CN101944639A - Cutting-free laminated preparation method of lithium ion battery cell - Google Patents
Cutting-free laminated preparation method of lithium ion battery cell Download PDFInfo
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- CN101944639A CN101944639A CN2010102620744A CN201010262074A CN101944639A CN 101944639 A CN101944639 A CN 101944639A CN 2010102620744 A CN2010102620744 A CN 2010102620744A CN 201010262074 A CN201010262074 A CN 201010262074A CN 101944639 A CN101944639 A CN 101944639A
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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
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- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a cutting-free laminated preparation method of a lithium ion battery cell, which is characterized by comprising the following steps: (1) using a polymer diaphragm as the substrate, alternately coating positive pole active material and negative pole active material on one or both sides of the substrate to respectively form positive pole plate regions and negative pole plate regions, and reserving a clearance between the positive pole plate region and the adjacent negative pole plate region in an adjacent condition as the diaphragm region; (2) and directly and alternately folding the dividing line between the positive pole plate region and the diaphragm region, and the dividing line between the negative pole plate region and the diaphragm region on the substrate to form the cell of which the unit stacking sequence is the positive pole plate, the diaphragm, the negative pole plate and the diaphragm. Since the pole plate does not need to be cut in the preparation process of the lithium ion battery cell, the method can greatly simplify the production procedure, lower the production cost and effectively enhance the production efficiency.
Description
Technical field
The present invention relates to a kind of method for making electric core of lithium ion battery, especially a kind of lithium ion battery cell exempts to cut stacked preparation method.
Background technology
Lithium ion battery cell mainly is made up of anode pole piece, cathode pole piece and barrier film, anode pole piece is usually by forming as the aluminium foil of substrate and the active material that is coated in aluminium foil surface, cathode pole piece is then by forming as the Copper Foil of substrate and the material with carbon element that is coated in copper foil surface, barrier film is exactly common membrane for polymer, generally is PP or PE membrane for polymer.One of main preparation methods of lithium ion battery cell is to adopt stacked preparation method at present, for stacked preparation method, need at first the electrode plates of making to be cut into plurality of small blocks according to the finished product battery size, after finishing, cutting stacks according to the circulation of the sequence of unit of anode pole piece 2, barrier film 4, cathode pole piece 3, barrier film 4 again, link to each other by lug again between the different electrode plates, thereby be prepared from, it makes structure as shown in Figure 1.This preparation method need cut the both positive and negative polarity pole piece, and operation is loaded down with trivial details, is not suitable for the large-scale production of capacity type lithium ion battery.
Summary of the invention
The present invention seeks to: provide a kind of lithium ion battery cell to exempt to cut stacked preparation method, this method need not electrode plates is cut in the process of preparation battery battery core, can simplify production process greatly, reduce production costs, effectively enhance productivity.
Technical scheme of the present invention is: a kind of lithium ion battery cell exempts to cut stacked preparation method, it is characterized in that comprising the steps:
1) with membrane for polymer as substrate, single face or two-sided positive electrode active materials and the negative active core-shell material of alternately being coated with in substrate, form anode pole piece zone and cathode pole piece zone respectively, and between adjacent anode pole piece zone and cathode pole piece zone, leave certain interval as diaphragm area;
2) directly with substrate along separator bar between anode pole piece zone and the diaphragm area and the separator bar alternate folding between cathode pole piece zone and the diaphragm area, forming with anode pole piece, barrier film, cathode pole piece, barrier film is the electric core that the unit stacks order.
Size needs according to the finished product lithium ion battery, the inventive method is in the process of actual fabrication electricity core, length and width to anode pole piece zone, diaphragm area and cathode pole piece zone all can be adjusted, for example according to the needs of follow-up folding process, each regional width can be identical, also can be different.Certainly the length that preferred scheme is described anode pole piece zone, diaphragm area and cathode pole piece zone among the present invention is the width of substrate, and the width in anode pole piece zone, diaphragm area and cathode pole piece zone is all identical.
Substrate among the present invention is made by the membrane for polymer of routine, and described membrane for polymer can be the PP barrier film, also can be the PE barrier film, also can be the PP or the PE barrier film of modification, and the preparation method of these barrier films all is technology well-known to those skilled in the art.
Coat suprabasil positive electrode active materials and negative active core-shell material among the present invention and be the known technology in lithium ion battery manufacturing field, for example positive electrode is LiFePO
4, LiCoO
2The perhaps mixed slurry of spinelle and conductive agent and binding agent, negative material then are material with carbon element, silicon materials or tin material and the necessary conductive agent and the mixed slurry of binding agent.
