CN105895965A - Fabrication method of ultra-thin lithium battery - Google Patents
Fabrication method of ultra-thin lithium battery Download PDFInfo
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- CN105895965A CN105895965A CN201510457094.XA CN201510457094A CN105895965A CN 105895965 A CN105895965 A CN 105895965A CN 201510457094 A CN201510457094 A CN 201510457094A CN 105895965 A CN105895965 A CN 105895965A
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- ultra
- thin lithium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
-
- 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
Abstract
The invention belongs to the technical field of a lithium battery, and discloses a fabrication method of an ultra-thin lithium battery. The ultra-thin lithium battery is finally fabricated by laminating a conductive material and an active substance on a composite PP (polypropylene) film and sealing by heat sealing. Compared with an existing lithium battery, the lithium battery disclosed by the invention is thinner and can be applied to demands of thinner and thinner electronic products; moreover, the ultra-thin lithium battery can be freely bent and can be applied to a current popular intelligent wearable device; and with the adoption of the ultra-thin lithium battery, products with different shapes such as square, round, oval or other irregular shapes can be fabricated according to demands.
Description
Technical field
The invention belongs to technical field of lithium batteries, be specifically related to a kind of ultra-thin lithium cell manufacture method.
Background technology
Lithium battery has the advantages such as capacity is high, volume is little, lightweight, extensively applies in a lot of industries.But, along with the development of science and technology, a lot of electronic products are towards the scraps of paper, ultrathin development, but lithium battery is the thinnest can only accomplish 0.6mm, considerably beyond the thickness of printing paper.Meanwhile, various Intelligent worn device have begun to popular, and traditional lithium battery is also not enough to adapt to the free bend of these equipment.
Summary of the invention
The problem existed for background technology, it is an object of the invention to provide a kind of thickness less than 0.08mm(printing paper thickness is 0.1mm) ultra-thin lithium cell and manufacture method, it can be used for multiple ultrathin electronic equipment, simultaneously can free bend.
For reaching above-mentioned purpose, the ultra-thin lithium cell manufacture method of present invention design, comprise the following steps:
One) positive and negative plate is prepared
A, prepare positive plate
1) use the tape casting or dry method by area less than compound PP(polypropylene) aluminium foil of film is compounded on compound PP film, and leave the seal location of certain distance between the outline and the outline of described compound PP film of described aluminium foil, and the pre-seal location of certain distance is left in the outside of one section of seal location wherein；
2) it is coated with positive active material on the surface of aluminium foil, and is left white in aluminium foil surface appropriate location；
3) vacuum drying removes fugitive constituent；
4) weld positive pole ear at blank space, and clad welded position forms positive plate；
B, prepare negative plate
1) use the tape casting or dry method by area less than compound PP(polypropylene) Copper Foil of film is compounded on compound PP film, and leave the seal location of certain distance between the outline and the outline of described compound PP film of described Copper Foil, and the pre-seal location of certain distance is left in the outside of one section of seal location wherein；
2) it is coated with negative electrode active material on the surface of Copper Foil, and is left white in copper foil surface appropriate location；
3) vacuum drying removes fugitive constituent；
4) weld negative lug at blank space, and clad welded position forms negative plate；
Two) between positive and negative plate, put into barrier film, utilize heat sealing machine the positive plate of order stacking, barrier film and negative plate to be encapsulated part seal location under certain package temperature and encapsulation pressure；
Three) inject a certain amount of electrolyte from pre-seal location, under certain package temperature and encapsulation pressure, encapsulate pre-seal location, be charged chemical conversion according to design capacity；
Four) utilize vacuum sealer to carry out evacuation encapsulation step two under certain package temperature, encapsulation pressure and vacuum values) in unencapsulated part seal location.
Preferably, described step one) in the distance as seal location be 4mm～6mm.
Preferably, described step 2) in barrier film be polyalkene diaphragm.
Preferably, described step 2) in package temperature be 170 DEG C～210 DEG C.
Preferably, described step 2) in encapsulation pressure be 0.3MPa～0.6MPa.
Preferably, described step 3) in package temperature be 170 DEG C～210 DEG C.
Preferably, described step 3) in encapsulation pressure be 0.3MPa～0.6MPa.
Preferably, described step 4) in package temperature be 170 DEG C～210 DEG C.
Preferably, described step 4) in encapsulation pressure be 0.3MPa～0.6MPa.
Preferably, described step 4) in vacuum values be-0.08MPa～-0.1MPa.
The invention has the beneficial effects as follows: compare existing lithium battery, the lithium battery of the present invention is thinner, it is possible to adapt to tend to the thinnest electronic product demand, and the present invention can free bend, it is possible to adapt to the Intelligent worn device of current popular；And utilize the present invention can prepare the most square, circular, oval or other difform products such as special-shaped as required.
Accompanying drawing explanation
Fig. 1 is the structural representation of ultra-thin lithium cell of the present invention.
Fig. 2 is the encapsulating structure schematic diagram of the present invention.
