Battery connection system, battery module, battery pack and vehicle

Abstract

The utility model relates to a battery connection system, a battery module, a battery pack and a vehicle, the battery connection system comprises an isolation plate, a busbar and a reinforcing plate used for fixing a temperature sensor; the busbar is fixed with the isolation plate; the reinforcing plate comprises a crimping part, the temperature sensor can collect the temperature of the battery cell through the isolation plate, the crimping part is clamped between the busbar and the isolation plate, and the busbar and the isolation plate limit the crimping part. According to the scheme, the overall structure of the battery connection system can be simplified, cost is reduced, installation procedures are simplified, and installation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, specifically to a battery connection system, a battery module, a battery pack, and a vehicle. Background Technology

[0002] The vehicle's battery thermal management system needs to perform targeted temperature control based on the collected battery temperature. The temperature acquisition function is achieved through a temperature acquisition unit equipped with a temperature sensor (NTC). The NTC needs to be attached to the surface of the battery cell to realize the function of acquiring the battery cell temperature signal.

[0003] In existing technologies, battery connection systems use an injection-molded bracket to fix the temperature acquisition unit, ensuring good adhesion between the NTC and the cell surface. The injection-molded bracket is typically held in place by two aluminum bars to limit its height. However, the use of an injection-molded bracket increases the number of components, makes the overall structure more complex, and increases costs. Furthermore, it adds an extra step of inserting the injection-molded bracket, which is both costly and complex.

[0004] Therefore, how to simplify the overall structure of the battery connection system, reduce costs, simplify the installation process, and improve installation efficiency is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a battery connection system, battery module, battery pack, and vehicle that can simplify the overall structure of the battery connection system, reduce costs, simplify installation procedures, and improve installation efficiency.

[0006] To address the aforementioned technical problems, this application provides a battery connection system, including an isolation plate, a busbar, and a reinforcing plate for fixing a temperature sensor; the busbar is fixed to the isolation plate; the reinforcing plate includes a crimping portion, the temperature sensor can collect the temperature of the battery cell through the isolation plate, the crimping portion is sandwiched between the busbar and the isolation plate, and the busbar and the isolation plate limit the crimping portion.

[0007] Optionally, the reinforcing plate further includes a fixing part, which is fixed to the isolation plate.

[0008] Optionally, the isolation plate is provided with a positioning groove adapted to the reinforcing plate, and the fixing part is fixed to the bottom of the positioning groove.

[0009] Optionally, along the direction from the fixing part to the pressing part, the distance between the two side walls of the pressing part gradually decreases.

[0010] Optionally, the sidewall of the positioning groove facing the groove opening is further provided with a guide surface.

[0011] Optionally, the fixing part is riveted to the isolation plate.

[0012] Optionally, the reinforcing plate is provided with a first riveting hole, and the isolation plate is provided with a first hot riveting post. The reinforcing plate and the isolation plate are riveted and fixed by the first hot riveting post passing through the first riveting hole.

[0013] Optionally, it also includes a flexible circuit board, the acquisition end of which is electrically connected to the temperature sensor. The flexible circuit board is also provided with a fixing hole, and the first hot riveting post passes through the first riveting hole and the fixing hole in sequence and is riveted and fixed to the flexible circuit board.

[0014] Optionally, the isolation plate is further provided with a second hot riveting post, and the busbar is also provided with a corresponding second riveting hole. The busbar and the isolation plate are riveted and fixed by the second hot riveting post passing through the second riveting hole.

[0015] Optionally, the isolation plate is provided with a collection hole or a collection notch, and the temperature sensor can collect the temperature of the battery cell through the collection hole or the collection notch.

[0016] Optionally, the reinforcing plate is provided with mounting holes for mounting temperature sensors, the positions of which correspond to the acquisition holes or the acquisition notches.

[0017] Optionally, the outer peripheral wall of the temperature sensor and the inner peripheral wall of the mounting hole are bonded together.

[0018] This application also provides a battery module, including the battery connection system described above.

[0019] This application also provides a battery pack, including the battery module as described above.

[0020] This application also provides a vehicle including the battery connection system described above, the battery module described above, or the battery pack described above.

