CN202495508U - Soft package lithium ion battery and lug thereof - Google Patents
Soft package lithium ion battery and lug thereof Download PDFInfo
- Publication number
- CN202495508U CN202495508U CN2012200449869U CN201220044986U CN202495508U CN 202495508 U CN202495508 U CN 202495508U CN 2012200449869 U CN2012200449869 U CN 2012200449869U CN 201220044986 U CN201220044986 U CN 201220044986U CN 202495508 U CN202495508 U CN 202495508U
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- China
- Prior art keywords
- lug
- lithium ion
- changeover portion
- pole piece
- soft package
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a soft package lithium ion battery lug. The soft package lithium ion battery lug comprises a pole piece connecting section, a conduction section and a transition section, wherein the pole piece connecting section is connected with a pole piece; the conduction section is conducted with the outside; the transition section is connected with the pole piece connecting section and the conduction section; the thickness of the transition section is smaller than the thickness of the pole piece connecting section and the thickness of the conduction section; and the upper and lower surfaces of the transition section are bonded with high molecular material film layers. Compared with the prior art, the soft package lithium ion battery lug has the advantages: a local lug weakening structure is adopted at a sealing position on the conventional lug and aluminum-plastic packaging film, so that the gap between upper and lower two layers of aluminum-plastic packaging films can be reduced greatly, battery sealing is ensured, and leakage of an electrolyte or entrance of vapor is prevented. Meanwhile, the sealing position weakening position does not influence the mechanical strength and resistance value of the lug. Moreover, the utility model further discloses a lithium ion battery comprising the lug.
Description
Technical field
The utility model belongs to technical field of lithium ion, the lithium ion battery that relates in particular to a kind of soft package lithium ion cell polar ear and comprise this lug.
Background technology
Along with the progress of science and technology, the application of mobile device more and more widely.The quick growth of mobile device has formed the wilderness demand to high energy density cells.Lithium ion battery can be divided into the hard pack battery with stainless steel case or aluminum hull from its external packing aspect in the market, and the flexible-packed battery of packing with aluminum-plastic composite membrane.Wherein, flexible-packed battery has obtained fast development because of it has higher energy density and better fail safe.
Flexible-packed battery generally comprises electric core and aluminium plastic membrane pack case, and electric core front end is provided with lug, and lug passes from packaging film, is connected with extraneous during use, so that energy to be provided.At present, have certain mechanical strength and less relatively impedance in order to make its lug, the general use has certain thickness metal tabs, and the thickness of whole lug is even, and it is bigger to cause lug in the flexible-packed battery to pass the sealing difficulty at packaging film place.If seal badly, battery occurs leakage or inside battery easily and infiltrates steam, thereby influences product quality, even possibly cause safety problem.
In view of this, necessary a kind of lug that can improve the flexible packing lithium ion battery encapsulation performance is provided, guaranteeing battery quality and cell safety, and the lithium ion battery that comprises this lug.
The utility model content
One of purpose of the utility model is: to the deficiency of prior art, and a kind of lug that can improve the flexible packing lithium ion battery encapsulation performance is provided, to guarantee battery quality and cell safety.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of soft package lithium ion cell polar ear; Comprise the pole piece linkage section that links to each other with pole piece, with the conduction period of extraneous conducting; And the changeover portion that connects said pole piece linkage section and conduction period; The thickness of said changeover portion is less than the thickness of said pole piece linkage section and the thickness of conduction period, and the surface adhesion of said changeover portion has the macromolecule material film layer.During encapsulation, the aluminum-plastic composite membrane of battery external packing is sealed through heat-seal, and the sealing area of aluminum-plastic composite membrane at the lug place is positioned on the macromolecule material film layer of changeover portion.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, the thickness of said changeover portion is 10%～99% of said pole piece linkage section or conduction period thickness.If the thickness of said changeover portion less than 10% of said pole piece linkage section or conduction period thickness, may bring said changeover portion and pole piece linkage section or and conduction period between transitional region stress concentrate, the problem of intensity variation.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, said pole piece linkage section, changeover portion and conduction period are one.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, the transient mode between said changeover portion and the pole piece linkage section is vertical transition, angled transition or oval transition.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, the transient mode between said changeover portion and the conduction period is vertical transition, angled transition or oval transition.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, a side of said changeover portion is provided with thinned region.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, the bilateral of said changeover portion is equipped with thinned region.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, said changeover portion surface is coated with the macromolecule material film layer fully.
As a kind of improvement of the utility model soft package lithium ion cell polar ear, said changeover portion surface portion is coated with the macromolecule material film layer.
With respect to prior art, the utility model has adopted the structure of the local skiving of lug at the sealing station of traditional lug and plastic-aluminum packaging film.Can reduce the gap between the two-layer plastic-aluminum packaging film up and down so greatly, guarantee cell sealing, prevent that electrolyte leakage or steam from getting into.Simultaneously, this structure at the sealing station skiving can not influence the mechanical strength and the resistance size of lug.In addition, the utility model need not introduced new material, and manufacture method is simple, is convenient to produce in batches.
Another purpose of the utility model is to provide a kind of lithium ion battery; Comprise electric core and plastic-aluminum packaging film; Electricity core front end is provided with lug, and lug passes from plastic-aluminum packaging film, and said lug is the described lug of above-mentioned paragraph; During encapsulation, plastic-aluminum packaging film is positioned on the macromolecule material film layer of changeover portion at the sealing area at lug place.With respect to prior art, the lithium ion battery of the utility model has good encapsulation performance and security performance.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is the utility model lithium ion battery structure sketch map;
Fig. 2 is provided with the collector body of skiving groove for the utility model;
Fig. 3 is provided with the lug sketch map of thinned region for the utility model one side;
Fig. 4 is equipped with the lug sketch map of thinned region for the utility model both sides;
Fig. 5 is a kind of extreme ear structure sketch map of the utility model;
Fig. 6 is the another kind of extreme ear structure sketch map of the utility model;
Fig. 7 posts the lug crowd of high molecular film material layer for the utility model;
Fig. 8 posts the lug of high molecular film material layer for the utility model.
Embodiment
As shown in Figure 1, a kind of lithium ion battery of the utility model comprises electric core 7 and plastic-aluminum packaging film 8; Electricity core 7 front ends are provided with lug 9, and lug 9 passes from plastic-aluminum packaging film 8, wherein; Like Fig. 2, shown in 3,4 and 5; Lug 9 comprise the pole piece linkage section 3 that links to each other with pole piece, with the conduction period 1 of extraneous conducting, and the changeover portion 2 that connects said pole piece linkage section 3 and conduction period 1, the thickness of said changeover portion 2 is less than the thickness of said pole piece linkage section 3 and the thickness of conduction period 1; The surface adhesion of said changeover portion 2 has macromolecule material film layer 6, and said pole piece linkage section 3, changeover portion 2 and conduction period 1 are one, and the thickness of said changeover portion 2 is 10%～99% of said pole piece linkage section 3 or conduction period 1 thickness; During encapsulation, plastic-aluminum packaging film 8 is positioned on the macromolecule material film layer 6 of changeover portion 2 at the sealing area at lug 9 places.
Wherein, Transient mode between said changeover portion 2 and the pole piece linkage section 3 is vertical transition, angled transition or oval transition; Transient mode between said changeover portion 2 and the conduction period 1 is vertical transition, angled transition or oval transition; Wherein changeover portion 2 can adopt a side to be provided with the mode of thinned region, also can adopt bilateral to be equipped with the mode of thinned region.
The surface of said changeover portion 2 can be coated with macromolecule material film layer 6 fully, also can partly be coated with macromolecule material film layer 6.
Wherein, the manufacturing approach of the utility model soft package lithium ion cell polar ear 9 is:
At first; As shown in Figure 2; Produce and meet corresponding size demand skiving groove (changeover portion 2) making on the original metal thin plate of lug 9 technology with turning or turnning and milling; Can adopt one-sided skiving and bilateral skiving dual mode (shown in Fig. 3 and 4); Transient mode between said changeover portion 2 and the pole piece linkage section 3 can be vertical transition, angled transition or oval transition, and the transient mode between said changeover portion 2 and the conduction period 1 can be vertical transition, angled transition or oval transition (as illustrated in Figures 5 and 6).Macromolecule material film layer 6 is cut into strip material;
Secondly, sheet metal is cut into metal tape along the direction vertical with groove (changeover portion 2) according to the width requirement of lug 9.Along placing at interval, make high molecular film material layer 6 be in skiving groove (changeover portion 2) position of metal tape metal tape with the banded thin-film material vertical direction of macromolecule.Then, on above-mentioned metal tape, vertically place high molecular film material layer 6 again, and make upper and lower two-layer high molecular film material layer 6 be superimposed with each other (as shown in Figure 7).Material process hot press hot pressing with above-mentioned stack makes metal tape and high molecular film material layer 6 heat be combined with each other;
At last, as shown in Figure 8, two-layer high molecular film material layer 6 and compound metal tape thereof are cut into the lug of battery according to corresponding size.
