High-voltage box and convergence cabinet

Abstract

The utility model relates to a high-voltage box and a convergence cabinet. The high-voltage box comprises a main positive loop, a main negative loop, a switch assembly, a current detection module and a communication assembly. The main positive loop and the main negative loop are respectively used for connecting an external battery control module, an alternating current power supply and a battery; the switch assembly is arranged in the main positive loop and the main negative loop; the current detection module is arranged in the main negative loop and is used for acquiring a current detection signal; the communication assembly is connected with the current detection module and the switch assembly, and is used for transmitting a received current detection signal to the battery control module, and receiving a control signal fed back by the battery control module to control the on-off of the switch assembly. The high-voltage box provided by the utility model has higher adaptability and can adapt to more control systems.

Description

Technical Field

[0001] This application relates to the technical field of battery management, and particularly to a high-voltage box and a busbar cabinet. Background Art

[0002] With the development of economy and society, and the continuous improvement of people's living standards, the peak-valley difference presented by the load curve is getting larger and larger, which also causes the imbalance between supply and demand in the power system. Since the power generation, transmission, transformation, distribution and consumption of the power system are carried out continuously, the electric energy remains balanced at all times. The shortage of peak power has caused serious impacts on the normal life of local residents and the development of local economy and industries, restricting the development of social economy. On the contrary, the low-valley load brings difficulties to the stability control of the power system on the one hand, and causes waste of resources on the other hand. A large number of power equipment in the system are idle, and the capacity of these equipment is not fully utilized, resulting in a decline in the economic efficiency of system operation. Of course, there are also some large-scale peak-shaving power plants and pumped-storage power stations built in the system, but the peak-shaving costs of such power plants are relatively high, the equipment utilization rate is low, and resources are wasted, which also causes a further increase in the power generation cost. Chemical energy storage mainly refers to battery energy storage. The battery energy storage system (BESS) is the most widely used energy storage system. In comparison, the advantages of BESS are: first, the cost is relatively low, the technology is mature, and the charge-discharge multiple is high; second, it has good modularity and can be used as a distributed energy storage device. The battery electromagnetic energy storage system is one of the primary selection technologies for large-scale grid-connected energy storage and regulation of wind power and solar power generation. It is generally used for load leveling (i.e., peak shaving and valley filling) of substations, renewable energy power generation systems (stabilizing the power grid), and system backup (playing the roles of rotating backup and accident emergency backup). Therefore, the battery energy storage system has good application prospects in active distribution networks. Electrochemical energy storage mainly refers to battery energy storage. The battery energy storage system (BESS) is the most widely used energy storage system. In comparison, the advantages of BESS are: first, the cost is relatively low, the technology is mature, and the charge-discharge multiple is high; second, it has good modularity and can be used as a distributed energy storage device. The battery electromagnetic energy storage system is one of the primary selection technologies for large-scale grid-connected energy storage and regulation of wind power and solar power generation. It is generally used for load leveling (i.e., peak shaving and valley filling) of substations, renewable energy power generation systems (stabilizing the power grid), and system backup (playing the roles of rotating backup and accident emergency backup). Therefore, the battery energy storage system has good application prospects in active distribution networks.

[0003] However, the current electrochemical energy storage system has the problem of poor adaptability and inability to adapt to more system configurations. Summary of the Utility Model

[0004] Based on this, in view of the problem that the current electrochemical energy storage system has poor adaptability and cannot adapt to more system configurations, it is necessary to provide a high-voltage box and a busbar cabinet with stronger adaptability.

[0005] In a first aspect, the present application provides a high-voltage box, which includes a main positive circuit, a main negative circuit, a switch assembly, a current detection module, and a communication assembly; the main positive circuit and the main negative circuit are respectively used to connect an external battery control module, an AC power supply, and a battery; the switch assembly is arranged in the main positive circuit and the main negative circuit; the current detection module is arranged in the main negative circuit and is used to obtain a current detection signal; the communication assembly is respectively connected to the current detection module and the switch assembly, and is used to transmit the received current detection signal to the battery control module and receive a control signal fed back by the battery control module to control the on / off of the switch assembly.

