A battery cover plate assembly and a battery

Abstract

The embodiment of the utility model provides a kind of battery cover plate assembly and battery, it is related to battery technical field.Battery cover plate assembly includes cover plate body, pole and injection molding piece.Pole hole is set up on cover plate body.Pole is provided with riveting groove on one side.Pole passes through pole hole.Riveting groove is used to cooperate with riveting, to make the outside wall of riveting groove extend outward to press fit cover plate body.Injection molding piece is filled in riveting groove, and covers the outside wall of riveting groove and part cover plate body.Battery includes above-mentioned battery cover plate assembly.The utility model can realize riveting and the double fixing of injection molding, so that battery gives consideration to higher mechanical strength and greater creepage distance.

Description

Technical Field

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

[0002] Traditional battery covers primarily employ two independent structural designs: riveting and injection molding. The riveting design uses mechanical riveting to fix the metal terminals to the top cover base, with a single-layer sealing ring providing a physical seal between the terminals and the top cover. The plastic insulation only covers a small portion of the terminal's sidewall. The injection molding design, on the other hand, uses injection molding to integrally mold the insulating plastic with the metal terminals, employing a fully encapsulated insulation structure to cover the terminal surface, relying on the strength of the plastic material itself to maintain the terminal's position.

[0003] However, in the riveted structure design, the insulation layer only provides partial coverage, resulting in insufficient creepage distance. After high-temperature aging, the elasticity of the sealing ring decreases, easily leading to seal failure. There is also a risk of electrolyte leakage, and metal dust can easily accumulate in the gap between the electrode sidewall and the top cover, causing short circuits. In the injection-molded structure design, the plastic material undergoes creep deformation in high-temperature environments, causing a decrease in electrode height and leading to seal failure. Long-term thermal cycling causes microcracks at the plastic-metal interface, and the injection-molded layer has weak mechanical stress resistance and poor vibration resistance. Neither of these two designs can simultaneously meet the compatibility requirements of high mechanical strength and large creepage distance. Utility Model Content

[0004] The purpose of this utility model is to provide a battery cover assembly and a battery that can achieve dual fixation by riveting and injection molding, so that the battery can have both high mechanical strength and a large creepage distance.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a battery cover assembly, comprising:

[0007] The cover plate body has pole hole;

[0008] The pole has a riveting groove on one side, the pole passes through the pole hole, and the riveting groove is used for riveting fit so that the outer side wall of the riveting groove extends outward to press the cover plate body.

[0009] The injection molded part is filled in the riveting groove and covers the outer wall of the riveting groove and part of the cover plate body.

[0010] In an optional embodiment, a washer is also included, which is disposed on the cover plate body and located between the pole post and the cover plate body, and the outer wall of the press-fit groove extends outward and presses against the washer to press against the cover plate body.

[0011] In an optional embodiment, the top of the outer wall of the riveting groove is provided with a protrusion extending toward the side of the pole post. When the riveting groove is riveted, the outer wall of the riveting groove extends outward so that the protrusion presses against the washer.

[0012] In an optional embodiment, when the riveting groove is riveted, the included angle between the inner and outer walls of the riveting groove is α, the distance between the top of the outer wall of the riveting groove and the surface of the cover plate body is H, and the thickness of the protrusion along the direction perpendicular to the surface of the cover plate body is t, wherein 5°≤α≤10°, 1.5mm≤H≤2mm, and 0.4mm≤t≤1.5mm.

[0013] In an optional embodiment, the distance between the surface of the injection molded part and the surface of the cover plate body is D, the distance between the outer side wall of the injection molded part and the outer side wall of the protrusion is W, and the distance between the surface of the injection molded part and the top of the outer side wall of the riveting groove is L, wherein 2mm≤D≤3mm, 1mm≤W≤1.5mm, and 0.5mm≤L≤1mm.

[0014] In an optional embodiment, a lower molding part is also included, which is disposed on the side of the cover plate body away from the injection molded part, and the lower molding part is provided with a through hole corresponding to the pole hole;

[0015] A convex plate is provided on the side of the pole away from the riveting groove. The pole passes through the through hole and the pole hole in sequence. The convex plate abuts against the side of the lower plastic part away from the cover plate body.