At first at the metal (Ni that makes collector body; Al; Cu) technology with turning or turnning and milling produces corresponding skiving groove (changeover portion 2) on the thin plate; This example adopts the mode (as shown in Figure 3) of one-sided skiving, and the width of groove (changeover portion 2) is 5mm, and the distance between adjacent two row's grooves (changeover portion 2) is 45mm.Transient mode (as shown in Figure 5) vertical and inclination is adopted in 1 transition with 3 of pole piece linkage sections of groove (changeover portion 2) and conduction period respectively;
Secondly, along the direction vertical sheet metal is cut into the metal tape that has groove (changeover portion 2) that width is 4mm with groove (changeover portion 2).Then, along locating respectively to place one deck high molecular film material layer 6 up and down, and make upper and lower two-layer high molecular film material layer 6 be superimposed with each other with the groove (changeover portion 2) of above-mentioned metal tape vertical direction; Then, the material of above-mentioned stack is hot-pressed onto together, makes metal current collector and high molecular film material layer 6 be combined with each other, as shown in Figure 7;
At last, like Fig. 8, size as requested cuts into the lug 8 of battery with high molecular film material layer 6 and its compound collector body, and the length of gained lug conduction period 1 is 10mm, and thickness is 0.08mm; The length of pole piece linkage section 3 is 30mm, and thickness is 0.08mm; The length of changeover portion 2 is 5mm, and thickness is 0.05mm; The width of the compound back of heat high molecular film material layer 6 is 4.5mm.
The lug 9 of above-mentioned making is used for the battery that model is 423482 (thickness is 4.2mm, and width is 34mm, and length is 82mm); And test its impedance; The testing impedance result is 30.67m Ω (1KHz), and after the hot and humid experiment of process, the failure rate at its lug 9 places of soaked experimental check is 0.3ppm;
The impedance of the electric core of group (the equal 0.08mm of the thickness that lug is three sections) is 30.00m Ω (1KHz) as a comparison, and after the same hot and humid experiment of process, the failure rate at its lug 9 places of soaked experimental check is 0.7ppm.
At first at the metal (Ni that makes collector body; Al; Cu) technology with turning or turnning and milling produces corresponding skiving groove (changeover portion 2) on the thin plate; This example adopts the mode of bilateral skiving (as shown in Figure 4), and the width of groove (changeover portion 2) is 5mm, and the distance between adjacent two row's grooves (changeover portion 2) is 45mm.The transition that groove (changeover portion 2) and 1 of conduction period and pole piece linkage section are 3 is adopted respectively and oval transient mode (as shown in Figure 6).Secondly, along the direction vertical sheet metal is cut into the metal tape that has groove (changeover portion 2) that width is 4mm with groove (changeover portion 2).Then, along locating respectively to place one deck high molecular film material layer 6 up and down, and make upper and lower two-layer high molecular film material layer 6 be superimposed with each other with the groove (changeover portion 2) of above-mentioned metal tape vertical direction; Then, the material of above-mentioned stack is hot-pressed onto together, makes metal current collector and high molecular film material layer 6 be combined with each other, as shown in Figure 7;
At last, like Fig. 8, size as requested cuts into the lug 9 of battery with high molecular film material layer 6 and its compound collector body, and the length of gained lug conduction period 1 is 10mm, and thickness is 0.1mm; The length of pole piece linkage section 3 is 30mm, and thickness is 0.1mm; The length of changeover portion 2 is 5mm, and thickness is 0.08mm; The width of high molecular film material layer 6 is 4.5mm after the hot pressing.
The lug 9 of above-mentioned making is used for the battery that model is 423482 (thickness is 4.2mm, and width is 34mm, and length is 82mm), and tests its impedance, the testing impedance result is 28.22m Ω (1KHz);
As a comparison the thickness of group evenly and be the lug of 0.08mm, the electric core that comprises this lug has identical sealing effectiveness (be after the hot and humid experiment failure rate equal), but its testing impedance result is 30.00m Ω (1KHz).
