CN103094618A - Bag-making type lithium ion battery and preparation method thereof - Google Patents
Bag-making type lithium ion battery and preparation method thereof Download PDFInfo
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- CN103094618A CN103094618A CN2012105541391A CN201210554139A CN103094618A CN 103094618 A CN103094618 A CN 103094618A CN 2012105541391 A CN2012105541391 A CN 2012105541391A CN 201210554139 A CN201210554139 A CN 201210554139A CN 103094618 A CN103094618 A CN 103094618A
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- lithium ion
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- ion battery
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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 discloses a bag-making type lithium ion battery and a preparation method thereof. The bag-making type lithium ion battery consists of an aluminum plastic package film, a positive electrode lug, a negative electrode lug, an electrode piece and bag-making type electrode pieces, wherein the electrode pieces and upper and lower layers of membranes are manufactured into a bag containing the electrode pieces in an adhesion manner; the bag-making type electrode pieces and counter electrodes are overlapped together layer to layer to form an electrode group; and the positive electrode lug and the negative electrode lug are respectively welded with a positive electrode lug and a negative electrode lug of the electrode group together. With the adoption of the lithium ion battery provided by the invention, the production efficiency and the yield in manufacturing through a battery assembly process can be improved; and the security problem possibly occurring in a process of using the lithium ion battery can be prevented to a certain extent.
Description
Technical field
The present invention relates to lithium ion battery, particularly relate to a kind of bag formula lithium ion battery and preparation method thereof.
Background technology
The manufacture method of present traditional lithium ion battery mainly contains takeup type and stacked dual mode.The manufacture method of lamination type electric core mainly contains free lamination, " Z " font lamination etc., and diverse ways is applicable to different fields, and the while is the corresponding different mode of manufacturing also.
The manufacture method of free lamination: barrier film, negative plate, barrier film, positive plate ... positive plate, barrier film, negative plate, barrier film etc. successively are formed by stacking by certain technological requirement.Free laminating method is simple, flexible, is fit to the making of manual test battery core.But because the barrier film of this kind method is thin PP, PE film, during lamination, the operations such as the cutting of barrier film, transfer are difficult to control, and be not suitable for automated production, and production efficiency are low.
The manufacture method of " Z " font lamination: the monovolume barrier film is folding by " Z " font, and simultaneously each barrier film is folding once puts into a slice negative plate, positive plate, puts into until complete whole pole pieces.This kind method does not need to cut and shift barrier film, and production efficiency is improved.But the pole piece in these two kinds of methods does not all have constraint, is easy to loosely, easily causes mutual dislocation between positive and negative plate, barrier film, the bad control of aligning accuracy.
Summary of the invention
In view of this, the objective of the invention is to solve the problem of the low and bad control of positive and negative electrode contraposition of production efficiency in prior art, a kind of bag formula lithium ion battery and preparation method thereof is provided.
For this reason, the invention provides a kind of bag formula lithium ion battery, described bag formula lithium ion battery is made of plastic-aluminum packaging film, positive pole ear, negative lug, pole piece and bag pole piece, pole piece is made into a sack that contains pole piece with the two-layer barrier film in up and down by bonding way, bag pole piece and electrode is successively stacked form utmost point group, positive pole ear, negative lug weld together with positive pole ear, the negative lug of utmost point group respectively.
Preferably, described pole piece and upper and lower two-layer barrier film bonding way are heat welded.
Preferably, heating-up temperature is 100-300 ℃.
Preferably, described barrier film is the PE barrier film.
Preferably, described barrier film is the PP barrier film.
Preferably, described barrier film is nonwoven fabrics.
Preferably, described barrier film is ceramic diaphragm.
Preferably, when described barrier film was the PP barrier film, heating-up temperature was 160-180 ℃.
The invention provides a kind of preparation method of bag formula lithium ion battery, comprise the following steps:
(1) positive electrode active materials, negative active core-shell material, conductive agent, binding agent are joined in suitable solvent by a certain percentage, be applied to the two sides of collector after stirring;
(2) pole piece carries out cross cutting by the size of design after drying, rolling, and makes positive plate and negative plate;
(3) adopt bonding way to be made into sack positive plate or negative plate and barrier film;
(4) during lamination with the bag electrode and not the bag electrode successively stack, consist of utmost point group;
(5) after the welding of utmost point group and positive pole ear, negative lug, encapsulate, fluid injection;
(6) preliminary filling, change into rear battery core and complete.
Adopt lithium ion battery provided by the invention and preparation method thereof can improve production efficiency and yields that the battery assembly process is made, and contingent safety problem in the lithium ion battery use procedure had certain prevention:
(1) after the barrier film bag, the protection negative pole contacts with plastic-aluminum packaging film; contact with negative plate and cause electrochemical corrosion after having solved the plastic-aluminum packaging film breakage; and box hat (or aluminum hull) contacts the housing Issues on Static Electrification that causes with negative plate, thereby improved sealing and the security performance of battery core.
(2) after bag when assembling positive plate to be hidden in the core bag inner, the pole piece edge dry linting that has caused because of modes such as vibration, collision, frictions when having avoided core to wrap in assembling has reduced the bad defectives such as self discharge that cause due to powder, has promoted the performance of battery core.
