Vehicle control system and vehicle power supply equipment

Abstract

Properly switching between charging and power supply. [Solution] The control device for the electric vehicle is a control device for an electric vehicle equipped with a drive battery capable of charging and supplying power to and from the EVSE. The control device comprises a processor and a communication unit that communicates with the EVSE. When predetermined conditions for performing charging and supplying power between the EVSE and the drive battery are met (if the result is YES in step S116 of Figure 3), the processor controls the communication unit to communicate that it will switch to a charging and supplying mode in which it will charge and supply power to and from the EVSE (step S117 of Figure 3). If the predetermined conditions are not met, the processor controls the communication unit to communicate that it will switch to a charging mode in which the EVSE will charge the drive battery.

Description

Technical Field

[0001] This disclosure relates to a vehicle control device and vehicle power supply equipment, and particularly to a vehicle control device including a power storage device capable of charging and discharging with the vehicle power supply equipment, and vehicle power supply equipment capable of charging and discharging with the vehicle's power storage device.

Background Art

[0002] Conventionally, vehicles capable of detecting a charging mode for charging a vehicle's power storage device from outside the vehicle and a power feeding mode for supplying power from the vehicle's power storage device to the outside have been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technology of Patent Document 1, switching between the charging mode and the power feeding mode was assumed. However, the case where both a charging stand having only a charging function and a charging / discharging stand having both charging and power feeding functions exist was not considered. Also, in a system where incentives are given to vehicle users for power feeding from the vehicle to the power grid, if authentication for giving incentives is not provided for the combination of the vehicle and the stand, there is a risk that incentives will not be given to the user. For this reason, a method for determining the charging or power feeding function of vehicle power supply equipment such as a charging / discharging stand and a charging stand is required.

[0005] This disclosure has been made to solve the above-described problems, and an object thereof is to provide a vehicle control device and vehicle power supply equipment capable of appropriately switching between charging and charging / discharging. [Means for solving the problem]

[0006] The vehicle control device relating to this disclosure is a vehicle control device equipped with a power storage device capable of charging and supplying power to and from a vehicle power supply facility. The control device comprises a processor and a communication unit that communicates with the vehicle power supply facility. The processor controls the communication unit to communicate that it will switch to a charging mode in which it will charge and supply power to and from the vehicle power supply facility when predetermined conditions for performing charging and supplying power between the vehicle power supply facility and the power storage device are met, and controls the communication unit to communicate that it will switch to a charging mode in which it will charge the power storage device from the vehicle power supply facility when the predetermined conditions are not met.

[0007] With this configuration, when predetermined conditions for performing charging and power supply between the vehicle power supply equipment and the energy storage device are met, the system switches to a charging and power supply mode in which charging and power supply are performed between the vehicle power supply equipment and the energy storage device. If the predetermined conditions are not met, the system switches to a charging mode in which the vehicle power supply equipment charges the energy storage device. As a result, it is possible to provide a vehicle control device that can appropriately switch between charging and charging and power supply.

[0008] The specified conditions may include a condition that certification has been obtained regarding charging and supplying power between the vehicle power supply equipment and the vehicle.

[0009] With this configuration, if the condition that certification for charging and supplying power between the vehicle's power supply equipment and the vehicle has been obtained is met, the system switches to a charging and supplying mode that involves charging and supplying power between the vehicle's power supply equipment and the vehicle. As a result, it is possible to appropriately switch between charging and charging / supplying power.

[0010] The specified conditions may include the condition that the communication connection between the vehicle's power supply equipment and the vehicle has been completed.

[0011] With this configuration, once the condition that communication connection between the vehicle's power supply equipment and the vehicle is completed is met, the system switches to a power supply mode in which it supplies power to and from the vehicle's power supply equipment. As a result, it is possible to appropriately switch between charging and power supply.

[0012] The specified conditions may include a condition that the vehicle power supply equipment connected to the power grid conforms to the grid code, which is the rule that the vehicle power supply equipment must follow.

[0013] With this configuration, if the vehicle power supply equipment connected to the power grid conforms to the grid code, which is the rule that the equipment must follow, the system switches to a power supply mode that involves charging and supplying power to and from the vehicle power supply equipment. As a result, charging and power supply can be switched appropriately.

[0014] The processor may be configured to determine whether predetermined conditions are met. With such a configuration, the vehicle can appropriately determine whether predetermined conditions for performing charging and discharging between the vehicle power supply equipment and the energy storage device are met.

[0015] The vehicle may further include an alerting device, and the processor may control the alerting device to alert in different ways whether it is in charging mode or power supply mode.

[0016] With this configuration, the vehicle user can be appropriately informed whether the vehicle is in charging mode or power supply mode.

[0017] The processor may control the communication unit to send instructions to the vehicle user's communication terminal in different ways to indicate whether the vehicle is in charge-supply mode or charging mode.

[0018] With this configuration, the vehicle user can be appropriately informed whether the vehicle is in charging mode or power supply mode.

[0019] The vehicle may further be equipped with a notification device, and the processor may control the notification device to prompt connection to a vehicle power supply facility where predetermined conditions are met if predetermined conditions are not met.

