CHARGING / DISCHARGING DEVICE, CHARGING / DISCHARGING CONTROL METHOD, AND COMPUTER PROGRAM

Abstract

To provide a charging / discharging device, a charging / discharging control method, and a computer program capable of causing a higher-level device to perform appropriate charging / discharging control.SOLUTION: A charging / discharging device includes: a control unit that determines whether there is connection with an on-vehicle storage battery provided on a vehicle and controls charging and discharging of the on-vehicle storage battery; a communication unit that communicates with an on-vehicle control device that controls charging and discharging of the on-vehicle storage battery on the vehicle side; and a notification unit that notifies a higher-level control device of information related to charging and discharging of the on-vehicle storage battery, including vehicle information including information on the on-vehicle storage battery. The control unit causes the notification unit to report the information received and stored most recently from the on-vehicle control device at a timing when it is necessary to notify the higher-level control device of the information related to charging and discharging of the on-vehicle storage battery.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a charging / discharging device connected to a storage battery provided in a vehicle, a charging / discharging control method, and a computer program. [Background technology]

[0002] The battery capacity of the storage battery installed in an electric vehicle is relatively large, for example, 5 to 100 kWh. Technologies have been proposed to realize V2X, including V2H (Vehicle to Home), which enables the power stored in these vehicles to be supplied to homes and other places other than driving the electric vehicle, V2B (Vehicle to Building), which enables the power to be supplied to buildings other than homes, and V2G (Vehicle to Grid), which enables the power to be supplied to a power grid. Even if a power outage occurs due to a disaster, it is expected that the power stored in a mobile electric vehicle can be supplied to maintain life and keep factories running. When realizing V2X, it is desirable to be able to charge and discharge the power in a planned manner under the control of an EMS (Energy Management System).

[0003] Patent Document 1 discloses that a vehicle, which is an electric vehicle, is connected to a system that controls a stable supply of power, and a storage battery of the vehicle is rapidly charged in accordance with demand. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2010 / 082506 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to stabilize the power supply from the power grid in a region including the storage batteries installed in vehicles, other power storage devices, power generation facilities, and each load, the EMS adjusts the amount of charging and discharging in the storage batteries or power storage devices. Therefore, a higher-level device such as the EMS obtains data such as the charging and discharging capacity of the storage batteries from each device, and creates and controls a charging and discharging plan according to the obtained data.

[0006] The charging and discharging of the storage battery installed in the vehicle is controlled by the connected charging and discharging device based on instructions from a higher-level device such as an EMS. The charging and discharging device notifies the higher-level device of the capacity value such as the power that can be charged and discharged. However, in reality, the storage batteries installed in a wide variety of vehicles have different conditions depending on the control in the vehicle or the charging rate, and they are not necessarily capable of charging and discharging with the same performance.

[0007] An object of the present invention is to provide a charge / discharge device, a charge / discharge control method, and a computer program that enable a higher-level device to perform appropriate charge / discharge control. [Means for solving the problem]

[0008] A charging / discharging device of one embodiment of the present disclosure includes a control unit that determines whether or not a connection is made to an on-board storage battery installed in a vehicle, and controls charging and discharging of the on-board storage battery, a communication unit that communicates with an on-board control device that controls charging and discharging of the on-board storage battery on the vehicle side, and a notification unit that notifies a higher-level control device of information related to the charging and discharging of the on-board storage battery, including vehicle information including information about the on-board storage battery, and the control unit causes the notification unit to notify the higher-level control device of information recently received and stored from the on-board control device at a time when it is necessary to notify the higher-level control device of information related to the charging and discharging of the on-board storage battery.

[0009] A charge / discharge control method according to one embodiment of the present disclosure is a method in which a charge / discharge device connected to an on-board power line connected to an on-board storage battery provided in a vehicle controls charging and discharging of the on-board storage battery, in which the charge / discharge device uses a communication unit that communicates with an on-board control device that controls charging and discharging of the on-board storage battery on the vehicle side, acquires information relating to the charging and discharging of the on-board storage battery, including vehicle information including information about the on-board storage battery, and notifies the upper control device of the information most recently received and stored from the on-board control device at a time when it is necessary to notify the upper control device of the information relating to the charging and discharging of the on-board storage battery.

