CN102244299A - Winding battery cell of flexible package battery and manufacturing method thereof as well as lithium battery - Google Patents
Winding battery cell of flexible package battery and manufacturing method thereof as well as lithium battery Download PDFInfo
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- CN102244299A CN102244299A CN2011101527028A CN201110152702A CN102244299A CN 102244299 A CN102244299 A CN 102244299A CN 2011101527028 A CN2011101527028 A CN 2011101527028A CN 201110152702 A CN201110152702 A CN 201110152702A CN 102244299 A CN102244299 A CN 102244299A
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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 relates to a winding battery cell of a flexible package battery. The battery cell comprises a winding body, a diaphragm, an anode lug and a cathode lug, wherein the winding body is formed by the winding anode pieces and cathode pieces; the diaphragm is used for separating the anode pieces and the cathode pieces; the anode lug and the cathode lug are used for leading out the electrodes of the anode pieces and the cathode pieces; the anode pieces and the cathode pieces comprise anode current collectors, a cathode current collectors, an anode active substance and a cathode active substance; the anode active substance and the cathode active substance are coated on the surfaces of the anode current collectors and the surfaces of the cathode current collectors; and the cathode pieces are positioned at a free end in the winding body, the anode pieces are positioned at the free end in the winding body, and the cathode pieces and the anode pieces are arrayed in the same direction. The winding battery cell of the flexible package battery is positioned at the cathode piece in the inner most layer of the winding body and is subjected to overlapped winding twice, thus the anode piece in the inner most layer of the winding body is opposite to the two layers of cathode piece, even though the cathode piece in the inner layer can not enter the piece in place, the anode piece can still be matched and reacted with the secondary inner layer of the cathode piece, thus the anode capacity loss can not be leaded. In addition, the invention also relates to a manufacturing method of the winding battery cell of the flexible package battery and a lithium battery adopting the winding battery cell.
Description
[technical field]
Present embodiment relates to technical field of lithium batteries, relates in particular to a kind of flexible package lithium cell takeup type electricity core and preparation method thereof and lithium battery.
[background technology]
Common flexible package coiling type lithium battery comprises structures such as takeup type electricity core, electrolyte and encapsulating film, and wherein, electrolyte is sealed in the encapsulating film.The barrier film that the electricity core comprises the positive/negative plate of coiling and is used for positive/negative plate is separated.Positive/negative plate comprises the both positive and negative polarity collector and is coated in the both positive and negative polarity active material of both positive and negative polarity collection liquid surface, in addition, further is provided with the positive and negative lug that electrode is drawn on the positive/negative plate.Traditional takeup type core strueture as shown in Figure 3 and Figure 4; perfect condition for reeling among Fig. 3; negative plate is gone into sheet and is put in place, and positive/negative plate normally mates reaction, but when reality is reeled; the situation of Fig. 4 appears in regular meeting; when Fig. 4 was improper coiling, negative plate can not be gone into sheet and be put in place, does not have negative pole to cause positive electrode capacity that partial loss is arranged between the two-layer positive pole; can't bring into play heap(ed) capacity, thereby influence the capacity of whole lithium battery.
[summary of the invention]
Based on this, be necessary to provide a kind of and can effectively avoid flexible package lithium cell takeup type electricity core that positive pole can not mate reaction fully and preparation method thereof.
A kind of flexible package lithium cell takeup type electricity core, comprise the coiling body that forms around volume by positive and negative plate, the barrier film that described positive and negative plate is separated and the positive and negative lug that the electrode of described positive and negative plate is drawn, described positive and negative plate comprises the positive and negative electrode collector and is coated in the positive and negative electrode active material of described positive and negative electrode collection liquid surface, wherein, described negative plate is positioned at the free end of described coiling body and free end that described positive plate is positioned at described coiling body is all arranged towards same direction.。
In preferred embodiment, described plus plate current-collecting body is an aluminium foil, and described negative current collector is a Copper Foil.