[0021] The battery connection system, battery module, battery pack, and vehicle provided in this application have the following technical advantages compared to the prior art:

[0022] Because the busbar and the isolation plate are fixed, they limit the position of the crimping part, ensuring the stability of the reinforcing plate along the height direction during installation. This, in turn, ensures a stable connection between the temperature sensor and the battery cell. Compared to a solution that uses an injection-molded bracket and presses it against the busbar, this eliminates the need for an injection-molded bracket, simplifying the overall structure, reducing costs, and minimizing the bracket insertion process during installation, thus simplifying the installation operation and effectively improving installation efficiency. Furthermore, the busbar and the isolation plate directly limit the crimping part from both sides, resulting in a simpler overall structure and better stability. Attached Figure Description

[0023] Figure 1 This is an exploded view of the battery module provided in the embodiments of this application;

[0024] Figure 2 This is a partial structural diagram of the battery connection system provided in the embodiment of this application under the installed state;

[0025] Figure 3 yes Figure 2 Exploded view;

[0026] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0027] Figure 5 This is a structural schematic diagram of the reinforcing plate.

[0028] Appendix Figures 1-5 The reference numerals in the attached figures are explained as follows:

[0029] 1. Isolation plate, 11. Acquisition hole, 12. Positioning groove, 121. Guide surface, 13. First hot riveting post, 14. Second hot riveting post, 15. Mounting groove, 16. Connecting hole, 17. Extension groove.

[0030] 2 busbars, 21 second rivet hole;

[0031] 3 Reinforcing plate, 31 Fixing part, 32 Pressing part, 33 First riveting hole, 34 Mounting hole;

[0032] 4. Flexible circuit board; 41. Data acquisition end; 42. Fixing hole;

[0033] 5 cells, 51 terminals. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] This application provides a battery connection system, a battery module, a battery pack, and a vehicle, wherein the vehicle includes a battery pack, and the battery pack includes a battery module, such as... Figure 1 As shown, the battery module includes multiple cells 5 arranged side by side in sequence and a battery contact system (CCS). The battery contact system is located on top of the cells 5 and is used for connecting the cells 5 and collecting the temperature, voltage, etc. of the cells 5, and transmitting the collected results to the vehicle's BMS system.

[0036] like Figures 2-4As shown, the battery connection system provided in this application embodiment includes an isolation plate 1, a busbar 2, a temperature sensor (not shown in the figure) and a reinforcing plate 3.

[0037] Among them, the isolation plate 1 has the characteristics of insulation and pressure resistance, and is used for the installation and fixing of components such as busbar 2 and flexible circuit board 4. The isolation plate 1 can be formed by heating and softening a flat plastic rigid sheet, and then using vacuum adsorption to cool it on the surface of a mold. The isolation plate 1 is provided with a collection hole 11.

[0038] The temperature sensor is fixed to the reinforcing plate 3, which is used to install the temperature sensor. The reinforcing plate 3 can be made of fiberglass board, which has high strength and can play the role of insulation and physical protection. The reinforcing plate 3 is fixed to the isolation plate 1. In the fixed state, the acquisition hole 11 corresponds to the temperature sensor. The temperature sensor can be attached to the battery cell 5 through the acquisition hole 11 of the isolation plate 1 to acquire the temperature of the battery cell 5.

[0039] Of course, the isolation plate 1 can also be provided with a sampling notch. This sampling notch can be set at the edge of the isolation plate 1, and the temperature sensor can collect the temperature of the battery cell 5 through this sampling notch. Specifically, a sampling hole 11 or a sampling notch can be set in the isolation plate 1 according to the actual situation. For ease of explanation, the following description will take the isolation plate 1 with a sampling hole 11 as an example.

[0040] Busbar 2 can be made of aluminum or copper and is used to connect the battery cell 5 for current transmission. Busbar 2 is fixed to the isolation plate 1. The reinforcing plate 3 includes a crimping part 32, which is sandwiched between busbar 2 and isolation plate 1. Busbar 2 and isolation plate 1 can limit the crimping part 32, so that the crimping part 32 can be stably attached to the isolation plate 1, ensuring the positional stability between the reinforcing plate 3 and the isolation plate 1, thereby ensuring the reliability of the temperature sensor in collecting the temperature of the battery cell 5 through the acquisition hole 11.

