Cover plate assembly, battery and vehicle

Abstract

A cover plate assembly (1), a battery (1000) and a vehicle (2000). The cover plate assembly (1) comprises a cover plate body (10), a pole post (50), a pressing assembly (600), an insulating member (60), and a sealing member (40). The cover plate body (10) comprises a pole post hole (20) and a first position-limiting portion (11) extending from an inner wall of the pole post hole (20) to the center, the pole post (50) being inserted into the pole post hole (20), and the corresponding insulating member (60) being disposed between the pole post (50) and the inner wall of the pole post hole (20). The sealing member (40) is disposed between a fixing member (30) and the pole post (50), and is attached to the pole post (50). The pressing assembly (600) is fixedly connected to the cover plate body (10), and abuts against the sealing member (40) in a first direction, so that the pressing component (600) and the pole post (50) can compress the sealing member (40) in the first direction, thereby achieving a better sealing effect.

Description

Cover assembly, battery and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on October 31, 2023, with application number 202322946114.2 and titled “Cover assembly, battery and vehicle,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of battery technology, and in particular, to a cover plate assembly, a battery, and a vehicle. Background Art

[0004] In the related art, a battery cover and a battery are provided, wherein an injection-molded rubber portion is filled between the pole and the cover body as a seal to achieve sealing of the pole and the cover. However, the injection molding process is relatively difficult to operate, and improper operation may easily cause the compression of the seal to increase or decrease, thereby affecting the sealing between the pole and the cover body.

[0005] Summary of the Invention

[0006] The purpose of the present disclosure is to provide a cover plate assembly, a battery and a vehicle, wherein the cover plate assembly can control the compression amount of the seal to achieve a better sealing effect, thereby at least partially solving the above-mentioned technical problems.

[0007] In order to achieve the above objectives, the present disclosure provides a cover plate assembly in a first aspect, comprising:

[0008] The cover plate body includes a pole hole and a first limiting portion extending from the inner wall of the pole hole toward the center of the pole hole;

[0009] A pole, plugged into the pole hole;

[0010] an insulating member, provided between the pole and the inner wall of the pole hole;

[0011] a crimping assembly, fixedly connected to the cover body and spaced apart from the first limiting portion in the first direction; and

[0012] A sealing member is provided between the crimping assembly and the pole and is attached to the pole;

[0013] The insulating member abuts against the first limiting portion and the pole in the first direction respectively, and the crimping assembly abuts against the sealing member in the first direction, so that the crimping assembly and the pole compress the sealing member in the first direction.

[0014] Optionally, the sealing member includes a first sealing surface for abutting and sealing against the pole and a second sealing surface for abutting and sealing against the crimping assembly, and an area of ​​the first sealing surface is smaller than an area of ​​the second sealing surface.

[0015] Optionally, the seal includes a first sealing portion and a second sealing portion connected in the first direction, the first sealing portion abuts against the side of the pole in the first direction to form the first sealing surface, and the second sealing portion abuts against the side of the crimping assembly in the first direction to form the second sealing surface; and / or

[0016] The sealing member further includes a third sealing surface formed between the first sealing surface and the second sealing surface, wherein the third sealing surface abuts against a bottom surface of the insulating member.

[0017] Optionally, the first sealing portion and the second sealing portion are configured as a stepped structure.

[0018] Optionally, there is an expansion space between the first sealing portion and the insulating member; and

[0019] An expansion space is defined between the second sealing portion and the inner wall of the pole hole.

[0020] Optionally, the crimping assembly also includes an insulating partition, which is fixedly connected to the cover body, and a first through hole corresponding to the pole hole is provided on the insulating partition, and a protrusion is provided circumferentially of the first through hole, and the protrusion is inserted between the pole and the inner wall of the pole hole, and the top surface of the protrusion abuts against the seal in the first direction.

[0021] Optionally, the crimping assembly further includes a fixing member, the fixing member is located between the protrusion and the inner wall of the pole hole, the fixing member is fixedly connected to the inner wall of the pole hole, and the fixing member abuts against the sealing member in the first direction.

