Vehicle Battery Charging Control Device

Abstract

To provide a vehicle battery charging control device capable of preventing a time until external charging starts from becoming longer while enabling supplementary charging and external charging.SOLUTION: When a supplementary charging termination condition is established, information erasure control and update control are carried out. When the supplementary charging termination condition is established in a state where an external charging start condition is not established, after the elapse of a predetermined reference time from the end of the information erasure control, SOC reception control for performing CAN communication with a SOC calculation device and receiving information on a battery SOC from the SOC calculation device is carried out. When the supplementary charging termination condition is established along with establishment of the external charging start condition, external charging start control is started after execution of stop control and before the elapse of the reference time from the end of the information erasure control.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a battery charging control device for a vehicle, which is connected to a power supply device having a motor as a drive source, a high-voltage battery that supplies power to the motor, a low-voltage battery having an output voltage lower than that of the high-voltage battery, and a charger provided outside the vehicle, and realizes external charging for charging the high-voltage battery by the power supply device.

Background Art

[0002] Conventionally, in a vehicle equipped with a motor as a drive source, a high-voltage battery and a low-voltage battery having an output voltage lower than that of the high-voltage battery are mounted, the high-voltage battery supplies power to the motor, and the low-voltage battery supplies power to devices such as a controller and an audio. For example, Patent Document 1 discloses a vehicle including a motor generator as a drive source, a high-voltage battery (main battery in Patent Document 1) that supplies power to the motor generator, and a low-voltage battery (auxiliary battery in Patent Document 1) having an output voltage lower than that of the high-voltage battery, and configured to charge the low-voltage battery with the high-voltage battery at regular intervals after the ignition switch is turned off.

[0003] Further, conventionally, in a part of a vehicle including a motor as a drive source and a high-voltage battery that supplies power to the motor, external charging for charging the high-voltage battery by a power supply device outside the vehicle using a charger outside the vehicle has been made possible.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a vehicle equipped with a motor as a drive source, a high-voltage battery, and a low-voltage battery, if both supplementary charging to charge the low-voltage battery with the high-voltage battery and the above-described external charging are enabled, the charge amounts of both the high-voltage battery and the low-voltage battery can be ensured.

[0006] However, if simply constructing a control sequence for supplementary charging and a control sequence for external charging and configuring them to be executed, when a condition for starting external charging is satisfied during the execution of supplementary charging, the control sequence for supplementary charging and the control sequence for external charging may interfere, and there is a risk that supplementary charging or external charging may not be appropriately performed. Therefore, when a condition for starting external charging is satisfied during the execution of supplementary charging, it is desirable to first end the supplementary charging and then start the external charging. On the other hand, if the time from when a condition for starting external charging is satisfied by the user operating a charger outside the vehicle until the external charging starts becomes long, the user may feel discomfort. Therefore, when a condition for starting external charging is satisfied during the execution of supplementary charging, while ending the supplementary charging and then starting the external charging, it is desired to prevent the time until the external charging starts from becoming long.

[0007] The present invention has been made in view of the above circumstances, and an object thereof is to provide a battery charging control device for a vehicle that enables supplementary charging and external charging and can prevent the time until the external charging starts from becoming long.

Means for Solving the Problem

[0008] In view of the above problems, the inventors of the present application focused on the reset process for resetting the control device. Specifically, it is desirable that the information (signals) held by the control device be reset as appropriate. That is, it is desired to cause the control device to erase the information (signals) it holds and then, as appropriate, perform a process of recomputing (regenerating) or reacquiring at least some of the information. And the timing immediately after the completion of the replenishment charging is suitable for performing this reset process. However, when the external charging start condition for starting external charging during the replenishment charging is satisfied, if the replenishment charging is stopped and the external charging is started after waiting for the above-described reset process to be completed, it has been found that the start of the external charging is delayed. Based on the above findings, the inventors of the present application have invented the following as a battery charging control device for a vehicle.

[0009] That is, the present invention is connected to a power supply device having a motor as a drive source, a high-voltage battery that supplies power to the motor, a low-voltage battery having an output voltage lower than that of the high-voltage battery, and a charger provided outside the vehicle, and the high-voltage battery is charged by the power supply device to realize external charging. In the battery charging control device of a vehicle including a charging connection device, a supplementary charging device that performs supplementary charging for charging the low-voltage battery with the output power of the high-voltage battery, an SOC calculation device that calculates the battery SOC which is the SOC of the high-voltage battery, and a control device that controls each device including the supplementary charging device and is capable of CAN communication with the charger and the SOC calculation device. The control device determines whether or not an external charging start condition, which is a condition for starting the external charging, is satisfied, and when the external charging start condition is satisfied during the supplementary charging or another predetermined condition is satisfied, it determines that a supplementary charging end condition, which is a condition for ending the supplementary charging, is satisfied. A determination unit; when it is determined by the determination unit that the supplementary charging end condition is satisfied, a stop control for stopping the supplementary charging device, an information erasure control for erasing a plurality of information including a signal for realizing CAN communication between the control device and the CAN communication device after the end of the stop control, and an update control for updating at least a part of the erased information. A supplementary charging control unit that performs; when it is determined by the determination unit that the external charging start condition is satisfied, an external charging control unit that performs external charging start control for starting the external charging by communicating with the charger via CAN and issuing a command to start the external charging to the charger is provided. When the supplementary charging end condition is satisfied in a state where the external charging start condition is not satisfied, the supplementary charging control unit performs SOC reception control for communicating with the SOC calculation device via CAN and receiving the battery SOC information from the SOC calculation device after a predetermined reference time has elapsed after the information erasure control ends. When the supplementary charging end condition is satisfied as the external charging start condition is satisfied, the external charging control unit starts the external charging start control after the stop control is performed and before the reference time elapses after the information erasure control ends. (Claim 1).

[0010] According to the present invention, when the external charging start condition is satisfied, it is determined that the supplementary charging end condition is satisfied, and after the stop control for stopping the supplementary charging device, the external charging start control for starting the external charging is started. Therefore, it is possible to suppress interference between the control sequence for performing the supplementary charging and the control sequence for starting the external charging.

[0011] In addition, since the above-described information erasure control and update control are performed when the supplementary charging end condition is satisfied, an opportunity to reset the control device can be ensured.

