CN109848583B - Battery pole piece cutting-out type device with multiple coating layers - Google Patents
Battery pole piece cutting-out type device with multiple coating layers Download PDFInfo
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- CN109848583B CN109848583B CN201910259349.XA CN201910259349A CN109848583B CN 109848583 B CN109848583 B CN 109848583B CN 201910259349 A CN201910259349 A CN 201910259349A CN 109848583 B CN109848583 B CN 109848583B
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- roller
- cutting
- assembly
- laser die
- discharging
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- 239000011247 coating layer Substances 0.000 title description 2
- 238000005520 cutting process Methods 0.000 claims abstract description 111
- 230000007246 mechanism Effects 0.000 claims abstract description 75
- 238000007599 discharging Methods 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 14
- 239000002699 waste material Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 6
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a multi-coating battery pole piece cutting device, which comprises a discharging mechanism, a cutting mechanism, a roll forming mechanism and a receiving mechanism which are sequentially arranged; the cutting mechanism comprises a first laser die cutting assembly, a second laser die cutting assembly, a feeding roller assembly and a discharging roller assembly, wherein the first laser die cutting assembly is positioned at one side of the second laser die cutting assembly, which is close to the discharging mechanism, the output end of the first laser die cutting assembly is opposite to the feeding roller assembly, and the output end of the second laser die cutting assembly is opposite to the discharging roller assembly; the roll forming mechanism comprises two oppositely arranged press rolls. The invention can avoid excessive tension release of the coating belt, thereby effectively improving the density of the coating belt; according to the invention, all cutting actions are omitted, and cutting and rolling forming are integrated, so that the production efficiency and the input cost can be effectively improved; the two groups of laser die-cutting assemblies can effectively shorten the distance between die-cutting tool marks, so that materials can be effectively saved.
Description
Technical Field
The invention relates to processing of battery pole pieces, and particularly discloses a cutting device for a battery pole piece with multiple coating strips.
Background
The battery pole piece is an indispensable component for forming a battery structure, the battery pole piece is wound to form a battery cell after being manufactured, the cell is put into a shell, electrolyte is injected after a cover plate is welded, and finally the battery is obtained through encapsulation. The performance of the battery is mainly related to the battery cell and the electrolyte, while the performance of the battery cell is mainly dependent on the performance of the battery pole piece.
In order to improve the production efficiency of the battery pole piece, the battery pole piece is coated with a plurality of coating strips, and finally a single independent battery cell pole piece is obtained through slitting. In the prior art, the processing of the battery pole piece sequentially comprises the following steps: coating, rolling, pre-cutting, die cutting and slitting into strips, the production process needs more equipment to be configured, the input cost of the equipment is high, each equipment is independently operated and occupies independent space, the material communication between the equipment needs to be conveyed by a manual conveying or conveying belt, the labor cost and the land cost are high, the production efficiency is low, and in addition, the density of the coating belt after rolling is low due to the fact that the tension is released, so that the quality of a battery pole piece is affected.
Disclosure of Invention
Based on the above, it is necessary to provide a cutting device for a battery pole piece with multiple coating strips, aiming at the problems of the prior art, the obtained battery pole piece has high coating strip density, high production efficiency, low equipment investment cost, small occupied land and capability of effectively saving materials.
In order to solve the problems in the prior art, the invention discloses a multi-coating-belt battery pole piece cutting device, which comprises a discharging mechanism, a cutting mechanism, a roll forming mechanism and a receiving mechanism which are sequentially arranged; the cutting mechanism comprises a first laser die cutting assembly, a second laser die cutting assembly, a feeding roller assembly and a discharging roller assembly, wherein the first laser die cutting assembly is positioned at one side of the second laser die cutting assembly, which is close to the discharging mechanism, the output end of the first laser die cutting assembly is opposite to the feeding roller assembly, and the output end of the second laser die cutting assembly is opposite to the discharging roller assembly; the roll forming mechanism comprises two oppositely arranged press rolls.
Further, the first laser die-cutting assembly comprises p first laser die-cutting blades, the second laser die-cutting assembly comprises q second laser die-cutting blades, and p+q=2n is an integer greater than 1.