[0022] Optionally, the cover plate assembly further includes a lead-out plate, the lead-out plate includes a second through hole sleeved on the pole, and the pole is fixedly connected to the lead-out plate.

[0023] Optionally, the pole includes a first stop surface and a second stop surface arranged opposite to each other in the first direction, and the insulating member includes a first limit surface and a second limit surface arranged opposite to each other in the first direction;

[0024] The first limiting surface abuts against the first limiting portion in the first direction, the second limiting surface abuts against the first stop surface in the first direction, and the second stop surface abuts against the first sealing surface, so as to limit the movement of the pole in the first direction.

[0025] Optionally, the cover plate assembly further includes:

[0026] A first circumferential locking structure is used to lock the circumferential rotation between the insulating member and the first limiting portion; and / or

[0027] The second circumferential locking structure is used to lock the circumferential rotation between the insulating member and the pole.

[0028] Optionally, the first circumferential locking structure includes a first protrusion and a first slot, one of the first protrusion and the first slot is provided on the first limiting portion, and the other is provided on the insulating member, and the first protrusion is plugged into the first slot to limit the insulating member from rotating circumferentially along the pole hole;

[0029] The second circumferential locking structure includes a second protrusion and a second slot, one of the second protrusion and the second slot is provided on the insulating member, and the other is provided on the pole, and the second protrusion is inserted into the second slot to limit the circumferential rotation of the pole along the insulating member.

[0030] Optionally, the number of the first protrusions and the number of the first slots are both plural, one of which is provided at intervals along the circumference of the first limiting portion, and the other is provided at intervals along the circumference of the insulating member;

[0031] There are a plurality of second protrusions and a plurality of second slots, one of which is arranged on the insulating member at intervals along the circumferential direction of the insulating member, and the other is arranged on the pole at intervals along the circumferential direction of the pole.

[0032] Optionally, the pole hole is configured as a circular hole, an elliptical hole, or a waist-shaped hole.

[0033] A second aspect of the present disclosure provides a battery, comprising the above-mentioned cover plate assembly.

[0034] A third aspect of the present disclosure provides a vehicle comprising the above-mentioned battery.

[0035] Through the above technical solution, the cover plate assembly includes a cover plate body, a pole, a crimping assembly, an insulating member and a sealing member. The cover plate body has a pole hole, and the cover plate body is formed with a first limiting portion extending from the inner wall of the pole hole toward the center of the pole hole. The pole is inserted into the pole hole, and the insulating member is arranged between the pole and the inner wall of the pole hole to limit the upward movement of the pole along the first direction. The sealing member is arranged between the crimping assembly and the pole for sealing, and the sealing member is attached to the pole. The fixing member and the first limiting portion are spaced apart in the first direction, the crimping assembly is fixedly connected to the cover plate body, and the crimping assembly abuts against the sealing member in the first direction, so that the crimping assembly and the pole can compress the sealing member in the first direction, so that the sealing performance of the sealing member is better. Compared with the seal formed by injection molding to seal between the pole and the cover plate, the crimping assembly and the pole clamp the seal to compress the seal to form a seal, and the compression amount of the seal is relatively easier to control to achieve better sealing.

[0036] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0038] FIG1 is an overall exploded schematic diagram of a cover plate assembly provided in an exemplary embodiment of the present disclosure.

[0039] FIG2 is a schematic diagram of a three-dimensional structure of a pole provided in an exemplary embodiment of the present disclosure.

[0040] FIG3 is a cross-sectional view of the pole taken along line AA in FIG2 .

[0041] FIG. 4 is a perspective schematic diagram of an insulating member provided in an exemplary embodiment of the present disclosure.

[0042] FIG. 5 is a schematic BB cross-sectional view of an insulating member provided in an exemplary embodiment of the present disclosure.

[0043] FIG. 6 is a schematic perspective view of a sealing member provided in an exemplary embodiment of the present disclosure.

[0044] FIG. 7 is a CC cross-sectional schematic diagram of a sealing member provided in an exemplary embodiment of the present disclosure.

[0045] FIG. 8 is a top view of a cover body provided in an exemplary embodiment of the present disclosure.