By the electric core that the inventive method is made, finally equally place in the housing and inject electrolyte and make the finished product battery with routine techniques.Certainly specifically also will be according to the specification of finished product battery, the element number that decision stacks in proper order according to anode pole piece, barrier film, cathode pole piece, barrier film.
Advantage of the present invention is:
Method provided by the invention need not electrode plates is cut in the process of preparation lithium ion battery cell, after only needing in the substrate of making, alternately to be coated with anode and cathode active materials by membrane for polymer, directly fold just and can make electric core, can simplify production process greatly compared to existing technology, reduce production costs, effectively enhance productivity.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is the stacked battery battery core structural representation for preparing of tradition;
Fig. 2 alternately is coated with the perspective view of electrode material in substrate for the present invention;
Fig. 3 alternately is coated with the planar structure schematic diagram of electrode material in substrate for the present invention;
Fig. 4 is the structural representation after the present invention folds substrate.
Wherein: 1, substrate; 2, anode pole piece; 3, cathode pole piece; 4, barrier film.
Embodiment
Embodiment: the preparation method of existing lithium ion battery cell mainly adopts stacked preparation method, for stacked preparation method, need at first the electrode plates of making to be cut into plurality of small blocks according to the finished product battery size, after finishing, cutting stacks according to the circulation of the sequence of unit of anode pole piece 2, barrier film 4, cathode pole piece 3, barrier film 4 again, link to each other by lug (not drawing among the figure) again between the different electrode plates, thereby be prepared from, it makes structure as shown in Figure 1.
Usually all adopt the substrate of tinsel in the above-mentioned prior art as electrode plates, and apply thereon with a kind of positive pole or negative active core-shell material, for example, on Copper Foil, be coated with the negative active core-shell material that the mixed slurry of material with carbon element and necessary conductive agent and binding agent is made, be coated with LiCoO on the aluminium foil
2The positive electrode active materials that the conductive agent of material and necessity and the mixed slurry of binding agent are made, and can in same substrate, not apply different positive pole or negative active core-shell material.
In conjunction with Fig. 2, Fig. 3 and shown in Figure 4, this lithium ion battery cell provided by the invention exempts to cut stacked preparation method, and it comprises the steps:
1) with membrane for polymer as substrate 1, single face or two-sided positive electrode active materials and the negative active core-shell material of alternately being coated with in substrate 1, form anode pole piece zone and cathode pole piece zone respectively, and between adjacent anode pole piece zone and cathode pole piece zone, leave certain interval as diaphragm area; Concrete the part of beating right oblique line among the figure is the anode pole piece zone as Fig. 2, shown in Figure 3, and the part of beating left oblique line is the cathode pole piece zone, and the part of the ruling that knits a net is a diaphragm area;
2) directly with substrate 1 along separator bar between anode pole piece zone and the diaphragm area and the separator bar alternate folding between cathode pole piece zone and the diaphragm area, formation is the electric core that the unit stacks order with anode pole piece 2, barrier film 4, cathode pole piece 3, barrier film 4, specifically as shown in Figure 4.
Size needs according to the finished product lithium ion battery, the inventive method is in the process of actual fabrication electricity core, length L and width W to anode pole piece zone, diaphragm area and cathode pole piece zone all can be adjusted, be the width of substrate 1 as the length L in anode pole piece zone, diaphragm area and cathode pole piece zone among Fig. 2, Fig. 3 and the embodiment shown in Figure 4, and the width W in anode pole piece zone, diaphragm area and cathode pole piece zone is all identical.Finally equally place in the housing after electricity core preparation is finished and inject electrolyte and promptly make the finished product battery with routine techniques.
It is as follows to adopt said method to carry out the instantiation of actual battery production:
Example one: square 523450 type lithium ion batteries
In conjunction with Fig. 2, shown in Figure 3, when preparing electric core, set that each regional width W is 34 millimeters in the substrate, and each regional length be the width L of substrate is 50 millimeters.LiFePO is coated in the anode pole piece zone
4And the positive electrode active materials made of the mixed slurry of conductive agent and binding agent, the negative active core-shell material that the mixed slurry of material with carbon element and conductive agent and binding agent is made is coated in the cathode pole piece zone, and membrane for polymer is the PE barrier film.Directly get final product after coating is finished, at last electric core is placed in the housing injection electrolyte to make the finished product battery according to the rectangular cell electricity core that is folded into shown in Figure 4.
