CN108832191A - A kind of method of the encapsulated fixation of core of lithium ion cell - Google Patents
A kind of method of the encapsulated fixation of core of lithium ion cell Download PDFInfo
- Publication number
- CN108832191A CN108832191A CN201810673108.5A CN201810673108A CN108832191A CN 108832191 A CN108832191 A CN 108832191A CN 201810673108 A CN201810673108 A CN 201810673108A CN 108832191 A CN108832191 A CN 108832191A
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- Prior art keywords
- lithium ion
- glue
- core
- fixation
- ion cell
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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
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- 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 present invention provides a kind of methods of the encapsulated fixation of core of lithium ion cell, improve existing fixed mode of taping, in such a way that glue carries out pasting fixation, the last epilog portion of diaphragm is fixed on anode pole piece or cathode pole piece, any position of pole piece can be fixed on.The method optimizes existing technique for fixing, improves lithium ion battery production efficiency, reduces its manufacturing cost, meets the demand of wider scope in lithium ion battery production.The fixing means, using specific glue, which is made of specific binder and solvent, and using the glue of specific preparation method preparation, the glue sticking effect is more preferably.
Description
Technical field
The present invention relates to technical field of lithium ion, in particular to a kind of encapsulated fixation of core of lithium ion cell
Method.
Background technique
In recent years, electric car occurs gradually in our life.With the property to power train in vehicle application type lithium ion battery
It can require to be continuously increased, it is desirable that lithium ion battery has many advantages, such as that light weight, specific energy are high, voltage platform is high, environmentally protective.?
Electronic equipment, energy storage device and electric vehicle etc. using more and more extensive, production effect is improved to lithium ion battery
Rate and the requirement for reducing cost are also higher and higher, to seriously restrict the development of lithium ion battery.
Currently, lithium ion battery production has takeup type structure and two kinds of laminated structure.Traditional battery rubberizing mode
It is cumbersome, it is low efficiency, at high cost.Rubberizing has the corrugated defect of diaphragm, and adhesive tape caking property is bad, influences the stabilization of battery structure
Property, while phenomena such as cause electric core membrane to wrinkle.
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of method of encapsulated fixation of core of lithium ion cell, the lithium-ion electric
The method of the encapsulated fixation of Chi Xin, by way of improving rubberizing and and glue composition, the method fixed with specific glue,
Replace existing fixed mode of taping, optimize the prior art, improve lithium ion battery production efficiency, reduce its manufacture at
This, meets the needs of wider scope in lithium ion battery production.
In order to realize above-mentioned purpose of the invention, spy uses following technical scheme：
A kind of method of the encapsulated fixation of core of lithium ion cell, includes the following steps：
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted at the ending after diaphragm wrapping using glue
It is fixed on the upper of positive plate or negative electrode tab.
The method of the encapsulated fixation of core of lithium ion cell provided herein is improved existing fixed mode of taping, is adopted
It is carried out pasting fixed mode with glue, the last epilog portion of diaphragm is fixed on anode pole piece or cathode pole piece, it can
To be fixed on any position of pole piece.The method optimizes existing technique for fixing, improves lithium ion battery production efficiency, reduces
Its manufacturing cost meets the demand of wider scope in lithium ion battery production.
Preferably, the glue is pasted and fixed on the centre or two sides of positive plate or negative electrode tab；
Preferably, before the step of the fixation, further include the steps that drying at a temperature of 65 DEG C~75 DEG C.
Preferably, the gelatin viscosity be 1000-5000mpas, more preferably 3000-5000mpas, still more preferably
It is 4000-5000mpas.
Preferably, the glue is made of binder and solvent.
Preferably, based on parts by weight, the glue is made of 3-12 parts of binders and 88-97 parts of solvents.
Preferably, the binder is Kynoar.
Preferably, the molecular weight of the Kynoar is 10000-1500000；Preferred molecular weight is 500000-
1500000。
Preferably, the solvent is acetone.
Preferably, the preparation method of the glue, specifically includes following steps：
(1) binder is added in solvent and is stirred, dissolve it sufficiently；
(2) continue to stir after dissolving, then reduce mixing speed, stir the viscosity to the glue in 1000-
5000mpas obtains the glue.
Preferably, in step (1), the time of the stirring is 0.5-1.5h, more preferably 1-1.5h.
Preferably, in step (2), the time for continuing stirring is 2-3.5h, more preferably 2-3h.
Compared with prior art, beneficial effects of the present invention are：
(1) method of the encapsulated fixation of core of lithium ion cell provided herein improves existing fixed mode of taping,
In such a way that glue carries out pasting fixation, the last epilog portion of diaphragm is fixed on anode pole piece or cathode pole piece,
Any position of pole piece can be fixed on.The method optimizes existing technique for fixing, improves lithium ion battery production efficiency, drop
Its low manufacturing cost meets the demand of wider scope in lithium ion battery production.
(2) method of the encapsulated fixation of core of lithium ion cell provided herein, using specific glue, the glue is by spy
Fixed binder and solvent composition.
(3) method of the encapsulated fixation of core of lithium ion cell provided herein, the glue prepared using specific preparation method
Liquid, the glue sticking effect is more preferably.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of the encapsulated fixation of core of lithium ion cell provided in an embodiment of the present invention.
Appended drawing reference：
1- glue spraying position；2- cathode pole piece；3- diaphragm；4- anode pole piece.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with the drawings and specific embodiments, but
Be it will be understood to those of skill in the art that it is following described embodiments are some of the embodiments of the present invention, rather than it is whole
Embodiment is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.Based on the embodiments of the present invention, ability
Domain those of ordinary skill every other embodiment obtained without making creative work, belongs to guarantor of the present invention
The range of shield.The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same
Or production firm person is not specified in instrument, is the conventional products that can be obtained by commercially available purchase.
A kind of method of the encapsulated fixation of core of lithium ion cell, includes the following steps：
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted at the ending after diaphragm wrapping using glue
It is fixed on the upper of positive plate or negative electrode tab.
The method of the encapsulated fixation of core of lithium ion cell provided herein is improved existing fixed mode of taping, is adopted
It is carried out pasting fixed mode with glue, the last epilog portion of diaphragm is fixed on anode pole piece or cathode pole piece, it can
To be fixed on any position of pole piece.The method optimizes existing technique for fixing, improves lithium ion battery production efficiency, reduces
Its manufacturing cost meets the demand of wider scope in lithium ion battery production.
In lithium ion battery, rubberizing is fixed inside shell and battery, and core of lithium ion cell includes positive plate and cathode
The pole piece group of piece composition, diaphragm is equipped between positive and negative plate.Positive plate or negative electrode tab are wrapped by diaphragm to be laminated, the receipts of diaphragm
Tail is pasted on positive plate left part, middle part, right part or negative electrode tab left part, middle part, right part, internal, leads to the glue of preparation at ending
It crosses special spray head and is sprayed on diaphragm ending position, glue is dried and is fixed.
Fixing means please refers to Fig. 1.
Preferably, the glue is pasted and fixed on the centre or two sides of positive plate or negative electrode tab.
Glue caking property is more preferable, therefore does not limit its position for being pasted onto pole piece.
Preferably, before the step of the fixation, further include the steps that drying at a temperature of 65 DEG C~75 DEG C.
Drying can accelerate adhesive side dry, improve the efficiency of the fixing means.
Preferably, the gelatin viscosity be 1000-5000mpas, more preferably 3000-5000mpas, still more preferably
It is 4000-5000mpas.
The viscosity of glue is defined, the viscosity of glue is bigger, and the effect pasted is better.
Preferably, the glue is made of binder and solvent.
Preferably, based on parts by weight, the glue is made of 3-12 parts of binders and 88-97 parts of solvents.
Preferably, the binder is Kynoar.
