Collector box and energy storage system

Abstract

The present application provides a collector box and an energy storage system.SOLUTION: The power collection box includes a box body 10 and an electric element assembly 14 mounted in the box body, the electric element assembly includes a positive electrode portion 70, a negative electrode portion 80 and a control portion 100, the positive electrode portion is electrically connected to a positive output terminal of an external power distribution box and is electrically connected to a positive electrode of the battery pack, the negative electrode portion is electrically connected to a negative output terminal of the external power distribution box and is electrically connected to a negative electrode of the battery pack, and the control portion is electrically connected to a communication signal terminal of the external power distribution box to detect states of the external power distribution box and the battery pack. The control part and the positive electrode part are arranged along the length direction or the width direction of the collector box.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This application claims priority from a Chinese application with application number 202411046029.3 filed on July 31, 2024, and an international application with application number PCT / CN2024 / 127444 filed on October 25, 2024, and incorporates by reference all the contents of those applications.

[0002] The present application relates to the field of energy storage technology, and in particular to current collector boxes and energy storage systems. [Background technology]

[0003] In the related art, energy storage systems typically include a current collection box in the form of an independent equipment cabinet, through which current is collected to an external distribution box.

[0004] [Technical issues] Although the function of the current collection box is relatively simple, the control of the input or output current and voltage must be realized using a separate electrical control cabinet in the form of an independent equipment cabinet, which requires a large occupied space.

[0005] [Technical solution] The present application provides a current collection box, the current collection box comprising: The box body and and an electric element assembly mounted within the box, the electric element assembly comprising a positive electrode portion, a negative electrode portion, and a control portion, the positive electrode portion being configured to be electrically connected to the positive output terminal of the external distribution box and to be electrically connected to the positive electrode of the battery pack, the negative electrode portion being connected to the negative output terminal of the external distribution box and to be electrically connected to the negative electrode of the battery pack, the control portion being electrically connected to a communication signal terminal of the external distribution box and configured to detect the states of the external distribution box and the battery pack, and the control portion and positive electrode portion being arranged along the length direction or width direction of the collection box.

[0006] The present application further provides an energy storage system, comprising any one of the current collection boxes described above.

[0007] [Beneficial effects] In the current collecting box provided by the present application, the electric element assembly mounted within the box includes a positive electrode part, a negative electrode part, and a control part, and the external distribution box can be connected to the positive and negative electrodes of the battery pack via the positive and negative electrode parts, respectively, to collect current via the positive and negative electrode parts, and the control part can electrically connect to the communication signal terminals of the external distribution box and detect the status of the external distribution box and the battery pack, thereby further enhancing the functionality of the current collecting box. Furthermore, compared to the conventional solution in which the control part is installed in an independent box and the positive and negative electrode parts are installed in separate boxes, in the present application the control part, the positive and negative electrode parts are installed within the same box, and the control part and the positive electrode part are arranged along the length or width of the current collecting box, thereby reducing the use of a single box and making the structure between the control part and the positive and negative electrode parts more compact.

[0008] The energy storage system provided by the present application employs the above-mentioned current collecting box, and enables the control unit to realize electrical connection with the communication signal terminal of the external distribution box and detect the status of the external distribution box and the battery pack, thereby further enhancing the functionality of the current collecting box. Furthermore, compared with the conventional solution in which the control unit is installed in an independent box and the positive and negative electrode units are installed in separate boxes, the control unit, the positive and negative electrode units are installed in the same box, and the control unit and the positive electrode unit are arranged along the longitudinal or lateral direction of the current collecting box, thereby reducing the use of a single box and making the structure between the control unit and the positive and negative electrode units more compact. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is an exploded view of a current collector box provided by an embodiment of the present application. [Figure 2] FIG. 2 is a schematic diagram of the structure of the laminated board of FIG. [Figure 3] FIG. 2 is a circuit diagram of a current collection box provided by an embodiment of the present application. [Figure 4]1 is a perspective view of a current collection box provided by an embodiment of the present application with a box door removed, viewed from a first angle; FIG. [Figure 5] FIG. 2 is a perspective view of a current collection box provided by an embodiment of the present application with the box door removed, viewed from a second angle. [Figure 6] FIG. 2 is a schematic diagram of the structure of the box door of FIG. 1. [Figure 7] FIG. 10 is a perspective view of the current collection box provided by the embodiment of the present application with the box door removed, viewed from a third angle. [Figure 8] FIG. 10 is a perspective view of the current collection box provided by the embodiment of the present application with the box door removed, viewed from a fourth angle. [Figure 9] FIG. 10 is a perspective view of the current collection box provided by the embodiment of the present application with the box door removed, viewed from a fifth angle. DETAILED DESCRIPTION OF THE INVENTION

[0010] Referring to Fig. 1, the current collection box in the embodiment of the present application includes a box body 10 and a box door 11. A mounting 12 is formed on the box body 10, and the box door 11 is connected to the box body 10 and configured to expose or block the mounting 12, or to open and close the box body 10. A plate 20 is installed on the mounting 12. Here, the box door 11 may be rotatably connected to the box body 10.

[0011] Specifically, the box 10 may 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 a mounting 12, in which the second side wall 15 and the third side wall 17 are disposed opposite each other. The first side wall 13 is disposed opposite the box door 11 and is located between the second side wall 15 and the third side wall 17. Opposite sides of the first side wall 13 are connected to the second side wall 15 and the third side wall 17, respectively.

[0012] Referring to Figure 4, the box further includes a top wall 18 and a bottom wall 19. As can be easily understood, the top wall 18 is located at the top of the box 10, and the bottom wall 19 is located at the bottom of the box 10. The top wall 18, the first side wall 13, and the bottom wall 19 are arranged in this order along the height direction of the current collection box. The arrangement direction of the box door 11 and the first side wall 13 is a first direction (also referred to as the width direction of the box), and the arrangement direction of the top wall 18 and the bottom wall 19 is a second direction (also referred to as the height direction of the box), with the first direction being perpendicular to the second direction.

[0013] Referring to FIG. 2, the current collecting box further includes a plate 20. The plate 20 may be attached to the box mounting 12 and configured to have the electrical element assembly 14 attached thereto. The plate 20 is disposed between the box door 11 and the first side wall 13 and is disposed opposite the box door 11. The first side wall 13, the plate, and the box door 11 may be disposed along the first direction or the width direction of the current collecting box. Opposite sides of the plate 20 may be connected to the second side wall 15 and the third side wall 17, respectively.

