Cover plate assembly and battery cell

Abstract

The utility model relates to battery technology field especially, and more particularly relates to a cover plate subassembly and electric core, the utility model provides a cover plate subassembly including cover plate body and top patch, the first surface of cover plate body is protruding and forms the convex hull, and the convex hull is used for sticking the cooling plate, the top patch, the top patch covers the surface of convex hull, and the edge portion of top patch is bent to the first surface, and forms the covering portion, and the covering portion covers at least one side surface of convex hull, the utility model provides a cover plate subassembly and can realize the continuous insulation protection to the convex hull top surface and side surface, eliminates the seam gap of many parts splicing, simplifies the assembly technology and improves the insulation reliability.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cover plate assembly and a battery cell. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage systems, lithium-ion battery technology is becoming increasingly mature, and the requirements for battery performance and safety are constantly increasing. In a battery system, the cell, as the core energy storage unit, has a structural design that directly affects the performance of the entire battery pack.

[0003] A battery cell typically consists of a casing, electrode assembly, and cover plate assembly. The cover plate assembly not only needs to seal the inside of the cell but also needs to perform multiple functions such as heat dissipation and electrical connection. To improve the heat dissipation efficiency of the cell, existing technologies often incorporate a convex structure on the cover plate. This convex structure can directly contact the external cooling plate, forming an effective heat conduction path to quickly transfer the heat generated inside the cell to the cooling system.

[0004] However, in practical applications, especially in environments with densely packed battery packs, the electrical safety issues of convex structures are becoming increasingly prominent. Because convex structures are typically made of conductive materials and are directly connected to the electrical system inside the battery cell, their surfaces have a certain potential. When multiple battery cells are closely arranged, the distance between the convex structures of adjacent cells is very short. When the battery pack is subjected to external factors such as vibration, impact, or thermal expansion and contraction, adjacent convex structures can easily come into direct electrical contact, leading to accidental short circuits between the cells and causing safety accidents.

[0005] In existing technologies, to solve the insulation problem of convex bulges, multiple independent insulating components are typically installed around the bulge. For example, an insulating gasket is placed on the top surface of the bulge, and insulating strips or sleeves are installed on each side. While this multi-component insulation solution can provide a certain degree of electrical isolation, it has significant technical drawbacks: it is difficult to achieve perfect alignment between multiple independent insulating components, easily resulting in gaps at the joints and creating weak points in the insulation; the assembly process for multiple components is complex, requiring the individual installation of each insulating component, leading to low assembly efficiency and susceptibility to inconsistent assembly quality due to human error; and the independent insulating components may shift or detach during long-term use, affecting the continuity of the insulation effect. Utility Model Content

[0006] This utility model provides a cover plate assembly and a battery cell. The cover plate assembly can achieve continuous insulation protection for the top and side surfaces of the convex hull, eliminate the gaps between the joints of multiple parts, simplify the assembly process, and improve the insulation reliability.

[0007] This utility model provides a cover plate assembly, including: a cover plate body, a first surface of the cover plate body protruding to form a convex hull, the convex hull being used to fit a cooling plate; a top patch, the top patch covering the surface of the convex hull, the edge of the top patch being bent toward the first surface to form a covering portion, the covering portion covering at least one side of the convex hull.

[0008] In one possible implementation, the side of the convex hull includes a first side extending along the length direction of the cover plate body, and the cover portion includes a first cover portion covering the first side.

[0009] In one possible implementation, the width of the first covering portion is equal to the width of the first side surface.

[0010] In one possible implementation, the side of the convex hull includes a second side extending along the width direction of the cover plate body, and the cover portion includes a second cover portion covering the second side.

[0011] In one possible implementation, the width of the second covering portion is equal to the width of the second side.

[0012] In one possible implementation, the end of the first covering portion is connected to the end of the second covering portion.

[0013] In one possible implementation, the top patch is a flexible insulating film that is fixedly connected to the convex hull by an adhesive.

[0014] In one possible implementation, the cover plate body is provided with two first through holes, and the protrusion is located between the two first through holes. The cover plate assembly further includes: a first plastic material disposed on the side of the cover plate body away from the first surface, the first plastic material having two second through holes, the two second through holes being coaxially disposed with the two first through holes respectively; two second plastic materials disposed on the first surface of the cover plate body respectively, each second plastic material having a third through hole coaxial with the corresponding first through hole; and a pole post that sequentially passes through the second through holes, the first through holes, and the third through holes.

