CN102315421A - Ultrathin polymer lithium ion battery and preparation method thereof - Google Patents
Ultrathin polymer lithium ion battery and preparation method thereof Download PDFInfo
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- CN102315421A CN102315421A CN201110252610A CN201110252610A CN102315421A CN 102315421 A CN102315421 A CN 102315421A CN 201110252610 A CN201110252610 A CN 201110252610A CN 201110252610 A CN201110252610 A CN 201110252610A CN 102315421 A CN102315421 A CN 102315421A
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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 provides an ultrathin polymer lithium ion battery. The ultrathin polymer lithium ion battery comprises an electrical core, an anode plate coating and a cathode plate coating which are arranged in the electrical core are respectively provided with an anode material layer and a cathode material layer, and surfaces of the anode material layer and the cathode material layer are respectively coated with a layer of a polymer film; and polar extracting belts of the anode and the cathode which are respectively arranged at one end of the anode plate coating and the cathode plate coating are connected with the anode plate coating and the cathode plate coating, and a layer of an isolation film is arranged between the anode plate coating and the cathode plate coating. The ultrathin polymer lithium ion battery disclosed in the invention has the advantages of small volume, reasonable structure of the design of the anode plate coating and the cathode plate coating, and improvement of the cycle performance and the stability of the battery, the electrical core has a good liquid leakage-proof effect because of a thin packaging film and a seal belt, and simultaneously the battery can be directly communicated with an electronic product without welding a tin component by adopting the integrated design of the anode plate coating and the polar extracting belt of the anode, and the cathode plate coating and the polar extracting belt of the cathode.
Description
Technical field
The present invention relates to the battery technology field, specifically a kind of ultrathin polymer Li-ion battery and preparation method thereof.
Background technology
Along with the slimming design of electronic product, therefore the build for electronics unit accessory requires more and more to pay attention to its microminiaturization, in electronic product; Generally be designed with power supply, like notebook computer, mobile phone etc., its power supply is chargeable lithium ion electronics; Based on lithium ion battery, its steel aluminum hull shell has characteristics such as hardness is strong, the distortion difficulty is big, therefore in existing polymer Li-ion battery; Thickness less than the shell of the microminiature capacity section lithium ion battery of 1.0mm in forming process; The difficulty of its manufacturing process is very big, and also there is deficiency in the performance of battery, and there is limitation in the development of ultrathin lithium ion battery.
Summary of the invention
To the deficiency and the defective of above prior art, the object of the present invention is to provide a kind of ultrathin polymer Li-ion battery.
The objective of the invention is through adopting following technical scheme to realize:
A kind of ultrathin polymer Li-ion battery comprises electric core, and said electric in-core is provided with positive and negative plate and films, and is respectively arranged with the positive and negative electrode material layer on this positive and negative plate is filmed, and the surface of this positive and negative electrode material layer is coated with the one layer of polymeric film respectively; Anodal, negative pole polarity is drawn band and is separately positioned on the end that this positive and negative plate is filmed, and filming with this positive and negative plate connects as one, and is provided with one deck barrier film between this positive and negative plate is filmed.
As optimal technical scheme of the present invention, the thickness of said polymer film is 1～3um.
As optimal technical scheme of the present invention, said polymer film is pvdf membrane, PAAS film, PMMA film, PVP film, PVDF-HFP film or PEO film.
As optimal technical scheme of the present invention, said barrier film comprises one deck PP or PE film, and the two sides of this PP or PE film are coated with the one layer of polymeric film respectively.
As optimal technical scheme of the present invention, the thickness of said polymer film is 1～3um.
As optimal technical scheme of the present invention, said polymer film is pvdf membrane, PAAS film, PMMA film, PVP film, PVDF-HFP film or PEO film.
As optimal technical scheme of the present invention; Film positive pole, the negative pole polarity of an end of said positive and negative plate is drawn the band place and is provided with CPP or PP band; And, this positive and negative plate is provided with the packaging film of one deck environmental sealing on filming; This packaging film draws band with anodal, negative pole polarity and the band heat-sealing is one, and its thickness is less than 0.4mm.
