CN105406107B - A kind of lithium ion battery and preparation method thereof - Google Patents
A kind of lithium ion battery and preparation method thereof Download PDFInfo
- Publication number
- CN105406107B CN105406107B CN201510790523.5A CN201510790523A CN105406107B CN 105406107 B CN105406107 B CN 105406107B CN 201510790523 A CN201510790523 A CN 201510790523A CN 105406107 B CN105406107 B CN 105406107B
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- Prior art keywords
- tab
- plastic film
- aluminum plastic
- pole piece
- battery core
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
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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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
A kind of lithium ion battery and preparation method thereof, the lithium ion battery include: to stack the battery core that winding is formed by anode pole piece, diaphragm and cathode pole piece；The tab being welded on pole piece；Encapsulate the aluminum plastic film of the battery core；The side ipsilateral with tab of the aluminum plastic film extends beyond the battery core, and the length of aluminum plastic film extension is at least the half of tab protruded length；The tab pressing is closely attached on the aluminum plastic film.The present invention is in packaging electric core, the side of aluminum plastic film is set to extend over tab, and press together tab and aluminum plastic film, so that battery core tab after encapsulation is just fixed on aluminum plastic film by fitting, to prevent tab from being bent in production or transportational process by left and right and causing to be broken；And after tab is fixed, the case where it causes battery core short circuit to be scrapped because of bending also can avoid.
Description
Technical field
The invention belongs to polymer Li-ion battery manufacturing technology field more particularly to a kind of ultrathin lithium ion battery and
Preparation method.
Background technique
Slimline battery is gradually commercialized a kind of novel battery in recent years.Such battery has thickness thin, small in size, again
The advantages that light is measured, is used in the equipment of numerous micromations, low-power consumption, such as visual financial IC card.The total thickness of slimline battery
Degree is generally less than 0.4mm, is limited by its thickness and volume, and selected tab thickness generally only has 0.01mm or so, so
Its tensile strength of thin tab is very low, if it is individually exposed, in battery core production or transportational process, tab will appear brokenly
Damage, fold, fracture risk, scrapped so as to cause battery core；And due to the tab spacing very little of ultra-thin lithium cell, lug bending
When two tabs be easy to contact lead to short circuit, not only reduce production qualification rate, also increase the security risk of battery core.
Summary of the invention
The purpose of the present invention is to provide one kind can be to avoid ultra-thin lithium cell in production, tab fractures and leads in transportational process
Send a telegraph the ultra-thin lithium type ion battery that core is scrapped.
Another object of the present invention is to provide one kind can be to avoid the lithium ion battery that lithium ion cell polar ear fractures
Preparation method.
In order to realize that above-mentioned first purpose, the present invention take following technical solution:
A kind of lithium ion battery, comprising: the battery core that winding is formed is stacked by anode pole piece, diaphragm and cathode pole piece；Welding
Tab on pole piece；Encapsulate the aluminum plastic film of the battery core；The side ipsilateral with tab of the aluminum plastic film extends beyond described
Battery core, and the length of aluminum plastic film extension is at least the half of tab protruded length；The tab pressing is closely attached on the aluminum plastic film
On.
More specifically, the side of the aluminum plastic film extends beyond the edge of tab.
More specifically, high temperature glue-line or insulating resin layer are provided on the section of the aluminum plastic film side.
In order to realize that above-mentioned second purpose, the present invention take following technical solution:
A kind of preparation method of lithium ion battery, comprising the following steps:
Active material is respectively coated on plus plate current-collecting body and negative current collector, anode pole piece and cathode pole piece is made；
Pole piece obtained is cut by process specification, and welds upper tab；
Anode pole piece, diaphragm, cathode pole piece are successively stacked, and rubberizing is fixed, winding forms battery core；
Battery core is precuted out to the protruded length of tab；
Battery core is packaged using aluminum plastic film, and the side ipsilateral with tab of aluminum plastic film is made to extend beyond battery core, and
The length that aluminum plastic film extends is at least the half of tab protruded length；
Tab is pressed on aluminum plastic film, the preparation of completion battery after shaping is flattened.
More specifically, after the surface patch hot melt double-sided adhesive or spray high viscosity resins opposite with aluminum plastic film of the tab
Tab is pressed together on aluminum plastic film.
More specifically, the side of the aluminum plastic film exceeds the edge of tab.
More specifically, high-temp glue or spray insulation resin are pasted on the section of the side after aluminum plastic film is cut.
From the above technical scheme, the aluminum plastic film expansion of outsourcing battery core is prolonged lengthening, is allowed to by the present invention in packaging electric core
More than the length of tab, it is ensured that wherein aluminum plastic film top in side exceeds tab top after battery core encapsulation, and tab is bonded and is fixed
On aluminum plastic film；Then battery core is carried out again the common process production such as being melted into/sort.Since tab is just after encapsulation for battery core of the present invention
It is fixed on aluminum plastic film by fitting, to prevent tab from leading to the risk being broken by left and right bending in production or transportational process；
And after tab is fixed in the present invention, the risk that can prevent it from causing battery core short circuit to scrap or occur accident because of bending.