Preferably, the molecular weight of the Kynoar is 10000-1500000；Preferred molecular weight is 500000-
1500000。
Preferably, the solvent is acetone.
In preferred method, mucus selects Kynoar as binder, and acetone carries out specific group as solvent
The glue of part collocation facilitates firm stickup diaphragm and pole piece.
Preferably, the preparation method of the glue, specifically includes following steps：
(1) binder is added in solvent and is stirred, dissolve it sufficiently；
(2) continue to stir after dissolving, then reduce mixing speed, stir the viscosity to the glue in 1000-
5000mpas obtains the glue.
Preferably, in step (1), the time of the stirring is 0.5-1.5h, more preferably 1-1.5h.
Preferably, in step (2), the time for continuing stirring is 2-3.5h, more preferably 2-3h.
The glue is prepared using the method for feature, binder is added in solvent and is stirred, dissolving it sufficiently will bonding
Agent is added in solvent and stirs, and sufficiently dissolves, continues to stir after dissolution, slow down mixing speed then to eliminate bubble.It will obtain
Slurry carry out viscosity test, if viscosity can discharge in 1000-5000mpas, if viscosity be higher than 5000mpas, then add
Enter some solvents, continue to stir, until viscosity meets the requirements.
Embodiment 1
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted at the ending after diaphragm wrapping using glue
It is fixed on the intermediate position of positive plate or negative electrode tab；Specifically, the glue of preparation is sprayed on diaphragm by special spray head
Glue, is dried fixation by ending position at 65 DEG C.
Wherein, glue is prepared using following methods：
(1) the Kynoar binder that 3 parts of molecular weight are 10000 is added in 97 parts of acetone and stirs 0.5h, sufficiently
Continue to stir 2h after dissolution, slows down mixing speed then to eliminate bubble；
(2) obtained slurry is subjected to viscosity test, if viscosity can discharge in 1000-5000mpas, if viscosity is high
In 5000mpas, then some solvents are added, are stirred, until viscosity meets the requirements.
Embodiment 2
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted at the ending after diaphragm wrapping using glue
It is fixed on the intermediate position of positive plate or negative electrode tab；Specifically, the glue of preparation is sprayed on diaphragm by special spray head
Glue, is dried fixation by ending position at 75 DEG C.
Wherein, glue is prepared using following methods：
(1) the Kynoar binder that 12 parts of molecular weight are 1500000 is added in 88 parts of acetone and stirs 1.5h, filled
Continue to stir 2.5h after dividing dissolution, slows down mixing speed then to eliminate bubble；
(2) obtained slurry is subjected to viscosity test, if viscosity can discharge in 3000-5000mpas, if viscosity is high
In 5000mpas, then some solvents are added, are stirred, until viscosity meets the requirements.
Embodiment 3
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted at the ending after diaphragm wrapping using glue
It is fixed in the right side position of positive plate or negative electrode tab；Specifically, the glue of preparation is sprayed on diaphragm by special spray head
Glue, is dried fixation by ending position at 70 DEG C.
Wherein, glue is prepared using following methods：
(1) the Kynoar binder that 10 parts of molecular weight are 500000 is added in 80 parts of acetone and stirs 1h, sufficiently
Continue to stir 2h after dissolution, slows down mixing speed then to eliminate bubble；
(2) obtained slurry is subjected to viscosity test, if viscosity can discharge in 4000-5000mpas, if viscosity is high
In 5000mpas, then some solvents are added, are stirred, until viscosity meets the requirements.
Embodiment 4
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted at the ending after diaphragm wrapping using glue
It is fixed in the left-hand portion of positive plate or negative electrode tab；Specifically, the glue of preparation is sprayed on diaphragm by special spray head
Glue, is dried fixation by ending position at 65 DEG C.