[0010] A computer program according to one embodiment of the present disclosure causes a computer mounted on a charging / discharging device connected to an onboard power line connected to an onboard storage battery provided in a vehicle to use a communication unit that communicates with an onboard control device that controls charging and discharging of the onboard storage battery on the vehicle side, to acquire information regarding the charging and discharging of the onboard storage battery, including vehicle information including information about the onboard storage battery, and to execute a process of notifying a higher-level control device of information most recently received and stored from the onboard control device at a time when it is necessary to notify the higher-level control device of information regarding the charging and discharging of the onboard storage battery.

[0011] In the charge / discharge device, charge / discharge control method, and computer program disclosed herein, the minimum or maximum values ​​of the charge power value, discharge power value, charge current value, and discharge current value of charge / discharge are notified to the upper control device not only of values ​​predetermined by the charge / discharge device but also of values ​​determined based on data obtained from the vehicle-mounted control device as necessary. The charge / discharge power value or current value that can actually be output from the vehicle-mounted storage battery is accurately notified. The value notified here is not determined every time as necessary, but may be the most recently received value or a value most recently determined based on the received value.

[0012] In one embodiment of the charging / discharging device of the present disclosure, the values ​​stored in the memory unit are values ​​defined as specifications of the charging / discharging device, and the values ​​determined by the determination unit and the values ​​stored in the memory unit differ in part.

[0013] In the charging / discharging device of the present disclosure, values ​​that are at least partially different from the minimum or maximum values ​​of the charging power value, discharging power value, charging current value, and discharging current value predetermined by the charging / discharging device are notified to a higher-level control device.

[0014] In the charging / discharging device of one embodiment of the present disclosure, the determination unit determines at least one of the minimum and maximum values ​​of the charging power value, the charging current value, the discharging power value, and the discharging current value according to the characteristics of the vehicle.

[0015] In the charging / discharging device of the present disclosure, vehicle characteristics that are correlated with the minimum and maximum values ​​of the charging power, discharging power, charging current, and discharging current that can be output from the vehicle-mounted storage battery are used as the basis for determining these values. The minimum and maximum values ​​may vary depending on the vehicle model, year, vehicle manufacturer, etc. The minimum and maximum values ​​according to the characteristics are stored, and an appropriate minimum or maximum value for the connected vehicle can be determined based on the identified characteristics.

[0016] In one embodiment of the charging / discharging device of the present disclosure, the determination unit determines at least one of the minimum and maximum values ​​of the charging power value, the charging current value, the discharging power value, and the discharging current value depending on whether the vehicle is a charge-only vehicle or not.

[0017] In the charging / discharging device of the present disclosure, the vehicle feature may be determined according to whether or not the vehicle is a charge-only vehicle. Effect of the Invention

[0018] According to the present disclosure, the capacity value of the power or current value that can actually be output when charging or discharging the on-board storage battery is accurately notified to the higher-level device, so that the higher-level device can appropriately determine and control whether to charge, discharge, or wait based on the accurate capacity value. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram of a charge / discharge system including a charge / discharge device. [Diagram 2]2 is a block diagram showing a connection configuration of a charge / discharge device and a vehicle. FIG. [Diagram 3] 6 is a flowchart showing an example of a processing procedure performed by a control unit of the charging / discharging device. [Figure 4] 6 is a flowchart showing an example of a processing procedure performed by a control unit of the charging / discharging device. [Diagram 5] 13 is a flowchart showing an example of a procedure for determining a minimum value and a maximum value. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The present disclosure will be specifically described with reference to the drawings showing the embodiments thereof.

