CN202737039U - High heatproof lithium battery - Google Patents
High heatproof lithium battery Download PDFInfo
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- CN202737039U CN202737039U CN2012203920488U CN201220392048U CN202737039U CN 202737039 U CN202737039 U CN 202737039U CN 2012203920488 U CN2012203920488 U CN 2012203920488U CN 201220392048 U CN201220392048 U CN 201220392048U CN 202737039 U CN202737039 U CN 202737039U
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- current collector
- coated
- lithium battery
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- high temperature
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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
Abstract
The utility model discloses a high heatproof lithium battery. An existing lithium battery is bad in safety performance. The high heatproof lithium battery comprises an anode, a cathode, a partitioning membrane, electrolyte, a packaging membrane and a high-temperature rubber belt which is wrapped outside the packaging membrane. The anode comprises an anode current collector, anode coating paste which is coated on the anode current collector and an anode tab which is connected at one end of the anode current collector. The cathode comprises a cathode current collector, cathode coating paste which is coated on the cathode current collector and a cathode tab which is connected at one end of the cathode current collector. The anode and the cathode are overlaid together at intervals through the partitioning membrane and are wound to be a nude cell which is placed inside a containing cavity of the packaging membrane, and the electrolyte is injected into the containing cavity. The high-temperature rubber belt is stuck on the area where the anode coating paste is not coated on the anode current collector. Before semi-separated or fully-separated positive active materials are decomposed or react with the electrolyte, a short circuit caused by contacting of the anode current collector and the cathode current collector inside the battery is carried out first so that heat is released relatively slow, and accordingly the technical purpose that the battery can still be safe when being placed for a long time on the condition of the high temperature of 250 DEG C is achieved.
Description
Technical field
The utility model relates to lithium battery, specifically high heat-resisting lithium battery.
Background technology
Conventional batteries only needs to use in the environment below 60 ℃ and can satisfy primary demand, but when assembled battery in electronic equipment, sometimes can run into the high temperature impact in the short time.For the anti-fluid welding of normal employing of enhancing productivity connects, the method only needs the very short time during such as electronic equipment assembled battery, but the method can make the temperature of battery reach 200～260 ℃; In the process that and for example electronic equipment reclaims, battery separates with the mode of separating of electronic equipment of normal employing scolding tin melting, and the surface temperature of scolding tin dish is 250 ℃.Processed and applied for conventional batteries, need to consider its every security performance, not look at even the parent that violent Mars, the higher lithium battery of thermal safety on fire, explosion accident more and more is subject to high-end electronic devices manufacturer still can not occur under 250 ℃ heat dish.Some electronic equipment producer such as Nokia have made the hot security reliability test order for lithium battery, and namely 250 ℃ of heat dishes have another name called 250 ℃ of tappasakis.
The test of 250 ℃ of tappasakis is battery to be filled completely to be placed on a surface temperature be to roast on 250 ℃ the flat plate heat, require battery can not spray Mars, can not be on fire, can not explode.Generally speaking, the packaging film that plays the barrier film of insulating effect in the lithium battery and sealed environment is provided all can melt under 250 ℃ harsh high temperature and loses its function, and battery can short circuit and thermal runaway, and then causes serial security incident.
Exploitation for the high lithium battery of thermal safety, publication number is a solution that the Chinese utility model patent application of CN 101442141A has disclosed Lishen Battery Co., Ltd., Tianjin's exploitation, and it adopts the mode of adding fire retardant in electrolyte to improve its thermal safety.But, adding the effect of a small amount of flame-retardant additive and not obvious in the electrolyte, the lithium battery that is under the half electric 3.8V state such as example in the patent carries out the tappasaki test, and the test effect under the full power state is unsatisfactory.In electrolyte, add the purpose that a large amount of flame-retardant additives then can reach the raising thermal safety, but its electrical property is then doubly influenced, does not satisfy the base application demand.
The utility model content
The technical assignment of the technical problems to be solved in the utility model and proposition is to overcome the existing poor defective of lithium battery thermal safety, and a kind of high heat-resisting lithium battery is provided.