Further, the feeding roller assembly comprises a first guide roller, a first limit roller and a second guide roller which are sequentially arranged.
Further, the discharging roller assembly comprises a third guide roller, a second limiting roller and a fourth guide roller which are sequentially arranged.
Further, the discharging roller assembly further comprises a pressing adjusting roller, the pressing adjusting roller is located between the second limiting roller and the fourth guide roller, and a waste material channel is arranged below the second limiting roller and the pressing adjusting roller.
Further, the cutting mechanism further comprises two mechanical cutters, and the two mechanical cutters are positioned on one side of the feeding roller assembly and one side of the discharging roller assembly.
Further, a feeding deviation rectifying mechanism is arranged between the discharging mechanism and the cutting mechanism.
Further, the feeding deviation rectifying mechanism comprises a deviation rectifying roller, and two ends of the deviation rectifying roller are respectively fixed with a limit baffle.
Further, a length measuring mechanism is arranged between the roll forming mechanism and the material receiving mechanism.
Further, the length measuring mechanism comprises a collimation roller and a length measuring roller which are sequentially arranged, the collimation roller and the length measuring roller are positioned on different horizontal planes, and the axis of the length measuring roller is connected with a rotary encoder.
The beneficial effects of the invention are as follows: the invention discloses a cutting device for a battery pole piece with multiple coating strips, wherein a roll forming mechanism is arranged behind the cutting mechanism, so that excessive tension release of the coating strips after rolling can be avoided, the density of the coating strips on the obtained battery pole piece can be effectively improved, and the quality of a battery can be effectively improved; the invention omits all cutting actions and integrates cutting and rolling forming, can effectively improve the production efficiency, reduce the input cost of equipment and has small occupied land for the whole processing equipment; in addition, the precision of laser processing is higher, the cutting is faster, and the distance that the cutting tool trace was separated to the two sets of laser cross cutting subassembly can effectively shorten to can effectively save the material.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a structure of a battery pole piece obtained by cutting and molding according to the present invention.
The reference numerals are: the feeding device comprises a discharging mechanism 10, a cutting mechanism 20, a first laser die-cutting assembly 21, a second laser die-cutting assembly 22, a feeding roller assembly 23, a first guide roller 231, a first limit roller 232, a second guide roller 233, a discharging roller assembly 24, a third guide roller 241, a second limit roller 242, a fourth guide roller 243, a pressing adjusting roller 244, a waste channel 25, a mechanical cutter 26, a roll forming mechanism 30, a press roller 31, a receiving mechanism 40, a feeding deviation correcting mechanism 50, a deviation correcting roller 51, a limit baffle plate 52, a length measuring mechanism 60, a collimating roller 61, a length measuring roller 62 and a rotary encoder 63.
Detailed Description
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
Reference is made to fig. 1 and 2.
The embodiment of the invention discloses a multi-coating-belt battery pole piece cutting device, which is shown in fig. 1 and comprises a discharging mechanism 10, a cutting mechanism 20, a roll forming mechanism 30 and a receiving mechanism 40 which are sequentially arranged along the advancing direction of a battery pole piece, wherein the discharging mechanism 10 comprises a discharging barrel, the receiving mechanism 40 comprises a receiving barrel and a winding motor, and the output end of the winding motor is connected with the receiving barrel; the cutting mechanism 20 comprises a first laser die cutting assembly 21, a second laser die cutting assembly 22, a feeding roller assembly 23 and a discharging roller assembly 24, wherein the first laser die cutting assembly 21 is positioned on one side of the second laser die cutting assembly 22 close to the discharging mechanism 10, the output end of the first laser die cutting assembly 21 is aligned with the feeding roller assembly 23, and the output end of the second laser die cutting assembly 22 is aligned with the discharging roller assembly 24; the roll forming mechanism 30 includes two oppositely disposed press rolls 31.
