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 first plastic, the first surface of cover plate body is protruding and forms the convex hull, and the convex hull is used for sticking cooling plate, first plastic sets up in the first surface of cover plate body, and first plastic has first through -hole, wherein, the convex hull is located in first through -hole, and the inner surface of first through -hole covers at least part of the side of convex hull, the utility model provides a cover plate subassembly to improve existing first plastic, realizes the insulation coverage of convex hull integration, eliminates the joint gap problem of many parts splicing, and simplifies assembly technology simultaneously.

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] As the basic building block of a battery pack, the structural design of the battery cell directly affects the overall performance and safety of the pack. In existing cell structures, the cover assembly is typically located at the opening of the cell casing to enclose the internal space of the cell and provide electrical connectivity. To meet heat dissipation requirements, the first surface of the cover assembly usually has an outwardly protruding bump structure. This bump is used to fit against a cooling plate, transferring the heat generated inside the cell to the cooling system through thermal conduction.

[0003] As electric vehicles increasingly demand higher energy density in their battery packs, the density of battery cells within the packs is increasing, while the spacing between adjacent cells is decreasing. In this tightly packed layout, the distance between the protrusions of adjacent cells is typically only a few millimeters. When the battery pack is subjected to external factors such as vibration, impact, or thermal expansion and contraction, these protrusions are highly susceptible to contact. Since these protrusions are usually made of conductive materials, direct contact between adjacent protrusions can create unintended electrical connections, potentially leading to safety hazards such as voltage imbalance between cells, abnormal discharge, or even short circuits.

[0004] To address the aforementioned issues, existing technologies typically employ an insulating protective structure around the bulge. A common approach is to attach individual insulating sheets or pads to each surface of the bulge, achieving comprehensive protection through a combination of multiple insulating components. However, this multi-component approach has significant technical drawbacks: First, gaps easily form at the joints between the insulating components, which may widen over long-term use due to thermal expansion and contraction or mechanical stress, creating weak points in the insulation. Second, the independent installation of multiple insulating components increases the complexity of the assembly process, making it difficult to guarantee assembly accuracy and increasing the risk of misalignment or detachment of insulating components. Third, the multi-component design increases material costs and inventory management burdens. Utility Model Content

[0005] This utility model provides a cover plate assembly and a battery cell. The cover plate assembly improves upon the existing first plastic to achieve integrated insulation coverage of the convex shroud, eliminating the gap problem of splicing multiple parts and simplifying the assembly process.

[0006] In a first aspect, the present invention provides a cover plate assembly, comprising: 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 a cooling plate; a first plastic material disposed on the first surface of the cover plate body, the first plastic material having a first through hole; wherein the convex bulge is located within the first through hole, and the inner surface of the first through hole covers at least a portion of the side surface of the convex bulge.

[0007] In one possible implementation, the side of the convex hull includes a first side extending along the length of the cover plate body; the inner surface of the first through hole includes a first inner surface extending along the length direction, the first inner surface covering at least a portion of the first side.

[0008] In one possible implementation, the side of the convex hull includes a second side extending along the width direction of the cover plate body; the inner surface of the first through hole includes a second inner surface extending along the width direction, the second inner surface covering at least a portion of the second side.

[0009] In one possible implementation, the thickness of the first plastic is equal to the thickness of the convex hull.

[0010] In one possible implementation, the first plastic component is a one-piece structure.

[0011] In one possible implementation, the first plastic includes: two mounting plates; two connecting strips extending along the length of the cover body, one end of the two connecting strips connecting to one of the mounting plates, and the other end of the two connecting strips connecting to the other mounting plate; wherein the two mounting plates and the two connecting strips form a first through hole.

[0012] In one possible implementation, the first surface has a bearing surface for accommodating the connecting strip, and the connecting strip is connected to the bearing surface.

[0013] In one possible implementation, the cover plate body is provided with two second through holes, and two mounting plates are respectively provided with third through holes coaxial with the second through holes; the cover plate assembly further includes: a second plastic material disposed on the side of the cover plate body away from the first surface, the second plastic material having two fourth through holes, and the two third through holes being coaxially disposed with the two second through holes respectively; and an electrode post that passes through the fourth through holes, the second through holes and the third through holes in sequence.

