CN104538677A - Flexibly-packaged lithium ion battery and preparation method thereof - Google Patents
Flexibly-packaged lithium ion battery and preparation method thereof Download PDFInfo
- Publication number
- CN104538677A CN104538677A CN201410832043.6A CN201410832043A CN104538677A CN 104538677 A CN104538677 A CN 104538677A CN 201410832043 A CN201410832043 A CN 201410832043A CN 104538677 A CN104538677 A CN 104538677A
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- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- barrier film
- flexibly
- film
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
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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
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The invention belongs to the technical field of lithium batteries, and relates to a flexibly-packaged lithium ion battery and a preparation method of the flexibly-packaged lithium ion battery. The preparation method of the flexibly-packaged lithium ion battery is characterized in that a conventional positive plate, a negative plate and membranes are laminated in a Z shape; the laminated membrane layers are 10-30 mm wider than the positive plate and the negative plate in a lamination process; the membranes of the width parts on the two sides of the surplus plates are compacted tightly and are subjected to heat seal along the edges of the plates and trimmed; by utilizing top side sealing, the sides of the membranes and an upper layer and a lower layer of an aluminum plastic membrane are packaged together. According to the method, the manufacturing pass percentage and the consistency of the flexibly-packaged lithium ion battery are improved, and the charging/discharging performance of the flexibly-packaged lithium ion battery is improved.
Description
Technical field
The invention belongs to technical field of lithium batteries, relate to a kind of flexible packing lithium ion battery and preparation method thereof.
Background technology
Flexible packing lithium ion battery energy density is large, and security performance is good, and model is various, performance boost space is large, and application is extensive, is especially widely used in new-energy automobile field, the flexible packing lithium ion battery internal resistance of laminar is little, and multiplying power discharging property is good, becomes the emphasis of people's research.
The one of important of exploitation lithium ion battery is updating of battery structure, and flexible packing lithium ion battery internal structure directly decides the key property of battery, and the reasonable lifting of mechanism effectively can promote the lifting of flexible packing lithium ion battery performance.The flexible packing lithium ion battery of laminar controls very strict at lamination process septation tension force, membrane tension is excessive or too smallly all can cause battery liquid-filling metacneme fold, and then affect battery performance, membrane tension is uneven affects battery performance equally, and the problem that current flexible packing lithium ion battery produces due to membrane tension is a lot.
Summary of the invention
The object of this invention is to provide a kind of flexible packing lithium ion battery and preparation method thereof, the technical problem solved prevents inside battery barrier film fold, and in barrier film lamination process, do not need strict tension force to control, guarantee that flexible packing lithium ion battery has good charge-discharge performance.
For achieving the above object, what this patent adopted is technical scheme is:
Flexible packing lithium ion battery, comprise positive plate 1, negative plate 2, barrier film 3 and aluminum plastic film, described positive plate 1, negative plate 2 and barrier film 3 carries out conventional Z-shaped lamination, it is characterized in that, described film stack width 10 ~ 30mm larger than pole piece width, barrier film unnecessary go out pole piece part along pole piece edge compress post heat-seal trim.
Prepare the method for flexible packing lithium ion battery, comprise the following steps: carry out conventional formulations, coating, roll-in, film-making, lamination, encapsulation, battery core baking, fluid injection, change into, drawing liquid is shaping, it is characterized in that, rubberizing is carried out again after completing after described lamination, pole piece width segments barrier film of being had more than needed both sides again compresses, and is heat sealed to by barrier film and trims afterwards together; First described encapsulation carries out first barrier film side and the encapsulation of aluminum plastic film levels, then carries out the encapsulation of second aluminum plastic film levels.
Barrier film heat-sealing trims laminated cell in rear operation process and not easily loosens, and diaphragm edge is encapsulated into and to barrier film uniform tension force, can efficiently solves flexible packing lithium ion battery internal diaphragm buckling problems, improve the chemical property of battery together.Can well battery core be fixed together with diaphragm edge seals with aluminum plastic film, prevent the rock pole piece of battery core in operation process from misplacing, improve the charge-discharge performance of flexible packing lithium ion battery, homogeneity of product and making qualification rate.
Meanwhile, flexible packing lithium ion battery of the present invention will just not need too strict to membrane tension in lamination process, and process control is simple, and lamination efficiency is high, and equipment precision requirement is low, and cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is soft package lithium ion power battery plane graph,
Fig. 2 is laminated cell one sectional side view,
Fig. 3 is profile after the barrier film heat-sealing of laminated cell side,
Fig. 4 is that the barrier film heat-sealing of laminated cell side cuts rear profile,
Fig. 5 is a sectional side view after flexible packing lithium ion battery encapsulation,
1, positive plate, 2, negative plate, 3, barrier film, 4, positive pole ear, 5, negative lug,
6, aluminum plastic film two interlayer heat-sealing barrier film seal, 7, separately aluminum plastic film heat-sealing seal, 8, aluminum plastic film, 9, flexible packing lithium ion battery main body.
