A CCS component and battery pack

Abstract

This utility model discloses a CCS component and battery pack, belonging to the field of battery technology. The CCS component includes a tray, a flexible circuit board, a plate, a nickel plate, and a first buffer. The flexible circuit board is disposed on one side of the tray. One end of the nickel plate is electrically connected to the flexible circuit board, and the other end of the nickel plate is electrically connected to the plate. The nickel plate has a first buffer structure located between the plate and the flexible circuit board. The first buffer is disposed on the side of the tray away from the flexible circuit board. The battery pack includes a battery module and the aforementioned CCS component, with the first buffer located between the tray and the battery module. The first buffer provides support to the tray and absorbs vibration and impact using its own elasticity to reduce the tension on the flexible circuit board and prevent it from tearing. The first buffer structure undergoes elastic deformation to offset vibration and impact, reducing the tension on the nickel plate and preventing it from breaking or falling off.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a CCS component and battery pack. Background Technology

[0002] Flexible printed circuit boards (FPCs) are used in battery packs to connect the battery management system (BMS) board and the battery cells. The FPCs transmit information such as temperature and pressure from the battery cells to the BMS board, enabling the BMS board to monitor and protect the cells. Typically, the battery cells are electrically connected to the battery contacts, and nickel strips are mounted on the FPCs and connected to the contacts. During battery pack use, vibration and impact may occur, causing the FPCs to bend or even tear. Since the nickel strips are usually soldered to the contacts and the FPCs, vibration and impact may cause the nickel strips to break or the solder joints to detach, leading to battery pack failure. Utility Model Content

[0003] This invention provides a CCS component and battery pack to solve the technical problem that vibration and impact can easily lead to battery pack failure in the prior art.

[0004] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0005] A CCS component, comprising:

[0006] tray;

[0007] A flexible circuit board is disposed on one side of the tray;

[0008] A bar sheet and a nickel sheet, one end of the nickel sheet being electrically connected to the flexible circuit board, and the other end of the nickel sheet being electrically connected to the bar sheet; the nickel sheet has a first buffer structure located between the bar sheet and the flexible circuit board;

[0009] The first buffer is disposed on the side of the tray away from the flexible circuit board.

[0010] Preferably, the first buffer structure extends in an arch shape and arches towards the first buffer member; or, the first buffer structure extends in a wave shape.

[0011] Preferably, the flexible circuit board includes a main board body and a connecting arm, the connecting arm being connected to the nickel sheet, and the main board body and the connecting arm being connected by a second buffer structure.

[0012] Preferably, the second buffer structure extends in an arch shape and arches away from the first buffer member; or, the second buffer structure extends in a wave-like shape.

[0013] Preferably, the motherboard body has a notch, and the connecting arm is located within the notch.

[0014] Preferably, a first recess is provided on one side of the tray, and a first protrusion is formed on the corresponding other side. The flexible circuit board is disposed in the first recess, and the first buffer is disposed in the first protrusion.

[0015] Preferably, the tray is further provided with a second recess, the depth of which is greater than the depth of the first recess, and the plaster is disposed in the second recess.

[0016] Preferably, the first recess is provided with a plurality of first positioning posts, and the flexible circuit board is provided with a first positioning hole corresponding to the position of the first positioning post, with the first positioning post passing through the first positioning hole.

[0017] A battery pack, comprising:

[0018] Battery housing;

[0019] The battery module is housed within the battery casing.

[0020] In the CCS assembly described above, the first buffer is located between the tray and the battery module, and the pad is electrically connected to the battery module.

[0021] Preferably, the battery housing includes a cover, the CCS assembly is disposed on the side of the battery module near the cover, and a second buffer is disposed between the cover and the CCS assembly, the second buffer abutting against the cover and the battery plate.

[0022] Preferably, the hardness of the first buffer is greater than that of the second buffer, and / or the compression ratio of the first buffer is less than that of the second buffer.