[0020] According to such a configuration, when a predetermined condition for performing charging and discharging between the vehicle power supply equipment and the energy storage device is not satisfied, it is possible to prompt the user who wants to use the charging / discharging mode to connect to the vehicle power supply equipment for which the predetermined condition is satisfied.

[0021] When the predetermined condition is not satisfied, the processor may control the communication unit to transmit an instruction for notifying the user of the vehicle to prompt connection to the vehicle power supply equipment for which the predetermined condition is satisfied to the communication terminal of the user of the vehicle.

[0022] According to such a configuration, when a predetermined condition for performing charging and discharging between the vehicle power supply equipment and the energy storage device is not satisfied, it is possible to prompt the user who wants to use the charging / discharging mode to connect to the vehicle power supply equipment for which the predetermined condition is satisfied.

[0023] The vehicle may further include a notification device, and when the predetermined condition is not satisfied, the processor may control the notification device to notify that the vehicle is to shift to charging in the charging mode.

[0024] According to such a configuration, when a predetermined condition for performing charging and discharging between the vehicle power supply equipment and the energy storage device is not satisfied, it is possible to appropriately notify the user of the vehicle that charging and discharging will not be performed.

[0025] When the predetermined condition is not satisfied, the processor may control the communication unit to transmit an instruction for notifying the user of the vehicle to prompt shifting to charging in the charging mode to the communication terminal of the user of the vehicle.

[0026] According to such a configuration, when a predetermined condition for performing charging and discharging between the vehicle power supply equipment and the energy storage device is not satisfied, it is possible to appropriately notify the user of the vehicle that charging and discharging will not be performed.

[0027] The processor may be configured to determine whether to continue the charge / discharge mode or the charging mode based on the determination result of the state of charge (SOC) of the power storage device. According to such a configuration, the charge / discharge mode or the charging mode can be appropriately continued.

[0028] According to another aspect of this disclosure, a vehicle power supply facility is a power supply facility capable of charge / discharge with a power storage device of a vehicle, and includes a processor and a communication unit that communicates with the vehicle. When a predetermined condition for performing charge / discharge between the vehicle power supply facility and the power storage device is satisfied, the processor controls the communication unit to communicate that it shifts to a charge / discharge mode of performing charge / discharge with the power storage device, and when the predetermined condition is not satisfied, controls the communication unit to communicate that it shifts to a charging mode of charging from the vehicle power supply facility to the power storage device.

[0029] According to such a configuration, a vehicle power supply facility capable of appropriately switching between charging and charge / discharge can be provided.

[0030] The processor may be configured to determine whether the predetermined condition is satisfied. According to such a configuration, it is possible to appropriately determine on the side of the vehicle power supply facility whether a predetermined condition for performing charge / discharge between the vehicle power supply facility and the power storage device is satisfied.

Advantages of the Invention

[0031] According to this disclosure, it is possible to provide a control device for a vehicle and a vehicle power supply facility capable of appropriately switching between charging and charge / discharge.

Brief Description of the Drawings

[0032] [Figure 1] It is a diagram schematically showing the overall configuration of an electric vehicle according to this embodiment. [Figure 2] It is a block diagram showing the control flow of the first embodiment. [Figure 3] It is a first flowchart showing the control flow of the first embodiment. [Figure 4]This is a second flowchart showing the control flow of the first embodiment. [Figure 5] This is a block diagram showing the control flow of the second embodiment. [Figure 6] This is a flowchart showing the control flow of the second embodiment. [Modes for carrying out the invention]

[0033] The embodiments of this disclosure will be described in detail below with reference to the drawings. In the drawings, identical or corresponding parts are denoted by the same reference numerals, and their descriptions will not be repeated.

[0034] Figure 1 is a schematic diagram showing the overall configuration of the electric vehicle 1 according to this embodiment. Figure 1 shows the electric vehicle 1 and the electric vehicle supply equipment (EVSE) 300 being electrically connected by charging cables 301 and 302. The EVSE 300 includes a control device 310. The EVSE 300 selectively includes an AC supply circuit 320 and a DC supply circuit 330. The control device 310 includes a CPU (Central Processing Unit) 311 and a communication unit 314.

[0035] The EVSE300 may be, for example, a standard charger installed in a typical home. In this case, the EVSE300 includes an AC supply circuit 320. The AC supply circuit 320 is controlled by a control device 310 and outputs AC power supplied from an external power source, the grid power supply 400, to the electric vehicle 1 via a charging cable 301. In this case, the EVSE300 does not include a charging cable 302 and a DC supply circuit 330 for supplying DC power.

[0036] The EVSE300 may be a rapid charger installed at a charging station or similar location where the electric vehicle 1 is located. In this case, the EVSE300 includes a DC supply circuit 330. The DC supply circuit 330 is controlled by a control device 310 to convert the AC power of the external power source, the grid power supply 400, into DC power and output it to the electric vehicle 1 via the charging cable 302. In this case, in addition to the rapid charging function provided by the DC supply circuit 330 and the charging cable 302, the EVSE300 may also have a normal charging function provided by the AC supply circuit 320 and the charging cable 301. When the electric vehicle 1 is being charged externally, either the charging cable 301 or the charging cable 302 is connected to the electric vehicle 1.