Detailed description of the invention
It in order to illustrate the embodiments of the present invention more clearly, below will be to required use in embodiment or description of the prior art
Attached drawing do simple introduction, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another embodiment of the present invention.
Specific embodiment
In order to above and other objects of the present invention, feature and advantage can be become apparent from, the embodiment of the present invention is cited below particularly,
And cooperate appended diagram, it is described below in detail.
As shown in Figure 1, lithium ion battery of the invention includes stacking winding by anode pole piece, diaphragm and cathode pole piece to be formed
Battery core 1, tab 2 is welded on anode pole piece and/or cathode pole piece, using 3 welded encapsulation of the aluminum plastic film battery core 1 of tab 2.
The side of aluminum plastic film 3 of the present invention extends beyond battery core 1, and the length d that aluminum plastic film 3 extends is more than or equal to the protruded length h of tab 2
The 1/2 of (i.e. the length of part of the tab beyond battery core), i.e. d >=h/2.The pressing of tab 2 is closely attached on the aluminum plastic film 3 to extend out
On, so that at least more than half is by the fixed protection of aluminum plastic film for tab, to solve the breakage problem of tab.
Lithium ion battery of the invention the preparation method is as follows:
In the side of negative current collector, cathode pole piece is made in coating active material, coats activity in the two sides of plus plate current-collecting body
Anode pole piece is made in substance；Copper foil or lithium piece can be used in negative current collector, and aluminium foil can be used in plus plate current-collecting body；
Pole piece obtained is cut by process specification, and welds upper tab；
Anode pole piece, diaphragm, cathode pole piece are successively stacked, and rubberizing is fixed, winding forms battery core；
Battery core is precuted out to the protruded length of tab；
Battery core is packaged using aluminum plastic film, and the side ipsilateral with tab of aluminum plastic film is made to extend beyond battery core, and
The length that aluminum plastic film extends is at least the half of tab protruded length；
In the surface patch hot melt double-sided adhesive or spray high viscosity resins opposite with aluminum plastic film of tab, tab is pressed together on aluminium
On plastic film, tab is flattened to the preparation of completion battery after shaping.
The present invention lengthens the aluminum plastic film of packaging electric core, keeps aluminum plastic film and the ipsilateral side of tab overhanging beyond pole
Then the exposed parts fitting of tab is fixed on aluminum plastic film extended segment, is increased the intensity of tab using aluminum plastic film by ear, thus
Tab is prevented to be broken off.
Further, aluminum plastic film conducting tab short circuit in order to prevent, can be on the section of its side after cutting aluminum plastic film
Patch high-temp glue or spray insulation resin are for insulating.
In addition, in order to avoid short circuit occurs for aluminum plastic film conducting tab, it is preferred that the side ipsilateral with tab of aluminum plastic film can
The edge of tab is extended beyond, tab pressing is then closely attached on aluminum plastic film (Fig. 2) again.
The preparation method of ultra-thin lithium cell of the invention is described in detail with a specific embodiment below.
The size of battery core prepared by the present embodiment are as follows: length≤25.0mm, width≤35.0mm, thickness≤0.40mm；
Step 1 is coated the two-sided of plus plate current-collecting body, is coated to the single side of negative current collector, routinely work
Skill is toasted, after roll-in, is coiled strip by the cutting of specification requirement width；
Step 2, with laser cleaning technique, the coating in coiled strip tab region is washed, keeps sky foil exposed with soldering polar ear,
Cleaning is having a size of 3.0*4.0mm；
Step 3, the mode chip cut to pole piece with punch die, anode pole piece punching are born having a size of 26.5*21.0mm
Pole pole piece is punched size are as follows: 55.0*22.0mm；Aluminium/nickel tab that 0.010*2.0*15.0mm is welded after pole piece cutting, to welding
The protection of tab position sky foil rubberizing paper；
Cathode pole piece and diaphragm are folded along middle line, it is inside that cathode applies cream, by diaphragm case on anode pole piece, then outside
Cathode pole piece is put on again, and rubberizing is fixed, winding forms battery core；
Step 4 cuts positive and negative electrode tab by specification, and cutting rear tab length is 4.5 ± 0.5mm；
Step 5, with aluminum plastic film packaging electric core, and after ensuring battery core encapsulation, a side of aluminum plastic film extends beyond tab top
End；
Step 6 pastes hot melt double-sided adhesive on the tab surface opposite with aluminum plastic film, and tab rubberizing face is pressed together on aluminium
On plastic film, be then embedded in tab in thermoplastic by way of hot pressing, abutting be fixed on aluminum plastic film, be prepared at
Product battery core is as shown in Figure 2.
Previous embodiment specially reserves one section of aluminum plastic film more than tab when packaging electric core, cutting aluminum plastic film, so as to
Tab abutting to be fixed on aluminum plastic film, to increase the intensity of tab, other steps and traditional handicraft phase of the method for the present invention
Together.The tab for the battery core being prepared using the method for the present invention is increased intensity, quilt is not present due to obtaining the support of aluminum plastic film
The phenomenon that fractureing, and there is no the problems that lug bending short circuit occurs.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to embodiment illustrated herein, and is to fit to consistent with the principles and novel features disclosed in this article
Widest range.
Claims (5)
1. a kind of lithium ion battery, comprising:
The battery core that winding is formed is stacked by anode pole piece, diaphragm and cathode pole piece；
The tab being welded on pole piece；
Encapsulate the aluminum plastic film of the battery core；
It is characterized by: the side ipsilateral with tab of the aluminum plastic film extends beyond the edge of tab, the tab pressing patch
Tightly on the aluminum plastic film.
2. lithium ion battery according to claim 1, it is characterised in that: be provided with height on the section of the aluminum plastic film side
Warm glue-line or insulating resin layer.
3. the preparation method of lithium ion battery, which comprises the following steps:
Active material is respectively coated on plus plate current-collecting body and negative current collector, anode pole piece and cathode pole piece is made；
Pole piece obtained is cut by process specification, and welds upper tab；
Anode pole piece, diaphragm, cathode pole piece are successively stacked, and rubberizing is fixed, winding forms battery core；
Battery core is precuted out to the protruded length of tab；
Battery core is packaged using aluminum plastic film, and the side ipsilateral with tab of aluminum plastic film is made to extend beyond the edge of tab；
Tab is pressed on aluminum plastic film, the preparation of completion battery after shaping is flattened.
4. the preparation method of lithium ion battery according to claim 3, it is characterised in that: the tab and aluminum plastic film
Tab is pressed together on aluminum plastic film after opposite surface patch hot melt double-sided adhesive or spray high viscosity resins.
5. the preparation method of lithium ion battery according to claim 3, it is characterised in that: the side after aluminum plastic film is cut
Section on paste high-temp glue or spray insulation resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790523.5A CN105406107B (en) | 2015-11-16 | 2015-11-16 | A kind of lithium ion battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790523.5A CN105406107B (en) | 2015-11-16 | 2015-11-16 | A kind of lithium ion battery and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105406107A CN105406107A (en) | 2016-03-16 |
| CN105406107B true CN105406107B (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510790523.5A Active CN105406107B (en) | 2015-11-16 | 2015-11-16 | A kind of lithium ion battery and preparation method thereof |
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| CN (1) | CN105406107B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818066A (en) * | 2017-11-19 | 2019-05-28 | 深圳格林德能源集团有限公司 | A kind of novel power battery preparation method |
| CN109659628A (en) * | 2019-01-28 | 2019-04-19 | 新余赣锋电子有限公司 | A kind of the smelting tool and method of soft pack cell edge sealing |
| CN111618588A (en) * | 2020-06-01 | 2020-09-04 | 江西优特汽车技术有限公司 | Method for welding tab of soft-packaged battery cell |
| CN114204220B (en) * | 2020-08-31 | 2023-04-07 | 比亚迪股份有限公司 | Battery cell, battery and battery pack |
| CN114122531A (en) * | 2021-11-29 | 2022-03-01 | 珠海冠宇电池股份有限公司 | Lithium ion battery |
| CN115621580B (en) * | 2022-07-07 | 2023-08-18 | 荣耀终端有限公司 | Battery cell |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006035414A1 (en) * | 2006-11-08 | 2008-05-15 | Dilo Trading Ag | Improved winding-cell lithium-ion battery with arrester fuses or contacts embedded in plastic |
| CN201084764Y (en) * | 2007-07-30 | 2008-07-09 | 比亚迪股份有限公司 | A soft-packed battery |
| CN201754421U (en) * | 2010-03-15 | 2011-03-02 | 陈性保 | Ultra-thin lithium ion polymer battery |
| CN205248389U (en) * | 2015-11-16 | 2016-05-18 | 珠海光宇电池有限公司 | Lithium ion battery |
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| CN105406107A (en) | 2016-03-16 |
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Address after: 519180 Guangdong Province, Zhuhai city Doumen District Xinqing Technology Industrial Park Mount Everest Road No. nine Patentee after: Zhuhai Guanyu Battery Co.,Ltd. Address before: 519180 Guangdong Province, Zhuhai city Doumen District Xinqing Technology Industrial Park Mount Everest Road No. nine Patentee before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. Address after: 519180 Guangdong Province, Zhuhai city Doumen District Xinqing Technology Industrial Park Mount Everest Road No. nine Patentee after: ZHUHAI COSLIGHT BATTERY Co.,Ltd. Address before: 519180 Guangdong Province, Zhuhai city Doumen District Xinqing Technology Industrial Park Mount Everest Road No. nine Patentee before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
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