[0023] The beneficial effects of this utility model are:

[0024] The CCS assembly proposed in this utility model features a flexible circuit board positioned on one side of a tray. A first buffer is located on the side of the tray furthest from the flexible circuit board. When the flexible circuit board is subjected to vibration and impact, it compresses the tray, and the first buffer provides support to the tray, absorbing vibration and impact through its own elasticity to reduce the tension on the flexible circuit board and prevent tearing. One end of a nickel sheet is electrically connected to the flexible circuit board, and the other end is electrically connected to a retaining plate. The nickel sheet has a first buffer structure located between the retaining plate and the flexible circuit board. When the flexible circuit board is subjected to vibration and impact, it pulls on the nickel sheet. Due to the first buffer structure, this structure undergoes elastic deformation to offset the vibration and impact, reducing the tension on the nickel sheet and preventing breakage or detachment. Furthermore, the flexible circuit board utilizes a second buffer structure to further offset vibration and impact, enhancing the buffering effect. A second buffer, providing insulation and resistance to pressure rebound, is also provided between the lid and the CCS assembly to further improve the protective effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of the battery pack provided in an embodiment of the present utility model;

[0027] Figure 3 yes Figure 2 Enlarged view of point A;

[0028] Figure 4 This is a schematic diagram of the battery pack structure provided in this embodiment of the present invention, omitting the case cover;

[0029] Figure 5 This is a partial structural schematic diagram of the battery pack provided in an embodiment of the present utility model;

[0030] Figure 6 yes Figure 5 Enlarged view of point B;

[0031] Figure 7 This is a schematic diagram of the structure of the tray provided in an embodiment of the present utility model;

[0032] Figure 8 yes Figure 7 Enlarged view of point C;

[0033] Figure 9 This is a schematic diagram of the structure of the flexible circuit board provided in this embodiment of the utility model;

[0034] Figure 10 This is a schematic diagram of the structure of the nickel sheet provided in this embodiment of the utility model;

[0035] Figure 11 This is a schematic diagram of the structure of the plasmid provided in an embodiment of the present invention.

[0036] In the picture:

[0037] 10. Battery housing; 11. Housing cover;

[0038] 20. Battery module; 21. Battery cell; 22. Terminal post;

[0039] 30. CCS assembly; 31. Tray; 311. First recess; 312. Second recess; 313. First positioning post; 314. Second positioning post; 32. Flexible circuit board; 321. Main board body; 3211. Notch; 322. Connecting arm; 3221. Groove; 323. Second buffer structure; 324. First positioning hole; 33. Bracket; 331. Second positioning hole; 332. Third buffer structure; 34. Nickel sheet; 341. First buffer structure; 35. First buffer component;

[0040] 40. Second buffer. Detailed Implementation

[0041] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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; 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 utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] See Figures 1 to 11 This embodiment provides a battery pack, including a battery housing 10, a battery module 20, and a CCS assembly 30. The battery module 20 is disposed inside the battery housing 10, and the CCS assembly 30 is electrically connected to the battery module 20.

[0046] The CCS assembly 30 includes a tray 31, a flexible circuit board 32, a plate 33, a nickel plate 34, and a first buffer 35. The flexible circuit board 32 is disposed on one side of the tray 31. One end of the nickel plate 34 is electrically connected to the flexible circuit board 32, and the other end of the nickel plate 34 is electrically connected to the plate 33. The nickel plate 34 has a first buffer structure 341, which is located between the plate 33 and the flexible circuit board 32. The first buffer 35 is disposed on the side of the tray 31 away from the flexible circuit board 32.

[0047] When the flexible circuit board 32 is subjected to vibration and impact, it presses against the tray 31. The first buffer 35 provides support to the tray 31 and absorbs the vibration and impact using its own elasticity, thereby reducing the tension on the flexible circuit board 32 and preventing it from tearing. When the flexible circuit board 32 is subjected to vibration and impact, it pulls on the nickel sheet 34. Because the nickel sheet 34 has a first buffer structure 341, the first buffer structure 341 undergoes elastic deformation to offset the vibration and impact, reducing the tension on the nickel sheet 34 and preventing it from breaking or falling off. The battery module 20 includes multiple battery cells. A contact bar 33 is used for electrical connection between the battery cells, and the nickel sheet 34 connects to the contact bar 33 to collect battery cell information such as temperature and voltage.

