Battery pack sampling flexible circuit board buffer structure

Abstract

The utility model discloses a battery pack sampling flexible circuit board buffer structure, which relates to the technical field of flexible circuit board buffer, has the advantages that a flexible circuit board does not need to be bent or a cantilever structure is not needed to relieve stress, and is characterized by comprising a nickel sheet for connecting the flexible circuit board and a sheet, the nickel sheet comprises a first planar sheet and a second planar sheet, wherein the two ends of the first planar sheet and the two ends of the second planar sheet are connected with the flexible circuit board and the sheet respectively, and the first planar sheet and the second planar sheet are connected through a planar buffer connecting sheet.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board buffer technology, specifically a flexible circuit board buffer structure for battery pack sampling. Background Technology

[0002] Because the cells in a power battery expand and deform during operation, the power battery undergoes slight deformation; this causes the contact plates connected to the power battery to shift slightly, which in turn compresses the flexible circuit board, potentially causing the circuit board to break.

[0003] Chinese patent CN220021499U discloses a nickel sheet and a cell assembly structure adapted to cell expansion. The cell assembly structure includes a nickel sheet, which is thin and bent in the middle. The bent part of the nickel sheet has a strip-shaped through hole, which makes it easier for the nickel sheet to deform during cell expansion to relieve the compressive stress on the flexible circuit board. The cell assembly structure also includes an isolation plate, with a switch plate installed at one end of the isolation plate. The switch plate is connected to the power battery and is connected to the flexible circuit board by welding the nickel sheet. One short side of the nickel sheet is welded to the switch plate, and the other short side of the nickel sheet is welded to the flexible circuit board.

[0004] The aforementioned prior art solves the technical problem of eliminating the need to bend flexible circuit boards or use cantilever structures to reduce stress.

[0005] Therefore, the applicant developed another new technical solution in the actual production process to solve the above-mentioned technical problems. Utility Model Content

[0006] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a flexible circuit board buffer structure for battery pack sampling, which has the advantage of eliminating the need for bending the flexible circuit board or using a cantilever structure to reduce stress.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This utility model provides a battery pack sampling flexible circuit board buffer structure, including a nickel sheet connecting the flexible circuit board and the battery pack. The nickel sheet includes a planar sheet one and a planar sheet two, which are respectively connected to the flexible circuit board and the battery pack at both ends. The planar sheet one and the planar sheet two are connected by a planar buffer connecting piece.

[0009] By adopting the above technical solution, a buffer connecting piece is designed on the nickel sheet of the flexible circuit board to replace the original buffer cantilever and the flexible circuit board is bent. When the battery cell expands, a buffer connecting piece is designed on the nickel sheet. This structure deforms to resist the expansion force of the battery cell. At this time, the buffer connecting plate is on the same plane as the first and second planar plates, and can be directly formed by stamping, saving processes.

[0010] Preferably, the buffer connecting piece includes an inclined piece disposed on opposite sides of the first planar piece and the second planar piece. The two inclined pieces are parallel and distributed to each other from left to right. The two inclined pieces are connected by a transition piece. The two inclined pieces are respectively connected to the connecting parts of the first planar piece and the second planar piece by an arc. The two ends of the transition piece are also respectively connected to the ends of the two inclined pieces by an arc.

[0011] Preferably, neither end of the transition piece extends beyond the ends of planar piece one and planar piece two.

[0012] Preferably, the buffer connecting piece includes a horizontal piece connecting the first flat piece and the second flat piece, and the horizontal piece has several rectangular grooves of different sizes spaced at both ends along its length.

[0013] Preferably, the corners of each of the rectangular slots are rounded, and the connection points between the horizontal piece and the first and second planar pieces are also rounded.

[0014] Preferably, the first planar sheet, the second planar sheet, and the buffer connecting sheet are integrated, and each of the first planar sheet, the second planar sheet, and the buffer connecting sheet includes an intermediate layer and a nickel-plated layer covering the outer wall of the intermediate layer, wherein the intermediate layer is a phosphor bronze layer.

