CN210926070U

CN210926070U - Explosion-proof type plastic-sealed lithium battery

Info

Publication number: CN210926070U
Application number: CN201922496280.0U
Authority: CN
Inventors: 李靖
Original assignee: Guangdong Xupai Lithium Energy Co ltd
Current assignee: Guangdong Xupai Lithium Energy Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-03
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an explosion-proof type plastic envelope lithium cell, including battery body and explosion-proof shell, battery body's outside is provided with the heat absorbing material layer, is provided with flame retardant material layer on the outer wall of heat absorbing material layer, and battery body's upper end symmetric connection has positive negative pole, and heat absorbing material layer and flame retardant material layer are run through to the upper end of positive negative pole, the corner of explosion-proof shell inner wall is equipped with the shock pad, and the right angle groove has been seted up to one side of shock pad. This explosion-proof type plastic envelope lithium cell, through connect flame retardant material layer on the outer wall on heat absorbing material layer, can stop the burning to a certain extent, utilize the heating panel to absorb the heat on the flame retardant material layer, and with heat conduction to explosion-proof shell on, accelerate the heat and give off, prevent the high temperature explosion, set up the trapezoidal explosion-proof groove of falling more to do benefit to pressure diffusion in addition on explosion-proof lid, can improve sealed effect simultaneously, under expanding spring's effect, slide and explosion-proof groove tightly block play sealed effect.

Description

Explosion-proof type plastic-sealed lithium battery

Technical Field

The utility model relates to a lithium cell technical field specifically is an explosion-proof type plastic envelope lithium cell.

Background

The lithium battery has the advantages of light weight, small volume, large capacitance, high charging speed and the like, and is widely applied to various products including household appliances and electric vehicles. However, the lithium battery often generates heat, burns and even explodes in the using process, the existing lithium battery has no explosion-proof characteristic, and once the lithium battery is overcharged, the lithium battery is easy to cause fire and explosion accidents in the using process, so that the life safety of people is directly harmed, light people influence the use of a host, and serious people can also burn the host to cause fire, unnecessary loss is caused, and the life and property safety of users is threatened. In recent years, many household fire accidents have occurred due to the heat-generating combustion of lithium batteries.

Chinese patent CN208256775U discloses an explosion-proof lithium battery, which comprises a lithium battery body, positive and negative electrode columns, an explosion-proof shell and an explosion-proof shell cover, wherein the lithium battery body is arranged in the explosion-proof shell, the upper part of the explosion-proof shell is provided with an opening and is provided with the explosion-proof shell cover, and the explosion-proof shell is connected with the explosion-proof shell cover through an insulating sealing ring; the lithium battery body is connected with the inner surface of the explosion-proof shell through a fastener, and a carbonate explosion-proof layer which can generate endothermic reaction and carbon dioxide when being heated is filled in a gap between the lithium battery body and the explosion-proof shell; the explosion-proof shell cover is provided with a blast hole which is a blind hole, the bottom of the blast hole is provided with a blast membrane, and the blast membrane is provided with an annular groove. The utility model discloses a beneficial effect is: the safety protection performance of the lithium battery is greatly improved, and the use safety risk of the battery is reduced.

Although this application has solved the problem in the background art to a certain extent, adopt the heat absorption of carbonate explosion-proof layer to produce carbon dioxide in this application, play certain hindrance effect to the heat dissipation, be unfavorable for the heat dissipation, and utilize the rupture membrane to play the pressure release effect, difficult installation behind the rupture membrane breakage, explosion-proof cap breakage back injures the people easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof type plastic envelope lithium cell has explosion-proof effectual, and the problem among the prior art has been solved to the advantage of easy pressure release.

In order to achieve the above object, the utility model provides a following technical scheme: an explosion-proof plastic-sealed lithium battery comprises a battery body and an explosion-proof shell, wherein a heat absorption material layer is arranged outside the battery body, a flame-retardant material layer is arranged on the outer wall of the heat absorption material layer, positive and negative poles are symmetrically connected to the upper end of the battery body, the heat absorption material layer and the flame-retardant material layer are penetrated through the upper ends of the positive and negative poles, a shock pad is arranged at the corner of the inner wall of the explosion-proof shell, a right-angle groove is formed in one side of the shock pad and is connected with the corner of the flame-retardant material layer in a clamping manner, an explosion-proof cover is connected to the upper end of the explosion-proof shell through a sealing ring, an explosion-proof groove is formed in the lower surface of the explosion-proof cover, a sliding plate is movably connected in the explosion-proof groove, a telescopic spring is symmetrically connected to the upper surface of the sliding plate, a pressure relief opening, one end of the protective cover is connected with a buckle, the buckle is buckled with the explosion-proof cover, a rubber pad is connected to the inner wall of the protective cover, and a through hole is formed in the upper end of the protective cover.

Preferably, the outer wall of the flame retardant material layer is equidistantly connected with a heat dissipation plate.

Preferably, the lower surface of the inner wall of the protective cover is connected with a thimble, the thimble penetrates through the rubber pad, and the thimble is arranged right above the pressure relief ball.

Preferably, the inner wall of the rubber pad is connected with a rubber touch strip.