Example two: square 113925 type lithium ion batteries
In conjunction with Fig. 2, shown in Figure 3, when preparing electric core, set that each regional width W is 39 millimeters in the substrate, and each regional length be the width L of substrate is 25 millimeters.LiCoO is coated in the anode pole piece zone
2And the positive electrode active materials made of the mixed slurry of conductive agent and binding agent, the negative active core-shell material that the mixed slurry of silicon materials and conductive agent and binding agent is made is coated in the cathode pole piece zone, and membrane for polymer is the PP barrier film.Directly get final product after coating is finished, at last electric core is placed in the housing injection electrolyte to make the finished product battery according to the rectangular cell electricity core that is folded into shown in Figure 4.
Example three: square 632996 type lithium ion batteries
In conjunction with Fig. 2, shown in Figure 3, when preparing electric core, set that each regional width W is 29 millimeters in the substrate, and each regional length be the width L of substrate is 96 millimeters.The positive electrode active materials that the mixed slurry of spinel and necessary binding agent and conductive agent is made is coated in the anode pole piece zone, the negative active core-shell material that the mixed slurry of tin material and conductive agent and binding agent is made is coated in the cathode pole piece zone, and barrier film is a high strength modified PE barrier film.Directly get final product after coating is finished, at last electric core is placed in the housing injection electrolyte to make the finished product battery according to the rectangular cell electricity core that is folded into shown in Figure 4.Barrier film is colloidal state after injecting a spot of electrolyte.
Claims (4)
1. a lithium ion battery cell exempts to cut stacked preparation method, it is characterized in that comprising the steps:
1) with membrane for polymer as substrate (1), single face or two-sided positive electrode active materials and the negative active core-shell material of alternately being coated with in substrate (1), form anode pole piece zone and cathode pole piece zone respectively, and between adjacent anode pole piece zone and cathode pole piece zone, leave certain interval as diaphragm area;
2) directly with substrate (1) along separator bar between anode pole piece zone and the diaphragm area and the separator bar alternate folding between cathode pole piece zone and the diaphragm area, forming with anode pole piece (2), barrier film (4), cathode pole piece (3), barrier film (4) be that the unit stacks electric core in proper order.
2. lithium ion battery cell according to claim 1 exempts to cut stacked preparation method, it is characterized in that the length in described anode pole piece zone, diaphragm area and cathode pole piece zone is the width of substrate, and anode pole piece zone, diaphragm area are identical with the width in cathode pole piece zone.
3. lithium ion battery cell according to claim 1 exempts to cut stacked preparation method, it is characterized in that described membrane for polymer is PP barrier film or PE barrier film, or the PP of modification or PE barrier film.
4. lithium ion battery cell according to claim 1 exempts to cut stacked preparation method, it is characterized in that described positive electrode active materials positive electrode is LiFePO
4, LiCoO
2The perhaps mixed slurry of spinelle and conductive agent and binding agent, described negative material then are material with carbon element, silicon materials or tin material and the necessary conductive agent and the mixed slurry of binding agent.
