Combiner cabinet and energy storage system

Abstract

Provided in the present application are a combiner cabinet and an energy storage system. The combiner cabinet comprises a cabinet body and electrical component assemblies, wherein the electrical component assemblies are mounted in the cabinet body, a plurality of electrical component assemblies are provided and configured to be electrically connected to a plurality of battery packs, the plurality of electrical component assemblies are arranged from top to bottom in the direction of height of the combiner cabinet, and each electrical component assembly is configured to be electrically connected to an external multi-cluster high-voltage box and is configured to be electrically connected to one battery pack.

Description

combiner cabinets and energy storage systems

[0001] This application claims priority to Chinese Patent Application No. 202421848722.8, filed with the Chinese Patent Office on July 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage technology, specifically to a combiner cabinet and an energy storage system. Background Technology

[0003] In related technologies, energy storage systems typically consist of an electrical control cabinet and a combiner cabinet, each existing as an independent equipment cabinet. The combiner cabinet achieves the current combining effect, while the electrical control cabinet controls the input or output current and voltage of the combiner cabinet. Invention Overview

[0004] In related technologies, combiner cabinets can often only control one battery pack, which cannot meet the current combination requirements of two battery packs. If multiple battery packs need to be controlled, multiple combiner cabinets can be used, which leads to problems such as large footprint, inconvenience of use, and high cost.

[0005] This application provides a combiner cabinet. The combiner cabinet includes:

[0006] Cabinet;

[0007] The electrical component assembly is installed inside the cabinet. There are multiple sets of electrical component assemblies, which are configured to be electrically connected to multiple battery packs. The multiple sets of electrical component assemblies are arranged from top to bottom along the height of the combiner cabinet. Each electrical component assembly is configured to be electrically connected to multiple external high-voltage boxes and to a battery pack.

[0008] This application also provides an energy storage system. The energy storage system includes a combiner cabinet as described above. Beneficial effects

[0009] The combiner cabinet provided in this application includes an electrical component assembly configured to be electrically connected to an external multi-cell high-voltage box and to a battery pack. This allows the electrical component assembly to combine current to the external multi-cell high-voltage box, which then charges and discharges the battery pack via the combined current. By housing multiple sets of electrical component assemblies and configuring them to be electrically connected to multiple battery packs, the combiner cabinet can meet the current combining requirements of multiple battery packs, thus improving upon the limitations of combiner cabinets in related technologies that struggle to meet the current combining requirements of multiple battery packs. Furthermore, the multiple sets of electrical component assemblies are arranged from top to bottom along the height of the combiner cabinet, resulting in a smaller footprint and a more compact structure.

[0010] The energy storage system provided in this application, employing the aforementioned combiner cabinet, can meet the current-carrying requirements of multiple battery packs, thereby improving the situation in related technologies where combiner cabinets struggle to meet the current-carrying requirements of multiple battery packs. Furthermore, the arrangement of multiple electrical components from top to bottom along the height of the combiner cabinet also results in a smaller footprint and a more compact structure. Attached Figure Description

[0011] Figure 1 is an exploded view of the combiner cabinet provided in this application;

[0012] Figure 2 is a schematic diagram of the structure of the middle layer plate in Figure 1;

[0013] Figure 3 is a circuit diagram of the combiner cabinet provided in this application;

[0014] Figure 4 is a perspective view of the combiner cabinet provided in this application with the cabinet door removed from the first angle;

[0015] Figure 5 is a perspective view of the combiner cabinet provided in this application with the cabinet door removed from the second angle;

[0016] Figure 6 is a schematic diagram of the cabinet door in Figure 1;

[0017] Figure 7 is a perspective view of the combiner cabinet provided in this application with the cabinet door removed from the third angle;

[0018] Figure 8 is a perspective view of the combiner cabinet provided in this application with the cabinet door removed from the fourth angle;

[0019] Figure 9 is a perspective view of the combiner cabinet provided in this application with the cabinet door removed from the fifth angle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 10. Cabinet body; 11. Cabinet door; 12. Mounting cavity; 121. First mounting cavity; 123. Second mounting cavity; 1211. First mounting space; 1213. Second mounting space; 13. First side wall; 14. Electrical component assembly; 15. Second side wall; 17. Third side wall; 18. Top wall; 19. Bottom wall; 1010. Air outlet; 1030. Air inlet; 20. Shelf; 21. First shelf; 23. Second shelf; 25. Third shelf; 31. BMS control unit; 33. Signal relay; 35. 36. Air circuit breaker; 37. Cable tray; 38. Terminal block; 40. AC / DC power supply; 41. First operation module; 41. Indicator light module; 411. Running indicator light; 413. Fault indicator light; 415. Closing indicator light; 412. Over-temperature indicator light; 414. 24V voltage indicator light; 416. Low SOC indicator light; 43. Switch module; 431. Remote / local control switch; 433. Start / stop control switch; 435. Mute control switch; 437. Emergency stop switch; 45. Buzzer; 47. 50. Display module; 60. Second operation module; 60. Warning module; 601. First filter; 602. Second filter; 603. Insulating plate; 70. Positive terminal section; 71. Positive fuse; 72. Positive high voltage relay; 73. Positive terminal interface; 74. Circuit breaker; 741. First circuit breaker; 743. Second circuit breaker; 701. First copper busbar; 75. Cluster high voltage positive terminal connection copper busbar; 76. Cluster high voltage positive terminal to circuit breaker copper busbar; 77. Circuit breaker to output positive copper busbar; 80. Negative terminal section; 801. Second copper busbar; 81. Negative terminal section; 82. Fuse; 83. Negative high-voltage relay; 84. Negative terminal interface; 85. High-voltage negative terminal connection copper busbar; 86. High-voltage negative terminal to circuit breaker copper busbar; 87. Circuit breaker to output negative copper busbar; 90. Inlet port; 91. Pre-charge resistor; 100. Control unit; 101. First sub-control unit; 103. Second sub-control unit; 200. Adjustment indicator unit; 300. Auxiliary power unit; 301. Auxiliary power positive fuse; 303. Auxiliary power negative fuse; 305. Auxiliary power positive terminal interface; 307. Auxiliary power negative terminal interface; 400. Surge protection unit;

[0022] 401. First surge fuse; 405. Surge protector; 403. Second surge fuse. Embodiments of the present invention

[0023] Referring to Figure 1, the junction box in this embodiment includes a cabinet body 10 and a cabinet door 11. The cabinet body 10 has a mounting cavity 12, and the cabinet door 11 is connected to the cabinet body 10, configured to expose or cover the mounting cavity 12, or in other words, configured to open and close the cabinet body 10. Shelves 20 are installed in the mounting cavity 12. The cabinet door 11 may be rotatably connected to the cabinet body 10.

[0024] The cabinet 10 may specifically include a first side wall 13, a second side wall 15, and a third side wall 17, which define an installation cavity 12. The second side wall 15 and the third side wall 17 are arranged opposite to each other. The first side wall 13 is arranged opposite to the cabinet door 11 and is located between the second side wall 15 and the third side wall 17. The two opposite sides of the first side wall 13 can be connected to the second side wall 15 and the third side wall 17 respectively.

[0025] Referring to Figure 4, the cabinet also includes a top wall 18 and a bottom wall 19. It is easy to understand that the top wall 18 is located at the top of the cabinet 10, and the bottom wall 19 is at the bottom of the cabinet. Along the height of the junction box, the top wall 18, the first side wall 13, and the bottom wall 19 are arranged sequentially. The arrangement direction of the cabinet door 11 and the first side wall 13 is the first direction (or the width direction of the cabinet), and the arrangement direction of the top wall 18 and the bottom wall 19 is the second direction (or the height direction of the cabinet). The first direction is perpendicular to the second direction.

[0026] Referring to Figure 2, the junction box also includes a shelf 20, which is installed in the mounting cavity 12 of the cabinet and can be configured to install electrical component assemblies 14. The shelf 20 is located between the cabinet door 11 and the first side wall 13, and the shelf 20 and the cabinet door 11 are positioned opposite each other. The first side wall 13, the shelf, and the cabinet door 11 can be arranged along a first direction, or the width direction of the junction box. The opposite sides of the shelf 20 can be connected to the second side wall 15 and the third side wall 17, respectively.

[0027] Since the electrical component assembly 14 contains many electrical components, if they are all installed on the same plane, the cabinet will become very large. In order to further reduce the volume of the junction box, there can be multiple shelves 20. The multiple shelves 20 can be arranged along the first direction or the width direction of the junction box. In some embodiments, the shelves 20 can include a first shelf 21 and a second shelf 23 arranged sequentially along the first direction (or the width direction of the junction box). The first shelf 21 and the second shelf 23 are both configured to install the electrical component assembly 14. The second shelf 23 is located between the first shelf 21 and the cabinet door 11. Along the width direction of the junction box, at least part of the projection of the first shelf 21 on the cabinet door is above the projection of the second shelf 23 on the cabinet door 11. In the embodiments of this application, the cabinet door and the first side wall are arranged in the first direction. By setting the electrical component assembly 14 in the mounting cavity and arranging the positive and negative terminals of the electrical component assembly 14 along the first direction, the electrical components at both ends are close to each other, and the wiring distance required between the electrical components is short, which is convenient for the staff to operate.

[0028] Shelf 20 may further include a third shelf 25 configured to mount electrical component assembly 14. The first shelf 21 is closer to the first sidewall 13 than the second shelf 23 and the third shelf 25. The third shelf 25 is closer to the cabinet door than the first shelf 21 and the second shelf 23. The second shelf 23 is located between the first shelf 21 and the third shelf 25. Along the width direction of the junction box, at least a portion of the projection of the first shelf 21 onto the cabinet door 11 is above the projection of the third shelf 25 onto the cabinet door 11. In some embodiments, the first shelf 21 may be mounted on the first sidewall 13. In other embodiments, the first shelf 21 may have two opposite sides connected to the second sidewall 15 and the third sidewall 17, respectively.

[0029] The combiner cabinet also includes an electrical component assembly 14, which is installed in the mounting cavity 12 of the cabinet 10. The electrical component assembly 14 may include a positive electrode 70 and a negative electrode 80, which are spaced apart. The positive electrode 70 is configured to be electrically connected to the positive output terminal of the external high-voltage box and to the positive terminal of the battery pack. The negative electrode 80 is configured to be electrically connected to the negative output terminal of the external high-voltage box and to the negative terminal of the battery pack.

[0030] Referring to Figure 3, in some embodiments, the external high-voltage box can be multiple clusters. The combiner cabinet can combine current from these multiple external high-voltage boxes and control the current and / or voltage of the input battery pack. The positive output terminal of the external multiple high-voltage box (refer to B1+...B4+ in Figure 3) can be connected to the combiner cabinet via a wiring harness. Thus, the positive output terminal of the external multiple high-voltage box, the first circuit breaker 741, the positive fuse, the positive high-voltage relay, and the positive interface are sequentially electrically connected, with the positive interface configured to electrically connect to the positive terminal of the battery pack. The negative output terminal of the external multiple high-voltage box (refer to B1-...B4- in Figure 3) can be connected to the combiner cabinet via a wiring harness. Thus, the negative output terminal of the external multiple high-voltage box, the second circuit breaker 743, the negative fuse, the negative high-voltage relay, and the negative interface are sequentially electrically connected, with the negative interface configured to electrically connect to the negative terminal of the battery pack. Therefore, the external multiple high-voltage box can be electrically connected to a battery pack via an electrical component assembly 14, realizing the charging and discharging functions of the battery pack. In some embodiments, the maximum current of a single cluster high-voltage box can be less than or equal to 112A.

[0031] For example, the external high-voltage box can be a cluster of four high-voltage boxes. These four high-voltage boxes can combine current through the combiner cabinet in this embodiment to charge the battery pack. The combiner cabinet in this embodiment can serve as a bridge connecting the battery pack to the outside world, allowing the battery pack to be charged and discharged.

[0032] In some embodiments, the positive electrode portion 70 and the negative electrode portion 80 are arranged along a first direction (or the width direction of the combiner cabinet). In these embodiments, arranging the positive electrode portion 70 and the negative electrode portion 80 along the first direction respectively results in a reasonable layout, a more compact structure, and a smaller footprint for the combiner cabinet.

[0033] Referring to Figure 9, the positive electrode section 70 may specifically include a positive fuse 71, a positive high-voltage relay 72, and a positive terminal interface 73. The positive fuse 71, positive high-voltage relay 72, and positive terminal interface 73 are electrically connected in sequence. The positive fuse 71 is configured to be electrically connected to the positive output terminal of an external high-voltage box, and the positive terminal interface 73 is configured to be electrically connected to the positive terminal of the battery pack. In this embodiment, the positive electrode section 70 includes a positive fuse 71, which can promptly fuse and trip when the current exceeds a specified value, thus protecting the circuit safety of the positive electrode section 70.

[0034] The electrical component assembly 14 also includes a circuit breaker 74, which includes a first circuit breaker 741. The first circuit breaker 741 is installed in the mounting cavity 12. In this embodiment, by providing the first circuit breaker 741 electrically connected to the positive terminal 70, the first circuit breaker 741 is disconnected in time when a safety problem occurs, thus protecting the circuit safety. In addition, the first circuit breaker 741 and the positive terminal 70 are arranged along a first direction, and the first circuit breaker 741 is closer to the first sidewall 13 than the positive terminal 70 and the negative terminal 80, resulting in a compact structure and reasonable layout.