The arrangement of the roll forming mechanism 30 after the cutting mechanism 20 can effectively avoid the release of tension when die cutting is performed after rolling, thereby effectively ensuring that the density of the coated tape is sufficiently high. The laser die cutting assembly is arranged to carry out two times of lug die cutting on the two adjacent coating strips, waste materials between the two lug die cutting marks can automatically fall off, and all cutting actions can be effectively omitted. The two groups of laser die-cutting assemblies are arranged, so that the distance between the die-cutting marks of the lugs between two adjacent coating strips is small, the materials are effectively saved, the cutting surface is also effectively ensured to be perpendicular to the surface of the battery pole piece, and the performance of the battery can be effectively ensured. If all the die cutting actions are concentrated in a group of laser die cutting assemblies, in order to ensure that the cutting surface is vertical to the surface of the battery pole piece, the output ends of two similar laser die cutting knives need to be vertical to the surface of the battery pole piece, and the two laser die cutting knives have non-negligible volumes, even if the two laser die cutting knives are arranged side by side, the knife edges of the two laser die cutting knives still have larger distance, so that the distance between the die cutting marks of the pole lugs between two adjacent coating strips is larger, and materials can be wasted; if the oblique laser mode cutter reduces the distance between the lug die cutting marks between two adjacent coating strips, the cutting surface is not perpendicular to the surface of the battery pole piece, so that the performance of the battery is reduced.
The battery pole piece obtained by cutting and shaping the device is shown in figure 2, a 18650 lithium battery is manufactured by using the battery pole piece, and various performances of the 18650 lithium battery are tested, wherein the test data are shown in the following table 1:
table 1, battery performance test table
From the above table, it is clear that the battery manufactured by using the device of the present invention has a density of 3.5 to 4.0g/cc, an internal resistance of 50mΩ or less, a self-discharge rate of 2% or less, and a capacity retention rate of 1C 300 times of 90% or more, and the battery has a stable structure, a long service life, good charge/discharge performance, and a high capacity retention rate.
The roll forming mechanism 30 is arranged behind the cutting mechanism 20, so that excessive tension release of the rolled coating tape can be avoided, the density of the coating tape on the obtained battery pole piece can be effectively improved, and the quality of the battery can be effectively improved; the invention omits all cutting actions and integrates cutting and rolling forming, can effectively improve the production efficiency, reduce the input cost of equipment and has small occupied land for the whole processing equipment; in addition, the precision of laser processing is higher, the cutting is faster, and the distance that the cutting tool trace was separated to the two sets of laser cross cutting subassembly can effectively shorten to can effectively save the material.
In this embodiment, the first laser die-cutting assembly 21 includes p first laser die-cutting blades aligned perpendicular to the advancing direction of the battery pole piece, the second laser die-cutting assembly 22 includes q second laser die-cutting blades aligned perpendicular to the advancing direction of the battery pole piece, and p+q=2n, where n is an integer greater than 1. The battery pole piece material belts comprise n groups of coating belts, when p=n and q=n, p first laser mold cutters firstly perform pole lug die cutting molding on one side of each coating belt, q second laser mold cutters perform pole lug die cutting molding on the other side of each coating belt, and waste automatically falls off; when p=n-1 and q=n+1, the p first laser cutters firstly carry out one-time lug die-cutting molding on the position between two adjacent coating belts in the battery pole piece, the q second laser cutters carry out one-time lug die-cutting molding on the position between two adjacent coating belts in the battery pole piece, and carry out lug die-cutting on the head edge and the tail edge of the battery pole piece, and waste materials automatically fall off.
In this embodiment, the feeding roller assembly 23 includes a first guide roller 231, a first limit roller 232 and a second guide roller 233 which are sequentially disposed along the advancing direction of the battery pole piece, preferably, two first limit rollers 232 are disposed along the advancing direction of the battery, and the output end of the first laser die-cutting assembly 21 is opposite to the space between the two first limit rollers 232.
In this embodiment, the discharging roller assembly 24 includes a third guiding roller 241, a second limiting roller 242 and a fourth guiding roller 243 sequentially disposed along the advancing direction of the battery pole piece, preferably, two second limiting rollers 242 are disposed along the advancing direction of the battery, and the output end of the third laser die-cutting assembly is opposite to the space between the two second limiting rollers 242.
