Battery pack

Abstract

Disclosed in the present application is a battery pack. The battery pack comprises a module; a cover plate, wherein the cover plate is connected to the module and has a mounting opening; and a CCS, wherein the CCS comprises a first bracket, a second bracket and a BMS slave board, the first bracket being connected to the module, the second bracket being located on the side of the first bracket away from the module and connected to the first bracket, the BMS slave board being located between the first bracket and the second bracket and connected to the second bracket, the first bracket and the second bracket being insulating members, and the second bracket and the BMS slave board passing through the mounting opening. According to the battery pack of the present application, the first bracket and the second bracket prevent the BMS slave board from being electrically short-circuited, thereby ensuring a good insulation performance of the BMS slave board during operation of the battery pack. Only the mounting opening for the second bracket and the BMS slave board to pass through needs to be provided on the cover plate, such that the structure of the cover plate is simple, thereby effectively reducing the difficulty of production and processing of the cover plate, and further lowering the costs of the battery pack.

Description

battery pack

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. CN202520292888.4, entitled "Battery Pack," filed on February 21, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0004] The BMS (Battery Management System) slave board, which makes up the CCS (Cells Contact System) assembly, collects data such as battery pack temperature and cell voltage and transmits it to the BMS mainboard for processing to ensure the safe, reliable, and efficient use of the battery pack throughout its lifespan. However, in existing technologies, because the BMS slave board needs to maintain good insulation performance during operation to prevent safety issues caused by electrical faults, the battery pack cover plate usually has a special insulation structure to effectively insulate the BMS slave board. However, this complex cover plate structure increases the difficulty of production and processing, thereby increasing the overall cost of the battery pack.

[0005] Public content

[0006] In view of this, the purpose of this application is to provide a battery pack with a simple cover structure, thereby effectively reducing the difficulty of production and processing of the cover, and thus reducing the cost of the battery pack.

[0007] In a first aspect, this application provides a battery pack, comprising: a module; a cover plate connected to the module, the cover plate having a mounting opening; and a CCS component, the CCS component including a first bracket, a second bracket, and a BMS slave plate, the first bracket being connected to the module, the second bracket being located on the side of the first bracket away from the module and connected to the first bracket, the BMS slave plate being located between the first bracket and the second bracket and connected to the second bracket, the first bracket and the second bracket being insulating components, and the second bracket and the BMS slave plate passing through the mounting opening.

[0008] Beneficial effects: The first and second brackets of the battery pack can prevent electrical short circuits in the BMS slave board and ensure good insulation performance of the BMS slave board when the battery pack is working. The cover plate only needs to be opened for the second bracket and the BMS slave board to pass through. Therefore, the structure of the cover plate is simple, which effectively reduces the difficulty of production and processing of the cover plate, and thus reduces the cost of the battery pack.

[0009] In some embodiments, the CCS component further includes a bus located between the first bracket and the BMS slave board, the bus being connected to the module, and the first bracket being connected to the bus.

[0010] In some embodiments, the CCS component further includes an FPC, the two ends of which are connected to the busbar and the BMS slave board, respectively, along the first bracket and the first bracket arrangement direction.

[0011] In some embodiments, the FPC is connected to the busbar via foam adhesive.

[0012] In some embodiments, the second bracket has a first hot-riveting post on the side facing the first bracket, and the BMS slave plate has a mating hole that mates with the first hot-riveting post.

[0013] In some embodiments, the first bracket has a buckle on the side facing the second bracket, and the second bracket has a first slot that engages with the buckle.

[0014] In some embodiments, there are multiple buckles, and the first slots are multiple buckles that correspond one-to-one with each buckle.

[0015] In some embodiments, the BMS slave board has a second slot disposed opposite to the first slot, and the buckle passes through the second slot.

[0016] In some embodiments, the first bracket has a positioning post on the side facing the second bracket, and the second bracket has a first positioning hole that mates with the positioning post.

