CN114050320A - Pole piece thermal compounding system and method - Google Patents
Pole piece thermal compounding system and method Download PDFInfo
- Publication number
- CN114050320A CN114050320A CN202111335383.4A CN202111335383A CN114050320A CN 114050320 A CN114050320 A CN 114050320A CN 202111335383 A CN202111335383 A CN 202111335383A CN 114050320 A CN114050320 A CN 114050320A
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- Prior art keywords
- pole piece
- diaphragm
- pole
- supply assembly
- belt
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 238000013329 compounding Methods 0.000 title abstract description 46
- 238000007731 hot pressing Methods 0.000 claims abstract description 33
- 230000006798 recombination Effects 0.000 claims abstract description 22
- 238000005215 recombination Methods 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 230000000712 assembly Effects 0.000 claims description 16
- 238000000429 assembly Methods 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims 2
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 9
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 9
- 239000012528 membrane Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 238000010981 drying operation Methods 0.000 abstract description 3
- -1 polyethylene terephthalate Polymers 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002508 compound effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0468—Compression means for stacks of electrodes and separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a pole piece thermal compounding system which comprises a first pole piece supply assembly, a diaphragm supply assembly, a second pole piece supply assembly, a second hot pressing roller and a diaphragm cutter, wherein the first pole piece supply assembly, the diaphragm supply assembly, the second pole piece supply assembly, the second hot pressing roller and the diaphragm cutter are sequentially arranged along a thermal compounding path; the upper surface and the lower surface of the thermal compounding path are respectively provided with the diaphragm supply assembly; the first pole piece supply assembly and the second pole piece supply assembly respectively supply a first pole piece and a second pole piece which have opposite polarities and are dried to the heat recombination path; and after the first pole piece is coated and thermally compounded by the two diaphragm belts, the second pole piece is thermally compounded with the diaphragm belt on one side, and the pole piece is processed by cutting at a fixed length by a diaphragm cutter. The invention has the advantages that; the first pole piece and the second pole piece are respectively dried before entering the thermal compounding path, drying operation is not needed after thermal compounding, a PET (polyethylene terephthalate) membrane is not needed, and material cost is remarkably reduced.
Description
Technical Field
The invention relates to the technical field of lithium battery production, in particular to a pole piece thermal compounding system and a pole piece thermal compounding method.
Background
The laminated battery core of the present lithium battery mostly adopts a thermal compounding process, the invention patent application with the publication number of CN112635809A discloses a battery pole piece laminating device and a battery core laminating method, and discloses a method for passing a four-layer unit belt formed by a positive pole piece/diaphragm belt/a negative pole piece/diaphragm belt through an oven for heating and carrying out thermal compounding, and finally cutting the diaphragm belt to obtain the four-layer unit. In order to protect the surfaces of the pole piece and the diaphragm from being damaged, the PET membrane is used for clamping the four layers of unit belts to enter the oven together, and finally the PET membrane is wound for recycling. However, the PET film can be reused for 5 times at most, and after 5 times, the PET film cannot be reused and can only be frequently replaced due to surface pollution and scratch, so that the production cost is high.
Disclosure of Invention
The invention aims to provide a pole piece thermal compounding system and a pole piece thermal compounding method without a PET (polyethylene terephthalate) membrane.
The invention solves the technical problems through the following technical scheme: a pole piece thermal compounding system comprises a first pole piece supply assembly, a diaphragm supply assembly, a second pole piece supply assembly, a second hot pressing roller and a diaphragm cutter which are sequentially arranged along a thermal compounding path; the upper surface and the lower surface of the thermal compounding path are respectively provided with the diaphragm supply assembly; the first pole piece supply assembly and the second pole piece supply assembly respectively supply a first pole piece and a second pole piece which have opposite polarities and are dried to the heat recombination path;
the diaphragm feeding assembly comprises a diaphragm belt and first hot pressing rollers, the upper first hot pressing rollers and the lower first hot pressing rollers are in contact with each other, the first pole piece passes through the space between the two first hot pressing rollers along with the two diaphragm belts, the second pole piece passes through the second hot pressing rollers along with the diaphragm belt on one side, the second pole piece is overlapped with the first pole piece in position on the diaphragm belt, and the diaphragm cutter cuts off the diaphragm belt from the middle of the adjacent second pole piece.
