CN215119059U

CN215119059U - Secondary battery top cap seal structure

Info

Publication number: CN215119059U
Application number: CN202121035439.XU
Authority: CN
Inventors: 章翔; 刘艳绒; 罗薇
Original assignee: Wuhu Etc Battery Ltd
Current assignee: Wuhu Etc Battery Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-12-10
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a secondary battery top cap seal structure, its characterized in that: including top cap piece, utmost point post and sealing washer, be equipped with the through-hole I that supplies utmost point post to pass on the top cap piece, through-hole I is the toper structure, and the sealing washer is the toper, and utmost point post also is the toper with sealing washer complex one end, and the sealing washer is the inclined plane with the contact surface of through-hole I, and utmost point post also is the inclined plane with the contact surface of sealing washer. The utility model discloses a design sealing washer and top cap piece and the contact surface of utmost point post are the mode on inclined plane for under the condition of same compression capacity, the sealing washer reduces the reaction force of the sealed face of top cap piece, utmost point post or plastic, and partly by X to bearing, has reduced the deformation and the utmost point post atress of the sealed face of top cap piece, thereby reduces the risk of the sealed inefficacy of top cap piece.

Description

Secondary battery top cap seal structure

Technical Field

The utility model belongs to the technical field of the new forms of energy battery, concretely relates to secondary battery top cap seal structure.

Background

The secondary battery generally comprises a cover plate aluminum sheet, positive and negative electrode posts, post plastic, a sealing ring and the like. The sealing washer is located between utmost point post and the top cap piece, through the mode that welding or plastic were moulded plastics, makes utmost point post and top cap piece compress tightly the sealing washer to realize the sealed of battery.

However, the sealing ring can generate reaction force to the cover plate and the pole under the action of pressure, if the reaction force causes the deformation of the sealing surface of the top cover or the plastic is pushed open by the reaction force after aging, the compression amount of the sealing ring is reduced, and the sealing performance of the whole battery is influenced.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence among the prior art, the utility model aims to provide a secondary cell top cap seal structure of simple structure, convenient to use.

In order to achieve the above purpose, the technical scheme of the utility model is that: a secondary battery top cap seal structure which characterized in that: including top cap piece, utmost point post and sealing washer, be equipped with the through-hole I that supplies utmost point post to pass on the top cap piece, through-hole I is the toper structure, and the sealing washer is the toper, and utmost point post also is the toper with sealing washer complex one end, and the sealing washer is the inclined plane with the contact surface of through-hole I, and utmost point post also is the inclined plane with the contact surface of sealing washer.

Further, the secondary battery top cap still includes plastic down, is equipped with the through-hole II that corresponds with through-hole I on the plastic down, and through-hole II is equipped with the turn-ups of upturning all around, and I joint of through-hole is on the turn-ups.

Furthermore, the outer side of the upper plastic flanging is provided with an inclined plane matched with the conical structure of the through hole I, and the conical structure of the through hole I is attached to the inclined plane on the outer side of the flanging.

Furthermore, the sealing structure further comprises a welding aluminum sheet which is sleeved on the periphery of the pole and welded on the top cover sheet.

Further, seal structure still includes the plastic, and top cap piece, lower plastic, utmost point post, sealing washer and welding aluminum sheet are changeed and are joined in marriage the completion back, and mould plastics around the utmost point post on the top cap piece, and the plastic solidifies around utmost point post, and the welding aluminum sheet is wrapped up in the plastic.

Furthermore, be equipped with on the side of utmost point post along the circumferencial direction and be equipped with the recess, during the injection molding, the plastic solidifies in the arch around recess and the interlock of utmost point post.

Furthermore, the upper portion of the sealing ring is provided with an upper flanging, the flanging is parallel to the axis of the pole, and the upper flanging is wrapped in the plastic.

Furthermore, an upper flanging is arranged at the upper part of the sealing ring, a lower folding edge is arranged at the lower part of the sealing ring, the lower folding edge is in aligned contact with the end part of the flanging, and the upper flanging is wrapped in the plastic.

Adopt the utility model discloses technical scheme's advantage does:

1. the utility model discloses a design sealing washer and top cap piece and the contact surface of utmost point post are the mode on inclined plane for under the condition of same compression capacity, the sealing washer reduces the reaction force of the sealed face of top cap piece, utmost point post or plastic, and partly by X to bearing, has reduced the deformation and the utmost point post atress of the sealed face of top cap piece, thereby reduces the risk of the sealed inefficacy of top cap piece.

