CN102683752B - Stacked lithium ion power battery and manufacturing method thereof - Google Patents
Stacked lithium ion power battery and manufacturing method thereof Download PDFInfo
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- CN102683752B CN102683752B CN201210100197.7A CN201210100197A CN102683752B CN 102683752 B CN102683752 B CN 102683752B CN 201210100197 A CN201210100197 A CN 201210100197A CN 102683752 B CN102683752 B CN 102683752B
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- strip
- pole piece
- barrier film
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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
Abstract
The invention discloses a lithium ion power battery with a continuous stacked structure. The lithium ion power battery comprises diaphragms, positive plates, negative plates, a cathode, an anode, electrolyte and a cuboidal housing. The strip-type positive plates are adhered to a first strip-type diaphragm at a uniform interval, and a crease is formed in the diaphragm on the two sides of each plate. The strip-type negative plates are adhered to a second strip-type diaphragm at a uniform interval, and a crease is formed in the diaphragm on the two sides of each plate. The widths of the strip-type positive plates and the strip-type negative plates are the same and slightly smaller than the interval. The second strip-type diaphragm to which the strip-type negative plates are adhered covers the plate intervals of the first strip-type diaphragm, and is continuously folded at the creases to form a V shape, namely the positive and negative plates with the same area are sequentially and continuously folded to form the V shape until the thickness of the battery is obtained. A battery core is filled to the cuboidal housing, the cathode and the anode are led out, and the electrolyte is filled to form the battery.
Description
Technical field
The present invention relates to a kind of technology of preparing of lithium ion battery, relate in particular to a kind of laminated Li-ion electrokinetic cell and preparation method thereof.
Background technology
Electric vehicle lithium-ion-power cell, because of the capacity of the larger area of dissipation of needs and Geng Gao, generally adopts stacked structure.Stacked structure is generally negative plate, barrier film, positive plate being formed by stacking from level to level.For current stacked preparation method, need to first the electrode plates of making be cut into some fritters according to finished product battery size, after cutting, the sequential loop according to anode pole piece-barrier film-cathode pole piece-barrier film stacks again, operation is loaded down with trivial details, and there is pole piece burr and pierce through barrier film etc. and cause membrane ruptures, positive/negative plate connects and the phenomenon that is short-circuited, and has reduced the security performance of battery.
Summary of the invention
The object of the invention is the shortcoming in order to solve above-mentioned battery lamination manufacture method, provide a kind of production technology simple, active material difficult drop-off, and high lithium-ion-power cell and the preparation method of security performance.
For achieving the above object, the present invention has adopted following technical scheme: a kind of lithium-ion-power cell of continuous lamination, comprises barrier film, anode pole piece, cathode pole piece, positive pole and negative electrode, electric liquid and shell; On the first strip barrier film, be provided with and all have crease with sticky strip anode pole piece and the pole piece both sides barrier film put in even interval, on the second strip barrier film, be provided with and all have crease with sticky strip cathode pole piece and the pole piece both sides barrier film put in even interval, the width of strip anode pole piece and strip cathode pole piece is identical and be all slightly less than interval, put strip cathode pole piece the second strip barrier film and cover on the pole piece interval of the first strip barrier film sticky, folding in crease place V-type continuously, to the positive/negative plate of homalographic, in turn continuous V-shaped is folding, until reach the thickness of battery.Strip anode pole piece is drawn anode electrode in one end of length direction, and strip cathode pole piece is drawn negative electrode at the other end of length direction.
Continuous V-shaped is folding, and through hot-forming formation battery core, folding face is rectangle.Positive/negative plate has been all that at least one side is covered with the electrode of metal forming, and complete structure is also included in cuboid shell and fills battery core, and draw both positive and negative polarity and the liquid that charges after electrification become, form battery.
A kind of manufacture method of lithium-ion-power cell of continuous lamination, comprise the following steps: according to designing requirement, make the pole piece of strip polarity, first barrier film is made to strip, will be suitable with barrier film width, the pole piece of the slightly narrow positive polarity of width is adhered on barrier film according to same intervals; On the second strip barrier film, be provided with and all have crease with sticky strip cathode pole piece and the pole piece both sides barrier film put in even interval, the width of strip anode pole piece and strip cathode pole piece is identical and be all slightly less than interval, put strip cathode pole piece the second strip barrier film and cover on the pole piece interval of the first strip barrier film sticky, folding in crease place V-type continuously, by " V " font folding N time continuously (6-20 time conventional, as ten times).Form and intersect and stack according to the mode of negative pole-barrier film-positive pole-barrier film, the stacked heap that the positive/negative plate that formation separates with barrier film replaces.Hot-forming, go out respectively positive and negative lug with pressing equipment, wherein positive plate and negative plate comprise one deck active coating through special processing.
