Energy storage system

Abstract

The embodiment of the invention provides an energy storage system which comprises an energy storage cabinet, a high-voltage box and at least two energy storage converters, and the high-voltage box and the energy storage converters are located in the energy storage cabinet. The high-voltage box comprises a box body with an accommodating cavity, at least two circuit breakers electrically connected with electronic components through connecting pieces, and a first mounting bracket for mounting the circuit breakers. The first mounting bracket comprises a first main body part and a second main body part, the first main body part is mounted in the accommodating cavity through the clamping part and the first matching part, and the circuit breakers are sequentially mounted on the second main body part along the height direction of the high-voltage box. The electronic component is located on one side of the second body portion away from the circuit breaker. The supporting piece is connected with the connecting piece and the first installation support. The third body part is located on the side, away from the first body part, of the second body part and connected with the second body part and the box. According to the scheme, a plurality of circuit breakers can be installed in the high-voltage box along the height direction, so that the space of the high-voltage box is saved, and the volume of the high-voltage box is reduced.

Description

[0001] This application is a divisional application. The application number of the original application is 202411650741.4, the original application date is November 18, 2024, and the entire content of the original application is incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage, and particularly to an energy storage system. Background Art

[0003] With the development of technology, the application of photovoltaic energy storage is becoming more and more widespread. The energy storage system includes a container, a high-voltage box, and an energy storage converter. Usually, the high-voltage box is arranged inside the container, and the energy storage converter is arranged outside the container. The high-voltage box occupies a large space, resulting in the inability to integrate the energy storage converter inside the container. Summary of the Invention

[0004] In view of this, this application provides an energy storage system for reducing the volume of the high-voltage box.

[0005] This application provides an energy storage system, which includes an energy storage cabinet, a high-voltage box, and at least two energy storage converters. The high-voltage box and the energy storage converters are located in the energy storage cabinet, and the energy storage converters are electrically connected to the high-voltage box. The high-voltage box includes: A box body, which is provided with a receiving cavity; Electronic components, which are located in the receiving cavity; At least two circuit breakers, which are electrically connected to the electronic components through connectors; A first mounting bracket for mounting the circuit breaker on the box body; Wherein, the first mounting bracket includes a first main body portion and a second main body portion connected to each other. The first main body portion is detachably mounted in the receiving cavity. Along the height direction of the high-voltage box, each circuit breaker is sequentially mounted on the second main body portion. The circuit breaker can be mounted on the high-voltage box or disassembled from the high-voltage box along with the first mounting bracket. The electronic components are located on the side of the second main body portion away from the circuit breaker. The high-voltage box further includes at least one support member, one end of the support member is connected to the connector, and the other end is connected to the first mounting bracket; The box body is provided with a clamping portion, and the first mounting bracket is provided with a first mating portion. The clamping portion is arranged on the bottom wall of the receiving cavity and protrudes away from the bottom wall. The included angle between the clamping portion and the bottom wall is an acute angle. The space between the clamping portion and the bottom wall is a clamping space, and at least part of the first mating portion can extend into the clamping space. The first mounting bracket further includes a third main body portion, which is located on a side of the second main body portion away from the first main body portion. One end of the third main body portion is connected to the second main body portion, and the other end is connected to the box body.

[0006] In a possible implementation manner, the first engaging portion is provided with at least one engaging groove. When the engaging portion is engaged with the first engaging portion, at least a part of the engaging portion is located in the engaging groove. The engaging portion and the first engaging portion are engaged to limit the relative position between the first mounting bracket and the box body. In a possible implementation manner, the engaging portion is fixedly connected or integrally formed with the box body. In a possible implementation manner, the first main body portion is provided with at least one second engaging portion, and the second engaging portion is connected to the high-voltage box through a mounting member. Along the length direction of the first main body portion, the first engaging portion and the second engaging portion are located at opposite ends of the first main body portion.

[0007] In a possible implementation manner, at least one of the support members is connected to a side of the second main body portion away from the circuit breaker, and / or; The first mounting bracket is provided with a flange, and there is an included angle between the flange and the first main body portion and / or the second main body portion. At least one of the support members is connected to the flange.

[0008] In a possible implementation manner, the high-voltage box further includes a first insulating member, which includes a first main body portion, a second main body portion, and a third main body portion. The first main body portion and the third main body portion are located on opposite sides of the second main body portion and have an included angle with the second main body portion. The first main body portion, the second main body portion, and the third main body portion are used to enclose an accommodation space, and the circuit breaker is located in the corresponding accommodation space.

[0009] In a possible implementation manner, the connecting member includes a first connecting section, a second connecting section, and at least one transition section. The first connecting section and the second connecting section are connected through the transition section, and there is an included angle between the transition section and the first connecting section and / or the second connecting section. The first connecting section is electrically connected to the circuit breaker, and the second connecting section is electrically connected to the electronic component. The connecting member can be installed on the high-voltage box or removed from the high-voltage box together with the circuit breaker.

[0010] In a possible implementation manner, the high-voltage box includes an arc extinguishing component and a second insulating component. The arc extinguishing component is located at the incoming line end of the circuit breaker, and the second insulating component is located at the outgoing line end of the circuit breaker. The connecting component includes a first connecting component and a second connecting component. The electronic components include a fuse and a relay. One end of the first connecting component is electrically connected to the positive electrode of the outgoing line end of the circuit breaker, and the other end is electrically connected to the fuse. One end of the second connecting component is electrically connected to the negative electrode of the outgoing line end of the circuit breaker, and the other end is electrically connected to the relay. At least a part of the second insulating component is located between the first connecting component and the second connecting component.

[0011] In a possible implementation manner, the high-voltage box includes a second mounting bracket. The second mounting bracket is located in the accommodating cavity. The second mounting bracket includes a mounting portion and a supporting portion. There is a gap between the supporting portion and the bottom wall of the accommodating cavity where the supporting portion is located between the mounting portion and the bottom wall of the accommodating cavity. The supporting portion is connected to the box body. Among the fuse and the relay, one is located on the side of the mounting portion away from the bottom wall of the accommodating cavity, and the other is located on the side of the mounting portion close to the bottom wall of the accommodating cavity.