For achieving the above object, the heat-resisting lithium battery of height of the present utility model, comprise positive pole, negative pole, barrier film, electrolyte, packaging film and the high temperature gummed tape that is wrapped in the packaging film outside, positive pole comprises plus plate current-collecting body, the positive pole that is coated on the plus plate current-collecting body is coated with cream and the positive pole ear that is connected to plus plate current-collecting body one end, negative pole comprises negative current collector, the negative pole that is coated on the negative current collector is coated with cream and the negative lug that is connected to negative current collector one end, described positive pole, negative pole is stacked together by the barrier film interval and is wound into naked battery core, naked battery core places the container cavity of packaging film and is marked with electrolyte at described container cavity, it is characterized in that: uncoated positive pole is coated with the zone stickup high temperature gummed tape of cream on the described plus plate current-collecting body.
As the optimization technique means, uncoated negative pole is coated with the zone stickup high temperature gummed tape of cream on the described negative current collector.
As the optimization technique means, described high temperature gummed tape surpasses 250 ℃ material as base material and applies the high temperature gummed tape of adhesive at base material take melting temperature.
As the optimization technique means, described packaging film is the composite membrane that is composited by one deck PP film, one deck Al paper tinsel, one deck nylon membrane or high temperature membrane, and described Al paper tinsel is positioned at the centre of composite membrane.
As the optimization technique means, described positive pole is coated with cream and comprises positive active material, conductive carbon and PVDF, and described positive active material refers to a kind of in cobalt acid lithium, nickle cobalt lithium manganate, LiMn2O4, LiFePO4, the phosphoric acid vanadium lithium or more than one mixture.
As the optimization technique means, described negative pole is coated with cream and comprises negative electrode active material, conductive carbon, CMC and SBR, and described negative electrode active material refers to one or more the mixing in Delanium, native graphite, composite graphite, hard carbon, Graphene, the lithium titanate.Further, described negative pole is coated with cream and comprises PVDF.
As the optimization technique means, the single or multiple lift film of described barrier film for stretching and form by polyolefin.Further, described barrier film is monolayer polyethylene barrier film or single-layer polypropylene barrier film or the laminated diaphragm that is composited by monolayer polyethylene and single-layer polypropylene.Concrete, the number of plies of described laminated diaphragm is 2～3 layers.
As the optimization technique means, described electrolyte is take LiPF6 as lithium salts, one or more electrolyte as solvent in ethylene carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, propyl acetate, the ethyl propionate.Further, comprise functional additive in the described electrolyte.
As the optimization technique means, described high temperature membrane is polyimide film.
As the optimization technique means, described plus plate current-collecting body is that thickness is at the aluminium foil of 8um～50um; Described negative current collector is that thickness is at the Copper Foil of 5um～50um or the aluminium foil of 8 um～50um.
As the optimization technique means, the zone that uncoated positive pole is coated with cream on the described plus plate current-collecting body is positioned at the two ends of plus plate current-collecting body, and the uncoated negative zone that is coated with cream is positioned at the two ends of negative current collector on the described negative current collector.
The beneficial effects of the utility model are: do not protect with high temperature gummed tape being coated with the cream zone on plus plate current-collecting body, the negative current collector; like this; even battery works long hours under 250 ℃ of high temperature; its barrier film melts; battery is before full lithium intercalated graphite and electrolyte reaction; partly deviate from or entirely deviate from positive active material decomposes or react with electrolyte before can carry out first internal positive collector and negative current collector contact short circuit; and then relatively slowly release heat, thereby reach in 250 ℃ of lower long-time still technical purposes of safety of placing of high temperature.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model positive pole;
Fig. 2 is the schematic diagram of the high heat-resisting lithium battery of the utility model;
The number in the figure explanation:
The 1-plus plate current-collecting body, the 2-positive pole is coated with cream, 3-positive pole ear, 4-high temperature gummed tape.
Embodiment
Below in conjunction with Figure of description the utility model is described further.
The heat-resisting lithium battery of height of the present utility model, such as Fig. 1, shown in 2, it comprises positive pole, negative pole, barrier film, electrolyte, packaging film and the high temperature gummed tape that is wrapped in the packaging film outside, positive pole comprises plus plate current-collecting body, the positive pole that is coated on the plus plate current-collecting body is coated with cream and the positive pole ear that is connected to plus plate current-collecting body one end, negative pole comprises negative current collector, the negative pole that is coated on the negative current collector is coated with cream and the negative lug that is connected to negative current collector one end, anodal, negative pole is stacked together by the barrier film interval and is wound into naked battery core, naked battery core places the container cavity of packaging film and is marked with electrolyte at container cavity, high temperature gummed tape is pasted in the zone that uncoated positive pole is coated with cream on the plus plate current-collecting body, and the zone that uncoated negative pole is coated with cream on the negative current collector can optionally be pasted high temperature gummed tape or do not pasted high temperature gummed tape.The zone of pasting high temperature gummed tape comprises that also lug connects the position of (such as welding, riveted joint), covers simultaneously that to be coated with cream area 0 .2mm～5mm better.
