Power battery connecting piece adopting flexible flat cable-hot pressing film

Abstract

The utility model discloses a power battery connecting piece adopting a flexible flat cable-hot-pressed film. The power battery connecting piece comprises a single-sided hot-pressed film, a flexible flat cable and a connecting sheet, the flexible flat cable and the connecting piece are sequentially placed on the hot-pressing adhesive face of the single-face hot-pressing film, and all the components are bonded into a whole through hot pressing. An exposed hole is formed in the single-sided hot-pressed film; the flexible flat cable is provided with a plurality of sampling cables, copper foils are exposed at the tail ends of the sampling cables, and the copper foils are located at the openings of the exposed holes, so that subsequent electrical connection is facilitated. According to the utility model, a flexible flat cable-hot-pressed film structure is adopted, so that compared with a flexible circuit board of a traditional power battery connecting piece, the requirements on the manufacturing process and material of the flexible flat cable are lower; compared with an injection molding plate or a plastic uptake plate of a traditional power battery connecting piece, the single-face hot pressing film does not need to be opened, and therefore the production cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to power battery connectors, and more particularly to a power battery connector using a flexible flat cable-thermal-pressed film. Background Technology

[0002] As a component of the new energy field, power battery systems suffer from high costs and poor stability, with connectors being a significant factor affecting both. Currently, traditional power battery connectors primarily utilize flexible printed circuit boards (FPCs), connecting pieces, and injection-molded or vacuum-formed panels. However, these technologies have the following significant drawbacks:

[0003] High cost: Flexible printed circuit boards (FPCs) have high requirements for material properties and manufacturing processes, resulting in high production costs; the production of injection molded / vacuum-formed boards depends on molds, and the mold production cycle is long and the manufacturing cost is high.

[0004] Poor electrical connection stability: Most of the copper foil in the sampling cable of flexible circuit board (FPC) uses surface mount technology to transfer the nickel sheet and the connecting piece for electrical connection. This connection method has the risk of connection failure due to poor process, which will affect the stability of the electrical connection. Some use direct ultrasonic welding of copper foil to electrical connecting piece. Although it can ensure the stability of electrical connection, the copper foil is not fixed and may be misaligned, causing poor soldering or short circuit, which will affect the stability of the battery. Utility Model Content

[0005] To address the shortcomings of the aforementioned technologies, this utility model provides a power battery connector that employs a flexible flat cable-thermal-pressed film.

[0006] To solve the above technical problems, the technical solution adopted by this utility model is: a power battery connector using a flexible flat cable-hot-pressed film, which includes a single-sided hot-pressed film, a flexible flat cable, and a connecting piece;

[0007] A flexible flat cable and a connecting piece are placed sequentially on the hot-pressing adhesive surface of a single-sided hot-pressing film. The single-sided hot-pressing film, the flexible flat cable, and the connecting piece are bonded together as a whole by hot pressing.

[0008] The single-sided hot-pressed film has multiple exposed holes symmetrically arranged;

[0009] The flexible flat cable includes a sampling cable; copper foil is exposed at the end of the sampling cable.

[0010] The copper foil corresponds one-to-one with the exposed hole, and the copper foil is located above the opening of the exposed hole.

[0011] Furthermore, the sampling cable is a cantilever structure on both sides of a flexible flat cable, which is bent and connected to the main body of the flexible flat cable.

[0012] Furthermore, the sampling cable is perpendicular to the flexible flat cable.

[0013] Furthermore, connecting tabs are positioned above the flexible sampling cables. Each connecting tab is covered with a sampling cable and its copper foil tip.

[0014] Furthermore, the connecting piece and the sampling cable are bonded together with a single-sided hot-press film, thus fixing the copper foil to the exposed hole.

[0015] Furthermore, the connecting piece contacts and is soldered to the copper foil at the exposed hole.

[0016] Furthermore, the single-sided hot-pressed film is also provided with multiple through holes. The connecting piece is provided with holes that match the through holes of the single-sided hot-pressed film.

[0017] Furthermore, the flexible flat cable is also connected to an electrical signal interface.