[0035] Referring to Figure 8, the negative electrode section 80 may specifically include a negative fuse 81, a negative high-voltage relay 82, and a negative terminal interface 83. The negative fuse 81, negative high-voltage relay 82, and negative terminal interface 83 are electrically connected in sequence. The negative fuse 81 is configured to be electrically connected to the negative output terminal of an external high-voltage box, and the negative terminal interface 83 is configured to be electrically connected to the negative terminal of the battery pack. In this embodiment, the negative electrode section 80 includes a negative fuse, which can promptly melt and break when the current exceeds a specified value, thus protecting the circuit safety of the negative electrode section 80. Since separate fuses are provided for both the positive electrode section 70 and the negative electrode section 80, both sections can be protected, improving circuit safety.

[0036] The circuit breaker 74 also includes a second circuit breaker 743, which is installed within the mounting cavity 12. The second circuit breaker 743 is electrically connected to the negative terminal 80 and is arranged along a first direction with the negative terminal 80. In this embodiment, by providing the second circuit breaker 743 electrically connected to the negative terminal 80, the second circuit breaker 743 can be promptly disconnected in case of a safety issue, protecting the circuit safety. Furthermore, the second circuit breaker 743 can be positioned closer to the first sidewall 13 than the positive terminal 70 and the negative terminal 80.

[0037] Specifically, the first circuit breaker 741, positive fuse 71, positive high-voltage relay 72, and positive terminal interface 73 are sequentially electrically connected. The positive terminal interface is configured to be electrically connected to the positive terminal of the battery pack, and the first circuit breaker 741 is configured to be electrically connected to the positive output terminal of the external high-voltage box. Similarly, the second circuit breaker 743, negative fuse 81, negative high-voltage relay 82, and negative terminal interface 83 are sequentially electrically connected. The negative terminal interface is configured to be electrically connected to the negative terminal of the battery pack, and the second circuit breaker 743 is configured to be electrically connected to the negative output terminal of the external high-voltage box. In this embodiment, the first circuit breaker 741 and the second circuit breaker 743 are configured to achieve the opening and closing of the overall high-voltage circuit. Specifically, the first circuit breaker 741 is mainly configured to achieve the opening and closing of the positive terminal portion, and the second circuit breaker 743 is mainly configured to achieve the opening and closing of the negative terminal portion. Through the cooperation of the first circuit breaker 741 and the second circuit breaker 743, the opening and closing of the overall high-voltage circuit can be achieved.

[0038] If only the positive terminal 70 has a first circuit breaker 741, even if the first circuit breaker 741 is disconnected, in certain situations, such as reverse connection or lightning strikes, the negative terminal of the battery pack may become high-voltage, potentially damaging the battery pack through the negative terminal and creating a safety hazard. If only the negative terminal 80 has a second circuit breaker 743, even if the second circuit breaker 743 is disconnected, the positive terminal 70 may still be under high voltage, potentially creating a safety hazard. In this embodiment, the positive output terminal of the high-voltage box in the positive terminal 70 is connected to the first circuit breaker 741, and the negative output terminal of the high-voltage box in the negative terminal 80 is connected to the second circuit breaker 743, providing further protection for the circuit.

[0039] In this embodiment, fuses are provided in both the positive electrode 70 and the negative electrode 80, and circuit breakers are connected to both the positive electrode 70 and the negative electrode 80, thus protecting both the positive electrode 70 and the negative electrode 80 and ensuring high circuit safety. The first electrical component assembly 14 also includes a first copper busbar 701 and a second copper busbar 801. The positive electrode 70 is electrically connected to the positive output terminal of the external high-voltage box through the first copper busbar 701, and the negative electrode 80 is electrically connected to the negative output terminal of the external high-voltage box through the second copper busbar 801, resulting in less heat generation.

[0040] The first copper busbar 701 can be installed on the first layer plate 21, and the second copper busbar 801 can be installed on the first layer plate 21. The second copper busbar 801 and the first copper busbar 701 are spaced apart, so that the first copper busbar 701 can be connected to the positive terminal 70 and the positive output terminal of the external high voltage box respectively, and the second copper busbar 801 can be connected to the negative terminal 80 and the negative output terminal of the external high voltage box respectively, resulting in a compact structure.

[0041] In some embodiments, the first copper busbar 701 may specifically include a cluster high-voltage positive terminal connection copper busbar 75 and a cluster high-voltage positive terminal to circuit breaker copper busbar 76. The second copper busbar 801 may specifically include a cluster high-voltage negative terminal connection copper busbar 85 and a cluster high-voltage negative terminal to circuit breaker copper busbar 86. The positive output terminal of the high-voltage box can be connected to the cluster high-voltage positive terminal connection copper busbar 75 via a wiring harness, and then connected to the first circuit breaker 741 via the cluster high-voltage positive terminal to circuit breaker copper busbar 76. The first circuit breaker 741 is electrically connected to the positive fuse 71 via the circuit breaker to output positive copper busbar 77. The positive fuse 71 is connected to the positive high-voltage relay 72 via a copper busbar. The positive high-voltage relay 72 is connected to the positive output harness via the output harness copper busbar, and the positive output harness is connected to a positive terminal interface 73. The first circuit breaker 741 to output positive copper busbar 77 can be installed on the side of the second shelf 23 facing the cabinet door 11.

[0042] The negative output terminal of the high-voltage box is connected to the high-voltage negative terminal busbar 85 via a wiring harness, and then connected to the second circuit breaker 743 via the high-voltage negative terminal busbar 86. The negative output busbar 87 is electrically connected to the negative fuse 81, which is connected to the negative high-voltage relay 82 via a busbar. The negative high-voltage relay 82 is connected to the negative output wiring harness via a busbar, and the negative output wiring harness is connected to the negative terminal interface 83. The circuit breaker to negative output busbar 87 can be installed on the third shelf 25 facing the cabinet door 11.

[0043] Referring to Figure 7, in order to protect the fuse and relay and prevent excessive charging current at the moment of direct power-on, and to avoid damage to the fuse and relay and other switching devices that may be caused by excessive instantaneous current, a pre-charging resistor 91 can also be provided. The pre-charging resistor 91 is installed on the side of the first layer plate 21 facing the second layer plate 23.

[0044] In some embodiments, the circuit breaker 74 (including the first circuit breaker 741 and the second circuit breaker 743) may be installed on the first shelf 21 near the cabinet door 11, the positive terminal 70 may be installed on the second shelf 23 near the cabinet door 11, and the negative terminal 80 may be installed on the third shelf 25 near the cabinet door 11. In these embodiments, multiple shelves 20 are provided, and by installing the circuit breaker 74, the positive terminal 70, and the negative terminal 80 on different shelves, the circuit breaker 74, the positive terminal 70, and the negative terminal 80 are arranged along a first direction.