2. The utility model discloses the sealing washer is located between utmost point post and the top cap piece, through the mode that welding or plastic were moulded plastics, makes utmost point post and top cap piece compress tightly the sealing washer to realize the sealed of battery. The sealing surfaces of the sealing ring, the top cover plate and the pole are changed into inclined surface contact, so that after the sealing ring is compressed, the same compression amount and part of reaction force are born by the X direction, the component force which acts on the Y direction and influences the compression amount of the sealing ring is reduced, and the risk of failure of the sealing ring is reduced.

Drawings

The invention will be described in further detail with reference to the following drawings and detailed description:

fig. 1 is an explosion schematic view of the secondary battery top cover sealing structure of the present invention;

fig. 2 is a schematic sectional view of the sealing structure of the present invention;

fig. 3 is a schematic sectional view of the sealing structure of the present invention;

fig. 4 is a schematic sectional view of the sealing structure of the present invention.

The labels in the above figures are respectively: 1-top cover sheet; 2-pole column; 3, sealing rings; 4, plastic cement is discharged; 5-welding aluminum sheets: 6, plastic cement.

Detailed Description

In the present invention, it is to be understood that the term "length"; "Width"; "Up"; "Down"; "front"; "Back"; "left"; "Right"; "vertical"; "horizontal"; "Top"; "bottom" "inner"; "outer"; "clockwise"; "counterclockwise"; "axial"; "planar direction"; the directional or positional relationship indicated as "circumferential" or the like is based on the directional or positional relationship shown in the drawings, and is only for convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a particular orientation; constructed and operative in a particular orientation and therefore should not be construed as limiting the invention.

As shown in fig. 1 to 3, a secondary battery top cap sealing structure is characterized in that: including top cap piece 1, utmost point post 2 and sealing washer 3, be equipped with I11 of through-hole that supplies utmost point post 2 to pass on the top cap piece 1, through-hole I11 is the toper structure, and sealing washer 3 is the toper, and utmost point post 2 also is the toper with 3 complex one ends of sealing washer, and sealing washer 3 is the inclined plane with the contact surface of through-hole I11, and utmost point post 2 also is the inclined plane with the contact surface of sealing washer 3. The utility model discloses a design sealing washer and top cap piece and the contact surface of utmost point post are the mode on inclined plane for under the condition of same compression capacity, the sealing washer reduces the reaction force of the sealed face of top cap piece, utmost point post or plastic, and partly by X to bearing, has reduced the deformation and the utmost point post atress of the sealed face of top cap piece, thereby reduces the risk of the sealed inefficacy of top cap piece.

The secondary battery top cap still includes plastic 4 down, is equipped with II 41 of through-hole corresponding with I11 on the plastic 4 down, and the turn-ups 42 that turns up is equipped with around II 41 of through-hole, and I11 joint of through-hole is on turn-ups 42. The outer side of the upper flanging 42 of the lower plastic 4 is provided with an inclined plane matched with the conical structure of the through hole I11, and the conical structure of the through hole I11 is attached to the inclined plane on the outer side of the flanging 42.

The sealing structure further comprises a welding aluminum sheet 5, and the welding aluminum sheet 5 is sleeved on the periphery of the pole 2 and welded on the top cover plate 1. The sealing structure further comprises plastic 6, the top cover plate 1, the lower plastic 4, the pole 2, the sealing ring 3 and the welding aluminum sheet 5 are subjected to transfer and matching, then the injection molding is carried out on the periphery of the pole 2 on the top cover plate 1, the plastic 3 is solidified on the periphery of the pole 2, and the welding aluminum sheet 5 is wrapped in the plastic 6.

The sealing washer is located between utmost point post and the top cap piece, through the mode that welding or plastic were moulded plastics, makes utmost point post and top cap piece compress tightly the sealing washer to realize the sealed of battery. The sealing surfaces of the sealing ring, the top cover plate and the pole are changed into inclined surface contact, so that after the sealing ring is compressed, the same compression amount and part of reaction force are born by the X direction, the component force which acts on the Y direction and influences the compression amount of the sealing ring is reduced, and the risk of failure of the sealing ring is reduced.

Be equipped with on the side of utmost point post 2 along the circumferencial direction and be equipped with the recess, during the time of moulding plastics, plastic 6 solidifies in the arch around recess and utmost point post 2 interlock, can prevent like this that utmost point post 2 from rotating for plastic 6.

Preferably, the upper part of the sealing ring 3 is provided with an upper flange 31, the flange 31 is parallel to the axis of the pole 2, and the upper flange 31 is wrapped in the plastic 6, as shown in fig. 3. Preferably, the upper portion of the sealing ring 3 is provided with an upper flange 31, the lower portion of the sealing ring 3 is provided with a lower flange 32, the lower flange 32 is in aligned contact with the end of the flange 42, and the upper flange 31 is wrapped in the plastic 6, as shown in fig. 4. In both schemes, a part of the sealing ring 3 is wrapped in the plastic 6, so that the structural stability of the connection between the sealing ring 3 and the plastic 6 is ensured.

The specific operation process is as follows: the conical structure of the sealing surface of the top cover plate is punched and formed, the conical sealing surface of the pole is machined or punched and formed, and a sealing ring with a conical inclined plane is assembled between the top cover plate and the pole; the injection molding plastic is filled into the gaps among the pole, the cover plate and the welding aluminum sheet and is fixed after solidification, so that the sealing surface of the sealing ring is an inclined plane. The mode that the contact surface through sealing washer and top cap and utmost point post is the inclined plane for under the condition of same compression capacity, reduce the sealing washer to the sealed face of apron, utmost point post or the reaction force of plastic, thereby reduce the risk of top cap seal inefficacy.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without the technical solutions of the present invention, or the present invention can be directly applied to other occasions without the improvements, and all are within the protection scope of the present invention.

Claims

1. A secondary battery top cap seal structure which characterized in that: including top cap piece (1), utmost point post (2) and sealing washer (3), be equipped with on top cap piece (1) and supply I (11) of through-hole that utmost point post (2) passed, through-hole I (11) are the toper structure, and sealing washer (3) are the toper, and utmost point post (2) also are the toper with sealing washer (3) complex one end, and sealing washer (3) are the inclined plane with the contact surface of through-hole I (11), and utmost point post (2) also are the inclined plane with the contact surface of sealing washer (3).

2. A secondary battery top cap sealing structure according to claim 1, wherein: the secondary battery top cap still includes lower plastic (4), is equipped with through-hole II (41) that correspond with through-hole I (11) down on plastic (4), is equipped with turn-ups (42) of upturning around through-hole II (41), and through-hole I (11) joint is on turn-ups (42).

3. A secondary battery top cap sealing structure according to claim 2, wherein: the outer side of the upper flanging (42) of the lower plastic (4) is provided with an inclined plane matched with the conical structure of the through hole I (11), and the conical structure of the through hole I (11) is attached to the inclined plane on the outer side of the flanging (42).

4. A secondary battery top cap sealing structure according to claim 2 or 3, wherein: the sealing structure further comprises a welding aluminum sheet (5), and the welding aluminum sheet (5) is sleeved on the periphery of the pole (2) and welded on the top cover plate (1).

5. A secondary battery top cap sealing structure according to claim 4, wherein: seal structure still includes plastic (6), and top cap piece (1), lower plastic (4), utmost point post (2), sealing washer (3) and welding aluminum sheet (5) are changeed and are joined in marriage the completion back, go up utmost point post (2) on top cap piece (1) and mould plastics on every side, and plastic (6) solidify around utmost point post (2), and welding aluminum sheet (5) are wrapped up in plastic (6).

6. A secondary battery top cap sealing structure according to claim 5, wherein: be equipped with on the side of utmost point post (2) along the circumferencial direction and be equipped with the recess, during the injection molding, plastic (6) solidify in the arch around recess and recess with utmost point post (2) interlock.

7. A secondary battery top cap sealing structure according to claim 1, wherein: the upper portion of sealing washer (3) is equipped with turn-ups (31), and turn-ups (31) are parallel with the axis of utmost point post (2), and turn-ups (31) parcel is in plastic (6).

8. A secondary battery top cap sealing structure according to claim 2, wherein: the upper portion of the sealing ring (3) is provided with an upper flanging (31), the lower portion of the sealing ring (3) is provided with a lower flanging (32), the lower flanging (32) is in aligned contact with the end portion of the flanging (42), and the upper flanging (31) is wrapped in the plastic (6).