[0046] FIG. 9 is a cross-sectional view of a cover plate assembly provided in an exemplary embodiment of the present disclosure.

[0047] FIG10 is a partial enlarged view of D in FIG9 .

[0048] FIG. 11 is a cross-sectional view of another cover plate assembly provided in an exemplary embodiment of the present disclosure.

[0049] FIG12 is a partial enlarged view of E in FIG11 .

[0050] FIG. 13 is an exploded view of the overall structure of a cover plate assembly provided in another embodiment.

[0051] FIG. 14 is an exploded view of a battery provided in an exemplary embodiment of the present disclosure.

[0052] FIG. 15 is a schematic structural diagram of a vehicle provided in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0054] In this disclosure, for the convenience of description, an X-direction is established for the cover assembly. The X-direction is the first direction, and the direction indicated by the arrow is upward along the first direction, that is, the direction in which the pole is removed from the pole hole to the cover body, and vice versa, it is downward along the first direction. Unless otherwise specified, the directional words used, such as "inside" and "outside", refer to the inside and outside of the outline of the component or structure itself. "First", "second", etc. are used to distinguish one element from another and do not have order or importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0055] A reliable seal is required between the electrode and the cover of the secondary battery. Otherwise, the seal between the electrode and the cover may fail, causing leakage of substances in the secondary battery or entry of external air, water, and other substances into the secondary battery, thereby affecting the performance of the secondary battery.

[0056] As shown in Figures 1 to 13, the first aspect of the present disclosure provides a cover assembly 1, which includes a cover body 10, a pole 50, a crimping assembly 600, an insulating member 60, and a sealing member 40. The cover body 10 has a pole hole 20, and the cover body 10 is formed with a first limiting portion 11 extending from the inner wall of the pole hole 20 toward the center of the pole hole 20. The pole 50 is inserted into the pole hole 20, and the insulating member 60 is arranged between the pole 50 and the inner wall of the pole hole 20 to limit the upward movement of the pole 50 along the first direction X. The sealing member 40 is arranged between the crimping assembly 600 and the pole 50 for sealing, and the sealing member 40 is attached to the pole 50. The crimping assembly 600 is spaced apart from the first limiting portion 11 in the first direction X. The crimping assembly 600 is fixedly connected to the cover body 10 and abuts against the seal 40 in the first direction X. This allows the crimping assembly 600 and the terminal 50 to compress the seal 40 in the first direction X, thereby improving the sealing performance of the seal 40. Compared to injection molding to form a seal between the terminal 50 and the cover, the crimping assembly 600 and the terminal 50 clamp the seal 40 to compress the seal 40, and the compression of the seal 40 is relatively easier to control, thereby achieving a better seal.

[0057] In the above embodiment, the seal 40 is prefabricated and can be made of rubber. It is placed between the crimping assembly 600 and the terminal 50. The crimping assembly 600 and the terminal 50 are squeezed to compress the seal 40, thereby achieving a seal between the terminal 50 and the cover body 10. The amount of compression of the seal 40 in the first direction X is controlled by the size of the gap between the crimping assembly 600 and the terminal 50.

[0058] In addition, the first limiting portion 11 and the insulating member 60 provided between the first limiting portion 11 and the pole 50 can limit the upward movement of the pole 50 along the first direction X, and the crimping assembly 600 and the sealing member 40 provided between the crimping assembly 600 and the pole 50 can limit the downward movement of the pole 50 along the first direction X. The first limiting portion 11, the insulating member 60, the sealing member 40 and the crimping assembly 600 cooperate with each other to limit the movement of the pole 50 in the first direction X.