[0016] In an optional embodiment, a raised ring is provided on the side of the lower plastic part away from the cover plate body, and the raised disc cooperates with the raised ring.

[0017] In an optional embodiment, a sealing ring is also fitted onto the pole post, and the sealing ring is located between the pole post and the cover plate body.

[0018] In an optional embodiment, the lower plastic part has a plurality of protrusions spaced apart on the side away from the cover plate body, and the protrusions form a groove between them.

[0019] Secondly, the present invention provides a battery, including the battery cover assembly described in any of the foregoing embodiments.

[0020] The beneficial effects of the battery cover assembly and battery provided in this embodiment of the present invention include:

[0021] The battery cover assembly provided by this utility model includes a cover body, terminals, and an injection-molded part. The cover body has a terminal hole. A riveting groove is provided on one side of the terminal. The terminal passes through the terminal hole. The riveting groove is used for riveting engagement, so that the outer wall of the riveting groove extends outward to press the cover body together. The injection-molded part fills the riveting groove and covers the outer wall of the riveting groove and part of the cover body. By setting the riveting groove, its outer wall is riveted outward during riveting, and the cover body is pressed together by the outer wall of the riveting groove to achieve riveting fixation, improving mechanical strength and preventing the terminals from falling off or deforming due to vibration; by performing injection molding after riveting, the coverage area of ​​the insulation region is expanded, increasing the creepage distance. This utility model can achieve dual fixation through riveting and injection molding, enabling the battery to achieve both high mechanical strength and a large creepage distance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded view of the battery cover assembly provided in this embodiment;

[0024] Figure 2 This is a schematic diagram of the battery cover assembly before riveting provided in this embodiment;

[0025] Figure 3 This is a schematic diagram of the structure of the battery cover assembly after riveting provided in this embodiment;

[0026] Figure 4 for Figure 2 Enlarged view of section A;

[0027] Figure 5 for Figure 3 Enlarged view of section B;

[0028] Figure 6 This is a schematic diagram of the riveting dimensions of the first riveting groove provided in this embodiment;

[0029] Figure 7 This is a schematic diagram of the injection molding dimensions of the first crimping groove provided in this embodiment.

[0030] Icons: 100-Battery cover assembly; 10-Cover body; 11-Positive terminal hole; 12-Negative terminal hole; 13-Explosion-proof valve hole; 131-Explosion-proof sheet; 14-Injection hole; 20-Lower molded part; 21-Positive through hole; 22-Negative through hole; 23-First convex ring; 25-Boss; 26-Slot; 31-Positive terminal; 311-First convex disc; 312-First pressing groove; 313-First protrusion; 32-Negative terminal; 321-Second convex disc; 322-Second pressing groove; 43-First washer; 44-Second washer; 45-First sealing ring; 46-Second sealing ring; 47-Injection molded part. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing 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, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0037] Please refer to Figures 1-7 The battery cover assembly 100 provided by this utility model is applied to a battery and serves to seal the inside of the battery, provide electrical connection, and ensure battery safety.

[0038] The battery cover assembly 100 provided by this utility model includes a cover body 10, a terminal post, and an injection molded part 47. The cover body 10 has a terminal post hole. A riveting groove is provided on one side of the terminal post. The terminal post passes through the terminal post hole. The riveting groove is used for riveting fit, so that the outer wall of the riveting groove extends outward to press the cover body 10 together. The injection molded part 47 fills the riveting groove and covers the outer wall of the riveting groove and part of the cover body 10.

[0039] Specifically, in this embodiment, the electrode hole includes a positive electrode hole 11 and a negative electrode hole 12. The riveting groove includes a first riveting groove 312 and a second riveting groove 322. The first riveting groove 312 is provided on one side of the positive electrode 31. The second riveting groove 322 is provided on one side of the negative electrode 32. The positive electrode 31 passes through the positive electrode hole 11. The negative electrode 32 passes through the negative electrode hole 12.