The present invention also provides a kind of method for preparing above-mentioned ultrathin polymer Li-ion battery, may further comprise the steps:
A, positive pole, negative material are mixed into paste, are coated in respectively on positive and negative plate films, on this positive and negative plate is filmed, form a positive pole, negative electrode material layer respectively, and should positive pole, negative electrode material layer oven dry, roll, make its curing;
B, this positive and negative plate filmed carry out die-cutly, wherein, the end that this positive and negative plate is filmed is respectively equipped with positive pole, negative pole polarity is drawn band;
C, apply the one layer of polymeric material respectively, form a polymer film on the surface of this positive pole, negative electrode material layer;
D, between positive and negative plate is filmed, be provided with one deck barrier film, this barrier film comprises one deck PP or PE film, and the two sides of this PP or PE film are coated with the one layer of polymeric film respectively;
E, with positive and negative plate film, the superimposed hot pressing of barrier film three is one, its hot pressing temperature is 55～80 ℃.
As optimal technical scheme of the present invention, said c step and the described polymer film of d step are PVDF, PAAS, PMMA, PVP, PVDF-HFP or PEO material, and the percentage of its copolymer content is 1～8%, and this polymer film thickness is 1～3um.
As optimal technical scheme of the present invention; Also comprise a step after the said e step; Remove positive and negative plate and film and greasy dirt, dirt anodal, that negative pole polarity is drawn belt surface, draw the band place CPP or PP band are set, and on this positive and negative plate is filmed, the packaging film of one deck environmental sealing is set in anodal, negative pole polarity; And packaging film and anodal, negative pole polarity drawn band and the band heat-sealing is one, its thickness is less than 0.4mm.
Compared with prior art, the ultrathin polymer Li-ion battery that the present invention disclosed has littler volume, and the project organization that positive and negative plate is filmed is more reasonable; The cycle performance and stability of battery have been improved; Through slim packaging film and band, make electric core have good anti-liquid and leak effect, simultaneously; The employing positive and negative plate is filmed and anodal, negative pole polarity are drawn and is with incorporate design; Battery can directly be communicated with electronic product, not need to weld the tin element again, have stronger practicality.
Description of drawings
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further:
Fig. 1 is the front schematic view of the electric core of a kind of ultrathin polymer Li-ion battery of the present invention.
Fig. 2 is the exploded view of the electric core of a kind of ultrathin polymer Li-ion battery of the present invention.
Fig. 3 is the whole front schematic view of a kind of ultrathin polymer Li-ion battery of the present invention.
Fig. 4 is the side diagrammatic sketch of a kind of ultrathin polymer Li-ion battery of the present invention.
Fig. 5 is the exploded view of a kind of ultrathin polymer Li-ion battery of the present invention.
Embodiment
See also Fig. 1 and Fig. 2, be respectively front schematic view and the exploded view of electric core of the electric core of a kind of ultrathin polymer Li-ion battery of the present invention.
Anodal polarity is drawn with 107 and is drawn with 108 be separately positioned on that this positive plate films 102, negative plate is filmed 103 ends with negative pole polarity, and filming with this positive and negative plate 102,103 connects as one.Positive plate film 102 and negative plate film and also be provided with one deck barrier film 20 between 103, this barrier film 20 comprises one deck PP or PE film 109, the two sides of this PP or PE film 109 are coated with one layer of polymeric film 110 respectively.
In the present embodiment; Above-mentioned positive electrode material layer 104 can adopt PVDF (Kynoar) film, PAAS (Sodium Polyacrylate) film, PMMA (polymethyl methacrylate) film, PVP (polyvinylpyrrolidone) film, PVDF-HFP (Kynoar-hexafluoropropylene) film or PEO (polyethylene glycol oxide) film with the polymer film 110 of the two sides coating of the negative electrode material layer 105 surperficial polymer films 106 that are provided with and PP or PE film 109, and the thickness of this polymer film 106,110 is comparatively preferred scheme between 1～3um.
See also Fig. 3, Fig. 4, Fig. 5, be respectively whole front schematic view, end view and the exploded view of a kind of ultrathin polymer Li-ion battery of the present invention.
