Cover cell assembly of battery pack and battery pack

Abstract

The application provides a cover cell assembly of a battery pack and the battery pack. The cover comprises a cover plate and a plurality of support portions on one side surface of the cover plate; each support portion is connected with the cover plate, and an abutting surface is arranged at one end of each support portion away from the cover plate, and the abutting surface is configured to abut with a cell of the battery pack. When the cover is covered on the battery pack, the abutting surface of the support portion abuts with the cell, a rigid support system of the cover plate, the support portion and the cell is formed, structural coupling between the cover and the cell is realized, the structural rigidity of the cover is effectively improved, and resonance between the cover and the vehicle body is avoided to generate abnormal sound.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a cover cell assembly and a battery pack for a battery pack. Background Technology

[0002] In the field of new energy vehicles, battery packs, as core energy storage devices, play a crucial role in providing power to vehicles.

[0003] During vehicle operation, the existing battery pack cover is prone to resonance with the vehicle body, which can generate abnormal noises. This not only affects the driving comfort of the vehicle, but may also have an adverse impact on the structural stability of the battery pack and the reliability of its internal components. Utility Model Content

[0004] This application provides a cover cell assembly for a battery pack and a battery pack.

[0005] A first aspect of this application provides a cover cell assembly for a battery pack, the cover comprising:

[0006] Cover plate;

[0007] A plurality of support portions are located on one side surface of the cover plate; each support portion is connected to the cover plate, and each support portion has an abutment surface at one end away from the cover plate, the abutment surface being configured to abut against the battery cell of the battery pack.

[0008] In one embodiment, the width of the support gradually decreases from the direction of the cover plate toward the abutting surface; or, the width of the support remains constant from the direction of the cover plate toward the abutting surface.

[0009] In one embodiment, the support portion is a hollow structure.

[0010] In one embodiment, the support portion includes a connecting portion and an abutting portion. The connecting portion is connected to the cover plate, and the abutting portion is located at the end of the connecting portion away from the cover plate. The surface of the abutting portion away from the cover plate is the abutting surface. The width of the connecting portion is smaller than the width of the abutting portion.

[0011] In one embodiment, a plurality of the support portions are arranged along a first direction; each support portion is an integral strip structure, and each support portion extends along a second direction, wherein the first direction intersects the second direction.

[0012] In one embodiment, a plurality of the support portions are arranged along a first direction; the support portion includes a plurality of support members, and the plurality of support members of the same support portion are arranged at intervals along a second direction; the first direction intersects the second direction.

[0013] A second aspect of this application provides a battery pack, the battery pack including a battery module, a housing, and the aforementioned cover cell assembly;

[0014] The battery module is disposed inside the housing, and the battery module includes multiple cells arranged in parallel, each cell including a housing; the cover covers the opening of the housing, and the contact surface of each support abuts against the housing of the cell.

[0015] In one embodiment, the battery cell further includes two terminals extending from the housing; the plurality of support portions include a plurality of first support portions; each first support portion abuts against the housing of one of the battery cells, and the end of the first support portion away from the cover plate is located between the two terminals of the same battery cell; and / or, the plurality of support portions include a plurality of second support portions, each second support portion simultaneously abutting against the housings of two adjacent battery cells, and the end of the second support portion away from the cover plate is located between the terminals of two adjacent battery cells.

[0016] In one embodiment, an adhesive layer is provided between the contact surface and the housing of the battery cell.

[0017] In one embodiment, the contact surface is provided with a plurality of microstructures, which are used to increase the surface roughness of the contact surface.

[0018] The cover of the battery cell assembly provided in this application includes multiple support portions. When the cover is placed on the battery pack, the contact surfaces of the support portions abut against the battery cells, forming a rigid support system between the cover and the battery cells. This enables structural coupling between the cover and the battery cells, effectively improving the structural rigidity of the cover. This, in turn, diverts the cover's natural frequency away from the frequency band of excitation generated during vehicle operation, preventing resonance and abnormal noise between the cover and the vehicle body, thus improving the comfort of the vehicle ride. Furthermore, the support portions also enhance the stability and reliability of the cover, reducing the safety risks of the battery pack.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0021] Figure 1 This is a schematic diagram of the structure of the cover provided in one embodiment of this application;

[0022] Figure 2 for Figure 1 The illustrated embodiment provides a structural diagram of the cover when it is fitted onto the battery pack.

