CN102760862A - Preparation process of lithium battery positive pole piece - Google Patents

Preparation process of lithium battery positive pole piece Download PDF

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Publication number
CN102760862A
CN102760862A CN2012102348867A CN201210234886A CN102760862A CN 102760862 A CN102760862 A CN 102760862A CN 2012102348867 A CN2012102348867 A CN 2012102348867A CN 201210234886 A CN201210234886 A CN 201210234886A CN 102760862 A CN102760862 A CN 102760862A
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CN
China
Prior art keywords
battery diaphragm
pole piece
rolling wheel
battery
roll
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
Application number
CN2012102348867A
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Chinese (zh)
Inventor
吴钢
钟华
刘昇钢
徐滔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUBEI ZHONGNENG LITHIUM TECHNOLOGY CO LTD
Original Assignee
HUBEI ZHONGNENG LITHIUM TECHNOLOGY CO LTD
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by HUBEI ZHONGNENG LITHIUM TECHNOLOGY CO LTD filed Critical HUBEI ZHONGNENG LITHIUM TECHNOLOGY CO LTD
Priority to CN2012102348867A priority Critical patent/CN102760862A/en
Publication of CN102760862A publication Critical patent/CN102760862A/en
Pending legal-status Critical Current

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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
    • 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

Abstract

The invention relates to a preparation process of a lithium battery positive pole piece. The preparation process is characterized by comprising the following steps of: respectively placing an upper battery diaphragm roll and a lower battery diaphragm roll at the upper and lower positions of a pole roll; carrying out rolling leveling on the upper battery diaphragm roll through a first group rolling wheel, and carrying out spraying through a cohesive material so as to obtain an upper battery diaphragm; carrying out rolling leveling on the lower battery diaphragm roll through a third group rolling wheel, and carrying out spraying through the cohesive material so as to obtain a lower battery diaphragm; carrying out rolling leveling on the pole roll through a second group rolling wheel, inputting the upper battery diaphragm, a leveling pole piece A and the lower battery diaphragm obtained in the step two in a fourth group rolling wheel to carry out rolling bonding together so as to obtain a film pasting pole piece B, wherein the pole piece A is positioned between the upper battery diaphragm and the lower battery diaphragm; and finally, drying the pole piece B obtained in the step three through a drying oven, and winding so as to obtain a filmed lithium battery positive pole piece subjected to winding. The preparation process provided by the invention has the advantages that the surface activity substance coating of the pole piece is protected from stripping, the pole piece is prevented from absorbing moisture in the air in a preparation process, and the yield of batteries is improved.

Description

The manufacture technology of lithium battery anode sheet
Technical field
The present invention relates to a kind of manufacture technology of lithium battery anode sheet, relate to all kinds of battery materials and comprise LiMn2O4, cobalt acid lithium, ternary material, LiFePO4 and the manufacturing of nickel cobalt lithium aluminate pole piece.
Background technology
At present, lithium ion battery manufacturing pole piece is made flow process and all is: through coating on aluminium foil, roll extrusion, oven dry, form the big volume of pole piece.Pole piece involves in row greatly and cuts, and is cut into according to the required pole piece of battery different size.And among whole each operation process of pole piece circulation, the active matter of pole piece is all directly exposed outside.The disadvantage that this technological process brings is: the pole piece collision causes the pole piece active matter to come off; Exposed active matter absorbs airborne moisture, influences the fail safe of battery.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and provide a kind of and help to protect pole piece surface-active substance coating not peel off, prevent that pole piece from absorbing airborne moisture in manufacture process, improve the manufacture technology of the lithium battery anode sheet of battery rate of finished products.
In order to achieve the above object, the present invention is achieved in that it is a kind of manufacture technology of lithium battery anode sheet, is characterized in that comprising the steps:
Step 1, will go up the battery membrane coil and down the battery diaphragm volume be placed on the upper-lower position of utmost point volume respectively;
Step 2, with the said battery membrane coil that goes up through first group of rolling wheel set roll-in is smooth after, carry out binding agent again and spray, obtain battery diaphragm; Said battery diaphragm is down rolled up after the 3rd group of rolling wheel set roll-in is smooth,
Carry out the binding agent spraying again, obtain down battery diaphragm; Said coiled sheet after second group of rolling wheel set roll-in is smooth, is sprayed slurry again on the aluminium foil plate, obtain smooth pole piece A;
Step 3, with step 2 resulting go up battery diaphragm, pole piece A and down battery diaphragm be input to the 4th group of rolling wheel set together to carry out roll-in bonding, obtain pad pasting pole piece B, pole piece A is between last battery diaphragm and following battery diaphragm;
Step 4, with the resulting pad pasting pole piece of step 3 B after oven for drying, reel, obtain the pad pasting lithium battery anode sheet of winding.
Said upward battery membrane coil is polypropylene (PP) or polyethylene (PE), and the said volume of battery diaphragm down is polypropylene (PP) or polyethylene (PE).
The speed of service of said upward battery membrane coil, following battery diaphragm volume and coiled sheet is identical.
Said binding agent is aqueous binders or oiliness binding agent, and surface spraying density reaches surface density 1 ± 20%g/dm 2
The bake out temperature of said baking oven is set in 40 ℃～50 ℃, and stoving time is 30s～40s.
The present invention's advantage compared with prior art is: help to protect pole piece surface-active substance coating not peel off, prevent that pole piece from absorbing airborne moisture in manufacture process, improved the rate of finished products of battery.
Description of drawings
Fig. 1 is a pole piece film process process chart of the present invention.
Embodiment
To combine accompanying drawing and embodiment that the present invention is done further detailed description below:
Embodiment one
As shown in Figure 1, a kind of manufacture technology of lithium battery anode sheet, the characteristics of present embodiment are to comprise the steps:
Step 1, will go up battery membrane coil 1 and down battery diaphragm volume 3 be placed on the upper-lower position of utmost point volume 2 respectively; Said upward battery membrane coil 1 reaches down, and battery diaphragm volume 2 is polypropylene (PP);
Step 2, with the said battery membrane coil 1 that goes up through first group of rolling wheel set 4 roll-in is smooth after, carry out binding agent again and spray, obtain battery diaphragm; The said volume 3 of battery diaphragm down after the 3rd group of rolling wheel set 6 roll-ins are smooth, is carried out the binding agent spraying again, obtain down battery diaphragm; With said coiled sheet 2 pole piece A after second group of rolling wheel set 5 roll-in is smooth; The speed of service of said upward battery membrane coil 1, following battery diaphragm volume 3 and coiled sheet 2 is identical, and their speed of service is 8.5 meters/minute; Said binding agent is an aqueous binders, and surface spraying density reaches surface density 1 ± 20%g/dm 2
Step 3, with step 2 resulting go up battery diaphragm, aluminium foil A and down battery diaphragm be input to the 4th group of rolling wheel set 7 together to carry out roll-in bonding, obtain pad pasting pole piece B, pole piece A is between last battery diaphragm and following battery diaphragm;
Step 4, with the resulting pad pasting pole piece of step 3 B after baking oven 8 oven dry, reel, obtain the pad pasting lithium battery anode sheet 9 of winding.The bake out temperature of said baking oven is set in 40 ℃～50 ℃, and stoving time is 30s～40s.
In the present embodiment, first group of rolling wheel set 4 comprises on first on rolling wheel set 41 and the first time rolling wheel set 42, the first rolling wheel set 41 and the first time rolling wheel set 42 roll-in battery diaphragm volume 1 of working in coordination; Second group of rolling wheel set 5 comprises on second on rolling wheel set 51 and the second time rolling wheel set 52, the second rolling wheel set 51 and the second time rolling wheel set 52 roll-in coiled sheet 2 of working in coordination; The 3rd group of rolling wheel set 6 comprises on the 3rd on rolling wheel set 61 and the 3rd time rolling wheel set 62, the three rolling wheel set 61 and the 3rd time rolling wheel set 62 roll-in battery diaphragm volume 3 of working in coordination; The 4th group of rolling wheel set 7 comprises on the 4th that rolling wheel set 71 and the 4th time rolling wheel set 2 are worked in coordination on rolling wheel set 71 and the 4th time rolling wheel set 72, the four battery diaphragm volume 1, coiled sheet 2 and battery diaphragm rolled up 3 roll-ins together.
Embodiment two
As shown in Figure 1, a kind of manufacture technology of lithium battery anode sheet, the characteristics of present embodiment are to comprise the steps:
Step 1, will go up battery membrane coil 1 and down battery diaphragm volume 3 be placed on the upper-lower position of utmost point volume 2 respectively; Said upward battery membrane coil 1 reaches down, and battery diaphragm volume 2 is polyethylene (PE);
Step 2, with the said battery membrane coil 1 that goes up through first group of rolling wheel set 4 roll-in is smooth after, carry out binding agent again and spray, obtain battery diaphragm; The said volume 3 of battery diaphragm down after the 3rd group of rolling wheel set 6 roll-ins are smooth, is carried out the binding agent spraying again, obtain down battery diaphragm; With the pole piece A of said coiled sheet 2 after second group of rolling wheel set 5 roll-in is smooth; The speed of service of said upward battery membrane coil 1, following battery diaphragm volume 3 and utmost point volume 2 is identical, and their speed of service is 8.5 meters/minute; Said binding agent is the oiliness binding agent, and surface spraying density reaches surface density 1 ± 20%g/dm 2
Step 3, with step 2 resulting go up battery diaphragm, pole piece A and down battery diaphragm be input to the 4th group of rolling wheel set 7 together to carry out roll-in bonding, obtain pad pasting pole piece B, pole piece A is between last battery diaphragm and following battery diaphragm;
Step 4, with the resulting pad pasting pole piece of step 3 B after baking oven 8 oven dry, reel, obtain the pad pasting lithium battery anode sheet 9 of winding.The bake out temperature of said baking oven is set in 40 ℃～50 ℃, and stoving time is 30s～40s.
In the present embodiment, first group of rolling wheel set 4 comprises on first on rolling wheel set 41 and the first time rolling wheel set 42, the first rolling wheel set 41 and the first time rolling wheel set 42 roll-in battery diaphragm volume 1 of working in coordination; Second group of rolling wheel set 5 comprises on second on rolling wheel set 51 and the second time rolling wheel set 52, the second rolling wheel set 51 and the second time rolling wheel set 52 roll-in coiled sheet 2 of working in coordination; The 3rd group of rolling wheel set 6 comprises on the 3rd on rolling wheel set 61 and the 3rd time rolling wheel set 62, the three rolling wheel set 61 and the 3rd time rolling wheel set 62 roll-in battery diaphragm volume 3 of working in coordination; The 4th group of rolling wheel set 7 comprises on the 4th that rolling wheel set 71 and the 4th time rolling wheel set 2 are worked in coordination on rolling wheel set 71 and the 4th time rolling wheel set 72, the four battery diaphragm volume 1, coiled sheet 2 and battery diaphragm rolled up 3 roll-ins together.

Claims (5)

1. the manufacture technology of a lithium battery anode sheet is characterized in that comprising the steps:
Step 1, will go up battery membrane coil (1) and down battery diaphragm volume (3) be placed on the upper-lower position of utmost point volume (2) respectively;
Step 2, with the said battery membrane coil (1) that goes up through first group of rolling wheel set (4) roll-in is smooth after, carry out binding agent again and spray, obtain battery diaphragm; Said battery diaphragm volume (3) down after the 3rd group of rolling wheel set (6) roll-in is smooth, is carried out the binding agent spraying again, obtain down battery diaphragm; Said utmost point volume (2) is smooth through second group of rolling wheel set (5) roll-in;
Step 3, with step 2 resulting go up battery diaphragm, smooth pole piece A and down battery diaphragm be input to the 4th group of rolling wheel set (7) together to carry out roll-in bonding, obtain pad pasting pole piece B, pole piece A is between last battery diaphragm and following battery diaphragm;
Step 4, with the resulting pole piece B of step 3 after baking oven (8) oven dry, reel, obtain the pad pasting lithium battery anode sheet (9) of winding.
2. the manufacture technology of lithium battery anode sheet according to claim 1 is characterized in that the said battery membrane coil (1) that goes up is polypropylene (PP) or polyethylene (PE), and said battery diaphragm volume (2) down is polypropylene (PP) or polyethylene (PE).
3. the manufacture technology of lithium battery anode sheet according to claim 1 is characterized in that the speed of service of said upward battery membrane coil (1), following battery diaphragm volume (3) and utmost point volume (2) is identical.
4. the manufacture technology of lithium battery anode sheet according to claim 1 is characterized in that said binding agent is aqueous binders or oiliness binding agent, and surface spraying density reaches surface density 1 ± 20%g/dm 2
5. the manufacture technology of lithium battery anode sheet according to claim 1 is characterized in that the bake out temperature of said baking oven (8) is set in 40 ℃～50 ℃, and stoving time is 30s～40s.
CN2012102348867A 2012-07-09 2012-07-09 Preparation process of lithium battery positive pole piece Pending CN102760862A (en)

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Application Number Priority Date Filing Date Title
CN2012102348867A CN102760862A (en) 2012-07-09 2012-07-09 Preparation process of lithium battery positive pole piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012102348867A CN102760862A (en) 2012-07-09 2012-07-09 Preparation process of lithium battery positive pole piece

Publications (1)

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CN102760862A true CN102760862A (en) 2012-10-31

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201417793Y (en) * 2009-05-12 2010-03-03 张继宏 Lithium battery pole shoe coating machine
CN102055004A (en) * 2009-11-03 2011-05-11 三星Sdi株式会社 Rechargeable battery and method of manufacturing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201417793Y (en) * 2009-05-12 2010-03-03 张继宏 Lithium battery pole shoe coating machine
CN102055004A (en) * 2009-11-03 2011-05-11 三星Sdi株式会社 Rechargeable battery and method of manufacturing the same

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Application publication date: 20121031