[0014] In one possible implementation, the mounting plate has a mounting groove on the side away from the first surface, and the cover plate assembly also includes a riveting block disposed in the mounting groove, the riveting block being connected to the pole post.

[0015] 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.

[0016] The cover assembly provided by this utility model includes a first plastic material disposed on the first surface of the cover body and having a first through hole. A protrusion is located within the first through hole, and the inner surface of the first through hole covers at least one side of the protrusion. By improving the structure of the first plastic material, the inner surface of the first through hole can cover the side of the protrusion, establishing an electrical isolation barrier between the side of the protrusion and the external environment. The geometric dimensions of the first through hole match the outer contour of the protrusion. When the protrusion is located within the first through hole, the inner surface of the through hole conforms to the side contour of the protrusion, forming an insulating covering layer that isolates the conductive area on the side of the protrusion, blocks the current conduction path, and prevents the side of the protrusion from making electrical contact with the protrusion of adjacent cells. In battery pack applications, when multiple cells are closely arranged and the distance between adjacent protrusions is small, the covering protection of the protrusion side by the inner surface of the first through hole can maintain the insulation interval under conditions of vibration, impact, or displacement caused by thermal expansion and contraction, avoiding electrical connection between adjacent protrusions and preventing voltage imbalance and abnormal discharge between cells. Existing technologies use multiple independent insulating sheets attached to each surface of the convex bulge. This easily leads to gaps at the joints between the insulating components, and the independent installation of multiple insulating components increases the complexity of the assembly process. This invention improves the structure of the first plastic component, creating an integrated insulating cover structure on the inner surface of the first through-hole. This eliminates the gap problem at the joints of multiple parts, avoids weak points in insulation caused by widening gaps, and, as the first plastic component is part of the cover plate assembly, eliminates the need for additional insulating components, simplifying the assembly process and reducing the requirements for assembly precision and the risk of misalignment or detachment of insulating components. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is an exploded structural diagram of a cover plate assembly provided by this utility model.

[0019] Figure 2 yes Figure 1 The diagram shows a three-dimensional structure of the cover plate assembly.

[0020] Figure 3 This is a three-dimensional structural diagram of a first plastic provided by this utility model.

[0021] Figure label: 1. Cover plate body; 11. First surface; 111. Bearing surface; 12. Protrusion; 121. First side surface; 122. Second side surface; 13. Second through hole; 2. First plastic part; 21. First through hole; 22. First inner surface; 23. Second inner surface; 24. Mounting plate; 241. Third through hole; 242. Mounting groove; 25. Connecting strip; 3. Second plastic part; 31. Fourth through hole; 4. Pole post; 5. Riveting block; 6. Sealing ring. Detailed Implementation

[0022] 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.

[0023] The following is combined with Figure 1-3 This utility model provides a cover plate assembly, including: a cover plate body 1, a first surface 11 of the cover plate body 1 protruding to form a convex 12, the convex 12 being used to fit a cooling plate; a first plastic 2, disposed on the first surface 11 of the cover plate body 1, the first plastic 2 having a first through hole 21; wherein, the convex 12 is located within the first through hole 21, and the inner surface of the first through hole 21 covers at least a portion of the side surface of the convex 12.