Above-mentioned embodiment 1 shows, can improve the sealing problem of plastic-aluminum packaging film 8 at lug 9 places greatly behind the lug 9 of employing the utility model; Embodiment 2 shows that then plastic-aluminum packaging film 8 can reduce the internal resistance of battery behind the lug 9 of employing the utility model under the identical situation of the sealing effectiveness at lug 9 places.
Certainly, the above is merely wherein two embodiment of the utility model, does not therefore limit the protection range of the utility model.For example; In the utility model; Can adopt different sizes as the metal tape (positive and negative collector body) of battery pole ear 9 based on the actual application requirements with the skiving position, and the thickness of skiving can be according to the sealing effectiveness that reaches of require, the mechanical strength of the internal resistance of cell and lug 9 is adjusted.
Announcement and instruction according to above-mentioned specification; The utility model those skilled in the art can also change and revise above-mentioned execution mode; Therefore; The embodiment that discloses and describe above the utility model is not limited to also should fall in the protection range of the utility model claim some modifications and the change of the utility model.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the utility model is not constituted any restriction.
Claims (10)
1. soft package lithium ion cell polar ear; Comprise the pole piece linkage section that links to each other with pole piece, with the conduction period of extraneous conducting; And the changeover portion that connects said pole piece linkage section and conduction period; It is characterized in that: the thickness of said changeover portion is less than the thickness of said pole piece linkage section and the thickness of conduction period, and the surface adhesion of said changeover portion has the macromolecule material film layer.
2. soft package lithium ion cell polar ear according to claim 1 is characterized in that: the thickness of said changeover portion is 10%～99% of said pole piece linkage section or conduction period thickness.
3. soft package lithium ion cell polar ear according to claim 1 is characterized in that: said pole piece linkage section, changeover portion and conduction period are one.
4. soft package lithium ion cell polar ear according to claim 3 is characterized in that: the transient mode between said changeover portion and the pole piece linkage section is vertical transition, angled transition or oval transition.
5. soft package lithium ion cell polar ear according to claim 3 is characterized in that: the transient mode between said changeover portion and the conduction period is vertical transition, angled transition or oval transition.
6. soft package lithium ion cell polar ear according to claim 1 and 2 is characterized in that: a side of said changeover portion is provided with thinned region.
7. soft package lithium ion cell polar ear according to claim 1 and 2 is characterized in that: the bilateral of said changeover portion is equipped with thinned region.
8. soft package lithium ion cell polar ear according to claim 1 is characterized in that: said changeover portion surface is coated with the macromolecule material film layer fully.
9. soft package lithium ion cell polar ear according to claim 1 is characterized in that: said changeover portion surface portion is coated with the macromolecule material film layer.
10. lithium ion battery; Comprise electric core and plastic-aluminum packaging film; Electricity core front end is provided with lug, and lug passes from plastic-aluminum packaging film, it is characterized in that: said lug is each described lug of claim 1 to 9; During encapsulation, plastic-aluminum packaging film is positioned on the macromolecule material film layer of changeover portion at the sealing area at lug place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200449869U CN202495508U (en) | 2012-02-13 | 2012-02-13 | Soft package lithium ion battery and lug thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200449869U CN202495508U (en) | 2012-02-13 | 2012-02-13 | Soft package lithium ion battery and lug thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202495508U true CN202495508U (en) | 2012-10-17 |
Family
ID=47001721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200449869U Expired - Lifetime CN202495508U (en) | 2012-02-13 | 2012-02-13 | Soft package lithium ion battery and lug thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202495508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123091A (en) * | 2016-11-30 | 2018-06-05 | 宝山钢铁股份有限公司 | A kind of nearly cross-section gradually modification lug |
| WO2021228164A1 (en) * | 2020-05-12 | 2021-11-18 | 路华置富电子(深圳)有限公司 | Tab, and battery structure using same |
| CN114824677A (en) * | 2022-04-18 | 2022-07-29 | 珠海中科先进技术研究院有限公司 | Soft package battery |
-
2012
- 2012-02-13 CN CN2012200449869U patent/CN202495508U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123091A (en) * | 2016-11-30 | 2018-06-05 | 宝山钢铁股份有限公司 | A kind of nearly cross-section gradually modification lug |
| WO2021228164A1 (en) * | 2020-05-12 | 2021-11-18 | 路华置富电子(深圳)有限公司 | Tab, and battery structure using same |
| CN114824677A (en) * | 2022-04-18 | 2022-07-29 | 珠海中科先进技术研究院有限公司 | Soft package battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121017 |