Ac-dc conversion circuit module and energy storage system

Abstract

The utility model relates to the technical field of energy storage, disclose a kind of AC-DC conversion loop module and energy storage system.The AC-DC conversion loop module of the utility model, comprising: mounting frame, PCS, fuse, AC-DC switch module and front panel, PCS is set on the guide rail of mounting frame, fuse, front panel and AC-DC switch module are set on mounting frame, AC-DC switch module includes: mounting plate, DC disconnecting switch, AC circuit breaker and three-phase AC wiring interface, positive and negative DC wiring interface of front panel, fuse, DC disconnecting switch, PCS, AC circuit breaker and three-phase AC wiring interface are connected to form AC-DC conversion loop.The AC-DC conversion loop module of the utility model can be pushed into the energy storage system cabinet as a whole, solves the problem of narrow assembly space in cabinet body and poor assembly performance;Positive and negative DC wiring interface and three-phase AC wiring interface are electrically connected to the outside through quick plug terminal, facilitating later maintenance.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically to an AC / DC conversion circuit module and an energy storage system. Background Technology

[0002] With the rapid development of renewable energy (such as photovoltaic and wind power) and the continuous deepening of smart grid construction, electrochemical energy storage systems are increasingly widely used in power systems due to their advantages such as fast adjustment speed and flexible configuration. The core function of an energy storage system is to realize the storage and release of electrical energy. This process relies on the AC-DC conversion circuit formed by the electrical interconnection of electronic devices such as energy storage converters (PCS), DC circuit breakers (DC disconnect switches), and AC circuit breakers. The AC-DC conversion circuit completes the bidirectional conversion between the DC power of the battery (PACK) energy storage unit and the AC power of the grid. The performance and integration of the PCS directly affect the efficiency, reliability, and cost of the entire energy storage system.

[0003] In existing small and medium-sized energy storage systems, especially in industrial, commercial, and residential energy storage scenarios, the PCS (Precast Conversion System), DC circuit breakers, and AC circuit breakers of the AC / DC conversion circuit are typically arranged as independent electrical units within a cabinet or enclosure. During system integration, installers first need to fix the PCS in the designated location, then install the DC and AC circuit breakers nearby, and finally electrically connect these components according to the circuit diagram using numerous cables and copper busbars.

[0004] The inventors of this application have discovered that the current discrete layout and connection method has the following drawbacks: the installation process is highly dependent on the operating space inside the box or cabinet, the integration efficiency is low, and the later maintenance is inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide an AC / DC conversion circuit module and an energy storage system to solve the problems mentioned in the background art.

[0006] This utility model embodiment provides an AC / DC conversion circuit module, including: a mounting frame, a PCS, a fuse, an AC / DC switch module, and a front panel;

[0007] The mounting frame is rectangular in shape.

[0008] One end of the mounting frame is provided with an L-shaped guide rail, and the PCS is slidably mounted on the guide rail and connected to the mounting frame;

[0009] The fuse, the front panel, and the AC / DC switch module are located at the other end of the mounting frame;

[0010] The AC / DC switch module includes: a mounting plate, a DC disconnect switch, an AC circuit breaker, and a three-phase AC wiring interface;

[0011] The mounting plate is disposed on the mounting frame and is spaced apart from the PCS. The DC disconnect switch, the AC circuit breaker and the three-phase AC wiring interface are disposed on the mounting plate.

[0012] The front panel is provided with positive and negative DC wiring interfaces. The positive and negative DC wiring interfaces, the fuse, the DC disconnect switch, the PCS, the AC circuit breaker, and the three-phase AC wiring interface are connected by aluminum busbars to form an AC-DC conversion circuit.