[0048] By providing a first buffer structure 341 on the nickel sheet 34, failure of the nickel sheet 34 can be prevented, thereby improving the accuracy of cell information and playing a key role in enhancing the reliability, safety, and cycle life of the battery pack. The shape of the first buffer structure 341 can be set according to actual needs. In some embodiments, see Figure 3 and Figure 10 The first buffer structure 341 extends in an arched shape and arches towards the first buffer member 35. In some embodiments, the first buffer structure 341 extends in a wavy shape. In some embodiments, the first buffer structure 341 extends in a Z-shape or S-shape.

[0049] In the battery pack, the first buffer 35 is located between the tray 31 and the battery module 20. When the flexible circuit board 32 is subjected to vibration and impact and squeezes the tray 31, the first buffer 35 provides support for the tray 31 to prevent the vibration and impact from being transmitted to the battery module 20 and reduce the impact on the battery module 20.

[0050] The battery pack may include one set of battery modules 20 or multiple sets of battery modules 20. When the battery pack includes multiple sets of battery modules 20, a flexible circuit board 32 may be provided for each set of battery modules 20. One flexible circuit board 32 may be provided on each tray 31, or multiple flexible circuit boards 32 may be provided. Multiple nickel sheets 34 are provided on each flexible circuit board 32.

[0051] The flexible circuit board 32 includes a main board body 321 and a connecting arm 322. The connecting arm 322 is connected to the nickel sheet 34, and the main board body 321 and the connecting arm 322 are connected by a second buffer structure 323. When the flexible circuit board 32 is subjected to vibration and impact, the connecting arm 322 pulls on the nickel sheet 34. Due to the provision of the second buffer structure 323, the second buffer structure 323 will undergo elastic deformation to offset the vibration and impact, reduce the pulling of the connecting arm 322 on the nickel sheet 34, and prevent the connecting arm 322 and the nickel sheet 34 from breaking or falling off.

[0052] By providing a second buffer structure 323, failure of the connecting arm 322 is prevented, thereby protecting the nickel sheet 34. The shape of the second buffer structure 323 can be set according to actual needs. In some embodiments, see [reference needed]. Figure 3 and Figure 9 The second buffer structure 323 extends in an arched shape and arches away from the first buffer member 35. In some embodiments, the second buffer structure 323 extends in a wavy shape. In some embodiments, the second buffer structure 323 extends in a Z-shape or S-shape.

[0053] In this embodiment, the arching direction of the second buffer structure 323 is opposite to that of the first buffer structure 341, enabling it to provide protection in at least two directions and enhancing the buffering effect by providing multi-directional buffering. In another embodiment, the arching direction of the second buffer structure 323 can also be the same as that of the first buffer structure 341, allowing them to be stressed synchronously, avoiding shear fatigue, and also synergistically absorbing energy.

[0054] A notch 3211 is provided on the motherboard body 321, and the connecting arm 322 is located within the notch 3211. This makes full use of space and is rationally laid out to prevent the connecting arm 322 from protruding outside the motherboard body 321 and being easily bumped. The second buffer structure 323 is located between the connecting arm 322 and the motherboard body 321. The second buffer structure 323 is set within the notch 3211, making full use of space and improving space utilization.

[0055] In some embodiments, a slot 3221 is provided on the connecting arm 322, which reduces weight and increases the energy absorption space of the connecting arm 322 to guide the deformation of the connecting arm 322 and improve the buffering effect.

[0056] See Figures 5 to 9A first recess 311 is provided on one side of the tray 31, and a first protrusion is formed on the corresponding side. The flexible circuit board 32 is disposed in the first recess 311, and a first buffer 35 is disposed in the first protrusion. The first recess 311 serves to limit the position of the flexible circuit board 32, ensuring stable installation. The tray 31 is an insulating component, providing support, positioning, and insulation for the flexible circuit board 32. The first protrusion, formed on the corresponding side of the first recess 311, increases the contact area. When the flexible circuit board 32 is subjected to vibration and impact, it presses against the tray 31, and the first buffer 35 provides support to the first protrusion to ensure the stability of the tray 31.