Description of drawings
Fig. 1 is the structural representation of the barrier film bag of bag formula lithium ion battery.
Fig. 2 is the structural representation of the positive plate of bag formula lithium ion battery.
Fig. 3 is the structural representation of the negative plate of bag formula lithium ion battery.
Fig. 4 is the process chart of pocket type lithium ion battery.
Embodiment
In order to make those skilled in the art person understand better the present invention program, below the present invention is described in further detail:
A kind of bag formula lithium ion battery is made of plastic-aluminum packaging film, positive pole ear, negative lug, pole piece and bag pole piece, pole piece and upper and lower two-layer barrier film are made into a sack that contains pole piece by heat-sealable way, and then successively stack composition utmost point group with the sub-pole piece of bag with to electrode, then positive pole ear, negative lug weld together with positive pole ear, the negative lug of utmost point group respectively, encapsulation again after packing with plastic-aluminum packaging film.
Technical solution of the present invention septation, positive pole, barrier film, negative pole lamination assembling mode, battery core is stacked design, negative plate or positive plate and barrier film are packaged into bag, more stacked poling group enters in shell, and the shell of battery core can be plastic-aluminum packaging film or box hat, aluminum hull etc.
The two-layer adjacent barrier film in pole piece up and down adopts heat-sealing or other bonding way is packaged together, and forms sack.
The barrier film packaged type preferentially adopts the mode of heat welded, and the temperature of heating is 100-300 ℃, as adopting PP barrier film, temperature prioritised employing 160-180 ℃.
Negative plate or positive plate are placed in bag, only have lug to expose so that afflux, welding.
The material of barrier film can be PE, PP, nonwoven fabrics, ceramic diaphragm and other known septum for lithium ion battery.
Make the technological process of bag formula lithium ion battery and see Fig. 4, positive and negative plate and barrier film adopt heat-sealable way to be made into sack, for follow-up lamination is prepared.
Negative pole barrier film bag process: barrier film 2 volumes, die-cut good negative plate, bag-making equipment, heat seal die, barrier film cuts into and requires size, its size is coated with film length or the large 1.5-3mm of width than negative plate, negative plate is by certain size punching and shaping, as: negative pole film long 100-200mm, wide 100-200mm films.Heat seal die is heated to 100-300 ℃, and one deck barrier film is put on heat seal die, and die-cut good pole piece is put on barrier film, then the lid layer barrier film, and packaging machine sticks together the two-layer barrier film in up and down and makes sack; With blade, the edge redundance is cut away.
The preparation method of bag formula lithium ion battery is as follows:
(1) positive electrode active materials, negative active core-shell material, conductive agent, binding agent are joined in suitable solvent by a certain percentage, be applied to the two sides of collector after stirring;
(2) pole piece carries out cross cutting by the size of design after drying, rolling, and makes positive plate and negative plate;
(3) adopt bonding way to be made into sack positive plate or negative plate and barrier film;
(4) during lamination with the bag electrode and not the bag electrode successively stack, consist of utmost point group;
(5) after the welding of utmost point group and positive pole ear, negative lug, encapsulate, fluid injection;
(6) preliminary filling, change into rear battery core and complete.
Adopt lithium ion battery provided by the invention can improve production efficiency and yields that the battery assembly process is made, and contingent safety problem in the lithium ion battery use procedure had certain prevention effect:
(1) after the barrier film bag, the protection negative pole contacts with plastic-aluminum packaging film; contact with negative plate and cause electrochemical corrosion after having solved the plastic-aluminum packaging film breakage; and box hat (or aluminum hull) contacts the housing Issues on Static Electrification that causes with negative plate, thereby improved sealing and the security performance of battery core.
(2) after bag when assembling positive plate to be hidden in the core bag inner, the pole piece edge dry linting that has caused because of modes such as vibration, collision, frictions when having avoided core to wrap in assembling has reduced the bad defectives such as self discharge that cause due to powder, has promoted the performance of battery core.
Claims (9)
1. bag formula lithium ion battery, it is characterized in that: described bag formula lithium ion battery is made of plastic-aluminum packaging film, positive pole ear, negative lug, pole piece and bag pole piece, pole piece is made into a sack that contains pole piece with the two-layer barrier film in up and down by bonding way, bag pole piece and electrode is successively stacked form utmost point group, positive pole ear, negative lug weld together with positive pole ear, the negative lug of utmost point group respectively.
2. a kind of bag formula lithium ion battery according to claim 1, it is characterized in that: described pole piece and upper and lower two-layer barrier film bonding way are heat welded.
3. a kind of bag formula lithium ion battery according to claim 2, it is characterized in that: heating-up temperature is 100-300 ℃.
4. a kind of bag formula lithium ion battery according to claim 1, it is characterized in that: described barrier film is the PE barrier film.
5. a kind of bag formula lithium ion battery according to claim 1, it is characterized in that: described barrier film is the PP barrier film.
6. a kind of bag formula lithium ion battery according to claim 1, it is characterized in that: described barrier film is nonwoven fabrics.