[0018] This utility model discloses a power battery connector using a flexible flat cable-thermal-pressed film. Its structure uses a flexible flat cable (FFC) instead of a flexible circuit board (FPC) and a single-sided thermoplastic film instead of an injection-molded / vacuum-formed board, which significantly reduces the overall manufacturing cost. At the same time, the exposed holes in the single-sided thermoplastic film are used as welding windows, which facilitates high-precision welding of the connector to the copper foil and effectively improves the stability of its electrical connection.

[0019] Through the above-mentioned technical improvements, this utility model provides a low-cost and highly stable power battery connector solution. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a bottom view of the overall structure of this utility model.

[0022] Figure 3 This is an exploded view of the overall structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of a flexible flat cable.

[0024] Figure 5 This is a schematic diagram of a single-sided hot-pressed film.

[0025] In the diagram: 1. Single-sided hot-pressed film; 2. Flexible flat cable; 3. Connecting piece; 11. Exposed hole; 12. Through hole; 21. Electrical signal interface; 22. Sampling cable; 23. Copper foil. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] This embodiment discloses a power battery connector that combines a flexible flat cable with a heat-pressed film, such as... Figure 3 As shown, it includes a single-sided heat-pressed film 1, a flexible flat cable 2, and a connecting piece 3;

[0028] Among them, such as Figure 5 As shown, the single-sided hot-pressed film 1 serves as the substrate. Specifically, the single-sided hot-pressed film 1 is the main load-bearing structure of this utility model (i.e., the main body of this utility model), which is used to support the flexible flat cable 2 and the connecting piece 3. The single-sided hot-pressed film 1 is provided with exposed holes 11 and through holes 12. The exposed holes 11 serve as welding windows between the copper foil 23 and the connecting piece 3, and the through holes 12 serve as positioning holes for the connecting piece 3.

[0029] like Figure 4 As shown, the flexible flat cable 2 is a conductive material. Specifically, the flexible flat cable 2 serves as the data cable of this invention, used for collecting and transmitting data signals such as voltage. The flexible flat cable 2 includes a sampling cable 22 and a copper foil 23 at the end of the sampling cable 22 for voltage sampling; the flexible flat cable 2 also includes an electrical signal interface 21 for transmitting data signals such as voltage.

[0030] Connector 3 serves as an electrical connection structure component, used for series or parallel connection between individual cells.

[0031] The specific implementation method of this utility model is as follows:

[0032] like Figure 1 and Figure 2 As shown, the flexible flat cable 2 is laid flat on the hot-press adhesive surface of the single-sided hot-press film 1. Specifically, one side of the single-sided hot-press film 1 is treated to form an adhesive layer (i.e., the hot-press adhesive surface) that can be melted through the hot-pressing process. The main body of the flexible flat cable covers the central area of ​​the film, and the sampling cables 22 extending from both sides are cantilever structures, formed by precise bending, and are perpendicular to the main body of the sampling cables 22. The insulation layer at the end of the sampling cables 22 is stripped to expose the copper foil 23 inside. The positions of these copper foils 23 correspond one-to-one with the pre-set exposed holes 11 on the single-sided hot-press film 1, which facilitates the subsequent high-precision welding operation between the connecting piece 3 and the copper foil 23 to ensure the stability of the electrical connection.

[0033] The connecting piece 3 is placed above the sampling cable 22. The connecting piece 3 is provided with holes corresponding to the preset through holes 12 of the single-sided hot-press film 1. The positions of the two holes are matched to achieve precise installation of the connecting piece 3. At this time, each connecting piece 3 should cover a sampling cable 22 and the copper foil 23 at its end.

[0034] The entire structure is bonded together using hot pressing. Specifically, the pre-positioned single-sided hot-press film 1, flexible flat cable 2, and connecting piece 3 are assembled using a hot-pressing device. The hot-pressing device applies heat to melt the adhesive layer of the single-sided hot-press film 1, which then penetrates to the interface between the flexible flat cable 2 and the connecting piece 3, ultimately forming an integrated structure. Since the copper foil is fixed to the exposed hole 11 by the adhesive layer, the copper foil 23 and the connecting piece 3 can be directly welded through the exposed hole 11, achieving a high-precision connection without the need for additional positioning devices, thereby ensuring the stability of the electrical connection of the device.

