Battery cluster convergence method, device and system, storage medium and program product

Abstract

The embodiment of the invention provides a battery cluster convergence method, device and system, a storage medium and a program product. The method comprises the steps that after a convergence instruction is received, the working state of a plurality of circuit breakers connected with a converter corresponding to the convergence instruction is controlled to be closed, so that battery clusters corresponding to the circuit breakers are connected in parallel, and convergence of a plurality of energy storage assemblies is achieved; detecting the working state of each circuit breaker; and when the working state of at least one circuit breaker is detected to be disconnected, disconnecting each circuit breaker. Cross-container confluence is realized, energy storage confluence is performed by controlling the circuit breakers in the containers, the confluence efficiency is high, the electric energy output by a plurality of converters does not need to be confluence again, and the reliability of confluence control is improved through linkage control of a plurality of circuit breakers.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage system control, and particularly relates to a battery cluster busbar connection method, device, system, storage medium, and program product. Background Art

[0002] An energy storage container is a device for storing electrical energy and is usually designed in a form similar to a shipping container for easy transportation and use. The energy storage container can provide more efficient and sustainable energy utilization, such as providing power balance or serving as a backup power source.

[0003] Multiple battery clusters are configured in the energy storage container, and the energy storage capacity of the energy storage container is increased by connecting the battery clusters in parallel. Currently, an energy storage container is usually configured with one or more inverters. The electrical energy of the battery clusters in the energy storage container is busbar-connected to the inverter for use by external electrical equipment. However, the number of battery clusters in the energy storage container limits the energy storage capacity. When a larger energy storage capacity is required, the electrical energy output by multiple inverters often needs to be busbar-connected again, which is cumbersome and inefficient. Summary of the Invention

[0004] The battery cluster busbar connection method, device, system, storage medium, and program product provided by the embodiments of the present application busbar-connect multiple battery clusters in different energy storage containers, avoiding the need to busbar-connect the electrical energy output by multiple inverters again, so as to simplify the busbar connection operation and improve the working efficiency of the energy storage system.

[0005] In a first aspect, an embodiment of the present application provides a battery cluster busbar connection method, which is applied to a control unit of a battery cluster busbar connection system. The battery cluster busbar connection system further includes multiple energy storage components and multiple circuit breakers. Each energy storage component includes at least one battery cluster group, and the circuit breaker corresponding to each energy storage component and the battery cluster group it includes is placed in a container. The battery cluster group includes at least one battery cluster; the multiple circuit breakers are used to control the parallel connection of the corresponding battery cluster groups, and the multiple circuit breakers are located in multiple containers; the method includes:

[0006] After receiving a busbar connection instruction, based on the busbar connection instruction, control the working states of the multiple circuit breakers to be closed to parallel-connect the battery cluster groups corresponding to the multiple circuit breakers, thereby achieving busbar connection among the multiple energy storage components;

[0007] Detect the working states of the circuit breakers;

[0008] When the working state of at least one detected circuit breaker is open, open each circuit breaker.

[0009] In a possible implementation, the positive electrode and the negative electrode of the battery cluster are respectively connected to the positive bus and the negative bus through a first contactor and a second contactor. The same battery cluster group corresponds to the same set of positive bus and negative bus, and the circuit breaker corresponding to the battery cluster group is connected to the same set of positive bus and negative bus corresponding to the battery cluster group;

[0010] After receiving the busbar connection instruction, based on the busbar connection instruction, control the operating states of multiple circuit breakers to be closed, including:

[0011] After receiving the busbar connection instruction, for the battery cluster groups corresponding to the multiple circuit breakers indicated by the busbar connection instruction, close the first contactor and the second contactor of each battery cluster in the battery cluster group;

[0012] After the first contactor and the second contactor of each battery cluster in the battery cluster group are both closed, close the circuit breaker corresponding to the battery cluster group to realize the parallel connection of the battery cluster groups corresponding to the multiple circuit breakers.

[0013] In a possible implementation, closing the first contactor and the second contactor of each battery cluster in the battery cluster group includes:

[0014] First, close the first contactor and the second contactor of the first battery cluster in the battery cluster group, and then close the first contactor and the second contactor of the second battery cluster in the battery cluster group;

[0015] After closing the first contactor and the second contactor of the second battery cluster, if the difference between the voltage of the battery cluster group and the voltages of the remaining battery clusters in the battery cluster group is less than a preset value, close the first contactor and the second contactor of the remaining battery clusters in the battery cluster group;

[0016] Wherein, the first battery cluster is the battery cluster with the minimum voltage in the battery cluster group, and the second battery cluster is any battery cluster in the battery cluster group except the first battery cluster.

[0017] In a possible implementation, closing the first contactor and the second contactor of each battery cluster in the battery cluster group includes:

[0018] First, close the first contactor and the second contactor of the third battery cluster in the battery cluster group, and then close the first contactor and the second contactor of the fourth battery cluster in the battery cluster group;

[0019] After closing the first contactor and the second contactor of the fourth battery cluster, if the difference between the voltage of the battery cluster group and the voltages of the remaining enabled battery clusters in the battery cluster group is less than a preset value, close the first contactor and the second contactor of the remaining enabled battery clusters in the battery cluster group;

[0020] After the first contactor and the second contactor of each battery cluster in the battery cluster group are both closed, closing the circuit breaker corresponding to the battery cluster group includes:

[0021] After the first contactor and the second contactor of each battery cluster in the enabled state within the battery cluster group are both closed, close the circuit breaker corresponding to the battery cluster group;

[0022] Among them, the third battery cluster is the battery cluster with the minimum voltage among the enabled battery clusters in the battery cluster group, and the fourth battery cluster is any enabled battery cluster in the battery cluster group except the third battery cluster.

[0023] In a possible implementation manner, the method further includes:

[0024] After receiving the shutdown instruction, disconnect each circuit breaker;

[0025] For each battery cluster group corresponding to the circuit breaker, after disconnecting the circuit breaker corresponding to the battery cluster group, disconnect the first contactor and the second contactor of each battery cluster in the battery cluster group.

[0026] In a possible implementation manner, the method further includes:

[0027] After detecting that the operating states of multiple circuit breakers are closed, set the interlock flag to 1;

[0028] After detecting that the operating state of any one circuit breaker is open, set the interlock flag to 0, so as to disconnect each circuit breaker when the interlock flag is 0.

[0029] In a second aspect, an embodiment of the present application provides a battery cluster busbar device, which is applied to a control unit of a battery cluster busbar system. The battery cluster busbar system further includes a plurality of energy storage components and a plurality of circuit breakers. The energy storage components include at least one battery cluster group. The circuit breaker corresponding to each energy storage component and the battery cluster group it includes is placed in a container. The battery cluster group includes at least one battery cluster; the plurality of circuit breakers are used to control the parallel connection of the corresponding battery cluster groups. The plurality of circuit breakers are located in a plurality of containers. The device includes:

[0030] A busbar instruction execution module, configured to, after receiving a busbar instruction, based on the busbar instruction, control the operating states of a plurality of circuit breakers to be closed, so as to parallel-connect the battery cluster groups corresponding to the plurality of circuit breakers, and realize busbar connection among a plurality of energy storage components;

[0031] A circuit breaker detection module, configured to detect the operating states of each circuit breaker;

[0032] An interlock control module, configured to disconnect each circuit breaker when the operating state of at least one detected circuit breaker is open.

[0033] In a third aspect, an embodiment of the present application provides a battery cluster busbar system, including: a plurality of energy storage components, a plurality of circuit breakers, and a control unit;

[0034] The energy storage assembly includes at least one battery cluster group, each energy storage assembly and the circuit breaker corresponding to the battery cluster group included therein are placed in a container, and the battery cluster group includes at least one battery cluster;

[0035] Multiple circuit breakers are used to control the parallel connection of corresponding battery clusters, and the multiple circuit breakers are located in multiple containers;

[0036] The control unit is used to execute the method provided in the first aspect above.

[0037] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a processor, they are used to implement the method provided in the first aspect above.

[0038] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which implements the method provided in the first aspect above when executed by a processor.

[0039] The battery cluster convergence method, device, system, storage medium and program product provided in the embodiments of the present application are for multiple containers. When convergence is performed, the battery cluster groups in the multiple energy storage components are connected in parallel by closing the circuit breakers corresponding to the battery cluster groups in the multiple energy storage components, and are connected to the converter to realize the convergence of electric energy to the converter, thereby overcoming the problem of limited energy storage capacity of a single container, avoiding the re-convergence of electric energy output by multiple converters, simplifying the operation and improving the convergence efficiency; and in the process of energy storage component convergence, it is detected in real time whether multiple circuit breakers are closed. When at least one circuit breaker is disconnected, the other circuit breakers are disconnected in conjunction, that is, the convergence of energy storage components is stopped, realizing the interlocking control of the circuit breakers, avoiding the risk of insufficient energy storage capacity of the energy storage components corresponding to the undisconnected circuit breakers after the electric energy convergence, resulting in abnormal power consumption or damage to the power-consuming equipment, and improving the safety and stability of the convergence. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] Figure 1 A schematic structural diagram of a battery cluster bus system according to an embodiment of the present application;

[0042] Figure 2 A schematic diagram of a flow chart of a battery cluster converging method provided in an embodiment of the present application;

[0043] Figure 3 A schematic flow chart of another battery cluster converging method provided in an embodiment of the present application;

[0044] Figure 4 Schematic flow diagram of another battery cluster busbar connection method provided by an embodiment of the present application;

[0045] Figure 5 Schematic structural diagram of a battery cluster busbar connection device provided by an embodiment of the present application;

[0046] Figure 6 Schematic structural diagram of a battery cluster busbar connection system provided by an embodiment of the present application.

[0047] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0048] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0049] An energy storage container is a device for storing electric energy, which can be used for storing electric energy, providing power balance, and serving as a backup power source, etc. For the convenience of transportation and use, it usually adopts the form of a standard container. A plurality of battery clusters are configured in the energy storage container, and by connecting the plurality of battery clusters in parallel, the total amount of electric energy that the energy storage container can store, that is, the energy storage capacity, can be increased.

[0050] When designing and using an energy storage container, different energy storage capacities may be required according to different application scenarios. For example, a larger energy storage capacity is required for power grid regulation, and a smaller energy storage capacity is required for household equipment use. The energy storage container usually connects a certain number of battery clusters in parallel according to the energy storage capacity requirement, converges the currents of the plurality of battery clusters into a total current, and then this current is converted from direct current to alternating current through an inverter for use by electrical equipment.

[0051] Since the number of battery clusters that can be accommodated in an energy storage container is limited, the energy storage capacity of the energy storage container is limited. For application scenarios that require a large energy storage capacity, an energy storage container with a larger physical space can be used. However, when the energy storage container is too large, its movement and transportation are more difficult, and it is not easy to manage when too many battery clusters are placed in the same physical space, presenting a greater potential safety hazard. Currently, usually, the electric energy output from multiple energy storage containers is converged again, but the operation is cumbersome and the efficiency is low.

[0052] In view of the above problems, an embodiment of the present application provides a battery cluster busbar connection method, which performs busbar connection on energy storage components in different energy storage containers through multiple circuit breakers, with simple operation and strong compatibility. At the same time, in order to avoid the situation of out-of-sync states that may occur when using battery clusters in different energy storage components, the on-off of multiple circuit breakers is controlled in a coordinated manner, reducing the operation complexity and error risk, and avoiding the risk of abnormal power consumption or damage to electrical equipment caused by partial opening or partial disconnection, improving the safety and stability of the busbar connection.

[0053] The embodiment of the present application can be applied to scenarios where an energy storage system provides electrical energy to electrical equipment, such as power grid load management, backup power supply, and emergency power supply scenarios. Taking power grid load management as an example, during the peak period of power demand, the battery cluster busbar connection system in the energy storage system uses the battery cluster busbar connection method provided by the embodiment of the present application to perform busbar connection on multiple battery clusters in multiple energy storage containers (hereinafter referred to as containers) to meet the energy storage capacity requirements and provide electrical energy to electrical equipment, reducing the pressure on the power grid.

[0054] Figure 1 It is a schematic structural diagram of the battery cluster busbar connection system provided by the embodiment of the present application. As Figure 1 shown, the battery cluster busbar connection system includes multiple energy storage components and multiple circuit breakers. One energy storage component can include one or more battery cluster groups. For example, Figure 1 the energy storage component 1 in includes battery cluster group 1 and battery cluster group 2, while the energy storage component 2 only includes battery cluster group 3. Each battery cluster group is connected to a circuit breaker for controlling the connection or disconnection between the battery cluster group and the converter. The circuit breakers corresponding to each energy storage component and the battery cluster groups it includes are placed in one container. As Figure 1 shown, in container 1, energy storage component 1 is placed, as well as circuit breaker 1 corresponding to battery cluster group 1 and circuit breaker 2 corresponding to battery cluster group 2; in container 2, battery cluster group 3 is placed, as well as circuit breaker 3 corresponding to battery cluster group 3.

[0055] One battery cluster group includes at least one battery cluster, and one battery cluster is obtained by combining battery cells according to a certain layout and connection method. In Figure 1 , battery cluster group 1 includes battery clusters 11 to 1m, battery cluster group 2 includes battery clusters 21 to 2n, and battery cluster group 3 includes battery clusters 31 to 3k, where m, n, and k are positive integers greater than or equal to 1, that is, a battery cluster group can include only one battery cluster or two or more battery clusters.

[0056] The circuit breaker is used to control the connection or disconnection of the corresponding battery cluster group and the converter. When a converter is connected to multiple circuit breakers, the multiple circuit breakers are used to control the parallel connection of the corresponding battery cluster groups, and the parallel-connected battery cluster groups are connected to the converter. The multiple circuit breakers can be located in multiple containers. For example, Figure 1 when the circuit breaker 1 is closed, the converter 1 and the battery cluster group 1 can be connected; for example, Figure 1 in the figure, the converter 2 is connected to the circuit breaker 2 located in the container 1 and the circuit breaker 3 located in the container 2. In this scenario, when the circuit breaker 2 and the circuit breaker 3 are closed, the battery cluster group 2 and the battery cluster group 3 can be connected in parallel, and the parallel-connected battery cluster group is connected to the converter 2.

[0057] The number of battery clusters in the battery cluster group connected to the converter is related to the required energy storage capacity of the converter. For example, according to the required energy storage capacity of the converter 1, m battery clusters need to be connected in parallel; according to the required energy storage capacity of the converter 2, the number of battery clusters to be connected in parallel is n + k. There are n battery clusters connected in parallel in the battery cluster group 2 and k battery clusters connected in parallel in the battery cluster group 3. n and k can be the same or different, and there is no restriction here. For example, if 10 battery clusters need to be connected in parallel according to the required energy storage capacity, these 10 battery clusters can be distributed in 2 battery cluster groups, and the number of battery clusters in the 2 battery cluster groups can be 4 and 6 respectively, or 5 each.

[0058] It can be understood that the battery cluster groups corresponding to the multiple circuit breakers can be multiple symmetric battery cluster groups, that is, the number of battery clusters in the battery cluster group is the same, or multiple asymmetric battery cluster groups, that is, the number of battery clusters in the battery cluster group is different. It only needs to ensure that the required energy storage capacity is reached when the multiple battery cluster groups are connected in parallel. In this way, flexible current collection can be realized from the energy storage components in multiple containers.

[0059] Continue to refer to Figure 1 , the positive and negative electrodes of each battery cluster can be connected to the positive busbar and the negative busbar through the first contactor and the second contactor respectively. The same battery cluster group corresponds to the same set of positive busbar and negative busbar. By closing the first contactor and the second contactor, the positive electrodes of the battery clusters in the same battery cluster group are all connected to the positive busbar, and the negative electrodes are all connected to the negative busbar, so that the battery clusters are connected in parallel. The circuit breaker corresponding to the battery cluster group is connected to the same set of positive busbar and negative busbar corresponding to the battery cluster group, so as to realize the on-off control of the circuit between the battery cluster group and the converter by closing or opening the circuit breaker. When the first contactor, the second contactor of each battery cluster in the battery cluster group and the circuit breaker corresponding to the battery cluster group are all closed, the battery cluster group can provide direct current to the converter.

[0060] The first contactor and the second contactor can be contactors in the normally open state or contactors in the normally closed state.

[0061] The control unit in the battery cluster busbar system controls the battery cluster busbar system according to the battery cluster busbar method provided in this application to achieve the busbar control of multiple energy storage components.

[0062] The following uses specific embodiments to describe in detail the technical solutions of this application and how the technical solutions of this application solve the above technical problems. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0063] Figure 2 It is a schematic flowchart of a battery cluster busbar method provided by an embodiment of this application. The battery cluster busbar method provided in this embodiment is applied to Figure 1 the control unit in the battery cluster busbar system of Figure 2 as shown, and the method includes:

[0064] S201. After receiving the busbar instruction, based on the busbar instruction, control the working states of multiple circuit breakers to be closed to parallel the battery cluster groups corresponding to the multiple circuit breakers, so as to achieve busbar connection among multiple energy storage components.

[0065] The busbar instruction specifically refers to the instruction received by the control unit to perform busbar connection on the battery cluster busbar system. A circuit breaker is a device that can control the on-off of a circuit and is also used to protect the circuit. For example, it can automatically disconnect when the circuit is overloaded or short-circuited. The circuit breaker can be an air circuit breaker, a smart circuit breaker, or other circuit breakers with the above functions. The working state of the circuit breaker specifically refers to closed and open, and these two states determine whether the corresponding battery cluster group and the converter are connected or disconnected.

[0066] The busbar instruction can be issued by relevant personnel through buttons, a host computer, etc., or can be triggered actively. For example, when a set condition is met, the set condition can be a time condition, or it can include actively switching the battery cluster busbar system as a backup power source when detecting abnormal grid power supply. In this case, the set condition can be detecting power interruption, long-term overvoltage or undervoltage provided by the grid, etc.

[0067] In this embodiment, the circuit breaker is mainly used to control the on-off of the circuit and can be remotely controlled. For example, the control unit sends a closing instruction to the circuit breaker to control it to close. If a converter is connected to multiple circuit breakers, the circuit breaker is mainly used to control the parallel connection of multiple battery cluster groups corresponding to the multiple circuit breakers and the connection of the parallel-connected battery cluster groups to the converter, such as Figure 1 the converter 2 in

[0068] In addition to controlling the on-off of the control circuit, compared with a conventional switch, a circuit breaker can also protect the circuit. For example, when leakage is detected or the current exceeds the safety threshold, the circuit is disconnected. It can also control the on-off of the circuit according to a preset rule. For example, when the battery pack in the energy storage component corresponding to the circuit breaker has insufficient power, the circuit breaker is controlled to disconnect.

[0069] When a converter is connected to multiple circuit breakers, after receiving the bus connection instruction, based on the bus connection instruction, the converter that needs to work and the multiple circuit breakers connected to the converter are determined. The control unit sends a closing instruction to the multiple circuit breakers to control the working states of the multiple circuit breakers to be closed, so as to parallel the corresponding multiple battery packs and connect the paralleled battery packs to the converter, that is, to converge the current of the battery packs in the multiple energy storage components to the converter. The converter converts the direct current provided by the battery packs into alternating current and outputs it to the electrical equipment to realize power supply to the electrical equipment.

[0070] In some embodiments, each battery cluster in the battery pack can also be connected with a first contactor and a second contactor to control the connection and disconnection between the battery clusters in the battery pack. And when the current or voltage in the circuit is abnormal, the first contactor and the second contactor can quickly disconnect to prevent the battery clusters from being damaged. When the first contactors and the second contactors of each battery cluster are closed, each battery cluster is paralleled together. When the circuit breaker is also closed, each battery cluster in the battery pack forms a loop with the converter, realizing the convergence of the current of the battery pack to the converter.

[0071] The battery clusters in the battery pack are paralleled. The first contactors and the second contactors of the battery clusters in the battery pack can be in the normally open state or the normally closed state. If the battery clusters in the battery pack are in the normally open state, before controlling the working states of the multiple circuit breakers to be closed, it is necessary to first close the first contactors and the second contactors of each battery cluster. If the battery clusters in the battery pack are in the normally closed state, directly controlling the working states of the multiple circuit breakers to be closed can realize the bus connection of the energy storage components.

[0072] The first contactor and the second contactor in the normally open state mean that in the default state, the first contactor and the second contactor are disconnected, and the battery cluster is not connected to the positive bus and the negative bus, such as Figure 1 the first contactor and the second contactor of each battery cluster in are disconnected. When the battery cluster needs to start working, close the first contactor and the second contactor of the battery cluster to connect the battery cluster to the circuit. Through the first contactor and the second contactor in the normally open state, the paralleled battery clusters can be disconnected when the energy storage component is not in use, preventing current from existing between the battery clusters, reducing the risk of short circuit or overload, and at the same time preventing over-discharge or over-charge of the battery.

[0073] The first contactor and the second contactor in the normally closed state mean that in the default state, the first contactor and the second contactor are closed, and the battery clusters are connected to the positive busbar and the negative busbar. For example, Figure 1 the first contactor and the second contactor of each battery cluster in

[0074] are closed. When the circuit is abnormal or a disconnection instruction is received, the first contactor and the second contactor are disconnected. When the energy storage components need to be used frequently, the normally closed state can be selected so that the battery clusters are always in parallel, which can simplify the operation, reduce the waiting time, and reduce the risk of interrupted power supply caused by contactor failures or operational errors. Using battery clusters in the normally closed state is particularly important for systems that require quick switching. Figure 1 Exemplarily, continuing to refer to

[0075] When the battery clusters in battery cluster group 2 and battery cluster group 3 are in the normally closed state, after receiving the busbar connection instruction, the control unit controls the breakers 2 and 3 to be in the closed state, so that battery cluster group 2 and battery cluster group 3 can be connected in parallel, and the current after the parallel connection of battery cluster group 2 and battery cluster group 3 is busbar-connected to the converter 2.

[0076] After controlling the working states of multiple breakers to be closed, multiple energy storage components can supply power to electrical equipment through the converter.

[0077] During the power supply process, the breaker may automatically trip. For example, when there is an overheating situation in the energy storage components in a certain container, there is an over-discharge in the battery clusters in the corresponding battery cluster group, or the current exceeds the safety threshold. In the above situations, the breaker will actively trip to protect the safety of the battery cluster busbar system and electrical equipment.

[0078] In order to avoid affecting the power supply to electrical equipment after the breaker automatically trips, after controlling the working states of multiple breakers to be closed, it is necessary to continuously detect the working states of the breakers to promptly discover the breakers that trip actively.

[0079] S203. When the working state of at least one detected breaker is open, open all breakers.

[0080] Since the energy storage capacity busbar-connected to the converter in the battery cluster busbar system corresponds to the energy storage capacity required by the converter or electrical equipment, when at least one detected breaker is in the above situation and the working state of the breaker is open, the sum of the energy storage capacities of the battery cluster groups corresponding to the breakers that are not opened does not meet the actual usage requirements. In order to avoid abnormal power consumption or damage to electrical equipment, disconnect the other breakers connected to the converter.

[0081] A chain flag bit can be set between multiple circuit breakers corresponding to the same converter. When the chain flag bit is 1, it indicates that the multiple circuit breakers are in a chained state, that is, their operating states are the same. When at least one of the multiple circuit breakers is opened, the control unit sends an opening instruction to the other circuit breakers to control them to open.

[0082] It is also possible to use mechanically interlocked circuit breakers. When some of them are opened, the other circuit breakers will also be opened accordingly.

[0083] In some embodiments, when the operating state of at least one detected circuit breaker is open, after opening each circuit breaker, an exception prompt can be sent, such as a sound alarm, to send a prompt message to the staff or the management terminal, so that the staff can repair the battery cluster busbar system or replace other battery cluster busbar systems to supply power to the electrical equipment.

[0084] If only some of the battery cluster states are abnormal after maintenance, the first contactor and the second contactor of the battery cluster with abnormal state can be opened, and multiple circuit breakers can be re-closed. The converter selects the power consumption reduction mode and continues to be used. The power consumption reduction mode is a working state of the converter. When in the power consumption reduction mode, the converter extends the service life of the battery cluster by reducing power consumption.

[0085] If other battery cluster busbar systems are replaced to supply power to the electrical equipment, after opening each circuit breaker, the first contactor and the second contactor of each battery cluster in the battery cluster group corresponding to each circuit breaker are opened.

[0086] The battery cluster busbar method provided by the embodiments of the present application is for multiple containers. When performing busbar connection, by closing the circuit breakers corresponding to the battery cluster groups in multiple energy storage components, the battery cluster groups in multiple energy storage components are connected in parallel and connected to the converter, so as to realize the busbar connection of electric energy to the converter, overcome the problem of limited energy storage capacity of a single container, avoid re-busbar connection of the electric energy output by multiple converters, simplify the operation, and improve the busbar connection efficiency; and during the busbar connection process of the energy storage components, it is detected in real time whether multiple circuit breakers are closed. When at least one circuit breaker is open, other circuit breakers are linked to open, that is, the busbar connection of the energy storage components is disconnected, realizing the interlocking control of the circuit breakers, and avoiding the risk of abnormal power consumption or damage to the electrical equipment caused by insufficient energy storage capacity after the electric energy of the energy storage components corresponding to the unopened circuit breakers is busbar-connected, improving the safety and stability of the busbar connection.

[0087] Figure 3 It is a schematic flowchart of another battery cluster busbar method provided by the embodiments of the present application. For the first contactor and the second contactor of each battery cluster being in the normally open state, this embodiment further refines step S201 on the basis of the Figure 2 embodiment shown, and adds the processing method when a shutdown instruction is received. AsFigure 3 As shown, the method may specifically include the following steps:

[0088] S301. After receiving the busbar connection instruction, for the battery cluster groups corresponding to the multiple circuit breakers indicated by the busbar connection instruction, close the first contactor and the second contactor of each battery cluster within the battery cluster group.

[0089] After receiving the busbar connection instruction, obtain the multiple circuit breakers that need to be closed as indicated by the busbar connection instruction. For the battery cluster groups corresponding to the multiple circuit breakers, when closing the circuit breakers corresponding to each battery cluster group, the electric energy flowing into the converter should meet the energy storage capacity requirement. Therefore, before controlling the working state of the circuit breaker to be closed, it is necessary to determine that the battery clusters in each battery cluster group have been connected to the circuit. The first contactor and the second contactor of each battery cluster are in the normally open state, and it is necessary to close the first contactor and the second contactor of each battery cluster within the battery cluster group to make each battery cluster work.

[0090] Exemplarily, continue to refer to Figure 1 , the positive electrode and the negative electrode of each battery cluster are respectively connected to the positive busbar and the negative busbar through the first contactor and the second contactor. When the first contactor and the second contactor of each battery cluster are closed, a voltage difference is formed between the positive busbar and the negative busbar for this battery cluster, and this battery cluster forms a current branch. The same set of positive busbar and negative busbar corresponding to the same battery cluster group, by closing the first contactor and the second contactor of the battery clusters corresponding to the same battery cluster group, the battery clusters are connected in parallel between the positive busbar and the negative busbar. When the working state of the circuit breaker corresponding to the battery clusters connected to the same set of positive busbar and negative busbar corresponding to this battery cluster group is closed, the current branches formed by each battery cluster converge to the branch where the circuit breaker is located, completing the busbar connection of each battery cluster in this battery cluster group.

[0091] Optionally, closing the first contactor and the second contactor of each battery cluster within the battery cluster group includes:

[0092] First, close the first contactor and the second contactor of the first battery cluster within the battery cluster group, and then close the first contactor and the second contactor of the second battery cluster within the battery cluster group; after closing the first contactor and the second contactor of the second battery cluster, if the difference between the voltage of the battery cluster group and the voltage of the remaining battery clusters within the battery cluster group is less than a preset value, then close the first contactor and the second contactor of the remaining battery clusters within the battery cluster group; where the first battery cluster is the battery cluster with the minimum voltage within the battery cluster group, and the second battery cluster is any battery cluster other than the first battery cluster within the battery cluster group.

[0093] Due to the characteristic differences of each battery cluster in the battery cluster group, the losses during the charging and discharging processes, and the matching circuits, etc., there may be situations where the voltages of each battery cluster are different. If battery clusters with different voltages are connected in parallel, it will cause some battery clusters to be over-discharged or under-charged, thus shortening the lifespan of the battery clusters and also reducing the overall performance. Therefore, when making the battery clusters in the battery cluster group converge, the first contactor and the second contactor should be closed in a certain order.

[0094] The first battery cluster is the battery cluster with the smallest voltage in the battery cluster group, or it can also be 2 or more battery clusters with the smallest voltage in the battery cluster group. Specifically, the voltages of each battery cluster in the battery cluster group can be detected, and the battery cluster corresponding to the minimum voltage and the battery clusters with the difference between the voltage and the minimum voltage less than a preset value are determined as the first battery cluster.

[0095] The preset value is the safe range of the voltage difference at which the battery clusters can be connected in parallel. When the battery clusters corresponding to the voltages within this range are directly connected in parallel, the current flow is small, there is no excessive equalizing current, and it will not cause damage to the battery clusters.

[0096] The second battery cluster is any battery cluster in the battery cluster group except the first battery cluster, and it can be the battery cluster with the largest voltage.

[0097] The first contactor and the second contactor of the first battery cluster can be closed first, and then the second battery cluster can be closed to make the second battery cluster charge the first battery cluster. After the voltage is balanced, compare the difference between the voltage of the closed battery clusters and the voltage of the remaining unclosed battery clusters. If this difference is less than the preset value, it means that it is safe to close the remaining battery clusters, and then close the remaining battery clusters in the battery cluster group.

[0098] If this difference is greater than or equal to the preset value, the second battery cluster can be determined from the remaining battery clusters and closed. After the voltage is balanced, compare the difference between the voltage of the closed battery clusters and the voltage of the remaining unclosed battery clusters. If this difference is less than the preset value, the remaining battery clusters can be directly closed, and finally all the battery clusters in the battery cluster group are closed.

[0099] By first closing the first contactor and the second contactor of the first battery cluster, the battery clusters can be safely connected in parallel, and the second battery cluster can charge the first battery cluster to achieve voltage balance, ensuring efficient and safe convergence. At the same time, by directly closing the remaining battery clusters when the voltage difference between the unclosed battery clusters and the closed battery clusters is less than the preset value, on the basis of ensuring safety, the problem of long closing time caused by closing the battery clusters sequentially is avoided, and the efficiency of the battery cluster convergence is improved.

[0100] S302. After the first contactors and the second contactors of all the battery clusters in the battery cluster group are closed, close the circuit breaker corresponding to the battery cluster group to achieve the parallel connection of the battery cluster groups corresponding to multiple circuit breakers.

[0101] A stable input current helps to improve the performance and output quality of the converter. After the first contactors and the second contactors of all the battery clusters in the battery cluster group are closed, closing the circuit breaker corresponding to the battery cluster group can enable the converter to quickly reach a stable state after starting to work.

[0102] Optionally, in some cases, not all the battery clusters in the battery cluster group are available. For such a situation, closing the first contactors and the second contactors of all the battery clusters in the battery cluster group includes:

[0103] First, close the first contactor and the second contactor of the third battery cluster in the battery cluster group, and then close the first contactor and the second contactor of the fourth battery cluster in the battery cluster group; after closing the first contactor and the second contactor of the fourth battery cluster, if the difference between the voltage of the battery cluster group and the voltage of the remaining enabled battery clusters in the battery cluster group is less than a preset value, then close the first contactors and the second contactors of the remaining enabled battery clusters in the battery cluster group.

[0104] After the first contactors and the second contactors of all the battery clusters in the battery cluster group are closed, closing the circuit breaker corresponding to the battery cluster group includes: after the first contactors and the second contactors of all the enabled battery clusters in the battery cluster group are closed, closing the circuit breaker corresponding to the battery cluster group.

[0105] Among them, the third battery cluster is the battery cluster with the minimum voltage among the enabled battery clusters in the battery cluster group, and the fourth battery cluster is any enabled battery cluster in the battery cluster group except the third battery cluster.

[0106] An enabled battery cluster refers to a battery cluster that can be used normally. The state of the battery cluster can be detected by the management system configured in the container, and the enabled state of the battery cluster can be configured according to the state of the battery cluster.

[0107] A battery cluster with abnormal performance, over-discharged or over-charged can be modified to a non-enabled state to avoid the risk of failure caused by continued use of this battery cluster.

[0108] If there is no enabled battery cluster in this battery cluster group, replace other battery cluster busbar systems. If all the battery clusters in this battery cluster group are in the enabled state, close the first contactors and the second contactors of all the battery clusters. If there are both enabled battery clusters and non-enabled battery clusters in this battery cluster group, close the enabled battery clusters and control the corresponding converter to turn on the power consumption reduction mode for use.

[0109] The third battery cluster is the battery cluster with the minimum voltage among the enabled battery clusters in the battery cluster group, or it can be 2 or more battery clusters with the minimum voltage among the enabled battery clusters in the battery cluster group. Specifically, the voltages of the enabled battery clusters in the battery cluster group can be detected, and the battery cluster corresponding to the minimum voltage and the battery clusters with the difference between the voltage and the minimum voltage less than a preset value are determined as the third battery clusters.

[0110] The fourth battery cluster is any enabled battery cluster in the battery cluster group except the first battery cluster, and it can be the battery cluster with the maximum voltage among the enabled battery clusters.

[0111] If the difference is greater than or equal to the preset value, the fourth battery cluster is determined from the remaining enabled battery clusters, and the fourth battery cluster is closed. After the voltages of the battery clusters to be closed are balanced, if the difference between the voltage of the battery cluster group and the voltages of the remaining enabled battery clusters in the battery cluster group is less than the preset value, the remaining enabled battery clusters in the battery cluster group are closed, and finally all the enabled battery clusters in the battery cluster group are closed.

[0112] By detecting the enabled states of the battery clusters and only using the enabled battery clusters, it is possible to prevent performance anomalies or safety problems caused by using abnormal battery clusters, extend the service life of the system, reduce the risk of damage, and enhance the reliability of the system.

[0113] S303. Detect the working states of each circuit breaker.

[0114] S304. When the working state of at least one detected circuit breaker is off, turn off each circuit breaker.

[0115] S305. After receiving the shutdown instruction, turn off each circuit breaker.

[0116] The shutdown instruction specifically refers to the instruction received by the control unit for the battery cluster bus system to stop being used. It can be through the button set on the container. When the button is clicked, it is considered that the battery cluster bus system stops being used. It can also be based on specific conditions, such as detecting that the grid power supply resumes normal, or setting the battery cluster bus system to stop working regularly, etc.

[0117] S306. For each battery cluster group corresponding to a circuit breaker, after turning off the circuit breaker corresponding to the battery cluster group, turn off the first contactor and the second contactor of each battery cluster in the battery cluster group.

[0118] To ensure the safety of the converter and the electrical equipment, first turn off the circuit breaker corresponding to the battery cluster group, and then turn off the first contactor and the second contactor of each battery cluster in the battery cluster group.

[0119] By first disconnecting the circuit breaker on the load side and then disconnecting the first and second contactors of the battery cluster, the electrical equipment and the converter can be protected from voltage dips or sudden changes in instantaneous current, and the continuous discharge of the battery cluster can be avoided, thus preventing the impact on the lifespan of the energy storage components.

[0120] In this embodiment, by using a battery cluster in a normally open state, the battery cluster will not be connected to other battery clusters when not needed, preventing the consumption of the battery cluster, reducing the risk of short circuit or overload, and extending the service life of the battery cluster. For the battery cluster in the normally open state, first close the first and second contactors of the battery cluster, and then close the corresponding circuit breaker of the battery cluster group, ensuring that the current input to the converter is stable, which can guarantee the efficient operation of the battery cluster busbar system and the service life of the electrical equipment.

[0121] Optionally, the interlock flag bit can be set to achieve the interlock control of multiple circuit breakers. The specific setting method is as follows: after detecting that the operating states of multiple circuit breakers are closed, set the interlock flag bit to 1; after detecting that the operating state of any one circuit breaker is open, set the interlock flag bit to 0, so as to disconnect each circuit breaker when the interlock flag bit is 0.

[0122] The interlock flag bit can be automatically set according to the operating state of the circuit breaker. When the operating states of multiple circuit breakers are all closed, it indicates that the multiple circuit breakers corresponding to the converter are closed, and their operating states need to be kept consistent. Then, after detecting the closure of multiple circuit breakers, set the interlock flag bit to 1.

[0123] When the operating state of any one circuit breaker is open, it means that the system has received a shutdown command or the battery cluster corresponding to the circuit breaker has an abnormality. Then, it is necessary to disconnect the multiple circuit breakers corresponding to the converter, set the interlock flag bit to 0, and disconnect each circuit breaker.

[0124] By using the interlock flag bit to achieve unified control of multiple circuit breakers corresponding to a converter, the control logic can be simplified and the response speed of the system can be improved. Moreover, with one interlock flag bit, the delay caused by processing multiple independent signals is reduced, and it is not easy to make mistakes. Compared with the mechanical interlock circuit breaker, the staff can also clearly know the operating state of the circuit breaker by monitoring the interlock flag bit without checking one by one.

[0125] Figure 4 This is a schematic flowchart of another battery cluster busbar method provided by the embodiment of the present application. As Figure 4 shown, the battery cluster busbar method mainly includes the following steps:

[0126] S401. After receiving the bus connection instruction, for the battery cluster groups corresponding to the multiple circuit breakers indicated by the bus connection instruction, first close the first contactor and the second contactor of the third battery cluster in the battery cluster group, and then close the first contactor and the second contactor of the fourth battery cluster in the battery cluster group.

[0127] Among them, the third battery cluster is the battery cluster with the minimum voltage among the enabled battery clusters in the battery cluster group, and the fourth battery cluster is any enabled battery cluster in the battery cluster group except the third battery cluster.

[0128] S402. If the difference between the voltage of the battery cluster group and the voltages of the remaining enabled battery clusters in the battery cluster group is less than the preset value, then close the first contactor and the second contactor of the remaining enabled battery clusters in the battery cluster group.

[0129] If the difference is greater than or equal to the preset value, then determine the fourth battery cluster from the remaining enabled battery clusters, and close the fourth battery cluster. After the voltage of the battery cluster to be closed is balanced, repeat step S402 to close the first contactor and the second contactor of all the enabled battery clusters in the battery cluster group.

[0130] S403. Close the circuit breaker corresponding to the battery cluster group.

[0131] After closing the circuit breaker of the battery cluster group, set the interlock flag to 1.

[0132] S404. Determine whether the operating state of at least one circuit breaker is open. If so, execute step S405; if not, execute step S406 when receiving the shutdown instruction.

[0133] S405. Open each circuit breaker.

[0134] When the operating state of at least one detected circuit breaker is open, set the interlock flag to 0 and open each circuit breaker.

[0135] S406. After receiving the shutdown instruction, open each circuit breaker.

[0136] When receiving the shutdown instruction, set the interlock flag to 0 and open each circuit breaker.

[0137] S407. For each battery cluster group, after opening the circuit breaker corresponding to the battery cluster group, open the first contactor and the second contactor of each battery cluster in the battery cluster group.

[0138] The battery cluster bus connection method provided in this embodiment has the same implementation principle and technical effects as the above embodiment, and will not be elaborated here.

[0139] Figure 5The figure is a schematic structural diagram of a battery cluster busbar connection device provided by an embodiment of the present application, which is applied to Figure 1 the control unit in the battery cluster busbar connection system of Figure 5 As shown in Figure 5 , the battery cluster busbar connection device 50 provided in this embodiment includes: a busbar connection instruction execution module 501, a circuit breaker detection module 502, and an interlock control module 503.

[0140] The busbar connection instruction execution module 501 is configured to, after receiving a busbar connection instruction, control the operating states of a plurality of circuit breakers to be closed based on the busbar connection instruction, so as to parallel the battery cluster groups corresponding to the plurality of circuit breakers, and achieve busbar connection among a plurality of energy storage components; the circuit breaker detection module 502 is configured to detect the operating states of the respective circuit breakers; the interlock control module 503 is configured to disconnect each circuit breaker when the operating state of at least one detected circuit breaker is open.

[0141] In a possible implementation manner, the positive electrode and the negative electrode of the battery cluster are respectively connected to the positive busbar and the negative busbar through a first contactor and a second contactor. The same battery cluster group corresponds to the same set of positive busbar and negative busbar. The circuit breaker corresponding to the battery cluster group is connected to the same set of positive busbar and negative busbar corresponding to the battery cluster group. The busbar connection instruction execution module 501 includes a contactor closing unit and a circuit breaker closing unit, where:

[0142] The contactor closing unit is configured to, after receiving a busbar connection instruction, close the first contactor and the second contactor of each battery cluster in the battery cluster group corresponding to the plurality of circuit breakers indicated by the busbar connection instruction; the circuit breaker closing unit is configured to, after the first contactor and the second contactor of each battery cluster in the battery cluster group are both closed, close the circuit breaker corresponding to the battery cluster group, so as to parallel the battery cluster groups corresponding to the plurality of circuit breakers.

[0143] In a possible implementation manner, the contactor closing unit is specifically configured to:

[0144] After receiving a busbar connection instruction, for the battery cluster group corresponding to the plurality of circuit breakers indicated by the busbar connection instruction, first close the first contactor and the second contactor of the first battery cluster in the battery cluster group, and then close the first contactor and the second contactor of the second battery cluster in the battery cluster group; after closing the first contactor and the second contactor of the second battery cluster, if the difference between the voltage of the battery cluster group and the voltages of the remaining battery clusters in the battery cluster group is less than a preset value, then close the remaining battery clusters in the battery cluster group; where the first battery cluster is the battery cluster with the lowest voltage in the battery cluster group, and the second battery cluster is any battery cluster other than the first battery cluster in the battery cluster group.

[0145] In a possible implementation, the contactor closing unit is specifically configured to: after receiving the bus connection instruction, for the battery cluster groups corresponding to multiple circuit breakers indicated by the bus connection instruction, first close the first contactor and the second contactor of the third battery cluster in the battery cluster group, and then close the first contactor and the second contactor of the fourth battery cluster in the battery cluster group; after closing the first contactor and the second contactor of the fourth battery cluster, if the difference between the voltage of the battery cluster group and the voltages of the remaining enabled battery clusters in the battery cluster group is less than a preset value, then close the first contactor and the second contactor of the remaining enabled battery clusters in the battery cluster group.

[0146] The circuit breaker closing unit is specifically configured to: after the first contactor and the second contactor of each enabled battery cluster in the battery cluster group are closed, close the circuit breaker corresponding to the battery cluster group; wherein, the third battery cluster is the battery cluster with the lowest voltage among the enabled battery clusters in the battery cluster group, and the fourth battery cluster is any enabled battery cluster in the battery cluster group except the first battery cluster.

[0147] In a possible implementation, the battery cluster bus connection device 50 further includes a shutdown instruction module and a chain flag bit module, where:

[0148] The shutdown instruction module is configured to, after receiving the shutdown instruction, disconnect each circuit breaker, and for each battery cluster group corresponding to each circuit breaker, after disconnecting the circuit breaker corresponding to the battery cluster group, disconnect the first contactor and the second contactor of each battery cluster in the battery cluster group;

[0149] The chain flag bit module sets the chain flag bit to 1 after detecting that the operating states of multiple circuit breakers are closed, and sets the chain flag bit to 0 after detecting that the operating state of any one circuit breaker is disconnected, so as to disconnect each circuit breaker when the chain flag bit is 0.

[0150] The battery cluster bus connection device provided in this embodiment can execute the battery cluster bus connection method provided in the above method embodiment, and its implementation principle and technical effects are similar, which will not be elaborated here in this embodiment.

[0151] Figure 6 It is a schematic structural diagram of a battery cluster bus connection system provided in an embodiment of the present application. As Figure 6 shown, the battery cluster bus connection system 60 provided in this embodiment includes: a plurality of energy storage components 601, a plurality of circuit breakers 602, and a control unit 603.

[0152] The energy storage component 602 includes at least one battery cluster group, each energy storage component 601 and the circuit breaker 602 corresponding to the battery cluster group included therein are placed in a container, and the battery cluster group includes at least one battery cluster;

[0153] Multiple circuit breakers 602 are used to control the parallel connection of corresponding battery cluster groups, and the multiple circuit breakers are located in multiple containers;

[0154] The control unit 603 is used to execute the battery cluster busbar connection method provided in the above embodiment.

[0155] Optionally, the positive and negative electrodes of the battery cluster are respectively connected to the positive busbar and the negative busbar through a first contactor and a second contactor. The same battery cluster group corresponds to the same set of positive busbar and negative busbar, and the circuit breaker corresponding to the battery cluster group is connected to the same set of positive busbar and negative busbar corresponding to the battery cluster group.

[0156] The battery cluster busbar connection system provided in this embodiment can implement the method provided in the above method embodiment, and its implementation principle and technical effects are similar, which will not be elaborated here in this embodiment.

[0157] This application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0158] This application also provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the processor executes the computer-executable instructions, the above method is implemented.

[0159] The above-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random-Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0160] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in a device.

[0161] The division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed among each other can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0162] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0163] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0164] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (Random Access Memory, RAM), magnetic disks or optical discs that can store program codes.

[0165] Those of ordinary skill in the art will understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including those of the above method embodiments; and the aforementioned storage medium includes: various media such as ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0166] Finally, it should be noted that those skilled in the art will readily think of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A battery cluster busbar connection method, characterized in that, A control unit applied to a battery cluster busbar system, the battery cluster busbar system including a plurality of energy storage components and a plurality of circuit breakers, the energy storage components including at least one battery cluster group, a circuit breaker corresponding to each energy storage component and the battery cluster group included therein being placed in a container, and the battery cluster group including at least one battery cluster; The plurality of circuit breakers are used to control the parallel connection of the corresponding battery cluster groups, and the plurality of circuit breakers are located in the plurality of containers; the method includes: After receiving a busbar connection instruction, based on the busbar connection instruction, controlling the working states of the plurality of circuit breakers to be closed so as to parallel-connect the battery cluster groups corresponding to the plurality of circuit breakers, thereby realizing busbar connection among the plurality of energy storage components; Detecting the working states of the respective circuit breakers; When the working state of at least one of the detected circuit breakers is open, opening all the circuit breakers.

2. The method according to claim 1, characterized in that, The positive electrode and the negative electrode of the battery cluster are respectively connected to a positive busbar and a negative busbar through a first contactor and a second contactor, the same battery cluster group corresponds to the same set of positive busbar and negative busbar, and the circuit breaker corresponding to the battery cluster group is connected to the same set of positive busbar and negative busbar corresponding to the battery cluster group; After receiving a busbar connection instruction, based on the busbar connection instruction, controlling the working states of the plurality of circuit breakers to be closed includes: After receiving the busbar connection instruction, for the battery cluster groups corresponding to the plurality of circuit breakers indicated by the busbar connection instruction, closing the first contactor and the second contactor of each battery cluster in the battery cluster group; After the first contactor and the second contactor of each battery cluster in the battery cluster group are both closed, closing the circuit breaker corresponding to the battery cluster group to realize the parallel connection of the battery cluster groups corresponding to the plurality of circuit breakers.

3. The method according to claim 2, wherein Closing the first contactor and the second contactor of each battery cluster in the battery cluster group includes: First closing the first contactor and the second contactor of the first battery cluster in the battery cluster group, and then closing the first contactor and the second contactor of the second battery cluster in the battery cluster group; After closing the first contactor and the second contactor of the second battery cluster, if the difference between the voltage of the battery cluster group and the voltages of the remaining battery clusters in the battery cluster group is less than a preset value, closing the first contactor and the second contactor of the remaining battery clusters in the battery cluster group; Wherein, the first battery cluster is the battery cluster with the minimum voltage in the battery cluster group, and the second battery cluster is any battery cluster in the battery cluster group except the first battery cluster.

4. The method according to claim 2, wherein Closing the first contactor and the second contactor of each battery cluster in the battery cluster group includes: First closing the first contactor and the second contactor of the third battery cluster in the battery cluster group, and then closing the first contactor and the second contactor of the fourth battery cluster in the battery cluster group; After closing the first contactor and the second contactor of the fourth battery cluster, if the difference between the voltage of the battery cluster group and the voltages of the remaining enabled battery clusters in the battery cluster group is less than a preset value, closing the first contactor and the second contactor of the remaining enabled battery clusters in the battery cluster group; After the first contactor and the second contactor of each battery cluster in the battery cluster group are both closed, closing the circuit breaker corresponding to the battery cluster group includes: After the first contactor and the second contactor of each battery cluster in the enabled state within the battery cluster group are both closed, close the circuit breaker corresponding to the battery cluster group; Wherein, the third battery cluster is the battery cluster with the minimum voltage among the battery clusters in the enabled state within the battery cluster group, and the fourth battery cluster is any enabled battery cluster other than the third battery cluster within the battery cluster group.

5. The method according to any one of claims 2 to 4, wherein The method further includes: After receiving a shutdown instruction, disconnect each of the circuit breakers; For each battery cluster group corresponding to the circuit breakers, after disconnecting the circuit breaker corresponding to the battery cluster group, disconnect the first contactor and the second contactor of each battery cluster within the battery cluster group.

6. The method according to claim 1, characterized in that, The method further includes: After detecting that the operating state of the multiple circuit breakers is closed, set the interlock flag to 1; After detecting that the operating state of any one of the circuit breakers is open, set the interlock flag to 0, so as to disconnect each of the circuit breakers when the interlock flag is 0.

7. A battery cluster busbar device, characterized in that, Applied to a control unit of a battery cluster busbar system, the battery cluster busbar system includes a plurality of energy storage components and a plurality of circuit breakers, the energy storage components include at least one battery cluster group, each energy storage component and the circuit breaker corresponding to the battery cluster group it includes are placed in a container, the battery cluster group includes at least one battery cluster; the plurality of circuit breakers are used to control the parallel connection of the corresponding battery cluster groups, the plurality of circuit breakers are located in a plurality of the containers, and the device includes: A busbar connection instruction execution module, configured to, after receiving a busbar connection instruction, based on the busbar connection instruction, control the operating states of the plurality of circuit breakers to be closed, so as to parallel-connect the battery cluster groups corresponding to the plurality of circuit breakers, and achieve busbar connection among the plurality of energy storage components; A circuit breaker detection module, configured to detect the operating states of each of the circuit breakers; An interlock control module, configured to disconnect each of the circuit breakers when detecting that the operating state of at least one of the circuit breakers is open.

8. A battery cluster busbar system, characterized in that, Includes: A plurality of energy storage components, a plurality of circuit breakers and a control unit; The energy storage components include at least one battery cluster group, each energy storage component and the circuit breaker corresponding to the battery cluster group it includes are placed in a container, the battery cluster group includes at least one battery cluster; The plurality of circuit breakers are used to control the parallel connection of the corresponding battery cluster groups, and the plurality of circuit breakers are located in a plurality of the containers; The control unit is configured to execute the method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of claims 1-6.

10. A computer program product, characterized in that, Includes a computer program, and when the computer program is executed by a processor, it implements the method according to any one of claims 1-6.

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