Low-cost and high-safety energy storage device

Abstract

The utility model discloses an energy storage device with low cost and high safety. The energy storage device comprises an inverter board, a battery BMS board, a battery assembly and a connecting assembly. The inversion plate, the battery BMS plate and the battery assembly are vertically arranged from top to bottom and are assembled in the accommodating space of the energy storage device shell; the inversion board is fixedly and electrically connected with the battery BMS board through the connecting assembly. Cable connection between the inverter board and the battery BMS board is changed into fixed electric connection of the connecting assembly, and the connecting assembly is connected with the ground wire on the battery BMS board, so that assembly is simple, cost is reduced, potential safety hazards are reduced, the product development cycle is shortened, and products are promoted to be put into the market in advance.

Description

Technical Field

[0001] This utility model relates to the field of energy storage device technology, and in particular to a low-cost, highly secure energy storage device. Background Technology

[0002] In the current energy storage market, cost pressures pose significant challenges in structural and electronic circuit layout design to meet market demands. One major issue is the connection between the BMS protection board (battery panel) on the battery pack (battery module) and the high-voltage line on the inverter PCB. Most energy storage products on the market use XT90 connectors for this connection. Regardless of whether the XT90 connector on the pack or the inverter board is plugged in first, the last connection will result in high-voltage operation. This can easily generate high-voltage contact sparks at the moment of connection, posing a potential safety hazard in production.

[0003] Therefore, it is necessary to redesign the structure and connection structure of existing energy storage products to solve the safety hazards of high-voltage inverter connections, while effectively reducing costs. Utility Model Content

[0004] Existing energy storage products have an unreasonable structural layout, posing safety hazards and high product costs.

[0005] To address the aforementioned issues, a low-cost, high-safety energy storage device is proposed. By replacing the XT90 cable connection between the inverter board and the battery BMS board with a fixed electrical connection via a connecting component, and connecting the connecting component to the ground wire on the battery BMS board, assembly is simplified, costs are reduced, safety hazards are reduced, product development cycles are shortened, and products can be launched to the market sooner.

[0006] A low-cost, highly secure energy storage device, comprising:

[0007] Inverter board;

[0008] Battery BMS board;

[0009] Battery components;

[0010] Connection components;

[0011] The inverter board, battery BMS board, and battery modules are arranged vertically from top to bottom and assembled in the housing space of the energy storage device.

[0012] The inverter board is electrically and fixedly connected to the battery BMS board via the connecting assembly.

[0013] In the first possible embodiment of the low-cost, high-safety energy storage device described in this utility model, the number of the connecting components is two, which are used for positive and negative electrical connections respectively.

[0014] In conjunction with the first possible embodiment of this utility model, in the second possible embodiment, the connecting component includes:

[0015] Connector;

[0016] Connecting bolts;

[0017] The connecting frame is welded and fixed to the battery BMS board and is provided with bolt holes;

[0018] The connecting bolt passes through the inverter board and is fitted with the bolt hole to connect and fix the inverter board to the battery BMS board.

[0019] In conjunction with the second possible implementation of this utility model, in the third possible implementation, the connecting frame is in the form of an inverted U-shape, and a plurality of connecting feet are provided at the end of the inverted U-shape. The connecting frame is fixed on the battery BMS board by bending and welding the connecting feet and connecting them to the ground wire on the battery BMS board.

[0020] In conjunction with the third and fourth possible embodiments of this utility model, the bolt hole is located at the top center of the inverted U-shaped structure, and the connecting bracket is brought into contact with the inverter plate by tightening the connecting bolt, so as to make electrical connection.

[0021] In conjunction with the fourth possible implementation of this utility model, and the fifth possible implementation, the battery assembly includes;

[0022] First fixed frame;

[0023] Battery pack;

[0024] The battery pack is fixedly housed in the first mounting frame;

[0025] The battery BMS board is fixed on the first mounting bracket.

[0026] In conjunction with the fifth possible embodiment of this utility model, in the sixth possible embodiment, the energy storage device further includes:

[0027] Second mounting bracket;

[0028] The second fixing bracket is fixedly assembled in the receiving space of the energy storage device housing;

[0029] The inverter board is fixed on the second mounting bracket.

[0030] In conjunction with the sixth and seventh possible embodiments of this utility model, the connection position of the inverter board is provided with a through hole on the second fixing frame at the connection position; the connecting bolt passes through the through hole and is bolted to the connecting frame.

