Vehicle polyimide insulating layer flexible flat wire rod battery cell connecting assembly

Abstract

The utility model discloses a vehicle polyimide insulating layer flexible flat wire rod battery core connecting assembly which comprises a plastic uptake isolation plate and a base plate which is located on the bottom layer and plays a supporting and fixing role. The aluminum bar group is mounted on the blister isolation plate to realize electric connection between the battery cells; the flexible flat wire assembly comprises a first flexible circuit board, an NTC reinforcing plate, an NTC support and a temperature sensor. The first flexible circuit board is installed on the blister isolation board, the first flexible circuit board is connected with the second flexible circuit board, the second flexible circuit board is connected with the temperature sensor, the temperature sensor is installed on the blister isolation board through the NTC support, and the NTC reinforcing board is attached to the second flexible circuit board; and the heat conduction pad is connected between the battery cell and the temperature sensor and is used for transferring heat of the battery cell to the temperature sensor. According to the utility model, the weight reduction and the cost reduction of the CCS assembly are realized, and effective technical support is provided for the light weight, the cost saving and the reliability improvement of the new energy power battery module.

Description

Technical Field

[0001] The utility model relates to a cell connection component, in particular to a flexible flat wire cell connection component with a polyimide insulating layer for vehicles. Background Art

[0002] In the power battery module of new energy vehicles, the CCS (Cell Connector Structure) component plays an important role. Nowadays, with the rapid development of new energy vehicles, the requirements for the weight and cost of automotive components are becoming more and more stringent. The traditional CCS component uses an FPC double-sided board component, which has the disadvantages of high price, complex process and long development cycle. Therefore, there is an urgent need for a flexible flat wire cell connection component with a polyimide insulating layer for vehicles to solve the problems of high cost, complex process and long development cycle of the traditional flexible printed circuit board (FPC) double-sided board component. Content of the Utility Model

[0003] In order to solve the deficiencies of the above technologies, the utility model provides a flexible flat wire cell connection component with a polyimide insulating layer for vehicles.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is a flexible flat wire cell connection component with a polyimide insulating layer for vehicles, including:

[0005] A plastic suction isolation board, located at the bottom layer as a substrate for support and fixation;

[0006] An aluminum bar group, installed on the plastic suction isolation board to realize electrical connection between cells;

[0007] A flexible flat wire component, including a flexible circuit board I, an NTC reinforcement board, an NTC bracket and a temperature sensor; the flexible circuit board I is installed on the plastic suction isolation board, the flexible circuit board I is connected to the flexible circuit board II, the flexible circuit board II is connected to the temperature sensor, the temperature sensor is installed on the plastic suction isolation board through the NTC bracket, and the NTC reinforcement board is attached to the flexible circuit board II;

[0008] A heat conduction pad, connected between the cell and the temperature sensor to transfer the heat of the cell to the temperature sensor.

[0009] Further, the aluminum bar group includes a connecting piece aluminum bar, a cross-connecting aluminum bar and an output-stage aluminum bar.

[0010] Further, the NTC reinforcement board is attached above or on the side of the temperature sensor to fix the temperature sensor and protect it from mechanical damage.

[0011] Further, rivet posts are provided on the plastic suction isolation board, and the aluminum bar group is fixed through the rivet posts.

[0012] Furthermore, the distance from the top of the riveting post to the heat-riveted surface is less than 1.5 mm.

[0013] Furthermore, the top of the riveting post is a dome-shaped protrusion larger than the diameter of the post body of the riveting post.

[0014] The utility model discloses a flexible flat wire core connection component for a vehicle with a polyimide insulating layer. The application of this solution brings a series of advantages, including reduction in material usage, simplification of manufacturing processes, reduction in manufacturing difficulty, and reduction in mold costs. With the rapid development of the new energy vehicle industry, higher requirements are put forward for the weight and cost control of automotive components. The application of this new structure not only achieves weight reduction and cost reduction of the CCS component, but also provides effective technical support for the lightweighting, cost saving, and reliability improvement of new energy power battery modules. This solution plays a key role in the sustainable development of the new energy vehicle industry. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 is a cross-sectional view of the position where the flexible flat wire component of the utility model is located.

