CN215816075U

CN215816075U - Top cover assembly and battery

Info

Publication number: CN215816075U
Application number: CN202121951733.5U
Authority: CN
Inventors: 张万财; 徐卫东; 张男; 易梓琦
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-11
Anticipated expiration: 2031-08-19

Abstract

The utility model discloses a top cover assembly and a battery, comprising: the cover plate is provided with a liquid injection hole; the conductive piece is arranged on the cover plate and is arranged at an interval with the liquid injection hole; the insulating part is arranged between the conductive part and the cover plate, and a convex separation part is arranged on one side, facing the liquid injection hole, of the conductive part. Through set up separation portion on the insulating part, will annotate liquid hole and electrically conductive piece and separate for when electrolyte spills over, separation portion can be with the electrolyte separation, avoids electrolyte to contact electrically conductive piece and causes electrically conductive piece to corrode.

Description

Top cover assembly and battery

Technical Field

The utility model relates to the technical field of top cover assemblies and batteries, in particular to a top cover assembly and a battery.

Background

With the development of modern society and the enhancement of environmental awareness of people, more and more devices select rechargeable secondary batteries as power sources, such as mobile phones, notebook computers, electric tools, electric vehicles, energy storage power stations and the like, which provides a wide space for the application and development of batteries, and therefore, the use safety of the batteries needs to be improved.

In the related art, when the conducting strip of the single battery is exposed outside, the conducting strip is easily oxidized after being exposed for a long time, or when the battery is injected with liquid, the conducting strip is corroded when electrolyte flows out.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the top cover assembly, the liquid injection hole and the conductive piece are separated by the blocking part arranged on the insulating piece, so that when electrolyte overflows, the blocking part can block the electrolyte, and the conductive piece is prevented from being corroded due to the fact that the electrolyte contacts the conductive piece.

The utility model also provides a battery.

A cap assembly according to an embodiment of the first aspect of the utility model, comprising: the cover plate is provided with a liquid injection hole; the conductive piece is arranged on the cover plate and is arranged at an interval with the liquid injection hole; the insulating part is arranged between the conductive part and the cover plate, and a convex separation part is arranged on one side, facing the liquid injection hole, of the conductive part.

According to the top cover assembly provided by the embodiment of the utility model, the liquid injection hole and the conductive piece are separated by the separation part arranged on the insulating piece, so that when electrolyte overflows, the separation part can separate the electrolyte, and the corrosion of the conductive piece caused by the contact of the electrolyte to the conductive piece is avoided.

According to some embodiments of the present invention, the blocking portions are disposed on the insulating member and correspond to different sides of the conductive member.

According to some embodiments of the utility model, the plurality of barriers are connected and form an annular groove around the conductive member, the bottom of the conductive member being received in the annular groove.

According to some embodiments of the utility model, a transition fillet is arranged between two adjacent barriers.

According to some embodiments of the utility model, the projections of the conductive member and the insulating member on the cover plate are both rectangular, and the projection of the conductive member is located within the projection of the insulating member.

According to some embodiments of the present invention, the height of the insulator protruding the cover plate is h1, the height of the conductive member protruding the cover plate is h2, and the h1 and the h2 satisfy the following relation: 2mm < h1 < h 2.

According to some embodiments of the utility model, the conductive sheet is provided with a first pole perforation, the insulating member is provided with a second pole perforation, and the cover plate is provided with a third pole perforation, the first pole perforation, the second pole perforation and the third pole perforation being oppositely disposed.

According to some embodiments of the utility model, the third pole penetration hole has a diameter greater than that of the second pole penetration hole, the insulator being provided with a positioning ring surrounding the second pole penetration hole and projecting towards the bottom, the positioning ring fitting within the third pole penetration hole.

According to some embodiments of the utility model, the cap assembly further comprises: the cover plate is provided with an explosion-proof valve mounting hole, the explosion-proof valve is arranged in the explosion-proof valve mounting hole, and the explosion-proof valve mounting hole and the liquid injection hole are located on two opposite sides of the insulating part.

A battery according to an embodiment of the second aspect of the utility model includes: a housing, one end of which is open; the battery cell is arranged in the shell; the top cover assembly of the above embodiment is disposed on the housing.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a battery according to an embodiment of the present invention;

FIG. 2 is an exploded view of a cap assembly according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a cap assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an insulating member according to an embodiment of the present invention.