[0041] Since the busbar 2 and the isolation plate 1 are fixed, they limit the position of the crimping part 32, ensuring the stability of the reinforcing plate 3 along the height direction in the installed state. This, in turn, ensures a stable connection between the temperature sensor and the battery cell 5. Compared to the solution of setting an injection-molded bracket and pressing it with the busbar 2, this eliminates the need for an injection-molded bracket, simplifying the overall structure, reducing costs, and reducing the bracket insertion process during installation, thus simplifying the installation operation and effectively improving installation efficiency. Furthermore, the busbar 2 and the isolation plate 1 directly limit the crimping part 32 from both sides, resulting in a simpler overall structure and better stability.

[0042] like Figure 5As shown, the reinforcing plate 3 also includes a fixing part 31, which is fixed to the isolation plate 1. That is, the fixing part 31 of the reinforcing plate 3 is directly fixed to the isolation plate 1, and the pressing part 32 of the reinforcing plate 3 is pressed by the busbar 2 to stably adhere to the isolation plate 1.

[0043] Compared to the scheme where both sides of the reinforcing plate 3 are pressed by the busbar 2, this configuration allows the reinforcing plate 3 to be pressed by the busbar 2 on only one side. The busbar 2 does not require an extension or other irregular structure, making it suitable for the structure of the busbar 2 in existing battery connection systems. This reduces the structural requirements for the busbar 2, improves its applicability, and ensures better stability when the fixing part 31 is directly fixed to the separator plate 1. Furthermore, compared to the scheme where the reinforcing plate 3 is completely fixed to the separator plate 1, this embodiment only requires one side to be directly fixed, while the other side is pressed and fixed by the busbar 2. This simplifies the overall structure, reduces costs, and simplifies the process while ensuring stability.

[0044] Preferably, such as Figure 5 As shown, the reinforcing plate 3 has a mounting hole 34, which is positioned to correspond to and communicate with the acquisition hole 11 or acquisition notch on the isolation plate 1. The temperature sensor is located inside the mounting hole 34 and can acquire the temperature of the battery cell 5 through the acquisition hole 11. The fixing part 31 and the pressing part 32 are located on opposite sides of the reinforcing plate 3, and the mounting hole 34 is located between the fixing part 31 and the pressing part 32. The temperature sensor is located between the fixing part 31 and the pressing part 32. This further ensures the stability of the reinforcing plate 3 in the installed state and ensures the reliability of the temperature sensor acquiring the temperature of the battery cell 5 through the acquisition hole 11.

[0045] The outer peripheral wall of the temperature sensor and the inner peripheral wall of the mounting hole 34 are bonded together. Of course, in this embodiment, there is no limitation on the fixing method between the temperature sensor and the reinforcing plate 3. For example, it can also be fixed by snap-fitting or other methods. Bonding can simplify the structure and installation operation.

[0046] like Figure 3 and Figure 4 As shown, the isolation plate 1 is provided with a positioning groove 12, the shape and size of which are adapted to the shape and size of the reinforcing plate 3. The reinforcing plate 3 is installed into the positioning groove 12, which is used to position the reinforcing plate 3. A sampling hole 11 is provided at the bottom of the positioning groove 12, and the fixing part 31 is fixed to the bottom of the positioning groove 12. Of course, in this embodiment, the isolation plate 1 may not be provided with a positioning groove 12, and the reinforcing plate 3 can be placed on the surface of the isolation plate 1 and fixed to the isolation plate 1. Positioning the reinforcing plate 3 through the positioning groove 12 facilitates quick installation and ensures that the temperature sensor corresponds to the sampling hole 11 in the installed state.

[0047] In this embodiment, the structure of the reinforcing plate 3 is not limited; for example, it can be set as a square plate, or it can be as follows: Figure 5 As shown, along the direction from the fixing part 31 toward the pressing part 32, the distance between the two side walls of the pressing part 32 gradually decreases, specifically as follows: Figure 5 As shown, the crimping portion 32 has a V-shaped structure, with the pointed end of the V-shape located away from the fixing portion 31. Alternatively, the crimping portion 32 can be configured as a trapezoidal structure, with the shorter base of the trapezoid located away from the fixing portion 31. In other words, the crimping portion 32 has a gradually narrowing end width, and the end of the crimping portion 32 can be a pointed structure, a planar structure, or a curved surface. Correspondingly, as... Figure 4 As shown, the shape of the sidewall of the positioning groove 12 corresponds to the shape of the pressing part 32.