[0023] Figure 3 This is a schematic diagram of the structure of the cover provided in another embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the structure of the cover provided in another embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the structure of the cover provided in another embodiment of this application;

[0026] Figure 6 This is a schematic diagram showing the arrangement of the support portion of the cover according to an embodiment of this application;

[0027] Figure 7 This is a schematic diagram illustrating the arrangement of the support portion of the cover according to another embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the structure of a battery pack provided in one embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the structure of a battery pack provided in another embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the structure of a battery pack provided in another embodiment of this application. Detailed Implementation

[0031] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0033] The cover cell assembly and battery pack of the present application embodiment will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can complement or combine with each other.

[0034] During vehicle operation, uneven road surfaces and tire rolling generate vibration excitation, with the frequency of this vibration excitation mainly concentrated in the range of 0Hz to 30Hz. Since the battery pack cover has a low modal, when its natural frequency falls within the vibration excitation frequency range, the cover will resonate with the vehicle body, easily leading to abnormal noises, structural fatigue, and other adverse conditions.

[0035] This application provides a cover-type cell assembly for a battery pack. The cover-type cell assembly includes a cover and battery cells. Figure 1 and Figure 2 As shown, the cover 100 includes a cover plate 10 and a plurality of support portions 20 located on one side surface of the cover plate 10. Each support portion 20 is connected to the cover plate 10, and each support portion 20 has an abutment surface 201 at one end away from the cover plate 10, the abutment surface 201 being configured to abut against the battery cell 30 of the battery pack.

[0036] The cover 100 provided in the embodiments of this application includes multiple support portions 20. When the cover 100 is placed on the battery pack, the contact surface 201 of the support portion 20 abuts against the battery cell 30, forming a rigid support system of cover 10-support portion 20-battery cell 30. This enables structural coupling between the cover 100 and the battery cell 30, effectively improving the structural rigidity of the cover 100. This, in turn, adjusts the natural frequency of the cover 100 away from the frequency range of vibration excitation generated during vehicle operation, preventing resonance between the cover 100 and the vehicle body and thus avoiding abnormal noises, which is beneficial to improving the comfort of vehicle driving. Furthermore, the support portion 20 can also improve the stability and reliability of the cover 100, reducing the safety risks of the battery pack.

[0037] In one embodiment, such as Figure 1 As shown, the width of the support portion 20 remains constant from the cover plate 10 towards the abutment surface 201. The uniform width design of the support portion 20 allows for even load distribution and reduced deformation under external vibration or impact, preventing stress concentration or local buckling caused by cross-sectional changes. In some embodiments, such as... Figure 3 As shown, the cross-sectional shape of the support portion 20 can be, for example, rectangular.

[0038] In one embodiment, such as Figure 4 As shown, the width of the support portion 20 gradually decreases from the cover plate 10 towards the abutment surface 201. In the battery pack design, the terminal post 302 of the cell 30 is typically located at the top of the cell 30. The tapered structure design of the support portion 20 allows the support portion 20 to have a smaller volume near the abutment surface 201, providing more clearance for the cell's terminal post 302 and preventing direct contact between the support portion 20 and the terminal post 302 that could cause a short circuit. In some embodiments, the cross-sectional shape of the support portion 20 may be, for example, trapezoidal.

[0039] In one embodiment, such as Figure 1 and Figure 4 As shown, the support portion 20 has a hollow structure, meaning its interior is a cavity rather than a solid filling. This hollow design removes unnecessary materials from the support portion, significantly reducing the overall weight of the cover 100 while maintaining mechanical performance. It also helps reduce battery pack manufacturing costs and optimize vehicle energy consumption. The cross-sectional shape of the support portion 20 can be, for example, U-shaped or V-shaped. In some embodiments, the support portion 20 can be made of a porous material, such as foamed material, which can also effectively reduce the weight of the cover 100.

[0040] In one embodiment, such as Figure 5 As shown, the support portion 20 includes a connecting portion 21 and an abutting portion 22. The connecting portion 21 is connected to the cover plate 10, and the abutting portion 22 is located at the end of the connecting portion 21 away from the cover plate 10. The surface of the abutting portion 22 away from the cover plate 10 is the abutting surface 201. The width of the connecting portion 21 is smaller than the width of the abutting portion 22. The smaller width of the connecting portion 21 provides more clearance for the terminal post 302 of the battery cell, preventing the support portion 20 from directly contacting the terminal post 302 and causing a short circuit.

[0041] In some embodiments, such as Figure 5 As shown, the connecting part 21 is arranged perpendicularly to the cover plate 10, the abutting part 22 is arranged parallel to the cover plate 10, and the cross-sectional shape of the support part 20 can be, for example, T-shaped.

[0042] In one embodiment, such as Figure 6 As shown, multiple support portions 20 are arranged along a first direction X, each support portion 20 being an integral strip structure, and each support portion 20 extending along a second direction Y, where the first direction X intersects the second direction Y. The integral strip structure of the support portion 20 can be formed in a single process, which helps reduce the number of parts and lowers assembly complexity.

[0043] In one embodiment, such as Figure 7 As shown, multiple support portions 20 are arranged along a first direction X, and each support portion 20 includes multiple support members 202. Multiple support members 202 of the same support portion 20 are arranged at intervals along a second direction Y; the first direction X intersects the second direction Y. This arrangement helps to reduce the overall weight of the support portion 20, thereby reducing the weight of the cover 100.

[0044] In one embodiment, the first direction X is perpendicular to the second direction Y.

[0045] In one embodiment, the cover plate 10 has an insulating protective layer on the side of the support portion 20 and on the outer surface of the support portion 20. When the cover plate 10 and the support portion 20 are made of a metal or other material with good electrical conductivity, the insulating protective layer can form electrical isolation, preventing the terminal post 302 of the battery cell 30 from contacting the cover 100 and causing a short circuit.

[0046] This application also provides a battery pack, such as... Figure 8 and Figure 9 As shown, the battery pack includes a battery module 200, a housing 300, and the aforementioned cover cell assembly.

[0047] The battery module 200 is disposed within the housing 300. The battery module 200 includes a plurality of battery cells 30 arranged in parallel, and each battery cell 30 includes a housing 301. The cover 100 covers the opening of the housing 300, and the abutting surface of each support 20 abuts against the housing 301 of the battery cell 30.

[0048] In one embodiment, such as Figure 8 As shown, the battery cell 30 also includes two terminals 302 extending out of the housing 301. The plurality of support portions 20 include a plurality of first support portions 23, each of which abuts against the housing 301 of one of the battery cells 30, and the end of the first support portion 23 away from the cover plate 10 is located between the two terminals 302 of the same battery cell 30. The first support portions 23 not only enhance the structural rigidity of the cover plate 10 and prevent abnormal noise from the cover plate 10, but also provide a certain degree of support and fixation for the battery cell 30, ensuring that the battery cell 30 remains stable under extreme operating conditions.

[0049] In one embodiment, such as Figure 9 As shown, the plurality of support portions 20 include a plurality of second support portions 24. Each second support portion 24 simultaneously abuts against the housings 301 of two adjacent battery cells 30, and the end of the second support portion 24 away from the cover plate 10 is located between the terminals 302 of the two adjacent battery cells 30. The space between the terminals 302 of the two adjacent battery cells 30 is relatively large. The above-described arrangement of the second support portions 24 can prevent the second support portions 24 from contacting the terminals 302 of the battery cells 30, and facilitates meeting the electrical clearance requirements between the second support portions 24 and the terminals 302, providing a sufficient safety distance.

[0050] In one embodiment, such as Figure 10As shown, the plurality of support portions 20 include a plurality of first support portions 23 and a plurality of second support portions 24. Each first support portion 23 abuts against the housing 301 of one of the battery cells 30, and the end of the first support portion 23 away from the cover plate 10 is located between the two terminals 302 of the same battery cell 30. Each second support portion 24 abuts against the housing 301 of two adjacent battery cells 30, and the end of the second support portion 24 away from the cover plate 10 is located between the terminals 302 of the two adjacent battery cells 30. This arrangement is more conducive to enhancing the structural rigidity of the cover 100, improving the mechanical performance of the cover 100, and preventing the cover 100 from vibrating and causing abnormal noise.

