Method for charging and discharging automotive batteries, charging and discharging program, and charging and discharging system.
The method addresses repeated communication disruptions in vehicle battery charging by automatically re-establishing connections based on restart events, maintaining stable power management.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- DIAMOND&ZEBRA ELECTRIC MFG CO LTD
- Filing Date
- 2025-01-08
- Publication Date
- 2026-07-21
AI Technical Summary
Existing systems face repeated communication release and reconnection issues when receiving normal stop signals for charging and discharging in-vehicle batteries, leading to continuous minute states and repeated stop instructions.
A method involving establishing communication, stopping charging/discharging upon receiving a normal stop signal, and automatically re-establishing communication based on predetermined charge/discharge restart events.
Maintains continuous charging and discharging operations by avoiding repeated stop and start cycles, ensuring stable power management even after normal stop signals.
Smart Images
Figure 2026119998000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a charging and discharging method, a charging and discharging program, and a charging and discharging system.
Background Art
[0002] With the spread of electric vehicles, in recent years, technical development has been promoted to effectively utilize the power of in-vehicle batteries.
[0003] For example, Patent Document 1 discloses a charging and discharging device that acquires battery information regarding the upper limit value and the lower limit value of the SOC of an in-vehicle battery from an electric vehicle and performs a charging and discharging operation in a charging and discharging band from a discharge limit value to a charging limit value.
[0004] As described in Patent Document 1, when the SOC of an in-vehicle battery of a general electric vehicle reaches a predetermined upper limit value or a predetermined lower limit value, a stop signal regarding normal stop is transmitted to the charging and discharging device. In the charging and discharging device that has received the stop signal regarding normal stop, the connection between the in-vehicle battery and the charging and discharging device is released.
Prior Art Documents
Patent Documents
[0005]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0006] In order to maintain an operation mode in which charging and discharging to the in-vehicle battery of a vehicle is continuous, every time the charging and discharging device receives a stop signal regarding normal stop from the vehicle, it is conceivable to once release the communication of the vehicle and then re-establish the communication and reconnect. However, even if reconnection is performed, since the charging and discharging continues in a minute state, a stop instruction will be sent again. That is, there is a problem that the release and reconnection of the communication of the vehicle are repeated.
[0007] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]
[0008] In a first aspect of the present invention, the method for charging and discharging an on-board battery mounted in a vehicle includes: a first step of establishing communication with the vehicle and charging and discharging the on-board battery based on the user's charge / discharge settings; a second step of discontinuing communication with the vehicle and stopping the charging and discharging of the on-board battery when a normal stop signal is received from the vehicle after a normal charge or discharge related to the first step; and a third step of automatically re-establishing communication with the vehicle and resuming charging and discharging of the on-board battery based on the charge / discharge restart event if a predetermined charge / discharge restart event occurs after the second step. [Effects of the Invention]
[0009] According to the present invention, even if the system is designed to terminate communication due to the reception of a normal stop signal for charging and discharging from the vehicle, the vehicle's charging and discharging mode can be maintained. [Brief explanation of the drawing]
[0010] [Figure 1] Block diagram showing the overall configuration of the charging and discharging system. [Figure 2] Flowchart showing an example of the operation of a charging and discharging system [Figure 3] Flowchart showing an example of the operation of a charging and discharging system [Figure 4] Sequence diagram showing an example of the operation of the charge / discharge system. [Figure 5] A diagram illustrating the operation and effects of the charging and discharging system. [Figure 6] Block diagram showing another example of the overall configuration of a charge / discharge system. [Figure 7] Block diagram showing other overall configuration examples of a charge / discharge system. [Modes for carrying out the invention]
[0011] Embodiments of the present invention will be described in detail below with reference to the drawings. The following description of preferred embodiments is essentially illustrative and is not intended to limit the present invention, its scope, or its uses. Furthermore, the following description will focus on configurations relevant to the present invention.
[0012] In the following explanation, the operating mode in which power is supplied to the battery to charge it will be called "charging mode," and the operating mode in which power is extracted by discharging the battery will be called "discharging mode." Furthermore, when describing both charging and discharging modes together, they may be collectively referred to as "charge / discharge modes." Additionally, "charge / discharge" may be used as a general term to refer to "charging or discharging." Similarly, "charge / discharge operation" may be used as a general term to refer to "charging operation or discharging operation."
