CN103094521A - Positive plate of lithium ion power battery as well as manufacturing method and laser etching device of positive plate - Google Patents
Positive plate of lithium ion power battery as well as manufacturing method and laser etching device of positive plate Download PDFInfo
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- CN103094521A CN103094521A CN2013100231567A CN201310023156A CN103094521A CN 103094521 A CN103094521 A CN 103094521A CN 2013100231567 A CN2013100231567 A CN 2013100231567A CN 201310023156 A CN201310023156 A CN 201310023156A CN 103094521 A CN103094521 A CN 103094521A
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- lithium ion
- power battery
- positive plate
- ion power
- microflute
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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
Abstract
The invention discloses a positive plate of a lithium ion power battery as well as a manufacturing method and a laser etching device of the positive plate. The positive plate comprises a positive current collection body and a positive membrane applied onto the positive current collection body, wherein a micro groove is etched on the positive membrane; and the depth of the micro groove is smaller than the thickness of a one-layer electrode membrane. The micro groove is etched on the positive membrane after the cold-pressing operation, so that the wetting performance of the surface of the lithium iron phosphate positive plate to an electrolyte solution is improved to a great extent, the permeation efficiency of the electrolyte solution of the high-capacity lithium ion power battery is improved, the distribution uniformity of the electrolyte solution in the positive plate is improved, the capacity of the lithium ion power battery is increased, the cycle life of the lithium ion power battery is prolonged, and the production efficiency of the lithium ion power battery is improved at the same time.
Description
Technical field
The present invention relates to a kind of lithium-ion-power cell, more particularly, the present invention relates to a kind of lithium ion power battery cathode sheet and manufacture method thereof.
Background technology
The liquid injection process original adoption of lithium ion battery carries out manual fluid injection in glove box or drying box, this kind fluid injection efficient and absorption efficiency are extremely slow.Along with the development of technology, lithium ion battery vacuum liquid injecting machine and vacuum and malleation circulation filling machine had appearred afterwards, and above-mentioned fluid injection mode can promote battery of mobile phone, fluid injection efficient and the production capacity of the small-capacity cells such as Notebook Battery greatly.
But along with energy crisis and the environmental protection problem that development and the mankind of modern society face, people begin lithium ion battery applications to provide actuating force with lithium-ion-power cell for automobile in automobile industry, accomplish zero discharge, and zero pollutes.lithium-ion-power cell makes people to battery capacity and Capacity uniformity thereof, higher requirement arranged in the application of automobile industry, therefore fluid injection efficient and infiltration rate lowly becomes the large production bottleneck of lithium-ion-power cell manufacturing again, especially the lithium-ion-power cell take nano-lithium iron phosphate as anodal system, smooth due to its positive plate surface compact, infiltration and absorption to electrolyte are all very slow, production efficiency and electrolyte have greatly been affected in the distribution of inside battery, and electrolyte is at the inner skewness of battery pole piece, the performance of battery capacity and the consistency of capacity thereof there is considerable influence.
In view of this, necessary a kind of electrolyte wetting property lithium ion power battery cathode sheet and the manufacture method thereof preferably of providing.
Summary of the invention
The object of the invention is to: a kind of electrolyte wetting property lithium ion power battery cathode sheet and manufacture method thereof preferably are provided, with raising battery production efficient, and improve the uniformity that electrolyte distributes at inside battery, guarantee the consistency of battery capacity.
In order to realize the foregoing invention purpose, the invention provides a kind of lithium ion power battery cathode sheet, it comprises plus plate current-collecting body and the anodal diaphragm that is coated on plus plate current-collecting body, and on anodal diaphragm, etching has microflute, and the degree of depth of microflute is less than the thickness of the anodal diaphragm of individual layer.
As a kind of improvement of lithium ion power battery cathode sheet of the present invention, the width of described microflute is 5 ~ 20 microns, and the degree of depth is 1 ~ 5 micron.
As a kind of improvement of lithium ion power battery cathode sheet of the present invention, the distribution of described microflute on anodal diaphragm is cross direction profiles, vertically distribution or right-angled intersection distribution.
As a kind of improvement of lithium ion power battery cathode sheet of the present invention, described microflute is spaced set.
As a kind of improvement of lithium ion power battery cathode sheet of the present invention, the active material in described anodal diaphragm is mainly nano level LiFePO 4 particle.