[0024] In this invention, a first plastic 2 is disposed on the first surface 11 of the cover plate body 1 and has a first through hole 21. A protrusion 12 is located inside the first through hole 21, and the inner surface of the first through hole 21 covers at least a portion of the side surface of the protrusion 12. By improving the structure of the first plastic 2, the inner surface of the first through hole 21 can cover the side surface of the protrusion 12, establishing an electrical isolation barrier between the side surface of the protrusion 12 and the external environment. The geometric dimensions of the first through hole 21 match the outer contour of the protrusion 12. When the protrusion 12 is located inside the first through hole 21, the inner surface of the through hole conforms to the side contour of the protrusion 12, forming an insulating covering layer that isolates the conductive area on the side surface of the protrusion 12, blocks the current conduction path, and prevents the side surface of the protrusion 12 from making electrical contact with the protrusion 12 of the adjacent battery cell. In battery pack applications, when multiple cells are closely arranged and the distance between adjacent protrusions 12 is small, the covering protection of the sides of the protrusions 12 by the inner surface of the first through hole 21 can maintain the insulation interval even when the protrusions 12 are displaced due to vibration, impact, or thermal expansion and contraction, thus avoiding electrical connections between adjacent protrusions 12 and preventing voltage imbalance and abnormal discharge between cells. Existing technology uses multiple independent insulating sheets attached to each surface of the protrusions 12, which easily leads to gaps at the joints between the insulating components, and the independent installation of multiple insulating components increases the complexity of the assembly process. This invention improves the structure of the first plastic 2, forming an integrated insulating covering structure on the inner surface of the first through hole 21, eliminating the gap problem at the joints of multiple parts, avoiding weak insulation links caused by widening gaps. Simultaneously, the first plastic 2, as a component of the cover assembly, eliminates the need for additional insulating components, simplifying the assembly process and reducing assembly precision requirements and the risk of misalignment and detachment of insulating components.

[0025] Specifically, the inner surface of the first through hole 21 covering at least a portion of the side surface of the convex hull 12 includes: the inner surface of the first through hole 21 completely covering at least one side surface of the convex hull 12; the inner surface of the first through hole 21 partially covering one or more sides surface of the convex hull 12; a portion of the inner surface of the first through hole 21 completely covering at least one side surface of the convex hull 12, and another portion covering a portion of the remaining sides surface of the convex hull.

[0026] The geometry of the through hole matches the outer contour of the convex hull 12. After the convex hull 12 is inserted into the first through hole 21, the inner surface of the through hole can closely fit the side contour of the convex hull 12. A continuous insulating covering layer is formed on the inner surface of the first through hole 21, which completely isolates the conductive area on the side of the convex hull 12 and blocks the current conduction path.

[0027] In one specific embodiment, when multiple cells are closely arranged in a battery pack, the distance between the protrusions 12 of adjacent cells is typically only a few millimeters. Under the vibration and impact of vehicle operation, the protrusions 12 are very likely to come into contact with each other. The inner surface of the first through hole 21 covers and protects the sides of the protrusions 12, maintaining an effective insulation gap even if the protrusions 12 undergo slight displacement or deformation, thus avoiding direct electrical connection between adjacent protrusions 12.

[0028] In related technologies, protection is typically achieved by placing multiple independent insulating pads or sleeves around the convex bulge 12. Each insulating component covers only a specific area of ​​the convex bulge 12, and multiple insulating components need to be spliced ​​together to form a complete protective layer. However, gaps often exist at the splicing points, creating weak points in the insulation. In this embodiment of the present invention, the inner surface of the first through hole 21 of the first plastic 2 forms an integrated insulating covering structure, eliminating the problem of splicing multiple parts, thus eliminating the insulation risk caused by gaps. At the same time, it simplifies the assembly process, requiring only the first plastic 2 to be installed as a whole to complete the insulation protection of the side of the convex bulge 12.

[0029] In some embodiments, the side of the convex bulge 12 includes a first side surface 121 extending along the length direction of the cover plate body 1; the inner surface of the first through hole 21 includes a first inner surface 22 extending along the length direction, the first inner surface 22 covering at least a portion of the first side surface 121.

[0030] In this invention, multiple battery cells are arranged along the width of the cover plate body 1. To ensure heat dissipation, the area of ​​the protrusions 12 is designed to be relatively large to increase the heat exchange area with the cooling plate. This results in the protrusions 12 of adjacent battery cells being close together, posing a risk of electrical contact. Multiple first through holes 21 are arranged along the width of the cover plate body 1, each corresponding to one protrusion 12. The inner surface of the first through hole 21 covers the side of its respective protrusion 12, establishing reliable insulation between adjacent protrusions 12. When the protrusions 12 are designed to be large to increase the heat dissipation area, the gap between adjacent protrusions 12 decreases. When the battery pack is subjected to vibration, impact, or thermal expansion and contraction caused by temperature changes, the protrusions 12 may experience slight displacement. In this case, the insulation covering of the side of the protrusion 12 by the inner surface of the first through hole 21 effectively prevents direct electrical contact between adjacent protrusions 12, avoiding the risk of short circuits caused by the close proximity of the protrusions 12, and ensuring electrical safety while pursuing heat dissipation performance.

