Power battery connecting assembly adopting nickel-copper conversion terminal for sampling

Abstract

The utility model discloses a power battery connection assembly adopting a nickel-copper conversion terminal for sampling, which comprises a wire harness isolation plate, an electric connection sheet and a flexible circuit board, the flexible circuit board is provided with the nickel-copper conversion terminal for acquiring voltage signals, and one end of the flexible circuit board is connected with a connector; the nickel-copper conversion terminal is connected with the electric connection sheet through laser welding and samples, and the nickel-copper conversion terminal transmits sampling information to the connector through the flexible circuit board. The nickel-copper conversion terminal is used for replacing a copper foil welding terminal with a complex welding process for sampling, ultrasonic welding is converted into laser welding, the production process is simplified, and the product cost is reduced.

Description

Technical Field

[0001] This utility model relates to a power battery connection assembly, and more particularly to a power battery connection assembly that uses a nickel-copper adapter terminal for sampling. Background Technology

[0002] Currently, voltage sampling methods for electrical connection components are diversifying, with common methods including nickel sheet laser welding sampling, copper foil terminal ultrasonic welding sampling, and wire ultrasonic welding sampling. Among these, copper foil terminals can simplify the manufacturing process of flexible circuit boards and reduce costs, making them a preferred solution for energy-saving and cost-reducing voltage sampling of electrical connection components. However, the manufacturing process for welding copper foil terminals to connecting pieces involves ultrasonic welding, which is complex and requires full inspection and confirmation using AVI equipment after production, significantly impacting production efficiency. Utility Model Content

[0003] To address the shortcomings of the aforementioned technologies, this utility model provides a power battery connection assembly that uses a nickel-copper adapter terminal for sampling.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is: a power battery connection assembly that uses nickel-copper adapter terminals for sampling, including an electrical connection piece and a flexible circuit board. The flexible circuit board has nickel-copper adapter terminals for collecting voltage signals, and a connector is connected to one end of the flexible circuit board.

[0005] The nickel-copper adapter terminal is connected to the electrical connector and sampled via laser welding, and the sampled information is transmitted to the connector via a flexible circuit board.

[0006] Preferably, the nickel-copper adapter terminal includes an upper PI layer, a nickel sheet, a copper foil layer, and a lower PI layer;

[0007] The upper PI layer is fixed to the nickel sheet and copper foil layer by hot pressing with an adhesive layer, with the nickel sheet located between the upper PI layer and the copper foil layer. The lower PI layer is fixed to the copper foil layer by hot pressing with an adhesive layer.

[0008] Preferably, the upper PI layer is hot-pressed to the four edges of the nickel sheet via an adhesive layer.

[0009] Preferably, the adhesive layer is ADH adhesive.

[0010] Preferably, the solder joint between the nickel-copper adapter terminal and the electrical connector penetrates the nickel sheet and the copper foil layer.

[0011] Preferably, the power battery connection assembly also includes a wire harness isolation plate;

[0012] The electrical connectors and flexible circuit boards are both fixed to the wire harness isolation plate.

[0013] Preferably, the electrical connector is fixed to the wire harness isolation plate by hot riveting.

[0014] Preferably, the flexible circuit board has positioning holes and the wire harness isolation plate has positioning posts;

[0015] The flexible circuit board is fitted onto the positioning post through positioning holes and fixed to the wire harness isolation plate with double-sided adhesive.

[0016] This utility model discloses a power battery connection assembly that uses a nickel-copper adapter terminal for sampling. The nickel-copper adapter terminal replaces the copper foil welding terminal with a complex welding process for sampling, realizing the conversion of ultrasonic welding to laser welding, which has the advantages of simplifying the production process and reducing product costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 for Figure 1 Exploded view of the structure of the nickel-copper adapter terminal.

[0019] In the diagram: 1. Wire harness isolation plate; 2. Electrical connector; 3. Flexible circuit board; 4. Nickel-copper adapter terminal; 4-1. Upper PI layer; 4-2. Nickel sheet; 4-3. Copper foil layer; 4-4. Lower PI layer. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] This utility model discloses a power battery connection assembly that uses a nickel-copper adapter terminal for sampling, and the overall structure is set as follows: Figure 1 As shown, it includes a wire harness isolation plate 1, an electrical connection piece 2, a flexible circuit board 3, and a nickel-copper adapter terminal 4 on the flexible circuit board 3 for collecting voltage signals.

[0022] The wire harness isolation plate 1 is a vacuum-formed component, serving as insulation, structural support, and protection for the electrical connector 2 and the flexible circuit board 3. Specifically: the electrical connector 2 is riveted to the wire harness isolation plate 1 using hot-dip rivets; the flexible circuit board 3 has positioning holes, and correspondingly, the wire harness isolation plate 1 has positioning posts; the positioning posts are fitted with the positioning holes, and the flexible circuit board 3 is sleeved onto the positioning posts through the positioning holes to achieve pre-positioning and fixation, and then the flexible circuit board 3 is adhered to the wire harness isolation plate 1 on the back using double-sided adhesive.