[0014] Because the electric element assembly 14 includes many electric elements, if they were all arranged on the same plane, the box would become very large. To further reduce the volume of the current collector box, there may be multiple plates 20, and the multiple plates 20 may be arranged along the first direction (also referred to as the width direction of the current collector box). In some embodiments, the plate 20 may include a first plate 21 and a second plate 23 arranged sequentially along the first direction (also referred to as the width direction of the current collector box). The first plate 21 and the second plate 23 are configured to mount the electric element assembly 14. The second plate 23 is located between the first plate 21 and the box door 11, and at least a portion of the orthogonal projection of the first plate 21 onto the box door is located above the orthogonal projection of the second plate onto the box door along the width direction of the box. In the embodiment of the present application, the arrangement direction of the box door and the first side wall is a first direction, the electrical element assembly 14 is arranged within the mounting, and the positive and negative portions of the electrical element assembly 14 are arranged along the first direction, so that the distance between the electrical elements at both ends is relatively short, the required wiring distance between the electrical elements is short, and the work of the worker is made easier.

[0015] The plate 20 may include a third plate 25 configured to mount the electrical element assembly 14. The first plate 21 is closer to the first side wall 13 than the second plate 23 and the third plate 25, the third plate 25 is closer to the box door than the first plate 21 and the second plate 23, and the second plate 23 is located between the first plate 21 and the third plate 25. Along the width direction of the current collecting box, at least a portion of the orthogonal projection of the first plate 21 onto the box door 11 is located above the orthogonal projection of the third plate 25 onto the box door 11. In some embodiments, the first plate 21 may be attached to the first side wall 13. In other embodiments, opposite sides of the first plate 21 may be connected to the second side wall 15 and the third side wall 17, respectively.

[0016] The current collector box further comprises an electrical element assembly 14. The electrical element assembly 14 is mounted within the mount 12 of the box 10 and may comprise a spaced apart 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 the external distribution box and electrically connected to the positive terminal of the battery pack, while the negative electrode portion 80 is configured to be connected to the negative output terminal of the external distribution box and electrically connected to the negative terminal of the battery pack.

[0017] See FIG. 3. In some embodiments, the external distribution box can be a multi-cluster, and the collector box can collect power from the external multi-cluster distribution box and control the current and / or voltage input to the battery pack. The positive output terminal of the external multi-cluster distribution box (see B1+...B4+ in FIG. 3) can be connected to the collector box via a wire harness, so that the positive output terminal of the external multi-cluster distribution box, the first circuit breaker 741, the positive fuse, the positive high-voltage relay, and the positive interface are electrically connected in sequence, and the positive interface is electrically connected to the positive pole of the battery pack. The negative output terminal of the external multi-cluster distribution box (see B1-...B4- in FIG. 3) can be connected to the collector box via a wire harness, so that the negative output terminal of the external multi-cluster distribution box, the second circuit breaker 743, the negative fuse, the negative high-voltage relay, and the negative interface are electrically connected in sequence, and the negative interface is electrically connected to the negative pole of the battery pack. Therefore, the external multi-cluster distribution box can be electrically connected to the battery pack through the electrical element assembly 14 to realize the charging and discharging functions of the battery pack. In some embodiments, the maximum current of the single-cluster distribution box may be 112 A or less.

[0018] For example, an external distribution box may have four clusters, and the four-cluster distribution box may collect power through a current collecting box according to an embodiment of the present application to charge the battery pack. The current collecting box according to the embodiment of the present application serves as a bridge between the battery pack and the outside, allowing the battery pack to be charged and discharged through the current collecting box.

[0019] In some embodiments, the positive electrode portion 70 and the negative electrode portion 80 are arranged along a first direction (also referred to as the width direction of the current collector box). In these embodiments, the positive electrode portion 70 and the negative electrode portion 80 are each arranged along the first direction, resulting in a rational layout, a more compact structure, and a smaller area occupied by the current collector box.

[0020] Referring to Figure 9, the positive electrode part 70 may specifically include a positive electrode fuse 71, a positive electrode high-voltage relay 72, and a positive electrode interface 73. The positive electrode fuse 71, the positive electrode high-voltage relay 72, and the positive electrode interface 73 are electrically connected in sequence. The positive electrode fuse 71 is electrically connected to the positive output terminal of the external distribution box, and the positive electrode fuse 73 is electrically connected to the positive electrode of the battery pack. In this embodiment, the positive electrode part 70 includes the positive electrode fuse 71, which can be blown out in a timely manner when the current exceeds a predetermined value, thereby protecting the circuit safety of the positive electrode part 70.

[0021] The electric element assembly 14 further includes a circuit breaker 74. The circuit breaker 74 includes a first circuit breaker 741 mounted on the mounting 12. In the embodiment of the present application, the first circuit breaker 741 is provided electrically connected to the positive electrode portion 70, so that if a safety hazard occurs, the first circuit breaker 741 is shut off in a timely manner to protect the safety of the circuit. In addition, the first circuit breaker 741 and the positive electrode portion 70 are arranged along the first direction, and the first circuit breaker 741 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 rational layout.

[0022] Referring to FIG. 8 , the negative electrode unit 80 may specifically include a negative electrode fuse 81, a negative high-voltage relay 82, and a negative electrode interface 83. The negative electrode fuse 81, the negative high-voltage relay 82, and the negative electrode interface 83 are electrically connected in sequence. The negative electrode fuse 81 is electrically connected to the negative output terminal of the external distribution box, and the negative electrode interface 83 is electrically connected to the negative electrode of the battery pack. In this embodiment, the negative electrode unit 80 includes a negative electrode fuse that can be blown out in a timely manner when the current exceeds a predetermined value, thereby protecting the circuit safety of the negative electrode unit 80. The positive electrode unit 70 and the negative electrode unit 80 are each provided with a fuse, which can protect the positive electrode unit 70 and the negative electrode unit 80 and improve the circuit safety.

[0023] The circuit breaker 74 further includes a second circuit breaker 743. The second circuit breaker 743 is attached to the mounting 12. The second circuit breaker 743 is electrically connected to the negative electrode portion 80 and is arranged along the first direction together with the negative electrode portion 80. In the embodiment of the present application, by installing the second circuit breaker 743 electrically connected to the negative electrode portion 80, if a safety issue occurs, the second circuit breaker 743 can be shut off in a timely manner to protect the safety of the circuit. In addition, the second circuit breaker 743 may be closer to the first side wall 13 than the positive electrode portion 70 and the negative electrode portion 80.