Embodiment
Flexible packing lithium ion battery, comprise positive plate 1, negative plate 2, barrier film 3 and aluminum plastic film, described positive plate 1, negative plate 2 and barrier film 3 carries out conventional Z-shaped lamination, described film stack width 10 ~ 30mm larger than pole piece width, barrier film unnecessary go out the part of pole piece compress post heat-seal along pole piece edge and trim.Prepare the method for flexible packing lithium ion battery, comprise the following steps: carry out conventional formulations, coating, roll-in, film-making, lamination, encapsulation, battery core baking, fluid injection, change into, drawing liquid is shaping, rubberizing is carried out again after completing after described lamination, pole piece width segments barrier film of being had more than needed both sides again compresses, and is heat sealed to by barrier film and trims afterwards together; First described encapsulation carries out first barrier film side and the encapsulation of aluminum plastic film levels, then carries out the encapsulation of second aluminum plastic film levels.
Embodiment
Hai Te company makes the soft package lithium ion power battery of HTPN10140200-20Ah-3.6V model, first conventional formulations, coating, roll-in, film-making is carried out, then conventional cathode sheet 1, negative plate 2 and barrier film 3 is used to carry out Z-shaped lamination, lamination process septation stack width 10mm larger than pole piece width, rubberizing is carried out after lamination completes, pole piece width segments barrier film of being had more than needed both sides again compresses, and is heat sealed to trims afterwards together along pole piece edge barrier film.Then tab welding is carried out, carry out top side seal again, first carry out first barrier film side and the encapsulation of aluminum plastic film levels in top side seal process, then carry out the encapsulation of second aluminum plastic film levels, finally carry out battery core baking, fluid injection, change into, drawing liquid is shaping, detect, put in storage.Barrier film heat-sealing trims laminated cell in rear operation process and not easily loosens, and diaphragm edge is encapsulated into and to barrier film uniform tension force, can efficiently solves flexible packing lithium ion battery internal diaphragm buckling problems together.Can well battery core be fixed together with diaphragm edge seals with aluminum plastic film, prevent the rock pole piece of battery core in operation process from misplacing, improve charge-discharge performance and the homogeneity of product of flexible packing lithium ion battery.
Claims (2)
1. a flexible packing lithium ion battery, comprise positive plate (1), negative plate (2), barrier film (3) and aluminum plastic film (8), described positive plate (1), negative plate (2) and barrier film (3) carry out conventional Z-shaped lamination, it is characterized in that, described film stack width 10 ~ 30mm larger than pole piece width, barrier film unnecessary go out pole piece part along pole piece edge compress post heat-seal trim.
2. prepare the method for flexible packing lithium ion battery according to claim 1 for one kind, comprise the following steps: carry out conventional formulations, coating, roll-in, film-making, lamination, encapsulation, battery core baking, fluid injection, change into, drawing liquid is shaping, it is characterized in that, rubberizing is carried out again after completing after described lamination, pole piece width segments barrier film of being had more than needed both sides again compresses, and is heat sealed to by barrier film and trims afterwards together; First described encapsulation carries out first barrier film side and the encapsulation of aluminum plastic film levels, then carries out the encapsulation of second aluminum plastic film levels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832043.6A CN104538677A (en) | 2014-12-29 | 2014-12-29 | Flexibly-packaged lithium ion battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832043.6A CN104538677A (en) | 2014-12-29 | 2014-12-29 | Flexibly-packaged lithium ion battery and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104538677A true CN104538677A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410832043.6A Pending CN104538677A (en) | 2014-12-29 | 2014-12-29 | Flexibly-packaged lithium ion battery and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104538677A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017177456A1 (en) * | 2016-04-15 | 2017-10-19 | 宁德时代新能源科技股份有限公司 | Flexibly-packaged secondary battery |
| CN108878988A (en) * | 2018-06-29 | 2018-11-23 | 深圳吉阳智能科技有限公司 | A kind of lamination band, lamination band making apparatus and laminating equipment |
| CN110504492A (en) * | 2019-08-28 | 2019-11-26 | 珠海冠宇电池有限公司 | It is a kind of to prevent from falling lithium battery of failure and preparation method thereof |
-
2014
- 2014-12-29 CN CN201410832043.6A patent/CN104538677A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017177456A1 (en) * | 2016-04-15 | 2017-10-19 | 宁德时代新能源科技股份有限公司 | Flexibly-packaged secondary battery |
| CN108878988A (en) * | 2018-06-29 | 2018-11-23 | 深圳吉阳智能科技有限公司 | A kind of lamination band, lamination band making apparatus and laminating equipment |
| CN108878988B (en) * | 2018-06-29 | 2024-04-09 | 深圳吉阳智能科技有限公司 | Lamination area, lamination area preparation equipment and lamination equipment |
| CN110504492A (en) * | 2019-08-28 | 2019-11-26 | 珠海冠宇电池有限公司 | It is a kind of to prevent from falling lithium battery of failure and preparation method thereof |
| CN110504492B (en) * | 2019-08-28 | 2022-11-11 | 珠海冠宇电池股份有限公司 | Lithium battery capable of preventing falling failure and preparation method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150422 |
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| RJ01 | Rejection of invention patent application after publication |