In preferred embodiment, being positioned at the outermost collector of described coiling body is plus plate current-collecting body, and described plus plate current-collecting body end is longer than the end of described negative current collector.
In preferred embodiment, the end that is positioned at the outer field described positive and negative electrode collector of described coiling body is provided with the gummed paper that is used for fixing.
Above-mentioned flexible package lithium cell takeup type electricity core, be positioned at twice of the overlapping coiling of negative plate of coiling body innermost layer, negative plate is positioned at the free end of coiling body and free end that positive plate is positioned at coiling body is all arranged towards same direction, thereby the positive plate of coiling body innermost layer is relative with two-layer negative plate, even can not going into sheet, the negative plate of internal layer puts in place, positive plate still can react with the negative plate coupling of inferior internal layer, thereby can not cause the positive electrode capacity loss, can effectively improve the capacity of lithium battery and stablizing of performance.
A kind of manufacture method of flexible package lithium cell takeup type electricity core comprises the steps:
Positive and negative plate is provided, and described positive and negative plate is cut into appropriate length, wherein, described positive and negative plate comprises the positive and negative electrode collector and is coated in the positive and negative electrode active material of described positive and negative electrode collection liquid surface;
Reel after the positive and negative plate that cuts separated with barrier film, and make the negative plate can overlapping coiling twice at innermost layer, thereby described negative plate be positioned at the free end of described coiling body and free end that described positive plate is positioned at described coiling body is all arranged towards same direction;
The end of positive and negative plate is fixed, finished the making of described flexible package lithium cell takeup type electricity core.
Preferably, during coiling, plus plate current-collecting body is reeled around the negative current collector of internal layer at outermost layer.
Above-mentioned manufacturing process principle is simple, low for equipment requirements, but wide popularization and application.
In addition, also be necessary to provide a kind of both positive and negative polarity of effectively avoiding to mate the lithium battery of reaction fully.
A kind of lithium battery comprises electric core, electrolyte and encapsulating film; Described electric core and electrolyte are sealed in the described encapsulating film; Described electric core comprises the coiling body that is formed around volume by positive and negative plate, the barrier film that described positive and negative plate is separated and the positive and negative lug that the electrode of described positive and negative plate is drawn; Described positive and negative plate comprises the positive and negative electrode collector and is coated in the positive and negative electrode active material of described positive and negative electrode collection liquid surface, wherein, described negative plate is positioned at the free end of described coiling body and free end that described positive plate is positioned at described coiling body is all arranged towards same direction.
In preferred embodiment, described plus plate current-collecting body is an aluminium foil, and described negative current collector is a Copper Foil.
In preferred embodiment, being positioned at the outermost collector of described coiling body is plus plate current-collecting body, and described plus plate current-collecting body end is longer than the end of described negative current collector.
In preferred embodiment, the end that is positioned at the outer field described positive and negative electrode collector of described coiling body is provided with the gummed paper that is used for fixing.
This lithium battery adopts takeup type electricity core, be positioned at twice of the overlapping coiling of negative plate of coiling body innermost layer, negative plate is positioned at the free end of coiling body and free end that positive plate is positioned at coiling body is all arranged towards same direction, thereby the positive plate of coiling body innermost layer is relative with two-layer negative plate, even can not going into sheet, the negative plate of internal layer puts in place, positive plate still can react with the negative plate coupling of inferior internal layer, thereby can not cause the positive electrode capacity loss, can effectively improve the capacity of lithium battery and stablizing of performance.
[description of drawings]
Fig. 1 is the structural representation of the takeup type electricity core negative pole of an embodiment when normally going into sheet;
The structural representation of Fig. 2 when to be that the takeup type electricity core negative pole of an embodiment is improper go into sheet;
Structural representation when Fig. 3 normally goes into sheet for traditional takeup type electricity core negative pole;
Structural representation when Fig. 4 goes into sheet for traditional takeup type electricity core negative pole is improper.
[embodiment]
Mainly reaching specific embodiment below in conjunction with the accompanying drawings is described in further detail with lithium battery flexible package lithium cell takeup type electricity core and preparation method thereof.