In order to realize the foregoing invention purpose, the present invention also provides a kind of manufacture method for the production of the described positive plate of above-mentioned arbitrary paragraph, it comprises the following steps: active material and binding agent are mixed into slurry, then the slurry that mixes is coated in the anode collection surface and forms anodal diaphragm, high-temperature baking is removed the solvent composition in slurry, obtains having the positive plate of certain compacted density through colding pressing; Laser-induced thermal etching is carried out on positive plate surface after colding pressing processed, etch microflute on anodal diaphragm.
To achieve these goals, the present invention also provides a kind of laser etching device for the production of the described positive plate of above-mentioned arbitrary paragraph, and it comprises pole piece let off roll, pole piece wind-up roll, generating laser bracing frame and a plurality of pulse laser reflector that is fixed on the generating laser bracing frame.
As a kind of improvement of laser etching device of the present invention, described pole piece let off roll or pole piece wind-up roll are fixed in the bottom of generating laser bracing frame, and the pulse laser reflector is fixed on the top of generating laser bracing frame.
As a kind of improvement of laser etching device of the present invention, be equidistant arranging between described different pulse laser reflectors.
Compared with prior art, lithium ion power battery cathode sheet of the present invention is by etching microflute on the anodal diaphragm after colding pressing, improved to a great extent ferrous lithium phosphate cathode sheet surface to the wetting property of electrolyte, improved the electrolyte permeability efficient of high-capacity lithium-ion power battery, improved the consistency that electrolyte distributes in positive plate, be conducive to the performance of lithium-ion-power cell capacity and the lifting of cycle life, also improved the production efficiency of lithium-ion-power cell simultaneously.
Description of drawings
Below in conjunction with the drawings and specific embodiments, lithium ion power battery cathode sheet of the present invention and manufacture method thereof and useful technique effect are elaborated.
Fig. 1 is the laser-induced thermal etching schematic diagram of lithium ion power battery cathode sheet of the present invention.
Embodiment
Lithium ion power battery cathode sheet of the present invention comprises plus plate current-collecting body and the anodal diaphragm that is coated on plus plate current-collecting body, and wherein, plus plate current-collecting body is aluminium foil, and the active material in anodal diaphragm is mainly nano level LiFePO 4 particle.The manufacturing process of above-mentioned positive plate is for first being mixed into slurry with active material and binding agent, then the slurry that mixes is coated in aluminium foil surface, the process high-temperature baking is removed the solvent composition in slurry again, obtains having the positive plate of certain compacted density finally by crossing to cold pressing.
Because above-mentioned positive plate is product after colding pressing, surface compact and smooth, its wetting property extreme difference to electrolyte, therefore reel or the lamination assembling before to carrying out the laser-induced thermal etching processing in its surface, to improve its electrolyte wetting property.
See also Fig. 1, the device that is used for positive plate 20 is carried out laser-induced thermal etching comprises pole piece let off roll 40, pole piece wind-up roll 42, generating laser bracing frame 44 and a plurality of pulse laser reflector 46.Wherein, pole piece let off roll 40 or pole piece wind-up roll 42 are fixed in the bottom of generating laser bracing frame 44, and pulse laser reflector 46 is fixed on the top of generating laser bracing frame 44, are equidistant arranging between different pulse laser reflectors 46.
During use, positive plate 20 along continuous straight runs (in Fig. 1 A to) under the effect of pole piece let off roll 40 and pole piece wind-up roll 42 is mobile, the anodal diaphragm that 46 of pulse laser reflectors send 48 pairs of positive plates 20 of pulse laser carries out etching, thereby etches equally spaced microflute 22 on anodal diaphragm.The degree of depth of microflute 22 must less than the thickness of anodal diaphragm, that is to say and cathode film sheet eating thrown can not be exposed plus plate current-collecting body.The preferred depths of microflute 22 is 1 ~ 5 micron, and better width is 5 ~ 20 microns.
In different execution modes, the distribution of institute's etching microflute 22 can be cross direction profiles, vertically distribution or right-angled intersection distribution, its hierarchy structure can be regulated by power and the defocusing amount of pulse laser reflector 46 as required, and the spacing of microflute 22 can be regulated by the spacing of adjusting between pulse laser reflector 46 as required.
After tested, compare with the battery core of the not positive plate preparation of etching microflute, the battery core fluid injection time of using the present invention to etch the positive plate preparation of microflute foreshortens to 10-22min by 30min, and the fluid injection time shortens with the increase of etching microflute density.