[0031] Specifically, the first side surface 121 forms a continuous surface area along the length of the cover body 1, which typically faces the corresponding position of the adjacent cell in the battery pack assembly. The first inner surface 22, as part of the inner wall of the first through hole 21, has a geometry that matches the contour of the first side surface 121, and can completely cover the surface area of ​​the first side surface 121, forming an insulating layer between the first side surface 121 and the outside.

[0032] In one specific embodiment, the battery cells in the battery pack are typically arranged in rows along the width of the cover plate body 1. The distance between adjacent cells is limited by the battery pack space. To increase heat dissipation, the protrusions 12 of two cells need to be as close as possible in the length direction. The first inner surface 22 covering and protecting the first side surface 121 can provide a reliable insulation barrier at the location where adjacent cells are most likely to make electrical contact, and can maintain the necessary insulation distance even if the battery pack deforms under harsh operating conditions.

[0033] In related technologies, insulation protection along the length direction typically involves attaching a separate insulating strip to the first side 121. This insulating strip requires additional bonding or fixing processes and may detach or shift due to thermal expansion and contraction or mechanical stress during long-term use. However, in this embodiment of the present invention, the first inner surface 22, as part of the first through hole 21, forms an integral structure with the first plastic 2, preventing relative displacement or detachment and ensuring the long-term stability and reliability of the insulation protection.

[0034] In some embodiments, the side of the convex bulge 12 includes a second side 122 extending along the width direction of the cover body 1; the inner surface of the first through hole 21 includes a second inner surface 23 extending along the width direction, the second inner surface 23 covering at least a portion of the second side 122.

[0035] In this invention, the side of the protrusion 12 includes a second side 122 extending along the width direction of the cover plate body 1, and the inner surface of the first through hole 21 includes a second inner surface 23 extending along the width direction and the second inner surface 23 covers the second side 122, providing insulation protection for the protrusion 12 in the width direction, forming a complementary protection system with the protection in the length direction.

[0036] Specifically, the surface area formed by the second side 122 along the width direction of the cover plate body 1 is perpendicularly distributed to the first side 121, together constituting the main side area of ​​the convex 12. The second inner surface 23, as the extension of the inner wall of the first through hole 21 in the width direction, has a surface shape adapted to the second side 122, enabling it to closely contact the second side 122 and form a continuous insulating cover. The convex 12 has a rectangular structure, the first through hole 21 has a rectangular structure, the convex 12 is located inside the first through hole 21, the two first side surfaces 121 of the convex 12 are respectively attached to the two first inner surfaces 22 of the first through hole 21, and the two second side surfaces 122 are respectively attached to the two second inner surfaces 23 of the first through hole 21, achieving complete coverage of the convex 12 and improving the insulation effect.

[0037] In this embodiment of the utility model, the second inner surface 23 and the first inner surface 22 are both internal surface structures of the first through hole 21, which are achieved by integral molding of the first plastic 2. No additional positioning and fixing process is required, which simplifies the way to achieve insulation protection in the width direction.

[0038] In some embodiments, the thickness of the first plastic 2 is equal to the thickness of the convex bulge 12.

[0039] In this invention, the thickness of the first plastic 2 is equal to the thickness of the protrusion 12. This precise matching of thicknesses ensures a complete vertical correspondence between the first plastic 2 and the protrusion 12, guaranteeing that the inner surface of the first through hole 21 can fully cover the entire height range of the side of the protrusion 12, thus avoiding incomplete insulation coverage due to thickness mismatch. Specifically, the protrusion 12 protrudes outward from the first surface 11 of the cover plate body 1 to form a certain thickness. When the first plastic 2 is placed on the first surface 11, its thickness direction is consistent with the thickness direction of the protrusion 12. When the thickness of the first plastic 2 is equal to the thickness of the protrusion 12, the vertical coverage range of the inner surface of the first through hole 21 perfectly matches the height range of the side of the protrusion 12, achieving maximum coverage for side insulation protection.

