode of capacitor C1 inside the housing. Socket portion 62 is electrically connected to the positive electrode of capacitor C2 inside the housing. The socket parts 60 and 62 constitute a contact point of the relay circuit RL1. Therefore, by attaching service plug SVP1 to power storage device CA according to the method indicated by arrow LN1 in the figure, plug terminals 40 and 42 are fitted into socket portions 60 and 62, and relay circuit RL1 is closed. At this time, the resistor R2 is connected between the contacts of the relay circuit RL1.
In the push button type switch SW, when the plug terminals 40 and 42 are fitted into the socket portions 60 and 62, the support member of the service plug SVP1 comes into contact with the end portion of the switch SW, and this end portion is shown by an arrow in the figure. It is operated (pushed) by moving in the direction of LN3. The switch SW is electrically connected to the control device 30A, generates a signal indicating that it has been operated, and outputs the signal to the control device 30A.
Similar to the service plug SVP1, the safety plug SFP1 has two plug terminals 50 and 52 protruding from the support member. However, the resistor R <b> 2 is not connected between the plug terminal 50 and the plug terminal 52.
Further, the safety plug SFP1 is different from the service plug SVP1 in the shape of the side surface of the support member on which the plug terminal is installed.
Specifically, when the plug terminals 50 and 52 are fitted into the socket portions 60 and 62 in the direction of the arrow LN2 in the figure, the support member of the safety plug SFP1 is provided on the outer surface of the housing of the power storage device CA. It does not contact the end of the switch SW. Therefore, the switch SW is not operated when the safety plug SFP1 is attached.
In the above configuration, for example, when checking and maintaining power storage device CA1 or the like, first, residual charges of capacitors C1 and C2 are discharged with safety plug SFP1 attached. Then, the operation is performed after the inter-terminal voltage Vc of power storage device CA1 is set to substantially zero. Further, after the work is completed, the safety plug SFP1 is removed from the socket parts 60, 62 provided on the outer surface of the power storage device CA1 by the operator, and the service plug SVP1 is newly attached to the socket parts 60, 62. Mated. At this time, the switch SW provided on the outer surface of the housing is simultaneously operated.
When control device 30A receives a signal indicating that switch SW has been operated from power storage device CA1, control device 30A determines that a capacitor charging mode that specifies a charge request for power storage device CA by the operator is selected. That is, control device 30A determines that the capacitor charging mode is selected by determining the type of plug attached to power storage device CA1. Then, in response to determining that the capacitor charging mode is selected, control device 30A permits the start of the vehicle system.
Hereinafter, a determination operation for determining whether or not the capacitor charging mode in control device 30A is selected will be described. FIG. 6 is a flowchart for illustrating the operation for determining whether or not the capacitor charging mode is selected according to the modification of the embodiment of the present invention.
Referring to FIG. 6, first, when the ignition key is turned on (step S30), control device 30A attaches service plug SVP1 based on a signal indicating that switch SW from power storage device CA1 has been operated. It is determined whether or not it has been performed (step S31).
When a signal indicating that the switch SW has been operated is input in step S31, control device 30A determines that the capacitor charging mode is selected (step S32). On the other hand, when the signal indicating that the switch SW is operated is not input, the control device 30A determines that the capacitor charging mode is not selected.
As described above, according to the embodiment of the present invention, it is possible to charge the power storage device in an overdischarged state without generating an inrush current. Further, by adopting a configuration in which the current limiting device of the power storage device is detachable from the power supply device, it is possible to reduce the size of the power supply device relative to the configuration in which the current limiting device is permanently installed inside the power supply device.
In the present embodiment, an example is shown in which the present invention is applied to a series / parallel type hybrid vehicle in which the power of the engine can be divided and transmitted to the axle and the generator by the power split mechanism. However, the present invention also applies to a series-type hybrid vehicle that uses an engine to drive a generator and generates axle driving force only by a motor that uses electric power generated by the generator, and an electric vehicle that runs only by a motor. Applicable. In any of these configurations, the axle and the motor or the generator are connected, and the regenerative energy at the time of deceleration can be collected and stored in the battery and the capacitor, so that the present invention can be applied.
The present invention can be applied to a power supply device having a power supply and a power storage device arranged to be able to supply power to the first power supply line and the second power supply line, and a method for controlling the power supply device.
1 is a schematic block diagram of a motor drive device to which a power supply device according to an embodiment of the present invention is applied. It is a figure for demonstrating the detailed structure of the service plug in FIG. 3 is a flowchart for explaining a determination operation as to whether or not a capacitor charging mode is selected in the control device of FIG. 2. It is a flowchart for demonstrating the charging operation of the electrical storage apparatus by embodiment of this invention. It is a figure for demonstrating the detailed structure of the service plug which concerns on the example of a change of embodiment of this invention, a safety plug, and an electrical storage apparatus. It is a flowchart for demonstrating the determination operation | movement of whether the capacitor charge mode by the modification of embodiment of this invention is selected.
10, 11, 13 Voltage sensor, 12 Boost converter, 14, 31 Inverter, 24, 28 Current sensor, 30, 30A Control device, 40, 42, 44, 50, 52, 54 Plug terminal, 60, 62, 64 Socket part , 66 signal line, PSD power split mechanism, B battery, CA power storage device, C1, C2 capacitor, C0 capacitor, ENG engine, PL1 power line, PL2 ground line, MG1, MG2 motor generator, R1, R2 resistance, SRB1-SRB3 , SRC1-SRC2 system relay, FS fuse element, SVP, SVP1 service plug, SFP, SFP1 safety plug.
