Flexible circuit board assembly convenient to repair and battery module

Abstract

A flexible circuit board assembly convenient to repair comprises a flexible circuit board, a connector and a conductive sheet, the connector is electrically connected to the flexible circuit board, the conductive sheet comprises a first connecting sheet, an avoiding sheet and a second connecting sheet which are connected in sequence, the first connecting sheet is electrically connected to the flexible circuit board, and the avoiding sheet is electrically connected to the second connecting sheet. The bottom of the avoiding piece is higher than the bottom of the second connecting piece, the avoiding piece and the second connecting piece are arranged in the length direction of the flexible circuit board, the second connecting piece is used for being welded to a single battery of a battery module, and the multiple conducting pieces are arranged. The utility model also provides a battery module using the flexible circuit board assembly. Compared with the prior art, the flexible circuit board assembly can avoid an original welding position, the original welding position does not need to be polished, a new flexible circuit board assembly can be replaced conveniently, the replacement efficiency can be improved, and in addition, the connection reliability can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flexible circuit boards, and in particular relates to a flexible circuit board assembly that is easy to repair and a battery module using the flexible circuit board assembly. Background Art

[0002] A flexible circuit board assembly generally includes a flexible circuit board, a conductive sheet, and a connector. In order to accurately monitor and manage the battery status, improve battery performance, ensure safe use, and extend the battery life, the battery module will be equipped with a flexible circuit board assembly. The fixing process is specifically to weld the free end of the conductive sheet to the battery.

[0003] During use, the flexible circuit board assembly (FPC) attached to the battery module can become damaged. If this occurs, such as a blown fuse or a torn FPC, the entire FPC assembly must be removed from the battery module and the soldering locations polished to allow for soldering of a new FPC assembly. This is a cumbersome process, and polishing the soldering locations can easily damage the battery module, rendering it useless and increasing battery maintenance costs. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a flexible circuit board assembly that is easy to repair.

[0005] To achieve the above objectives, the present invention discloses a flexible circuit board assembly that is easy to rework, including a flexible circuit board, a connector and a conductive sheet, the connector being electrically connected to the flexible circuit board, the conductive sheet including a first connecting sheet, a avoidance sheet and a second connecting sheet connected in sequence, the first connecting sheet being electrically connected to the flexible circuit board, the bottom of the avoidance sheet being higher than the bottom of the second connecting sheet, and the avoidance sheet and the second connecting sheet being arranged along the length direction of the flexible circuit board, the second connecting sheet being used to be welded to a single battery cell of a battery module, and there are multiple conductive sheets.

[0006] Preferably, the second connecting pieces of the plurality of conductive pieces are located on the same side of the corresponding avoiding pieces.

[0007] Preferably, the height difference between the bottom of the avoidance plate and the second connecting plate is 0.7 mm to 1.5 mm.

[0008] Preferably, the first connecting piece and the second connecting piece are located on the same horizontal plane.

[0009] Further preferably, the avoidance piece is recessed relative to the first connecting piece and the second connecting piece.

[0010] Further preferably, the first connecting piece, the avoidance piece and the second connecting piece are integrally formed.

[0011] Further preferably, the first connecting piece and the avoidance piece, and the avoidance piece and the second connecting piece are connected in an arc shape.

[0012] The utility model also provides a battery module using the flexible circuit board assembly that is easy to repair.

[0013] A battery module adopts the flexible circuit board assembly that is easy to repair as mentioned above.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] A avoidance plate and a second connecting plate are provided at the end of the conductive plate away from the first connecting plate. When the circuit board is damaged and a new one is replaced, the avoidance plate can be located above the original welding position using the circuit board. The flexible circuit board assembly is connected to the single battery of the battery module through the second connecting plate. This eliminates the need to polish the original welding position, facilitates replacement of the new flexible circuit board assembly, and helps improve replacement efficiency.

[0016] Because the bottom of the avoidance sheet is higher than the bottom of the second connecting sheet, it is positioned higher relative to the second connecting sheet. When the avoidance sheet is above the original welding position, it will not or will not be substantially lifted by the original welding position, thereby affecting the connection of the second connecting sheet. This helps to improve the connection reliability of the second connecting sheet. The second connecting sheet is positioned relatively low, allowing it to contact the battery module's single cells, further improving its connection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the flexible circuit board assembly that is easy to repair in Example 1;

[0018] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the conductive sheet;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the conductive sheet;

[0020] Flexible circuit board 1; connector 2; conductive sheet 3; first connecting sheet 31; avoidance sheet 32; second connecting sheet 33. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] Example 1

[0023] A flexible circuit board assembly that is easy to rework, see Figure 1-Figure 3, including a flexible circuit board 1, a connector 2 and a conductive sheet 3. The connector 2 is an existing connector 2, which is electrically connected to the flexible circuit board 1. The conductive sheet 3 in this embodiment is preferably a nickel sheet, which includes a first connecting sheet 31, a avoiding sheet 32 ​​and a second connecting sheet 33 connected in sequence. The first connecting sheet 31 is electrically connected to the flexible circuit board 1. The bottom of the avoiding sheet 32 ​​is higher than the bottom of the second connecting sheet 33. It and the second connecting sheet 33 are arranged along the length direction of the flexible circuit board 1. The second connecting sheet 33 is used to be welded to the single battery of the battery module. There are multiple conductive sheets 3.

[0024] The conductive sheet 3 of the flexible circuit board assembly described above is provided with a relief sheet 32 ​​and a second connection sheet 33 at the end away from the first connection sheet 31. When a damaged circuit board is replaced with a new one, the relief sheet 32 ​​can be positioned above the original soldering position. The flexible circuit board assembly is then connected to the battery module's cells via the second connection sheet 33. This eliminates the need to polish the original soldering position, facilitating replacement of the new flexible circuit board assembly and improving replacement efficiency. Because the bottom of the relief sheet 32 ​​is higher than the bottom of the second connection sheet 33, the relief sheet 32 ​​is positioned higher relative to the second connection sheet 33. When positioned above the original soldering position, the relief sheet 32 ​​is unlikely, or substantially unlikely, to be lifted by the original soldering position, thereby affecting the connection of the second connection sheet 33. This improves the connection reliability of the second connection sheet 33. The second connection sheet 33 is positioned relatively lower, allowing it to contact the battery module's cells, further enhancing connection reliability.

[0025] In this embodiment, the height difference between the avoidance plate 32 and the bottom of the second connecting plate 33 is 0.7mm to 1.5mm, preferably 1mm. This can avoid the bulge generated by the original welding position, and the avoidance plate 32 will not be lifted up by the original welding position to affect the connection of the second connecting plate 33. It can also enable the second connecting plate 33 to fully contact the single battery of the battery module, thereby improving the connection reliability.

[0026] The existing flexible circuit board assembly does not have the second connecting piece 33 as in this embodiment. The welding position between the second connecting piece 33 and the battery module is at the position of the avoidance piece 32 in this embodiment. The avoidance piece 32 is provided to avoid the welding position, and the second connecting piece 33 is provided to be welded to the single battery of the battery module. In order to make the relative positions between all the second connecting pieces 33 consistent with the welding position on the existing flexible circuit board 1 (with the battery module) and improve the applicability of the product, in this embodiment, the second connecting pieces 33 of the multiple conductive sheets 3 are located on the same side of the corresponding avoidance piece 32, such as Figure 1 All the conductive plates 3 shown are located on the side of the corresponding avoidance plate 32 close to the connector 2 .

[0027] In this embodiment, the first connecting piece 31 and the second connecting piece 33 are located on the same horizontal plane. In this way, the relative positions of the position where the conductive piece 3 is connected to the flexible circuit board assembly and the position where the conductive piece is connected to the battery module in the height direction are consistent with the existing flexible circuit board 1. The connection and assembly thereof are consistent with the existing circuit board, and the applicability is strong.

[0028] In this embodiment, the first connecting piece 31 , the avoiding piece 32 and the second connecting piece 33 are integrally formed, which can ensure the strength of the conductive piece 3 and improve the stability and reliability during use.

[0029] In this embodiment, the avoidance piece 32 is recessed relative to the first connecting piece 31 and the second connecting piece 33, thereby forming an avoidance space. The arc connection between the first connecting piece 31 and the avoidance piece 32, as well as between the avoidance piece 32 and the second connecting piece 33, creates an arc-shaped cross-section at the connection location. This ensures the strength of the connection location and prevents breakage during the molding process due to its thin thickness. Furthermore, the arc-shaped connection provides a buffer space for movement between the two connection structures, providing a certain buffering capacity for the conductive piece 3 and improving connection reliability.

[0030] Example 2

[0031] A battery module adopts the flexible circuit board assembly that is easy to repair as in Example 1.

[0032] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A flexible circuit board assembly that is easy to repair, characterized by: It includes a flexible circuit board, a connector and a conductive sheet, the connector is electrically connected to the flexible circuit board, the conductive sheet includes a first connecting sheet, a avoidance sheet and a second connecting sheet connected in sequence, the first connecting sheet is electrically connected to the flexible circuit board, the bottom of the avoidance sheet is higher than the bottom of the second connecting sheet, and it and the second connecting sheet are arranged along the length direction of the flexible circuit board, the second connecting sheet is used to be welded to the single battery of the battery module, and there are multiple conductive sheets.

2. The flexible circuit board assembly that is easy to repair according to claim 1, characterized in that: The second connecting pieces of the plurality of conductive pieces are located on the same side of the corresponding avoiding pieces.

3. The flexible circuit board assembly that is easy to repair according to claim 1, characterized in that: The height difference between the bottom of the avoidance plate and the bottom of the second connecting plate is 0.7 mm to 1.5 mm.

4. The flexible circuit board assembly for easy rework according to claim 1, characterized in that: The first connecting piece and the second connecting piece are located on the same horizontal plane.

5. The flexible circuit board assembly for easy rework according to claim 4, characterized in that: The avoidance piece is recessed relative to the first connecting piece and the second connecting piece.

6. The flexible circuit board assembly for easy rework according to claim 5, characterized in that: The first connecting piece, the avoiding piece and the second connecting piece are integrally formed.

7. The flexible circuit board assembly for easy rework according to claim 6, characterized in that: The first connecting piece and the avoidance piece are connected to each other by circular arcs, as are the avoidance piece and the second connecting piece.

8. A battery module, characterized in that: A flexible circuit board assembly that is easy to repair as claimed in claim 1 is used.

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