[0015] In one possible implementation, a sealing ring is also included, which is fitted around the outer periphery of the pole and abuts against the bottom of the first plastic.

[0016] Secondly, this utility model provides a battery cell, comprising: a housing having a cavity and an opening communicating with the cavity; an electrode assembly disposed within the cavity of the housing; and the aforementioned cover plate assembly disposed at the opening of the housing.

[0017] The cover plate assembly provided by this utility model covers the surface of a raised bump with a top patch. The top patch bends towards the first surface to form a covering portion, which covers at least one side of the raised bump. Thus, a single top patch simultaneously provides insulation protection for both the top and side surfaces of the raised bump. After the top patch covers the raised bump surface, its flexible edge material can be bent and deformed along the geometric contour of the raised bump towards the first surface of the cover plate body. During the bending process, it gradually conforms to the side surface of the raised bump, forming a continuous covering structure. This covering portion is in close contact with the side surface of the raised bump, establishing an effective insulation barrier between the side surface of the raised bump and the external environment. The top patch not only covers the top surface of the raised bump but also extends to cover the side surface area, forming an integrated insulating protective layer, effectively preventing electrical exposure of the side surface of the raised bump. Compared to existing technologies that use multiple independent insulating components to cover different surfaces of the convex battery pack, this invention's single top patch structure eliminates the gap problem caused by splicing multiple parts. Because the top patch itself is a continuous, monolithic material, there is no interruption in material distribution during its coverage from the top to the sides, avoiding the creation of weak points in insulation. Simultaneously, the single-component design significantly simplifies the assembly process; only a single installation of the top patch is needed to complete insulation protection for multiple surfaces of the convex battery pack, improving assembly efficiency and consistency, and reducing potential quality instability issues arising from assembling multiple parts. Furthermore, the integrated structure of the top patch prevents the relative displacement or detachment that can occur with independent insulating components during long-term use, ensuring the continuity and reliability of insulation protection, thus effectively solving the electrical safety problems of convex batteries in densely packed battery pack environments. Attached Figure Description

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

[0019] Figure 1 This is an exploded structural diagram of a cover plate assembly provided by this utility model.

[0020] Figure 2 yes Figure 1 A three-dimensional structural diagram of the cover plate assembly shown.

[0021] Figure 3 This is a schematic diagram of the structure of a top patch provided by this utility model.

[0022] Figure 4 This is a schematic diagram of the unfolded structure of a top patch provided by this utility model.

[0023] Figure label: 1. Cover plate body; 11. First surface; 12. Protrusion; 13. First side surface; 14. Second side surface; 15. First through hole; 2. Top patch; 21. First cover; 22. Second cover; 3. First plastic part; 31. Second through hole; 4. Second plastic part; 41. Third through hole; 5. Pole post; 6. Sealing ring; 7. Riveting block. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The following is combined Figure 1-4 This utility model provides a cover plate assembly, including a cover plate body 1 and a top patch 2, wherein: The first surface 11 of the cover plate body 1 protrudes and forms a protrusion 12, which is used to fit the cooling plate.

[0026] The top patch 2 covers the surface of the convex hull 12, and the edge of the top patch 2 is bent toward the first surface 11 to form a covering portion, which covers at least one side of the convex hull 12.

[0027] In this invention, a top patch 2 is applied to the surface of the convex bulge 12, with its edges bent towards the first surface 11 to form a covering portion. This covering portion covers at least one side of the convex bulge 12, thus achieving simultaneous insulation protection for both the top and side surfaces of the convex bulge 12 using a single top patch 2. After the top patch 2 covers the surface of the convex bulge 12, its flexible edge material can be bent and deformed along the geometric contour of the convex bulge 12 towards the first surface 11 of the cover plate body 1. During the bending process, it gradually conforms to the side surface of the convex bulge 12, forming a continuous covering structure. This covering portion is in close contact with the side surface of the convex bulge 12, establishing an effective insulation barrier between the side surface of the convex bulge 12 and the external environment. The top patch 2 not only covers the top surface of the convex bulge 12 but also extends to cover the side surface area, forming an integrated insulating protective layer that effectively prevents electrical exposure of the side surface of the convex bulge 12. Compared to existing technologies that use multiple independent insulating components to cover different surfaces of the protrusion 12, the single top patch 2 structure of this invention eliminates the gap problem caused by splicing multiple parts. Because the top patch 2 is a continuous, integral material, there is no interruption in material distribution during its coverage from the top to the sides, avoiding weak points in insulation. Simultaneously, the single-component design significantly simplifies the assembly process; only a single installation of the top patch 2 is needed to complete insulation protection for multiple surfaces of the protrusion 12, improving assembly efficiency and consistency, and reducing potential quality instability issues arising from multi-component assembly. Furthermore, the integrated structure of the top patch 2 prevents relative displacement or detachment that can occur with independent insulating components during long-term use, ensuring the continuity and reliability of insulation protection, thus effectively solving the electrical safety problem of the protrusion 12 in environments with densely packed battery packs.

[0028] Specifically, after the top patch 2 covers the surface of the convex hull 12, its edge material has sufficient ductility to bend and deform along the contour of the convex hull 12 towards the first surface 11. During the bending process, the edge of the top patch 2 gradually conforms to the side of the convex hull 12, forming a continuous covering structure. The covering is in close contact with the side of the convex hull 12, establishing an insulating barrier between the convex hull 12 and the outside world.

[0029] In one specific embodiment, when multiple cells are closely arranged within the battery pack, the distance between the protrusions 12 of adjacent cells is very close, and electrical contact can easily occur if there is no insulation protection on the sides of the protrusions 12. The covering portion formed by bending the edge of the top patch 2 can effectively isolate adjacent protrusions 12, prevent accidental conduction caused by vibration or thermal expansion and contraction, and ensure the electrical safety of the battery pack under various operating conditions.

[0030] In related technologies, side insulation is typically achieved by setting multiple independent insulating pads or insulating strips around the convex bulge 12. This method requires the coordinated installation of multiple parts, resulting in a complex assembly process and potential gaps between the insulating components, affecting the continuity of insulation. However, in this embodiment, the top patch 2 is bent to form a covering portion, achieving simultaneous coverage of multiple surfaces of the convex bulge 12 with a single component. This eliminates the gap problems associated with assembling multiple parts, simplifies the assembly process, and improves the reliability and consistency of insulation protection.

[0031] In some embodiments, the side of the convex bulge 12 includes a first side 13 extending along the length direction of the cover body 1, and the covering portion includes a first covering portion 21 covering the first side 13.

[0032] In this invention, the side of the convex bulge 12 includes a first side 13 extending along the length of the cover body 1, and the covering part includes a first covering part 21 covering the first side 13. By specifically setting the first covering part 21 to cover the side along the length direction, the key position with the smallest spacing between adjacent cells in the battery pack can be protected, effectively preventing the risk of electrical series connection along the length direction.

[0033] Specifically, the first side surface 13 serves as the sidewall of the protrusion 12 along its length and typically faces the adjacent cell protrusion 12 in the battery pack layout. The first cover portion 21 extends from the edge of the top patch 2, and its geometry matches that of the first side surface 13, allowing it to completely conform to the surface contour of the first side surface 13. The insulating material of the first cover portion 21 forms an electrical isolation layer between the first side surface 13 and the outside world.

[0034] In one specific embodiment, in the battery pack of an electric vehicle, the cells are densely arranged along their length, with the distance between the first sides 13 of the protrusions 12 of adjacent cells being only a few millimeters. When vibration or collision occurs during vehicle operation, the first sides 13 of adjacent protrusions 12 are most likely to come into contact. The placement of the first cover 21 in this most dangerous location provides a reliable insulation barrier, preventing accidental short circuits between the cells.

[0035] In some embodiments, the width of the first cover portion 21 is equal to the width of the first side portion 13.

[0036] In this invention, the width of the first covering part 21 is equal to the width of the first side 13. Through precise matching of dimensions, the first side 13 is completely covered without any omissions, ensuring the integrity of the insulation protection, while avoiding material waste and assembly interference caused by over-coverage.

[0037] Specifically, the width of the first covering portion 21 refers to its vertical dimension, and the width of the first side surface 13 refers to its vertical dimension. When the widths of the two are equal, the first covering portion 21 can precisely cover the entire area of ​​the first side surface 13, with aligned boundaries, leaving no uncovered gaps and producing no excess overhangs.

[0038] In one specific embodiment, when assembling the cover plate assembly on an automated production line, the width matching between the first cover portion 21 and the first side surface 13 ensures the consistency and repeatability of the assembly. The operating equipment can perform precise positioning according to preset dimensional parameters, avoiding errors caused by manual adjustments and improving production efficiency and product quality stability.

