Convergence cabinet and energy storage system

Abstract

The utility model provides a confluence cabinet and an energy storage system, the confluence cabinet comprises a cabinet body and a plurality of groups of electrical component assemblies, the electrical component assemblies are installed in the cabinet body, the plurality of groups of electrical component assemblies are used for being electrically connected with a plurality of groups of battery packs, and the plurality of groups of electrical component assemblies are arranged along the height direction of the confluence cabinet from top to bottom, each electrical component assembly is used for being electrically connected with an external multi-cluster high-voltage box and a battery pack. The confluence cabinet provided by the utility model can improve the technical problem that a traditional confluence cabinet is difficult to meet the confluence requirements of a plurality of battery packs.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a combiner cabinet and an energy storage system. Background Art

[0002] In related technologies, energy storage systems typically include an electrical control cabinet and a combiner cabinet, each of which exists as an independent equipment cabinet. The combiner cabinet achieves the convergence effect, and the electrical control cabinet controls the input or output current and voltage of the combiner cabinet.

[0003] Traditional combiner cabinets can often only control one battery pack and cannot meet the combiner requirements of two battery packs. If multiple battery packs need to be controlled, multiple combiner cabinets can only be used, which brings problems such as large floor space, inconvenience in use, and high cost. Utility Model Content

[0004] The embodiments of the present invention provide a combiner cabinet and an energy storage system, which can solve the technical problem that traditional combiner cabinets are difficult to meet the combiner requirements of multiple battery groups.

[0005] In a first aspect, an embodiment of the present invention provides a combiner cabinet, comprising:

[0006] Cabinet;

[0007] An electrical component assembly is installed in the cabinet, and the electrical component assembly is divided into multiple groups. The multiple groups of electrical component assemblies are used to electrically connect to multiple groups of battery packs. The multiple groups of electrical component assemblies are arranged from top to bottom along the height direction of the junction cabinet, wherein each of the electrical component assemblies is used to electrically connect to multiple external high-voltage boxes and to electrically connect to a battery pack.

[0008] In a second aspect, an embodiment of the present invention provides an energy storage system, comprising a combiner cabinet as described in any of the above embodiments.

[0009] Beneficial effects of the embodiments of the present utility model:

[0010] In an embodiment of the present invention, an electrical component assembly is used to electrically connect to multiple external high-voltage boxes, and to electrically connect to a battery pack, thereby realizing the convergence of multiple external high-voltage boxes by an electrical component assembly. After the external high-voltage boxes converge through an electrical component assembly, they charge and discharge a battery pack. In a cabinet, multiple groups of electrical component assemblies are provided for electrical connection to multiple battery packs, thereby meeting the convergence requirements of multiple battery packs, thereby improving the technical problem that traditional convergence cabinets are difficult to meet the convergence requirements of multiple battery packs. In addition, multiple groups of electrical component assemblies are arranged from top to bottom along the height direction of the convergence cabinet, which can also make the convergence cabinet occupy a smaller area and have a more compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 This is an exploded view of a combiner cabinet provided in an embodiment of the present utility model;

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle layer board;

[0014] Figure 3 This is a circuit diagram of a combiner cabinet provided in an embodiment of the present utility model;

[0015] Figure 4 This is a three-dimensional view from a first angle of a combiner cabinet provided by an embodiment of the present invention with the cabinet door removed;

[0016] Figure 5 This is a perspective view from a second angle of the combiner cabinet provided by an embodiment of the present invention with the cabinet door removed;

[0017] Figure 6 yes Figure 1 Schematic diagram of the structure of the middle cabinet door;

[0018] Figure 7 This is a perspective view from a third angle of the combiner cabinet provided by an embodiment of the present invention with the cabinet door removed;

[0019] Figure 8 This is a perspective view from a fourth angle of the combiner cabinet provided by an embodiment of the present invention with the cabinet door removed;

[0020] Figure 9 This is a perspective view from a fifth angle of the combiner cabinet provided by an embodiment of the present invention with the cabinet door removed. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiment is only one embodiment of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0022] Please combine Figure 1 The combiner cabinet in the embodiment of the present application includes: a cabinet body 10 and a cabinet door 11.

[0023] The cabinet body 10 is formed with an installation cavity 12, and the cabinet door 11 is connected to the cabinet body 10 for revealing or covering the installation cavity 12, or for opening and closing the cabinet body 10. The shelf 20 is installed in the installation cavity 12. The cabinet door 11 can be rotatably connected to the cabinet body 10.

[0024] The cabinet body 10 may specifically include a first side wall 13, a second side wall 15, and a third side wall 17. The first side wall 13, the second side wall 15, and the third side wall 17 define the installation cavity 12, wherein the second side wall 15 and the third side wall 17 are arranged opposite each other. The first side wall 13 is arranged opposite to the cabinet door 11, and the first side wall 13 is located between the second side wall 15 and the third side wall 17. The 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] Please combine Figure 4 The cabinet further includes a top wall 18 and a bottom wall 19. As is easy to understand, the top wall 18 is located at the top of the cabinet 10, and the bottom wall 19 is located at the bottom of the cabinet. Along the height direction of the combiner cabinet, the top wall 18, the first side wall 13, and the bottom wall 19 are arranged in sequence.

[0026] 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 body), 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 body). The first direction is perpendicular to the second direction.

[0027] Please combine Figure 2The combiner cabinet also includes a shelf 20, which is installed in the cabinet's mounting cavity 12 and can be used to mount electrical components. The shelf 20 is disposed between the cabinet door 11 and the first side wall 13, and is disposed opposite the cabinet door 11. The first side wall 13, the shelf, and the cabinet door 11 can be arranged along a first direction, or the width of the combiner cabinet. Opposite sides of the shelf 20 can be connected to the second side wall 15 and the third side wall 17, respectively.