The invention has the beneficial effects as follows: battery structure is simple; Especially be applied to electric vehicle lithium-ion power battery structure, easily there is larger area of dissipation and the capacity of Geng Gao, can not produce stacked structure cuts, that sequential loop stacks the operation causing is loaded down with trivial details, pole piece burr can not occur to be pierced through barrier film etc. and causes membrane ruptures, positive/negative plate connect and the phenomenon that is short-circuited has improved security performance.Production technology of the present invention is simple, active material difficult drop-off, and security performance is high. and main preparation technology's is reproducible, is not prone to positive/negative plate and connects short circuit phenomenon; Greatly simplify production process; Reduce production costs; Effectively enhance productivity.
Brief description of the drawings
Fig. 1 is that pole piece diaphragm strip band carries out the folding schematic diagram in heaps of " Z " font.The schematic diagram of a certain polarity pole piece of strip.
Fig. 2 is lithium ion battery charge-discharge performance curve.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail: select the lamination manufacture craft of lithium iron phosphate dynamic battery battery core as embodiment, the present invention is described in detail.The processing step of the present embodiment is as follows:
The making of A, pole piece and barrier film is as shown in Figure 1:
According to designing requirement, the area size of anode pole piece 1, cathode pole piece 2 is the long 30-150mm of being, wide is 20-60mm.The embodiment of the present invention is of a size of 40*49mm, first makes the positive and negative plate of strip 40*49mm (or other sizes).Concrete preparation method is: on barrier film 3, adopt printing tangential knife to form crease to barrier film tangent line; Negative plate 1 is made up of negative current collector and the reactive coating coat that is evenly coated in two sides.Positive plate 2 is made up of plus plate current-collecting body and the reactive coating coat that is evenly coated in two sides.Require barrier film 3 to make 40*500mm(or longer according to above-mentioned steps) as shown in the figure.
The making of B, pole piece barrier film band:
By prepare the sticky barrier film relevant position that is placed in of positive and negative plate, form the positive and negative plate diaphragm strip that continuous uniform distributes on barrier film.
C, pole piece stack, as shown in the figure:
On the second strip barrier film, be provided with and all have crease with sticky strip cathode pole piece and the pole piece both sides barrier film put in even interval, the width of strip anode pole piece and strip cathode pole piece is identical and be all slightly less than interval, put strip cathode pole piece the second strip barrier film and cover on the pole piece interval of the first strip barrier film sticky, folding in crease place V-type continuously, the folded stack that the positive/negative plate that formation separates with barrier film replaces.
D, moulding are made
Positive/negative plate has been all that at least one side is covered with the electrode of metal forming, and positive plate is covered with metal forming and stretches out in one end, and negative plate is covered with metal forming and stretches out in the other end of pole piece.The folded stack that the positive/negative plate separating with barrier film is replaced is hot-forming, goes out respectively positive and negative lug connect the metal forming of stretching out certain one end as electrode with pressing equipment.The present invention is in the time carrying out the making of first step, and the folded stack that the positive/negative plate that formation separates with barrier film replaces is as battery core, and battery core refills shell, welding, and note electrolyte also seals, changes into, and flexible package shaping like this, finally obtains finished product lithium ion battery.
E, properties of product test
After lithium iron phosphate dynamic battery provided by the invention uses, performance is as follows: after this lithium ion battery constant current charge, the high energy of discharge capacity reaches 37.313Ah, after 2390 cycle charge-discharges, discharge capacity is 28.941Ah, illustrates that this lithium ion battery has good high rate performance and cycle performance.Battery charging voltage fluctuates at 3.5V, and when constant current is filled volume percent mean value and is about 96.462%, 200A constant-current discharge, voltage stabilization is in 3V left and right; When 140A constant-current discharge, voltage stabilization is in 3.1V left and right; When 40A constant-current discharge, voltage stabilization, in 3.3V left and right, as shown in Figure 2, shows this lithium ion battery charge-discharge performance safety and stability.
The present invention has fundamentally solved in traditional lamination preparation technology because of positive/negative plate contact, pole piece burrs on edges pierces through the short circuit problem that barrier film causes, improve battery quality, improved existing septate folding mode, greatly reduced material cost and complex process degree.
Above-described case study on implementation is only that the preferred embodiments of the invention are described; not scope of the present invention is limited; do not departing under the prerequisite that the present invention relates to spirit, the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement all should fall in the definite protection range of the claims in the present invention book.
