CN205211823U

CN205211823U - Safety valve

Info

Publication number: CN205211823U
Application number: CN201521026693.8U
Authority: CN
Inventors: 姜利文; 宋毅; 王增忠
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2016-05-04
Anticipated expiration: 2025-12-10

Abstract

The utility model provides a safety valve, including the fixed body and waterproof ventilated membrane. The fixed body is fixed to be set up in the outside of battery package, has: the recess sets up in the middle part of fixed internal side, point portion sets up in the recess, and a plurality of fixed body and function through -holes, the through fixed body communicates with the recess to communicate with outside atmosphere. Waterproof ventilated membrane is fixed to be set up and spaced apart and seal the recess in the fixed body and with point portion, outside that the inside and the battery of battery package wrapped via waterproof ventilated membrane and a plurality of fixed body and function through -holes and gaseous intercommunication. The utility model discloses a safety valve can balance the atmospheric pressure of battery package inside and outside, prevents that the battery package warp, breaks, and leads to inside atmospheric pressure sharply to increase when battery package thermal runaway, and the point portion of the outside expansion of waterproof ventilated membrane and the fixed body of contact is punctureed by point portion, puncture behind the waterproof ventilated membrane battery wrap inside gas can via the recess and it is outside that battery package is discharged rapidly to a plurality of fixed body and function through -holes, prevents the explosion of battery package.

Description

Safety valve

Technical field

The utility model relates to power brick security fields, particularly relates to a kind of safety valve.

Background technology

The battery inner in the process stored and use of power brick can produce gas, and power brick is prevent extraneous dust and liquid from entering and airtight, the air pressure of power brick inside can be caused like this to increase, cause power brick distortion, break; When power brick generation thermal runaway, the gas of power brick inside cannot be discharged in time, causes power brick to be blasted.

Utility model content

In view of Problems existing in background technology, the purpose of this utility model is to provide a kind of safety valve, the air pressure of its energy balancing battery bag inside and outside, prevents power brick to be out of shape, to break, can discharge internal gas simultaneously, avoid power brick to explode when power brick is out of control.

To achieve these goals, the utility model provides a kind of safety valve, and it comprises fixed body and waterproof ventilated membrane.

Fixed body is fixedly installed on the outside of power brick, has: groove, is arranged at the middle part inside fixed body; Tip, is arranged in groove; And multiple fixed body through hole, run through fixed body and be communicated with groove, to be communicated with outside atmosphere.

Waterproof ventilated membrane is fixedly installed on fixed body and spaced apart and closed by groove with tip, and gas is communicated with via waterproof ventilated membrane and described multiple fixed body through hole for the inside of power brick and the outside of power brick.

The beneficial effects of the utility model are as follows:

According in safety valve of the present utility model, when the air pressure that power brick is inner in the process stored and use increases, inner gas can be discharged to power brick outside via waterproof ventilated membrane, groove and described multiple fixed body through hole, and when the air pressure that power brick is inner in the process stored and use reduces, outside gas can enter power brick inside via described multiple fixed body through hole, groove and waterproof ventilated membrane, like this by the air pressure of waterproof ventilated membrane with regard to energy balancing battery bag inside and outside, power brick is prevented to be out of shape, to break; And when entering outside gas cell bag and being inner, waterproof ventilated membrane can prevent water subsidiary in gas from entering power brick.When power brick due to external force expand, extrude, overcharge, cross put cause thermal runaway time, power brick air pressure inside sharply increases, waterproof ventilated membrane expands outwardly and contacts the tip of fixed body and punctured by tip, after puncturing waterproof ventilated membrane, the gas of power brick inside can be discharged to rapidly power brick outside via groove and described multiple fixed body through hole, prevents power brick from exploding.

Accompanying drawing explanation

Fig. 1 is the stereogram being assemblied in power brick according to safety valve of the present utility model;

Fig. 2 is the exploded view according to safety valve of the present utility model;

Fig. 3 is the end view according to safety valve of the present utility model;

Fig. 4 is the cutaway view that Fig. 3 A-A along the line makes;

Fig. 5 is the opposite side view according to safety valve of the present utility model.

Wherein, description of reference numerals is as follows:

1 fixed body 41 enclosing cover through hole

11 groove 5 drying sheets

12 tip 51 accepting holes

13 fixed body through hole 52 drying sheet through holes

2 waterproof ventilated membrane 6 screening glass

3 sealing ring 61 screening glass through holes

4 enclosing cover P power brick

Embodiment

Describe safety valve of the present utility model in detail with reference to the accompanying drawings.

Referring to figs. 1 through Fig. 5, comprise fixed body 1 and waterproof ventilated membrane 2 according to safety valve of the present utility model.