[0012] In a possible implementation manner, the circuit breaker is provided with a mounting groove, and the arc extinguishing component is provided with a third mating portion. At least a part of the third mating portion can extend into the mounting groove; The high-voltage box further includes a stopper. The stopper is connected to the second main body portion. The stopper is located on the side of the arc extinguishing component away from the circuit breaker and is used to limit the movement of the arc extinguishing component relative to the circuit breaker.

[0013] An embodiment of the present application provides an energy storage system. The energy storage system includes an energy storage cabinet, a high-voltage box, and at least two energy storage inverters. The high-voltage box and the energy storage inverters are located in the energy storage cabinet, and the energy storage inverters are electrically connected to the high-voltage box. The high-voltage box includes a box body having an accommodating cavity, at least two circuit breakers electrically connected to electronic components through connecting components, and a first mounting bracket for mounting the circuit breakers. Among them, the first mounting bracket includes a first main body portion and a second main body portion that are connected to each other. The first main body portion is detachably mounted in the accommodating cavity. Along the height direction of the high-voltage box, each circuit breaker is sequentially mounted on the second main body portion. The circuit breaker can be mounted on the high-voltage box or disassembled from the high-voltage box together with the first mounting bracket. The electronic components are located on the side of the second main body portion away from the circuit breaker. The high-voltage box further includes at least one support member. One end of the support member is connected to the connecting component, and the other end is connected to the first mounting bracket. Through such a design, it is beneficial to reduce the volume of the high-voltage box, reduce the assembly difficulty, and improve the production efficiency.

[0014] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 Schematic diagram of the high-voltage box provided by the embodiment of the present application; Figure 2 Internal schematic diagram of the high-voltage box provided by the embodiment of the present application; Figure 3 Schematic diagram of the first mounting bracket provided by the embodiment of the present application; Figure 4 Schematic diagram of the box body provided by the present application; Figure 5 For Figure 4 Partial enlarged view of position I in Figure 6 Schematic diagram of the circuit breaker and the mounting bracket provided by the embodiment of the present application; Figure 7 Schematic diagram of the mounting module provided by the embodiment of the present application; Figure 8 Schematic diagram of the first mounting bracket provided by the embodiment of the present application; Figure 9 Cross-sectional view of the high-voltage box provided by the embodiment of the present application; Figure 10 Schematic diagram of the circuit breaker provided by the embodiment of the present application; Figure 11 Schematic diagram of the arc extinguishing component provided by the embodiment of the present application; Figure 12 Schematic diagram of the energy storage system provided by the embodiment of the present application.

[0017] Reference numerals 1 - Box body; 11 - Accommodating cavity; 12 - Clamping portion; 13 - Second mounting bracket; 131 - Mounting portion; 132 - Supporting portion; 14 - Control member; 15 - Connector; 2 - Electronic component; 21 - Fuse; 22 - Relay; 3 - Circuit breaker; 31 - Mounting groove; 32 - Connecting rod; 4 - Connecting piece; 41 - First connecting section; 42 - Second connecting section; 43 - Transition section; 44 - First connecting piece; 45 - Second connecting piece; 5 - First mounting bracket; 51 - First main body part; 511 - First mating part; 511a - Mating groove; 512 - Second mating part; 513 - Through hole; 52 - Second main body part; 521 - First mounting hole; 53 - Flange; 531 - Third mounting hole; 54 - Third main body part; 55 - Stop block; 6 - Support piece; 7 - First insulating part; 71 - First body part; 72 - Second body part; 73 - Third body part; 74 - Avoidance groove; 8 - Arc extinguishing part; 81 - Third mating part; 9 - Second insulating part; 10 - Energy storage cabinet; 20 - High - voltage box; 201 - Connection end; 30 - Energy storage converter. Specific implementation mode

[0018] In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0019] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0020] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "this" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0021] It should be understood that the term "and / or" used herein is merely a correlative relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0022] Photovoltaic energy storage can convert solar energy into electrical energy for storage. The energy storage container is one of the important devices for photovoltaic energy storage, and its function is to store the electrical energy collected by the photovoltaic panels. The energy storage container is usually provided with a power conversion system (PCS) 30, which is connected to the high-voltage box 20. The power conversion system 30 is a device for storing electrical energy and can convert direct current into alternating current to provide electrical energy for external devices. The high-voltage box 20 is used to control the connection or disconnection of the main electrical circuit of the system to ensure the safe operation of the battery energy storage system.

[0023] Generally, the high-voltage box 20 is placed alone inside the container as an independent cabinet. With the development of technology, it has become a trend to integrate the power conversion system 30 inside the container. Since the space inside the container is limited, integrating the power conversion system 30 inside the container will compress the assembly space of the high-voltage box 20. Therefore, new requirements are put forward for the structure of the high-voltage box 20.

[0024] An embodiment of the present application provides an energy storage system, which may include an energy storage cabinet 10, a high-voltage box 20, and a power conversion system 30. The high-voltage box 20 and the power conversion system 30 are installed in the energy storage cabinet 10.

[0025] As Figure 1 and Figure 2 shown, an embodiment of the present application provides a high-voltage box 20, which includes a box body 1, electronic components 2, a first mounting bracket 5, and at least two circuit breakers 3. The box body 1 is provided with a receiving cavity 11 for receiving the first mounting bracket 5, the circuit breakers 3, and the electronic components 2. The circuit breakers 3 are installed on the first mounting bracket 5 and are installed in the high-voltage box 20 together with the first mounting bracket 5, or are removed from the high-voltage box 20 together with the first mounting bracket 5. The circuit breakers 3 are electrically connected to the electronic components 2 through connectors 4 and are used to control the connection or disconnection of the overall circuit of the energy storage system. As Figure 3 shown, the first mounting bracket 5 includes a first main body portion 51 and a second main body portion 52. The first main body portion 51 and the second main body portion 52 are connected to each other and have an included angle, and the first main body portion 51 and the second main body portion 52 may be arranged in an "L" shape. The first main body portion 51 is connected to the box body 1, and the circuit breakers 3 are installed on the first mounting bracket 5 through the second main body portion 52.

[0026] When assembling the high-voltage box 20, the circuit breaker 3 can be first installed on the first mounting bracket 5 outside the high-voltage box 20, so that the circuit breaker 3 and the first mounting bracket 5 form an installation module, and then the circuit breaker 3 and the first mounting bracket 5 are integrally installed inside the high-voltage box 20.

[0027] When the volume of the high-voltage box 20 decreases, the internal space of the high-voltage box 20 will also relatively decrease. When directly installing the circuit breaker 3 inside the high-voltage box 20, due to limited space, the installation operation is difficult, resulting in a reduction in assembly efficiency. Compared with the scheme of directly installing the circuit breaker 3 on the box body 1 of the high-voltage box 20, installing the circuit breaker 3 outside the high-voltage box 20 is beneficial to increasing the operation space and facilitating the operation of the operator.

[0028] The high-voltage box 20 provided by the embodiment of the present application includes at least two circuit breakers 3. Each circuit breaker 3 is respectively used to control a power conversion system for energy storage 30. Each circuit breaker 3 is sequentially installed on the second main body portion 52 of the first mounting bracket 5 along the thickness direction of the high-voltage box 20.

[0029] In the solution provided by the embodiment of the present application, by sequentially arranging the circuit breakers 3 along the height direction of the high-voltage box 20, the space utilization rate of the high-voltage box 20 in the height direction can be improved, thereby the integration degree of the high-voltage box 20 can be enhanced, the overall structure of the high-voltage box 20 can be made more compact, and thus it is beneficial to reduce the overall volume of the high-voltage box 20. Since the volume of the high-voltage box 20 decreases, the internal space of the high-voltage box 20 is limited, and the operation space left for the operator when installing the circuit breaker 3 is small. When installing multiple circuit breakers 3, due to insufficient operation space, the installation difficulty is large or even impossible to install. By adopting the solution provided by the embodiment of the present application, each circuit breaker 3 can be installed on the first mounting bracket 5 outside the high-voltage box 20 in advance, so that the operator has enough space to install the circuit breaker 3 to reduce the operation difficulty. After the circuit breaker 3 and the first mounting bracket 5 are installed, the circuit breaker 3 and the first mounting bracket 5 are integrally installed inside the high-voltage box 20. By modularizing the circuit breaker 3 and the first mounting bracket 5, the space utilization rate of the high-voltage box 20 can be improved and the installation difficulty can be reduced.

[0030] As Figure 2 shown, in a possible implementation manner, one end of the connecting member 4 is connected to the circuit breaker 3, and the other end is connected to the electronic component 2. The high-voltage box 20 further includes at least one support member 6. One end of the support member 6 is connected to the connecting member 4, and the other end is connected to the first mounting bracket 5.

[0031] By providing the support member 6, the connecting member 4 can be supported, thereby reducing the possibility of deformation of the connecting member 4 during use.

[0032] As Figure 3 、Figure 4 and Figure 5 As shown in Figure 5 , in a possible implementation, the box body 1 is provided with a clamping portion 12, and the first mounting bracket 5 is provided with a first mating portion 511. The clamping portion 12 is used to cooperate with the first mating portion 511 to limit the relative position between the first mounting bracket 5 and the box body 1.

[0033] Connecting the first mounting bracket 5 and the box body 1 by means of clamping can help reduce the operation difficulty, thereby reducing the requirement for the operation space. Moreover, the clamping method is also convenient for disassembly. When the circuit breaker 3 needs to be removed from the high-voltage box 20, the clamping between the first mounting bracket 5 and the box body 1 can be released, and the operation is relatively convenient and fast.

[0034] As Figure 5 shown, in a possible implementation, the clamping portion 12 is arranged on the bottom wall of the accommodating cavity 11 and protrudes away from the bottom wall. There is an angle between the clamping portion 12 and the bottom wall, and the angle is an acute angle. The space between the clamping portion 12 and the bottom wall of the accommodating cavity 11 can be used to form a clamping space, and at least part of the first mating portion 511 can extend into the clamping space for clamping.

[0035] Through such a design, it is convenient to connect the first mounting bracket 5 and the box body 1. When the first limiting portion extends into the clamping space, the clamping portion 12 can limit the first mating portion 511, thereby restricting the position of the first mounting bracket 5, which is beneficial to improving the installation position accuracy of the first mounting bracket 5 and better meeting the actual use requirements.

[0036] As Figure 3 shown, in a possible implementation, the first mating portion 511 is provided with at least one mating groove 511a. When the clamping portion 12 cooperates with the first mating portion 511, at least part of the clamping portion 12 is located in the mating groove 511a.

[0037] By providing the mating groove 511a, clamping can be formed through the cooperation between the clamping portion 12 and the mating groove 511a, which can further improve the connection stability between the clamping portion 12 and the first mounting bracket 5. By making the first mating portion 511 extend into the clamping space, the first mounting bracket 5 can be limited in the height direction of the high-voltage box 20. By making the clamping portion 12 extend into the mating groove 511a, it can be used to prevent the clamping portion 12 and the first mounting bracket 5 from shaking, which is beneficial to improving the connection stability between the circuit breaker 3, the first mounting bracket 5 and the high-voltage box 20, and reducing the possibility that the circuit breaker 3 shakes and deviates from the preset position during transportation and use, resulting in a failure of the high-voltage box 20.

[0038] As Figure 5 shown, in a possible implementation, the clamping portion 12 is fixedly connected to the box body 1.

