Busbar integrated assembly, battery module and battery pack

Abstract

The utility model discloses a busbar integrated assembly, a battery module and a battery pack, the busbar integrated assembly comprises a tray, a busbar and an FPC (Flexible Printed Circuit) board, and further comprises a fixing plate and a fixing piece, the busbar is fixed on the tray; the FPC board is located on one side of the busbars and fixed on the tray, and the FPC board is electrically connected with the busbars; the fixing plate is located on the side, away from the tray, of the busbar, one end of the fixing plate is rotationally connected with the tray, the fixing plate is fixed to the tray through the fixing piece, and the collection assembly of the FPC board is installed on the fixing plate. Through the structural arrangement of the fixing plate, when the busbar is welded, the busbar can be welded by turning over the fixing plate, normal welding of the busbar is guaranteed, connectors can be fixedly connected, assembly is simple, reliability is high, and large-scale production is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a busbar integrated component, a battery module, and a battery pack. Background Technology

[0002] To improve the energy density of battery packs, various companies have launched large module and CTP (Cell to Pack) technology solutions, with the blade battery's CTP solution being one of the mainstream technologies. Because the blade battery's terminals are located on both sides of the battery, busbar welding and sampling need to be performed on the sides, which increases the assembly difficulty of the battery pack and places higher demands on the manufacturing process.

[0003] Existing busbar integration structures typically consist of a tray, a busbar, and an FPC (Flexible Printed Circuit) board. The FPC board and busbar are mounted parallel to each other on the tray, with the FPC board positioned above or below the busbar. Nickel strips on the FPC board are soldered to the busbar to collect battery voltage and temperature signals. However, this integrated structure becomes unsuitable when the Y and Z axes of the battery pack are limited, or when the busbar needs to meet high overcurrent requirements. This is because: 1. Meeting high overcurrent requirements necessitates increasing the busbar's size, and insufficient Z-axis space in the battery pack prevents the FPC board from being mounted parallel to the busbar on the tray; 2. Due to insufficient Y and Z-axis space, the connectors on the FPC board can only be placed in the X-axis, which interferes with the busbar soldering fixtures, affecting the busbar soldering. Ensuring the soldering of the busbar to the battery terminals without affecting battery signal acquisition and connector fixation is a key consideration in battery pack design. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a busbar integrated component, a battery module, and a battery pack, which can ensure the welding of the busbar and the battery terminals, while not affecting the acquisition of battery signals and the fixing of connectors.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model first provides a bus integrated assembly, which also includes a fixing plate and a fixing member; the busbars are fixed side by side on the tray; the FPC board is located on one side of the busbar and fixed on the tray, and the FPC board is electrically connected to each busbar; the fixing plate is located on the side of the busbar away from the tray and one end of the fixing plate is rotatably connected to the tray, the fixing member fixes the fixing plate on the tray, and the acquisition component of the FPC board is installed on the fixing plate.

[0007] As a further improvement to the above-mentioned solution of this utility model, the tray has a long strip structure, with an integrally formed edge perpendicular to it on one side along its length. The FPC board is fixed to the edge by riveting. The FPC board has a folded edge perpendicular to it, and a nickel sheet is provided on the folded edge, which is electrically connected to the busbar. To avoid warping and deformation of the folded edge of the FPC board, a riveting process is used to rivet the FPC board to the tray.

[0008] As a further improvement of the above-mentioned solution of this utility model, a rotating shaft is provided on the side of the tray near the edge, and a bushing is provided on the fixing plate, with the bushing and the rotating shaft being rotatably connected.

[0009] As a further improvement of the above-mentioned solution of this utility model, the busbar integrated assembly also includes plastic rivets, mounting holes are provided on the fixing plate, and through holes coaxially arranged with the mounting holes are also provided on the busbar covered by the fixing plate. Through holes coaxially arranged with the through holes are provided on the tray. The plastic rivets pass through the mounting holes, through holes and through holes in sequence to fix the fixing plate and the tray.

[0010] As a further improvement to the above-mentioned solution of this utility model, the bus integrated assembly also includes an output bus, which is fixed on the tray and electrically connected to the FPC board.

[0011] As a further improvement of the above-mentioned solution of this utility model, the acquisition component of the FPC board includes an acquisition component and a connector integrated together. A rivet post is provided on the fixing plate, and an insertion hole adapted to the rivet post is provided on the acquisition component. The rivet post extends into the insertion hole and is fixed together with the acquisition component by heat riveting.

[0012] As a further improvement of the above-mentioned solution of this utility model, the tray is provided with mounting grooves at intervals along its length, and the busbar is fixed in the mounting groove.

[0013] This utility model also provides a battery module, which includes the bus integrated assembly as described above.