[0023] The nickel-copper adapter terminal 4 is a structure on the flexible circuit board 3. It is connected to the electrical connector 2 via laser welding for voltage signal sampling. The collected information is then transmitted via a circuit on the flexible circuit board 3 to a connector 5 connected to one end of the board. The device connected to connector 5 receives the sampled information. This achieves battery voltage sampling using a nickel-copper adapter terminal instead of the traditional copper foil soldered terminal, simplifying the manufacturing process and reducing product costs.

[0024] Furthermore, the specific structural configuration of the nickel-copper adapter terminal 4 is as follows: Figure 2 As shown, it includes a multi-layer structure: an upper PI layer 4-1, a nickel sheet 4-2, a copper foil layer 4-3, and a lower PI layer 4-4;

[0025] The PI layer refers to the polyimide layer, which, as a thin-film insulating material, provides excellent protection. The nickel sheet is 0.2mm thick; the copper foil layer uses 50μm copper foil.

[0026] Based on the structure of the flexible circuit board 3, the copper foil layer 4-3 has a lower PI layer 4-4. The lower PI layer contains an adhesive layer (ADH adhesive). Usually, the lower PI layer 4-4 and the copper foil layer 4-3 are also fixed together by hot pressing the adhesive layer.

[0027] The upper PI layer also contains an adhesive layer (ADH adhesive). The upper PI layer 4-1 is hot-pressed to the four edges of the nickel sheet 4-2 through the ADH adhesive. At the same time, the upper PI layer 4-1 is hot-pressed to the copper foil layer 4-3 through the ADH adhesive. Accordingly, the nickel sheet 4-2 is located between the upper PI layer 4-1 and the copper foil layer 4-3. Thus, the nickel sheet and copper foil layer after hot pressing are fixed in position by the upper PI layer. The copper foil layer 4-3 carries the lower PI layer 4-4 to form the nickel-copper transition terminal 4.

[0028] The aforementioned nickel-copper adapter terminal is connected to the electrical connector 2 by laser welding. The welding point needs to pass through the nickel sheet and copper foil layer before connecting to the electrical connector 2, thereby ultimately realizing the voltage sampling function.

[0029] In addition, the adhesive used in hot pressing is ADH adhesive, which is a commonly used adhesive for connecting substrates and products such as metal copper foil.

[0030] Therefore, the power battery connection assembly using nickel-copper adapter terminals disclosed in this utility model uses a newly designed nickel-copper adapter terminal to sample the battery power. The nickel-copper adapter terminal and the electrical connection piece are connected by laser welding, eliminating the need for ultrasonic welding. Thus, this new power battery connection assembly has the technical advantages of simplified production process, reduced product production cost, and high production efficiency.

[0031] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A power cell connection assembly with a nickel-copper adapter terminal sampling, comprising an electrical connection tab (2) and a flexible circuit board (3), characterized in that: The flexible circuit board (3) has a nickel-copper adapter terminal (4) for collecting voltage signals, and a connector (5) is connected to one end of the flexible circuit board (3); The nickel-copper adapter terminal (4) is connected and sampled by laser welding with the electric connecting sheet (2), and the nickel-copper adapter terminal (4) transmits the sampling information to the connector (5) through the flexible circuit board (3).

2. The power cell connection assembly employing a nickel-copper adapter terminal for sampling, as claimed in claim 1, wherein: The nickel-copper adapter terminal (4) comprises an upper PI layer (4-1), a nickel sheet (4-2), a copper foil layer (4-3), and a lower PI layer (4-4). The upper PI layer (4-1) is fixed by hot pressing with the nickel sheet (4-2) and the copper foil layer (4-3) through an adhesive layer, and the nickel sheet (4-2) is located between the upper PI layer (4-1) and the copper foil layer (4-3), and the lower PI layer (4-4) is fixed by hot pressing with the copper foil layer (4-3) through an adhesive layer.

3. The power cell connection assembly employing a nickel-copper adapter terminal for sampling according to claim 2, wherein: The upper PI layer (4-1) is hot-pressed with the nickel sheet (4-2) through an adhesive layer at the four edges.

4. The power cell connection assembly employing a nickel-copper adapter terminal for sampling according to claim 3, wherein: The adhesive layer is ADH glue.

5. The power cell connection assembly employing a nickel-copper adapter terminal for sampling according to claim 3 or 4, characterized in that: The welding point of the nickel-copper adapter terminal (4) and the electric connecting sheet (2) penetrates the nickel sheet (4-2) and the copper foil layer (4-3).

6. The power cell connection assembly employing a nickel-copper adapter terminal for sampling according to claim 5, wherein: The power battery connecting assembly further comprises a wire harness isolation plate (1). The electric connecting sheet (2) and the flexible circuit board (3) are fixed on the wire harness isolation plate (1).

7. The power cell connection assembly employing a nickel-copper adapter terminal for sampling according to claim 6, wherein: The electric connecting sheet (2) is fixed on the wire harness isolation plate (1) by hot riveting.

8. The power cell connection assembly employing a nickel-copper adapter terminal for sampling, as recited in claim 6, wherein: The flexible circuit board (3) is provided with a positioning hole, and the wire harness isolation plate (1) is provided with a positioning column; The flexible circuit board (3) is sleeved on the positioning column through the positioning hole and is fixed on the wire harness isolation plate (1) by double-sided adhesive tape.

Images