As depicted in figs. 1 and 2, the flexible package lithium cell takeup type of present embodiment electricity core comprises the coiling body 100 that formed around volume by positive plate 110 and negative plate 120, the barrier film 130 that positive plate 110 and negative plate 120 are separated and anode ear and the negative electrode lug (scheming not show) that the electrode of positive plate 110 and negative plate 120 is drawn.
Among Fig. 2, when positive plate 110 was reeled with negative plate 120, negative plate 120 can be gone into sheet and be put in place, thereby anodal internal layer 116 can well mate reaction with negative pole internal layer 126, the lithium battery capacity that is assembled into maximization.
Among Fig. 2, positive plate 110 and negative plate 120 when reeling, or reasons such as error when reeling bad owing to cutoff length control, negative plate 120 can not well be gone into sheet and be put in place, negative pole internal layer 126 and anodal internal layer 116 relative parts leave space 200.Traditional negative plate has only one deck at internal layer, thereby in that negative plate is improper when going into sheet, the existence between the two-layer positive plate because space can not well be mated with negative pole and be reacted, and the capacity of battery is influenced, and the stability of entire cell is not high yet.Please continue with reference to figure 4, in the present embodiment since negative pole 120 reel twice at the interior ply of coiling body 100, include time interior survey 128 of negative pole internal layer 126 and negative pole, thereby timely negative pole internal layer 126 can not be gone into sheet and be put in place, there is space 200, anodal internal layer 116 space 200 parts can also continue with negative pole time in survey 128 coupling reactions, thereby the capacity of whole electric core can not reduce too much, the stability of assembling the lithium battery that obtains also can effectively be improved.
This flexible package lithium cell takeup type electricity core, be positioned at twice of the negative plate 120 overlapping coiling of coiling body 100 innermost layers, thereby the positive plate 110 of coiling body 100 innermost layers is relative with two-layer negative plate 120, even can not going into sheet, the negative plate of internal layer 120 puts in place, positive plate 110 still can react with negative pole time internal layer 128 couplings, thereby the capacitance loss that can not cause positive plate 110 can effectively improve the capacity of lithium battery and stablizing of performance.
The takeup type electricity core of present embodiment, being positioned at coiling body 100 outermost collectors is plus plate current-collecting body 112, and plus plate current-collecting body 112 ends are longer than the end of negative current collector 122.The end of plus plate current-collecting body 112 extends to outside the end of negative current collector 122, can effectively avoid the burr of plus plate current-collecting body 112 ends to pierce through barrier film 130 makes positive plate 110 contact with negative plate 120 and causes short circuit, improve the stability of takeup type electricity core, thereby improved the stability of whole lithium battery.
Preferably, the plus plate current-collecting body 112 of present embodiment is an aluminium foil, and negative current collector 122 is a Copper Foil.
Further, the takeup type of present embodiment electricity core, the end that is positioned at coiling body 100 outer field positive and negative electrode collectors 112 and 122 is provided with the gummed paper 140 that is used for fixing.
The manufacturing process of the flexible package lithium cell takeup type electricity core of present embodiment can adopt following method, comprises the steps:
Step S1: positive and negative plate 110 and 120 are provided, and positive and negative plate 110 and 120 cut into appropriate length, wherein, positive and negative plate 110 and 120 comprises positive and negative electrode collector 112 and 122, and the positive and negative electrode active material 114 124 that is coated in positive and negative electrode collector 112 and 122 surfaces.
Step S2: reel after positive and negative plate 110 that will cut and 120 usefulness barrier films 130 are separated, when carrying out the cutting of above-mentioned steps S1, positive and negative plate 110 that needs control cuts and 120 length, make the negative plate 120 can overlapping coiling twice at the innermost layer of coiling body 100, thereby positive plate 110 can be relative with the two-layer negative plate 120 of overlapping coiling, negative plate 120 is positioned at the free end of coiling body and free end that positive plate 110 is positioned at coiling body is all arranged towards same direction.
Step S3: the end of positive and negative plate 110 and 120 is fixed, finished the making of flexible package lithium cell takeup type electricity core.
Preferably, during coiling, plus plate current-collecting body 112 is reeled around the negative current collector 122 of internal layer at outermost layer.To fix than the end of short negative current collector 122 with the mode that gummed paper is pasted or glue is pasted earlier, and then the end of plus plate current-collecting body 112 will be fixed with gummed paper or glue.
Above-mentioned manufacturing process principle is simple, low for equipment requirements, but wide popularization and application.
In addition, the present invention also provides a kind of both positive and negative polarity of effectively avoiding can not mate the lithium battery of reaction fully.This lithium battery adopts above-mentioned takeup type electricity core.Specifically comprise electric core, electrolyte and encapsulating film; Described electric core and electrolyte are sealed in the described encapsulating film; Described electric core comprises the coiling body that is formed around volume by positive and negative plate, the barrier film that described positive and negative plate is separated and the positive and negative lug that the electrode of described positive and negative plate is drawn; Described positive and negative plate comprises the positive and negative electrode collector and is coated in the positive and negative electrode active material of described positive and negative electrode collection liquid surface, wherein, the positive plate that is positioned at described coiling body innermost layer is relative with the two-layer negative plate of overlapping coiling, negative plate is positioned at the free end of coiling body and free end that positive plate is positioned at coiling body is all arranged towards same direction.
And being positioned at the outermost collector of described coiling body is plus plate current-collecting body, and the plus plate current-collecting body end is longer than the end of described negative current collector.Wherein, described plus plate current-collecting body is an aluminium foil, and described negative current collector is a Copper Foil.
Below be above-mentioned lithium battery with the performance parameter of the lithium battery that adopts traditional takeup type electricity core relatively, as following table 1:
Table 1
By last table 1 as can be seen, adopt the lithium battery of takeup type electricity core of the present invention, owing to be positioned at twice of the overlapping coiling of negative plate of coiling body innermost layer, thereby the positive plate of coiling body innermost layer is relative with two-layer negative plate, even can not going into sheet, the negative plate of internal layer puts in place, positive plate still can react with the negative plate coupling of inferior internal layer, thereby can not cause the positive electrode capacity loss, can effectively improve the capacity of lithium battery and stablizing of performance.
The above embodiment has only expressed several execution modes of present embodiment, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the present embodiment claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present embodiment design, can also make some distortion and improvement, these all belong to the protection range of present embodiment.Therefore, the protection range of present embodiment patent should be as the criterion with claims.
Claims (10)
1. flexible package lithium cell takeup type electricity core, comprise the coiling body that forms around volume by positive and negative plate, the barrier film that described positive and negative plate is separated and the positive and negative lug that the electrode of described positive and negative plate is drawn, described positive and negative plate comprises the positive and negative electrode collector and is coated in the positive and negative electrode active material of described positive and negative electrode collection liquid surface, it is characterized in that described negative plate is positioned at the free end of described coiling body and free end that described positive plate is positioned at described coiling body is all arranged towards same direction.
2. flexible package lithium cell takeup type electricity core as claimed in claim 1 is characterized in that described plus plate current-collecting body is an aluminium foil, and described negative current collector is a Copper Foil.
3. flexible package lithium cell takeup type electricity core as claimed in claim 1 is characterized in that being positioned at the outermost collector of described coiling body is plus plate current-collecting body, and described plus plate current-collecting body end is longer than the end of described negative current collector.
4. flexible package lithium cell takeup type electricity core as claimed in claim 1 is characterized in that the end that is positioned at the outer field described positive and negative electrode collector of described coiling body is provided with the gummed paper that is used for fixing.