[0051] In one embodiment, such as Figure 10 As shown, an adhesive layer 40 is provided between the contact surface 201 and the housing 301 of the battery cell 30. The adhesive layer 40 fills the tiny gap between the contact surface 201 and the housing 301, firmly connecting the support 20 and the battery cell 30, and preventing the support 20 and the battery cell 30 from shifting position under vibration or impact.

[0052] In one embodiment, the abutment surface 201 is provided with a plurality of microstructures, which are used to increase the surface roughness of the abutment surface 201. By increasing the surface area and roughness of the abutment surface 201, the microstructures can improve the mechanical anchoring effect between the adhesive layer 40 and the housing 301 of the battery cell, forming a tighter physical engagement and improving the bonding strength.

[0053] This application also provides a vehicle comprising an electric motor, a circuit system, and the aforementioned battery pack. The battery pack transmits electrical energy to the electric motor via the circuit system, and the electric motor converts the electrical energy into mechanical energy to drive the vehicle's wheels, thereby enabling the vehicle to move.

[0054] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery pack cover cell assembly, characterized in that, The cover-cell assembly includes a cover (100) and a cell (30); The cover (100) includes a cover plate (10) and a plurality of support portions (20) located on one side surface of the cover plate (10); each support portion (20) is connected to the cover plate (10), and each support portion (20) has an abutment surface (201) at one end away from the cover plate (10), the abutment surface (201) being configured to abut against the battery cell (30) of the battery pack.

2. The battery cell assembly according to claim 1, characterized in that, The width of the support portion (20) gradually decreases from the direction of the cover plate (10) toward the abutment surface (201); or, the width of the support portion (20) remains unchanged from the direction of the cover plate (10) toward the abutment surface (201).

3. The cover-body battery cell assembly according to claim 2, characterized in that, The support part (20) is a hollow structure.

4. The battery cell assembly according to claim 1, characterized in that, The support portion (20) includes a connecting portion (21) and an abutting portion (22). The connecting portion (21) is connected to the cover plate (10), and the abutting portion (22) is located at the end of the connecting portion (21) away from the cover plate (10). The surface of the abutting portion (22) away from the cover plate (10) is the abutting surface (201). The width of the connecting portion (21) is smaller than the width of the abutting portion (22).

5. The battery cell assembly according to claim 1, characterized in that, The plurality of support portions (20) are arranged along a first direction; each support portion (20) is an integral strip structure, and each support portion (20) extends along a second direction, the first direction intersecting the second direction.

6. The battery cell assembly according to claim 1, characterized in that, Multiple support portions (20) are arranged along a first direction; each support portion (20) includes multiple support members (202), and multiple support members (202) of the same support portion (20) are arranged at intervals along a second direction; the first direction intersects the second direction.

7. A battery pack, characterized in that, The battery pack includes a battery module (200), a housing (300), and a cover cell assembly as described in any one of claims 1 to 6; The battery module (200) is disposed inside the housing (300). The battery module (200) includes a plurality of parallel-arranged battery cells (30), each of the battery cells (30) including a housing (301). The cover covers the opening of the housing (300), and the contact surface (201) of each of the support parts (20) abuts against the housing (301) of the battery cell (30).

8. The battery pack according to claim 7, characterized in that, The battery cell (30) further includes two terminals (302) extending out of the housing (301); the plurality of support portions (20) include a plurality of first support portions (23); each first support portion (23) abuts against the housing (301) of one of the battery cells (30), and the end of the first support portion (23) away from the cover plate (10) is located between the two terminals (302) of the same battery cell (30); And / or, the plurality of support portions (20) include a plurality of second support portions (24), each of the second support portions (24) simultaneously abutting against the housing (301) of two adjacent cells (30), and the end of the second support portion (24) away from the cover plate (10) is located between the poles (302) of the two adjacent cells (30).

9. The battery pack according to claim 7, characterized in that, An adhesive layer (40) is provided between the contact surface (201) and the housing (301) of the battery cell (30).

10. The battery pack according to claim 9, characterized in that, The contact surface (201) is provided with a plurality of microstructures, which are used to increase the surface roughness of the contact surface (201).

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