[0057] The first recess 311 is provided with a plurality of first positioning posts 313, and the flexible circuit board 32 is provided with first positioning holes 324 corresponding to the positions of the first positioning posts 313, with the first positioning posts 313 passing through the first positioning holes 324. The first positioning posts 313 cooperate with the first positioning holes 324 to position the flexible circuit board 32, facilitating its installation. The first positioning posts 313 can be cylinders or prisms, and the corresponding first positioning holes 324 can be circular holes or polygonal holes.

[0058] The tray 31 also has a second recess 312, the depth of which is greater than the depth of the first recess 311. The tab 33 is disposed in the second recess 312. By providing the second recess 312, the tab 33 is limited, making the tab 33 stable in installation. The greater depth of the second recess 312 than the first recess 311 creates a height difference between the two recesses, i.e., the second recess 312 is lower than the first recess 311. This accommodates the thickness of the tab 33, balancing the height of the flexible circuit board 32 and the tab 33, and reducing the tilting of the nickel sheet 34.

[0059] Each tray 31 has multiple plasters 33 arranged on it. In order to achieve individual positioning of each plaster 33, multiple second recesses 312 are provided, and each second recess 312 is provided with one plaster 33. Limiting protrusions are provided between adjacent second recesses 312 to limit the plaster 33.

[0060] The second recess 312 is provided with a plurality of second positioning posts 314, and the tab 33 is provided with second positioning holes 331 corresponding to the positions of the second positioning posts 314, with the second positioning posts 314 passing through the second positioning holes 331. The second positioning posts 314, in cooperation with the second positioning holes 331, position the tab 33, facilitating its installation. The second positioning posts 314 can be cylinders or prisms, and the corresponding second positioning holes 331 can be circular holes or polygonal holes.

[0061] In the battery pack, the electrode pad 33 is electrically connected to the battery module 20. The battery module 20 includes multiple battery cells 21, and the electrode pad 33 is connected to the battery cells 21, specifically to the terminal post 22 of the battery cell 21. At least a portion of the electrode pad 33 has a third buffer structure 332. When the electrode pad 33 is subjected to vibration and impact, the third buffer structure 332 will undergo elastic deformation to offset the vibration and impact, reduce the deformation of the electrode pad 33, and prevent the electrode pad 33 from breaking or falling off.

[0062] The battery housing 10 includes a cover 11. A CCS assembly 30 is disposed on the side of the battery module 20 near the cover 11. A second buffer 40 is disposed between the cover 11 and the CCS assembly 30, and the second buffer 40 abuts against the cover 11 and the pad 33. By abutting against the cover 11 and the pad 33, the second buffer 40 and the cover 11 are seamless, increasing the contact area. When the cover 11 is subjected to vibration and impact, the second buffer 40 provides support for the cover 11 and absorbs vibration and impact using its own elasticity to prevent vibration and impact from being transmitted to the battery module 20, thus protecting the battery module 20.

[0063] By placing the first buffer 35 between the tray 31 and the battery module 20, and placing the second buffer 40 between the pad 33 and the cover 11, a dual protection function is achieved. Even if the cover 11 is subjected to vibration, impact, or even being stepped on, the elastic deformation of the first buffer 35 and the second buffer 40 can absorb the vibration and impact, thereby reducing damage to the CCS component 30 and the battery module 20.

[0064] In some embodiments, the hardness of the first buffer 35 is greater than that of the second buffer 40. The high hardness of the first buffer 35 can better support the tray 31 and also prevent the squeezing deformation between the cells of the battery module 20 to a certain extent, thus providing structural reinforcement. The low hardness of the second buffer 40 can absorb the impact or vibration between the battery pack 33 and other components (such as the cover 11), avoiding direct impact on the battery pack 33, reducing mechanical damage, and isolating the battery pack 33 to prevent short circuits. Exemplarily, the first buffer 35 is made of foam, such as rigid PU foam or MPP foam. The second buffer 40 is made of foam, such as silicone foam (good electrical insulation and high resilience) or PU foam (high resilience). The rigid PU foam of the first buffer 35 can block heat transfer between the tray 31 and the battery module 20 during thermal runaway propagation, while the MPP foam material utilizes the inertness of the MPP electrolyte to reduce the adverse effects of chemical corrosion on battery performance.

[0065] After the cover 11 is installed, both the first buffer 35 and the second buffer 40 are compressed. In some embodiments, the compression ratio of the first buffer 35 (e.g., less than 10%) is less than that of the second buffer 40. The lower compression ratio of the first buffer 35 means that it no longer has compressibility after being compressed to a certain extent. This prevents the tray 31 from moving too far toward the battery module 20 under external force and thus avoids displacement. It also helps control the tolerance of the installation height.

[0066] For example, the compression rate of the second buffer 40 is 30-50%. When the cover 22 is subjected to force, the second buffer 40 will absorb the impact force of the cover 22 and give priority to bearing pressure to protect the battery module 20. Moreover, the PU foam rebounds faster under pressure. The PU foam maintains elasticity from -40℃ to 150℃ and is suitable for extreme cold and high temperature cycling conditions. In addition, the second buffer 40 will generate a rebound force after compression, which will continue to act on the top of the battery plate 33, which can prevent the solder joint between the battery plate 33 and the cell from loosening, ensure that the conductive path is always stable, and improve the connection stability.

[0067] Battery packs are used to power electrical devices, which can be cars, mobile phones, portable devices, laptops, ships, spacecraft, medical devices, electric toys, and power tools, among others.

[0068] In addition to being used in battery packs, the aforementioned CCS component 30 can also be applied to any other scenario that requires a high degree of integration of functions such as multiple electrical connections, signal acquisition, structural fixation, and thermal management.

[0069] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A CCS component, characterized in that, include: Tray (31); A flexible circuit board (32) is disposed on one side of the tray (31); A bar sheet (33) and a nickel sheet (34), one end of the nickel sheet (34) being electrically connected to the flexible circuit board (32), and the other end of the nickel sheet (34) being electrically connected to the bar sheet (33); the nickel sheet (34) has a first buffer structure (341) located between the bar sheet (33) and the flexible circuit board (32); The first buffer (35) is disposed on the side of the tray (31) away from the flexible circuit board (32).

2. The CCS component according to claim 1, characterized in that, The first buffer structure (341) extends in an arch shape and arches toward the first buffer member (35); or, the first buffer structure (341) extends in a wave shape.

3. The CCS component according to claim 1, characterized in that, The flexible circuit board (32) includes a main board body (321) and a connecting arm (322). The connecting arm (322) is connected to the nickel sheet (34). The main board body (321) and the connecting arm (322) are connected by a second buffer structure (323).

4. The CCS component according to claim 3, characterized in that, The second buffer structure (323) extends in an arch shape and arches away from the first buffer (35); or, the second buffer structure (323) extends in a wave shape.

5. The CCS component according to claim 3, characterized in that, The main body (321) has a notch (3211), and the connecting arm (322) is located inside the notch (3211).

6. The CCS component according to claim 1, characterized in that, The tray (31) has a first recess (311) on one side and a first protrusion on the other side. The flexible circuit board (32) is disposed in the first recess (311) and the first buffer (35) is disposed in the first protrusion.

7. The CCS component according to claim 6, characterized in that, The tray (31) is also provided with a second recess (312), the recess depth of the second recess (312) is greater than the recess depth of the first recess (311), and the bar sheet (33) is provided in the second recess (312).

8. The CCS component according to claim 6, characterized in that, The first recess (311) is provided with a plurality of first positioning posts (313), and the flexible circuit board (32) is provided with a first positioning hole (324) corresponding to the position of the first positioning post (313), and the first positioning post (313) passes through the first positioning hole (324).

9. A battery pack, characterized in that, include: Battery housing (10); A battery module (20) is disposed inside the battery housing (10); The CCS assembly as claimed in any one of claims 1-8, wherein the first buffer (35) is located between the tray (31) and the battery module (20), and the tab (33) is electrically connected to the battery module (20).

10. The battery pack according to claim 9, characterized in that, The battery housing (10) includes a cover (11), the CCS assembly is disposed on the side of the battery module (20) near the cover (11), and a second buffer (40) is disposed between the cover (11) and the CCS assembly, the second buffer (40) abutting against the cover (11) and the plate (33).

11. The battery pack according to claim 10, characterized in that, The hardness of the first buffer (35) is greater than that of the second buffer (40), and / or the compression ratio of the first buffer (35) is less than that of the second buffer (40).

Images