[0012] Furthermore, when the supplementary charging end condition is satisfied while the external charging start condition is not satisfied, the above-described SOC reception control is performed after the supplementary charging device stops. Therefore, it is possible to cause the control device to acquire the information on the battery SOC after it has decreased due to the performance of the supplementary charging. Moreover, by performing the SOC reception control after a predetermined reference time has elapsed after the stop control and the information erasure process are completed, it is possible to reliably perform CAN communication between the control device and the SOC calculation device, and it is possible to reliably calculate the battery SOC after the supplementary charging is completed in the SOC calculation device. Therefore, it is possible to reliably cause the control device to acquire the latest battery SOC after the supplementary charging is completed.

[0013] However, even when the external charging start condition is satisfied during the supplementary charging and accordingly the supplementary charging end condition is satisfied, if the external charging start control is started after waiting for the reference time to elapse after the stop control and the information erasure process are completed, the start time of the external charging will be delayed. In contrast, in the present invention, in this case, the external charging start control is started before the reference time elapses after the information erasure process is completed. That is, the control for starting the external charging is performed without waiting for the resumption of CAN communication between the device other than the charger and the control device and the completion of the update of various information. Therefore, even when the external charging start condition is satisfied during the supplementary charging and accordingly the supplementary charging end condition is satisfied, it is possible to prevent the time from when the external charging start condition is satisfied until the external charging is started from becoming long while resetting the control device.

[0014] In the above configuration, preferably, a temporary storage device capable of storing information regarding the replenishment charging device only during the operation of the replenishment charging device, a storage device capable of storing information related to the replenishment charging device both during and after the operation of the replenishment charging device, and a writing processing device that performs a writing process of writing the information stored in the temporary storage device into the storage device are provided, and when the replenishment charging end condition is satisfied, the replenishment charging control unit causes the writing processing device to perform the writing process before the stop control is performed (Claim 2).

[0015] According to this configuration, information related to the replenishment charging device can be continuously stored in the storage device even after the replenishment charging device stops. However, when the external charging start condition is satisfied during the replenishment charging and the replenishment charging end condition is satisfied accordingly, the start time of the external charging is delayed by the time of the above writing process. In contrast, in the present invention, as described above, in this case, the external charging start control is performed before the reference time elapses after the information erasure process is completed, thereby suppressing the delay in the start time of the external charging. Therefore, even when the external charging start condition is satisfied during the replenishment charging and the replenishment charging end condition is satisfied accordingly, it is possible to prevent the start time of the external charging from being excessively delayed while performing the above writing process.

[0016] In the above configuration, preferably, a disconnection / connection device capable of disconnecting / connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery, and a forced opening command output device capable of outputting a forced opening command, which is a command for forcibly opening the disconnection / connection device, are provided, and the replenishment charging control unit determines whether or not the forced opening command is output from the forced opening command output device when the update control is performed (Claim 3).

[0017] According to this configuration, it is possible to determine whether or not a forced opening command can be output, that is, whether or not it is possible to forcibly open the disconnection / connection device to forcibly cut off the electrical connection between the high-voltage circuit and the high-voltage battery, using the end timing of the replenishment charging.

[0018] In the above configuration, preferably, a disconnecting and connecting device capable of disconnecting and connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery is provided. When the charging completion condition is satisfied, the charging control unit opens the disconnecting and connecting device before implementing the stop control. When the external charging start condition is satisfied, the external charging control unit closes the disconnecting and connecting device and starts the charging device to start the charging. When the external charging start condition is satisfied during the charging, after the disconnecting and connecting device is opened by the charging control unit and after the stop control is implemented, the disconnecting and connecting device is closed and the charging device is started (Claim 4).

[0019] In this configuration, when the external charging start condition is satisfied, the disconnecting and connecting device is closed and the charging device is started to start the charging. That is, charging is also performed during external charging. Therefore, it is possible to ensure the charge amounts of both the high-voltage battery and the low-voltage battery more reliably.

[0020] Also, according to this configuration, when the external charging start condition is satisfied during the charging, after the disconnecting and connecting device is opened and the charging device is stopped, the disconnecting and connecting device is closed and the charging device is started. Therefore, it is possible to prevent interference between the control of opening the disconnecting and connecting device and stopping the charging device performed when the charging ends and the control of closing the disconnecting and connecting device and starting the charging device performed when the external charging starts.

Effects of the Invention

[0021] As described above, according to the battery charging control device for a vehicle of the present invention, while enabling charging and external charging, it is possible to suppress an increase in the time until external charging is started.

Brief Description of the Drawings

[0022]

Figure 1

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Figure 11

Embodiments for Carrying Out the Invention

[0023] (Overall Configuration of Vehicle) A battery charge control device for a vehicle according to an embodiment of the present invention will be described. FIG. 1 is a diagram schematically showing the configuration of a vehicle 1 equipped with a battery charge control device 100 according to this embodiment. The vehicle 1 is, for example, a four-wheel automobile.

[0024] Vehicle 1 (battery charging control device 100) includes a high-voltage battery 2, a low-voltage battery 3 with an output voltage lower than that of the high-voltage battery 2, a high-voltage circuit 30 having a plurality of electrical devices and electrically connected to the high-voltage battery 2, and a charging connection device 50. Further, vehicle 1 has a plurality of controllers including a microprocessor or the like for controlling each part of vehicle 1.

[0025] (Battery) In this embodiment, a Li battery (lithium battery) is mounted on vehicle 1 as the high-voltage battery 2. For example, the high-voltage battery 2 includes a plurality of battery modules each composed of 12 battery cells connected in 2 parallel × 6 series, and these battery modules are connected in series. Also, in this embodiment, a lead battery is mounted on vehicle 1 as the low-voltage battery 3. For example, the nominal voltage of the high-voltage battery 2 is 24V, and the nominal voltage of the low-voltage battery 3 is 12V.

[0026] Detection devices such as a battery current sensor SN1 for detecting the current of the high-voltage battery 2 and a battery temperature sensor SN2 for detecting the temperature of the high-voltage battery 2 are provided on the high-voltage battery 2. Although not shown in the figure, a battery heater for raising the temperature of the battery module is provided on the high-voltage battery 2.

[0027] (High-voltage circuit) The high-voltage circuit 30 includes, as electrical devices, a motor 4, a generator 5, an inverter 6, a converter 7, a DC / DC converter 8, a PTC heater 9, an electric compressor 10, etc. Further, the high-voltage circuit 30 includes a high-voltage line 31 for connecting these electrical devices.

[0028] The inverter 6, converter 7, DC / DC converter 8, PTC heater 9, and electric compressor 10 are each connected to the high-voltage line 31. The motor 4 is connected to the high-voltage line 31 via the inverter 6. The generator 5 is connected to the high-voltage line 31 via the converter 7.

