CN114833142B - Pole piece laser cleaning power adjusting method - Google Patents
Pole piece laser cleaning power adjusting method Download PDFInfo
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- CN114833142B CN114833142B CN202210422497.0A CN202210422497A CN114833142B CN 114833142 B CN114833142 B CN 114833142B CN 202210422497 A CN202210422497 A CN 202210422497A CN 114833142 B CN114833142 B CN 114833142B
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- pole piece
- laser cleaning
- area
- laser
- sheet
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- 238000004140 cleaning Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000011888 foil Substances 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 238000005303 weighing Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000002950 deficient Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 7
- 239000011149 active material Substances 0.000 description 6
- 239000013543 active substance Substances 0.000 description 5
- 238000004080 punching Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The application belongs to the technical field of pole piece production, and particularly relates to a pole piece laser cleaning power adjusting method, which comprises the following steps: step S1, a pole piece comprises a slot area and an empty foil area; s2, carrying out laser cleaning on the surface of the groove area of the pole piece, which is provided with the coating, wherein the laser cleaning power is W1; s3, cutting a cleaning sheet with a preset unit area in a groove area of the pole piece, and weighing to obtain G1; s4, cutting empty sheets with the same area in the empty foil area of the pole piece, and weighing to obtain G2; and S5, calculating the residual coating weight G3 of the groove after laser cleaning according to the G1 and the G2, and adjusting the laser power according to the G3. The method for adjusting the laser cleaning power of the pole piece can adjust the laser cleaning power, so that the laser cleaning is more accurate, the current collector is not damaged or the cleaning is not clean, the cleaning quality is good, defective products after the laser cleaning are prevented from flowing into subsequent processes, and the product quality is improved.
Description
Technical Field
The application belongs to the technical field of pole piece production, and particularly relates to a pole piece laser cleaning power adjusting method.
Background
The lithium ion battery is widely applied to the fields of energy storage, 3C, new energy vehicles and the like due to the advantages of high energy density, long cycle life, high platform voltage, good safety performance and the like.
At present, the laser cleaning process is mainly applied to cleaning coated cathode and anode pole pieces in the manufacturing process of the lithium ion battery, so that small slots for welding the pole lugs are manufactured, as the thickness of a current collector bearing slurry is thinner and thinner, if the power during laser cleaning is not controlled, damage, penetration or uncleanness of cleaning caused by too large laser power of the current collector is easy to occur, the welding process of the following pole lugs can be influenced by too large or too small laser power during cleaning, however, the laser cleaning precision is higher, whether laser cleaning laser is suitable or not is difficult to find in the cleaning process, and therefore, the laser power is difficult to adjust, bad points are not found until the current collector is subjected to a subsequent welding process after cleaning, even bad points are not found until a finished product is obtained, and the production quality and the cost are seriously influenced.
Disclosure of Invention
One of the objects of the present application is: aiming at the defects of the prior art, the method for adjusting the laser cleaning power of the pole piece can adjust the laser cleaning power, so that the laser cleaning quality is good, defective products after laser cleaning are prevented from flowing into subsequent processes, and the product quality is improved.
In order to achieve the above purpose, the present application adopts the following technical scheme:
a pole piece laser cleaning power adjusting method comprises the following steps:
step S1, carrying out laser cleaning on one surface of a groove area of a pole piece, which is provided with a coating, wherein the initial value of laser cleaning power is W1;
s2, cutting a cleaning sheet with a preset unit area in a groove area of the pole piece, and weighing to obtain G1;
s3, cutting empty sheets with the same area in the empty foil area of the pole piece, and weighing to obtain G2;
step S4, calculating the residual coating weight G3 of the groove after laser cleaning according to the G1 and the G2, judging whether the G3 is in a preset safety weight range, adjusting the laser cleaning power according to whether the G3 is in the preset safety weight range to obtain a final value W0, and if the G3 is larger than the maximum value of the preset safety weight range, increasing the laser power; if G3 is smaller than the minimum value of the preset safe weight range, reducing the laser power;
the pole piece comprises a slot position area and an empty foil area, wherein one surface of the slot position area is coated with a coating, the other surface of the slot position area is an empty foil, and both side surfaces of the empty foil area are both empty foils.
Preferably, the preset safe weight range in step S4 is 0.1-1 mg.
Preferably, the laser power is reduced in the step S4 in a range of 1 to 3W.
Preferably, the range of increasing the laser power in the step S4 is 1 to 5W.