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| CN2010102620744A CN101944639A (en) | 2010-08-25 | 2010-08-25 | Cutting-free laminated preparation method of lithium ion battery cell |
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| CN2010102620744A CN101944639A (en) | 2010-08-25 | 2010-08-25 | Cutting-free laminated preparation method of lithium ion battery cell |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420312A (en) * | 2011-11-04 | 2012-04-18 | 北京好风光储能技术有限公司 | High-voltage lithium ion battery, composite electrode couple and preparation methods of high-voltage lithium ion battery and composite electrode couple |
| CN103178226A (en) * | 2011-12-22 | 2013-06-26 | 北京好风光储能技术有限公司 | Membrane and preparation method and application thereof |
| CN103187591A (en) * | 2011-12-28 | 2013-07-03 | 清华大学 | Preparation method for lithium-ion battery |
| CN105932339A (en) * | 2016-06-13 | 2016-09-07 | 合肥国轩高科动力能源有限公司 | Rapid preparation method of winding type lithium ion laminated battery |
| US9466826B2 (en) | 2011-12-28 | 2016-10-11 | Tsinghua University | Method for making lithium ion battery electrode |
| US9537151B2 (en) | 2011-12-28 | 2017-01-03 | Tsinghua University | Lithium ion battery electrode |
| US9577265B2 (en) | 2011-12-28 | 2017-02-21 | Tsinghua University | Thin film lithium ion battery |
| US9774028B2 (en) | 2011-12-28 | 2017-09-26 | Tsinghua University | Method for making thin film lithium ion battery |
| CN109935915A (en) * | 2019-04-17 | 2019-06-25 | 深圳吉阳智能科技有限公司 | A kind of lamination type electric core formation system |
| CN110459813A (en) * | 2019-07-02 | 2019-11-15 | 萨姆蒂萨（天津）数据信息技术有限公司 | A kind of preparation method of lithium battery |
| CN111928805A (en) * | 2020-07-31 | 2020-11-13 | 中国科学院宁波材料技术与工程研究所 | Method for testing and analyzing expansion rate of silicon-based negative electrode material |
| CN113410524A (en) * | 2021-05-31 | 2021-09-17 | 惠州市恒泰科技股份有限公司 | Arc-shaped laminated lithium battery and laminating method thereof |
| CN113571762A (en) * | 2021-09-26 | 2021-10-29 | 东莞塔菲尔新能源科技有限公司 | Battery cell and manufacturing method thereof |
| CN114843576A (en) * | 2022-04-22 | 2022-08-02 | 上海兰钧新能源科技有限公司 | Battery core and battery |
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2010
- 2010-08-25 CN CN2010102620744A patent/CN101944639A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420312B (en) * | 2011-11-04 | 2014-07-02 | 北京好风光储能技术有限公司 | High-voltage lithium ion battery, composite electrode couple and preparation methods of high-voltage lithium ion battery and composite electrode couple |
| CN102420312A (en) * | 2011-11-04 | 2012-04-18 | 北京好风光储能技术有限公司 | High-voltage lithium ion battery, composite electrode couple and preparation methods of high-voltage lithium ion battery and composite electrode couple |
| CN103178226A (en) * | 2011-12-22 | 2013-06-26 | 北京好风光储能技术有限公司 | Membrane and preparation method and application thereof |
| US9577265B2 (en) | 2011-12-28 | 2017-02-21 | Tsinghua University | Thin film lithium ion battery |
| CN103187591B (en) * | 2011-12-28 | 2015-11-25 | 清华大学 | The preparation method of lithium ion battery |
| US9466826B2 (en) | 2011-12-28 | 2016-10-11 | Tsinghua University | Method for making lithium ion battery electrode |
| US9537151B2 (en) | 2011-12-28 | 2017-01-03 | Tsinghua University | Lithium ion battery electrode |
| CN103187591A (en) * | 2011-12-28 | 2013-07-03 | 清华大学 | Preparation method for lithium-ion battery |
| US9774028B2 (en) | 2011-12-28 | 2017-09-26 | Tsinghua University | Method for making thin film lithium ion battery |
| CN105932339A (en) * | 2016-06-13 | 2016-09-07 | 合肥国轩高科动力能源有限公司 | Rapid preparation method of winding type lithium ion laminated battery |
| CN109935915A (en) * | 2019-04-17 | 2019-06-25 | 深圳吉阳智能科技有限公司 | A kind of lamination type electric core formation system |
| CN109935915B (en) * | 2019-04-17 | 2024-02-27 | 深圳吉阳智能科技有限公司 | Lamination type battery cell forming system |
| CN110459813A (en) * | 2019-07-02 | 2019-11-15 | 萨姆蒂萨（天津）数据信息技术有限公司 | A kind of preparation method of lithium battery |
| CN111928805A (en) * | 2020-07-31 | 2020-11-13 | 中国科学院宁波材料技术与工程研究所 | Method for testing and analyzing expansion rate of silicon-based negative electrode material |
| CN113410524A (en) * | 2021-05-31 | 2021-09-17 | 惠州市恒泰科技股份有限公司 | Arc-shaped laminated lithium battery and laminating method thereof |
| CN113571762A (en) * | 2021-09-26 | 2021-10-29 | 东莞塔菲尔新能源科技有限公司 | Battery cell and manufacturing method thereof |
| CN114843576A (en) * | 2022-04-22 | 2022-08-02 | 上海兰钧新能源科技有限公司 | Battery core and battery |
| CN114843576B (en) * | 2022-04-22 | 2024-05-24 | 上海兰钧新能源科技有限公司 | Battery cell and battery |
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Application publication date: 20110112 |