[0029] The motor 4 rotates upon receiving power supply from the high-voltage battery 2. The motor 4 is mounted on the vehicle 1 as a drive source of the vehicle 1, and the output of the motor 4 is transmitted to wheels (not shown) via the driving force transmission device 12.

[0030] The generator 5 is a power generation device for charging the high-voltage battery 2. The vehicle 1 of the present embodiment is a series hybrid vehicle. That is, the vehicle 1 is equipped with an engine 22 that drives the generator 5, and the generator 5 is rotationally driven by the engine 22 to generate electricity, and the electricity generated by the generator 5 is supplied to the high-voltage battery 2. The engine 22 is, for example, a rotary engine. Note that the generator 5 is also connected to the wheels via the driving force transmission device 12, and the vehicle 1 can regenerate the energy during its deceleration.

[0031] The inverter 6 is a device that converts a direct current into an alternating current, and converts the direct current from the high-voltage battery 2 into an alternating current and supplies it to the motor 4. The converter 7 is a device that converts an alternating current into a direct current, and converts the alternating current generated by the generator 5 into a direct current and supplies it to the high-voltage battery 2.

[0032] The DC / DC converter 8 is a device that steps down the input power and outputs it. In the vehicle 1, it is possible to perform supplementary charging to charge the low-voltage battery 3 with the output voltage of the high-voltage battery 2, and the DC / DC converter 8 is incorporated into the high-voltage circuit 30 so that it can step down the output voltage of the high-voltage battery 2 and supply it to the low-voltage battery 3.

[0033] The PTC heater 9 and the electric compressor 10 constitute the air conditioning device 11 of the vehicle 1. Specifically, the PTC heater 9 is a device for heating the interior of the vehicle 1, and the electric compressor 10 is a device for cooling the interior of the vehicle 1. Note that in the present embodiment, a cooling plate (not shown) for cooling the high-voltage battery 2 is provided, and the electric compressor 10 also cools this cooling plate.

[0034] (Main contactor) A pair of main contactors 71, 71 are provided between the high-voltage battery 2 and the high-voltage circuit 30. The main contactors 71, 71 are contactors, that is, electromagnetic switches including electromagnets, and are devices that disconnect and connect the electrical connection between two contacts according to the supplied power. When the contactor is closed, the two contacts are electrically connected and energized, and when the contactor is opened, the two contacts are electrically disconnected and de-energized. The main contactors 71, 71 disconnect and connect the electrical connection between the high-voltage battery 2 and the high-voltage circuit 30. Specifically, one main contactor 71 disconnects and connects the electrical connection between the positive electrode side line of the high-voltage battery 2 and the positive electrode side line of the high-voltage circuit 30, and the other main contactor 71 disconnects and connects the electrical connection between the negative electrode side line of the high-voltage battery 2 and the negative electrode side line of the high-voltage circuit 30. The main contactors 71, 71 correspond to the "disconnection and connection device" in the claims.

[0035] (Charging connection device) The charging connection device 50 is a device that electrically connects the power supply device 310 and the high-voltage battery 2 by being connected to the power supply device 310 having a charger 312 provided outside the vehicle. By electrically connecting the power supply device 310 and the high-voltage battery 2 via the charging connection device 50, external charging for charging the high-voltage battery 2 by the power supply device 310 is realized. The start / stop of external charging, that is, the switching of the output / stop of the power from the power supply device 310 to the high-voltage battery 2 and the adjustment of the current output from the power supply device 310 to the high-voltage battery 2, etc., are performed by the charger 312 of the power supply device 310. In this embodiment, the power supply device 310 is a DC power supply. Hereinafter, the charging connection device 50 is referred to as a DC charging connection device 50, the power supply device 310 to which it is connected is referred to as a DC power supply device 310, and the charger of the DC power supply device 310 is referred to as a DC charger 312.

[0036] The DC charging connection device 50 is configured to fit with a connector (hereinafter referred to as the DC connector) provided at the end of a cable connected to the DC charger 312 (DC power supply device 310). Through this fitting, the DC charger 312 (DC power supply device 310) and the high-voltage battery 2 are electrically connected.

[0037] The DC charging connection device 50 is connected to the DC charger 312 (DC power supply device 310) by a power line and is also connected by the CAN - BUS. The DC charging connection device 50 is connected to the C - BCM200 described later by the CAN - BUS. Through the fitting of the DC charging connection device 50 and the DC connector, the C - BCM200 and the DC charger 312 (DC power supply device 310) are connected so as to be CAN - communicable.

[0038] Between the DC charging connection device 50 and the high - voltage circuit 30, QBC contacts 73, 73, which are contacts for disconnecting and connecting these electrical connections, are provided. The DC charging connection device 50 is electrically connected to the high - voltage battery 2 via the QBC contacts 73, 73, the high - voltage circuit 30, and the main contacts 71, 71. One of the QBC contacts 73 disconnects and connects the electrical connection between the positive - side line of the high - voltage circuit 30 and the positive - side line of the DC charging connection device 50, and the other QBC contact 73 disconnects and connects the electrical connection between the negative - side line of the high - voltage circuit 30 and the negative - side line of the DC charging connection device 50.

[0039] (Controller) FIG. 2 is a block diagram showing the relationship between the controllers mounted on the vehicle 1. In the vehicle 1, as controllers, there are mounted a C-BCM (Center-Body Control Module) 200, a PCM (Power Control Module) 201, an ECM (Engine Control Module) 202, a DMCM (Driver Moor Control Module) 203, an SGCM (Starter Generator Control Module) 204, a BECM (Battery Energy Control Module) 205, an ESU (Electric Supply Unit) 206, and a DC / DC control unit 207. Further, in the vehicle 1, there is mounted an HMI device (HMI: Human Machine Interface) 210 which is a device including a display and performing display of various information and the like. The above PCM 201 corresponds to the "control device" in the claims.

[0040] The C-BCM 200 mainly controls doors and windows. The PCM 201 mainly controls the devices of the drive system of the vehicle 1. The ECM 202 mainly controls the engine 22. The DMCM 203 controls the inverter 6. The SGCM 204 controls the converter 7. The ESU 206 controls the air conditioner 11.

[0041] The DC / DC control unit 207 controls the DC / DC converter 8. The DC / DC converter 8 and the DC / DC control unit 207 that controls it constitute a charging device 20 that realizes a supplementary charge for charging the low-voltage battery 3 with the output voltage of the high-voltage battery 2.

