High-voltage box, battery cluster and energy storage system

Abstract

The embodiment of the utility model discloses a high-voltage box, a battery cluster and an energy storage system. The high-voltage box comprises a first interface, a second interface, a third interface, a fourth interface, a first fuse and a main control module; one end of the first interface is electrically connected with one end of the battery pack; one end of the second interface is electrically connected with the other end of the battery pack; one end of the first fuse is electrically connected with the other end of the first interface to form a first node; the first fuse is electrically connected with the other end of the first fuse; electrically connecting the other end of the second interface to form a second node; the main control module comprises a voltage acquisition module, one end of the voltage acquisition module is electrically connected with the first node, and the other end of the voltage acquisition module is electrically connected with the second node, so that the problem of inaccurate high-voltage acquisition after the main positive fuse in the high-voltage box is aged can be avoided, and meanwhile, maintenance and troubleshooting of field operation and maintenance personnel are facilitated; and the reliability of the high-voltage box is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a high-voltage box, a battery cluster, and an energy storage system. Background Art

[0002] A high-voltage box is a device used in power systems. Its primary function is to integrate and control various high-voltage components to ensure safe system operation. High-voltage boxes play a vital role in modern power systems, providing not only power management and protection but also high flexibility and adaptability in specific applications.

[0003] In energy storage systems, the high-voltage box serves as the intermediate unit connecting the battery cluster and the converter, performing functions such as voltage and current acquisition, contactor control, and protection. It also supports single-cell voltage and temperature acquisition, balancing management, and alarm functions. However, the high-voltage box still suffers from poor voltage acquisition accuracy when performing high-voltage data acquisition. Utility Model Content

[0004] In response to the deficiencies in the prior art, the present application provides a high-voltage box, a battery cluster, and an energy storage system, aiming to solve the technical problem of poor accuracy in high-voltage collection by the high-voltage box in the prior art.

[0005] To solve the above problems, the present application provides a high-voltage box, which includes:

[0006] A first interface, one end of the first interface is electrically connected to one end of the battery pack;

[0007] a second interface, one end of the second interface being electrically connected to the other end of the battery pack;

[0008] a first fuse, one end of the first fuse being electrically connected to the other end of the first interface to form a first node;

[0009] a third interface, electrically connected to the other end of the first fuse;

[0010] a fourth interface electrically connected to the other end of the second interface to form a second node;

[0011] The main control module includes a voltage acquisition module, one end of the voltage acquisition module is electrically connected to the first node, and the other end of the voltage acquisition module is electrically connected to the second node.

[0012] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a second fuse;

[0013] One end of the second fuse is electrically connected to the other end of the second interface to form a second node; the other end of the second fuse is electrically connected to the fourth interface.

[0014] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a Hall sensor;

[0015] One end of the Hall sensor is electrically connected to the other end of the first interface; the other end of the Hall sensor is electrically connected to one end of the first fuse to form a first node.

[0016] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a diverter;

[0017] One end of the shunt is electrically connected to the other end of the second interface to form a second node; the other end of the shunt is electrically connected to one end of the second fuse.

[0018] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a first relay and a second relay;

[0019] Among them, one end of the first relay is electrically connected to the other end of the first fuse, and the other end of the first relay is electrically connected to the third interface; one end of the second relay is electrically connected to the other end of the second interface, and the other end of the second relay is electrically connected to the fourth interface.

[0020] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a pre-charging circuit;

[0021] One end of the pre-charging circuit is electrically connected to one end of the first relay and the other end of the first fuse; the other end of the pre-charging circuit is electrically connected to the other end of the first relay and the third interface.

[0022] Furthermore, in the high-voltage box provided in the present application, the pre-charging circuit includes a pre-charging relay and a pre-charging resistor;

[0023] Among them, one end of the pre-charging relay is electrically connected to the other end of the pre-charging resistor, and the other end of the pre-charging relay is electrically connected to the third interface and the other end of the first relay; the other end of the pre-charging resistor is electrically connected to one end of the first relay and the other end of the first fuse.

[0024] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes an isolating switch;

[0025] The first end of the isolating switch is electrically connected to the other end of the first relay, the second end of the isolating switch is electrically connected to the other end of the second relay, the third end of the isolating switch is electrically connected to the third interface, and the fourth end of the isolating switch is electrically connected to the fourth interface.

[0026] In a second aspect, the present application further provides a battery cluster comprising at least one battery pack and the high-voltage box provided in the first aspect.

[0027] In a third aspect, the present application further provides an energy storage system, which includes a combiner cabinet and at least one battery cluster provided in the second aspect;

[0028] Among them, one end of the third interface is electrically connected to the other end of the first fuse, one end of the fourth interface is electrically connected to the other end of the second interface, and the other end of the third interface and the other end of the fourth interface are both electrically connected to the junction box.

[0029] The high-voltage box provided in the present application includes a first interface, a second interface, a third interface, a fourth interface, a first fuse and a main control module, one end of the first interface is electrically connected to one end of the battery pack; one end of the second interface is electrically connected to the other end of the battery pack; one end of the first fuse is electrically connected to the other end of the first interface to form a first node; the other end of the first fuse is electrically connected; the other end of the second interface is electrically connected to form a second node; the main control module includes a voltage acquisition module, one end of the voltage acquisition module is electrically connected to the first node, and the other end of the voltage acquisition module is electrically connected to the second node, thereby avoiding the problem of inaccurate high-voltage acquisition after aging of the main positive fuse in the high-voltage box, and at the same time ensuring that the energy storage system can accurately perform high-voltage acquisition whether under normal operating conditions or under fault conditions, which is beneficial to the inspection and troubleshooting of on-site operation and maintenance personnel, and greatly improves the reliability of the high-voltage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are 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.

[0031] Figure 1 A schematic block diagram of a battery cluster provided by the prior art;

[0032] Figure 2 Equivalent circuit diagram for voltage acquisition provided in this application;

[0033] Figure 3 Another equivalent circuit diagram for voltage acquisition provided by this application;

[0034] Figure 4 A schematic block diagram of a battery cluster provided in an embodiment of the present application;

[0035] Figure 5 A schematic block diagram of an energy storage system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0038] It should also be understood that the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0039] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0040] In addition, in this application, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" appearing in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements, or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood based on the specific implementation.

[0041] like Figure 1As shown, in the electrical design of the high-voltage box 110 of the energy storage system, a main control board (SBMU) is installed within the box 110. The SBMU is electrically connected to the first port B+ and the second port B- of the box 110 to collect high voltage from the battery cluster 100 where the box 110 is located. Two voltage collection lines are arranged on the copper busbars of the first port B+ and the second port B-, respectively. One voltage collection line serves as the power supply ground for voltage collection and is typically located near the second port B- of the box 110. The other voltage collection line, while not theoretically proven, is typically placed between the main positive relay and the main positive fuse. Under normal operation, the main positive fuse has a very low internal resistance, typically in the milliohm range, which is a very small percentage compared to the line resistance and the internal resistance of the series-connected battery pack. Therefore, in the series circuit formed by the total voltage collection, the total voltage collected by the SBMU is essentially the total battery voltage.

[0042] However, as the main positive fuse ages and its resistance increases, or in extreme cases, the main positive fuse blows due to overload or short-circuit current in the circuit, its resistance after blowing can reach the megaohm level; at this time, the voltage shared by the main positive fuse in the series circuit of the high-voltage collection of the main control board SBMU needs to be considered. This can be calculated, such as Figure 2 As shown in the figure, the voltage of the series-connected batteries collected by the main control board SBMU is significantly smaller than the actual value and is not the actual voltage of the series-connected batteries.

[0043] According to the voltage acquisition principle, the equivalent circuit of voltage acquisition is as follows: Figure 3 As shown, the resistance of the main positive fuse in the case of aging or abnormal melting can be represented by resistor R2. Then the high-voltage collected voltage value V = R3 / (R3+R2)*U. If R2 = 6 MΩ and R3 = 5.11 MΩ, then V = 5.11 / (5.11+6)*U = 0.46U. It can be seen that the collected voltage value V is significantly different from the actual battery voltage U.

[0044] To this end, the present application provides a battery cluster 100, which, by locating the voltage collection point at the main positive fuse between the main positive fuse and the first interface B+, can avoid the problem of inaccurate high-voltage collection after the main positive fuse in the high-voltage box 110 ages. At the same time, it can ensure that the energy storage system can accurately collect high voltage under normal operating conditions or fault conditions, which is beneficial to on-site operation and maintenance personnel's inspection and troubleshooting, and greatly improves the reliability of the high-voltage box 110.

