CN209963095U

CN209963095U - Sealing structure of battery metal shell

Info

Publication number: CN209963095U
Application number: CN201921119510.5U
Authority: CN
Inventors: 杜富贵
Original assignee: Chongqing Weiduli New Energy Co Ltd
Current assignee: Chongqing Weiduli New Energy Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-01-17
Anticipated expiration: 2029-07-16

Abstract

The utility model provides a seal structure of battery metal casing, including metal casing and metal inner shell, the metal casing joint is in the metal inner shell bottom outside, metal casing upwards buckles and forms the first kink of the type of falling U, the second kink of the type of bending formation U of metal inner shell downwards, first kink is connected with second kink lock, the space packing of first kink and second kink junction has insulating seal circle, and this battery metal casing's seal structure leakproofness is good, can not cause the situation of weeping, guarantees that the battery uses safe and reliable.

Description

Sealing structure of battery metal shell

Technical Field

The utility model relates to a seal structure of battery metal casing.

Background

The batteries are packaged on the market by metal shells, and have a large share, particularly in the fields of power batteries, button batteries and the like, the connection sealing of the inner metal shell and the outer metal shell or the connection sealing of the metal shell and other materials becomes an important process in the production process of the batteries, and if the batteries are not well treated, the hidden troubles of liquid leakage, joint expansion and the like can occur, so that the safety performance of the batteries is influenced, the quality of the batteries is reduced and the like. In the structure of a button battery on the general market, if the inside of the battery expands up and down, the inner shell and the outer shell move relatively, and the quality safety problem occurs.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a seal structure of battery metal casing, the leakproofness is good, can not cause the situation of weeping, guarantees that the battery uses safe and reliable.

The utility model discloses a realize like this, a seal structure of battery metal casing, including metal casing and metal inner shell, the metal casing joint is in the metal inner shell bottom outside, the metal casing upwards buckles and forms the first kink of the type of falling U, the second kink of the type of bending type formation U in the metal inner shell downwards, first kink is connected with second kink lock, the space packing of first kink and second kink junction has insulating seal circle.

Preferably, the metal shell is a stainless steel shell or an aluminum alloy shell.

Preferably, the metal inner shell is a stainless steel inner shell or an aluminum alloy inner shell.

Preferably, the insulating sealing ring is a polypropylene sealing ring, a polyethylene sealing ring, a polyvinyl chloride sealing ring or a polyester sealing ring.

Preferably, the insulating sealing ring extends upwards out of the top of the metal shell.

Preferably, the insulating sealing ring extends inwards to the inside of the metal inner shell.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that: the metal casing of setting makes progress the bending type and forms the first kink of the type of falling U, the metal inner shell is buckled downwards and is formed the second kink of U type, first kink and second kink lock are connected, first kink and second kink adopt the bending type setting of multi-angle, mutual lock is connected the back, even receive the inside pressure of battery in the junction, still can guarantee that metal casing and metal inner shell junction can not drop, and the space packing of first kink and second kink junction has insulating seal circle, the leakproofness is good, can not cause the situation of weeping, guarantee that the battery uses safe and reliable.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional structural view of a sealing structure of a battery metal case according to the present invention;

fig. 2 is a top view structural diagram of a sealing structure of a battery metal case provided by the present invention;

fig. 3 is a cross-sectional view of a button cell to which a sealing structure of a metal battery case provided in embodiment 1 of the present invention is applied;

fig. 4 is a sectional view of a cylindrical battery with a sealing structure of a battery metal case provided in embodiment 2 of the present invention;

fig. 5 is a partially enlarged view of a portion a in fig. 4.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-2, the present embodiment provides a sealing structure of a metal shell of a battery, including a metal outer shell 1 and a metal inner shell 2, the metal outer shell 1 is connected to the outer side of the bottom of the metal inner shell 2 in a clamping manner, the metal outer shell 1 is bent upward to form a first bent portion 3 in an inverted U shape, and the first bent portion 3 and the metal outer shell 1 are integrally formed by using the same metal material. The metal inner shell 2 is bent downwards to form a U-shaped second bent part 4, and the second bent part 4 and the metal inner shell 2 are integrally formed by the same metal material. First kink 3 is connected with the 4 locks of second kink, and first kink 3 adopts the bending type setting of multi-angle with second kink 4, even receive the inside pressure of battery in the junction, still can guarantee that metal casing 1 and metal inner shell 2 junction can not drop. The gap at the joint of the first bending part 3 and the second bending part 4 is filled with an insulating sealing ring 5, and the insulating sealing ring 5 has the function of keeping the metal outer shell 1 clamped between the metal inner shell 2 to be insulated from each other and also has a sealing effect.

The metal shell 1 is a stainless steel shell or an aluminum alloy shell and is selected according to actual requirements. The metal inner shell 2 is a stainless steel inner shell or an aluminum alloy inner shell and is selected according to actual requirements. The insulating sealing ring 5 is a polypropylene sealing ring or a polyethylene sealing ring or a polyvinyl chloride sealing ring or a polyester sealing ring, and is selected according to actual requirements. Insulating sealing washer 5 upwards extends metal casing 1 top, insulating sealing washer 5 inwards extends to the inside of metal inner shell 2, and such setting up of insulating sealing washer 5 can avoid metal casing 1 and metal inner shell 2 direct contact to reach insulating effect.

Example 1

As shown in fig. 3, the sealing structure of the present application is applied to a sectional view of a button cell. Can effectual promotion metal casing 1 and the structural strength of metal inner shell 2 junction, even inside electrolyte expansion that takes place, still can keep metal casing 1 and metal inner shell 2 junction can not remove, avoid causing the situation of weeping.

Example 2

As shown in fig. 4 to 5, the sealing structure of the present application is applied to a cross-sectional view of a cylindrical battery. Can effectual promotion metal casing 1 and the structural strength of metal inner shell 2 junction, even inside electrolyte expansion that takes place, still can keep metal casing 1 and metal inner shell 2 junction can not remove, avoid causing the situation of weeping.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a seal structure of battery metal casing, includes metal casing (1) and metal inner shell (2), its characterized in that, metal casing (1) joint is in the metal inner shell (2) bottom outside, metal casing (1) upwards buckles and forms first kink (3) of the type of falling U, metal inner shell (2) second kink (4) of the type of bending down and forming the U type, first kink (3) are connected with second kink (4) lock, the space packing of first kink (3) and second kink (4) junction has insulating seal circle (5).

2. The sealing structure of a battery metal case according to claim 1, wherein the metal case (1) is a stainless steel case or an aluminum alloy case.

3. The sealing structure of a battery metal case according to claim 1, wherein the metal inner case (2) is a stainless steel inner case or an aluminum alloy inner case.

4. The sealing structure of the metal shell of the battery according to claim 1, wherein the insulating sealing ring (5) is a polypropylene sealing ring or a polyethylene sealing ring or a polyvinyl chloride sealing ring or a polyester sealing ring.

5. The sealing structure of the metal case of the battery according to claim 1, wherein the insulating seal ring (5) extends upward out of the top of the metal case (1).

6. The sealing structure of a metal case for a battery according to claim 1, wherein the insulating gasket (5) extends inwardly to the inside of the metal inner case (2).