[0039] Optionally, the width of the first covering part 21 may be greater than the width of the first side 13, so that the first covering part 21 can not only fully cover the first side 13, but also extend to the first surface 11 to cover part of the first surface 11 of the cover body 1, thereby improving the insulation effect between two adjacent cover bodies.

[0040] In some embodiments, the side of the convex bulge 12 includes a second side 14 extending in the width direction of the cover body 1, and the cover includes a second cover 22 covering the second side 14.

[0041] In this utility model, the side of the protrusion 12 includes a second side 14 extending along the width direction of the cover plate body 1, and the covering part includes a second covering part 22 covering the second side 14. By adding the second covering part 22, the side in the width direction is insulated and protected, forming a complementary protection system with the first covering part 21, thereby expanding the insulation coverage range of the side of the protrusion 12.

[0042] Specifically, the second side 14 serves as the sidewall of the protrusion 12 in the width direction, and its orientation is perpendicular to the first side 13. The second cover 22 is formed by bending from the other side region of the top patch 2, and its extension direction is arranged along the width direction. The insulating material of the second cover 22 is bonded to the surface of the second side 14, establishing electrical isolation in that direction. The first cover 21 and the second cover 22 work together to provide insulation protection for the protrusion 12 in both main lateral directions.

[0043] In one specific embodiment, in the battery module of the energy storage system, the cells not only need to consider the insulation between adjacent cells in the length direction, but also need to prevent accidental contact with other electrical components in the module, such as busbars, monitoring harnesses, etc. The provision of the second cover 22 in the width direction provides an additional insulation barrier, ensuring the safety of the bulge 12 in complex electrical environments.

[0044] In some embodiments, the width of the second cover portion 22 is equal to the width of the second side portion 14.

[0045] In this invention, the width of the second covering part 22 is equal to the width of the second side 14, which continues the design concept of precise matching, ensures complete coverage of the second side 14, and forms a unified design standard with the size control of the first covering part 21, thereby improving the coordination and standardization of the entire covering system.

[0046] Specifically, the width of the second cover 22 refers to its vertical dimension. By precisely corresponding to the width of the second side 14, the second cover 22 can perfectly fit the geometric contour of the second side 14. This dimensional matching ensures complete insulation of the area of ​​the second side 14, avoiding problems of insufficient or excessive coverage that may be caused by dimensional deviations.

[0047] In one specific embodiment, during the mass production of the battery pack, both the first cover 21 and the second cover 22 employ the same precise matching design principle, resulting in a well-standardized production process. Quality inspectors can use uniform inspection standards and methods to ensure that the cover quality of each product meets design requirements, thereby improving the efficiency of production management.

[0048] Optionally, the width of the second covering portion 22 may be greater than the width of the second side 14, so that the second covering portion 22 can not only fully cover the second side 14, but also extend to the first surface 11 to cover part of the first surface 11.

[0049] In some embodiments, the end of the first cover portion 21 is connected to the end of the second cover portion 22.

[0050] In this invention, the end of the first covering part 21 is connected to the end of the second covering part 22, forming a continuous covering structure. This eliminates any gaps that may exist between the two covering parts, achieving seamless insulation protection on the side of the convex bulge 12 and improving the integrity of the overall insulation system.

[0051] Specifically, the first cover 21 and the second cover 22 meet at the corner region of the convex hull 12, and their ends are connected by material continuation or overlap. The connecting area forms a continuous insulating layer without any interruption in the insulating material. The connection between the first cover 21 and the second cover 22 results in a continuous annular insulating protection from the first side 13 to the second side 14.

[0052] In related technologies, it is difficult to achieve perfect alignment of multiple independent insulating covers during installation, and seams or gaps often exist between the covers. These weak points can easily become the starting point of insulation failure during long-term use. However, in this embodiment of the invention, the connection between the ends of the first cover 21 and the second cover 22 eliminates the seams and gaps, forming a continuous insulating barrier, avoiding the generation of local insulation weak points, and significantly improving the reliability and service life of the insulation system.

[0053] In some embodiments, the top patch 2 is a flexible insulating film, which is fixedly connected to the protrusion 12 by an adhesive.