[0015] Preferably, both the first and second planar plates are provided with a plurality of staggered holes arranged in a longitudinal and transverse manner.

[0016] The beneficial effects of this utility model are as follows: by designing a buffer connecting piece on the nickel sheet welded to the flexible circuit board to replace the original buffer cantilever and bending the flexible circuit board, a buffer connecting piece is designed on the nickel sheet when the battery cell expands. This structure deforms to resist the expansion force of the battery cell. At this time, the buffer connecting plate is on the same plane as the first and second planar plates, and can be directly formed by stamping, saving process steps. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0018] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0019] Figure 2 This is a schematic diagram illustrating the structure of the tilting plate in this embodiment;

[0020] Figure 3 This is a schematic diagram illustrating the structure of the horizontal strip in this embodiment;

[0021] Figure 4 This is a schematic diagram illustrating the structure of the intermediate layer in this embodiment.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the figure: 1. Flexible circuit board; 11. Flat sheet one; 12. Flat sheet two; 13. Inclined sheet; 131. Transition sheet; 14. Horizontal sheet; 141. Rectangular groove; 15. Intermediate layer; 151. Nickel plating layer; 16. Interlaced hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] A battery pack sampling flexible circuit board buffer structure, such as Figure 1 and Figure 2 The nickel sheet includes a flexible circuit board 1 and a bar sheet. The nickel sheet includes a planar sheet 11 and a planar sheet 2 12, which are respectively connected to the flexible circuit board 1 and the bar sheet. The planar sheet 11 and the planar sheet 2 12 are connected by a planar buffer connecting piece. At this time, the buffer connecting piece is on the same plane as the planar sheet 11 and the planar sheet 2 12.

[0026] like Figure 1 and Figure 2 By designing a buffer connecting piece on the nickel sheet welded to the flexible circuit board 1 to replace the original buffer cantilever and bending the flexible circuit board, a buffer connecting piece is designed on the nickel sheet when the battery cell expands. This structure deforms to resist the expansion force of the battery cell. At this time, the buffer connecting plate, the flat sheet 11 and the flat sheet 12 are all on the same plane, and can be directly formed by stamping, saving processes.

[0027] like Figure 1 and Figure 2The buffer connecting piece includes an inclined piece 13 disposed on the opposite side of the first planar piece 11 and the second planar piece 12. The two inclined pieces 13 are parallel and distributed opposite each other to the left and right. The two inclined pieces 13 are connected by a transition piece 131. The two inclined pieces 13 are respectively connected to the connecting part of the first planar piece 11 and the second planar piece 12 by an arc. The two ends of the transition piece 131 are also respectively connected to the ends of the two inclined pieces 13 by an arc. The ends of the two inclined pieces 13 are respectively distributed close to the ends of the first planar piece 11 and the second planar piece 12.

[0028] like Figure 1 and Figure 2 Neither end of the transition piece 131 extends beyond the ends of the first planar piece 11 and the second planar piece 12. That is, the transition piece 131 can be completely projected onto the first planar piece 11 and the second planar piece 12. The purpose of this design is that the inclined piece 13 and the transition piece 131 form a spring-like elastic component, allowing the first planar piece 11 and the second planar piece 12 to expand and contract when subjected to force.

[0029] like Figure 3 Alternatively, the buffer connecting piece includes a horizontal piece 14 connecting the first planar piece 11 and the second planar piece 12. Both ends of the horizontal piece 14 are provided with a number of rectangular grooves 141 of different sizes at intervals along the length direction of the horizontal piece 14. The rectangular grooves 141 of different sizes make the horizontal piece 14 form cavities of different sizes. The cavities will cut off the original force transmission path. The larger cavities reduce the edge stiffness of the horizontal piece 14, while the smaller cavities maintain support. Therefore, this design can improve the overall deformability while maintaining the necessary strength of the horizontal piece 14.

