Injection molding battery cover plate with clamping ring

Abstract

The injection molding battery cover plate comprises a light cover plate, a pole, a sealing ring, upper plastic, lower plastic and the clamping ring, the light cover plate is provided with a first end face and a second end face which are opposite to each other, and the upper plastic and the lower plastic are attached to the first end face and the second end face respectively. The polar column vertically penetrates through the light cover plate from the second end face and extends to the first end face, a first groove is formed in the position, protruding out of an upper column body of the first end face, of the polar column in the annular direction, and the sealing ring is arranged on the polar column in a sleeving mode and clamped between the second end face of the light cover plate and a column base of the polar column. The column base abuts against the bottom face of the lower plastic, a second groove is formed in the inner annular face, right facing the first groove, of the upper plastic, and the clamping ring is clamped in the first groove and the second groove at the same time. The injection-molded battery cover plate with the snap ring can well solve the problem that the post terminal is easy to leak liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of battery covers, in particular to an injection-molded battery cover with a snap ring. Background Art

[0002] The battery cover generally adopts a two-color in-mold injection structure, requiring the positive pole resistance to be 30 - 10000Ω, the negative pole to be insulated, and the explosion-proof valve and the cover to be connected by laser welding. To ensure the tightness, the helium leak rate does not exceed 1×10^-7 Pa·m^3 / s, and the bursting value is 0.8 ± 0.2 MPa. The explosion-proof film can rupture and exhaust gas in time after 10 cycles of breathing tests with a gas pressure of 0.15 MPa applied continuously from the inside to the outside and from the outside to the inside for 30 s.

[0003] In the prior art, the pole post, the sealing ring, the lower plastic, and the light cover of the battery cover are all injection-molded through an injection mold, assembled into a whole, and then the upper plastic is injection-molded. However, when welding the Parker on the surface of the pole post, the upper plastic is easily melted by heat and expands in volume. Furthermore, it is easily overflowed by the reverse thrust of the sealing ring on the bottom surface of the light cover. After cooling, since part of the upper plastic has overflowed outside, when the pole post is subjected to the reverse thrust of the sealing ring, it is easy to float upward, resulting in liquid leakage of the pole post. Summary of the Utility Model

[0004] An embodiment of the present application provides an injection-molded battery cover with a snap ring, which can well solve the problem of easy liquid leakage of the pole post.

[0005] An embodiment of the present application provides an injection-molded battery cover with a snap ring, including a light cover, a pole post, a sealing ring, an upper plastic, a lower plastic, and a snap ring. The light cover has opposite first and second end faces. The upper plastic and the lower plastic are respectively abutted against the first end face and the second end face. The pole post vertically penetrates the light cover from the second end face and extends to the first end face, and a first groove is axially formed in a circumferential direction on an upper column body protruding from the first end face. The sealing ring is sleeved on the pole post and clamped between the second end face of the light cover and the column base of the pole post. The column base abuts against the bottom surface of the lower plastic. The upper plastic is provided with a second groove on an inner circumferential surface facing the first groove. The snap ring is simultaneously clamped in the first groove and the second groove.

[0006] In a possible implementation manner, the snap ring is an LCP snap ring, a PEEK snap ring, or a PPSU snap ring.

[0007] In a possible implementation manner, in the axial direction of the upper column body, the snap ring and the first groove are in clearance fit.

[0008] In a possible implementation manner, the clearance between the snap ring and the first groove is less than or equal to 0.1 mm.

[0009] In a possible implementation, the snap ring has an inner end clamped into the first groove and an outer end clamped into the second groove, wherein a plurality of through holes are spaced along the extending direction of the snap ring at the outer end.

[0010] In a possible implementation, there are three through holes, and the three through holes are evenly distributed along the extending direction of the snap ring.

[0011] In a possible implementation, a planar structure is provided at the middle position of the end face of the outer end.

[0012] In a possible implementation, friction lines are evenly arranged along the circumferential direction at the bottom of the first groove.

[0013] Beneficial effects: Compared with the prior art, the injection-molded battery cover plate with a snap ring provided in this application can fix the pole post and the upper plastic on the light cover plate by means of the snap ring connected between the upper column body of the pole post and the upper plastic, so as to ensure that the sealing ring maintains the inherent sealing compression amount. When welding a Parker on the surface of the pole post, the upper plastic will not overflow upward, and the pole post will not float upward due to the reverse thrust of the sealing ring. Therefore, the sealing reliability of the pole post can be ensured, and the liquid leakage problem of the pole post can be solved.

[0014] Among them, by providing through holes at the outer end of the snap ring, when injecting the upper plastic, the upper plastic will automatically fill the through holes, so as to enhance the pulling force between the upper plastic and the snap ring, and further improve the stability and reliability of the snap ring.

[0015] These and other objects, features and advantages of the present utility model are fully embodied through the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a schematic structural view of the injection-molded battery cover plate with a snap ring of this application.

[0017] Figure 2 Shows a partial exploded structural view of the injection-molded battery cover plate with a snap ring of this application.

[0018] Figure 3 Shows a partial cross-sectional structural view of the injection-molded battery cover plate with a snap ring of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description of the present utility model can be applied to other embodiments, variants, improvements, equivalent solutions, and other technical solutions that do not depart from the spirit and scope of the present utility model.

[0020] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0021] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be construed as limiting the quantity.

[0022] Reference Figures 1 to 3, an embodiment of the present application provides an injection-molded battery cover with a snap ring, which includes a plain cover 10, a pole 20, a sealing ring 30, an upper plastic 40, a lower plastic 50, and a snap ring 60. The plain cover 10 has opposite first end face 11 and second end face 12, that is, the top face and the bottom face of the plain cover 10. The upper plastic 40 and the lower plastic 50 are respectively abutted against the first end face 11 and the second end face 12. At the same time, the pole 20 vertically penetrates the plain cover 10 from the second end face 12 and extends to the first end face 11, and a first groove 201 is circumferentially formed at the upper column body 21 protruding from the first end face 11. The sealing ring 30 is sleeved on the pole 20 and clamped between the second end face 12 of the plain cover 10 and the column base 22 of the pole 20 to achieve the sealing of the plain cover 10 at the pole 20. The column base 22 abuts against the bottom face of the lower plastic 50. The upper plastic 40 is provided with a second groove 401 on the inner circumferential face opposite to the first groove 201. The snap ring 60 is simultaneously clamped in the first groove 201 and the second groove 401. In this way, the connection between the upper plastic 40 and the pole 20 can be realized through the snap ring 60. At the same time, the column base 22 of the pole 20 is located at the second end face 12 of the plain cover 10. Therefore, the upper plastic 40 and the pole 20 can be fixed on the plain cover 10 through the cooperation relationship of the snap ring 60, the first groove 201, and the second groove 401 to ensure that the sealing ring 30 maintains the inherent sealing compression amount. Even when soldering the Parker on the surface of the pole 20, the sealing ring 30 will not generate a reverse thrust to cause the upper plastic 40 to overflow upward, and the pole 20 will not float, so as to better ensure the sealing reliability of the battery cover at the pole 20 and solve the problem of easy liquid leakage at the pole 20.

[0023] In one embodiment, the snap ring 60 is an LCP snap ring, a PEEK snap ring, or a PPSU snap ring. That is, the snap ring 60 is an environmentally friendly material that is more heat-resistant than PPS rubber material and is not easily deformed during welding, and has a better fixing effect on the upper plastic 40 and the pole 20.

[0024] In one embodiment, in the axial direction of the upper column body 21, the snap ring 60 and the first groove 201 are in clearance fit to facilitate the quick insertion of the snap ring 60 into the first groove 201 of the upper column body 21.

[0025] Further preferably, the clearance between the snap ring 60 and the first groove 201 is less than or equal to 0.1 mm, so as to not only facilitate the quick insertion of the snap ring 60 into the first groove 201, but also limit the axial movement space of the pole 20 to ensure the sealing compression amount of the sealing ring 30, and further ensure the sealing performance of the sealing ring 30.

[0026] In one embodiment, the snap ring 60 has an inner end snap-fitted into the first groove 201 and an outer end snap-fitted into the second groove 401. A plurality of through holes 601 are spaced along the extending direction of the snap ring 60 at the outer end. In this way, when the upper plastic 40 is injection-molded, the upper plastic 40 will automatically flow into the through holes 601 and fill the through holes 601, which can effectively enhance the tensile force between the upper plastic 40 and the snap ring 60 and improve the connection stability between the upper plastic 40 and the snap ring 60.

[0027] In one embodiment, there are three through holes 601, and the three through holes 601 are evenly distributed along the extending direction of the snap ring 60.

[0028] In one embodiment, a planar structure 61 is provided at the middle position of the end face of the outer end to facilitate quickly pushing the snap ring 60 into the first groove 201.

[0029] In one embodiment, friction lines 23 are evenly arranged along the circumferential direction at the bottom of the first groove 201, so as to increase the friction between the snap ring 60 and the pole 20 in the first groove 201, enhance the connection stability between the snap ring 60 and the pole 20, and prevent the pole 60 from floating.

[0030] It should be noted that the terms "first" and "second" in this application are only for descriptive purposes, do not represent any order, and cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and described in the embodiments. Without departing from the above principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. An injection molded battery cover with a snap ring, characterized in that: It includes a light cover, a pole, a sealing ring, an upper plastic, a lower plastic and a snap ring, the light cover has a first end face and a second end face opposite to each other, the upper plastic and the lower plastic are respectively abutted against the first end face and the second end face, the pole vertically penetrates the light cover from the second end face to extend to the first end face, and a first groove is annularly provided at the upper column protruding from the first end face, the sealing ring is sleeved on the pole and clamped between the second end face of the light cover and the pole seat of the pole, the pole seat abuts against the bottom surface of the lower plastic, the upper plastic has a second groove on the inner annular surface facing the first groove, and the snap ring is simultaneously clamped in the first groove and the second groove.

2. The injection molded battery cover with a snap ring as claimed in claim 1, characterized in that: The clamping ring is an LCP clamping ring, a PEEK clamping ring or a PPSU clamping ring.

3. The injection molded battery cover with a snap ring as claimed in claim 2, characterized in that: In the axial direction of the upper cylinder, the clamping ring and the first groove are clearance-fitted.

4. The injection molded battery cover with a snap ring as claimed in claim 3, characterized in that: The fitting clearance between the clamping ring and the first groove is less than or equal to 0.1 mm.

5. The injection molded battery cover with a snap ring as claimed in claim 1, characterized in that: The clamping ring has an inner end clamped into the first groove and an outer end clamped into the second groove, wherein the outer end has a plurality of through holes spaced apart along an extending direction of the clamping ring.

6. The injection molded battery cover with a snap ring as claimed in claim 5, characterized in that: There are three through holes, and the three through holes are evenly distributed along the extending direction of the clamping ring.

7. The injection molded battery cover with a snap ring as claimed in claim 5, characterized in that: A plane structure is arranged at the middle position of the end surface of the outer end.

8. The injection molded battery cover with a snap ring as claimed in claim 1, characterized in that: The groove bottom of the first groove is evenly provided with friction lines along the circumferential direction.

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