Detailed description of the invention
Below by Fig. 1～Fig. 2 and the mode of some alternative embodiments enumerating the present invention; being described in further detail technical scheme (including optimal technical scheme), any technical characteristic and any technical scheme in the present embodiment are all not intended to protection scope of the present invention.
Below by Fig. 1 and Fig. 2 and the mode of some alternative embodiments enumerating the present invention; being described in further detail technical scheme (including optimal technical scheme), once any technical characteristic in embodiment and any technical scheme are all not intended to protection scope of the present invention.
As depicted in figs. 1 and 2, the ultra-thin lithium cell manufacture method of present invention design, comprise the following steps:
One) positive and negative plate is prepared
A, prepare positive plate
1) the compound PP film 1 that thickness is 15 μm is cut into the rectangle of 52mm*120mm, the aluminium foil 2 of 8 μ m-thick is cut into the rectangle of 44mm*72mm；Use the tape casting or dry method to be combined with described compound PP film 1 by the outline of described aluminium foil, and respectively reserve the first wide for 4mm seal location 101 on aluminium foil 2 three limits therein, and remaining corresponding compound PP film limit is also reserved the wide pre-seal location 103 of 4mm；Then the compound PP film posting aluminium foil is put into vacuum drying oven evacuation to be dried；
2) surface at dried aluminium foil 2 is coated with the positive active material 3 of 5 μ m-thick, and is not coated with being left white by angle surface 3mm*5mm on aluminium foil 2 side, uses for next step welding positive pole ear 4；
3) being placed again in vacuum drying oven, evacuation is dried the solvent removed in positive active material；
4) weld positive pole ear 4 at blank space, and clad welded position forms positive plate；
B, prepare negative plate
1) the compound PP film 1 that thickness is 15 μm is cut into the rectangle of 52mm*120mm, the Copper Foil 5 of 8 μ m-thick is cut into the rectangle of 44mm*72mm；Use the tape casting or dry method to be combined with described compound PP film 1 by the outline of described Copper Foil, and respectively reserve the first wide for 4mm seal location 101 on Copper Foil 5 three limits therein, and remaining corresponding compound PP film limit is also reserved the wide pre-seal location 103 of 4mm；Then the compound PP film posting Copper Foil is put into vacuum drying oven evacuation to be dried；
2) surface at dried Copper Foil 5 is coated with the negative electrode active material 6 of 5 μ m-thick, and is not coated with being left white by angle surface 3mm*5mm on Copper Foil 2 side, uses for next step welding negative lug 7；
3) being placed again in vacuum drying oven, evacuation is dried the solvent removed in negative electrode active material；
4) weld negative lug 7 at blank space, and clad welded position forms negative plate；
Two) between positive and negative plate, put into barrier film 8,170 DEG C～210 DEG C, the first seal location 101 utilizes under 0.3MPa～0.6MPa heat sealing machine the positive plate of order stacking, barrier film 8 and negative plate are encapsulated；
Three) vacuum drying, injects the electrolyte of 0.2g from pre-seal location 103, one 170 DEG C～210 DEG C, encapsulate pre-seal location 103 under 0.3MPa～0.6MPa, use constant-current constant-voltage charging mode that battery is charged chemical conversion, electric current is 0.2mA, and voltage is 3.95V, and the restriction time is 12 hours；
Four) 170 DEG C～210 DEG C, encapsulation pressure 0.3MPa～0.6MPa, vacuum values-0.08MPa～-0.1MPa under utilize vacuum sealer carry out evacuation and encapsulate the second seal location 102.
It is convenient that first seal location 101 and the second seal location 102 are intended merely to describe, the most specific implication, and they are all seal locations, and the width of seal location is 4mm～6mm after making battery.
As it is shown in figure 1, the ultra-thin lithium cell of present invention design, it is combined PP film 1 including the two-layer being packaged together, is combined between PP film 1 in two-layer and is provided with barrier film 8；Wherein stacking gradually aluminium foil 2 and positive active material 3 between one layer of compound PP film 1 to barrier film 8, another layer is combined between PP film 1 to barrier film 8 and stacks gradually Copper Foil 5 and negative electrode active material 6；Positive pole ear weldering 4 is connected on aluminium foil 2 and stretches out compound PP film 1, and negative lug 7 is welded on Copper Foil 5 and stretches out compound PP film 1.
Preferably, the thickness of described compound PP film 1 is 10 μm～20 μm.
Preferably, the thickness of described aluminium foil 2 is 6 μm～12 μm.
Preferably, the thickness of described positive active material 3 is 2 μm～10 μm.
Preferably, the thickness of described Copper Foil 5 is 4 μm～8 μm.
Preferably, the thickness of described negative electrode active material 6 is 2 μm～10 μm.
Preferably, the thickness of described barrier film 8 is 6 μm～12 μm.
It is further preferred that described barrier film is polyalkene diaphragm.
Preferably, the thickness of described positive pole ear 4 is 10 μm～20 μm.
Preferably, the thickness of described negative lug 7 is 10 μm～20 μm.
Claims (10)
1. a ultra-thin lithium cell manufacture method, comprises the following steps:
One) positive and negative plate is prepared
A, prepare positive plate
1) use the tape casting or dry method by area less than compound PP(polypropylene) aluminium foil of film is compounded on compound PP film, and leave the seal location of certain distance between the outline and the outline of described compound PP film of described aluminium foil, and the pre-seal location of certain distance is left in the outside of one section of seal location wherein；
2) it is coated with positive active material on the surface of aluminium foil, and is left white in aluminium foil surface appropriate location；
3) vacuum drying removes fugitive constituent；
4) weld positive pole ear at blank space, and clad welded position forms positive plate；
B, prepare negative plate
1) use the tape casting or dry method by area less than compound PP(polypropylene) Copper Foil of film is compounded on compound PP film, and leave the seal location of certain distance between the outline and the outline of described compound PP film of described Copper Foil, and the pre-seal location of certain distance is left in the outside of one section of seal location wherein；
2) it is coated with negative electrode active material on the surface of Copper Foil, and is left white in copper foil surface appropriate location；
3) vacuum drying removes fugitive constituent；
4) weld negative lug at blank space, and clad welded position forms negative plate；
Two) between positive and negative plate, put into barrier film, utilize heat sealing machine the positive plate of order stacking, barrier film and negative plate to be encapsulated part seal location under certain package temperature and encapsulation pressure；
Three) inject a certain amount of electrolyte from pre-seal location, under certain package temperature and encapsulation pressure, encapsulate pre-seal location, be charged chemical conversion according to design capacity；
Four) utilize vacuum sealer to carry out evacuation encapsulation step two under certain package temperature, encapsulation pressure and vacuum values) in unencapsulated part seal location.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step one) in the distance as seal location be 4mm～6mm.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 2) in barrier film be polyalkene diaphragm.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 2) in package temperature be 170 DEG C～210 DEG C.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 2) in encapsulation pressure be 0.3MPa～0.6MPa.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 3) in package temperature be 170 DEG C～210 DEG C.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 3) in encapsulation pressure be 0.3MPa～0.6MPa.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 4) in package temperature be 170 DEG C～210 DEG C.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 4) in encapsulation pressure be 0.3MPa～0.6MPa.
Ultra-thin lithium cell manufacture method the most according to claim 1 is characterized in that: described step 4) in vacuum values be-0.08MPa～-0.1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457094.XA CN105895965A (en) | 2015-07-30 | 2015-07-30 | Fabrication method of ultra-thin lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457094.XA CN105895965A (en) | 2015-07-30 | 2015-07-30 | Fabrication method of ultra-thin lithium battery |
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| CN105895965A true CN105895965A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510457094.XA Pending CN105895965A (en) | 2015-07-30 | 2015-07-30 | Fabrication method of ultra-thin lithium battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987620A (en) * | 2018-08-07 | 2018-12-11 | 广州小鹏汽车科技有限公司 | A kind of battery and battery modules |
| CN110085916A (en) * | 2019-03-26 | 2019-08-02 | 合肥国轩高科动力能源有限公司 | A kind of flexible lithium ion battery and preparation method thereof for wearable device |
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| CN101409369A (en) * | 2008-11-14 | 2009-04-15 | 东莞市迈科科技有限公司 | Large-capacity high power polymer ferric lithium phosphate power cell and preparation method thereof |
| CN202050017U (en) * | 2010-12-31 | 2011-11-23 | 力佳电源科技(深圳)有限公司 | Flexible package thin and ultra-thin lithium ion battery |
| CN102623667A (en) * | 2011-01-28 | 2012-08-01 | 力佳电源科技(深圳)有限公司 | Soft package thin and ultrathin cell structure and manufacturing method thereof |
| CN104681858A (en) * | 2015-01-30 | 2015-06-03 | 中南大学 | Ultrathin flexible lithium ion battery and preparation method thereof |
-
2015
- 2015-07-30 CN CN201510457094.XA patent/CN105895965A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409369A (en) * | 2008-11-14 | 2009-04-15 | 东莞市迈科科技有限公司 | Large-capacity high power polymer ferric lithium phosphate power cell and preparation method thereof |
| CN202050017U (en) * | 2010-12-31 | 2011-11-23 | 力佳电源科技(深圳)有限公司 | Flexible package thin and ultra-thin lithium ion battery |
| CN102623667A (en) * | 2011-01-28 | 2012-08-01 | 力佳电源科技(深圳)有限公司 | Soft package thin and ultrathin cell structure and manufacturing method thereof |
| CN104681858A (en) * | 2015-01-30 | 2015-06-03 | 中南大学 | Ultrathin flexible lithium ion battery and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987620A (en) * | 2018-08-07 | 2018-12-11 | 广州小鹏汽车科技有限公司 | A kind of battery and battery modules |
| CN110085916A (en) * | 2019-03-26 | 2019-08-02 | 合肥国轩高科动力能源有限公司 | A kind of flexible lithium ion battery and preparation method thereof for wearable device |
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Application publication date: 20160824 |