[0024] Specifically, the first circuit breaker 741, the positive fuse 71, the positive high-voltage relay 72, and the positive interface 73 are electrically connected in sequence. The positive interface is configured to electrically connect with the positive electrode of the battery pack, and the first circuit breaker 741 is configured to electrically connect with the positive output terminal of an external distribution box. The second circuit breaker 743, the negative fuse 81, the negative high-voltage relay 82, and the negative interface 83 are electrically connected in sequence. The negative interface is configured to electrically connect with the negative electrode of the battery pack, and the second circuit breaker 743 is configured to connect with the negative output terminal of an external distribution box. In this embodiment, the first circuit breaker 741 and the second circuit breaker 743 are configured to open and close the entire high-voltage circuit. Specifically, the first circuit breaker 741 is configured to mainly open and close the positive electrode section, and the second circuit breaker 743 is configured to mainly open and close the negative electrode section. The first circuit breaker 741 and the second circuit breaker 743 work together to open or close the entire high voltage circuit.

[0025] If only the first circuit breaker 741 is provided in the positive electrode unit 70, even if the first circuit breaker 741 is disconnected, high voltage may be applied to the negative electrode of the battery pack in unexpected situations such as reverse connection or lightning strike, potentially damaging the battery pack through a path caused by the negative electrode and causing a safety hazard. If only the second circuit breaker 743 is provided in the negative electrode unit 80, even if the second circuit breaker 743 is disconnected, the positive electrode unit 70 may still be in a high voltage state, potentially causing a safety hazard. In this embodiment, the first circuit breaker 741 is connected to the positive output terminal of the distribution box in the positive electrode unit 70, and the second circuit breaker 743 is connected to the negative output terminal of the distribution box in the negative electrode unit 80, thereby further protecting the circuit.

[0026] In the embodiment of the present application, fuses are provided in both the positive electrode unit 70 and the negative electrode unit 80, and circuit breakers are connected to both the positive electrode unit 70 and the negative electrode unit 80, thereby simultaneously protecting the positive electrode unit 70 and the negative electrode unit 80 and increasing circuit safety. Here, the first electric element assembly 14 further includes a first copper bar 701 and a second copper bar 801. The positive electrode unit 70 is electrically connected to the positive output terminal of an external distribution box via the first copper bar 701, and the negative electrode unit 80 is electrically connected to the negative output terminal of the external distribution box via the second copper bar 801, resulting in less heat generation.

[0027] The first copper bar 701 may be attached to the first plate 21, and the second copper bar 801 may be attached to the first plate 21. Since the second copper bar 801 and the first copper bar 701 are installed at a distance from each other, the first copper bar 701 can be easily connected to the positive electrode part 70 and the positive output terminal of the external distribution box, and the second copper bar 801 can be easily connected to the negative electrode part 80 and the negative output terminal of the external distribution box, resulting in a compact structure.

[0028] In some embodiments, the first copper bar 701 may specifically include a cluster high-voltage positive wiring copper bar 75 and a cluster high-voltage positive-circuit breaker copper bar 76. The second copper bar 801 may specifically include a cluster high-voltage negative wiring copper bar 85 and a cluster high-voltage negative-circuit breaker copper bar 86. The positive output terminal of the distribution box may be connected to the cluster high-voltage positive wiring copper bar 75 via a wiring harness and then connected to the first circuit breaker 741 via the cluster high-voltage positive-circuit breaker copper bar 76. The first circuit breaker 741 is electrically connected to the positive fuse 71 via the circuit breaker output positive copper bar 71, the positive fuse 71 is connected to the positive high-voltage relay 72 via a copper bar, the positive high-voltage relay 72 is connected to the positive output wiring harness via the output wiring harness copper bar, and the positive interface 73 is connected to the positive output wiring harness. The positive copper bar 77 of the circuit breaker output may be attached to the second plate 23 on the side facing the box door 11 .

[0029] The negative output terminal of the distribution box is connected to the cluster high voltage negative wiring copper bar 85 via a wiring harness, and then connected to the second circuit breaker 743 via the cluster high voltage negative circuit breaker copper bar. The circuit breaker output negative copper bar 87 is electrically connected to the negative fuse 81, so that the negative fuse 81 is connected to the negative high voltage relay 82 via the copper bar, and the negative high voltage relay 82 is connected to the negative output wiring harness via the copper bar, and the negative output wiring harness is connected to the negative interface 83. The circuit breaker output negative copper bar 87 may be attached to the side of the third plate 25 facing the box door 11.

[0030] Referring to Figure 7, a pre-charge resistor 91 may be installed to protect the fuses and relays by preventing excessive charging current at the moment the power is turned on, thereby avoiding damage to the fuses and switching devices such as relays that may be caused by excessive instantaneous current. The pre-charge resistor 91 is provided on the side of the first plate 21 facing the second plate 23.

[0031] In some embodiments, the circuit breakers 74 (including the first circuit breaker 741 and the second circuit breaker 743) may be attached to the first plate 21 on a side closer to the box door 11, the positive electrode unit 70 may be attached to the second plate 23 on a side closer to the box door 11, and the negative electrode unit 80 may be attached to the third plate 25 on a side closer to the box door 11. In these embodiments, a plurality of plates 20 are provided, and the circuit breakers 74, the positive electrode unit 70, and the negative electrode unit 80 are respectively attached to different plates, thereby realizing the arrangement of the circuit breakers 74, the positive electrode unit 70, and the negative electrode unit 80 along the first direction.

[0032] In some embodiments, in addition to the positive electrode portion 70 and the negative electrode portion 80, the electric element assembly 14 further includes a control unit 100. The control unit 100 is attached to the mounting 12 and configured to be electrically connected to the positive electrode portion 70, the negative electrode portion 80, and the battery pack. The control unit 100 is further electrically connected to a communication signal terminal of an external distribution box and configured to detect the status of the external distribution box and the battery pack.

[0033] In the related art, energy storage systems typically include a current collection box in the form of an independent equipment cabinet, which collects current from an external distribution box. While the function of the current collection box is relatively simple, controlling the input or output current and voltage requires the use of a separate electrical control cabinet in the form of an independent equipment cabinet, which occupies a large amount of space. In the present embodiment, the electrical element assembly 14 mounted within the box includes a positive electrode portion, a negative electrode portion, and a control unit. The external distribution box can be connected to the positive and negative terminals of the battery pack via the positive and negative electrode portions, respectively. The positive and negative electrode portions collect current, and the control unit electrically connects with the communication signal terminals of the external distribution box, detecting the status of the external distribution box and the battery pack, thereby further enhancing the functionality of the current collection box. Furthermore, compared to the conventional solution in which the control unit is installed in an independent box and the positive and negative electrode units are installed in separate boxes, in the embodiment of the present application, the control unit, the positive and negative electrode units are installed in the same box, and the control unit and the positive electrode unit are arranged along the length or width of the current collecting box, reducing the use of one box and making the structure between the control unit and the positive and negative electrode units more compact.

