Cover plate assembly

Abstract

The utility model relates to battery technical field, the utility model provides a cover plate subassembly, include: cover plate body, be equipped with first mounting hole on the cover plate body, pole, including pole body, first board and second board, pole body is worn in first mounting hole, first board and second board are separately located in the both ends of pole body, first plastic piece, the sleeve is located pole body, and is located between first board and cover plate body, and, sealing ring, the sleeve is located pole body, and is located between second board and cover plate body, wherein, the support height H1 of first plastic piece to first board is 0.7mm 2mm, and the support length L1 of first plastic piece to first board is 0.6 2mm, the cover plate subassembly provided by the utility model aims at solving the unreasonable part arrangement of cover plate subassembly in traditional technology, the problem of insufficient size utilization.

Description

Technical Field

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

[0002] With the increasing maturity of lithium-ion battery technology, lithium-ion batteries are widely used as power batteries in the field of electric vehicles. The structural components of lithium-ion batteries are also an important part of lithium-ion power batteries. They not only ensure the safety and reliability of lithium-ion batteries, but also take care of the connection between the internal chemical system of lithium-ion batteries and external modules.

[0003] In the existing technology, the cell cover plate has many parts, and the parts need to be installed together. However, the arrangement and size design of the cover plate parts in the existing technology are unreasonable, resulting in poor space utilization of the cover plate and high overall height of the terminal post, which in turn affects the overall size of the finished battery. Utility Model Content

[0004] This utility model provides a cover plate assembly, which aims to solve the problems of unreasonable part arrangement and insufficient size utilization in the traditional cover plate assembly.

[0005] To address the problems existing in the prior art, this utility model provides a cover plate assembly, comprising: A cover plate, wherein the cover plate is provided with a first mounting hole; The electrode post includes an electrode post body, a first plate and a second plate. The electrode post body is inserted through the first mounting hole, and the first plate and the second plate are respectively disposed at both ends of the electrode post body. A first plastic component is fitted onto the pole body and located between the first plate and the cover plate; and, A sealing ring is fitted onto the pole body and located between the second plate and the cover plate body; Wherein, the support height H1 of the first plastic part to the first plate is 0.7mm-2mm, and the support length L1 of the first plastic part to the first plate is 0.6-2mm.

[0006] According to the present invention, the overlap length L2 between the first plate and the cover plate in the length direction of the cover plate is 0.8-3mm.

[0007] According to the present invention, a cover plate assembly is provided, wherein the first plate body and the pole body are connected by a radius (R-angle) transition, and the inner ring of the first plastic part has a chamfer, the chamfer corresponding to the radius (R-angle).

[0008] According to the present invention, a cover plate assembly is provided on the cover plate, a second mounting hole is provided on the periphery of the second mounting hole, and an explosion-proof valve is provided on the annular boss.

[0009] According to the present invention, the height H2 of the annular boss is greater than or equal to 3mm.

[0010] According to the cover plate assembly provided by this utility model, the distance L3 between the outer edge of the annular boss and the inner edge of the second mounting hole is 0.1mm-3mm.

[0011] According to the present invention, a cover plate assembly is provided, the cover plate includes a cover plate body and a second plastic part, the cover plate body is provided with a first sub-mounting hole, and the second plastic part is provided with a corresponding second sub-mounting hole, the diameter of the first sub-mounting hole is smaller than the diameter of the second sub-mounting hole; The upper end of the second sub-mounting hole is provided with a support portion, which extends into the second sub-mounting hole. One end of the support portion abuts against the second plate body, and the other end abuts against the cover plate body.

[0012] According to the present invention, the thickness D of the cover plate body in contact with the support portion along the thickness direction of the cover plate body is greater than or equal to 0.7 mm.

[0013] According to the present invention, a cover plate assembly is provided, wherein the second plastic part is provided with a slot, the slot is located on the side of the second mounting hole, the cover plate body is provided with a rib, the rib is engaged with the slot; the length L4 of the rib extending into the slot along the thickness direction of the cover plate body is 0.3mm-0.6Hmm, where H is the thickness of the cover plate body.

[0014] According to the present invention, the height H3 of the pole protruding from the cover plate body along the thickness direction of the cover plate body is 1.5-4mm.

[0015] The cover plate assembly provided by this utility model is designed so that the support height H1 of the first plastic part to the first plate is 0.7mm-2mm and the support length L1 of the first plate is 0.6-2mm. On the one hand, it can ensure the strength of the first plastic part, so that the first plastic part is not easy to crack after the pole post is riveted; on the other hand, it can also reduce the height of the pole post while ensuring strength, so that the cover plate arrangement is more compact. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the disassembled structure of the cover plate assembly provided by this utility model; Figure 2 yes Figure 1 A sectional view of the structure; Figure 3 yes Figure 2 A partial structural diagram.