Wherein, glue is prepared using following methods：
(1) the Kynoar binder that 8 parts of molecular weight are 1000000 is added in 82 parts of acetone and stirs 1h, sufficiently
Continue to stir 3h after dissolution, slows down mixing speed then to eliminate bubble；
(2) obtained slurry is subjected to viscosity test, if viscosity can discharge in 2000-5000mpas, if viscosity is high
In 5000mpas, then some solvents are added, are stirred, until viscosity meets the requirements.
Embodiment 5
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted at the ending after diaphragm wrapping using glue
It is fixed in the left-hand portion of positive plate or negative electrode tab；Specifically, the glue of preparation is sprayed on diaphragm by special spray head
Glue, is dried fixation by ending position at 75 DEG C.
Wherein, glue is prepared using following methods：
(1) the Kynoar binder that 10 parts of molecular weight are 500000 is added in 80 parts of acetone and stirs 1h, sufficiently
Continue to stir 2h after dissolution, slows down mixing speed then to eliminate bubble；
(2) obtained slurry is subjected to viscosity test, if viscosity can discharge in 4000-5000mpas, if viscosity is high
In 5000mpas, then some solvents are added, are stirred, until viscosity meets the requirements.
Experimental example difference fixing means efficiency and manufacturing cost compare
The method of the encapsulated fixation of core of lithium ion cell provided herein and traditional rubberizing mode are compared.Comparison
It the results are shown in Table 1.
Table 1 is the same as fixing means efficiency and manufacturing cost comparing result
Comparing result shows the glue spraying fixed form using battery provided herein, from production efficiency by 1 minute
10 seconds every batteries are reduced to, manufacturing cost can paste 263 by a roll of adhesive tape, and being upgraded to can 660 electricity of glue spraying with 1kg glue
Pond, it will be apparent that improve preparation efficiency, and reduce production cost.
In conclusion the method for the encapsulated fixation of core of lithium ion cell provided herein, improves existing fixation of taping
Mode, using glue paste it is fixed by the way of, the last epilog portion of diaphragm is fixed on anode pole piece or cathode
On pole piece, any position of pole piece can be fixed on.The method optimizes existing technique for fixing, improves lithium ion battery production
Efficiency reduces its manufacturing cost, meets the demand of wider scope in lithium ion battery production.The fixing means, using spy
Fixed glue, the glue are made of specific binder and solvent, and using the glue of specific preparation method preparation, the glue is viscous
Paste better effect.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that the above various embodiments is only used
To illustrate technical solution of the present invention, rather than its limitations；Those skilled in the art should understand that：Without departing substantially from this hair
It in the case where bright spirit and scope, is possible to modify the technical solutions described in the foregoing embodiments, or to wherein
Some or all of technical characteristic is equivalently replaced；And these are modified or replaceed, and do not make the essence of corresponding technical solution
It departs from the scope of the technical solutions of the embodiments of the present invention；It is, therefore, intended that in the following claims including belonging to the present invention
All these substitutions and modifications in range.
Claims (10)
1. a kind of method of the encapsulated fixation of core of lithium ion cell, which is characterized in that include the following steps：
Diaphragm is wrapped to the positive plate or negative electrode tab of stacking lithium ion, is pasted and is fixed using glue at the ending after diaphragm wrapping
In the upper of positive plate or negative electrode tab；
Preferably, the glue is pasted and fixed on the centre or two sides of positive plate or negative electrode tab；
Preferably, before the step of the fixation, further include the steps that drying at a temperature of 65 DEG C~75 DEG C.
2. the method for the encapsulated fixation of core of lithium ion cell according to claim 1, which is characterized in that the gelatin viscosity is
1000-5000mpas, preferably 3000-5000mpas, more preferably 4000-5000mpas.
3. the method for the encapsulated fixation of core of lithium ion cell according to claim 1, which is characterized in that the glue is by bonding
Agent and solvent composition.
4. the method for the encapsulated fixation of core of lithium ion cell according to claim 3, which is characterized in that based on parts by weight,
The glue is made of 3-12 parts of binders and 88-97 parts of solvents.