Fixed body 1 is fixedly installed on the outside of power brick P, has: groove 11, is arranged at the middle part inside fixed body 1; Tip 12, is arranged in groove 11; And multiple fixed body through hole 13, run through fixed body 1 and be communicated with groove 11, to be communicated with outside atmosphere.

Waterproof ventilated membrane 2 is fixedly installed on fixed body 1 and spaced apart and closed by groove 11 with tip 12, and gas is communicated with via waterproof ventilated membrane 2 and described multiple fixed body through hole 13 for the inside of power brick P and the outside of power brick P.

According in safety valve of the present utility model, when the air pressure that power brick P is inner in the process stored and use increases, inner gas can via waterproof ventilated membrane 2, groove 11 and described multiple fixed body through hole 13 are discharged to power brick outside, and when the air pressure that power brick P is inner in the process stored and use reduces, outside gas can via described multiple fixed body through hole 13, it is inner that groove 11 and waterproof ventilated membrane 2 enter power brick P, like this by the air pressure of waterproof ventilated membrane 2 with regard to energy balancing battery bag inside and outside, power brick is prevented to be out of shape, break, and when entering outside gas cell bag P and being inner, waterproof ventilated membrane 2 can prevent water subsidiary in gas from entering power brick P.When power brick P due to external force expand, extrude, overcharge, cross put cause thermal runaway time, power brick P air pressure inside sharply increases, waterproof ventilated membrane 2 expands outwardly and contacts the tip 12 of fixed body 1 and punctured by tip 12, after puncturing waterproof ventilated membrane 2, the gas of power brick P inside can be discharged to rapidly power brick P outside via groove 11 and described multiple fixed body through hole 13, prevents power brick P from exploding.

According in safety valve of the present utility model, in one embodiment, fixed body 1 by being spirally connected, bonding, weld, rivet or be fixed on power brick P.

According in safety valve of the present utility model, in one embodiment, the tip 12 of fixed body 1 is by metal or hard is nonmetal makes.

According in safety valve of the present utility model, in one embodiment, metal is steel, and hard is nonmetal is plastics.

According in safety valve of the present utility model, with reference to Fig. 2 and Fig. 4, in one embodiment, tip 12 is taper.

According in safety valve of the present utility model, in one embodiment, fixed body through hole 13 is circular hole, rectangular opening, diamond hole, elliptical aperture, tri-angle-holed, arcuate socket or waist-shaped hole.

According in safety valve of the present utility model, in one embodiment, waterproof ventilated membrane 2 by welding, bonding, rivet, be spirally connected or be fixed on fixed body 1.

According in safety valve of the present utility model, in one embodiment, waterproof ventilated membrane 2 is single or multiple lift.

According in safety valve of the present utility model, with reference to Fig. 2 and Fig. 4, in one embodiment, described safety valve also comprises: sealing ring 3, be arranged between fixed body 1 and power brick P, inner hollow, the inside of power brick P and the outside of power brick P are via the inside of sealing ring 3, waterproof ventilated membrane 2 and described multiple fixed body through hole 13 and gas is communicated with.Sealing ring 3 can improve the degree of protection (can reach IP67) when described safety valve is arranged on power brick P, prevents moisture from entering power brick P via gap between fixed body 1 and power brick P.

According in safety valve of the present utility model, in one embodiment, sealing ring 3 by welding, bonding, rivet, be spirally connected or be fixed on fixed body 1.

According in safety valve of the present utility model, with reference to Fig. 2 and Fig. 4, in one embodiment, described safety valve also comprises: enclosing cover 4, be fixedly connected on the outside of fixed body 1, via waterproof ventilated membrane 2, described multiple fixed body through hole 13 and enclosing cover through hole 41, gas is communicated with the outside of power brick P to be provided with multiple inside of enclosing cover through hole 41, power brick P be communicated with fixed body through hole 13.

According in safety valve of the present utility model, in one embodiment, enclosing cover through hole 41 is circular hole, rectangular opening, diamond hole, elliptical aperture, tri-angle-holed, arcuate socket or waist-shaped hole.

According in safety valve of the present utility model, in one embodiment, enclosing cover 4 by welding, bonding, rivet, to be spirally connected or clamping is fastened on fixed body 1.

According in safety valve of the present utility model, with reference to Fig. 2, in one embodiment, described safety valve also comprises: drying sheet 5, fixedly be contained in the groove 11 of fixed body 1, via waterproof ventilated membrane 2, described multiple drying sheet through hole 52 and described multiple fixed body through hole 13, gas is communicated with successively to be provided with the outside of inside and the power brick P wearing to make drying sheet 5 to be set in accepting hole 51 on tip 12 and multiple drying sheet through hole 52, power brick P for tip 12.When gas in outside can enter power brick P inside via described multiple fixed body through hole 13, groove 11, described multiple drying sheet through hole 52 and waterproof ventilated membrane 2, drying sheet 5 can moisture in initial absorption gas, prevents moisture from entering in power brick P.

