CN112467080A - Preparation method of embedded tab groove - Google Patents
Preparation method of embedded tab groove Download PDFInfo
- Publication number
- CN112467080A CN112467080A CN202011317700.5A CN202011317700A CN112467080A CN 112467080 A CN112467080 A CN 112467080A CN 202011317700 A CN202011317700 A CN 202011317700A CN 112467080 A CN112467080 A CN 112467080A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- embedded
- groove
- tab
- lug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 239000011888 foil Substances 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 239000013543 active substance Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 17
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 12
- 229920013716 polyethylene resin Polymers 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920005668 polycarbonate resin Polymers 0.000 claims description 3
- 239000004431 polycarbonate resin Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 description 7
- 239000003292 glue Substances 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000005187 foaming Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000005405 multipole Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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 preparation method of an embedded tab groove. The preparation method of the embedded tab groove comprises the following steps: the method comprises the following steps: determining the specific position and size of a lug groove on a pole piece; step two: heating and melting the thermoplastic resin with the low softening point, coating the thermoplastic resin on the pole piece at the position of the lug groove determined in the first step, and carrying out the next step after the thermoplastic resin is cooled; step three: coating the pole piece obtained in the second step with active substances; step four: drying the pole piece obtained in the step three, and melting the low-softening-point thermoplastic resin so as to fall off the foil, thereby forming an embedded pole lug groove on the pole piece; step five: and welding a tab in the tab groove to obtain the pole piece with the embedded tab. The preparation method of the embedded tab groove has the advantages of simple equipment, low investment cost, high pole piece production goodness and the like.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of an embedded tab groove.
Background
At present, in the preparation process of a lithium ion battery pole piece, a pole lug groove for welding a pole lug position is usually reserved on the pole piece, and the current common method for preparing the pole lug groove comprises the following steps: intermittent coating is adopted: in the coating process, a certain area is selected and not coated, so that the tab groove can be formed, but the method cannot be applied to the embedded tab. Cleaning the coating by laser: the coating is subjected to photophysical reaction by adopting high-intensity laser to realize the cleaning effect of the coating, but the high-intensity laser easily burns a pole piece, particularly a positive aluminum foil to oxidize the aluminum foil or cause perforation of the aluminum foil. In addition, the cost of the laser equipment is high, which causes the manufacturing cost of the lithium ion battery to be increased. Removing the coating by adopting a scraping blade: the method for directly scraping the coating by using the scraper has the advantages that the speed of the scraper, the force of the scraper and the distance between the scraper and the base foil are difficult to control, the foil is easily scratched or the coating is not uniformly removed, so that the production yield of the pole piece is influenced. Removing the coating by adopting foaming glue: and adhering foaming glue to the reserved position of the pole piece, coating and baking, wherein the foaming glue can expand and separate from the foil in the baking process, so that a lug groove is formed. However, the foaming adhesive used by the method is unstable, and expands during baking to easily cause extrusion deformation on the surrounding coating, thereby affecting the quality of the pole piece and reducing the production yield. Cleaning the coating with a solvent: and coating a layer of solvent for cleaning the coating on the coating to strip the coating. The method has the advantages of wide solvent diffusion range and high diffusion speed, and the sizes of the lug grooves are difficult to control.
Disclosure of Invention
Therefore, in order to solve the above problems, it is necessary to provide a method for manufacturing an embedded tab groove, where the method has the advantages of simple equipment, low investment cost, high yield of pole piece production, and the like:
in order to achieve the above object, the present invention provides the following technical solutions
A preparation method of an embedded tab groove comprises the following steps:
the method comprises the following steps: determining the specific position and size of a lug groove on a pole piece;
step two: heating and melting the thermoplastic resin with the low softening point, coating the thermoplastic resin on the pole piece at the position of the lug groove determined in the first step, and carrying out the next step after the thermoplastic resin is cooled;
step three: coating the pole piece obtained in the second step with active substances;
step four: drying the pole piece obtained in the step three, and melting the low-softening-point thermoplastic resin so as to fall off the foil, thereby forming an embedded pole lug groove on the pole piece;
step five: and welding a tab in the tab groove to obtain the pole piece with the embedded tab.
Furthermore, the position of the lug groove is any position of the pole piece.
Furthermore, the position of the lug groove is the middle position of the pole piece.