[0031] In conjunction with the seventh and eighth possible embodiments of this utility model, the connecting frame is made of either copper or aluminum.

[0032] In conjunction with the eighth and ninth possible embodiments of this utility model, the current-bearing range of the connecting frame is 30A-40A.

[0033] The present invention provides a low-cost, high-safety energy storage device by replacing the XT90 cable connection between the inverter board and the battery BMS board with a fixed electrical connection via a connecting component. The connecting component is then connected to the ground wire on the battery BMS board. This not only simplifies assembly and reduces costs but also reduces safety hazards, shortens product development cycles, and allows the product to be launched to the market sooner. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structural layout of a low-cost, high-safety energy storage device according to the present invention.

[0036] Figure 2 This is a schematic diagram of the structure of a low-cost, high-safety energy storage device according to the present invention.

[0037] Figure 3 This is a schematic diagram of the connecting frame structure of a low-cost, high-safety energy storage device according to this utility model;

[0038] Figure 4 This is a schematic diagram of the second fixing frame structure of a low-cost, high-safety energy storage device according to the present invention. Detailed Implementation

[0039] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this utility model.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0044] Existing energy storage products have an unreasonable structural layout, posing safety hazards and high product costs.

[0045] To address the above problems, a low-cost, highly secure energy storage device is proposed. For example... Figure 1 , Figure 1This is a schematic diagram of the structural layout of a low-cost, high-safety energy storage device according to the present invention. The low-cost, high-safety energy storage device includes an inverter board 100, a battery BMS board 300, a battery module 400, and a connecting component 200. The inverter board 100, battery BMS board 300, and battery module 400 are arranged vertically from top to bottom and assembled in the receiving space of the energy storage device housing 600. The inverter board 100 is fixedly electrically connected to the battery BMS board 300 via the connecting component 200. By replacing the XT90 cable connection between the inverter board 100 and the battery BMS board 300 with a fixed electrical connection via the connecting component 200, and connecting the connecting component 200 to the ground wire on the battery BMS board 300, assembly is simplified, costs are reduced, safety hazards are reduced, product development cycles are shortened, and the product can be launched to the market earlier.

[0046] Furthermore, such as Figure 2 , Figure 2 This is a schematic diagram of the structure of a low-cost, high-safety energy storage device according to the present invention; there are two connecting components 200, which are used for positive and negative electrical connections respectively.

[0047] In one implementation scenario, the energy storage device also includes an AC socket and an AC bracket. The AC socket is mounted on the AC bracket, which is fixed in the space inside the housing 600. The AC socket is connected to high voltage (110V~220V), which is converted to low voltage by the inverter board 100 and output to the power consumption unit.

[0048] In this scenario, a shorter connecting cable is used to connect the high-voltage power supply and the inverter board 100, thereby reducing battery radiation and mutual interference.

[0049] In this embodiment, instead of a traditional cable connection, a connection component 200 is used to fix the inverter board 100 and the battery BMS board 300 in an electrical connection, which improves process efficiency and reduces resistance and loss during transmission.

[0050] This can be understood as follows: the battery assembly 400 is fixed to the bottom of the housing 600, the battery BMS board 300 is fixed to the first fixing frame 410 of the battery assembly 400, the second fixing frame 500 is assembled in the receiving space, the inverter board 100 is fixed to the second fixing frame 500, the connecting component 200 passes through the inverter board 100, and the second fixing frame 500 fixes the inverter board 100 and the battery BMS board 300 in a fixed electrical connection.

[0051] Specifically, such as Figure 2The connection assembly 200 includes a connection frame 220 and a connection bolt 210. The connection frame 220 is welded and fixed to the battery BMS board 300 and is provided with bolt holes 222. The connection bolt 210 passes through the inverter board 100 and is adapted to the bolt holes 222 for connection, thereby fixing and electrically connecting the inverter board 100 and the battery BMS board 300.

[0052] Preferably, such as Figure 3 , Figure 3 This is a schematic diagram of the connecting frame 220 of a low-cost, high-safety energy storage device according to this utility model. The connecting frame 220 has an inverted U-shaped structure, and multiple connecting feet 221 are provided at the end of the inverted U-shaped structure. The connecting frame 220 is fixed to the battery BMS board 300 by bending and welding the connecting feet 221 and connecting them to the ground wire on the battery BMS board 300.

[0053] Preferably, the bolt hole 222 is located at the top center of the inverted U-shaped structure. By tightening the connecting bolt 210, the connecting bracket 220 is brought into contact with the inverter board 100 for electrical connection.