[0028] Because the electrical component assembly contains many electrical components, if they are all installed on the same plane, the cabinet will become very large. To further reduce the volume of the combiner cabinet, there can be multiple shelves 20, and the multiple shelves 20 can be arranged along the first direction or the width direction of the combiner cabinet. In some embodiments, the shelves 20 can include a first shelf 21 and a second shelf 23 arranged in sequence along the first direction (or the width direction of the combiner cabinet). The first shelf 21 and the second shelf 23 are both used to install the electrical component assembly. The second shelf 23 is located between the first shelf 21 and the cabinet door 11. Along the width direction of the combiner cabinet, at least part of the projection of the first shelf 21 on the cabinet door is located above the projection of the second shelf 23 on the cabinet door 11. In the embodiment of the present application, the arrangement direction of the cabinet door and the first side wall is the first direction. By arranging the electrical component assembly in the installation cavity and arranging the positive and negative portions of the electrical component assembly along the first direction, the electrical components located at the two ends are closer, the required wiring distance between the electrical components is short, and it is convenient for staff to operate.

[0029] The shelf 20 may further include a third shelf 25, which is used to mount electrical component assemblies. The first shelf 21 is closer to the first side wall 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 of the junction box, at least a portion of the projection of the first shelf 21 on the cabinet door 11 is located above the projection of the third shelf 25 on the cabinet door 11. In some embodiments, the first shelf 21 can be mounted on the first side wall 13. In other embodiments, the first shelf 21 can have two opposite sides connected to the second side wall 15 and the third side wall 17, respectively.

[0030] The junction box also includes an electrical component assembly, which is installed in the installation cavity 12 of the cabinet body 10. The electrical component assembly may include a positive electrode part 70 and a negative electrode part 80. The positive electrode part 70 and the negative electrode part 80 are arranged at intervals. The positive electrode part 70 is used to be electrically connected to the positive output terminal of the external high-voltage box and to the positive electrode of the battery pack; the negative electrode part 80 is used to be electrically connected to the negative output terminal of the external high-voltage box and to the negative electrode of the battery pack.

[0031] Please combine Figure 3In some embodiments, the external high-voltage box can be multi-cluster, and the combiner cabinet can combine the external multi-cluster high-voltage boxes and control the current and / or voltage of the input battery pack. Figure 3 B1+...B4+) can be connected to the junction box through the wiring harness, so that the positive output terminal of the external multi-cluster high-voltage box, the first circuit breaker, the positive fuse, the positive high-voltage relay, and the positive interface are electrically connected in sequence. The positive interface is used to electrically connect the positive electrode of the battery pack. The negative output terminal of the external multi-cluster high-voltage box (can refer to Figure 3 B1-...B4-) can be connected to the combiner cabinet via a wiring harness, thereby electrically connecting the negative output terminal of the external multi-cluster high-voltage box, the second circuit breaker, the negative fuse, the negative high-voltage relay, and the negative terminal interface. The negative terminal interface is used to electrically connect to the negative terminal of the battery pack. This allows the external multi-cluster high-voltage box to be electrically connected to a battery pack via an electrical component assembly, enabling functions such as charging and discharging 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.

[0032] For example, the external high-voltage boxes can be four clusters, and the four clusters of high-voltage boxes can be combined through the combiner cabinet in the embodiment of the present application to charge the battery pack. The combiner cabinet in the embodiment of the present application can serve as a bridge connecting the battery pack with the outside world, and both charging and discharging of the battery pack can pass through the combiner cabinet.

[0033] In some embodiments, the positive electrode portion 70 and the negative electrode portion 80 are arranged along the first direction (or the width direction of the combiner cabinet). In these embodiments, the positive electrode portion 70 and the negative electrode portion 80 are arranged along the first direction, which provides a reasonable layout, a more compact structure, and a smaller combiner cabinet footprint.

[0034] Please combine Figure 9 The positive electrode unit 70 may specifically include a positive fuse 71, a positive high-voltage relay 72, and a positive electrode interface 73. The positive fuse 71, the positive high-voltage relay 72, and the positive electrode interface 73 are electrically connected in sequence. The positive fuse 71 is used to electrically connect to the positive output terminal of the external high-voltage box, and the positive electrode interface 73 is used to electrically connect to the positive electrode of the battery pack. In the embodiment of the present application, the positive electrode unit 70 includes the positive fuse 71, which can be promptly melted when the current exceeds the specified value, thereby protecting the circuit safety of the positive electrode unit 70.

[0035] The electrical component assembly also includes a circuit breaker 74, which includes a first circuit breaker. The first circuit breaker is installed in the mounting cavity 12. In the embodiment of the present application, by providing a first circuit breaker electrically connected to the positive electrode portion 70, when a safety issue occurs, the first circuit breaker is promptly disconnected to protect the circuit safety. In addition, the first circuit breaker and the positive electrode portion 70 are arranged along the first direction, and the first circuit breaker is closer to the first side wall 13 than the positive electrode portion 70 and the negative electrode portion 80, resulting in a compact structure and a reasonable layout.

[0036] Please combine Figure 8 The negative electrode portion 80 may specifically include a negative fuse 81, a negative high-voltage relay 82, and a negative electrode interface 83. The negative fuse 81, the negative high-voltage relay 82, and the negative electrode interface 83 are electrically connected in sequence. The negative fuse 81 is used to electrically connect to the negative output terminal of the external high-voltage box, and the negative electrode interface 83 is used to electrically connect to the negative electrode of the battery pack. In the embodiment of the present application, the negative electrode portion 80 includes a negative fuse. When the current exceeds the specified value, it can be blown in time to protect the circuit safety of the negative electrode portion 80. Since fuses are separately provided on the positive electrode portion 70 and the negative electrode portion 80, the positive electrode portion 70 and the negative electrode portion 80 can be protected, thereby improving the safety of the circuit.

[0037] Circuit breaker 74 also includes a second circuit breaker, which is installed in mounting cavity 12. The second circuit breaker is electrically connected to negative electrode portion 80 and arranged along the first direction with respect to negative electrode portion 80. In this embodiment of the present application, by providing a second circuit breaker electrically connected to negative electrode portion 80, when a safety issue occurs, the second circuit breaker is promptly disconnected to protect the circuit safety.

[0038] Furthermore, the second circuit breaker may be closer to the first side wall 13 than the positive pole portion 70 and the negative pole portion 80 .

