CN102683752A - Stacked lithium ion power battery and manufacturing method thereof - Google Patents
Stacked lithium ion power battery and manufacturing method thereof Download PDFInfo
- Publication number
- CN102683752A CN102683752A CN2012101001977A CN201210100197A CN102683752A CN 102683752 A CN102683752 A CN 102683752A CN 2012101001977 A CN2012101001977 A CN 2012101001977A CN 201210100197 A CN201210100197 A CN 201210100197A CN 102683752 A CN102683752 A CN 102683752A
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- China
- Prior art keywords
- strip
- pole piece
- barrier film
- positive
- negative
- Prior art date
- 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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- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229910001416 lithium ion Inorganic materials 0.000 title abstract description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title abstract description 9
- 230000004888 barrier function Effects 0.000 claims description 48
- 238000003475 lamination Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000011149 active material Substances 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
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
The electric vehicle lithium-ion-power cell generally adopts stacked structure because of bigger area of dissipation of needs and the capacity of Geng Gao.Stacked structure is generally negative plate, barrier film, positive plate being formed by stacking from level to level.For present stacked preparation method; Need at first the electrode plates of processing to be cut into plurality of small blocks according to the finished product battery size; Stack according to the sequential loop of anode pole piece-barrier film-cathode pole piece-barrier film after cutting finishes, operation is loaded down with trivial details again, and pole piece burr diaphragm etc. has taken place causes 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 objective of the invention is provides a kind of production technology simple in order to solve the shortcoming of above-mentioned battery lamination manufacture method, active material difficult drop-off, and high lithium-ion-power cell and the preparation method of security performance.
For realizing above-mentioned purpose, 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; Be provided with crease is all arranged with sticking strip anode pole piece and the pole piece both sides barrier film put in even interval on the first strip barrier film; Be provided with crease is all arranged with sticking strip cathode pole piece and the pole piece both sides barrier film put in even interval on the second strip barrier film; The width of strip anode pole piece and strip cathode pole piece is identical and all be slightly less than at interval; The sticking strip cathode pole piece second strip barrier film of putting is covered on the pole piece interval of the first strip barrier film; V-type is folding at the crease place continuously, and is promptly folding to the in turn continuous V-type of the positive/negative plate of homalographic, up to the thickness that reaches battery.The strip anode pole piece is drawn anode electrode at an end of length direction, and the strip cathode pole piece is drawn negative electrode at the other end of length direction.
V-type is folding continuously, and through the electric core of hot-forming formation, folding face is a rectangle.Positive/negative plate all has been that one side is covered with the electrode of metal forming at least, and complete structure also is included in the cuboid shell and fills electric core, and draw both positive and negative polarity and the liquid that charges after electrification become, constitute battery.
A kind of manufacturing approach of lithium-ion-power cell of continuous lamination; May further comprise the steps: according to designing requirement, make the pole piece of strip polarity, earlier barrier film is processed strip; Will be suitable with the barrier film width, the pole piece of the positive polarity that width is narrow slightly is adhered on the barrier film according to same intervals; Be provided with crease is all arranged with sticking strip cathode pole piece and the pole piece both sides barrier film put in even interval on the second strip barrier film; The width of strip anode pole piece and strip cathode pole piece is identical and all be slightly less than at interval; The sticking strip cathode pole piece second strip barrier film of putting is covered on the pole piece interval of the first strip barrier film; V-type is folding at the crease place continuously, by " V " font folding N time continuously (6-20 time commonly used, as ten times).Formation intersects according to the mode of negative pole-barrier film-positive pole-barrier film and stacks, and forms the layer stack that the positive/negative plate that separates with barrier film replaces.Hot-forming, go out positive and negative lug respectively with pressing equipment, wherein positive plate and negative plate comprise the layer of 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 cell structure; Have bigger area of dissipation and the capacity of Geng Gao easily; Can not producing stacked structure cuts, sequential loop, to stack the operation that causes loaded down with trivial details; Pole piece burr diaphragm etc. can not take place cause membrane ruptures, positive/negative plate connects and the phenomenon that is short-circuited has improved security performance.Production technology of the present invention is simple, the active material difficult drop-off, and security performance is high. and main preparation technology's good reproducibility is not prone to positive/negative plate and connects short circuit phenomenon; Simplified production process greatly; Reduce production costs; Effectively enhance productivity.
Description of drawings
Fig. 1 carries out the folding sketch map in heaps of " Z " font for pole piece diaphragm strip band.The sketch map of a certain polarity pole piece of strip.
