Anti-overlapping conductive bus connection pole piece and CCS integrated busbar

Abstract

The invention belongs to the technical field of battery module manufacturing, and particularly relates to an anti-overlapping conductive bus connection pole piece and a CCS integrated busbar. The anti-overlapping conductive bus connecting pole piece comprises a pole piece main body and a boss structure arranged in the middle of the pole piece, the boss structure comprises a convex plane (upper end face) parallel to the plane of the pole piece main body, and the convex plane is connected with the pole piece main body (lower end face) on the two sides to form a cambered trapezoid boss. The CCS integrated busbar comprises a supporting part, a circuit assembly and the conductive confluence connecting pole piece. By improving the shape of the boss in the middle of the conductive bus connection pole piece, compared with an existing semicircular boss structure, tight overlapping of the two pole pieces can be effectively avoided, so that undesirable phenomena are effectively prevented, and the production efficiency and the product reliability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery module manufacturing, and particularly relates to an anti-overlapping conductive current collecting connecting pole piece and a CCS integrated bus bar. Background Art

[0002] An integrated collecting bus bar (CCS) is a highly integrated battery signal collection (such as temperature collection, pressure collection, etc.) and management system. Existing CCSs mainly consist of a support component, a circuit component, and a conductive current collecting connecting pole piece. Among them, the stable connection between the conductive current collecting connecting pole piece and the battery cell is the key to the stability and reliability of battery signal collection.

[0003] During the production process of the battery module, the conductive current collecting connecting pole pieces of the CCS integrated bus bar are usually placed manually or by a mechanical suction cup gripper. Normally, one position corresponds to one connecting pole piece. However, due to the structural characteristics of the connecting pole piece (such as being thin, light, having a smooth and flat surface, etc.), multiple connecting pole pieces are likely to be closely overlapped or repeatedly placed and overlapped during the placement operation, and it is difficult to identify them (the overlapping structure is relatively flat and stable, and the gap is small). This overlapping phenomenon may cause the entire CCS to be scrapped (such as delamination of the overlapping pole piece after welding with the battery cell), and even flow into the client, causing module failure.

[0004] In addition, in practical applications, in order to buffer the stress deformation caused by the thermal expansion of the battery cell, etc., a certain boss structure is usually provided in the middle part of the conductive current collecting connecting pole piece to enhance the stability of the pole piece connection. The middle boss of the existing connecting pole piece is usually designed as a semi-circular structure, and this design enables two connecting pole pieces to be closely overlapped (as Figure 1 shown), and it is impossible to effectively prevent the occurrence of bad phenomena and misoperations. Therefore, a new structural design is urgently needed to solve this problem. Summary of the Invention

[0005] Aiming at the above-mentioned shortcomings and deficiencies of the prior art, the primary object of the present invention is to provide an anti-overlapping conductive current collecting connecting pole piece.

[0006] Another object of the present invention is to provide a CCS integrated bus bar containing the above-mentioned conductive current collecting connecting pole piece.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] An anti-overlapping conductive current collecting connecting pole piece, comprising a pole piece body and a boss structure arranged in the middle of the pole piece. The boss structure includes a raised plane parallel to the plane of the pole piece body, and the raised plane is connected to the pole piece body on both sides to form an arc trapezoidal boss.

[0009] Further, the convex plane is connected to the pole piece bodies on both sides through reverse arc surfaces, wherein the center of the arc surface connected to the convex plane faces the inside of the boss, and the center of the arc surface connected to the pole piece bodies on both sides faces the outside of the boss.

[0010] Further, the width a of the upper end surface (convex plane) of the arc-surface trapezoidal boss is 5 - 15 mm, the width b of the lower end surface (the distance between the pole piece bodies on both sides) is 15 - 25 mm, and a < b.

[0011] Further, the inclination angle θ (the inclination angle between the upper end surface and the lower end surface) of the arc-surface trapezoidal boss is 30 - 60°. If the inclination angle is too large, the anti-overlap effect will become worse. If the inclination angle is too small, the force on the boss structure will be uneven, resulting in a worse buffering effect.

[0012] Further, the height h of the arc-surface trapezoidal boss is 4 - 8 mm.

