CN211376675U

CN211376675U - Lithium battery cap leak protection sealing washer

Info

Publication number: CN211376675U
Application number: CN202020172426.6U
Authority: CN
Inventors: 张豹; 王少普; 毕艳风; 张吉醌; 秦安朋
Original assignee: Henan Oriental New Energy Co ltd
Current assignee: Henan Oriental New Energy Co ltd
Priority date: 2020-02-16
Filing date: 2020-02-16
Publication date: 2020-08-28
Anticipated expiration: 2030-02-16

Abstract

The utility model provides a lithium cell block leak protection sealing washer, including shell and inner shell, the joint has the sealing washer on the inner wall at inner shell top, and has seted up the ripple on the lateral wall of sealing washer, and the inner shell is close to the ripple groove of seting up with ripple looks adaptation on the corrugated inner wall, and all is provided with the lug on the outer wall of sealing washer top and bottom, and the inner shell is close to all to set up flutedly on the inner wall of the top of lug and bottom, and the lug joint is in the inside of recess. The utility model discloses, ripple and ripple groove can make sealing washer and battery inner shell laminate more, and when the battery inner shell received the collision shape, the ripple was in the inside of ripple groove always, can guarantee sealed effect, realized furthest and blockking that electrolyte oozes, and in gas reachd the space between shell and the inner shell through first through-hole and second through-hole, then outside a plurality of gas guide holes of following the setting of shell top discharged the battery, and the PTFE layer can keep apart the weeping and prevent at the inside of shell and leak.

Description

Lithium battery cap leak protection sealing washer

Technical Field

The utility model relates to a lithium cell technical field, concretely relates to lithium cell block leak protection sealing washer.

Background

The lithium battery is a novel green energy storage component, has the advantages of being green, environment-friendly, high in energy density, long in service life and the like, and is widely applied to emerging fields of electronic technology, electric automobile energy storage, automobile starting, military industry, aerospace and the like.

The current lithium battery sealing washer, the leakproofness is not strong, leads to the battery weeping, causes the loss to do not have explosion-proof function, and can not roll up the core to the battery and cushion, when the battery received the collision, roll up the core and damage very easily, can not satisfy the operation requirement, consequently, need to design lithium battery block leak protection sealing washer promptly and solve above-mentioned problem.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a lithium cell block leak protection sealing washer.

In order to achieve the above object, the present invention provides the following technical solutions: lithium cell block leak protection sealing washer, including shell and inner shell, the joint has the sealing washer on the inner wall at inner shell top, and has seted up the ripple on the lateral wall of sealing washer, the inner shell is close to set up the ripple groove with ripple looks adaptation on the corrugated inner wall, and all is provided with the lug on the outer wall of sealing washer top and bottom, the inner shell is close to all to set up flutedly on the inner wall of the top of lug and bottom, and the lug joint is in the inside of recess.

Further, positive lugs, a connecting cover plate, an explosion-proof sheet, a gasket and a cap are welded on the inner wall of the sealing ring respectively, the connecting cover plate is located right above the positive lugs, the explosion-proof sheet is located right above the connecting cover plate, the gasket is located right above the explosion-proof sheet, the cap is located right above the gasket, and the cap is extended to the outer wall of the top of the shell.

Further, set up the air guide hole that is equidistance structure and distributes on the outer wall at shell top, and the inside of air guide hole all is provided with the PTFE layer with the both sides of inner shell top outer wall, set up the first through-hole that is equidistance structure and distributes on the outer wall at inner shell top, and connect the inside of apron, explosion-proof piece, gasket and set up the second through-hole that is linked together with the PTFE layer.

Further, the welding has the empty section of thick bamboo that is equidistant structure and distributes on the inner wall of shell, and the inside sliding connection of an empty section of thick bamboo has the movable block, the welding has the expansion plate on the outer wall of movable block one side, and the welding has damping spring on the outer wall that the expansion plate opposite side was kept away from to the movable block, be provided with the rubber pad on the opposite side outer wall that the movable block was kept away from to the expansion plate, and laminate mutually between rubber pad and the inner shell.

Furthermore, the welding has the expanding spring that is equidistant structure and distributes on the inner wall of shell bottom, and the welding of expanding spring's top has the backup pad, the backup pad welding is on the outer wall of inner shell bottom.

Further, the axle center department welding of inner shell bottom outer wall has the negative pole ear, and the negative pole ear extends to the center department of outer shell bottom outer wall, the inside of inner shell is provided with rolls up the core.

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

1. through the ripple that sets up, ripple and ripple groove can make sealing washer and battery inner shell laminate more, and when the battery inner shell received the collision shape, the ripple was in the inside in ripple groove always, can guarantee sealed effect, can prevent that the sealing washer from breaking away from the inner shell, realizes furthest and blocks that electrolyte oozes.

2. Through the first through-hole, the second through-hole and the PTFE layer that set up, when the battery is inside because of chemical reaction produces gas, gas reaches in the space between shell and the inner shell through first through-hole and second through-hole, then discharges to the battery outside from a plurality of air guide holes that the shell top set up, and the PTFE layer can keep apart the weeping and prevent at the inside of shell and leak.

3. Through damping spring and the expanding spring who sets up, when the battery received the collision, expanding spring and expanding spring can have certain cushioning effect to the book core of battery inner shell, have avoided rolling up the core and have received the striking back, cause the damage, the effectual life who prolongs the battery.

Drawings

Fig. 1 is the utility model provides a spatial structure sketch map of lithium cell block leak protection sealing washer.

Fig. 2 is the internal structure schematic diagram of the lithium battery cap leak protection sealing ring provided by the utility model.

Fig. 3 is a schematic view of a buffering structure of the lithium battery cap leak-proof sealing ring.

Fig. 4 is the utility model provides a sealing washer structural schematic of lithium cell block leak protection sealing washer.

Description of the main element symbols: 1-a housing; 2-inner shell; 3-sealing ring; 4-corrugation; 5-a corrugated groove; 6-a bump; 7-a groove; 8-connecting the cover plate; 9-explosion-proof piece; 10-a gasket; 11-a PTFE layer; 12-a first via; 13-empty cartridge; 14-a movable block; 15-a damping spring; 16-a retractable plate; 17-a rubber pad; 18-a support plate; 19-a telescoping spring; 20-capping; 21-negative tab; 22-positive tab; 23-a winding core; 24-a second via; 25-air guide hole.

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 to 4 simultaneously, lithium battery cap leak protection sealing washer, including shell 1 and inner shell 2, joint has sealing washer 3 on the inner wall at inner shell 2 top, and seted up ripple 4 on the lateral wall of sealing washer 3, set up the ripple groove 5 with ripple 4 looks adaptation on the inner wall that inner shell 2 is close to ripple 4, and all be provided with lug 6 on the outer wall of sealing washer 3 top and bottom, all set up fluted 7 on the inner wall of the top that inner shell 2 is close to lug 6 and bottom, and lug 6 joint is in the inside of recess 7, ripple 4 and ripple groove 5 can make sealing washer 3 and battery inner shell 2 laminate more, when the battery receives the collision shape, ripple 4 is in the inside of ripple groove 5 always, can guarantee sealed effect, can prevent that sealing washer 3 from breaking away from inner shell 2, realize furthest and block that electrolyte from oozing.

Further, weld positive ear 22 on the 3 inner walls of sealing washer respectively, connect apron 8, explosion-proof piece 9, gasket 10 and block 20, connect apron 8 to be located positive ear 22 directly over, and explosion-proof piece 9 is located and connects apron 8 directly over, gasket 10 is located explosion-proof piece 9 directly over, block 20 is located gasket 10 directly over, and block 20 prolongs to the outer wall at 1 top of shell, the multilayer protection, can make the leakproofness of battery stronger.

Furthermore, the outer wall of the top of the shell 1 is provided with air guide holes 25 which are distributed in an equidistant structure, the inner part of the air guide hole 25 and the two sides of the outer wall of the top of the inner shell 2 are both provided with PTFE layers 11, the outer wall of the top of the inner shell 2 is provided with first through holes 12 which are distributed in an equidistant structure, and the connecting cover plate 8, the explosion-proof sheet 9 and the gasket 10 are internally provided with a second through hole 24 communicated with the PTFE layer 11, when gas is generated by a chemical reaction inside the battery, the gas reaches the space between the outer case 1 and the inner case 2 through the second through-holes 24 and the first through-holes 12, then discharged to the outside of the battery through a plurality of air vents 25 formed at the top of the case 1, and when the leakage of the battery occurs, the liquid in the battery flows to the second through hole 24, meanwhile, the PTFE layer 11 in the air guide hole 25 has the function of ventilating and blocking liquid, and can prevent the liquid between the outer shell 1 and the inner shell 2 from flowing out of the outer shell 1.

Further, the welding has an empty section of thick bamboo 13 that is equidistant structure and distributes on the inner wall of shell 1, and the inside sliding connection of an empty section of thick bamboo 13 has movable block 14, the welding has expansion plate 16 on the outer wall of movable block 14 one side, and the welding has damping spring 15 on the outer wall of expansion plate 16 opposite side is kept away from to movable block 14, be provided with rubber pad 17 on the opposite side outer wall that movable block 14 was kept away from to expansion plate 16, and laminate mutually between rubber pad 17 and the inner shell 2, when the battery received the collision, damping spring 15 can have certain cushioning effect to the book core 23 of battery inner shell 2.

Further, the welding has the expanding spring 19 that is equidistant structure distribution on the inner wall of shell 1 bottom, and the welding of expanding spring 19's top has backup pad 18, and backup pad 18 welds on the outer wall of inner shell 2 bottom, and damping spring 15 and expanding spring 19 can have certain cushioning effect to the book core 23 of battery inner shell 2, have avoided rolling up core 23 and have received the striking back, cause the damage, the effectual life who prolongs the battery.

Further, the axle center department welding of inner shell 2 bottom outer wall has negative pole ear 21, and negative pole ear 21 extends to the center department of 1 bottom outer wall of shell, and the inside of inner shell 2 is provided with rolls up core 23, and is rational in infrastructure, the modern design.

The working principle is as follows: when the lithium battery cap leak-proof sealing ring is used, the corrugation 4 and the corrugation groove 5 can enable the sealing ring 3 to be more attached to the battery inner shell 2, when the battery is collided, the corrugation 4 is always positioned inside the corrugation groove 5, the sealing effect can be ensured, the sealing ring 3 can be prevented from being separated from the inner shell 2, the electrolyte seepage can be prevented to the maximum extent, when the inside of the battery generates gas due to chemical reaction, the gas reaches the space between the outer shell 1 and the inner shell 2 through the second through hole 24 and the first through hole 12, then the gas is discharged to the outside of the battery from the plurality of gas guide holes 25 arranged at the top of the outer shell 1, when the battery leaks, the liquid in the battery can flow to the second through hole 24, at the moment, the PTFE layer 11 has the function of ventilating the liquid and blocking, the leaked liquid is isolated to prevent the external leakage cap, when the inner shell 1 is broken or the joint between the, the inside liquid of battery will flow in the space between shell 1 and the inner shell 2, prevent that the liquid in the battery from flowing to the shell 1 outside, the PTFE layer 11 in the air guide hole 25 can prevent that the liquid between shell 1 and the inner shell 2 from flowing to the shell 1 outside simultaneously, when the battery receives the collision, damping spring 15 and expanding spring 19 can have certain cushioning effect to the book core 23 of battery inner shell 2, avoided rolling up core 23 and received the striking after, cause the damage, the effectual life who prolongs the battery.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. Lithium cell block leak protection sealing washer, including shell (1) and inner shell (2), its characterized in that, the joint has sealing washer (3) on the inner wall at inner shell (2) top, and sets up on the lateral wall of sealing washer (3) ripple (4), set up ripple groove (5) with ripple (4) looks adaptation on inner shell (2) are close to the inner wall of ripple (4), and all be provided with lug (6) on the outer wall of sealing washer (3) top and bottom, all set up fluted (7) on inner shell (2) are close to the inner wall of the top and the bottom of lug (6), and lug (6) joint is in the inside of recess (7).

2. The lithium battery cap leak-proof sealing ring according to claim 1, characterized in that the inner wall of the sealing ring (3) is welded with a positive tab (22), a connecting cover plate (8), an explosion-proof sheet (9), a gasket (10) and a cap (20), the connecting cover plate (8) is located right above the positive tab (22), the explosion-proof sheet (9) is located right above the connecting cover plate (8), the gasket (10) is located right above the explosion-proof sheet (9), the cap (20) is located right above the gasket (10), and the cap (20) is extended to the outer wall of the top of the shell (1).

3. The lithium battery cap leak-proof sealing ring according to claim 1, wherein the outer wall of the top of the outer shell (1) is provided with air vents (25) distributed in an equidistant structure, the inner portions of the air vents (25) and the two sides of the outer wall of the top of the inner shell (2) are both provided with PTFE layers (11), the outer wall of the top of the inner shell (2) is provided with first through holes (12) distributed in an equidistant structure, and the inner portions of the connecting cover plate (8), the explosion-proof sheet (9) and the gasket (10) are provided with second through holes (24) communicated with the PTFE layers (11).

4. The lithium battery cap leak-proof sealing ring according to claim 1, characterized in that the inner wall of the outer shell (1) is welded with hollow cylinders (13) distributed in an equidistant structure, the inner part of each hollow cylinder (13) is connected with a movable block (14) in a sliding manner, the outer wall of one side of each movable block (14) is welded with a telescopic plate (16), the outer wall of the other side of each movable block (14) away from the telescopic plate (16) is welded with a damping spring (15), the outer wall of the other side of each telescopic plate (16) away from the movable block (14) is provided with a rubber pad (17), and the rubber pads (17) and the inner shell (2) are mutually attached.

5. The lithium battery cap leakproof sealing ring according to claim 1, wherein the inner wall of the bottom of the outer shell (1) is welded with the expansion springs (19) distributed in an equidistant structure, the top end of each expansion spring (19) is welded with the supporting plate (18), and the supporting plate (18) is welded on the outer wall of the bottom of the inner shell (2).

6. The lithium battery cap leakproof sealing ring according to claim 1, wherein the negative electrode tab (21) is welded to the axis of the outer wall of the bottom of the inner shell (2), the negative electrode tab (21) extends to the center of the outer wall of the bottom of the outer shell (1), and a winding core (23) is arranged inside the inner shell (2).