Fig. 2 is a lithium ion battery charge-discharge performance curve.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done detailed explanation: the lamination manufacture craft of selecting lithium iron phosphate dynamic battery electricity core for use comes the present invention is done detailed explanation as embodiment.The processing step of present embodiment is following:
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 that are, wide is 20-60mm.The embodiment of the invention is of a size of 40*49mm, makes the positive and negative plate of strip 40*49mm (or other sizes) earlier.Concrete preparation method is: on barrier film 3, adopt printing with tangential knife the barrier film tangent line to be formed crease; Negative plate 1 is made up of negative current collector and the reactive coating coat that is evenly coated in the two sides.Positive plate 2 is made up of plus plate current-collecting body and the reactive coating coat that is evenly coated in the two sides.Require barrier film 3 is processed the as shown in the figure of 40*500mm (or longer) according to above-mentioned steps.
The making of B, pole piece barrier film band:
With prepare the sticking barrier film relevant position that places of positive and negative plate, form positive and negative plate continuous equally distributed diaphragm strip on barrier film.
C, pole piece stack, and be as shown in the figure:
Be provided with crease is all arranged with sticking strip cathode pole piece and the pole piece both sides barrier film put in even interval on the second strip barrier film; The width of strip anode pole piece and strip cathode pole piece is identical and all be slightly less than at interval; The sticking strip cathode pole piece second strip barrier film of putting is covered on the pole piece interval of the first strip barrier film; V-type is folding at the crease place continuously, the folded stack that the positive/negative plate that formation separates with barrier film replaces.
D, moulding are made
Positive/negative plate all has been that one side is covered with the electrode of metal forming at least, and positive plate is covered with metal forming and stretches out in an end, and negative plate is covered with the other end that metal forming stretches out in pole piece.The folded stack that will replace with the positive/negative plate that barrier film separates is hot-forming, with pressing equipment go out respectively positive and negative lug connect stretch out a certain end metal forming as electrode.The present invention is when 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 electric core, and electric core refills shell, and welding is annotated electrolyte and also sealed, changes into, and flexible package shaping like this obtains the finished product lithium ion battery at last.
E, properties of product test
Lithium iron phosphate dynamic battery provided by the invention uses the back performance following: the high energy of discharge capacity reaches 37.313Ah behind this lithium ion battery constant current charge; Discharge capacity is 28.941Ah after 2390 cycle charge-discharges, explains that this lithium ion battery has good high rate performance and cycle performance.Battery charging voltage fluctuates at 3.5V, and constant current is filled volume percent mean value and is about 96.462%, and voltage is stabilized in about 3V during the 200A constant-current discharge; Voltage is stabilized in about 3.1V during the 140A constant-current discharge; Voltage is stabilized in about 3.3V during the 40A constant-current discharge, and is as shown in Figure 2, shows this lithium ion battery charge-discharge performance safety and stability.
The present invention has fundamentally solved among traditional lamination preparation technology because of the positive/negative plate contact; The short circuit problem that pole piece burrs on edges diaphragm causes; Improve battery quality, improved the folding mode of existing barrier film, greatly reduced material cost and complex process degree.
Above-described case study on implementation only is that the preferred embodiments of the invention are described; Be not that scope of the present invention is limited; Do not breaking away under the prerequisite that the present invention relates to spirit, various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection range of claims of the present invention.
Claims (4)
1. the lithium-ion-power cell of a continuous lamination is characterized in that structure is following: comprise barrier film, anode pole piece, cathode pole piece, positive pole and negative electrode, electric liquid and shell; Be provided with crease is all arranged with sticking strip anode pole piece and the pole piece both sides barrier film put in even interval on the first strip barrier film; Be provided with crease is all arranged with sticking strip cathode pole piece and the pole piece both sides barrier film put in even interval on the second strip barrier film; The width of strip anode pole piece and strip cathode pole piece is identical and all be slightly less than at interval; The sticking strip cathode pole piece second strip barrier film of putting is covered on the pole piece interval of the first strip barrier film; V-type is folding at the crease place continuously, and is promptly folding to the in turn continuous V-type of the positive/negative plate of homalographic, up to the thickness that reaches battery; The strip anode pole piece is drawn anode electrode at an end of length direction, and the strip cathode pole piece is drawn negative electrode at the other end of length direction; V-type is folding continuously, and through the electric core of hot-forming formation, folding face is a rectangle; Positive and negative plate all is that one side is covered with the electrode of metal forming at least, fills electric core at the cuboid shell, and draw both positive and negative polarity and the liquid that charges after constitute battery.
