CN211376677U

CN211376677U - Explosion-proof shell of lithium battery

Info

Publication number: CN211376677U
Application number: CN202020340016.8U
Authority: CN
Inventors: 刘春光; 彭争; 廖忱怡; 杨娟
Original assignee: Hunan Weidian Technology Co ltd
Current assignee: Hunan Weidian Technology Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-08-28
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses an explosion-proof shell of a lithium battery, which comprises a shell body, a plate electrode, a pressure relief assembly and a self-power-off assembly, wherein the shell body is arranged in a hollow cavity structure; the self-power-off assembly comprises a charging slot, a charging column, a sealing ring, a piston, a support rod and a sleeve, the charging slot is arranged on the shell body and is close to the end of the shell body, the charging column is arranged in the charging slot, the piston is sleeved on the outer side of the charging column, the sleeve is arranged on the upper end face of the piston, the support rod is uniformly arranged on the bottom wall of the charging slot, and the sealing ring is arranged on the inner wall of the charging slot and is arranged above the support rod. The utility model belongs to the technical field of the lithium cell, specifically indicate a lithium cell explosion-proof shell that in time cuts off charging, but quick safety pressure release.

Description

Explosion-proof shell of lithium battery

Technical Field

The utility model belongs to the technical field of the lithium cell, specifically indicate an explosion-proof shell of lithium cell.

Background

Lithium batteries are widely used in products or fields of electric vehicles, energy storage devices and the like because of their advantages of high energy density, environmental friendliness and the like. However, the safety of the lithium battery is an important factor affecting the development of the lithium battery, and when the lithium battery is overcharged, the lithium battery (lithium battery module) generates gas, fires, and even explodes. At present, a pressure release valve is added on a top cover of a lithium battery, internal high pressure is discharged at one time, and the shell is damaged, even casualties can be caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a timely cut off and charge, but lithium cell explosion-proof shell of quick safe pressure release.

In order to realize the above functions, the utility model discloses the technical scheme who takes as follows: an explosion-proof shell of a lithium battery comprises a shell body, a plate electrode, a pressure relief assembly and a self-power-off assembly, wherein the shell body is arranged in a hollow cavity structure; the auto-power-off assembly comprises a charging slot, a charging column, a sealing ring, a piston, a support rod and a sleeve, wherein the charging slot is arranged on the shell body and is close to the end part of the shell body, the charging column is arranged in the charging slot and is used for charging the lithium battery assembly through an external charging wire, the piston is sleeved outside the charging column, the sleeve is arranged on the upper end surface of the piston, the support rod is uniformly arranged on the bottom wall of the charging slot, the inner wall of the charging slot is arranged on the sealing ring, the support rod is arranged above the support rod, the temperature inside the shell body rises when the lithium battery is overcharged, the air below the piston is thermally expanded, the piston moves upwards, the sleeve arranged on the piston pushes out the charging plug from the charging column, the charging connection is automatically disconnected, and the lithium battery assembly is.

Further, the pressure release subassembly includes through-hole, gas bag, sealed glue, pressure release groove and pressure release groove shrouding, the through-hole is located on the plate electrode and is leaned on the setting of plate electrode middle part, the gas bag is located the plate electrode upper wall and is cup jointed in the through-hole outside, sealed glue is located the plate electrode upper wall and is located the through-hole periphery for it is fixed to the gas bag, pressure release groove locates the shell body upper wall and locates the through-hole top, the encapsulation of pressure release groove shrouding thermoplasticity and pressure release groove periphery are sealed, carry out the shutoff to pressure release groove, when the inside high temperature of shell body, gaseous inflation makes the gas bag swell, and broken pressure release groove shrouding rises along with the gas bag crescent, when pressure surpasss the value, sealed glue is difficult to continue to fix the gas bag, and the gas bag is ejecting from pressure release groove by inside atmospheric pressure, can release pressure fast, and the gas bag departure.

Furthermore, the shell body is provided with a positive pole column and a negative pole column, the positive pole column and the negative pole column are arranged on the upper wall of the shell body and are respectively arranged on two sides of the pressure relief groove and used for being connected with external electrical elements.

Further, the air bag is made of flexible materials, such as rubber, polytetrafluoroethylene and the like.

Furthermore, the pressure relief groove sealing plate is made of plastic materials.

The utility model adopts the above structure to gain beneficial effect as follows: the utility model provides a pair of explosion-proof shell of lithium cell, moreover, the steam generator is simple in structure, and reasonable in design utilizes to cross to fill and releases heat and causes gas expansion, and drive piston upward movement is ejecting from the post that charges with charging plug, and disconnection charging by oneself connects, prevents that lithium battery pack from further worsening, and when battery internal pressure lasts the increase, the inflation of gas bag broke out the pressure relief groove shrouding, when gas bag internal pressure continues to increase to certain pressure, the gas bag is followed the pressure relief groove and is washed out, but quick safe pressure relief, can not cause the personnel to cause.

Drawings

Fig. 1 is an overall structure diagram of an explosion-proof housing of a lithium battery according to the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a partially enlarged view of a portion B in fig. 1.