[0039] The snap - connection part 12 can be an independent component relative to the box body 1 and is fixedly installed on the box body 1 by means of welding, bonding, threaded connection, etc. Such a design can adjust the position and quantity of the snap - connection part 12 according to actual usage requirements during use, making the configuration of the high - voltage box 20 more flexible and conducive to improving the utilization rate of the space of the high - voltage box 20.

[0040] In a possible implementation manner, the snap - connection part 12 can be integrally formed with the box body 1.

[0041] By adopting the integral - forming method, the assembly steps of the high - voltage box 20 can be reduced. The integrally - formed snap - connection part 12 has better integrity and is suitable for mass production. Due to the realization of the standardized design of the high - voltage box 20, the versatility of the high - voltage box 20 is improved.

[0042] As Figure 3 shown, in a possible implementation manner, the first main body part 51 is provided with at least one second mating part 512. The second mating part 512 can be connected to the high - voltage box 20 through mounting parts such as screws and bolts. Along the length direction of the first main body part 51, the first mating part 511 and the second mating part 512 are located at opposite ends of the first main body part 51.

[0043] By providing the second mating part 512, the contact area between the first mounting bracket 5 and the box body 1 can be increased, thereby improving the connection stability. The first mating part 511 and the second mating part 512 are located on different sides of the first main body part 51. During installation, the first mounting bracket 5 and the box body 1 can be connected from different positions, thus improving the installation stability of the first mounting bracket 5 and reducing the possibility of the first mounting bracket 5 shaking during transportation and use.

[0044] As Figure 3 shown, in a possible implementation manner, the first main body part 51 is provided with a through - hole 513. The through - hole 513 penetrates the first main body part 51 along the thickness direction of the high - voltage box 20.

[0045] By providing the through - hole 513 in the first main body part 51, it can be used to avoid wiring harnesses. During the assembly process, the wiring harness can pass through the through - hole 513. At the same time, the through - hole 513 also has the function of weight reduction, which is beneficial to reducing the weight of the first mounting bracket 5 and further reducing the overall mass of the high - voltage box 20.

[0046] As Figure 3 shown, in a possible implementation manner, the second main body part 52 is provided with a first mounting hole 521. The circuit breaker 3 is installed on the first mounting bracket 5 through the first mounting hole 521.

[0047] By providing the first mounting hole 521, it is convenient for the circuit breaker 3 to be connected to the first mounting bracket 5.

[0048] As Figure 6 shown, in a possible implementation, at least one support member 6 is connected to a side of the second main body portion 52 away from the circuit breaker 3.

[0049] One end of the support member 6 is connected to the connecting member 4, and the other end is connected to the first mounting bracket 5. Through such a design, support can be provided for the connecting member 4.

[0050] Compared with the scheme of directly installing the circuit breaker 3 in the high-voltage box 20, since the first mounting bracket 5 is not provided, when the size of the connecting member 4 is large and the connecting member 4 needs to be supported, the connecting member 4 can only be arranged along the inner wall of the high-voltage box 20, and a support structure is arranged on the inner wall of the high-voltage box 20. Such a method usually results in the connecting member 4 being only a straight-line structure. Therefore, the relative positions of the circuit breaker 3 and the electronic component 2 electrically connected to the circuit breaker 3 are affected by the support structure, and the electronic component 2 can only be located on the side where the outgoing line end of the circuit breaker 3 is located, resulting in restrictions on the overall layout of the high-voltage box 20, which is not conducive to the optimal design of the internal structure of the high-voltage box 20 and increases the volume of the high-voltage box 20. Moreover, since the support member 6 is arranged on the inner wall of the box body 1, during installation, operations need to be carried out inside the box body 1, and the space inside the box body 1 is limited, resulting in an increase in the connection difficulty and affecting the assembly efficiency.

[0051] In the solution provided by the embodiments of the present application, by providing the first mounting bracket 5, the support member 6 can be provided on the first mounting bracket 5. Therefore, the position of the electronic component 2 can be adjusted according to the layout requirements of the high-voltage box 20, and the connecting member 4 can be set as a special-shaped connecting member 4, that is, the connecting member 4 can be not a straight-line structure, the connecting member 4 can include one or more bent segments, and the support member 6 is used to support the connecting member 4, so that the electronic component 2 can be arranged on a side of the second main body portion 52 away from the circuit breaker 3, that is, the electronic component 2 can not be limited to the side where the outgoing line end of the circuit breaker 3 is located.

[0052] At the same time, during the process of assembling the high-voltage box 20, the connecting member 4 can be electrically connected to the circuit breaker 3 in advance and connected to the support member 6. In such a way, only the connecting member 4 and the electronic component 2 need to be connected inside the high-voltage box 20, which can reduce the operation steps inside the high-voltage box 20, thereby facilitating the reduction of the assembly difficulty and improving the assembly efficiency.

[0053] As Figure 6 shown, in a possible implementation, the first mounting bracket 5 is provided with a flange 53, and an angle is formed between the flange 53 and the first main body portion 51 and / or the second main body portion 52, and at least one support member 6 is connected to the flange 53.

[0054] By providing the flanging 53, it can strengthen the first main body portion 51 and the second main body portion 52, thereby improving the structural strength of the first mounting bracket 5 and better meeting the actual usage requirements. Moreover, by providing the flanging 53, it can be used to increase the area of the first mounting bracket 5. The support member 6 can be connected to the flanging 53, thereby enhancing the flexibility of the setting of the support member 6, so as to enhance the flexibility of the setting of the connecting member 4. The support member 6 can be connected to one or more of the box body 1, the second main body portion 52, and the flanging 53 according to actual requirements, which is beneficial to optimizing the internal structure of the high-voltage box 20, and thus the volume of the high-voltage box 20 can be reduced.