[0013] Figure 1 shows an example of the configuration of the power management system 1.
[0014] The power management system 1 includes a solar panel 3, a stationary battery 4, a vehicle-mounted battery 51, a V2H (Vehicle to Home) stand 20, a power conditioner 10, an in-house load Z, a remote controller 6, and a wireless communication unit 7.
[0015] The stationary battery 4 is a stationary battery installed in homes, various facilities, etc., and is connected to a DC bus DB via a DC / DC converter 31 for stationary batteries. The DC / DC converter 31 is configured to operate in both a discharge mode and a charge mode for the stationary battery 4. In charge mode, the DC / DC converter 31 steps down the bus voltage of the DC bus DB and outputs charging power to the stationary battery 4, while in discharge mode, it converts the output voltage of the stationary battery 4 to a predetermined voltage and outputs it to the DC bus DB. The DC / DC converter 31 may be built into the stationary battery 4 or the power conditioner 10.
[0016] The in-vehicle battery 51 is a battery mounted on a vehicle such as an electric vehicle and used as a power source for the vehicle, and is connected to the DC bus DB via the V2H stand 20.
[0017] The V2H stand 20 includes a DC / DC converter 21 for the in-vehicle battery and a V2H controller 22. The V2H stand 20 is configured to be able to operate in a discharge mode (hereinafter simply referred to as "discharge mode") with respect to the in-vehicle battery 51 and a charge mode (hereinafter simply referred to as "charge mode") with respect to the in-vehicle battery 51. In the discharge mode, the V2H stand 20 converts the discharge power output from the in-vehicle battery 51 to a predetermined voltage and outputs it to the DC bus DB. In the charge mode, the V2H stand 20 steps down the bus voltage of the DC bus DB and supplies it to the in-vehicle battery 51 as charging power.
[0018] The DC / DC converter 21 performs a step-down operation with respect to the bus voltage of the DC bus DB and outputs charging power to the in-vehicle battery 51 in the charge mode, while converting the output voltage of the in-vehicle battery 51 to a predetermined voltage and outputting it to the DC bus DB in the discharge mode. The V2H controller 22 controls the charging and discharging of the in-vehicle battery 51 by controlling the DC / DC converter 21.
[0019] The V2H controller 22 has a function of controlling the charging and discharging of the in-vehicle battery 51 based on one or more events (hereinafter also referred to as "events") selected from the following groups (1) to (4): (1) the generated power information of the solar panel 3, (2) the charge-discharge settings by the user, (3) the state change of the stationary battery 4, and (4) the fluctuation of the power consumption at the home load Z. Here, the charge-discharge setting is, for example, a default mode setting preset in the V2H stand 20 based on factors such as time and the remaining amount of the battery. Also, the charge-discharge setting may include, for example, a mode selection for the in-vehicle battery 51 to select which mode among the charging mode / discharging mode / automatic operation mode to operate in. Further, the charge-discharge setting may include setting the charging power value / setting the discharging power value. In the automatic operation mode, automatic control may be performed using artificial intelligence (AI) to reduce the electricity bill. Specifically, for example, in the automatic operation mode, based on the data accumulated in the past, the power generation amount of the solar panel 3 at the installation location and the power consumption amount at the home load Z are predicted, and the charging and discharging of the in-vehicle battery 51 are controlled according to the prediction results so as to optimize the electricity bill.
[0020] Furthermore, the V2H controller 22 may be configured to apply the additional setting received from the user via the remote controller 6 or the wireless communication unit 7 with higher priority than the aforementioned charge-discharge setting (default setting). That is, the V2H controller 22 may be configured to control the charging and discharging of the in-vehicle battery 51 or stop the charging and discharging based on the additional setting when the additional setting is received. The specific content of the additional setting is not particularly limited. The user setting information may be the same as the default setting or different from the default setting.