The self-powered-off charging device comprises a shell body 1, a shell body 2, an electrode plate 3, a pressure relief assembly 4, a self-powered-off assembly 5, a charging slot 6, a charging column 7, a sealing ring 8, a piston 9, a supporting rod 10, a sleeve pipe 11, a through hole 12, an air bag 13, a sealant 14, a pressure relief groove 15, a pressure relief groove sealing plate 16, a positive pole column 17 and a negative pole column.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the following embodiments, and the technical features or the connection relations of the present invention, which are not described in detail, are the prior art adopted.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-3, the utility model relates to an explosion-proof housing for lithium battery, which comprises a housing body 1, a plate electrode 2, a pressure relief assembly 3 and a self-power-off assembly 4, wherein the housing body 1 is arranged in a hollow cavity structure, the plate electrode 2 is arranged in the housing body 1, the pressure relief assembly 3 is arranged in the housing body 1 and is arranged near the upper part of the housing body 1, and the self-power-off assembly 4 is arranged on the housing body 1 and is arranged near the upper part of the housing body 1; the automatic power-off assembly 4 comprises a charging slot 5, a charging column 6, a sealing ring 7, a piston 8, a support rod 9 and a sleeve 10, the charging slot 5 is arranged on the shell body 1 and is close to the end of the shell body 1, the charging column 6 is arranged in the charging slot 5, the piston 8 is sleeved on the outer side of the charging column 6, the sleeve 10 is arranged on the upper end face of the piston 8, the support rod 9 is uniformly arranged on the bottom wall of the charging slot 5, and the sealing ring 7 is arranged on the inner wall of the charging slot 5 and is arranged above the support rod 9.

Specifically, pressure release subassembly 3 includes through-hole 11, gas bag 12, sealed glue 13, pressure release groove 14 and pressure release groove shrouding 15, through-hole 11 is located on plate electrode 2 and is leaned on the setting of plate electrode 2 middle part, gas bag 12 is located the 2 upper walls of plate electrode and is cup jointed in the 11 outsides of through-hole, sealed glue 13 is located the 2 upper walls of plate electrode and is located through-hole 11 peripherally, pressure release groove 14 is located 1 upper walls of shell body and is located through-hole 11 top, pressure release groove shrouding 15 thermoplasticity encapsulation and pressure release groove 14 peripherally.

Specifically, the housing body 1 is provided with a positive pole post 16 and a negative pole post 17, and the positive pole post 16 and the negative pole post 17 are arranged on the upper wall of the housing body 1 and are respectively arranged on two sides of the pressure relief groove 14.

Specifically, the air bag 12 is made of a flexible material, and the pressure relief groove sealing plate 15 is made of a plastic material.

When the lithium battery is used, the lithium battery component is packaged in the shell body 1 and is electrically connected with the electrode plate, the positive electrode column, the negative electrode column and the charging column 6, when the lithium battery is overcharged, the temperature in the shell body 1 rises, air below the piston 8 expands when heated, the piston 8 is driven to move upwards, the sleeve 10 arranged on the piston 8 pushes out the charging plug from the charging column 6, and the charging connection is automatically disconnected; when the inside high temperature of housing body 1, and still continue to rise after the disconnection charging connection, the gas inflation in the housing body 1 this moment, get into in the gas bag 12 through-hole 11, make the gas bag 12 swell, the broken pressure release groove shrouding 15 that rises, along with gas bag 12 crescent, when pressure surpassed a definite value, sealed glue 13 is difficult to maintain the fixed to gas bag 12, gas bag 12 is ejecting from pressure release groove 14 by the inside atmospheric pressure of housing body 1, can release pressure fast, the gas bag 12 departure of flexible material can not cause the injury to the people simultaneously.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. An explosion-proof shell of lithium cell which characterized in that: the pressure relief assembly is arranged in the shell body and close to the upper part of the shell body; the self-power-off assembly comprises a charging slot, a charging column, a sealing ring, a piston, a support rod and a sleeve, the charging slot is arranged on the shell body and is close to the end of the shell body, the charging column is arranged in the charging slot, the piston is sleeved on the outer side of the charging column, the sleeve is arranged on the upper end face of the piston, the support rod is uniformly arranged on the bottom wall of the charging slot, and the sealing ring is arranged on the inner wall of the charging slot and is arranged above the support rod.

2. The explosion-proof enclosure of a lithium battery as recited in claim 1, wherein: the pressure release subassembly includes through-hole, gas package, sealed glue, pressure release groove and pressure release groove shrouding, the through-hole is located on the plate electrode and is leaned on the plate electrode middle part setting, the gas package is located the plate electrode upper wall and is cup jointed in the through-hole outside, sealed glue is located the plate electrode upper wall and is located the through-hole periphery, pressure release groove locates the shell body upper wall and locates the through-hole top, the encapsulation is moulded with heat to pressure release groove shrouding and is discharged the pressure groove periphery.

3. The explosion-proof housing of a lithium battery as recited in claim 2, wherein: the shell body is provided with a positive pole column and a negative pole column, wherein the positive pole column and the negative pole column are arranged on the upper wall of the shell body and are respectively arranged on two sides of the pressure relief groove.

4. The explosion-proof housing of a lithium battery as recited in claim 2, wherein: the air bag is made of flexible materials.

5. The explosion-proof housing of a lithium battery as recited in claim 2, wherein: the pressure relief groove sealing plate is made of plastic materials.