This positive plate is filmed and 102 is drawn and be with 107,108 places to be provided with CPP or PP band 111 with film positive pole, the negative pole polarity of 103 1 ends of negative plate; And film at this positive plate and 102 to film with negative plate and to be provided with the slim packaging film 112 of one deck environmental sealing on 103 the outer surface; This packaging film 112 and anodal, negative pole polarity draw be with 107,108 and band 111 heat-sealings be one; After the heat-sealing; Packaging film 112, anodal polarity draw be with 107 or negative pole polarity draw be with 108, band 111, three's thickness sum is less than 0.4mm.
A kind of method for preparing above-mentioned ultrathin polymer Li-ion battery may further comprise the steps:
Step 1: positive pole, negative material are mixed into paste; Being coated in positive plate respectively films and 102 films on 103 with negative plate; Film at this positive plate and 102 to film with negative plate and to form a positive electrode material layer 104 and a negative electrode material layer 105 respectively on 103; And should positive pole, negative electrode material layer 104,105 oven dry, roll, make its curing.
Step 2: to this positive plate film 102 with negative plate film 103 carry out die-cut; With positive plate film 102 with negative plate film 103 be cut into different model and specification electrode plates; Wherein, This positive plate is filmed and 102 is respectively equipped with anodal polarity and draws and be with 107 to draw with negative pole polarity and to be with 108 with a film end of 103 of negative plate, and this positive pole, negative pole polarity are drawn and is with 107,108 to film with anodal, negative plate respectively and 102,103 connect as one.
Step 3: the surface at this positive electrode material layer 104 and negative electrode material layer 105 applies the one layer of polymeric material respectively, forms a polymer film 106.
Step 4: positive plate film 102 and negative plate film and be provided with one deck barrier film 20 between 103, this barrier film 20 comprises one deck PP or PE film 109, the two sides of this PP or PE film 109 are coated with one layer of polymeric film 110 respectively.
Step 5: positive plate filmed 102 film 103,20 threes are superimposed for barrier film, under 55～80 ℃ temperature, become electric core main body through hot pressing compound suppressing up and down with negative plate.
Step 6: remove positive and negative plate and film and 102,103 draw with 107,108 surperficial greasy dirt, dirts with anodal, negative pole polarity; Draw and be with 107,108 places that CPP or PP band 111 are set in anodal, negative pole polarity; And film at this positive plate and 102 to film with negative plate and to be provided with the slim packaging film 112 of one deck environmental sealing on 103 the outer surface; This packaging film 112 and anodal, negative pole polarity draw be with 107,108 and band 111 heat-sealings be one; After the heat-sealing, packaging film 112, anodal polarity draw be with 107 or negative pole polarity draw be with 108, band 111, three's thickness sum is less than 0.4mm.
Above-mentioned positive electrode material layer 104 can adopt PVDF (Kynoar), PAAS (Sodium Polyacrylate), PMMA (polymethyl methacrylate), PVP (polyvinylpyrrolidone), PVDF-HFP (Kynoar-hexafluoropropylene) or PEO (polyethylene glycol oxide) material with the polymer film 110 of the two sides coating of the negative electrode material layer 105 surperficial polymer films 106 that are provided with and PP or PE film 109; The percentage of its copolymer content is 1～8%, and the thickness of this polymer film 106,110 is comparatively preferred scheme between 1～3um.
The above is merely preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention; Every according to equivalence variation and modification that the present invention did, all covered by the scope of claims of the present invention.
Claims (10)
1. ultrathin polymer Li-ion battery; Comprise electric core; It is characterized in that: said electric in-core is provided with positive and negative plate and films, and is respectively arranged with the positive and negative electrode material layer on this positive and negative plate is filmed, and the surface of this positive and negative electrode material layer is coated with the one layer of polymeric film respectively; Anodal, negative pole polarity is drawn band and is separately positioned on the end that this positive and negative plate is filmed, and filming with this positive and negative plate connects as one, and is provided with one deck barrier film between this positive and negative plate is filmed.
2. a kind of ultrathin polymer Li-ion battery according to claim 1 is characterized in that: the thickness of said polymer film is 1～3um.
3. a kind of ultrathin polymer Li-ion battery according to claim 1 and 2 is characterized in that: said polymer film is pvdf membrane, PAAS film, PMMA film, PVP film, PVDF-HFP film or PEO film.
4. a kind of ultrathin polymer Li-ion battery according to claim 1 is characterized in that: said barrier film comprises one deck PP or PE film, and the two sides of this PP or PE film are coated with the one layer of polymeric film respectively.
5. a kind of ultrathin polymer Li-ion battery according to claim 4 is characterized in that: the thickness of said polymer film is 1～3um.
6. according to claim 4 or 5 described a kind of ultrathin polymer Li-ion batteries, it is characterized in that: said polymer film is pvdf membrane, PAAS film, PMMA film, PVP film, PVDF-HFP film or PEO film.
7. a kind of ultrathin polymer Li-ion battery according to claim 1; It is characterized in that: film positive pole, the negative pole polarity of an end of said positive and negative plate is drawn the band place and is provided with CPP or PP band; And, this positive and negative plate is provided with the packaging film of one deck environmental sealing on filming; This packaging film draws band with anodal, negative pole polarity and the band heat-sealing is one, and its thickness is less than 0.4mm.
8. a preparation method who prepares the described ultrathin polymer Li-ion battery of claim 1 is characterized in that, may further comprise the steps:
A, positive pole, negative material are mixed into paste, are coated in respectively on positive and negative plate films, on this positive and negative plate is filmed, form a positive pole, negative electrode material layer respectively, and should positive pole, negative electrode material layer oven dry, roll, make its curing;
B, this positive and negative plate filmed carry out die-cutly, wherein, the end that this positive and negative plate is filmed is respectively equipped with positive pole, negative pole polarity is drawn band;
C, apply the one layer of polymeric material respectively, form a polymer film on the surface of this positive pole, negative electrode material layer;
D, between positive and negative plate is filmed, be provided with one deck barrier film, this barrier film comprises one deck PP or PE film, and the two sides of this PP or PE film are coated with the one layer of polymeric film respectively;
E, with positive and negative plate film, the superimposed hot pressing of barrier film three is one, its hot pressing temperature is 55～80 ℃.
9. preparation method according to claim 8; It is characterized in that: said c step and the described polymer film of d step are PVDF, PAAS, PMMA, PVP, PVDF-HFP or PEO material; The percentage of its copolymer content is 1～8%, and this polymer film thickness is 1～3um.
10. preparation method according to claim 8; It is characterized in that: also comprise a step after the said e step; Remove positive and negative plate and film and greasy dirt, dirt anodal, that negative pole polarity is drawn belt surface, draw the band place CPP or PP band are set, and on this positive and negative plate is filmed, the packaging film of one deck environmental sealing is set in anodal, negative pole polarity; And packaging film and anodal, negative pole polarity drawn band and the band heat-sealing is one, its thickness is less than 0.4mm.
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| CN201110252610.7A CN102315421B (en) | 2011-08-30 | 2011-08-30 | Ultrathin polymer lithium ion battery and preparation method thereof |
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| CN201110252610.7A CN102315421B (en) | 2011-08-30 | 2011-08-30 | Ultrathin polymer lithium ion battery and preparation method thereof |
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| CN102315421A true CN102315421A (en) | 2012-01-11 |
| CN102315421B CN102315421B (en) | 2014-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881861A (en) * | 2012-09-26 | 2013-01-16 | 中南大学 | High-temperature lithium ion battery anode slice |
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2011
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Patent Citations (6)
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| CN2524380Y (en) * | 2001-11-14 | 2002-12-04 | 厦门宝龙工业股份有限公司 | Rechargeable polymer lithium ion button cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102881861A (en) * | 2012-09-26 | 2013-01-16 | 中南大学 | High-temperature lithium ion battery anode slice |
| CN102881861B (en) * | 2012-09-26 | 2015-08-19 | 中南大学 | A kind of high-temperature lithium ion battery anode slice |
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| CN102315421B (en) | 2014-08-20 |
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