Preferably, the cleaning sheet in step S2 includes a first sheet, a second sheet and a third sheet, where the weight of the first sheet is G01, the weight of the second sheet is G02, and the weight of the third sheet is G03, and the average value of G01, G02 and G03 is calculated to be G1.
Preferably, the hollow sheets in step S3 include a first hollow sheet, a second hollow sheet and a third hollow sheet, the weight of the first hollow sheet is G04, the weight of the second hollow sheet is G05, the weight of the third hollow sheet is G06, and the average value of G04, G05 and G06 is calculated to be G2.
Preferably, before the laser cleaning in step S1, the method further includes previewing the slot area of the pole piece to determine the position of the slot area.
Preferably, the length of the groove position area is 20-30 mm, and the width is 10-25 mm.
Preferably, the preset unit area in the step S2 is 120-160 mm 2 。
Preferably, the laser cleaning power in the step S1 is initially 58-65W.
Compared with the prior art, the application has the beneficial effects that: the method for adjusting the laser cleaning power of the pole piece can judge according to the residual weight of the slot after laser cleaning, so that the laser cleaning is more accurate, the current collector is not damaged and is not cleaned cleanly during laser cleaning, the cleaning quality is good, defective products after laser cleaning are prevented from flowing into subsequent processes, and the product quality is improved.
Drawings
FIG. 1 is a flow chart of the steps of the pole piece laser cleaning power adjustment method of the present application.
Fig. 2 is a schematic illustration of a pole piece of the present application.
Fig. 3 is a schematic diagram of laser cleaning power adjustment of the pole piece of the present application.
Fig. 4 is a schematic view of a punched out purge sheet of the present application.
Detailed Description
1. A pole piece laser cleaning power adjusting method comprises the following steps:
step S1, carrying out laser cleaning on one surface of a groove area of a pole piece, which is provided with a coating, wherein the initial value of laser cleaning power is W1;
s2, cutting a cleaning sheet with a preset unit area in a groove area of the pole piece, and weighing to obtain G1;
s3, cutting empty sheets with the same area in the empty foil area of the pole piece, and weighing to obtain G2;
step S4, calculating the residual coating weight G3 of the groove after laser cleaning according to the G1 and the G2, judging whether the G3 is in a preset safety weight range, adjusting the laser cleaning power according to whether the G3 is in the preset safety weight range to obtain a final value W0, and if the G3 is larger than the maximum value of the preset safety weight range, increasing the laser power; if G3 is smaller than the minimum value of the preset safe weight range, reducing the laser power;
the pole piece comprises a slot position area and an empty foil area, wherein one surface of the slot position area is coated with a coating, the other surface of the slot position area is an empty foil, and both side surfaces of the empty foil area are both empty foils.
According to the pole piece laser cleaning power adjusting method, firstly, a groove position area is cleaned, a cleaning sheet G1 is obtained through weighing, then the weight G2 of the empty sheet obtained through cutting of an empty foil area is reduced, the residual coating weight G3 after laser cleaning is calculated according to G1-G2, the residual coating weight G3 reflects the laser cleaning degree, if the laser cleaning degree is too large, active substances on the surface of a current collector are evaporated or sublimated after absorbing laser, and excessive energy can contact the current collector, so that the current collector is broken or damaged, and the situation of breakage or cold welding can occur during tab welding.
Through verification, the weight G3 of the residual active substances after laser cleaning is more than 0.1mg/154.025mm 2 And the bottom current collector can be prevented from being damaged by laser. When the active material on the surface of the current collector is cleaned by laser, certain van der Waals force exists between the active material and the surface of the current collector, if the cleaning power is too low, the active material on the surface of the current collector cannot be evaporated or sublimated, so that more active material remains, and the active material can cause cold welding when the tabs are welded. Through verification, the weight G3 of the residual active substance after laser cleaning is less than 1mg/154.025mm 2 And can ensure that no cold joint occurs during tab welding. Preset unit area of 154.025mm 2 . Gold orange Ezcad laser control software was used.
Preferably, the preset safe weight range in step S4 is 0.1-1 mg. The preset safe weight range is 0.3-0.7 mg, 0.4-0.6 mg.
Preferably, the laser power is reduced in the step S4 in a range of 1 to 3W. When the laser power is reduced, the laser power is reduced by 1W, 1.5W, 2W, 2.5W, or 3W each time.
