Electric signal connection structure of battery module

Abstract

The utility model discloses an electric signal connection structure of a battery module. The electric signal connection structure comprises at least one battery cell group, at least one circuit board, a busbar, an electric connection sheet and / or an electric connection column, one end of the electric connection sheet is electrically connected with the busbar, and the other end is bent and electrically connected to the circuit board. One end of the electric connecting column is electrically connected with the busbar, and the other end of the electric connecting column penetrates through the circuit board and is electrically connected with the circuit board. Through the application of the electric connection sheets and the electric connection columns on the electric signal connection structure, the utilization effect of the internal space of the battery module can be optimized.

Description

Technical Field

[0001] This application relates to the field of battery modules, and particularly to an improved electrical signal connection structure for a battery module. Background Art

[0002] With the wide popularization of electronic products and electric vehicles, the demand for battery modules is increasing day by day. The performance and reliability of battery modules directly affect the usage experience and lifespan of these products. As Figure 1 shown, in the prior art, the battery cell group of the battery module 100 usually uses a metal bus bar (BusBar Plate) 110 and a flexible printed circuit board (Flexible Printed Circuit, FPC) 120 to be electrically connected to a nickel sheet (BusBar) 130. However, this design limits the space utilization efficiency of the battery module to a certain extent, and there are also certain problems with connection stability.

[0003] In the prior art, common electrical connection methods are as follows: for example, the nickel sheet 130 on the flexible printed circuit board 120 is laser welded to the metal bus bar 110, and then the signal is transmitted to a circuit board 140 with a BMS (Battery Management System) through a flexible printed circuit board connector. However, this design occupies more space, and when the flexible printed circuit board 120 is damaged by sharp components on the circuit board 140 with a BMS, problems such as short circuit or open circuit may occur.

[0004] The disadvantages of the above prior art are that the internal space utilization of the battery module is not fully optimized, and there are deficiencies in connection reliability and anti-vibration performance. Therefore, there is an urgent need for a new electrical signal connection structure to solve these problems and improve the overall performance of the battery module. Summary of the Utility Model

[0005] The purpose of this application is to provide a new electrical signal connection structure for a battery module. By improving the structure and connection method of the electrical connection piece, the internal space of the battery module is significantly saved, and the stability and anti-vibration performance of the electrical connection are improved.

[0006] To achieve the above purpose, this application proposes an electrical signal connection structure for a battery module, including at least one battery cell group, at least one circuit board, a bus bar, and an electrical connection piece. One end of the electrical connection piece is electrically connected to the bus bar, and the other end is electrically connected to the circuit board after being bent.

[0007] Optionally, at least one first welding pad is provided at the edge of the circuit board. Welding parts are respectively provided on the busbar corresponding to the positions of each of the first welding pads. The at least one electrical connection piece is respectively a C-shaped metal piece. One end of each C-shaped metal piece is welded to one of the at least one welding pads, and the other end of each C-shaped metal piece is welded to the corresponding welding part.

[0008] Optionally, the electrical signal connection structure of the battery module further includes at least one electrical connection post. First through holes are respectively provided on the circuit board corresponding to the positions of each of the electrical connection posts. One end of the electrical connection post is electrically connected to the busbar, and the other end passes through the corresponding first through hole and is electrically connected to the circuit board.

[0009] Optionally, second welding pads are respectively provided on the circuit board at the edges of each of the first through holes. The other end of each electrical connection post is welded to the corresponding second welding pad.

[0010] Optionally, a part of the busbar is bent and passes through the circuit board to form a connection part. Second through holes are respectively provided on the circuit board corresponding to the positions of each of the connection parts. Third welding pads are respectively provided on the circuit board at the edges of each of the second through holes. Each connection part is welded to the corresponding third welding pad.

[0011] The present application also provides another electrical signal connection structure of a battery module, including at least one battery cell group, at least one circuit board, a busbar and an electrical connection post. One end of the electrical connection post is electrically connected to the busbar, and the other end passes through the circuit board and is electrically connected to the circuit board.

[0012] Optionally, first through holes are respectively provided on the circuit board corresponding to the positions of each of the electrical connection posts. One end of the electrical connection post is electrically connected to the busbar, and the other end passes through the corresponding first through hole and is electrically connected to the circuit board.

[0013] Optionally, second welding pads are respectively provided on the circuit board at the edges of each of the first through holes. The other end of each electrical connection post is welded to the corresponding second welding pad.

[0014] Optionally, a part of the busbar is bent and passes through the circuit board to form a connection part. Second through holes are respectively provided on the circuit board corresponding to the positions of each of the connection parts. Third welding pads are respectively provided on the circuit board at the edges of each of the second through holes. Each connection part is welded to the corresponding third welding pad.