[0021] The V2H controller 22 can be implemented, for example, by a so-called microcontroller (microcomputer). Specifically, the functions of the V2H controller 22 are realized, for example, by a control unit such as a processor or controller executing a program stored in memory or the like. Alternatively, the functions of the V2H controller 22 may be implemented by an FPGA or by logic circuits such as a sequencer. The control units such as processors and controllers, FPGAs, and logic circuits such as sequencers that constitute the V2H controller 22 are examples of the computer described in this disclosure. The same applies to the controller 13, which will be described later. An example of the operation of the V2H controller 22 will be explained again later.
[0022] The power conditioner 10 includes a DC / DC converter 11 for the solar cells, an AC / DC inverter 12, and a controller 13. The power conditioner 10 is configured to operate in a discharge mode for the solar cells and storage batteries, and a charging mode for the storage batteries. More specifically, in discharge mode, it receives power generated by the solar panel 3, power stored in the stationary storage battery 4, and / or power stored in the vehicle storage battery 51 as input, converts it to AC power, and outputs it to the household load Z. In charging mode, it receives power generated by the solar panel 3 as input, converts the voltage of the converted power obtained by the DC / DC converter 11, and / or converts the AC power input from the grid power supply Q to DC power using the AC / DC inverter 12, and supplies that converted power to the stationary storage battery 4 and / or the vehicle storage battery 51.
[0023] The DC / DC converter 11 converts the output voltage of the solar panel 3 to a predetermined voltage and outputs it to the DC bus DB. The solar panel 3 and the DC / DC converter 11 are connected by circuit L1.
[0024] In charging mode, the AC / DC inverter 12 converts the AC input from the grid power supply Q to DC and outputs it to the DC bus DB. In discharging mode, it converts the bus voltage of the DC bus DB to AC and outputs it to the in-house load Z. The grid power supply Q and the AC / DC inverter 12 are connected by circuit L2. The in-house load Z is connected to the grid power supply Q and the AC / DC inverter 12 via circuit L2.
[0025] The controller 13 has the function of controlling the overall operation of the power management system 1. Specifically, it has the function of controlling the charging and discharging of the on-board battery 51 and / or stationary battery 4 based on (1) power generation information of the solar panel 3, (2) charge / discharge settings by the user, (3) changes in the state of the on-board battery 51 and / or stationary battery 4, and (4) fluctuations in power consumption at the household load Z. The charging and discharging control of the stationary battery 4 by the controller 13 can be done, for example, by controlling the DC / DC converter 21 via the V2H controller 22.
[0026] Furthermore, the controller 13 may have a function to control the power input to the power conditioner 10 so that only the stationary battery 4 is charged, according to predetermined settings. Alternatively, it may be configured to set the charge / discharge ratio of the stationary battery 4 and the vehicle-mounted battery 51 according to predetermined settings, and to perform charging and discharging of the stationary battery 4 and the vehicle-mounted battery 51 according to the set ratio. In the case of no power generation information for the solar panel 3, the controller 13 may control the charging and discharging of the vehicle-mounted battery 51 and the stationary battery 4 based on mode setting information for setting the charge / discharge modes of the vehicle-mounted battery 51 and the stationary battery 4, as well as the power consumption at the household load Z. Cases where there is no power generation information for the solar panel 3 include cases where the solar panel 3 is not connected and cases where the solar panel 3 is not operating, such as during nighttime hours.
[0027] Furthermore, the controller 13 may be configured to prioritize and apply user setting information over the aforementioned charge / discharge setting information (default setting) when user setting information is acquired as a predetermined setting via the remote controller 6 or the wireless communication unit 7. That is, when user setting information is acquired, the controller 13 may be configured to control the charging and discharging of the stationary battery 4 and the on-board battery 51 based on the user setting information. The specific contents of the user setting information are not particularly limited, but may include, for example, information to set so that only the stationary battery is charged and discharged, information to set the charge / discharge ratio between the stationary battery and the on-board battery, and setting information indicating the priority of charging and discharging, whether to prioritize the stationary battery or the on-board battery. The user setting information may be the same as the default setting, or it may be different from the default setting.
[0028] The remote controller 6 and the wireless communication unit 7 function as reception units that accept charge and discharge settings from the user. The remote controller 6 is installed in the home, for example, in the same location as the in-house load Z, and accepts user input operations regarding user setting information via mechanical push buttons, touch sensors, touch panels, etc. The wireless communication unit 7 receives user setting information and event instructions wirelessly from wireless transmission means such as a tablet 8 or a smartphone 9. For example, as an event instruction, it may receive instructions to control the charging and discharging of the on-board battery 51 in order to optimize electricity costs by using artificial intelligence (AI) to predict the amount of power generated by the solar panels 3 at the installation site and the amount of power consumed by the in-house load Z based on previously accumulated data.
[0029] -Example of a power management system in operation- Next, an example of the operation of the power management system 1 will be explained with reference to Figures 2 to 5. The charging and discharging method shown below is realized, for example, by the V2H controller 22 (equivalent to a computer) executing a charging and discharging program stored in memory.
[0030] In step S10, when the charging cable of the V2H station is connected to the charging connector (not shown) of the vehicle 5 and the user performs the charge / discharge setting operation, the V2H controller 22 establishes communication with the vehicle's onboard communication unit 52. Communication between the communication unit 23 and the vehicle's onboard communication unit 52 is performed, for example, in accordance with a predetermined communication protocol (e.g., CAN). Then, based on the user's charge / discharge setting, the charging or discharging operation of the vehicle's battery 51 is started. More specifically, as shown in Figure 4, when the user sets the charge / discharge setting on the operation terminal, the charge / discharge setting information is transmitted to the V2H station 20 via the controller 13 of the power conditioner 10. Examples of the operation terminal here include the remote controller 6, tablet 8, and smartphone 9 mentioned above. When the charge / discharge setting information is received from the controller 13, the V2H controller 22 establishes communication with the vehicle's onboard communication unit 52 and starts the charging or discharging operation of the vehicle's battery 51 based on the charge / discharge setting.
[0031] Step S1 is a conditional branching process regarding whether or not an abnormal stop signal is received from vehicle 5. The abnormal stop signal can be determined, for example, based on the state of a specific signal line, data sequence, register, etc., when communication is performed in accordance with a predetermined communication protocol (e.g., CAN). If an abnormal stop signal is received from vehicle 5, the flow proceeds to step S11 in Figure 3. If no abnormal stop signal is received from vehicle 5, the flow proceeds to the next step S2.
[0032] In step S11, communication between the V2H stand 20 and the vehicle 5 is terminated, and the charging and discharging operation of the on-board battery 51 is stopped. Specifically, communication between the on-board communication unit 52 and the communication unit 23 of the V2H stand 20 is terminated. Also, the charging and discharging operation of the on-board battery 51 by the DC / DC converter 21 is stopped. In the next step S12, the V2H stand 20 performs abnormal stop processing. Specifically, it displays an indication of abnormal stop, and transmits externally that it has received an abnormal stop signal from the vehicle 5, notifying the user. The external recipient is not particularly limited, but examples include the controller 13, remote controller 6, and / or tablet 8, smartphone 9, etc. The method of notifying the user is not particularly limited, but examples include screen display, illumination / flashing of an illumination unit (not shown), alarm sound, or voice notification. When abnormal stop processing is performed, i.e., when an abnormal stop state is reached, the system will not recover unless a recovery operation is performed by the user or a repair worker such as the manufacturer. In other words, if an abnormal stop occurs, the V2H stand 20 will not automatically resume charging / discharging operations or automatically re-establish communication with the vehicle 5.
[0033] Returning to Figure 2, step S2 is a conditional branching process regarding whether or not an abnormal stop has occurred at the V2H stand 20. If an abnormal stop has occurred at the V2H stand 20, the flow proceeds to steps S11 and S12 described above. Specifically, as explained above, in step S11, communication between the V2H stand 20 and vehicle 5 is terminated. In step S12, the V2H stand 20 performs an abnormal stop process. The specific details of the process are as described above. An example of an abnormal stop at the V2H stand 20 is when an abnormality is detected inside the V2H stand 20. Specifically, an abnormal stop due to overcurrent or overvoltage is an example.