[0045] See also Figure 4 , Figure 4 This is a schematic block diagram of a battery cluster 100 provided in an embodiment of the present application. Figure 4 As shown, the present application provides a high-voltage box 110, which includes:

[0046] A first interface B+, one end of which is electrically connected to one end of the battery pack 120;

[0047] A second interface B-, one end of the second interface B- is electrically connected to the other end of the battery pack 120;

[0048] A first fuse FU1, one end of the first fuse FU1 is electrically connected to the other end of the first interface B+ to form a first node M;

[0049] The third interface P+ is electrically connected to the other end of the first fuse FU1;

[0050] The fourth interface P- is electrically connected to the other end of the second interface B- to form a second node N;

[0051] The main control module includes a voltage acquisition module, one end of the voltage acquisition module is electrically connected to the first node M, and the other end of the voltage acquisition module is electrically connected to the second node N.

[0052] In this embodiment, the high-voltage box 110 is provided with four interfaces: a first interface B+, a second interface B-, a third interface P+, ​​and a fourth interface P-. The first interface B+ and the second interface B- are used to electrically connect to the battery pack 120 of the battery cluster 100 to enable charging and discharging of the battery pack 120. The third interface P+ and the fourth interface P- are used to electrically connect to a target device, which can be a combiner cabinet 200 or an energy storage converter.

[0053] At the same time, a first fuse FU1, i.e., a main positive fuse, is provided between the first interface B+ and the third interface P+. A main control module of the battery management system, i.e., a main control board SBMU, is provided in the high-voltage box 110. The main control module is provided with a voltage acquisition module, which is used to collect high voltage from the battery cluster 100. The voltage acquisition module is provided with two voltage acquisition lines, one voltage acquisition line is provided between the first fuse FU1 and the first interface B+, i.e., electrically connected to the first node M, and the other voltage acquisition line is provided between the second interface B- and the fourth interface P-, i.e., electrically connected to the second node N. This can avoid the problem of inaccurate high-voltage acquisition after aging of the main positive fuse in the high-voltage box 110, and can ensure that the energy storage system can accurately collect high voltage under normal operating conditions or fault conditions, which is beneficial to on-site operation and maintenance personnel. Troubleshooting and greatly improve the reliability of the high-voltage box 110.

[0054] The high-voltage box 110 provided in the present application includes a first interface B+, a second interface B-, a third interface P+, ​​a fourth interface P-, a first fuse FU1 and a main control module, one end of the first interface B+ is electrically connected to one end of the battery pack 120; one end of the second interface B- is electrically connected to the other end of the battery pack 120; one end of the first fuse FU1 is electrically connected to the other end of the first interface B+ to form a first node M; the other end of the first fuse FU1 is electrically connected; the other end of the second interface B- is electrically connected to form a second node N; the main control module includes a voltage acquisition module, one end of the voltage acquisition module is electrically connected to the first node M, and the other end of the voltage acquisition module is electrically connected to the second node N, thereby avoiding the problem of inaccurate high-voltage acquisition after aging of the main positive fuse in the high-voltage box 110, and at the same time ensuring that the energy storage system can accurately perform high-voltage acquisition whether under normal operating conditions or under fault conditions, which is beneficial to the inspection and troubleshooting of on-site operation and maintenance personnel, and greatly improves the reliability of the high-voltage box 110.

[0055] In some embodiments, as Figure 4 As shown, the high-voltage box 110 further includes a second fuse FU2; wherein, one end of the second fuse FU2 is electrically connected to the other end of the second interface B- to form a second node N; the other end of the second fuse FU2 is electrically connected to the fourth interface P-.

[0056] In this embodiment, the second fuse FU2 is the main negative fuse in the high-voltage box 110. The main negative fuse is electrically connected to the second interface B- and forms a second node N, which can also avoid the problem of inaccurate high-voltage collection after aging of the main negative fuse.

[0057] In some embodiments, as Figure 4 As shown, the high-voltage box 110 further includes a Hall sensor Hall; wherein one end of the Hall sensor Hall is electrically connected to the other end of the first interface B+; the other end of the Hall sensor Hall is electrically connected to one end of the first fuse FU1 to form a first node M.