[0037] The AC supply circuit 320 of the EVSE300 may, in addition to the normal charging function, also have a reverse power flow function that supplies AC power supplied from the electric vehicle 1 via the charging cable 301 to the grid power supply 400. The DC supply circuit 330 of the EVSE300 may, in addition to the rapid charging function, also have a reverse power flow function that converts DC power supplied from the electric vehicle 1 via the charging cable 302 into AC power and supplies it to the grid power supply 400.

[0038] In this embodiment, the electric vehicle 1 is a battery electric vehicle (BEV). However, the electric vehicle 1 may also be a plug-in hybrid electric vehicle (PHEV) equipped with an internal combustion engine and capable of external charging, or a fuel cell electric vehicle (FCEV) capable of external charging and supply. The electric vehicle 1 comprises a motor generator 10, drive wheels 11, a power control unit (PCU) 20, a system main relay (SMR) 21, a drive battery 30, charging relays 32 and 33, a bidirectional charger 34, inlets 41 and 42, and a control device 100. The control device 100 includes an electronic control unit (ECU) 110, a battery ECU 120, a vehicle ECU 130, and a communication ECU 140. Each ECU includes a processor and memory.

[0039] The motor generator 10 is, for example, a three-phase AC rotating electric machine. The motor generator 10 rotates the drive wheels 11 using power from the drive battery 30. The motor generator 10 can also generate electricity through regenerative braking. The AC power generated by the motor generator 10 is converted to DC power by the PCU 20 and charged into the drive battery 30.

[0040] The PCU 20 converts the DC power stored in the drive battery 30 into AC power and supplies it to the motor generator 10 in response to a control signal from the vehicle ECU 130 of the control device 100. In addition, the PCU 20 converts the AC power generated by the motor generator 10 into DC power and supplies it to the drive battery 30 in response to a control signal from the vehicle ECU 130.

[0041] The SMR21 is electrically connected to the power line connecting the PCU20 and the drive battery 30. The SMR21 switches between supplying and cutting off power between the PCU20 and the drive battery 30 in response to a control signal from the vehicle ECU130 of the control device 100.

[0042] The drive battery 30 is a DC power supply configured to be rechargeable and dischargeable. In this embodiment, the drive battery 30 is a battery pack in which battery cells (single cells) are electrically connected in series, and is a high-voltage battery. The battery cells may be, for example, lithium-ion secondary batteries, nickel-metal hydride batteries, or all-solid-state batteries. The monitoring unit 31 detects the voltage, input / output current, temperature, etc. of the drive battery 30 (battery cells) and outputs them to the battery ECU 120 of the control device 100.

[0043] The inlet 41 receives AC power supplied from the EVSE 300 when the charging cable 301 is connected to it. The charging relay 32 is electrically connected to the power line connecting the drive battery 30 and the bidirectional charger 34. The charging relay 32 switches the supply and interruption of power between the drive battery 30 and the bidirectional charger 34 in response to a control signal from the charge control ECU 110 of the control device 100.

[0044] The bidirectional charger 34 is configured, for example, to include an AC / DC converter, which converts the AC power supplied via the charging cable 301 and inlet 41 into DC power and outputs it to the charging relay 32. When the electric vehicle 1 (drive battery 30) is externally charged using the power supplied from the inlet 41 (normal charging), the charging control ECU 110 closes the charging relay 32 and sends a control signal to the bidirectional charger 34 to control the power supplied to the electric vehicle 1. The bidirectional charger 34 converts the DC power from the charging relay 32 into AC power and outputs it to the inlet 41. When the electric vehicle 1 (drive battery 30) is externally powered via the inlet 41, the charging control ECU 110 closes the charging relay 32 and sends a control signal to the bidirectional charger 34 that controls the power supplied from the electric vehicle 1 to the EVSE 300.

[0045] The inlet 42 receives DC power supplied from the EVSE 300 when the charging cable 302 is connected to it. The charging relay 33 is electrically connected to the power line connecting the drive battery 30 and the inlet 42. The charging relay 33 switches the supply and interruption of power between the drive battery 30 and the inlet 42 in response to a control signal from the charge control ECU 110 of the control device 100. When the electric vehicle 1 (drive battery 30) is externally charged using the power supplied from the inlet 42 (rapid charging), the charge control ECU 110 closes the charging relay 33 and transmits a control signal to the control device 310 of the EVSE 300 to control the power supplied to the electric vehicle 1. When the electric vehicle 1 (drive battery 30) is externally powered via the inlet 42, the charge control ECU 110 closes the charging relay 33 and transmits a control signal to the control device 310 of the EVSE 300 to control the power supplied from the electric vehicle 1 to the EVSE 300.

[0046] The Human-Machine Interface (HMI) 101 receives input from the driver and communicates the status of the electric vehicle 1 to the driver; for example, it may be a touch panel display.

[0047] The DCM (Data Communication Module) 103 is an interface for wireless communication with external devices such as the server 200 and the communication terminal 500 via the communication network 900.

[0048] The communication ECU 140 may communicate with the HMI 101, DCM 103, and the communication unit 314 of the EVSE 300 control device 310, for example, via PLC (Power Line Communication) or CAN (Controller Area Network). The communication ECU 140 also controls the DCM 103 to wirelessly communicate with the server 200 and the communication terminal 500 via the communication network 900. The server 200 can communicate with multiple electric vehicles 1 and multiple EVSE 300s via the communication network 900, and updates and stores information such as the charging history of each electric vehicle 1 and information about each EVSE 300 as needed. The charging history of each electric vehicle 1 is stored linked to the location (EVSE 300) where charging took place.

[0049] In the configuration described above, it is conceivable to switch between a charging mode in which the EVSE300 charges the drive battery 30 of the electric vehicle 1, and a charging / power supply mode in which power is supplied between the electric vehicle 1 and the EVSE300. As mentioned above, it is conceivable that there may be cases in which both an EVSE300 with a charging-only function and an EVSE300 with both charging and power supply functions exist. Furthermore, it is conceivable that a system is incentivized for the user of the electric vehicle 1 to supply power to a power grid such as the grid power supply 400 from the electric vehicle 1. In such a system, if authentication for providing incentives is not given for the combination of electric vehicle 1 and the EVSE300, there is a risk that the user will not receive the incentive. For this reason, a method is needed to determine whether an EVSE300 capable of charging and power supply or an EVSE300 capable of charging only has a charging or power supply function.

[0050] Therefore, the processor of the charge control ECU 110 of the control device 100 of the electric vehicle 1 controls the communication ECU 140 to communicate that it will switch to a charge supply mode in which it will charge and supply power to the EVSE 300 if predetermined conditions for performing charge supply between the EVSE 300 and the drive battery 30 are met, and controls the communication ECU 140 to communicate that it will switch to a charge mode in which it will charge the drive battery 30 from the EVSE 300 if the predetermined conditions are not met.

[0051] As a result, when predetermined conditions for charging and supplying power between the EVSE300 and the drive battery 30 are met, the system switches to a charging and supplying mode in which the EVSE300 charges and supplies power to the drive battery 30. If the predetermined conditions are not met, the system switches to a charging mode in which the EVSE300 charges the drive battery 30. Consequently, charging and charging / supplying power can be switched appropriately.

[0052] [First Embodiment] Figure 2 is a block diagram showing the control flow of the first embodiment. Figure 3 is a first flowchart showing the control flow of the first embodiment. Figure 4 is a second flowchart showing the control flow of the first embodiment. Referring to Figures 2 to 4, in the charging control process, when the connector of the charging cable 301 is connected to the inlet 41 (step S111), the processor of the charging control ECU 110 sends an ECU startup request to the communication ECU 140, which includes a vehicle ID that is information that can identify the electric vehicle 1 from others (step S112).

[0053] In HLC (High Level Communication) communication processing, after the connector is connected, the processor of the communication ECU 140 verifies whether the received vehicle ID is correct (step S113), and sends request information "SessionSetupReq" containing that vehicle ID to the EVSE 300 in accordance with the HLC protocol (step S114).

[0054] In the EVSE process, after the connector is connected, the CPU 311 of the EVSE 300 control device 310 receives the request information "SessionSetupReq" and controls the communication unit 314 to send the response information "SessionSetupRes", which includes EVSEID (information that distinguishes the EVSE 300 from others), to the electric vehicle 1 in accordance with the HLC protocol (step S115).

[0055] In HLC communication processing, the processor of the communication ECU 140 determines whether the received EVSEID is an authenticated EVSE300 ID that was pre-stored in memory during manufacturing (step S116). If it is determined that the EVSEID is an authenticated ID (YES in step S116), as shown in Figure 3, the processor of the communication ECU 140 sends a request information "ServiceDiscoveryReq" to the EVSE300 requesting AC power charging and supply in AC_BPT (Bidirectional Power Transfer) mode, in accordance with the HLC protocol (step S117). A message is sent indicating that the system will transition to AC power charging and supply mode.

[0056] In the EVSE process, as shown in Figure 3, when the CPU 311 of the control device 310 of the EVSE 300 receives a request information "ServiceDiscoveryReq" requesting AC power charging and supply in AC_BPT mode, it starts AC_BPT mode and controls the communication unit 314 to send a response information "ServiceDiscoveryRes" containing responsecode=OK, indicating acceptance of the requested AC_BPT mode charging and supply, to the electric vehicle 1 in accordance with the HLC protocol (step S118).

[0057] Subsequently, as shown in Figure 3, in the charge control processing, HLC communication processing, and EVSE processing, the processor of the charge control ECU 110, the processor of the communication ECU 140, and the CPU 311 of the EVSE 300 control device 310, respectively, start a charge and power supply sequence in accordance with ISO 15118-20 (step S130). In this charge and power supply sequence, the continuation of the charge and power supply mode is determined based on the determination result of the State of Charge (SOC) of the drive battery 30. For example, if the SOC falls below a predetermined value, the charge and power supply mode may be terminated without being continued, or charging of the drive battery 30 may be performed while the charge and power supply mode is continued, or the system may transition to the charging mode.

[0058] On the other hand, if it is determined that EVSEID is not an authenticated ID (NO in step S116), the processor of the communication ECU 140 sends a request information “ServiceDiscoveryReq” to EVSE 300 in accordance with the HLC protocol, as shown in Figure 4 (step S121), requesting AC power charging in AC mode. In other words, a message is sent indicating that the system will switch to AC power charging mode.

[0059] In the EVSE process, as shown in Figure 4, when the CPU 311 of the control device 310 of the EVSE 300 receives a request information "ServiceDiscoveryReq" requesting AC power charging in AC mode, it starts AC mode and controls the communication unit 314 to send a response information "ServiceDiscoveryRes" containing responsecode=OK, indicating acceptance of the requested AC mode charging, to the electric vehicle 1 in accordance with the HLC protocol (step S122).

[0060] In the HLC communication process, as shown in Figure 4, when the communication ECU 140 receives response information “ServiceDiscoveryRes” containing responsecode=OK indicating acceptance of charging in AC mode, it sends an EVSE authentication failure status notification to the charging control ECU 110 indicating that authentication of charging and power supply to the EVSE 300 is not possible and that charging will be performed in AC mode (step S123).

[0061] In the charging control process, as shown in Figure 4, when the charging control ECU 110 receives an EVSE authentication failure notification, it controls the DCM 103 to send the EVSE authentication failure notification to the HMI 101 and to send the EVSE authentication failure notification to the communication terminal 500 via the server 200 (step S124). When the HMI 101 and the communication terminal 500 receive the EVSE authentication failure notification, they display and / or voice the user that authentication for charging and power supply of the EVSE 300 is not possible and that charging will be performed in AC power charging mode. They may also be prompted to connect to another EVSE 300 that is capable of performing charging and power supply mode.

[0062] Subsequently, as shown in Figure 4, in the charge control processing, HLC communication processing, and EVSE processing, the processor of the charge control ECU 110, the processor of the communication ECU 140, and the CPU 311 of the EVSE 300 control device 310, respectively, start a charge sequence in accordance with ISO 15118-20 (step S140). In this charge sequence, the continuation of the charge mode is determined based on the determination result of the SOC of the drive battery 30. For example, if the SOC is above a predetermined value or fully charged, the charge mode may be terminated without continuation, or the system may transition to the charge / supply mode.

[0063] Furthermore, in the HLC communication process shown in Figure 3, the communication ECU 140 may, upon receiving response information “ServiceDiscoveryRes” containing responsecode=OK indicating acceptance of charging and power supply in AC mode, send an EVSE authentication status notification to the charging control ECU 110 indicating that the authentication of charging and power supply for the EVSE 300 was successful. Then, in the charging control process shown in Figure 3, upon receiving the EVSE authentication status notification, the charging control ECU 110 may send the EVSE authentication status notification to the HMI 101 and also control the DCM 103 to send the EVSE authentication status notification to the communication terminal 500 via the communication network 900 and server 200. Upon receiving the EVSE authentication status notification, the HMI 101 and the communication terminal 500 may display and / or voice notify the user that the authentication of charging and power supply for the EVSE 300 is successful and that the AC power charging and power supply mode will be executed.

[0064] [Second Embodiment] Figure 5 is a block diagram showing the control flow of the second embodiment. Figure 6 is a flowchart showing the control flow of the second embodiment. The processes shown in the flowchart of Figure 6 are called and executed from higher-level processes at predetermined intervals. Referring to Figures 5 and 6, the processor of the charge control ECU 110 determines whether the connector of the charge cable 301 is mated with the inlet 41 (step S151). The state in which the connector is mated refers to a state in which the connector and the inlet 41 are electrically connected and the connector is latched. If it is determined that the connector is not mated (NO in step S151), the processor of the charge control ECU 110 returns the process to be executed to the higher-level process that called the process in Figure 6.

[0065] On the other hand, if it is determined that the connector has been mated (YES in step S151), the processor of the charge control ECU 110 determines whether or not the HLC communication connection with the EVSE 300 via the communication ECU 140 has been completed (step S152).

[0066] If it is determined that the communication connection is complete (YES in step S152), the processor of the charge control ECU 110 verifies the specifications of the EVSE 300 and the electric vehicle 1 (step S153). Specifically, the processor of the charge control ECU 110 verifies whether the grid code, which is the rule that the EVSE 300 connected to a power system such as grid power supply 400 must follow, matches, and whether the combination of the EVSE 300 and the electric vehicle 1 is a combination that has been certified in accordance with ACV2G (Alternating Current Vehicle to Grid) as defined in EN (European Norm) 50549-1.

[0067] If the comparison of the specifications of EVSE300 and electric vehicle 1 is found to be compatible (YES in step S153), the processor of the charge control ECU110 starts ACV2G using digital communication (step S154). In this case, the communication ECU140 is controlled to send a message to EVSE300 indicating that it is transitioning to AC power charging mode. In this ACV2G, the continuation of ACV2G is determined based on the determination result of the state of charge (SOC) of the drive battery 30. For example, if the SOC falls below a predetermined value, ACV2G may be terminated without continuation, or charging of the drive battery 30 may be performed while ACV2G is continued, or the system may transition to AC charging mode.

[0068] On the other hand, if it is determined that the communication connection has failed (NO in step S152) (i.e., the PLC connection has failed), or if it is determined that the specifications of EVSE300 and electric vehicle 1 are incompatible (NO in step S153), the processor of the charge control ECU110 starts AC charging without using digital communication (step S155). In this case, the communication ECU140 is controlled to send a message to EVSE300 indicating that it is switching to AC power charging mode. The processor of the charge control ECU110 controls HMI101 to execute a notification that it has switched to AC power charging mode (step S156).

[0069] In step S156, the processor of the charge control ECU 110 may control the communication ECU 140 and DCM 103 to notify the user's communication terminal 500 that it has switched to AC power charging mode. Alternatively, the communication ECU 140 and DCM 103 may be controlled to notify the user to connect to another EVSE 300 capable of performing the charging and power supply mode. In this AC charging mode, the continuation of the AC charging mode is determined based on the determination result of the SOC of the drive battery 30. For example, if the SOC is above a predetermined value or fully charged, the AC charging mode may be terminated without continuation, or the system may transition to ACV2G.

[0070] If it is determined that the charging connector is not mated (NO in step S151), after step S154 or after step S156, the processor of the charging control ECU 110 returns the process to be executed to the higher-level process of the caller of the process in Figure 6.

[0071] [Differentiation] (1) In the first and second embodiments described above, as shown in Figures 1 to 6, the target of charging or supplying power was AC power. However, it is not limited to this, and the target of charging or supplying power may also be DC power.

[0072] (2) In the first and second embodiments described above, as shown in step S124 in Figures 3 and 4 and step S156 in Figure 6, notification is given that the system has switched to AC power charging mode, while when the AC power charging and supply mode is performed, notification is not given that the system has switched to charging and supply mode, thereby indicating in different ways whether the system is in charging and supply mode or charging mode. However, the system is not limited to this, and when the AC power charging and supply mode is performed, notification may be given in a different manner than the notification manner for the AC power charging mode, thereby indicating in different ways whether the system is in charging and supply mode or charging mode. As a different manner, for example, the message to be notified may be different, or the method of notification may be different.

[0073] (3) In the first embodiment described above, as shown in Figure 4, the authentication result of charging and supplying power to the EVSE 300 is reported on the HMI 101. However, the invention is not limited to this, and the authentication result of charging and supplying power to the EVSE 300 may also be reported on the meter panel of the electric vehicle 1.

[0074] (4) In the first embodiment described above, as shown in Figures 3 and 4, the process of step S116 is performed by the communication ECU 140. However, the process is not limited to this, and the process of step S116 may be performed by the charge control ECU 110, or by the control device 310 of the EVSE 300, or by the control device 310 of the EVSE 300 and the charge control ECU 110 of the electric vehicle 1 in coordination.

[0075] (5) In the second embodiment described above, as shown in Figures 5 and 6, the process in Figure 6 is performed by the processor of the charge control ECU 110. However, the process in Figure 6 may also be performed by the CPU 311 of the control device 310 of the EVSE 300, or it may be performed in coordination by the processor of the charge control ECU 110 and the CPU 311 of the control device 310 of the EVSE 300.

[0076] (6) The embodiments described above can be interpreted as disclosures of the electric vehicle 1 or EVSE 300, or as disclosures of the control device 100 (charge control ECU 110, communication ECU 140) of the electric vehicle 1 or the control device 310 of the EVSE 300, or as disclosures of control methods or control programs executed by the control device 100 of the electric vehicle 1 or the control device 310 of the EVSE 300.

[0077] [summary] (1) As shown in Figure 1, the control device 100 of the electric vehicle 1 is a control device 100 of the electric vehicle 1 equipped with a drive battery 30 that can charge and supply power to and from the EVSE 300. The control device 100 comprises a processor (for example, the processor of the charge control ECU 110 and the processor of the communication ECU 140) and a communication unit (for example, the communication ECU 140) that communicates with the EVSE 300. As shown in Figures 2 to 6, the processor controls the communication unit to communicate that it will transition to a charging mode in which it will charge the EVSE 300 when predetermined conditions for performing charging and power supply between the EVSE 300 and the drive battery 30 are met (for example, when the answer is YES in step S116 of Figure 3, or when the answer is YES in steps S152 and S153 of Figure 6) (for example, step S117 of Figure 3, step S154 of Figure 6). If the predetermined conditions are not met (for example, when the answer is NO in step S116 of Figure 4, or when the answer is NO in step S152 or step S153 of Figure 6), the processor controls the communication unit to communicate that it will transition to a charging mode in which it will charge the drive battery 30 from the EVSE 300 (for example, step S121 of Figure 4, step S155 of Figure 6).

[0078] As a result, when predetermined conditions for charging and supplying power between the EVSE300 and the drive battery 30 are met, the system switches to a charging and supplying mode in which the EVSE300 charges and supplies power to the drive battery 30. If the predetermined conditions are not met, the system switches to a charging mode in which the EVSE300 charges the drive battery 30. Consequently, charging and charging / supplying power can be switched appropriately.

[0079] (2) As shown in step S116 in Figures 3 and 4 and step S153 in Figure 6, the predetermined conditions may include the condition that certification has been obtained regarding charging and supplying power between the EVSE300 and the electric vehicle 1.

[0080] As a result, if the condition is met that certification for charging and supplying power between the EVSE300 and the electric vehicle 1 has been obtained, the system will switch to a charging and supplying mode for charging and supplying power between the EVSE300 and the electric vehicle 1. Consequently, it is possible to appropriately switch between charging and charging / supplying power.

[0081] (3) As shown in step S153 of Figure 6, the predetermined conditions may include the condition that the communication connection between the EVSE 300 and the electric vehicle 1 has been completed.

[0082] As a result, when the condition that a communication connection between the EVSE300 and the electric vehicle 1 is met is met, the system switches to a charging and supply mode in which it charges and supplies power to the EVSE300. Consequently, it is possible to appropriately switch between charging and charging / supplying power.

[0083] (4) As shown in step S153 of Figure 6, the predetermined conditions may include the condition that the EVSE 300 connected to a power grid, such as grid power supply 400, conforms to the grid code, which is a rule that the EVSE 300 must follow.

[0084] As a result, if the EVSE300 connected to a power grid, such as grid power supply 400, conforms to the grid code, which is the rule it must follow, it will switch to a charging and supply mode for charging and supplying power to and from the EVSE300. Consequently, it is possible to appropriately switch between charging and charging / supplying power.

[0085] (5) As shown in step S116 in Figures 3 and 4 and in steps S152 and S153 in Figure 6, the processor of the electric vehicle 1 may be configured to determine whether predetermined conditions are met. This allows the electric vehicle 1 to appropriately determine whether predetermined conditions for performing charging and supplying power between the EVSE 300 and the drive battery 30 are met.

[0086] (6) As shown in Figure 1, the electric vehicle 1 further includes an alerting device (e.g., HMI 101). As shown in step S124 of Figure 4 and step S156 of Figure 6, the processor may control the alerting device to alert in different ways whether it is in charging mode or charging mode.

[0087] This allows the user of the electric vehicle 1 to be appropriately informed whether it is in charging mode or power supply mode.

[0088] (7) As shown in step S124 of Figure 4 and step S156 of Figure 6, the processor may control the communication unit to send instructions to the user's communication terminal 500 of the electric vehicle 1 in which of the charging mode and the power supply mode are being indicated in different ways.

[0089] This allows the user of the electric vehicle 1 to be appropriately informed whether it is in charging mode or power supply mode.

[0090] (8) As shown in Figure 1, the electric vehicle 1 further includes a notification device (for example, HMI 101). As shown in step S124 in Figure 4 and step S156 in Figure 6, the processor may control the notification device to prompt a connection to an EVSE 300 where a predetermined condition is met if the predetermined condition is not met.

[0091] This allows the system to prompt users who wish to use the charging mode to connect to an EVSE300 where the predetermined conditions for charging and supplying power between the EVSE300 and the drive battery 30 are not met.

[0092] (9) As shown in step S124 in Figure 4 and step S156 in Figure 6, the processor may control the communication unit to send an instruction to the communication terminal 500 of the electric vehicle 1 user prompting connection to an EVSE 300 where the predetermined conditions are met, if the predetermined conditions are not met.

[0093] This allows the system to prompt users who wish to use the charging mode to connect to an EVSE300 where the predetermined conditions for charging and supplying power between the EVSE300 and the drive battery 30 are not met.

[0094] (10) As shown in Figure 1, the electric vehicle 1 further includes a notification device (for example, HMI 101). As shown in step S124 in Figure 4 and step S156 in Figure 6, the processor may control the notification device to notify that it will switch to charging in charging mode if a predetermined condition is not met.

[0095] This makes it possible to appropriately inform the user of the electric vehicle 1 that charging and power supply will not be performed if the predetermined conditions for performing charging and power supply between the EVSE 300 and the drive battery 30 are not met.

[0096] (11) As shown in step S124 of Figure 4 and step S156 of Figure 6, the processor may control the communication unit to send an instruction to the user's communication terminal 500 of the electric vehicle 1 to notify that the system will switch to charging in charging mode if the predetermined conditions are not met.

[0097] This makes it possible to appropriately inform the user of the electric vehicle 1 that charging and power supply will not be performed if the predetermined conditions for performing charging and power supply between the EVSE 300 and the drive battery 30 are not met.

[0098] (12) As shown in step S130 of Figure 3 and step S140 of Figure 4, the processor may decide to continue the power supply mode or charging mode based on the determination result of the SOC of the drive battery 30. This allows the power supply mode or charging mode to be appropriately continued.

[0099] (13) As shown in Figure 1, the EVSE 300 is a power supply device capable of charging and supplying power to and from the drive battery 30 of the electric vehicle 1, and comprises a CPU 311 of the control device 310 and a communication unit 314 that communicates with the electric vehicle 1. As shown in Figures 5 and 6, the CPU 311 of the control device 310 controls the communication unit 314 to communicate that it will switch to a charging and supply mode in which it will charge and supply power to and from the drive battery 30 if predetermined conditions for performing charging and supply power between the EVSE 300 and the drive battery 30 are met (for example, if the case is YES in steps S152 and S153 of Figure 6) (for example, step S154 of Figure 6), and controls the communication unit 314 to communicate that it will switch to a charging mode in which it will charge the drive battery 30 if predetermined conditions are not met (for example, if the case is NO in steps S152 or S153 of Figure 6) (for example, step S155 of Figure 6). This allows for proper switching between charging and power supply.

[0100] (14) As shown in Figures 5 and 6, the CPU 311 of the control device 310 may determine whether predetermined conditions are met (for example, in steps S152 and S153). This allows the EVSE 300 to appropriately determine whether predetermined conditions for performing charging and supplying power between the EVSE 300 and the drive battery 30 are met.

[0101] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of this disclosure is indicated by the claims rather than by the description of the embodiments above, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0102] 1 Electric vehicle, 10 Motor generator, 11 Drive wheel, 20 PCU, 21 SMR, 30 Drive battery, 31 Monitoring unit, 32,33 Charging relay, 34 Bidirectional charger, 41,42 Inlet, 100,310 Control device, 101 HMI, 110 Charging control ECU, 120 Battery ECU, 130 Vehicle ECU, 140 Communication ECU, 200 Server, 300 EVSE, 301,302 Charging cable, 311 CPU, 314 Communication unit, 320 AC supply circuit, 330 DC supply circuit, 400 System power supply, 500 Communication terminal, 900 Communication network.

Claims

1. A control device for a vehicle equipped with a power storage device capable of charging and supplying power to and from a vehicle power supply facility, Processor and It includes a communication unit that communicates with the aforementioned vehicle power supply equipment, The aforementioned processor, When predetermined conditions for performing charging and supplying power between the vehicle power supply equipment and the energy storage device are met, the communication unit is controlled to communicate that it will switch to a charging and supplying mode for charging and supplying power between the vehicle power supply equipment and the energy storage device. A vehicle control device that controls the communication unit to communicate, if the aforementioned predetermined conditions are not met, that it will switch to a charging mode in which it charges the energy storage device from the vehicle power supply equipment.

2. The vehicle control device according to claim 1, wherein the predetermined conditions include the condition that certification has been obtained regarding charging and supplying power between the vehicle power supply equipment and the vehicle.

3. The vehicle control device according to claim 1, wherein the predetermined condition includes the condition that the communication connection between the vehicle power supply equipment and the vehicle has been completed.

4. The vehicle control device according to claim 1, wherein the predetermined conditions include the condition that the vehicle power supply equipment connected to the power grid conforms to a grid code which is a rule that the vehicle power supply equipment must follow.

5. The control device for a vehicle according to claim 1, wherein the processor determines whether the predetermined conditions are met.

6. The aforementioned vehicle is further equipped with a notification device, The control device for a vehicle according to claim 1, wherein the processor controls the notification device to notify in different ways whether the vehicle is in the charging mode or the power supply mode.

7. The vehicle control device according to claim 1, wherein the processor controls the communication unit to transmit instructions to the vehicle user's communication terminal to indicate in different ways whether the vehicle is in the charging mode or the power supply mode.

8. The aforementioned vehicle is further equipped with a notification device, The control device for a vehicle according to claim 1, wherein the processor controls the notification device to prompt connection to the vehicle power supply equipment where the predetermined conditions are met, if the predetermined conditions are not met.

9. The vehicle control device according to claim 1, wherein the processor controls the communication unit to transmit an instruction to the vehicle user's communication terminal to prompt connection to the vehicle power supply equipment where the predetermined conditions are met, if the predetermined conditions are not met.

10. The aforementioned vehicle is further equipped with a notification device, The control device for a vehicle according to claim 1, wherein the processor controls the notification device to notify that the vehicle should switch to charging in the charging mode if the predetermined conditions are not met.

11. The vehicle control device according to claim 1, wherein the processor controls the communication unit to transmit an instruction to the vehicle user's communication terminal to notify that the vehicle will switch to charging in the charging mode if the predetermined conditions are not met.

12. The vehicle control device according to claim 1, wherein the processor determines the continuation of the charging mode or the charging mode based on the determination result of the State of Control of the energy storage device.

13. A vehicle power supply system that can charge and supply power to and from the vehicle's energy storage device, Processor and It includes a communication unit that communicates with the aforementioned vehicle, The aforementioned processor, When predetermined conditions for performing charging and supplying power between the vehicle power supply equipment and the energy storage device are met, the communication unit is controlled to communicate that it will switch to a charging and supplying mode for charging and supplying power between the vehicle and the energy storage device. Vehicle power supply equipment that controls the communication unit to communicate that it will switch to a charging mode in which the vehicle power supply equipment charges the energy storage device if the predetermined conditions are not met.

14. The vehicle power supply equipment according to claim 13, wherein the processor determines whether the predetermined conditions are met.

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