[0034] In the present embodiment, the control unit 100 is installed within the box and is configured to be electrically connected to the communication signal terminal of the external distribution box, thereby achieving the following functions: First, the communication signal terminal of the external distribution box can supply power to the control unit. Second, the communication signal terminal of the external distribution box can detect the status of the external distribution box and battery pack in real time. If a fault occurs in the distribution box, the communication signal terminal can provide feedback to the collector box, which then provides feedback to the driving console. Third, the communication signal terminal can detect and provide feedback to the battery pack status, such as the operating voltage, operating current, remaining battery power, and remaining battery life of the battery system, in real time. Compared to related art, energy storage systems typically include an electrical control box and a collector box in the form of a separate equipment cabinet, but the collector box provided in the present embodiment has more comprehensive functions, a compact structure, and occupies less space.

[0035] The cluster distribution box outside the collector box specifically includes a positive output terminal, a negative output terminal, and a communication signal terminal. A wiring inlet 90 is formed on the side wall of the box and configured to connect an external wiring harness. The wiring inlet 90 may specifically include a positive wiring inlet, a negative wiring inlet, and a communication wiring inlet. The high-voltage wiring harness connected to the distribution box can be attached to the wiring inlet 90 via a cable gland, which locks the passing wiring harness and improves the protection level of the box. This prevents foreign objects and moisture from entering the collector box and causing failure or short circuits.

[0036] The communication signal terminal enters the box through a communication wiring inlet opening in the side wall of the housing, and the positive output terminal of the external distribution box connected to the BMS control 31 enters the box through a positive wiring inlet opening in the side wall of the box, is connected to the first copper bar 701, and is connected to the first circuit breaker 741. The negative output terminal enters the box through a negative wiring inlet opening in the side wall of the box, is connected to the second copper bar 801, and is connected to the second circuit breaker 743.

[0037] In some embodiments, the control unit 100 and the positive electrode unit 70 may be arranged along the length of the current collector box, and the positive electrode unit 70 and the negative electrode unit 80 may be arranged along the width of the current collector box, i.e., along the first direction, resulting in a more compact structure and occupying less space.

[0038] 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 sequentially along the length of the current collection box. In these embodiments, the control unit 100 is provided in two sets, with the first sub-control unit 101 and the second sub-control unit 103 located on both sides of the positive electrode unit 70 and the negative electrode unit 80. Specifically, the first sub-control unit 101 may be attached to the second side wall 15, and the second sub-control unit 103 may be attached to the third side wall 17.

[0039] In some embodiments, the second sub-controller 103 of the controller 100 includes a BMS controller 31. The BMS controller 31 is electrically connected to a communication signal terminal of an external distribution box and is configured to be electrically connected to the positive terminal 70 and the negative terminal 80, respectively.

[0040] In some embodiments, the electrical element assembly 14 further comprises an adjustment indicator 200 mounted on the side of the box door 11 away from the mounting 12. The adjustment indicator 200 is electrically connected to the BMS control 31 and configured to adjust and indicate the operating state of the battery pack.

[0041] In the embodiment of the present application, there may be multiple sets of electric element assemblies 14. The specific structure of the electric element assemblies 14 has been described above, and each electric element assembly 14 includes the above-mentioned positive electrode section 70, negative electrode section 80, control section, etc., but the specific contents will not be described here.

[0042] The electric element assemblies 14 may be configured to be electrically connected to an external multi-cluster distribution box or to a battery pack. Multiple sets of electric element assemblies 14 are arranged from top to bottom along the height direction of the current collection box. In this way, the current collection box according to the embodiment of the present application can simultaneously collect current from multiple battery packs, occupy a small area, be easy to use, and be less expensive.

[0043] In the embodiment of the present application, the electric element assembly 14 is configured to be electrically connected to an external multi-cluster distribution box and also to be electrically connected to the battery packs, so that the electric element assembly 14 can realize the merging of the external multi-cluster distribution boxes, and the external multi-cluster distribution boxes collect power through the electric element assembly 14, and then charge and discharge the battery packs. By providing multiple sets of electric element assemblies 14 within the box and configuring them to be electrically connected to multiple battery packs, the power collection needs of multiple battery packs can be met, improving the situation in which current collection boxes in the related art cannot meet the power collection needs of multiple battery packs.

[0044] In some embodiments, for ease of explanation, the plurality of battery packs includes at least a first battery pack and a second battery pack, and the plurality of sets of electric element assemblies 14 includes at least a first electric element assembly 14 and a second electric element assembly 14. The box mounting includes a first mounting 121 and a second mounting 123 arranged from top to bottom along the height direction of the current collection box.

[0045] The first electrical element assembly 14 is mounted to the first mounting 121 and is electrically connected to an external distribution box and also electrically connected to the first battery pack, where there may be multiple clusters of external distribution boxes. The second electrical element assembly 14 is mounted to the second mounting 123 and is electrically connected to an external distribution box and also electrically connected to the second battery pack, where there may be multiple clusters of external distribution boxes.

[0046] In some embodiments, one battery pack can be connected to a four-cluster distribution box, and if there is an eight-cluster external distribution box, the first electrical element assembly 14 can collect power from the four-cluster external distribution box cluster and is configured to charge the first battery pack, while the second electrical element assembly 14 can collect power from the other four-cluster external distribution box and is configured to charge the second battery pack. In the present embodiment, the collection box can be used to simultaneously perform high-voltage collection and low-voltage control for two or more battery packs, resulting in a small footprint, ease of use, and lower cost.

[0047] Referring to FIG. 4, the first mounting 121 may include a first mounting space 1211 and a second mounting space 1213 arranged along the height direction of the current collecting box. Specifically, in the first mounting 121, at least a portion of the orthogonal projection of the first plate 21 onto the box door (or the first side wall) along the width direction of the current collecting box is located higher than the orthogonal projection of the second plate 23 onto the box door 11 (or the first side wall). Along the width direction of the current collecting box, at least a portion of the orthogonal projection of the first plate 21 onto the box door is located higher than the orthogonal projection of the third plate 25 onto the box door 11. In this way, at least a portion of the first plate 21 directly faces the box door 11, forming the first mounting space 1211.

[0048] A portion of the first plate 21, the second plate 23, and the third plate 25 form a second mounting space 1213. The second mounting space 1213 may specifically include a first sub-mounting, a second sub-mounting, and a third sub-mounting. A portion of the first plate and the second plate 23 define the first sub-mounting, the second plate 23 and the third plate 25 define the second sub-mounting, and the third plate 25 and the box door define the third sub-mounting. At least a portion of the first circuit breaker 741 is mounted in the first mounting space 1211, and at least a portion of the second circuit breaker 743 is mounted in the first mounting space 1211.