As further improving and replenishing technique scheme, the utility model also comprises following additional technical characterictic, although Fig. 1, Fig. 2 have comprised following all additional technical features, it is preferred embodiment of the present utility model, but the utility model is not limited to this situation, according to specifically acting on they is selected on the described technical scheme of epimere when implementing the utility model.
At first, high temperature gummed tape take melting temperature surpass any macromolecule of 250 ℃ or on-macromolecular material (such as polyimides) as base material and base material apply adhesive (as silica gel, acrylic glue or any other glue of bonding effect is arranged) high temperature gummed tape.
Secondly, packaging film is the composite membrane that is composited by one deck PP film, one deck Al paper tinsel, one deck nylon membrane or high temperature membrane, and the Al paper tinsel is positioned at the centre of composite membrane.
The 3rd, positive pole is coated with cream and comprises positive active material, conductive carbon and PVDF, and positive active material refers to a kind of in cobalt acid lithium, nickle cobalt lithium manganate, LiMn2O4, LiFePO4, the phosphoric acid vanadium lithium or more than one mixture.
The 4th, negative pole is coated with cream and comprises negative electrode active material, conductive carbon, CMC and SBR, and negative electrode active material refers to one or more the mixing in Delanium, native graphite, composite graphite, hard carbon, Graphene, the lithium titanate.Further, negative pole is coated with cream and comprises PVDF.
The 5th, the single or multiple lift film of barrier film for stretching and form through dry method or wet method by polyolefin.Further, barrier film is monolayer polyethylene barrier film or single-layer polypropylene barrier film or the laminated diaphragm that is composited by monolayer polyethylene and single-layer polypropylene.Concrete, the number of plies of laminated diaphragm is 2～3 layers.
The 6th, electrolyte is take LiPF6 as lithium salts, one or more electrolyte as solvent in ethylene carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, propyl acetate, the ethyl propionate.Further, comprise functional additive in the electrolyte.
The 7th, high temperature membrane is polyimide film.
The 8th, plus plate current-collecting body is that thickness is at the aluminium foil of 8um～50um; Negative current collector is that thickness is at the Copper Foil of 5um～50um or the aluminium foil of 8 um～50um.
The 9th, the zone that uncoated positive pole is coated with cream on the plus plate current-collecting body is positioned at the two ends of plus plate current-collecting body, and the uncoated negative zone that is coated with cream is positioned at the two ends of negative current collector on the negative current collector.
Take flexible-packaged lithium secondary cell as example, with reference to anode structure figure shown in Figure 1 embodiment of the present utility model is described.
The making step of flexible-packaged lithium secondary cell is as follows:
Anodal preparation: in positive electrode active materials such as cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate, LiFePO4, the phosphoric acid vanadium lithium one or more are proportionally mixed to be dissolved in the n-formyl sarcolysine base pyrrolidone solution forming slurry with conductive carbon, polyvinylidene fluoride, and this slurry is coated on the Al plus plate current-collecting body processed according to certain specification, roll-in is to required thickness and soldering polar ear, pastes high temperature gummed tape in the zone that uncoated positive pole is coated with cream at last and forms positive pole.
The preparation of negative pole: in negative active core-shell material such as native graphite, Delanium, composite graphite, hard carbon, the lithium titanate one or more proportionally are dissolved in the water with CMC, be mixed into slurry with the SBR bonding agent again, be coated on Cu or the Al negative current collector processed according to certain specification, roll-in forms negative plate to required thickness and soldering polar ear (zone that uncoated negative pole is coated with cream on the negative current collector can optionally be pasted high temperature gummed tape or do not pasted high temperature gummed tape).
Positive and negative electrode and barrier film interval are placed, and reeling forms naked battery core, and naked battery core is placed according to the packaging film of the made container cavity of certain size, is assembled into qualified battery through series of processes such as fluid injection, encapsulation.
Below introduce embodiment and Comparative Examples.