[0042] The BECM205 performs various calculations related to the high-voltage battery 2. Specifically, the BECM205 calculates the SOC of the high-voltage battery 2. In detail, the BECM205 calculates an initial value of the SOC of the high-voltage battery 2 based on the detected values of the battery current sensor SN1 and the battery temperature sensor SN2 in a state where the main contacts 71, 71 are open. Then, the BECM205 updates the battery SOC by integrating the increase or decrease amount of the battery SOC per unit time calculated based on the detected values with respect to this initial value. Also, the BECM205 performs failure determination of the high-voltage battery 2, the battery current sensor SN1, and the battery temperature sensor SN2. The BECM205 corresponds to the "SOC calculation device" in the claims.

[0043] Each of the controllers 200 to 207 operates by receiving power from the low-voltage battery 3. Also, the controllers 200 to 207 are connected by a CAN-BUS so that they can communicate with each other via CAN (Controller Area Network).

[0044] As shown in FIG. 3 to be described later, at least the DC / DC control unit 207 among the controllers has a CPU (Central Processing Unit) 207A, a volatile memory 207B that can store information only while power is being supplied, that is, only during the operation of the charging device 20 including the DC / DC control unit 207, and a non-volatile memory 207C that can continuously store information both during and after the power supply is stopped, that is, during and after the operation of the charging device 20 including the DC / DC control unit 207. In the present embodiment, the CPU 207A of the DC / DC control unit 207 corresponds to the "writing processing device" in the claims, the volatile memory 207B corresponds to the "temporary storage device" in the claims, and the non-volatile memory 207C corresponds to the "storage device" in the claims.

[0045] (Charge control) The control related to external charging and supplementary charging is mainly carried out by the PCM201. FIG. 3 is a control block diagram related to these controls. The PCM201 functionally includes a determination unit 211, an external charging control unit 212, and a supplementary charging control unit 213. The determination unit 211 determines the success or failure of the external charging start condition, which is the condition for starting external charging, and the supplementary charging end condition, which is the condition for ending supplementary charging. The external charging control unit 212 performs external charging start control for starting external charging. The supplementary charging control unit 213 performs supplementary charging end control for ending supplementary charging.

[0046] As shown in FIG. 3, the PCM201 is electrically connected to the DC charging connection device 50, and a signal is input to the PCM201 from the DC charging connection device 50. Also, by means of CAN communication, values detected by the battery SOC calculated by the BECM205 in the BECM205, the battery current sensor SN1 and the battery temperature sensor SN2 input to the BECM205, etc. are input to the PCM201.

[0047] The PCM201 is electrically connected to the main contacts 71, 71 and the QBC contacts 73, 73 respectively, and opens and closes them. Specifically, the PCM201 opens and closes these contacts 71, 73 by switching the supply and stop of power from the low-voltage battery 3 to each contact 71, 73.

[0048] The PCM201 is electrically connected to the supplementary charging device 20, and switches the startup (operation) / stop of the supplementary charging device 20 (DC / DC control unit 207 and DC / DC converter 8). Specifically, the supplementary charging device 20 is configured to start (operate) when power is supplied from the low-voltage battery 3, and the PCM201 switches the supply and stop of power from the low-voltage battery 3 to the supplementary charging device 20.

[0049] The PCM201 communicates with the DC charger 312 via CAN through the C-BCM200 and the DC charging connection device 50. Also, as shown in FIG. 2, the PCM201 also communicates with the ECM202, DMCM203, SGCM204, BECM205, and the DC / DC control unit 207 (charging device 20) via CAN. That is, these C-BCM200, DC charger 312, and PCM201, and the ECM202, DMCM203, SGCM204, BECM205, and DC / DC control unit 207 (charging device 20) are CAN communication devices that communicate with the PCM201 via CAN.

[0050] (External charging start control and charging end control) After the start of charging, when a request to drive the PTC heater 9 is issued because the low-voltage battery 3 is fully charged, or when a request to drive the battery heater is issued, the PCM201 determines that the charging end condition, which is a condition for ending the charging, is satisfied. Also, during the charging operation, when the external charging start condition is satisfied, the PCM201 determines that the charging end condition is satisfied. Then, the PCM201 performs different controls depending on whether the external charging start condition is satisfied during the charging operation, whether the external charging start condition is satisfied when charging is not being performed, and whether the charging end condition is satisfied when the external charging start condition is not satisfied. FIG. 4 is a flowchart showing the switching procedure of these control patterns. The above conditions of the low-voltage battery 3 being fully charged, a request to drive the PTC heater 9 being issued, or a request to drive the battery heater being issued correspond to the "other predetermined conditions" in the claims.

[0051] (External charging start control: When charging is not being performed) This is the control that is executed when the external charging start condition is satisfied while the supplementary charging is not being performed, that is, the external charging start control in the state where the supplementary charging is not being performed. Specifically, in the flowchart of FIG. 4, when the PCM 201 determines that the supplementary charging is not in progress (the determination in step S101 is NO) and determines that the external charging start condition is satisfied (the determination in step S102 is YES), the control in this case will be described. FIG. 6 is a flowchart showing the control content of the PCM 201 (following 1 in FIG. 4) when the external charging start condition is satisfied while the supplementary charging is not being performed. FIG. 7 is a diagram showing the control content of each controller when the external charging start condition is satisfied while the supplementary charging is not being performed. Here, as shown in FIG. 7, the PCM 201 determines that the external charging start condition is satisfied when it receives a charging start signal from the DC charging connection device 50. The charging start signal is transmitted from the DC charging connection device 50 to the PCM 201 when the DC charging connection device 50 and the DC connector are engaged.

[0052] When the external charging start condition is satisfied in the state where the supplementary charging is not being performed, the PCM 201 first generates a CAN request signal, which is a signal for realizing CAN communication with the DC charger 312, in order to start CAN communication with the DC charger 312, and transmits this to the DC charger 312 (step S2). As shown in FIG. 6, when the CAN request signal is transmitted from the PCM 201 to the DC charger 312, the DC charger 312 receives it. Thereby, CAN communication via the C-BCM 200 and the DC charging connection device 50 is started between the PCM 201 and the DC charger 312.

[0053] When the CAN communication between the PCM 201 and the DC charger 312 is started, the PCM 201 transmits external charging pre-information, which is information for more appropriately performing external charging, to the DC charger 312 by CAN communication (step S3).

[0054] Specifically, based on the battery SOC received from the BECM205 and the detected values of the battery current sensor SN1 and the battery temperature sensor SN2, the PCM201 calculates the maximum charging time, which is the maximum value of the time required to fully charge the high-voltage battery 2. Then, information such as this maximum charging time and the temperature of the high-voltage battery 2 is transmitted to the DC charger 312. When receiving the pre-external charging information, the DC charger 312 adjusts the power output to the high-voltage battery 2 based on this information. For example, when the maximum charging time has elapsed since the start of power output, the power output is stopped, and when the temperature of the high-voltage battery 2 detected by the battery temperature sensor SN2 is high, the output current is decreased.

[0055] After step S3, the PCM201 closes each contactor (step S4). Specifically, the PCM201 closes the main contactors 71, 71 and the QBC contactors 73, 73. Thereby, the high-voltage battery 2 and the high-voltage circuit 30 are electrically connected, and the high-voltage battery 2 and the DC charger 312 are electrically connected via the high-voltage circuit 30.

[0056] In the vehicle 1 of this embodiment, supplementary charging is performed during external charging. Therefore, after step S4, the PCM201 activates the supplementary charging device 20 and starts its operation (step S5). Specifically, the PCM201 starts supplying power from the low-voltage battery 3 to the DC / DC converter 8 to activate the DC / DC converter 8 so that power is input thereto. Also, the PCM201 starts supplying power from the low-voltage battery 3 to the DC / DC control unit 207 to activate it.

[0057] As shown in FIG. 6, when the activation of the supplementary charging device 20 is completed, an activation completion signal is transmitted from the supplementary charging device 20 to the PCM201. The PCM201 waits for this activation completion signal to be input (waits for the determination in step S6 to become YES), and then performs the next step S7.

[0058] In step S7, the PCM 201 issues a command to start external charging to the DC charger 312 to start external charging (to permit power output from the DC power supply device 310 to the vehicle 1 side), and ends the external charging start control. Specifically, as shown in FIG. 6, the PCM 201 transmits a charging start signal to the DC charger 312. When the DC charger 312 receives the charging start signal from the PCM 201, it starts power supply from the DC power supply device 310 to the high-voltage battery 2.

[0059] (Recharge end control: when external charging start condition is not satisfied) Next, the control that is executed when the recharge end condition is satisfied while the external charging start condition is not satisfied, that is, the recharge end control when the recharge end condition is satisfied without the external charging start condition being satisfied, will be described. That is, in the flowchart of FIG. 4, when the PCM 201 determines that charging is in progress (the determination in step S101 is YES), determines that the external charging start condition is not satisfied (the determination in step S103 is NO), and determines that the recharge end condition is satisfied due to a factor other than external charging start (the determination in step S105 is YES), the control in this case will be described. FIG. 7 is a flowchart showing the control content of the PCM 201 (subsequent to 2 in FIG. 4) when the recharge end condition is satisfied while the external charging start condition is not satisfied. FIG. 8 is a diagram showing the control content of each controller when the recharge end condition is satisfied while the external charging start condition is not satisfied.

[0060] When the recharge end condition is satisfied while the external charging start condition is not satisfied, the PCM 201 first opens the main contacts 71, 71 (step S22). That is, during the execution of charging, the main contacts 71, 71 are closed, and in step S22, the main contacts 71, 71 are switched from the closed state to the open state.

[0061] Next, the PCM 201 transmits a cutoff request signal to the charging device 20 to stop the charging device 20 (step S23).

[0062] As shown in FIG. 8, when receiving a cutoff request signal (step Q21), the charging device 20 performs a writing process of writing various information stored in the volatile memory 207B to the non-volatile memory 207C for storage (step Q22).

[0063] For example, when the CPU 207A of the charging device 20 is during the running of the vehicle 1 or during charging and the charging device 20 is operating (when receiving power supply), it determines whether each part of the charging device 20 such as the DC / DC converter 8 is faulty and stores the determination result in the volatile memory 207B. When the CPU 207A of the charging device 20 receives a cutoff request signal from the PCM 201, it writes the information about the charging device 20 including the above determination result stored in the volatile memory 207B to the non-volatile memory 207C.

[0064] After finishing the above writing process, the charging device 20 (CPU 207A) sends a cutoff permission signal that permits the stop of the charging device 20 to the PCM 201 (step Q23).

[0065] Returning to FIG. 7, the PCM 201 waits for a cutoff permission signal to be input from the charging device 20 (waits for the determination in step S24 to become YES), and then proceeds to the next step S25.

[0066] In step S25, the PCM 201 stops the charging device 20. Specifically, the PCM 201 stops the power supply from the low-voltage battery 3 to the charging device 20 (the DC / DC control unit 207 and the DC / DC converter 8).

[0067] After step S25, the PCM 201 starts post-charging stop processing (step S26).

[0068] The post-charging stop process includes a process of resetting a part of the PCM 201. That is, as shown in FIG. 8, the post-charging stop process includes an information erasure process (information erasure control, step S26A) of erasing a part of the information (signals) generated by the PCM 201 through its own calculations or obtained from other controllers, etc., and a recalculation / retrieval process (update control, step S26B) of recalculating (regenerating) or retrieving at least a part of the erased information and updating it.

[0069] In the above information erasure process, the PCM 201 erases at least the following two pieces of information. (1) The PCM 201 erases the information (signals) that it has transmitted to the CAN communication device to realize CAN communication. (2) The PCM 201 erases the determination result of the abnormality determination of the main contactor forced opening system that was performed last time and has been stored so far. Then, in the above recalculation / retrieval process, the PCM 201 recalculates / retrieves this information. That is, (1) The PCM 201 recalculates (regenerates) the erased information for realizing CAN communication and retransmits it to the CAN communication device to resume CAN communication with the CAN communication device. (2) The PCM 201 performs an abnormality determination of the main contactor forced opening system and updates the abnormality determination result.

[0070] The abnormality determination of the main contactor forced opening system will be described with reference to FIG. 9.

[0071] As shown in FIG. 9, the PCM 201 includes a microcomputer 201A (a microcomputer including a CPU, a memory, etc.) and a system LSI 201C for monitoring the microcomputer 201A. A signal SS5 indicating whether the microcomputer 201A is normal is output from the system LSI 201C. The PCM 201 has an output driver 201B that generates an output signal SS1 to the main contacts 71, 71. The main contacts 71, 71 are opened and closed according to the output signal SS1 from the output driver 201B. The output signal SS1 of the output driver 201B is input to the microcomputer 201A as a monitor signal SS2, and the microcomputer 201A can monitor the output signal SS1 of the output driver 201B. In addition to a normal drive signal SS3 for opening and closing the main contacts 71, 71, a cutoff signal SS4 for opening the main contacts 71, 71 is output from the microcomputer 201A. The above output driver 201B corresponds to the "forced opening command output device" in the claims.

[0072] When a signal indicating that the microcomputer 201A is normal is output from the system LSI 201C and the cutoff signal SS4 is not output from the microcomputer 201A, the output driver 201B outputs the drive signal SS3. Thus, in this case, the main contacts 71, 71 are opened and closed according to the drive signal SS3. On the other hand, when a signal indicating that the microcomputer is abnormal is output from the system LSI 201C (or when a signal indicating normality is not output), or when the cutoff signal SS4 is output from the microcomputer 201A, regardless of the drive signal SS3, the output driver 201B outputs a signal for forcibly opening the main contacts 71, 71. Thus, in this case, the main contacts 71, 71 are forcibly opened regardless of the drive signal SS3.

[0073] The abnormality determination of the main contactor forced opening / closing system is a process of determining whether the main contacts 71, 71 can be forcibly opened / closed by the signal output from the system LSI 201C and the output of the cutoff signal SS4, that is, whether a command for forcibly opening / closing the main contacts 71, 71 can be correctly output from the output driver 201B. This determination is performed for each of the system LSI 201C and the cutoff signal SS4. Hereinafter, the signal for opening the main contacts 71, 71 is referred to as an open signal, and the signal for closing them is referred to as a close signal.

[0074] As a specific procedure for the abnormality determination regarding the system LSI 201C, the PCM 201 first sets the drive signal SS3 to the open signal and sets the output signal SS5 of the system LSI 201C to the signal when the microcomputer 201A is abnormal. Note that in step S22, the main contacts 71, 71 are already opened / closed. That is, the drive signal SS3 is already the open signal and this is maintained. Also, the PCM 201 stops the output of the cutoff signal SS4.

[0075] Next, the PCM 201 sets the drive signal SS3 to the close signal while maintaining the output signal of the system LSI 201C as the signal when the microcomputer 201A is abnormal.

[0076] At this time, if the signal indicating that the microcomputer 201A is abnormal is properly output from the system LSI 201C, even if the drive signal SS3 is switched from the open signal to the closed signal, the signal output from the output driver 201B remains the open signal. On the other hand, if the signal indicating that the microcomputer 201A is abnormal is not properly output from the system LSI 201C, the output signal SS1 of the output driver 201B is switched to the closed signal when the drive signal SS3 is switched from the open signal to the closed signal. From this, the PCM 201 determines whether or not the monitor signal SS2 has been switched from the open signal to the closed signal as the drive signal SS3 is switched to the closed signal. When the monitor signal SS2 has been switched, it is determined that the signal indicating that the microcomputer 201A is abnormal is not properly output from the system LSI 201C, and that the command for forcibly opening the main contacts 71, 71 from the system LSI 201C is not correctly output. On the other hand, the PCM 201 determines that the above command is correctly output when the monitor signal SS2 is switched as the drive signal SS3 is switched to the closed signal.

[0077] As a specific determination procedure for the cutoff signal SS4, the PCM 201 first sets the drive signal SS3 to the open signal (and maintains it at the open signal) and outputs the cutoff signal SS4. At this time, the system LSI is made to output a signal when the microcomputer 201A is normal. Next, the PCM 201 sets the drive signal SS3 to the closed signal while maintaining the output of the cutoff signal SS4.

[0078] At this time, if the cutoff signal SS4 is properly output, even if the drive signal SS3 is switched from the open signal to the closed signal, the signal output from the output driver 201B remains the open signal. On the other hand, when the cutoff signal SS4 is not properly output, the signal output from the output driver 201B is switched to the closed signal when the drive signal SS3 is switched from the open signal to the closed signal. From this, the PCM 201 determines whether or not the monitor signal SS2 has been switched from the open signal to the closed signal as the drive signal SS3 is switched to the closed signal. When the monitor signal SS2 is switched, it is determined that the cutoff signal SS4 is not properly output, that is, a command for forcibly opening the main contacts 71, 71 is not correctly output. On the other hand, when the monitor signal SS2 is switched, it is determined that the above command is correctly output.

[0079] Returning to the flowchart of FIG. 7, after starting the above-described replenishment charge stop post-processing, the PCM 201 determines whether or not a predetermined reference time has elapsed after the information erasure process has ended (step S27). This reference time is set to a time longer than the time required for the information erasure process to end and the re-calculation / re-acquisition process to be completed. At the timing when the determination in step S27 becomes YES, the re-calculation / re-acquisition process is completed.

[0080] When the reference time has elapsed after the information erasure process is completed and the recalculation / recapture process is completed, the PCM 201 receives information regarding the high-voltage battery 2 including the battery SOC from the BECM 205 and updates the information it holds (step S28). As described above, the signal for CAN communication output from the PCM 201 to the BECM 205 by the information erasure process is once erased. However, since the recalculation / recapture process is completed, the above signal is regenerated and re-output from the PCM 201. Thus, the PCM 01 communicates with the BECM 205, receives the latest battery SOC, and the latest detection values of the battery current sensor SN1 and the battery temperature sensor SN2 from the BECM 205, and updates the information it holds. Here, the BECM 205 is configured to calculate the initial value of the battery SOC when the main contacts 71, 71 are switched from the closed state to the open state in step S22, and this initial value of the battery SOC is transmitted to the PCM 201 in step S28.

[0081] When the PCM 201 receives information such as the latest battery SOC, it ends the replenishment charge end control.

[0082] (Control when the external charge start condition and the replenishment charge end condition are satisfied) Next, the control when the external charge start condition is satisfied during the replenishment charge and the control when the replenishment charge end condition is satisfied with the establishment of the external charge start condition, that is, in the flowchart of FIG. 4, when the PCM 201 determines that the replenishment charge is in progress (the determination in step S101 is YES) and determines that the external charge start condition is satisfied (the determination in step S103 is YES), and further determines that the replenishment charge end condition is satisfied (step S104), the control in this case will be described. FIG. 10 is a flowchart showing the control content of the PCM 201 when the external charge start condition is satisfied during the replenishment charge (following 3 in FIG. 4). FIG. 11 is a diagram showing the control content of each controller when the external charge start condition is satisfied during the replenishment charge.

[0083] Even when the external charging start condition is satisfied during the execution of the supplementary charging, the PCM 201 generates a CAN request signal for realizing CAN communication with the DC charger 312 and transmits this signal to the DC charger 312 when the external charging start condition is satisfied, in the same manner as when the external charging start condition is satisfied in a state where the supplementary charging is not being performed (step S31).