[0017] In some embodiments, the module includes a plurality of battery cells arranged along a first direction, and the cover plate and the CCS component are located on the same side of the module along a second direction, wherein the first direction and the second direction are perpendicular. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 is a structural diagram of a battery pack according to an embodiment of this application;

[0020] Figure 2 is an enlarged view of point A in Figure 1;

[0021] Figure 3 is an exploded view of a battery pack according to an embodiment of this application;

[0022] Figure 4 is an enlarged view of point B in Figure 3;

[0023] Figure 5 is a structural diagram of the second bracket and the BMS slave board according to an embodiment of this application.

[0024] Figure label:

[0025] 100. Battery pack;

[0026] 1. Module; 11. Battery cell;

[0027] 2. Cover plate; 21. Mounting port; 22. Flanged edge;

[0028] 3. CCS component; 31. First bracket; 311. Buckle; 312. Positioning post; 32. Second bracket; 321. First hot riveting post; 322. First slot; 323. First positioning hole; 33. BMS slave board; 331. Mating hole; 332. Second slot; 333. Second positioning hole; 34. Busbar; 35. FPC. Embodiments of the present invention

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "upper," "lower," "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 this application and simplifying the description, and do not indicate or imply that the device or component 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. In the description of this application, "multiple" means two or more, and "at least one" can refer to one, two, or more, unless otherwise explicitly specified. The terms "first," "second," and "third," etc., are only for the convenience of description and are used to name parts or embodiments by number, and do not imply any order of importance between the parts or embodiments.

[0031] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0032] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0033] The battery pack 100 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0034] As shown in Figures 1 to 4, the battery pack 100 according to an embodiment of this application includes a module 1, a cover plate 2, and a CCS component 3.

[0035] The cover plate 2 is connected to the module 1 and has a mounting opening 21. The CCS component 3 includes a first bracket 31, a second bracket 32 ​​and a BMS slave plate 33. The first bracket 31 is connected to the module 1. The second bracket 32 ​​is located on the side of the first bracket 31 away from the module 1 and is connected to the first bracket 31. The first bracket 31 and the second bracket 32 ​​are insulating components. The BMS slave plate 33 is located between the first bracket 31 and the second bracket 32 ​​and is connected to the second bracket 32. The second bracket 32 ​​and the BMS slave plate 33 pass through the mounting opening 21.

[0036] It is understandable that the BMS is used to collect data such as cell temperature and cell voltage of each cell 11 in module 1. Since the first bracket 31 and the second bracket 32 ​​are insulating components, the first bracket 31 is located between the BMS slave board 33 and module 1, thereby preventing electrical short circuits between the BMS slave board 33 and module 1. At the same time, the BMS slave board 33 is located between the first bracket 31 and the second bracket 32, so that the cover plate 2 only needs to have an installation opening 21 for the second bracket 32 ​​and the BMS slave board 33 to pass through. The second bracket 32 ​​ensures good insulation performance of the BMS slave board 33 when the battery pack 100 is working, further preventing safety problems caused by electrical faults. Therefore, the cover plate 2 of this application has a simple structure, does not require a special structure, and only uses a die-cutting process to form the installation opening 21, effectively reducing the difficulty of production and processing of the cover plate 2, thereby reducing the cost of the battery pack 100.

[0037] Meanwhile, since the first bracket 31 is connected to the module 1, the second bracket 32 ​​is connected to the first bracket 31, and the second bracket 32 ​​is connected to the BMS slave board 33, the first bracket 31 and the second bracket 32 ​​provide certain mechanical support and fixation for the BMS slave board 33, ensuring the stability of the BMS slave board 33 and improving the reliability of the battery pack 100.

[0038] Furthermore, the first support 31 is made of polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS). This allows the first support 31 to combine the high mechanical strength, impact resistance, temperature resistance, and UV resistance of PC with the low-temperature resistance, chemical resistance, and good processability of ABS. This ensures the high electrical insulation performance of the first support 31, effectively preventing electrical short circuits between the BMS plate 33 and module 1.