[0039] Specifically, the first circuit breaker, the positive fuse 71, the positive high-voltage relay 72, and the positive electrode interface 73 are electrically connected in sequence. The positive electrode interface is used to electrically connect the positive electrode of the battery pack, and the first circuit breaker is used to electrically connect to the positive output terminal of the external high-voltage box.

[0040] The second circuit breaker, negative fuse 81, negative high-voltage relay 82, and negative electrode interface 83 are electrically connected in sequence. The negative electrode interface is used to electrically connect the negative electrode of the battery pack, and the second circuit breaker is used to electrically connect to the negative electrode output end of the external high-voltage box.

[0041] In the embodiment of the present application, the first and second circuit breakers are used to open and close the entire high-voltage circuit. Specifically, the first circuit breaker is primarily used to open and close the positive portion, and the second circuit breaker is primarily used to open and close the negative portion. Through the cooperation of the first and second circuit breakers, the entire high-voltage circuit can be opened and closed.

[0042] If only the positive portion 70 is provided with a first circuit breaker, even if the first circuit breaker is disconnected, in certain circumstances, such as reverse connection or lightning strikes, the negative terminal of the battery pack may have high voltage, which may damage the battery pack through the pathway on the negative side, and also create a safety hazard. If only the negative portion 80 is provided with a second circuit breaker, even if the second circuit breaker is disconnected, the positive portion 70 may be in a high voltage state, which may create a safety hazard. In the embodiment of the present application, the positive output terminal of the high-voltage box is connected to the first circuit breaker in the positive portion 70, and the negative output terminal of the high-voltage box is connected to the second circuit breaker in the negative portion 80, which can further protect the circuit.

[0043] In the embodiment of the present application, fuses are provided at the positive electrode portion 70 and the negative electrode portion 80, and circuit breakers are connected to the positive electrode portion 70 and the negative electrode portion 80, thereby protecting the positive electrode portion 70 and the negative electrode portion 80 at the same time, and the circuit safety is high.

[0044] Furthermore, the first electrical component assembly further includes a first copper busbar and a second copper busbar.

[0045] The positive electrode portion 70 is electrically connected to the positive output terminal of the external high-voltage box through the first copper busbar, and the negative electrode portion 80 is electrically connected to the negative output terminal of the external high-voltage box through the second copper busbar, generating less heat.

[0046] The first copper bar can be installed on the first layer board 21, and the second copper bar can be installed on the first layer board 21. The second copper bar is spaced apart from the first copper bar, so that the first copper bar is convenient for connecting the positive electrode part 70 and the positive output end of the external high-voltage box respectively, and the second copper bar is convenient for connecting the negative electrode part 80 and the negative output end of the external high-voltage box respectively, and the structure is compact.

[0047] In some embodiments, the first copper busbar may specifically include a cluster high-voltage positive electrode connection copper busbar 75 and a cluster high-voltage positive electrode to circuit breaker copper busbar 76 .

[0048] The second copper busbar may specifically include a cluster high voltage negative electrode connection copper busbar 85 and a cluster high voltage negative electrode to circuit breaker copper busbar 86 .

[0049] The positive output terminal of the high-voltage box can be connected to the cluster high-voltage positive wiring copper busbar 75 via a wiring harness, and then connected to the first circuit breaker via the cluster high-voltage positive to circuit breaker copper busbar 76. The first circuit breaker 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 the copper busbar. The positive high-voltage relay 72 is connected to the positive output wiring harness via the output wiring harness copper busbar. The positive output wiring harness is connected to the positive terminal 73. The first circuit breaker to output positive copper busbar 77 can be installed on the side of the second layer board 23 facing the cabinet door 11.

[0050] The negative output terminal of the high-voltage box is connected to the cluster high-voltage negative wiring copper busbar 85 via a wiring harness, and then to the second circuit breaker via the cluster high-voltage negative to circuit breaker copper busbar 86. The circuit breaker to output negative copper busbar 87 is electrically connected to the negative fuse 81. The negative fuse 81 is connected to the negative high-voltage relay 82 via a copper busbar. The negative high-voltage relay 82 is connected to the negative output wiring harness via a copper busbar. The negative output wiring harness is connected to the negative terminal 83. The circuit breaker to output negative copper busbar 87 can be installed on the side of the third layer board 25 facing the cabinet door 11.

[0051] Please combine Figure 7 Furthermore, in order to protect the fuse and relay, prevent the charging current from being too large at the moment of direct power-on, and avoid damage to the fuse and switching devices such as relays 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 board 21 facing the second layer board 23.

[0052] In some embodiments, the circuit breaker 74 (including the first circuit breaker and the second circuit breaker) can be installed on the side of the first layer board 21 close to the cabinet door 11, the positive pole part 70 is installed on the side of the second layer board 23 close to the cabinet door 11, and the negative pole part 80 is installed on the side of the third layer board 25 close to the cabinet door 11.

[0053] In these embodiments, multiple layers 20 are provided, and the circuit breaker 74 , the positive electrode portion 70 , and the negative electrode portion 80 are respectively installed on different layers, so that the circuit breaker 74 , the positive electrode portion 70 , and the negative electrode portion 80 are arranged along the first direction.

[0054] In some embodiments, in addition to the positive electrode portion 70 and the negative electrode portion 80, the electrical component assembly also includes a control portion 100, which is installed in the installation cavity 12. The control portion 100 is used 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 used to be electrically connected to the communication signal end of the external high-voltage box to detect the status of the external high-voltage box and the battery pack.