Based on the above embodiment, the discharging roller assembly 24 further includes a pressing adjusting roller 244, the pressing adjusting roller 244 is located between the second limiting roller 242 and the fourth guiding roller 243, the axle center of the pressing adjusting roller 244 is located at one side below the second limiting roller 242, the diameter of the pressing adjusting roller 244 is larger than that of the second limiting roller 242, a waste channel 25 is disposed below the second limiting roller 242 and the pressing adjusting roller 244, the pressing adjusting roller 244 makes a pushing guiding angle, so that the waste can be effectively pushed to perform the waste channel 25, and the battery pole piece moves along the fourth guiding roller under the clamping of the receiving mechanism 40, so that the main body separation of the waste and the battery pole piece can be effectively realized.
In this embodiment, the cutting mechanism 20 further includes two mechanical cutters 26, the two mechanical cutters 26 are located at one sides of the feeding roller assembly 23 and the discharging roller assembly 24, when the battery pole piece is broken, the front and back connection is needed through the adhesive tape, the battery pole piece connected with the adhesive tape cannot be cut by using the laser die-cutting assembly, and the mechanical cutters 26 can effectively cut the battery pole piece, so that the cutting mechanism can effectively adapt to cutting under special conditions.
In this embodiment, a feeding deviation rectifying mechanism 50 is further disposed between the discharging mechanism 10 and the cutting mechanism 20, and the feeding deviation rectifying mechanism 50 can effectively ensure that the battery pole piece cannot deviate in the advancing process, so that the cutting precision can be effectively improved.
Based on the above embodiment, the feeding deviation rectifying mechanism 50 includes a deviation rectifying roller 51, two ends of the deviation rectifying roller 51 are respectively fixed with a limit baffle 52, and the position of the battery pole piece can be effectively adjusted through the two limit baffles 52, and the feeding deviation rectifying mechanism 50 can also be a material belt deviation rectifying mechanism with other structures.
In this embodiment, a length measuring mechanism 60 is further disposed between the roll forming mechanism 30 and the material receiving mechanism 40, and the length measuring mechanism 60 can measure the processed length of the battery pole piece.
Based on the above embodiment, the length measuring mechanism 60 includes the collimating roller 61 and the length measuring roller 62 that set gradually along the advancing direction of the battery pole piece, the vertex of the collimating roller 61 and the vertex of the fourth guiding roller 243 are located on the axisymmetric plane between the two pressing rollers 31, so as to further improve the stability of the rolling action, the collimating roller 61 and the length measuring roller 62 are located on different horizontal planes, the axis center of the length measuring roller 62 is connected with the rotary encoder 63, the angular displacement of the length measuring roller 62 can be calculated through the rotary encoder 63, and finally the length of the battery pole piece passing through the length measuring roller 62 can be calculated by matching with the radius of the length measuring roller 62.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (3)
1. The cutting device for the battery pole piece with the multi-coating belt is characterized by comprising a discharging mechanism (10), a cutting mechanism (20), a roll forming mechanism (30) and a receiving mechanism (40) which are sequentially arranged; the cutting mechanism (20) comprises a first laser die-cutting assembly (21), a second laser die-cutting assembly (22), a feeding roller assembly (23) and a discharging roller assembly (24), wherein the first laser die-cutting assembly (21) is positioned on one side, close to the discharging mechanism (10), of the second laser die-cutting assembly (22), the output end of the first laser die-cutting assembly (21) is opposite to the feeding roller assembly (23), and the output end of the second laser die-cutting assembly (22) is opposite to the discharging roller assembly (24); the roll forming mechanism (30) comprises two oppositely arranged press rolls (31);
the first laser die-cutting assembly (21) comprises p first laser die-cutting blades, the second laser die-cutting assembly (22) comprises q second laser die-cutting blades, and p+q=2n, wherein n is an integer greater than 1;
The discharging roller assembly (24) comprises a third guide roller (241), a second limit roller (242) and a fourth guide roller (243) which are sequentially arranged;
The discharging roller assembly (24) further comprises a pressing adjusting roller (244), the pressing adjusting roller (244) is positioned between the second limiting roller (242) and the fourth guide roller (243), and a waste channel (25) is arranged below the second limiting roller (242) and the pressing adjusting roller (244);
a feeding deviation correcting mechanism (50) is further arranged between the discharging mechanism (10) and the cutting mechanism (20);
the feeding deviation correcting mechanism (50) comprises a deviation correcting roller (51), and two ends of the deviation correcting roller (51) are respectively fixed with a limit baffle (52);
a length measuring mechanism (60) is further arranged between the roll forming mechanism (30) and the material receiving mechanism (40);
The length measuring mechanism (60) comprises a collimation roller (61) and a length measuring roller (62) which are sequentially arranged, the collimation roller (61) and the length measuring roller (62) are located on different horizontal planes, and the axis of the length measuring roller (62) is connected with a rotary encoder (63).