Embodiment 1: paste take polyimides as base material at anodal blank collector place, the high temperature silicon adhesive tape take organic silica gel as adhesive, and the blank collector of negative pole place does not tape, according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 2: paste take polyimides as base material at anodal blank collector place, the high temperature acrylic adhesive tape take acrylic glue as adhesive, and the blank collector of negative pole place does not tape, according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 3: paste take polyimides as base material at anodal blank collector place, high temperature silicon adhesive tape take organic silica gel as adhesive, paste take polyimides as base material at the blank collector of negative pole place, high temperature silicon adhesive tape take organic silica gel as adhesive is according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 4: paste take polyimides as base material at anodal blank collector place, high temperature acrylic adhesive tape take acrylic glue as adhesive, paste take polyimides as base material at the blank collector of negative pole place, high temperature acrylic adhesive tape take acrylic glue as adhesive is according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 5: paste take polyimides as base material at anodal blank collector place, high temperature silicon adhesive tape take organic silica gel as adhesive, paste take polyimides as base material at the blank collector of negative pole place, high temperature acrylic adhesive tape take acrylic glue as adhesive is according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 6: paste take polyimides as base material at anodal blank collector place, high temperature acrylic adhesive tape take acrylic glue as adhesive, paste take polyimides as base material at the blank collector of negative pole place, high temperature silicon adhesive tape take organic silica gel as adhesive is according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 7: paste take polytetrafluoroethylene as base material at anodal blank collector place, Teflon adhesive tape take organic silica gel as adhesive, paste take polytetrafluoroethylene as base material at the blank collector of negative pole place, Teflon adhesive tape take organic silica gel as adhesive is according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 8: paste take glass cloth as base material at anodal blank collector place, glass cloth adhesive tape take organic silica gel as adhesive, paste take glass cloth as base material at the blank collector of negative pole place, glass cloth adhesive tape take organic silica gel as adhesive is according to the battery that is assembled into the 561422-120mAh model shown in the embodiment.
Embodiment 9: paste take polyimides as base material at anodal blank collector place, high temperature acrylic adhesive tape take acrylic glue as adhesive, paste take polyimides as base material at the blank collector of negative pole place, high temperature acrylic adhesive tape take acrylic glue as adhesive is according to the battery that is assembled into the 312040-190mAh model shown in the embodiment.
Embodiment 10: paste take polyimides as base material at anodal blank collector place, high temperature acrylic adhesive tape take acrylic glue as adhesive, paste take polyimides as base material at the blank collector of negative pole place, high temperature acrylic adhesive tape take acrylic glue as adhesive is according to the battery that is assembled into the 672029-340mAh model shown in the embodiment.
Embodiment 11: paste take polyimides as base material at anodal blank collector place, high temperature acrylic adhesive tape take acrylic glue as adhesive, paste take polyimides as base material at the blank collector of negative pole place, high temperature acrylic adhesive tape take acrylic glue as adhesive is according to the battery that is assembled into the 652531-450mAh model shown in the embodiment.
Comparative Examples 1: anodal blank collector place does not tape, and the blank collector of negative pole place does not tape, and is assembled into the battery of 561422-120mAh model by the normal battery assemble flow.
Comparative Examples 2: anodal blank collector place does not tape, and the blank collector of negative pole place does not tape, and is assembled into the battery of 312040-190mAh model by the normal battery assemble flow.
Comparative Examples 3: anodal blank collector place does not tape, and the blank collector of negative pole place does not tape, and is assembled into the battery of 672029-340mAh model by the normal battery assemble flow.
Comparative Examples 4: anodal blank collector place does not tape, and the blank collector of negative pole place does not tape, and is assembled into the battery of 652531-450mAh model by the normal battery assemble flow.
In order to investigate the hot security feature of the utility model battery, having designed one group verifies, experimentation is as follows: battery is charged to full voltage with the multiplying power of 0.5C, constant voltage is 0.02C to electric current under full voltage, leaving standstill 1h, to be placed on surface temperature be on 250 ℃ the flat plate heat, observe battery status, battery does not emit Mars, does not play naked light, does not explode.
Experimental result such as table 1.
Can find out from table 1 experimental result, the battery of embodiment 1～9 after this experiment, all do not emit Mars, not on fire, do not explode, and Comparative Examples 1 and Comparative Examples 2 all have the Mars of emitting, Comparative Examples 2 is on fire in addition; Embodiment 10～11 is all not on fire, emits on a small quantity Mars but have, and Comparative Examples 3～4 is then all emitted Mars, and is most of on fire.It can be said that brightly, after anode pole piece is processed through high temperature gummed tape, can greatly promote the hot security feature of battery.