[0034] Step S3 is a conditional branching process regarding whether or not a normal shutdown operation has been performed at the V2H station 20. A normal shutdown operation at the V2H station 20 includes, for example, the case where an operation is performed to request the cessation of charging and discharging to the on-board battery 51 as an additional setting by the user as described above. If a normal shutdown operation at the V2H station 20 is accepted, the flow proceeds to step S31 in Figure 3. On the other hand, if a normal shutdown operation at the V2H station 20 has not been accepted, the flow proceeds to the next step S4.
[0035] In step S31, communication between the V2H stand 20 and the vehicle 5 is terminated, and the charging and discharging operation of the on-board battery 51 is stopped. Specifically, communication between the on-board communication unit 52 and the communication unit 23 of the V2H stand 20 is terminated. Also, the charging and discharging operation of the on-board battery 51 by the DC / DC converter 21 is stopped. In the next step S32, the V2H stand 20 performs a normal shutdown process. Once in a normal shutdown state, it will not resume charging and discharging operation unless the user performs a restart operation. In other words, once in a normal shutdown state, the V2H stand 20 will not automatically restart charging and discharging operation or automatically re-establish communication with the vehicle 5. Examples of user restart operations for charging and discharging operation include (1) an operation related to requesting the execution of charging and discharging as an additional setting, and (2) an operation by the user to cancel the normal shutdown operation (additional setting).
[0036] Step S4 is a conditional branching process regarding the presence or absence of a normal stop signal output from vehicle 5. A normal stop signal can be determined, for example, based on the state of a specific signal line, data sequence, register, etc., when communication is performed in accordance with a predetermined communication protocol (e.g., CAN). Vehicle 5 may output a normal stop signal, for example, if the charge / discharge current or discharge current remains below a predetermined reference current (e.g., 0[A]) for a predetermined period (e.g., about 5 minutes) during the charging or discharging operation of the on-board battery. In other words, the V2H station 20 may receive a normal stop signal from vehicle 5 after normal charging or discharging of the on-board battery 51. Note that whether or not a normal stop signal is output, and the output conditions if a normal stop signal is output, may differ depending on the vehicle type and manufacturer of vehicle 5. If a normal stop signal is received from vehicle 5, the flow proceeds to step S41 in Figure 3. If no abnormal stop signal is received from vehicle 5, the flow proceeds to the next step S5.
[0037] Step S41 is a conditional branching process to determine whether a predetermined charging restart determination condition is met. The charging restart determination condition includes, for example, whether a charging / discharging restart event occurs after a predetermined period of time during the charging or discharging operation of the on-board battery 51, where the magnitude of the charging / discharging current or discharge current flowing was less than a predetermined reference current. If the predetermined charging restart determination condition is met in step S41, the flow proceeds to step S42 in Figure 3. On the other hand, if the predetermined charging restart determination condition is not met, the flow proceeds to step S31 in Figure 3. The operation of step S31 is as described above.
[0038] In step S42, communication between the V2H stand 20 and the vehicle 5 is terminated, and the charging and discharging operation of the onboard battery 51 is stopped. Specifically, communication between the onboard communication unit 52 and the communication unit 23 of the V2H stand 20 is terminated. In addition, the charging and discharging operation of the onboard battery 51 by the DC / DC converter 21 is stopped.
[0039] The next step, S43, is a conditional branching process that determines whether a predetermined charge / discharge restart event has occurred. The determination in step S43 is repeated until the predetermined charge / discharge restart event occurs. If the predetermined charge / discharge restart event occurs, the flow proceeds to the next step, S44. The charge / discharge restart event is one or more events selected from the group consisting of: a change in the amount of power generated by the solar power generation system configured to enable charging of the on-board battery; an operation setting at a predetermined time set in the power conditioner 10; a change in the storage state of the stationary battery 4 configured to exchange power with the on-board battery 51; and the occurrence of an additional setting operation by the user.
[0040] In step S44, the V2H stand 20 automatically re-establishes communication with the vehicle 5 and resumes charging and discharging control to the onboard battery based on the charge / discharge restart event. The method for establishing communication can be the same as in step S10. For example, the communication unit 23 of the V2H stand 20 establishes communication with the onboard communication unit 52.
[0041] An example of charge / discharge control based on charge / discharge restart events is described below. For example, the V2H controller 22 of the V2H station 20 determines that a charge / discharge restart event has occurred when the amount of power generated by the solar power generation device increases. In this case, the communication unit 23 automatically re-establishes communication with the on-board communication unit 52, and the V2H controller 22 controls the DC / DC converter 21 to restart charging the on-board battery 51. Also, for example, in the event of a power outage, the V2H controller 22 of the V2H station 20 determines that a discharge restart event has occurred when the power supply is insufficient even after utilizing the amount of power generated by the solar panels 3 and the power of the stationary battery 4. In this case, the communication unit 23 automatically re-establishes communication with the on-board communication unit 52, and the V2H controller 22 controls the DC / DC converter 21 to restart discharging the on-board battery 51. The term "restart" is used to mean the restart of charge / discharge. Specifically, cases where there is a transition from charging to discharging, and cases where there is a transition from discharging to charging, are also included in the concept of charge / discharge restart.
[0042] In this case, for example, if the amount of charge or the charge rate of the on-board battery 51 is above a predetermined standard value, the system may not re-establish communication with the vehicle, that is, it may not resume charging. More specifically, for example, the system may determine whether the on-board battery 51 is close to fully charged based on the amount of charge or the charge rate, and if it is close to fully charged, it may not resume charging. The same applies to discharge. That is, if the charge / discharge resumption event that occurs is a discharge resumption event that discharges the on-board battery, and the amount of charge or the charge rate of the on-board battery 51 is below a predetermined standard value, the system may not re-establish communication with the vehicle, that is, it may not resume discharging.
[0043] In step S5, the charging or discharging operation of the onboard battery 51 continues based on the charge / discharge settings. The flow then returns to step S1, and the flow from step S1 to step S5 is repeated. If a stop operation is received by the user, the V2H station 20 stops operating. After that, when the user disconnects the charging connector from the vehicle 5, the vehicle 5 becomes ready to drive.
[0044] <Summary> As described above, one aspect of this embodiment relates to a charging and discharging method for an on-board battery 51 mounted on a vehicle 5, and this charging and discharging method includes: a first step of establishing communication with the vehicle 5 and charging and discharging the on-board battery 51 based on the user's charging and discharging settings; a second step of discontinuing communication with the vehicle 5 and stopping the charging and discharging of the on-board battery 51 when a normal stop signal is received from the vehicle 5 after a normal charging or discharging of the on-board battery 51 related to the first step; and a third step of automatically re-establishing communication with the vehicle 5 and resuming charging and discharging of the on-board battery 51 based on the charging and discharging restart event if a predetermined charging and discharging restart event occurs after the second step. Examples of charge / discharge restart events include, for example, one or more events selected from the group: a change in the amount of power generated by a solar panel 3 configured to enable charging of the on-board battery 51; operation settings at a predetermined time; fluctuations in the household load Z that receives power from the on-board battery 51; a change in the storage state of a stationary battery 4 configured to exchange power with the on-board battery 51; and the occurrence of additional setting operations by the user.
[0045] According to the above configuration, even if communication is terminated due to the reception of a normal stop signal for charging and discharging from the vehicle 5, the charging and discharging mode of the vehicle 5 can be maintained. Specifically, as described above, the vehicle may output a normal stop signal if, during charging or discharging of the on-board battery 51, the charging / discharging current or discharge current remains below a predetermined reference current for a predetermined period of time. In this case, as a second step, communication with the vehicle 5 is terminated and charging and discharging of the on-board battery 51 is stopped. However, if a predetermined charging / discharging restart event occurs after the second step, a third step is performed in which communication with the vehicle 5 is automatically re-established and charging and discharging of the on-board battery 51 is resumed. As a result, if, for example, an automatic driving mode that automatically charges and discharges is set as the charging / discharging setting, the charging and discharging mode of the vehicle can be maintained without any additional operation by the user.
[0046] In the above embodiment, in the second step, when a normal stop signal is received from the vehicle 5, if the predetermined charging restart determination conditions are met, the operation of the third step is performed. However, if the predetermined charging restart determination conditions are not met, even if a predetermined charge / discharge restart event occurs, communication with the vehicle 5 is not automatically re-established. The predetermined charging restart determination conditions include whether or not a predetermined charge / discharge restart event occurs after a predetermined period of time during the charging or discharging operation of the on-board battery 51, in which the magnitude of the charge / discharge current or discharge current remains below a predetermined reference current.
[0047] For example, the charge / discharge restart event includes a charge restart event to charge the on-board battery 51 and a discharge restart event to discharge the on-board battery 51. If a charge restart event occurs in the third step and the amount of charge or charge level of the on-board battery 51 is above a predetermined standard value, communication with the vehicle 5 may not be re-established. Also, if a discharge restart event occurs in the third step and the amount of charge or charge level of the on-board battery 51 is below a predetermined standard value, communication with the vehicle 5 may not be re-established.
[0048] As described above, by setting conditions for determining when charging should be resumed, it is possible to avoid the resumption of charging and discharging operations in situations where charging and discharging would stop again. This prevents automatic restart / stopping of charging and discharging from occurring repeatedly in a short period of time.
[0049] In the above embodiment, when an abnormal stop signal is received during charging or discharging of the on-board battery 51 in the first step, communication with the vehicle 5 is terminated and the charge / discharge control of the on-board battery 51 is stopped. Furthermore, even if a predetermined charge / discharge restart event occurs after the charge / discharge control has been stopped, communication with the vehicle 5 is not automatically re-established.
[0050] When an abnormal stop signal is received, recovery work may be necessary according to instructions from the user or manufacturer. Therefore, restricting automatic re-establishment of communication can prevent unnecessary operations.
[0051] <Other Embodiments> As described above, embodiments have been explained as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited to these embodiments and can be applied to embodiments that are modified, replaced, added, or omitted as appropriate. Furthermore, it is possible to create new embodiments by combining the components described in the above embodiments.
[0052] For example, in the above embodiment, as shown in Figure 1, an example was shown in which the power conditioner 10 and the V2H controller 22 are provided separately, but the invention is not limited to this. For example, as shown in Figure 7, the functions of the V2H controller 22 may be integrated into the power conditioner 10. In other words, the technology of this disclosure may be implemented in an integrated power conditioner.
[0053] In Figure 7, components corresponding to those in Figure 1 are denoted by the same reference numerals. In Figure 7, the communication unit 23 has the same functions as in the previously described embodiment. Specifically, the communication unit 23 establishes communication with the in-vehicle communication unit 52 based on commands from the controller 13. As described above, communication between the communication unit 23 and the in-vehicle communication unit 52 is performed, for example, in accordance with a predetermined communication protocol (e.g., CAN).
[0054] Furthermore, in the configuration shown in Figure 7, the functions of the V2H controller 22 are integrated into the controller 13. That is, the controller 13 (equivalent to a computer) performs the control operations of the V2H controller 22 in addition to the control operations of the controller 13 according to the above embodiment. In other words, the controller 13 in Figure 7 performs the control related to the first to third steps described above. For example, in addition to the functions of the controller 13 according to the above embodiment, it controls the charging and discharging of the on-board battery 51 by controlling the DC / DC converter 21. The other configurations are the same as in Figure 1, and a detailed explanation of them is omitted here.
[0055] The same effect as in Figure 1 can be obtained even with the configuration shown in Figure 7. [Industrial applicability]
[0056] According to the present invention, even if the system is designed to disconnect communication due to the reception of a normal stop signal for charging and discharging from the vehicle, the vehicle's charging and discharging mode can be maintained, making it extremely useful. [Explanation of Symbols]
[0057] 2. Solar panels (photovoltaic power generation equipment) 3. Stationary battery storage 5 vehicles 13. Controller (computer, control unit) 21 DC / DC converter (power conversion section) 22 V2H Controller (Computer, Control Unit) 51. Onboard battery Z In-home load (load)
Claims
1. A charging and discharging method for an on-board battery installed in a vehicle, which is performed by a computer, A first step involves establishing communication with the vehicle and charging / discharging the on-board battery based on the user's charge / discharge settings, A second step is to terminate communication with the vehicle and stop charging and discharging the vehicle battery after normal charging or discharging of the vehicle battery in the first step, when a normal stop signal is received from the vehicle, A method for charging and discharging an on-board battery, comprising: a third step of automatically re-establishing communication with the vehicle and resuming charging and discharging to the on-board battery based on the charging and discharging restart event if a predetermined charging and discharging restart event occurs after the second step.
