CN109244554A - A kind of lithium ion battery zigzag laminating equipment and its technique - Google Patents
A kind of lithium ion battery zigzag laminating equipment and its technique Download PDFInfo
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- CN109244554A CN109244554A CN201811109301.2A CN201811109301A CN109244554A CN 109244554 A CN109244554 A CN 109244554A CN 201811109301 A CN201811109301 A CN 201811109301A CN 109244554 A CN109244554 A CN 109244554A
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- ion battery
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- 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
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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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- 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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- Secondary Cells (AREA)
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Abstract
The invention discloses a kind of lithium ion battery zigzag laminating equipment and its technique, lithium ion battery zigzag laminating equipment includes: diaphragm, and even away from several negative electrode tabs are equipped on diaphragm upper surface, diaphragm lower surface is equipped with several positive plates；Hot-pressing compounding device；Diaphragm cutting off apparatus；Stacking mechanism, lithium ion battery zigzag lamination process includes the following steps: that anode volume and cathode volume are first die cut or are cut by (1), then the negative electrode tab and positive plate after the upper and lower surfaces of diaphragm are bonded cross cutting respectively or cut, and positive plate is interspersed with negative electrode tab；(2) then that diaphragm and each negative electrode tab and positive plate progress hot pressing is compound；(3) it finally carries out zigzag and folds simultaneously severing diaphragm.The present invention makes to be die cut or cut to realize seamless interfacing with zigzag lamination, saves pole piece transfer device and facility, and using the fixed pole piece of hot pressing complex method, reduces naked battery core in transfer process, the risk of pole piece dislocation.
Description
Technical field
The present invention relates to battery technology fields, and in particular to a kind of lithium ion battery zigzag laminating equipment and its technique.
Background technique
Lithium ion battery is current most popular new energy energy storage device, and in cell assembling processes, the assembling of naked battery core
It is one of most important one process.There are three basic demands: the fully wrapped around anode of 1. cathode for naked battery core assembly；2. diaphragm is complete
Wrap up coating；3. electrode centers are aligned.Naked battery core package technique bundling around with two kinds of big technology paths of lamination, wherein winding also
Divide full tab winding and multipole ear winding, lamination splits pocket type slice and zigzag lamination.
Zigzag lamination techniques are a kind of most simple and easy lamination process.Firstly, positive/negative plate to be die cut or cut respectively
At monolithic, such as Fig. 1.
Then, diaphragm is moved using zigzag mode, and diaphragm folds every time, manipulator grab a piece of electrode slice be placed on every
On film, such as Fig. 2.
Above-mentioned lamination has following two:
(1) it is die cut or cuts process and lamination process separates, under automation equipment, pole piece transfer needs longer
Material flow line, purchase and maintenance cost are high；Or pole piece transfer, inefficiency are carried out using magazine；
(2) after naked battery core is made in lamination process, due between pole piece and diaphragm without any active force, pole piece before tab welding
Pole is easily dislocated, and there are security risks.
Summary of the invention
The present invention to solve the above-mentioned problems, to provide a kind of lithium ion battery zigzag laminating equipment and its technique.
In order to achieve the above objectives, technical scheme is as follows:
A kind of lithium ion battery zigzag laminating equipment, which is characterized in that the lithium ion battery zigzag laminating equipment packet
It includes:
Diaphragm, the diaphragm upper surface are equipped with several negative electrode tabs, and the diaphragm lower surface is equipped with several anodes
Piece, and positive plate is interspersed with negative electrode tab；
Hot-pressing compounding device, it is multiple that the hot-pressing compounding device can carry out hot pressing to diaphragm and each negative electrode tab and positive plate
It closes；
Stacking mechanism, each section of diaphragm after cutting that break, which can enter in stacking mechanism, carries out zigzag folding and severing diaphragm；
Diaphragm cutting off apparatus is cut off diaphragm by diaphragm cutting off apparatus after stacking mechanism lamination.
In a preferred embodiment of the invention, the diaphragm upper and lower surfaces are respectively equipped with adhesive layer, cathode
Piece and positive plate pass through adhesive layer respectively and are adhesively fixed on diaphragm.
In a preferred embodiment of the invention, the lithium ion battery zigzag laminating equipment further includes two release
Film winding device and two release film wrap-ups, two release film decoiling equipments are symmetricly set on diaphragm two sides up and down, release
Release film can be laid in the upper surface or lower surface of diaphragm by film winding device, and be connect respectively with each negative electrode tab or positive plate
Touching, two release film unwinding devices are symmetricly set on diaphragm two sides up and down, and are located at hot-pressing compounding device side, release film winding
Device can withdraw the release film being laid on the upper surface or lower surface of diaphragm.
In a preferred embodiment of the invention, the hot-pressing compounding device includes two with heating pressurization function
Metal roller, the two metal rollers are symmetricly set on the two sides up and down of diaphragm, and metal roller is located at release film winding dress
It sets between release film wrap-up.
A kind of lithium ion battery zigzag lamination process, the lithium ion battery zigzag lamination process include the following steps:
(1) first anode volume and cathode volume are die cut or are cut, then glued respectively in the upper and lower surfaces of diaphragm
Negative electrode tab and positive plate after connecing cross cutting or cutting, and positive plate is interspersed with negative electrode tab；
(2) then that diaphragm and each negative electrode tab and positive plate progress hot pressing is compound；
(3) it finally carries out zigzag and folds simultaneously severing diaphragm.
In a preferred embodiment of the invention,
After anode volume and cathode volume are die cut or cut, vision is carried out by manipulator or CCD is positioned, after being die cut or cutting
Negative electrode tab and positive plate be individually positioned in the upper and lower surfaces of diaphragm.
In a preferred embodiment of the invention,
Before diaphragm and each negative electrode tab and positive plate progress hot pressing are compound, it can divide equally not in the upper and lower surfaces of diaphragm
Tile one layer of release film, and release film is contacted with each negative electrode tab and positive plate respectively, and the upper of diaphragm will be laid in after hot pressing is compound
Release film on surface and lower surface is withdrawn.
In a preferred embodiment of the invention,
It before diaphragm and positive plate and negative electrode tab hot pressing are compound, first pass through a pair of of nip roll and is corrected, then pass through one again
It is compound to the metal roller progress hot pressing with heating pressurization function, and nip roll and the circle center distance of metal roller are less than pole
Piece width, the heating temperature of metal roller are 25 DEG C~120 DEG C, and pressure is 100kgf~500kgf.
In a preferred embodiment of the invention, the diaphragm after hot pressing is compound is caught first on diaphragm by manipulator
Negative electrode tab pulls in and carries out lamination in stacking mechanism, also, stacking mechanism and diaphragm all use fixed form to carry out lamination.
In a preferred embodiment of the invention, lamination and hot pressing it is compound between be reserved with cushion space.
The beneficial effects of the present invention are:
The present invention makes to be die cut or cut to realize seamless interfacing with zigzag lamination, saves pole piece transfer device and facility, and
Using the fixed pole piece of hot pressing complex method, naked battery core is reduced in transfer process, the risk of pole piece dislocation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of positive plate and negative electrode tab；
Fig. 2 is the process flow chart of existing zigzag lamination；
Fig. 3 is the working principle of the invention figure；
Fig. 4 is the side view of the diaphragm after hot pressing is compound；
Fig. 5 is the top view of the diaphragm after hot pressing is compound；
The lamination schematic diagram of Fig. 6 stacking mechanism.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 3 to Fig. 6, lithium ion battery zigzag laminating equipment provided by the invention comprising diaphragm 100, hot pressing are multiple
It attaches together and sets 200, diaphragm cutting off apparatus 300 and stacking mechanism 400.
Diaphragm 100 is and to guarantee negative electrode tab for being connected as one several negative electrode tabs and several positive plates
It is interspersed above it with positive plate.
Specifically adhesive layer can be respectively equipped in the upper and lower surfaces of diaphragm 100, anode volume 710 and cathode volume 720 into
Row cross cutting or negative electrode tab after cutting and positive plate are fixed on the upper and lower surfaces of diaphragm 100 by bonding way.
Adhesive layer concretely PVDF coating.
Manipulator can be equipped in 100 side of diaphragm, vision or CCD are carried out by manipulator and positioned, directly by negative electrode tab and
Positive plate is placed on the upper and lower surfaces of diaphragm 100.
Hot-pressing compounding device 200 is for each negative electrode tab of 100 upper and lower surfaces of diaphragm and each will to be arranged in
A positive plate and the progress hot pressing of diaphragm 100 are compound, so as to which negative electrode tab and positive plate to be adhered to each other with diaphragm 100, in this way
Not only naked battery core electrode slice dislocation risk in moving process can have been reduced, but also reduce gap between pole piece and diaphragm to reduce in battery core
Resistance.
Hot-pressing compounding device 200 specifically includes two metal rollers with heating pressurization function, the two metal rollers
It is symmetricly set on the two sides up and down of diaphragm 100.
In addition, a pair of of nip roll can be equipped in 200 side of hot-pressing compounding device, nip roll respectively with the upper table of diaphragm 100
Face and following table face contact, diaphragm 100 can enter nip roll, can prevent diaphragm in this way before entering hot-pressing compounding device 200
Negative electrode tab and the positive plate dislocation before hot pressing is compound on 100.
Negative electrode tab and positive plate are carrying out hot pressing compound tense in order to prevent, and negative electrode tab and positive plate are damaged, and the application is also
Including two release film decoiling equipments 500 and two release film wrap-ups 600.
Two release film decoiling equipments 500 are symmetricly set on about 100 two sides of diaphragm, and release 500 device of film winding can incite somebody to action
Release film is laid in the upper surface or lower surface of diaphragm 100, and contacts respectively with each negative electrode tab or positive plate, such diaphragm
100 that hot pressing can be carried out together with negative electrode tab positive plate is compound, and protects to negative electrode tab positive plate.
Two release film unwinding devices 600 are symmetricly set on about 100 two sides of diaphragm, and hot-pressing compounding device be located at from
Between type film unwinding device 600 and release film decoiling equipment 500, release film unwinding device 600 is compound for that will pass through hot pressing
Afterwards, it is laid in release film in the upper and lower surfaces of diaphragm 100 to withdraw, to not influence subsequent disconnected cut and lamination.
Stacking mechanism 400 is to be prepared into naked battery core, rubberizing ending for diaphragm 100 to be carried out zigzag folding.
Diaphragm cutting off apparatus 300 is arranged in 400 side of stacking mechanism, is for will be after 400 lamination of stacking mechanism
Battery core is cut, by cutting diaphragm 100.
Implementation based on above scheme, the application also provide a kind of lithium ion battery zigzag lamination process comprising as follows
Step:
(1) first anode volume 710 and cathode volume 720 are die cut or are cut, then the upper surface in diaphragm 100 and following table
Face is even away from the negative electrode tab being bonded after being die cut or cutting and positive plate respectively, and positive plate is interspersed with negative electrode tab；
(2) then that diaphragm 100 and each negative electrode tab and positive plate progress hot pressing is compound；
(3) it finally carries out zigzag and folds simultaneously severing diaphragm.
After anode volume and cathode volume are die cut or cut, vision is carried out by manipulator or CCD is positioned, after being die cut or cutting
Negative electrode tab and positive plate be individually positioned in the upper and lower surfaces of diaphragm, can be equidistant, can also be unequal spacing, in this way
It is greatly improved working efficiency.
It, can be in the upper and lower surfaces of diaphragm 100 before diaphragm 100 and each negative electrode tab and positive plate progress hot pressing are compound
Divide equally not Ping Pu one layer of release film, release film contacts with each negative electrode tab and positive plate respectively, will be laid in after hot pressing is compound every
Release film in the upper and lower surfaces of film 100 is withdrawn.
In addition, first passing through a pair of of nip roll before diaphragm and positive plate and negative electrode tab hot pressing are compound and being corrected, can be prevented in this way
The only negative electrode tab on diaphragm 100 and the positive plate dislocation before hot pressing is compound, then again by a pair with heating pressurization function
The progress hot pressing of metal roller is compound, and nip roll and the circle center distance of metal roller are less than pole piece width, and metal roller adds
Hot temperature is 25 DEG C~120 DEG C, and pressure is 100kgf~500kgf.
In this way, since the upper and lower surfaces of diaphragm 100 are respectively equipped with adhesive layer, such as PVDF, CMC or its mixing
The binder used on object or gel-like substance, the adhesive layer and positive plate and negative electrode tab is similar, and being heated, it is viscous to will increase it
Property, it, can be by negative electrode tab and positive plate pressing on diaphragm 100 by the way that the metal roller of pressurization can be heated, and fastness is very
It is high.
This technique is used uses hot pressing compound before lamination, so that having between negative electrode tab and positive plate and diaphragm 100 certain
Bonding force, in moving process, pole piece will not occur to be displaced by a small margin inside battery core battery core.The compound battery core of hot pressing, is inhaling
When receiving electrolyte, be first impregnated with by diaphragm, after wick into the microcellular structure of electrode layer.The compound battery core of non-hot pressing,
There are air layer between pole piece and diaphragm, electrolyte needs first to fill up air layer, just can enter electrode microcellular structure.Meanwhile the sky
The presence of gas-bearing formation increases the transmission range of lithium ion, which is proportional to battery core internal resistance.
Diaphragm 100 after hot pressing is compound specifically can directly be caught first negative electrode tab on diaphragm 100 by manipulator, be pulled in
Lamination is carried out in stacking mechanism 400.
This technique uses point lamination process all to carry out lamination using fixed form for stacking mechanism 400 and diaphragm 100, specifically
One cathode lamination pressure roller 410 can be set above stacking mechanism 400, be equipped with a positive lamination pressure roller in 100 side of diaphragm
110, the diaphragm 100 vertically put down can be carried out by zigzag by the cooperation of cathode lamination pressure roller 410 and positive lamination pressure roller 110
Pile up, complete cell lamination, so compared with the existing technology in: stacking mechanism 400 is fixed, by the way that diaphragm 100 is reciprocal
It is mobile to complete zigzag lamination or by the way that diaphragm 100 is fixed, folded by the way that stacking mechanism 400 is moved back and forth completion zigzag
Piece, lamination efficiency and lamination effect are all greatly improved.
In addition, being reserved with cushion space between the lamination step and hot pressing composite steps of stacking mechanism 400, can prevent in this way
Manipulator breaks negative electrode tab.
By the implementation of above-mentioned technique, the application, which will be die cut, realizes seamless interfacing with lamination, transports pole without using magazine
Piece, no material flow line transport pole piece, greatly reduce the cross contamination of positive/negative plate.It is compound by hot pressing, by pole piece with
Diaphragm 100 is fixed together, and improves battery core intensity itself, improves the loose apparent structure of traditional laminated cell, reduce electricity
Core pole piece dislocation risk.Meanwhile it is compound after battery core reduce lithium ion mass transfer distance without air layer between pole piece and diaphragm,
Battery core internal resistance can be reduced to a certain extent.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of lithium ion battery zigzag laminating equipment, which is characterized in that the lithium ion battery zigzag laminating equipment includes:
Diaphragm, the diaphragm upper surface are equipped with several negative electrode tabs, and the diaphragm lower surface is equipped with several positive plates, and
And positive plate is interspersed with negative electrode tab；
Hot-pressing compounding device, it is compound that the hot-pressing compounding device can carry out hot pressing with each negative electrode tab and positive plate to diaphragm；
Stacking mechanism, each section of diaphragm after cutting that break, which can enter in stacking mechanism, carries out zigzag folding and severing diaphragm；
Diaphragm cutting off apparatus is cut off diaphragm by diaphragm cutting off apparatus after stacking mechanism lamination.
2. a kind of lithium ion battery zigzag laminating equipment according to claim 1, which is characterized in that table on the diaphragm
Face and lower surface are respectively equipped with adhesive layer, and negative electrode tab and positive plate pass through adhesive layer respectively and be adhesively fixed on diaphragm.
3. a kind of lithium ion battery zigzag laminating equipment according to claim 1, which is characterized in that the lithium-ion electric
Pond zigzag laminating equipment further includes two release film decoiling equipments and two release film wrap-ups, two release film winding dresses
It sets and is symmetricly set on diaphragm or more two sides, release film can be laid in the upper surface or lower surface of diaphragm by release film decoiling equipment,
And contacted respectively with each negative electrode tab or positive plate, two release film unwinding devices are symmetricly set on diaphragm two sides, and position up and down
In hot-pressing compounding device side, release film decoiling equipment can receive the release film being laid on the upper surface or lower surface of diaphragm
It returns.
4. a kind of lithium ion battery zigzag laminating equipment according to claim 3, which is characterized in that the hot pressing is compound
Device includes two metal rollers with heating pressurization function, the two metal rollers are symmetricly set on up and down the two of diaphragm
Side, and metal roller is between release film decoiling equipment and release film wrap-up.
5. a kind of lithium ion battery zigzag lamination process, which is characterized in that the lithium ion battery zigzag lamination process includes
Following steps:
(1) first anode volume and cathode volume are die cut or are cut, then distinguish adhesion die in the upper and lower surfaces of diaphragm
Negative electrode tab and positive plate after cutting or cutting, and positive plate is interspersed with negative electrode tab；
(2) then that diaphragm and each negative electrode tab and positive plate progress hot pressing is compound；
(3) it finally carries out zigzag and folds simultaneously severing diaphragm.
6. a kind of lithium ion battery zigzag lamination process according to claim 5, which is characterized in that
After anode volume and cathode volume are die cut or cut, vision is carried out by manipulator or CCD is positioned, it is negative after being die cut or cut
Pole piece and positive plate are individually positioned in the upper and lower surfaces of diaphragm.
7. a kind of lithium ion battery zigzag lamination process according to claim 5, which is characterized in that diaphragm is born with each
Pole piece and positive plate carry out hot pressing it is compound before, can the upper and lower surfaces of diaphragm divide equally not Ping Pu one layer of release film, it is release
Film is contacted with each negative electrode tab and positive plate respectively, will be laid in after hot pressing is compound release in the upper and lower surfaces of diaphragm
Film is withdrawn.
8. a kind of lithium ion battery zigzag lamination process according to claim 5, which is characterized in that
It before diaphragm and positive plate and negative electrode tab hot pressing are compound, first pass through a pair of of nip roll and is corrected, then pass through a pair of of band again
Having the metal roller of heating pressurization function to carry out, hot pressing is compound, and nip roll and the circle center distance of metal roller are wide less than pole piece
Degree, the heating temperature of metal roller are 25 DEG C~120 DEG C, and pressure is 100kgf~500kgf.
9. a kind of lithium ion battery zigzag lamination process according to claim 5, which is characterized in that
Diaphragm after hot pressing is compound catches first negative electrode tab on diaphragm by manipulator, pulls in and carries out lamination in stacking mechanism,
Also, stacking mechanism and diaphragm all use fixed form to carry out lamination.
10. a kind of lithium ion battery zigzag lamination process according to claim 9, which is characterized in that lamination and hot pressing are multiple
Cushion space is reserved between conjunction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811109301.2A CN109244554B (en) | 2018-09-21 | 2018-09-21 | Z-shaped lamination equipment and process for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109301.2A CN109244554B (en) | 2018-09-21 | 2018-09-21 | Z-shaped lamination equipment and process for lithium ion battery |
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| CN109244554B CN109244554B (en) | 2020-12-29 |
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