Preferably, the range of increasing the laser power in the step S4 is 1 to 5W. When the laser power is increased, the laser power is increased by 1W, 1.5W, 2W, 2.5W, 3W, 3.5W, 4W, 4.5W, or 5W each time.
Preferably, the cleaning sheet in step S3 includes a first sheet, a second sheet and a third sheet, where the weight of the first sheet is G01, the weight of the second sheet is G02, and the weight of the third sheet is G03, and the average value of G01, G02 and G03 is calculated to be G1. And cutting three sheets in the groove position area, and calculating an average value to obtain a more accurate weight average value.
Preferably, the hollow sheets in step S3 include a first hollow sheet, a second hollow sheet and a third hollow sheet, the weight of the first hollow sheet is G04, the weight of the second hollow sheet is G05, the weight of the third hollow sheet is G06, and the average value of G04, G05 and G06 is calculated to be G2. Three empty sheets are cut out of the empty foil area, and an average value is calculated, so that the obtained weight uniformity value is more accurate.
Preferably, before the laser cleaning in step S1, the method further includes previewing the slot area of the pole piece to determine the position of the slot area. When previewing the slot area of the pole piece, the red light previewing function is started, so that the cleaning position is more accurately and conveniently determined.
Preferably, the length of the groove position area is 20-30 mm, the width is 10-25 mm, and the preset unit area in the step S3 is 120-160 mm 2 . The preset unit area is smaller than the area of the slot position area, so that sampling is conveniently performed on the area of the slot position area.
Preferably, the laser power in the step S1 is 58 to 65W. Preferably, the laser power is 58W, 60W, 62W, 63W, 64W, 65W.
The present application will be described in further detail with reference to the following specific embodiments, but the embodiments of the present application are not limited thereto.
Example 1
A pole piece laser cleaning power adjusting method, as shown in figure 1, comprises the following steps:
step one: the length, width and power of the slot are set on the laser cleaning software, then a red light preview function is started (cleaning position is conveniently found), and as shown in fig. 2 and 3, the slot length is set to be 24mm, and the slot width is set to be 20mm. The laser cleaning power was 60W.
Step two: the pole piece is clicked, so that the red light preview area is in a state that the A surface is a coating layer and the B surface is an empty aluminum foil, active substances in the area are subjected to A-surface laser cleaning, the laser cleaning power is 60W, and then the second groove position and the third groove position are clicked for a certain distance;
step three: cutting the cleaned groove position areas 1, 2 and 3 by a ceramic knife, and punching the areas by punching equipment, wherein the preset unit area is 154.025mm respectively as shown in figure 4 2 A small wafer cleaning sheet A, B, C;
step four: weighing the small wafer A, B, C by using an electronic balance to obtain G01, G02 and G03, and then taking an average value to obtain the sum of the coating weight and the current collector weight, and marking the sum as G1;
step five: cutting a section of current collector with a ceramic knife and no active substance coated on the A/B surface, and punching the region with punching equipment to obtain 154.025mm 2 A small wafer D, E, F of (a);
step six: and weighing the small wafer D, E, F by using an electronic balance to obtain G04, G05 and G06, taking an average value to obtain the weight of the current collector, marking the weight of the current collector as G2, further obtaining the residual coating weight G3 after laser cleaning by using G1-G2, and adjusting the laser cleaning power by judging whether the weight of the residual coating weight G3 is within a preset safe weight range or not and the preset safe weight range is 0.1-1 mg. Adjusting the laser power W1 according to whether the G3 is in a preset safety weight range, and if the G3 is larger than 1mg of the preset safety weight range, increasing the laser power; if G3 is smaller than the preset safe weight range of 0.1mg, reducing the laser power;
further, the active material in the coating is a ternary positive electrode material.
Further, the laser cleaning instrument is an SPI.
Further, the base material is copper foil.
Example 2
The difference from example 1 is that: the laser cleaning instrument is an IPG.
The remainder is the same as in example 1 and will not be described again here.
Example 3
The difference from example 1 is that: the preset safe weight range is 0.3-0.7 mg.
The remainder is the same as in example 1 and will not be described again here.
According to the embodiment 1-3, the laser regulated by the pole piece laser cleaning power regulating method is more suitable for cleaning the pole piece, the surface of the current collector is not damaged during cleaning, and the coating is not cleaned in place.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the application pertains from the foregoing disclosure and teachings. Therefore, the present application is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present application in any way.
