Control method, control device, energy storage power supply and readable storage medium

Abstract

The invention discloses a control method, a control device, an energy storage power supply and a readable storage medium. According to the control method provided by the invention, the energy storage power supply comprises at least two battery packs and a system bus, the at least two battery packs comprise a target battery pack, the at least two battery packs are connected in parallel through the system bus, and each battery pack comprises a battery module, a control panel, a discharging switch and a charging switch. The battery module is connected with the system bus through the discharging switch, the control panel is connected with the system bus through the charging switch, and the control method comprises the following steps: controlling the discharging switch of the target battery pack to be switched off and the charging switch to be switched on under the condition that the target battery pack is powered on and standby and the battery module of the target battery pack is insufficient in power; and sending a charging request to the battery pack with sufficient electric quantity, wherein the charging request is used for requesting the battery pack to supply power to the control panel of the target battery pack through the system bus and the charging switch of the target battery pack. The control method provided by the invention is beneficial to guaranteeing the service life of the target battery pack.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage power supplies, and more specifically, to a control method, a control device, an energy storage power supply, and a readable storage medium. Background Art

[0002] In the related art, some energy storage power supplies include multiple battery packs, and a control board for controlling the battery packs, such as a BMS module, is usually provided in the battery packs. When the power of one of the battery packs is zero, if the energy storage power supply is in standby mode at this time, the control board in the battery pack with zero power will continue to consume the power of the battery pack, causing the battery pack to over-discharge, thereby damaging the battery pack and shortening the service life of the battery pack. Summary of the invention

[0003] Embodiments of the present application provide a control method, a control device, an energy storage power supply, and a readable storage medium.

[0004] The control method of the embodiment of the present application is used to control the target battery pack of the energy storage power supply, the energy storage power supply includes at least two battery packs and a system bus, the at least two battery packs include the target battery pack, the at least two battery packs are connected in parallel through the system bus, each of the battery packs includes a battery module, a control board, a discharge switch and a power replenishment switch, the battery module is connected to the system bus through the discharge switch, and the control board is connected to the system bus through the power replenishment switch, and the control method includes:

[0005] When the target battery pack is powered on and in standby mode and the battery module of the target battery pack is low on power, controlling the discharge switch of the target battery pack to be disconnected and the charging switch to be closed;

[0006] A power replenishment request is sent to the battery pack with sufficient power, wherein the power replenishment request is used to request the battery pack to supply power to the control board of the target battery pack through the system bus and the power replenishment switch of the target battery pack.

[0007] The control method provided in the present application adds a recharge switch between the control board and the system bus. When the target battery pack is powered on and on standby, the recharge switch is closed to use the battery pack with sufficient power to power the control board of the target battery pack, thereby avoiding over-discharge of the target battery pack due to consumption by the control board, thereby avoiding damage to the target battery pack and helping to ensure the service life of the target battery pack.

[0008] In some embodiments, the control method includes:

[0009] When the energy storage power source is in standby or discharging mode, obtaining the voltage of the battery module of the target battery pack;

[0010] When the voltage is less than a preset voltage, it is determined that the target battery pack is powered on and in standby mode and the battery module of the target battery pack is low on power.

[0011] In this way, the voltage of the battery module can intuitively reflect the current power state of the battery module, and the voltage of the battery module can be used to more intuitively and accurately determine whether the target battery pack is in a low-power state.

[0012] In some embodiments, the battery pack includes a pre-charge switch, the supplementary power switch is connected to the system bus through the pre-charge switch, the target battery pack also includes an inverter and a mainboard, the inverter and the mainboard are connected to the battery module through the pre-charge switch and the supplementary power switch, and the control method includes:

[0013] When the energy storage power source is powered on, controlling the pre-charging switch of the target battery pack to close so as to pre-charge the inverter and the mainboard;

[0014] A pre-charge request is sent to the battery pack with sufficient power, wherein the pre-charge request is used to enable the control board of the battery pack to control the pre-charge switch of the battery pack to close, so as to pre-charge the inverter and the main board through the system bus.

[0015] In this way, pre-charging can reduce the large current impact on the energy storage power supply when it is officially powered on, thereby protecting the energy storage power supply and helping to extend the service life of the energy storage power supply.

[0016] In some embodiments, the battery pack further includes a charging switch, the discharging switch is connected to the battery module through the charging switch, and the pre-charging of the inverter and the mainboard includes:

[0017] When the pre-charging is successful and the battery module is low on power, the charging switch, the pre-charging switch and the charging switch of the target battery pack are controlled to be disconnected and the discharging switch is closed;

[0018] A switch request is sent to the battery pack with sufficient power, wherein the switch request is used to enable the control board of the battery pack to control the charging switch and the pre-charging switch of the battery pack to be disconnected and the discharging switch and the charging switch to be closed.

[0019] In this way, the charging switch of the target battery pack is disconnected to avoid circulating current, thereby avoiding triggering charging overcurrent protection; the discharge switch of the target battery pack is closed to prevent the control board from losing power when other battery packs are disconnected.

[0020] In some embodiments, the battery packs each include a power resistor, the power replenishment switch is connected to the system bus through the power resistor, and the battery pack supplies power to the control board of the target battery pack through the system bus and the power replenishment switch of the target battery pack, including:

[0021] The resistance value of the power resistor is adjusted so that the current of the battery pack with sufficient power is greater than a preset current.

[0022] In this way, since the target battery pack is low on power and the current is too small, the current of the battery pack with sufficient power is greater than the preset current, and the control board can be switched to the battery pack with sufficient power for power supply, thereby avoiding over-discharge of the target battery pack.

[0023] In some embodiments, the preset current is the operating current of the control board.

[0024] In this way, the preset current is the working current of the control board, which can ensure the working state of the control board.

[0025] In some embodiments, the discharge switch and the power replenishment switch are both MOS tubes.

[0026] In this way, the static power consumption of the MOS tube is disclosed, which is beneficial to reduce the standby consumption of the energy storage power supply and further avoid over-discharge of the target battery pack.

[0027] In some embodiments, the control method further comprises:

[0028] A power replenishment request is sent to the battery pack with sufficient power, wherein the power replenishment request is used to request the battery pack to supply power to the battery module of the target battery pack through the system bus and the power replenishment switch of the target battery pack.

[0029] In this way, a battery pack with sufficient power can supply power to the control board of the target battery pack while also replenishing power for the battery modules of the target battery pack. When the battery pack with sufficient power is removed, the target battery pack can have a certain amount of power for the control board to use, thereby avoiding over-discharge of the target battery pack.

[0030] A control device in a second embodiment of the present application is used to control a target battery pack of an energy storage power supply, wherein the energy storage power supply includes at least two battery packs and a system bus, wherein the at least two battery packs include the target battery pack, wherein the at least two battery packs are connected in parallel via the system bus, wherein each of the battery packs includes a battery module, a control board, a discharge switch, and a power replenishment switch, wherein the battery module is connected to the system bus via the discharge switch, and the control board is connected to the system bus via the power replenishment switch, wherein the control device includes:

[0031] A control module, configured to control the discharge switch of the target battery pack to be disconnected and the charging switch to be closed when the target battery pack is powered on and in standby mode and the battery module of the target battery pack is low on power;

[0032] The communication module is used to send a power replenishment request to the battery pack with sufficient power, wherein the power replenishment request is used to request the battery pack to supply power to the control board of the target battery pack through the system bus and the power replenishment switch of the target battery pack.

[0033] The energy storage power supply of the third embodiment of the present application includes a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, the processor implements the instructions of the control method as described in any one of the above items.

[0034] The non-volatile computer-readable storage medium of the fourth embodiment of the present application is characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the control method as described in any one of the above items is implemented.

[0035] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 It is a flow chart of a method for controlling an energy storage power supply according to an embodiment of the present application;

[0038] Figure 2 It is a module schematic diagram of a control device of an energy storage power supply according to an embodiment of the present application;

[0039] Figure 3 It is a module schematic diagram of an energy storage power supply according to an embodiment of the present application;

[0040] Figure 4 is a circuit diagram of an energy storage power supply according to an embodiment of the present application;

[0041] Figure 5 It is a flowchart of a method for controlling an energy storage power supply in certain embodiments of the present application;

[0042] Figure 6 It is a flowchart of a method for controlling an energy storage power supply in certain embodiments of the present application;

[0043] Figure 7It is a flowchart of a method for controlling an energy storage power supply in certain embodiments of the present application;

[0044] Figure 8 It is a flowchart of a method for controlling an energy storage power supply in certain embodiments of the present application.

[0045] Explanation of the main component symbols: energy storage power supply 100, control device 10, control module 11, communication module 12, processor 20, memory 30, battery pack 40, battery module 41, control board 42, discharge switch 43, charging switch 44, pre-charge switch 45, inverter 46, main board 47, charging switch 48, power resistor 49, system bus 50. DETAILED DESCRIPTION

[0046] The following further describes the embodiments of the present application in conjunction with the accompanying drawings. The same or similar reference numerals in the accompanying drawings represent the same or similar elements or elements with the same or similar functions.

[0047] In addition, the embodiments of the present application described below in conjunction with the drawings are exemplary and are only used to explain the embodiments of the present application and should not be construed as limiting the present application.

[0048] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the related art, some energy storage power supplies include multiple battery packs, and a control board for controlling the battery packs, such as a BMS module, is usually provided in the battery packs. When the power of one of the battery packs is zero, if the energy storage power supply is in standby mode at this time, the control board in the battery pack with zero power will continue to consume the power of the battery pack, causing the battery pack to over-discharge, thereby damaging the battery pack and shortening the service life of the battery pack.

[0050] See also Figure 1 and Figure 4The control method of the embodiment of the present application is used to control the target battery pack of the energy storage power supply 100. The energy storage power supply 100 includes at least two battery packs 40 and a system bus 50. The at least two battery packs 40 include the target battery pack. The at least two battery packs 40 are connected in parallel through the system bus 50. Each battery pack 40 includes a battery module 41, a control board 42, a discharge switch 43 and a supplementary power switch 44. The battery module 41 is connected to the system bus 50 through the discharge switch 43, and the control board 42 is connected to the system bus 50 through the supplementary power switch 44. The control method includes:

[0051] Step 01: When the target battery pack is powered on and in standby mode and the battery modules of the target battery pack are low on power, the discharge switch of the target battery pack is controlled to be disconnected and the charging switch to be controlled to be closed;

[0052] Step 02: Send a recharge request to a battery pack with sufficient power. The recharge request is used to request the battery pack to supply power to the control board of the target battery pack through the system bus and the recharge switch of the target battery pack.

[0053] See also Figure 2 and Figure 4 The control device 10 of the second embodiment of the present application is used to control the target battery pack of the energy storage power supply 100. The energy storage power supply 100 includes at least two battery packs 40 and a system bus 50. The at least two battery packs 40 include the target battery pack. The at least two battery packs 40 are connected in parallel through the system bus 50. Each battery pack 40 includes a battery module 41, a control board 42, a discharge switch 43 and a recharge switch 44. The battery module 41 is connected to the system bus 50 through the discharge switch 43, and the control board 42 is connected to the system bus 50 through the recharge switch 44. The control device 10 includes a control module 11 and a communication module 12. The control module 11 is used to control the discharge switch 43 of the target battery pack to be disconnected and the recharge switch 44 to be closed when the target battery pack is powered on and the battery module 41 of the target battery pack is low on power; the communication module 12 is used to send a recharge request to the battery pack 40 with sufficient power, and the recharge request is used to request the battery pack 40 to supply power to the control board 42 of the target battery pack through the system bus 50 and the recharge switch 44 of the target battery pack.

[0054] See also Figure 3 and Figure 4The energy storage power supply 100 of the third embodiment of the present application includes a processor 20 and a memory 30. The memory 30 stores a computer program. When the computer program is executed by the processor 20, the processor 20 implements the instructions of any of the above control methods. In other words, the processor 20 can be used to control the discharge switch 43 of the target battery pack to be disconnected and the recharge switch 44 to be closed when the target battery pack is powered on and the battery module 41 of the target battery pack is low on power; send a recharge request to the battery pack 40 with sufficient power, and the recharge request is used to request the battery pack 40 to supply power to the control board 42 of the target battery pack through the system bus 50 and the recharge switch 44 of the target battery pack.

[0055] The control method provided in the present application adds a power replenishment switch 44 between the control board 42 and the system bus 50. When the target battery pack is powered on and in standby mode, the power replenishment switch 44 is closed to utilize the battery pack 40 with sufficient power to power the control board 42 of the target battery pack, thereby avoiding over-discharge of the target battery pack due to consumption by the control board 42, thereby avoiding damage to the target battery pack and facilitating ensuring the service life of the target battery pack.

[0056] Specifically, in the embodiment of the present application, the number of battery packs 40 is three, and the three battery packs 40 are arranged in parallel.

[0057] The system bus 50 aggregates the three battery packs 40 and connects them to the outside world to supply power to the outside world or to charge them from the outside world.

[0058] In an embodiment of the present application, the control board 42 includes a switch control board and a BMS control board, wherein the switch control board is used to control the opening and closing of switches such as the discharge switch 43 and the replenishment switch 44, and the BMS control board is used to monitor and control the status of the battery module 41.

[0059] In the embodiment of the present application, the switch control board of the target battery pack controls the discharge switch 43 to be disconnected, thereby preventing the target battery pack from continuing to discharge, and at the same time controls the power replenishment switch 44 to be closed. At this time, the target battery pack has a low voltage due to zero charge, and other battery packs 40 with sufficient charge form a pressure difference with the target battery pack. The charge of the battery pack 40 with sufficient charge will flow into the target battery pack along the system bus 50 and be supplied to the control board 42 for use.

[0060] See also Figure 5 In some embodiments, the control method includes:

[0061] 011: When the energy storage power source is in standby or discharging, obtain the voltage of the battery module of the target battery pack;

[0062] 012: When the voltage is less than the preset voltage, it is determined that the target battery pack is powered on and in standby mode and the battery modules of the target battery pack are low on power.

[0063] In this way, the voltage of the battery module 41 can intuitively reflect the current power state of the battery module 41 , and the voltage of the battery module 41 can be used to more intuitively and accurately determine whether the target battery pack is in a low-power state.

[0064] In some embodiments, sub-steps 011 and 012 can be implemented by the control module 11, or the control module 11 can be used to obtain the voltage of the battery module 41 of the target battery pack when the energy storage power supply 100 is in standby or discharging; when the voltage is less than the preset voltage, it is determined that the target battery pack is powered on and on standby and the battery module 41 of the target battery pack is low on power.

[0065] In some embodiments, the processor 20 can be used to obtain the voltage of the battery module 41 of the target battery pack when the energy storage power supply 100 is in standby or discharging; when the voltage is less than a preset voltage, it is determined that the target battery pack is powered on and on standby and the battery module 41 of the target battery pack is low on power.

[0066] Specifically, in the embodiment of the present application, the preset voltage is the voltage when the power of the target battery pack is theoretically zero. When the current voltage of the target battery pack is less than or equal to the preset voltage, it can be determined that the target battery pack is in a low-power state.

[0067] See also Figure 6 In some embodiments, the battery pack 40 includes a pre-charge switch 45, and the supplementary power switch 44 is connected to the system bus 50 through the pre-charge switch 45. The target battery pack also includes an inverter 46 and a mainboard 47. The inverter 46 and the mainboard 47 are connected to the battery module 41 through the pre-charge switch 45 and the supplementary power switch 44. The control method includes:

[0068] 013: When the energy storage power source is powered on, the pre-charge switch of the target battery pack is controlled to close to pre-charge the inverter and the mainboard;

[0069] 014: Send a pre-charge request to the battery pack with sufficient power. The pre-charge request is used to enable the control board of the battery pack to control the pre-charge switch of the battery pack to close, so as to pre-charge the inverter and the main board through the system bus.

[0070] In this way, pre-charging can reduce the large current impact on the energy storage power supply 100 when it is officially powered on, thereby protecting the energy storage power supply 100 and helping to extend the service life of the energy storage power supply 100.

[0071] In some embodiments, sub-steps 013 and 014 can be implemented by the control module 11, or the control module 11 can be used to control the pre-charge switch 45 of the target battery pack to close when the energy storage power source 100 is powered on, so as to pre-charge the inverter 46 and the main board 47; send a pre-charge request to the battery pack 40 with sufficient power, and the pre-charge request is used to enable the control board 42 of the battery pack 40 to control the pre-charge switch 45 of the battery pack 40 to close, so as to pre-charge the inverter 46 and the main board 47 through the system bus 50.

[0072] In certain embodiments, the processor 20 can be used to control the pre-charge switch 45 of the target battery pack to close when the energy storage power source 100 is powered on, so as to pre-charge the inverter 46 and the main board 47; and send a pre-charge request to the battery pack 40 with sufficient power, and the pre-charge request is used to enable the control board 42 of the battery pack 40 to control the pre-charge switch 45 of the battery pack 40 to close, so as to pre-charge the inverter 46 and the main board 47 through the system bus 50.

[0073] For details, please refer to Figure 4 In the embodiment of the present application, the pre-charge switch 45 is connected in series with the supplementary power switch 44, and the pre-charge switch 45 and the supplementary power switch 44 are arranged in opposite directions.

[0074] When the energy storage power supply 100 is powered on, it is necessary to pre-charge the inverter 46 and the main board 47 of the target battery pack. Furthermore, both the inverter 46 and the main board 47 have input capacitors. Pre-charging is to pre-charge the input capacitors to avoid breakdown of the input capacitors due to sudden large current.

[0075] In an embodiment of the present application, the control board 42 of the target battery pack controls the closing of the pre-charging switch 45 of the target battery pack and controls the closing of the pre-charging switches 45 of other battery packs 40 through the control boards 42 of other battery packs 40, so that the battery modules 41 of multiple battery packs 40 are all electrically connected to the inverter 46 and the main board 47, thereby realizing pre-charging of the inverter 46 and the main board 47.

[0076] See also Figure 7 In some embodiments, the battery pack 40 further includes a charging switch 48, and the discharge switch 43 is connected to the battery module 41 via the charging switch 48. Sub-step 013 includes:

[0077] 0131: When the pre-charging is successful and the battery module is low on power, the charging switch, pre-charging switch and charging switch of the target battery pack are controlled to be disconnected, and the discharge switch is closed;

[0078] 0132: Send a switch request to a battery pack with sufficient power. The switch request is used to enable the control board of the battery pack to control the battery pack's charging switch and pre-charging switch to be disconnected, and the discharge switch and charging switch to be closed.

[0079] In this way, the charging switch 48 of the target battery pack is disconnected to avoid circulating current, thereby avoiding triggering charging overcurrent protection; the discharging switch 43 of the target battery pack is closed to prevent the control board 42 from losing power when other battery packs 40 are disconnected.

[0080] In some embodiments, sub-steps 0131 and 0132 can be implemented by the control module 11, or the control module 11 can be used to control the target battery pack's power replenishment switch 44, pre-charge switch 45 and charging switch 48 to be disconnected and the discharge switch 43 to be closed when the pre-charging is successful and the battery module 41 is low on power; and send a switch request to the battery pack 40 with sufficient power, and the switch request is used to enable the control board 42 of the battery pack 40 to control the power replenishment switch 44 and pre-charge switch 45 of the battery pack 40 to be disconnected and the discharge switch 43 and charging switch 48 to be closed.

[0081] In some embodiments, the processor 20 can be used to control the target battery pack's power replenishment switch 44, pre-charge switch 45, and charging switch 48 to be disconnected, and the discharge switch 43 to be closed when pre-charging is successful and the battery module 41 is low on power; and send a switch request to the battery pack 40 with sufficient power, and the switch request is used to enable the control board 42 of the battery pack 40 to control the power replenishment switch 44 and pre-charge switch 45 of the battery pack 40 to be disconnected, and the discharge switch 43 and charging switch 48 to be closed.

[0082] For details, please refer to Figure 4 In the embodiment of the present application, the charging switch 48 is connected in series with the discharging switch 43 , and the charging switch 48 and the discharging switch 43 are arranged in opposite directions.

[0083] When charging the target battery pack, since the other battery packs 40 have sufficient power, the voltage of the battery pack 40 with sufficient power will be greater than the voltage of the target battery pack. At this time, if the charging switch 48 of the target battery pack is closed, a circulating current will flow into the target battery pack, which may trigger the charging protection. Therefore, the charging switch 48 of the target battery pack is in the disconnected state. In addition, when a battery pack 40 is disconnected from the energy storage power supply 100, in order to prevent the control board 42 from losing power, the discharge switches 43 of all battery packs 40 are closed to supply power to the control board 42.

[0084] In some embodiments, the battery packs 40 each include a power resistor 49, and the power replenishment switch 44 is connected to the system bus 50 via the power resistor 49. Step 02 includes:

[0085] 021: Adjust the resistance value of the power resistor so that the current of the battery pack with sufficient power is greater than the preset current.

[0086] In this way, since the target battery pack is low on power and the current is too small, the current of the battery pack 40 with sufficient power is greater than the preset current, and the control board 42 can be switched to the battery pack 40 with sufficient power for power supply, thereby avoiding over-discharge of the target battery pack.

[0087] In some embodiments, sub-step 021 can be implemented by the communication module 12, or the communication module 12 can be used to adjust the resistance value of the power resistor 49 so that the current of the battery pack 40 with sufficient power is greater than the preset current.

[0088] In some embodiments, the processor 20 may be configured to adjust the resistance value of the power resistor 49 so that the current of the battery pack 40 with sufficient power is greater than a preset current.

[0089] For details, please refer to Figure 4 In the embodiment of the present application, the power resistor 49 is connected in series between the power replenishment switch 44 and the pre-charge switch 45. By adjusting the power resistor 49 of each battery pack 40, the output current of each battery pack 40 can be adjusted. Since the target battery pack is in a power-deficient state, its output current is usually low. Therefore, by adjusting the power resistor 49 of the battery pack 40 with sufficient power so that the output current is greater than the output current of the target battery pack, the battery pack 40 with sufficient power can be used to power the control board 42.

[0090] In some embodiments, the preset current is the operating current of the control board 42 .

[0091] In this way, the preset current is the working current of the control board 42 and can ensure the working state of the control board 42.

[0092] Specifically, in the embodiment of the present application, since the target battery pack is in a low-power state, its output current is usually lower than the operating current of the control board 42, making it unable to work normally. Therefore, it is necessary to adjust the power resistor 49 of the battery pack 40 with sufficient power so that its output current is greater than the operating current of the control board 42, so that the control board 42 can work normally.

[0093] In some embodiments, the discharge switch 43 and the supplementary power switch 44 are both MOS tubes.

[0094] In this way, the static power consumption of the MOS tube is disclosed, which is beneficial to reducing the standby consumption of the energy storage power supply 100 and further avoiding over-discharge of the target battery pack.

[0095] Specifically, MOS tube, the full name of which is Metal-Oxide-Semiconductor Field Effect Transistor, is a semiconductor device that works based on the field effect principle. It consists of a metal source, a drain, a gate and an oxide layer. By adjusting the gate voltage to control the drain current, it realizes functions such as signal amplification and switching. Compared with ordinary switches, MOS tubes have low power consumption, high speed, small size, high stability and strong controllability.

[0096] See also Figure 8 In some embodiments, the control method further comprises:

[0097] Step 03: Send a recharge request to a battery pack with sufficient power. The recharge request is used to request the battery pack to supply power to the battery module of the target battery pack through the system bus and the recharge switch of the target battery pack.

[0098] In this way, the battery pack 40 with sufficient power can supply power to the control board 42 of the target battery pack while also replenishing power for the battery module 41 of the target battery pack. When the battery pack 40 with sufficient power is removed, the target battery pack can have a certain amount of power for the control board 42 to use, thereby avoiding over-discharge of the target battery pack.

[0099] In some embodiments, step 03 can be implemented by the communication module 12, or the communication module 12 can be used to send a recharge request to the battery pack 40 with sufficient power, and the recharge request is used to request the battery pack 40 to supply power to the battery module 41 of the target battery pack through the system bus 50 and the recharge switch 44 of the target battery pack.

[0100] In some embodiments, the processor 20 may be configured to send a recharge request to a battery pack 40 with sufficient power, wherein the recharge request is configured to request the battery pack 40 to supply power to the battery module 41 of the target battery pack via the system bus 50 and the recharge switch 44 of the target battery pack.

[0101] Specifically, in the embodiment of the present application, the battery pack 40 with sufficient power can also charge the target battery pack at the same time as supplying power to the control board 42. That is, the battery module 41 of the battery pack 40 with sufficient power is electrically connected to the battery module 41 of the target battery pack through the system bus 50 and the power supplement switch 44, so that the power of the battery pack 40 with sufficient power flows into the battery module 41 of the target battery pack along the system bus 50 to charge the target battery pack.

[0102] The non-volatile computer-readable storage medium of the fourth embodiment of the present application is characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by the processor 20, any of the above control methods is implemented.

[0103] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0104] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0105] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0106] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A control method for controlling a target battery pack of an energy storage power supply, wherein the energy storage power supply comprises at least two battery packs and a system bus, wherein the at least two battery packs comprise the target battery pack, wherein the at least two battery packs are connected in parallel via the system bus, wherein each of the battery packs comprises a battery module, a control board, a discharge switch and a supplementary power switch, wherein the battery module is connected to the system bus via the discharge switch, and the control board is connected to the system bus via the supplementary power switch, wherein: The control method comprises: When the target battery pack is powered on and in standby mode and the battery module of the target battery pack is low on power, controlling the discharge switch of the target battery pack to be disconnected and the charging switch to be closed; A power replenishment request is sent to the battery pack with sufficient power, wherein the power replenishment request is used to request the battery pack to supply power to the control board of the target battery pack through the system bus and the power replenishment switch of the target battery pack.

2. The control method according to claim 1, characterized in that: The control method comprises: When the energy storage power source is in standby or discharging mode, obtaining the voltage of the battery module of the target battery pack; When the voltage is less than a preset voltage, it is determined that the target battery pack is powered on and in standby mode and the battery module of the target battery pack is low on power.

3. The control method according to claim 1, characterized in that: The battery pack includes a pre-charge switch, and the supplementary power switch is connected to the system bus through the pre-charge switch. The target battery pack also includes an inverter and a mainboard, and the inverter and the mainboard are connected to the battery module through the pre-charge switch and the supplementary power switch. The control method includes: When the energy storage power source is powered on, controlling the pre-charging switch of the target battery pack to close so as to pre-charge the inverter and the mainboard; A pre-charge request is sent to the battery pack with sufficient power, wherein the pre-charge request is used to enable the control board of the battery pack to control the pre-charge switch of the battery pack to close, so as to pre-charge the inverter and the main board through the system bus.

4. The control method according to claim 3, characterized in that: The battery pack further includes a charging switch, the discharging switch is connected to the battery module via the charging switch, and the pre-charging of the inverter and the mainboard includes: When the pre-charging is successful and the battery module is low on power, the charging switch, the pre-charging switch and the charging switch of the target battery pack are controlled to be disconnected and the discharging switch is closed; A switch request is sent to the battery pack with sufficient power, wherein the switch request is used to enable the control board of the battery pack to control the charging switch and the pre-charging switch of the battery pack to be disconnected and the discharging switch and the charging switch to be closed.

5. The control method according to claim 1, characterized in that: The battery packs each include a power resistor, the power replenishment switch is connected to the system bus through the power resistor, and the battery pack supplies power to the control board of the target battery pack through the system bus and the power replenishment switch of the target battery pack, including: The resistance value of the power resistor is adjusted so that the current of the battery pack with sufficient power is greater than a preset current.

6. The control method according to claim 5, characterized in that: The preset current is the working current of the control board.

7. The control method according to claim 1, characterized in that: The discharge switch and the power replenishment switch are both MOS tubes.

8. The control method according to claim 1, characterized in that: The control method further comprises: A power replenishment request is sent to the battery pack with sufficient power, wherein the power replenishment request is used to request the battery pack to supply power to the battery module of the target battery pack through the system bus and the power replenishment switch of the target battery pack.

9. A control device for controlling a target battery pack of an energy storage power supply, the energy storage power supply comprising at least two battery packs and a system bus, the at least two battery packs comprising the target battery pack, the at least two battery packs being connected in parallel via the system bus, each of the battery packs comprising a battery module, a control board, a discharge switch and a power replenishment switch, the battery module being connected to the system bus via the discharge switch, the control board being connected to the system bus via the power replenishment switch, characterized in that: The control device comprises: A control module, configured to control the discharge switch of the target battery pack to be disconnected and the charging switch to be closed when the target battery pack is powered on and in standby mode and the battery module of the target battery pack is low on power; The communication module is used to send a power replenishment request to the battery pack with sufficient power, wherein the power replenishment request is used to request the battery pack to supply power to the control board of the target battery pack through the system bus and the power replenishment switch of the target battery pack.

10. An energy storage power supply, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor implements the instructions of the control method according to any one of claims 1 to 8.

11. A non-volatile computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the control method according to any one of claims 1 to 8 is implemented.

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