A CCS integrated busbar for battery pack modules

Abstract

The utility model discloses a CCS integrated busbar for battery pack module, including insulating plate, install on the flexible circuit board and a plurality of busbars of insulating plate, a plurality of busbars are arranged respectively in the both sides of flexible circuit board, the front end of flexible circuit board is protruding in the outside of insulating plate, and the front end of flexible circuit board is equipped with the joint, its characterized in that: at least one tearable tear position is equipped with in the interval from front to back on the insulating plate, tear position is arranged below flexible circuit board, the front and back both sides of each tear position are equipped with a set of positioning member, and the positioning hole that is equipped with with positioning member cooperation on the flexible circuit board, and positioning member is inserted in the positioning hole, and the length of flexible circuit board between both sides positioning member is greater than the distance between both sides positioning member. The utility model has reduced the maintenance rate, has prolonged the life.

Description

Technical Field

[0001] This utility model relates to a CCS integrated busbar for battery pack modules, mainly used in the fields of new energy and energy storage. Background Technology

[0002] The integrated busbar (CCS) is a crucial component of the battery management system (BMS), primarily used to achieve high-voltage series and parallel connections between battery cells, while simultaneously collecting critical data such as battery temperature and voltage. The integrated busbar integrates signal acquisition components (such as FPC, PCB, FFC), plastic structural parts, and copper / aluminum busbars through processes like hot pressing and riveting, enabling current transmission, temperature monitoring, and voltage acquisition between battery cells. Its main applications include new energy vehicles, energy storage devices, and smart homes.

[0003] For integrated busbars using blister packs as insulation boards (the integrated busbar has both blister and hot-press structures; in this application, it is a blister structure, meaning the insulation board is a blister pack. The hot-press solution involves hot-pressing the FPC and busbar between two PET films), it is installed on top of the battery module to connect all the cells in the battery module via the FPC. A blister pack extends from the end of the FPC, and a connector (converter or adapter) is installed at the end of the FPC extending from the blister pack. The connector of the integrated busbar is then connected to the BMS via a wire harness. All the wire harnesses connecting the integrated busbar and the BMS are bundled together using methods such as bundling (there are many battery modules, so the number of wire harnesses is relatively large and needs to be bundled together to prevent tangling). They are then fixed in place using cable ties or clips. To save space and reduce costs, the wire harness length is not excessive, and the wire harness is relatively tight between the fixed position and the integrated busbar connector. In actual use, the following problems may arise:

[0004] 1. In new energy vehicles, due to vibration and shaking during vehicle operation, the wiring harness binding position may shift. In the case of shift, the shift of the wiring harness will be transmitted to the connector of the integrated busbar, and the connector of the integrated busbar will be directly transmitted to the FPC. Due to insufficient strength of the FPC, the FPC may be pulled off, resulting in high maintenance rate and short service life.

[0005] 2. In new energy vehicles and energy storage equipment, battery modules are subject to thermal expansion. The battery modules are installed in a housing, and the connectors at the FPC end are fixed to the side plates on the edge of the housing (in energy storage equipment, the connectors are fixed to the side plates on the edge of the housing; in new energy vehicles, the connectors can be fixed or not). Due to the thermal expansion of the battery module, the housing and side plates will deform and move, which will cause the connectors to shift. The displacement of the connectors may also cause the FPC to break, resulting in high maintenance rates and short service life. Summary of the Invention

[0006] The purpose of this invention is to provide a CCS integrated busbar for battery pack modules. By using this structure, the service life is effectively extended and the maintenance rate is reduced.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a CCS integrated busbar for a battery pack module, comprising an insulating plate, a flexible circuit board mounted on the insulating plate, and several busbars, wherein the several busbars are respectively arranged on both sides of the flexible circuit board, the front end of the flexible circuit board extends out of the insulating plate, and a connector is installed at the front end of the flexible circuit board; at least one tearable tear position is provided on the insulating plate from front to back, and the tear position is located below the flexible circuit board.

[0008] Each tear has a set of positioning members on its front and back sides, and the flexible circuit board has positioning holes that cooperate with the positioning members. The positioning members are inserted into the positioning holes.