[0055] In the related art, energy storage systems typically include a junction box in the form of an independent equipment cabinet, which is used to achieve junction with an external high-voltage box. The junction box has relatively simple functions. If input or output current and voltage are to be controlled, another electrical control cabinet in the form of an independent equipment cabinet is required, which takes up a large amount of space. In an embodiment of the present utility model, the electrical component assembly installed in the cabinet includes a positive electrode portion, a negative electrode portion, and a control portion. The external high-voltage box can be connected to the positive and negative electrodes of the battery pack through the positive and negative electrodes, respectively. The positive and negative electrodes achieve junction, and the control portion is used to achieve electrical connection with the communication signal terminal of the external high-voltage box, detect the status of the external high-voltage box and the battery pack, and thus enrich the functionality of the junction box. Moreover, compared with the solution in the related art in which the control unit is arranged in a separate cabinet and the positive and negative poles are arranged in another separate cabinet, in an embodiment of the present utility model, the control unit and the positive and negative poles are all arranged inside the same cabinet, and the control unit and the positive pole are arranged along the length direction or width direction of the junction cabinet, thereby reducing the use of one cabinet and making the structure between the control unit and the positive and negative poles more compact.

[0056] In the embodiment of the present application, a control unit 100 is provided in the cabinet, and the control unit 100 is used to be electrically connected to the communication signal terminal of the external high-voltage box, thereby having 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 detect the status of the external high-voltage box and the battery pack in real time. If there is a fault in the high-voltage box, it can be fed back to the junction cabinet through the communication signal terminal, and the junction cabinet will then feed back to the driving console. Third, the status of the battery pack can be detected and fed back in real time through the communication signal terminal, including the operating voltage, operating current, remaining power, remaining battery life, etc. of the battery system. Compared with the related art, the energy storage system usually includes a solution in which an electric control cabinet and a junction cabinet each exist in the form of an independent equipment cabinet. The junction cabinet provided in the embodiment of the present application has richer functions, a compact structure, and occupies less space.

[0057] It should be noted that the high-voltage box outside the combiner cabinet specifically includes: positive output terminals, negative output terminals, and communication signal terminals. The cabinet sidewalls may be provided with cable inlets 90 for connecting external wiring harnesses. These inlets 90 specifically include positive, negative, and communication inlets. The high-voltage wiring harness connected to the high-voltage box can be installed in these inlets 90 via cable glands. These glands secure the wiring harness, enhancing the cabinet's protection level and preventing foreign matter and moisture from entering the combiner cabinet, potentially causing malfunctions and short circuits.

[0058] The communication signal terminal enters the cabinet through a communication inlet on the cabinet side wall and is then connected to the BMS control unit 31. The positive output terminal of the external high-voltage box enters the cabinet through a positive inlet on the cabinet side wall, connects to the first copper busbar, and is connected to the first circuit breaker. The negative output terminal enters the cabinet through a negative inlet on the cabinet side wall, connects to the second copper busbar, and is connected to the second circuit breaker.

[0059] In some embodiments, the control unit 100 and the positive electrode unit 70 can be arranged along the length direction of the combiner cabinet, and the positive electrode unit 70 and the negative electrode unit 80 can be arranged along the width direction of the combiner cabinet, i.e., the first direction, so that the structure can be more compact and occupy less space.

[0060] In some embodiments, the control unit 100 includes a first sub-control unit 101 and a second sub-control unit 103. The first sub-control unit 101, the positive electrode unit 70, and the second sub-control unit 103 are arranged in sequence along the length of the combiner cabinet. In these embodiments, the control unit 100 is provided in two groups, with the first sub-control unit 101 and the second sub-control unit 103 located on either side of the positive electrode unit 70 and the negative electrode unit 80. Specifically, the first sub-control unit 101 can be mounted on the second side wall 15, and the second sub-control unit 103 can be mounted on the third side wall 17.

[0061] In some embodiments, the second sub-control unit 103 of the control unit 100 includes a BMS control unit 31, which is used to electrically connect to the communication signal terminal of the external high-voltage box. The BMS control unit 31 is electrically connected to the positive electrode part 70 and the negative electrode part 80 respectively.

[0062] In some embodiments, the electrical component assembly further includes an adjustment indicator 200 , which is mounted 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 component 31 for adjusting and indicating the operating condition of the battery pack.

[0063] In the embodiment of the present application, the electrical component assembly can be multiple groups. The specific structure of the electrical component assembly has been described above. Each electrical component assembly includes the above-mentioned positive electrode part 70, negative electrode part 80, control part, etc., and its specific content is not repeated here.

[0064] An electrical component assembly can be used to electrically connect to multiple external high-voltage boxes and to electrically connect to a battery pack, thereby allowing multiple electrical component assemblies to be electrically connected to multiple battery packs. Multiple electrical component assemblies are arranged from top to bottom along the height of the combiner cabinet. Thus, a combiner cabinet according to an embodiment of the present application can simultaneously meet the needs of combining multiple battery packs, while occupying a small area, being easy to use, and having a lower cost.

[0065] In some embodiments, an electrical component assembly is used to electrically connect to an external multi-cluster high-voltage box and to electrically connect to a battery pack.

[0066] In the embodiments of the present invention, each electrical component assembly is configured to electrically connect to multiple external high-voltage boxes and to a battery pack, thereby enabling a single electrical component assembly to combine power with multiple external high-voltage boxes. After the power from the multiple external high-voltage boxes is combined through the electrical component assembly, the power is then charged and discharged for a single battery pack. Multiple electrical component assemblies are arranged within a single cabinet, electrically connecting to multiple battery packs. This allows for the integration of multiple battery packs, thereby addressing the technical issue of conventional combiner cabinets, which struggle to meet the integration requirements of multiple battery packs.

[0067] In some embodiments, for ease of description, the plurality of battery packs include at least a first battery pack and a second battery pack, and the plurality of electrical component assemblies include at least a first electrical component assembly and a second electrical component assembly. The cabinet's mounting cavity includes a first mounting cavity 121 and a second mounting cavity 123 arranged from top to bottom along the height direction of the combiner cabinet;

[0068] The first electrical component assembly is installed in the first installation cavity 121. The first electrical component assembly is electrically connected to the external high-voltage box, which is also electrically connected to the first battery pack. The external high-voltage box can be multi-clustered. The second electrical component assembly is installed in the second installation cavity 123. The second electrical component assembly is electrically connected to the external high-voltage box, which is also electrically connected to the second battery pack. The external high-voltage box can be multi-clustered.