[0054] The connector 220 is connected to the ground wire on the battery BMS board 300, thereby avoiding instantaneous electrical sparks during connection.

[0055] Specifically, the battery assembly 400 includes a first mounting bracket 410 and a battery pack (not shown in the figure); the battery pack (not shown in the figure) is fixedly housed in the first mounting bracket 410; and the battery BMS board 300 is fixed on the first mounting bracket 410.

[0056] The battery BMS board 300 is bolted to the first fixing bracket 410.

[0057] Furthermore, such as Figure 2 The energy storage device also includes a second mounting frame 500; such as Figure 4 , Figure 4 This is a schematic diagram of the second fixing frame structure of a low-cost, high-safety energy storage device according to the present invention. The second fixing frame 500 is fixedly assembled in the accommodating space of the energy storage device housing 600; the inverter plate 100 is fixed on the second fixing frame 500.

[0058] The second mounting bracket 500 is partially fixed to the housing 600, and the other part extends into the space between the inverter board 100 and the battery BMS board 300 to fix the inverter board 100, thereby achieving a vertical arrangement of the inverter board 100 and the battery BMS board 300. This facilitates the fixing of electrical connections.

[0059] Furthermore, at the connection position of the inverter board 100, the second fixing bracket 500 at the connection position is provided with through holes 510; the connecting bolts 210 pass through the through holes and are bolted to the connecting bracket 220.

[0060] Preferably, the connector 220 is made of either copper or aluminum. The connector 220 can be made of various metals suitable for electrical connection, but copper is preferred.

[0061] Preferably, the current-bearing range of the connecting bracket 220 is 30A-40A.

[0062] The present invention provides a low-cost, high-safety energy storage device by replacing the XT90 cable connection between the inverter board 100 and the battery BMS board 300 with a fixed electrical connection via a connection component 200. The connection component 200 is connected to the ground wire on the battery BMS board 300. This not only simplifies assembly and reduces costs, but also reduces safety hazards, shortens product development cycles, and facilitates earlier market entry.

[0063] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low-cost, highly secure energy storage device, characterized in that it comprises: Inverter board; Battery BMS board; Battery components; Connection components; The inverter board, battery BMS board, and battery modules are arranged vertically from top to bottom and assembled in the housing space of the energy storage device. The inverter board is electrically and fixedly connected to the battery BMS board via the connecting assembly.

2. The low-cost, high-security energy storage device according to claim 1, characterized in that, The number of connection components is two, which are used for positive and negative electrical connections respectively.

3. The low-cost, high-security energy storage device according to claim 2, characterized in that, The connection component includes: Connector; Connecting bolts; The connecting frame is welded and fixed to the battery BMS board and is provided with bolt holes; The connecting bolt passes through the inverter board and is fitted with the bolt hole to connect and fix the inverter board to the battery BMS board.

4. The low-cost, high-security energy storage device according to claim 3, characterized in that, The connecting frame has an inverted U-shaped structure, and multiple connecting feet are provided at the end of the inverted U-shaped structure. The connecting frame is fixed on the battery BMS board by bending and welding the connecting feet and connecting them to the ground wire on the battery BMS board.

5. The low-cost, high-security energy storage device according to claim 4, characterized in that, The bolt hole is located at the top center of the inverted U-shaped structure. By tightening the connecting bolt, the connecting bracket is brought into close contact with the inverter board for electrical connection.

6. The low-cost, high-security energy storage device according to claim 5, characterized in that, The battery assembly includes; First fixed frame; Battery pack; The battery pack is fixedly housed in the first mounting frame; The battery BMS board is fixed on the first mounting bracket.

7. The low-cost, high-security energy storage device according to claim 6, characterized in that, The energy storage device also includes: Second mounting bracket; The second fixing bracket is fixedly assembled in the receiving space of the energy storage device housing; The inverter board is fixed on the second mounting bracket.

8. The low-cost, high-security energy storage device according to claim 7, characterized in that, The inverter board has through holes at the connection point and the second fixing bracket at the connection point; the connecting bolt passes through the through holes and is bolted to the connecting bracket.

9. The low-cost, high-security energy storage device according to any one of claims 3-8, characterized in that, The connecting frame is made of either copper or aluminum.

10. The low-cost, high-security energy storage device according to claim 9, characterized in that, The current-carrying capacity of the connecting frame is 30A-40A.

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