[0009] The length of the flexible circuit board between the two positioning elements is greater than the distance between the two positioning elements.

[0010] In the above technical solution, the flexible circuit board disposed between the positioning members on both sides arches upward.

[0011] In the above technical solution, the positioning component includes two positioning posts, which are spaced apart from each other, and each positioning post is inserted into a positioning hole.

[0012] In the above technical solution, multiple through slots are provided on the insulating plate between the positioning members on both sides from left to right, and a connecting strip is formed between adjacent through slots. The through slots and the connecting strip constitute the tear position.

[0013] In the above technical solution, the width of the connecting strip at the front tear position is smaller than the width of the connecting strip at the adjacent rear tear position;

[0014] And / or, the number of connecting strips at the front tear position is less than the number of connecting strips at the adjacent rear tear position.

[0015] In the above technical solution, the busbars on both sides of the flexible circuit board are arranged at intervals from back to front, and each busbar is connected to the flexible circuit board via a connecting piece.

[0016] In the above technical solution, the tear position is located on the front side of the two frontmost connecting pieces.

[0017] In the above technical solution, the insulating plate on the front side of the two frontmost connecting pieces is provided with two longitudinal through grooves, the front end of the longitudinal through grooves is connected to the front end face of the insulating plate, and the tear position is located between the two longitudinal through grooves.

[0018] In the above technical solution, a cover plate can be detachably installed on the insulating plate, and the busbar and the flexible circuit board are disposed inside the cover plate;

[0019] And / or, the bottom of the cover plate is provided with a chamber, the front end of the chamber is connected to the front end face of the cover plate, and the insulating plate, busbar and flexible circuit board are disposed in the chamber.

[0020] In the above technical solution, the left and rear sides of the insulating plate are respectively provided with snap-fit ​​components. The snap-fit ​​components include at least one snap-fit ​​strip arranged at intervals from back to front. The inner walls of the left and right sides of the chamber are provided with snap-fit ​​grooves, and the snap-fit ​​strips are inserted into the snap-fit ​​grooves.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0022] 1. In this utility model, at least one tear position is provided on the insulating board, and positioning members are respectively provided on both sides of the tear position to position the flexible circuit board. The length of the flexible circuit board between the two positioning members is greater than the distance between the two positioning members, and it is arched upward. In the event of displacement of the joint, the tear position can be broken, thereby straightening the arch and playing an extension role, preventing the flexible circuit board from being broken, effectively extending the service life and reducing the maintenance rate.

[0023] 2. In this utility model, the cover plate and the insulating plate are fixed by side snap-fit, eliminating the need to drill holes in the cover plate, preventing dust, condensation, etc. from entering the battery cell, and effectively improving the safety of use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure in Embodiment 1 of this utility model (the cover plate does not completely cover the insulating plate);

[0025] Figure 2 This is a structural schematic diagram of Embodiment 1 of this utility model (the cover plate is not shown);

[0026] Figure 3 yes Figure 2 Enlarged view of the central tear location;

[0027] Figure 4 This is a partial enlarged view of the front end of the flexible circuit board in Embodiment 1 of this utility model (the connector is not shown);

[0028] Figure 5 This is a partial enlarged view of the front end of the insulating plate in Embodiment 1 of this utility model;

[0029] Figure 6 This is a schematic diagram of the cover plate in Embodiment 1 of this utility model.

[0030] The components are: 1. Insulating board; 2. Flexible circuit board; 3. Busbar; 4. Connector; 5. Tear position; 6. Positioning hole; 7. Positioning post; 8. Through groove; 9. Connecting strip; 10. Longitudinal through groove; 11. Connecting piece; 12. Cover plate; 13. Chamber; 14. Snap-fit ​​component; 15. Snap-slot; 16. Arch. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Example 1: See Figure 1-6 As shown, a CCS integrated busbar for a battery pack module includes an insulating plate 1, a flexible circuit board 2 mounted on the insulating plate 1, and a plurality of busbars 3. The plurality of busbars 3 are respectively arranged on both sides of the flexible circuit board 2. The front end of the flexible circuit board 2 extends out of the insulating plate 1, and a connector 4 is installed on the front end of the flexible circuit board 2. At least one tearable and breakable tear position 5 is provided on the insulating plate 1 from front to back, and the tear position 5 is located below the flexible circuit board 2.

