CN202977579U - Soft package polymer lithium ion battery capable of avoiding liquid leakage - Google Patents
Soft package polymer lithium ion battery capable of avoiding liquid leakage Download PDFInfo
- Publication number
- CN202977579U CN202977579U CN2012206284198U CN201220628419U CN202977579U CN 202977579 U CN202977579 U CN 202977579U CN 2012206284198 U CN2012206284198 U CN 2012206284198U CN 201220628419 U CN201220628419 U CN 201220628419U CN 202977579 U CN202977579 U CN 202977579U
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- Prior art keywords
- lithium ion
- battery
- ion battery
- polymer lithium
- pole lug
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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)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to the technical field of a soft package polymer lithium ion battery, and particularly relates to a soft package polymer lithium ion battery capable of avoiding liquid leakage. The soft package polymer lithium ion battery comprises a battery core, an aluminium-plastic packaging film contained in the battery core, and electrolyte filled in the aluminium-plastic packaging film, wherein the battery core comprises a positive pole lug, a fuse pole lug which is welded in the positive pole lug, and a negative pole lug; and the edge(s) of the end part(s) of the negative pole lug and/or the fuse pole lug has an arc bevel edge structure. When the battery flows on a production line, the negative pole lug and/or the fuse pole lug with the arc bevel edge structure impacts and contacts other battery surfaces, and the contact area between the negative pole lug and/or the fuse pole lug and the other battery surfaces are much larger than that between a right-angle pole lug and other battery surfaces, and the pressure of unit area is greatly reduced, so that the aluminium-plastic packaging film of the outer layer of the soft package polymer lithium ion battery cannot be punctured, increased gas generated by water vapor flowing into the battery and pollution caused by electrolyte leakage are avoided, and the safety performance and the electrical property of the soft package lithium ion battery are ensured.
Description
Technical field
The utility model relates to the soft-packaged polymer lithium ion battery technical field, relates in particular to a kind of soft-packaged polymer lithium ion battery that prevents leakage.
Background technology
Lithium ion battery is a kind of chemical energy storage device with high-energy-density, along with the development of electronic technology, the portable electron device such as MP3, MP4, DVD, mobile phone and notebook computer and electric automobile are more and more higher to energy density and the requirement in useful life of battery.Soft-packaged polymer lithium ion battery has that energy density is high, long service life and security reliability advantages of higher, therefore is widely used.
Soft-packaged polymer lithium ion battery generally comprises battery core, be used for holding the plastic-aluminum packaging film of battery core and be poured into electrolyte in packaging bag, battery core comprise cathode sheets, anode strip and be interval in cathode sheets and anode strip between barrier film.Generally speaking, the packaging bag used of soft-packaged polymer lithium ion battery is plastic-aluminum packaging film.Plastic-aluminum packaging film is generally three-decker: be positioned at outermost nylon layer, at polypropylene layer and the aluminium lamination between nylon layer and polypropylene layer of innermost layer.Wherein, aluminium lamination not only can provide certain forming ability and mechanical strength, can also intercept entering of steam.Therefore, it is vital keeping integrality and the sealing of aluminium lamination.But in plastic-aluminum packaging film, the thickness of aluminium lamination is about between 30 microns ~ 40 microns, and its matter is soft, is easily punctured by sharp object to cause the damaged leakage of battery.And exposing two lugs in the soft-packaged polymer lithium ion battery assembling process, be respectively anode ear, negative electrode lug, and the part battery can weld the fuse that is used for preventing overcurrent after completing charging on anode ear.The anode ear material is aluminium, and negative electrode lug and fuse conduction lug material are nickel or copper nickel plating.Present soft-packaged polymer lithium ion battery lug in assembling process is all the right angle, and negative electrode lug and fuse conduction lug material (nickel or copper nickel plating) is harder, easily pricks to other battery surface, its outer field plastic-aluminum packaging film to be punctured and cause leakage.