Preferably, the explosion-proof groove is of an inverted trapezoidal structure, and the sliding plate is clamped with the explosion-proof groove.

Preferably, the lower end of the pressure relief pipe extends into the explosion-proof groove, and the lower end of the pressure relief pipe is provided with a vent hole.

Compared with the prior art, the beneficial effects of the utility model are as follows:

this explosion-proof type plastic envelope lithium cell, through connect flame retardant material layer on the outer wall on heat absorbing material layer, can prevent the burning to a certain extent, utilize the heating panel to absorb the heat on the flame retardant material layer, and conduct the heat to explosion-proof housing, accelerate the heat give off, prevent the high temperature explosion, set up the explosion-proof groove of falling trapezoidal more to do benefit to pressure diffusion in addition on explosion-proof lid, can improve sealed effect simultaneously, under expanding spring's effect, slide and explosion-proof groove tightly block, play sealed effect, when internal pressure is too big, promote the slide and shift up, explosion-proof groove is opened, play the pressure release effect, high durability and convenient use, play secondary seal effect through the pressure release ball, the protective cover can prevent that pressure from too big causing explosion-proof lid to break and hinder the people, the security is higher.

Drawings

FIG. 1 is an overall structure diagram of the present invention;

FIG. 2 is an enlarged view of A of the present invention;

fig. 3 is a structural view of the pressure relief pipe of the present invention.

In the figure: 1. a battery body; 11. a heat absorbing material layer; 12. a layer of flame retardant material; 121. a heat dissipation plate; 13. positive and negative pole columns; 2. an explosion-proof housing; 21. a shock pad; 211. a right-angle groove; 3. an explosion-proof cover; 31. an explosion-proof groove; 311. a pressure relief port; 32. a slide plate; 33. a tension spring; 34. a pressure relief pipe; 341. looping; 342. a pressure relief ball; 343. a vent hole; 35. a protective cover; 351. buckling; 352. a rubber pad; 353. a through hole; 354. and (4) a thimble.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1, an explosion-proof type plastic-sealed lithium battery, including battery body 1 and explosion-proof housing 2, the outside of battery body 1 is provided with heat absorbing material layer 11, be provided with flame retardant material layer 12 on the outer wall of heat absorbing material layer 11, equidistant heating panel 121 that is connected with on the outer wall of flame retardant material layer 12, heating panel 121 absorbs the heat on the flame retardant material layer 12, and conduct the heat to explosion-proof housing 2, accelerate heat dissipation, the upper end symmetric connection of battery body 1 has positive and negative utmost point post 13, the upper end of positive and negative utmost point post 13 runs through heat absorbing material layer 11 and flame retardant material layer 12, the corner of explosion-proof housing 2 inner wall is equipped with shock pad 21, right-angle groove 211 has been seted up to one side of shock pad 21, right-angle groove 211 is connected with the corner block of flame.

Referring to fig. 2-3, the lower surface of the explosion-proof cover 3 is provided with an explosion-proof groove 31, the explosion-proof groove 31 is movably connected with a sliding plate 32, the upper surface of the sliding plate 32 is symmetrically connected with an expansion spring 33, the explosion-proof groove 31 is of an inverted trapezoidal structure, the sliding plate 32 is clamped with the explosion-proof groove 31, under the action of the expansion spring 33, the sliding plate 32 is tightly clamped with the explosion-proof groove 31 to play a role of sealing, when the internal pressure is too high, the sliding plate 32 is pushed to move upwards, the explosion-proof groove 31 is opened to play a role of pressure relief, the inverted trapezoidal explosion-proof groove 31 is more beneficial to pressure diffusion, meanwhile, the sealing effect can be improved, the upper end of the explosion-proof groove 31 is provided with a pressure relief opening 311, a pressure relief pipe 34 penetrates through the pressure relief opening 311, the upper end of the pressure relief pipe 34 is connected with a sleeve opening 341, a pressure relief ball 342 is sleeved on the sleeve opening 341, the pressure relief ball 342 is a common, the lower end of the pressure relief pipe 34 extends into the explosion-proof groove 31, the lower end of the pressure relief pipe 34 is provided with a vent hole 343, when the sliding plate 32 moves upwards to the position of the pressure relief pipe 34, the inlet of the pressure relief pipe 34 is blocked, the vent hole 343 is used for pressure relief, the explosion-proof cover 3 above the explosion-proof groove 31 is hinged with a protective cover 35, one end of the protective cover 35 is connected with a buckle 351, the buckle 351 is buckled with the explosion-proof cover 3, the inner wall of the protective cover 35 is connected with a rubber pad 352, the inner wall of the rubber pad 352 is connected with a rubber contact strip, the rubber contact strip and the rubber pad 352 both play a buffering role, when the explosion-proof groove 31 is broken by overlarge pressure in the explosion-proof shell 2, the protective cover 35 prevents debris from hurting people, the rubber contact strip and the rubber pad 352 buffer the impact force of the debris, the upper end of the protective cover 35 is provided with a through hole 353, when pressure relief ball 342 is filled, contact with spike 354 may puncture spike 354, thereby assisting in venting pressure from explosion proof housing 2.