[0033] Each tear position 5 has a set of positioning members on its front and rear sides, and the flexible circuit board 2 has positioning holes 6 that cooperate with the positioning members. The positioning members are inserted into the positioning holes 6.

[0034] The length of the flexible circuit board 2 between the two positioning members is greater than the distance between the two positioning members, and the flexible circuit board 2 disposed between the two positioning members is not fixedly connected to the insulating plate 1.

[0035] In this embodiment, the insulating plate is installed on the battery module, and each busbar is connected to the corresponding cell. All the cells and flexible circuit boards (FPC) in the battery module are connected through the busbars, and then connected to the BMS through the wiring harness using connectors. In energy storage devices, the connectors are generally fixed to the side plate of the battery module housing (the cells are installed inside the housing). Due to thermal expansion, the housing may expand and deform, causing the side plate to deform or shift, which in turn causes the connector to shift. In new energy vehicles, due to the movement, shaking, vibration, etc. of the vehicle, if the wiring harness shifts, the connector will shift accordingly. During the process of connector shifting (away from the front end of the insulating plate), the tensile force will be transmitted to the flexible circuit board, which may lead to the breakage of the flexible circuit board. In this embodiment, the flexible circuit board on the insulating plate is connected to the insulating plate, while the flexible circuit board between the two positioning members is not fixedly connected to the insulating plate (the flexible circuit board above the tear position is not connected to the insulating plate, but is suspended or in contact). Since the tear position can be torn or broken, and the tear position can withstand a lesser tensile force than the flexible circuit board, when the connector moves forward, the flexible circuit board will drive the front positioning member to move and break the tear position. Since the length of the flexible circuit board between the two positioning members is greater than the distance between the two positioning members, preferably, the flexible circuit board between the two positioning members is arched upward by 16. Therefore, when the connector moves forward, the tear position is broken, thereby gradually straightening the arch of the flexible circuit board. In this way, the flexible circuit board can be effectively prevented from being directly broken, ensuring a stable connection between the battery module and the BMS, thereby reducing the maintenance rate and extending the service life.

[0036] Furthermore, at least one tear point is provided, i.e., at least one arch is provided. If multiple tear points are provided, the flexible circuit board can have multiple arches, which can withstand a larger amount of connector displacement. The number of tear points can be selected according to the actual situation. In this embodiment, one tear point is sufficient to meet a certain displacement distance of the connector.

[0037] See Figure 2 , 3 As shown in Figure 5, the positioning component includes two positioning posts 7, which are spaced apart from each other on the left and right, and each positioning post 7 is inserted into a positioning hole 6.

[0038] Two positioning posts are provided on the front side of the tear and two positioning posts are provided on the rear side of the tear. The two positioning posts on the front side are respectively positioned opposite the two positioning posts on the rear side. The positioning holes are located close to the edge of the flexible circuit board, so as not to affect the normal conductivity of the flexible circuit board. The positioning posts are used to position the flexible circuit board at the tear. At the same time, when the flexible circuit board is subjected to tensile force, the tear is broken by the positioning posts and positioning holes on the front side, so that the arch of the flexible circuit board at the tear can be straightened, which facilitates the extension of the flexible circuit board after the tear breaks and prevents the flexible circuit board from breaking.

[0039] See Figure 5 As shown, multiple through slots 8 are provided on the insulating plate 1 between the positioning members on both sides from left to right, and connecting strips 9 are formed between adjacent through slots 8. The through slots 8 and connecting strips 9 constitute the tear position 5.

[0040] Among them, there is at least one connecting strip. The presence of at least one connecting strip can reduce the difficulty of tearing or breaking, thereby ensuring that the connecting strip can be torn off without damage to the flexible circuit board after the front end of the flexible circuit board is subjected to tension, thus straightening the arched flexible circuit board and preventing the flexible circuit board from being torn off.

