CN202513224U

CN202513224U - Lithium ion battery

Info

Publication number: CN202513224U
Application number: CN2012201037851U
Authority: CN
Inventors: 王文成
Original assignee: SHENZHEN ZHONGTAO BATTERY CO Ltd
Current assignee: SHENZHEN ZHONGTAO BATTERY CO Ltd
Priority date: 2012-03-19
Filing date: 2012-03-19
Publication date: 2012-10-31
Anticipated expiration: 2022-03-19

Abstract

The utility model provides a lithium ion battery, which comprises a battery shell, a battery cell and electrolyte, wherein the electrolyte is mainly filled in the battery shell to play roles in electric conduction and chemical reaction, the battery cell is arranged in the battery shell and is formed by connecting a plurality of roll cores, each roll core is formed by jointly rolling a positive plate, a negative plate and a diaphragm which are equilong, an aluminum strip is welded at one end of each positive plate, and a nickel strip is welded at one end of each negative plate. The battery further comprises a positive tab and a negative tab, wherein the positive tab is arranged outside the aluminum strips to serve as a positive electrode of the battery, the negative tab is arranged outside the nickel strips to serve as a negative electrode of the battery, and the aluminum strips and the nickel strips are uniformly welded on the positive tab and the negative tab. Compared with the prior art, the lithium ion battery is relative simple and easy to operate, the independent structure of the positive tab and the negative tab are relatively convenient to use for external connection, and the lithium ion battery is attractive in overall appearance.

Description

Lithium ion battery

Technical field

The utility model relates to polymer battery, relates in particular to a kind of improvement of lithium ion battery.

Background technology

The positive and negative electrode leaf length of existing lithium ion battery remains on below the 1.5m basically; But for positive and negative plate greater than 1.5m; Its itemize arc, divide tiltedly, reel, the itemize operation easier is too big, present stage can't overcome basically; And adopt the structure of multireel core, can original overlength pole piece be decomposed into 2 sections, 3 sections or multistage more.Form 2,3 or more a plurality of rouleau core then through reeling; But also there is its deficiency in the multireel cored structure; Be that a plurality of volume cores need (before the encapsulation) need be weldingly fixed on aluminium strip, the nickel strap of each rouleau core on the lug before going into shell; Between each aluminium strip, between each nickel strap because position is special, and there is certain degree of difficulty in operation; Simultaneously, aluminium strip, formed battery positive and negative electrode of nickel strap and the extraneous also inconvenience that is connected, its bulk shape is not attractive in appearance yet.

The utility model content

The purpose of the utility model is to overcome the defective of prior art, provide a kind of can be simple and easy with lug be fixedly mounted on the aluminium strip, nickel strap of volume core, lithium ion battery simple to operate, easy to connect, aesthetic in appearance.

The utility model is to realize like this; Lithium ion battery; Comprise a battery container, a battery and electrolyte, said battery is arranged in the said battery container, and said battery is connected and composed by most volume cores; Each said volume core is reeled jointly by isometric positive plate, negative plate and barrier film respectively and is formed; In the end welding aluminium strip of each said positive plate, in the end welding nickel strap of each said negative plate, said battery comprises that also being placed on said aluminium strip is used as a positive pole ear of anode and is placed on the negative lug of said nickel strap as GND.

The utility model lithium ion battery adopts the positive pole ear be placed on said aluminium strip, the said nickel strap, negative lug to form the positive and negative electrode of battery; Unification is weldingly fixed on said aluminium strip, said nickel strap on said positive pole ear, the negative lug; Compared with prior art; Its operation is simpler and easy, and independent said positive pole ear, negative lug are connected also more convenient in use with the external world, and bulk shape is attractive in appearance.

Description of drawings

The perspective view of the lithium ion battery that Fig. 1 is provided for the utility model embodiment;

The lithium ion battery package assembly sketch map that Fig. 2 is provided for the utility model embodiment;

The structural representation of the involute core of the lithium ion battery that Fig. 3 is provided for the utility model embodiment;

The main TV structure sketch map of the positive pole ear that Fig. 4 is provided for the utility model embodiment;

The main TV structure sketch map of the negative lug that Fig. 5 is provided for the utility model embodiment;

The battery container perspective view that Fig. 6 is provided for the utility model embodiment.

Embodiment

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Referring to Fig. 1-Fig. 5; The utility model embodiment provides a kind of lithium ion battery 1, comprises a battery container 11, a battery 12 and an electrolyte, and said electrolyte mainly is filled in the battery container 11 plaing a part and conducts electricity and chemical reaction; Said battery 12 is arranged in the said battery container 11; Said battery 12 is connected and composed by most volume cores 121, thereby has improved the high rate performance of said battery 1, and the structure of most volume cores 121 has also realized the high capacity of said battery 1 monomer; Improve the chemical property of said battery 1, had vast market prospect; Each said volume core 121 is formed through the semi-automatic or artificial common coiling of machine by isometric positive plate 1211, negative plate 1212 and barrier film 1213 respectively, has overcome the problem of single said volume core 121 because of the long very difficult coiling of pole piece, has improved production efficiency; End welding aluminium strip 13 in each said positive plate 1211; End welding nickel strap 14 in each said negative plate 1212; Said battery 1 also comprise be placed on said aluminium strip 13 with the positive pole ear 15 that is used for anode be placed on said nickel strap 14 to be used for a negative lug 16 of GND; And unified said aluminium strip 13, said nickel strap 14 are welded in said positive pole ear 15, negative lug 16, compared with prior art, its operation is simpler and easy; Independently said positive pole ear 15, negative lug 16 structures are connected also more convenient in use with the external world, bulk shape is attractive in appearance.

See also Fig. 1 and combine Fig. 2, Fig. 3; A kind of embodiment of the lithium ion battery that provides as the utility model; With 3 volume cores is that example is explained; Each said volume core 121 in the form of sheets and be superimposed with each other, also adopt in concrete the application gummed paper with each said volume core 121 assembly packaging with fixing, prevent to become flexible.In the vertical direction aligns and is welded to each other through ultrasonic wave between each said aluminium strip 13, and in the vertical direction aligns and is welded to each other through ultrasonic wave between each said nickel strap 14.In the vertical direction aligns respectively, can conveniently unify welding, and ultrasonic bonding has the firm advantage of welding.

See also Fig. 4, Fig. 5 and combine Fig. 3; Said positive pole ear 15, said negative lug 16 cross sections are square or circle; The cross section of said aluminium strip 13 is corresponding with the shape of cross section of said positive pole ear 15; The cross section of said nickel strap 14 is corresponding with the shape of cross section of said negative lug 16, can just in time be complementary, and makes that assembling is seamless; Particularly, said positive pole ear 15 covers cover and supersonic welding is connected on said aluminium strip 13 peripheries; Said negative lug 16 covers cover and supersonic welding is connected on said nickel strap 14 peripheries; In concrete the application; Only need said positive pole ear 15, said negative lug 16 to be overlapped and installed through staff tool using (like tweezers); Operation is very easy, simple and easy, and ultrasonic bonding has the firm advantage of welding.

Continuation is referring to Fig. 4, Fig. 5, and particularly, said positive pole ear 15 is respectively two-sided a kind of aluminium flake and the nickel sheet that is compounded with lug glue 17 with said negative lug 16.Said positive pole ear 15 is by the aluminium flake punch forming, and said negative lug 16 is made simply by the punch forming of nickel sheet, but volume production.In conjunction with Fig. 1, Fig. 2; When said battery 1 in when work; Owing to can produce very big heat at positive and negative lug place at said battery 1; The effect of said lug glue 17 can prevent that its heat from causing the contraction of said barrier film 1213 and causing the positive and negative electrode contact to cause short circuit, solved the potential safety hazard that exists.Particularly; Rete and the surface film layer that is compounded in said middle rete both sides in the middle of said lug glue 17 comprises; The material of rete is a cross-linked polyolefin in the middle of said, and the material of said surface film layer is uncrosslinked polyolefin, and it has advantage not stratified, indeformable, that the hot melt effect is good.Need to prove; Said barrier film 1213 separation are between said positive plate 1211 and said negative plate 1212, and said barrier film 1213 adopts plastic film to process, and has the advantage of inexpensive; It can isolate the positive and negative electrode of said battery 1, to prevent short circuit; Can also when said battery 1 is overheated, intercept the conduction of current in the said battery 1 through the closed pore function.

Further, referring to Fig. 1, Fig. 6, said battery container 11 is made up of stamping forming aluminum-plastic composite membrane, and aluminum-plastic composite membrane promptly is that two-layer or three-layer plastic is composited by layer of aluminum, and it has antistatic, waterproof, protection against the tide, and is anti-at a distance from light, anti-oxygen effect.

The above is merely the utility model preferred embodiment; Its structure is not limited to the above-mentioned shape of enumerating; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.

Claims

1. lithium ion battery; Comprise a battery container, a battery and electrolyte; Said battery is arranged in the said battery container, it is characterized in that, said battery is connected and composed by most volume cores; Each said volume core is reeled jointly by isometric positive plate, negative plate and barrier film respectively and is formed; In the end welding aluminium strip of each said positive plate, in the end welding nickel strap of each said negative plate, said battery comprises that also being placed on said aluminium strip is used as a positive pole ear of anode and is placed on the negative lug of said nickel strap as GND.

2. lithium ion battery as claimed in claim 1 is characterized in that: each said volume core in the form of sheets and be superimposed with each other, in the vertical direction aligns and interconnects between each said aluminium strip, in the vertical direction aligns and interconnects between each said nickel strap.

3. lithium ion battery as claimed in claim 1; It is characterized in that: the cross section of said positive pole ear, said negative lug is square or circle; The cross section of said aluminium strip is corresponding with the shape of cross section of said positive pole ear, and the cross section of said nickel strap is corresponding with the shape of cross section of said negative lug.

4. lithium ion battery as claimed in claim 3 is characterized in that: said positive pole ear cover covers and supersonic welding is connected to said aluminium strip periphery; Said negative lug cover covers and supersonic welding is connected to said nickel strap periphery.

5. like each described lithium ion battery of claim 1-4, it is characterized in that: said positive pole ear and said negative lug are respectively two-sided aluminium flake and the nickel sheet that is compounded with lug glue.

6. lithium ion battery as claimed in claim 1 is characterized in that: said battery container is made up of stamping forming aluminum-plastic composite membrane.

7. lithium ion battery as claimed in claim 1 is characterized in that: said barrier film separation is between said positive plate and said negative plate.