CN101867058A - Manufacturing method for electric core - Google Patents

Manufacturing method for electric core Download PDF

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Publication number
CN101867058A
CN101867058A CN201010222189A CN201010222189A CN101867058A CN 101867058 A CN101867058 A CN 101867058A CN 201010222189 A CN201010222189 A CN 201010222189A CN 201010222189 A CN201010222189 A CN 201010222189A CN 101867058 A CN101867058 A CN 101867058A
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CN
China
Prior art keywords
plate
negative
positive
weight
electric core
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CN201010222189A
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Chinese (zh)
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CN101867058B (en
Inventor
杨琳哲
邓江南
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湖南科霸汽车动力电池有限责任公司
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Priority to CN2010102221890A priority Critical patent/CN101867058B/en
Publication of CN101867058A publication Critical patent/CN101867058A/en
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Publication of CN101867058B publication Critical patent/CN101867058B/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention provides a manufacturing method for an electric core, which is formed by alternatively laminating a positive electrode plate, a diaphragm and a negative electrode plate. Firstly, the weight of the electrode plate is divided finely; the positive electrode plates or the negative electrode plates are matched according to the reasonable rules, so that the total weight of the active matter of the positive electrode of the single electric core and the total weight of the active matter of the negative electrode are controlled within a smaller range, thereby greatly reducing the capability aberration and the extreme difference between the single batteries in the battery packs connected in series. On the other hand, by adopting the method, the capability aberration between the single batteries is small, so that the utilization rate of the single battery is promoted when the battery is assembled. The method has the advantages of simple and easy operation, and is quite suitable for improving the uniformity of the single battery greatly in the mechanical automation conditions, thereby the invention has wide application prospect in various high-level fields of the battery.

