CN114833142A - Pole piece laser cleaning power adjusting method - Google Patents
Pole piece laser cleaning power adjusting method Download PDFInfo
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- CN114833142A CN114833142A CN202210422497.0A CN202210422497A CN114833142A CN 114833142 A CN114833142 A CN 114833142A CN 202210422497 A CN202210422497 A CN 202210422497A CN 114833142 A CN114833142 A CN 114833142A
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- pole piece
- laser cleaning
- area
- laser
- sheet
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Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000011888 foil Substances 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 238000005303 weighing Methods 0.000 claims abstract description 10
- 230000002950 deficient Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000013543 active substance Substances 0.000 description 11
- 238000003466 welding Methods 0.000 description 9
- 238000004080 punching Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 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
- 238000012795 verification Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 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
- 239000010406 cathode material 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
- 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
Images
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
Abstract
The invention 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, the pole piece comprises a slot area and a hollow foil area; s2, carrying out laser cleaning on one surface of the slot position 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 slot position 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 step S5, calculating the weight G3 of the residual coating of the slot after laser cleaning according to G1 and G2, and adjusting the laser power according to G3. The pole piece laser cleaning power adjusting method 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 laser cleaning are prevented from flowing into the subsequent process, and the product quality is improved.
Description
Technical Field
The invention 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 has the advantages of large energy density, long cycle life, high platform voltage, good safety performance and the like, and is widely applied to the fields of energy storage, 3C, new energy vehicles and the like.
At present, a laser cleaning process is mainly applied to cleaning coated cathode and anode plates in the manufacturing process of a lithium ion battery, so that small slots for welding tabs are manufactured, the thickness of a current collector bearing slurry is thinner and thinner, if the power during laser cleaning is not controlled, the current collector is easily damaged and penetrated due to overlarge laser power or cannot be cleaned due to undersize laser power, so that the subsequent tab welding process is influenced by the overlarge or undersize laser power during cleaning, however, the laser cleaning precision is higher, whether laser cleaning is suitable or not is difficult to find in the cleaning process, and the laser power is difficult to adjust, so that a defective point cannot be found until a finished product is found in the subsequent welding process after cleaning the current collector, and the production quality and the cost are seriously influenced.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the pole piece laser cleaning power adjusting method is provided, the laser cleaning power can be adjusted, the laser cleaning quality is good, defective products after laser cleaning are prevented from flowing into the subsequent process, and the product quality is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pole piece laser cleaning power adjusting method comprises the following steps:
s1, carrying out laser cleaning on one surface of the pole piece with the coating in the slot position area, wherein the initial value of the laser cleaning power is W1;
s2, cutting a cleaning sheet with a preset unit area in a slot position 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 weight G3 of the coating left after the slot is subjected to laser cleaning according to G1 and G2, judging whether G3 is in a preset safe weight range, adjusting the laser cleaning power according to whether G3 is in the preset safe weight range to obtain a final value W0, and increasing the laser power if G3 is larger than the maximum value of the preset safe weight range; if G3 is less than the minimum value of the preset safe weight range, reducing the laser power;
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 an empty foil, and both side surfaces of the empty foil area are empty foils.
Preferably, the preset safe weight range in the 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 step S4 is 1-5W.
Preferably, the cleaning sheet in the step S2 includes 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, that is, G1.
Preferably, the step S3 includes that the hollow sheets include a first hollow sheet, a second hollow sheet and a third hollow sheet, the first hollow sheet has a weight of G04, the second hollow sheet has a weight of G05, and the third hollow sheet has a weight of G06, and an average value of G04, G05 and G06 is calculated, that is, G2.
Preferably, before performing the laser cleaning in step S1, the method further includes previewing the slot region of the pole piece, and determining the position of the slot region.
Preferably, the length of the groove position area is 20-30 mm, and the width of the groove position area is 10-25 mm.
Preferably, the unit area preset in the step S2 is 120-160 mm 2 。
Preferably, the initial value of the laser cleaning power in the step S1 is 58-65W.