Lithium ion power battery cathode sheet of the present invention is by etching microflute 22 on the anodal diaphragm after colding pressing, improved to a great extent ferrous lithium phosphate cathode sheet surface to the wetting property of electrolyte, improved the electrolyte permeability efficient of high-capacity lithium-ion power battery, improved the consistency that electrolyte distributes in positive plate, be conducive to the performance of lithium-ion-power cell capacity and the lifting of cycle life, also improved simultaneously the production efficiency of lithium-ion-power cell, therefore be highly suitable in the high-capacity lithium-ion power batteries such as electric bicycle, electric automobile.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although used some specific terms in this specification, these terms do not consist of any restriction to the present invention just for convenience of description.
Claims (9)
1. a lithium ion power battery cathode sheet, comprise plus plate current-collecting body and the anodal diaphragm that is coated on plus plate current-collecting body, and it is characterized in that: on described anodal diaphragm, etching has microflute, and the degree of depth of microflute is less than the thickness of the anodal diaphragm of individual layer.
2. lithium ion power battery cathode sheet according to claim 1, it is characterized in that: the width of described microflute is 5 ~ 20 microns, the degree of depth is 1 ~ 5 micron.
3. lithium ion power battery cathode sheet according to claim 1 is characterized in that: the distribution of described microflute on anodal diaphragm be cross direction profiles, vertically distribute or right-angled intersection distributes.
4. lithium ion power battery cathode sheet according to claim 1, it is characterized in that: described microflute is spaced set.
5. lithium ion power battery cathode sheet according to claim 1, it is characterized in that: the active material in described anodal diaphragm is mainly nano level LiFePO 4 particle.
6. the manufacture method of the described positive plate of any one in a claim 1 to 5 is characterized in that comprising the following steps:
Active material and binding agent are mixed into slurry, then the slurry that mixes are coated in the anode collection surface and form anodal diaphragm, high-temperature baking is removed the solvent composition in slurry, obtains having the positive plate of certain compacted density through colding pressing;
Laser-induced thermal etching is carried out on positive plate surface after colding pressing processed, etch microflute on anodal diaphragm.
7. the laser etching device for the production of the described positive plate of any one in claim 1 to 5, is characterized in that: comprise pole piece let off roll, pole piece wind-up roll, generating laser bracing frame and a plurality of pulse laser reflector that is fixed on the generating laser bracing frame.
8. laser etching device according to claim 1, it is characterized in that: described pole piece let off roll or pole piece wind-up roll are fixed in the bottom of generating laser bracing frame, and the pulse laser reflector is fixed on the top of generating laser bracing frame.
9. laser etching device according to claim 1, is characterized in that: be equidistant arranging between described different pulse laser reflectors.
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| CN2013100231567A CN103094521A (en) | 2013-01-22 | 2013-01-22 | Positive plate of lithium ion power battery as well as manufacturing method and laser etching device of positive plate |
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| CN2013100231567A CN103094521A (en) | 2013-01-22 | 2013-01-22 | Positive plate of lithium ion power battery as well as manufacturing method and laser etching device of positive plate |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752773A (en) * | 2015-04-01 | 2015-07-01 | 广东烛光新能源科技有限公司 | Preparation method of lithium ion battery |
| CN107378262A (en) * | 2017-07-20 | 2017-11-24 | 深圳鸿元智能科技有限公司 | Lithium battery collector drilling method and laser drilling device |
| CN107403952A (en) * | 2017-07-26 | 2017-11-28 | 成都特隆美储能技术有限公司 | Fast fluid injection is high to infiltrate long-life lithium battery and manufacture method and mould |