[0084] On the other hand, when the external charging start condition is satisfied during the execution of the supplementary charging, since the supplementary charging end condition is satisfied, which is different from the case where the external charging start condition is satisfied in a state where the supplementary charging is not being performed, the PCM 201 starts the supplementary charging end control.

[0085] Similar to the case where the supplementary charging end condition is satisfied in a state where the external charging start condition is not satisfied, the PCM 201 first opens the main contactors 71, 71 (step S32). Next, the PCM 201 transmits a cut-off request signal to the supplementary charging device 20 to stop the supplementary charging device 20 (step S33). As described above, when the supplementary charging device 20 receives the cut-off request signal (step Q21), it performs a writing process (step Q22), and when the writing process is completed, it transmits a cut-off permission signal to the PCM 201 (step Q23). Then, when the cut-off permission signal is input from the supplementary charging device 20 (when the determination in step S34 becomes YES), the PCM 201 stops the supplementary charging device 20 (step S35).

[0086] After stopping the auxiliary charging device 20, the PCM 201 starts the post-auxiliary charging stop process (step S36). That is, it starts the information erasure process (step S36A). However, if the auxiliary charging end condition is satisfied due to the external charging start condition being satisfied during the execution of the auxiliary charging, the external charging start control is started (resumed) without waiting for the reference time to elapse after the information erasure process ends. That is, when the PCM 201 determines that the information erasure process has ended (when the determination in step S37 in FIG. 10 becomes YES), before the reference time elapses and before the recalculation and reacquisition of information (signals) such as the abnormality determination result of the main contactor forced opening system erased by the information erasure process and the recalculation and reacquisition of other information are completed, the external charging start control is started (resumed). Also, the PCM 201 performs the external charging start control while performing the recalculation and reacquisition process.

[0087] Specifically, when the information erasure process ends, the PCM 201 generates a CAN request signal for realizing CAN communication with the DC charger 312, which is the first step of the external charging start control, while performing the recalculation and reacquisition process, and transmits this signal to the DC charger 312 (step S40), and starts CAN communication with the DC charger 312. After that, the PCM 201 transmits the pre-external charging information to the DC charger 312 by CAN communication (step S41), closes the contacts 71 and 73 (step S42), starts the auxiliary charging device 20 (step S43), waits for a start completion signal to be input from the auxiliary charging device 20 (waits for the determination in step S44 to become YES), transmits a charging start signal to the DC charger 312 (step S45), and starts external charging of the DC charger 312.

[0088] Note that, immediately after the external charging start condition is satisfied, the PCM 201 executes step S31 to generate and transmit a CAN request signal for realizing CAN communication with the DC charger 312. However, since the supplementary charge stop post-processing is started in step S26 and the information erasure process is executed, this CAN request signal is erased. Thus, as described above, when the information erasure process ends, the PCM 201 executes again, in step S40, the step of generating a CAN request signal and transmitting this signal to the DC charger 312.

[0089] Here, the step of stopping the supplementary charging device 20 in steps S25 and S35 described above corresponds to the "stop control" of the claims, the information erasure process in steps S26A and S36A corresponds to the "information erasure control" of the claims, the re-calculation and re-acquisition process in steps S26B and S36B corresponds to the "update control" of the claims, and the step of the PCM 201 receiving and updating the information of the high-voltage battery 2 from the BECM 205 in step S28 corresponds to the "SOC reception control" of the claims. Also, the steps of steps S2 to S7 and S40 to S45 described above correspond to the "external charging start control" of the claims.

[0090] (Function, etc.) As described above, in the above embodiment, supplementary charging for charging the low-voltage battery 3 with the high-voltage battery 2 and external charging for charging the high-voltage battery 2 with the external power supply device 310 outside the vehicle are realized. Therefore, the charge amounts of both the high-voltage battery 2 and the low-voltage battery 3 can be ensured.

[0091] Also, when the external charging start condition is satisfied during the execution of the supplementary charging, after the supplementary charging device 20 is stopped, the external charging start control is executed, CAN communication between the DC charger 312 and the PCM 201 is started, and a command to start external charging is issued to the DC charger 312, whereby external charging is started (step S7 is executed). Therefore, it is possible to appropriately start external charging by avoiding interference between the control for executing supplementary charging and the control for starting external charging.

[0092] Also, when the recharge completion condition is satisfied, after the recharge device 20 stops, an information erasure process and a re-calculation / re-acquisition process are performed, and a part of the PCM 201 is reset. Therefore, the opportunity to reset the PCM 201 can be ensured and the information of the PCM 201 can be appropriately updated. In particular, in the above embodiment, after the recharge device 20 stops, the PCM 201 erases the abnormality determination result of the main contactor forced opening system that it has stored so far, and then a process of re-performing the abnormality determination is performed. That is, the abnormality determination of the main contactor forced opening system is performed when the re-calculation / re-acquisition process is executed. Therefore, the opportunity to perform the abnormality determination of the main contactor forced opening system can be ensured.

[0093] Also, when the recharge completion condition is satisfied while the external charging condition is not satisfied, after the completion of the post-recharge stop process (information erasure process and re-calculation / re-acquisition process), the latest information of the high-voltage battery 2 including the battery SOC is transmitted from the BECM 205 to the PCM 201 by CAN communication, and the information held by the PCM 201 is updated. Therefore, the PCM 201 can be made to grasp the latest value of the battery SOC, which is the value after being decreased by the execution of the recharge, and the control regarding the subsequent high-voltage battery 2 can be performed more appropriately. Moreover, this battery SOC update process is executed after the elapse of the reference time since the recharge device 20 stopped. Therefore, surely, after the post-recharge stop process is completed and the CAN communication between the BECM 205 and the PCM 201 is restarted, the battery SOC update process can be executed, and the PCM 201 can surely grasp the latest battery SOC information.

[0094] However, even if the recharge completion condition is satisfied due to the establishment of the external charging start condition, if the external charging is started after waiting for the elapse of the reference time since the recharge device 20 stopped, the time from the establishment of the external charging start condition to the start of the external charging becomes long.

[0095] In contrast, in the above embodiment, when the supplementary charge end condition is satisfied as the external charge start condition is satisfied, the external charge start control is started (resumed) and the external charge is started before the reference time elapses after the information erasure process ends, without waiting for the reference time to elapse after the information erasure process ends. That is, when the supplementary charge end condition is satisfied as the external charge start condition is satisfied, the external charge start control is started (resumed) before the reference time elapses after the information erasure process ends, and the external charge is started. Therefore, it is possible to avoid a delay in the time from when the external charge start condition is satisfied until the external charge is started.

[0096] Also, in the above embodiment, before stopping the supplementary charging device 20 when the supplementary charge end condition is satisfied, a writing process is performed, and information regarding the supplementary charging device 20, such as the determination result of the failure determination of the supplementary charging device 20, is written from the volatile memory 207B to the non-volatile memory 207C. Therefore, even after the supplementary charging device 20 is stopped and the supplementary charging is completed, the information regarding the supplementary charging device 20 can be continuously held by the supplementary charging device 20.

[0097] Here, the above writing process is also performed when the supplementary charge end condition is satisfied as the external charge start condition is satisfied during the execution of the supplementary charge. Therefore, when the external charge start condition is satisfied during the execution of the supplementary charge, the start time of the external charge is delayed by the time of the writing process. In contrast, in the above embodiment, as described above, when the external charge start condition is satisfied during the execution of the supplementary charge, the external charge start control is started (resumed) without waiting for the reference time to elapse after the information erasure process ends, thereby preventing the start time of the external charge from being delayed. Therefore, in the above case, it is possible to prevent the start time of the external charge from being excessively delayed while performing the writing process.

[0098] Also, in the above embodiment, when the external charge start condition is satisfied, the main contacts 71, 71 are closed and the supplementary charging device 20 is activated to start the supplementary charge. That is, the supplementary charge is also performed during the external charge. Therefore, the charge amounts of both the high-voltage battery 2 and the low-voltage battery 3 can be more ensured.

[0099] Also, in the above embodiment, when the external charging start condition is satisfied during the supplementary charging and the supplementary charging end condition is satisfied accordingly, after the main contacts 71, 71 are opened and the supplementary charging device 20 stops, the main contacts 71, 71 are closed and the supplementary charging device 20 is started. Therefore, it is possible to prevent interference between the control of opening the main contacts 71, 71 and stopping the supplementary charging device 20, which is performed when the supplementary charging ends, and the control of closing the main contacts 71, 71 and starting the supplementary charging device 20, which is performed when the external charging starts.

[0100] (Modification example) In the above first and second embodiments, the case where the external power supply device that supplies power to the high-voltage battery 2 outputs a direct current has been described. However, the external power supply device may output an alternating current.

[0101] Also, in the above embodiment, the case where both the volatile memory 207B and the non-volatile memory 207C are provided in the supplementary charging device 20 has been described. However, the volatile memory 207B and the non-volatile memory 207C may be provided in another controller (for example, the PCM 201). Also, the device that performs the writing process is not limited to the CPU 207A of the supplementary charging device 20.

Explanation of reference numerals

[0102] 2 High-voltage battery 3 Low-voltage battery 4 Motor 8 DC / DC converter 20 Supplementary charging device 30 High-voltage circuit 50 DC charging connection device 71 Main contact (disconnection / connection device) 201 PCM (control device) 201B Output driver (forced opening command output device) 205 BECM (SOC calculation device) 207A Volatile memory (temporary storage device) 207B Non-volatile memory (storage device) 207C CPU (Writing Processing Device) 310 DC Power Supply Unit (Power Supply Unit) 312 DC Charger (Charger)

Claims

1. In a battery charging control device for a vehicle, comprising a motor as a drive source, a high-voltage battery that supplies power to the motor, a low-voltage battery having an output voltage lower than that of the high-voltage battery, and a charging connection device that is connected to a power supply device having a charger provided outside the vehicle and realizes external charging for charging the high-voltage battery by the power supply device, a supplementary charging device that performs supplementary charging for charging the low-voltage battery with the output power of the high-voltage battery; an SOC calculation device that calculates a battery SOC which is the SOC of the high-voltage battery; a control device that controls each device including the supplementary charging device and is capable of CAN communication with a CAN communication device including the charger and the SOC calculation device, wherein the control device determines whether an external charging start condition, which is a condition for starting the external charging, is satisfied, and when the external charging start condition is satisfied during the supplementary charging or when another predetermined condition is satisfied, determines that a supplementary charging end condition, which is a condition for ending the supplementary charging, is satisfied; when it is determined by the determination unit that the supplementary charging end condition is satisfied, a supplementary charging control unit that performs stop control for stopping the supplementary charging device, information erasure control for erasing a plurality of information including a signal for realizing CAN communication between the control device and the CAN communication device after the end of the stop control, and update control for updating at least a part of the erased information; when it is determined by the determination unit that the external charging start condition is satisfied, an external charging control unit that performs external charging start control for starting CAN communication with the charger and issuing a command to start the external charging to the charger; when the supplementary charging end condition is satisfied while the external charging start condition is not satisfied, after a predetermined reference time has elapsed since the end of the information erasure control, the supplementary charging control unit performs SOC reception control for performing CAN communication with the SOC calculation device and receiving the battery SOC information from the SOC calculation device; when the supplementary charging end condition is satisfied along with the satisfaction of the external charging start condition, the external charging control unit starts the external charging start control before the reference time elapses after the stop control is performed and the information erasure control is ended. A battery charging control device for a vehicle characterized by the above.

2. In the battery charging control device for a vehicle according to Claim 1, A temporary storage device capable of storing information related to the supplementary charging device only during the operation of the supplementary charging device, A storage device capable of storing information related to the supplementary charging device both during and after the operation of the supplementary charging device, A writing processing device that performs a writing process of writing and storing the information stored in the temporary storage device in the storage device, and The supplementary charging control unit causes the writing processing device to perform the writing process before the implementation of the stop control when the supplementary charging end condition is satisfied. A battery charging control device for a vehicle, characterized in that.

3. In the battery charging control device for a vehicle according to claim 1 or 2, A disconnecting and connecting device capable of disconnecting and connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery, A forced opening command output device capable of outputting a forced opening command that is a command for forcibly opening the disconnecting and connecting device, and The supplementary charging control unit determines whether or not the forced opening command is output from the forced opening command output device when the update control is performed. A battery charging control device for a vehicle, characterized in that.

4. In the battery charging control device for a vehicle according to claim 1 or 2, A disconnecting and connecting device capable of disconnecting and connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery is provided, When the supplementary charging end condition is satisfied, the supplementary charging control unit opens the disconnecting and connecting device before the implementation of the stop control, When the external charging start condition is satisfied, the external charging control unit closes the disconnecting and connecting device, starts the supplementary charging device to start the supplementary charging, and when the external charging start condition is satisfied during the supplementary charging, after the disconnecting and connecting device is opened by the supplementary charging control unit and the stop control is performed, the disconnecting and connecting device is closed and the supplementary charging device is started. A battery charging control device for a vehicle, characterized in that.

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