2. the lithium-ion-power cell of continuous lamination according to claim 1, the area size that it is characterized in that anode pole piece, cathode pole piece are the long 30-150mm that is, wide is 20-60mm.
3. the manufacturing approach of the lithium-ion-power cell of a continuous lamination; It is characterized in that may further comprise the steps: make strip positive pole and cathode pole piece; Earlier barrier film is processed strip, will be suitable with the barrier film width, the narrow slightly anode pole piece of width is adhered on the barrier film according to same intervals; Be provided with crease is all arranged with sticking strip cathode pole piece and the pole piece both sides barrier film put in even interval on the second strip barrier film; The width of strip anode pole piece and strip cathode pole piece is identical and all be slightly less than at interval; The sticking strip cathode pole piece second strip barrier film of putting is covered on the pole piece interval of the first strip barrier film; V-type is folding at the crease place continuously, folds 6-20 time continuously by " V " font; Formation intersects according to the mode of negative pole-barrier film-positive pole-barrier film and stacks, and forms the layer stack that the positive/negative plate that separates with barrier film replaces; Hot-forming, go out positive and negative lug respectively with pressing equipment; Positive/negative plate all has been that one side is covered with the electrode of metal forming at least, and positive plate is covered with metal forming and stretches out in an end, and negative plate is covered with the other end that metal forming stretches out in pole piece, connects corresponding positive and negative lug.
4. the manufacturing approach of the lithium-ion-power cell of continuous lamination according to claim 3 is characterized in that on barrier film, adopting printing with tangential knife the barrier film tangent line to be formed crease; Negative plate is made up of negative current collector and the reactive coating coat that is evenly coated in the two sides.
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 |
|---|---|---|---|
| CN201210100197.7A CN102683752B (en) | 2012-04-09 | 2012-04-09 | Stacked lithium ion power battery and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102683752A true CN102683752A (en) | 2012-09-19 |
| CN102683752B CN102683752B (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210100197.7A Active CN102683752B (en) | 2012-04-09 | 2012-04-09 | Stacked lithium ion power battery and manufacturing method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051793A (en) * | 2014-07-03 | 2014-09-17 | 宁德新能源科技有限公司 | Preparation method of lamination battery 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 |
| CN108461820A (en) * | 2018-02-08 | 2018-08-28 | 宜昌力佳科技有限公司 | A kind of high current li-Mn 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 |
| CN109546230A (en) * | 2017-12-29 | 2019-03-29 | 蜂巢能源科技有限公司 | The manufacturing method and electrode tinkertoy module of electrode tinkertoy module |
| 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 |
| 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 |
| CN110571472A (en) * | 2019-08-21 | 2019-12-13 | 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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| 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
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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 |
| US20100015529A1 (en) * | 2006-05-15 | 2010-01-21 | Lg Chem, Ltd. | Electrolyte assembly for secondary battery of novel laminated structure |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051793A (en) * | 2014-07-03 | 2014-09-17 | 宁德新能源科技有限公司 | Preparation method of lamination battery cell |
| 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 |
| CN109546230A (en) * | 2017-12-29 | 2019-03-29 | 蜂巢能源科技有限公司 | The manufacturing method and electrode tinkertoy module of electrode tinkertoy module |
| 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 |
| CN108461820A (en) * | 2018-02-08 | 2018-08-28 | 宜昌力佳科技有限公司 | A kind of high current li-Mn button cell and preparation method thereof |
| 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 |
| CN110571472A (en) * | 2019-08-21 | 2019-12-13 | 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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| CN102683752B (en) | 2014-08-27 |
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Owner name: LASTING BRILLIANCE NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: NANJING LASTING BRILLIANCE NEW ENERGY TECH., LTD. Effective date: 20130422 |
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Effective date of registration: 20130422 Address after: The middle 250000 Shandong province Chunhui road Ji'nan high tech Zone Applicant after: Lasting Brilliance New Energy Technology Co., Ltd. Applicant after: Nanjing University of Technology Address before: 210000, J3 building, 15 Wanshou Road hi tech Industrial Park, Pukou District, Jiangsu, Nanjing, China Applicant before: Nanjing Lasting Brilliance New Energy Technology Co., Ltd. Applicant before: Nanjing University of Technology |
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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. |