[0055] In a possible implementation manner, the support member 6 can be mounted on the first mounting bracket 5 by means of welding, bonding, threaded connection, etc. On the side of the second main body portion 52 away from the circuit breaker 3, a second mounting hole may be provided and / or the flanging 53 is provided with a third mounting hole 531. Mounting the support member 6 through the mounting hole can improve the positioning accuracy of the support member 6 during installation and increase the contact area between the first mounting bracket 5 and the support member 6, thereby being beneficial to enhancing the connection stability of the support member 6 and better meeting the actual usage requirements.

[0056] As Figure 6 shown, in a possible implementation manner, the first mounting bracket 5 may further include a third main body portion 54. The third main body portion 54 is located on the side of the second main body portion 52 away from the first main body portion 51, that is, the first main body portion 51 and the third main body portion 54 are located on opposite sides of the second main body portion 52. The first main body portion 51, the second main body portion 52, and the third main body portion 54 can be used to enclose a vertically placed "U" - shaped structure, and the opening of the "U" - shaped structure faces the side wall of the box body 1. One end of the third main body portion 54 is connected to the second main body portion 52, and the other end is connected to the box body 1.

[0057] The third main body portion 54 can be connected to the second main body portion 52 and the box body 1 by means of threaded connection, etc., for increasing the contact area and connection points between the first mounting bracket 5 and the box body 1, thereby enhancing the connection stability between the first mounting bracket 5 and the box body 1. Along the thickness direction of the high - voltage box 20, the lower side of the first mounting bracket 5 is connected to the box body 1 through the first fitting portion 511 and the second fitting portion 512, and the upper part of the first mounting bracket 5 is connected to the box body 1 through the third main body portion 54, which can be beneficial to reducing the possibility of the first mounting bracket 5 shaking during transportation and use, thereby being beneficial to enhancing the installation stability of the circuit breaker 3 and better meeting the actual usage requirements.

[0058] As Figure 7 shown, in a possible implementation manner, the high - voltage box 20 further includes a first insulating member 7, as Figure 8As shown, the first insulating member 7 includes a first body portion 71, a second body portion 72, and a third body portion 73. The first body portion 71 and the third body portion 73 are located on opposite sides of the second body portion 72 and both form an angle with the second body portion 72. The second body portion 72 and the third body portion 73 are used to enclose an accommodation space, and the circuit breaker 3 is disposed in the corresponding accommodation space.

[0059] The first insulating member 7 can be in a "U" shape structure, covering and disposed outside the circuit breaker 3 for insulation, reducing the possibility of contact between adjacent circuit breakers 3, thereby improving the working stability and safety of the high-voltage box 20.

[0060] As Figure 8 shown, in a possible implementation manner, the first insulating member 7 may further include an avoidance groove 74, and the avoidance groove 74 is used to avoid the connection position between the circuit breaker 3 and the first mounting bracket 5.

[0061] The avoidance groove 74 can be provided in the second body portion 72. During assembly, along the thickness direction of the high-voltage box 20, the first body portion 71 and the third body portion 73 are located on opposite sides of the circuit breaker 3, and the second body portion 72 is located on the side of the circuit breaker 3 facing the second main body portion 52. By providing the avoidance groove 74, the interference of the first insulating member 7 on the connection position between the circuit breaker 3 and the first mounting bracket 5 can be reduced, thereby reducing the influence of the connecting member 4 on the mounting stability of the circuit breaker 3, which better meets the actual use requirements.

[0062] In a possible implementation manner, the first insulating member 7 can be insulating paper.

[0063] The insulating paper has good insulation performance and high strength, can withstand the pressure of the high-voltage electric field and mechanical stress, and can be used to ensure the normal operation of the high-voltage box 20. At the same time, the insulating paper also has good heat resistance and cold resistance. When the high-voltage box 20 is applied outdoors, it can adapt to different environments, which better meets the actual use requirements. As Figure 6 shown, in a possible implementation manner, the connecting member 4 includes a first connecting section 41, a second connecting section 42, and at least one transition section 43. The first connecting section 41 and the second connecting section 42 are connected by the transition section 43, and the transition section 43 forms an angle with the first connecting section 41 and / or the second connecting section 42. The first connecting section 41 is electrically connected to the circuit breaker 3, the second connecting section 42 is electrically connected to the electronic component 2, and the connecting member 4 can be installed in the high-voltage box 20 or removed from the high-voltage box 20 together with the circuit breaker 3.

[0064] The connecting member 4 can be a multi-segment structure. The relative positions of the first connecting segment 41 and the second connecting segment 42 are set according to the relative positions between the circuit breaker 3 and the electronic component 2, and they are connected through a transition segment 43, so that the relative positions between the circuit breaker 3 and the electronic component 2 are more flexible, thereby improving the utilization rate of the internal space of the high-voltage box 20 and being beneficial to reducing the volume of the high-voltage box 20.

[0065] In a possible implementation manner, the extending directions of the first connecting segment 41 and the second connecting segment 42 can be parallel, and one or more transition segments 43 can be included between the first connecting segment 41 and the second connecting segment 42. The connecting member 4 can be integrally formed or a segmented structure, and is connected by mounting parts such as screws and bolts or connected by means such as welding and bonding.

[0066] When the connecting member 4 is integrally formed, it has a good overall shape and has good strength and precision.

[0067] When the connecting member 4 is a segmented structure, the structure of the connecting member 4 is more flexible. Different structures of the transition segment 43 can be pre-processed, and during assembly, the suitable transition segment 43 is selected for assembly according to actual requirements.

[0068] As Figure 6 shown, in a possible implementation manner, at least part of the first connecting segment 41 is located on the side of the second main body portion 52 close to the circuit breaker 3, and at least part of the second connecting segment 42 is located on the side of the second main body portion 52 far from the circuit breaker 3. In the width direction of the second main body portion 52, the first connecting segment 41 and the second connecting segment 42 can extend out of the range of the second main body portion 52, that is, along the thickness direction of the second main body portion 52, a partial area between the first connecting segment 41 and the second connecting segment 42 can be provided without the second main body portion 52. Such a design can facilitate the setting of the transition segment 43, reduce the possibility of interference between the connecting member 4 and the first mounting bracket 5, and better meet the actual use requirements.