[0069] In some embodiments, a single battery pack can be connected to four clusters of high-voltage boxes, and there are eight clusters of high-voltage boxes outside. The first electrical component assembly can converge the four external clusters of high-voltage boxes to charge the first battery pack; the second electrical component assembly can converge another four external clusters of high-voltage boxes to charge the second battery pack.

[0070] In the embodiment of the present application, a junction box is used to simultaneously meet the high-voltage junction and low-voltage control of two or more battery groups, which occupies a small area, is easy to use, and has lower cost.

[0071] Please combine Figure 4 Furthermore, the first installation cavity 121 may include a first installation space 1211 and a second installation space 1213 arranged along the height direction of the combiner cabinet. Specifically, in the first installation cavity 121, along the width direction of the combiner cabinet, at least a portion of the projection of the first layer board 21 on the cabinet door is located above the projection of the second layer board 23 on the cabinet door 11. Along the width direction of the combiner cabinet, at least a portion of the projection of the first layer board 21 on the cabinet door is located above the projection of the third layer board 25 on the cabinet door 11. In this way, at least a portion of the first layer board 21 can directly oppose the cabinet door 11, forming the first installation space 1211.

[0072] A portion of first layer board 21, second layer board 23, and third layer board 25 form second installation space 1213. Second installation space 1213 specifically includes a first sub-installation cavity, a second sub-installation cavity, and a third sub-installation cavity. Portions of first layer board 21 and second layer board 23 define the first sub-installation cavity, second layer board 23 and third layer board 25 define the second sub-installation cavity, and third layer board 25 and the cabinet door define the third sub-installation cavity. At least a portion of the first circuit breaker is installed in first installation space 1211, and at least a portion of the second circuit breaker is installed in first installation space 1211.

[0073] The specific implementation method is:

[0074] The first layer 21 can be connected to the second and third side walls on opposite sides, for example, by welding or screwing. The second layer 23 can be connected to the second and third side walls on opposite sides, for example, by welding or screwing. The third layer 25 can be connected to the second and third side walls on opposite sides, for example, by welding or screwing. In this way, the first, second, and third layer 21, 23, and 25 are installed in the cabinet. This makes the structure more compact, reducing the cabinet volume and space occupied.

[0075] In the second installation cavity 123 , the specific positional relationship among the first layer board 21 , the second layer board 23 and the third layer board 25 may refer to their specific positional relationship in the first installation cavity 121 .

[0076] In some embodiments, each electrical component assembly includes the aforementioned positive electrode portion 70 and negative electrode portion 80. The positive electrode portion 70 is used to electrically connect 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 used to electrically connect to the negative output terminal of the external high-voltage box and to the negative electrode of the battery pack. In this way, one electrical component assembly can correspond to one battery pack, and multiple electrical component assemblies can correspond to multiple battery packs. There can be a one-to-one correspondence between electrical component assemblies and battery packs.

[0077] Please combine Figure 3 Since it can be connected to multiple clusters of high-voltage boxes, the overcurrent capacity of one positive interface with one negative interface cannot meet the use requirements. Therefore, each of the electrical component assemblies includes multiple positive parts 70 and multiple negative parts 80, wherein the positive parts 70 correspond to the negative parts 80 one by one. In other words, each electrical component assembly includes multiple positive parts 70 and multiple negative parts 80, thus, each electrical component assembly includes multiple positive interfaces (see Figure 3 Charging station 1DC+ and Figure 3 Charging station 2DC+), multiple negative interfaces (see Figure 3 Charging station 1DC in the Figure 3In the charging dock 2DC-), the positive and negative terminals are in a one-to-one correspondence, with one positive terminal and one negative terminal forming a charging and discharging interface. Multiple positive electrode sections 70 are each electrically connected to the positive terminal of a battery pack, and multiple negative electrode sections 80 are each electrically connected to the negative terminal of a battery pack. By providing multiple positive electrode sections 70 and multiple negative electrode sections 80, a higher current can be supplied to a battery pack.

[0078] In some embodiments, since the maximum current input by the four-cluster high-voltage box is about 448A and the overcurrent capacity of a single charge and discharge interface is about 250A, in order to meet the overcurrent requirement, two positive pole parts 70 and two negative pole parts 80 are provided to share the current.

[0079] In some embodiments, the control unit 100 can distinguish between the two battery packs for user convenience. Each electrical component assembly includes a control unit, which is used to electrically connect to the electrical component assembly and the battery pack. The control unit is also used to electrically connect 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. In this way, one control unit can control one battery pack, providing accurate control.

[0080] 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 installation cavity 121, and the second control unit is installed in the second installation cavity 123, the first control unit is electrically connected to the first battery pack and the first electrical component assembly, respectively, to detect the status of the external high-voltage box and the first battery pack, and the second control unit is electrically connected to the second battery pack and the second electrical component assembly, respectively, to detect the status of the external high-voltage box and the second battery pack.

[0081] The first battery pack and the second battery pack are controlled separately by the first control unit and the second control unit, so that the two battery pack control parts are independent of each other and do not interfere with each other, thereby reducing the failure rate and improving the control accuracy.

[0082] In some embodiments, in each electrical component assembly, the control unit includes two parts, an electrically connected first sub-control unit 101 and a second sub-control unit 103. Along the length direction of the cabinet, the first sub-control unit and the second sub-control unit are located on both sides of the cabinet, and specifically can be installed on the second side wall and the third side wall respectively.

[0083] Specifically, the second sub-control unit is installed on the side of the third side wall of the cabinet facing the second side wall of the cabinet. The first sub-control unit is installed on the side of the second side wall of the cabinet located on the left side of the cabinet facing the third side wall of the cabinet.

[0084] Please combine Figure 5 as well as Figure 6The first sub-control unit controls the indicator light module 41 and the switch module 43. It may include a signal relay 33, an air switch 35, a cable duct 36, wiring terminals 37, and an AC / DC power supply 38. The second sub-control unit 103 may include the BMS control unit 31. The communication signal terminal can power the control unit via the AC / DC power supply in the combiner cabinet.