[0045] In some embodiments, in addition to the positive electrode portion 70 and the negative electrode portion 80, the electrical component assembly 14 also includes a control portion 100. The control portion 100 is installed in the mounting cavity 12 and is configured to be electrically connected to the positive electrode portion 70, the negative electrode portion 80 and the battery pack. The control portion 100 is also configured to be electrically connected to the communication signal terminal of the external high-voltage box to detect the status of the external high-voltage box and the battery pack.

[0046] In related technologies, energy storage systems typically include combiner cabinets that exist as independent equipment cabinets. These combiner cabinets connect to an external high-voltage box, but their function is relatively simple. To control the input or output current and voltage, another independent electrical control cabinet is needed, which occupies a large space. In the embodiments of this invention, the electrical component assembly 14 installed inside the cabinet includes a positive terminal, a negative terminal, and a control unit. The external high-voltage box can be connected to the positive and negative terminals of the battery pack through the positive and negative terminals, respectively, to achieve current connection. The control unit provides electrical connection to the communication signal terminal of the external high-voltage box, enabling the detection of the status of the external high-voltage box and the battery pack, thus enriching the functionality of the combiner cabinet. Furthermore, compared to the related technologies where the control unit is located in a separate cabinet and the positive and negative terminals are located in another separate cabinet, in the embodiments of the present invention, the control unit, the positive terminal, and the negative terminal are all located inside the same cabinet. The control unit and the positive terminal are arranged along the length or width of the combiner cabinet, reducing the use of one cabinet and making the structure between the control unit and the positive and negative terminals more compact.

[0047] In this embodiment, a control unit 100 is housed within a cabinet. The control unit 100 is electrically connected to the communication signal terminal of an external high-voltage box, thus providing the following functions: First, the communication signal terminal of the external high-voltage box can supply power to the control unit. Second, the communication signal terminal of the external high-voltage box can monitor the status of the external high-voltage box and battery pack in real time. If the high-voltage box malfunctions, feedback can be sent to the combiner cabinet via the communication signal terminal, which in turn sends feedback to the control panel. Third, the communication signal terminal can monitor and provide feedback on the battery pack's status in real time, including the battery system's operating voltage, operating current, remaining capacity, and remaining battery life. Compared to related technologies where energy storage systems typically include separate control cabinets and combiner cabinets in the form of independent equipment cabinets, the combiner cabinet provided in this embodiment offers richer functionality, a more compact structure, and occupies less space.

[0048] It should be noted that the high-voltage box outside the combiner cabinet may specifically include a positive output terminal, a negative output terminal, and a communication signal terminal. The side wall of the cabinet may have an inlet port 90 for connecting external wiring harnesses. The inlet port 90 specifically includes a positive inlet port, a negative inlet port, and a communication inlet port. The high-voltage wiring harness connected to the high-voltage box can be installed at the inlet port 90 using a gland connector. Locking the wiring harness through the gland connector improves the cabinet's protection level and prevents foreign objects and moisture from entering the combiner cabinet, causing malfunctions and short circuits.

[0049] The communication signal terminal enters the cabinet through a communication inlet located on the side wall of the cabinet, and then connects to the BMS control unit 31. The positive output terminal of the external high-voltage box enters the cabinet through a positive inlet located on the side wall of the cabinet, connects to the first copper busbar 701, and is connected to the first circuit breaker 741. The negative output terminal enters the cabinet through a negative inlet located on the side wall of the cabinet, connects to the second copper busbar 801, and is connected to the second circuit breaker 743.

[0050] In some embodiments, the control unit 100 and the positive electrode unit 70 can be arranged along the length of the combiner cabinet, and the positive electrode unit 70 and the negative electrode unit 80 can be arranged along the width of the combiner cabinet, i.e., the first direction, thereby making the structure more compact and occupying less space.

[0051] In some embodiments, the control unit 100 includes a first sub-control unit 101 and a second sub-control unit 103, with the first sub-control unit 101, the positive electrode portion 70, and the second sub-control unit 103 arranged sequentially along the length of the combiner cabinet. In these embodiments, the control unit 100 is configured as two groups, with the first sub-control unit 101 and the second sub-control unit 103 located on both sides of the positive electrode portion 70 and the negative electrode portion 80. Specifically, the first sub-control unit 101 can be installed on the second side wall 15, and the second sub-control unit 103 can be installed on the third side wall 17.

[0052] In some embodiments, the second sub-control unit 103 of the control unit 100 includes a BMS control unit 31, which is configured to be electrically connected to the communication signal terminal of an external high-voltage box, and is electrically connected to the positive terminal 70 and the negative terminal 80 respectively.

[0053] In some embodiments, the electrical component assembly 14 further includes an adjustment indicator 200, which is installed on the side of the cabinet door 11 away from the mounting cavity 12. The adjustment indicator 200 is electrically connected to the BMS control unit 31 and is configured to adjust and indicate the operating conditions of the battery pack.

[0054] In this embodiment of the application, there may be multiple sets of electrical component assemblies 14. The specific structure of the electrical component assemblies 14 has been described above. Each electrical component assembly 14 includes the above-mentioned positive electrode part 70, negative electrode part 80, control part, etc., and its specific contents will not be repeated here.

[0055] An electrical component assembly 14 can be configured to be electrically connected to an external multi-cell high-voltage box and to be electrically connected to a battery pack. Multiple electrical component assemblies 14 are arranged from top to bottom along the height of the combiner cabinet. Thus, a combiner cabinet according to this embodiment can simultaneously meet the charging needs of multiple battery packs, with a small footprint, ease of use, and lower cost.

[0056] In an embodiment of the present invention, an electrical component assembly 14 is configured to be electrically connected to an external multi-cluster high-voltage box and to a battery pack, thereby enabling the electrical component assembly 14 to combine current with the external multi-cluster high-voltage box. After the external multi-cluster high-voltage box combines current through the electrical component assembly 14, it charges and discharges the battery pack. Multiple sets of electrical component assemblies 14 are provided in a cabinet and configured to be electrically connected to multiple battery packs, thereby meeting the current combining requirements of multiple battery packs and improving the situation in related technologies where combiner cabinets are unable to meet the current combining requirements of multiple battery packs.

[0057] In some embodiments, for ease of description, the multiple battery packs include at least a first battery pack and a second battery pack, and the multiple electrical component assemblies 14 include at least a first electrical component assembly 14 and a second electrical component assembly 14. The mounting cavity of the cabinet includes a first mounting cavity 121 and a second mounting cavity 123 arranged from top to bottom along the height direction of the junction box;

[0058] The first electrical component assembly 14 is installed in the first mounting cavity 121. The first electrical component assembly 14 is electrically connected to an external high-voltage box and a first battery pack. The external high-voltage box can be multi-cell. The second electrical component assembly 14 is installed in the second mounting cavity 123. The second electrical component assembly 14 is electrically connected to an external high-voltage box and a second battery pack. The external high-voltage box can be multi-cell.