[0059] As shown in Figures 1 to 10, in some embodiments, the crimping assembly 600 may include an insulating spacer 70 and a fixing member 30. The insulating spacer 70 is disposed on the cover body 10 and is fixedly connected to the cover body 10. The insulating spacer 70 is provided with a first through hole 71 corresponding to the pole hole 20. A protrusion 72 is provided circumferentially around the first through hole 71. The protrusion 72 is inserted between the pole 50 and the inner wall of the pole hole 20. The top surface of the protrusion 72 abuts against the sealing member 40 in the first direction X. A gap is formed between the protrusion 72 and the inner wall of the pole hole 20. The fixing member 30 is located in the gap between the protrusion 72 and the inner wall of the pole hole 20. The fixing member 30 is fixedly connected to the inner wall of the pole hole 20 and abuts against the sealing member 40 in the first direction X. The fixing member 30 , the protrusion 72 and the pole 50 work together to compress the sealing member 40 , so that the sealing member 40 has a better sealing effect.

[0060] In some embodiments, the cover body 10 and the fixing member 30 may be made of aluminum or an aluminum alloy to facilitate welding with the cover body 10 .

[0061] In addition, the sealing member 40 may be made of rubber. The insulating member 60 , the sealing member 40 , the insulating partition 70 and the protruding portion 72 of the insulating partition 70 enclose the fixing member 30 to insulate the fixing member 30 from the pole 50 .

[0062] As shown in Figures 2 to 10, in some embodiments, an insulating member 60 is sleeved on the pole 50 and has a first limiting surface 63 and a second limiting surface 64 disposed opposite each other in the first direction X. The pole 50 includes a main body 51 and a protrusion 52 disposed around the main body 51. The top surface of the protrusion 52 in the first direction X serves as a first stop surface 521, and the bottom surface of the protrusion 52 in the first direction X serves as a second stop surface 522. The first limiting surface 63 of the insulating member 60 abuts against the first limiting portion 11 in the first direction, and the second limiting surface 64 of the insulating member 60 abuts against the first stop surface 521 in the first direction X, thereby limiting the upward movement of the pole 50 in the first direction.

[0063] In addition, the seal 40 is configured as an annular sealing ring and is sleeved on the main body 51 of the pole 50. The seal 40 may include a first sealing surface 411 and a second sealing surface 421. The first sealing surface 411 of the seal 40 abuts the pole 50. Specifically, the first sealing surface 411 abuts the second stop surface 522 on the pole 50. The second sealing surface 421 abuts the fixing member 30 and the top surface of the raised portion 72 to limit the downward movement of the pole 50 in the first direction X. The first limiting portion 11, the insulating member 60, the seal 40, the raised portion 72, and the fixing member 30 cooperate to limit the movement of the pole 50 in the first direction X.

[0064] As shown in Figures 4 to 10, in some embodiments, the insulating member 60 includes a first insulating portion 61 and a second insulating portion 62, wherein the first insulating portion 61 is connected to the second insulating portion 62 and overlaps the second insulating portion 62. The sealing member 40 is sleeved on the pole 50, with the first insulating portion 61 located between the first limiting portion 11 and the main body 51 of the pole 50 in the radial direction of the pole hole 20, and the second insulating portion 62 located between the inner wall of the pole hole 20 and the protrusion 52 in the radial direction of the pole hole 20. The connection between the first insulating portion 61 and the second insulating portion 62 covers the first stop surface 521, thereby isolating the pole 50 from the inner wall of the pole hole 20 and the first limiting portion 11. At the same time, in the radial direction of the pole hole 20, the inner wall of the pole hole 20 and the first limiting portion 11 abut against the outer peripheral wall of the insulating member 60, and the inner peripheral wall of the insulating member 60 abuts against the pole 50, which can limit the movement of the pole 50 in the radial direction of the pole hole 20.

[0065] In some embodiments, the cover plate assembly 1 further includes a first circumferential locking structure 400 and a second circumferential locking structure 500. The first circumferential locking structure 400 is used to lock the circumferential rotation between the insulating member 60 and the first limiting portion 11, and the second circumferential locking structure 500 is used to lock the circumferential rotation between the insulating member 60 and the pole 50, so as to lock the pole 50 from rotating circumferentially along the pole hole 20.

[0066] In some embodiments, the first circumferential locking structure 400 includes a first protrusion 402 and a first slot 401, one of the first protrusion 402 and the first slot 401 is provided on the first limiting portion 11, and the other is provided on the insulating member 60, and the first protrusion 402 is inserted into the first slot 401 to limit the circumferential rotation of the insulating member 60 along the pole hole 20.

[0067] The second circumferential locking structure 500 includes a second protrusion 502 and a second slot 501. One of the second protrusion 502 and the second slot 501 is provided on the insulating member 60, and the other is provided on the pole 50. The second protrusion 502 is inserted into the second slot 501 to limit the pole 50 from rotating circumferentially along the insulating member 60.

[0068] To more securely prevent the pole 50 from rotating circumferentially along the pole hole 20, multiple first protrusions 402, first slots 401, second protrusions 502, and second slots 501 may be provided. One of the multiple first protrusions 402 and the multiple first slots 401 is spaced apart along the circumference of the first limiting portion 11 on the first limiting portion 11, and the other is spaced apart along the circumference of the insulating member 60 on the insulating member 60. The multiple first protrusions 402 and the multiple first slots 401 cooperate to more securely connect the insulating member 60 to the first limiting portion 11, thereby further securing the insulating member 60 from rotating circumferentially along the pole hole 20. In addition, one of the multiple second protrusions 502 and the multiple second slots 501 is arranged on the insulating member 60 at intervals along the circumference of the insulating member 60, and the other is arranged on the pole 50 at intervals along the circumference of the pole 50, so that the insulating member 60 is more firmly connected to the first limiting portion 11, thereby making the locking of the pole 50 along the circumferential rotation of the insulating member 60 more stable, thereby improving the anti-torsion performance between the pole 50 and the insulating member 60 and between the insulating member 60 and the cover body 10.

[0069] As shown in Figures 2 to 4 and Figures 9 and 10, in one application scenario, a plurality of first slots 401 are provided circumferentially on the first limiting portion 11, and a plurality of first protrusions 402 are provided on the outer peripheral wall of the first insulating portion 61 of the insulating member 60 along the circumference of the insulating member 60. The first slots 401 are provided correspondingly to the first protrusions 402, and each first protrusion 402 is inserted into a corresponding first slot 401 to lock the insulating member 60 from rotating circumferentially along the pole hole 20. In addition, a plurality of second protrusions 502 are provided on the inner peripheral wall of the second insulating portion 62 of the insulating member 60 along the circumference of the insulating member 60, and a plurality of second slots 501 are provided on the pole 50 along the circumference of the pole 50. The second slots 501 are provided on the protruding portion 52 of the pole 50, and the second slots 501 are provided correspondingly to the second protrusions 502. Each second protrusion 502 is inserted into a corresponding second slot 501 to lock the pole 50 from rotating circumferentially along the insulating member 60. The first protrusion 402 and the first slot 401 prevent the insulator 60 from rotating circumferentially along the pole hole 20, and the second protrusion 502 and the second slot 501 prevent the pole 50 from rotating circumferentially along the insulator 60. This also indirectly prevents the pole 50 from rotating circumferentially along the pole hole 20.

[0070] In some embodiments, the terminal 50, the raised portion 72 of the insulating spacer 70, and the fixing member 30 squeeze the seal 40 in the first direction X, compressing the seal 40 and achieving a seal between the cover body 10 and the terminal 50. This also restricts the movement and rotation of the terminal 50, thereby preventing the seal 40 from becoming unstable due to the movement or rotation of the terminal 50.

[0071] On this basis, the area of ​​the first sealing surface 411 abutting against the second stop surface 522 is smaller than the area of ​​the second sealing surface 421 abutting against the fixing part 30 and the protrusion 72, which appropriately reduces the rebound force generated by the compression deformation of the seal 40 when the fixing part 30 and the protrusion 72 abut against the seal 40, thereby avoiding the deformation of the fixing part 30 and the insulating partition 70 due to excessive rebound force after the compression deformation of the seal 40, thereby ensuring the stability of the seal.

[0072] As shown in Figures 6 to 10, in some embodiments, the seal 40 includes a first sealing portion 41 and a second sealing portion 42 connected in a first direction X. The first sealing portion 41 and the second sealing portion 42 are configured as a stepped structure. The first sealing portion 41 abuts the side of the terminal 50 in the first direction X to form a first sealing surface 411, and the second sealing portion 42 abuts the side of the crimping assembly in the first direction X to form a second sealing surface 421. Specifically, the second sealing surface 421 abuts the fixing member 30 and the raised portion 72 of the insulating spacer 70. In the stepped structure of the seal 40, the area of ​​the first sealing surface 411 is smaller than that of the second sealing surface 421, which appropriately reduces the sealing area of ​​the first sealing surface 411 on the terminal 50. While ensuring the sealing performance of the seal 40, the rebound force generated by the seal 40 after compression deformation is small, thereby preventing deformation of the fixing member 30 and the insulating spacer 70.

[0073] In some embodiments, the sealing member 40 may further include a third sealing surface 422 formed between the first sealing surface 411 and the second sealing surface 421 , and the third sealing surface 422 abuts against the bottom surface of the insulating member 60 .

[0074] As shown in Figure 10, in some embodiments, expansion spaces 300 are provided between the first sealing portion 41 of the seal 40 and the insulating member 60, and between the second sealing portion 42 and the inner wall of the terminal hole 20, to allow the seal 40 to expand after compression. When the seal 40 is compressed and deformed, it fills the expansion spaces 300, further improving the insulation withstand voltage performance at the interface between the insulating member 60 and the seal 40.

[0075] In some embodiments, the cover plate assembly 1 further includes a lead-out plate 80 . The lead-out plate 80 has a second through hole 81 that is sleeved on the pole 50 . The lead-out plate 80 is fixedly connected to the pole 50 .

[0076] In the above embodiment, the lead-out piece 80 is arranged on the opposite side of the insulating partition 70 relative to the side where the seal 40 is located, the main body 51 of the pole 50 is inserted into the second through hole 81, and the lead-out piece 80 is welded to the main body 51 of the pole 50. The lead-out piece 80 can be used to connect the pole 50 to the pole piece in the battery 1000.

[0077] In other possible embodiments, as shown in Figures 11 and 12, the crimping assembly 600 may only include an insulating partition 70, and the raised portion 72 of the insulating partition 70 may have the same function as the fixing member 30 in the above embodiment. The raised portion 72 replaces the fixing member 30 and abuts against the seal 40. The top surface of the raised portion 72 abuts against the seal 40. The raised portion 72 works together with the pole 50 to compress the seal 40, so that the seal 40 has a better sealing effect.

[0078] Furthermore, the protrusion 72 can be configured arbitrarily according to actual needs. For example, as shown in Figures 11 and 12 , the side of the protrusion 72 facing away from the first through hole 71 can abut against the inner wall of the pole hole 20 to increase the structural strength of the insulating spacer and prevent the insulating spacer from deforming.

[0079] The present disclosure briefly describes the assembly of the cover assembly 1 in an exemplary manner, which is divided into two cases. First, the assembly of the cover assembly 1 is described when the crimping assembly 600 only includes the insulating partition 70. The cover assembly 1 usually has two poles 50, namely the positive pole and the negative pole. When assembling the cover assembly 1, the positive / negative pole is first assembled and connected with the insulating part 60, and then the pole 50 assembled with the insulating part 60 is inserted into the pole hole 20, so that the seal 40 abuts against the first limiting portion 11, and then the seal 40 is passed through the positive / negative pole to be fixed, and then the insulating partition 70 is assembled to the bottom surface of the cover body 10, and the protrusion 72 abuts against the seal 40, and squeezes the seal 40 to compress and seal the seal 40. The first through hole 71 on the insulating spacer 70 is sleeved on the main body 51 of the pole 50, and the lead piece 80 is sleeved on the main body 51 of the pole 50 through the second through hole 81 provided on the lead piece 80. The insulating spacer 70 is located between the lead piece 80 and the cover body 10. The lead piece 80 and the main body 51 of the pole 50 are welded and fixed, and the insulating spacer 70 is clamped between the cover body 10 and the lead piece 80.

[0080] Secondly, the assembly of the cover assembly 1 is described in the case where the crimping assembly 600 includes both the insulating spacer 70 and the fixing member 30. First, the positive / negative poles are assembled and connected with the insulating member 60, and then the pole 50 assembled with the insulating member 60 is inserted into the pole hole 20 so that the sealing member 40 abuts against the first limit portion 11, and then the sealing member 40 is passed through the positive / negative poles and fixed, and then the fixing member 30 is installed in the pole hole 20. After squeezing the sealing member 40, the fixing member 30 is welded to the inner wall of the pole hole 20, and then the insulating spacer 70 is assembled to the bottom surface of the cover body 10, and the insulating spacer 70 is assembled to the bottom surface of the cover body 10. The first through hole 71 on the insulating spacer 70 is sleeved on the main body 51 of the pole 50, the top surface of the protrusion 72 abuts against the seal 40, and the lead-out piece 80 is sleeved on the main body 51 of the pole 50 through the second through hole 81 provided in the lead-out piece 80. The insulating spacer 70 is located between the lead-out piece 80 and the cover body 10. The lead-out piece 80 and the main body 51 of the pole 50 are welded and fixed, and the insulating spacer 70 is clamped between the cover body 10 and the lead-out piece 80.

[0081] In some embodiments, the pole hole 20 may be configured as a circular hole, an elliptical hole, or a waist-shaped hole as shown in Figure 13. The pole hole 20 is not limited here.

[0082] Furthermore, as shown in Figures 1 and 13, an explosion-proof valve mounting hole 200 can be provided on the cover body 10. An explosion-proof valve 100 and an explosion-proof valve protection sheet 90 connected to the explosion-proof valve 100 are located within the explosion-proof valve mounting hole 200. The explosion-proof valve 100 can be laser welded to the cover body 10, and the explosion-proof valve protection sheet 90 is attached to the explosion-proof valve 100. The explosion-proof valve 100 can quickly vent and decompress the battery 1000 when the internal pressure exceeds a preset value, preventing explosions and acting as a safety valve.

[0083] As shown in FIG14 , the second aspect of the present disclosure provides a battery 1000 , comprising a battery housing 2 and the above-mentioned cover plate assembly 1 mounted on the battery housing 2 . The battery 1000 has all the beneficial effects of the above-mentioned cover plate assembly 1 .

[0084] As shown in FIG. 15 , the third aspect of the present disclosure further provides a vehicle 2000 , comprising the battery 1000 described above.

[0085] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0086] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0087] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A cover plate assembly (1), characterized in that: include: The cover plate body (10) comprises a pole hole (20) and a first limiting portion (11) extending from the inner wall of the pole hole (20) toward the center of the pole hole (20); A pole (50) inserted into the pole hole (20); An insulating member (60) is disposed between the pole (50) and the inner wall of the pole hole (20); A crimping assembly (600) is fixedly connected to the cover plate body (10) and is spaced apart from the first limiting portion (11) in a first direction; as well as A sealing member (40) is disposed between the crimping assembly (600) and the pole (50), and the sealing member (40) is attached to the pole (50); The insulating member (60) abuts against the first limiting portion (11) and the pole (50) in the first direction, respectively, and the crimping assembly (600) abuts against the sealing member (40) in the first direction, so that the crimping assembly (600) and the pole (50) compress the sealing member (40) in the first direction.

2. The cover plate assembly according to claim 1, characterized in that: The sealing member (40) comprises a first sealing surface (411) abutting and sealing with the pole (50) and a second sealing surface (421) abutting and sealing with the crimping assembly (600), wherein the area of ​​the first sealing surface (411) is smaller than the area of ​​the second sealing surface (421).

3. The cover plate assembly according to claim 2, characterized in that: The sealing member (40) comprises a first sealing portion (41) and a second sealing portion (42) connected in the first direction, the first sealing portion (41) abutting against the side surface of the pole (50) in the first direction to form the first sealing surface (411), and the second sealing portion (42) abutting against the side surface of the crimping assembly (600) in the first direction to form the second sealing surface (421); and / or The sealing member (40) further comprises a third sealing surface (422) formed between the first sealing surface (411) and the second sealing surface (421), wherein the third sealing surface (422) abuts against the bottom surface of the insulating member (60).

4. The cover plate assembly according to claim 3, characterized in that: The first sealing portion (41) and the second sealing portion (42) are configured as a stepped structure.

5. The cover plate assembly according to claim 3 or 4, characterized in that: An expansion space (300) is defined between the first sealing portion (41) and the insulating member (60); and An expansion space (300) is defined between the second sealing portion (42) and the inner wall of the pole hole (20).

6. The cover plate assembly according to any one of claims 1 to 5, characterized in that: The crimping assembly (600) comprises an insulating partition (70), wherein the insulating partition (70) is fixedly connected to the cover plate body (10), and a first through hole (71) corresponding to the pole hole (20) is provided on the insulating partition (70), and a protrusion (72) is provided in the circumference of the first through hole (71), and the protrusion (72) is inserted between the pole (50) and the inner wall of the pole hole (20), and the protrusion (72) abuts against the sealing member (40) in a first direction.

7. The cover plate assembly according to claim 6, characterized in that: The crimping assembly (600) further comprises a fixing member (30), wherein the fixing member (30) is located between the protruding portion (72) and the inner wall of the pole hole (20), the fixing member (30) is fixedly connected to the inner wall of the pole hole (20), and the fixing member (30) abuts against the sealing member (40) in a first direction.

8. The cover plate assembly according to any one of claims 1 to 7, characterized in that: The cover plate assembly (1) further comprises a lead-out plate (80), wherein the lead-out plate (80) comprises a second through hole (81) sleeved on the pole (50), and the pole (50) is fixedly connected to the lead-out plate (80).

9. The cover plate assembly according to claim 3, characterized in that: The pole (50) comprises a first stop surface (521) and a second stop surface (522) arranged opposite to each other in a first direction, and the insulating member (60) comprises a first limit surface (63) and a second limit surface (64) arranged opposite to each other in the first direction; The first limiting surface (63) abuts against the first limiting portion (11) in the first direction, the second limiting surface (64) abuts against the first stop surface (521) in the first direction, and the second stop surface (522) abuts against the first sealing surface (411), so as to limit the movement of the pole (50) in the first direction.

10. The cover plate assembly according to any one of claims 1 to 9, characterized in that: The cover plate assembly (1) further comprises: A first circumferential locking structure (400) is used to lock the circumferential rotation between the insulating member (60) and the first limiting portion (11); and / or The second circumferential locking structure (500) is used to lock the circumferential rotation between the insulating member (60) and the pole (50).

11. The cover plate assembly according to claim 10, characterized in that: The first circumferential locking structure (400) comprises a first protrusion (402) and a first slot (401), one of the first protrusion (402) and the first slot (401) being arranged on the first limiting portion (11), and the other being arranged on the insulating member (60), the first protrusion (402) being inserted into the first slot (401) to limit the insulating member (60) from rotating circumferentially along the pole hole (20); The second circumferential locking structure (500) comprises a second protrusion (502) and a second slot (501), one of the second protrusion (502) and the second slot (501) being arranged on the insulating member (60), and the other being arranged on the pole (50), and the second protrusion (502) being inserted into the second slot (501) to limit the circumferential rotation of the pole (50) along the insulating member (60).

12. The cover plate assembly according to claim 11, characterized in that: The number of the first protrusions (402) and the number of the first slots (402) are both plural, one of which is arranged at intervals on the first limiting portion (11) along the circumference of the first limiting portion (11), and the other is arranged at intervals on the insulating portion (60) along the circumference of the insulating portion (60); The number of the second protrusions (502) and the number of the second slots (501) are multiple, one of which is arranged on the insulating member (60) at intervals along the circumference of the insulating member (60), and the other is arranged on the pole (50) at intervals along the circumference of the pole (50).

13. The cover plate assembly according to any one of claims 1 to 12, characterized in that: The pole hole (20) is constructed as a round hole, an elliptical hole or a waist-shaped hole.

14. A battery (1000), characterized in that: It comprises a cover plate assembly (1) as claimed in any one of claims 1 to 13.

15. A vehicle (2000), characterized in that: Comprising the battery (1000) as claimed in claim 14.

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