[0069] As Figure 7 shown, in a possible implementation manner, the high-voltage box 20 includes an arc extinguishing member 8 and a second insulating member 9. The arc extinguishing cover is located at the incoming line end of the circuit breaker 3, and the second insulating member 9 is located at the outgoing line end of the circuit breaker 3. The connecting member 4 includes a first connecting member 44 and a second connecting member 45. The electronic component 2 includes a fuse 21 and a relay 22. One end of the first connecting member 44 is electrically connected to the positive pole of the outgoing line end of the circuit breaker 3, and the other end is electrically connected to the fuse 21. One end of the second connecting member 45 is electrically connected to the negative pole of the outgoing line end of the circuit breaker 3, and the other end is electrically connected to the relay 22.

[0070] The arc extinguishing member 8 is used to make the arc contact with a solid to reduce the arc temperature, thereby accelerating the arc extinguishing, which can improve safety and extend the service life of the high-voltage box 20. The second insulating member 9 is located between the first connecting member 44 and the second connecting member 45 to insulate between the first connecting member 44 and the second connecting member 45, reducing the possibility of electrical connection and short circuit between the first connecting member 44 and the second connecting member 45, thereby enhancing the safety and stability of the high-voltage box 20.

[0071] As Figure 9 shown, in a possible implementation manner, the high-voltage box 20 includes a second mounting bracket 13. The second mounting bracket 13 is located in the mounting cavity. The second mounting bracket 13 includes a mounting portion 131 and a supporting portion 132. The supporting portion 132 is connected to the mounting portion 131. The mounting portion 131 is used to mount the electronic component 2, and the supporting portion 132 is connected to the box body 1. Along the thickness direction of the high-voltage box 20, there is a spacing between the mounting portion 131 and the bottom wall of the accommodating cavity 11. One of the fuse 21 and the relay 22 is located on the side of the mounting portion 131 away from the bottom wall of the accommodating cavity 11, and the other is located on the side of the mounting portion 131 close to the bottom wall of the accommodating cavity 11.

[0072] Through such a design, the fuse 21 and the relay 22 can be arranged along the height direction of the high-voltage box 20 respectively, thereby improving the utilization rate of the internal space of the high-voltage box 20, reducing the space occupied by the electronic component 2 in the plane of the length and width directions of the high-voltage box 20, facilitating the optimization of the internal layout of the high-voltage box 20, and thus reducing the volume of the high-voltage box 20 to better meet the actual use requirements.

[0073] As Figure 10 shown, in a possible implementation manner, the circuit breaker 3 is provided with a mounting groove 31. As Figure 11 shown, the arc extinguishing member 8 is provided with a third engaging portion 81, and at least a part of the third engaging portion 81 can extend into the mounting groove 31.

[0074] During installation, the arc extinguishing member 8 can be slidably engaged with the mounting groove 31 through the third engaging portion 81 to drive the arc extinguishing member 8 to move along the mounting groove 31 to a predetermined position. Such a design can enhance the connection stability between the arc extinguishing cover and the third engaging portion 81, and at the same time has a lower operation difficulty, better meeting the actual use requirements.

[0075] As Figure 6As shown, in a possible implementation, the high-voltage box 20 further includes a stop block 55 connected to the second main body 52. The stop block 55 is located on the side of the arc extinguishing member 8 away from the sectional force, and is used to limit the movement of the arc extinguishing member 8 relative to the circuit breaker 3. Along the installation direction of the arc extinguishing member 8, the stop block 55 can be located on the side of the arc extinguishing member 8 away from the circuit breaker 3, and the stop block 55 can be in contact with the arc extinguishing member 8 to limit the movement of the arc extinguishing member 8 in the direction opposite to the installation direction, thereby preventing the arc extinguishing member 8 from detaching from the circuit breaker 3.

[0076] By providing the stop block 55, the arc extinguishing member 8 can be limited, thereby improving the installation stability of the arc extinguishing member 8, reducing the possibility of the arc extinguishing member 8 detaching from the circuit breaker 3, facilitating the improvement of the safety and stability of the high-voltage box 20, and better meeting the actual use requirements.

[0077] In a possible implementation, the stop block 55 can be connected to the side of the second main body 52 away from the circuit breaker 3. The stop block 55 can be provided with an avoidance recess for structures such as the connecting member 4, reducing the possibility of interference between the stop block 55 and other structures inside the high-voltage box 20.

[0078] As Figure 2 and Figure 7 As shown, in a possible implementation, the circuit breaker 3 includes a connecting rod 32. The high-voltage box 20 is provided with a connecting hole and a control member 14. The control member 14 is located outside the box body 1, and at least part of the connecting rod 32 can pass through the connecting hole and be connected to the control member 14.

[0079] Through such a design, the circuit breaker 3 can be controlled by the control member 14, better meeting the actual use requirements.

[0080] As Figure 2 As shown, in a possible implementation, the high-voltage box 20 further includes a connector 15. The connector 15 is located outside the box body 1, and the incoming line end of the circuit breaker 3 is connected to the connector 15.

[0081] The connector 15 can be used for electrical connection with the battery compartment.

[0082] When assembling the high-voltage box 20 provided in the embodiment of the present application, a first insulating member 7 can be provided on the first mounting bracket 5 first, and the circuit breaker 3 can be fixedly connected to the first mounting bracket 5. The first insulating member 7 can be arranged along the circumference of the circuit breaker 3 to protect the circuit breaker 3. The connecting members 4 such as copper bars are correspondingly installed at the incoming line end and the outgoing line end of the circuit breaker 3. After installing at least two circuit breakers 3 on the first mounting bracket 5 according to requirements, the first mounting bracket 5, the circuit breaker 3, and the connecting members 4 are installed in the box body 1 together.