[0039] The second support 32 is made of polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS). This combination gives the second support 32 the high mechanical strength, impact resistance, temperature resistance, and UV resistance of PC, as well as the low-temperature resistance, chemical resistance, and good processability of ABS. This ensures the high electrical insulation performance of the second support 32, effectively preventing electrical short circuits between the BMS plate 33 and module 1.

[0040] According to the battery pack 100 of this application embodiment, the cover plate 2 is connected to the module 1. The cover plate 2 has a mounting opening 21. The CCS component 3 includes a first bracket 31, a second bracket 32, and a BMS slave plate 33. The first bracket 31 is connected to the module 1. The second bracket 32 ​​is located on the side of the first bracket 31 away from the module 1 and is connected to the first bracket 31. The first bracket 31 and the second bracket 32 ​​serve as insulating components. The BMS slave plate 33 is located between the first bracket 31 and the second bracket 32 ​​and is connected to the second bracket 32. The second bracket 32 ​​and the BMS slave plate 33 pass through the mounting opening 21 so that the first bracket 31 and the second bracket 32 ​​prevent the BMS slave plate 33 from experiencing an electrical short circuit, ensuring good insulation performance of the BMS slave plate 33 when the battery pack 100 is working. This allows the cover plate 2 to only need to have a mounting opening 21 for the second bracket 32 ​​and the BMS slave plate 33 to pass through, making the structure of the cover plate 2 simple, thereby effectively reducing the difficulty of production and processing of the cover plate 2, and thus reducing the cost of the battery pack 100.

[0041] In some embodiments of this application, as shown in Figures 1-4, the CCS component 3 further includes a busbar 34. The busbar 34 is located between the first support 31 and the BMS slave board 33, and is connected to the module 1. The first support 31 is also connected to the busbar 34. Thus, by connecting the busbar 34 to the module 1 and the first support 31 to the busbar 34, an indirect connection is achieved between the first support 31 and the module 1. Simultaneously, by connecting the busbar 34 to the module 1, the positive and negative terminals of multiple battery cells 11 in the module 1 are connected in series, thereby concentrating the current generated by the multiple battery cells 11 to form a larger current output.

[0042] Furthermore, the busbar 34 is connected to the first bracket 31 via a second hot-riveting post. It is understood that the material used for the second hot-riveting post has certain insulating properties, ensuring electrical isolation between the busbar 34 and the first bracket 31 while simultaneously achieving the connection. At the same time, the second hot-riveting post solidifies upon cooling, forming a robust mechanical connection between the busbar 34 and the first bracket 31, thus improving the reliability of their connection.

[0043] In some embodiments of this application, as shown in Figures 1-4, the CCS component 3 further includes an FPC 35 (Flexible Printed Circuit). The FPC 35 is connected to the busbar 34 and the BMS slave board 33 at both ends along the first support 31 and its arrangement direction, respectively. It is understood that the FPC 35 can transmit data signals collected by the BMS slave board 33 to the BMS slave board 33, and can also receive control signals from the BMS slave board 33. Simultaneously, by connecting the FPC 35 to the busbar 34 and the BMS at both ends along the first support 31 and its arrangement direction, it further supports the BMS slave board 33, enhancing the overall stability of the battery pack 100 and preventing loosening or damage to connections due to vibration or impact.

[0044] In some embodiments of this application, the FPC 35 and the busbar 34 are connected by foam adhesive (not shown in the figure). Thus, the connection between the FPC 35 and the busbar 34 is achieved through the foam adhesive connection. Simultaneously, the foam adhesive separates the busbar 34 from the BMS slave plate 33, thereby reducing electrical interference and heat transfer, and improving the overall performance and safety of the battery system. Furthermore, the flexibility and elasticity of the foam adhesive provide good support and cushioning, protecting the BMS slave plate 33 from external impacts and vibrations, preventing damage to the BMS slave plate 33 during battery pack 100 operation or transportation, and extending the service life of the battery pack 100.

[0045] In some embodiments of this application, as shown in FIG5, the second bracket 32 ​​has a first hot-riveting post 321 on the side facing the first bracket 31, and the BMS slave plate 33 has a mating hole 331 that mates with the first hot-riveting post 321. Thus, by inserting the first hot-riveting post 321 into the mating hole 331 and heating it to a softened state, the connection between the second bracket 32 ​​and the BMS slave plate 33 is achieved. Furthermore, the solidification of the first hot-riveting post 321 after cooling further ensures a strong mechanical connection between the second bracket 32 ​​and the BMS slave plate 33, improving the reliability of the connection. Simultaneously, the material connected by the first hot-riveting post 321 has certain insulating properties, satisfying the electrical isolation requirements between the second bracket 32 ​​and the BMS slave plate 33 while achieving the connection.

[0046] Furthermore, the second bracket 32 ​​has multiple first hot riveting posts 321 on the side facing the first bracket 31, and multiple mating blocks corresponding one-to-one with the multiple first hot riveting posts 321, further improving the connection strength between the second bracket 32 ​​and the BMS slave plate 33.

[0047] In some embodiments of this application, as shown in Figures 1-5, the first bracket 31 has a buckle 311 on the side facing the second bracket 32, and the second bracket 32 ​​has a first slot 322 that engages with the buckle 311. Thus, the engagement of the buckle 311 and the first slot 322 enables the first bracket 31 and the second bracket 32 ​​to be snapped together, thereby fixing the second bracket 32 ​​and the BMS slave board 33 connected to it. Simultaneously, considering conditions such as high temperature and foam aging, the snap-fit ​​connection of the buckle 311 and the first slot 322 ensures the reliability of the connection between the first bracket 31 and the second bracket 32, and provides reinforcement and insulation protection for the BMS slave board 33, reducing the risk of damage to the BMS slave board 33 during vibration and component transportation. Furthermore, the snap-fit ​​connection structure of the buckle 311 and the first slot 322 is simple, reducing overall cost.

[0048] In some embodiments of this application, there are multiple buckles 311 and multiple first slots 322 corresponding one-to-one with the buckles 311. Thus, by having multiple buckles 311 cooperate with their corresponding first slots 322, the connection strength between the first bracket 31 and the second bracket 32 ​​is further improved, thereby enhancing the overall reliability of the battery pack 100.

[0049] In some embodiments of this application, as shown in Figures 1-5, the BMS slave plate 33 has a second slot 332 opposite to the first slot 322, and a buckle 311 passes through the second slot 332. Thus, by having the buckle 311 pass through the second slot 332 and engage with the first slot 322, the first bracket 31 is respectively engaged with the BMS slave plate 33 and the second bracket 32, further ensuring the stability of the BMS slave plate 33 and improving the overall structural strength.

[0050] In some embodiments of this application, as shown in Figures 1-5, the first bracket 31 has a positioning post 312 on the side facing the second bracket 32, and the second bracket 32 ​​has a first positioning hole 323 that mates with the positioning post 312. Thus, the positioning post 312, in conjunction with the first positioning hole 323, serves to pre-position the first bracket 31 before it is connected to the second bracket 32, preventing mistake-proofing, effectively improving the assembly efficiency of the battery pack 100, and reducing costs.

[0051] Furthermore, the BMS slave plate 33 has a second positioning hole 333 that is disposed opposite to the first positioning hole 323, and the positioning pin 312 passes through the first positioning hole 323 and the second positioning hole 333, thereby further improving assembly efficiency.

[0052] Furthermore, there are multiple positioning posts 312, and the first positioning hole 323 and the second positioning hole 333 correspond one-to-one with the multiple positioning posts 312, thereby better realizing the pre-positioning of the first bracket 31 and the second bracket 32 ​​and reducing assembly efficiency.