[0017] Figure 3 is a schematic diagram of the structure at the heat-riveting position of the utility model.

[0018] In the figure: 1, blister isolation board; 2, aluminum bar group; 3, flexible flat wire component; 4, heat-conducting pad; 5, riveting post; 21, connecting piece aluminum bar; 22, cross-connecting aluminum bar; 23, output-stage aluminum bar; 31, flexible circuit board one; 32, NTC reinforcement board; 33, NTC bracket; 34, temperature sensor; 35, flexible circuit board two; 51, dome-shaped protrusion. Detailed Embodiments

[0019] The following further elaborates on the utility model in detail with reference to the drawings and specific embodiments.

[0020] As Figures 1-3 shown in the flexible flat wire core connection component for a vehicle with a polyimide insulating layer, it is characterized by comprising:

[0021] A blister isolation board 1, located at the bottom layer as a substrate for support and fixation;

[0022] The aluminum bar group 2 is installed on the plastic suction isolation board 1 to achieve electrical connection between the battery cells; the aluminum bar group 2 includes connecting piece aluminum bars 21, cross-connecting aluminum bars 22, and output-stage aluminum bars 23. The connecting piece aluminum bars 21 are used to connect the aluminum sheet parts of adjacent battery cells, the cross-connecting aluminum bars 22 are used to span multiple battery cells, and the output-stage aluminum bars 23 are aluminum sheet parts used to lead out the power output signal from the battery cell module, located at the end of the aluminum bar group 2, and transmit electrical energy to the battery management system (BMS) or other devices using the energy of the battery cells. Generally speaking, the above three essentially constitute the aluminum bar group 2 as aluminum bar sheets together, and they are respectively responsible for achieving electrical connection between battery cells, between battery cells and battery cell groups, and between battery cell modules and external devices. Through such a design, the aluminum bar group 2 can ensure the effective electrical connection of the battery cell module while maintaining the stability and reliability of the entire system. There are riveting posts 5 provided on the plastic suction isolation board 1, and the aluminum bar group 2 is fixed through the riveting posts 5. The distance from the top of the riveting post 5 to the heat-riveted surface is less than 1.5 mm. The top of the riveting post 5 is a dome-shaped protrusion 51 larger than the diameter of the column body of the riveting post.

[0023] The flexible flat wire component 3 includes a flexible circuit board one 31, an NTC reinforcement board 32, an NTC bracket 33, and a temperature sensor 34; the flexible circuit board one 31 is installed on the plastic suction isolation board 1, the flexible circuit board two 35 is connected to the temperature sensor 34, the temperature sensor 34 is installed on the plastic suction isolation board 1 through the NTC bracket 33, and the NTC reinforcement board 32 is attached and connected below the temperature sensor 34; the temperature sensor 34 is used to monitor the temperature of the battery cells, provide key data for the battery management system (BMS) to achieve temperature monitoring and control the working state of the battery cells, and ensure the safety and performance of the battery. The NTC reinforcement board 32 and the NTC bracket 33 are attached above or on the side of the temperature sensor 34 to fix the temperature sensor 34 and protect it from mechanical damage. Specifically, the NTC reinforcement board 32 and the NTC bracket 33 refer to an additional layer of reinforcement material attached below or on the side of the temperature sensor 34 to fix the NTC and protect it from mechanical damage. The reinforcement board enhances the protection of the temperature sensor 34, ensures the stability of the temperature sensor 34 in a dynamic environment, and at the same time protects the temperature sensor 34 from external impact or pressure damage, ensuring the accuracy of temperature detection. The reinforcement material can include but is not limited to the following: for example, polyimide or other polymer materials, which usually have high thermal stability and good mechanical strength (except for metals), or for example, FR4, PC + ABS, PA + GF30, etc., which can provide better mechanical strength and thermal stability, and help the NTC thermistor better thermally couple with the object to be measured.