[0014] As a further improvement of the above-mentioned solution of this utility model, the battery module further includes multiple individual battery cells and two end plates; the multiple individual battery cells are arranged side by side to form a battery pack, and a heat insulation pad is provided between any two adjacent individual battery cells and the heat insulation pad is bonded to the two adjacent individual battery cells; the two end plates are respectively provided on both sides of the width direction of the battery pack, and foam is bonded to the side of the end plate facing the individual battery cell and the foam is bonded to the individual battery cell; two busbar integration assemblies are provided, and the two busbar integration assemblies are respectively assembled on both sides of the length direction of the battery pack.

[0015] This utility model also provides a battery pack, which includes the battery module as described in 9 above.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention utilizes a fixed plate structure. During busbar welding, the fixed plate can be flipped to weld the busbar, ensuring proper welding while simultaneously securing the FPC board's acquisition components. This simplifies assembly, enhances reliability, and facilitates mass production. Furthermore, an edge is provided on the tray for securing the FPC board. In situations where Y and Z-axis space is limited in the battery pack, the X-axis space is fully utilized, resolving issues related to busbar and battery terminal welding, as well as battery signal acquisition and connector securing, when Y and Z-axis space is restricted. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of a busbar integrated component proposed in an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of a busbar integrated assembly in which the fixing plate is in a flipped state, according to an embodiment of the present invention.

[0020] Figure 3 for Figure 2 Another perspective view;

[0021] Figure 4 This is a schematic diagram of the structure of a battery module according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the assembly principle of a battery module proposed in an embodiment of the present invention.

[0023] Reference numerals: 1. Busbar integrated assembly; 11. Tray; 111. Edge; 112. Shaft; 113. Through hole; 114. Mounting slot; 12. Busbar; 121. Via; 13. FPC board; 131. Connector; 132. Acquisition component; 1321. Insertion hole; 14. Fixing plate; 141. Bushing; 142. Mounting hole; 143. Rivet; 15. Plastic rivet; 16. Output busbar; 2. Cell; 3. End plate; 4. Heat insulation pad; 5. Foam. Detailed Implementation

[0024] To facilitate understanding of this invention, a more comprehensive description of the invention will be provided below with reference to specific embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this invention.

[0025] 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 in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] Reference Figures 1-3 This embodiment proposes a busbar integrated assembly, which includes a tray 11, a busbar 12, an FPC board 13 and a fixing plate 14, and may also include plastic rivets 15 and an output busbar 16.

[0027] The tray 11 has a long strip structure, and one side of the tray 11 is integrally formed with an edge 111 perpendicular to it. A pivot 112 is provided on the tray 11 near the edge 111. A mounting groove 114 is provided on the side of the tray 11 away from the edge 111, and two through holes 113 are provided on the side of the tray 11 away from the edge 111.

[0028] Bus 12 is secured in mounting slot 114. Through holes 121 are provided on bus 12 at positions corresponding to the two through holes 113. The two through holes 121 are coaxially arranged with the two through holes 113 respectively. Output bus 16 is also fixed to one end of tray 11.

[0029] A fixing plate 14 is located on the side of the busbar 12 away from the tray 11. A bushing 141 is provided at one end of the fixing plate 14 near the edge 111. The bushing 141 is rotatably connected to the rotating shaft 112 of the tray 11, allowing the fixing plate 14 to be flipped. Mounting holes 142 are provided on the fixing plate 14 at positions corresponding to the two through holes 121, and the two mounting holes 142 are coaxially arranged with the two through holes 121. Three rivets 143 are provided on the side of the fixing plate 14 away from the busbar 12, and the three rivets 143 are distributed in a triangular pattern.

[0030] The FPC board 13 is fixed to the edge 111 by riveting. The FPC board 13 has a folded edge perpendicular to it, and multiple nickel strips are provided on the folded edge, which are electrically connected to the busbar 12 and the output busbar 16. The acquisition component of the FPC board 13 includes an integrated connector 131 and an acquisition component 132. The acquisition component 132 has three holes 1321, which are arranged in a triangle. The three rivets 143 on the fixing plate 14 extend into the three holes 1321 of the acquisition component 132 and are fixed to the acquisition component 132 by thermal riveting.

[0031] Plastic rivets 15 are used to fix the fixing plate 14 onto the tray 11. In this embodiment, there are two plastic rivets 15. The two plastic rivets 15 pass through two mounting holes 142, two through holes 121, and two through holes 113 in sequence, thereby fixing the fixing plate 14 onto the tray 11.

[0032] In this embodiment, the structure of the fixing plate 14 allows for the welding of the busbar 12 by flipping the fixing plate 14. This ensures the normal welding of the busbar 12 and also securely connects the acquisition components of the FPC board. The assembly is simple, reliable, and easy for mass production. At the same time, an edge 111 is provided on the tray 11 for fixing the FPC board 13. When the Y and Z directions of the battery pack are limited, the X direction space is fully utilized. This solves the problems of welding the busbar 12 and the battery terminals, as well as the acquisition of battery signals and the fixation of the acquisition components when the Y and Z directions of the battery pack are limited.

[0033] Reference Figure 3 , Figure 4 Based on the above-mentioned busbar integrated assembly, this embodiment also provides a battery module, which includes multiple battery cells 2, two end plates 3 and two of the above-mentioned busbar integrated assemblies 1.