[0021] FIG. 1 is a schematic diagram of a charging / discharging system 200 including a charging / discharging device 1. The charging / discharging system 200 includes a load 21, a power generation device 23, and the charging / discharging device 1, which are arranged in a home. Power supplied from a power system E (commercial power source) is branched by a power line PL to a vehicle V connected via a distribution board 28 to the load 21, the power generation device 23, and the charging / discharging device 1. The charging / discharging device 1 is connected to a higher-level device 29 by a communication line CL via the distribution board 28. The power supply source may be not only the power system E, but also a DC power network, or a combination of the two. The power supply source may be any other example as long as it can be substituted for the power system E. The power supply source may be one that simulates a commercial system, or may be a power storage device or a power generation system.

[0022] The higher-level device 29 controls the transfer of power from the power system E to the loads 21, and the transfer of power from the power generation device 23 to the loads 21. In the present embodiment, the higher-level device 29 is described as being provided externally as a server device and controlling the transfer of power in the region, but it may also be installed in the distribution board 28 to control power generation, charging, and discharging within the home, or may be built into the charging and discharging device 1.

[0023] In another example, the charging / discharging system 200 includes a power storage device 22, a power generation device 23, and a charging / discharging device 1 installed in a parking lot, which is a public facility. In this example as well, power supplied from the power system E is branched by a power line PL at a distribution board 28 to a vehicle V connected via the power storage device 22, the power generation device 23, and a plurality of charging / discharging devices 1. The charging / discharging system 200 may also include a fuel cell. In the other example as well, the higher-level device 29 is described as being provided externally as a server device, but it may be installed in the distribution board 28 and control the power generation / charging / discharging within the public facility, or may be built into each of the charging / discharging devices 1 and control charging / discharging.

[0024] 2 is a block diagram showing a connection configuration between the charge / discharge device 1 and a vehicle V. The vehicle V is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), or a fuel cell vehicle (FCV). The vehicle V includes a large-capacity power storage device 30 that can be used for driving the vehicle V. The vehicle V includes a connector 35 for a power line VPL connected to the power storage device 30, and an in-vehicle charge / discharge control device 32 that controls charging and discharging in the power storage device 30. A DC relay 33 included in a charge / discharge circuit on the vehicle V side is interposed in the power line VPL, and the in-vehicle charge / discharge control device 32 controls ON and OFF of the DC relay 33. The connector 35 includes a communication terminal for communication with the in-vehicle charge / discharge control device 32.

[0025] The charge / discharge device 1 includes a charge / discharge circuit 10, a control unit 11, a communication unit 12, a power supply unit 13, an operation unit 14, and a higher-level communication unit 16. The charge / discharge circuit 10 includes various circuit elements such as a bidirectional inverter and various relays. The charge / discharge circuit 10 includes a DC relay 10a connected to a connector 15 that is connected to a vehicle V, and a parallel-off relay 10b installed in a power line PL that is connected to a power system E. The charge / discharge circuit 10 is connected to the connector 15 by the power line PL via the DC relay 10a.

[0026] The control unit 11 controls the circuit elements included in the charge / discharge circuit 10, and controls switching between charging and discharging, the amount of current, and the amount of voltage for the power storage device 30 of the vehicle V. The control unit 11 includes a CPU (Central Processing Unit) and a non-volatile memory, and the CPU executes control processing based on a computer program 1P stored in the non-volatile memory to control the charge / discharge circuit 10. Setting values, which will be described later, are rewritably stored in the non-volatile memory.

[0027] The computer program 1P (computer product) stored in the non-volatile memory of the control unit 11 may be a computer program 9P stored in a non-temporary storage medium 9 readable by a computer and stored in memory by the CPU.

[0028] The communication unit 12 can be communicatively connected to the in-vehicle charge / discharge control device 32 via the connector 15 and the connector 35. The communication connection protocol of the communication unit 12 only needs to conform to the charge / discharge method corresponding to the vehicle V and the connectors 15, 35, and may be capable of selectively executing one of a plurality of protocols so as to be applicable to different charge / discharge methods. In this embodiment, the communication unit 12 communicates with the in-vehicle charge / discharge control device 32 via a controller area network (CAN). The communication may also be realized by a PLC.

