A battery module bracket

Abstract

This utility model relates to the field of battery module technology, specifically to a battery module bracket, including an integrated plate frame. Multiple tab holes are provided along the length of the integrated plate frame, and two rows of tab holes are arranged along the width of the integrated plate frame. A receiving cavity for accommodating a busbar is provided between adjacent tab holes in each row. The busbar is integrated with the integrated plate frame within the receiving cavity. The main body of this utility model is an integrated plate frame with a plate-frame structure. The tabs pass through the tab holes and are welded onto the battery busbar, realizing the series and parallel connection of the battery cells and improving the stability of the battery pack's electrical connection. Busbar placement positions are provided between the series tab holes of the battery pack, and the busbar is integrated onto the bracket using a hot-pressing method, improving the assembly efficiency and space utilization of the battery module. Simultaneously, the bottom of the integrated plate frame features protrusions on both sides for the assembly and positioning of the battery module, preventing damage to the tabs due to cell movement and improving the overall structural stability of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, and specifically to a battery module bracket. Background Technology

[0002] With the development of various technologies and applications in the new energy field, and the changes in the current international situation, new energy batteries have attracted much attention and have a huge market prospect. Soft-pack lithium-ion batteries have advantages such as light weight, high energy density, good safety performance, long cycle life, and large battery capacity, and have been widely used in the new energy field.

[0003] Compared to other types of battery packs, soft-pack lithium-ion battery packs require the positive and negative electrodes of the bare cells to be welded together in a series-parallel design. Then, the electrodes and connecting pieces are welded together to achieve the series-parallel connection between the cells. The bare cell electrodes are thin and easily damaged during stretching, making welding difficult. Furthermore, longer electrodes can create redundancy, leading to the risk of electrode insertion and potentially causing internal short circuits, resulting in battery failure. In existing technologies, to achieve insulation between the bare cell body and the electrodes, and to better weld and fix the electrodes to the battery connecting pieces, a battery module bracket is typically placed between the bare cell and the connecting pieces. However, due to the internal structure limitations of the bare cell, the designed battery module bracket is difficult to assemble, and the electrodes are easily damaged when passing through the module bracket. Welding within the module bracket after the electrodes have passed through is difficult and inefficient. Additionally, the regular module bracket structure cannot meet the requirements for lightweight battery packs. Utility Model Content

[0004] To address the aforementioned technical issues, this utility model provides a battery module bracket. The main body is an integrated plate frame with a one-piece structure. The electrode tabs pass through the electrode tab holes and are welded onto the battery busbar to achieve series and parallel connection of the battery cells, thereby improving the stability of the battery pack's electrical connection. Busbar placement positions are set between the series electrode tab holes of the battery pack, and the busbars are integrated onto the bracket using a hot-pressing method, which improves the assembly efficiency and space utilization of the battery module. At the same time, the bottom of the integrated plate frame is equipped with protrusions on both sides for the assembly and positioning of the battery module, preventing electrode tab damage due to cell movement and improving the overall structural stability of the battery pack.

[0005] This utility model is achieved through the following technical solution:

[0006] A battery module bracket includes an integrated board frame with multiple tab holes along its length. The tab holes are arranged in two rows along the width of the integrated board frame. A receiving cavity for accommodating a busbar is provided between adjacent tab holes in each row. The busbar is integrated with the integrated board frame within the receiving cavity.

[0007] More preferably, the integrated plate frame is provided with two transverse reinforcing ribs in the middle along the width direction, and longitudinal reinforcing ribs are provided between adjacent receiving cavities along the length direction.

[0008] In a further preferred embodiment, the integrated plate frame is provided with a plurality of positioning posts one evenly distributed along its length, which are used to position the insulating cover when the integrated plate frame is assembled with the insulating cover, and the positioning posts one are provided with screw holes.

[0009] In a further preferred embodiment, a second positioning post is provided on the inner side of each positioning post one. The height of the second positioning post is the same as that of the longitudinal reinforcing rib, and the second positioning post is provided with screw holes.

[0010] More preferably, the integrated plate frame has a fastening part along its length edge for fastening with the insulating cover, and rectangular grooves are provided on both the left and right sides of the fastening part for compensation of deviation when the fastening part is fastened.

[0011] More preferably, the integrated plate frame has multiple fixing protrusions on both sides of its lower surface along the length direction, and the fixing protrusions have screw holes for connection with the side plate screws.