[0034] Multiple battery cells 2 are arranged side by side to form a battery pack. A heat insulation pad 4 is placed between any two adjacent battery cells 2, and the heat insulation pad 4 is bonded to the two adjacent battery cells 2. Two end plates 3 are respectively located on both sides of the battery pack's width direction. Foam 5 is bonded to the side of the end plate 3 facing the battery cell 2, and the foam 5 is bonded to the battery cell 2. Two busbar integrated assemblies 1 are respectively assembled on both sides of the battery pack's length direction.

[0035] In this embodiment, during battery module assembly, the two end plates 3 are first bonded to the two foams 5 respectively, and set aside. Multiple battery cells 2 are stacked sequentially in the Y direction, and heat insulation pads 4 are bonded between adjacent battery cells 2 to complete the battery pack assembly. The two end plates 3 are then assembled on both sides of the battery pack in the Y direction, and the foams 5 are bonded to the battery cells 2. Subsequently, busbar integration assemblies 1 are assembled on both sides of the battery pack in the X direction. The tray 11 is first installed in place, and then the busbar 12 and the output busbar 16 are welded to the terminals of the battery cells 2. Before welding, the fixing plate 14 needs to be rotated upwards by 180° to avoid affecting the normal welding of the busbar 12 and the output busbar 16. After the busbar 12 and the output busbar 16 are welded, the fixing plate 14 is rotated back to its original position, and plastic rivets 15 are used to sequentially pass through the corresponding mounting holes 142, through holes 121, and through holes 113 to connect the fixing plate 14 and the tray 11. At this point, the installation of the entire battery module is completed. The X, Y, and Z directions mentioned above are all perpendicular to each other.

[0036] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0037] 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 "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A busbar integration assembly comprising a tray (11), a busbar (12), and an FPC board (13), characterized in that, It also includes a fixing plate (14); busbars (12) are fixed on the tray (11); FPC board (13) is located on one side of the busbars (12) and fixed on the tray (11), and the FPC board (13) is electrically connected to each busbar (12); the fixing plate (14) is located on the side of the busbars (12) away from the tray and one end of the fixing plate (14) is rotatably connected to the tray (11), and the acquisition components of the FPC board (13) are installed on the fixing plate (14).

2. The bus integration component according to claim 1, characterized in that, The tray (11) is a long strip structure. One side of the tray (11) is integrally formed with a perpendicular edge (111). The FPC board (13) is fixed to the edge (111) by riveting. The FPC board (13) has a folded edge perpendicular to it. A nickel sheet is provided on the folded edge and the nickel sheet is electrically connected to the busbar (12).

3. The bus integration component according to claim 2, characterized in that, A rotating shaft (112) is provided on one side of the tray (11) near the edge (111), and a bushing (141) is provided on the fixing plate (14). The bushing (141) and the rotating shaft (112) are rotatably connected.

4. The bus integration component according to claim 1, characterized in that, The busbar integration assembly also includes plastic rivets (15), mounting holes (142) are provided on the fixing plate (14), and a through hole (121) coaxially arranged with the mounting hole (142) is also provided on the busbar (12) covered by the fixing plate (14). A through hole (113) coaxially arranged with the through hole (121) is provided on the tray (11). The plastic rivets (15) pass through the mounting hole (142), the through hole (121), and the through hole (113) in sequence to fix the fixing plate (14) and the tray (11) in a fixed connection.

5. The bus integration component according to claim 1, characterized in that, The bus integration assembly also includes an output bus (16), which is fixed on the tray (11) and electrically connected to the FPC board (13).

6. The bus integration component according to claim 1, characterized in that, The acquisition component of the FPC board (13) includes an integrated connector (131) and acquisition piece (132). A rivet (143) is provided on the fixing plate (14), and an insertion hole (1321) adapted to the rivet (143) is provided on the acquisition piece (132). The rivet (143) extends into the insertion hole (1321) and is fixed together with the acquisition piece (132) by heat riveting.

7. The bus integration component according to claim 2, characterized in that, The tray (11) has mounting slots (114) spaced along its length, and the busbar (12) is secured in the mounting slots (114).

8. A battery module, characterized in that, It includes the bus integration component (1) as described in any one of claims 1-7.

9. The battery module according to claim 8, characterized in that, The battery module also includes multiple battery cells (2) and two end plates (3); the multiple battery cells (2) are arranged side by side to form a battery pack, and a heat insulation pad (4) is provided between any two adjacent battery cells (2) and the heat insulation pad (4) is bonded to the two adjacent battery cells (2); the two end plates (3) are respectively arranged on both sides of the width direction of the battery pack, and foam (5) is bonded to the side of the end plate (3) facing the battery cell (2) and the foam (5) is bonded to the battery cell (2); there are two busbar integration components (1), and the two busbar integration components (1) are respectively assembled on both sides of the length direction of the battery pack.

10. A battery pack, characterized in that, It includes the battery module as described in claim 8 or 9.

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