[0013] Based on the above scheme, the AC / DC conversion circuit module of this utility model, by setting up a mounting frame, PCS, fuses, AC / DC switch modules, and a front panel, allows the PCS to be pushed and pulled onto the guide rails of the mounting frame. The AC / DC switch module includes a mounting plate, a DC disconnect switch, an AC circuit breaker, and a three-phase AC wiring interface. The mounting plate is set on the mounting frame, and the DC disconnect switch, AC circuit breaker, and three-phase AC wiring interface are set on the mounting plate. The fuses and the front panel are set on the mounting frame. The positive and negative DC wiring interfaces, fuses, DC disconnect switches, PCS, AC circuit breakers, and three-phase AC wiring interfaces of the front panel are connected by aluminum busbars to form an AC / DC conversion circuit. In this utility model's AC / DC conversion circuit module, the PCS, fuses, and the DC disconnect switch, AC circuit breaker, and three-phase AC wiring interface of the AC / DC switch module are all integrated on the mounting frame to form a module, and the electrical connections between the components are completed according to the circuit schematic. This module can be prefabricated in batches outside the cabinet. When in use, the entire module is pushed into the energy storage system's enclosure or cabinet. The positive and negative DC wiring interfaces and the three-phase AC wiring interfaces are all connected to the external power supply through quick-connect terminals, which solves the problem of narrow assembly space and poor assemblability inside the enclosure or cabinet. After removing the quick-connect terminals, the entire module can be pulled out of the enclosure or cabinet by removing the fixing screws, which facilitates the later maintenance of the module.

[0014] In one feasible embodiment, the mounting plate is L-shaped and includes: a horizontal plate and a first side plate;

[0015] The DC disconnect switch and the AC circuit breaker are mounted on the horizontal plate, and the three-phase AC wiring interface is mounted on the first side plate, located on the side wall of the mounting frame.

[0016] The horizontal plate, the first side plate, the front panel, and the second side plate of the mounting frame form a rectangular frame, and the fuse is disposed on the second side plate of the mounting frame.

[0017] In one feasible solution, the length of the horizontal plate is less than the width of the mounting frame, and a notch is formed in the side wall of the mounting frame, with the three-phase AC wiring interface located in the notch;

[0018] The front panel is provided with a working port, and a cover plate is hinged to the working port. The working port is positioned opposite to the notch. The cover plate is used to plug and unplug the three-phase AC terminals when it is open.

[0019] In one feasible solution, a support rod is provided at the top of the mounting frame;

[0020] The horizontal plate is provided with a hanging part for hanging and fixing to the support rod.

[0021] In one feasible solution, both the first side plate and the second side plate are provided with ventilation mesh.

[0022] In one feasible solution, the front panel is provided with plexiglass to form an observation window.

[0023] In one feasible solution, the PCS has first flange edges on both sides for connection with the mounting frame.

[0024] In one feasible solution, rollers are provided on both sides of the mounting frame.

[0025] In one feasible embodiment, the front panel is provided with second flange edges on both sides.

[0026] This utility model embodiment also provides an energy storage system, including: an energy storage cabinet, a battery pack, and an AC / DC conversion circuit module as described in any of the above designs;

[0027] Multiple battery packs are stacked in the energy storage battery area of ​​the energy storage cabinet, and the AC / DC conversion circuit module is slidably installed in the PCS integration area of ​​the energy storage cabinet. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the AC / DC conversion circuit module in Embodiment 1 of this utility model;

[0030] Figure 2 As in Embodiment 1 of this utility model Figure 1A magnified view of a portion of the image;

[0031] Figure 3 This is a partial schematic diagram from another angle of the AC / DC conversion circuit module in Embodiment 1 of this utility model;

[0032] Figure 4 This is a schematic diagram of the mounting frame in Embodiment 1 of this utility model;

[0033] Figure 5 As in Embodiment 1 of this utility model Figure 4 A magnified view of a portion of the image;

[0034] Figure 6 This is a schematic diagram of the AC / DC switch module in Embodiment 1 of this utility model;

[0035] Figure 7 This is a top view schematic diagram of the AC / DC conversion circuit module in Embodiment 1 of this utility model;

[0036] Figure 8 This is an assembly diagram of the AC / DC conversion circuit module in Embodiment 1 of this utility model;

[0037] Figure 9 This is a schematic diagram of the energy storage system in Embodiment 2 of this utility model.