[0030] like Figure 3 The corners of each rectangular groove 141 are rounded, and the connection between the horizontal piece 14 and the first and second planar pieces 11 and 12 is also rounded to reduce stress concentration and facilitate the deformation of the connecting piece to resist the expansion force of the battery cell.

[0031] like Figure 1 and Figure 4 Planar sheet 11 and planar sheet 12 are integrated with the buffer connecting sheet to form a nickel sheet. Planar sheet 11, planar sheet 12, and the buffer connecting sheet all include an intermediate layer 15 and a nickel-plated layer 151 covering the outer wall of the intermediate layer 15. The intermediate layer 15 is a phosphor bronze layer. In this case, the nickel-plated layer 151 is a layer of nickel plated on the outside of the intermediate layer 15. The phosphor bronze layer is a highly elastic layer, and the outer nickel plating ensures solderability, thus facilitating the soldering of the ends of planar sheet 11 and planar sheet 12 to the flexible circuit board 1 and the connecting sheet, respectively, improving elasticity compared to a pure nickel sheet.

[0032] like Figure 1 and Figure 4Both planar sheet 11 and planar sheet 12 have several staggered holes 16 arranged longitudinally and laterally. The longitudinal and lateral staggers refer to the length or width direction of planar sheet 11 or planar sheet 12. The staggered holes 16 reduce the local stiffness of planar sheet 11 and planar sheet 12 while maintaining the conductive path, which can achieve high elasticity and high reliability of nickel sheet connection in flexible circuit, and meet the long-term use requirements in dynamic environments.

[0033] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A battery pack sampling flexible circuit board buffer structure, comprising a nickel sheet connecting the flexible circuit board (1) and the battery pack, characterized in that, The nickel sheet includes a planar sheet one (11) and a planar sheet two (12) that are respectively connected to the flexible circuit board (1) and the sheet at both ends. The planar sheet one (11) and the planar sheet two (12) are connected by a planar buffer connecting piece.

2. The battery pack sampling flexible circuit board buffer structure as described in claim 1, characterized in that, The buffer connecting piece includes an inclined piece (13) disposed on the opposite side of the first planar piece (11) and the second planar piece (12). The two inclined pieces (13) are parallel and distributed opposite each other to the left and right. The two inclined pieces (13) are connected by a transition piece (131). The two inclined pieces (13) are respectively connected to the connecting part of the first planar piece (11) and the second planar piece (12) with an arc transition. The two ends of the transition piece (131) are also respectively connected to the ends of the two inclined pieces (13) with an arc transition.

3. The battery pack sampling flexible circuit board buffer structure as described in claim 2, characterized in that, Neither end of the transition piece (131) extends beyond the ends of the first planar piece (11) and the second planar piece (12).

4. The battery pack sampling flexible circuit board buffer structure as described in claim 1, characterized in that, The buffer connecting piece includes a horizontal piece (14) connecting the first flat piece (11) and the second flat piece (12). The horizontal piece (14) has several rectangular grooves (141) of different sizes spaced at both ends along its length.

5. The battery pack sampling flexible circuit board buffer structure as described in claim 4, characterized in that, The corners of each of the rectangular slots (141) are rounded, and the connection between the horizontal piece (14) and the first flat piece (11) and the second flat piece (12) is also rounded.

6. A battery pack sampling flexible circuit board buffer structure as described in claim 1, 2, or 4, characterized in that, The planar sheet one (11) and planar sheet two (12) and the buffer connecting sheet are integrated. The planar sheet one (11) and planar sheet two (12) and the buffer connecting sheet all include an intermediate layer (15) and a nickel plating layer (151) covering the outer wall of the intermediate layer (15). The intermediate layer (15) is a phosphor bronze layer.

7. The battery pack sampling flexible circuit board buffer structure as described in claim 6, characterized in that, Both the first planar plate (11) and the second planar plate (12) are provided with a number of staggered holes (16) arranged in a longitudinal and transverse manner.

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