[0013] Further, the thickness L of the pole piece body and the boss structure is 1.5 - 4 mm.

[0014] Further preferably, a + 2L < b.

[0015] Through the above structural settings, the overlap between the pole pieces becomes unstable or the unevenness increases, making it easier to detect, thereby preventing misoperations; at the same time, the boss structure can receive more uniform deformation stress from the pole piece bodies on both sides, thereby improving the stress buffering effect and the stability of the pole pieces during application.

[0016] Further, the conductive busbar connecting pole piece is an aluminum pole piece or a copper pole piece.

[0017] Further, the conductive busbar connecting pole piece is formed in one step by a stamping process.

[0018] A CCS integrated busbar containing the above conductive busbar connecting pole piece includes a support component, a circuit component, and the above conductive busbar connecting pole piece.

[0019] Further, the support component includes a plastic suction part, a hot pressing adhesive film, etc.; the circuit component includes a wire harness, FPC, FFC, FDC, FCC, etc.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] (1) By improving the shape of the middle boss of the conductive busbar connecting pole piece, compared with the existing semi-circular boss structure, the present invention can effectively avoid the tight overlap of two pole pieces, thereby effectively preventing the occurrence of bad phenomena and improving production efficiency and product reliability.

[0022] (2) By further precisely calculating the shape parameters of the boss, the instability or unevenness of the overlap between the pole pieces is increased, making it easier to detect, thereby preventing misoperations; at the same time, it does not affect the normal functions of the pole pieces and can further improve the stress buffering effect and the stability of the pole pieces.

[0023] (3) The connecting pole piece of the present invention can be formed in one step by a stamping process, without additional processing steps, with low production costs and easy for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic diagram of the overlapping structure of a conductive busbar connecting pole piece with a traditional semi-circular boss structure.

[0025] Figure 2 and Figure 3 FIG. is a schematic diagram of the structure of a conductive busbar connecting pole piece with an arc-shaped trapezoidal boss structure according to the present invention.

[0026] Figure 4 FIG. is a schematic diagram of the overlapping structure of a conductive busbar connecting pole piece with an arc-shaped trapezoidal boss structure according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present invention will be further described in detail below in conjunction with the embodiments and the drawings, but the embodiments of the present invention are not limited thereto.

[0028] Embodiment 1

[0029] A conductive busbar aluminum pole piece for preventing overlap, the schematic diagram of its structure is as shown in Figure 2 and 3 shown. It includes a pole piece body 1 and a boss structure 2 arranged in the middle of the pole piece. The boss structure includes a raised plane 2-1 parallel to the plane of the pole piece body. The raised plane is connected to the pole piece bodies on both sides to form an arc-shaped trapezoidal boss. The raised plane is connected to the pole piece bodies on both sides through reverse arc surfaces. Among them, the center of the arc surface 2-2 connected to the raised plane faces the inside of the boss, and the center of the arc surface 2-3 connected to the pole piece bodies on both sides faces the outside of the boss.

[0030] According to actual use requirements, the width a of the upper end surface (raised plane) of the arc-shaped trapezoidal boss can be designed to be 5-15 mm, and the width b of the lower end surface (the distance between the pole piece bodies on both sides) can be designed to be 15-25 mm. The inclination angle θ (the inclination angle between the upper end surface and the lower end surface) of the arc-shaped trapezoidal boss can be designed to be 30-60°. The inclination angle θ is optimized so that the two aluminum pole pieces cannot completely overlap when they come into contact. The specific angle can be adjusted within the limited range according to actual production requirements.

[0031] According to the actual usage requirements, the height h of the arc trapezoidal boss can be designed to be 4 - 8 mm. The thickness L of the pole piece body and the boss structure can be designed to be 1.5 - 4 mm.

[0032] More preferably, the width a of the upper end face (raised plane), the thickness L of the pole piece body and the boss structure, and the width b of the lower end face (the distance between the two pole piece bodies on both sides) satisfy the following relationship: a + 2L < b. For example, when a is designed to be 5 mm and L is designed to be 1.5 mm, b can be designed to be any width from 15 to 25 mm; when a is designed to be 10 mm and L is designed to be 3 mm, b can be designed to be any width from 16 to 25 mm (excluding 16 mm); when a is designed to be 15 mm and L is designed to be 4 mm, b can be designed to be any width from 23 to 25 mm (excluding 23 mm). When the above relationship is satisfied, by adjusting the height h of the arc trapezoidal boss, the inclination angle θ of the arc trapezoidal boss is further made to satisfy the condition of 30 - 60°.

[0033] A conductive current - collecting aluminum pole piece for preventing overlap in this embodiment is obtained by one - step forming through a stamping process. The pole piece body 1 and the boss structure 2 of the conductive current - collecting aluminum pole piece form a uniform and continuous whole.

[0034] Through the above structural settings, two aluminum pole pieces cannot completely overlap with each other. The schematic diagram of the overlapping structure is as Figure 4 shown, which can make the overlap between the pole pieces unstable or increase the unevenness, making it easier to detect, thereby preventing the occurrence of misoperations and effectively avoiding the bad problems caused by overlap; at the same time, it can make the boss structure receive more uniform deformation stress from the two pole piece bodies on both sides, thereby improving the stress buffering effect and the stability of the pole piece.

[0035] Embodiment 2

[0036] A conductive current - collecting copper pole piece for preventing overlap in this embodiment has the same structure as that in Embodiment 1.

[0037] A conductive current - collecting copper pole piece for preventing overlap in this embodiment is obtained by one - step forming through a stamping process. The pole piece body 1 and the boss structure 2 of the conductive current - collecting copper pole piece form a uniform and continuous whole.

[0038] Embodiment 3

[0039] A CCS integrated bus bar includes a support component, a circuit component, and a conductive current - collecting connection pole piece. The conductive current - collecting connection pole piece adopts the conductive current - collecting aluminum pole piece of Embodiment 1 or the conductive current - collecting copper pole piece of Embodiment 2. The support component can adopt a plastic suction part or a hot - pressing adhesive film; the circuit component can adopt a wire harness, FPC, FFC, FDC, or FCC.

[0040] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. An anti-overlap conductive busbar connecting electrode, characterized in that: It includes a pole piece body and a boss structure arranged in the middle of the pole piece, wherein the boss structure includes a raised plane parallel to the plane of the pole piece body, and the raised plane is connected with the pole piece bodies on both sides to form an arc-surface trapezoidal boss.

2. The anti-overlapping conductive busbar connection electrode according to claim 1, characterized in that: The raised plane is connected to the pole piece bodies on both sides through reverse arc surfaces, wherein the center of the arc surface connected to the raised plane faces the inside of the boss, and the center of the arc surface connected to the pole piece bodies on both sides faces the outside of the boss.

3. An anti-overlapping conductive busbar connection electrode according to claim 1 or 2, characterized in that: The upper end surface width a of the arc-surface trapezoidal boss is 5 to 15 mm, the lower end surface width b is 15 to 25 mm, and a <b。 4. The anti-overlapping conductive busbar connection electrode according to claim 3, characterized in that: The inclination angle θ of the arc-surface trapezoidal boss is 30° to 60°.

5. The anti-overlapping conductive busbar connection electrode according to claim 4, characterized in that: The height h of the arc-surface trapezoidal boss is 4 to 8 mm; the thickness L of the pole piece body and the boss structure is 1.5 to 4 mm.

6. The anti-overlapping conductive busbar connection electrode according to claim 5, characterized in that: Said a+2L<b.

7. The anti-overlapping conductive busbar connection electrode according to claim 1, characterized in that: The conductive busbar connecting electrode is an aluminum electrode or a copper electrode.

8. The anti-overlapping conductive busbar connection electrode according to claim 1, characterized in that: The conductive busbar connecting electrode is formed in one step by a stamping process.

9. A CCS integrated busbar, characterized in that: It comprises a supporting component, a circuit assembly and a conductive busbar connecting electrode as claimed in any one of claims 1 to 8.

10. A CCS integrated busbar according to claim 9, characterized in that: The supporting components include blister parts and hot-pressed adhesive films; the circuit components include wiring harnesses, FPC, FFC, FDC and FCC.

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