CN107946654A - A kind of lithium ion battery and its laser manufacture method and laser cleaner - Google Patents
A kind of lithium ion battery and its laser manufacture method and laser cleaner Download PDFInfo
- Publication number
- CN107946654A CN107946654A CN201711143432.8A CN201711143432A CN107946654A CN 107946654 A CN107946654 A CN 107946654A CN 201711143432 A CN201711143432 A CN 201711143432A CN 107946654 A CN107946654 A CN 107946654A
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- Prior art keywords
- laser
- pole piece
- region
- lithium ion
- manufacture method
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 32
- 238000000576 coating method Methods 0.000 claims abstract description 32
- 229910052493 LiFePO4 Inorganic materials 0.000 claims abstract description 30
- 239000011888 foil Substances 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 238000002309 gasification Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 16
- 238000007493 shaping process Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 11
- 241000931526 Acer campestre Species 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 210000001367 artery Anatomy 0.000 claims 2
- 210000003462 vein Anatomy 0.000 claims 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000005955 Ferric phosphate Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229940032958 ferric phosphate Drugs 0.000 description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 2
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- ZSYNKHJUSDFTCQ-UHFFFAOYSA-N [Li].[Fe].P(O)(O)(O)=O Chemical compound [Li].[Fe].P(O)(O)(O)=O ZSYNKHJUSDFTCQ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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 present invention provides a kind of lithium ion battery and its laser manufacture method and laser cleaner, the present invention is capable of the coating of efficient, high-quality, environmentally friendly, stabilization removing battery pole piece surface specific location, the manufacturing process of lithium ion battery is simplified, improves manufacture efficiency.Laser manufacture method includes:The first battery pole piece with lug is made in cross cutting;The LiFePO4 coating of first thickness is made in foil substrate;Determine the region to be cleaned of the foil substrate, picosecond pulse laser is used to scan the LiFePO4 coating in the region to be cleaned in the form of linear light spot, so that the LiFePO4 coating expands gasification and departs from the foil substrate, the to-be-welded region departing from the LiFePO4 coating is formed;Pole piece is welded in the to-be-welded region, so as to form the second battery pole piece;Combination connects first battery pole piece and second battery pole piece, forms lithium ion battery.
Description
Technical field
The present invention relates to face coat cleaning technique field, more particularly to a kind of lithium ion battery and its laser manufacturer
Method and laser cleaner.
Background technology
Since 21 century, with economy continue to develop, the demand of new energy is increasingly increased, solar energy, wind energy, nuclear energy and
Chemical energy is the new energy form for substituting non-renewable energy resources, and lithium ion battery is as a kind of form in chemical energy source, tool
Have the advantages that small, light weight, discharge voltage are high, bigger than energy, although lithium ion battery technology also there are it is certain the defects of,
But the commercial applications in the field such as consumption electronic product and laptop are popularized further.In recent years, Asia large-scale production
The competition of lithium ion battery is growing day by day, and European Union, which also looks for another way, produces lithium ion battery of new generation, makes it have the property of higher
Valency is than, compatibility that is more environmentally friendly, significantly improving ecological environment.
The most common positive electrode of lithium ion battery has cobalt acid lithium (LiCoO2), LiMn2O4 (Li Mn2O4) LiFePO4
(LiFePO4) and trielement composite material (NCM or NCA).Wherein, cobalt acid lithium is most mature and stable and earliest commercialized material,
After cobalt acid lithium ion battery is proposed in the 1990s, this material is in electronic fields such as mobile phone, notebook, tablet computers
Very extensive application is obtained.The capacity of LiMn2O4 and ternary material is larger, but the high-temperature behavior of LiMn2O4 is poor, the circulation longevity
Order low, ternary material is restricted by cost, security and various factors.The security performance of LiFePO4 is very high, under its high temperature
Stability is relatively good, and cycle life is longer, becomes the common material of anode, and most potential positive electrode.
The annual compound growth rate for showing LiFePO4 market between 2016~the year two thousand twenty in recent a market survey report is 20.5%,
China is exactly the important pushing hands for promoting ferric phosphate lithium cell consumption to increase.
During lithium ion battery is made, the structure with lug is made by directly cross cutting in small part battery pole piece,
And in addition most battery pole piece needs the soldering polar ear in foil substrate, then need to dispose battery pole piece before welding
On coating, it is exposed foil substrate.