The use procedure of soft-packaged polymer lithium ion battery is a process that constantly discharges and recharges, the dynamic electric chemical reaction is constantly carried out in battery core inside, there is multiple organic solvent battery core inside, the plastic-aluminum packaging film of sealed package battery core is in case occur damaged, organic solvent in battery runs into and just decomposes rapidly after airborne water and oxygen and produce gas, this can cause the cell expansion distortion, and can cause adverse effect to the electrical property (as capacity, cycle life and discharge platform etc.) of battery, even also may be explosion caused etc. safety problem.
The utility model content
The purpose of this utility model is: the deficiency that is easily punctured by the hard lug of other battery for plastic-aluminum packaging film in prior art, and a kind of soft-packaged polymer lithium ion battery that prevents leakage is provided, have good security performance and electrical property to guarantee battery.
For achieving the above object, the utility model adopts following technical scheme: a kind of soft-packaged polymer lithium ion battery that prevents leakage, comprise battery core, be contained in the plastic-aluminum packaging film of described battery core and be poured into the interior electrolyte of described plastic-aluminum packaging film, described battery core comprises anode ear, is welded in fuse lug and the negative electrode lug of described anode ear, and the edge at the position, termination of described negative electrode lug and/or described fuse lug is circular arc hypotenuse structure.
Described circular arc hypotenuse structure comprises circular arc portion and hypotenuse straight line.
The quantity of described circular arc portion is set to one; The radian of described circular arc portion be less than or equal to the radian of diameter circle 1/2nd and more than or equal to 1/3rd of the radian of diameter circle.
The quantity of described circular arc portion is set to two, and each described circular arc portion is all tangent with horizontal linear.The radian of each described circular arc portion be less than or equal to the radian of diameter circle 1/4th and more than or equal to the sixth with the radian of diameter circle.
The radius of described circular arc portion is 0.5 ~ 4mm.
The width of described negative electrode lug and described fuse lug is 2 ~ 7mm.
the beneficial effects of the utility model are: the edge that the utility model arranges the position, termination of negative electrode lug and/or fuse lug is circular arc hypotenuse structure, when battery circulates on the product line, the contact area when negative electrode lug of circular arc hypotenuse structure and/or fuse lug contact with the collision of other battery surface is than large many of right angle lug, the pressure of unit are significantly reduces, therefore can not puncture the outer plastic-aluminum packaging film of soft-packaged polymer lithium ion battery, avoid steam to enter inside battery and produce the pollution of rising by gas and causing because of electrolyte leakage, guarantee security performance and the electrical property of flexible packing lithium ion battery.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 of the present utility model.
Fig. 2 is the structural representation of embodiment 2 of the present utility model.
Fig. 3 is the structural representation of embodiment 3 of the present utility model.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment 1As shown in Figure 1, a kind of soft-packaged polymer lithium ion battery that prevents leakage, comprise battery core, be contained in the plastic-aluminum packaging film of battery core and be poured into the interior electrolyte of plastic-aluminum packaging film, battery core comprises anode ear, is welded in fuse lug and the negative electrode lug of anode ear, and the edge at the position, termination of negative electrode lug and/or fuse lug is circular arc hypotenuse structure.
Preferably, circular arc hypotenuse structure comprises circular arc portion 2 and hypotenuse straight line 3.
Preferably, the radian of circular arc portion 2 be less than or equal to the radian of diameter circle 1/2nd and more than or equal to 1/3rd of the radian of diameter circle.
More excellent, the quantity of circular arc portion 2 is set to two, and each circular arc portion 2 is all tangent with horizontal linear 4.The radian of each circular arc portion 2 be less than or equal to the radian of diameter circle 1/4th and more than or equal to the sixth with the radian of diameter circle
Preferably, the width of negative electrode lug and fuse lug is 2mm.
Adopt following method can obtain the utility model: at first to make special-purpose sanction lug machine, be equipped with on it be used to the Special punching cutter of cutting 2mm negative electrode lug and fuse lug, adopt " Air-Uplift " butt formula, negative electrode lug and fuse lug one-step punching are formed a circular arc hypotenuse structure, the radius of circular arc portion 2 is 0.5mm, hypotenuse straight line 3 is 150 degree with the angle of vertical straight line (not shown), and negative electrode lug and fuse lug are located permissible variation and be ± 0.6mm in punching tool.In the situation that the circular arc hypotenuse structure of the negative electrode lug of the present embodiment and/or fuse lug and other battery bump, the plastic-aluminum packaging film of other battery can not produce any breakage and leakage, has good operability and versatility.
Other structure is identical with embodiment 1, repeats no more here.
Other structure is identical with embodiment 2, repeats no more here.
can find out in conjunction with top description, when the utility model soft-packaged polymer lithium ion battery shifts in the multiple working procedure manufacture process and between operation, the contact area when circular arc portion 2 at the position, termination of negative electrode lug and/or fuse lug and hypotenuse straight line 3 can increase with other battery collisions greatly, reduce the suffered pressure of polymer Li-ion battery surface plastic-aluminum packaging film, therefore can reduce soft-packaged polymer lithium ion battery occurs to clash into damaged, the pollution of rising by gas and causing because of electrolyte leakage of avoiding steam to enter inside battery and producing, guarantee the security performance of flexible packing lithium ion battery.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change and revise above-mentioned execution mode.Therefore, the utility model is not limited to above-mentioned embodiment, and any apparent improvement, replacement or modification that every those skilled in the art have done on basis of the present utility model all belong to protection range of the present utility model.In addition, although used some specific terms in this specification, these terms do not consist of any restriction to the utility model just for convenience of description.
Claims (7)
1. soft-packaged polymer lithium ion battery that can prevent leakage, comprise battery core, be contained in the plastic-aluminum packaging film of described battery core and be poured into the interior electrolyte of described plastic-aluminum packaging film, described battery core comprises anode ear, is welded in fuse lug and the negative electrode lug of described anode ear, it is characterized in that: the edge at the position, termination of described negative electrode lug and/or described fuse lug is circular arc hypotenuse structure.
2. the soft-packaged polymer lithium ion battery that prevents leakage according to claim 1, it is characterized in that: described circular arc hypotenuse structure comprises circular arc portion (2) and hypotenuse straight line (3).
3. the soft-packaged polymer lithium ion battery that prevents leakage according to claim 1, it is characterized in that: described circular arc portion (2) is all tangent with hypotenuse straight line (3).
4. the soft-packaged polymer lithium ion battery that prevents leakage according to claim 2, it is characterized in that: the quantity of described circular arc portion (2) is set to one; The radian of described circular arc portion (2) be less than or equal to the radian of diameter circle 1/2nd and more than or equal to 1/3rd of the radian of diameter circle.
5. the soft-packaged polymer lithium ion battery that prevents leakage according to claim 4, it is characterized in that: the quantity of described circular arc portion (2) is set to two, each described circular arc portion (2) is all tangent with horizontal linear (4), the radian of each described circular arc portion (2) be less than or equal to the radian of diameter circle 1/4th and more than or equal to the sixth with the radian of diameter circle.
6. the soft-packaged polymer lithium ion battery that prevents leakage according to claim 5, it is characterized in that: the radius of described circular arc portion (2) is 0.5 ~ 4mm.
7. the soft-packaged polymer lithium ion battery that prevents leakage according to claim 1, it is characterized in that: the width of described negative electrode lug and described fuse lug is 2 ~ 7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206284198U CN202977579U (en) | 2012-11-26 | 2012-11-26 | Soft package polymer lithium ion battery capable of avoiding liquid leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206284198U CN202977579U (en) | 2012-11-26 | 2012-11-26 | Soft package polymer lithium ion battery capable of avoiding liquid leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202977579U true CN202977579U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206284198U Expired - Lifetime CN202977579U (en) | 2012-11-26 | 2012-11-26 | Soft package polymer lithium ion battery capable of avoiding liquid leakage |
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| Country | Link |
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| CN (1) | CN202977579U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024031313A1 (en) * | 2022-08-09 | 2024-02-15 | 宁德新能源科技有限公司 | Electrode sheet, electrochemical apparatus, and electronic device |
-
2012
- 2012-11-26 CN CN2012206284198U patent/CN202977579U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024031313A1 (en) * | 2022-08-09 | 2024-02-15 | 宁德新能源科技有限公司 | Electrode sheet, electrochemical apparatus, and electronic device |
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| 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: 20130605 |