Claims (9)
1. The method for adjusting the laser cleaning power of the pole piece is characterized by comprising the following steps of:
step S1, carrying out laser cleaning on one surface of a groove area of a pole piece, which is provided with a coating, wherein the initial value of laser cleaning power is W1;
s2, cutting a cleaning sheet with a preset unit area in a groove area of the pole piece, and weighing to obtain G1;
s3, cutting empty sheets with the same area in the empty foil area of the pole piece, and weighing to obtain G2;
step S4, calculating the residual coating weight G3 of the groove position area after laser cleaning according to the G1 and the G2, judging whether the G3 is in a preset safety weight range, adjusting the laser cleaning power according to whether the G3 is in the preset safety weight range to obtain a final value W0, and if the G3 is larger than the maximum value of the preset safety weight range, increasing the laser power; if G3 is smaller than the minimum value of the preset safe weight range, reducing the laser power;
wherein, the preset safe weight range in the step S4 is 0.1-1 mg; the pole piece comprises a slot area and an empty foil area, wherein one surface of the slot area is coated with a coating, the other surface of the slot area is provided with an empty foil, and two side surfaces of the empty foil area are both provided with empty foils.
2. The method according to claim 1, wherein the laser power is reduced in the step S4 by 1-3W.
3. The method according to claim 1, wherein the range of increasing the laser power in step S4 is 1-5W.
4. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the cleaning sheets in the step S2 include a first sheet, a second sheet and a third sheet, the weight of the first sheet is G01, the weight of the second sheet is G02, the weight of the third sheet is G03, and the average value of G01, G02 and G03 is calculated as G1.
5. The method of adjusting the laser cleaning power of the pole piece according to claim 4, wherein the hollow sheet in the step S3 includes a first hollow sheet, a second hollow sheet and a third hollow sheet, the weight of the first hollow sheet is G04, the weight of the second hollow sheet is G05, the weight of the third hollow sheet is G06, and the average value of G04, G05 and G06 is calculated to be G2.
6. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the step S1 further comprises previewing the slot area of the pole piece to determine the position of the slot area before the laser cleaning.
7. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the length of the slot area is 20-30 mm and the width is 10-25 mm.
8. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the preset unit area in the step S2 is 120-160 mm 2 。
9. The method according to claim 1, wherein the laser cleaning power in the step S1 is initially 58-65W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210422497.0A CN114833142B (en) | 2022-04-21 | 2022-04-21 | Pole piece laser cleaning power adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210422497.0A CN114833142B (en) | 2022-04-21 | 2022-04-21 | Pole piece laser cleaning power adjusting method |
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| Publication Number | Publication Date |
|---|---|
| CN114833142A CN114833142A (en) | 2022-08-02 |
| CN114833142B true CN114833142B (en) | 2023-10-31 |
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| CN202210422497.0A Active CN114833142B (en) | 2022-04-21 | 2022-04-21 | Pole piece laser cleaning power adjusting method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084573A (en) * | 2011-11-04 | 2013-05-08 | 阿尔斯通技术有限公司 | Process for production of articles made of gamma-prime precipitation-strengthened nickel-base superalloy by selective laser melting (SLM) |
| CN109080134A (en) * | 2018-07-25 | 2018-12-25 | 沈阳精合数控科技开发有限公司 | By the Method of printing and device that adjust laser power control shaping speed |
| CN112792006A (en) * | 2020-12-29 | 2021-05-14 | 比亚迪股份有限公司 | Method and equipment for removing pole piece active substances |
| CN113458087A (en) * | 2021-06-30 | 2021-10-01 | 惠州锂威新能源科技有限公司 | Method for cleaning pole piece by laser |
-
2022
- 2022-04-21 CN CN202210422497.0A patent/CN114833142B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084573A (en) * | 2011-11-04 | 2013-05-08 | 阿尔斯通技术有限公司 | Process for production of articles made of gamma-prime precipitation-strengthened nickel-base superalloy by selective laser melting (SLM) |
| CN109080134A (en) * | 2018-07-25 | 2018-12-25 | 沈阳精合数控科技开发有限公司 | By the Method of printing and device that adjust laser power control shaping speed |
| CN112792006A (en) * | 2020-12-29 | 2021-05-14 | 比亚迪股份有限公司 | Method and equipment for removing pole piece active substances |
| CN113458087A (en) * | 2021-06-30 | 2021-10-01 | 惠州锂威新能源科技有限公司 | Method for cleaning pole piece by laser |
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| CN114833142A (en) | 2022-08-02 |
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