2. In the charging and discharging method for an on-board battery according to claim 1, A method for charging and discharging an on-board battery, wherein the charge / discharge restart event is one or more events selected from the group consisting of: a change in the amount of power generated by a solar power generation device configured to enable charging of the on-board battery; operation setting at a predetermined time; fluctuations in the household load receiving power from the on-board battery; a change in the charge state of a stationary battery configured to exchange power with the on-board battery; and the occurrence of an additional setting operation by the user.
3. In the charging and discharging method for an on-board battery according to claim 1, In the second step, when a normal stop signal is received from the vehicle, If the predetermined conditions for determining when to resume charging are met, the operation of the third step is performed, A method for charging and discharging an on-board battery, wherein if the predetermined charging restart determination conditions are not met, the predetermined charging / discharging restart event does not automatically re-establish communication with the vehicle.
4. In the charging and discharging method for an on-board battery according to claim 3, A method for charging and discharging an on-board battery, wherein the predetermined charge restart determination condition includes the condition of whether or not the predetermined charge / discharge restart event occurs after a predetermined period of time during the charging or discharging operation of the on-board battery, in which the magnitude of the charge / discharge current or the discharge current remains below a predetermined reference current.
5. In the charging and discharging method for an on-board battery according to claim 1, A method for charging and discharging an on-board battery, wherein when an abnormal stop signal is received during charging or discharging of the on-board battery in the first step, communication with the vehicle is terminated and the charge / discharge control of the on-board battery is stopped, and even if a predetermined charge / discharge restart event occurs after the stop of the charge / discharge control, communication with the vehicle is not automatically re-established.
6. In the charging and discharging method for an on-board battery according to claim 1, The charge / discharge restart event includes a charge restart event that charges the on-board battery and a discharge restart event that discharges the on-board battery. A method for charging and discharging an on-board battery, wherein if the charging restart event occurs in the third step, and the amount of charge or charge rate of the on-board battery is above a predetermined standard value, communication with the vehicle is not re-established.
7. In the charging and discharging method for an on-board battery according to claim 1, The charge / discharge restart event includes a charge restart event that charges the on-board battery and a discharge restart event that discharges the on-board battery. A charging and discharging method in which, if the discharge restart event occurs in the third step, and the amount of charge or charge rate of the on-board battery is below a predetermined standard value, communication with the vehicle is not re-established.
8. A charge / discharge program for charging and discharging an on-board battery installed in a vehicle, On the computer, A first step involves establishing communication with the vehicle and charging / discharging the on-board battery based on the user's charge / discharge settings, A second step is to terminate communication with the vehicle and stop charging and discharging the vehicle battery after normal charging or discharging of the vehicle battery in the first step, when a normal stop signal is received from the vehicle, A charge / discharge program that, after the second step, if a predetermined charge / discharge restart event occurs, automatically re-establishes communication with the vehicle and restarts charging and discharging to the on-board battery based on the charge / discharge restart event, and then executes a third step.
9. A charge / discharge system for charging and discharging an on-board battery installed in a vehicle, A communication unit that communicates with the aforementioned vehicle, A power conversion unit that performs charging and discharging operations on the vehicle battery, The power conversion unit comprises a control unit that controls the charging and discharging operation of the power conversion unit, The control unit, A first step involves establishing communication with the vehicle and charging / discharging the on-board battery based on the user's charge / discharge settings, A second step is to terminate communication with the vehicle and stop charging and discharging the vehicle battery after normal charging or discharging of the vehicle battery in the first step, when a normal stop signal is received from the vehicle, A charge / discharge system that, after the second step, if a predetermined charge / discharge restart event occurs, automatically re-establishes communication with the vehicle and performs a third step of restarting charging and discharging to the on-board battery based on the charge / discharge restart event.