[0035] Compared with traditional technologies, the core advantages of this implementation lie in its simplified structure and integrated functions. First, the flattened design of the flexible flat cable 2 significantly reduces material usage. Simultaneously, the sampling cable 22 formed by its bending can directly extend to the connecting piece 3 area, eliminating the need for additional wires or adapters in traditional solutions. Therefore, this connector has the advantages of fewer parts, simpler structure, and easier manufacturing and assembly. Second, the thermosetting adhesive on the single-sided hot-press film 1 has excellent adhesion strength to multiple substrates, ensuring tight connections between components and resulting in high overall structural strength. Furthermore, the adhesive bonding between the sampling cable 22 and the connector 3 further restricts the movement of the copper foil 23. The single-sided hot-press film 1 also has pre-set exposed holes 11 for welding the copper foil 23, improving welding quality. In terms of electrical performance, the copper foil 23 and the connecting piece 3 maintain stable electrical connections through high-precision welding. Moreover, the flexibility of the hot-press film allows the entire connector to adapt to a certain degree of bending or torsion during installation, avoiding stress concentration problems that may occur in complex layouts with rigid structures.

[0036] In summary, the specific embodiments of this utility model successfully solve the defects of high cost and poor electrical connection stability of traditional power battery connectors through innovative structural design and process integration. Its core structure lies in the pre-set exposed holes on a single-sided hot-pressed film, facilitating the positioning of the copper foil and achieving high-precision welding between it and the connecting piece, ensuring the stability of the electrical connection. Its core value lies in the deep integration of the electrical performance advantages of flexible flat cables with the adhesive function of the hot-pressed film, simplifying the production process and improving product adaptability. This technical solution is not only applicable to power battery systems for new energy vehicles but can also be extended to fields such as energy storage devices, providing an efficient solution for high-precision, high-stability electrical connection requirements.

[0037] 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 connector employing a flexible flat cable-thermally compressed film, characterized by: Including single-sided hot-pressed film (1), flexible flat cable (2) and connecting sheet (3); The single-sided hot-pressed film (1), flexible flat cable (2) and connecting sheet (3) are integrated by hot-pressing adhesion; The single-sided hot-pressed film (1) is provided with a plurality of exposed holes (11); The flexible flat cable (2) includes a sampling cable (22), and the sampling cable (22) is exposed with a copper foil (23) at a distal end; The copper foil (23) corresponds to the exposed hole (11) one by one, and the copper foil (23) is located above the opening of the exposed hole (11).

2. The power cell connection employing a flexible flat cable-thermally compressed film of claim 1, wherein: The sampling cable (22) is a cantilever structure on both sides of the flexible flat cable (2) and is connected to the main body of the flexible flat cable (2) in a bending manner.

3. The power cell connection employing a flexible flat cable-thermally compressed film of claim 2, wherein: The sampling cable (22) is perpendicular to the flexible flat cable (2).

4. The power cell connection employing a flexible flat cable-thermally compressed film of claim 1, wherein: The connecting sheet (3) is arranged above the flexible flat cable (2), each connecting sheet (3) covers a sampling cable (22) and a copper foil (23) at a distal end of the sampling cable (22).

5. The power cell connection employing a flexible flat cable-thermally compressed film of claim 4, wherein: The connecting sheet (3) and the sampling cable (22) are adhered by the single-sided hot-pressed film (1), so that the copper foil (23) is fixed at the exposed hole (11).

6. The power cell connection employing a flexible flat cable-thermally compressed film of claim 5, wherein: The connecting sheet (3) and the copper foil (23) are in contact and welded at the exposed hole (11).

7. The power cell connection employing a flexible flat cable-thermally compressed film of claim 1, wherein: The single-sided hot-pressed film (1) is also provided with a plurality of through holes (12); The connecting sheet (3) is provided with a hole site matched with the through hole (12) of the single-sided hot-pressed film (1).

8. The power cell connection employing a flexible flat cable-thermally compressed film of claim 1, wherein: The flexible flat cable (2) is connected with a telecommunication signal interface (21).

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