[0049] As a specific mounting method, opposite sides of the first plate 21 may be connected to the second and third side walls, respectively, by welding or screwing, etc., opposite sides of the second plate 23 may be connected to the second and third side walls, respectively, by welding or screwing, etc., and opposite sides of the third plate 25 may be connected to the second and third side walls, respectively, by welding or screwing, etc. In this way, the first plate 21, the second plate 23, and the third plate 25 are attached to the box body. This makes the structure more compact, and reduces the volume and occupied space of the box body.

[0050] In the second attachment 123, the specific positional relationship between the first plate 21, the second plate 23 and the third plate 25 may refer to the specific positional relationship between them in the first attachment 121.

[0051] In some embodiments, each electric element assembly 14 includes the above-described positive electrode portion 70 and negative electrode portion 80, and the positive electrode portion 70 is configured to be electrically connected to the positive output terminal of an external distribution box and electrically connected to the positive electrode of the battery pack, while the negative electrode portion 80 is configured to be connected to the negative output terminal of the external distribution box and electrically connected to the negative electrode of the battery pack. In this way, one electric element assembly 14 corresponds to one battery pack, and multiple electric element assemblies 14 can correspond to multiple battery packs, and there may be a one-to-one correspondence between the electric element assemblies 14 and the battery packs.

[0052] Referring to FIG. 3, because multiple clusters of distribution boxes can be connected, the overcurrent capacity of a single positive interface and a single negative interface cannot meet usage demands. Therefore, multiple positive electrode parts 70 and multiple negative electrode parts 80 are installed, with a one-to-one correspondence between the positive electrode parts 70 and the negative electrode parts 80. That is, each electric element assembly 14 has multiple positive electrode parts 70 and multiple negative electrode parts 80. Therefore, each electric element assembly 14 has multiple positive electrode interfaces (see charging stand 1DC+ and charging stand 2DC+ in FIG. 3) and multiple negative electrode interfaces (see charging stand 1DC- and charging stand 2DC- in FIG. 3), with a one-to-one correspondence between the positive electrode interfaces and the negative electrode interfaces. The combination of one positive electrode interface and one negative electrode interface forms a charging and discharging interface. Each of the multiple positive electrode parts 70 is electrically connected to the positive electrode of a battery pack, and each of the multiple negative electrode parts 80 is electrically connected to the negative electrode of the battery pack. By providing a plurality of positive electrode parts 70 and a plurality of negative electrode parts 80, a larger current can be supplied to one battery pack.

[0053] In some embodiments, since the maximum current input by the four-cluster distribution box is about 448 A and the overcurrent capacity of a single charging / discharging interface is about 250 A, two positive pole parts 70 and two negative pole parts 80 are provided and configured to distribute current to meet the overcurrent demand.

[0054] In some embodiments, the control unit 100 can distinguish between two sets of battery packs for user convenience. Each electric element assembly 14 includes a control unit, which is electrically connected to the electric element assembly 14 and configured to be electrically connected to the battery pack, and which is further electrically connected to a communication signal terminal of an external distribution box and configured to detect the status of the external distribution box and the battery pack. In this way, one battery pack is controlled by one control unit, and the control is accurate.

[0055] In some embodiments, the control unit may include a first control unit and a second control unit. The first control unit is attached to the first mounting 121, and the second control unit is attached to the second mounting 123. The second control unit is electrically connected to the first battery pack and the first electric element assembly 14, respectively, and detects the state of the external distribution box, and the second control unit is electrically connected to the first battery pack. The second battery pack and the second electric element assembly 14 detect the states of the external distribution box and the second battery pack, respectively.

[0056] Since the first battery pack and the second battery pack are controlled separately by the first control unit and the second control unit, 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.

[0057] In some embodiments, in each electric element assembly 14, the control unit includes two parts, a first sub-control unit 101 and a second sub-control unit 103, which are electrically connected. Along the length of the box, the first sub-control unit and the second sub-control unit are located on opposite sides of the box, and specifically may be attached to the second side wall and the third side wall, respectively.

[0058] Specifically, the second sub-controller is attached to the third side wall of the box on the side facing the second side wall of the box, and the first sub-controller is attached to the second side wall of the box on the left side of the box, on the side facing the third side wall of the box.

[0059] In some embodiments, along the width direction of the current collecting box, the orthogonal projection of the first sub-control unit 101 onto the first side wall is located above the orthogonal projection of the second plate onto the first side wall.

[0060] In some embodiments, the orthogonal projection of the second sub-control unit 103 onto the first side wall is located above the orthogonal projection of the second plate onto the box door.

[0061] In some embodiments, along the width direction of the current collecting box, the orthogonal projection of the first sub-controller 101 onto the first side wall is located higher than the orthogonal projection of the second plate onto the first side wall. At the same time, the orthogonal projection of the second sub-controller onto the first side wall is located higher than the orthogonal projection of the second plate onto the first side wall.

[0062] 5 and 6, the first sub-controller is configured to control the indicator light module 41 and the switch module 43, and may include a signal relay 33, an air switch 35, a wiring duct 36, a wiring terminal 37, an AC / DC power supply 38, etc. The second sub-controller 103 may include a BMS control 31. The communication signal terminal can supply power to the controller via an AC / DC power supply in the current collector box.

[0063] Specifically, in the first mounting space 1211, a first receiving plate may be attached to the second side wall of the box body on the side facing the third side wall of the box body. The first sub-control unit is attached to the first receiving plate and is attached to the second side wall via the first receiving plate. A second receiving plate may be attached to the third side wall of the box body on the side facing the third side wall of the box body, and the second sub-control unit is attached to the second receiving plate and is attached to the third side wall via the second receiving plate.

[0064] In some embodiments, the BMS control 31 is attached to the second support plate, configured to manage the batteries, and attached to the third side wall via the second support plate. A communication signal terminal of an external distribution box can enter the collection box through a wiring inlet and then be connected to the BMS control 31. The BMS battery management system is also configured in multiple sets, with one BMS battery management system configured to control one set of battery systems. In some implementations, two sets of battery systems are configured and two BMS battery management systems are configured, so that each can manage two sets of battery systems.

[0065] Specifically, a guide rail can be attached to the first backing plate, and the wiring terminal 37, signal relay 33, and air switch 35 are all attached to the guide rail and snap-fitted to the guide rail. An AC / DC power supply 38 is attached to the first backing plate.