[0040] In this embodiment, the riveting groove is used to rivet with a riveting component. Specifically, the first riveting groove 312 is used to cooperate with the first riveting component, so that the outer side wall of the first riveting groove 312 extends outward to press the cover plate body 10. The second riveting groove 322 is used to cooperate with the second riveting component, so that the outer side wall of the second riveting groove 322 extends outward to press the cover plate body 10.

[0041] It is understood that in this embodiment, both the first riveting groove 312 and the second riveting groove 322 are annular grooves. Both the first riveting member (not shown) and the second riveting member (not shown) are annular riveting fixtures with a wedge-shaped cross-section. When the positive terminal 31 and the negative terminal 32 are installed on the cover plate body 10, they are riveted into the first riveting groove 312 and the second riveting groove 322 by the first riveting member and the second riveting member respectively, so that the outer walls of the first riveting groove 312 and the second riveting groove 322 extend outward at an angle, thereby pressing the outer walls of the first riveting groove 312 and the second riveting groove 322 onto the cover plate body 10, thus completing the riveting fixation.

[0042] Furthermore, this embodiment also includes an injection-molded part 47. The injection-molded part 47 fills the first riveting groove 312 and the second riveting groove 322, and covers the outer walls of the first riveting groove 312 and the second riveting groove 322, as well as part of the cover plate body 10. It can be understood that after riveting is completed, injection molding is performed at the positions of the positive terminal 31 and the negative terminal 32, respectively. The injection-molded part 47 covers the first riveting groove 312 and the second riveting groove 322, and their outer walls, and then extends outwards to part of the cover plate body 10. By performing injection molding after riveting, i.e., by providing the injection-molded part 47, the insulation layer area at the terminal position can be increased, the creepage distance can be improved, and insulation failure can be prevented.

[0043] Understandably, creepage distance is the shortest path between two conductive parts or between a conductive part and the protective interface of an equipment, measured along an insulating surface. Its core function is to prevent insulation failure caused by surface discharge.

[0044] It should be noted that in this embodiment, both the first and second riveting components are used to perform riveting operations on the first riveting groove 312 and the second riveting groove 322. During subsequent injection molding, the first and second riveting components are removed from the first riveting groove 312 and the second riveting groove 322, respectively.

[0045] In this embodiment, a first riveting groove 312 and a second riveting groove 322 are respectively provided on the positive electrode post 31 and the negative electrode post 32. A first riveting member and a second riveting member are respectively riveted into the first riveting groove 312 and the second riveting groove 322, causing the outer walls of the first riveting groove 312 and the second riveting groove 322 to extend and deform outward, thereby increasing the diameter of the outer walls of the first riveting groove 312 and the second riveting groove 322. The diameter of the outer walls of the first riveting groove 312 and the second riveting groove 322 is larger than the diameter of the positive electrode post hole 11 and the negative electrode post hole 12, so that the side walls of the first riveting groove 312 and the second riveting groove 322 are pressed against the outside of the cover plate body 10, thereby limiting the positive electrode post 31 and the negative electrode post 32 and preventing the positive electrode post 31 and the negative electrode post 32 from sinking into the battery.

[0046] Furthermore, the battery cover assembly 100 also includes a gasket. The gasket is disposed on the cover body 10 and located between the terminal post and the cover body 10. The outer wall of the crimping groove extends outward and presses the gasket to press the cover body 10 together.

[0047] Specifically, the gaskets include a first gasket 43 and a second gasket 44. The first gasket 43 is disposed on the cover plate body 10 and located between the positive electrode post 31 and the cover plate body 10. The outer wall of the first crimping groove 312 extends outward and presses the first gasket 43 to press the cover plate body 10. The second gasket 44 is disposed on the cover plate body 10 and located between the negative electrode post 32 and the cover plate body 10. The outer wall of the second crimping groove 322 extends outward and presses the second gasket 44 to press the cover plate body 10. It can be understood that by setting the first gasket 43 and the second gasket 44 between the cover plate body 10 and the electrode post, the crimping structure is made tighter, further preventing the positive electrode post 31 and the negative electrode post 32 from falling off or sinking, and improving the sealing performance of the electrode post.