[0048] This configuration also limits the position of the reinforcing plate 3 located in the positioning groove 12, preventing it from rotating relative to the partition plate 1. Furthermore, setting the pressing part 32 to a structure with a tapered end width can reduce the space occupied by the pressing part 32 and the corresponding positioning groove 12 in the partition plate 1, facilitating spatial arrangement.

[0049] During installation, the reinforcing plate 3 can be tilted first, and the pressing part 32 can be inserted into the positioning groove 12. Since the end of the pressing part 32 is narrower, while the positioning groove 12 is wider on the side corresponding to the fixing part 31, the pressing part 32 can be easily inserted into the positioning groove 12. Then, the reinforcing plate 3 can be pushed so that the pressing part 32 moves to the side of the positioning groove 12 corresponding to the pressing part 32. Finally, the reinforcing plate 3 can be laid flat so that it is fully inserted into the positioning groove 12. With this configuration, compared to a square structure for the reinforcing plate 3, the two side walls of the pressing part 32 can form a guiding structure, which facilitates improved installation efficiency.

[0050] like Figure 4 As shown, a guide surface 121 is also provided on the side of the positioning groove 12 facing the groove opening. That is to say, the side wall of the positioning groove 12 facing the groove opening and the surface of the isolation plate 1 can be provided with an arc-shaped transition surface or an inclined transition surface, etc., to provide guidance for the reinforcing plate 3 during installation, which facilitates the installation operation.

[0051] In this embodiment, the fixing part 31 and the isolation plate 1 are fixed by riveting, such as Figure 4 and Figure 5As shown, the reinforcing plate 3 is provided with a first riveting hole 33, and the partition plate 1 is provided with a first hot riveting post 13. When the partition plate 1 is provided with a positioning groove 12, the first hot riveting post 13 is located on the bottom wall of the positioning groove 12. During installation, the first riveting hole 33 of the reinforcing plate 3 is fitted onto the first hot riveting post 13 and installed into the positioning groove 12. Then, the first hot riveting post 13 is heated and riveted to fix the reinforcing plate 3 to the partition plate 1. When the partition plate 1 is not provided with a positioning groove 12, the first hot riveting post 13 can be directly set on the surface of the partition plate 1.

[0052] Alternatively, the isolation plate 1 can be provided with rivet holes, and the reinforcing plate 3 can be provided with hot riveting posts. The reinforcing plate 3 is usually made of FR4 sheet, which can be directly processed into the reinforcing plate 3. Therefore, the method of providing the first rivet hole 33 in the reinforcing plate 3 is easier to obtain materials, simplifies requirements, and reduces costs compared to the method of providing hot riveting posts.

[0053] Of course, in this embodiment, there are no restrictions on the fixing method between the fixing part 31 and the isolation plate 1. For example, they can also be fixed by bonding, snapping, etc. And the two can be fixed by riveting, which can further ensure the stability of the fixation.

[0054] like Figures 1-3 As shown, the battery connection system also includes a flexible circuit board 4. The flexible circuit board 4 includes a data acquisition end 41, which is electrically connected to a temperature sensor. The flexible circuit board 4 also has a fixing hole 42. A first hot riveting post 13 passes through the first riveting hole 33 on the reinforcing plate 3 and the fixing hole 42 on the flexible circuit board 4 in sequence and is riveted to the flexible circuit board 4. Of course, in this embodiment, the first hot riveting post 13 can also pass through the first riveting hole 33 and be riveted to the reinforcing plate 3. There is no restriction on the fixing method of the flexible circuit board 4. For example, the flexible circuit board 4 can be bonded to the isolation plate 1, and the data acquisition end 41 can also be bonded to the reinforcing plate 3. When the first hot riveting post 13 passes through the first riveting hole 33 and the fixing hole 42 in sequence to achieve riveting fixation, the fixing method can be simplified, the process can be simplified, and the fixing stability between the data acquisition end 41 and the reinforcing plate 3 can be effectively guaranteed, thereby ensuring the connection stability between the flexible circuit board 4 and the temperature sensor.