5. the method for the encapsulated fixation of core of lithium ion cell according to claim 3, which is characterized in that the binder is poly-
Vinylidene.
6. the method for the encapsulated fixation of core of lithium ion cell according to claim 5, the molecular weight of the Kynoar are
10000-1500000；Preferred molecular weight is 500000-1500000.
7. the method for the encapsulated fixation of core of lithium ion cell according to claim 3, which is characterized in that the solvent is third
Ketone.
8. the method for the encapsulated fixation of core of lithium ion cell according to claim 3, which is characterized in that the preparation of the glue
Method specifically includes following steps：
(1) binder is added in solvent and is stirred, dissolve it sufficiently；
(2) continue to stir after dissolving, then reduce mixing speed, stir the viscosity to the glue in 1000-5000mpas, obtain
To the glue.
9. the method for the encapsulated fixation of core of lithium ion cell according to claim 8, which is characterized in that in step (1), institute
The time for stating stirring is 0.5-1.5h, preferably 1-1.5h.
10. the method for the encapsulated fixation of core of lithium ion cell according to claim 7, which is characterized in that in step (2),
The time for continuing stirring is 2-3.5h, preferably 2-3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810673108.5A CN108832191A (en) | 2018-06-26 | 2018-06-26 | A kind of method of the encapsulated fixation of core of lithium ion cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810673108.5A CN108832191A (en) | 2018-06-26 | 2018-06-26 | A kind of method of the encapsulated fixation of core of lithium ion cell |
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| CN108832191A true CN108832191A (en) | 2018-11-16 |
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| CN201810673108.5A Pending CN108832191A (en) | 2018-06-26 | 2018-06-26 | A kind of method of the encapsulated fixation of core of lithium ion cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111668431A (en) * | 2020-05-22 | 2020-09-15 | 惠州锂威新能源科技有限公司 | Diaphragm for winding battery, winding battery and preparation method of winding battery |
| CN112259802A (en) * | 2020-03-31 | 2021-01-22 | 蜂巢能源科技有限公司 | Lithium ion battery lamination method and device |
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| US6461762B1 (en) * | 2000-04-20 | 2002-10-08 | Industrial Technology Research Institute | Rechargeable battery structure having a stacked structure of sequentially folded cells |
| CN105811019A (en) * | 2016-05-07 | 2016-07-27 | 合肥国轩高科动力能源有限公司 | Fabrication device for electrode assembly of winding type lamination battery |
| CN106025374A (en) * | 2016-05-29 | 2016-10-12 | 合肥国轩高科动力能源有限公司 | Method for producing laminated battery |
| CN107528087A (en) * | 2017-09-30 | 2017-12-29 | 惠州亿纬锂能股份有限公司 | A kind of lithium ion battery lamination battery core and preparation method thereof |
-
2018
- 2018-06-26 CN CN201810673108.5A patent/CN108832191A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6461762B1 (en) * | 2000-04-20 | 2002-10-08 | Industrial Technology Research Institute | Rechargeable battery structure having a stacked structure of sequentially folded cells |
| CN105811019A (en) * | 2016-05-07 | 2016-07-27 | 合肥国轩高科动力能源有限公司 | Fabrication device for electrode assembly of winding type lamination battery |
| CN106025374A (en) * | 2016-05-29 | 2016-10-12 | 合肥国轩高科动力能源有限公司 | Method for producing laminated battery |
| CN107528087A (en) * | 2017-09-30 | 2017-12-29 | 惠州亿纬锂能股份有限公司 | A kind of lithium ion battery lamination battery core and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259802A (en) * | 2020-03-31 | 2021-01-22 | 蜂巢能源科技有限公司 | Lithium ion battery lamination method and device |
| CN111668431A (en) * | 2020-05-22 | 2020-09-15 | 惠州锂威新能源科技有限公司 | Diaphragm for winding battery, winding battery and preparation method of winding battery |
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Application publication date: 20181116 |