[0066] In some specific embodiments, indicator lights and switches may be mounted on the box door and located on the outside of the box door away from the mounting of the box door. The indicator lights and switches are connected to wiring terminals via a wire harness, and the wiring terminals are connected to the signal relay and air switch via a wire harness. The wire harness may be bundled into a wiring duct and connected to the BMS control 31, which outputs signals to the driver's console via the wire harness.

[0067] In some embodiments, each first electric element assembly 14 further includes an auxiliary circuit section. The auxiliary circuit section may be attached to the second plate 23 and the third plate 25. The auxiliary circuit section 300 includes an auxiliary circuit positive fuse 301, an auxiliary circuit negative fuse 303, an auxiliary circuit positive interface 305, and an auxiliary circuit negative interface 307. The auxiliary circuit positive fuse 301 and the auxiliary circuit positive interface 305 may be attached to the second plate 23, and the auxiliary circuit negative fuse and the auxiliary circuit negative interface 307 may be attached to the third plate 25. Here, the first circuit breaker 741, the auxiliary circuit positive fuse 301, and the auxiliary circuit positive interface 305 are electrically connected in sequence, and the auxiliary circuit positive is electrically connected to the positive terminal of the auxiliary circuit box.

[0068] The second circuit breaker 743, the auxiliary circuit negative fuse 303 and the auxiliary circuit negative interface 307 are electrically connected in sequence, and the auxiliary circuit negative pole is electrically connected to the negative pole of the auxiliary circuit box.

[0069] The auxiliary circuit positive interface 305 and the auxiliary circuit negative interface 307 are configured to connect to the auxiliary circuit box, and can also charge the auxiliary circuit box. In addition, the auxiliary circuit positive fuse 301 and the auxiliary circuit negative fuse 303 can meet the need for separate fuses for each circuit.

[0070] Specifically, the positive output terminal of the distribution box is connected to the cluster high-voltage positive wiring copper bar through the wiring harness, and is connected to the circuit breaker through the cluster high-voltage positive wiring copper bar of the circuit breaker. The circuit breaker is connected to the auxiliary circuit positive fuse 301, which is connected to the auxiliary circuit positive output wiring harness through the auxiliary circuit positive copper bar, and the auxiliary circuit positive interface 305 is connected to the auxiliary circuit positive output wiring harness.

[0071] The negative output terminal of the distribution box is connected to the cluster high voltage negative wiring copper bar via a wiring harness, and is connected to the circuit breaker via the cluster high voltage negative wiring copper bar of the circuit breaker. The circuit breaker is connected to the auxiliary circuit negative fuse 303, which is connected to the auxiliary circuit negative output wiring harness via the auxiliary circuit negative copper bar, and the auxiliary circuit negative interface 307 is connected to the auxiliary circuit negative output wiring harness.

[0072] In some embodiments, each first electrical element assembly 14 further includes a surge protector 400. The surge protector 400 may be attached to the second plate 23 and 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 electrically connected in sequence to form an anti-surge protection circuit. The provision of the anti-surge protection circuit is configured to prevent damage to equipment due to lightning strikes.

[0073] Specifically, the first circuit breaker 741 is electrically connected to the positive copper bar of the circuit breaker output, the second circuit breaker 743 is electrically connected to the negative copper bar of the circuit breaker output, and one end of a first surge fuse is connected to the positive copper bar of the circuit breaker output via a wiring harness, thereby 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, one end of the surge protector is connected in series to a second surge fuse via a wiring harness, and the second surge fuse is connected to the negative copper bar of the circuit breaker output via a wiring harness, thereby electrically connecting the second surge fuse to the second circuit breaker 743. The positive copper bar of the circuit breaker output can be attached to the side of the second plate 23 facing the box door. The negative copper bar of the circuit breaker output can be attached to the side of the third plate 25 facing the box door.

[0074] In some embodiments, guide rails and insulating posts may be attached to the second plate 23. The guide rails are configured to secure the surge protectors, improving installation efficiency and stability. The first surge fuse and the second surge fuse are secured to the insulating posts of the backing plate.

[0075] See Figure 8. In some embodiments, an access hole may be provided in the laminate. The access hole may be a waist-shaped access hole 201. If the wire harness becomes loose, the access hole can be directly reinforced without removing the plate near the box door of the outer layer, facilitating reinforcement and maintenance.

[0076] In some embodiments, the plate can be covered with a PC film to improve insulation performance, specifically, the side of the plate facing the box door can be covered with a PC film.

[0077] In some embodiments, an insulating plate 603 configured to increase the electrical gap between the copper bars and improve insulation performance can be attached to the side away from the box door, where an acrylic insulating plate may be used as the insulating plate 603.

[0078] In some embodiments, each first electrical element assembly 14 further includes an adjustment indicator mounted on the side away from the box door and configured to adjust and indicate the operating state of the battery pack.

[0079] The adjustment instruction unit 200 may include a first operation module 40, a second operation module 50, and a warning module 60. The first operation module 40, the second operation module 50, and the warning module 60 are arranged in order from top to bottom along the height direction of the box body.

[0080] Here, the first operation module is configured to display and control the operation state of the first battery pack, and the second operation module is configured to display and control the operation state of the second battery pack.

[0081] In the embodiment of the present application, the control unit arranges the first battery pack and the second battery pack in groups, so when a failure occurs, it can intuitively identify which battery pack is causing the failure and can timely cut off the input / output of the battery pack to avoid major losses. This makes it possible to monitor the status of the distribution boxes for the two battery packs and integrate communication between the entire two battery systems and output it to the driving console.

[0082] Next, the first operation module 40 will be described. 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 can provide timely feedback and control of the state of the first battery pack. The indicator light module 41 and the switch module 43 are each electrically connected to the control unit.

[0083] Here, the display module is disposed on one side of the box door connected to the box body, and on the other side of the box door, the indicator module is disposed on one side of the display module and spaced apart from the display module.

[0084] The indicator light module 41 may include a running indicator light 411, a fault indicator light 413, a switch-on indicator light 415, an overheat indicator light 412, a 24V voltage indicator light 414, and a low SOC indicator light 416. The indicator light modules are arranged in two rows, with a first row including the running indicator lights, the fault indicator lights, and the switch-on indicator lights, and a second row including the overheat indicator light, the 24V power indicator light, and the low SOC indicator light. The indicator light modules are arranged in two rows, and the structure between the first and second rows of the indicator light modules is relatively compact, making it easy for operators to operate.

[0085] The switch module 43 may include a remote / local control switch 431, a start / stop control switch 433, and a muffler control switch 435. The remote / local control switch 431, the start / stop control switch 433, and the muffler control switch 435 are arranged in a row and are configured to be installed alongside the indicator light module. Therefore, the indicator light module 41 and the switch module 43 are installed side by side, with the first row of indicator light modules 41, the second row of indicator light modules 41, and the switch module 43 arranged from top to bottom. The space between the switch module and the indicator light module is relatively compact. The first row of indicator light modules is located higher than the display module 47. An installation space is provided between the first row of indicator light modules facing the display module and the display module. A buzzer and emergency stop switch 437 are installed in this installation space, making them easy for operators to operate and less likely to be accidentally touched. The buzzer is installed near the first row of indicator light modules and higher than the display module. The emergency stop switch is located between the buzzer and the display module 47.

[0086] The display module 47 is attached to the box door and configured to display relevant parameters and operating status. The display modules 47 are arranged to group the first battery pack and the second battery pack, and the display modules 47 of the two battery packs are independent and do not interfere with each other. The two sets of display modules 47 on the box door can monitor the battery status of the two battery systems, respectively, and in some embodiments, both sets of display modules 47 may use touch screens.

[0087] The configuration and effects of the second operation module may refer to the first operation module. The second operation module is configured to display and control the operating status of the second battery pack. Portions of the first operation module can be opened individually to reveal the internal structure, and portions of the second operation module can be opened individually to reveal the internal structure. At the same time, the entire box door can also be opened. When the box lock is released, the entire box door can be opened from the handle.

[0088] The warning module 60 includes a sign and a box lock. The ventilation unit is installed near the bottom of the box door, and the sign is installed between the ventilation unit, the box lock, and the second operation module. The box lock is configured to lock the box door and the box body, and the sign may be a high voltage warning sign.

[0089] In the embodiment of the present application, the low voltage indicator light and control switch are separately arranged for the first battery pack and the second battery pack, and the low voltage indicator light and control switch of each battery pack are independent and do not interfere with the low voltage indicator light and control switch of the other battery pack, so that the charging and discharging of the two battery packs can be controlled separately.

[0090] To improve heat dissipation, the collector box may utilize ventilation cooling in some embodiments of the present application. In some embodiments, an exhaust port 1010 is provided at the top of the box 10, and an air inlet 1030 is provided on the box door. The air inlet and the air outlet are connected to the mounting 12, respectively, and the exhaust assembly is configured to exhaust gas from the mounting 12 through the air outlet 1010. An electric element assembly 14 is mounted within the mounting 12 and configured to collect current from multiple external distribution boxes, with at least a portion of the electric element assembly 14 located in the air path between the air inlet and the air outlet. In these embodiments, air enters the box through the air inlet. When the electric element assembly 14 operates, heat is generated, and the heated air rises and passes through the electric element assembly 14, sufficiently driving the hot air released by the operation of the electric element assembly 14 upward and discharging it, preventing failure of the electric element assembly 14 caused by high temperature accumulation. The air inlet 1030 may be located near the bottom wall 19 of the box door.

[0091] In this embodiment, air is supplied from the bottom and exhausted from the top, which helps to expel more hot air and improves the heat dissipation effect. The wind absorbs the heat generated by the electric element assembly 14 and expels it from the top of the box, thereby expelling more hot air and improving the heat dissipation effect.

[0092] In some embodiments, the current collection box further includes an exhaust assembly mounted within the mounting 12, located near the top of the box, and configured to exhaust gases from the box 10 through an exhaust port 1010. Providing the exhaust assembly and exhaust port 1010 at the top can improve heat dissipation efficiency.

[0093] In some embodiments, the exhaust assembly includes a fan, a first filter 601, and a second filter 602. The fan is configured to draw air into the enclosure, dissipating heat from the enclosure's internal components and discharging gases from the enclosure through the exhaust port, i.e., to the outside. The first filter 601 is attached to the enclosure 10 and configured to cover the exhaust port 1010. The air intake assembly includes a second filter 602. The second filter 602 is attached to the enclosure door and configured to cover the air intake port. By covering the air intake port, the second filter 602 prevents outside air from bringing particulate matter into the enclosure and adversely affecting the electrical element assembly 14. The first filter 601 covers the exhaust port, preventing outside dust from entering the enclosure through the exhaust port. The fan may be, but is not limited to, a Roots blower, a centrifugal fan, an axial fan, a Jäger blower, or the like.

[0094] The first filter 601 and the second filter 602 may both be louver filters, and the fan may include a louver fan. The louver fan is connected to the BMS control 31 via a wire harness, and the opening and closing of the fan is controlled by a program in the BMS control 31 to achieve ventilation and cooling inside the current collection box.

[0095] Here, a 323mm*323mm louver filter set can be used for the air intake, and two 204mm*204mm louver filter sets and two 24VDC axial fans can be used for the exhaust, achieving an IP55 protection level and an air flow rate of 98m 3 / h can be reached.

[0096] In some embodiments, the louver fan may be connected to the BMS control 31 via a wire harness, and a program in the BMS control 31 controls the opening and closing of the fan to achieve ventilation cooling within the current collection box.

[0097] In some embodiments, the side of the plate facing the air intake is configured to mount an electrical element assembly 14, and along the first direction, the orthogonal projection of at least a portion of the electrical element assembly 14 onto the box door is located above the air intake, and / or the orthogonal projection of at least a portion of the electrical element assembly 14 onto the box door is located within the air intake.

[0098] Therefore, the air entering the air inlet can pass through the electric element assembly 14 on the plate, resulting in better heat dissipation.

[0099] In some embodiments, each of the multiple plates may have a through-hole that penetrates along the first direction. In these embodiments, all of the plates are provided with a through-hole that penetrates along the first direction. The through-hole is configured for installation of the electric element assembly 14 or for maintenance. After external air enters between the third plate 25 and the box door through the air intake, it can enter between the second plate 23 and the third plate 25 through the through-hole, and then between the first layer substrate 21 and the second plate 23 through the through-hole, which helps to dissipate heat.

[0100] In an embodiment of the present invention, after entering the box, the outside air may be divided into at least two paths: one path enters between the first plate 21 and the second plate 23 and absorbs heat from some of the electric element assemblies 14 attached to the first plate 21, and the other path enters between the second plate 23 and the box door and absorbs heat from some of the electric element assemblies 14 attached to the second plate 23, and is then discharged through an exhaust port provided in the top wall. In other words, the heat from the electric element assemblies 14 is dissipated simultaneously through two paths.

[0101] In some embodiments, at least a portion of the orthogonal projection of the first plate 21 onto the box door is located above the orthogonal projection of the second plate 23 onto the box door along the first direction. That is, at least a portion of the first plate 21 can be formed directly opposite the box door, and this portion is located above the second plate 23 and the third plate 25. In other words, the second plate and the third plate are not provided between at least a portion of the plates 21 and the box door. In this way, one path of gas entering between the first layer 21 and the second layer and one path of gas entering between the second layer and the box door can merge in the space formed by the first layer 21 and the box door directly facing each other, allowing the gas to be sufficiently discharged from the exhaust port, which contributes to heat dissipation.