[0024] The heat-conducting pad 4 is connected between the battery cell and the temperature sensor 34 to transfer the heat of the battery cell to the temperature sensor 34.

[0025] The application of the flexible flat wire core connection component solution with a polyimide insulating layer for vehicles brings a series of advantages, for the following reasons: First, there is a reduction in material usage. By using flexible flat wires with a polyimide insulating layer, compared to traditional flexible circuit boards or double-sided boards, the CCS material is used more sparingly because it can reduce the material usage of the NTC bracket and reduce material waste. Second, the traditional flexible circuit manufacturing process is complex (more than 45 processes such as dry film pasting, exposure, development, etching, film removal, chemical cleaning, etc.). By using this flexible flat wire, the process is greatly simplified (about 20 processes such as lamination, baking, cutting, terminal crimping, etc.). The production process is relatively simple and does not require a complex etching process, which simplifies the production process and reduces production time. Due to the simplified process, the manufacturing difficulty is also reduced. Manufacturers can produce components with stable quality without highly specialized technology and equipment.

[0026] In summary, the application of this new structure not only achieves weight reduction and cost reduction of CCS components, but also helps to lighten the battery module, improve cost-effectiveness and system reliability. In addition, this solution helps to improve the energy efficiency and endurance of new energy vehicles, meeting the requirements of industry sustainable development. By adopting this solution, vehicle manufacturers can meet the market demand for high-performance, low-cost, and environmentally friendly new energy vehicles, thus maintaining an advantage in the competition.

[0027] The above embodiments are not limitations on the present utility model, nor is the present utility model limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model also fall within the protection scope of the present utility model.

Claims

1. A polyimide insulated flexible flat wire battery core connection assembly for automobiles, characterized in that: include: The blister isolation plate (1) is located at the bottom layer and serves as a base plate for supporting and fixing; An aluminum bar group (2) is mounted on the blister isolation plate (1) to achieve electrical connection between the battery cells; A flexible flat wire assembly (3) comprises a flexible circuit board (31), an NTC reinforcement plate (32), an NTC bracket (33) and a temperature sensor (34); the flexible circuit board (31) is mounted on the blister isolation plate (1), the flexible circuit board (31) is connected to a flexible circuit board (35), the flexible circuit board (35) is connected to the temperature sensor (34), the temperature sensor (34) is mounted on the blister isolation plate (1) via the NTC bracket (33), and the NTC reinforcement plate (32) is attached to the flexible circuit board (35); A thermal pad (4) is connected between the battery core and the temperature sensor (34) and is used to transfer the heat of the battery core to the temperature sensor (34).

2. The automotive polyimide insulated flexible flat wire battery core connection assembly according to claim 1, characterized in that: The aluminum bar group (2) includes a connecting piece aluminum bar (21), a cross-connecting aluminum bar (22) and an output stage aluminum bar (23).

3. The automotive polyimide insulated flexible flat wire battery core connection assembly according to claim 1, characterized in that: The NTC reinforcing plate (32) is attached above or to the side of the temperature sensor (34) to fix the temperature sensor (34) and protect it from mechanical damage.

4. The automotive polyimide insulated flexible flat wire battery core connection assembly according to any one of claims 1 to 3, characterized in that: The blister isolation plate (1) is provided with rivet posts (5), and the aluminum bar group (2) is fixed by the rivet posts (5).

5. The automotive polyimide insulated flexible flat wire battery core connection assembly according to claim 4, characterized in that: The distance between the top of the rivet post (5) and the heat-riveted surface is less than 1.5 mm.

6. The automotive polyimide insulated flexible flat wire battery core connection assembly according to claim 5, characterized in that: The top of the rivet post (5) is a dome-shaped protrusion (51) that is larger than the diameter of the rivet post body.

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