CN210403874U

CN210403874U - Lithium ion battery structure

Info

Publication number: CN210403874U
Application number: CN201921236149.4U
Authority: CN
Inventors: 邓桂超; 黄培栩
Original assignee: Dongguan Elite New Energy Co Ltd
Current assignee: Dongguan Elite New Energy Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-24
Anticipated expiration: 2029-08-01

Abstract

The utility model provides a lithium ion battery structure, which comprises a shell, a first cover plate and a second cover plate; the shell is provided with an accommodating space, the first cover plate and the second cover plate are respectively arranged at two ends of the shell, and the first cover plate and the second cover plate seal the accommodating space; a pressure release valve is arranged on the first cover plate; and the surface of the second cover plate, which is far away from the accommodating space, is sunken to form an explosion-proof mark. The utility model provides a lithium ion battery structure is provided with the sunken explosion-proof trace that forms of relief valve and second apron on first apron, when lithium ion battery internal pressure was too big, the accessible the relief valve carries out the pressure, if the relief valve breaks down and when leading to the pressure function inefficacy, the explosion-proof trace department of second apron receives the inside pressure extrusion of accommodating space can split for gas in the accommodating space passes through explosion-proof trace discharges to carry out the pressure release, explosion-proof respond well, improved lithium ion battery's security performance.

Description

Lithium ion battery structure

[ technical field ] A method for producing a semiconductor device

The utility model relates to a battery technology field especially relates to a lithium ion battery structure.

[ background of the invention ]

With the development of new energy industry, the application of lithium ion batteries as energy storage devices is more and more extensive, and the power of lithium ion batteries is more and more increased. The high-power lithium ion battery can cause certain gas to be generated inside the lithium ion battery under the influence of adverse factors such as high temperature, short circuit, overcharge and the like, so that the pressure inside the lithium ion battery is increased, and further, a shell of the lithium ion battery is deformed or even explodes, and great potential safety hazards exist. The existing lithium ion battery has the defects of single explosion-proof function, poor explosion-proof effect, easy occurrence of fire and poor safety performance.

In view of the above, it is desirable to provide a novel lithium ion battery structure to overcome the above drawbacks.

[ Utility model ] content

The utility model aims at providing a lithium ion battery structure is provided with the sunken explosion-proof trace that forms of relief valve and second apron on first apron, and explosion-proof respond well has improved lithium ion battery's security performance.

In order to achieve the above object, the present invention provides a lithium ion battery structure, which includes a housing, a first cover plate and a second cover plate; the shell is provided with an accommodating space, the first cover plate and the second cover plate are respectively arranged at two ends of the shell, and the first cover plate and the second cover plate seal the accommodating space; a pressure release valve is arranged on the first cover plate; and the surface of the second cover plate, which is far away from the accommodating space, is sunken to form an explosion-proof mark.

In a preferred embodiment, two ends of the housing are further provided with a first sealing ring and a second sealing ring respectively, an edge of the first cover plate abuts against the first sealing ring, and an edge of the second cover plate abuts against the second sealing ring.

In a preferred embodiment, the housing is cylindrical; the edge of the first sealing ring extends to the direction close to the central shaft of the cylindrical shell to form a first clamping part, and the first cover plate is clamped on the first clamping part; the edge of the second sealing ring extends towards the direction close to the central shaft of the cylindrical shell to form a second clamping part, and the second cover plate is clamped on the second clamping part.

In a preferred embodiment, a positive electrode welding table is convexly arranged on the surface of the first cover plate close to the accommodating space, and a negative electrode welding table is convexly arranged on the surface of the second cover plate close to the accommodating space.

In a preferred embodiment, the battery further comprises a winding core, the winding core is accommodated in the accommodating space, one end of the winding core is provided with a positive electrode tab, and the other end of the winding core is provided with a negative electrode tab; the positive pole lug is welded on the positive pole welding table, and the negative pole lug is welded on the negative pole welding table.

In a preferred embodiment, the positive electrode stage and the negative electrode stage are cylindrical.

Compared with the prior art, the utility model provides a lithium ion battery structure is provided with the sunken explosion-proof trace that forms of relief valve and second apron on first apron, when lithium ion battery internal pressure was too big, the accessible the relief valve row presses, if the relief valve breaks down and when leading to row to press the function inefficacy, the explosion-proof trace department of second apron can split by the inside pressure extrusion of accommodating space for gas in the accommodating space passes through explosion-proof trace discharges to carry out the pressure release, explosion-proof respond well, improved lithium ion battery's security performance.

[ description of the drawings ]

Fig. 1 is a schematic diagram of a lithium ion battery structure provided by the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is an enlarged view at B in fig. 1.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

Referring to fig. 1, fig. 1 is a schematic diagram of a lithium ion battery structure 100 according to the present invention; the utility model provides a lithium ion battery structure 100, including casing 10, first apron 20 and second apron 30.

The housing 10 has an accommodating space 101, the first cover plate 20 and the second cover plate 30 are respectively disposed at two ends of the housing 10, and the accommodating space 101 is sealed by the first cover plate 20 and the second cover plate 30; a pressure release valve 21 is arranged on the first cover plate 20; the surface of the second cover plate 30 far away from the accommodating space 101 is recessed to form an explosion-proof mark 301.

The utility model provides a lithium ion battery structure 100 is provided with the sunken explosion-proof trace 301 that forms of relief valve 21 and second apron 30 on first apron 20, when lithium ion battery internal pressure was too big, the accessible relief valve 21 arranges the pressure, if relief valve 21 breaks down and when leading to arranging the pressure function inefficacy, the explosion-proof trace 301 department of second apron 30 can split by the inside pressure extrusion of accommodating space 101 for gas in the accommodating space 101 passes through explosion-proof trace 301 discharges to carry out the pressure release, it is explosion-proof respond well, improved lithium ion battery's security performance.

Referring to fig. 2 and 3, a first sealing ring 41 and a second sealing ring 42 are further disposed at two ends of the housing 10, respectively, an edge of the first cover plate 20 abuts against the first sealing ring 41, and an edge of the second cover plate 30 abuts against the second sealing ring 42, that is, the first sealing ring 41 and the second sealing ring 42 are respectively located between the first cover plate 20 and the housing 10 and between the second cover plate 30 and the housing 10, and the first sealing ring 41 and the second sealing ring 42 enhance the sealing performance of the accommodating space 101.

Specifically, the housing 10 is cylindrical, and the first cover plate 20 and the second cover plate 30 are both circular; the edge of the first sealing ring 41 extends to a direction close to the central axis of the cylindrical housing 10 to form a first retaining part 411, and the first cover plate 20 is retained on the first retaining part 411; the edge of the second sealing ring 42 extends to a direction close to the central axis of the cylindrical housing 10 to form a second retaining portion 421, and the second cover plate 30 is retained on the second retaining portion 421. The first and

second retainers

411 and 421 prevent the first and

second covers

20 and 30 from falling off, thereby further enhancing the sealing performance of the accommodating space 101. In the present embodiment, the first seal ring 41 and the second seal ring 42 are rubber rings having a certain elasticity.

Further, a positive electrode welding table 22 is convexly disposed on a surface of the first cover plate 20 close to the receiving space 101, and a negative electrode welding table 31 is convexly disposed on a surface of the second cover plate 30 close to the receiving space 101. Specifically, the lithium ion battery structure 100 provided by the present invention further includes a winding core 50, the winding core 50 is accommodated in the accommodating space 101, one end of the winding core 50 is provided with an anode tab 51, and the other end of the winding core 50 is provided with a cathode tab 52; the positive electrode tab 51 is welded on the positive electrode welding table 22, and the negative electrode tab 52 is welded on the negative electrode welding table 31. In this embodiment, the positive electrode stage 22 and the negative electrode stage 31 are cylindrical; the positive electrode welding table 22 and the negative electrode welding table 31 increase the welding area of the positive electrode tab 51 and the negative electrode tab 52, enhance the welding strength of the tabs, and increase the overcurrent capacity of the positive electrode tab 51 and the negative electrode tab 52.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. A lithium ion battery structure characterized by: comprises a shell, a first cover plate and a second cover plate; the shell is provided with an accommodating space, the first cover plate and the second cover plate are respectively arranged at two ends of the shell, and the first cover plate and the second cover plate seal the accommodating space; a pressure release valve is arranged on the first cover plate; and the surface of the second cover plate, which is far away from the accommodating space, is sunken to form an explosion-proof mark.

2. The lithium ion battery structure of claim 1, wherein: the two ends of the shell are respectively provided with a first sealing ring and a second sealing ring, the edge of the first cover plate is abutted against the first sealing ring, and the edge of the second cover plate is abutted against the second sealing ring.

3. The lithium ion battery structure of claim 2, wherein: the shell is cylindrical; the edge of the first sealing ring extends to the direction close to the central shaft of the cylindrical shell to form a first clamping part, and the first cover plate is clamped on the first clamping part; the edge of the second sealing ring extends towards the direction close to the central shaft of the cylindrical shell to form a second clamping part, and the second cover plate is clamped on the second clamping part.

4. The lithium ion battery structure of claim 3, wherein: the surface of the first cover plate, which is close to the accommodating space, is convexly provided with a positive electrode welding table, and the surface of the second cover plate, which is close to the accommodating space, is convexly provided with a negative electrode welding table.

5. The lithium ion battery structure of claim 4, wherein: the winding core is accommodated in the accommodating space, one end of the winding core is provided with a positive electrode lug, and the other end of the winding core is provided with a negative electrode lug; the positive pole lug is welded on the positive pole welding table, and the negative pole lug is welded on the negative pole welding table.

6. The lithium ion battery structure of claim 5, wherein: the positive electrode welding table and the negative electrode welding table are cylindrical.