2. The multi-coated battery pole piece cutting device according to claim 1, wherein the feeding roller assembly (23) comprises a first guide roller (231), a first limit roller (232) and a second guide roller (233) which are sequentially arranged.
3. A multi-coated battery pole piece cutting-out device according to claim 1, wherein the cutting mechanism (20) further comprises two mechanical cutters (26), two of the mechanical cutters (26) being located on one side of the feed roller assembly (23) and the discharge roller assembly (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910259349.XA CN109848583B (en) | 2019-04-02 | 2019-04-02 | Battery pole piece cutting-out type device with multiple coating layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910259349.XA CN109848583B (en) | 2019-04-02 | 2019-04-02 | Battery pole piece cutting-out type device with multiple coating layers |
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| Publication Number | Publication Date |
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| CN109848583A CN109848583A (en) | 2019-06-07 |
| CN109848583B true CN109848583B (en) | 2024-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910259349.XA Active CN109848583B (en) | 2019-04-02 | 2019-04-02 | Battery pole piece cutting-out type device with multiple coating layers |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112059611A (en) * | 2019-06-11 | 2020-12-11 | 广东海中新能源设备股份有限公司 | Method and device for rolling and laser integrated sheet making |
| CN110660971B (en) * | 2019-08-30 | 2021-08-24 | 蜂巢能源科技有限公司 | Roller die-cutting machine |
| CN110814539A (en) * | 2019-12-03 | 2020-02-21 | 广东海中新能源设备股份有限公司 | Method and device for manufacturing battery pole piece by laser embedded cutting |
| CN110814751A (en) * | 2019-12-06 | 2020-02-21 | 广东海中新能源设备股份有限公司 | A kind of laser cutting method and battery pole piece laser cutting and rolling integrated machine |
| CN110900001A (en) * | 2019-12-09 | 2020-03-24 | 广东亿鑫丰智能装备股份有限公司 | High-efficiency laser pole piece cutting method |
| CN111554865B (en) * | 2020-05-15 | 2022-04-12 | 广东佐林新能源科技有限公司 | A kind of disc type aluminum-to-nickel electrode lug encapsulation method |
| CN111660015A (en) * | 2020-06-18 | 2020-09-15 | 昆山聚创新能源科技有限公司 | Laser die cutting method for pole piece |
| CN115555852B (en) * | 2021-06-30 | 2023-06-30 | 宁德时代新能源科技股份有限公司 | Electrode forming method and equipment |
| CN113636397B (en) * | 2021-08-31 | 2022-06-28 | 易鸿智能装备(宜兴)有限公司 | Pole piece splitting machine |
| CN116000465A (en) * | 2022-11-03 | 2023-04-25 | 三一技术装备有限公司 | Tab cutting device and tab cutting method |
| CN117506172B (en) * | 2024-01-05 | 2024-04-23 | 江苏先进光源技术研究院有限公司 | High-quality lithium battery pole piece laser cutting device and method |
| CN119650572B (en) * | 2024-12-20 | 2025-12-09 | 湖北亿纬动力有限公司 | Die cutting method for pole piece, pole piece and battery |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: Building 1, No. 338 Dong'an Road, Dongkeng Town, Dongguan City, Guangdong Province, 523000 Applicant after: Guangdong CIMC Haizhong New Energy Equipment Co.,Ltd. Address before: 523007 No. 9 Sanxing Road, Niushan Waijing Industrial Park, Dongcheng District, Dongguan City, Guangdong Province Applicant before: GUANGDONG HAIZHONG NEW ENERGY EQUIPMENT Co.,Ltd. Country or region before: China |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |