Intelligent control circuit and method for two-in-one high-voltage box of energy storage system, and high-voltage box

Abstract

The invention relates to the field of battery management and control, and discloses an intelligent control circuit and method for a two-in-one high-voltage box of an energy storage system, and the high-voltage box, by implementing the intelligent control circuit and method, intelligent management and protection of a plurality of battery packs by one high-voltage box can be realized through cooperative work of a communication sub-circuit and a plurality of battery management sub-circuits; specifically, the intelligent control circuit can obtain and transmit a battery pack signal to a matched battery management sub-circuit in real time, so that multiple battery management and control operations including overload, overcurrent, overvoltage, over-temperature, short-circuit protection, power-on and power-off switching and the like are executed, and the use safety of the intelligent control circuit is effectively improved; different from the traditional mode that only one battery management sub-circuit is integrated in one high-voltage box, the battery management sub-circuits can be integrated in one high-voltage box, so that the installation space of the high-voltage box is reduced, the utilization rate of the space in the high-voltage box is improved, and the wiring complexity between the high-voltage box and the battery pack can be reduced.

Description

Technical Field

[0001] The present application relates to the field of battery management technology, and in particular to an intelligent control circuit and method for a two-in-one high-voltage box of an energy storage system, and a high-voltage box. Background Art

[0002] In the current energy storage system technology landscape, high-voltage boxes, as core components connecting energy storage battery packs to external devices, play a crucial role. Traditionally, these boxes integrate key protection and control components such as circuit breakers and pre-charge relays. These designs aim to provide multiple safety mechanisms, including overcurrent, overvoltage, undervoltage, and short circuit protection, to ensure the stable operation of the entire energy storage system. In liquid-cooled energy storage systems, in particular, a common approach is to configure a high-voltage box for each battery pack cluster, and install a battery management system (BMS) within each box.

[0003] As an important component of the high-voltage box, the BMS is responsible for monitoring and managing the real-time operating status of the corresponding battery pack, which includes accurately measuring key parameters such as battery voltage, current, and temperature. Through continuous data collection and analysis, the BMS can effectively prevent safety hazards in battery pack operation and optimize energy distribution, thereby achieving safe and efficient operation of the battery pack. However, as the scale of energy storage systems continues to expand, that is, when the number of battery clusters (N clusters) in the energy storage system increases, conventional technology usually adopts the configuration of N high-voltage boxes equal to the number of battery clusters to achieve battery cluster management.

[0004] However, since information exchange between multiple high-voltage boxes is crucial to the overall coordination and control of the energy storage system, existing communication solutions often rely on complex wiring networks, which greatly increases the installation complexity of the high-voltage boxes. Summary of the Invention

[0005] The present application provides an intelligent control circuit and method for a two-in-one high-voltage box of an energy storage system, which can integrate at least two battery management systems in the same high-voltage box, reducing the wiring complexity between the high-voltage box and multiple battery clusters and external communication components.

[0006] In order to solve the above technical problems, the first aspect of the present application discloses an intelligent control circuit for a two-in-one high-voltage box of an energy storage system, wherein the intelligent control circuit includes a communication subcircuit and multiple battery management subcircuits, wherein:

[0007] The first end of each of the battery management subcircuits is electrically connected to the first communication end of the communication subcircuit; the second communication end of the communication subcircuit is used to electrically connect to two battery packs respectively;

[0008] The communication subcircuit is used to obtain a battery pack signal corresponding to each of the battery packs, and transmit the battery pack signal corresponding to each of the battery packs to the battery management subcircuit that matches the battery pack among all the battery management subcircuits;

[0009] The battery management subcircuit is used to perform a battery management operation on the battery corresponding to the battery pack signal according to the battery pack signal after receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit. The battery management operation includes at least one operation of an overload protection operation, an overcurrent protection operation, an overvoltage protection operation, an overtemperature protection operation, a short-circuit protection operation, and a power-on and power-off switching operation.

[0010] As an optional implementation, in the first aspect of the present application, the battery management subcircuit includes a positive electrode protection module, a switch module, and a negative electrode protection module, wherein:

[0011] The first end of the positive electrode protection module is electrically connected to the positive end of the communication sub-circuit; the second end of the positive electrode protection module is electrically connected to the first end of the switch module; the second end of the switch module is used to connect to the combiner cabinet; the third end of the switch module is electrically connected to the first end of the negative electrode protection module; the second end of the negative electrode protection module is electrically connected to the negative end of the communication sub-circuit;

[0012] The positive electrode protection module is configured to, after receiving a battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, determine a first circuit state corresponding to the positive electrode side of the battery management subcircuit based on the battery pack signal, and perform a preset positive electrode protection operation based on the first circuit state, the positive electrode protection operation including a short-circuit protection operation for the positive electrode side and / or a power-on / power-off switching operation;

[0013] The switch module is used to perform opening and closing switching operations on the battery management sub-circuit;

[0014] The negative electrode protection module is used to determine the second circuit state corresponding to the negative electrode side in the battery management subcircuit according to the battery pack signal, and perform a preset negative electrode protection operation according to the second circuit state. The negative electrode protection operation includes a short-circuit protection operation for the negative electrode side, and / or a power-on and power-off switching operation.

[0015] As an optional implementation, in the first aspect of the present application, the battery management subcircuit further includes a positive electrode sensing module and a negative electrode sensing module, wherein:

[0016] The second end of the switch module is electrically connected to the first end of the positive sensor module; the second end of the positive sensor module is used to connect to the combiner cabinet;

[0017] The second end of the negative electrode protection module is electrically connected to the first end of the negative electrode sensor module; the second end of the negative electrode sensor module is electrically connected to the negative end of the communication sub-circuit.

[0018] As an optional embodiment, in the first aspect of the present application, the positive electrode sensing module is used to collect the positive electrode current on the positive electrode side, and the positive electrode current is used to indicate whether it is necessary to control the positive electrode protection module to perform the positive electrode protection operation, and / or to indicate whether it is necessary to control the switch module to perform the opening and closing switching operation;

[0019] The negative electrode sensing module is used to collect the negative electrode current on the negative electrode side. The negative electrode current is used to indicate whether it is necessary to control the negative electrode protection module to perform the negative electrode protection operation, and / or to indicate whether it is necessary to control the switch module to perform the opening and closing switching operation.