Description

The manufacture method of electricity core
Technical field
The present invention relates to the manufacture method of inside battery parts, particularly the manufacture method of electric core components wherein.
Background technology
When electrokinetic cell is made, need single electric core is together in series in groups, could satisfy the high-tension requirement of electrokinetic cell.Battery pack after the series connection, its capacity depend on minimum one of capacity in all single electric cores, and therefore the consistency of electric core is good more, and the battery performance after the series connection is then good more.And the capacity consistency of electric core comes from the consistency of the used pole piece capacity of electric core, and the pole piece capacity then mainly depends on content of active substance in the pole piece.The way of making electric core at present is that pole piece difference by weight is divided into different class, respectively the pole piece in each class is used to make electric core then separately, can bring two defectives like this, the one, pole piece, electric core, battery all will divide a lot of class, and production efficiency is low; The second, the activity substance content of each electric core is different, thereby same series-produced monocell capacity scattered error is big, and when forming battery pack, the utilance of monocell is low.
Summary of the invention
The present invention aims to provide a kind of positive plate and negative plate activity substance content distribution uniformity is better, the electric core manufacture method that the positive and negative electrode capacity consistency of monocell is better and production efficiency is higher.
The present invention realizes by following scheme: electric core is by a slice positive plate, barrier film and at least 2 negative plate mutual superposition at least, separate with barrier film between every positive plate and the every negative plate, all positive plates constitute positive pole, all negative plates constitute negative pole, making anodal and negative pole may further comprise the steps: the weight of a) pressing positive plate, positive plate is divided into some shelves, and every grade weight range value is identical, by gently to weight called after A successively 1, A 2, A 3A NB) press the weight of negative plate, negative plate is divided into some shelves, every grade weight range value is identical, by gently to weight called after B successively 1, B 2, B 3B NC) positive plate of the heaviest gear of the positive plate of the gear that weight is the lightest and weight is made into one group, the positive plate of the inferior heavy gear of the positive plate of the gear that weight is time light and weight is made into one group, by that analogy, at interval minimum or up to the weight gear continuously every (promptly being in the identical weight gear) one group, positive plate is divided into some groups, promptly positive plate is divided into groups by table 1 grid pattern; Table 1
??A 1-A N ??A 2-A ?N-1 ??A 3-A N-2 ??A 4-A N-3 ??…….
In the table 1, each grid is represented one group of positive plate, and it is minimum at interval or continuously every (promptly being in the identical weight gear) that last organizes the gear weight of the pole piece in the last grid of i.e. table 1; D) negative plate of the heaviest gear of the negative plate of the gear that weight is the lightest and weight is made into one group, the negative plate of the inferior heavy gear of the negative plate of the gear that weight is time light and weight is made into one group, by that analogy, up to weight gear interval minimum or continuously every (promptly being in the identical weight gear) one group, negative plate is divided into some groups; Promptly positive plate is divided into groups by table 2 grid pattern; Table 2
??B 1-B N ??B 2-B N-1 ??B 3-B N-2 ??B 4-B N-3 ??……
In the table 2, each grid is represented one group of negative plate, and it is minimum at interval or continuously every (promptly being in the identical weight gear) that last organizes the gear weight of the pole piece in the last grid of i.e. table 2; E) if the positive plate in the electric core is the even number sheet, then any same positive plate group after grouping (promptly in the table 1 any on grid) lining is chosen continuous two positive plates that two positive plates pairings are used for electric core positive pole arbitrarily; If the positive plate in the electric core is the odd number sheet, then in the end choose the first slice positive plate of a slice wantonly in one group of positive plate group (i.e. last grid in the table 1) as electric core, other again in any a group of all positive plate groups (i.e. any one grid in the table 1) choose the pairing of two positive plates arbitrarily, be used for continuous two positive plates of electric core positive pole; F) if the negative plate in the electric core is the even number sheet, then any same negative plate group after grouping (i.e. any one grid in the table 2) lining is chosen continuous two negative plates that two negative plate pairings are used for electric core negative pole arbitrarily; If the negative plate in the electric core is the odd number sheet, then in the end (i.e. last grid in the table 2) optional a slice is as first negative plate of electric core in one group, and other chooses continuous two negative plates that two negative plates pairings are used for electric core negative pole more arbitrarily in any one group (i.e. any one grid in the table 2) lining of all negative plate groups; For improving the pole piece utilance, when pole piece matches, the preferential pole piece pairing of selecting in bigger at interval one group of gear is positioned at the pattern of the grid on the left side in the priority selection 1 during i.e. positive plate pairing, then be positioned at the pattern of the left side grid during negative plate pairing in the priority selection 2.