[0083] Through such a design, the circuit breaker 3, the connecting member 4, and the first mounting bracket 5 can be modularized. By performing modular installation outside the high-voltage box 20, the space requirement for the box body 1 can be reduced, and the requirement for the operating space is relatively small. Therefore, the volume of the high-voltage box 20 can be reduced. At the same time, performing the installation operation outside the box can provide a relatively large operating space, thereby reducing the operation difficulty and making the assembly more convenient and fast, thus improving the assembly efficiency of the high-voltage box 20 and better meeting the actual usage requirements.

[0084] Based on the high-voltage box 20 provided in each of the above embodiments, the embodiment of the present application further provides an energy storage system. The energy storage system includes an energy storage cabinet 10, a high-voltage box 20, and at least two energy storage converters 30. The high-voltage box 20 and the energy storage converter 30 are located in the energy storage cabinet 10, and the energy storage cabinet 10 can be a structure such as a container. The energy storage converter 30 is electrically connected to the incoming line end of the circuit breaker 3 of the high-voltage box 20. The high-voltage box 20 can be the high-voltage box 20 involved in any of the above embodiments. Since the high-voltage box 20 has the above technical effects, the energy storage system including the high-voltage box 20 also has corresponding technical effects, which will not be elaborated here.

[0085] As Figure 12 shown, the embodiment of the present application provides an energy storage cabinet 10. The high-voltage box 20 and the energy storage converter 30 are installed in the cavity of the energy storage cabinet 10, and the energy storage converter 30 is located on one side of the high-voltage box 20. In a possible implementation manner, the high-voltage box 20 is located on the side of the energy storage converter 30 close to the cabinet door of the energy storage cabinet 10, that is, the installation position of the high-voltage box 20 is more outward compared with the energy storage converter 30. At least two energy storage converters 30 are located on the side of the high-voltage box 20 away from the cabinet door and are arranged in sequence. The electronic component 2 is arranged on the side of the high-voltage box 20 close to the energy storage converter 30. Through such a design, it is convenient for the electronic component 2 to be electrically connected to the energy storage converter 30, and the wiring distance of electrical connection structures such as copper bars in the high-voltage box 20 can be reduced, thereby optimizing the internal structure of the high-voltage box 20 and being beneficial to reducing the volume of the high-voltage box 20. Since the width of the energy storage cabinet 10 is limited, the energy storage converter 30 needs to be arranged along the depth direction of the cavity on one side of the high-voltage box 20, that is, the energy storage converter 30 is located on the side of the high-voltage box 20 away from the cabinet door, thereby saving the space of the energy storage cabinet 10 in the width direction and being beneficial to reducing the size of the energy storage cabinet 10.

[0086] As Figure 12As shown in the figure, along the width direction of the energy storage cabinet 10, the circuit breaker 3 and the electronic component 2 are located on the same side of the high-voltage box 20, and the other side can be used to install components such as AC output copper bars, pre-charge resistors, and cooling fans. The DC input is electrically connected to the incoming line end of the circuit breaker 3 through the connector 15. The positive pole of the outgoing line end of the circuit breaker 3 is electrically connected to the fuse 21, the output end of the fuse 21 is electrically connected to the relay 22, the negative pole of the outgoing line end of the circuit breaker 3 is electrically connected to the relay 22, and the output end of the relay 22 is electrically connected to the energy storage converter 30. The positive pole of the output end of the circuit breaker 3 and the negative pole of the output end are electrically connected to the same relay after passing through the fuse 21. Taking the high-voltage box 20 including two circuit breakers 3 as an example, the high-voltage box 20 also includes two fuses 21 and two relays 22 at the same time. The positive pole of the output end of the first circuit breaker is electrically connected to the first fuse, the output end of the first fuse is electrically connected to the first relay, and the negative pole of the output end of the first circuit breaker is electrically connected to the first relay. The positive pole of the output end of the second circuit breaker is electrically connected to the second fuse, the output end of the second fuse is electrically connected to the second relay, and the negative pole of the output end of the second circuit breaker is electrically connected to the second relay. The output ends of the relays respectively lead out positive output and negative output, that is, one side of the high-voltage box 20 close to the energy storage converter 30 has four connection terminals 201 for electrically connecting with the energy storage converter 30 An embodiment of the present application provides an energy storage system. The energy storage system includes an energy storage cabinet 10, a high-voltage box 20, and at least two energy storage converters 30. The high-voltage box 20 and the energy storage converter 30 are located in the energy storage cabinet 10, and the energy storage converter 30 is electrically connected to the high-voltage box 20; the high-voltage box 20 includes a box body 1 having a receiving cavity 11, at least two circuit breakers 5 electrically connected to the electronic component 2 through a connecting member 4, and a first mounting bracket 5 for mounting the circuit breaker 3. Among them, the first mounting bracket 5 includes a first main body portion 51 and a second main body portion 52 connected to each other. The first main body portion 51 is detachably mounted in the receiving cavity 11. Along the height direction of the high-voltage box 20, each circuit breaker 3 is sequentially mounted on the second main body portion 52. The circuit breaker 3 can be mounted on the high-voltage box 20 or detached from the high-voltage box 20 together with the first mounting bracket 5. The electronic component 2 is located on the side of the second main body portion 52 away from the circuit breaker 3. The high-voltage box 20 further includes at least one support member 6. One end of the support member 6 is connected to the connecting member 4, and the other end is connected to the first mounting bracket 5. Through such a design, it is beneficial to reduce the volume of the high-voltage box 20, reduce the assembly difficulty, and improve the production efficiency.