[0020] As an optional implementation, in the first aspect of the present application, the positive electrode protection module includes a positive fuse and a positive relay, wherein:

[0021] The first end of the positive fuse is electrically connected to the positive end of the communication sub-circuit; the second end of the positive fuse is electrically connected to the first end of the positive relay; the second end of the positive relay is electrically connected to the first end of the switch module;

[0022] The positive fuse is configured to perform fusing control on the positive fuse when it is determined that the first current flowing through the positive fuse reaches a preset fusing condition of the positive fuse;

[0023] The positive relay is used to switch the positive relay from a power-on state to a power-off state when it is determined that the second current flowing through the positive relay reaches a preset switching condition of the positive relay.

[0024] As an optional implementation, in the first aspect of the present application, the negative electrode protection module includes a negative fuse and a negative relay, wherein:

[0025] The third end of the switch module is electrically connected to the first end of the negative relay; the second end of the negative relay is electrically connected to the first end of the negative fuse; the second end of the negative fuse is electrically connected to the first end of the negative electrode sensor module;

[0026] The negative fuse is configured to perform fusing control on the negative fuse when it is determined that the third current flowing through the negative fuse reaches a preset fusing condition of the negative fuse;

[0027] The negative relay is used to switch the negative relay from a power-on state to a power-off state when it is determined that the fourth current flowing through the negative relay reaches a preset switching condition of the negative relay.

[0028] As an optional implementation, in the first aspect of the present application, the positive electrode sensing module is a Hall sensor; and the negative electrode sensing module is a shunt.

[0029] A second aspect of the present application discloses an intelligent control method for a two-in-one high-voltage box of an energy storage system. The method is applied to an intelligent control circuit of the two-in-one high-voltage box of the energy storage system. The intelligent control circuit includes a communication subcircuit and multiple battery management subcircuits, wherein: a first end of each of the battery management subcircuits is electrically connected to a first communication end of the communication subcircuit; and a second communication end of the communication subcircuit is used to electrically connect to two battery packs respectively.

[0030] The method comprises:

[0031] The communication subcircuit acquires a battery pack signal corresponding to each battery pack, and transmits the battery pack signal corresponding to each battery pack to a battery management subcircuit matching the battery pack among all the battery management subcircuits;

[0032] After receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the battery management subcircuit performs a battery management operation on the battery corresponding to the battery pack signal according to the battery pack signal. The battery management operation includes at least one of an overload protection operation, an overcurrent protection operation, an overvoltage protection operation, an overtemperature protection operation, a short-circuit protection operation, and a power-on / off switching operation.

[0033] As an optional embodiment, in the second aspect of the present application, the battery management subcircuit includes a positive electrode protection module, a switch module, and a negative electrode protection module, wherein: the first end of the positive electrode protection module is electrically connected to the positive end of the communication subcircuit; the second end of the positive electrode protection module is electrically connected to the first end of the switch module; the second end of the switch module is used to connect to a junction box; the third end of the switch module is electrically connected to the first end of the negative electrode protection module; the second end of the negative electrode protection module is electrically connected to the negative end of the communication subcircuit;

[0034] After receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the battery management subcircuit performs a battery management and control operation on the battery corresponding to the battery pack signal according to the battery pack signal, including:

[0035] After receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the positive electrode protection module determines a first circuit state corresponding to the positive electrode side of the battery management subcircuit according to the battery pack signal, and performs a preset positive electrode protection operation according to the first circuit state, wherein the positive electrode protection operation includes a short-circuit protection operation for the positive electrode side and / or a power-on / power-off switching operation;

[0036] The switch module performs opening and closing switching operations on the battery management sub-circuit;

[0037] The negative electrode protection module determines the second circuit state corresponding to the negative electrode side in the battery management subcircuit according to the battery pack signal, and performs a preset negative electrode protection operation according to the second circuit state. The negative electrode protection operation includes a short-circuit protection operation for the negative electrode side, and / or a power-on and power-off switching operation.

[0038] As an optional implementation, in the second aspect of the present application, the battery management subcircuit further includes a positive electrode sensing module and a negative electrode sensing module, wherein:

[0039] The second end of the switch module is electrically connected to the first end of the positive sensor module; the second end of the positive sensor module is used to connect to the combiner cabinet;

[0040] The second end of the negative electrode protection module is electrically connected to the first end of the negative electrode sensor module; the second end of the negative electrode sensor module is electrically connected to the negative end of the communication sub-circuit.

[0041] As an optional implementation, in the second aspect of the present application, after receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the battery management subcircuit performs a battery management and control operation on the battery corresponding to the battery pack signal according to the battery pack signal, further comprising:

[0042] The positive electrode current on the positive electrode side is collected by the positive electrode sensing module, and the positive electrode current is used to indicate whether it is necessary to control the positive electrode protection module to perform the positive electrode protection operation, and / or to indicate whether it is necessary to control the switch module to perform the opening and closing switching operation;

[0043] The negative electrode current on the negative electrode side is collected by the negative electrode sensing module, and the negative electrode current is used to indicate whether it is necessary to control the negative electrode protection module to perform the negative electrode protection operation, and / or to indicate whether it is necessary to control the switch module to perform the opening and closing switching operation.

[0044] As an optional implementation, in the second aspect of the present application, the positive electrode protection module includes a positive fuse and a positive relay, wherein:

[0045] The first end of the positive fuse is electrically connected to the positive end of the communication sub-circuit; the second end of the positive fuse is electrically connected to the first end of the positive relay; the second end of the positive relay is electrically connected to the first end of the switch module;

[0046] The positive electrode protection module performs a preset positive electrode protection operation according to the first circuit state, including:

[0047] When the positive fuse determines that the first current flowing through the positive fuse reaches a preset fusing condition of the positive fuse, the positive fuse performs fusing control on the positive fuse;

[0048] When the positive relay determines that the second current flowing through the positive relay reaches a preset switching condition of the positive relay, the positive relay is switched from the power-on state to the power-off state.

[0049] As an optional implementation, in the second aspect of the present application, the negative electrode protection module includes a negative fuse and a negative relay, wherein:

[0050] The third end of the switch module is electrically connected to the first end of the negative relay; the second end of the negative relay is electrically connected to the first end of the negative fuse; the second end of the negative fuse is electrically connected to the first end of the negative electrode sensor module;

[0051] The negative electrode protection module performs a preset negative electrode protection operation according to the second circuit state, including:

[0052] When the negative fuse determines that the third current flowing through the negative fuse reaches a preset fusing condition of the negative fuse, the negative fuse performs fusing control on the negative fuse;

[0053] When the negative relay determines that the fourth current flowing through the negative relay reaches a preset switching condition of the negative relay, the negative relay is switched from the power-on state to the power-off state.

[0054] As an optional implementation, in the second aspect of the present application, the positive electrode sensing module is a Hall sensor; and the negative electrode sensing module is a shunt.

[0055] The third aspect of the present application discloses a high-voltage box, which includes a high-voltage box body, and the high-voltage box also includes an intelligent control circuit of the two-in-one high-voltage box of the energy storage system disclosed in the first aspect of the present application, and the high-voltage box is used to execute the intelligent control method of the two-in-one high-voltage box of the energy storage system disclosed in the second aspect of the present application.

[0056] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0057] In an embodiment of the present application, an intelligent control circuit of a two-in-one high-voltage box of an energy storage system is provided, the intelligent control circuit including a communication subcircuit and multiple battery management subcircuits, wherein: the first end of each battery management subcircuit is electrically connected to the first communication end of the communication subcircuit; the second communication end of the communication subcircuit is used to electrically connect to two battery packs respectively; the communication subcircuit is used to obtain the battery pack signal corresponding to each battery pack, and transmit the battery pack signal corresponding to each battery pack to the battery management subcircuit matching the battery pack in all battery management subcircuits; the battery management subcircuit is used to perform a battery management operation on the battery corresponding to the battery pack signal according to the battery pack signal after receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the battery management operation including at least one of an overload protection operation, an overcurrent protection operation, an overvoltage protection operation, an overtemperature protection operation, a short circuit protection operation, and an up and down power switching operation. It can be seen that the implementation of this application realizes the intelligent management and protection of multiple battery packs by a high-voltage box through the coordinated work of the communication sub-circuit and multiple battery management sub-circuits; specifically, the intelligent control circuit can obtain and transmit the battery pack signal to the matching battery management sub-circuit in real time, and then perform multiple battery management operations including overload, overcurrent, overvoltage, overtemperature, short circuit protection and power switching, which effectively improves the safety of the use of the intelligent control circuit; among them, different from the traditional high-voltage box that only integrates one battery management sub-circuit, the present application can integrate multiple battery management sub-circuits in a high-voltage box, and realize the reasonable configuration of multiple battery management sub-circuits in structure, reducing the installation space of the high-voltage box, improving the utilization rate of the space inside the high-voltage box, and reducing the wiring complexity between the high-voltage box and the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0059] Figure 1 This is a structural diagram of an intelligent control circuit of a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application;

[0060] Figure 2 This is a schematic diagram of the structure of a battery management subcircuit disclosed in an embodiment of the present application;

[0061] Figure 3 This is a structural diagram of another intelligent control circuit of a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application;

[0062] Figure 4This is a structural schematic diagram of a structural schematic diagram of an external panel of a high-voltage box disclosed in an embodiment of the present application;

[0063] Figure 5 This is a flow chart of an intelligent control method for a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application;

[0064] Figure 6 This is a flow chart of another intelligent control method for a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application;

[0065] Figure 7 This is a structural diagram of a high-voltage box disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0066] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] The terms "first," "second," and so on in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or end comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or end.

[0068] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0069] The present application discloses an intelligent control circuit and method for a two-in-one high-voltage box of an energy storage system, as well as a high-voltage box. Through the coordinated operation of a communication subcircuit and multiple battery management subcircuits, a high-voltage box is implemented to intelligently manage and protect multiple battery packs. Specifically, the intelligent control circuit can acquire and transmit battery pack signals to a matching battery management subcircuit in real time, thereby executing multiple battery management operations including overload, overcurrent, overvoltage, overtemperature, short-circuit protection, and power-on and power-off switching, effectively improving the safety of the intelligent control circuit. Unlike traditional high-voltage boxes that only integrate one battery management subcircuit, the present application can integrate multiple battery management subcircuits in one high-voltage box, structurally achieving a reasonable configuration of multiple battery management subcircuits, reducing the installation space of the high-voltage box, improving the utilization rate of the space inside the high-voltage box, and reducing the complexity of the wiring between the high-voltage box and the battery pack. These are described in detail below.

[0070] Example 1

[0071] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of an intelligent control circuit of a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application. The intelligent control circuit of the two-in-one high-voltage box of the energy storage system can be applied to a high-voltage box associated with an energy storage system. The energy storage system can be a liquid-cooled energy storage system or a solar energy storage system, which is not limited in the embodiment of the present application. Figure 1 As shown, the intelligent control circuit of the two-in-one high-voltage box of the energy storage system may include a communication subcircuit 10 and multiple battery management subcircuits 20, wherein:

[0072] The first terminal of each battery management subcircuit 20 is electrically connected to the first communication terminal of the communication subcircuit 10; the second communication terminal of the communication subcircuit 10 is used to electrically connect to the two battery packs respectively;

[0073] The communication sub-circuit 10 is used to obtain the battery pack signal corresponding to each battery pack and transmit the battery pack signal corresponding to each battery pack to the battery management sub-circuit 20 matching the battery pack among all the battery management sub-circuits 20;

[0074] The battery management subcircuit 20 is used to perform battery management operations on the battery corresponding to the battery pack signal according to the battery pack signal after receiving the battery pack signal transmitted by the communication subcircuit 10 and matching the battery management subcircuit 20. The battery management operations include at least one operation of overload protection operation, overcurrent protection operation, overvoltage protection operation, overtemperature protection operation, short-circuit protection operation, and power on and off switching operation.

[0075] In the embodiment of the present application, all battery management subcircuits included in the intelligent control circuit can use the same or different circuit structures, preferably using the same circuit structure. Furthermore, the number of battery management subcircuits can be increased or decreased based on actual usage requirements. As the number of battery management subcircuits integrated into the same high-voltage box increases, the corresponding integration difficulty also increases. Therefore, preferably, only two battery management subcircuits are integrated into the same high-voltage box.

[0076] In the embodiment of the present application, the battery management subcircuit can generally adopt a conventional BMS (battery management system), or can adopt other management systems with similar functions to the BMS, which is not limited in the embodiment of the present application.

[0077] In the examples of this application, please refer to Figure 3 , Figure 3 This is a structural diagram of another intelligent control circuit of a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application. Figure 3 As shown, the intelligent control circuit can be applied to a high-voltage box. Furthermore, two circuits of high-voltage electrical components (corresponding to the above two battery management sub-circuits) are installed in the same high-voltage box, namely the left circuit and the right circuit. Each circuit is independently controlled, and the two circuits share a high-voltage box casing.

[0078] In this embodiment of the present application, two battery management subcircuits integrated within the intelligent control circuit can manage the operating status of two battery packs, respectively. A single battery management subcircuit can monitor the voltage, current, and temperature of one battery pack in real time. By monitoring these parameters, the battery packs can ensure safe and efficient operation. Furthermore, the two battery management subcircuits communicate independently with the corresponding battery packs via a communication subcircuit, enabling independent control.

[0079] In this embodiment of the present application, two battery management subcircuits integrated within a single high-voltage box independently control and protect the safety of two battery clusters. The control signals of the high-voltage electrical components of the left circuit are all connected to one of the battery management subcircuits. The electrical components in the left circuit provide protection for the first battery cluster against overload, overcurrent, overvoltage, and overtemperature, and can also independently control the power-up and power-down of the first cluster. Similarly, the right circuit and the second battery management subcircuit provide control and protection for the second battery cluster. The two battery management subcircuits operate independently and do not affect each other.

[0080] In this embodiment, the two battery management subcircuits integrated within a single high-voltage box can be installed using a layered design: one battery management subcircuit is bolted to the box bottom plate, while the other is bolted to an "X"-shaped bracket. This facilitates wiring and saves space for the battery management subcircuits. Optionally, a sealing gasket can be installed on the high-voltage box lid, ensuring that the entire box meets the IP65 protection level safety requirements.

[0081] It can be seen that implementation Figure 1 The described intelligent control circuit of the two-in-one high-voltage box of the energy storage system realizes the intelligent management and protection of multiple battery packs by one high-voltage box through the coordinated work of the communication sub-circuit and multiple battery management sub-circuits; specifically, the intelligent control circuit can obtain and transmit the battery pack signal to the matching battery management sub-circuit in real time, and then perform multiple battery management operations including overload, overcurrent, overvoltage, overtemperature, short circuit protection and power switching, effectively improving the safety of the use of the intelligent control circuit; among them, different from the traditional high-voltage box that only integrates one battery management sub-circuit, the present application can integrate multiple battery management sub-circuits in one high-voltage box, structurally realize the reasonable configuration of multiple battery management sub-circuits, reduce the installation space of the high-voltage box, improve the utilization rate of the space inside the high-voltage box, and reduce the wiring complexity between the high-voltage box and the battery pack.

[0082] In an alternative embodiment, see Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery management sub-circuit disclosed in an embodiment of the present application. It should be noted that, Figure 2 Only the connection relationship between a single battery management subcircuit and a communication subcircuit is shown in the figure. Correspondingly, the connection relationship between multiple battery management subcircuits and communication subcircuits is the same as Figure 2 The structure shown is similar to Figure 2 No duplication is done in the display. Figure 2 As shown, the battery management sub-circuit 20 includes a positive electrode protection module 201, a switch module 202, and a negative electrode protection module 203, wherein:

[0083] The first end of the positive electrode protection module 201 is electrically connected to the positive end of the communication sub-circuit 10; the second end of the positive electrode protection module 201 is electrically connected to the first end of the switch module 202; the second end of the switch module 202 is used to connect to the combiner cabinet; the third end of the switch module 202 is electrically connected to the first end of the negative electrode protection module 203; the second end of the negative electrode protection module 203 is electrically connected to the negative end of the communication sub-circuit 10;

[0084] The positive electrode protection module 201 is configured to, upon receiving a battery pack signal matched with the battery management subcircuit 20 and transmitted by the communication subcircuit 10, determine a first circuit state corresponding to the positive electrode side of the battery management subcircuit 20 based on the battery pack signal, and perform a preset positive electrode protection operation based on the first circuit state. The positive electrode protection operation includes a short-circuit protection operation for the positive electrode side and / or a power-on / power-off switching operation.

[0085] The switch module 202 is used to perform opening and closing switching operations on the battery management sub-circuit 20;

[0086] The negative electrode protection module 203 is used to determine the second circuit state corresponding to the negative electrode side in the battery management subcircuit 20 based on the battery pack signal, and perform a preset negative electrode protection operation based on the second circuit state. The negative electrode protection operation includes a short-circuit protection operation for the negative electrode side, and / or a power-on and power-off switching operation.

[0087] In this optional embodiment, the positive electrode protection module 201 is further configured to, before executing a preset positive electrode protection operation according to the first circuit state, determine whether the first circuit state indicates that a preset positive electrode protection condition is currently satisfied, and if so, trigger execution of an operation corresponding to executing the preset positive electrode protection operation according to the first circuit state. The first circuit state indicating that the positive electrode protection condition is satisfied includes a short circuit in the positive electrode side circuit (e.g., a positive electrode side current greater than a first safety current set by the positive electrode protection module).

[0088] In this optional embodiment, the negative electrode protection module 203 is further configured to, before executing a preset negative electrode protection operation based on the second circuit state, determine whether the second circuit state indicates that a preset negative electrode protection condition is currently satisfied, and if so, trigger execution of an operation corresponding to executing a preset positive electrode protection operation based on the second circuit state. The second circuit state indicating that the negative electrode protection condition is satisfied includes a short circuit in the negative electrode side circuit (e.g., a negative electrode side current greater than a second safety current set by the negative electrode protection module).

[0089] In this optional embodiment, when the first circuit state indicates that the positive electrode side is operating normally, the positive electrode protection module maintains a standby state. When the first circuit state indicates that the positive electrode side is operating abnormally, the positive electrode protection module switches from the standby state to the start-up state, specifically starting to execute the positive electrode protection operation. It should be noted that the standby state here is the opposite of the start-up state. The standby state is used to indicate that the positive electrode protection operation is not started, but it can respond normally to the first circuit state. In addition, the start and stop of the negative electrode protection module are consistent with the start and stop of the positive electrode protection module, the only difference being that the negative electrode protection module monitors the circuit on the negative electrode side.

[0090] In this optional embodiment, the switch module can also automatically open or close the switch according to the battery pack signal, thereby realizing three-pole safety protection based on the positive electrode protection module, the switch module and the negative electrode protection module.

[0091] It can be seen that in this optional embodiment, the battery management subcircuit integrates positive electrode protection, switch control and negative electrode protection functions; specifically, the battery pack signal is received through the communication subcircuit, the positive electrode protection module and the negative electrode protection module receive the battery pack signal, and intelligently judge the circuit status through the battery pack signal, and then execute corresponding short-circuit protection and up and down power switching and other preset operations, thereby realizing fine management of the battery pack, which is beneficial to enhancing the safety, reliability and control flexibility of the intelligent control circuit.

[0092] In another optional embodiment, the battery management sub-circuit 20 further includes a positive electrode sensing module 204 and a negative electrode sensing module 205, wherein:

[0093] The second end of the switch module 202 is electrically connected to the first end of the positive sensor module 204; the second end of the positive sensor module 204 is used to connect to the combiner cabinet;

[0094] The second end of the negative electrode protection module 203 is electrically connected to the first end of the negative electrode sensor module 205 ; the second end of the negative electrode sensor module 205 is electrically connected to the negative end of the communication sub-circuit 10 .