[0085] Specifically, in first installation space 1211, a first bracket plate may be mounted on a side of the second side wall of the cabinet facing the third side wall of the cabinet, the first sub-control unit being mounted on the first bracket plate and being mounted to the second side wall via the first bracket plate. A second bracket plate may be mounted on a side of the third side wall of the cabinet facing the second side wall of the cabinet, the second sub-control unit being mounted on the second bracket plate and being mounted to the third side wall via the bracket plate.

[0086] In some specific embodiments, a BMS control unit 31 is mounted on the second bracket plate for battery management and is 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 line inlet and then connect to the BMS control unit 31. The BMS battery management system is also configured in multiple groups, with one BMS controlling one battery system. In some embodiments, the battery system is configured in two groups, and the BMS battery management system is configured in two groups, thereby managing the two battery systems separately.

[0087] Specifically, a guide rail can be installed on the first bracket plate, and the connection terminal 37, the signal relay 33 and the air switch 35 are all installed on the guide rail and are snap-fitted to the guide rail. The AC / DC power supply 38 is installed on the first bracket plate.

[0088] 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 installation cavity. The indicator lights and switches are connected to the wiring terminals through the wiring harness, and the wiring terminals are then connected to the signal relay and the air switch through the wiring harness. The wiring harness can be merged into the wiring trough and connected to the BMS control component 31, and the BMS control component 31 then outputs the signal to the driving console through the wiring harness.

[0089] In some embodiments, each first electrical component assembly further includes an auxiliary power part, which can be installed on the second layer board 23 and the third layer board 25. The auxiliary power part 300 includes an auxiliary power positive fuse, an auxiliary power negative fuse, an auxiliary power positive interface, and an auxiliary power negative interface. The auxiliary power positive fuse and the auxiliary power positive interface can be installed on the second layer board 23, and the auxiliary power negative fuse and the auxiliary power negative interface can be installed on the third layer board 25. The first circuit breaker, the auxiliary power positive fuse, and the auxiliary power positive interface are electrically connected in sequence, and the auxiliary power positive interface is used to electrically connect the positive pole of the auxiliary power cabinet;

[0090] The second circuit breaker, the auxiliary power negative fuse, and the auxiliary power positive electrode interface are electrically connected in sequence, and the auxiliary power negative electrode interface is used to electrically connect to the negative electrode of the auxiliary power cabinet.

[0091] The auxiliary power positive and negative ports are used to connect to and charge the auxiliary power cabinet. Auxiliary power positive and negative fuses are also provided to accommodate the need for separate fuse placement for each circuit.

[0092] Specifically, the positive output end of the high-voltage box is connected to the cluster high-voltage positive wiring copper busbar through a wiring harness, and then connected to the circuit breaker through the cluster high-voltage positive to the circuit breaker copper busbar. The circuit breaker is connected to the auxiliary power positive fuse. The auxiliary power positive fuse is connected to the auxiliary power positive output wiring harness through the auxiliary power positive copper busbar. The auxiliary power positive output wiring harness is connected to the auxiliary power positive interface.

[0093] The negative output end of the high-voltage box is connected to the cluster high-voltage negative wiring copper busbar through a wiring harness, and then connected to the circuit breaker through the cluster high-voltage negative busbar. The circuit breaker is connected to the auxiliary power negative fuse. The auxiliary power negative fuse is connected to the auxiliary power negative output wiring harness through the auxiliary power negative copper busbar. The auxiliary power negative output wiring harness is connected to the auxiliary power negative interface.

[0094] In some embodiments, each first electrical component assembly further includes a surge protection unit, which can be installed on the second layer board 23 . The surge protection unit includes a first surge fuse 401 , a surge protector 405 , and a second surge fuse 403 .

[0095] The first circuit breaker, the first surge fuse, the surge protector, the second surge fuse, and the second circuit breaker are electrically connected in sequence to form a surge protection circuit. The surge protection circuit is provided to prevent equipment from being damaged by lightning strikes.

[0096] Specifically, the first circuit breaker is electrically connected to the positive copper busbar connected to the circuit breaker output, the second circuit breaker is electrically connected to the negative copper busbar connected to the circuit breaker output, and one end of the first surge fuse is connected to the positive copper busbar connected to the circuit breaker output via a wiring harness, thereby electrically connecting the first surge fuse to the first circuit breaker. The other end of the first surge fuse is connected to the surge protector, one end of the surge protector is connected in series to the second surge fuse via a wiring harness, and the second surge fuse is further connected to the negative copper busbar connected to the circuit breaker output via a wiring harness, thereby electrically connecting the second surge fuse to the second circuit breaker. The positive copper busbar connected to the circuit breaker output can be installed on the side of the second layer board 23 facing the cabinet door. The negative copper busbar connected to the circuit breaker output can be installed on the side of the third layer board 25 facing the cabinet door.

[0097] In some embodiments, guide rails and insulating columns can be installed on the second layer plate 23. The guide rails are used to fix the surge protector, thereby improving installation efficiency and installation stability. The first surge fuse and the second surge fuse are fixed on the insulating columns of the bracket plate.

[0098] Please combine 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. In the event of a loose wire harness, the shelf closer to the cabinet door can be directly reinforced without removing the outer layer, thereby facilitating reinforcement and maintenance.

[0099] In some embodiments, the layer board may be covered with a PC film to improve insulation performance. Specifically, the layer board may be covered with a PC film on the side facing the cabinet door.

[0100] In some embodiments, an insulating plate may be installed on the side facing away from the cabinet door to increase the electrical gap between the copper bars and improve the insulation performance. The insulating plate may be an acrylic insulating plate.

[0101] In some embodiments, each first electrical component assembly further includes an adjustment indicator portion, which is installed on a side of the cabinet door away from the installation cavity and is used to adjust and indicate the working condition of a battery pack.

[0102] The adjustment indicating unit 200 may include a first operating module 40 , a second operating module 50 and a warning module 60 . The first operating module 40 , the second operating module 50 and the warning module 60 are sequentially arranged from top to bottom along the height direction of the cabinet.

[0103] The first operating module is used to display and control the operating condition of the first battery pack, and the second operating module is used to display and control the operating condition of the second battery pack.