[0038] Numbering on the map:

[0039] 1. Mounting frame; 11. Guide rail; 12. Second side plate; 13. Notch; 14. Support rod; 15. Roller; 2. PCS; 21. First flange edge; 3. Fuse; 4. AC / DC switch module; 41. Mounting plate; 411. Horizontal plate; 4111. Hanging part; 412. First side plate; 42. DC disconnect switch; 43. AC circuit breaker; 44. Three-phase AC wiring interface; 5. Front panel; 51. Positive and negative DC wiring interface; 52. Cover plate; 53. Acrylic glass; 54. Second flange edge; 6. Aluminum busbar; 7. Energy storage cabinet; 8. Battery pack; 9. Busbar. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0044] As described in the background section of this application, in existing small and medium-sized energy storage systems, especially in industrial, commercial, and residential energy storage scenarios, the PCS (Precast Conversion System), DC circuit breakers, and AC circuit breakers of the AC / DC conversion circuit are typically arranged as independent electrical units within a cabinet or enclosure. During system integration, installers first need to fix the PCS in the designated location, then install the DC and AC circuit breakers nearby, and finally electrically connect these devices according to the circuit diagram using numerous cables and copper busbars.

[0045] The inventors of this application have discovered that the current discrete layout and connection method has the following drawbacks: the installation process is highly dependent on the operating space inside the box or cabinet, the integration efficiency is low, and the later maintenance is inconvenient.

[0046] To address the aforementioned problems, the inventors of this application have proposed a technical solution, the specific embodiments of which are as follows:

[0047] Example 1

[0048] Figure 1 This is a schematic diagram of the AC / DC conversion circuit module in Embodiment 1 of this utility model. Figure 2 As in Embodiment 1 of this utility model Figure 1 A magnified view of a portion of the image. Figure 3 This is a partial schematic diagram from another angle of the AC / DC conversion circuit module in Embodiment 1 of this utility model. Figure 4 This is a schematic diagram of the mounting frame in Embodiment 1 of this utility model. Figure 5 As in Embodiment 1 of this utility model Figure 4 A magnified view of a portion of the image. Figure 6 This is a schematic diagram of the AC / DC switch module in Embodiment 1 of this utility model. Figure 7 This is a top view schematic diagram of the AC / DC conversion circuit module in Embodiment 1 of this utility model. Figure 8 This is an assembly diagram of the AC / DC conversion circuit module in Embodiment 1 of this utility model.

[0049] like Figures 1 to 8 As shown, the AC / DC conversion circuit module of this embodiment includes: mounting frame 1, PCS2, fuse 3, AC / DC switch module 4 and front panel 5.

[0050] The mounting frame 1 is rectangular, and the top of the mounting space 1 is open.

[0051] The bottom of both sides of the mounting frame 1 is provided with L-shaped guide rails 11. The PCS (energy storage converter) 2 is pushed and pulled on the guide rails 11 of the mounting frame 1, and the PCS2 is fixed to the mounting frame 1 by screws after being pushed into the mounting frame 1.

[0052] The AC / DC switch module 4 includes: a mounting plate 41, a DC disconnect switch 42, an AC circuit breaker 43, and a three-phase AC wiring interface 44.

[0053] Mounting plate 41 is located at the other end (right end) of mounting frame 1, and is situated at the left and right ends of mounting frame 1, respectively, with mounting plate 41 and PCS2 spaced apart to facilitate electrical connection between PCS2 and AC / DC switches. DC disconnect switch 42, AC circuit breaker 43, and three-phase AC wiring interface 44 are respectively mounted on mounting plate 41.

[0054] The fuse 3 is mounted on the side wall of the mounting frame 1, adjacent to the DC disconnect switch 42 of the AC / DC switch module 4. The front panel 5 is mounted on the front (right) side wall of the mounting frame 1, adjacent to the AC / DC switch module 4, and is provided with positive and negative DC wiring interfaces 51.