| CN107591569A (en) * | 2017-10-10 | 2018-01-16 | 合肥国轩高科动力能源有限公司 | A kind of method for improving cylinder lithium titanate battery wetting property |
| CN107706006A (en) * | 2017-10-13 | 2018-02-16 | 浙江萨科能源科技有限公司 | A kind of preparation method for improving capacity of super capacitor |
| CN111060033A (en) * | 2019-12-27 | 2020-04-24 | 中航复合材料有限责任公司 | Fabric prepreg bow and weft variation detection device and detection method |
| CN112467073A (en) * | 2020-12-21 | 2021-03-09 | 江苏双登富朗特新能源有限公司 | Lithium ion battery pole piece and preparation method thereof |
| CN113224260A (en) * | 2021-03-23 | 2021-08-06 | 广州中国科学院工业技术研究院 | High-rate lithium battery structure and implementation method |
| CN114203968A (en) * | 2021-11-10 | 2022-03-18 | 华中科技大学 | Positive pole piece structure for promoting electrolyte infiltration and preparation method and application thereof |
| CN114203970A (en) * | 2021-11-30 | 2022-03-18 | 华中科技大学 | Electrode piece for improving wettability of lithium battery electrolyte and preparation method thereof |
| CN114365306A (en) * | 2019-12-23 | 2022-04-15 | 株式会社Lg新能源 | Apparatus and method for manufacturing electrode of secondary battery using laser and electrode of secondary battery manufactured thereby |
| CN114497445A (en) * | 2022-02-24 | 2022-05-13 | 东莞新能安科技有限公司 | Pole piece, electrochemical device and electric equipment |
| CN114597328A (en) * | 2022-03-22 | 2022-06-07 | 苏州天弘激光股份有限公司 | Method and device for manufacturing surface microstructure of high-rate battery pole piece |
| CN114365306B (en) * | 2019-12-23 | 2024-04-16 | 株式会社Lg新能源 | Apparatus and method for manufacturing electrode of secondary battery using laser and electrode of secondary battery manufactured by the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104752773B (en) * | 2015-04-01 | 2017-02-01 | 广东烛光新能源科技有限公司 | Preparation method of lithium ion battery |
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| CN107378262A (en) * | 2017-07-20 | 2017-11-24 | 深圳鸿元智能科技有限公司 | Lithium battery collector drilling method and laser drilling device |
| CN107403952A (en) * | 2017-07-26 | 2017-11-28 | 成都特隆美储能技术有限公司 | Fast fluid injection is high to infiltrate long-life lithium battery and manufacture method and mould |
| CN107591569A (en) * | 2017-10-10 | 2018-01-16 | 合肥国轩高科动力能源有限公司 | A kind of method for improving cylinder lithium titanate battery wetting property |
| CN107706006A (en) * | 2017-10-13 | 2018-02-16 | 浙江萨科能源科技有限公司 | A kind of preparation method for improving capacity of super capacitor |
| CN114365306A (en) * | 2019-12-23 | 2022-04-15 | 株式会社Lg新能源 | Apparatus and method for manufacturing electrode of secondary battery using laser and electrode of secondary battery manufactured thereby |
| CN114365306B (en) * | 2019-12-23 | 2024-04-16 | 株式会社Lg新能源 | Apparatus and method for manufacturing electrode of secondary battery using laser and electrode of secondary battery manufactured by the same |
| CN111060033A (en) * | 2019-12-27 | 2020-04-24 | 中航复合材料有限责任公司 | Fabric prepreg bow and weft variation detection device and detection method |
| CN112467073A (en) * | 2020-12-21 | 2021-03-09 | 江苏双登富朗特新能源有限公司 | Lithium ion battery pole piece and preparation method thereof |
| CN113224260A (en) * | 2021-03-23 | 2021-08-06 | 广州中国科学院工业技术研究院 | High-rate lithium battery structure and implementation method |
| CN114203968A (en) * | 2021-11-10 | 2022-03-18 | 华中科技大学 | Positive pole piece structure for promoting electrolyte infiltration and preparation method and application thereof |
| CN114203970A (en) * | 2021-11-30 | 2022-03-18 | 华中科技大学 | Electrode piece for improving wettability of lithium battery electrolyte and preparation method thereof |
| CN114203970B (en) * | 2021-11-30 | 2024-04-19 | 华中科技大学 | Electrode plate for improving wettability of lithium battery electrolyte and preparation method thereof |
| CN114497445A (en) * | 2022-02-24 | 2022-05-13 | 东莞新能安科技有限公司 | Pole piece, electrochemical device and electric equipment |
| CN114497445B (en) * | 2022-02-24 | 2024-03-12 | 东莞新能安科技有限公司 | Pole piece, electrochemical device and electric equipment |
| CN114597328A (en) * | 2022-03-22 | 2022-06-07 | 苏州天弘激光股份有限公司 | Method and device for manufacturing surface microstructure of high-rate battery pole piece |
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Application publication date: 20130508 |