Reference numerals:

s, a battery;

100. a cap assembly;

10. a cover plate; 11. a liquid injection hole; 12. a third pole perforation; 13. an explosion-proof valve mounting hole;

20. a conductive member; 21. perforating the first pole;

30. an insulating member; 31. a blocking section; 32. an annular groove; 33. transition fillets; 34. a second pole post perforation; 35. a positioning ring;

40. a pole column; 41. a head portion; 42. a rod portion; 43. a tail portion;

200. a housing; 300. and (5) battery cores.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

The cap assembly 100 according to an embodiment of the present invention will be described below with reference to fig. 1 to 4, and the present invention also proposes a battery S having the cap assembly 100 described above.

As shown in fig. 2 to 3, the cap assembly 100 according to the embodiment of the first aspect of the present invention includes: the liquid injection device comprises a cover plate 10, a conductive piece 20 and an insulating piece 30, wherein the cover plate 10 is provided with a liquid injection hole 11, the conductive piece 20 is arranged on the cover plate 10 and is arranged at a distance from the liquid injection hole 11, and the insulating piece 30 is arranged between the conductive piece 20 and the cover plate 10. The insulating member 30 is sandwiched between the cover plate 10 and the conductive member 20, the cover plate 10 is a metal cover plate, and the insulating member 30 can well perform an insulating function to prevent the conductive member 20 from short-circuiting.

And, the conductive piece 20 and insulating part 30 are set up in the middle of the cover plate 10 relatively, pour the liquid hole 11 to set up in the edge of the cover plate 10, namely pour the interval setting between liquid hole 11 and conductive piece 20, so set up and can dodge the conductive piece 20 in the central department of the cover plate 10, has protected the conductive piece 20 from external destruction, corruption effectively, guarantee the normal function of the conductive piece 20, thus guarantee and improve the security performance of the battery S very well.

Further, as shown in FIGS. 2 to 4, the insulating member 30 is provided with a protruding stopper 31 on the side of the conductive member 20 facing the pour hole 11. Through being provided with separation portion 31 towards annotating liquid hole 11 on insulating part 30, separation portion 31 can be fine separates annotating liquid hole 11 and electrically conductive 20, like this when annotating the liquid, when electrolyte spills over to the end plate in annotating liquid hole 11 on, separation portion 31 can be fine separates electrolyte and electrically conductive 20 to can avoid electrolyte to corrode electrically conductive 20.

Therefore, the insulating member 30 is provided with the blocking part 31 to separate the liquid injection hole 11 from the conductive member 20, so that when the electrolyte overflows, the blocking part 31 can block the electrolyte, and the conductive member 20 is prevented from being corroded due to the contact of the electrolyte with the conductive member 20.

As shown in fig. 2 and 4, the blocking portion 31 may be multiple, and the multiple blocking portions 31 are respectively disposed on the insulating member 30 and respectively correspond to different sides of the conductive member 20. That is to say, the blocking portions 31 may be disposed around different sides of the conductive member 20, so that the circumferential sides of the conductive member 20 are blocked by the blocking portions 31, which may improve the blocking performance of the insulating member 30, further prevent the overflowing electrolyte from contacting the conductive member 20, and thus prevent the electrolyte from corroding the conductive member 20 or causing the short circuit of the battery S. In addition, the blocking portion 31 is disposed around the periphery of the insulating member 30, so that the processing of the blocking portion 31 is facilitated, and the integrity of the cap assembly 100 is improved.

Referring to fig. 2, the plurality of blocking parts 31 are connected, and the plurality of blocking parts 31 form an annular groove 32 surrounding the conductive member 20, and the bottom of the conductive member 20 is received in the annular groove 32. That is to say, a plurality of separation portions 31 surround the conductive member 20 to form an annular groove 32, and the annular groove 32 can separate the conductive member 20 from the cover plate 10, so as to set up, when the electrolyte overflows, the annular groove 32 can be good in separating the electrolyte, and prevent the electrolyte from contacting the conductive member 20, so as to prevent the conductive member 20 from being corroded. In addition, the insulating member 30 surrounds the periphery of the conductive member 20 and the bottom of the conductive member 20, so that the conductive member 20 can be partially insulated to prevent the conductive member 20 from short-circuiting.

Referring to fig. 2, a transition fillet 33 is disposed between two adjacent blocking portions 31. So set up, through set up transition fillet 33 between two adjacent separation portion 31, this can facilitate the processing of insulating part 30. Also, the conductive member 20 fits within the insulator member 30, and thus, the conductive member 20 is also provided with rounded corners at locations corresponding to the transition rounded corners 33. And, the insulating member 30 and the conductive member 20 are disposed at the outer side, and a transition round corner 33 is provided on the insulating member 30, so that the user can be prevented from being cut by the corner.

Wherein, the cap assembly 100 further comprises: and the pole 40, wherein the pole 40 is fixedly connected with the conductive member 20 after penetrating through the cover plate 10, the insulating member 30 and the conductive member 20. Further, utmost point post 40 can be two to be first utmost point post and second utmost point post respectively, the setting of first utmost point post and second utmost point post can make things convenient for electrically conductive 20 and electric equipment 'S electricity to be connected, and, when one in first utmost point post and the second utmost point post damages, first utmost point post or the second utmost point post that does not damage still can continue to use, thereby can promote battery S' S fault-tolerance.

Specifically, the pole 40 includes: the head portion 41, the rod portion 42 and the tail portion 43, wherein the rod portion 42 penetrates through the cover plate 10, the insulator 30 and the conductive member 20, and the tail portion 43 is fixedly connected with the conductive member 20. Further, the conductive member 20 is provided with a mounting step, and the tail portion 43 is in limit fit with the mounting step, so that the pole 40 and the conductive member 20 can be fixedly connected.

Referring to fig. 1 to 3, the projections of the conductive member 20 and the insulating member 30 on the cover plate 10 are both rectangular, and the projection of the conductive member 20 is located within the projection of the insulating member 30. Because utmost point post 40 is provided with two to two utmost point posts 40 all with electrically conductive 20 fixed connection, two utmost point posts 40 set up on electrically conductive 20, set electrically conductive 20 to the rectangle and can make things convenient for two utmost point posts 40 to arrange on electrically conductive 20, two utmost point posts 40 interval settings on the length direction of electrically conductive 20 promptly, so two utmost point post 40 arrange and electrically conductive 20's structure sets up more rationally.

Referring to fig. 3, the height h1 of the insulating member 30 protruding the cover plate 10, the height h2 of the conductive member 20 protruding the cover plate 10, and h1 and h2 satisfy the following relations: 2mm < h1 < h 2. That is, the insulating member 30 is protrudingly provided with respect to the cap plate 10. Specifically, when the height h1 of the insulating member 30 protruding the cap plate 10 is less than 2mm, the height of the insulating member 30 is too low, and when the electrolyte overflows on the cap plate 10, the height of the insulating member 30 is too low, which easily causes the electrolyte to flow to the conductive member 20, causing corrosion of the conductive member 20. Or, when the height h1 of the insulating member 30 protruding the cover plate 10 is greater than h2, the insulating member 30 is too high to easily shield the conductive member 20, so that the conductive member 20 cannot normally leak out, and the electrical connection strength between the conductive member 20 and the electrical equipment is not high. Thus, when the height h1 of the insulating member 30 protruding the cap plate 10 is set between 2-h2, not only the electrolyte is prevented from contacting the conductive member 20, but also the conductive member 20 is normally exposed.

Referring to fig. 2, the conductive sheet is provided with a first pole perforation 21, the insulating member 30 is provided with a second pole perforation 34, the cover plate 10 is provided with a third pole perforation 12, and the first pole perforation 21, the second pole perforation 34, and the third pole perforation 12 are disposed opposite to each other. The pole 40 may pass through the first pole through hole 21, the second pole through hole 34, and the third pole through hole 12 and then be fixedly connected to the conductive member 20. Thus, the first pole through hole 21, the second pole through hole 34 and the third pole through hole 12 are oppositely arranged, so that the pole 40 can be conveniently penetrated.

Referring to fig. 3, the third pole through hole 12 has a diameter greater than that of the second pole through hole 34, and the insulator 30 is provided with a positioning ring 35 surrounding the second pole through hole 34 and protruding toward the bottom, the positioning ring 35 being fitted in the third pole through hole 12. That is to say, insulator 30 is provided with holding ring 35 towards one side of apron 10 to holding ring 35 can cooperate in third pole perforation 12, so set up, not only can make things convenient for the prepositioning of insulator 30 with apron 10, moreover after top cap assembly 100 assembles the completion, holding ring 35 can form the block structure each other with third pole perforation 12, thereby makes insulator 30 can connect firmly in apron 10. Alternatively, a receiving space corresponding to the positioning ring 35 may be formed on the cover plate 10, and the positioning ring 35 may be received in the receiving space.

In addition, the cap assembly 100 further includes: the cover plate 10 of the explosion-proof valve is provided with an explosion-proof valve mounting hole 13, the explosion-proof valve is arranged in the explosion-proof valve mounting hole 13, and the explosion-proof valve mounting hole 13 and the liquid injection hole 11 are positioned on two opposite sides of the insulating piece 30. Wherein, the thickness of the position department that explosion-proof valve and explosion-proof valve mounting hole 13 correspond will be less than the actual thickness of apron 10, so set up, when the inside atmospheric pressure of battery S reached explosion-proof valve' S pressure release value, explosion-proof valve was broken to make explosion-proof valve realize the pressure release function. In addition, as shown in fig. 2, the explosion-proof valve is mounted in the explosion-proof valve mounting hole 13 of the cover plate 10, so that the third pole perforation 12 in the center of the cover plate 10 can be avoided, the space outside the cover plate 10 can be reduced, the explosion-proof valve is effectively protected from being damaged and corroded by the outside, the normal function of the explosion-proof valve is ensured, and the safety performance of explosion-proof and pressure relief of the battery S is well ensured and improved.

A battery S according to an embodiment of the second aspect of the present invention includes: the battery cell assembly comprises a shell 200, a battery cell 300 and the cap assembly 100 of the above embodiment, wherein one end of the shell 200 is open, the battery cell 300 is arranged in the shell 200, and the cap assembly 100 is arranged in the shell 200. The casing 200 can wrap the battery cell 300 well, so that the battery cell 300 is prevented from contacting with external dust and water mist. Also, the cap assembly 100 is disposed at the case 200, so that the cap assembly 100 is engaged with the case 200 to enclose the battery S. Moreover, the insulating member 30 is provided with the blocking portion 31 to separate the liquid injection hole 11 from the conductive member 20, so that when the electrolyte overflows, the blocking portion 31 can block the electrolyte, and the conductive member 20 is prevented from being corroded due to the contact of the electrolyte with the conductive member 20.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A header assembly, comprising:

the cover plate is provided with a liquid injection hole;

the conductive piece is arranged on the cover plate and is arranged at an interval with the liquid injection hole;

the insulating part is arranged between the conductive part and the cover plate, and a convex separation part is arranged on one side, facing the liquid injection hole, of the conductive part.

2. The cap assembly of claim 1, wherein the blocking portion is a plurality of blocking portions, and the blocking portions are respectively disposed on the insulating member and respectively corresponding to different sides of the conductive member.

3. The header assembly of claim 2, wherein a plurality of the barriers are connected and form an annular groove around the conductive member, the bottom portion of the conductive member being received in the annular groove.

4. The header assembly of claim 3, wherein a transition fillet is disposed between adjacent ones of the dams.

5. The lid assembly of claim 3, wherein the conductive member and the insulating member each have a rectangular projection on the lid plate, the projection of the conductive member being within the projection of the insulating member.

6. The cap assembly of claim 1, wherein the insulator protrudes above the cap plate by a height h1, the conductor protrudes above the cap plate by a height h2, and the h1 and the h2 satisfy the relationship: 2mm < h1 < h 2.

7. The header assembly of claim 1, wherein the conductive sheet is provided with a first pole perforation, the insulator is provided with a second pole perforation, the cover plate is provided with a third pole perforation, and the first pole perforation, the second pole perforation and the third pole perforation are oppositely disposed.

8. The header assembly of claim 7, wherein the third pole penetration hole has a diameter greater than a diameter of the second pole penetration hole, the insulator being provided with a retaining ring surrounding the second pole penetration hole and projecting toward the bottom, the retaining ring fitting within the third pole penetration hole.

9. The header assembly of claim 1, further comprising: the cover plate is provided with an explosion-proof valve mounting hole, the explosion-proof valve is arranged in the explosion-proof valve mounting hole, and the explosion-proof valve mounting hole and the liquid injection hole are located on two opposite sides of the insulating part.

10. A battery, comprising:

a housing, one end of which is open;

the battery cell is arranged in the shell;

the cap assembly of any one of claims 1-9, disposed on the housing.