The pole piece stepping is meticulous more, and the electric core consistency of being produced is good more, but operation is complicated more.
Compared with prior art, the method that electric core of the present invention is made is simple, easy to operate, efficient is high, reduce capacity scattered error and extreme difference between each cell in the series battery widely, thereby can improve the utilance of the monocell in battery when assembling, can significantly improve the consistency of monocell under the mechanical automation condition.
Embodiment
Embodiment 1Comprise that with making the electric core of 10 positive poles, 11 negative poles is an example.
1) with weight range qualified anodal 10 between 5.01-5.30g, be that 0.1 gram is a standard with every grade of weight range, it is divided into is 3 grades as follows.
The class title ??A 1 ??A 2 ??A 3
Weight range/g ??5.01-5.10 ??5.11-5.20 ??5.21-5.30
2) with 11 at the qualified negative pole of weight range between 7.31-7.60g, be that 0.1 gram is a standard with every grade of weight range, it is divided into following 3 grades.
The class title ??B 1 ??B 2 ??B 3
Weight range/g ??7.31-7.40 ??7.41-7.50 ??7.51-7.60
3) positive plate according to the heaviest gear of the positive plate of the lightest gear of weight and weight is made into one group, the positive plate of the inferior heavy gear of the positive plate of the gear that weight is time light and weight is made into one group, mode by that analogy is made into following two groups with three gears of above-mentioned positive pole;
??A 1-A 3 ??A 2
Continuous 2 positive plate in the positive pole of optional two electric cores of conduct in above two groups any same group again, and preferentially select positive plate in first grid of the left side.
4) negative plate according to the heaviest gear of the negative plate of the lightest gear of weight and weight is made into one group, the negative plate of the inferior heavy gear of the negative plate of the gear that weight is time light and weight is made into one group, mode by that analogy is made into following two groups with three gears of above-mentioned negative pole;
??B 1-B 3 ??B 2
First negative plate is selected from B 2A slice in the group, other is continuous two negative plate in the negative pole of optional two electric cores of conduct in above two groups any same group then, and preferentially select the negative plate 5 in first grid of the left side) after pole piece chooses, by existing lamination mode, promptly positive plate, barrier film, the mutual lamination of negative plate are made into electric core again.
Result of implementation: make 1000 electric cores in a manner described, the anodal total weight of electric core all drops between 51.55 ± 0.35 grams, and its standard deviation is 0.07g; The negative pole total weight of electricity core all drops between 74.55 ± 0.37 grams, and its standard deviation is 0.08g.
Embodiment 2Comprise that with making the electric core of 51 positive poles, 52 negative poles is an example.
1) with the 51 slice qualified positive plates of weight range between 4.001-4.200g, be the standard of 0.020 gram with every grade of weight range, it is divided into following 10 grades.
The class title ??A 1 ??A 2 ??A 3 ??A 4
Weight range/g ??4.001-4.020 ??4.021-4.040 ??4.041-4.060 ??4.061-4.080
The class title ??A 5 ??A 6 ??A 7 ??A 8
Weight range/g ??4.081-4.100 ??4.101-4.120 ??4.121-4.140 ??4.141-4.160
The class title ??A 9 ??A 10 ??/ ??/
Weight range/g ??4.161-4.180 ??4.181-4.200 ??/ ??/
2) with the 52 slice qualified negative plates of weight range between 6.101-6.300g, be 0.020 gram with every grade of weight range, it is divided into following 10 grades.
The class title ??B 1 ??B 2 ??B 3 ??B 4
Weight range/g ??6.101-6.120 ??6.121-6.140 ??6.141-6.160 ??6.161-6.180
The class title ??B 5 ??B 6 ??B 7 ??B 8
Weight range/g ??6.181-6.200 ??6.201-6.220 ??6.221-6.240 ??6.241-6.260
The class title ??B 9 ??B 10 ??/ ??/
Weight range/g ??6.261-6.280 ??6.281-6.300 ??/ ??/
3) positive plate according to the heaviest gear of the positive plate of the lightest gear of weight and weight is made into one group, the positive plate of the inferior heavy gear of the positive plate of the gear that weight is time light and weight is made into one group, mode by that analogy is made into following five groups with 10 gears of above-mentioned positive pole;
??A 1-A 10 ??A 2-A 9 ?A 3-A 8 ??A 4-A 7 ??A 5-A 6
First positive plate of electricity core is selected from last group, i.e. A 5-A 6In the group arbitrary, continuous 2 positive plate in the positive pole of optional two electric cores of conduct in the above five groups any same group again, and preferentially select positive plate in first grid of the left side, select again in the second left grid, by that analogy.
4) negative plate according to the heaviest gear of the negative plate of the lightest gear of weight and weight is made into one group, the negative plate of the inferior heavy gear of the negative plate of the gear that weight is time light and weight is made into one group, mode by that analogy is made into following five groups with 10 gears of above-mentioned negative pole;
??B 1-B 10 ??B 2-B 9 ??B 3-B 8 ??B 4-B 7 ??B 5-B 6
Continuous 2 negative plate in the optional negative pole of two negative plates in the above five groups any same group again as electric core, and preferentially select negative plate in first grid of the left side, select again in the second left grid, by that analogy.
5) after pole piece was chosen, by existing lamination mode, promptly positive plate, barrier film, the mutual lamination of negative plate were made into electric core again.
Result of implementation: make 1000 electric cores by the present embodiment mode, the anodal total weight of electric core all drops between 209.100 ± 0.125 grams, and standard deviation is 0.030g; The negative pole total weight of electricity core all drops between 322.400 ± 0.125 grams, and standard deviation is 0.030g.

Claims (2)

1. the manufacture method of an electric core, at least a slice positive plate, barrier film and at least 2 negative plate mutual superposition, separate with barrier film between every positive plate and the every negative plate, all positive plates constitute positive pole, all negative plates constitute negative pole, it is characterized in that: the selection of positive plate and negative plate may further comprise the steps
A) press the weight of positive plate, positive plate is divided into some shelves, every grade weight range value is identical;
B) press the weight of negative plate, negative plate is divided into some shelves, every grade weight range value is identical;
C) positive plate of the heaviest gear of the positive plate of the gear that weight is the lightest and weight is made into one group, the positive plate of the inferior heavy gear of the positive plate of the gear that weight is time light and weight is made into one group, by that analogy, at interval minimum or nonseptate one group up to the weight gear, positive plate is divided into some groups;
D) negative plate of the heaviest gear of the negative plate of the gear that weight is the lightest and weight is made into one group, the negative plate of the inferior heavy gear of the negative plate of the gear that weight is time light and weight is made into one group, by that analogy, at interval minimum or nonseptate one group up to the weight gear, negative plate is divided into some groups;
E), then in any one the positive plate group after the grouping, choose continuous two positive plates that two positive plate pairings are used for electric core positive pole arbitrarily if the positive plate in the electric core is the even number sheet; If the positive plate in the electric core is the odd number sheet, then in the end choose first positive plate that a slice is used for electric core positive pole wantonly in one group of positive plate group, other chooses continuous two positive plates that two positive plates pairings are used for electric core positive pole more arbitrarily in any a group of all positive plate groups;
F), then in any one the negative plate group after the grouping, choose continuous two negative plates that two negative plate pairings are used for electric core negative pole arbitrarily if the negative plate in the electric core is the even number sheet; If the negative plate in the electric core is the odd number sheet, then in the end choose first negative plate that a slice is used for electric core negative pole wantonly in one group of negative plate group, other chooses continuous two negative plates that two negative plates pairings are used for electric core negative pole more arbitrarily in any a group of all negative plate groups.
2. the manufacture method of electric core as claimed in claim 1 is characterized in that: when described pole piece matches, preferentially select one group of bigger at interval interior pole piece pairing of gear.
CN2010102221890A 2010-07-09 2010-07-09 Manufacturing method for electric core CN101867058B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102280665A (en) * 2011-07-01 2011-12-14 山东上存能源股份有限公司 Production method of lithium ion power battery with consistency improved
CN104810561A (en) * 2014-03-20 2015-07-29 万向A一二三系统有限公司 Preparation method of lithium-ion power battery cell
CN107565172A (en) * 2017-10-18 2018-01-09 山东圣阳电源股份有限公司 A kind of lithium ion battery manufacture method
CN107560697A (en) * 2017-09-22 2018-01-09 湖南科霸汽车动力电池有限责任公司 A kind of online full inspection method of anode sheet weight

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JP2005078994A (en) * 2003-09-02 2005-03-24 Matsushita Electric Ind Co Ltd Alkaline storage battery and method of manufacturing the same
US20070099075A1 (en) * 2005-10-28 2007-05-03 Panasonic Ev Energy Co., Ltd. Rechargeable battery and method of manufacturing the same
CN101202358A (en) * 2007-12-03 2008-06-18 天津市航力源科技有限公司 Technological process for flexible packing lithium ion battery auxiliary device using the cylindrical form
CN101577330A (en) * 2009-06-22 2009-11-11 天津力神电池股份有限公司 Method for preparing winding electrode slice of lithium ion battery electrode assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005078994A (en) * 2003-09-02 2005-03-24 Matsushita Electric Ind Co Ltd Alkaline storage battery and method of manufacturing the same
US20070099075A1 (en) * 2005-10-28 2007-05-03 Panasonic Ev Energy Co., Ltd. Rechargeable battery and method of manufacturing the same
CN101202358A (en) * 2007-12-03 2008-06-18 天津市航力源科技有限公司 Technological process for flexible packing lithium ion battery auxiliary device using the cylindrical form
CN101577330A (en) * 2009-06-22 2009-11-11 天津力神电池股份有限公司 Method for preparing winding electrode slice of lithium ion battery electrode assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102280665A (en) * 2011-07-01 2011-12-14 山东上存能源股份有限公司 Production method of lithium ion power battery with consistency improved
CN102280665B (en) * 2011-07-01 2013-06-12 山东上存能源股份有限公司 Production method of lithium ion power battery with consistency improved
CN104810561A (en) * 2014-03-20 2015-07-29 万向A一二三系统有限公司 Preparation method of lithium-ion power battery cell
CN107560697A (en) * 2017-09-22 2018-01-09 湖南科霸汽车动力电池有限责任公司 A kind of online full inspection method of anode sheet weight
CN107560697B (en) * 2017-09-22 2019-08-13 湖南科霸汽车动力电池有限责任公司 A kind of online full inspection method of anode sheet weight
CN107565172A (en) * 2017-10-18 2018-01-09 山东圣阳电源股份有限公司 A kind of lithium ion battery manufacture method

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