Claims (1)
1. a manufacture method for the lithium-ion-power cell of continuous lamination, lithium-ion-power cell comprises barrier film, anode pole piece, cathode pole piece, positive pole ear and negative lug, electrolyte and shell, it is characterized in that comprising the following steps: make strip anode pole piece and strip cathode pole piece, first barrier film is made to strip, on the first strip barrier film, all there is crease with sticky the putting on strip anode pole piece and pole piece both sides barrier film in even interval, on the second strip barrier film, all there is crease with sticky the putting on strip cathode pole piece and pole piece both sides barrier film in even interval, the width of strip anode pole piece and strip cathode pole piece is identical and be all slightly less than interval, the sticky strip cathode pole piece of putting on the second strip barrier film is covered on the pole piece interval of the first strip barrier film, fold 6-20 time in crease place V-type continuously, form and intersect and stack according to the mode of cathode pole piece-barrier film-anode pole piece-barrier film, the stacked heap that the positive/negative plate separating with barrier film replaces, hot-forming, go out respectively positive and negative lug with pressing equipment, positive/negative plate has been all that one side is covered with the electrode of metal forming, and positive plate is covered with metal forming and stretches out in one end of pole piece, and negative plate is covered with metal forming and stretches out in the other end of pole piece, connects corresponding positive and negative lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210100197.7A CN102683752B (en) | 2012-04-09 | 2012-04-09 | Stacked lithium ion power battery and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210100197.7A CN102683752B (en) | 2012-04-09 | 2012-04-09 | Stacked lithium ion power battery and manufacturing method thereof |
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| CN102683752A CN102683752A (en) | 2012-09-19 |
| CN102683752B true CN102683752B (en) | 2014-08-27 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051793B (en) * | 2014-07-03 | 2016-01-06 | 宁德新能源科技有限公司 | The preparation method of laminated cell |
| CN106252732A (en) * | 2016-08-17 | 2016-12-21 | 吉安市优特利科技有限公司 | The manufacture method of lithium-ion-power cell |
| CN109560322A (en) * | 2017-12-29 | 2019-04-02 | 蜂巢能源科技有限公司 | The manufacturing method and electrode tinkertoy module of electrode tinkertoy module |
| CN109546230B (en) * | 2017-12-29 | 2022-03-29 | 蜂巢能源科技股份有限公司 | Method for manufacturing electrode laminated assembly and electrode laminated assembly |
| CN108461820B (en) * | 2018-02-08 | 2024-01-19 | 宜昌力佳科技有限公司 | High-current lithium-manganese button cell and preparation method thereof |
| CN109301349A (en) * | 2018-09-12 | 2019-02-01 | 深圳市海目星激光智能装备股份有限公司 | A kind of lamination process and lamination device |
| CN109599589A (en) * | 2018-12-12 | 2019-04-09 | 河北银隆新能源有限公司 | Battery core method for making and battery |
| CN110571472B (en) * | 2019-08-21 | 2023-03-21 | 温州大学新材料与产业技术研究院 | Electrode core body of flexible battery and preparation method and application thereof |
| CN114824661A (en) * | 2022-05-11 | 2022-07-29 | 上海兰钧新能源科技有限公司 | Naked electric core and battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11260673A (en) * | 1998-03-16 | 1999-09-24 | Kansai Coke & Chem Co Ltd | Electrode laminate for electric double layer capacitor |
| CN1591959A (en) * | 2003-09-01 | 2005-03-09 | 比亚迪股份有限公司 | Laminated lithium ion secondary cell |
| KR100907623B1 (en) * | 2006-05-15 | 2009-07-15 | 주식회사 엘지화학 | Electrolyte Assembly for Secondary Battery of Novel Laminated Structure |
| CN101783420A (en) * | 2009-05-05 | 2010-07-21 | 深圳市雄韬电源科技有限公司 | Method for manufacturing lithium ion battery lamination |
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2012
- 2012-04-09 CN CN201210100197.7A patent/CN102683752B/en active Active
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| JP特开平11-260673A 1999.09.24 |
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Address after: The middle 250000 Shandong province Chunhui road Ji'nan high tech Zone Co-patentee after: Nanjing University of Technology Patentee after: Long trillion new energy Polytron Technologies Inc Address before: The middle 250000 Shandong province Chunhui road Ji'nan high tech Zone Co-patentee before: Nanjing University of Technology Patentee before: Lasting Brilliance New Energy Technology Co., Ltd. |
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