According to the invention, the first pole piece and the second pole piece are respectively dried before entering the thermal compounding path, drying operation is not required after thermal compounding, a PET membrane is not required, the material cost is obviously reduced, the first pole piece is subjected to hot-pressing compounding with the diaphragm belt through the first hot-pressing roller, the second pole piece is subjected to hot-pressing compounding with the diaphragm belt through the second hot-pressing roller, the compounding effect is ensured, and then the diaphragm is cut off through the diaphragm cutter, so that the four-layer unit formed by sequentially stacking the second pole piece, the diaphragm, the first pole piece and the diaphragm is obtained.
Preferably, the diaphragm feed assembly comprises a diaphragm spool on which a wound diaphragm tape is placed.
Preferably, first pole piece supply module and second pole piece supply module include respectively one and unreel the axle, unreel the pole area of putting the roll-up on the axle respectively, the pole area passes oven, transfer roller and drive roller in proper order, be provided with the pole area cutter of cutting the pole area between transfer roller and the drive roller, the drive roller sets up on hot compound route.
Preferably, the upper side and the lower side of the thermal recombination path are respectively provided with a first pole piece supply assembly and a second pole piece supply assembly, and the two first pole piece supply assemblies and the two second pole piece supply assemblies respectively supply the first pole piece and the second pole piece to the thermal recombination path in a staggered manner.
Preferably, the drive rollers of the two first pole piece feeding assemblies are in contact with each other, and the drive rollers of the two second pole piece feeding assemblies are in contact with each other.
Preferably, the drive roller is capable of heating the first and/or second pole piece passing therethrough.
Preferably, the first pole piece is a negative pole piece, and the second pole piece is a positive pole piece.
The invention also provides a pole piece thermal compounding method using the pole piece thermal compounding system, wherein two surfaces of the dried first pole piece are coated by two diaphragm belts and are fixed in a thermal compounding way, the first pole piece moves along with the diaphragm belts to pass through the second pole piece, the dried second pole piece is fixed in a thermal compounding way with the outer side surface of one of the diaphragm belts, the second pole piece is overlapped with the first pole piece, and the diaphragm cutter cuts off the diaphragm belts from the adjacent second pole pieces to obtain a four-layer unit after thermal compounding.
Preferably, the first pole piece supply assembly and the second pole piece supply assembly respectively comprise a unreeling shaft, a reeled pole belt is respectively placed on the unreeling shaft, the pole belt sequentially passes through the oven, the conveying roller and the driving roller, a pole belt cutter for cutting the pole belt is arranged between the conveying roller and the driving roller, and the driving roller is arranged on the thermal compound path;
the polar belt passes through the oven and enters the conveying roller, enters the driving roller under the conveying of the conveying roller, and is cut off by the polar belt cutter between the conveying roller and the driving roller to form the first pole piece or the second pole piece.
Preferably, the upper side and the lower side of the thermal recombination path are respectively provided with a first pole piece supply assembly and a second pole piece supply assembly, and the two first pole piece supply assemblies and the two second pole piece supply assemblies respectively supply the first pole piece and the second pole piece to the thermal recombination path in a staggered manner.
The pole piece thermal compounding system and the pole piece thermal compounding method have the advantages that: drying is carried out before first pole piece and second pole piece enter into the thermal compound route respectively, need not carry out the stoving operation again after the thermal compound, need not use the PET diaphragm, showing and having reduced material cost, first pole piece is through first hot pressing roller and diaphragm area hot pressing complex, the second pole piece is through second hot pressing roller and diaphragm area hot pressing complex, ensure compound effect, then cut off the diaphragm through the diaphragm cutter, obtain by the second pole piece, the diaphragm, first pole piece, the four layers of unit that the diaphragm order stacked. Two sets of pole piece supply assemblies are respectively arranged on the upper side and the lower side of the thermal compounding path, so that the production efficiency is improved, the driving roller has a heating function, and the temperature is applied while rolling is carried out, so that the thermal compounding efficiency is further improved. The two diaphragms are used for coating the negative plate, so that dust is prevented from affecting the quality of the product, and the yield is improved.
Drawings
Fig. 1 is a schematic diagram of a pole piece thermal compound system according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described below in detail and completely with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a pole piece thermal compounding system, which includes a first pole piece feeding assembly 10, a diaphragm feeding assembly 30, a second pole piece feeding assembly 20, a second hot pressing roller 80 and a diaphragm cutter 60, which are sequentially arranged along a thermal compounding path (not shown); the upper and lower surfaces of the thermal compounding path are respectively provided with the diaphragm feeding assemblies 30; the first pole piece supply assembly 10 and the second pole piece supply assembly 20 respectively supply the first pole piece 102 and the second pole piece 202 which have opposite polarities and are dried to the heat recombination path; the diaphragm feeding assembly 30 comprises a diaphragm strip 301 and a first hot-pressing roller 302, wherein the upper first hot-pressing roller 302 and the lower first hot-pressing roller 302 are in contact with each other, the first pole piece 102 passes between the two first hot-pressing rollers 302 along with the two diaphragm strips 301, the second pole piece 202 passes through the second hot-pressing roller 80 along with one side diaphragm strip 301, the second pole piece 202 is overlapped with the first pole piece 102 on the position of the diaphragm strip 301, and the diaphragm cutter 60 cuts off the diaphragm strip 301 from the middle of the adjacent second pole piece 202.
In the embodiment, the first pole piece 102 and the second pole piece 202 are respectively dried before entering the thermal compounding path, drying operation is not required after thermal compounding, a PET membrane is not required, the material cost is remarkably reduced, the first pole piece 102 is thermally pressed and compounded with the diaphragm band 301 through the first hot pressing roller 302, the second pole piece 202 is thermally pressed and compounded with the diaphragm band 301 through the second hot pressing roller 80, the compounding effect is ensured, and then the diaphragm is cut off through the diaphragm cutter 60, so that the four-layer unit 70 formed by sequentially stacking the second pole piece 202, the diaphragm piece 303, the first pole piece 102 and the diaphragm piece 303 is obtained.
The diaphragm feed assembly 30 further comprises a diaphragm reel 304, on which the wound diaphragm band 301 is placed on the diaphragm reel 304.
The first pole piece feeding assembly 10 and the second pole piece feeding assembly 20 respectively comprise a unreeling shaft 40, a reeled pole belt 401 is respectively placed on the unreeling shaft 40, the pole belt 401 sequentially passes through an oven 402, a conveying roller 403 and a driving roller 404, a pole belt cutter 405 for cutting the pole belt 301 is arranged between the conveying roller 403 and the driving roller 404, and the driving roller 404 is arranged on a thermal compound path; the wound pole belt 401 is dried by an oven and then driven forward by a conveying roller 403 to enter the position of a driving roller 404, the pole belt is driven by the driving roller 404 to travel along a thermal compound path, a pole belt cutter 405 cuts the pole belt 401 with a preset length according to a preset time interval or the movement position of the front end of the pole belt to form a first pole piece 102 or a second pole piece 202, then the driving roller 404 continues to drive the first pole piece 102 or the second pole piece 202 to move forward, and the end of the cut pole belt 401 can be driven by the conveying roller 403 to enter the position of the driving roller 404 due to the fact that the pole belt 401 has certain rigidity and the distance between the conveying roller 403 and the driving roller 404 is short.
After pole piece cutting is completed, the first pole piece 102 is driven by the driving roller 404 to enter between the two first hot pressing rollers 302, as the pole belt 401 is dried and has a certain residual temperature, and then is acted by the first hot pressing rollers 302 to complete hot pressing compounding with the diaphragm belt 301, the first pole piece 102 is conveyed forwards along with the diaphragm belt 301, when passing through the position of the driving roller 404 of the second pole piece supply assembly 20, the second pole piece 202 is contacted with the diaphragm belt 301 and is heated and pressed by the second hot pressing rollers 80 along with the diaphragm belt 301 under the driving of the driving roller 404 to complete hot compounding, and then the diaphragm belt 301 which is completed with hot compounding is cut according to a preset length.
In operation, a pressure roller or support surface may be provided on the thermal compounding path in cooperation with the drive roller 404, as desired.
Further, in this embodiment, a set of first pole piece feeding assembly 10 and a set of second pole piece feeding assembly 20 are respectively disposed on the upper side and the lower side of the thermal compound path, and the two first pole piece feeding assemblies 10 and the two second pole piece feeding assemblies 20 respectively supply the first pole piece 102 and the second pole piece 202 to the thermal compound path in an interlaced manner, so that the cut first pole piece 102 and the cut second pole piece 202 are alternately conveyed by using the working beat gap of the pole belt cutter 405; thereby improving the work efficiency and thermally compounding the second pole piece 202 in sequence on the outer sides of the two membrane strips to keep the structure of the four-layer unit 70 after cutting consistent.
The driving rollers 404 of the two first pole piece feeding assemblies 10 are in contact with each other, and the driving rollers 404 of the two second pole piece feeding assemblies 20 are in contact with each other, but it is also possible to stagger the positions of the first pole piece feeding assemblies 10 and the second pole piece feeding assemblies 20 on both sides, and provide a pressing roller or a supporting platform for each driving roller 404 to be matched with.
Preferably, the driving roller 404 can heat the first pole piece 102 and the second pole piece 202 passing through the driving roller 404, so that the first pole piece 102 is preheated, hot-press compounding is facilitated, the second pole piece 202 sequentially passes through the driving roller 404 and the second hot-press roller 80 to be subjected to hot compounding twice, and compounding quality is improved. The temperature is applied while the rolling is carried out, so that the heat compounding efficiency is further improved.
Under the condition of ensuring that the polarities are opposite, the polarities of the first pole piece 102 and the second pole piece 202 can be set arbitrarily according to needs, and the negative pole piece is easier to fall off, so that the first pole piece 102 is preferably set as the negative pole piece, the negative pole piece can be coated by the diaphragm strip 301, and dust is prevented from affecting the processing quality.
The implementation also provides a pole piece thermal compounding method, wherein two surfaces of a dried first pole piece are coated by two diaphragm belts and are thermally compounded and fixed, the first pole piece moves along with the diaphragm belts to pass through a second pole piece, a dried second pole piece is thermally compounded and fixed with the outer side surface of one of the diaphragm belts, the second pole piece is overlapped with the first pole piece, and the diaphragm belts are cut off between the adjacent second pole pieces to obtain a thermally compounded four-layer unit.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111335383.4A CN114050320A (en) | 2021-11-11 | 2021-11-11 | Pole piece thermal compounding system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111335383.4A CN114050320A (en) | 2021-11-11 | 2021-11-11 | Pole piece thermal compounding system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114050320A true CN114050320A (en) | 2022-02-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111335383.4A Pending CN114050320A (en) | 2021-11-11 | 2021-11-11 | Pole piece thermal compounding system and method |
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| Country | Link |
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| CN (1) | CN114050320A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000702A1 (en) * | 2021-07-23 | 2023-01-26 | 蜂巢能源科技股份有限公司 | Thermal composite lamination device and thermal composite lamination method |
| CN118507841A (en) * | 2023-03-06 | 2024-08-16 | 深圳欣界能源科技有限公司 | Composite method and device of battery pole piece and diaphragm, battery cell preparation method and battery |
| CN118738507A (en) * | 2024-09-03 | 2024-10-01 | 深圳市海得地实业有限公司 | A processing device for button batteries |
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| CN105811017A (en) * | 2016-05-07 | 2016-07-27 | 合肥国轩高科动力能源有限公司 | Continuous composite device of winding type laminated battery cell unit |
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| CN112909351A (en) * | 2021-03-31 | 2021-06-04 | 蜂巢能源科技有限公司 | Lamination process |
| CN113224368A (en) * | 2021-05-06 | 2021-08-06 | 上海兰钧新能源科技有限公司 | Film sticking machine and pole piece pressing method |
| CN113555595A (en) * | 2021-07-23 | 2021-10-26 | 蜂巢能源科技有限公司 | A kind of thermal composite lamination equipment and thermal composite lamination method |
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2021
- 2021-11-11 CN CN202111335383.4A patent/CN114050320A/en active Pending
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| US20100204003A1 (en) * | 2009-02-06 | 2010-08-12 | Primax Electronics Ltd. | Continuously variable speed-changing transmission mechanism of sheet laminating apparatus |
| CN105811017A (en) * | 2016-05-07 | 2016-07-27 | 合肥国轩高科动力能源有限公司 | Continuous composite device of winding type laminated battery cell unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023000702A1 (en) * | 2021-07-23 | 2023-01-26 | 蜂巢能源科技股份有限公司 | Thermal composite lamination device and thermal composite lamination method |
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| WO2024183235A1 (en) * | 2023-03-06 | 2024-09-12 | 深圳欣界能源科技有限公司 | Method and device for compositing battery electrode sheet and separator, battery cell preparation method, and battery |
| CN118738507A (en) * | 2024-09-03 | 2024-10-01 | 深圳市海得地实业有限公司 | A processing device for button batteries |
| CN118738507B (en) * | 2024-09-03 | 2024-11-19 | 深圳市海得地实业有限公司 | A processing device for button batteries |
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Application publication date: 20220215 |