CN201773877U

CN201773877U - Low-resistance cylindrical lithium ion battery cover having novel safe diaphragm

Info

Publication number: CN201773877U
Application number: CN201020518663XU
Authority: CN
Inventors: 衣思平
Original assignee: Tianjin Lishen Battery JSCL
Current assignee: Tianjin Lishen Battery JSCL
Priority date: 2010-09-07
Filing date: 2010-09-07
Publication date: 2011-03-23
Anticipated expiration: 2020-09-07

Abstract

The utility model discloses a low-resistance cylindrical lithium ion battery cover having a novel safe diaphragm, including a sealing ring (1); a safe diaphragm (2) is arranged inside the sealing ring (1); a metal pad (3) is arranged directly over the safe diaphragm (2); a top cover (4) is arranged directly over the metal pad (3); and a plurality of small projections (5) are uniformly distributed on the inner side wall of the safe diaphragm (2). The low-resistance cylindrical lithium ion battery cover disclosed by the utility model has a novel safe diaphragm so as to effectively reduce contact resistance between battery cover members and guarantee the contact resistance not to be changed owing to vibration and falling of the battery, thereby stabilizing the self contact resistance of the battery cover, and guaranteeing the service performance of the battery.

Description

A kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm

Technical field

The utility model relates to battery manufacturing technology field, particularly relates to a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm.

Background technology

At present, advantages such as lithium ion battery has the specific energy height, recycles often, memory time is long, not only on portable electric appts, be used widely as mobile phone, Digital Video and laptop computer, and be widely used in big-and-middle-sized electrical equipment aspects such as electric automobile, electric bicycle and electric tool, therefore the up-to-standard rate to lithium ion battery requires more and more higher.

Advantages such as exactly because lithium ion battery has environmental protection, specific energy is high and in light weight, range of application more and more widely, on notebook computer, almost all use the energy type lithium ion battery, and advance by leaps and bounds especially, the existing trend that comprehensively replaces NI-G and Ni-MH battery in field of power tools.And the low and stable lithium ion battery of internal resistance is vital to the performance of electric tool.

But present lithium-ion battery includes a plurality of assemblies, and the contact resistance between battery cover component is higher and easy to change because vibrate, fall, and can't guarantee the serviceability of battery.

The utility model content

In view of this, the purpose of this utility model provides a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm, the new type of safe diaphragm that it has can reduce the contact resistance between battery cover component effectively and guarantee that contact resistance can not vibrate, fall and change because of battery, make that the contact resistance of battery cover self is stable, guaranteed the serviceability of battery, help improving the market application foreground of battery production producer product, be of great practical significance.

For this reason, the utility model provides a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm, include sealing ring 1, be provided with blowout disk 2 in the described sealing ring 1, be provided with metal gasket 3 directly over the described blowout disk 2, be provided with top cover 4 directly over the described metal gasket 3, be evenly distributed with a plurality of kicks 5 on described blowout disk 2 madial walls.

Wherein, described top cover 4 edges contact with inwall around the described blowout disk 2.

Wherein, described blowout disk 2 is embedded in the described sealing ring 1.

Wherein, described kick 5 is outwards outstanding pit.

The technical scheme that is provided by above the utility model as seen, compared with prior art, the utility model provides a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm, the new type of safe diaphragm that it has can reduce the contact resistance between battery cover component effectively and guarantee that contact resistance can not vibrate, fall and change because of battery, make that the contact resistance of battery cover self is stable, guaranteed the serviceability of battery, help improving the market application foreground of battery production producer product, be of great practical significance.

For the utility model, it can solve the battery cover contact resistance stability and the consistency problem of cylindrical lithium ion battery, and then improves the stability and the consistency of entire cell internal resistance, has also improved the consistency of battery performance.

Description of drawings

A kind of structural representation that Fig. 1 provides for the utility model with low-resistivity cylindrical lithium ion battery cover of new type of safe diaphragm;

The vertical view of metal gasket in a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm that Fig. 2 provides for the utility model;

The schematic perspective view of blowout disk in a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm that Fig. 3 provides for the utility model;

The cutaway view of blowout disk in a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm that Fig. 4 provides for the utility model;

The local enlarged diagram of blowout disk right part in a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm that Fig. 5 provides for the utility model;

Among the figure: 1 is sealing ring, and 2 is blowout disk, and 3 is metal gasket, and 4 is top cover, and 5 are kick.

Embodiment

In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with drawings and embodiments.

A kind of structural representation that Fig. 1 provides for the utility model with low-resistivity cylindrical lithium ion battery cover of new type of safe diaphragm.

Referring to Fig. 1 to Fig. 3, the utility model provides a kind of low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm, include circular sealing ring 1, be provided with blowout disk 2 in the described sealing ring 1, be provided with the metal gasket 3 of annular directly over the described blowout disk 2, be provided with circular top cover 4 directly over the described metal gasket 3, described top cover 4 edges contact with inwall around the described blowout disk 2 simultaneously;

Need to prove that for cylindrical lithium ion battery, used battery cover is to the stable decisive role of column lithium ion battery internal resistance.

On the specific implementation, described blowout disk 2 is embedded in the described sealing ring 1, and described blowout disk 2 outer walls contact with described sealing ring 1 madial wall; Described blowout disk 2 edges contact with the edge of described metal gasket 3.

Referring to Fig. 4, Fig. 5, in the utility model, be evenly distributed with a plurality of kicks 5 on described blowout disk 2 madial walls, described kick 5 is specially tiny, outwards outstanding pit (being aperture or pitting)), after this structure can guarantee that each assembly is assembled in battery cover, closely press together between each assembly, realize enlarging simultaneously contact-making surface between described blowout disk 2 madial walls and described metal gasket 3 bottom surfaces, and the effect that enlarges contact-making surface between described blowout disk 2 madial walls and top cover 4 surrounding edges, make the contact-making surface between battery cover component enlarge, and then the contact resistance that makes battery cover self have reduce greatly; And when battery vibration takes place and falls,, thereby can also guarantee that the contact resistance that has in the battery cover is stable, realize guaranteeing the stable of battery serviceability because the contact-making surface between each assembly enlarges in the battery cover.

Need to prove that for the utility model, described kick 5(is specially pit) size and density do not limit, can set according to user's needs.

In sum, compared with prior art, a kind of low-resistivity cylindrical lithium ion battery cover that the utility model provides with new type of safe diaphragm, the new type of safe diaphragm that it has can reduce the contact resistance between battery cover component effectively and guarantee that contact resistance can not vibrate, fall and change because of battery, make that the contact resistance of battery cover self is stable, guaranteed the serviceability of battery, help improving the market application foreground of battery production producer product, be of great practical significance.

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims

1. low-resistivity cylindrical lithium ion battery cover with new type of safe diaphragm, it is characterized in that, include sealing ring (1), be provided with blowout disk (2) in the described sealing ring (1), be provided with metal gasket (3) directly over the described blowout disk (2), be provided with top cover (4) directly over the described metal gasket (3), be evenly distributed with a plurality of kicks (5) on described blowout disk (2) madial wall.

2. battery cover as claimed in claim 1 is characterized in that, described top cover (4) edge and described blowout disk (2) inwall all around contact.

3. battery cover as claimed in claim 1 is characterized in that, described blowout disk (2) is embedded in the described sealing ring (1).

4. battery cover as claimed in claim 1 is characterized in that, described kick (5) is outwards outstanding pit.