[0015] Through the above technical solutions, the present application achieves the effect of optimizing the utilization of the internal space of the battery module. Description of the Drawings

[0016] Figure 1Schematic diagram of the electrical signal connection structure of a battery module in the prior art;

[0017] Figure 2 Schematic diagram of the electrical signal connection structure of the battery module according to the first embodiment of the present application;

[0018] Figure 3 For Figure 2 Exploded view of the electrical signal connection structure shown;

[0019] Figure 4 Schematic diagram of the electrical signal connection structure of the battery module according to the second embodiment of the present application;

[0020] Figure 5 For Figure 4 Exploded view of the electrical signal connection structure shown;

[0021] Figure 6 Schematic diagram of the bus bar of the electrical signal connection structure of the battery module electrically connecting to the circuit board;

[0022] Figure 7 Schematic diagram of the bus bar of the electrical signal connection structure of the battery module electrically connecting to the circuit board via the electrical connection column.

[0023] Explanation of reference numerals: 100 - battery module; 110 - metal bus bar; 120 - flexible printed circuit board; 130 - nickel sheet; 140 - circuit board; 200 - electrical signal connection structure of the battery module; 210 - battery cell group; 220 - circuit board; 222 - first welding pad; 230, 230' - bus bar; 232 - welding part; 234 - connecting part; 240 - electrical connection piece; 250 - electrical connection column; 1A - first through hole; 1B - second through hole. Detailed implementation manners

[0024] The following describes the present application based on embodiments, but the present application is not limited to these embodiments. In the following detailed description of the present application, some specific detailed parts are described in detail. Those of ordinary skill in the art can fully understand the present application without the description of these detailed parts. In order to avoid obscuring the essence of the present application, well-known methods, processes, procedures, components, and circuits are not described in detail. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0025] As Figure 2 And Figure 3As shown, the electrical signal connection structure 200 of the first embodiment of the present application includes: at least one battery cell group 210; at least one circuit board 220, the circuit board 220 includes a battery management system; a bus bar 230 electrically connected to the at least one battery cell group 210; and at least one electrical connection piece 240, one end of the electrical connection piece 240 is electrically connected to the bus bar 230, and the other end is electrically connected to the circuit board 220 after being bent.

[0026] In this embodiment, the electrical connection piece 240 can be made of a material with good electrical conductivity and elastic deformation ability (such as copper or nickel) to absorb the vibration between the bus bar 230 and the circuit board 220. This structure not only enhances the stability of the electrical connection but also improves the reliability of the battery module in a vibrating environment. To further optimize space utilization, a plurality of first welding pads 222 are provided at the edge of the circuit board 220, and welding parts 232 are provided at the positions of the bus bar 230 corresponding to each of the first welding pads 222. Each electrical connection piece 240 is a C-shaped metal piece, one end of which is welded to the first welding pad 222, and the other end is welded to the corresponding welding part 232. This structure effectively reduces the space occupied inside the battery module.

[0027] As Figure 4 and Figure 5 As shown, the electrical signal connection structure 200 of the second embodiment of the present application includes: at least one battery cell group 210; at least one circuit board 220, the circuit board 220 includes a battery management system; a bus bar 230 electrically connected to the at least one battery cell group 210; and at least one electrical connection column 250, one end of the electrical connection column 250 is electrically connected to the bus bar 230, and the other end passes through the circuit board 220 and is electrically connected to the circuit board 220.

[0028] As Figure 6 As shown, further, the electrical connection column 250 of the second embodiment can be made of a material with good electrical conductivity and mechanical strength (such as a tinned copper column). The circuit board 220 is respectively provided with first through holes 1A at positions corresponding to each electrical connection column 250. One end of the electrical connection column 250 is electrically connected to the bus bar 230, and the other end passes through the first through hole 1A and is electrically connected to the circuit board 220. To ensure the firmness and stability of the connection, the circuit board 220 is respectively provided with second welding pads (not shown in the figure) at the edges of each of the first through holes 1A, and the other end of each electrical connection column 250 is welded to the corresponding second welding pad (not shown in the figure). This structure not only improves the reliability of the electrical connection but also increases the mechanical strength of the electrical connection, and is particularly suitable for high-vibration or high-stress environments. Specifically, through the through-welding of the electrical connection column 250, the pins for detecting voltage, current or temperature of the electrical connection column 250 can be directly welded to the second welding pads on the circuit board 220.