[0059] In some embodiments, a single battery pack can be connected to four high-voltage boxes, and there are eight high-voltage boxes externally. The first electrical component assembly 14 can combine the current from the four external high-voltage boxes to charge the first battery pack; the second electrical component assembly 14 can combine the current from the other four external high-voltage boxes to charge the second battery pack. In this embodiment, a single combiner cabinet can simultaneously meet the high-voltage combining and low-voltage control needs of two or more battery packs, resulting in a small footprint, ease of use, and lower cost.

[0060] Referring to Figure 4, the first mounting cavity 121 may include a first mounting space 1211 and a second mounting space 1213 arranged along the height direction of the junction box. Specifically, in the first mounting cavity 121, along the width direction of the junction box, at least a portion of the projection of the first shelf 21 onto the cabinet door (or first side wall) is located above the projection of the second shelf 23 onto the cabinet door 11 (or first side wall). Along the width direction of the junction box, at least a portion of the projection of the first shelf 21 onto the cabinet door is located above the projection of the third shelf 25 onto the cabinet door 11. Thus, at least a portion of the first shelf 21 can directly face the cabinet door 11, forming the first mounting space 1211.

[0061] A portion of the first shelf 21, the second shelf 23, and the third shelf 25 form a second mounting space 1213. Specifically, the second mounting space 1213 may include a first sub-mounting cavity, a second sub-mounting cavity, and a third sub-mounting cavity. A portion of the first shelf and the second shelf 23 define the first sub-mounting cavity; the second shelf 23 and the third shelf 25 define the second sub-mounting cavity; and the third shelf 25 and the cabinet door define the third sub-mounting cavity. At least a portion of the first circuit breakers 741 are installed in the first mounting space 1211, and at least a portion of the second circuit breakers 743 are installed in the first mounting space 1211.

[0062] The specific implementation is as follows: the opposite sides of the first layer 21 can be connected to the second and third side walls respectively, for example, by welding or screwing; the opposite sides of the second layer 23 can be connected to the second and third side walls respectively, for example, by welding or screwing; and the opposite sides of the third layer 25 can be connected to the second and third side walls respectively, for example, by welding or screwing. In this way, the first layer 21, the second layer 23, and the third layer 25 are installed in the cabinet. The structure is more compact, reducing the cabinet volume and space occupied.

[0063] In the second mounting cavity 123, the specific positional relationship of the first layer plate 21, the second layer plate 23 and the third layer plate 25 can be referred to as their specific positional relationship in the first mounting cavity 121.

[0064] In some embodiments, each electrical component assembly 14 includes the aforementioned positive electrode portion 70 and negative electrode portion 80. The positive electrode portion 70 is configured to be electrically connected to the positive output terminal of an external high-voltage box and to the positive terminal of a battery pack; the negative electrode portion 80 is configured to be electrically connected to the negative output terminal of an external high-voltage box and to the negative terminal of the battery pack. Thus, one electrical component assembly 14 can correspond to one battery pack, and multiple electrical component assemblies 14 can correspond to multiple battery packs, with a one-to-one correspondence between the electrical component assembly 14 and the battery pack.

[0065] Referring to Figure 3, since multiple high-voltage boxes can be connected, the overcurrent capacity of a single positive interface paired with a single negative interface is insufficient for the application requirements. Therefore, multiple positive terminals 70 and multiple negative terminals 80 are provided, with a one-to-one correspondence between the positive terminals 70 and the negative terminals 80. That is, each electrical component assembly 14 includes multiple positive terminals 70 and multiple negative terminals 80. Consequently, each electrical component assembly 14 includes multiple positive interfaces (refer to charging socket 1DC+ and charging socket 2DC+ in Figure 3) and multiple negative interfaces (refer to charging socket 1DC- and charging socket 2DC- in Figure 3). The positive and negative interfaces are in a one-to-one correspondence, and a positive interface and a negative interface together form a charging / discharging interface. The multiple positive terminals 70 are electrically connected to the positive terminal of a battery pack, and the multiple negative terminals 80 are electrically connected to the negative terminal of the battery pack. By providing multiple positive terminals 70 and multiple negative terminals 80, a larger current can be provided to the battery pack.

[0066] In some implementations, since the maximum input current of the four-cluster high-voltage box is about 448A, and the overcurrent capacity of a single charge / discharge interface is about 250A, two positive terminals 70 and two negative terminals 80 are provided to share the current in order to meet the overcurrent requirements.

[0067] In some embodiments, for ease of use and to distinguish between the two battery packs, the control unit 100 includes a control unit in each electrical component assembly 14. The control unit is configured to be electrically connected to the electrical component assembly 14 and to the battery pack. The control unit is also configured to be electrically connected to the communication signal terminal of an external high-voltage box to detect the status of the external high-voltage box and the battery pack. Thus, one control unit controls one battery pack, ensuring accurate control.

[0068] In some embodiments, the control unit may include a first control unit and a second control unit. The first control unit is installed in the first mounting cavity 121, and the second control unit is installed in the second mounting cavity 123. The first control unit is electrically connected to the first battery pack and the first electrical component assembly 14, respectively, and detects the status of the external high-voltage box and the first battery pack. The second control unit is electrically connected to the second battery pack and the second electrical component assembly 14, respectively, and detects the status of the external high-voltage box and the second battery pack.

[0069] The first and second control units control the first and second battery packs separately, respectively, so that the control units of the two battery packs are independent of each other and do not interfere with each other, thereby reducing the failure rate and improving control accuracy.

[0070] In some embodiments, each electrical component assembly 14 includes a control unit comprising two parts, a first sub-control unit 101 and a second sub-control unit 103 electrically connected. Along the length of the cabinet, the first sub-control unit and the second sub-control unit are located on both sides of the cabinet, specifically, they may be installed on the second side wall and the third side wall respectively.

[0071] Specifically, a second sub-control unit is installed on the third side wall of the cabinet, facing the second side wall. A first sub-control unit is installed on the left side of the cabinet, facing the third side wall.

[0072] In some embodiments, along the width direction of the junction box, the projection of the first sub-control unit 101 on the first side wall is located above the projection of the second layer plate on the first side wall.

[0073] In some embodiments, the projection of the second sub-control unit 103 on the first side wall is located above the projection of the second shelf on the cabinet door.

[0074] In some embodiments, along the width direction of the junction box, the projection of the first sub-control unit 101 on the first side wall is located above the projection of the second shelf on the first side wall. Simultaneously, the projection of the second sub-control unit on the first side wall is located above the projection of the second shelf on the cabinet door.