[0055] like Figure 3 As shown, the isolation plate 1 is provided with a mounting groove 15 for installing the busbar 2, and the bottom wall of the mounting groove 15 is also provided with a connecting hole 16. The shape and structure of the mounting groove 15 are similar to those of the busbar 2, and it is used to position the busbar 2 to ensure that each busbar 2 can be connected to the corresponding terminal 51 of the battery cell 5 through the corresponding connecting hole 16 when the busbar 2 is fixed in the isolation plate 1, thus ensuring installation accuracy. Some mounting grooves 15 are provided with extension grooves 17, such as... Figure 3 and Figure 4As shown, the bottom wall of the extension groove 17 is provided with the positioning groove 12, and the positioning groove 12 is provided on the bottom wall of the mounting groove 15. The pressing part 32 of the reinforcing plate 3 located in the positioning groove 12 can be pressed by the busbar 2.

[0056] like Figures 2-4 As shown, the isolation plate 1 is also provided with a second hot riveting post 14, and the busbar 2 is also provided with a corresponding second riveting hole 21. During installation, the busbar 2 is placed in the corresponding mounting groove 15, and the second riveting hole 21 is fitted onto the second hot riveting post 14. The second hot riveting post 14 is then heated and riveted to fix the busbar 2 to the isolation plate 1. Of course, in this embodiment, there is no limitation on the fixing method between the busbar 2 and the isolation plate 1. For example, it can also be fixed by adhesive bonding, while fixing by riveting can further ensure the fixing stability between the busbar 2 and the isolation plate 1.

[0057] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A battery connection system, characterized by It includes an isolation plate (1), a busbar (2) and a reinforcing plate (3) for fixing the temperature sensor; The busbar (2) is fixed to the isolation plate (1); The reinforcing plate (3) includes a crimping part (32). The temperature sensor can collect the temperature of the cell (5) through the isolation plate (1). The crimping part (32) is sandwiched between the busbar (2) and the isolation plate (1). The busbar (2) and the isolation plate (1) limit the crimping part (32).

2. The battery connection system of claim 1, wherein, The reinforcing plate (3) also includes a fixing part (31), which is fixed to the isolation plate (1).

3. The battery connection system of claim 2, wherein, The isolation plate (1) is provided with a positioning groove (12) that is compatible with the reinforcing plate (3), and the fixing part (31) is fixed to the bottom of the positioning groove (12).

4. The battery connection system of claim 3, wherein, Along the direction from the fixing part (31) to the pressing part (32), the distance between the two side walls of the pressing part (32) gradually decreases.

5. The battery connection system of claim 3, wherein, The side wall of the positioning groove (12) facing the groove opening is also provided with a guide surface (121).

6. The battery connection system according to any of claims 2-5, characterized in that, The fixing part (31) is riveted to the isolation plate (1).

7. The battery connection system of claim 6, wherein, The reinforcing plate (3) is provided with a first riveting hole (33), and the isolation plate (1) is provided with a first hot riveting post (13). The reinforcing plate (3) and the isolation plate (1) are riveted and fixed by the first hot riveting post (13) passing through the first riveting hole (33).

8. The battery connection system of claim 7, wherein, It also includes a flexible circuit board (4), the acquisition end (41) of the flexible circuit board (4) is electrically connected to the temperature sensor, the flexible circuit board (4) is also provided with a fixing hole (42), the first hot riveting post (13) passes through the first riveting hole (33) and the fixing hole (42) in sequence and is riveted and fixed to the flexible circuit board (4).

9. The battery connection system of any of claims 1-8, wherein, The isolation plate (1) is also provided with a second hot riveting post (14), and the busbar (2) is also provided with a second riveting hole (21). The busbar (2) and the isolation plate (1) are riveted and fixed by the second hot riveting post (14) passing through the second riveting hole (21).

10. The battery connection system of any one of claims 1-8, wherein, The isolation plate (1) is provided with a collection hole (11) or a collection notch, and the temperature sensor can collect the temperature of the battery cell (5) through the collection hole (11) or the collection notch.

11. The battery connection system of claim 10, wherein, The reinforcing plate (3) is provided with mounting holes (34) for installing temperature sensors, the position of which corresponds to the acquisition hole (11) or the acquisition notch.

12. The battery connection system of claim 11, wherein, The outer peripheral wall of the temperature sensor and the inner peripheral wall of the mounting hole (34) are bonded and fixed together.

13. A battery module, characterized by Includes the battery connection system as described in any one of claims 1-12.

14. A battery pack, characterized by Includes the battery module as described in claim 13.

15. A vehicle characterized by comprising: This includes the battery connection system as described in any one of claims 1-12, the battery module as described in claim 13, or the battery pack as described in claim 14.

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