[0087] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises an energy storage cabinet (10), a high-voltage box (20) and at least two energy storage converters (30); the high-voltage box (20) and the energy storage converter (30) are located in the energy storage cabinet (10); the energy storage converter (30) is electrically connected to the high-voltage box (20); the high-voltage box (20) comprises: A box body (1), wherein the box body (1) is provided with a containing cavity (11); An electronic component (2), the electronic component (2) being located in the accommodating cavity (11); At least two circuit breakers (3), the circuit breakers (3) being electrically connected to the electronic components (2) via a connecting piece (4); A first mounting bracket (5), the first mounting bracket (5) being used to mount the circuit breaker (3) on the box (1); The first mounting bracket (5) comprises a first main body (51) and a second main body (52) connected to each other, the first main body (51) being detachably mounted on the accommodating cavity (11), and each of the circuit breakers (3) being sequentially mounted on the second main body (52) along the height direction of the high-voltage box (20), the circuit breakers (3) being able to be mounted on or removed from the high-voltage box (20) along with the first mounting bracket (5), the electronic component (2) being located on a side of the second main body (52) away from the circuit breaker (3), and the high-voltage box (20) further comprising at least one support member (6), one end of the support member (6) being connected to the connecting member (4), and the other end being connected to the first mounting bracket (5); The box body (1) is provided with a clamping portion (12), and the first mounting bracket (5) is provided with a first matching portion (511). The clamping portion (12) is arranged on the bottom wall of the accommodating cavity (11) and protrudes in a direction away from the bottom wall, and the angle between the clamping portion (12) and the bottom wall is an acute angle; The space between the clamping portion (12) and the bottom wall is a clamping space, and at least a portion of the first matching portion (511) can extend into the clamping space; The first mounting bracket (5) further comprises a third main body portion (54), the third main body portion (54) being located on a side of the second main body portion (52) away from the first main body portion (51), one end of the third main body portion (54) being connected to the second main body portion (52), and the other end of the third main body portion (54) being connected to the box body (1).

2. The energy storage system according to claim 1, characterized in that: The first matching portion (511) is provided with at least one matching groove (511a); when the clamping portion (12) matches with the first matching portion (511), at least a portion of the clamping portion (12) is located in the matching groove (511a); the clamping portion (12) and the first matching portion (511) match to limit the relative position of the first mounting bracket (5) and the box body (1).

3. The energy storage system according to claim 1, characterized in that: The clamping portion (12) is fixedly connected to or integrally formed with the box body (1).

4. The energy storage system according to claim 1, characterized in that: The first main body (51) is provided with at least one second matching portion (512), the second matching portion (512) being connected to the high-voltage box (20) via a mounting member, and along the length direction of the first main body (51), the first matching portion (511) and the second matching portion (512) are located at opposite ends of the first main body (51).

5. The energy storage system according to claim 1, characterized in that: At least one of the support members (6) is connected to a side of the second main body (52) away from the circuit breaker (3), and / or; The first mounting bracket (5) is provided with a flange (53), an angle is formed between the flange (53) and the first main body (51) and / or the second main body (52), and at least one of the support members (6) is connected to the flange (53).

6. The energy storage system according to any one of claims 1 to 5, characterized in that: The high-voltage box (20) further comprises a first insulating member (7), the first insulating member (7) comprising a first body portion (71), a second body portion (72) and a third body portion (73), the first body portion (71) and the third body portion (73) being located on opposite sides of the second body portion (72) and having an angle between the second body portions (72), the first body portion (71), the second body portion (72) and the third body portion (73) being used to enclose a receiving space, and the circuit breaker (3) being located in the corresponding receiving space.

7. The energy storage system according to any one of claims 1 to 5, characterized in that: The connecting member (4) comprises a first connecting section (41), a second connecting section (42) and at least one transition section (43); the first connecting section (41) and the second connecting section (42) are connected via the transition section (43); an angle is formed between the transition section (43) and the first connecting section (41) and / or the second connecting section (42); the first connecting section (41) is electrically connected to the circuit breaker (3); the second connecting section (42) is electrically connected to the electronic component (2); and the connecting member (4) can be installed on the high-voltage box (20) or removed from the high-voltage box (20) along with the circuit breaker (3).

8. The energy storage system according to any one of claims 1 to 5, characterized in that: The high-voltage box (20) comprises an arc extinguishing member (8) and a second insulating member (9), wherein the arc extinguishing member (8) is located at the incoming line end of the circuit breaker (3), and the second insulating member (9) is located at the outgoing line end of the circuit breaker (3); the connecting member (4) comprises a first connecting member (44) and a second connecting member (45); the electronic component (2) comprises a fuse (21) and a relay (22); one end of the first connecting member (44) is electrically connected to the positive pole of the outgoing line end of the circuit breaker (3), and the other end is electrically connected to the fuse (21); one end of the second connecting member (45) is electrically connected to the negative pole of the outgoing line end of the circuit breaker (3), and the other end is electrically connected to the relay (22); at least a portion of the second insulating member (9) is located between the first connecting member (44) and the second connecting member (45).

9. The energy storage system according to claim 8, characterized in that: The high-voltage box (20) comprises a second mounting bracket (13), the second mounting bracket (13) being located in the accommodating cavity (11), the second mounting bracket (13) comprising a mounting portion (131) and a supporting portion (132), the supporting portion (132) being located between the mounting portion (131) and a bottom wall of the accommodating cavity (11) with a spacing therebetween, the supporting portion (132) being connected to the box body (1), and one of the fuse (21) and the relay (22) being located on a side of the mounting portion (131) away from the bottom wall of the accommodating cavity (11), and the other being located on a side of the mounting portion (131) close to the bottom wall of the accommodating cavity (11).

10. The energy storage system according to claim 8, characterized in that: The circuit breaker (3) is provided with a mounting groove (31), and the arc extinguishing member (8) is provided with a third matching portion (81), and at least a portion of the third matching portion (81) is capable of extending into the mounting groove (31); The high-voltage box (20) further comprises a stopper (55), the stopper (55) being connected to the second main body (52), the stopper (55) being located on a side of the arc extinguishing member (8) away from the circuit breaker (3), and being used to limit the movement of the arc extinguishing member (8) relative to the circuit breaker (3).

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