[0029] The power supply unit 13 includes a UPS (Uninterruptible Power Systems) circuit and a startup storage battery, and supplies power to the control unit 11. In the event of a power outage, the power supply unit 13 supplies the power required to start up the charging / discharging device 1 from the startup storage battery. The power supply unit 13 may charge the startup storage battery with power from the power system E, the power generation device 23, or the vehicle V.

[0030] The operation unit 14 includes a display, a touch panel with a built-in display, and physical buttons, and is exposed on the exterior of the charger / discharger 1 to accept operations including START (launch) and STOP (end) from a user. The control unit 11 may control the charger / discharger circuit 10 based on the operations accepted by the operation unit 14.

[0031] The upper communication unit 16 realizes communication with the upper device 29 via a communication line CL. The upper communication unit 16 may be, for example, a communication module corresponding to the communication line CL conforming to Ethernet (registered trademark), or a communication module corresponding to the communication line CL corresponding to ECHONET / ECHONETLite (registered trademark). The upper communication unit 16 may realize communication by PLC.

[0032] The control unit 11 of the charging / discharging device 1 is connected via a communication line SL to a current sensor S that measures a current for calculating the power supply from the power system E in the distribution board 28. The control unit 11 can obtain the power supply from the power system E to the loads 21 and interconnected devices such as the power storage device 22 and the power generation device 23 from the current sensor S.

[0033] As shown in Figs. 1 and 2, the charge / discharge circuit 10 of the charge / discharge device 1 configured as described above is connected to the power storage device 30 of the vehicle V by a power line PL via the DC relay 10a and the DC relay 33 on the vehicle V side in a state where the connector 15 is connected to the connector 35 of the vehicle V. As shown in Figs. 1 and 2, the charge / discharge circuit 10 is connected to the power system E (or a DC power network), the loads 21, and the interconnection devices (the power storage device 22, the power generation device 23, etc.) by the power line PL via the parallel-off relay 10b and the distribution board 28. The charge / discharge device 1 controls the exchange of power between the power system E (or a DC power network) and the power storage device 30, the loads 21, and the interconnection devices of the vehicle V. The charge / discharge device 1 may control charging of the power storage device 30 using the interconnection devices as a power supply source. The charge / discharge circuit 10 can discharge the power storage device 30 to the loads 21 or charge the power storage device 30 from the power system E via the power line PL when the parallel-off relay 10b, the DC relay 10a, and the DC relay 33 are all in the ON state.

[0034] When the charging / discharging device 1 is activated and a vehicle V is connected as a charging / discharging target, the charging / discharging device 1 must notify the upper device 29 of minimum and maximum values ​​of four items (hereinafter referred to as the four items), namely, a charging power value, a discharging power value, a charging current value, and a discharging current value, whenever possible. The minimum and maximum values ​​of the four items include values ​​(hereinafter referred to as the specification values) that are determined as specifications of the charging / discharging device 1 or the charging / discharging circuit 10, and values ​​(hereinafter referred to as the actual values) that are determined by the state of the on-board charging / discharging control device 32 and the power storage device 30 of the vehicle V. The former specification values ​​of the charging / discharging device 1 are stored as invariant values ​​in the non-volatile memory of the control unit 11. The latter actual values ​​depending on the vehicle V and its state are sequentially acquired or calculated by the control unit 11 based on data transmission / reception with the vehicle V, the charging rate, etc. The charging / discharging device 1 of this embodiment uses these values ​​to determine the minimum and maximum values ​​of the four items according to the procedure shown in the following flowchart, and notifies the upper device 29.

[0035] 3 and 4 are flowcharts showing an example of a processing procedure by the control unit 11 of the charging / discharging device 1. When the control unit 11 of the charging / discharging device 1 is started in response to an ON operation from the operation unit 14 or the start of power supply from the power supply unit 13 based on a schedule, the control unit 11 executes the following processing based on the computer program 1P.

[0036] The control unit 11 starts up and stores the specification values ​​of the charging / discharging device 1 as the minimum and maximum setting values ​​of the four items to be notified until the connection with the vehicle V is confirmed (step S101).

[0037] The control unit 11 judges whether or not a read request for the four numerical values ​​has been received from the higher-level device 29 (step S102). If it is judged that a read request has been received (S102: YES), the control unit 11 notifies the higher-level device 29 of the specification values ​​set as the setting values ​​in step S101 from the higher-level communication unit 16 (step S103).

[0038] If it is determined that the signal has not been received (S102: NO), the control unit 11 advances the process to the next step S104.

[0039] The control unit 11 determines whether or not a connection with the vehicle V is detected by the connector 15 (step S104). If it is determined that a connection is not detected (S104: NO), the control unit 11 returns the process to step S102.

[0040] If it is determined in step S104 that a connection has been detected (S104: YES), the control unit 11 determines whether or not a START instruction has been received from the operation unit 14 or the higher-level device 29 (step S105). If it is determined that a START instruction has not been received (S105: NO), the control unit 11 returns the process to step S105 and waits until a START instruction is received. If a read request is received from the higher-level device 29 during the wait, the control unit 11 may notify the specification values ​​set in step S101.

[0041] When it is determined that the START command has been received (S105: YES), the control unit 11 starts a communication process to establish a communication connection with the in-vehicle charge / discharge control device 32 by the communication unit 12 (step S106). Here, the communication connection is, for example, CAN communication.

[0042] The control unit 11 acquires data such as the state of charge (SOC), the upper limit charging state of charge, the lower limit discharging state of charge, the minimum charging current value, and the minimum discharging current value of the power storage device 30 of the vehicle V from the on-board charge / discharge control device 32 (step S107). In step S107, the control unit 11 may acquire not only data that can be acquired by the communication unit 12, but also data that can be specified by signal processing during the predetermined connection processing in step S106.

[0043] The control unit 11 turns on the locks of the connectors 15 and 35 (step S108).

[0044] The control unit 11 uses the data acquired in step S107 or determines the minimum and maximum values ​​of the four items based on newly acquired data (step S109).

[0045] The control unit 11 stores the value determined in step S109 as a set value (step S110). In step S110, the set value is overwritten with an actual value determined based on the data acquired from the vehicle V from the specification value.

[0046] The control unit 11 notifies the upper device 29 of the set actual value through the upper communication unit 16 (step S111). In step S111, the control unit 11 may notify the upper device 29 in response to a read request received from the upper device 29, rather than by push notification to the upper device 29. The control unit 11 successively notifies the upper device 29 of the latest actual value stored as a set value.

[0047] In step S111, the charge / discharge device 1 may notify the upper device 29 of the minimum and maximum values ​​of the four items that include values ​​different from the specification values ​​determined by the specifications of the charge / discharge device 1.

[0048] The control unit 11 judges whether or not a stop instruction has been received from the higher-level device 29 (step S112). If it is judged that a stop instruction has been received (S112: YES), the control unit 11 advances the process to step S124 described later.

[0049] If it is determined that the stop instruction has not been received (S112: NO), the control unit 11 determines whether or not a STOP operation has been performed on the operation unit 14 (step S113). If it is determined that a STOP operation has been performed (S113: YES), the control unit 11 advances the process to step S124 described below.

[0050] If it is determined that the STOP operation has not been performed (S113: NO), it is determined whether or not a charge instruction or a discharge instruction has been received from the higher-level device 29 (step S114). If it is determined that a charge instruction or a discharge instruction has not been received (S114: NO), the control unit 11 returns the process to step S109.

[0051] When it is determined that a charge instruction or a discharge instruction has been received (S114: YES), the control unit 11 starts charging or discharging based on the instruction (continues charging or discharging if already started) (step S115). When the control unit 11 starts charging or discharging, it acquires data such as the charging rate, the maximum charging current value, the minimum charging current value, the maximum discharging current value, and the minimum discharging current value from the on-board charge / discharge control device 32 of the vehicle V (step S116). In step S116, only data (charging rate) that differs from the data that can be acquired at the timing of step S107 may be acquired from the on-board charge / discharge control device 32 by the communication unit 12.

[0052] Based on the data acquired in step S116, the control unit 11 determines the maximum charging power value, the minimum charging power value, the minimum discharging power value, the maximum discharging power value, the minimum charging current value, the maximum charging current value, the minimum discharging current value, and the maximum discharging current value (step S117). In step S117, only values ​​that are changed by the data acquired in step S116 may be calculated. For example, the control unit 11 may calculate only the maximum or minimum values ​​of the charging power value and the charging current value if charging is in progress.

[0053] The control unit 11 stores the determined value as a set value (step S118). In step S118, the set value is overwritten with an actual value calculated based on the latest data acquired from the vehicle V.

[0054] The control unit 11 notifies the upper device 29 of the set actual value through the upper communication unit 16 (step S119). Also in step S119, the control unit 11 may notify the upper device 29 only when a read request is received from the upper device 29, instead of sending a push notification to the upper device 29.

[0055] The control unit 11 judges whether or not to continue receiving a charge instruction or a discharge instruction from the higher-level device 29 (step S120). If it is judged that the instruction is to continue to be received (S120: YES), the control unit 11 returns the process to step S115 and continues charging or discharging. While the charge instruction is being received from the higher-level device 29, charging is continued, and when an instruction to switch to discharging is received, discharging is started.

[0056] If it is determined that a charge command or a discharge command has not been received (S120: NO), the control unit 11 determines whether to stop charging or discharging (step S121). In step S121, the control unit 11 determines to stop charging or discharging when a standby command has been received from the higher-level device 29 or when a stop condition is satisfied. The stop condition is, for example, when the charge rate of the power storage device 30 of the vehicle V becomes fully charged (above a charging upper limit charge rate) during charging, or conversely, when the charge rate of the power storage device 30 becomes below a discharging lower limit charge rate during discharging.

[0057] If it is determined in step S121 that the operation should be stopped (S121: YES), the control unit 11 returns the process to step S109, and the operation goes into a standby state.

[0058] If it is determined in step S121 that the operation should not be stopped (S121: NO), neither a charge command nor a discharge command has been received, and the stop condition is not satisfied, so the control unit 11 waits until these commands or the stop condition are satisfied. The control unit 11 determines whether or not a stop command has been received from the higher-level device 29 (step S122). If it is determined that a stop command has been received (S122: YES), the control unit 11 advances the process to step S124 described below.

[0059] If it is determined that the stop instruction has not been received (S122: NO), the control unit 11 determines whether or not a STOP operation has been performed on the operation unit 14 (step S123). If it is determined that the STOP operation has not been performed (S123: NO), neither a stop instruction has been received nor a STOP operation has been performed. In this case, the control unit 11 returns the process to step S116 and waits until an instruction is received or a stop condition is satisfied while determining new data.

[0060] If it is determined in step S123 that the STOP operation has been performed (S123: YES), the control unit 11 cuts off the communication connection with the on-board charge / discharge control device 32 of the vehicle V (step S124). The control unit 11 turns off the locks of the connectors 15 and 35 (step S125). The control unit 11 sets the minimum and maximum values ​​of the four items to the specification values ​​of the charge / discharge device 1, i.e., stores them as set values ​​(step S126), and ends the process. After step S126, the charge / discharge device 1 is in a stopped state.

[0061] Instead of the process of step S125, the memory of the setting value may be reset. Step S126 may be skipped so that the data of the setting value is not retained until the next startup.

[0062] Also, in the processing from step S124 to step S126, the communication connection may be cut off but the lock may be maintained ON and the processing may be restarted from step S101.

[0063] 3 and 4, it has been described that the communication connection between the charging / discharging device 1 and the on-board charging / discharging control device 32 of the vehicle V is not established each time even in the standby state. However, if an instruction to stop charging / discharging is received in step S121 (S121: YES), the communication connection may be temporarily disconnected. In this case, even if the process returns to step S109, the control unit 11 cannot acquire data from the vehicle V. However, even in this state, until the locks of the connectors 15 and 35 are turned OFF, that is, while the control unit 11 is connected to the same vehicle V, the control unit 11 may hold the minimum and maximum values ​​of the four items stored as setting values ​​and notify the host device 29 of the latest values.