[0018] Reference numerals: 1. Cover plate; 11. Cover plate body; 12. Second plastic part; 13. First mounting hole; 131. First sub-mounting hole; 132. Second sub-mounting hole; 14. Second mounting hole; 15. Annular boss; 16. Support part; 17. Slot; 18. Rib; 2. Pole post; 21. First plate; 22. Second plate; 23. Pole post body; 24. R-angle; 3. First plastic part; 31. Chamfer; 4. Sealing ring; 5. Explosion-proof valve; 51. Explosion-proof valve diaphragm. Detailed Implementation

[0019] 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.

[0020] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0021] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0025] The following is combined with Figures 1-3 This invention describes the cover plate assembly provided by this utility model.

[0026] In view of the problems of unreasonable component arrangement and insufficient size utilization in the traditional technology, this utility model provides a cover plate assembly, including a cover plate body 1, an pole post 2, a first plastic part 3 and a sealing ring 4.

[0027] Please see Figure 1The cover plate 1 has a first mounting hole 13. The pole post 2 includes a pole post body 23, a first plate 21, and a second plate 22. The pole post body 23 passes through the first mounting hole 13, and the first plate 21 and the second plate 22 are respectively disposed at both ends of the pole post body 23. The first plate 21 and the second plate 22 can be formed by protruding outward from the side wall of the pole post body 23, so that the axial surface of the pole post 2 is formed into a structure similar to the "I". In an optional embodiment, the first plate 21 and / or the second plate 22 protruding relative to the pole post body 23 can be formed by a stamping process after passing through the first mounting hole 13 to achieve outward expansion relative to the side wall of the pole post body 23; in another optional embodiment, the first plate 21 and / or the second plate 22 are formed as a separate structure, and the first plate 21 and / or the second plate 22 are assembled to the end of the pole post body 23 after the pole post body 23 passes through the first mounting hole 13.

[0028] The first plastic component 3 is sleeved on the electrode body 23 and located between the first plate 21 and the cover plate 1. The sealing ring 4 is sleeved on the electrode body 23 and located between the second plate 22 and the cover plate 1. Specifically, in the thickness direction of the cover plate body 1, the sealing ring 4 is sandwiched between the cover plate 1 and the second plate 22, and the first plastic component 3 is sandwiched between the first plate 21 and the cover plate 1. In this way, the cover plate 1 can apply a force to the sealing ring 4 toward the second plate 22, causing the sealing ring 4 to compress.

[0029] Furthermore, the support height H1 of the first plastic part 3 on the first plate 21 is 0.7mm-2mm, and the support length L1 of the first plastic part 3 on the first plate 21 is 0.6-2mm. If the support height and length are too small, the first plastic part 3 may crack after the first plate 21 is riveted. If the support height and length are too large, it will affect the height of the pole post 2, thus increasing the cost. By setting a suitable support height and support length in this utility model, on the one hand, the strength of the first plastic part 3 can be guaranteed, making it less likely to crack after the pole post 2 is riveted; on the other hand, the height of the pole post 2 can be reduced while ensuring strength, making the cover plate arrangement more compact.

[0030] Furthermore, the overlap length L2 between the first plate 21 and the cover plate 1 along the length direction is 0.8-3mm. With this arrangement, the cover plate 1 can provide further support for the first plastic part 3 and the first plate 21. When the pole post 2 is subjected to a large force, the first plastic part 3 is less likely to crack, thus ensuring the stability and integrity of the structure.

[0031] Since both the first plastic component 3 and the sealing ring 4 need to be fitted onto the pole body 23, in order to prevent interference between the various structures, the technical solution provided in this utility model is described in detail below. Figure 2 and Figure 3The first plate 21 and the pole body 23 are connected by a radius (R) angle 24, which ensures a smooth connection between them, preventing corner damage or interference with the installation of other components. Furthermore, the inner ring of the first plastic part 3 has a chamfer 31, corresponding to the radius (R) angle 24. The space between the chamfer 31 and the radius (R) angle 24 effectively prevents interference during installation between the first plastic part 3 and the first plate 21, making the installation of the first plastic part 3 more convenient, quick, and stable. Even further, to facilitate the installation of the sealing ring 4, the inner ring of the sealing ring 4 also has a chamfer 31.

[0032] The cover plate assembly generally also requires an explosion-proof valve 5 to prevent explosion caused by excessive internal pressure of the battery. In the technical solution provided by this utility model, the cover plate 1 is provided with a second mounting hole 14, and an annular boss 15 is provided around the second mounting hole 14. The annular boss 15 is covered with an explosion-proof valve 5, and the explosion-proof valve 5 is covered with an explosion-proof valve membrane 51. The setting of the annular boss 15 creates a height difference between the explosion-proof valve 5 and the upper end surface of the cover plate 1, which can prevent electrolyte leakage and contamination of the explosion-proof valve 5. The explosion-proof valve membrane 51 also provides further protection for the explosion-proof valve 5. Preferably, the height H2 of the annular boss 15 is greater than or equal to 3mm.

[0033] Furthermore, if the distance between the annular boss 15 and the second mounting hole 14 is too small, it may cause micro-cracks in the forming of the cover plate 1; if the distance between the annular boss 15 and the second mounting hole 14 is too large, it will affect the size design of the explosion-proof valve 5. In the technical solution provided by this utility model, the distance L3 between the outer edge of the annular boss 15 and the inner edge of the second mounting hole 14 is 0.1mm-3mm.

[0034] Specifically, the cover plate 1 includes a cover plate body 11 and a second plastic part 12 that are detachably connected vertically. The cover plate body 11 has a first sub-mounting hole 131, and the second plastic part 12 has a corresponding second sub-mounting hole 132. The first sub-mounting hole 131 and the second sub-mounting hole 132 are concentrically arranged, together forming the first mounting hole 13. The diameter of the first sub-mounting hole 131 is smaller than the diameter of the second sub-mounting hole 132. Further, a support portion 16 is provided at the upper end of the second sub-mounting hole 132, extending into the second sub-mounting hole 132 in a hook shape. One end of the support portion 16 abuts against the second plate 22, and the other end abuts against the cover plate body 11. Thus, through the support portion 16, the cover plate body 11 can be connected to the second plastic part 12, and the cover plate body 11 can also be connected to the second plate 22.

[0035] Furthermore, the thickness of the cover plate body 11 in contact with the support portion 16 is greater than or equal to 0.7 mm. The cover plate body 11 comprises two parts: one part contacts the support portion 16, and the other part is located on the lower side and snaps into the second plastic part 12. The part in contact with the support portion 16 needs to be riveted to the first plate 21 during assembly; therefore, the thickness should not be set too large or too small. If it is too small, it will affect the structural strength; if it is too large, it will affect the height of the pole post 2.

[0036] Specifically, the second plastic part 12 is provided with a slot 17, which is located on the side of the second mounting hole 132. The cover plate body 11 is provided with a rib 18, which engages with the slot 17 to form a detachable connection between the first plate 21 and the second plastic part 12. Further, the length L4 of the rib 18 extending into the slot 17 is 0.3mm-0.6Hmm, where H is the thickness of the cover plate body 11. This design prevents relative rotation between the cover plate body 11 and the second plastic part 12, resulting in higher structural stability. Furthermore, the height H3 of the electrode post 2 protruding from the cover plate body 11 is 1.5-4mm. Setting the height of the electrode post 2 within a suitable range ensures a smaller overall height of the cover plate assembly, facilitating subsequent battery assembly.

[0037] This utility model also provides a battery, including the cover assembly described above. Based on this, this utility model also provides an automobile, including the battery described above. Since the main utility model feature lies in the cover assembly, the structures of the battery and the automobile will not be described in detail.

[0038] 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, wherein the cover plate is provided with a first mounting hole; The electrode post includes an electrode post body, a first plate and a second plate. The electrode post body is inserted through the first mounting hole, and the first plate and the second plate are respectively disposed at both ends of the electrode post body. A first plastic component is fitted onto the pole body and located between the first plate and the cover plate; and, A sealing ring is fitted onto the pole body and located between the second plate and the cover plate body; Wherein, the support height H1 of the first plastic part to the first plate is 0.7mm-2mm, and the support length L1 of the first plastic part to the first plate is 0.6-2mm.

2. The cover plate assembly according to claim 1, characterized in that, The overlap length L2 between the first plate and the cover plate in the longitudinal direction is 0.8-3 mm.

3. The cover plate assembly according to claim 1, characterized in that, The first plate and the pole body are connected by a radius (R-angle), and the inner ring of the first plastic part has a chamfer, which corresponds to the radius (R-angle).

4. The cover plate assembly according to claim 1, characterized in that, The cover plate is provided with a second mounting hole, and an annular boss is provided on the periphery of the second mounting hole. An explosion-proof valve is provided on the annular boss.

5. The cover plate assembly according to claim 4, characterized in that, The height H2 of the annular boss is greater than or equal to 3mm.

6. The cover plate assembly according to claim 4, characterized in that, The distance L3 between the outer edge of the annular boss and the inner edge of the second mounting hole is 0.1mm-3mm.

7. The cover plate assembly according to claim 1, characterized in that, The cover plate includes a cover plate body and a second plastic part. The cover plate body has a first sub-mounting hole, and the second plastic part has a corresponding second sub-mounting hole. The diameter of the first sub-mounting hole is smaller than the diameter of the second sub-mounting hole. The upper end of the second sub-mounting hole is provided with a support portion, which extends into the second sub-mounting hole. One end of the support portion abuts against the second plate body, and the other end abuts against the cover plate body.

8. The cover plate assembly according to claim 7, characterized in that, The thickness D of the cover plate body in contact with the support part along the thickness direction of the cover plate body is greater than or equal to 0.7 mm.

9. The cover plate assembly according to claim 7, characterized in that, The second plastic part is provided with a slot, which is located on the side of the second mounting hole. The cover plate body is provided with a rib, which is engaged with the slot. The length L4 of the rib extending into the slot along the thickness direction of the cover plate body is 0.3mm-0.6Hmm, where H is the thickness of the cover plate body.

10. The cover plate assembly according to claim 1, characterized in that, The height H3 of the pole protruding from the cover plate body along the thickness direction is 1.5-4mm.

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