CN203895531U - Safety lithium battery - Google Patents
Safety lithium battery Download PDFInfo
- Publication number
- CN203895531U CN203895531U CN201420133229.8U CN201420133229U CN203895531U CN 203895531 U CN203895531 U CN 203895531U CN 201420133229 U CN201420133229 U CN 201420133229U CN 203895531 U CN203895531 U CN 203895531U
- Authority
- CN
- China
- Prior art keywords
- lug
- lithium battery
- thickness
- anode ear
- tab
- Prior art date
- 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 - Fee Related
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 59
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 description 11
- 210000000959 ear middle Anatomy 0.000 description 5
- 150000002736 metal compounds Chemical group 0.000 description 4
- KRLDNBXEMNGJGG-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[AlH3].[Cu] KRLDNBXEMNGJGG-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UOPKUBWYNRRQFZ-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[AlH3].[Cu].[Cu].[Cu] UOPKUBWYNRRQFZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 nickel-aluminium-copper-aluminium-nickel Chemical compound 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a safety lithium battery, which aims at solving the problem of the safety accident caused by the continuous short circuit of the lithium battery because the thickness of a positive tab of the existing lithium battery is identical in the length direction and the tab cannot be fused when the short circuit happens outside the lithium battery. The safety lithium battery is characterized in that a positive tab main body is divided into an upper tab, a middle tab and a lower tab along the length direction, wherein the thickness of the middle tab or the thickness of the lower tab is smaller than that of the upper tab. When the short circuit happens outside the lithium battery, the positive tab can be automatically fused, so that the safety performance of the lithium battery can be improved.
Description
Technical field
The utility model belongs to lithium battery field, is specifically related to a kind of safe lithium battery, can improve lithium battery fail safe by the design of structure.
Background technology
World energy sources and Environmental Protection Situation day are becoming tight, and battery is more and more subject to people's favor as power source.Lithium ion battery is because its energy density is high, and volume is little, lightweight, environment friendly and pollution-free, and the remarkable advantages such as memory-less effect progressively become the first-selection of energy field.In the economic policy of carrying out at present, one of energy supply system that new-energy automobile adopts is exactly lithium ionic cell module, and the development of lithium ion battery more and more highlights in the importance of energy field.
The utility model patent that for example application number is 201220089016.0 discloses a kind of anode ear of lithium battery of aluminum-plastic composite membrane packaging, it is characterized in that, it is metal compound belt, the exposed skin of metal compound belt is aluminium lamination, metal compound belt is three layers of composite band of aluminium-copper-aluminium, and its intermediate course is copper layer.
Application number is anode ear and the method for manufacturing technology thereof that 201210062344.6 patent of invention discloses a kind of novel lithium battery, this anode ear comprises metal compound belt, metal composite band body comprises two ends, and two ends are three layers of composite band of one section of aluminium-copper-aluminium and another section of copper-aluminium-copper-aluminium-copper or five layers of composite band of nickel-aluminium-copper-aluminium-nickel; One section of exposed outside of described metal composite band body be aluminium lamination, all the other one section is exposed to outside is copper layer or nickel dam; Described copper layer or nickel dam are compound in the skin of three layers of composite band of aluminium-copper-aluminium.
But lithium battery exists certain hidden danger aspect fail safe, safety problem has hindered the development of dynamic lithium battery.Thickness is identical in the longitudinal direction for existing lithium battery anode ear, and in the time that outside batteries is short-circuited, lug can not fuse, thereby short circuit continues to cause battery persistently overheating, even causes blast on fire.Based on above reason, main purpose of the present utility model is to provide the lug of the lithium battery that a kind of security performance is high.
Utility model content
The utility model is in order to solve existing lithium battery because thickness on anode ear length direction is identical, when lithium battery outside is short-circuited, lug can not fuse and cause continuing lithium battery short circuit and cause the problem of security incident, and provide a kind of safe lithium battery, in the time of lithium battery external short circuit, anode ear can fuse automatically, thereby improves the security performance of lithium battery.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of safe lithium battery, comprise lithium cell main body, lithium cell main body is connected with anode ear and negative electrode lug, it is characterized in that, described anode ear is divided into top lug, middle part lug and bottom lug along its length, the thickness of the Thickness Ratio top lug of described middle part lug or bottom lug is little.
Further, transition arc between described anode ear main body and middle part lug or bottom lug.
Further, the thickness of described middle part lug or bottom lug thinnest part is 10%-80% of top lug thickness.
Further, the thickness of described middle part lug or bottom lug thinnest part is 40%～60% of top lug thickness.
Further, described anode ear main body is made by aluminium.