[0064] In this way, the charging / discharging device 1 between the higher-level device 29 that controls charging / discharging of the entire system including the vehicle V and the on-board charging / discharging control device 32 that controls charging / discharging at the vehicle V, as described above, accurately notifies the higher-level device 29 of the power value (current value) that can be output in actual charging / discharging at the vehicle V. The accurate notification enables the higher-level device 29 to appropriately identify and control the power storage device 30 of the vehicle V as a charging / discharging destination. It is possible to avoid a situation in which charging / discharging cannot actually be started at the power value or current value according to the specifications at the power storage device 30 of the vehicle V, and the higher-level device 29 cannot use the power storage device 30.

[0065] The processing procedures in steps S109 and S117 will be described in detail. Fig. 5 is a flow chart showing an example of a procedure for determining the minimum and maximum values ​​of the four items. The following procedure is merely an example and is not limited to the following content, and only a part of it may be used, or a combination of parts of it may be used.

[0066] Based on the acquired data, the control unit 11 identifies characteristics of the vehicle type, year, or manufacturer of the vehicle V, which are correlated with the charging and discharging characteristics (step S201). In step S201, the control unit 11 may store data that can be acquired by the communication unit 12 in advance by vehicle type, year, or manufacturer, and identify the data with matching content. The data includes minimum charging and discharging current value, upper current limit value and lower current limit value, lower discharge limit battery charging rate, upper charge limit battery charging rate, upper charge limit voltage, lower discharge limit voltage, upper battery endurance limit value, etc. The control unit 11 may also identify the data by other characteristics such as response speed in the connection process leading up to communication connection.

[0067] The control unit 11 judges whether or not the vehicle V is a charge-only vehicle (step S202). When it is judged that the vehicle V is a charge-only vehicle (S202: YES), the control unit 11 determines the minimum and maximum values ​​of the four items for the charge-only vehicle according to the characteristics identified in step S201 (step S203), and ends the process. The control unit 11 may store the minimum and maximum values ​​of the four items in advance in memory in association with whether or not the vehicle is a charge-only vehicle, and select according to whether or not the vehicle is a charge-only vehicle. Even if the vehicle is a charge-only vehicle, it may store the minimum and maximum values ​​of the four items in advance in memory in association with information indicating which manufacturer, when, and what type of vehicle the charge-only vehicle is, and select according to the characteristics that can be identified.

[0068] In step S203, since discharging is not possible, the control unit 11 determines the discharge power value and discharge current value to be the specification values, and determines the minimum value of the charging power value to be a value according to the characteristics of the vehicle model, etc., including zero. The control unit 11 may store the minimum and maximum values ​​of the four items in advance in memory in association with the characteristics of the vehicle model, etc., and select according to the characteristics that can be specified. The minimum value is not limited to zero, and may be determined to be the minimum value determined on the vehicle V side. The control unit 11 may similarly determine the minimum value of the charging current value by calculating a value converted into a current value.

[0069] If it is determined in step S202 that the vehicle is not a charge-only vehicle (S202: NO), the control unit 11 determines the minimum and maximum values ​​using the data corresponding to each of the four items (step S204), and ends the process.

[0070] In step S204, the control unit 11 may determine the charging power value and the charging current value using, for example, upper or lower limit data related to charging obtained from the vehicle V, or the charging rate. The control unit 11 may determine the maximum value of the discharge power value and the discharge current value using, for example, upper or lower limit data related to discharging obtained from the vehicle V. The minimum value may be a numerically extremely small value, for example, zero, or may be a minimum value taking into account a margin according to the vehicle type, etc.

[0071] In step S204, the control unit 11 may select an appropriate calculation method for deriving the outputtable power value or current value depending on the state of the power storage device 30.

[0072] The embodiments disclosed above are illustrative in all respects and are not restrictive. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0073] 1 Charge / discharge device 10 Charge / discharge circuit 11 Control section 12 Communications Department 14 Control section 16 Upper communication section 1P Computer Program V Vehicle 29 Upper device 32 Vehicle charge / discharge control device

Claims

1. a control unit that determines whether or not the vehicle is connected to an on-board storage battery provided in the vehicle and controls charging and discharging of the on-board storage battery; a communication unit that communicates with an on-board control device that controls charging and discharging of the on-board storage battery on the vehicle side; storing vehicle information including information on the in-vehicle storage battery acquired by the communication unit; determining a part of information regarding charging and discharging the vehicle-mounted storage battery based on the stored vehicle information; storing the determined portion of the information; a notification unit that notifies a higher-level control device of information related to charging and discharging of the in-vehicle storage battery, the information including a part of the vehicle information and the part of the determined information; Equipped with When communication with the on-board control device is disconnected at a timing when information regarding charging and discharging of the on-board storage battery needs to be notified to the upper control device, the control unit causes the notification unit to notify information regarding charging and discharging of the on-board storage battery, including the latest stored value, while the connection with the vehicle is maintained. Charge / discharge device.

2. When the control unit receives a request from the upper control device, the control unit causes the notification unit to notify information related to charging and discharging of the in-vehicle storage battery, the information including a portion of vehicle information most recently received and stored from the in-vehicle control device and a portion of the information determined based on the most recently received vehicle information. The charging / discharging device according to claim 1 .

3. When a charge / discharge state of the vehicle-mounted storage battery changes, the control unit notifies the notification unit of information related to the charge / discharge of the vehicle-mounted storage battery, the information including a portion of vehicle information most recently received from the vehicle control device and stored and a portion of the information determined based on the most recently received vehicle information. The charging / discharging device according to claim 1 .

4. The control unit receives and stores the vehicle information from the vehicle control device in a state where charging / discharging is not started after the connection with the vehicle-mounted storage battery is detected. The charging / discharging device according to claim 1 .

5. The control unit determines whether or not a connector is connected to an on-board power line that is connected to the on-board storage battery by checking an electrical connection between the on-board control device and the on-board control device. The charging / discharging device according to claim 1 .

6. The control unit locks the connector while the vehicle-mounted storage battery is connected to the connector and is in a standby state in which no charging or discharging is being performed. The charging / discharging device according to claim 5.

7. The control unit determines whether or not a connector is connected to an on-board power line that is connected to the on-board battery, using a user operation as a trigger. The charge / discharge device according to claim 1 .

8. The control unit acquires the vehicle information by communicating with the in-vehicle control device while the control unit is in a standby state in which no charging or discharging is being performed and the in-vehicle storage battery is connected to the in-vehicle storage battery via a connector. The charge / discharge device according to claim 1 .

9. A method for controlling charging and discharging of an on-board storage battery provided in a vehicle, the method comprising: The charging / discharging device is using a communication unit that communicates with an on-board control device that controls charging and discharging of the on-board storage battery on the vehicle side, storing vehicle information including information on the on-board storage battery acquired by the communication unit; determining a part of information regarding charging and discharging the vehicle-mounted storage battery based on the stored vehicle information; storing the determined portion of the information; When a communication connection with the vehicle-mounted control device is cut off at a timing when information regarding charging and discharging of the vehicle-mounted storage battery needs to be notified to a higher-level control device, the information regarding charging and discharging of the vehicle-mounted storage battery, including the latest stored value, is notified to the higher-level control device while the connection with the vehicle is maintained.

10. A computer mounted on a charging / discharging device connected to an on-board power line connected to an on-board storage battery provided in a vehicle, Acquire vehicle information including information on the on-board storage battery using a communication unit that communicates with an on-board control device that controls charging and discharging of the on-board storage battery on the vehicle side; storing the acquired vehicle information; determining a part of information regarding charging and discharging the vehicle-mounted storage battery based on the stored vehicle information; storing the determined portion of the information; When a communication connection with the vehicle-mounted control device is cut off at a timing when information regarding charging and discharging of the vehicle-mounted storage battery needs to be notified to a higher-level control device, the information regarding charging and discharging of the vehicle-mounted storage battery, including the latest stored value, is notified to the higher-level control device while the connection with the vehicle is maintained. A computer program that executes a process.

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