CN215578670U

CN215578670U - Lithium battery with flame retardant function

Info

Publication number: CN215578670U
Application number: CN202122248230.8U
Authority: CN
Inventors: 何晓辉
Original assignee: Jiangxi Shenchao Energy Technology Co ltd
Current assignee: Jiangxi Shenchao Energy Technology Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-01-18
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses a lithium battery with a flame-retardant function, which comprises a lithium battery shell, a battery assembly and a sealing assembly, wherein a blocking plate is fixed at the right end in the lithium battery shell, a through hole is formed in the surface of the blocking plate, the battery assembly for flame retardance is arranged at the left side of the blocking plate, the battery assembly comprises an installation cavity, a lithium battery body, a flame-retardant belt and a radiating fin, and the lithium battery body is arranged at the middle end in the installation cavity. This lithium cell with fire-retardant function is provided with the gas pocket, the inside sealing plug that all is equipped with of three gas pocket that lithium cell casing upper end was seted up, reach certain intensity when inside atmospheric pressure, the influence of the inflation that receives the gas can strike the sealing plug and make it pop out, and then make inside gas discharge from gas pocket, the too big burning explosion that takes place of prevention inside atmospheric pressure, and the setting up of three gas pocket has effectively avoided single sealing plug and gas pocket to paste the condition that tightly can't pop out mutually, three gas pocket also can be more fast to inside carry out gaseous the emission simultaneously.

Description

Lithium battery with flame retardant function

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a lithium battery with a flame retardant function.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution using lithium metal or a lithium alloy as a positive/negative electrode material, and can be roughly classified into two types: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable.

The lithium battery in the market has the problem that the lithium battery has poor heat dissipation and causes self combustion and explosion, and therefore the lithium battery with the flame retardant function is provided.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a lithium battery with flame retardant function, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a lithium cell with fire-retardant function, includes lithium cell casing, battery pack and seal assembly, the inside right-hand member of lithium cell casing is fixed with the baffler, and the baffler surface has seted up the through-hole, is used for fire-retardant battery pack sets up in the left side of baffler, and battery pack includes installation cavity, lithium cell body, fire-retardant area and fin, the inside middle-end of installation cavity is provided with lithium cell body, and the parcel of the lithium cell body outside has fire-retardant area, lithium cell casing outer end is inlayed and is had the fin, is used for the encapsulation seal assembly sets up in the right side of baffler, and seal assembly is including placing cavity, spout, compression jar and pressure valve, place the cavity and control both ends and seted up the spout, and the inside sliding connection of spout has the compression jar, compression jar upper end left side is provided with the pressure valve.

Preferably, the through holes are symmetrically arranged about the center of the blocking plate, and the blocking plate and the lithium battery shell are integrated.

Preferably, the lithium battery body outer wall connecting surface is laminated with the fire-retardant interior wall connecting surface of taking each other, and fire-retardant area is flexible structure.

Preferably, the structural size of the outer opening of the compression tank is matched with that of the inner opening of the sliding chute, and the number of the sliding chutes is two.

Preferably, the structural size of the outer opening of the compression tank is matched with that of the inner opening of the placing cavity, and two pressure valves are symmetrically arranged on the central position of the compression tank.

Preferably, the battery pack further comprises an air hole and a sealing plug, the upper surface of the lithium battery shell is provided with the air hole, and the sealing plug is connected to the inside of the air hole.

Preferably, the number of the air holes is three, and the air holes are connected with the sealing plug in a clamping manner.

The utility model provides a lithium battery with a flame retardant function, which has the following beneficial effects: the lithium battery with the flame retardant function has the flame retardant effect by setting compressed carbon dioxide gas inside to isolate internal oxygen circulation, and absorbs internal heat during vaporization, so that the use safety of the lithium battery is ensured;

the lithium battery with the flame retardant function is provided with the air holes, the sealing plugs are blocked in the three air holes formed in the upper end of the lithium battery shell, when the internal air pressure reaches a certain strength, the sealing plugs can be impacted to eject out under the influence of expansion of the air, so that the internal air is discharged from the air holes, explosion caused by overlarge internal air pressure is prevented, the situation that a single sealing plug is tightly attached to the air holes and cannot eject out is effectively avoided due to the arrangement of the three air holes, and meanwhile, the three air holes can exhaust the air for the inside more quickly;

the lithium battery with the flame-retardant function is provided with the compression tank, the interior of the placing cavity is connected with the compression tank in a sliding manner, the compression tank can be installed in the placing cavity in an easily sliding manner, a large amount of liquid compressed carbon dioxide is stored in the compression tank, when the compression tank is communicated, the liquid carbon dioxide can be rapidly vaporized to generate a large amount of carbon dioxide gas, and a large amount of heat can be absorbed from the periphery in the process of converting the carbon dioxide into gas from liquid, so that the cooling and cooling effects are achieved, meanwhile, the sprayed carbon dioxide can also fill the interior of the installing cavity, the periphery of the lithium battery body is wrapped to lose oxygen, and the flame-retardant and fire-extinguishing effects are achieved;

this lithium cell with fire-retardant function is provided with fire-retardant area, and lithium cell body outer wall connection face laminates each other with fire-retardant in-band wall connection face, and the parcel of lithium cell body outer end has the flexible fire-retardant area of round, and then carries out fire-retardant protection to lithium cell body.

