CN201069792Y

CN201069792Y - Chargeable battery diplex explosion-prevention device

Info

Publication number: CN201069792Y
Application number: CNU2007201145287U
Authority: CN
Inventors: 王文林
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-31
Filing date: 2007-08-31
Publication date: 2008-06-04
Anticipated expiration: 2017-08-31

Abstract

The utility model provides a double explosion prevention device of a chargeable battery, which comprises an insulation sheet connected below an explosion prevention through hole of a cover board of the battery; an electrode sheet with overflow holes is connected in the insulation sheet to insulate and separate from the cover board of the battery, a bowl-sunken-shaped explosion prevention sheet is connected over the explosion prevention through hole, a bottom verge of the explosion prevention sheet is conductively and firmly contacted with the electrode sheet, and a stress cannelure is arranged at the bottom of the explosion prevention sheet to form a structure with explosion prevention and rupture prevention. When the inner stress in the battery rises, the explosion prevention sheet of the utility model can be pushed upwards and protruded outwards, and then is separated from but conductively contacted with the electrode sheet, and leads the anode of the battery to be cut from the cathode of the battery; simultaneously, the bottom of the explosion prevention sheet is naturally turned over in the process of outward protruding, the stress cannelure can be broken to reduce the pressure because of the concentrating stress, generates double explosion prevention protection effects of open circuit and reduced pressure; the structure is compact and reasonable, and has high security.

Description

The dual explosion-protection equipment of chargeable battery

Technical field:

The utility model relates to a kind of safety anti-explosive device of chargeable battery.

Background technology:

The cover plate of many chargeable batteries is provided with the safety anti-explosive device, and the pressure release of can breaking when cell internal pressure raises prevents battery explosion.General explosion-protection equipment is to adopt special explosion-proof film, the cost height, and the complex process of smooth overlay film, and in assembling process, be punctured easily.Also some chargeable battery is provided with breaker device now, when cell internal pressure raises with the positive and negative electrode circuit automatic disconnection of battery, prevent that inside battery from continuing to produce electric current and improving pressure, if but the runaway chemical reactions of electrolyte, explosionproof hole equally also must be set again carry out step-down, complex structure, not enough compact and reasonable.

Summary of the invention:

At the deficiencies in the prior art, the utility model provides a kind of compact conformation reasonable, the dual explosion-protection equipment of chargeable battery of the step-down of can opening circuit simultaneously.

The utility model comprises the insulating trip of the explosion-proof through hole below that is connected battery cover board, the electrode slice in carry potential overflow hole is connected in the insulating trip and the battery cover board insulation is isolated, explosion-proof through hole top is connected with bowl-shape recessed burst disk, the bottom of this burst disk and electrode slice conduction are tightly touched, and the bottom boundary place of burst disk is provided with the stress stria, constitutes explosion-proof fault structure.

When the utility model raises at cell internal pressure; burst disk can be by top external drum on the gases at high pressure; breaking away from conduction with electrode slice contacts; the positive and negative electrode circuit of battery is disconnected; burst disk bottom turnover naturally in last drum process simultaneously, stress stria place is can stress concentrated and break and rush down pressure, the open circuit dual explosive-proof protector effect of step-down of generation; compact conformation is reasonable, high safety.

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 schematic diagram of the explosion-proof open mode of Fig. 1.

Embodiment: as shown in Figure 1, insulating trip 3 is connected explosion-proof through hole 8 belows of battery cover board 7, and the electrode slice 1 in carry potential overflow hole 2 is connected in the insulating trip 3 and battery cover board 7 insulation are isolated.Explosion-proof through hole 8 tops are connected with bowl-shape recessed burst disk 5, and the bottom of this burst disk 5 and electrode slice 1 conduction is tightly touched, and the bottom boundary place of burst disk 5 is provided with stress stria 4, constitute explosion-proof fault structure.

When cell internal pressure just often, electrode slice 1, burst disk 5 and battery cover board 7 conductions link and are same electrode, and connect another electrode by load.When cell internal pressure raise, as shown in Figure 2, gas was gone out from the spout hole 2 of electrode slice 1, pushed up on the whole bowl-shape recessed portion with burst disk 5 and heaved, and electrode slice 1 just opens circuit with battery cover board 7 like this, prevented that electrolyte from continuing to produce electric current and improving pressure.The bowl-shape recessed portion of burst disk 5 comprises bottom turnover naturally in last drum process, and stress stria 4 places meeting stress is concentrated and broken, and gas can be discharged step-down from rent, and the protection battery is not because of the hypertonia blast.

The electrode slice 1 of present embodiment also is bowl-shape convex-shaped, and top and burst disk 5 conductions are tightly touched, and are generally conductive solder, and rational in infrastructure like this, burst disk 5 contacts more abundant with electrode slice 1, and resistance is little, and can prevent that the electrolyte corrosion from separating the two contact-making surface.The edge of electrode slice 1 also can be provided with conduction connection handle 6, and the circuit of electrode slice 1 connects when making things convenient for the battery assembling like this.

Claims

1. dual explosion-protection equipment of chargeable battery, the insulating trip that comprises the explosion-proof through hole below that is connected battery cover board, the electrode slice in carry potential overflow hole is connected in the insulating trip and the battery cover board insulation is isolated, it is characterized by: explosion-proof through hole (8) top is connected with bowl-shape recessed burst disk (5), bottom of this burst disk (5) and electrode slice (1) conduction are tightly touched, and the bottom boundary place of burst disk (5) is provided with stress stria (4), constitutes to heave explosion-proof fault structure.

2. the dual explosion-protection equipment of chargeable battery according to claim 1 is characterized by: electrode slice (1) is bowl-shape convex-shaped, and top and burst disk (5) conduction is tightly touched.

3. the dual explosion-protection equipment of chargeable battery according to claim 1 and 2 is characterized by: the edge of electrode slice (1) also is provided with conduction connection handle (6).

4. the dual explosion-protection equipment of chargeable battery according to claim 1 and 2 is characterized by: be conductive solder between burst disk (5) and the electrode slice (1).

5. the dual explosion-protection equipment of chargeable battery according to claim 3 is characterized by: be conductive solder between burst disk (5) and the electrode slice (1).