[0041] If multiple tear points are used, the width of the connecting strip at the front tear point is smaller than the width of the connecting strip at the adjacent rear tear point. In this way, the strength of all connecting strips at the front tear point will be lower than the strength of all connecting strips at the rear tear point. Therefore, during the tearing process at the tear point, it can be ensured that the connecting strip at the foremost tear point is torn off. Only after the connecting strip at the front tear point is torn off can the connecting strip at the adjacent rear tear point be torn off. In this way, even if the arch of the flexible circuit board is straightened off and the displacement at the joint is not satisfied, the subsequent tear points will continue to be torn off, straightening the arch of the flexible circuit board at the subsequent tear points.

[0042] Furthermore, the number of connecting strips at the front tear position is less than the number of connecting strips at the adjacent rear tear position. This further ensures that all connecting strips at the front tear position will be torn first, guaranteeing that the tearing sequence is from front to back, and preventing the rear tear positions from being torn directly.

[0043] Among them, see Figure 5 As shown, the insulating board 1 has two longitudinal through slots 10. The front end of the longitudinal through slot 10 is connected to the front end face of the insulating board 1, and the top and bottom surfaces of the longitudinal through slot 10 are connected to the top and bottom surfaces of the insulating board 1, respectively. The tear position 5 is located between the two longitudinal through slots 10. This ensures that after the tear is broken, the insulating board in front of the torn part will move forward with the flexible circuit board above it, without affecting the normal straightening of the flexible circuit board.

[0044] See Figure 2 As shown, the busbars 3 on both sides of the flexible circuit board 2 are arranged at intervals from back to front, and each busbar 3 is connected to the flexible circuit board 2 via a connecting piece 11.

[0045] Each busbar has a hole with the bottom of the hole penetrating the bottom of the insulating plate. The hole is used to install conductive components, which are used to electrically connect the busbar and the battery cell. The connecting piece is used to connect the busbar and the flexible circuit board.

[0046] In order to ensure that the connection between the connecting piece and the flexible circuit board will not break due to the displacement of the flexible circuit board and to ensure the electrical connection performance, the tear position is set on the front side of the two frontmost connecting pieces.

[0047] More preferably, the longitudinal through slot is provided on the insulating plate in front of the two frontmost connecting pieces.

[0048] See Figure 1 , 6 As shown, a cover plate 12 can be detachably installed on the insulating plate 1, and the busbar 3 and the flexible circuit board 2 are disposed inside the cover plate 12;

[0049] The bottom of the cover plate 12 is provided with a chamber 13, the front end of the chamber 13 is connected to the front end face of the cover plate 12, the insulating plate 1, the busbar 3 and the flexible circuit board 2 are disposed in the chamber 13, and the connector is located on the front side outside the chamber.

[0050] To protect the busbars and battery cells from water and dust, a cover plate is installed.

[0051] See Figure 2 , 3 As shown in Figure 6, the insulating plate 1 is provided with a snap-fit ​​component 14 on the left and rear sides respectively. The snap-fit ​​component 14 includes at least one snap-fit ​​strip arranged at intervals from back to front. The inner walls of the left and right sides of the chamber 13 are provided with a snap-fit ​​groove 15, and the snap-fit ​​strip is inserted into the snap-fit ​​groove 15.

[0052] In this embodiment, the cover plate can be made of the same material as the insulating plate. To improve the ease of installation, snap-fit ​​components are provided on the left and right sides of the insulating plate. Multiple snap-fit ​​components are preferably arranged at intervals from back to front. A slot is provided on the inner wall of the chamber to mate with the snap-fit ​​components. The front end of the slot is connected to the front end of the cover plate, while the rear end is not connected to the rear end of the cover plate. In this method, the cover plate can be slidably installed onto the insulating plate from the rear side via the snap-fit ​​mechanism of the slot and the snap-fit ​​component. Alternatively, the cover plate can have a certain degree of elastic deformation capability, allowing it to be pressed directly onto the insulating plate from the top. During this process, the cover plates on the left and right sides of the chamber are bent to deform them. When the slot is aligned with the snap-fit ​​component, the side of the cover plate is released, restoring its original shape and allowing the snap-fit ​​component to engage with the slot, thus completing the installation of the cover plate and the insulating plate.

[0053] In this invention, the cover plate above the chamber is a single piece without openings. In existing technology, multiple holes are provided on the top surface of the cover plate to communicate with the bottom surface. A protrusion on the battery assembly is inserted into the openings in the cover plate, and then the cover plate and the battery assembly are locked and fixed by riveting (generally, the cover plate is not removed after installation, and even if it is removed, it is replaced with a new one). This structure has the following problems: dust can easily enter through the opening, affecting the battery cell. At the same time, due to condensation, water droplets can enter the battery cell through the opening, affecting the safety of the battery cell. In addition, since the battery cell is installed inside the battery assembly housing, the arrangement of the protrusion is inconvenient due to space constraints (or if the protrusion is placed on the insulating plate, condensate can also enter the insulating plate through the opening and come into contact with the busbar). Therefore, in this embodiment, no openings are provided on the cover plate. The cover plate is directly connected to the insulating plate by snap-fit, which can reduce the entry of dust and prevent condensate from entering the battery cell and busbar from above the cover plate, thus improving the safety of use.

[0054] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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 the invention. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. For instance, the two components can be mechanically connected by contact or abutting; they can also be directly hooked or connected by an intermediate medium; or they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A CCS integrated busbar for a battery pack module, comprising an insulating plate, a flexible circuit board mounted on the insulating plate, and a plurality of busbars, wherein the plurality of busbars are respectively arranged on both sides of the flexible circuit board, the front end of the flexible circuit board extends beyond the insulating plate, and a connector is installed at the front end of the flexible circuit board, characterized in that: The insulating board has at least one tearable tear position spaced from front to back, and the tear position is located below the flexible circuit board; Each tear has a set of positioning members on its front and back sides, and the flexible circuit board has positioning holes that cooperate with the positioning members. The positioning members are inserted into the positioning holes. The length of the flexible circuit board between the two positioning elements is greater than the distance between the two positioning elements.

2. The CCS integrated busbar for battery pack modules according to claim 1, characterized in that: The flexible circuit board positioned between the two positioning elements arches upwards.

3. The CCS integrated busbar for battery pack modules according to claim 1, characterized in that: The positioning component includes two positioning posts, which are spaced apart from each other on the left and right, and each positioning post is inserted into a positioning hole.

4. The CCS integrated busbar for battery pack modules according to claim 1, characterized in that: Multiple through slots are provided on the insulating plate between the positioning members on both sides from left to right, and a connecting strip is formed between adjacent through slots. The through slots and the connecting strip form the tear position.

5. The CCS integrated busbar for battery pack modules according to claim 4, characterized in that: The width of the connecting strip at the tear position on the front side is smaller than the width of the connecting strip at the tear position on the adjacent rear side; And / or, the number of connecting strips at the front tear position is less than the number of connecting strips at the adjacent rear tear position.

6. The CCS integrated busbar for battery pack modules according to claim 1, characterized in that: The busbars on both sides of the flexible circuit board are arranged at intervals from back to front, and each busbar is connected to the flexible circuit board via a connecting piece.

7. The CCS integrated busbar for battery pack modules according to claim 6, characterized in that: The tear is located on the front side of the two frontmost connecting pieces.

8. The CCS integrated busbar for battery pack modules according to claim 6, characterized in that: The insulating plate on the front side of the two frontmost connecting pieces is provided with two longitudinal through grooves. The front end of the longitudinal through grooves is connected to the front end face of the insulating plate. The tear position is located between the two longitudinal through grooves.

9. The CCS integrated busbar for battery pack modules according to claim 1, characterized in that: A cover plate can also be detachably installed on the insulating plate, and the busbar and the flexible circuit board are disposed inside the cover plate; And / or, the bottom of the cover plate is provided with a chamber, the front end of the chamber is connected to the front end face of the cover plate, and the insulating plate, busbar and flexible circuit board are disposed in the chamber.

10. The CCS integrated busbar for a battery pack module according to claim 9, characterized in that: The insulating plate is provided with snap-fit ​​components on its left and rear sides. Each snap-fit ​​component includes at least one snap-fit ​​strip arranged at intervals from back to front. The inner walls of the left and right sides of the chamber are provided with snap-fit ​​slots, and the snap-fit ​​strips are inserted into the snap-fit ​​slots.

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