Drawings

FIG. 1 is a schematic diagram of an internal top view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the seal assembly of the present invention.

In the figure: 1. a lithium battery case; 2. a barrier plate; 3. a through hole; 4. a battery assembly; 401. a mounting cavity; 402. a lithium battery body; 403. a flame retardant tape; 404. a heat sink; 405. air holes; 406. a sealing plug; 5. a seal assembly; 501. a placement chamber; 502. a chute; 503. a compression tank; 504. a pressure valve.

Detailed Description

As shown in fig. 1, a lithium battery with flame retardant function comprises a lithium battery shell 1, a battery assembly 4 and a sealing assembly 5, wherein a barrier plate 2 is fixed at the right end inside the lithium battery shell 1, the surface of the baffle plate 2 is provided with two through holes 3, the two through holes 3 are symmetrically arranged around the center of the baffle plate 2, the baffle plate 2 is integrated with the lithium battery shell 1, the baffle plate 2 is welded inside the lithium battery shell 1, the lithium battery shell 1 is made of aluminum alloy, the barrier plate 2 has good pressure resistance, can play a certain protection effect, is effective in explosion prevention aiming at the accumulation of internal gas, has good heat conduction flame retardant capability and is convenient for heat dissipation of a lithium battery, the barrier plate 2 is used for separating the sealing component 5 and the battery component 4, protect between the two, seted up two through-holes 3 on the baffler 2 simultaneously and be used for communicateing right-hand member seal assembly 5 and battery pack 4.

As shown in fig. 1 and fig. 2, a battery pack 4 for fire retardation is disposed on the left side of the blocking plate 2, and the battery pack 4 includes a mounting cavity 401, a lithium battery body 402, a fire retardation tape 403 and a heat dissipation sheet 404, the inside middle end of the mounting cavity 401 is provided with the lithium battery body 402, the outside of the lithium battery body 402 is wrapped with the fire retardation tape 403, the outer wall connecting surface of the lithium battery body 402 is mutually attached to the inner wall connecting surface of the fire retardation tape 403, the fire retardation tape 403 is of a flexible structure, the outer end of the lithium battery body 402 is wrapped with a circle of flexible fire retardation tape 403, and then fire retardation protection is performed on the lithium battery body 402. Battery pack 4 still includes gas pocket 405 and sealing plug 406, and lithium battery housing 1 upper surface sets up there is the gas pocket 405, gas pocket 405 internal connection has sealing plug 406, gas pocket 405 is provided with threely about lithium battery housing 1 upper surface equidistance, and gas pocket 405 and sealing plug 406 block connection, the inside sealing plug 406 that all blocks up of three gas pocket 405 that lithium battery housing 1 upper end was seted up, reach certain intensity when inside atmospheric pressure, it can strike sealing plug 406 and make it pop out to receive gaseous inflation influence, and then make inside gaseous discharge from gas pocket 405 department, prevent that inside atmospheric pressure is too big to take place the explosion, and the setting up of three gas pocket 405 has effectively avoided single sealing plug 406 and gas pocket 405 to paste the tight condition that can't pop out mutually, three gas pocket 405 also can be more fast to inside gas dissipation. The outer end of the lithium battery shell 1 is embedded with a radiating fin 404.

As shown in fig. 1 and 3, a sealing assembly 5 for encapsulation is disposed on the right side of the blocking plate 2, and the sealing assembly 5 includes a placing cavity 501, a sliding chute 502, two compression tanks 503 and two pressure valves 504, the left and right ends of the placing cavity 501 are provided with the sliding chutes 502, the sliding chutes 502 are slidably connected with the compression tanks 503 inside the sliding chutes 502, the left side of the upper end of the compression tank 503 is provided with the pressure valves 504, the structural size of the outer opening of the compression tank 503 is matched with the structural size of the inner opening of the sliding chute 502, the sliding chutes 502 are provided with two compression tanks 503, the structural size of the outer opening of the compression tank 503 is matched with the structural size of the inner opening of the placing cavity 501, the two pressure valves 504 are symmetrically arranged about the center position of the compression tank 503, the inside of the placing cavity 501 is slidably connected with one compression tank 503, which is easily installed inside the placing cavity 501 in a sliding manner, the compression tank 503 stores a large amount of liquid compressed carbon dioxide, when the compression tanks 503 are communicated, the liquid carbon dioxide is rapidly vaporized, produce a large amount of carbon dioxide gas, and the in-process that carbon dioxide is gaseous by liquid transformation can be to absorbing a large amount of heats from around, play the refrigerated effect of cooling down, inside spun carbon dioxide also can fill installation cavity 401 simultaneously, the parcel makes it lose oxygen around lithium cell body 402, and then plays fire-retardant effect of putting out a fire.

In conclusion, in the lithium battery with the flame retardant function, when in use, firstly, the barrier plate 2 is welded inside the lithium battery shell 1, the lithium battery shell 1 is made of aluminum alloy, and has good pressure resistance and a certain protection effect, and is effective in explosion prevention aiming at the accumulation of internal gas, and on the other hand, the lithium battery shell also has good heat conduction and flame retardant capability, so as to be convenient for heat dissipation of the lithium battery, the barrier plate 2 is arranged to separate the sealing component 5 and the battery component 4 and protect the sealing component and the battery component, meanwhile, the barrier plate 2 is provided with two through holes 3 for communicating the right end sealing component 5 and the battery component 4, when the internal temperature rises or fire breaks out, the inside of the placing cavity 501 is slidably connected with a compression tank 503, a large amount of liquid compressed carbon dioxide is stored inside the compression tank 503, when the left end pressure valve 504 of the compression tank 503 penetrates through the through holes 3, when the pressure of the internal heating gas reaches a certain value, the pressure valve 504 is opened, so that the internal liquid carbon dioxide is flushed into the installation cavity 401, the hydraulic carbon dioxide is rapidly vaporized to generate a large amount of carbon dioxide gas, and a large amount of heat is absorbed from the periphery in the process of converting the carbon dioxide from the liquid state into the gas, so that the effects of cooling and cooling are achieved, meanwhile, the sprayed carbon dioxide also fills the installation cavity 401, the lithium battery body 402 is wrapped with the periphery to lose oxygen, so that the effects of flame retardance and fire extinguishment are achieved, the outer end of the corresponding lithium battery body 402 is wrapped with a circle of flexible flame-retardant tape 403, so that the lithium battery body 402 is subjected to flame-retardant protection, and finally when the internal air pressure reaches a certain strength, the sealing plug 406 blocked inside three air holes 405 formed in the upper end of the lithium battery shell 1 can be impacted by the expansion of the gas to eject the lithium battery shell, and then make inside gas discharge from gas pocket 405, prevent that inside atmospheric pressure from being too big to explode, and the setting of three gas pocket 405 has effectively avoided single sealing plug 406 to paste the unable condition of popping out with gas pocket 405 mutually, and three gas pocket 405 also can be more fast to inside gas discharge and scatter simultaneously, has just so accomplished whole lithium cell that has fire-retardant function.

Claims

1. The utility model provides a lithium cell with fire-retardant function, includes lithium cell casing (1), battery pack (4) and seal assembly (5), a serial communication port, lithium cell casing (1) inside right-hand member is fixed with baffler board (2), and baffler board (2) surface has seted up through-hole (3), is used for fire-retardant battery pack (4) set up in the left side of baffler board (2), and battery pack (4) are including installation cavity (401), lithium cell body (402), fire-retardant area (403) and fin (404), the inside middle-end of installation cavity (401) is provided with lithium cell body (402), and the outside parcel of lithium cell body (402) has fire-retardant area (403), inlay in lithium cell casing (1) outer end has fin (404), is used for the encapsulation seal assembly (5) set up in the right side of baffler board (2), and seal assembly (5) including placing cavity (501), Spout (502), compression jar (503) and pressure valve (504), place both ends about chamber (501) and seted up spout (502), and spout (502) inside sliding connection has compression jar (503), compression jar (503) upper end left side is provided with pressure valve (504).

2. The lithium battery with the flame retardant function according to claim 1, wherein two through holes (3) are symmetrically arranged about the center of the barrier plate (2), and the barrier plate (2) is integrated with the lithium battery shell (1).

3. The lithium battery with the flame retardant function according to claim 1, wherein the outer wall connecting surface of the lithium battery body (402) and the inner wall connecting surface of the flame retardant tape (403) are attached to each other, and the flame retardant tape (403) is of a flexible structure.

4. The lithium battery with the flame retardant function according to claim 1, wherein the size of the outer opening of the compression tank (503) is matched with the size of the inner opening of the sliding groove (502), and two sliding grooves (502) are arranged.

5. The lithium battery with the flame retardant function according to claim 1, wherein the outer opening of the compression tank (503) has a structural size which is matched with the inner opening of the placing cavity (501), and two pressure valves (504) are symmetrically arranged around the center of the compression tank (503).

6. The lithium battery with the flame retardant function according to claim 1, wherein the battery assembly (4) further comprises an air hole (405) and a sealing plug (406), the air hole (405) is formed in the upper surface of the lithium battery shell (1), and the sealing plug (406) is connected to the inside of the air hole (405).

7. The lithium battery with the flame retardant function according to claim 6, wherein the number of the air holes (405) is three at equal intervals with respect to the upper surface of the lithium battery shell (1), and the air holes (405) are connected with the sealing plugs (406) in a clamping manner.