Compared with the prior art, the invention has the beneficial effects that: according to the pole piece laser cleaning power adjusting method, the laser cleaning power can be adjusted by judging the residual weight of the slot position after laser cleaning, so that the laser cleaning is more accurate, a current collector is not damaged or cannot be cleaned unclean 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 method for adjusting the laser cleaning power of a pole piece according to the present invention.
FIG. 2 is a schematic view of a pole piece of the present invention.
FIG. 3 is a schematic diagram of the power adjustment of the pole piece for laser cleaning according to the present invention.
Fig. 4 is a schematic view of the present invention punching out a cleaning sheet.
Detailed Description
1. A pole piece laser cleaning power adjusting method comprises the following steps:
s1, carrying out laser cleaning on one surface of the pole piece with the coating in the slot position area, wherein the initial value of the laser cleaning power is W1;
s2, cutting a cleaning sheet with a preset unit area in a slot position 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 weight G3 of the residual coating after the groove is subjected to laser cleaning according to G1 and G2, judging whether G3 is in a preset safe weight range, adjusting the laser cleaning power according to whether G3 is in the preset safe weight range to obtain a final value W0, and if G3 is larger than the maximum value of the preset safe weight range, increasing the laser power; if G3 is less than the minimum value of the preset safe weight range, reducing the laser power;
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 an empty foil, and both side surfaces of the empty foil area are empty foils.
According to the pole piece laser cleaning power adjusting method, a slot position area is cleaned firstly, a cleaning sheet material G1 is obtained through weighing, the weight G2 of an empty sheet material obtained through cutting of an empty foil area is reduced, the weight G3 of a residual coating after laser cleaning is calculated according to G1-G2, the weight G3 of the residual coating 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, redundant energy can contact the current collector, the current collector is broken or damaged, and accordingly the situation of damage or false welding can occur during welding of a pole lug.
Through verification, the weight G3 of the residual active substance after laser cleaning is more than 0.1mg/154.025mm 2 The bottom current collector can be prevented from being damaged by laser. When the active substances on the surface of the current collector are cleaned by laser, certain van der waals force exists between the active substances and the current collector because the active substances are coated on the surface of the current collector, if the cleaning power is too low, the active substances on the surface of the current collector cannot be evaporated or sublimated, so that more residual active substances are generated, and the false welding can be generated during tab welding. Through verification, the weight G3 of the residual active substance after laser cleaning is less than 1mg/154.025mm 2 Can ensure that the false welding does not occur during the welding of the pole lug. The preset unit area is 154.025mm 2 . Gold orange Ezcad laser control software was used.
Preferably, the preset safe weight range in the step S4 is 0.1-1 mg. The preset safe weight ranges are 0.3-0.7 mg and 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 step S4 is 1-5W. 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 the step S3 includes 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, that is, G1. Three sheets are cut out of the groove position area, the average value is calculated, and the obtained weight average value is more accurate.
Preferably, the step S3 includes that the hollow sheets 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, and the weight of the third hollow sheet is G06, and the average value of G04, G05 and G06 is calculated, that is, G2. And cutting three empty sheets in the empty foil area, and calculating an average value to obtain a more accurate weight uniformity value.
Preferably, before performing the laser cleaning in step S1, the method further includes previewing the slot region of the pole piece, and determining the position of the slot region. When the slot position area of the pole piece is previewed, the red light previewing function is started, so that the cleaning position can be determined more accurately and conveniently.
Preferably, the length of the slot area is 20-30 mm, the width of the slot area is 10-25 mm, and the unit area preset in the step S3 is 120-160 mm 2 . The preset unit area is smaller than the area of the groove area, so that the sampling is convenient to be carried out in the area of the groove area.
Preferably, the laser power in the step S1 is 58-65W. Preferably, the laser power is 58W, 60W, 62W, 63W, 64W, 65W.
The present invention will be described in further detail with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.
Example 1
A pole piece laser cleaning power adjusting method is shown in figure 1 and comprises the following steps:
the method comprises the following steps: the length and width of the slot position and the power are set on the laser cleaning software, then the red light preview function (convenient for finding the cleaning position) is started, and as shown in fig. 2 and 3, the length of the slot position is 24mm, and the width is 20 mm. The laser cleaning power is 60W.
Step two: inching the pole piece to enable the red light preview area to be in a state that the surface A is a coating and the surface B is an empty aluminum foil, carrying out surface A laser cleaning on active substances in the area, wherein the laser cleaning power is 60W, and then inching for a certain distance to clean a second slot position and a third slot position;
step three: cutting the cleaned slot position areas 1, 2 and 3 by using a ceramic knife, and punching the areas by using punching equipment to obtain 154.025mm preset unit areas respectively as shown in figure 4 2 Small disc cleaning sheet A, B, C;
step four: weighing the small round sheet A, B, C by using an electronic balance to obtain G01, G02 and G03, and then averaging to obtain the sum of the weight of the coating and the weight of the current collector as G1;
step five: cutting a section of current collector with A/B surfaces not coated with active substances by using a ceramic knife, and punching the area by using a punching device to respectively obtain current collectors with the areas of 154.025mm 2 Small circle D, E, F;
step six: the small round piece D, E, F is weighed by an electronic balance to obtain G04, G05 and G06, then the average value is taken to obtain the weight of the current collector and record as G2, further G1-G2 obtains the weight of the residual coating after laser cleaning G3, whether the weight of the residual coating G3 is within a preset safe weight range is determined, and the preset safe weight range is 0.1-1 mg, so that the laser cleaning power is adjusted. Adjusting the laser power W1 according to whether G3 is within a preset safe weight range, and if G3 is larger than the preset safe weight range by 1mg, increasing the laser power; if G3 is less than the preset safe weight range of 0.1mg, reducing the laser power;
further, the active substance in the coating is a ternary cathode material.
Further, the laser cleaning instrument is an SPI.
Further, the base material is a copper foil.
Example 2
The difference from example 1 is that: the laser cleaning instrument is an IPG.
The rest is the same as embodiment 1, and the description is omitted here.
Example 3
The difference from example 1 is that: the preset safe weight range is 0.3-0.7 mg.
The rest is the same as embodiment 1, and the description is omitted here.
The embodiments 1 to 3 show that the laser adjusted by the pole piece laser cleaning power adjusting method is more suitable for cleaning the pole piece, the surface of the current collector is not damaged by cleaning, and the coating cannot be cleaned in place.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A pole piece laser cleaning power adjusting method is characterized by comprising the following steps:
s1, carrying out laser cleaning on one surface of the pole piece with the coating in the slot position area, wherein the initial value of the laser cleaning power is W1;
s2, cutting a cleaning sheet with a preset unit area in a slot position 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 weight G3 of the coating left after the slot is subjected to laser cleaning according to G1 and G2, judging whether G3 is in a preset safe weight range, adjusting the laser cleaning power according to whether G3 is in the preset safe weight range to obtain a final value W0, and increasing the laser power if G3 is larger than the maximum value of the preset safe weight range; if G3 is less than the minimum value of the preset safe weight range, reducing the laser power;
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 an empty foil, and both side surfaces of the empty foil area are empty foils.
2. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the preset safe weight range in the step S4 is 0.1-1 mg.
3. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the laser power is reduced in the step S4 within a range of 1-3W.
4. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the range of increasing the laser power in the step S4 is 1-5W.
5. 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 to be G1.
6. The pole piece laser cleaning power adjusting method of claim 5, wherein the step S3 includes a first empty sheet, a second empty sheet and a third empty sheet, the weight of the first empty sheet is G04, the weight of the second empty sheet is G05, the weight of the third empty sheet is G06, and the average value of G04, G05 and G06 is calculated to be G2.
7. The method for adjusting the laser cleaning power of a pole piece according to claim 1, wherein before the laser cleaning in step S1, the method further comprises previewing a slot region of the pole piece and determining the position of the slot region.
8. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the slot area has a length of 20-30 mm and a width of 10-25 mm.
9. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the unit area preset in the step S2 is 120-160 mm 2 。
10. The method for adjusting the laser cleaning power of the pole piece according to claim 1, wherein the initial value of the laser cleaning power in the step S1 is 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 |
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| 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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| CN114833142A true CN114833142A (en) | 2022-08-02 |
| CN114833142B CN114833142B (en) | 2023-10-31 |
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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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| CN114833142B (en) | 2023-10-31 |
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