The working process is as follows: when the anti-explosion device is used, the positive pole 13 and the negative pole 13 are communicated with an electric appliance to supply power to the electric appliance, the heat absorbing material layer 11 absorbs heat generated by the battery during working, the flame retardant material layer 12 can stop burning to a certain extent, the shock absorption pad 21 plays a role in fixing and shock absorption on the battery body 1 to prevent the battery body 1 from shaking, the heat dissipation plate 121 absorbs the heat on the flame retardant material layer 12 and conducts the heat to the anti-explosion shell 2 to accelerate heat dissipation, the sliding plate 32 is clamped with the anti-explosion groove 31, the sliding plate 32 is tightly clamped with the anti-explosion groove 31 under the action of the expansion spring 33 to play a sealing role, when the internal pressure is overlarge, the sliding plate 32 is pushed to move upwards, the anti-explosion groove 31 is opened to play a pressure relief role, the inverted trapezoidal anti-explosion groove 31 is more beneficial to pressure diffusion, meanwhile, the sealing effect can be improved, when the sliding plate 32 moves upwards to the opening of, when the pressure relief ball 342 is filled, the pressure relief ball contacts the thimble 354 to puncture the thimble 354, so as to help the pressure of the explosion-proof housing 2 to escape, when the pressure in the explosion-proof housing 2 is too high to burst the explosion-proof groove 31, the protecting cover 35 prevents the debris from hurting people, and the rubber contact strip and the rubber pad 352 buffer the impact force of the debris.

In summary, the following steps: this explosion-proof type plastic-sealed lithium cell, through connect flame retardant material layer 12 on the outer wall at heat absorbing material layer 11, can stop the burning to a certain extent, utilize heating panel 121 to absorb the heat on flame retardant material layer 12, and conduct the heat to explosion-proof housing 2 on, accelerate heat dissipation, prevent the high explosion of high temperature, set up the trapezoidal explosion-proof groove 31 of falling more to be favorable to pressure diffusion on explosion-proof lid 3 in addition, can improve sealed effect simultaneously, under expanding spring 33's effect, slide 32 and explosion-proof groove 31 tightly block, play sealed effect, when internal pressure is too big, promote slide 32 and move up, explosion-proof groove 31 is opened, play the pressure release effect, high durability and convenient use, play secondary seal effect through pressure release ball 342, protective cover 35 can prevent that pressure is too big to cause explosion-proof lid 3 to break and hinder the people, the security is higher.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an explosion-proof type plastic envelope lithium cell, includes battery body (1) and explosion-proof housing (2), its characterized in that: the battery is characterized in that a heat absorbing material layer (11) is arranged outside the battery body (1), a flame retardant material layer (12) is arranged on the outer wall of the heat absorbing material layer (11), positive and negative poles (13) are symmetrically connected to the upper end of the battery body (1), the heat absorbing material layer (11) and the flame retardant material layer (12) are penetrated through the upper ends of the positive and negative poles (13), shock pads (21) are arranged at corners of the inner wall of the explosion-proof shell (2), right-angle grooves (211) are formed in one side of each shock pad (21), the right-angle grooves (211) are connected with corners of the flame retardant material layer (12) in a clamping manner, an explosion-proof cover (3) is connected to the upper end of the explosion-proof shell (2) through sealing rings, an explosion-proof groove (31) is formed in the lower surface of the explosion-proof cover (3), a sliding plate (32) is movably connected in the explosion-, run through in pressure release mouth (311) and have pressure release pipe (34), the upper end of pressure release pipe (34) is connected with linking (341), the cover has pressure release ball (342) on linking (341), the hinge is connected with protective cover (35) on explosion-proof lid (3) of explosion-proof groove (31) top, the one end of protective cover (35) is connected with buckle (351), buckle (351) and explosion-proof lid (3) lock, be connected with rubber pad (352) on the inner wall of protective cover (35), through-hole (353) have been seted up to the upper end of protective cover (35).

2. An explosion-proof plastic-encapsulated lithium battery as claimed in claim 1, wherein: the outer wall of the flame-retardant material layer (12) is equidistantly connected with a heat dissipation plate (121).

3. An explosion-proof plastic-encapsulated lithium battery as claimed in claim 1, wherein: the lower surface of the inner wall of the protective cover (35) is connected with a thimble (354), the thimble (354) penetrates through the rubber pad (352), and the thimble (354) is arranged right above the pressure relief ball (342).

4. An explosion-proof plastic-encapsulated lithium battery as claimed in claim 1, wherein: the inner wall of the rubber pad (352) is connected with a rubber touch strip.

5. An explosion-proof plastic-encapsulated lithium battery as claimed in claim 1, wherein: the anti-explosion groove (31) is of an inverted trapezoidal structure, and the sliding plate (32) is clamped with the anti-explosion groove (31).

6. An explosion-proof plastic-encapsulated lithium battery as claimed in claim 1, wherein: the lower end of the pressure relief pipe (34) extends into the explosion-proof groove (31), and the lower end of the pressure relief pipe (34) is provided with a vent hole (343).