[0012] The beneficial effects of this utility model are:

[0013] This utility model discloses a battery module bracket. The main body of the bracket is an integrated plate frame with a one-piece structure. The integrated plate frame has transverse and longitudinal reinforcing ribs inside, which increase the structural strength of the battery pack and provide a support surface and fixing position for the PCB sampling board. Tab holes are provided along the cell arrangement direction, and a busbar placement cavity is provided between the series tab holes of the battery pack. The module is integrated onto the integrated plate frame using a thermoforming method, improving the assembly efficiency and space utilization of the battery module. Multiple positioning posts (position 1 and positioning post 2) are provided on the longitudinal reinforcing ribs, which are used to fix the PCB board and the upper BMS board by screw connection, improving the overall structural stability of the battery pack. Fastening parts are provided on the edge of the integrated plate frame to fasten with the upper insulating cover, improving the insulation between the battery module and the high-voltage system. Screw holes are provided on the fixing protrusions at the bottom of the integrated plate frame, and the bracket is fixed to the side plate of the battery module by screw connection, further enhancing the structural stability of the battery pack.

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of a battery module bracket according to the present invention.

[0017] Figure 2 This is a schematic diagram of the bottom structure of a battery module bracket according to this utility model.

[0018] 1-Integrated plate frame, 2-Electrical ear hole, 3-Accommodation cavity, 4-Busbar, 5-Longitudinal reinforcing rib, 6-Positioning post one, 7-Positioning post two, 8-Screw post, 9-Snap-fitting part, 10-Fixing protrusion, 11-Transverse reinforcing rib. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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. They 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, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] A battery module bracket includes a PCB sampling board and an insulating cover sequentially mounted on top of the battery module bracket. The PCB sampling board is detachably connected to the battery module bracket, and the battery module bracket is fastened to the insulating cover. The two sides of the battery module bracket are connected to the side panels of the battery module. (Reference) Figure 1 and Figure 2 The battery module bracket includes an integrated plate frame 1, which serves as the main structure of the battery module bracket. It adopts an integrated plate frame structure. Multiple rectangular tab holes 2 are evenly provided along the length direction of the integrated plate frame 1. The tab holes 2 are arranged in two rows along the width direction of the integrated plate frame 1. A receiving cavity 3 is provided between each row of adjacent tab holes 2 to accommodate the busbar 4. The busbar 4 is integrated with the integrated plate frame 1 in the receiving cavity 3 by hot pressing, which improves the space utilization and assembly efficiency of the battery pack. The width of the receiving cavity 3 is greater than the width of the busbar 4, which facilitates the assembly and integration of the busbar 4. The height of the two sides of the receiving cavity 3 is lower than the thickness of the busbar 4, so that the tabs are welded to the busbar 4 at a certain angle to avoid damage to the tabs.

[0024] Preferably, the integrated plate frame 1 can be provided with positive and negative electrode tab holes of the same size along the width direction. The positive and negative electrode tabs of the battery cell pass through the tab holes 2 and are welded (lap welded) to the busbar 4 in the receiving cavity 3 of the integrated plate frame 1 to realize the series connection of the battery cells. The length and width dimensions of the tab hole 2 are 2.5 times the width and thickness of the tab, which facilitates the passage of the battery cell tabs and improves the assembly efficiency of the battery module.

[0025] The integrated plate frame 1 has two transverse reinforcing ribs 11 in the middle of the width direction, that is, in the middle of the two rows of receiving cavities 3. The integrated plate frame 1 has longitudinal reinforcing ribs 5 in the length direction between adjacent receiving cavities 3. The transverse reinforcing ribs 11 and longitudinal reinforcing ribs 5, on the basis of increasing the overall structural strength of the bracket, together provide a placement position for the PCB sampling plate. The height of the reinforcing ribs is higher than the busbar 4 by a certain distance, which increases the overall electrical safety of the battery pack. The PCB sampling plate is fixed by screw connection. Under the premise of increasing the overall strength of the battery pack and improving the structural stability of the battery pack, the energy density of the battery pack is improved.

[0026] Multiple cylindrical positioning posts 6 are evenly distributed along the length of the integrated board frame 1. These posts are used to position the insulating cover during assembly of the integrated board frame 1 and the insulating cover. The positioning posts 6 have screw holes inside. The insulating cover passes through the positioning posts 6 and is fastened to the integrated board frame 1. The multi-layer fixing plate arranged above the insulating cover passes through the positioning posts 6. The BMS board is connected to the screw holes by screws, which improves the overall structure of the battery pack.