[0055] The positive and negative DC wiring interface 51, fuse 3, DC disconnect switch 42, PCS2, AC circuit breaker 43 and three-phase AC wiring interface 44 are electrically connected by aluminum busbar 6 according to the circuit schematic diagram to form the AC-DC conversion circuit of the energy storage system.

[0056] like Figure 8 As shown, in this embodiment, the mounting frame is the integrated carrier of all electronic components. During module assembly, the PCS is pushed into the mounting frame from the rear end along the L-shaped guide rail and fixed to the mounting frame with screws; then the fuse is fixed to the side wall of the mounting frame; the DC disconnect switch, AC circuit breaker, and three-phase AC wiring interface are pre-assembled on the mounting plate to form an AC / DC switch module, and then the AC / DC switch module (mounting plate) is inserted into the mounting frame from top to bottom, and the mounting plate is fixed to the mounting frame with screws; then aluminum busbars are used to electrically connect each electronic component according to the circuit schematic; finally, the front panel and the circuit breaker opening / closing lever are installed on the mounting frame, and the positive and negative DC wiring interfaces are electrically connected to the components, completing the assembly of the AC / DC conversion circuit module.

[0057] When in use, push the mounting frame of the AC / DC conversion circuit module into the cabinet of the energy storage system along the guide rail and fix it with screws to complete the installation and fixation of the AC / DC conversion circuit module on the cabinet.

[0058] As can be seen from the above, the AC / DC conversion circuit module of this embodiment, through the setting of a mounting frame, PCS, fuses, AC / DC switch modules, and a front panel, allows the PCS to be pushed and pulled onto the guide rails of the mounting frame. The AC / DC switch module includes a mounting plate, a DC disconnect switch, an AC circuit breaker, and a three-phase AC wiring interface. The mounting plate is set on the mounting frame, and the DC disconnect switch, AC circuit breaker, and three-phase AC wiring interface are set on the mounting plate. The fuses and the front panel are set on the mounting frame. The positive and negative DC wiring interfaces, fuses, DC disconnect switches, PCS, AC circuit breakers, and three-phase AC wiring interfaces of the front panel are connected by aluminum busbars to form an AC / DC conversion circuit. In this embodiment, the AC / DC conversion circuit module, including the PCS, fuses, and the DC disconnect switch, AC circuit breaker, and three-phase AC wiring interface of the AC / DC switch module, are all integrated on the mounting frame to form a module, and the electrical connections between the components are completed according to the circuit schematic. This module can be prefabricated in batches outside the cabinet. When in use, the entire module is pushed into the energy storage system's enclosure or cabinet. The positive and negative DC wiring interfaces and the three-phase AC wiring interfaces are all connected to the external power supply through quick-connect terminals, which solves the problem of narrow assembly space and poor assemblability inside the enclosure or cabinet. After removing the quick-connect terminals, the entire module can be pulled out of the enclosure or cabinet by removing the fixing screws, which facilitates the later maintenance of the module.

[0059] Optional, such as Figure 2 , Figure 3 and Figure 6 As shown, in this embodiment, the AC / DC conversion circuit module and the AC / DC switch module 4 have a mounting plate 41 that is L-shaped at a right angle, including a horizontal plate 411 and a first side plate 412.

[0060] The three-phase AC wiring interface 44 is located on the first side plate 412 of the mounting plate 41, on one side wall of the mounting frame 1. The DC disconnect switch 42 and the AC circuit breaker 43 are respectively located on the left and right sides of the horizontal plate 411. The AC circuit breaker 43 is arranged adjacent to the three-phase AC wiring interface 44 for easy wiring.

[0061] The mounting frame 1 has a second side plate 12 on the opposite side of the first side plate 412, and the fuse 3 is mounted on the second side plate 12 of the mounting frame 1. The horizontal plate 411, the first side plate 412, the front panel 5, and the second side plate 12 of the mounting frame 1 form a rectangular frame to prevent foreign objects from entering and damaging the AC / DC switching devices inside the rectangular frame.