[0104] In this embodiment of the present application, because the control unit groups the first and second battery packs, when a fault occurs, the source of the fault can be intuitively identified. The input and output of the battery pack can also be promptly disconnected to avoid further losses. This allows for status monitoring of the high-voltage boxes of both battery packs, and overall communication between the two battery systems can be integrated and output to the driver's console.

[0105] Next, the first operating module will be described.

[0106] The first operating module 40 includes an indicator light module 41, a switch module 43, a buzzer 45, and a display module 47. The first operating 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.

[0107] The display module is arranged on one side where the cabinet door is connected to the cabinet body, and on the other side where the cabinet door is connected to the cabinet body. The indicator light module is arranged on one side of the display module and is spaced apart from the display module.

[0108] The indicator light module 41 may include an operation 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 modules are arranged in two parallel rows, with the first row including the operation indicator light, the fault indicator light, and the closing indicator light, and the second row including the over-temperature indicator light, the 24V power 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 of indicator light modules, making them easier for operators to operate.

[0109] 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, the start / stop control switch 433, and the mute control switch 435 are arranged in a row and are configured to be arranged in parallel with the indicator light module. Therefore, the indicator light module 41 and the switch module 43 are arranged in parallel. From top to bottom, they are the first row of indicator light modules 41, the second row of indicator light modules 41, and the switch module 43. The switch module and the indicator light module are relatively compact. Among them, the position of the first row of indicator light modules is higher than the display module 47. There is an installation space between the side of the first row of indicator light modules facing the display module and the display module. The buzzer and emergency stop switch 437 are installed in this installation space, which is convenient for operators to operate and not easy to be accidentally touched. Among them, the buzzer is set near the first row of indicator light modules and is located above the display module. The emergency stop switch is located between the buzzer and the display module 47.

[0110] A display module 47 is mounted on the cabinet door and displays relevant parameters and operating conditions. The display modules 47 are arranged separately for the first and second battery packs. The display modules 47 for the two battery packs are independent and do not interfere with each other. The two display modules 47 on the cabinet door allow the battery status of the two battery systems to be monitored separately. In some embodiments, both display modules 47 can be touchscreen displays.

[0111] The structure and function of the second operating module can be compared to the first operating module. The second operating module is used to display and control the operating status of the second battery pack. The first operating module can be opened separately to reveal its internal structure, and the second operating module can be opened separately to reveal its internal structure. At the same time, the cabinet door can also be opened as a whole. When the cabinet lock is unlocked, the cabinet door can be opened as a whole using the handle.

[0112] The warning module 60 includes: a sign and a cabinet lock. The ventilation member is set near the bottom of the cabinet door, and the sign is set between the ventilation member, the cabinet lock and the second operating module. The cabinet lock is used to lock the cabinet door and the cabinet body. The sign can be a high-voltage warning sign.

[0113] In an embodiment of the present application, the low-voltage indicator light and the control switch are arranged separately in the first battery group and the second battery group. The low-voltage indicator light and the control switch of each battery group are independent of the low-voltage indicator light and the control switch of the other battery group and do not interfere with each other, so that the charging and discharging of the two battery groups can be controlled separately.

[0114] To improve the heat dissipation effect, in the embodiments of the present application, the junction cabinet can adopt ventilation heat dissipation. In some embodiments, an air outlet 1010 is provided on the top of the cabinet body 10, and an air inlet 1030 is provided on the cabinet door, wherein the air inlet and the air outlet are respectively connected to the installation cavity 12, and the air outlet assembly is used to discharge the gas in the installation cavity 12 out of the air outlet 1010; the electrical component assembly is installed in the installation cavity 12 and is used to converge multiple external high-voltage boxes, and at least part of the electrical component assembly is located in the air path between the air inlet and the air outlet. In these embodiments, air enters the cabinet body through the air inlet, and the electrical component assembly generates heat when working. The heated air will rise and pass through the electrical component assembly, which can fully drive the hot air emitted by the electrical component assembly to be discharged upward, thereby avoiding high temperature accumulation and causing electrical component assembly failure. The air inlet 1030 can be opened at a position near the bottom wall 19 of the cabinet door.

[0115] In the embodiment of the present application, the air intake at the bottom and the air outlet at the top are conducive to discharging more hot air and improving the heat dissipation effect. The air carries away the heat generated by the electrical components and is discharged from the top of the cabinet. The top air outlet is conducive to discharging more hot air and improving the heat dissipation effect.

[0116] In some embodiments, the combiner cabinet further includes an air outlet assembly, which is installed in the installation cavity 12 and is disposed near the top of the cabinet body. The air outlet assembly is used to discharge the gas in the cabinet body 10 out of the air outlet 1010. The air outlet assembly and the air outlet 1010 are disposed at the top to improve heat dissipation efficiency.

[0117] In some embodiments, the air outlet assembly includes a fan, a first filter and a second filter. The fan is used to allow air to enter the cabinet, dissipate heat for the internal components of the cabinet, and allow the gas in the installation cavity to be discharged from the air outlet, that is, to exhaust air to the outside. The first filter is installed on the cabinet 10 to cover the air outlet 1010. The air inlet assembly includes a second filter, and the second filter is installed on the cabinet door to cover the air inlet. The second filter covers the air inlet, thereby preventing external gas from entering the cabinet with particulate matter and having an adverse effect on the electrical component assembly. The first filter 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 Ye blower, etc., and this application does not limit this.

[0118] The first filter and the second filter can both be louver filters, and the fan can include a louver fan, which is connected to the BMS control component 31 through a wiring harness. The program in the BMS control component 31 controls the opening and closing of the fan to achieve ventilation and heat dissipation inside the junction box.

[0119] Among them, the air inlet can use a 323mm*323mm louver filter group, and the air outlet can use two sets of 204mm*204mm louver filter groups with two 24V DC axial fans. The protection level can reach IP55 and the air flow can reach 98m3 / h.

[0120] In some embodiments, the louver fan can be connected to the BMS control unit 31 through a wiring harness, and the program in the BMS control unit 31 controls the opening and closing of the fan to achieve ventilation and heat dissipation inside the junction box.

[0121] In some embodiments, the side of the shelf facing the air inlet is used to install the electrical component assembly; along the first direction, the projection of at least part of the electrical component assembly on the cabinet door is located above the air inlet, and / or, the projection of at least part of the electrical component assembly on the cabinet door is located inside the air inlet.

[0122] Therefore, the air entering through the air inlet can pass through the electrical component components on the shelf, thereby improving heat dissipation.

[0123] In some embodiments, each of the plurality of layer plates may be provided with a through hole extending through the first direction.

[0124] In these embodiments, the layers are all provided with through holes extending along the first direction, which can be used to install electrical component assemblies and for maintenance. After the external air enters between the third layer 25 and the cabinet door through the air inlet, it can enter between the second layer 23 and the third layer 25 through the through holes, and can also enter between the first layer 21 and the second layer 23 through the through holes, which helps to dissipate heat.

[0125] In the embodiment of the present application, after the external air enters the cabinet, it can be divided into at least two paths. One path enters between the first layer board 21 and the second layer board 23, and takes away the heat of part of the first electrical component assembly installed on the first layer board 21; the other path enters between the second layer board 23 and the cabinet door, and takes away the heat of part of the first electrical component assembly installed on the second layer board 23, and is discharged through the air outlet set on the top wall. In other words, the first electrical component assembly is cooled at the same time by two paths of gas, and the heat dissipation efficiency is high.

[0126] In some embodiments, along the first direction, at least a portion of the projection of the first layer board 21 on the cabinet door is located above the projection of the second layer board 23 on the cabinet door.

[0127] That is to say, at least part of the first layer 21 can be directly opposite to the cabinet door to form a chamber, and the chamber is located above the second layer 23 and the third layer 25. In other words, the second layer 23 and the third layer 25 are not set between at least part of the first layer 21 and the cabinet door. In this way, the gas entering between the first layer 21 and the second layer and the gas entering between the second layer and the cabinet door can converge at the chamber formed by the first layer 21 and the cabinet door directly opposite each other. In this way, the gas can be fully discharged from the air outlet, which is beneficial to heat dissipation.

[0128] The air outlet 1010 is provided on the top wall 18. Along the height direction of the combiner cabinet, at least a portion of the projection of the second layer board 23 on the top wall 18 is located inside the air outlet 1010. In this way, air can be blown out from the air outlet more easily.

[0129] In some embodiments, the cabinet further includes an insulating plate, with at least one shelf mounted on a side facing away from the cabinet door. This increases the electrical clearance between electrical components, such as copper busbars, thereby improving heat dissipation and insulation performance.

[0130] In a second aspect, an embodiment of the present application further provides an energy storage system, which includes a combiner cabinet as described in any of the above embodiments.

[0131] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A combiner cabinet, characterized in that: include: Cabinet; An electrical component assembly is installed in the cabinet, and the electrical component assembly is divided into multiple groups. The multiple groups of electrical component assemblies are used to electrically connect to multiple groups of battery packs. The multiple groups of electrical component assemblies are arranged from top to bottom along the height direction of the junction cabinet, wherein each of the electrical component assemblies is used to electrically connect to multiple external high-voltage boxes and to electrically connect to a battery pack.

2. The combiner cabinet according to claim 1, characterized in that: Each of the electrical component assemblies includes a positive electrode portion and a negative electrode portion. The positive electrode portion is used to electrically connect to the positive output terminal of the external high-voltage box and to the positive electrode of a battery pack; the negative electrode portion is used to electrically connect to the negative output terminal of the external high-voltage box and to the negative electrode of the battery pack.

3. The combiner cabinet according to claim 2, characterized in that: It also includes a cabinet door, which is connected to the cabinet body and is used to open and close the cabinet body. The cabinet body includes a first side wall arranged opposite to the cabinet door, and the arrangement direction of the cabinet door and the first side wall is a first direction; the positive pole part and the negative pole part are arranged along the first direction.

4. The combiner cabinet according to claim 2, characterized in that: Each of the electrical component assemblies includes multiple positive electrode parts and multiple negative electrode parts. One positive electrode part is corresponding to one negative electrode part. The multiple positive electrode parts are electrically connected to the positive electrode of a battery pack, and the multiple negative electrode parts are electrically connected to the negative electrode of the battery pack.

5. The combiner cabinet according to claim 2, characterized in that: Each of the electrical component assemblies includes a control unit, which is used to electrically connect to the positive electrode unit, the negative electrode unit and the battery pack respectively. The control unit is also used to electrically connect to the communication signal end 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, characterized in that: Each of the electrical component assemblies further includes an auxiliary power part, which includes an auxiliary power positive fuse, an auxiliary power negative fuse, an auxiliary power positive electrode interface, and an auxiliary power negative electrode interface. The auxiliary power positive fuse and the auxiliary power positive electrode interface are electrically connected in sequence, and the auxiliary power positive electrode interface is used to electrically connect to the positive electrode of the auxiliary power cabinet; The auxiliary power negative fuse and the auxiliary power positive electrode interface are electrically connected in sequence, and the auxiliary power negative electrode interface is used to electrically connect to the negative electrode of the auxiliary power cabinet.

7. The combiner cabinet according to any one of claims 1 to 5, characterized in that: Each of the electrical component assemblies further includes a surge protection unit, a first circuit breaker and a second circuit breaker. The surge protection unit includes a first surge fuse, a surge protector and a second surge fuse. The first circuit breaker, the first surge fuse, the surge protector, the second surge fuse and the second circuit breaker are electrically connected in sequence.

8. The combiner cabinet according to claim 3, characterized in that: Each of the electrical component assemblies further includes an adjustment indicator portion, which is mounted on a side of the cabinet door facing away from the cabinet body and is used to adjust and indicate the working condition of a battery pack.

9. The combiner cabinet according to claim 8, characterized in that: Each of the adjustment indicating parts includes an indicator light module and a switch module, and the indicator light module and the switch module are electrically connected to the control part respectively.

10. An energy storage system, characterized in that: It comprises the combiner cabinet according to any one of claims 1 to 9.

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