A power source provided to supply power to the power line;
A drive circuit that is provided between the power line and the motor and that controls the drive of the motor;
A power storage device connected in parallel to the power source with respect to the power line;
An opening / closing device that electrically connects the power storage device and the power supply line in a closed state;
A control device for controlling the opening and closing operation of the opening and closing device,
A relay circuit arranged to be connected in series with the switchgear on a current path formed including the power line and the power storage device when the switchgear is in a closed state;
The relay circuit is configured to be detachable from the outside and connects the contact points of the relay circuit via a resistance element in response to being attached to the relay circuit, while the relay circuit is in response to being detached from the relay circuit. A first connecting member that makes non-conduction between the contact points of
When the power supply voltage of the power storage device is equal to or lower than a predetermined threshold, the control device closes the switchgear in response to the first connecting member being attached to the relay circuit. apparatus.
The power storage device is configured to be detachable from the outside, and connects directly between the contacts of the relay circuit in response to being attached to the relay circuit, while in response to being detached from the relay circuit. A second connection member for non-conducting between the contacts of the relay circuit;
The first connecting member is attached to the relay circuit after the second connecting member is detached from the relay circuit when the power supply voltage of the power storage device is equal to or lower than the predetermined threshold value.
When the power supply voltage of the power storage device becomes substantially the same as the voltage of the power supply line in response to the closing of the switchgear, the first connection member is connected to the relay circuit. The power supply device according to claim 1, wherein the power supply device is attached to the relay circuit after being detached from the relay.
The control device includes a determination unit that determines whether or not the first connection member is attached to the relay circuit,
A charge request detection unit for detecting that a charge request for the power storage device is designated from the outside;
A relay circuit detection unit for detecting conduction or non-conduction between the contacts of the relay circuit,
When it is detected that a charge request for the power storage device is specified, and when conduction between the contacts of the relay circuit is detected, it is determined that the first connection member is attached to the relay circuit; The power supply device according to claim 2.
The power storage device further includes a switch circuit that is operated in a closed state in conjunction with the first connecting member being attached to the relay circuit,
The power supply apparatus according to claim 2, wherein the determination unit determines that the first connection member is attached to the relay circuit when the switch circuit is in a closed state.
A method of controlling a power supply device that supplies power to a power line,
An open / close device that electrically connects the power storage device and the power line when in a closed state;
The power storage device includes a relay circuit arranged to be connected in series with the switchgear on a current path formed including the power line and the power storage device when the switchgear is closed. Including
The method for controlling the power supply device includes:
A relay circuit control step of connecting between the contacts of the relay circuit via a resistance element in response to the first connecting member being mounted on the relay circuit;
An open / close control step for closing the open / close device when the first connection member is attached to the relay circuit when the power supply voltage of the power storage device is equal to or lower than a predetermined threshold; Control method of power supply.
The relay circuit control step includes
When the power supply voltage of the power storage device is equal to or lower than the predetermined threshold, in response to the second connecting member being detached from the relay circuit, non-conducting between the contacts of the relay circuit;
Connecting the contact points of the relay circuit via the resistance element in response to the first connection member being attached to the relay circuit after the second connection member is detached from the relay circuit; When,
When the power supply voltage of the power storage device becomes substantially the same as the voltage of the power supply line in response to closing the switchgear, the first connection member is detached from the relay circuit. A step of non-conducting between the contacts of the relay circuit;
Directly connecting between the contact points of the relay circuit in response to the second connection member being attached to the relay circuit after the first connection member is detached from the relay circuit. The control method of the power supply device according to claim 5.
The opening / closing control step includes a determination step of determining whether or not the first connecting member is attached to the relay circuit,
A charge request detecting step for detecting that a charge request for the power storage device is designated from the outside;
A relay circuit detection step for detecting conduction or non-conduction between the contacts of the relay circuit;
A step of determining that the first connection member is attached to the relay circuit when it is detected that a charge request for the power storage device is designated and continuity between contacts of the relay circuit is detected. The control method of the power supply device of Claim 6 containing these.
The method according to claim 6, wherein the determining step determines that the first connecting member is attached to the relay circuit when the switch circuit is in a closed state.
JP2006112408A 2006-04-14 2006-04-14 Power supply device and control method of power supply device Active JP4702155B2 (en)
JP2006112408A JP4702155B2 (en) 2006-04-14 2006-04-14 Power supply device and control method of power supply device
US12/224,342 US7816804B2 (en) 2006-04-14 2007-04-12 Power supply device and control method of the power supply device
PCT/JP2007/058481 WO2007119874A1 (en) 2006-04-14 2007-04-12 Power supply device and power supply device control method
CN200780013223XA CN101421897B (en) 2006-04-14 2007-04-12 Power supply device and power supply device control method
KR1020087027468A KR101046356B1 (en) 2006-04-14 2007-04-12 Power Supply and Control Method
EP07741917.4A EP2009759B1 (en) 2006-04-14 2007-04-12 Power supply device and power supply device control method
JP2007288899A true JP2007288899A (en) 2007-11-01
JP4702155B2 JP4702155B2 (en) 2011-06-15
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JP2006112408A Active JP4702155B2 (en) 2006-04-14 2006-04-14 Power supply device and control method of power supply device
US (1) US7816804B2 (en)
EP (1) EP2009759B1 (en)
JP (1) JP4702155B2 (en)
KR (1) KR101046356B1 (en)
CN (1) CN101421897B (en)
WO (1) WO2007119874A1 (en)
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KR20080110665A (en) 2008-12-18
KR101046356B1 (en) 2011-07-05
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