[0027] Positioning post 2 7 is provided inside each positioning post 6. Positioning post 1 6 is higher than positioning post 2 7. The height of positioning post 2 7 is the same as that of longitudinal reinforcing rib 5. Positioning post 2 7 and longitudinal reinforcing rib 5 together provide support for the placement of PCB sampling board. Positioning post 2 7 has screw holes inside and protrudes at the bottom. The PCB sampling board is fixed in the bracket by screw connection, which improves the structural strength and electrical safety of battery pack.

[0028] The integrated board frame 1 has two screw posts 8 on both the positive and negative output busbars 4. That is, two screw posts 8 are set at each end of the integrated board frame 1, and the positive busbar 4 is connected to the input copper busbar and the negative busbar 4 is connected to the output copper busbar by means of nuts. This realizes the connection between the battery module and the high voltage system.

[0029] The integrated plate frame 1 has a fastening part 9 along its length edge. The fastening part 9 is used to electrically connect the battery module to the upper high voltage system through an interference fit with the insulating cover above the integrated plate frame 1, thereby improving the overall electrical safety of the battery pack. The fastening part 9 has rectangular grooves on both the left and right sides for compensation of deviation when the fastening part 9 is fastened. The fastening part 9 has a lower part that is flush with the edge of the integrated plate frame 1 and an upper part that is convex, which can ensure the structural stability of the integrated plate frame 1 after assembly with the insulating cover and improve the overall insulation performance of the battery pack.

[0030] Multiple fixing protrusions 10 are provided on both sides of the lower surface of the integrated plate frame 1 along the length direction. Screw holes are opened in the fixing protrusions 10, and they are fixed to the side plate by screw connection to prevent the battery cells from moving after assembly and causing damage to the tabs, thereby improving the overall structural stability and electrical safety of the battery pack.

[0031] This utility model discloses a battery module bracket. The bracket adopts an integrated plate frame 1 with a plate-frame integrated structure. Along its length, evenly distributed tab holes 2 are provided according to the cell arrangement. The tabs pass through the tab holes 2 and are welded onto the battery busbar 4, realizing the series and parallel connection of the cells and improving the stability of the battery pack's electrical connection. The integrated plate frame 1 has internal reinforcing ribs, and some of the reinforcing ribs have staggered battery busbar 4 receiving cavities 3. The busbar 4 is integrated with the integrated plate frame 1 by thermoforming. The integrated plate frame 1 has positioning posts 6 and 7 inside, used to fix the PCB sampling board and the top BMS and high-voltage device fixing plate, respectively. The edge of the integrated plate frame 1 has fastening parts 9, which fasten with the upper insulating cover to insulate the battery module from external high-voltage devices. Fixing protrusions 10 on both sides of the bottom of the integrated plate frame 1 are used for positioning and fixing the battery cells during assembly. The integrated plate frame 1 improves the space utilization of the battery module, enhances the insulation performance of the battery pack while meeting the requirements for lightweight battery packs, and also improves the overall strength of the battery pack.

[0032] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A battery module bracket, characterized in that: The system includes an integrated plate frame (1), which has a plurality of tab holes (2) along its length. The tab holes (2) are arranged in two rows along the width of the integrated plate frame (1). In each row, there is a receiving cavity (3) between adjacent tab holes (2) for accommodating a busbar (4). The busbar (4) is integrated with the integrated plate frame (1) in the receiving cavity (3).

2. The battery module bracket according to claim 1, characterized in that: The integrated plate frame (1) has two transverse reinforcing ribs (11) in the middle along the width direction, and the integrated plate frame (1) has longitudinal reinforcing ribs (5) between adjacent receiving cavities (3) along the length direction.

3. A battery module bracket according to claim 2, characterized in that: The integrated plate frame (1) is provided with a plurality of positioning posts (6) evenly distributed along its length, which are used to position the insulating cover when the integrated plate frame (1) is assembled with the insulating cover. The positioning posts (6) are provided with screw holes.

4. A battery module bracket according to claim 3, characterized in that: Positioning post 2 (7) is provided inside each of the positioning post 1 (6). The height of the positioning post 2 (7) is the same as that of the longitudinal reinforcing rib (5). The positioning post 2 (7) is provided with screw holes.

5. A battery module bracket according to claim 1, characterized in that: The integrated plate frame (1) has a fastening part (9) along its length edge for fastening with the insulating cover. The fastening part (9) has rectangular grooves on both the left and right sides for compensation of deviation when the fastening part (9) is fastened.

6. A battery module bracket according to claim 1, characterized in that: The integrated plate frame (1) has multiple fixing protrusions (10) on both sides of its lower surface along the length direction. The fixing protrusions (10) have screw holes for connecting with the side plate screws.

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