Compared with prior art, the utlity model has following beneficial effect:
Safe lithium battery of the present utility model, comprise lithium cell main body, lithium cell main body is connected with anode ear and negative electrode lug, and anode ear is divided into top lug, middle part lug and bottom lug along its length, and the thickness of the Thickness Ratio anode ear of middle part lug or bottom lug is little.The middle part or the bottom that are anode ear have local slim structure, and middle part lug or bottom lug are less than the thickness at other positions of top lug.In the time that short circuit appears in lithium battery, the partially thin place of anode ear Joule heat is large, and meeting is prior to anode ear fusing open circuit, thus the fail safe that improves lithium battery.Prevent that lithium battery from causing the persistently overheating appearance that causes blast on fire because of sustained short-circuit.
Transition arc between anode ear of the present utility model and middle part lug or bottom lug, when working as the thinner thickness of middle part lug, transition arc between top lug, bottom lug and middle part lug, in the time of the thinner thickness of bottom lug, transition arc between middle part lug and bottom lug; Other position transition arcs of the local thin type structure of anode ear and anode ear, make to there will not be the concentrated situation of stress between the local slim and anode ear of the utility model, thereby improve the useful life of anode ear.
If thickness is too thin, lithium battery is the discharge capability deviation of large electric current in normal operation; If thickness is too thick, when short circuit, lug is not easy fusing.The thickness of middle part of the present utility model lug or bottom lug thinnest part is 10%-80% of anode ear thickness; As the preferred mode of the utility model, the thickness of middle part lug or bottom lug thinnest part is 40%～60% of anode ear thickness, can both ensure the discharge capability of anode ear, and while ensureing short circuit again, lug can fuse, and improves practicality of the present utility model.
As the mode of a kind of selection of the present utility model, anode ear is made up of nickel, copper, copper nickel plating or copper nickel composite material.
Brief description of the drawings
Fig. 1 is an example structure schematic diagram of anode ear of the present utility model;
Fig. 2 is another example structure schematic diagram of anode ear of the present utility model;
Mark in figure: 1, anode ear, 2, top lug, 3, middle part lug, 4, transition arc, 5, bottom lug.
Embodiment
Below in conjunction with embodiment, the utility model will be further described, and described embodiment is only the utility model part embodiment, is not whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art, not making other embodiment used that obtain under creative work prerequisite, belongs to protection range of the present utility model.
Safe lithium battery of the present utility model, comprise lithium cell main body, lithium cell main body is connected with anode ear and negative electrode lug, and anode ear is divided into top lug, middle part lug and bottom lug along its length, and the thickness of the Thickness Ratio top lug of middle part lug or bottom lug is little.The middle part or the bottom that are anode ear have local slim structure, and middle part lug or bottom lug are less than the thickness at other positions of anode ear.In the time that short circuit appears in lithium battery, the partially thin place of anode ear Joule heat is large, and meeting is prior to anode ear fusing open circuit, thus the fail safe that improves lithium battery.Prevent that lithium battery from causing the persistently overheating appearance that causes blast on fire because of sustained short-circuit.
For the length of the local thin type structure of anode ear, the length of middle part lug, bottom lug does not have special requirement, and those skilled in the art can understand, the length of anode ear can be made according to practical application.
Transition arc between anode ear of the present utility model and middle part lug or bottom lug, when working as the thinner thickness of middle part lug, transition arc between top lug, bottom lug and middle part lug, in the time of the thinner thickness of bottom lug, transition arc between middle part lug and bottom lug; Other position transition arcs of the local thin type structure of anode ear and anode ear, make to there will not be the concentrated situation of stress between the local slim and anode ear of the utility model, thereby improve the useful life of anode ear.
As the mode of a kind of selection of the utility model, between other positions of local thin type structure and anode ear, also can adopt the mode of sudden change, but easily there is the problem that stress is concentrated in this structure.Therefore, transition arc between other positions of local thin type structure and anode ear preferably.
If local thin type structure thickness is too thin, lithium battery is the discharge capability deviation of large electric current in normal operation; If thickness is too thick, when short circuit, lug is not easy fusing.The thickness of middle part of the present utility model lug or bottom lug thinnest part is 10%-80% of top lug thickness; As the preferred mode of the utility model, the thickness of middle part lug or bottom lug thinnest part is 40%～60% of top lug thickness, should ensure the discharge capability of anode ear main body, while ensureing short circuit again, lug can fuse, need to do a large amount of calculation and tests, for a person skilled in the art, be not apparent, need to pay creative work.
As the mode of a kind of selection of the present utility model, anode ear is made up of nickel, copper, copper nickel plating or copper nickel composite material.
Below in conjunction with embodiment, the utility model is described further.
Embodiment mono-
Lithium battery capacity is 20Ah, and anode ear body thickness is 0.3mm, and thin place, anode ear middle part thickness is 0.25mm, and the thin place of lug partial-length is 2～4mm;
Embodiment bis-
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and anode ear bottom thin place thickness is 0.25mm, and the thin place of lug partial-length is 2～4mm;
Embodiment tri-
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and thin place, anode ear middle part thickness is 0.20mm, and the thin place of lug partial-length is 2～4mm;
Embodiment tetra-
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and anode ear bottom thin place thickness is 0.20mm, and the thin place of lug partial-length is 2～4mm;
Embodiment five
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and thin place, anode ear middle part thickness is 0.15mm, and the thin place of lug partial-length is 2～4mm;
Embodiment six
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and anode ear bottom thin place thickness is 0.15mm, and the thin place of lug partial-length is 2～4mm;
Embodiment seven
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and thin place, anode ear middle part thickness is 0.10mm, and the thin place of lug partial-length is 2～4mm;
Embodiment eight
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and anode ear bottom thin place thickness is 0.10mm, and the thin place of lug partial-length is 2～4mm;
Embodiment nine
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and thin place, anode ear middle part thickness is 0.05mm, and the thin place of lug partial-length is 2～4mm;
Embodiment ten
Lithium battery capacity is 20Ah, and positive pole ear body thickness is 0.3mm, and anode ear bottom thin place thickness is 0.05mm, and the thin place of lug partial-length is 2～4mm;
Contrast groups:
Lithium battery capacity is 20Ah, and anode ear main body everywhere thickness is 0.3mm;
In all tests, battery is except positive pole ear structure difference, and battery is all identical.
Above-described embodiment is of the present utility model enumerating, and is not of the present utility modelly all to enumerate, and is not departing under thought main body of the present utility model, and the improvement of having done all belongs to protection range of the present utility model.
Claims (1)
1. a safe lithium battery, comprise lithium cell main body, lithium cell main body is connected with anode ear and negative electrode lug, it is characterized in that, described anode ear is divided into top lug, middle part lug and bottom lug along its length, the thickness of the Thickness Ratio top lug of described middle part lug or bottom lug is little.
2. safe lithium battery according to claim 1, is characterized in that, the thickness of described middle part lug or bottom lug thinnest part is 10%-80% of top lug thickness.
3. safe lithium battery according to claim 2, is characterized in that, the thickness of described middle part lug or bottom lug thinnest part is 40%～60% of top lug thickness.
4. safe lithium battery according to claim 3, is characterized in that, described anode ear is made up of nickel, copper, copper nickel plating or copper nickel composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420133229.8U CN203895531U (en) | 2014-03-24 | 2014-03-24 | Safety lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420133229.8U CN203895531U (en) | 2014-03-24 | 2014-03-24 | Safety lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203895531U true CN203895531U (en) | 2014-10-22 |
Family
ID=51721892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420133229.8U Expired - Fee Related CN203895531U (en) | 2014-03-24 | 2014-03-24 | Safety lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203895531U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977441A (en) * | 2016-07-07 | 2016-09-28 | 无锡市宝来电池有限公司 | Battery electrode lug and electrode lug finishing device |
| CN107978698A (en) * | 2017-12-01 | 2018-05-01 | 合肥国盛电池科技有限公司 | Vehicular battery bag |
| CN108963176A (en) * | 2018-08-01 | 2018-12-07 | 广州鹏辉能源科技股份有限公司 | Lithium Fe battery positive pole ear and lithium Fe battery |
| CN109817875A (en) * | 2019-03-01 | 2019-05-28 | 湖北锂诺新能源科技有限公司 | Porous lightweight battery core of wedge shape and preparation method thereof |
| WO2023155616A1 (en) * | 2022-02-18 | 2023-08-24 | 惠州亿纬锂能股份有限公司 | Lithium battery |
| WO2024145848A1 (en) * | 2023-01-04 | 2024-07-11 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electrical apparatus |
-
2014
- 2014-03-24 CN CN201420133229.8U patent/CN203895531U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977441A (en) * | 2016-07-07 | 2016-09-28 | 无锡市宝来电池有限公司 | Battery electrode lug and electrode lug finishing device |
| CN107978698A (en) * | 2017-12-01 | 2018-05-01 | 合肥国盛电池科技有限公司 | Vehicular battery bag |
| CN108963176A (en) * | 2018-08-01 | 2018-12-07 | 广州鹏辉能源科技股份有限公司 | Lithium Fe battery positive pole ear and lithium Fe battery |
| CN109817875A (en) * | 2019-03-01 | 2019-05-28 | 湖北锂诺新能源科技有限公司 | Porous lightweight battery core of wedge shape and preparation method thereof |
| WO2023155616A1 (en) * | 2022-02-18 | 2023-08-24 | 惠州亿纬锂能股份有限公司 | Lithium battery |
| WO2024145848A1 (en) * | 2023-01-04 | 2024-07-11 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electrical apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |