CN101834317A - Coiled lithium battery cell - Google Patents
Coiled lithium battery cell Download PDFInfo
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- CN101834317A CN101834317A CN200910047490A CN200910047490A CN101834317A CN 101834317 A CN101834317 A CN 101834317A CN 200910047490 A CN200910047490 A CN 200910047490A CN 200910047490 A CN200910047490 A CN 200910047490A CN 101834317 A CN101834317 A CN 101834317A
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- battery
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- lithium battery
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a coiled lithium battery cell, which is positioned in a battery cartridge and respectively connected with leading-out terminals of an anode and a cathode of the battery cartridge through a conductive connecting piece. The battery cell mainly comprises a battery inner core and a battery outer core, wherein the battery outer core is formed by sequentially stacking a positive plate, a membrane and a negative plate, then coiled to be a coiled shape and packed on the battery inner core.
Description
Technical field
The present invention relates to a kind of lithium battery, especially a kind of electric core of coiling type lithium battery.
Background technology
In recent years, along with the fast development of electric tool, electronic toy, electric bicycle, hybrid vehicle etc., more and more higher requirement has been proposed for the high power discharge ability of storage battery.The power-type lithium ion storage battery is owing to have preferably the high-power operation performance and high-energy-density and advantage such as light, thereby just promoted the use of above field step by step.
At present, the formation of the electrode cores of lithium battery mainly contains stacked and two kinds of main modes of takeup type.Wherein stacked to have a catchment effect even, and automatization level height, positive plate or negative plate are easily realized thick typeization, the advantage that helps reducing cost; But the lamination type electric core lithium battery is higher to the required precision of process equipment, especially the girth along with electric core positive plate and the die-cut edge of negative plate is multiplied, cause being easy to generate burr in film-making and the assembling process, further can cause problems such as short circuit, qualification rate is low, the follow-up hidden danger of use is also higher, also safety problem can take place under the extreme case.Patent CN200620067095.X discloses a kind of coiled lithium battery cell, this takeup type electricity core is made simple, film-making, assembling process are general to equipment precision requirement, the production efficiency height, cost is lower, but because there is the place of higher curvature in takeup type electricity core, fracture, the active material that in the process of positive plate and negative pole thickness of slab typeization, is easy to generate positive plate or negative plate problem such as come off.
And along with the increase of lithium battery capacity, volume of battery is increasing, and the heat that produces in the battery charge and discharge process is also more and more higher, causes away from the internal temperature of battery outer surface seriously higherly, is easy to generate thermal runaway, causes security risk.
Summary of the invention
An object of the present invention is to solving in the prior art, coiled lithium battery cell is because higher curvature, easily cause problems such as pole plate fracture, active material come off, by mode at the inner interpolation of coiled lithium battery cell inner core, increase the radius of curvature that coiled lithium battery cell is reeled, solve because the technical problem that higher curvature causes the fracture of takeup type electricity core pole plate, active material to come off.
Another object of the present invention, in order to solve in the prior art, in the charging and discharging lithium battery process, internal temperature of battery is too high, be easy to generate thermal runaway, cause security risk, by taking hollow battery inner core, and fill the material of strong heat absorption heat accumulation effect or fire retarding effect at the battery inner core, reduce the security risk of lithium battery.
In order to achieve the above object, the technical solution adopted in the present invention is, a kind of coiled lithium battery cell is provided, this electricity core is positioned at battery can inside, pass through conducting connecting part, be connected with the leading-out terminal of negative pole with battery can is anodal respectively, this battery battery core mainly comprises, a battery inner core and the outer core of battery; The outer core of described battery stacks gradually placement by positive plate, barrier film, negative plate, and is wound into vortex-likely, is wrapped on the described battery inner core.
Further, described battery inner core is that both sides are circular-arc objects.
Further, the arc diameter of described battery inner core both sides is 1～8mm.
Further, the arc diameter of described battery inner core both sides is 3～6mm.
Further, described battery inner core is closed hollow-core construction, or the open type hollow-core construction.
Further, the material of described battery inner core is polyethylene or polypropylene, perhaps polyethylene and polyacrylic mixture, perhaps nickel plating metal or copper facing metal, the perhaps metal of organic substance parcel.
Further, in the described closed hollow battery inner core, be filled with the material of strong heat absorption heat accumulation effect.
Further, in the described closed hollow battery inner core, be filled with the material of fire retarding effect.
Further, described have strong endothermic effect material to be: paraffin or paraffin and metal mixture or paraffin and graphite mixture or paraffin and carbon fiber mixture.
Further, described have the material of fire retarding effect to be: 1,2-ethenylidene carbonic ester, 3-phenyl phosphate ester, 3-butyl phosphoric acid ester, three-2,2,2-three fluoro ethyl phosphates, two-2,2,2-three fluoro ethyl-methyl phosphates, 2,2,2-three fluoro ethyl-diethyl phosphate, ethylene ethyl phosphate, two fluoro methyl acetates, methyl-2,2,2-three fluoro ethyl carbonate esters, ethyl-2,2,2-three fluoro ethyl carbonate esters, propyl group-2,2, one or more in the 2-three fluoro ethyl carbonate esters.
The present invention compared with prior art, its effect is actively and significantly.In the technical program, by in coiled lithium battery cell inside, add the mode of inner core, increased the lithium battery pole coiled sheet around radius of curvature, reduced the technical problem that higher curvature causes the fracture of takeup type electricity core pole plate, active material to come off; By taking hollow battery inner core, and at the inner heat absorption thermal resistance effector substance by force of filling of battery inner core, as fill paraffin or paraffin and metal mixture or paraffin and graphite mixture or paraffin and carbon fiber mixture etc., can absorb the heat that lithium battery produces in charge and discharge process, reduce working temperature, improve security performance; By material at the inner filling of battery inner core fire retarding effect, as fill 1,2-ethenylidene carbonic ester, the 3-phenyl phosphate ester, 3-butyl phosphoric acid ester, three-2,2,2-three fluoro ethyl phosphates, two-2,2,2-three fluoro ethyl-methyl phosphates, 2,2,2-three fluoro ethyl-diethyl phosphate, the ethylene ethyl phosphate, two fluoro methyl acetates, methyl-2,2,2-three fluoro ethyl carbonate esters, ethyl-2,2,2-three fluoro ethyl carbonate esters, propyl group-2,2, one or more in the materials such as 2-three fluoro ethyl carbonate esters are when lithium battery is short-circuited by acupuncture or inside, cause under the thermal runaway situation, the filler of battery inner core can be released, and organizes the battery burning, greatly reduces risk.
Description of drawings
Fig. 1 is a battery inner core schematic diagram of the present invention;
Fig. 2 is the hollow battery inner core of an open type of the present invention schematic diagram;
Fig. 3 is a battery structural representation of the present invention;
Fig. 4 is to be the lithium battery structure schematic diagram of battery with the present invention.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
Battery structural representation of the present invention as shown in Figure 3, battery inner core 1 is positioned at the inside of battery, stacks gradually placement by positive plate 2, barrier film 4, negative plate 3, and is wound into the outer core of vortex-like battery, be wrapped on the battery inner core 1, formed the entire cell cored structure.Because battery inner core 1, has increased the radius of curvature when reeling greatly as the initial core body of coiling of the outer core of battery, fracture, the active material that has reduced to take place when reeling positive plate or negative plate situation such as come off.
As shown in Figure 1, lithium battery battery inner core 1 of the present invention is circular-arc objects for both sides; The diameter of its two ends circular arc is 1～8mm, is preferably 3～6mm, and the battery circular arc radian of the big large-sized lithium battery of capacity can be greatly; The material of this battery inner core 1 can be polythene PE or polypropylene PP, perhaps polyethylene and polyacrylic mixture, perhaps nickel plating metal or copper facing metal (as the nickel plating metallic iron), the perhaps metal of organic substance parcel (as the metallic aluminium outer surface by polythene PE or polypropylene PP parcel).
As shown in Figure 2, for the hollow battery core arrangement of open type of the present invention, also battery inner core 1 can be made closed hollow-core construction.At closed hollow battery structure, can be at the inner material of filling of hollow battery with the heat accumulation effect of absorbing heat more by force, such as filling paraffin, easy conduction material such as paraffin and metal, graphite, carbon fiber etc. can also be mixed filling, increasing the heat-conducting effect of paraffin, heat that can fast Absorption lithium battery electric core inside.Because the filling of material such as paraffin can effectively reduce the entire cell core, the working temperature of battery inner core is especially improved the operational environment of lithium battery electric core, has reduced the probability of battery generation thermal runaway, improves security performance and unfailing performance.At closed hollow battery structure, also can be at the inner material of filling of hollow battery with fire retarding effect, as fill 1,2-ethenylidene carbonic ester, the 3-phenyl phosphate ester, 3-butyl phosphoric acid ester, three-2,2,2-three fluoro ethyl phosphates, two-2,2,2-three fluoro ethyl-methyl phosphates, 2,2,2-three fluoro ethyl-diethyl phosphate, the ethylene ethyl phosphate, two fluoro methyl acetates, methyl-2,2,2-three fluoro ethyl carbonate esters, ethyl-2,2,2-three fluoro ethyl carbonate esters, propyl group-2,2, in the materials such as 2-three fluoro ethyl carbonate esters one or more, work as lithium battery so and be short-circuited by acupuncture or inside, cause under the thermal runaway situation, the filler of battery inner core can be released, organize the battery burning, greatly reduce risk.
As shown in Figure 4, being is the lithium battery structure schematic diagram of battery with the present invention.Battery 5 of the present invention is packed in the battery can 6, and the both positive and negative polarity of battery is connected with negative pole leading-out terminal 7 with the anodal leading-out terminal 8 of battery can 6 by conducting connecting part, and battery cover 9 and battery can 6 pass through laser welded seal; Also be provided with explosionproof hole 10 on the battery cover 9, also be provided with insulated enclosure pad 11 between anodal leading-out terminal 8 and negative pole leading-out terminal 7 and the battery cover 9.
Claims (10)
1. coiled lithium battery cell, this electricity core is positioned at battery can inside, by conducting connecting part, is connected with the leading-out terminal of negative pole with battery can is anodal respectively, it is characterized in that: this electricity core mainly comprises, battery inner core and battery be core outward; The outer core of described battery stacks gradually placement by positive plate, barrier film, negative plate, and is wound into vortex-likely, is wrapped on the described battery inner core.
2. a kind of coiled lithium battery cell as claimed in claim 1 is characterized in that: described battery inner core is that both sides are circular-arc objects.
3. a kind of coiled lithium battery cell as claimed in claim 2 is characterized in that: the arc diameter of described battery inner core both sides is 1～8mm.
4. a kind of coiled lithium battery cell as claimed in claim 3 peculiarly just is: the arc diameter of described battery inner core both sides is 3～6mm.
5. as any one a kind of coiled lithium battery cell as described in the claim 1 to 4, it is characterized in that: described battery inner core is closed hollow-core construction, or the open type hollow-core construction.
6. as any one a kind of coiled lithium battery cell as described in the claim 1 to 4, it is characterized in that: the material of described battery inner core is polyethylene or polypropylene, perhaps polyethylene and polyacrylic mixture, perhaps nickel plating metal or copper facing metal, the perhaps metal of organic substance parcel.
7. a kind of coiled lithium battery cell as claimed in claim 5 is characterized in that: in the described closed hollow battery inner core, be filled with the material of strong heat absorption heat accumulation effect.
8. a kind of coiled lithium battery cell as claimed in claim 5 is characterized in that: in the described closed hollow battery inner core, be filled with the material of fire retarding effect.
9. a kind of coiled lithium battery cell as claimed in claim 7 is characterized in that, described have strong endothermic effect material to be: paraffin or paraffin and metal mixture or paraffin and graphite mixture or paraffin and carbon fiber mixture.
10. a kind of coiled lithium battery cell as claimed in claim 8, it is characterized in that, described have the material of fire retarding effect to be: 1,2-ethenylidene carbonic ester, the 3-phenyl phosphate ester, 3-butyl phosphoric acid ester, three-2,2,2-three fluoro ethyl phosphates, two-2,2,2-three fluoro ethyl-methyl phosphates, 2,2,2-three fluoro ethyl-diethyl phosphate, the ethylene ethyl phosphate, two fluoro methyl acetates, methyl-2,2,2-three fluoro ethyl carbonate esters, ethyl-2,2,2-three fluoro ethyl carbonate esters, propyl group-2,2, one or more in the 2-three fluoro ethyl carbonate esters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910047490A CN101834317A (en) | 2009-03-13 | 2009-03-13 | Coiled lithium battery cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910047490A CN101834317A (en) | 2009-03-13 | 2009-03-13 | Coiled lithium battery cell |
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| CN101834317A true CN101834317A (en) | 2010-09-15 |
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| CN200910047490A Pending CN101834317A (en) | 2009-03-13 | 2009-03-13 | Coiled lithium battery cell |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425844A (en) * | 2013-09-09 | 2015-03-18 | 浙江万向亿能动力电池有限公司 | Method for improving safety of power battery by isolation type inflame-retardant liquid |
| CN104701578A (en) * | 2015-02-28 | 2015-06-10 | 合肥国轩高科动力能源股份公司 | Lithium battery roll treatment process with high security |
| CN106972194A (en) * | 2017-04-21 | 2017-07-21 | 天津力神电池股份有限公司 | A kind of lithium ion battery |
| CN108808074A (en) * | 2018-07-04 | 2018-11-13 | 樊朝晖 | A kind of half winds lamination lithium ion battery cell and preparation method thereof |
| JP2018206628A (en) * | 2017-06-06 | 2018-12-27 | トヨタ自動車株式会社 | Nonaqueous electrolyte secondary battery |
| CN109585724A (en) * | 2017-09-29 | 2019-04-05 | 郑州宇通客车股份有限公司 | Vehicle and its battery case, battery modules, battery, cell support core |
| CN112993289A (en) * | 2019-12-12 | 2021-06-18 | 中国科学院大连化学物理研究所 | Lithium/carbon fluoride battery, electrolyte thereof and use method thereof |
-
2009
- 2009-03-13 CN CN200910047490A patent/CN101834317A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425844A (en) * | 2013-09-09 | 2015-03-18 | 浙江万向亿能动力电池有限公司 | Method for improving safety of power battery by isolation type inflame-retardant liquid |
| CN104701578A (en) * | 2015-02-28 | 2015-06-10 | 合肥国轩高科动力能源股份公司 | Lithium battery roll treatment process with high security |
| CN104701578B (en) * | 2015-02-28 | 2017-04-19 | 合肥国轩高科动力能源有限公司 | High-safety lithium battery roll core processing technology |
| CN106972194A (en) * | 2017-04-21 | 2017-07-21 | 天津力神电池股份有限公司 | A kind of lithium ion battery |
| JP2018206628A (en) * | 2017-06-06 | 2018-12-27 | トヨタ自動車株式会社 | Nonaqueous electrolyte secondary battery |
| CN109585724A (en) * | 2017-09-29 | 2019-04-05 | 郑州宇通客车股份有限公司 | Vehicle and its battery case, battery modules, battery, cell support core |
| CN108808074A (en) * | 2018-07-04 | 2018-11-13 | 樊朝晖 | A kind of half winds lamination lithium ion battery cell and preparation method thereof |
| CN112993289A (en) * | 2019-12-12 | 2021-06-18 | 中国科学院大连化学物理研究所 | Lithium/carbon fluoride battery, electrolyte thereof and use method thereof |
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Open date: 20100915 |