[0053] In some embodiments of this application, as shown in Figures 1-4, the module 1 includes multiple battery cells 11 arranged along a first direction. The cover plate 2 and the CCS component 3 are located on the same side of the module 1 along a second direction, and the first and second directions are perpendicular. This arrangement facilitates the BMS in collecting data such as temperature, voltage, and current of each battery cell 11 from the board 33, resulting in a more rational layout of the battery pack 100.

[0054] Furthermore, the busbar 34 is located between the first bracket 31 and the BMS slave board 33. The busbar 34 is connected to the module 1, and the first bracket 31 is connected to the busbar 34. This arrangement facilitates the connection of the positive and negative terminals of multiple cells 11 in the module 1 in series by the busbar 34, thereby improving the rationality of the layout of the battery pack 100.

[0055] Optionally, cell 11 is a blade cell.

[0056] In some embodiments, as shown in Figures 2 and 4, the cover plate 2 has flanges 22 extending toward the module 1 in a second direction at both ends along a third direction. The flanges 22 are bonded to the module 1, and the third direction, the first direction, and the second direction are perpendicular to each other. Thus, the cover plate 2 is fixed by such a configuration.

[0057] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims. Industrial applicability

[0058] The battery pack provided in this application has a cover plate connected to the module. The cover plate has an installation port. The CCS component includes a first bracket, a second bracket, and a BMS slave board. The first bracket is connected to the module. The second bracket is located on the side of the first bracket away from the module and is connected to the first bracket. The first bracket and the second bracket serve as insulators. The BMS slave board is located between the first bracket and the second bracket and is connected to the second bracket. The second bracket and the BMS slave board pass through the installation port so that the first bracket and the second bracket prevent electrical short circuits in the BMS slave board and ensure good insulation performance of the BMS slave board when the battery pack is working. This allows the cover plate to only have an installation port for the second bracket and the BMS slave board to pass through, simplifying the cover plate structure and effectively reducing the difficulty of production and processing of the cover plate, thereby reducing the cost of the battery pack.

Claims

1. A battery pack, characterized in that, include: Module; A cover plate, which is connected to the module, and has an installation port; The CCS component includes a first bracket, a second bracket, and a BMS slave board. The first bracket is connected to the module. The second bracket is located on the side of the first bracket away from the module and is connected to the first bracket. The BMS slave board is located between the first bracket and the second bracket and is connected to the second bracket. The first bracket and the second bracket are insulating components. The second bracket and the BMS slave board pass through the mounting port.

2. The battery pack according to claim 1, characterized in that, The CCS component also includes: A busbar is located between the first bracket and the BMS slave board, and the busbar is connected to the module. The first bracket is connected to the busbar.

3. The battery pack according to claim 2, characterized in that, The CCS component also includes: The FPC is connected to the busbar and the BMS slave board at both ends along the first bracket and the first bracket arrangement direction, respectively.

4. The battery pack according to claim 3, characterized in that, The FPC is connected to the busbar via foam adhesive.

5. The battery pack according to claim 1, characterized in that, The second bracket has a first hot-riveting post on the side facing the first bracket, and the BMS slave plate has a mating hole that mates with the first hot-riveting post.

6. The battery pack according to claim 1, characterized in that, The first bracket has a buckle on the side facing the second bracket, and the second bracket has a first slot that engages with the buckle.

7. The battery pack according to claim 6, characterized in that, There are multiple buckles, and the first slot is a plurality of buckles that correspond one-to-one with each buckle.

8. The battery pack according to claim 6, characterized in that, The BMS slave board has a second slot that is opposite to the first slot, and the buckle is inserted into the second slot.

9. The battery pack according to claim 6, characterized in that, The first bracket has a positioning post on the side facing the second bracket, and the second bracket has a first positioning hole that mates with the positioning post.

10. The battery pack according to claim 1, characterized in that, The module includes multiple battery cells arranged along a first direction, and the cover plate and the CCS component are located on the same side of the module along a second direction, wherein the first direction and the second direction are perpendicular.

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