7. a kind of bag formula lithium ion battery according to claim 1, it is characterized in that: described barrier film is ceramic diaphragm.
8. a kind of bag formula lithium ion battery according to claim 5, it is characterized in that: heating-up temperature is 160-180 ℃.
9. the preparation method of the described bag formula of any one lithium ion battery in claim 1-8 is characterized in that: comprise the following steps:
(1) positive electrode active materials, negative active core-shell material, conductive agent, binding agent are joined in suitable solvent by a certain percentage, be applied to the two sides of collector after stirring;
(2) pole piece carries out cross cutting by the size of design after drying, rolling, and makes positive plate and negative plate;
(3) adopt bonding way to be made into sack positive plate or negative plate and barrier film;
(4) during lamination with the bag electrode and not the bag electrode successively stack, consist of utmost point group;
(5) after the welding of utmost point group and positive pole ear, negative lug, encapsulate, fluid injection;
(6) preliminary filling, change into rear battery core and complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012105541391A CN103094618A (en) | 2012-12-19 | 2012-12-19 | Bag-making type lithium ion battery and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105541391A CN103094618A (en) | 2012-12-19 | 2012-12-19 | Bag-making type lithium ion battery and preparation method thereof |
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| CN103094618A true CN103094618A (en) | 2013-05-08 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390751A (en) * | 2015-12-17 | 2016-03-09 | 佛山市南海区欣源电子有限公司 | High security soft package lithium ion battery core and manufacture method thereof |
| CN105845869A (en) * | 2016-04-07 | 2016-08-10 | 广东志成冠军集团有限公司 | Packaging structure and packaging process for battery electrode plate |
| CN108055875A (en) * | 2015-09-28 | 2018-05-18 | 罗伯特·博世有限公司 | For manufacturing the method for electrode complex |
| CN108400274A (en) * | 2018-03-15 | 2018-08-14 | 重庆市紫建电子有限公司 | A kind of battery with diaphragm bag making |
| CN109792018A (en) * | 2016-09-27 | 2019-05-21 | 罗伯特·博世有限公司 | Method for manufacturing the stacks of thin films of battery cell |
| CN114914590A (en) * | 2022-05-27 | 2022-08-16 | 重庆市紫建新能源有限公司 | Manufacturing method of circular battery and circular battery thereof |
| WO2024026674A1 (en) * | 2022-08-02 | 2024-02-08 | 宁德新能源科技有限公司 | Secondary battery and preparation method therefor |
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| CN2798323Y (en) * | 2005-04-21 | 2006-07-19 | 惠州Tcl金能电池有限公司 | Stack type lithium ion battery structure |
| CN201146222Y (en) * | 2007-12-14 | 2008-11-05 | 天津力神电池股份有限公司 | Novel lamination type lithium ion secondary battery |
| CN101364638A (en) * | 2008-08-06 | 2009-02-11 | 湖南神舟科技股份有限公司 | Diaphragm separating method for two-side current collecting core of square accumulator |
| CN202050017U (en) * | 2010-12-31 | 2011-11-23 | 力佳电源科技(深圳)有限公司 | Flexible package thin and ultra-thin lithium ion battery |
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Patent Citations (6)
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| US20030039886A1 (en) * | 2001-08-22 | 2003-02-27 | Guiping Zhang | Modified lithium ion polymer battery |
| CN2640052Y (en) * | 2003-08-19 | 2004-09-08 | 比亚迪股份有限公司 | Lithium ion secondary battery |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108055875A (en) * | 2015-09-28 | 2018-05-18 | 罗伯特·博世有限公司 | For manufacturing the method for electrode complex |
| CN108055875B (en) * | 2015-09-28 | 2021-07-20 | 罗伯特·博世有限公司 | Method for producing electrode composite |
| CN105390751A (en) * | 2015-12-17 | 2016-03-09 | 佛山市南海区欣源电子有限公司 | High security soft package lithium ion battery core and manufacture method thereof |
| CN105390751B (en) * | 2015-12-17 | 2023-10-10 | 佛山市欣源电子股份有限公司 | High-safety flexible package lithium ion battery core |
| CN105845869A (en) * | 2016-04-07 | 2016-08-10 | 广东志成冠军集团有限公司 | Packaging structure and packaging process for battery electrode plate |
| CN109792018A (en) * | 2016-09-27 | 2019-05-21 | 罗伯特·博世有限公司 | Method for manufacturing the stacks of thin films of battery cell |
| CN108400274A (en) * | 2018-03-15 | 2018-08-14 | 重庆市紫建电子有限公司 | A kind of battery with diaphragm bag making |
| CN114914590A (en) * | 2022-05-27 | 2022-08-16 | 重庆市紫建新能源有限公司 | Manufacturing method of circular battery and circular battery thereof |
| CN114914590B (en) * | 2022-05-27 | 2024-07-02 | 重庆市紫建新能源有限公司 | Manufacturing method of circular ring battery and circular ring battery |
| WO2024026674A1 (en) * | 2022-08-02 | 2024-02-08 | 宁德新能源科技有限公司 | Secondary battery and preparation method therefor |
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Application publication date: 20130508 |