CN210443604U

CN210443604U - Lithium battery explosion-proof structure

Info

Publication number: CN210443604U
Application number: CN201921746642.0U
Authority: CN
Inventors: 舒江
Original assignee: Shenzhen Huayu New Energy Technology Co Ltd
Current assignee: Shenzhen Huayu New Energy Technology Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-05-01
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a lithium cell explosion-proof structure, including protective housing and lithium cell body, settle in the inside of protective housing has lithium cell body, a left side right side of lithium cell body's upper surface both sides is fixed with positive terminal and negative terminal respectively, and positive terminal and negative terminal all wear out from the upper surface of protective housing, lithium cell body's outer wall is provided with slowly-releasing layer and heat dissipation layer respectively, and sets up along lithium cell body's vertical direction interval between slowly-releasing layer and the heat dissipation layer. This lithium cell explosion-proof construction is equipped with two-layer protection mechanism, and the one deck is with regard to the lithium cell carelessly explodes, and the purpose reduces the explosion danger of lithium cell, and another layer is then with regard to the lithium cell explosion crisis (probably explosion) appears, and the purpose carries out the slowly-releasing of oneself to the pressure in the lithium cell to reduce the heat of lithium cell itself fast, effectively avoid the lithium cell explosion.

Description

Lithium battery explosion-proof structure

Technical Field

The utility model relates to a lithium cell technical field specifically is a lithium cell explosion-proof construction.

Background

The lithium battery is a battery which uses lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution, and the chemical characteristics of the lithium metal are very active, so that the processing, storage and use of the lithium metal have very high requirements on the environment.

The existing lithium battery is small and exquisite and simple in structure, convenient to carry and install, but safety performance is poor, and the lithium battery is in the face of striking, extruding, falling and bumping and the like, if ambient temperature is high, then the lithium battery explodes very easily, so just brings great potential safety hazard for the user, and therefore, we provide an explosion-proof structure of the lithium battery.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof structure of lithium cell to solve the lithium cell that provides in the above-mentioned background art when the circumstances such as bump in the face of striking, extrusion, fall, if ambient temperature is higher, then the problem that the lithium cell explodes very easily.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a lithium battery explosion-proof structure, includes protective housing and lithium cell body, the inside arrangement of protective housing has lithium cell body, a left side right side of lithium cell body's upper surface both sides is fixed with positive terminal and negative terminal respectively, and positive terminal and negative terminal all wear out from the upper surface of protective housing, lithium cell body's outer wall is provided with slowly-releasing layer and heat dissipation layer respectively, and sets up along lithium cell body's vertical direction interval between slowly-releasing layer and the heat dissipation layer.

Preferably, the protective housing includes fretwork casing, inflation glue film and hollow layer, and cuts off between fretwork casing and the inflation glue film and have the hollow layer, the inflation glue film cover is established in the outside of lithium cell body, and the outside on inflation glue film is fixed with the fretwork casing.

Preferably, the slow release layer and the heat dissipation layer on the front side and the back side of the lithium battery body are arranged in a staggered mode with the slow release layer and the heat dissipation layer on the left side face and the right side face of the lithium battery body, and the length of the heat dissipation layer is larger than that of the slow release layer.

Preferably, the slow release layer comprises a fixed plate and a slow release rubber sheet, the slow release rubber sheet is arranged and fixed in the center of the plate surface of the fixed plate, and the slow release rubber sheet is sequentially connected in the horizontal direction.

Preferably, the heat dissipation plate is fixed in the middle of the heat dissipation layer, and the heat dissipation plates are arranged at equal intervals along the horizontal direction of the heat dissipation layer.

Preferably, the heat dissipation plate is disposed to be inclined outward with respect to a horizontal direction of the heat dissipation layer, and the inclination angle of the heat dissipation plate is 30 °.

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

1. this lithium cell explosion-proof construction is equipped with two-layer protection mechanism, and the one deck is with regard to the lithium cell carelessly explodes, and the purpose reduces the explosion danger of lithium cell, and another layer is then with regard to the lithium cell explosion crisis (probably explosion) appears, and the purpose carries out the slowly-releasing of oneself to the pressure in the lithium cell to reduce the heat of lithium cell itself fast, effectively avoid the lithium cell explosion.

2. The hollow shell is used for the heat dissipation, and the hollow layer is used for cutting off hollow shell and inflation glue film, and the inflation glue film adopts the rubber material, has elasticity, and when inside lithium cell body explodes carelessly, the inflation glue film can expand in response to the force effect, and the hollow layer has just given the inflation glue film and has reserved sufficient inflation space, and the inflation glue film absorbs stress and inflation to the explosion influence has been reduced effectively.

3. The slowly-releasing layer is used for slowly-releasing lithium cell body internal pressure, and when the explosion crisis appeared at lithium cell body, this internal electrolyte pressure of lithium cell must increase to can oppress lithium cell body's wall body, and slowly-releasing rubber piece then can utilize this pressure, slowly-releasing rubber piece can outwards expand under the pressure effect promptly, borrow this internal pressure of alleviating lithium cell, this internal atress of effective balance lithium cell avoids lithium cell body to take place the explosion danger.

4. The heating panel adopts the good copper aluminium alloy material preparation of heat conductivity to form, can come out the produced heat conduction of lithium cell body to help thermal giving off, and the slope setting of heating panel has increased the heat radiating area of heating panel, helps improving the radiating efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of a lithium battery body of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

fig. 4 is an enlarged schematic structural diagram of the point B in fig. 1 according to the present invention.

In the figure: 1. a protective shell; 2. hollowing out the shell; 3. an expansion glue layer; 4. a hollow layer; 5. a lithium battery body; 501. a positive terminal; 502. a negative terminal; 6. a sustained release layer; 7. a fixing plate; 8. a sustained release rubber sheet; 9. a heat dissipation layer; 10. a heat sink.

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.

Referring to fig. 1-4, the present invention provides a technical solution: an explosion-proof structure of a lithium battery comprises a protective shell 1 and a lithium battery body 5, wherein the protective shell 1 comprises a hollowed-out shell 2, an expansion glue layer 3 and a hollow layer 4, the hollow layer 4 is separated between the hollowed-out shell 2 and the expansion glue layer 3, the expansion glue layer 3 covers the outer side of the lithium battery body 5, the hollowed-out shell 2 is fixed on the outer side of the expansion glue layer 3, the hollowed-out shell 2 is used for dissipating heat, the hollow layer 4 is used for separating the hollowed-out shell 2 and the expansion glue layer 3, the expansion glue layer 3 is made of rubber and has elasticity, when the internal lithium battery body 5 explodes carelessly, the expansion glue layer 3 expands under the action of stress, the hollow layer 4 reserves a sufficient expansion space for the expansion glue layer 3, and the expansion glue layer 3 absorbs the stress to expand, so that the explosion;

a lithium battery body 5 is arranged in the protective shell 1, a positive terminal 501 and a negative terminal 502 are respectively fixed on one left side and one right side of the two sides of the upper surface of the lithium battery body 5, the positive terminal 501 and the negative terminal 502 penetrate out of the upper surface of the protective shell 1, a slow release layer 6 and a heat dissipation layer 9 are respectively arranged on the outer wall of the lithium battery body 5, the slow release layer 6 and the heat dissipation layer 9 are arranged at intervals along the vertical direction of the lithium battery body 5, the slow release layer 6 and the heat dissipation layer 9 on the front and back surfaces of the lithium battery body 5 and the slow release layer 6 and the heat dissipation layer 9 on the left and right side surfaces of the lithium battery body 5 are staggered, the length of the heat dissipation layer 9 is greater than that of the slow release layer 6, and the slow release layer 6 and the heat dissipation layer 9 on the front and back surfaces and the left and right side surfaces are staggered, so that the lithium battery body 5 has, the heat dissipation layer 9 is longer than the slow release layer 6, and is beneficial to quickly dissipating the temperature in the lithium battery body 5 outwards;

the slow release layer 6 comprises a fixing plate 7 and a slow release rubber sheet 8, the slow release rubber sheet 8 is arranged and fixed in the center of the plate surface of the fixing plate 7 in a communicated mode, the slow release rubber sheet 8 is sequentially connected in the horizontal direction, the slow release layer 6 is used for slowly releasing the pressure in the lithium battery body 5, when the lithium battery body 5 is in explosion crisis, the pressure of electrolyte in the lithium battery body 5 is increased inevitably, so that the wall body of the lithium battery body 5 can be pressed, the slow release rubber sheet 8 can utilize the pressure, namely, the slow release rubber sheet 8 expands outwards under the action of the pressure, so that the pressure in the lithium battery body 5 is relieved, the stress in the lithium battery body 5 is effectively balanced, and the explosion danger of the lithium battery body;

the centre of heat dissipation layer 9 is fixed with heating panel 10, and heating panel 10 arranges along the horizontal direction equidistance of heat dissipation layer 9, heating panel 10 adopts the good copper aluminium alloy material preparation of heat conductivity to form, can come out the produced heat conduction of lithium cell body 5, thereby help thermal giving off, heating panel 10 leans out the setting about the horizontal direction of heat dissipation layer 9, and heating panel 10's inclination is 30, heating panel 10's slope sets up, the heat radiating area of heating panel 10 has been increased, help improving the radiating efficiency.

The working principle is as follows: for such an explosion-proof structure of the lithium battery, a safety protection mechanism is arranged on the protection shell 1, and the safety protection mechanism aims at the situation that the lithium battery body 5 is exploded carelessly (cannot be avoided), firstly, the lithium battery body 5 is supposed to be exploded, after the lithium battery body 5 is exploded, impact force is formed outwards, the impact force acts on the expansion glue layer 3, so that the expansion glue layer 3 expands, and the expansion glue layer 3 absorbs the impact force, so that the explosion risk degree is reduced;

this explosion-proof structure of lithium cell can guarantee that lithium cell 5 does not explode under normal conditions, because be provided with slowly-releasing layer 6 and heat dissipation layer 9 on lithium cell 5, the required condition of explosion has that lithium cell 5 internal pressure is great and lithium cell 5 heat production is great two kinds, when lithium cell 5 internal pressure is great, electrolyte pressure increases, and oppress lithium cell 5's wall body, at this in-process, pressure makes the outside inflation of slowly-releasing rubber piece 8 on the slowly-releasing layer 6 outstanding, so alright buffer pressure, and the heating panel 10 of lithium cell 5 outer wall adopts the good copper aluminum alloy material of heat conductivity to prepare to form, the event can come out the produced heat conduction of lithium cell 5, thereby effectively dispel the heat.

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 structure of lithium cell, includes protective housing (1) and lithium cell body (5), its characterized in that: the lithium battery pack is characterized in that a lithium battery body (5) is arranged in the protective shell (1), a positive terminal (501) and a negative terminal (502) are fixed on the left side and the right side of the two sides of the upper surface of the lithium battery body (5) respectively, the positive terminal (501) and the negative terminal (502) penetrate out of the upper surface of the protective shell (1), a slow release layer (6) and a heat dissipation layer (9) are arranged on the outer wall of the lithium battery body (5) respectively, and the slow release layer (6) and the heat dissipation layer (9) are arranged at intervals in the vertical direction of the lithium battery body (5).

2. The explosion-proof structure of a lithium battery as claimed in claim 1, wherein: protective housing (1) includes fretwork casing (2), inflation glue film (3) and hollow layer (4), and cuts off between fretwork casing (2) and inflation glue film (3) and have hollow layer (4), inflation glue film (3) cover is established in the outside of lithium cell body (5), and the outside of inflation glue film (3) is fixed with fretwork casing (2).

3. The explosion-proof structure of a lithium battery as claimed in claim 1, wherein: the lithium battery is characterized in that the slow release layer (6) and the heat dissipation layer (9) on the front side and the back side of the lithium battery body (5) are arranged in a staggered mode with the slow release layer (6) and the heat dissipation layer (9) on the left side face and the right side face of the lithium battery body (5), and the length of the heat dissipation layer (9) is larger than that of the slow release layer (6).

4. The explosion-proof structure of a lithium battery as claimed in claim 1, wherein: the slow release layer (6) comprises a fixing plate (7) and a slow release rubber sheet (8), the slow release rubber sheet (8) is arranged at the center of the plate surface of the fixing plate (7) in a communicating mode and is fixed on the center of the plate surface, and the slow release rubber sheet (8) is sequentially connected in the horizontal direction.

5. The explosion-proof structure of a lithium battery as claimed in claim 1, wherein: the middle of the heat dissipation layer (9) is fixed with heat dissipation plates (10), and the heat dissipation plates (10) are arranged at equal intervals along the horizontal direction of the heat dissipation layer (9).

6. The explosion-proof structure of a lithium battery as claimed in claim 5, wherein: the heat dissipation plate (10) is arranged in an outward inclined manner relative to the horizontal direction of the heat dissipation layer (9), and the inclination angle of the heat dissipation plate (10) is 30 degrees.