[0048] Furthermore, the top of the outer wall of the riveting groove is provided with a protrusion extending toward the side of the pole post. When the riveting groove is riveted, the outer wall of the riveting groove extends outward so that the protrusion presses against the washer.

[0049] Specifically, in this embodiment, the protrusions include a first protrusion 313 and a second protrusion. The top of the outer wall of the first riveting groove 312 is provided with a first protrusion 313 extending toward the side of the positive electrode post 31, and the top of the outer wall of the second riveting groove 322 is provided with a second protrusion extending toward the side of the negative electrode post 32. When the first riveting groove 312 is riveted, the outer wall of the first riveting groove 312 extends outward so that the first protrusion 313 presses onto the first washer 43. When the second riveting groove 322 is riveted, the outer wall of the second riveting groove 322 extends outward so that the second protrusion presses onto the second washer 44. It can be understood that by providing the first protrusion 313 and the second protrusion, the contact area between the outer walls of the first riveting groove 312 and the second riveting groove 322 and the first washer 43 and the second washer 44 is increased, further improving the sealing performance of the electrode post.

[0050] When the riveting groove is riveted, the included angle between the inner and outer walls of the riveting groove is α, the distance between the top of the outer wall of the riveting groove and the surface of the cover plate body 10 is H, and the thickness of the protrusion along the direction perpendicular to the surface of the cover plate body 10 is t, where 5°≤α≤10°, 1.5mm≤H≤2mm, and 0.4mm≤t≤1.5mm.

[0051] Specifically, when the first riveting groove 312 is riveted, the included angle between the inner and outer walls of the first riveting groove 312 is α1, the distance between the top of the outer wall of the first riveting groove 312 and the surface of the cover plate body 10 is H1, and the thickness of the first protrusion 313 along the direction perpendicular to the surface of the cover plate body 10 is t1, wherein 5°≤α1≤10°, 1.5mm≤H1≤2mm, and 0.4mm≤t1≤1.5mm.

[0052] When the second riveting groove 322 is riveted, the included angle between the inner and outer walls of the second riveting groove 322 is α2, the distance between the top of the outer wall of the second riveting groove 322 and the surface of the cover plate body 10 is H2, and the thickness of the second protrusion along the direction perpendicular to the surface of the cover plate body 10 is t2, where 5°≤α2≤10°, 1.5mm≤H2≤2mm, and 0.4mm≤t2≤1.5mm.

[0053] It is understandable that when α1 > 15° or α2 > 15°, stress concentration at the riveting position can easily lead to cracks; when α1 < 5° or α2 < 5°, the mechanical engagement strength will be reduced, resulting in insufficient axial thrust and pole detachment. This embodiment, by reasonably setting α1 or α2, can avoid stress concentration causing cracks or insufficient mechanical engagement strength leading to pole detachment.

[0054] When H1 > 2mm or H2 > 2mm, the outer wall of the first riveting groove 312 or the second riveting groove 322 is too high. Subsequent injection molding may result in insufficient thickness of the injection molded part 47, easily leading to flashover and breakdown, causing insulation failure. When H1 < 1.5mm or H2 < 1.5mm, the outer wall of the first riveting groove 312 or the second riveting groove 322 is too low. The strength of the outer walls of the first riveting groove 312 and the second riveting groove 322 is too low, making breakage easily detectable during riveting operations. This embodiment, by reasonably setting H1 or H2, can avoid insufficient thickness of the injection molded part 47 leading to insulation failure or breakage of the outer wall of the first riveting groove 312 or the second riveting groove 322 during riveting.

[0055] When t1 > 1.5mm or t2 > 1.5mm, meaning the thickness of the first protrusion 313 or the second protrusion is too large, the existing process makes it difficult to perform the flanging operation. When t1 < 0.4mm or t2 < 0.4mm, meaning the thickness of the first protrusion 313 or the second protrusion is too small, the axial strength of the pole post is insufficient, the pressing force is insufficient, and the pole post is prone to falling off. This embodiment, by reasonably setting t1 or t2, can ensure the riveting strength and prevent the pole post from falling off.

[0056] Furthermore, the distance between the surface of the injection molded part 47 and the surface of the cover plate body 10 is D, the distance between the outer side wall of the injection molded part 47 and the outer side wall of the protrusion is W, and the distance between the surface of the injection molded part 47 and the top of the outer side wall of the riveting groove is L, wherein 2mm≤D≤3mm, 1mm≤W≤1.5mm, and 0.5mm≤L≤1mm.

[0057] Specifically, in this embodiment, the distance between the outer wall of the injection molded part 47 and the outer wall of the first protrusion 313 is W1, and the distance between the surface of the injection molded part 47 and the top of the outer wall of the first riveting groove 312 is L1, wherein 2mm≤D≤3mm, 1mm≤W1≤1.5mm, and 0.5mm≤L1≤1mm; the distance between the outer wall of the injection molded part 47 and the outer wall of the second protrusion is W2, and the distance between the surface of the injection molded part 47 and the top of the outer wall of the second riveting groove 322 is L2, wherein 1mm≤W2≤1.5mm, and 0.5mm≤L2≤1mm.

[0058] Understandably, when D < 2mm, meaning the injection molding thickness of the injection molded part 47 is insufficient, it is easily broken down, resulting in insulation failure. When D > 3mm, meaning the injection molding thickness of the injection molded part 47 is too large, it easily leads to shrinkage, with an injection shrinkage rate > 0.8%, resulting in electrode position misalignment and insufficient electrode strength. This embodiment, by reasonably setting D, can ensure the insulation effect of the injection molded part 47.

[0059] This embodiment can block the dust migration path between the pole and the cover plate body 10 by reasonably setting W1 or W2, and prevent dust accumulation from causing a short circuit.

[0060] This embodiment extends the creepage distance at the pole position by reasonably setting L1 or L2, thus preventing insulation failure.

[0061] Furthermore, the battery cover assembly 100 of this embodiment also includes a lower plastic member 20. The lower plastic member 20 is disposed on the side of the cover body 10 away from the injection molded part 47. The lower plastic member 20 is provided with a through hole corresponding to the terminal hole. A protrusion is provided on the side of the terminal hole away from the crimping groove. The terminal passes through the through hole and the terminal hole in sequence. The protrusion abuts against the side of the lower plastic member 20 away from the cover body 10.

[0062] Specifically, the through holes include a positive through hole 21 corresponding to the positive terminal hole 11 and a negative through hole 22 corresponding to the negative terminal hole 12. The cams include a first cam 311 and a second cam 321. The first cam 311 is provided on the side of the positive terminal 31 away from the first pressing groove 312, and the second cam 321 is provided on the side of the negative terminal 32 away from the second pressing groove 322. The positive terminal 31 passes through the positive through hole 21 and the positive terminal hole 11 in sequence. The first cam 311 abuts against the side of the lower plastic part 20 away from the cover plate body 10. The negative terminal 32 passes through the negative through hole 22 and the negative terminal hole 12 in sequence, and the second cam 321 abuts against the side of the lower plastic part 20 away from the cover plate body 10.

[0063] In this embodiment, holes are made in the cover plate body 10 and the lower plastic part 20, through which the positive electrode post 31 and the negative electrode post 32 pass sequentially. Specifically, the first convex plate 311 and the second convex plate 321 are disc-shaped structures that circumferentially protrude towards the positive electrode post 31 and the negative electrode post 32. The first convex plate 311 and the second convex plate 321 are arranged to abut against the lower part of the lower plastic part 20 to limit the positive electrode post 31 and the negative electrode post 32 and prevent them from falling off. It can be understood that in this embodiment, the lower plastic part 20 is disposed on the inner side of the cover plate body 10, that is, when the battery cover plate assembly 100 is installed on the battery, the lower plastic part 20 is located inside the battery. The inner side of the cover plate body 10 refers to the side facing the inside of the battery, and the outer side of the cover plate body 10 refers to the side facing the outside of the battery. By setting the first cam 311 and the second cam 321 to abut against the side of the lower plastic part 20 near the inside of the battery, the positive terminal 31 and the negative terminal 32 are prevented from moving away from the inside of the battery and from falling off.

[0064] Furthermore, a convex ring is provided on the side of the lower plastic part 20 away from the cover plate body 10. A convex disc engages with the convex ring. Specifically, the convex ring includes a first convex ring 23 and a second convex ring. A first convex disc 311 engages with the first convex ring 23, and a second convex disc 321 engages with the second convex ring. Specifically, in this embodiment, the first convex ring 23 and the second convex ring are annular protrusions, and the first convex disc 311 and the second convex disc 321 are discs. When the first convex disc 311 and the second convex disc 321 abut against the lower plastic part 20, the first convex disc 311 is located within the first convex ring 23, and the first convex ring 23 limits the positive electrode post 31 to prevent the positive electrode post 31 from shifting away from the lower plastic part 20; the second convex disc 321 is located within the second convex ring, and the second convex ring limits the negative electrode post 32 to prevent the negative electrode post 32 from shifting away from the lower plastic part 20.

[0065] Optionally, in other embodiments, the first convex disk 311 and the second convex disk 321 can be other shapes, such as squares, polygons, etc. Correspondingly, the first convex ring 23 and the second convex ring can be set to other shapes, such as squares, polygons, etc. As long as the positioning of the positive terminal 31, the negative terminal 32 and the lower plastic part 20 can be achieved, the present invention does not limit the shape of the first convex disk 311, the second convex disk 321, the first convex ring 23 and the second convex ring.

[0066] In this embodiment, a sealing ring is also fitted onto the terminal post. The sealing ring is located between the terminal post and the cover plate body 10. Specifically, the sealing ring includes a first sealing ring 45 and a second sealing ring 46. The first sealing ring 45 is fitted onto the positive terminal post 31, and the second sealing ring 46 is fitted onto the negative terminal post 32. The first sealing ring 45 is located between the first convex plate 311 and the cover plate body 10. The second sealing ring 46 is located between the second convex plate 321 and the cover plate body 10. The first sealing ring 45 is used to seal the gap between the positive terminal post 31 and the cover plate body 10, and the second sealing ring 46 is used to seal the gap between the negative terminal post 32 and the cover plate body 10. By setting the first sealing ring 45 and the second sealing ring 46, the sealing performance of the terminal post is improved, and battery leakage is prevented.

[0067] Please refer to Figure 2 and Figure 3 The lower plastic part 20 has multiple protrusions 25 spaced apart on the side away from the cover plate body 10, forming a slot 26 between the protrusions 25. It can be understood that when the battery cover plate assembly 100 is installed on the battery, the side of the lower plastic part 20 away from the cover plate body 10 faces the inside of the battery. The battery has a core and tabs. By setting the protrusions 25 and the slots 26, the protrusions 25 can limit the core, and the slots 26 can provide installation space for the core and tabs.

[0068] Please refer to Figure 1In this embodiment, the cover plate body 10 is also provided with an explosion-proof valve hole 13. An explosion-proof plate 131 is fixed at the explosion-proof valve hole 13. The explosion-proof valve hole 13 is located between the positive terminal hole 11 and the negative terminal hole 12.

[0069] Furthermore, the cover plate body 10 is also provided with a liquid injection hole 14. The liquid injection hole 14 is located between the positive electrode post hole 11 and the negative electrode post hole 12.

[0070] The beneficial effects of the battery cover assembly 100 and the battery provided in this embodiment of the present invention include:

[0071] The battery cover assembly 100 provided by this utility model includes a cover body 10, terminals, and an injection molded part 47. The cover body 10 has a positive terminal hole 11 and a negative terminal hole 12. The terminals include a positive terminal 31 and a negative terminal 32. A first riveting groove 312 is provided on one side of the positive terminal 31. A second riveting groove 322 is provided on one side of the negative terminal 32. The positive terminal 31 passes through the positive terminal hole 11. The negative terminal 32 passes through the negative terminal hole 12. The first riveting groove 312 is used to cooperate with a first riveting component, so that the outer wall of the first riveting groove 312 extends outward to press the cover body 10. The second riveting groove 322 is used to cooperate with a second riveting component, so that the outer wall of the second riveting groove 322 extends outward to press the cover body 10. The injection-molded part 47 fills the first riveting groove 312 and the second riveting groove 322, and covers the outer walls of the first riveting groove 312 and the second riveting groove 322 as well as part of the cover plate body 10. By setting the first riveting groove 312 and the second riveting groove 322, their outer walls are riveted outward during riveting. The cover plate body 10 is fixed by pressing the outer walls of the first riveting groove 312 and the second riveting groove 322 together, thereby improving mechanical strength and preventing the electrode post from falling off or deforming due to vibration. By performing injection molding after riveting, the coverage area of ​​the insulation region is expanded, and the creepage distance is increased. This utility model can achieve dual fixation by riveting and injection molding, so that the battery can have both high mechanical strength and a large creepage distance.

[0072] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cover assembly, characterized in that, include; The cover plate body has pole hole; The pole has a riveting groove on one side, the pole passes through the pole hole, and the riveting groove is used for riveting fit so that the outer side wall of the riveting groove extends outward to press the cover plate body. The injection molded part is filled in the riveting groove and covers the outer wall of the riveting groove and part of the cover plate body.

2. The battery cover assembly according to claim 1, characterized in that, It also includes a washer disposed on the cover plate body and located between the pole post and the cover plate body, wherein the outer wall of the press-fit groove extends outward and presses against the washer to press against the cover plate body.

3. The battery cover assembly according to claim 2, characterized in that, The top of the outer wall of the riveting groove is provided with a protrusion extending toward the side of the pole post. When the riveting groove is riveted, the outer wall of the riveting groove extends outward so that the protrusion presses against the washer.

4. The battery cover assembly according to claim 3, characterized in that, When the riveting groove is riveted, the included angle between the inner and outer walls of the riveting groove is α, the distance between the top of the outer wall of the riveting groove and the surface of the cover plate body is H, and the thickness of the protrusion along the direction perpendicular to the surface of the cover plate body is t, where 5°≤α≤10°, 1.5mm≤H≤2mm, and 0.4mm≤t≤1.5mm.

5. The battery cover assembly according to claim 3, characterized in that, The distance between the surface of the injection molded part and the surface of the cover plate body is D, the distance between the outer side wall of the injection molded part and the outer side wall of the protrusion is W, and the distance between the surface of the injection molded part and the top of the outer side wall of the riveting groove is L, wherein 2mm≤D≤3mm, 1mm≤W≤1.5mm, and 0.5mm≤L≤1mm.

6. The battery cover assembly according to claim 1, characterized in that, It also includes a lower molding part, which is disposed on the side of the cover plate body away from the injection molded part, and the lower molding part is provided with a through hole corresponding to the pole hole; A convex plate is provided on the side of the pole away from the riveting groove. The pole passes through the through hole and the pole hole in sequence. The convex plate abuts against the side of the lower plastic part away from the cover plate body.

7. The battery cover assembly according to claim 6, characterized in that, The lower plastic part is also provided with a protruding ring on the side away from the cover plate body, and the protruding plate cooperates with the protruding ring.

8. The battery cover assembly according to claim 1, characterized in that, A sealing ring is also fitted onto the pole post, and the sealing ring is located between the pole post and the cover plate body.

9. The battery cover assembly according to claim 6, characterized in that, The lower plastic part has multiple protrusions spaced apart on the side away from the cover plate body, and the protrusions form a groove between them.

10. A battery, characterized in that, Includes the battery cover assembly as described in any one of claims 1-9.

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