5. the manufacture method of a flexible package lithium cell takeup type electricity core is characterized in that, comprises the steps:
Positive and negative plate is provided, and described positive and negative plate is cut into appropriate length, wherein, described positive and negative plate comprises the positive and negative electrode collector and is coated in the positive and negative electrode active material of described positive and negative electrode collection liquid surface;
Reel after the described positive and negative plate that cuts separated with barrier film, and make the negative plate can overlapping coiling twice at innermost layer, thereby negative plate be positioned at the free end of described coiling body and free end that described positive plate is positioned at described coiling body is all arranged towards same direction;
The end of positive and negative plate is fixed, finished the making of described flexible package lithium cell takeup type electricity core.
6. the manufacture method of flexible package lithium cell takeup type electricity core as claimed in claim 5 is characterized in that during coiling, plus plate current-collecting body is reeled around the negative current collector of internal layer at outermost layer.
7. a lithium battery comprises electric core, electrolyte and encapsulating film; Described electric core and electrolyte are sealed in the described encapsulating film; Described electric core comprises the coiling body that is formed around volume by positive and negative plate, the barrier film that described positive and negative plate is separated and the positive and negative lug that the electrode of described positive and negative plate is drawn; Described positive and negative plate comprises the positive and negative electrode collector and is coated in the positive and negative electrode active material of described positive and negative electrode collection liquid surface, it is characterized in that described negative plate is positioned at the free end of described coiling body and free end that described positive plate is positioned at described coiling body is all arranged towards same direction.
8. lithium battery as claimed in claim 7 is characterized in that, described plus plate current-collecting body is an aluminium foil, and described negative current collector is a Copper Foil.
9. lithium battery as claimed in claim 7 is characterized in that, being positioned at the outermost collector of described coiling body is plus plate current-collecting body, and described plus plate current-collecting body end is longer than the end of described negative current collector.
10. lithium battery as claimed in claim 7 is characterized in that, the end that is positioned at the outer field described positive and negative electrode collector of described coiling body is provided with the gummed paper that is used for fixing.
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CN2011101527028A CN102244299A (en) | 2011-06-08 | 2011-06-08 | Winding battery cell of flexible package battery and manufacturing method thereof as well as lithium battery |
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CN2011101527028A CN102244299A (en) | 2011-06-08 | 2011-06-08 | Winding battery cell of flexible package battery and manufacturing method thereof as well as lithium battery |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109428109A (en) * | 2017-09-05 | 2019-03-05 | 住友化学株式会社 | The manufacturing method of electrode for secondary battery component and electrode for secondary battery component |
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CN1337756A (en) * | 2000-08-08 | 2002-02-27 | 松下电器产业株式会社 | Positive electrode for non-water electrolyte secondary cell and cell adopting same |
CN1988240A (en) * | 2005-12-23 | 2007-06-27 | 深圳市比克电池有限公司 | Winding type soft package lithium ion battery and its preparing method |
EP2208248A1 (en) * | 2007-12-25 | 2010-07-21 | Byd Company Limited | Electrochemical storage cell |
CN102035027A (en) * | 2009-09-25 | 2011-04-27 | 三洋电机株式会社 | Lithium ion secondary battery |
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- 2011-06-08 CN CN2011101527028A patent/CN102244299A/en active Pending
Patent Citations (4)
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CN1337756A (en) * | 2000-08-08 | 2002-02-27 | 松下电器产业株式会社 | Positive electrode for non-water electrolyte secondary cell and cell adopting same |
CN1988240A (en) * | 2005-12-23 | 2007-06-27 | 深圳市比克电池有限公司 | Winding type soft package lithium ion battery and its preparing method |
EP2208248A1 (en) * | 2007-12-25 | 2010-07-21 | Byd Company Limited | Electrochemical storage cell |
CN102035027A (en) * | 2009-09-25 | 2011-04-27 | 三洋电机株式会社 | Lithium ion secondary battery |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109428109A (en) * | 2017-09-05 | 2019-03-05 | 住友化学株式会社 | The manufacturing method of electrode for secondary battery component and electrode for secondary battery component |
CN109428109B (en) * | 2017-09-05 | 2023-07-04 | 住友化学株式会社 | Electrode assembly for secondary battery and method for manufacturing electrode assembly for secondary battery |
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Application publication date: 20111116 |