[0095] In this optional embodiment, the positive electrode sensing module 204 is used to collect the positive electrode current on the positive electrode side, and the positive electrode current is used to indicate whether it is necessary to control the positive electrode protection module 201 to perform a positive electrode protection operation, and / or to indicate whether it is necessary to control the switch module 202 to perform an opening and closing switching operation;

[0096] The negative electrode sensing module 205 is used to collect the negative electrode current on the negative electrode side. The negative electrode current is used to indicate whether it is necessary to control the negative electrode protection module 203 to perform a negative electrode protection operation, and / or to indicate whether it is necessary to control the switch module 202 to perform an opening and closing switching operation.

[0097] In this optional embodiment, optionally, in actual application, the positive electrode sensing module 204 may adopt a Hall sensor; and the negative electrode sensing module 205 may adopt a shunt.

[0098] It can be seen that in this optional embodiment, positive and negative electrode sensing modules are newly added to the circuit management subcircuit, which can monitor the current separately to intelligently trigger protection operations and switch controls; further, the use of Hall sensors and shunts can improve the current monitoring accuracy of the two sensors, ensuring that the operation of the battery management subcircuit is more accurate and efficient, and further improving the safety and operational reliability of the intelligent control circuit.

[0099] In yet another optional embodiment, the positive electrode protection module 201 includes a positive fuse 2011 and a positive relay 2012, wherein:

[0100] The first end of the positive fuse 2011 is electrically connected to the positive end of the communication sub-circuit 10; the second end of the positive fuse 2011 is electrically connected to the first end of the positive relay 2012; the second end of the positive relay 2012 is electrically connected to the first end of the switch module 202;

[0101] The positive fuse 2011 is configured to perform a fusing control on the positive fuse 2011 when it is determined that the first current flowing through the positive fuse 2011 reaches a preset fusing condition of the positive fuse 2011;

[0102] The positive relay 2012 is used to switch the positive relay 2012 from a power-on state to a power-off state when it is determined that the second current flowing through the positive relay 2012 reaches a preset switching condition of the positive relay 2012.

[0103] It can be seen that in this optional embodiment, a dual current protection mechanism is realized by integrating the positive fuse and the positive relay in the positive pole protection module; specifically, the positive fuse automatically blows when the current is overloaded to protect the circuit, and the positive relay actively switches states under specific current conditions to safely cut off power, thereby effectively improving the safety and stability of the positive pole protection circuit.

[0104] In another optional embodiment, the negative electrode protection module 203 includes a negative fuse 2031 and a negative relay 2032, wherein:

[0105] The third end of the switch module 202 is electrically connected to the first end of the negative relay 2032; the second end of the negative relay 2032 is electrically connected to the first end of the negative fuse 2031; the second end of the negative fuse 2031 is electrically connected to the first end of the negative electrode sensor module 205;

[0106] The negative fuse 2031 is configured to perform a fusing control on the negative fuse 2031 when it is determined that the third current flowing through the negative fuse 2031 reaches a preset fusing condition of the negative fuse 2031;

[0107] The negative relay 2032 is configured to switch the negative relay 2032 from a power-on state to a power-off state when it is determined that the fourth current flowing through the negative relay 2032 reaches a switching condition preset by the negative relay 2032 .

[0108] It can be seen that in this optional embodiment, a dual current protection mechanism is realized by integrating the negative fuse and the negative relay in the negative pole protection module; specifically, the negative fuse automatically blows when the current is overloaded to protect the circuit, and the negative relay actively switches states under specific current conditions to safely cut off power, thereby effectively improving the safety and stability of the negative pole protection circuit.

[0109] In another optional embodiment, the communication subcircuit obtains the battery pack signal corresponding to each battery pack and transmits the battery pack signal corresponding to each battery pack to the battery management subcircuit matching the battery pack among all the battery management subcircuits, specifically including:

[0110] Obtaining battery pack signals corresponding to all battery packs connected to the communication subcircuit, and identifying each battery pack signal to obtain an identification result corresponding to each battery pack signal; the identification result corresponding to each battery pack signal includes at least battery pack identification information corresponding to the battery pack corresponding to the battery pack signal and battery pack status information, the battery pack identification information being used to determine the ownership of the battery pack signal; the battery pack status information including at least one of current information, voltage information, battery output power information, and battery temperature information;

[0111] Obtain circuit connection information corresponding to all battery management sub-circuits connected to the communication sub-circuit;

[0112] For each battery pack signal, matching the battery pack identification information corresponding to the battery pack signal with the circuit connection information corresponding to all battery management sub-circuits to obtain a battery management sub-circuit that matches the battery pack identification information corresponding to the battery pack signal among all battery management sub-circuits;

[0113] The battery pack signal is transmitted to a battery management sub-circuit having matching battery pack identification information corresponding to the battery pack signal.

[0114] In this optional embodiment, the communication subcircuit may optionally include two communication modules, wherein:

[0115] For any communication module, the first end of the positive fuse is electrically connected to the positive terminal of the communication module; the second end of the communication module is electrically connected to the second end of the negative sensor; and the third end of the communication module is used to be electrically connected to a cluster of battery packs;

[0116] a communication module configured to obtain a battery pack signal corresponding to a battery pack connected to the communication module; and identify the battery pack signal to obtain an identification result corresponding to the battery pack signal, wherein the identification result corresponding to the battery pack signal includes battery pack identification information corresponding to the battery pack corresponding to the battery pack signal and battery pack status information, wherein the battery pack identification information is used to determine the ownership of the battery pack signal; and the battery pack status information includes at least one of current information, voltage information, battery output power information, and battery temperature information;

[0117] The communication module is further configured to determine the battery management sub-circuit connected to the communication module, and transmit a battery pack signal corresponding to a cluster of battery packs connected to the communication module to the battery management sub-circuit connected to the communication module.

[0118] In this alternative embodiment, see Figure 4 , Figure 4 This is a schematic diagram of the structure of the external panel of a high-voltage box disclosed in the embodiment of this application. Figure 4 As shown, in the intelligent control circuit corresponding to a single high-voltage box, the two integrated battery management sub-circuits can communicate with two clusters of battery packs at the same time. Correspondingly, in the specific structure, a low-voltage communication interface (corresponding to the communication sub-circuit) can be set on the outer shell panel of the high-voltage box. The low-voltage communication interface contains the communication signals of the two clusters of battery packs and can communicate with the two clusters of battery packs simultaneously. At the same time, the two communication signals are independent of each other and do not interfere with each other.