[0102] An exhaust port 1010 is formed in the top wall 18, and at least a part of the orthogonal projection of the second plate 23 onto the top wall 18 along the height direction of the current collection box is located within the exhaust port 1010. In this way, air can easily come out from the exhaust port.

[0103] In some embodiments, the box further comprises an insulating plate 603 attached to the side of at least one plate away from the box door. In this way, increasing the electrical gap, such as a copper bar, between the electrical element assemblies 14 improves heat dissipation and improves insulation performance.

[0104] In a second aspect, embodiments of the present application also provide an energy storage system including the power box of any of the above embodiments. [Explanation of symbols]

[0105] 10 box body 11 Box Door 12 Installation 121 First installation 123 Second installation 1211 First mounting space 1213 Second mounting space 13 First side wall 14 Electrical element assembly 15 Second side wall 17 Third side wall 18 Top Wall 19 Bottom wall 1010 Exhaust port 1030 Air supply port 20 plates 21 Plate 1 23 Second Plate 25 Third Plate 31 BMS Control 33 Signal Relay 35 Air Switch 36 Wiring duct 37 Wiring terminal 38 AC / DC power supply 40 First Operation Module 41 Indicator module 411 Operation indicator light 413 Malfunction indicator light 415 Switch-on indicator light 412 Overheat indicator light 414 24V voltage indicator 416 Low SOC indicator light 43 Switch Module 431 Remote / Local Control Switch 433 Start / Stop Control Switch 435 silencer control switch 437 Emergency Stop Switch 45 Buzzer 47 Display Module 50 Second Operation Module 60 Warning Module 601 First filter 602 Second Filter 603 Insulating board 70 Positive electrode 71 Positive Fuse 72 Positive high voltage relay 73 Positive interface 74 Circuit Breaker 741 First Circuit Breaker 743 Second Circuit Breaker 701 First Copper Bar 75 cluster high voltage positive wiring copper bar 76 Cluster High Voltage Positive Electrode - Circuit Breaker Wiring Copper Bar 77 Circuit Breaker - Output Positive Copper Bar 80 negative electrode 801 Second Copper Bar 81 Negative Fuse 82 Negative high voltage relay 83 Negative electrode interface 85 cluster high voltage negative wiring copper bar 86 Cluster high voltage negative pole - Circuit breaker wiring copper bar 87 Circuit Breaker - Output Negative Copper Bar 90 Wiring inlet 91 Precharge resistor 100 control section 101 First sub-control unit 103 Second sub-control section 200 Adjustment instruction section 300 Auxiliary circuit section 301 Auxiliary circuit positive fuse 303 Auxiliary circuit negative fuse 305 Auxiliary circuit positive interface 307 Auxiliary circuit negative interface 400 Surge Protection Unit 401 First surge fuse 405 First surge protection device 403 Secondary surge protection device.

Claims

1. A current collection box, A box (10), and an electric element assembly mounted in the box (10), the electric element assembly comprising a positive electrode portion (70), a negative electrode portion (80), and a control portion (100), the positive electrode portion (70) being electrically connected to a positive output terminal of an external distribution box and configured to be electrically connected to a positive electrode of a battery pack, the negative electrode portion (80) being connected to a negative output terminal of the external distribution box and configured to be electrically connected to a negative electrode of the battery pack, the control portion (100) being electrically connected to a communication signal terminal of the external distribution box and configured to detect states of the external distribution box and the battery pack, the control portion (100) and the positive electrode portion (70) being arranged along the length direction or width direction of the collecting box.

2. 2. The current collecting box according to claim 1, wherein the control unit (100) and the positive electrode unit (70) are arranged along the length direction of the current collecting box, and the positive electrode unit (70) and the negative electrode unit (80) are arranged along the width direction of the current collecting box.

3. 3. The current collecting box according to claim 1 or claim 2, wherein the control unit (100) includes a first sub-control unit (101) and a second sub-control unit (103), and the first sub-control unit (101), the positive electrode unit (70), and the second sub-control unit (103) are arranged sequentially along the length direction of the current collecting box.

4. The current collection box according to claim 3, characterized in that the box body (10) further comprises a second side wall (15) and a third side wall (17) arranged opposite the first side wall (13), the first side wall (13) is located between the second side wall (15) and the third side wall (17), the first sub-control unit (101) is attached to the second side wall (15), and the second sub-control unit (103) is attached to the third side wall (17).

5. 5. The current collecting box according to claim 4, further comprising a first plate (21) and a second plate (23) attached to the mounting (12) and arranged along the width direction of the current collecting box, the first plate (21) and the second plate (23) being configured to mount the electrical element assembly together, and at least a portion of an orthogonal projection of the first plate (21) onto the first side wall (13) being located above an orthogonal projection of the second plate (23) onto the first side wall (13) along the width direction of the current collecting box.

6. Along the width direction of the current collecting box, the orthogonal projection of the first sub-control part (101) onto the first side wall (13) is located above the orthogonal projection of the second plate (23) onto the first side wall (13), and / or The current collecting box according to claim 5, characterized in that the orthogonal projection of the second sub-control part (103) onto the first side wall (13) is located above the orthogonal projection of the second plate (23) onto the first box door (11).

7. 3. The current collecting box according to claim 1 or 2, wherein the control unit includes a BMS control (31), the BMS control (31) is configured to be electrically connected to a communication signal terminal of an external distribution box, and the BMS control (31) is electrically connected to the positive electrode part (70) and the negative electrode part (80), respectively.

8. 8. The current collecting box according to claim 7, wherein the current collecting box further comprises a box door (11) connected to the box body (10), the electrical element assembly further comprises an adjustment indicator (200), the adjustment indicator (200) is attached to the box door (11) on a side remote from the mounting (12), and the adjustment indicator (200) is electrically connected to the BMS control (31) and configured to adjust and indicate the operating state of the battery pack.

9. 3. The current collection box according to claim 1 or 2, wherein the positive electrode part (70) comprises a positive electrode fuse (71), a positive electrode high-voltage relay (72), and a positive electrode interface (73), the positive electrode fuse (71), the positive electrode high-voltage relay (72), and the positive electrode interface (73) are electrically connected in sequence, the positive electrode fuse (71) is configured to be electrically connected to a positive output terminal of an external distribution box, and the positive electrode interface (73) is configured to be electrically connected to a positive electrode of a battery pack.

10. An energy storage system, comprising a current collecting box according to any one of claims 1 to 9.

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