[0075] Referring to Figures 5 and 6, the first sub-control unit is configured as a control indicator module 41 and a switch module 43. The first sub-control unit may include: a signal relay 33, an air switch 35, a cable tray 36, a terminal block 37, an AC / DC power supply 38, etc. The second sub-control unit 103 may include: a BMS control unit 31. The communication signal terminal can be powered by the AC / DC power supply in the combiner cabinet.

[0076] Specifically, in the first installation space 1211, a first bracket plate can be installed on the side of the second side wall of the cabinet facing the third side wall of the cabinet. A first sub-control unit is installed on the first bracket plate and is also installed on the second side wall via the first bracket plate. A second bracket plate can be installed on the side of the third side wall of the cabinet facing the second side wall of the cabinet. A second sub-control unit is installed on the second bracket plate and is also installed on the third side wall via the bracket plate.

[0077] In some specific embodiments, the BMS controller 31 is mounted on the second bracket plate, configured to manage the batteries, and is also mounted on the third side wall via the second bracket plate. The communication signal terminal of the external high-voltage box can enter the combiner cabinet through the inlet and then connect to the BMS controller 31. The BMS battery management system is also configured in multiple groups, with one BMS battery management system configured to control one group of battery systems. In some embodiments, the battery systems are configured in two groups, and the BMS battery management systems are configured in two groups, thereby enabling separate management of the two groups of battery systems.

[0078] Specifically, a guide rail can be mounted on the first bracket plate. The terminal block 37, signal relay 33, and air switch 35 are all mounted on the guide rail and are snap-fitted to the guide rail. The AC / DC power supply 38 is mounted on the first bracket plate.

[0079] In some specific embodiments, the indicator lights and switches can be installed on the cabinet door and located on the outside of the cabinet door on the side away from the mounting cavity. The indicator lights and switches are connected to the terminal block via a wiring harness, and the terminal block is then connected to the signal relay and the air switch via the wiring harness. The wiring harness can be converged in the cable tray and connected to the BMS control unit 31. The BMS control unit 31 then outputs signals to the driver's console via the wiring harness.

[0080] In some embodiments, each first electrical component assembly 14 further includes an auxiliary power section, which can be installed on the second layer plate 23 and the third layer plate 25. The auxiliary power section 300 includes an auxiliary positive fuse 301, an auxiliary negative fuse 303, an auxiliary positive terminal interface 305, and an auxiliary negative terminal interface 307. The auxiliary positive fuse 301 and the auxiliary positive terminal interface 305 can be installed on the second layer plate 23, and the auxiliary negative fuse and the auxiliary negative terminal interface 307 can be installed on the third layer plate 25. The first circuit breaker 741, the auxiliary positive fuse 301, and the auxiliary positive terminal interface 305 are connected in sequence, and the auxiliary positive terminal is configured to be electrically connected to the positive terminal of the auxiliary power supply cabinet.

[0081] The second circuit breaker 743, the auxiliary power negative fuse 303, and the auxiliary power negative terminal interface 307 are connected in sequence, and the auxiliary power negative terminal is configured to be electrically connected to the negative terminal of the auxiliary power supply cabinet.

[0082] The auxiliary power positive interface 305 and auxiliary power negative interface 307 are configured to connect to the auxiliary power cabinet and can also charge the auxiliary power cabinet. In addition, auxiliary power positive fuse 301 and auxiliary power negative fuse 303 are provided to meet the requirement of individual fuse arrangement for each circuit.

[0083] Specifically, the positive output terminal of the high-voltage box is connected to the high-voltage positive terminal copper busbar via a wiring harness, and then connected to the circuit breaker copper busbar via the high-voltage positive terminal. The circuit breaker is connected to the auxiliary positive fuse 301, and the auxiliary positive fuse 301 is connected to the auxiliary positive output wiring harness via the auxiliary positive copper busbar. The auxiliary positive output wiring harness is connected to the auxiliary positive terminal interface 305.

[0084] The negative output terminal of the high-voltage box is connected to the high-voltage negative terminal copper busbar via a wiring harness, and then connected to the circuit breaker copper busbar via the high-voltage negative terminal. The circuit breaker is connected to the auxiliary negative fuse 303. The auxiliary negative fuse 303 is connected to the auxiliary negative output wiring harness via the auxiliary negative copper busbar. The auxiliary negative output wiring harness is connected to the auxiliary negative terminal interface 307.

[0085] In some embodiments, each first electrical component assembly 14 further includes a surge protection unit 400, which can be mounted on the second layer 23. The surge protection unit 400 includes a first surge fuse 401, a surge protector 405, and a second surge fuse 403. The first circuit breaker 741, the first surge fuse, the surge protector, the second surge fuse, and the second circuit breaker 743 are sequentially electrically connected to form a surge protection circuit. By providing a surge protection circuit, the equipment is configured to prevent damage from lightning strikes.

[0086] Specifically, the first circuit breaker 741 is electrically connected to the positive output copper busbar, and the second circuit breaker 743 is electrically connected to the negative output copper busbar. One end of the first surge fuse is connected to the positive output copper busbar via a wiring harness, thus electrically connecting the first surge fuse to the first circuit breaker 741. The other end of the first surge fuse is connected to a surge protector, and one end of the surge protector is connected in series via a wiring harness to the second surge fuse. The second surge fuse is then connected to the negative output copper busbar via a wiring harness, thus electrically connecting the second surge fuse to the second circuit breaker 743. The positive output copper busbar can be installed on the side of the second shelf 23 facing the cabinet door. The negative output copper busbar can be installed on the side of the third shelf 25 facing the cabinet door.

[0087] In some embodiments, guide rails and insulating posts can be mounted on the second layer plate 23. The guide rails are configured to fix the surge protectors, thereby improving installation efficiency and stability. The first surge fuse and the second surge fuse are fixed on the insulating posts of the support plate.

[0088] Referring to Figure 8, in some embodiments, the shelf can be provided with an inspection hole. The inspection hole can be a waist-shaped inspection hole 201, which allows for direct reinforcement without disassembling the outer shelf closer to the cabinet door in case of loose wiring harness; thus facilitating reinforcement and maintenance.

[0089] In some embodiments, the shelf can be covered with a PC film to improve insulation performance. Specifically, the side of the shelf facing the cabinet door can be covered with a PC film.

[0090] In some embodiments, an insulating plate 603 may be installed on the side facing away from the cabinet door to increase the electrical clearance between the copper busbars and improve insulation performance. The insulating plate 603 may be an acrylic insulating plate.

[0091] In some embodiments, each first electrical component assembly 14 further includes an adjustment indicator mounted on the side of the cabinet door away from the mounting cavity, configured to adjust and indicate the operating conditions of a battery pack.