[0040] In a specific embodiment, the thickness of the convex 12 is usually determined according to the heat dissipation requirements and structural strength requirements. When the thickness of the first plastic 2 is matched with it, it not only ensures complete insulation coverage of the side of the convex 12, but also avoids material waste and space occupation caused by excessive thickness design, so that the space utilization rate of the cover plate assembly in the battery pack is optimal.

[0041] In this embodiment of the invention, the design of equal thickness of the first plastic 2 and the convex bulge 12 achieves a precise correspondence between the insulation protection range and the protected object, ensuring the integrity of the insulation effect while optimizing space utilization efficiency.

[0042] In some embodiments, the first plastic 2 is a one-piece structure.

[0043] In this invention, the first plastic 2 is an integral structure, forming a unified insulating component through integral molding. This eliminates the connection gaps and assembly errors that may occur when multiple parts are combined, and improves the continuity of insulation protection and the overall strength of the structure.

[0044] Specifically, the one-piece structure means that all components of the first plastic 2 are formed simultaneously during the manufacturing process, without any subsequent splicing or assembly steps. As a component of the one-piece structure, the inner surface of the first through hole 21 forms a continuous and complete insulating interface without material interruptions or connecting seams, providing gapless insulating coverage to the sides of the bulge 12.

[0045] In one specific embodiment, the battery cell generates heat and undergoes thermal expansion and contraction during charging and discharging, while also being subjected to various mechanical stresses during transportation and use. The one-piece first plastic structure 2 has uniform material properties and a continuous geometry, which can maintain stable insulation performance and will not cause structural loosening or performance degradation due to temperature changes or mechanical stress.

[0046] In this embodiment of the utility model, the integrated first plastic 2 structure fundamentally avoids the reliability problem of connecting multiple parts, while simplifying the manufacturing process and assembly process, and improving the consistency of product quality and production efficiency.

[0047] In some embodiments, the first plastic 2 includes: two mounting plates 24; two connecting strips 25 extending along the length of the cover body 1, one end of the two connecting strips 25 being connected to one of the mounting plates 24, and the other end of the two connecting strips 25 being connected to the other mounting plate 24; wherein the two mounting plates 24 and the two connecting strips 25 form a first through hole 21.

[0048] In this utility model, the first plastic 2 includes two mounting plates 24 and two connecting strips 25. The two connecting strips 25 extend along the length of the cover plate body 1 and connect the two mounting plates 24. The enclosing structure of the mounting plates 24 and the connecting strips 25 forms the first through hole 21, thus realizing the design goals of functional zoning and structural optimization.

[0049] Specifically, the two mounting plates 24 are located at opposite ends of the length direction, providing a stable mounting base and support structure for the first plastic 2. The two connecting strips 25 extend along the length direction, their inner surfaces forming the boundary of the first through hole 21 in the length direction, and their outer surfaces contacting the first surface 11 of the cover plate body 1. The connection between the mounting plates 24 and the connecting strips 25 forms a stable frame structure, and the enclosed area is the first through hole 21 that accommodates the protrusion 12.

[0050] In one specific embodiment, the bulge 12 is typically arranged in a rectangular or elongated shape, with its length direction aligned with the length direction of the cover plate body 1. The extension design of the connecting strip 25 along its length direction matches the geometric features of the bulge 12, providing continuous insulation coverage for the long side of the bulge 12, while the mounting plate 24 provides insulation protection for the short side area, forming a complete insulating enclosure structure. This structure maximizes the area of ​​the bulge 12 while ensuring insulation of its sides, thereby improving the heat exchange effect with the cooling plate.

[0051] In this embodiment of the utility model, the mounting plate 24 and the connecting strip 25 are formed simultaneously as components of the integrated first plastic 2. The connection between the parts is a material body connection, which has the same strength characteristics as the substrate, thus avoiding the complexity and reliability issues of splicing connection.

[0052] In some embodiments, the first surface 11 has a bearing surface 111 for receiving the connecting strip 25, and the connecting strip 25 is connected to the bearing surface 111.

[0053] In this invention, the first surface 11 has a bearing surface 111 for accommodating the connecting strip 25 and the connecting strip 25 is connected to the bearing surface 111. The bearing surface 111 provides additional support and positioning foundation for the connecting strip 25, enhances the bonding strength between the connecting strip 25 and the cover plate body 1, and improves the stability of the first plastic 2 installation.

[0054] Specifically, the bearing surface 111, as a specific area of ​​the first surface 11, has a geometry that matches the bottom contour of the connecting strip 25, providing a close contact interface for the connecting strip 25. The connection between the connecting strip 25 and the bearing surface 111 can be achieved through adhesive bonding, heat fusion, mechanical fixing, etc. After connection, the connecting strip 25 receives a supporting reaction force from the bearing surface 111, enhancing its resistance to bending and torsion.

[0055] In one specific embodiment, the battery cell is subjected to pressure from the cooling plate and stress generated by thermal expansion and contraction during use. These forces are transmitted to the first plastic structure 2 through the protrusion 12. The supporting effect of the bearing surface 111 on the connecting strip 25 can effectively disperse and transmit these stresses, prevent the connecting strip 25 from deforming or breaking due to stress concentration, and ensure the stability of the shape of the first through hole 21.

[0056] In this embodiment of the utility model, the bearing surface 111 is configured to provide a dedicated support base for the connecting strip 25. Through structural optimization, the bearing capacity and installation stability of the first plastic 2 are improved, and the reliability of the insulation protection function is enhanced.

[0057] In some embodiments, the cover plate body 1 is provided with two second through holes 13, and the two mounting plates 24 are respectively provided with third through holes 241 coaxial with the second through holes 13; the cover plate assembly further includes: a second plastic 3, disposed on the side of the cover plate body 1 away from the first surface 11, the second plastic 3 having two fourth through holes 31, and the two third through holes 241 being coaxially disposed with the two second through holes 13 respectively; and a pole post 4, which sequentially passes through the fourth through holes 31, the second through holes 13 and the third through holes 241.

[0058] In this utility model, the cover plate body 1 is provided with two second through holes 13, the mounting plate 24 is provided with a third through hole 241 coaxial with the second through holes 13, the second plastic 3 is provided on the side of the cover plate body 1 away from the first surface 11 and has a fourth through hole 31 coaxial with the second through hole 13, and the pole post 4 passes through the fourth through hole 31, the second through hole 13 and the third through hole 241 in sequence. Through the coaxial configuration of the multi-layer through holes and the through connection of the pole post 4, the comprehensive functions of electrical connection, sealing and insulation are realized.

[0059] Specifically, the second through hole 13, the third through hole 241, and the fourth through hole 31 are located in the cover plate body 1, the mounting plate 24, and the second plastic 3, respectively, and the axes of the three through holes coincide to form a coaxial configuration. The electrode post 4, as a conductive element, passes through the three through holes in sequence. A sealing element can be provided between the inner wall of the through hole and the outer surface of the electrode post 4 to form a reliable sealed connection. The second plastic 3 and the first plastic 2 are located on both sides of the cover plate body 1, respectively, providing insulation protection for the entire connection area.

[0060] In some embodiments, the mounting plate 24 is provided with a mounting groove 242 on the side away from the first surface 11, and the cover plate assembly further includes a riveting block 5 disposed in the mounting groove 242, the riveting block 5 being connected to the pole post 4.

[0061] In this invention, a mounting groove 242 is provided on the side of the mounting plate 24 away from the first surface 11. A rivet block 5 is disposed within the mounting groove 242 and connected to the electrode post 4. Through the positioning of the rivet block 5 within the mounting groove 242 and its mechanical connection with the electrode post 4, reliable fixation and support are provided for the electrode post 4, enhancing the mechanical strength of the electrical connection. Specifically, the mounting groove 242, as a recessed structure of the mounting plate 24, provides accurate positioning space and a mounting foundation for the rivet block 5. After the rivet block 5 is embedded in the mounting groove 242, it obtains lateral constraint, preventing lateral displacement under external force. The connection between the rivet block 5 and the electrode post 4 can be achieved through riveting, welding, or threaded connection, forming a strong mechanical bond capable of withstanding various stresses generated during the use of the battery cell.