[0054] In this invention, the top patch 2 is a flexible insulating film, which is fixedly connected to the protrusion 12 by an adhesive. The use of flexible material gives the top patch 2 good bending deformation ability and can adapt to the process requirements of edge bending. The adhesive connection method provides reliable fixing strength and ensures the positional stability of the top patch 2 during use.

[0055] Specifically, the flexible insulating film possesses a certain elastic modulus and ductility, allowing it to undergo plastic deformation without cracking under bending forces. Adhesive is applied to the contact interface between the top patch 2 and the convex bulge 12, achieving a strong bond between the two through intermolecular adhesion. After curing, the adhesive forms a stable adhesive layer capable of withstanding certain shear and tensile stresses.

[0056] In related technologies, insulating covers are often made of rigid materials, which are prone to stress concentration and cracking in applications requiring bending, affecting the durability of the insulation effect. Mechanical fixing methods such as bolt connections increase assembly complexity and cost. However, in this embodiment of the invention, the flexible insulating film material overcomes the bending limitations of rigid materials, and the adhesive connection method simplifies the assembly process. The combination of the two achieves good process adaptability and reliability, providing the optimal material and connection solution for the bending application of the top patch 2.

[0057] In some embodiments, the cover plate body 1 is provided with two first through holes 15, and the protrusion 12 is located between the two first through holes 15. The cover plate assembly further includes: a first plastic 3, disposed on the side of the cover plate body 1 away from the first surface 11, the first plastic 3 having two second through holes 31, the two second through holes 31 being coaxially disposed with the two first through holes 15 respectively; two second plastics 4, respectively disposed on the first surface 11 of the cover plate body 1, each second plastic 4 having a third through hole 41 coaxial with the corresponding first through hole 15; and a pole post 5, which sequentially passes through the second through hole 31, the first through hole 15 and the third through hole 41.

[0058] In this utility model, the cover plate body 1 is provided with two first through holes 15, the protrusion 12 is located between the two first through holes 15, the first plastic 3 is provided on the side of the cover plate body 1 away from the first surface 11 and has two second through holes 31 coaxial with the first through holes 15 respectively, and two second plastic 4 are respectively provided on the first surface 11 of the cover plate body 1 and each has a third through hole 41 coaxial with the corresponding first through hole 15. The pole post 5 passes through the second through hole 31, the first through hole 15 and the third through hole 41 in sequence. Through this multi-layer through structure configuration, the reliable passage of the pole post 5 and multiple sealing preparations are realized. At the same time, the central arrangement of the protrusion 12 optimizes the heat dissipation effect.

[0059] Specifically, the distribution of the two first through holes 15 on the cover plate body 1 leaves a complete space in the middle area for the protrusion 12, allowing the protrusion 12 to fully utilize this area for heat dissipation contact. The second through hole 31 of the first plastic 3 is coaxial with the first through hole 15, ensuring the alignment accuracy of the pole post 5 during penetration. The third through hole 41 of the second plastic 4 is also coaxial with the corresponding first through hole 15, forming a precise alignment of the three layers of through holes. During penetration, the pole post 5 passes through each layer of structure along a predetermined axial path.

[0060] In this embodiment of the utility model, by arranging the protrusion 12 between the two first through holes 15, a reasonable division of labor and space optimization of heat dissipation function and electrical connection function are achieved. The multi-layer coaxial through hole structure ensures the accuracy of the pole post 5 installation and provides a complete structural foundation for building a high-performance cell cover plate.

[0061] In some embodiments, it further includes: a sealing ring 6, which is fitted onto the outer periphery of the pole post 5 and abuts against the bottom of the first plastic 3.

[0062] In this invention, the sealing ring 6 is sleeved on the outer periphery of the electrode post 5 and abuts against the bottom of the first plastic 3. The sealing ring 6 forms a radial sealing interface between the electrode post 5 and the first plastic 3, which effectively prevents the electrolyte from leaking through the electrode post 5, and improves the sealing reliability and safety of the battery cell.

[0063] Specifically, the sealing ring 6 is made of an elastic material with a certain degree of compressive deformation capability. After the sealing ring 6 is fitted onto the outer circumference of the pole post 5, its inner diameter forms an interference fit with the outer diameter of the pole post 5, generating radial clamping force. The lower end face of the sealing ring 6 forms an axial abutment with the bottom of the first plastic 3, generating axial sealing force through elastic deformation. The dual sealing effect of radial and axial forces forms a reliable sealing barrier.

[0064] In this embodiment of the invention, the sealing ring 6 forms a multiple sealing mechanism through radial engagement with the electrode post 5 and axial contact with the first plastic 3, which improves the redundancy and reliability of the sealing system. Even if a certain sealing interface becomes slightly loose, the other interfaces can still maintain the overall sealing effect, greatly reducing the risk of electrolyte leakage.

[0065] In some embodiments, a riveting block 7 is also included, wherein an installation groove is provided on the top of the second plastic 4, the riveting block 7 is located in the installation groove, and is welded and fixed to the pole post 5.

[0066] This utility model provides a battery cell, comprising: a housing having a cavity and an opening communicating with the cavity; an electrode assembly disposed within the cavity of the housing; and the aforementioned cover plate assembly disposed at the opening of the housing.

[0067] In this utility model, the battery cell includes a housing with a cavity and an opening communicating with the cavity, an electrode assembly disposed in the cavity of the housing, and a cover plate assembly as claimed in the preceding claims disposed at the opening of the housing. By applying the cover plate assembly with the convex hull 12 and the top patch 2 insulation structure to the battery cell product, the sealing, heat dissipation and insulation functions of the battery cell are integrated, thereby improving the overall performance and application value of the battery cell product.

[0068] Specifically, the opening in the casing provides a channel for the insertion of the electrode assembly and the injection of electrolyte. After the cover assembly is installed, the opening is closed, forming a sealed internal environment for the cell. The protrusion 12 structure of the cover assembly extends from the inside of the cell to the outer surface, establishing a heat conduction channel between the cell and the external cooling system. The insulation protection function of the top patch 2 ensures the electrical safety of the cell within the battery pack. The electrode assembly is connected to the external circuit through the terminal posts 5, enabling the cell to charge and discharge.

[0069] In related technologies, the heat dissipation, insulation, and sealing functions of a battery cell often require separate specialized components, such as independent heat sinks, insulating pads, and sealing caps, which increases the number of components and assembly complexity. However, in this embodiment of the invention, the cover plate assembly integrates a heat dissipation protrusion 12, an insulating top patch 2, and a sealing structure, achieving multiple functions in a single component. This reduces the number of components, simplifies the design of the battery cell and battery pack, lowers manufacturing costs, and improves product integration and competitiveness.

[0070] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications 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 utility model.

Claims

1. A cover plate assembly, characterized in that, include: A cover plate body, wherein a first surface of the cover plate body protrudes and forms a convex bulge, the convex bulge being used to fit the cooling plate; A top patch covers the surface of the convex hull, the edge of the top patch is bent toward the first surface to form a covering portion, the covering portion covering at least one side of the convex hull.

2. The cover plate assembly according to claim 1, characterized in that, The side of the convex bulge includes a first side extending along the length of the cover plate body, and the covering portion includes a first covering portion covering the first side.

3. The cover plate assembly according to claim 2, characterized in that, The width of the first covering part is equal to the width of the first side.

4. The cover plate assembly according to claim 2, characterized in that, The side of the convex bulge includes a second side extending along the width direction of the cover plate body, and the covering portion includes a second covering portion covering the second side.

5. The cover plate assembly according to claim 4, characterized in that, The width of the second covering part is equal to the width of the second side.

6. The cover plate assembly according to claim 5, characterized in that, The end of the first covering part is connected to the end of the second covering part.

7. The cover plate assembly according to any one of claims 1-6, characterized in that, The top patch is a flexible insulating film, which is fixedly connected to the convex bulge by adhesive.

8. The cover plate assembly according to any one of claims 1-6, characterized in that, The cover plate body is provided with two first through holes, the protrusion is located between the two first through holes, and the cover plate assembly further includes: A first plastic material is disposed on the side of the cover plate body away from the first surface. The first plastic material has two second through holes, which are respectively coaxially arranged with the two first through holes. Two second plastics are respectively disposed on the first surface of the cover plate body, and each second plastic has a third through hole coaxial with the corresponding first through hole; The pole passes through the second through hole, the first through hole, and the third through hole in sequence.

9. The cover plate assembly according to claim 8, characterized in that, Also includes: A sealing ring is fitted onto the outer periphery of the pole post and abuts against the bottom of the first plastic.

10. A battery cell, characterized in that, include: A housing having a cavity and an opening communicating with the cavity; The electrode assembly is disposed within the cavity of the housing; The cover assembly as described in any one of claims 1-9 is disposed at the opening of the housing.

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