[0092] The adjustment indicator 200 may include a first operation module 40, a second operation module 50, and a warning module 60, which are arranged sequentially from top to bottom along the height of the cabinet.

[0093] The first operation module is configured to display and control the operating status of the first battery pack, and the second operation module is configured to display and control the operating status of the second battery pack.

[0094] In this embodiment, because the control unit arranges the first and second battery packs in groups, it can intuitively identify which battery pack the fault originates from when a fault occurs. Simultaneously, it can promptly cut off the input and output of the battery packs to prevent further losses. This enables status monitoring of the high-voltage boxes of both battery packs and allows for the integration and output of the overall communication between the two battery systems to the control console.

[0095] The first operation module 40 will be described next. The first operation module 40 includes: an indicator light module 41, a switch module 43, a buzzer 45, and a display module 47. The first operation module 40 provides timely feedback and control of the status of the first battery pack. The indicator light module 41 and the switch module 43 are electrically connected to the control unit.

[0096] The display module is located on the side where the cabinet door connects to the cabinet body, and on the other side where the cabinet door connects to the cabinet body. The indicator light module is located on one side of the display module and is spaced apart from the display module.

[0097] The indicator light module 41 may include a running indicator light 411, a fault indicator light 413, a closing indicator light 415, an over-temperature indicator light 412, a 24V voltage indicator light 414, and a low SOC indicator light 416. The indicator light module is arranged in two parallel rows. The first row includes the running indicator light, the fault indicator light, and the closing indicator light, while the second row includes the over-temperature indicator light, the 24V power supply indicator light, and the low SOC indicator light. Arranging the indicator light modules in two parallel rows results in a compact structure between the first and second rows, facilitating operation by the operator.

[0098] The switch module 43 may include: a remote / local control switch 431, a start / stop control switch 433, and a mute control switch 435. The remote / local control switch 431, start / stop control switch 433, and mute control switch 435 are arranged in a row, configured to run parallel to the indicator light modules. Thus, the indicator light modules 41 and switch modules 43 are arranged parallel to each other, from top to bottom: the first row of indicator light modules 41, the second row of indicator light modules 41, and the switch modules 43. The switch modules and indicator light modules are relatively compact. The first row of indicator light modules is positioned higher than the display module 47. An installation space is provided between the first row of indicator light modules and the display module, where the buzzer and emergency stop switch 437 are installed for easy operation and to prevent accidental activation. The buzzer is positioned close to the first row of indicator light modules, above the display module. The emergency stop switch is located between the buzzer and the display module 47.

[0099] Display module 47 is installed on the cabinet door and configured to display relevant parameters and operating conditions. Display module 47 is arranged separately for the first battery pack and the second battery pack, with the two display modules 47 operating independently and without interference. The two sets of display modules 47 on the cabinet door allow for monitoring of the battery status of the two battery systems separately. In some embodiments, both sets of display modules 47 may be touch screens.

[0100] The structure and function of the second operation module can be referenced from that of the first operation module. The second operation module is configured to display and control the operating status of the second battery pack. Both the first and second operation modules can be opened separately to reveal their internal structures. Simultaneously, the cabinet door can also be opened entirely; once the cabinet lock is opened, the door can be opened entirely from the handle.

[0101] The warning module 60 includes an identification element and a cabinet lock. The ventilation element is located near the bottom of the cabinet door, and the identification element is positioned between the ventilation element, the cabinet lock, and the second operating module. The cabinet lock is configured to lock the cabinet door and the cabinet body. The identification element can be a high-voltage warning sign.

[0102] In this embodiment, the low-voltage indicator light and control switch are arranged separately using the first battery pack and the second battery pack. The low-voltage indicator light and control switch of each battery pack are independent of each other and do not interfere with each other, so that the charging and discharging of the two battery packs can be controlled separately.

[0103] To improve heat dissipation, in this embodiment, the junction box can employ ventilation for heat dissipation. In some embodiments, the top of the cabinet 10 has an air outlet 1010, and the cabinet door has an air inlet 1030. The air inlet and outlet are respectively connected to the mounting cavity 12. The air outlet assembly is configured to discharge the gas in the mounting cavity 12 to the air outlet 1010. The electrical component assembly 14 is installed in the mounting cavity 12 and configured to combine multiple external high-voltage boxes. At least a portion of the electrical component assembly 14 is located in the air path between the air inlet and the air outlet. In these embodiments, air enters the cabinet through the air inlet. When the electrical component assembly 14 is working, it generates heat, and the heated air rises. Passing through the electrical component assembly 14, the hot air emitted by the electrical component assembly 14 can be effectively discharged upwards, preventing high temperature accumulation that could lead to malfunction of the electrical component assembly 14. The air inlet 1030 can be located near the bottom wall 19 of the cabinet door.

[0104] In this embodiment, bottom air intake and top air exhaust facilitate the removal of more hot air, thus improving heat dissipation. The air carries away the heat generated by the electrical component assembly 14 and exhausts it from the top of the cabinet; top air exhaust further facilitates the removal of more hot air and improves heat dissipation.

[0105] In some embodiments, the junction box further includes an air outlet assembly installed within the mounting cavity 12 and positioned near the top of the cabinet. The air outlet assembly is configured to exhaust gas from the cabinet body 10 through the air outlet 1010. Positioning the air outlet assembly and air outlet 1010 at the top improves heat dissipation efficiency.

[0106] In some embodiments, the air outlet assembly includes a fan, a first filter 601, and a second filter 602. The fan is configured to draw air into the cabinet to dissipate heat from the internal components and to exhaust gas from the mounting cavity through the air outlet, i.e., to the outside. The first filter 601 is installed on the cabinet 10 and configured to cover the air outlet 1010. The air inlet assembly includes the second filter 602, which is installed on the cabinet door and configured to cover the air inlet. The second filter 602 covers the air inlet, thereby preventing external air from carrying particulate matter into the cabinet and adversely affecting the electrical component assembly 14. The first filter 601 covers the air outlet to prevent external dust from entering the cabinet through the air outlet. The fan can be a Roots blower, a centrifugal fan, an axial flow fan, a vane blower, etc., and this application does not limit this type.

[0107] Both the first filter 601 and the second filter 602 can be louvered filters. The fan can include a louvered fan. The louvered fan is connected to the BMS control unit 31 through a wiring harness. The program in the BMS control unit 31 controls the opening and closing of the fan to achieve ventilation and heat dissipation inside the combiner cabinet.

[0108] The air inlet can use a 323mm*323mm louvered filter assembly, and the air outlet can use two 204mm*204mm louvered filter assemblies paired with two 24V DC axial flow fans. The protection level can reach IP55, and the air flow rate can reach 98m³ / h.

[0109] In some embodiments, the louvered fan can be connected to the BMS control unit 31 via a wiring harness, and the program in the BMS control unit 31 controls the fan to open and close, thereby achieving ventilation and heat dissipation inside the combiner cabinet.

[0110] In some embodiments, the shelf is configured to mount electrical component assembly 14 on the side facing the air inlet; along a first direction, at least a portion of the projection of the electrical component assembly 14 on the cabinet door is located above the air inlet, and / or, at least a portion of the projection of the electrical component assembly 14 on the cabinet door is located inside the air inlet.

[0111] Therefore, the air entering through the air inlet can pass through the electrical component assembly 14 on the shelf, resulting in better heat dissipation.

[0112] In some embodiments, multiple shelves may each have through holes extending along a first direction. In these embodiments, each shelf has through holes extending along the first direction. The through holes can be configured to install electrical component assemblies 14 or for maintenance. After external air enters the space between the third shelf 25 and the cabinet door through the air inlet, it can enter the space between the second shelf 23 and the third shelf 25 through the through holes, and it can also enter the space between the first shelf 21 and the second shelf 23 through the through holes, which helps with heat dissipation.

[0113] In this embodiment, after the external gas enters the cabinet, it can be divided into at least two paths. One path enters between the first shelf 21 and the second shelf 23, carrying away the heat of some of the first electrical component assembly 14 installed on the first shelf 21. The other path enters between the second shelf 23 and the cabinet door, carrying away the heat of some of the first electrical component assembly 14 installed on the second shelf 23, and is discharged through the air outlet provided on the top wall. In other words, the first electrical component assembly 14 is cooled by two paths of gas at the same time, resulting in high heat dissipation efficiency.

[0114] In some embodiments, along the first direction, at least a portion of the projection of the first shelf 21 onto the cabinet door is located above the projection of the second shelf 23 onto the cabinet door. That is, at least a portion of the first shelf 21 can directly face the cabinet door to form a cavity, and this cavity is located above the second shelf 23 and the third shelf 25. In other words, at least a portion of the first shelf 21 is not separated from the cabinet door by the second shelf and the third shelf 25. Thus, the gas entering between the first shelf 21 and the second shelf and the gas entering between the second shelf and the cabinet door can converge at the cavity formed by the first shelf 21 directly facing the cabinet door, which allows the gas to be fully discharged from the air outlet, which is beneficial for heat dissipation.

[0115] Air outlet 1010 is located on the top wall 18, and at least part of the projection of the second layer plate 23 on the top wall 18 is located within the air outlet 1010 along the height direction of the junction box. This facilitates the airflow from the air outlet.

[0116] In some embodiments, the cabinet also includes an insulating plate 603, with at least one shelf having an insulating plate 603 mounted on the side facing away from the cabinet door. This increases the electrical clearance between electrical component assemblies 14, such as copper busbars, improving heat dissipation and insulation performance.

[0117] Secondly, embodiments of this application also provide an energy storage system, which includes a combiner cabinet as described in any of the above embodiments.

Claims

1. A combiner cabinet, comprising: Cabinet (10); Electrical component assembly (14) is installed inside the cabinet (10). There are multiple sets of electrical component assembly (14). The multiple sets of electrical component assembly (14) are configured to be electrically connected to multiple sets of battery packs. The multiple sets of electrical component assembly (14) are arranged from top to bottom along the height direction of the combiner cabinet. Each electrical component assembly (14) is configured to be electrically connected to multiple external high-voltage boxes and to be electrically connected to a battery pack.

2. The combiner cabinet according to claim 1, wherein, Each of the electrical component assemblies (14) includes a positive electrode portion (70) and a negative electrode portion (80). The positive electrode portion (70) is configured to be electrically connected to the positive output terminal of an external high-voltage box and to the positive electrode of a battery pack. The negative electrode portion (80) is configured to be electrically connected to the negative output terminal of an external high-voltage box and to the negative electrode of the battery pack.

3. The combiner cabinet according to claim 2, wherein, It also includes a cabinet door (11), which is connected to the cabinet body (10) and configured to open and close the cabinet body (10). The cabinet body (10) includes a first side wall (13) that is disposed opposite to the cabinet door (11). The arrangement direction of the cabinet door (11) and the first side wall (13) is a first direction. The positive electrode part (70) and the negative electrode part (80) are arranged along the first direction.

4. The combiner cabinet according to claim 2, wherein, Each of the electrical component assemblies (14) includes a plurality of positive electrode portions (70) and a plurality of negative electrode portions (80), with one positive electrode portion (70) and one negative electrode portion (80) correspondingly disposed. The plurality of positive electrode portions (70) are respectively electrically connected to the positive electrode of a battery pack, and the plurality of negative electrode portions (80) are respectively electrically connected to the negative electrode of the battery pack.

5. The combiner cabinet according to claim 2, wherein, Each of the electrical component assemblies (14) includes a control unit (100) configured to be electrically connected to the positive electrode (70), the negative electrode (80) and the battery pack respectively. The control unit (100) is also configured to be electrically connected to the communication signal terminal of the external high-voltage box to detect the status of the external high-voltage box and the battery pack.

6. The combiner cabinet according to any one of claims 1 to 5, wherein, Each of the electrical component assemblies (14) further includes an auxiliary power section (300), which includes an auxiliary power positive fuse (301), an auxiliary power negative fuse (303), an auxiliary power positive terminal interface (305), and an auxiliary power negative terminal interface (307). The auxiliary power positive fuse (301) and the auxiliary power positive interface (305) are connected in sequence, and the auxiliary power positive interface (305) is configured to be electrically connected to the positive terminal of the auxiliary power cabinet. The auxiliary power negative fuse (303) and the auxiliary power negative terminal interface (307) are connected in sequence, and the auxiliary power negative terminal interface (307) is configured to be electrically connected to the negative terminal of the auxiliary power cabinet.

7. The combiner cabinet according to any one of claims 1 to 5, wherein, Each of the electrical component assemblies (14) further includes a surge protection unit (400), which includes a first surge fuse (401), a surge protector (405), and a second surge fuse (403), wherein the first circuit breaker (741), the first surge fuse (401), the surge protector (405), the second surge fuse (403), and the second circuit breaker (743) are electrically connected in sequence.

8. The combiner cabinet according to claim 3, wherein, Each of the electrical component assemblies (14) further includes an adjustment indicator (200) installed on the side of the cabinet door (11) away from the cabinet body (10), and configured to adjust and indicate the operating conditions of a battery pack.

9. The combiner cabinet according to claim 8, wherein, Each of the adjustment indicator units (200) includes an indicator light module (41) and a switch module (43), which are electrically connected to the control unit (100).

10. An energy storage system comprising a combiner cabinet as described in any one of claims 1 to 9.

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