[0058] A Hall sensor is a magnetic field sensor based on the Hall effect and is widely used in industrial automation, automotive electronics, computers, and information technology. Its operating principle is that when current passes through a thin sheet of semiconductor material, a potential difference is generated in the direction perpendicular to the current and magnetic field. This phenomenon is called the Hall effect. Depending on the application requirements, Hall sensors can be divided into various types, including linear Hall sensors, switch-type Hall sensors, and magnetoresistive Hall sensors. Linear Hall sensors output an analog voltage or current signal proportional to the magnetic field intensity and are suitable for applications that require continuous measurement of magnetic field changes. Switch-type Hall sensors, on the other hand, detect specific magnetic field thresholds and initiate a switch action when these thresholds are reached.

[0059] In this embodiment, the first node M is located between the Hall sensor Hall and the first fuse FU1. Since the Hall sensor Hall has no direct electrical connection to the high-voltage copper busbar, its aging or component failure does not affect the high-voltage acquisition function of the main control board SBMU. Therefore, whether the first node M is located on the left or right side of the Hall sensor Hall, it has no effect on the high-voltage acquisition function of the voltage acquisition module.

[0060] In some embodiments, as Figure 4 As shown, the high-voltage box 110 further includes a shunt RW; wherein, one end of the shunt RW is electrically connected to the other end of the second interface B- to form a second node N; the other end of the shunt RW is electrically connected to one end of the second fuse FU2.

[0061] In this embodiment, in order to accurately collect the voltage of the battery in the battery cluster 100, the second node N needs to be provided between the shunt RW and the second interface B-. Among them, the shunt RW is an electronic device for current measurement and control. Its main function is to generate a low-resistance path through a low-resistance resistor, thereby directing part of the current to another point in the circuit, so that the shunt RW can expand the measurement range of the ammeter, and is often used in large current detection applications, such as overcurrent protection, 4-20mA systems and battery charging. The working principle of the shunt RW is based on the principle that a voltage is generated across a resistor when a DC current passes through a resistor. When current flows through the shunt RW, a certain voltage drop will be generated across it. By measuring this voltage drop, the total current flowing through the entire circuit can be indirectly measured. For example, in a power battery PACK, the shunt RW is used to detect the current value flowing through, which is usually monitored by converting it into a voltage.

[0062] Shunts RW come in a variety of types and sizes. Common ones include manganese-nickel-copper alloy resistor rods and copper strips with a nickel coating. Their rated voltage drop is generally 60mV, but they can also be manufactured in various sizes, such as 75mV, 100mV, 120mV, 150mV, and 300mV, depending on the application. Shunts RW also come in two types: internal and external. Internal shunts are typically used in small devices, while external shunts are suitable for handling higher currents.

[0063] In some embodiments, as Figure 4 As shown, the high-voltage box 110 also includes a first relay KA1 and a second relay KA2; wherein, one end of the first relay KA1 is electrically connected to the other end of the first fuse FU1, and the other end of the first relay KA1 is electrically connected to the third interface P+; one end of the second relay KA2 is electrically connected to the other end of the second interface B-, and the other end of the second relay KA2 is electrically connected to the fourth interface P-.

[0064] In this embodiment, the first relay KA1 is the main positive relay within the high-voltage box 110, and the second relay KA2 is the main negative relay within the high-voltage box 110. The main positive and negative relays within the high-voltage box 110 play a crucial role in the battery system. They can be controlled by the vehicle controller through the battery management system (BMS) to control the on / off state of the main circuit. For example, during charging, the BMS activates the pre-charge relay KA3, which then activates the main positive relay and disconnects the pre-charge relay KA3.

[0065] The main positive relay is primarily used to control the on / off switching of circuits, converting low-voltage signals into high-voltage signals to control the on / off switching of high-power electrical equipment. The main positive relay operates by utilizing electromagnetic attraction. When the control circuit is energized, the coil of the main positive relay generates a magnetic field, attracting and activating the mechanical structure, thereby achieving switching. The main positive relay also provides circuit protection, playing an important protective role within the circuit. The main negative relay is primarily responsible for overload protection. When the current in the circuit exceeds the set rated value, the main negative relay automatically disconnects the circuit to prevent excessive current from causing equipment damage or fire. It measures the current to determine whether the rated value has been exceeded and promptly disconnects the circuit. Therefore, the main positive relay and main negative relay within the high-voltage box 110 are responsible for circuit switching control and overload protection, respectively, ensuring the safe operation of the battery system.

[0066] In some embodiments, as Figure 4 As shown, the high-voltage box 110 also includes a pre-charging circuit; wherein, one end of the pre-charging circuit is electrically connected to one end of the first relay KA1 and the other end of the first fuse FU1; the other end of the pre-charging circuit is electrically connected to the other end of the first relay KA1 and the third interface P+.

[0067] In this embodiment, the pre-charge circuit primarily protects the battery and other electrical components by controlling the flow of current. Specifically, the pre-charge circuit can limit the charging current, prevent surges, reduce sparking and arcing, protect the motor controller and main relay, and control the voltage rise rate.

[0068] Specifically, within the high-voltage box 110, a pre-charge resistor is connected between the battery's positive terminal and the battery's positive relay, forming a series circuit. When the energy storage system is turned on, the battery voltage begins to rise. At this time, the high resistance of the resistor limits the flow of current, thereby slowing the voltage rise.

[0069] The pre-charge circuit controls the slope of the charging current, allowing the battery to absorb energy slowly during the initial charging phase, thus avoiding surges. This helps protect the battery's internal structure, prolongs battery life, and improves the stability of the entire charging system. The pre-charge process also charges the motor controller's pre-charge capacitor, reducing sparking and arcing when the high-voltage relay closes, preventing high-voltage surges that could damage high-voltage components and improving high-voltage system safety. Furthermore, the pre-charge circuit reduces the inrush current during power-up, protecting key components such as the motor controller, battery, and main relay.

[0070] In some embodiments, as Figure 4 As shown, the pre-charging circuit includes a pre-charging relay KA3 and a pre-charging resistor R1; wherein, one end of the pre-charging relay KA3 is electrically connected to the other end of the pre-charging resistor R1, and the other end of the pre-charging relay KA3 is electrically connected to the third interface P+ and the other end of the first relay KA1; the other end of the pre-charging resistor R1 is electrically connected to one end of the first relay KA1 and the other end of the first fuse FU1.

[0071] Specifically, pre-charge resistor R1 is a high-resistance element that controls the rate of voltage rise in the system by limiting the flow of current. In the energy storage high-voltage box 110, pre-charge resistor R1 functions to limit the charging current during the pre-charge phase, preventing arcing or overcurrent caused by excessive current, thereby protecting the safe operation of the battery and power system.

[0072] In some embodiments, as Figure 4 As shown, the high-voltage box 110 also includes an isolating switch K1; wherein, the first end of the isolating switch K1 is electrically connected to the other end of the first relay KA1, the second end of the isolating switch K1 is electrically connected to the other end of the second relay KA2, the third end of the isolating switch K1 is electrically connected to the third interface P+, ​​and the fourth end of the isolating switch K1 is electrically connected to the fourth interface P-.

[0073] Specifically, the isolating switch K1 is a crucial electrical device used to disconnect or close circuits when voltage is present but current is not, ensuring safe isolation. The primary function of the isolating switch K1 is to isolate live equipment from equipment undergoing power outages for maintenance, creating a clear disconnection and ensuring the safety of maintenance personnel.

[0074] In a dual-busbar wiring system, the isolating switch K1 can be used in conjunction with a circuit breaker to complete busbar switching operations under equipotential conditions. Furthermore, the isolating switch K1 can also be used to open and close low-current circuits such as unloaded transformers, voltage transformers, lightning arresters, and capacitors with currents not exceeding 5A.

[0075] In some embodiments, as Figure 5As shown, the present application further provides a battery cluster 100 , which includes at least one battery pack 120 and a high-voltage box 110 .

[0076] In this embodiment, the battery cluster 100 includes multiple battery packs 120 and a high-voltage box 110. The multiple battery packs 120 can be battery pack 1, battery pack 2,..., battery pack n. The multiple battery packs 120 are connected in series and electrically connected to the first interface B+ and the second interface B- of the high-voltage box 110. Each battery pack 120 is provided with a slave control board VCMU, and the high-voltage box 110 is provided with a master control board SBMU.

[0077] The main control board (SBMU) supports battery status data processing, enabling management and control of the battery cluster 100's charge and discharge. It also supports cluster voltage and current detection, and real-time isolated Hall sensor acquisition and processing. It also supports battery cluster 100 insulation detection, on / off detection, and single-cell SOC / SOH / SOE / SOP estimation, as well as cluster SOE and SOH estimation. The main control board (SBMU) also supports thermal management control, active thermal management, and data storage, including local storage of system operation data. It also supports system expansion, including multi-channel active / passive node outputs, and supports Bootloader upgrades or remote upgrades. The slave control board (VCMU) supports single-cell voltage and temperature monitoring, pole temperature monitoring, CAN communication, automatic addressing, active / passive balancing, and DO and DI signal transmission.

[0078] In some embodiments, as Figure 5 As shown, the present application also provides an energy storage system, which includes a junction box 200 and at least one battery cluster 100; wherein, one end of the third interface P+ is electrically connected to the other end of the first fuse FU1, one end of the fourth interface P- is electrically connected to the other end of the second interface B-, and the other end of the third interface P+ and the other end of the fourth interface P- are both electrically connected to the junction box 200.

[0079] In this embodiment, the energy storage system includes multiple battery clusters 100, a combiner cabinet 200, and a power conversion system (PCS). Each battery cluster 100 includes a high-voltage box 110, which can be named high-voltage box 1, ..., high-voltage box n. The combiner cabinet 200 includes a master control unit (MBMU). The MBMU supports real-time data access and display for multiple battery clusters 100, as well as interval data storage and alarms for overvoltage, undervoltage, overcurrent, overtemperature, voltage differential, temperature differential, and temperature rise. The MBMU also supports protection, online insulation testing, fault detection, thermal management control and protection, configuration of network and communication parameters, and remote upgrade of the BMS level 3 program.

[0080] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A high-voltage box, characterized in that: include: a first interface, one end of which is electrically connected to one end of the battery pack; a second interface, one end of the second interface being electrically connected to the other end of the battery pack; a first fuse, one end of the first fuse being electrically connected to the other end of the first interface to form a first node; a third interface, electrically connected to the other end of the first fuse; a fourth interface electrically connected to the other end of the second interface to form a second node; The main control module includes a voltage acquisition module, one end of the voltage acquisition module is electrically connected to the first node, and the other end of the voltage acquisition module is electrically connected to the second node.

2. The high-voltage box according to claim 1, characterized in that: The high voltage box also includes a second fuse; One end of the second fuse is electrically connected to the other end of the second interface to form the second node; the other end of the second fuse is electrically connected to the fourth interface.

3. The high-voltage box according to claim 2, characterized in that: The high voltage box also includes a Hall sensor; One end of the Hall sensor is electrically connected to the other end of the first interface; the other end of the Hall sensor is electrically connected to one end of the first fuse to form the first node.

4. The high-voltage box according to claim 2, characterized in that: The high-voltage box also includes a diverter; One end of the shunt is electrically connected to the other end of the second interface to form the second node; and the other end of the shunt is electrically connected to one end of the second fuse.

5. The high-voltage box according to any one of claims 1 to 4, characterized in that: The high voltage box also includes a first relay and a second relay; Among them, one end of the first relay is electrically connected to the other end of the first fuse, and the other end of the first relay is electrically connected to the third interface; one end of the second relay is electrically connected to the other end of the second interface, and the other end of the second relay is electrically connected to the fourth interface.

6. The high-voltage box according to claim 5, characterized in that: The high-voltage box also includes a pre-charging circuit; One end of the pre-charging circuit is electrically connected to one end of the first relay and the other end of the first fuse; the other end of the pre-charging circuit is electrically connected to the other end of the first relay and the third interface.

7. The high-voltage box according to claim 6, characterized in that: The pre-charging circuit includes a pre-charging relay and a pre-charging resistor; Among them, one end of the pre-filling relay is electrically connected to the other end of the pre-filling resistor, and the other end of the pre-filling relay is electrically connected to the third interface and the other end of the first relay; the other end of the pre-filling resistor is electrically connected to one end of the first relay and the other end of the first fuse.

8. The high-voltage box according to claim 5, characterized in that: The high-voltage box also includes an isolating switch; The first end of the isolating switch is electrically connected to the other end of the first relay, the second end of the isolating switch is electrically connected to the other end of the second relay, the third end of the isolating switch is electrically connected to the third interface, and the fourth end of the isolating switch is electrically connected to the fourth interface.

9. A battery cluster, characterized in that: The device comprises at least one battery pack and the high-voltage box according to any one of claims 1 to 8.

10. An energy storage system, characterized in that: comprising a combiner cabinet and at least one battery cluster according to claim 9; Among them, one end of the third interface is electrically connected to the other end of the first fuse, one end of the fourth interface is electrically connected to the other end of the second interface, and the other end of the third interface and the other end of the fourth interface are both electrically connected to the junction box.

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