According in safety valve of the present utility model, in one embodiment, drying sheet 5 is made up of absorbent material.

According in safety valve of the present utility model, in one embodiment, described absorbent material is calcium chloride, active carbon or water-absorbing resin.

According in safety valve of the present utility model, in one embodiment, drying sheet through hole 52 is circular hole, rectangular opening, diamond hole, elliptical aperture, tri-angle-holed, arcuate socket or waist-shaped hole.

According in safety valve of the present utility model, in one embodiment, drying sheet 5 by welding, bonding, rivet, be spirally connected or connect and fix in the groove 11 of fixed body 1.

According in safety valve of the present utility model; with reference to Fig. 2 and Fig. 4; in one embodiment; described safety valve also comprises: screening glass 6; be fixedly installed on fixed body 1 and be positioned at the inner side of waterproof ventilated membrane 2; the outside of the inside being provided with multiple screening glass through hole 61, power brick P and power brick P is successively via described multiple screening glass through hole 61, waterproof ventilated membrane 2, described multiple fixed body through hole 13 and gas is communicated with.Screening glass 6 can prevent the finger of staff or metal wire from entering power brick P, avoids causing security incident.

According in safety valve of the present utility model, in one embodiment, screening glass 6 by welding, bonding, rivet, be spirally connected or connect and fix in the groove 11 of fixed body 1.

According in safety valve of the present utility model, in one embodiment, screening glass 6 is formed from steel.

According in safety valve of the present utility model, in one embodiment, screening glass through hole 61 is circular hole, rectangular opening, diamond hole, elliptical aperture, tri-angle-holed, arcuate socket or waist-shaped hole.

Claims

1. a safety valve, is characterized in that, comprising:

Fixed body (1), is fixedly installed on the outside of power brick (P), has:

Groove (11), is arranged at the middle part of fixed body (1) inner side;

Tip (12), is arranged in groove (11); And

Multiple fixed body through hole (13), runs through fixed body (1) and is communicated with groove (11), to be communicated with outside atmosphere; And

Waterproof ventilated membrane (2), be fixedly installed on fixed body (1) and with tip (12) spaced apart and by groove (11) close, gas is communicated with via waterproof ventilated membrane (2) and described multiple fixed body through hole (13) for the inside of power brick (P) and the outside of power brick (P).

2. safety valve according to claim 1, is characterized in that, the tip (12) of fixed body (1) is by metal or hard is nonmetal makes.

3. safety valve according to claim 1, is characterized in that, tip (12) are taper.

4. safety valve according to claim 1, is characterized in that, fixed body through hole (13) is circular hole, rectangular opening, diamond hole, elliptical aperture, tri-angle-holed, arcuate socket or waist-shaped hole.

5. safety valve according to claim 1, is characterized in that, described safety valve also comprises:

Sealing ring (3), be arranged between fixed body (1) and power brick (P), inner hollow, the inside of power brick (P) and the outside of power brick (P) are via the inside of sealing ring (3), waterproof ventilated membrane (2) and described multiple fixed body through hole (13) and gas is communicated with.

6. safety valve according to claim 1, is characterized in that, described safety valve also comprises:

Enclosing cover (4), be fixedly connected on the outside of fixed body (1), be provided with multiple enclosing cover through hole (41) be communicated with fixed body through hole (13), gas is communicated with via waterproof ventilated membrane (2), described multiple fixed body through hole (13) and enclosing cover through hole (41) for the inside of power brick (P) and the outside of power brick (P).

7. safety valve according to claim 6, is characterized in that, enclosing cover through hole (41) is circular hole, rectangular opening, diamond hole, elliptical aperture, tri-angle-holed, arcuate socket or waist-shaped hole.

8. safety valve according to claim 1, is characterized in that, described safety valve also comprises:

Drying sheet (5), fixedly be contained in the groove (11) of fixed body (1), be provided with and wear to make drying sheet (5) to be set in accepting hole (51) on tip (12) and multiple drying sheet through hole (52) for tip (12), via waterproof ventilated membrane (2), described multiple drying sheet through hole (52) and described multiple fixed body through hole (13), gas is communicated with successively for the inside of power brick (P) and the outside of power brick (P).

9. safety valve according to claim 8, is characterized in that, drying sheet (5) is made up of absorbent material.

10. safety valve according to claim 1, is characterized in that, described safety valve also comprises:

Screening glass (6); be fixedly installed on fixed body (1) and be positioned at the inner side of waterproof ventilated membrane (2); be provided with multiple screening glass through hole (61), the inside of power brick (P) and the outside of power brick (P) are successively via described multiple screening glass through hole (61), waterproof ventilated membrane (2), described multiple fixed body through hole (13) and gas is communicated with.