Table 1:
Claims (10)
1. high heat-resisting lithium battery, comprise positive pole, negative pole, barrier film, electrolyte, packaging film and the high temperature gummed tape that is wrapped in the packaging film outside, positive pole comprises plus plate current-collecting body, the positive pole that is coated on the plus plate current-collecting body is coated with cream and the positive pole ear that is connected to plus plate current-collecting body one end, negative pole comprises negative current collector, the negative pole that is coated on the negative current collector is coated with cream and the negative lug that is connected to negative current collector one end, described positive pole, negative pole is stacked together by the barrier film interval and is wound into naked battery core, naked battery core places the container cavity of packaging film and is marked with electrolyte at described container cavity, it is characterized in that: uncoated positive pole is coated with the zone stickup high temperature gummed tape of cream on the described plus plate current-collecting body.
2. the heat-resisting lithium battery of height according to claim 1 is characterized in that: high temperature gummed tape is pasted in the zone that uncoated negative pole is coated with cream on the described negative current collector.
3. the heat-resisting lithium battery of height according to claim 1 and 2 is characterized in that: described high temperature gummed tape surpasses 250 ℃ material as base material and applies the high temperature gummed tape of adhesive at base material take melting temperature.
4. the heat-resisting lithium battery of height according to claim 1, it is characterized in that: described packaging film is the composite membrane that is composited by one deck PP film, one deck Al paper tinsel, one deck nylon membrane or high temperature membrane, and described Al paper tinsel is positioned at the centre of composite membrane.
5. the heat-resisting lithium battery of height according to claim 1 is characterized in that: the single or multiple lift film of described barrier film for being stretched and formed by polyolefin.
6. the heat-resisting lithium battery of height according to claim 5 is characterized in that: described barrier film is monolayer polyethylene barrier film or single-layer polypropylene barrier film or the laminated diaphragm that is composited by monolayer polyethylene and single-layer polypropylene.
7. the heat-resisting lithium battery of height according to claim 6, it is characterized in that: the number of plies of described laminated diaphragm is 2～3 layers.
8. the heat-resisting lithium battery of height according to claim 1, it is characterized in that: described high temperature membrane is polyimide film.
9. the heat-resisting lithium battery of height according to claim 1, it is characterized in that: described plus plate current-collecting body is that thickness is at the aluminium foil of 8um～50um; Described negative current collector is that thickness is at the Copper Foil of 5um～50um or the aluminium foil of 8 um～50um.
10. the heat-resisting lithium battery of height according to claim 1 is characterized in that: the zone that uncoated positive pole is coated with cream on the described plus plate current-collecting body is positioned at the two ends of plus plate current-collecting body, and the uncoated negative zone that is coated with cream is positioned at the two ends of negative current collector on the described negative current collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203920488U CN202737039U (en) | 2012-08-09 | 2012-08-09 | High heatproof lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203920488U CN202737039U (en) | 2012-08-09 | 2012-08-09 | High heatproof lithium battery |
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| CN202737039U true CN202737039U (en) | 2013-02-13 |
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| CN2012203920488U Expired - Lifetime CN202737039U (en) | 2012-08-09 | 2012-08-09 | High heatproof lithium battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268957A (en) * | 2013-05-14 | 2013-08-28 | 曙鹏科技（深圳）有限公司 | Flexible packaging lithium-ion battery |
| CN103593336A (en) * | 2013-10-30 | 2014-02-19 | 中国运载火箭技术研究院 | Knowledge pushing system and method based on semantic analysis |
| CN110429343A (en) * | 2019-05-06 | 2019-11-08 | 江西星盈科技有限公司 | Lithium ion battery and its preparation process |
-
2012
- 2012-08-09 CN CN2012203920488U patent/CN202737039U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268957A (en) * | 2013-05-14 | 2013-08-28 | 曙鹏科技（深圳）有限公司 | Flexible packaging lithium-ion battery |
| CN103268957B (en) * | 2013-05-14 | 2015-10-07 | 曙鹏科技（深圳）有限公司 | Flexible packing lithium ion battery |
| CN103593336A (en) * | 2013-10-30 | 2014-02-19 | 中国运载火箭技术研究院 | Knowledge pushing system and method based on semantic analysis |
| CN110429343A (en) * | 2019-05-06 | 2019-11-08 | 江西星盈科技有限公司 | Lithium ion battery and its preparation process |
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Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |