CN2874784Y

CN2874784Y - Anti-explosion cover plate for lithium battery

Info

Publication number: CN2874784Y
Application number: CNU2005201157798U
Authority: CN
Inventors: 王文林
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-25
Filing date: 2005-10-25
Publication date: 2007-02-28
Anticipated expiration: 2015-10-25

Abstract

A lithium battery explosion-proof cover plate comprises a basal body and a conductive pole on the basal body. Stepped holes are also arranged on surface of the basal body, and an explosion-proof diaphragm is embedded inside the stepped hole. A pressure block with a hole in the center is pressed on the explosion-proof diaphragm, and tightly positioned onto inner wall of the stepped hole, in order to form an embedded explosion-proof structure. The utility model of embedded explosion-proof structure is reasonable. That is to say, the explosion-proof diaphragm is laminated inside the basal body, so that ordinary equipment can fulfill the production. Simple technology request and high productivity lowered production cost. Furthermore, small explosion-proof diaphragms are only necessary for use at the stepped hole, in order to greatly reduce consumption of the explosion-proof diaphragms.

Description

Anti-explosion cover plate for lithium battery

Technical field: the utility model relates to the cover plate on a kind of lithium battery housing.

Background technology: better for the fail safe that makes lithium battery, many lithium battery housings use explosion-proof type cover plate, releasing pressure automatically when cell internal pressure is too high.General explosion-proof covering board all is to establish a through hole on matrix, cover one deck rupture pressure disc in the whole surfacing of matrix again, this version is very high to the requirement of production equipment, the complex manufacturing of explosion-proof covering board, common equipment at all can't be smooth overlay film, production cost height, and the usable floor area of rupture pressure disc is big, waste is many, and the efficient of production is low.

Summary of the invention: at the deficiencies in the prior art, the utility model provides anti-explosion cover plate for lithium battery a kind of rational in infrastructure, convenient for production.

The utility model comprises matrix and conductive electrode provided thereon, also is provided with stepped hole at matrix surface, and rupture pressure disc places in the stepped hole, the briquetting of center drilling be pressed in rupture pressure disc top and and stepped hole inner wall sealing close-fitting fix, constitute inserted blast resistance construction.

Inserted blast resistance construction of the present utility model is reasonable, is about to rupture pressure disc and is clipped in the matrix, adopts conventional equipment to produce, and technological requirement is simple, and is highly efficient in productivity, greatly reduces production cost.And, only need significantly reduce the consumption of rupture pressure disc at the rupture pressure disc of stepped hole position use small pieces.

Further specify the utility model below in conjunction with drawings and Examples.

Description of drawings: Fig. 1 is the main structure schematic diagram of embodiment;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the structural representation of stepped hole.

Embodiment: as shown in the figure, matrix 1 is provided with conductive electrode 7, also is provided with stepped hole 3 on matrix 1 surface, and rupture pressure disc 2 places in the stepped hole 3, the briquetting 4 of center drilling be pressed in rupture pressure disc 2 tops and and stepped hole 3 inner wall sealing close-fittings fix, constitute inserted blast resistance construction.During production, the good stepped hole 3 of subpunch is put into rupture pressure disc 2, is inlaid into briquetting 4, and technological requirement is low, and conventional equipment also can be produced.In practice as requested, stepped hole 3 may have multiple shape, and corresponding briquetting 4 shapes also can have multiple, as circular, oval, square, runway shape etc., and present embodiment employing circle.And the shape at briquetting 4 central opening places, size also can be as requested, and be the same or different with stepped hole 3 bottoms.Present embodiment is provided with sealant layer 5 between the contact-making surface of briquetting 4 and stepped hole 3, the sealing of briquetting 4 and stepped hole 3 is better like this.The space that present embodiment is also located above or below rupture pressure disc 2, promptly the center drilling place of briquetting 4 or stepped hole 3 bottoms are filled with colloid 6, constitute the rupture pressure disc overcoat.Can prevent like this transport, produce, process such as use scratches rupture pressure disc 2, improves the lithium battery security reliability.

Claims

1, a kind of anti-explosion cover plate for lithium battery, comprise matrix and conductive electrode provided thereon, it is characterized by: also be provided with stepped hole (3) on matrix (1) surface, rupture pressure disc (2) places in the stepped hole (3), the briquetting of center drilling (4) be pressed in rupture pressure disc (2) top and and stepped hole (3) inner wall sealing close-fitting fix, constitute inserted blast resistance construction.

2, anti-explosion cover plate for lithium battery according to claim 1 is characterized by: be provided with sealant layer (5) between the contact-making surface of briquetting (4) and stepped hole (3).

3, anti-explosion cover plate for lithium battery according to claim 1 and 2 is characterized by: the space of locating above or below rupture pressure disc (2), promptly the center drilling place of briquetting (4) or stepped hole (3) bottom are filled with colloid (6), constitute the rupture pressure disc overcoat.