[0119] In this alternative embodiment, Figure 4 Some of the buttons on the external panel of the high-voltage box shown correspond to the functions of the communication sub-circuit, specifically, Figure 4 The B1+ / B1- are used to access the total positive and negative terminals of a battery pack. B1+ corresponds to the positive terminal of the communication sub-circuit, and B1- corresponds to the negative terminal of the communication sub-circuit. Figure 4 SB1 is a push button switch used to control the auxiliary power supply; Figure 4 P1+ / P1- is used to connect to the positive and negative poles of the combiner cabinet to achieve parallel return of a single high-voltage box and other high-voltage boxes; as for B2+ / B2- and P2+ / P2-, their related functions are the same as those of B1+ / B1- and P1+ / P1-. The difference is that the two are connected to different battery packs and different battery management sub-circuits.

[0120] In this alternative embodiment, Figure 4 J1 is used to connect to the 220VAC auxiliary power supply; Figure 4 J2 and J3 correspond to the display and control communication function of the high-voltage box and the inter-box communication function respectively; Figure 4 J5 is used as a communication debugging port or a slave communication interface; Figure 4QS1 / QS2 are two main switches corresponding to the above-mentioned switch modules, wherein one battery management sub-circuit corresponds to one switch module; QS1 and QS2 are responsible for managing the opening or closing of the battery management sub-circuit connected to the switch module.

[0121] It can be seen that in this optional embodiment, by setting up a subdivided communication module, one-to-one signal interaction control is achieved between the battery pack, the communication module, and the battery management subcircuit. When multiple (preferably 2) battery management subcircuits are integrated in the same high-voltage box, accurate and stable signal interaction can be achieved between multiple battery packs and a single high-voltage box. While improving the stability and safety of the overall control circuit, it can also greatly reduce the wiring complexity between the high-voltage box and the external battery pack, as well as the wiring complexity of the convergence between the high-voltage boxes.

[0122] Example 2

[0123] See also Figure 3 , Figure 3 This is a flow chart of an intelligent control method for a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application. Figure 3 The intelligent control circuit of the two-in-one high-voltage box of the energy storage system described can be applied to the intelligent control circuit of the two-in-one high-voltage box of the energy storage system, and the embodiments of the present application are not limited thereto. In addition, the intelligent control circuit includes a communication subcircuit and multiple battery management subcircuits, wherein: the first end of each battery management subcircuit is electrically connected to the first communication end of the communication subcircuit; the second communication end of the communication subcircuit is used to electrically connect to two battery packs respectively. Figure 3 As shown, the intelligent control method of the two-in-one high-voltage box of the energy storage system may include the following operations:

[0124] 301. The communication sub-circuit obtains a battery pack signal corresponding to each battery pack, and transmits the battery pack signal corresponding to each battery pack to a battery management sub-circuit matching the battery pack among all battery management sub-circuits.

[0125] 302. After receiving a battery pack signal that matches the battery management sub-circuit and is transmitted by the communication sub-circuit, the battery management sub-circuit performs a battery management and control operation on a battery corresponding to the battery pack signal according to the battery pack signal.

[0126] In an embodiment of the present application, the battery management and control operation includes at least one operation of an overload protection operation, an overcurrent protection operation, an overvoltage protection operation, an overtemperature protection operation, a short circuit protection operation, and a power-on and power-off switching operation.

[0127] It can be seen that implementation Figure 3The described intelligent control method of the two-in-one high-voltage box of the energy storage system realizes the intelligent management and protection of multiple battery packs by one high-voltage box through the coordinated work of the communication sub-circuit and multiple battery management sub-circuits; specifically, the intelligent control circuit can obtain and transmit the battery pack signal to the matching battery management sub-circuit in real time, and then perform multiple battery management operations including overload, overcurrent, overvoltage, overtemperature, short-circuit protection and power switching, thereby effectively improving the safety of the use of the intelligent control circuit; among them, unlike the traditional high-voltage box that only integrates one battery management sub-circuit, the present application can integrate multiple battery management sub-circuits in one high-voltage box, structurally realize the reasonable configuration of multiple battery management sub-circuits, reduce the installation space of the high-voltage box, improve the utilization rate of the space inside the high-voltage box, and reduce the wiring complexity between the high-voltage box and the battery pack.

[0128] Example 3

[0129] See also Figure 4 , Figure 4 This is a flow chart of another intelligent control method for a two-in-one high-voltage box of an energy storage system disclosed in an embodiment of the present application. Figure 4 The described intelligent control method of the two-in-one high-voltage box of the energy storage system can be applied to the intelligent control circuit of the two-in-one high-voltage box of the energy storage system, and the embodiments of the present application are not limited thereto. In addition, the battery management subcircuit includes a positive electrode protection module, a switch module, and a negative electrode protection module, wherein: the first end of the positive electrode protection module is electrically connected to the positive end of the communication subcircuit; the second end of the positive electrode protection module is electrically connected to the first end of the switch module; the second end of the switch module is used to connect to the junction cabinet; the third end of the switch module is electrically connected to the first end of the negative electrode protection module; the second end of the negative electrode protection module is electrically connected to the negative end of the communication subcircuit. Figure 4 As shown, the intelligent control method of the two-in-one high-voltage box of the energy storage system may include the following operations:

[0130] 401. The communication sub-circuit obtains a battery pack signal corresponding to each battery pack, and transmits the battery pack signal corresponding to each battery pack to a battery management sub-circuit matching the battery pack among all battery management sub-circuits.

[0131] 402. After receiving a battery pack signal that matches the battery management subcircuit and is transmitted by the communication subcircuit, the positive electrode protection module determines a first circuit state corresponding to the positive electrode side of the battery management subcircuit according to the battery pack signal.

[0132] 403. Execute a preset positive electrode protection operation according to the first circuit state, where the positive electrode protection operation includes a short circuit protection operation on the positive electrode side and / or a power-on / power-off switching operation.

[0133] 404. The switch module performs an opening and closing switching operation on the battery management sub-circuit.

[0134] 405 : The negative electrode protection module determines a second circuit state corresponding to the negative electrode side in the battery management subcircuit according to the battery pack signal.

[0135] 406. Execute a preset negative electrode protection operation according to the second circuit state, where the negative electrode protection operation includes a short circuit protection operation on the negative electrode side and / or a power-on / power-off switching operation.

[0136] In the embodiment of the present application, for other descriptions of step 401, please refer to the other specific descriptions of step 301 in embodiment 2, which will not be repeated in the embodiment of the present application.

[0137] It can be seen that implementation Figure 4 The described intelligent control method for a two-in-one high-voltage box of an energy storage system has a battery management subcircuit that integrates positive electrode protection, switch control, and negative electrode protection functions. Specifically, the battery pack signal is received through the communication subcircuit, and the positive electrode protection module and the negative electrode protection module receive the battery pack signal, and intelligently judge the circuit status based on the battery pack signal, and then perform corresponding preset operations such as short-circuit protection and power-on and power-off switching, thereby realizing fine management of the battery pack, which is beneficial to enhancing the safety, reliability, and control flexibility of the intelligent control circuit.

[0138] In an optional embodiment, the battery management subcircuit also includes a positive electrode sensor module and a negative electrode sensor module, wherein: the second end of the switch module is electrically connected to the first end of the positive electrode sensor module; the second end of the positive electrode sensor module is used to connect to the junction cabinet; the second end of the negative electrode protection module is electrically connected to the first end of the negative electrode sensor module; and the second end of the negative electrode sensor module is electrically connected to the negative end of the communication subcircuit.

[0139] Furthermore, the above-mentioned method in which the battery management subcircuit performs the battery management and control operation on the battery corresponding to the battery pack signal according to the battery pack signal after receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit specifically includes:

[0140] The positive current on the positive side is collected by the positive sensing module. The positive current is used to indicate whether it is necessary to control the positive protection module to perform a positive protection operation and / or to indicate whether it is necessary to control the switch module to perform an opening and closing switching operation.

[0141] The negative current on the negative side is collected by the negative sensing module. The negative current is used to indicate whether it is necessary to control the negative protection module to perform a negative protection operation, and / or to indicate whether it is necessary to control the switch module to perform an opening and closing switching operation.

[0142] In this optional embodiment, optionally, in actual application, the positive electrode sensing module may adopt a Hall sensor; and the negative electrode sensing module may adopt a shunt.

[0143] It can be seen that in this optional embodiment, positive and negative electrode sensing modules are newly added to the circuit management subcircuit, which can monitor the current separately to intelligently trigger protection operations and switch controls; further, the use of Hall sensors and shunts can improve the current monitoring accuracy of the two sensors, ensuring that the operation of the battery management subcircuit is more accurate and efficient, and further improving the safety and operational reliability of the intelligent control circuit.

[0144] In another optional embodiment, the positive electrode protection module includes a positive fuse and a positive relay, wherein: a first end of the positive fuse is electrically connected to the positive end of the communication subcircuit; a second end of the positive fuse is electrically connected to the first end of the positive relay; and a second end of the positive relay is electrically connected to the first end of the switch module;

[0145] The above-mentioned method of performing the preset positive electrode protection operation by the positive electrode protection module according to the first circuit state specifically includes:

[0146] When the positive fuse determines that the first current flowing through the positive fuse reaches a preset fusing condition of the positive fuse, the positive fuse is subjected to fusing control;

[0147] When the positive relay determines that the second current flowing through the positive relay reaches a preset switching condition of the positive relay, the positive relay is switched from the power-on state to the power-off state.

[0148] It can be seen that in this optional embodiment, a dual current protection mechanism is realized by integrating the positive fuse and the positive relay in the positive pole protection module; specifically, the positive fuse automatically blows when the current is overloaded to protect the circuit, and the positive relay actively switches states under specific current conditions to safely cut off power, thereby effectively improving the safety and stability of the positive pole protection circuit.

[0149] In another optional embodiment, the negative electrode protection module includes a negative fuse and a negative relay, wherein: the third end of the switch module is electrically connected to the first end of the negative relay; the second end of the negative relay is electrically connected to the first end of the negative fuse; and the second end of the negative fuse is electrically connected to the first end of the negative electrode sensor module.

[0150] The above-mentioned method of performing the preset negative electrode protection operation by the negative electrode protection module according to the second circuit state specifically includes:

[0151] When the negative fuse determines that the third current flowing through the negative fuse reaches a preset fusing condition of the negative fuse, the negative fuse performs fusing control on the negative fuse;

[0152] When the negative relay determines that the fourth current flowing through the negative relay reaches a preset switching condition of the negative relay, the negative relay is switched from the power-on state to the power-off state.

[0153] It can be seen that in this optional embodiment, a dual current protection mechanism is realized by integrating the negative fuse and the negative relay in the negative pole protection module; specifically, the negative fuse automatically blows when the current is overloaded to protect the circuit, and the negative relay actively switches states under specific current conditions to safely cut off power, thereby effectively improving the safety and stability of the negative pole protection circuit.

[0154] Example 4

[0155] See also Figure 7 , Figure 7 A high-voltage box is disclosed in an embodiment of the present application, comprising a high-voltage box body, and the high-voltage box comprises an intelligent control circuit of a two-in-one high-voltage box of an energy storage system as disclosed in embodiment 1 of the present application; and the high-voltage box is used to execute the steps of the intelligent control method of the two-in-one high-voltage box of an energy storage system described in embodiment 2 or embodiment 3 of the present application.

[0156] The device embodiments described above are merely illustrative. Modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0157] Through the detailed description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by means of hardware. Based on this understanding, the above technical solution, in essence, or the portion that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a computer storage medium, including a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0158] Finally, it should be noted that the intelligent control circuit and method of a two-in-one high-voltage box for an energy storage system, and the high-voltage box disclosed in the embodiments of the present application are only preferred embodiments of the present application and are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. An intelligent control circuit for a two-in-one high-voltage box of an energy storage system, characterized in that: The intelligent control circuit includes a communication subcircuit and multiple battery management subcircuits, wherein: The first end of each of the battery management subcircuits is electrically connected to the first communication end of the communication subcircuit; the second communication end of the communication subcircuit is used to electrically connect to two battery packs respectively; The communication subcircuit is used to obtain a battery pack signal corresponding to each of the battery packs, and transmit the battery pack signal corresponding to each of the battery packs to the battery management subcircuit that matches the battery pack among all the battery management subcircuits; The battery management subcircuit is used to perform a battery management operation on the battery corresponding to the battery pack signal according to the battery pack signal after receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit. The battery management operation includes at least one operation of an overload protection operation, an overcurrent protection operation, an overvoltage protection operation, an overtemperature protection operation, a short-circuit protection operation, and a power-on and power-off switching operation.

2. The intelligent control circuit of the two-in-one high-voltage box of the energy storage system according to claim 1 is characterized in that: The battery management subcircuit includes a positive electrode protection module, a switch module, and a negative electrode protection module, wherein: The first end of the positive electrode protection module is electrically connected to the positive end of the communication sub-circuit; the second end of the positive electrode protection module is electrically connected to the first end of the switch module; the second end of the switch module is used to connect to the combiner cabinet; the third end of the switch module is electrically connected to the first end of the negative electrode protection module; the second end of the negative electrode protection module is electrically connected to the negative end of the communication sub-circuit; The positive electrode protection module is configured to, after receiving a battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, determine a first circuit state corresponding to the positive electrode side of the battery management subcircuit based on the battery pack signal, and perform a preset positive electrode protection operation based on the first circuit state, the positive electrode protection operation including a short-circuit protection operation for the positive electrode side and / or a power-on / power-off switching operation; The switch module is used to perform opening and closing switching operations on the battery management sub-circuit; The negative electrode protection module is used to determine the second circuit state corresponding to the negative electrode side in the battery management subcircuit according to the battery pack signal, and perform a preset negative electrode protection operation according to the second circuit state. The negative electrode protection operation includes a short-circuit protection operation for the negative electrode side, and / or a power-on and power-off switching operation.

3. The intelligent control circuit of the two-in-one high-voltage box of the energy storage system according to claim 2 is characterized in that: The battery management subcircuit further includes a positive electrode sensing module and a negative electrode sensing module, wherein: The second end of the switch module is electrically connected to the first end of the positive sensor module; the second end of the positive sensor module is used to connect to the combiner cabinet; The second end of the negative electrode protection module is electrically connected to the first end of the negative electrode sensor module; the second end of the negative electrode sensor module is electrically connected to the negative end of the communication sub-circuit.

4. The intelligent control circuit of the two-in-one high-voltage box of the energy storage system according to claim 3 is characterized in that: The positive electrode sensing module is used to collect the positive electrode current on the positive electrode side, and the positive electrode current is used to indicate whether it is necessary to control the positive electrode protection module to perform the positive electrode protection operation, and / or to indicate whether it is necessary to control the switch module to perform the opening and closing switching operation; The negative electrode sensing module is used to collect the negative electrode current on the negative electrode side. The negative electrode current is used to indicate whether it is necessary to control the negative electrode protection module to perform the negative electrode protection operation, and / or to indicate whether it is necessary to control the switch module to perform the opening and closing switching operation.

5. The intelligent control circuit of the two-in-one high-voltage box of the energy storage system according to claim 2, 3 or 4, characterized in that: The positive electrode protection module includes a positive fuse and a positive relay, wherein: The first end of the positive fuse is electrically connected to the positive end of the communication sub-circuit; the second end of the positive fuse is electrically connected to the first end of the positive relay; the second end of the positive relay is electrically connected to the first end of the switch module; The positive fuse is configured to perform fusing control on the positive fuse when it is determined that the first current flowing through the positive fuse reaches a preset fusing condition of the positive fuse; The positive relay is used to switch the positive relay from a power-on state to a power-off state when it is determined that the second current flowing through the positive relay reaches a preset switching condition of the positive relay.

6. The intelligent control circuit of the two-in-one high-voltage box of the energy storage system according to claim 2, 3 or 4, characterized in that: The negative electrode protection module includes a negative fuse and a negative relay, wherein: The third end of the switch module is electrically connected to the first end of the negative relay; the second end of the negative relay is electrically connected to the first end of the negative fuse; the second end of the negative fuse is electrically connected to the first end of the negative electrode sensor module; The negative fuse is configured to perform fusing control on the negative fuse when it is determined that the third current flowing through the negative fuse reaches a preset fusing condition of the negative fuse; The negative relay is used to switch the negative relay from a power-on state to a power-off state when it is determined that the fourth current flowing through the negative relay reaches a preset switching condition of the negative relay.

7. The intelligent control circuit of the two-in-one high-voltage box of the energy storage system according to claim 3 or 4, characterized in that: The positive electrode sensing module is a Hall sensor; the negative electrode sensing module is a shunt.

8. An intelligent control method for a two-in-one high-voltage box of an energy storage system, characterized in that: The method is applied to an intelligent control circuit of a two-in-one high-voltage box of an energy storage system, wherein the intelligent control circuit includes a communication subcircuit and multiple battery management subcircuits, wherein: a first end of each battery management subcircuit is electrically connected to a first communication end of the communication subcircuit; and a second communication end of the communication subcircuit is used to electrically connect to two battery packs respectively; The method comprises: The communication subcircuit obtains a battery pack signal corresponding to each battery pack, and transmits the battery pack signal corresponding to each battery pack to a battery management subcircuit matching the battery pack among all the battery management subcircuits; After receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the battery management subcircuit performs a battery management operation on the battery corresponding to the battery pack signal according to the battery pack signal. The battery management operation includes at least one of an overload protection operation, an overcurrent protection operation, an overvoltage protection operation, an overtemperature protection operation, a short-circuit protection operation, and a power-on / off switching operation.

9. The intelligent control method for a two-in-one high-voltage box of an energy storage system according to claim 8, characterized in that: The battery management subcircuit includes a positive electrode protection module, a switch module, and a negative electrode protection module, wherein: the first end of the positive electrode protection module is electrically connected to the positive end of the communication subcircuit; the second end of the positive electrode protection module is electrically connected to the first end of the switch module; the second end of the switch module is used to connect to the combiner cabinet; the third end of the switch module is electrically connected to the first end of the negative electrode protection module; the second end of the negative electrode protection module is electrically connected to the negative end of the communication subcircuit; After receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the battery management subcircuit performs a battery management and control operation on the battery corresponding to the battery pack signal according to the battery pack signal, including: After receiving the battery pack signal transmitted by the communication subcircuit and matching the battery management subcircuit, the positive electrode protection module determines a first circuit state corresponding to the positive electrode side of the battery management subcircuit according to the battery pack signal, and performs a preset positive electrode protection operation according to the first circuit state, wherein the positive electrode protection operation includes a short-circuit protection operation for the positive electrode side and / or a power-on / power-off switching operation; The switch module performs opening and closing switching operations on the battery management sub-circuit; The negative electrode protection module determines the second circuit state corresponding to the negative electrode side in the battery management subcircuit according to the battery pack signal, and performs a preset negative electrode protection operation according to the second circuit state. The negative electrode protection operation includes a short-circuit protection operation for the negative electrode side, and / or a power-on and power-off switching operation.

10. A high-voltage box, characterized in that: The high-voltage box includes a high-voltage box body, and the high-voltage box also includes an intelligent control circuit of a two-in-one high-voltage box of an energy storage system as described in any one of claims 1 to 7, and the high-voltage box is used to execute the intelligent control method of the two-in-one high-voltage box of an energy storage system as described in claim 8 or 9.

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