[0006] In one embodiment, two ends of the main positive circuit are respectively used to connect the positive electrode of the battery and the positive electrode of the AC power supply; two ends of the main negative circuit are respectively used to connect the negative electrode of the battery and the negative electrode of the AC power supply; the switch assembly includes a fusion switch integrated with a contactor assembly, a pre-charge switch group, and a circuit breaker assembly. A first end of the contactor assembly, a first end of the pre-charge switch group, and a first end of the circuit breaker assembly are all connected to the positive electrode of the battery; a second end of the contactor assembly, a second end of the pre-charge switch group, and a second end of the circuit breaker assembly are all connected to the positive electrode of the AC power supply; a third end of the contactor assembly and a third end of the circuit breaker assembly are both connected to the negative electrode of the battery through the current detection module; a fourth end of the contactor assembly and a fourth end of the circuit breaker assembly are both connected to the negative electrode of the AC power supply;

[0007] A controlled end and a feedback end of the circuit breaker assembly, and a controlled end of the pre-charge switch group are all connected to the communication assembly; the feedback end of the circuit breaker assembly includes the first end and the third end of the circuit breaker assembly.

[0008] In one embodiment, the circuit breaker assembly includes a main positive switch, a main negative switch, and a shunt trip. Two ends of the main positive switch are respectively connected to the positive electrode of the battery and the positive electrode of the AC power supply; the main negative switch is connected in parallel with the shunt trip, and two ends of the main negative switch are respectively connected to the negative electrode of the battery and the negative electrode of the AC power supply.

[0009] In one embodiment, the switch assembly further includes a first fuse and a second fuse. The first fuse is arranged in the main positive circuit and is respectively connected to the first end of the circuit breaker assembly, the first end of the pre-charge switch group, and the positive electrode of the battery through the main positive circuit; the second fuse is arranged in the main negative circuit and is respectively connected to the third end of the circuit breaker assembly, the third end of the pre-charge switch group, and the negative electrode of the battery through the main negative circuit.

[0010] In one embodiment, the pre-charge switch group includes a pre-charge resistor and a pre-charge switch. Two ends of the pre-charge resistor are respectively connected to one end of the pre-charge switch and the first end of the circuit breaker assembly, and the other end of the pre-charge switch is connected to the second end of the circuit breaker assembly.

[0011] In one embodiment, the communication component includes a first communication interface and a second communication interface. The first communication interface is respectively connected to the current detection module and the switch component, and is used to connect to the battery control module to send the received current detection signal to the battery control module, and send the received control signal to the switch component to control the on / off of the switch component; the second communication interface is connected to the switch component and is used to connect to the battery control module to feedback the signal output after the switch component is turned on / off to the battery control module.

[0012] In one embodiment, the high-voltage box further includes a power interface, which is connected to the switch component and the current detection module, and is used to connect to an external switching power supply to transmit electric energy of different voltages to the switch component and the current detection module.

[0013] In one embodiment, the high-voltage box further includes a body, a support structure and a plurality of heat sinks; the support structure is arranged on the inner wall of the body, and the support structure is used to accommodate the main positive circuit, the main negative circuit, the switch component, the current detection module and the communication component; the plurality of heat sinks are arranged on the outer wall of the body.

[0014] In a second aspect, the present application provides a busbar cabinet, including:

[0015] The high-voltage box as described above;

[0016] A battery control module, which is connected to the main positive circuit, the main negative circuit and the communication component in the high-voltage box.

[0017] In one embodiment, the battery control module is arranged on the top of the busbar cabinet; the high-voltage box is arranged below the battery control module; the busbar cabinet further includes:

[0018] A power distribution module, which is arranged below the high-voltage box and is connected to the high-voltage box, and is used to perform voltage regulation processing on the electric energy output by the high-voltage box.

[0019] The above-mentioned high-voltage box and busbar cabinet, the high-voltage box includes a main positive circuit, a main negative circuit, a switch assembly, a current detection module and a communication component; the main positive circuit and the main negative circuit are respectively used to connect an external battery control module, an AC power supply and a battery; the switch assembly is arranged in the main positive circuit and the main negative circuit; the current detection module is arranged in the main negative circuit and is used to obtain a current detection signal; the communication component is respectively connected to the current detection module and the switch assembly and is used to transmit the received current detection signal to the battery control module and receive a control signal fed back by the battery control module to control the on / off of the switch assembly. Since a communication component is added to the high-voltage box in this application, the communication component can be respectively connected to the current detection module and the switch assembly and can communicate with an external battery control module, so that the battery control module can feedback a corresponding control signal based on the received current detection signal. At this time, the communication component can transmit this control signal to the switch assembly to realize the control of the on / off of the switch assembly. Therefore, the high-voltage box of this application can adapt to a variety of battery control modules under the action of the communication component, thereby improving the adaptability of the high-voltage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the high-voltage box in an embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of the fusion switch in an embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of the contactor assembly in an embodiment of the present application;

[0024] Figure 4 It is a schematic structural diagram of the pre-charge switch group in an embodiment of the present application;

[0025] Figure 5 It is a schematic structural diagram of the circuit breaker assembly in an embodiment of the present application;

[0026] Figure 6 It is a schematic structural diagram of the switch assembly in an embodiment of the present application;

[0027] Figure 7 It is a schematic structural diagram of the communication component in an embodiment of the present application;

[0028] Figure 8Schematic diagram of the structure of a busbar cabinet in an embodiment of the present application.

[0029] Explanation of the reference numerals in the drawings:

[0030] Busbar cabinet: 10; High-voltage box: 100; Main positive circuit: 110; Main negative circuit: 120; Switch assembly: 130; Fusion switch: 131; Contactor assembly: 1311; Pre-charge switch group: 1312; Circuit breaker assembly: 1313; First fuse: FU1; Second fuse: FU2; Current detection module: 140; Communication component: 150; First communication interface: 151; Second communication interface: 152; Battery control module: 200; Power distribution module: 300. Detailed implementation manners

[0031] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0036] The high-voltage box in this embodiment is connected to an external battery management module, so that the battery management module receives current detection signals, monitors the status information of the battery in real time, and outputs corresponding control signals according to the current detection signals to control the on-off of the switch assembly in the high-voltage box. The battery management module can be a battery control unit (BCU), and the BCU is a core component of the battery management system. It is mainly used to monitor various parameters of the battery in real time, including key parameters such as voltage, current, and temperature. These data help the system understand the health status of the battery and detect potential problems in a timely manner. Further, the BCU can also execute corresponding control strategies based on the monitored data. The BCU will adjust the charging rate, control the discharging process, and start the heat dissipation or heating function when necessary to maintain the optimal operating temperature of the battery. Based on the obtained current detection signals, controlling the on-off of the switch assembly can achieve the protection of the battery, avoid unsafe situations such as overcharging, over-discharging, and overheating of the battery, thereby extending the service life of the battery and ensuring safe use.

[0037] Refer to Figure 1 , Figure 1 shows a schematic structural diagram of a high-voltage box in an embodiment of the present application. The high-voltage box in this embodiment includes a main positive circuit 110, a main negative circuit 120, a switch assembly 130, a current detection module 140, and a communication component 150; the main positive circuit 110 and the main negative circuit 120 are respectively used to connect an external battery control module 200, an AC power supply (not shown in the figure), and a battery (not shown in the figure). Figure 1 not shown in the figure), and a battery (not shown in the figure). Figure 1not shown); the switch assembly 130 is disposed in the main positive circuit 110 and the main negative circuit 120; the current detection module 140 is disposed in the main negative circuit 120 for obtaining a current detection signal; the communication assembly 150 is respectively connected to the current detection module 140 and the switch assembly 130, and is configured to transmit the received current detection signal to the battery control module 200 and receive a control signal fed back by the battery control module 200 to control the on / off of the switch assembly 130.

[0038] Wherein, in this embodiment, the working voltage of the high-voltage box is DC1500V and the working current is 350A, which can be downward compatible with a variety of battery control modules 200 to improve the adaptability. The current detection module 140 can be any circuit or component capable of collecting current signals. Exemplarily, the current detection module 140 can be a current sensor, a current transformer, etc.

[0039] Both ends of the main positive circuit 110 are respectively connected to the positive electrode P+ of the AC power supply and the positive electrode B+ of the battery. At the same time, the end of the main positive circuit 110 connected to the positive electrode P+ of the AC power supply is also connected to the corresponding positive wiring terminal in the battery control module 200. Both ends of the main negative circuit 120 are respectively connected to the negative electrode P- of the AC power supply and the negative electrode B- of the battery.

[0040] Exemplarily, refer to the attached Figure 1 、 2 ,the attached Figure 2 shows a schematic structural diagram of the fusion switch 131. The switch assembly 130 includes a fusion switch 131 integrating a contactor assembly 1311, a pre-charge switch group 1312, and a circuit breaker assembly 1313. The first end 1 of the contactor assembly 1311, the first end 1 of the pre-charge switch group 1312, and the first end 1 of the circuit breaker assembly 1313 are all connected to the positive electrode B+ of the battery; the second end 2 of the contactor assembly 1311, the second end 2 of the pre-charge switch group 1312, and the second end 2 of the circuit breaker assembly 1313 are all connected to the positive electrode P+ of the AC power supply; the third end 3 of the contactor assembly 1311 and the third end 3 of the circuit breaker assembly 1313 are both connected to the negative electrode B- of the battery via the current detection module 140; the fourth end 4 of the contactor assembly 1311 and the fourth end 4 of the circuit breaker assembly 1313 are both connected to the negative electrode P- of the AC power supply; the controlled end and the feedback end of the circuit breaker assembly 1313, and the controlled end of the pre-charge switch group 1312 are all connected to the communication assembly 150; the feedback end of the circuit breaker assembly 1313 includes the first end 1 and the third end 3 of the circuit breaker assembly 1313.

[0041] Wherein, refer to the attached Figure 3 ,the attached Figure 3The structural schematic diagram of the contactor assembly 1311 in this embodiment is shown. Exemplarily, the contactor assembly 1311 in this embodiment may include a main positive contactor KM1 and a main negative contactor KM2. Two ends of the main positive contactor KM1 are respectively connected to the positive electrode B+ of the battery and the positive electrode P+ of the AC power supply. Two ends of the main negative contactor KM2 are respectively connected to the negative electrode B- of the battery and the negative electrode P- of the AC power supply.

[0042] Among them, referring to the appendix Figure 4 , the appendix Figure 4 shows the structural schematic diagram of the pre-charge switch group 1312 in this embodiment. The pre-charge switch group 1312 includes a pre-charge resistor R and a pre-charge switch K. Two ends of the pre-charge resistor R are respectively connected to one end of the pre-charge switch K and the first end 1 of the circuit breaker assembly 1313. The other end of the pre-charge switch K is connected to the second end 2 of the circuit breaker assembly 1313.

[0043] Among them, referring to the appendix Figure 5 , the appendix Figure 5 is the structural schematic diagram of the circuit breaker assembly 1313 in this embodiment. Exemplarily, the circuit breaker assembly 1313 includes a main positive switch S1, a main negative switch S2, and a shunt trip MX. The main positive switch S1 is arranged in the main positive circuit 110. The main negative switch S2 is arranged in the main negative circuit 120, that is, two ends of the main positive switch S1 are respectively connected to the positive electrode B+ of the battery and the positive electrode P+ of the AC power supply. The main negative switch S2 is connected in parallel with the shunt trip MX, and two ends of the main negative switch S2 are respectively connected to the negative electrode B- of the battery and the negative electrode P- of the AC power supply. In this embodiment, the switch assembly 130 is set as a fusion switch 131 integrated with the contactor assembly 1311, the pre-charge switch group 1312, and the circuit breaker assembly 1313, which can avoid the adhesion of components in the switch assembly 130 due to their own structural characteristics not being able to withstand large currents, thereby avoiding the circuit operation risk.

[0044] Exemplarily, referring to the appendix Figure 6 , the appendix Figure 6 is the structural schematic diagram of the switch assembly 130 in an embodiment of this application. The switch assembly 130 further includes a first fuse FU1 and a second fuse FU2. The first fuse FU1 is arranged in the main positive circuit 110 and is respectively connected to the first end 1 of the circuit breaker assembly 1313, the first end 1 of the pre-charge switch group 1312, and the positive electrode B+ of the battery through the main positive circuit 110. The second fuse FU2 is arranged in the main negative circuit 120 and is respectively connected to the third end 3 of the circuit breaker assembly 1313, the third end 3 of the pre-charge switch group 1312, and the negative electrode B- of the battery through the main negative circuit 120.

[0045] In this embodiment, a communication component 150 is added to the high-voltage box. The communication component 150 can be respectively connected to the current detection module 140 and the switch component 130, and can be communicatively connected to an external battery control module 200, enabling the battery control module 200 to feedback a corresponding control signal based on the received current detection signal. At this time, the communication component 150 can transmit this control signal to the switch component 130 to control the on / off of the switch component 130. Therefore, under the action of the communication component 150, the high-voltage box of this application can be adapted to a variety of battery control modules 200, thereby improving the adaptability of the high-voltage box.

[0046] In one embodiment, refer to the appendix Figure 1 and the appendix Figure 7 , the appendix Figure 7 is a schematic structural diagram of the communication component 150 in an embodiment of this application. The communication component 150 in this embodiment includes a first communication interface 151 and a second communication interface 152. The first communication interface 151 is respectively connected to the current detection module 140 and the switch component 130, and is used to connect to the battery control module 200 to send the received current detection signal to the battery control module 200, and send the received control signal to the switch component 130 to control the on / off of the switch component 130; the second communication interface 152 is connected to the switch component 130 and is used to connect to the battery control module 200 to feedback the signal output after the switch component 130 is turned on / off to the battery control module 200.

[0047] Refer to the appendix Figure 7 , the DOL1 terminal in the first communication interface 151 is connected to the shunt trip in the breaker component 1313, the DOL2 terminal in the first communication interface 151 is connected to the controlled terminal of the main positive switch in the breaker component 1313, the DOL3 terminal in the first communication interface 151 is connected to the controlled terminal of the main negative switch in the breaker component 1313, and the DOL4 terminal in the first communication interface 151 is connected to the controlled terminal of the precharge switch in the precharge switch group 1312, and is used to transmit the received control signal to respectively control the on / off of the main positive switch and the main negative switch in the breaker component 1313 and the precharge switch in the precharge switch group 1312. The CAN_H interface and the CAN_L interface of the first communication interface 151 are respectively connected to the current detection module 140 to receive the current detection signal from the current detection module 140. The output terminal of the first communication interface 151 is used to connect to the battery control module.

[0048] The DI1 terminal and the DI2 terminal of the second communication interface 152 are respectively connected to the feedback terminals of the main positive switch and the main negative switch in the circuit breaker assembly 1313 (i.e., the first terminal and the third terminal of the circuit breaker assembly 1313), so as to respectively receive the signals output after the main positive switch and the main negative switch are turned on and off, enabling the battery management module 200 to confirm the control results of the main positive switch and the main negative switch according to the signals output after the main positive switch and the main negative switch are turned on and off.

[0049] In one embodiment, the high-voltage box further includes a power interface, which is connected to the switch assembly and the current detection module, and is used to connect to an external switching power supply and transmit electric energy of different voltages to the switch assembly and the current detection module.

[0050] Exemplarily, the power interface converts the electric energy output by the switching power supply into voltages of 12V and 24V respectively. The power interface is provided with a 24V+ interface, a 24V- interface, a 12V+ interface and an equivalent ground interface. The 24V+ interface and the 24V- interface are connected to the output terminals of the switching power supply. The 12V+ interface and the equivalent ground interface are respectively connected to both ends of the first communication interface of the current detection module. The 24V+ interface is respectively connected to the shunt trip of the circuit breaker assembly, the controlled terminals of the circuit breaker assembly (including the controlled terminals of the main positive switch and the main negative switch), the first terminal of the circuit breaker assembly, the second terminal of the circuit breaker assembly, and the controlled terminals of the pre-charge switches in the pre-charge switch group.

[0051] In one embodiment, the high-voltage box further includes a body, a support structure and a plurality of heat sinks; the support structure is arranged on the inner wall of the body and is used to accommodate the main positive circuit, the main negative circuit, the switch assembly, the current detection module and the communication assembly; the plurality of heat sinks are arranged on the outer wall of the body, which can improve the heat dissipation capacity of the high-voltage box and extend the service life of the high-voltage box.

[0052] Specifically, the support structure in this embodiment can be a support frame. A plurality of support plates are fixed on the outer wall of the top of the support frame. The outer wall of the top of the support plates is fixed to the inner wall of the top of the high-voltage box body. The support plates penetrate through the outer wall of the top of the support frame. The outer wall of the bottom of the support plates is fixed to the inner wall of the bottom of the high-voltage box body. A first reinforcing rib is fixed on one outer wall of the support plates. A second reinforcing rib is fixed on one outer wall of the support plates and the support frame. A rectangular through hole is opened on the inner wall of the top of the high-voltage box body. A placement frame is fixed on the inner wall of the rectangular through hole. A second filter screen is arranged on the inner wall of the placement frame. A top cover is fixed on the outer wall of the top of the high-voltage box body. A cover plate is connected to one outer wall of the top cover through a hinge.

[0053] Refer to the appendix Figure 8 appendix Figure 8The structure schematic diagram of the busbar cabinet 10 in an embodiment of the present application is shown. The busbar cabinet 10 in this embodiment includes a battery control module 200 and the high-voltage box 100 in any of the above embodiments. The battery control module 200 is connected to the main positive circuit, the main negative circuit, and the communication component in the high-voltage box 100.

[0054] The working voltage of the high-voltage box in this embodiment is DC2000V, and the working current is 400A. Among them, the working voltage of the components in the high-voltage box is DC2000V, and the working current is 400A and above. Therefore, the high-voltage box in this embodiment can be downward compatible with the DC1000V system and the DC1500V system.

[0055] It can be understood that the busbar cabinet 10 in this embodiment includes the high-voltage box 100 in the above embodiment. Therefore, when the high-voltage box 100 has further beneficial effects compared with the prior art, the busbar cabinet 10 in this embodiment also correspondingly has further beneficial effects.

[0056] In one embodiment, continue to refer to the appendix Figure 8 , the battery control module 200 is arranged at the top of the busbar cabinet 10; the high-voltage box 100 is arranged below the battery control module 200; the busbar cabinet 10 further includes a power distribution module 300, and the power distribution module 300 is arranged below the high-voltage box and is connected to the high-voltage box 100 for voltage regulation processing of the electric energy output by the high-voltage box 100.

[0057] The busbar cabinet 10 in this embodiment is provided with nine high-voltage boxes 100, which can be respectively connected to nine clusters of battery systems. Nine high-voltage boxes 100 need to be equipped for the existing nine clusters, and their installation positions are at the bottom of each cluster. In the liquid cooling scheme, the protection level requirements for them are relatively high. In this embodiment, all nine high-voltage boxes 100 are installed in the middle section of the busbar cabinet 10, and all the battery control modules 200 are installed in the upper section of the busbar cabinet 10. The lower section of the busbar cabinet 10 is the power distribution module 300, which greatly saves the space inside the high-voltage box 100, is more convenient and cost-saving. There is no need to design the battery control module 200 inside the high-voltage box 100, and the BCUs of all brands can be directly installed at the upper end of the busbar cabinet 10, with strong adaptability.

[0058] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0059] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A high-voltage box, characterized in that: It includes a main positive circuit, a main negative circuit, a switch component, a current detection module and a communication component; the main positive circuit and the main negative circuit are respectively used to connect an external battery control module, an AC power supply and a battery; the switch component is arranged in the main positive circuit and the main negative circuit; the current detection module is arranged in the main negative circuit, and is used to obtain a current detection signal; the communication component is respectively connected to the current detection module and the switch component, and is used to transmit the received current detection signal to the battery control module, and receive the control signal fed back by the battery control module to control the on and off of the switch component.

2. The high-voltage box according to claim 1, characterized in that: The two ends of the main positive circuit are respectively used to connect the positive electrode of the battery and the positive electrode of the AC power supply; the two ends of the main negative circuit are respectively used to connect the negative electrode of the battery and the negative electrode of the AC power supply; the switch assembly includes a fusion switch integrating a contactor assembly, a pre-charging switch group and a circuit breaker assembly, the first end of the contactor assembly, the first end of the pre-charging switch group and the first end of the circuit breaker assembly are all connected to the positive electrode of the battery; the second end of the contactor assembly, the second end of the pre-charging switch group and the second end of the circuit breaker assembly are all connected to the positive electrode of the AC power supply; the third end of the contactor assembly and the third end of the circuit breaker assembly are both connected to the negative electrode of the battery via the current detection module; the fourth end of the contactor assembly and the fourth end of the circuit breaker assembly are both connected to the negative electrode of the AC power supply; The controlled end and feedback end of the circuit breaker assembly and the controlled end of the pre-charging switch group are all connected to the communication assembly; the feedback end of the circuit breaker assembly includes the first end of the circuit breaker assembly and the third end of the circuit breaker assembly.

3. The high-voltage box according to claim 2, characterized in that: The circuit breaker assembly includes a main positive switch, a main negative switch and a shunt trip, wherein two ends of the main positive switch are respectively connected to the positive pole of the battery and the positive pole of the AC power supply; the main negative switch is connected in parallel with the shunt trip, and two ends of the main negative switch are respectively connected to the negative pole of the battery and the negative pole of the AC power supply.

4. The high-voltage box according to claim 2, characterized in that: The switch assembly also includes a first fuse and a second fuse. The first fuse is arranged in the main positive circuit and is respectively connected to the first end of the circuit breaker assembly, the first end of the pre-charging switch group and the positive electrode of the battery through the main positive circuit; the second fuse is arranged in the main negative circuit and is respectively connected to the third end of the circuit breaker assembly, the third end of the pre-charging switch group and the negative electrode of the battery through the main negative circuit.

5. The high-voltage box according to any one of claims 2 to 4, characterized in that: The pre-charging switch group includes a pre-charging resistor and a pre-charging switch, wherein two ends of the pre-charging resistor are respectively connected to one end of the pre-charging switch and a first end of the circuit breaker assembly, and the other end of the pre-charging switch is connected to a second end of the circuit breaker assembly.

6. The high-voltage box according to claim 1, characterized in that: The communication component includes a first communication interface and a second communication interface, the first communication interface is respectively connected to the current detection module and the switch component, and is used to connect the battery control module to send the received current detection signal to the battery control module, and send the received control signal to the switch component to control the on and off of the switch component; the second communication interface is connected to the switch component, and is used to connect the battery control module, and is used to feed back the signal output after the switch component is turned on and off to the battery control module.

7. The high-voltage box according to claim 1, characterized in that: The high-voltage box also includes a power supply interface, which is connected to the switch component and the current detection module and is used to connect an external switching power supply and transmit electric energy of different voltages to the switch component and the current detection module.

8. The high-voltage box according to claim 1, characterized in that: The high-voltage box also includes a main body, a supporting structure and a plurality of heat sinks; the supporting structure is arranged on the inner wall of the main body, and the supporting structure is used to accommodate the main positive circuit, the main negative circuit, the switch component, the current detection module and the communication component; the plurality of heat sinks are arranged on the outer wall of the main body.

9. A combiner cabinet, characterized in that: It comprises a battery control module and a high-voltage box as described in any one of claims 1 to 8; the battery control module is connected to a main positive circuit, a main negative circuit, and a communication component in the high-voltage box.

10. The combiner cabinet according to claim 9, characterized in that: The battery control module is arranged on the top of the junction cabinet; the high-voltage box is arranged below the battery control module; the junction cabinet also includes a power distribution module, which is arranged below the high-voltage box and connected to the high-voltage box for voltage regulation of the electric energy output by the high-voltage box.

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