Further, the low softening point thermoplastic resin is any one of a vinyl acetate resin, a polyethylene resin, a polypropylene resin, and a polycarbonate resin.
Further, the low softening point thermoplastic resin is a vinyl acetate resin or a polyvinyl alcohol resin.
Further, the drying temperature is 50 to 200 ℃.
Further, the drying temperature of the pole piece is 80-120 ℃.
Further, the length of the tab groove is greater than that of the tab, and the width of the tab groove is greater than that of the tab.
Compared with the prior art, the preparation method of the embedded tab groove has the following advantages: 1. by adopting the invention, the quantity of active substances on the pole piece can be further improved by utilizing the embedded pole lug, so that the energy density of the lithium ion battery is improved; 2. the equipment used for preparing the embedded pole lug can be replaced with the existing equipment for preparing the pole piece, and only the coating of the thermoplastic resin with low softening point is needed to be added, so that the process is simple, the input cost is low, and the excellent rate of the pole piece production is high. 3. The process for preparing the embedded lug groove by using the method is more controllable, and the foil is not damaged.
Drawings
Fig. 1 is a flowchart illustrating a conventional method for manufacturing a groove of an embedded tab;
fig. 2 is a schematic structural view of a pole piece of the method for manufacturing the embedded tab groove shown in fig. 1;
fig. 3 is a schematic structural view of a multi-pole piece of the method for manufacturing the embedded tab groove shown in fig. 1.
Description of the figures
The tab glue comprises a tab glue 1, a tab 2, a tab groove 3 and a pole piece 4.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, the present invention provides a method for manufacturing a groove of an embedded tab, which is characterized by comprising the following steps:
the method comprises the following steps: and determining the specific position and size of the lug groove 3 on the pole piece 4.
Step two: and (3) heating and melting the thermoplastic resin with the low softening point, coating the thermoplastic resin on the pole piece at the position of the lug groove determined in the first step, and carrying out the next step after the thermoplastic resin is cooled.
Step three: and D, coating the pole piece obtained in the step two with active substances.
Step four: and (4) drying the pole piece obtained in the step three, and melting the thermoplastic resin with the low softening point so as to fall off the foil, thereby forming an embedded pole lug groove on the pole piece.
Step five: and welding the lug 2 in the lug groove to obtain the pole piece with the embedded lug.
And the tab is also provided with tab glue 1.
The position of the lug groove can be any position of the pole piece, and the size can be adjusted according to the size of the lug.
Wherein, any one of vinyl acetate resin, polyethylene resin, polypropylene resin and polycarbonate resin.
Wherein, the drying temperature is as follows: 50 to 200 ℃.
The length of the lug groove is greater than that of the lug, and the width of the lug groove is greater than that of the lug.
Wherein, L is the length of utmost point ear recess, and D is the degree of depth of utmost point ear recess, and H is utmost point ear length, and D is utmost point ear width.
Preferably, the position of the lug groove in the first step is the middle part of the pole piece;
preferably, the thermoplastic resin having a low softening point is a vinyl acetate resin or polyvinyl alcohol.
Preferably, the drying temperature of the pole piece is 80-120 ℃.
Preferably, the molten thermoplastic resin remaining on the pole piece may be further washed using a cleaning device.
Please refer to the following embodiments:
example 1
As shown in fig. 1 and fig. 2, the method for manufacturing the embedded tab groove of the present embodiment includes the following steps:
the method comprises the following steps: selecting the embedded pole lug position as one third of the pole piece, wherein the width of the embedded pole lug position is 10mm, and the length of the embedded pole lug position is 25 mm;
step two: heating the vinyl acetate resin to 120 ℃ for melting, coating the vinyl acetate resin on the position of the lug groove determined in the first step on the pole piece by using a brushing method, and carrying out the next step after the thermoplastic resin is naturally cooled;
step three: coating the pole piece obtained in the step two with a lithium cobaltate active substance;
step four: drying the pole piece obtained in the third step at the temperature of 100 ℃ to melt the vinyl acetate resin, so that the vinyl acetate resin falls off from the foil, and an embedded lug groove is formed on the pole piece;
step five: carrying out secondary cleaning on the pole pieces by utilizing brush dust removal on the residual vinyl acetate resin on the four pole pieces in the step to ensure that no residue exists on the pole pieces, and then carrying out the next step;
step six: and welding a lug with the width of 5mm and the length of 25mm in a lug groove, and exposing the lug for 7mm to obtain the pole piece with the embedded lug.
Example 2
As shown in fig. 3, the method for manufacturing the multi-pole-piece embedded tab groove of the embodiment includes the following steps:
the method comprises the following steps: selecting the embedded pole lug position as one third of the pole piece, wherein the width of the embedded pole lug position is 10mm, and the length of the embedded pole lug position is 25 mm;
step two: heating the polyethylene resin to 100 ℃ for melting, coating the polyethylene resin on the pole piece at the position of the lug groove determined in the first step by using a brushing method, and carrying out the next step after the polyethylene resin is naturally cooled;
step three: coating the pole piece obtained in the step two with a lithium cobaltate active substance;
step four: drying the pole piece obtained in the third step at the temperature of 100 ℃ to melt the polyethylene resin, so that the polyethylene resin falls off from the foil, and an embedded pole lug groove is formed on the pole piece;
step five: carrying out secondary cleaning on the pole pieces by utilizing brush dust removal on the residual vinyl acetate resin on the four pole pieces in the step to ensure that no residue exists on the pole pieces, and then carrying out the next step;
step six: and welding a 5mm wide and 25mm long tab in a tab groove, and exposing the tab for 7mm to obtain the multi-pole piece with the embedded tab.
Compared with the prior art, the preparation method of the embedded tab groove has the following advantages: 1. by adopting the invention, the quantity of active substances on the pole piece can be further improved by utilizing the embedded pole lug, so that the energy density of the lithium ion battery is improved; 2. the equipment used for preparing the embedded pole lug can be replaced with the existing equipment for preparing the pole piece, and only the coating of the thermoplastic resin with low softening point is needed to be added, so that the process is simple, the input cost is low, and the excellent rate of the pole piece production is high. 3. The process for preparing the embedded lug groove by using the method is more controllable, and the foil is not damaged.
The above description is only for the purpose of illustrating specific embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and all equivalent changes and modifications made in accordance with the spirit of the present invention should be considered as falling within the scope of the present invention.
Claims (8)
1. A preparation method of an embedded tab groove is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: determining the specific position and size of a lug groove on a pole piece;
step two: heating and melting the thermoplastic resin with the low softening point, coating the thermoplastic resin on the pole piece at the position of the lug groove determined in the first step, and carrying out the next step after the thermoplastic resin is cooled;
step three: coating the pole piece obtained in the second step with active substances;
step four: drying the pole piece obtained in the step three, and melting the low-softening-point thermoplastic resin so as to fall off the foil, thereby forming an embedded pole lug groove on the pole piece;
step five: and welding a tab in the tab groove to obtain the pole piece with the embedded tab.
2. The method for manufacturing the embedded tab groove according to claim 1, wherein: the position of the lug groove is any position of the pole piece.
3. The method for manufacturing the embedded tab groove according to claim 1, wherein: the position of the lug groove is the middle position of the pole piece.
4. The method for manufacturing the embedded tab groove according to claim 1, wherein: the low-softening-point thermoplastic resin is any one of a vinyl acetate resin, a polyethylene resin, a polypropylene resin and a polycarbonate resin.
5. The method for manufacturing the embedded tab groove according to claim 1, wherein: the low-softening-point thermoplastic resin is vinyl acetate resin or polyvinyl alcohol resin.
6. The method for manufacturing the embedded tab groove according to claim 1, wherein: the drying temperature is 50 to 200 ℃.
7. The method for manufacturing the embedded tab groove according to claim 1, wherein: the drying temperature of the pole piece is 80-120 ℃.
8. The method for manufacturing the embedded tab groove according to claim 1, wherein: the length of the lug groove is greater than that of the lug, and the width of the lug groove is greater than that of the lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317700.5A CN112467080A (en) | 2020-11-23 | 2020-11-23 | Preparation method of embedded tab groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317700.5A CN112467080A (en) | 2020-11-23 | 2020-11-23 | Preparation method of embedded tab groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112467080A true CN112467080A (en) | 2021-03-09 |
Family
ID=74798753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011317700.5A Pending CN112467080A (en) | 2020-11-23 | 2020-11-23 | Preparation method of embedded tab groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112467080A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023036267A1 (en) * | 2021-09-09 | 2023-03-16 | 珠海冠宇电池股份有限公司 | Battery electrode plate, battery, and method for manufacturing battery electrode plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6152971A (en) * | 1996-11-06 | 2000-11-28 | Dai Nippon Printing Co., Ltd. | Electrode plate for secondary battery with nonaqueous electrolyte and process for producing same |
| JP2000331674A (en) * | 1999-05-20 | 2000-11-30 | Dainippon Printing Co Ltd | Electrode plate for nonaqueous electrolyte secondary battery and intermediate product thereof, and manufacture thereof |
| US6162264A (en) * | 1996-06-17 | 2000-12-19 | Dai Nippon Printing Co., Ltd. | Process for producing porous coating layer electrode plate for secondary battery with nonaqueous electrolyte process for producing same and sheet for peeling active material layer |
| JP2001043848A (en) * | 1999-07-28 | 2001-02-16 | Sony Corp | Manufacture of polymer battery and peeling device |
| CN109414907A (en) * | 2016-06-06 | 2019-03-01 | 昭和电工包装株式会社 | The manufacturing method of laminate |
-
2020
- 2020-11-23 CN CN202011317700.5A patent/CN112467080A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6162264A (en) * | 1996-06-17 | 2000-12-19 | Dai Nippon Printing Co., Ltd. | Process for producing porous coating layer electrode plate for secondary battery with nonaqueous electrolyte process for producing same and sheet for peeling active material layer |
| US6152971A (en) * | 1996-11-06 | 2000-11-28 | Dai Nippon Printing Co., Ltd. | Electrode plate for secondary battery with nonaqueous electrolyte and process for producing same |
| JP2000331674A (en) * | 1999-05-20 | 2000-11-30 | Dainippon Printing Co Ltd | Electrode plate for nonaqueous electrolyte secondary battery and intermediate product thereof, and manufacture thereof |
| JP2001043848A (en) * | 1999-07-28 | 2001-02-16 | Sony Corp | Manufacture of polymer battery and peeling device |
| CN109414907A (en) * | 2016-06-06 | 2019-03-01 | 昭和电工包装株式会社 | The manufacturing method of laminate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023036267A1 (en) * | 2021-09-09 | 2023-03-16 | 珠海冠宇电池股份有限公司 | Battery electrode plate, battery, and method for manufacturing battery electrode plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10981251B2 (en) | Method and device for cutting sapphire | |
| WO2022017315A1 (en) | Electrode sheet slotting method and device | |
| CN103443965A (en) | Battery electrode and a method for producing same | |
| CN103503216A (en) | Battery electrode and method for producing same | |
| JP6408577B2 (en) | Electrochromic device contact | |
| CN112467080A (en) | Preparation method of embedded tab groove | |
| JP2019523129A (en) | Application method of electric conductor of solar cell | |
| US20170170455A1 (en) | Method for removing coating layer of electrode plate | |
| CN112382735B (en) | Method for preparing lithium ion battery pole piece by laser cleaning | |
| JP5017995B2 (en) | Method for manufacturing electrode plate for lithium secondary battery, electrode plate for lithium secondary battery and lithium secondary battery using the method | |
| US11626613B2 (en) | Battery cell, electrochemical device and manufacturing method thereof | |
| CN112038558B (en) | Pole piece coating scraping system and pole piece coating scraping method | |
| CN112670435A (en) | Preparation method of battery pole piece | |
| CN102270647B (en) | Image sensor device and methods for forming same | |
| CN112670437A (en) | Preparation method of battery pole piece | |
| CN101310390B (en) | Method and apparatus for processing of substrates having laser-written trench contacts, in particular solar cells | |
| JP2000208134A (en) | Nonaqueous electrolyte secondary battery electrode and manufacture thereof | |
| CN204204946U (en) | Disc type aluminium-to-nickel lug | |
| CN113224373A (en) | Lithium ion battery with measurable internal temperature and manufacturing method thereof | |
| CN214753841U (en) | Adhesive paper for tab slot position and pole piece comprising slot position | |
| CN114552138A (en) | High-reliability soft package battery tab and preparation method thereof | |
| CN107020275B (en) | Method for directionally cleaning pole piece and application of pole piece in battery | |
| CN111847079A (en) | Method for manufacturing automatic roll type adhesive tape | |
| JP2005235508A (en) | Lithium-ion secondary battery and its manufacturing method | |
| CN110900001A (en) | High-efficiency laser pole piece cutting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210309 |
|
| RJ01 | Rejection of invention patent application after publication |