[0029] As Figure 7 shown, according to the example of the second embodiment, a third embodiment can also be derived in which the deformed bus bar 230' is directly electrically connected to the circuit board 220. In this embodiment, a part of the bus bar 230' is bent and passes through the circuit board 220 to form a connecting portion 234. The circuit board 220 is respectively provided with second through holes 1B at positions corresponding to each connecting portion 234, and third welding pads (not shown in the figure) are respectively provided at the edges of each second through hole 1B of the circuit board 220. Each connecting portion 234 is welded to the corresponding third welding pad (not shown in the figure). The above structural improvement is achieved by directly connecting the bus bar 230' to the circuit board 220, further reducing the length of the connection path, reducing the resistance, and optimizing the utilization of the internal space at the same time. The bent bus bar 230' can not only adapt to different circuit layout requirements, but also relieve the thermal stress to a certain extent and extend the service life of the battery module. Specifically, through the through-welding of the deformed bus bar 230', the pins for detecting voltage, current or temperature of the deformed bus bar 230' can be directly welded to the third welding pads on the circuit board 220. In addition, according to the actual application requirements, the materials and dimensions of the electrical connection piece 240 and the electrical connection post 250 can be optimized. For example, materials with higher strength are used to enhance the mechanical stability of the connection. In addition, coating treatments (such as gold plating or tin plating) can also be performed on the surfaces of the electrical connection piece 240 and the electrical connection post 250 to improve their antioxidant properties and extend the service life.

[0030] In summary, the electrical signal connection structure 200 of the battery module provided in this application includes, but is not limited to, the structures provided in the first embodiment, the second embodiment, and the third embodiment. Therefore, those of ordinary skill in the art can form the required electrical signal connection structure 200 of the battery module according to actual requirements, space conditions, etc.

[0031] The above are only the preferred embodiments of this application and are not used to limit this application. For those of ordinary skill in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. An electrical signal connection structure of a battery module, characterized in that: include: At least one battery cell group; at least one circuit board, the circuit board comprising a battery management system; A busbar electrically connected to the at least one battery cell group; as well as At least one electrical connection sheet, one end of which is electrically connected to the bus bar, and the other end of which is electrically connected to the circuit board through bending.

2. The electrical signal connection structure of the battery module according to claim 1, characterized in that: At least one first welding pad is provided at the edge of the circuit board, and a welding portion is provided at a position of the bus corresponding to each of the first welding pads. The at least one electrical connecting sheet is a C-shaped metal sheet, and one end of each of the C-shaped metal sheets is welded to one of the at least one welding pads, and the other end of each of the C-shaped metal sheets is welded to the corresponding welding portion.

3. The electrical signal connection structure of the battery module according to claim 1, characterized in that: It also includes at least one electrical connection column, and the circuit board is provided with a first through hole at a position corresponding to each of the electrical connection columns. One end of the electrical connection column is electrically connected to the bus, and the other end passes through the corresponding first through hole and is electrically connected to the circuit board.

4. The electrical signal connection structure of the battery module according to claim 3, characterized in that: The circuit board is provided with a second welding pad at each edge of the first through-hole, and the other end of each of the electrical connection pillars is welded to the corresponding second welding pad.

5. The electrical signal connection structure of the battery module according to claim 1, characterized in that: A portion of the bus is bent and passes through the circuit board to form a connecting portion. The circuit board is provided with a second through hole at a position corresponding to each of the connecting portions. The circuit board is provided with a third welding pad at an edge of each of the second through holes. Each of the connecting portions is welded to the corresponding third welding pad.

6. An electrical signal connection structure of a battery module, characterized in that: include: At least one battery cell group; at least one circuit board, the circuit board comprising a battery management system; A busbar electrically connected to the at least one battery cell group; as well as At least one electrical connection column, one end of which is electrically connected to the bus bar, and the other end of which passes through the circuit board and is electrically connected to the circuit board.

7. The electrical signal connection structure of the battery module according to claim 6, characterized in that: The circuit board is provided with a first through hole at a position corresponding to each of the electrical connection pillars. One end of the electrical connection pillar is electrically connected to the bus bar, and the other end passes through the corresponding first through hole and is electrically connected to the circuit board.

8. The electrical signal connection structure of the battery module according to claim 7, characterized in that: The circuit board is provided with a second welding pad at each edge of the first through-hole, and the other end of each of the electrical connection pillars is welded to the corresponding second welding pad.

9. The electrical signal connection structure of the battery module according to claim 6, characterized in that: A portion of the bus is bent and passes through the circuit board to form a connecting portion. The circuit board is provided with a second through hole at a position corresponding to each of the connecting portions. The circuit board is provided with a third welding pad at an edge of each of the second through holes. Each of the connecting portions is welded to the corresponding third welding pad.

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