[0062] Furthermore, in this embodiment, the length of the horizontal plate 411 of the mounting plate 41 of the AC / DC conversion circuit module is less than the width of the mounting frame 1, and an inward notch 13 is formed at the side wall of the mounting frame 1.

[0063] The three-phase AC wiring interface 44 is located on the first side plate 412 of the mounting plate 1, at the notch 13 of the mounting frame 1.

[0064] The front panel 5 has a working opening, and a rotatable cover plate 52 is hinged to the working opening of the front panel 5. The position of the working opening of the front panel 5 corresponds to the position of the notch 13 of the mounting frame 1. When the cover plate 52 is opened, the three-phase AC terminal block connected to the three-phase AC wiring interface 44 can be quickly plugged in and unplugged, which facilitates the electrical connection between the three-phase AC wiring interface 44 and the external busbar.

[0065] Furthermore, in this embodiment, the AC / DC conversion circuit module has a support rod 14 at the top of the mounting frame 1.

[0066] The top of the horizontal plate 411 of the mounting plate 41 is provided with a hanging part 4111.

[0067] When installing the AC / DC switch module 4, the hanging part 4111 of the horizontal plate 411 is hung on the support rod 14, and then the horizontal plate 411 is fixed to the support rod 14 with screws, so that the mounting plate 41 is installed firmly and stably.

[0068] Furthermore, in this embodiment, the first side plate 412 of the mounting plate 41 and the second side plate 12 of the mounting frame 1 are both perforated plates, and the first side plate 412 and the second side plate 12 are provided with dense ventilation mesh.

[0069] During use, the external heat exchange equipment provides heat exchange ducts to remove some of the heat generated by the aluminum busbar, fuses, and PCS, ensuring the reliability of the electrical connection.

[0070] Optionally, in this embodiment, the AC / DC conversion circuit module has an acrylic glass 53 on the front panel 5, which forms an observation window on the front panel 5. The working status of electronic devices such as the DC disconnect switch 42, AC circuit breaker 43, and fuse 3 can be observed through the acrylic glass 53.

[0071] Optionally, in this embodiment, the AC / DC conversion circuit module PCS2 has first flange edges 21 on both the left and right sides.

[0072] After the PCS2 is pushed into the mounting frame 1, the first flange edge 21 of the PCS2 is connected to the mounting frame 1 by screws, which facilitates the fixing of the PCS2 on the mounting frame 1.

[0073] Optionally, in this embodiment, the AC / DC conversion circuit module has rollers 15 on the left and right side walls of the mounting frame 1 to facilitate the installation frame 1 (AC / DC conversion circuit module) being pushed into the cabinet of the energy storage system.

[0074] Optionally, in this embodiment, the AC / DC conversion circuit module has second flange edges 54 on the left and right sides of the front panel 5.

[0075] After the mounting frame 1 (AC / DC conversion circuit module) is pushed into the cabinet of the energy storage system, the second flange edge 54 of the front panel 5 is fixed to the cabinet with screws, which facilitates the fixing of the mounting frame 1 to the cabinet.

[0076] Example 2

[0077] Figure 9 This is a schematic diagram of the energy storage system in Embodiment 2 of this utility model.

[0078] This utility model also provides an energy storage system.

[0079] like Figure 9 As shown, the energy storage system of this embodiment includes: an energy storage cabinet 7, a battery pack 8, and an AC / DC conversion circuit module as described in the above embodiment.

[0080] The energy storage cabinet 7 includes: an energy storage battery area, a PCS integration area, and a busbar area. The energy storage battery area is located above the PCS integration area, and the busbar area is located on one side of the PCS integration area.

[0081] Multiple battery packs 8 are stacked vertically within the energy storage battery area of ​​the energy storage cabinet 7, and the AC / DC conversion circuit module (mounting frame) is slidably installed within the PCS integration area of ​​the energy storage cabinet 7.

[0082] In this embodiment, the AC / DC conversion circuit module is pushed into the energy storage cabinet 7 as a whole and fixed with bolts. Then, the positive and negative DC wiring interfaces 51 are connected to the battery pack 8, and the three-phase AC wiring interface 44 is connected to the busbar 9 inside the energy storage cabinet 7 via quick-connect terminals. Finally, the PCS is connected to the liquid cooling pipeline and control harness at the rear of the energy storage cabinet 7.

[0083] Ventilation mesh is provided on both sides of the AC / DC conversion circuit module. During operation, heat exchange air is provided by external heat exchange equipment to remove the heat generated by the aluminum busbar, fuse, and PCS, ensuring the reliability of electrical connections. The front panel is equipped with an acrylic glass observation window to observe the working status of devices such as fuses, DC disconnect switches, and AC circuit breakers. The positive and negative DC wiring interfaces and terminals on the front panel can be quickly plugged in and out. After opening the front panel cover, the three-phase AC wiring interfaces and terminals can be quickly plugged in and out.

[0084] In this utility model, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium.

[0085] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0086] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An AC / DC conversion circuit module, characterized in that, include: Mounting frame, PCS, fuses, AC / DC switch modules and front panel; The mounting frame is rectangular in shape. One end of the mounting frame is provided with an L-shaped guide rail, and the PCS is slidably mounted on the guide rail and connected to the mounting frame; The fuse, the front panel, and the AC / DC switch module are located at the other end of the mounting frame; The AC / DC switch module includes: a mounting plate, a DC disconnect switch, an AC circuit breaker, and a three-phase AC wiring interface; The mounting plate is disposed on the mounting frame and is spaced apart from the PCS. The DC disconnect switch, the AC circuit breaker and the three-phase AC wiring interface are disposed on the mounting plate. The front panel is provided with positive and negative DC wiring interfaces. The positive and negative DC wiring interfaces, the fuse, the DC disconnect switch, the PCS, the AC circuit breaker, and the three-phase AC wiring interface are connected by aluminum busbars to form an AC-DC conversion circuit.

2. The AC / DC conversion circuit module according to claim 1, characterized in that, The mounting plate is L-shaped and includes: a horizontal plate and a first side plate; The DC disconnect switch and the AC circuit breaker are mounted on the horizontal plate, and the three-phase AC wiring interface is mounted on the first side plate, located on the side wall of the mounting frame. The horizontal plate, the first side plate, the front panel, and the second side plate of the mounting frame form a rectangular frame, and the fuse is disposed on the second side plate of the mounting frame.

3. The AC / DC conversion circuit module according to claim 2, characterized in that, The length of the horizontal plate is less than the width of the mounting frame, and a notch is formed in the side wall of the mounting frame, with the three-phase AC wiring interface located in the notch; The front panel is provided with a working port, and a cover plate is hinged to the working port. The working port is positioned opposite to the notch. The cover plate is used to plug and unplug the three-phase AC terminals when it is open.

4. The AC / DC conversion circuit module according to claim 2, characterized in that, The top of the mounting frame is provided with a support rod; The horizontal plate is provided with a hanging part for hanging and fixing to the support rod.

5. The AC / DC conversion circuit module according to claim 2, characterized in that, Both the first side plate and the second side plate are provided with ventilation mesh.

6. The AC / DC conversion circuit module according to claim 1, characterized in that, The front panel is made of plexiglass to form an observation window.

7. The AC / DC conversion circuit module according to claim 1, characterized in that, The PCS has first flange edges on both sides for connecting to the mounting frame.

8. The AC / DC conversion circuit module according to claim 1, characterized in that, The mounting frame is equipped with rollers on both sides.

9. The AC / DC conversion circuit module according to claim 1, characterized in that, The front panel has second flange edges on both sides.

10. An energy storage system, characterized in that, include: Energy storage cabinet, battery pack, and AC / DC conversion circuit module as described in any one of claims 1 to 9; Multiple battery packs are stacked in the energy storage battery area of ​​the energy storage cabinet, and the AC / DC conversion circuit module is slidably installed in the PCS integration area of ​​the energy storage cabinet.

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