The content of the invention
The invention aims to provide a kind of lithium ion battery and its laser manufacture method and laser cleaner, this hair
The bright coating for removing battery pole piece surface specific location that can be efficient, high-quality, environmentally friendly, stable, simplifies manufacturing process, improves
The manufacture efficiency of lithium ion battery.
To achieve these goals, the present invention provides a kind of laser manufacture method of lithium ion battery, including:
The first battery pole piece with lug is made in cross cutting;
The LiFePO4 coating of first thickness is made in foil substrate, the first thickness is 70-90 μm;
Determine the region to be cleaned of the foil substrate, use picosecond pulse laser scanned in the form of linear light spot described in treat
The LiFePO4 coating of cleaning area so that the LiFePO4 coating expands gasification and departs from the aluminium foil base
Body, forms the to-be-welded region departing from the LiFePO4 coating;The vibration mirror scanning speed of the picosecond pulse laser is
1000~3000mm/s, laser pulse frequency are 600~800kHz;
Pole piece is welded in the to-be-welded region, so as to form the second battery pole piece;
Combination connects first battery pole piece and second battery pole piece, forms lithium ion battery.
Preferably, it is described to use picosecond pulse laser to scan institute in the form of linear light spot in above-mentioned laser manufacture method
The step of LiFePO4 coating for stating region to be cleaned, specifically includes:
Open laser, output point hot spot;
By described spot shaping it is the linear light spot by spot shaping device;
Formula irradiation is scanned to the region to be cleaned by the linear light spot.
Preferably, in above-mentioned laser manufacture method, the maximum power for the picosecond pulse laser that the laser is sent is
20W, optical maser wavelength are 1000~1100nm, and laser pulse width is 120~150ps.
Preferably, in above-mentioned laser manufacture method, the optical maser wavelength is 1060nm, and the laser pulse width is
150ps。
Preferably, in above-mentioned laser manufacture method, the first thickness is 80 μm.
Preferably, in above-mentioned laser manufacture method, further include:Collected by dust exhaust apparatus, filter expanded gasification simultaneously
Depart from the dirt of the foil substrate.
Present invention also offers a kind of lithium ion battery manufactured according to above-mentioned laser manufacture method, including:
The first battery pole piece of lug is carried made of cross cutting;
Second battery pole piece, including:Foil substrate;The LiFePO4 coating of first thickness, is arranged on the foil substrate
On;The welding region obtained by LiFePO4 coating described in laser cleaning, in the foil substrate;Pole piece, is welded on
The welding region.
Present invention also offers a kind of laser cleaner for above-mentioned lithium ion battery, including:
Laser, output point hot spot;
Spot shaping device, inputs described hot spot, output line hot spot;
Laser head, is directed at the welding region of the lithium ion battery.
Preferably, in above-mentioned laser cleaner, the maximum power for the picosecond pulse laser that the laser is sent is
20W, optical maser wavelength are 1000~1100nm, and laser pulse width is 120~150ps.
Preferably, in above-mentioned laser cleaner, further include:Dust exhaust apparatus.
The embodiment of the present invention has following technique effect:
1) in the embodiment of the present invention, to use picosecond pulse laser to be scanned in the form of linear light spot so that the ferric phosphate
Lithium coating expands gasification and departs from the foil substrate, thus it is accurate it is clean and tidy obtain welding region, without useization
Cleaning material is learned, processing and manufacturing environment is improved, simplifies manufacturing process, improve the manufacture efficiency of lithium ion battery.
Recycling filtering is carried out by dust exhaust apparatus, surrounding environment will not be polluted.
3) laser cleaning scope is wide.Laser can remove different types of battery pole piece face coat, and cleaning area
It is exactly accurate.
4) laser cleaning is easy to automate.Optical fiber can be passed through using the cleaning device laser of battery pole piece face coat
It is transmitted, and laser cleaning is contactless cleaning, has very high adaptability, is greatly improved with reference to mechanical driving device
Cleaning efficiency.
5) laser action area size is adjustable, and cleaning area is easily controllable, can remove designated position on battery pole piece
Coating, and do not remained on the aluminium foil of battery pole piece after cleaning, while ensure that matrix aluminium foil is injury-free and do not produce change
Shape.
According to the accompanying drawings will be brighter to the detailed description of the specific embodiment of the invention, those skilled in the art
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of detailed description of the present invention by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference numeral denotes same or similar component or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the step flow chart of the method for the present invention embodiment;
Fig. 2 is the structure diagram of lithium ion battery of the present invention;
Fig. 3 is the structure diagram of laser cleaner of the present invention.
Embodiment
Fig. 1 is the step flow chart of the method for the present invention embodiment, as shown in Figure 1, the present invention provides a kind of lithium ion battery
Laser manufacture method, including:
Step 101, the first battery pole piece with lug is made in cross cutting;
Step 102, the LiFePO4 coating of first thickness is made in foil substrate, the first thickness is 70-90 μm;
Step 103, determine the region to be cleaned of the foil substrate, use picosecond pulse laser to be swept in the form of linear light spot
Retouch the LiFePO4 coating in the region to be cleaned so that the LiFePO4 coating is expanded described in gasification and disengaging
Foil substrate, forms the to-be-welded region departing from the LiFePO4 coating;The vibration mirror scanning speed of the picosecond pulse laser
Rate is 1000~3000mm/s, and laser pulse frequency is 600~800kHz;
Step 104, pole piece is welded in the to-be-welded region, so as to form the second battery pole piece;
Step 105, combination connects first battery pole piece and second battery pole piece, forms lithium ion battery.
As it can be seen that in the embodiment of the present invention, to use picosecond pulse laser to be scanned in the form of linear light spot so that the phosphoric acid
Iron lithium coating expands gasification and departs from the foil substrate, thus it is accurate it is clean and tidy obtain welding region, without using
Chemical scrub, improves processing and manufacturing environment, simplifies manufacturing process, improves the manufacture efficiency of lithium ion battery.
In one embodiment of the invention, it is described use picosecond pulse laser scanned in the form of linear light spot described in treat it is clear
The step of LiFePO4 coating for washing region, specifically includes:
Open laser, output point hot spot;
By described spot shaping it is the linear light spot by spot shaping device;
Formula irradiation is scanned to the region to be cleaned by the linear light spot.
Wherein, the maximum power for the picosecond pulse laser that the laser is sent is 20W, optical maser wavelength for 1000~
1100nm, laser pulse width are 120~150ps.Specifically, the optical maser wavelength is 1060nm, the laser pulse width
For 150ps.
In one embodiment of the invention, the first thickness is 80 μm.
In one embodiment of the invention, further include:Collected by dust exhaust apparatus, filter expanded gasification and depart from institute
State the dirt of foil substrate.
Fig. 2 is the structure diagram of lithium ion battery of the present invention;As shown in Fig. 2, the embodiment of the present invention provides a kind of basis
The lithium ion battery of above-mentioned laser manufacture method manufacture, including:
The first battery pole piece 210 with lug is made in cross cutting;
Second battery pole piece 220, including:Foil substrate 221;The LiFePO4 coating 222 of first thickness, is arranged on described
In foil substrate;The welding region obtained by LiFePO4 coating described in laser cleaning, in the foil substrate;Pole piece
223, it is welded on the welding region.
Fig. 3 is the structure diagram of laser cleaner of the present invention.As shown in figure 3, the embodiment of the present invention provides a kind of use
In the laser cleaner of above-mentioned lithium ion battery, including:
Laser 301, output point hot spot;
Spot shaping device 302, inputs described hot spot, output line hot spot;
Laser head 303, is directed at the welding region of the lithium ion battery.
In one embodiment of the invention, the maximum power for the picosecond pulse laser that the laser is sent is 20W, is swashed
A length of 1000~the 1100nm of light wave, laser pulse width are 120~150ps.
In one embodiment of the invention, further include:Dust exhaust apparatus.
In some illustrative embodiments, cleaning device, further includes:Carry mechanical arm, the carrying battery pole of laser head
The workbench of piece, the laser are fixedly connected with described mechanical arm one end, the mechanical arm other end and the carrying
The workbench of battery pole piece is fixedly connected;Laser, optical fiber, spot shaping device, condenser lens and protection eyeglass are sequentially connected with.
Wherein, the cleaning device of battery pole piece face coat is mutual by the workbench of mechanical arm, carrying battery pole piece
Coordinate, control hot spot is moved in the surface of position for needing to clean, and makes the focus of hot spot all the time on its surface is treated, and clean and specify
The LiFePO4 coating of position.
In some illustrative embodiments, the spot shaping device uses scanning galvanometer or polygon scanning mirrors.
There is the transport mechanism for being used for transmitting battery pole piece in some illustrative embodiments, on the workbench, with institute
State mechanical arm and be engaged transmission.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, without departing from the spirit and scope of the present invention, still can according to the present invention disclosure it is direct
Determine or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers other all these variations or modifications.
Claims (10)
- A kind of 1. laser manufacture method of lithium ion battery, it is characterised in that including:The first battery pole piece with lug is made in cross cutting;The LiFePO4 coating of first thickness is made in foil substrate, the first thickness is 70-90 μm;Determine the region to be cleaned of the foil substrate, use picosecond pulse laser to be scanned in the form of linear light spot described to be cleaned The LiFePO4 coating in region so that the LiFePO4 coating expands gasification and departs from the foil substrate, shape Into the to-be-welded region departing from the LiFePO4 coating;The vibration mirror scanning speed of the picosecond pulse laser for 1000~ 3000mm/s, laser pulse frequency are 600~800kHz;Pole piece is welded in the to-be-welded region, so as to form the second battery pole piece;Combination connects first battery pole piece and second battery pole piece, forms lithium ion battery.
- 2. laser manufacture method according to claim 1, it is characterised in that described to use picosecond pulse laser with linear light spot Form the step of scanning the LiFePO4 coating in the region to be cleaned specifically include:Open laser, output point hot spot;By described spot shaping it is the linear light spot by spot shaping device;Formula irradiation is scanned to the region to be cleaned by the linear light spot.
- 3. laser manufacture method according to claim 2, it is characterised in thatThe maximum power for the picosecond pulse laser that the laser is sent is 20W, and optical maser wavelength is 1000~1100nm, laser arteries and veins It is 120~150ps to rush width.
- 4. laser manufacture method according to claim 3, it is characterised in that the optical maser wavelength is 1060nm, described to swash Light impulse length is 150ps.
- 5. laser manufacture method according to claim 1, it is characterised in that the first thickness is 80 μm.
- 6. laser manufacture method according to claim 2, it is characterised in that further include:Collected, filtered by dust exhaust apparatus Expanded gasification simultaneously departs from the dirt of the foil substrate.
- A kind of 7. lithium ion battery of laser manufacture method manufacture according to claim 1-6, it is characterised in that including:The first battery pole piece of lug is carried made of cross cutting;Second battery pole piece, including:Foil substrate;The LiFePO4 coating of first thickness, is arranged in the foil substrate;It is logical The welding region that LiFePO4 coating described in laser cleaning obtains is crossed, in the foil substrate;Pole piece, is welded on the weldering Connect region.
- A kind of 8. laser cleaner of lithium ion battery for described in claim 7, it is characterised in that including:Laser, output point hot spot;Spot shaping device, inputs described hot spot, output line hot spot;Laser head, is directed at the welding region of the lithium ion battery.
- 9. laser cleaner according to claim 8, it is characterised in thatThe maximum power for the picosecond pulse laser that the laser is sent is 20W, and optical maser wavelength is 1000~1100nm, laser arteries and veins It is 120~150ps to rush width.
- 10. laser cleaner according to claim 8, it is characterised in that further include:Dust exhaust apparatus.
Priority Applications (1)
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CN201711143432.8A CN107946654A (en) | 2017-11-17 | 2017-11-17 | A kind of lithium ion battery and its laser manufacture method and laser cleaner |
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CN201711143432.8A CN107946654A (en) | 2017-11-17 | 2017-11-17 | A kind of lithium ion battery and its laser manufacture method and laser cleaner |
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Family
ID=61931679
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111151515A (en) * | 2020-01-10 | 2020-05-15 | 广东利元亨智能装备股份有限公司 | Laser cleaning method and device |
CN112658489A (en) * | 2020-12-29 | 2021-04-16 | 比亚迪股份有限公司 | Method for removing active substances of pole piece |
CN114273341A (en) * | 2021-12-13 | 2022-04-05 | 深圳市凌云视迅科技有限责任公司 | Pole piece double-face cleaning and positioning method and device |
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 |
CN115036446A (en) * | 2022-06-23 | 2022-09-09 | 天津力神电池股份有限公司 | Manufacturing method of pole piece of lithium ion battery with embedded pole lug structure |
CN115319292A (en) * | 2022-10-14 | 2022-11-11 | 苏州智慧谷激光智能装备有限公司 | Laser welding method for junction box |
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