[0062] In one specific embodiment, the battery cell experiences internal pressure changes during charge-discharge cycles and is subjected to external mechanical loads during transportation and installation. These forces act on the connection of the terminal post 4. The rivet block 5, through the constraint of the mounting groove 242 and its secure connection with the terminal post 4, effectively transmits and disperses these stresses, preventing loosening or breakage at the connection of the terminal post 4.

[0063] In this embodiment of the utility model, the design of the riveting block 5 and the mounting groove 242 provides a special mechanical fixing structure for the pole post 4. The structured connection method significantly improves the connection strength and ensures the stability and reliability of the electrical connection in long-term use.

[0064] In some embodiments, a sealing ring 6 is also included, which is sleeved on the pole post 4 and abuts against the side of the second plastic 3 away from the cover plate body 1, thereby improving the sealing performance.

[0065] 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.

[0066] In this utility model, the battery cell includes a housing, an electrode assembly, and a cover plate assembly. The cover plate assembly is located at the opening of the housing. By adopting a cover plate assembly with an integrated first plastic 2 insulation structure, the battery cell's sealing, electrical connection, and insulation protection functions are integrated, thereby improving the overall performance and application safety of the battery cell product.

[0067] Specifically, the cavity of the housing is used to accommodate the electrode assembly, and the opening is a channel connecting the cavity to the outside. After the cover plate assembly is installed at the opening, it not only seals the cavity, but its integrated first plastic 2 structure also provides reliable insulation protection for the convex 12. The electrode post 4 achieves electrical conduction between the inside and outside of the cell through the connection of multiple through holes.

[0068] In one specific embodiment, the battery cell, as the basic unit of the battery pack, needs to meet the safety requirements of battery pack integration while ensuring its own performance. The integrated insulation design of the cover assembly makes it possible for the battery cells to be closely arranged in the battery pack. Even if adjacent cells are very close, electrical interference can be avoided through the insulation protection of the first plastic 2, thereby improving the energy density and safety of the battery pack.

[0069] 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.

[0070] 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 first plastic material is disposed on the first surface of the cover plate body, and the first plastic material has a first through hole; The convex bulge is located within the first through hole, and the inner surface of the first through hole covers at least a portion of the side surface of the convex bulge.

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 direction of the cover plate body; The inner surface of the first through hole includes a first inner surface extending along the length direction, the first inner surface covering at least a portion of the first side surface.

3. The cover plate assembly according to claim 1, characterized in that, The side of the convex bulge includes a second side extending along the width direction of the cover plate body; The inner surface of the first through hole includes a second inner surface extending in the width direction, the second inner surface covering at least a portion of the second side surface.

4. The cover plate assembly according to any one of claims 1-3, characterized in that, The thickness of the first plastic is equal to the thickness of the convex bulge.

5. The cover plate assembly according to any one of claims 1-3, characterized in that, The first plastic is a one-piece structure.

6. The cover plate assembly according to claim 5, characterized in that, The first plastic includes: Two mounting plates; Two connecting strips extend along the length of the cover plate body, one end of the two connecting strips is connected to one of the mounting plates, and the other end of the two connecting strips is connected to the other mounting plate; The two mounting plates and the two connecting strips together form the first through hole.

7. The cover plate assembly according to claim 6, characterized in that, The first surface has a bearing surface for accommodating the connecting strip, and the connecting strip is connected to the bearing surface.

8. The cover plate assembly according to claim 6, characterized in that, The cover plate body is provided with two second through holes, and the two mounting plates are respectively provided with third through holes coaxial with the second through holes; the cover plate assembly further includes: The second plastic is disposed on the side of the cover plate body away from the first surface. The second plastic has two fourth through holes and two third through holes respectively coaxially disposed with the two second through holes. The pole passes through the fourth through hole, the second through hole, and the third through hole in sequence.

9. The cover plate assembly according to claim 8, characterized in that, The mounting plate has a mounting groove on the side away from the first surface, and the cover plate assembly also includes a riveting block disposed in the mounting groove, the riveting block being connected to the pole post.

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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