CN105977506A - Square lithium battery and production method therefor - Google Patents

Square lithium battery and production method therefor Download PDF

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Publication number
CN105977506A
CN105977506A CN201610459799.XA CN201610459799A CN105977506A CN 105977506 A CN105977506 A CN 105977506A CN 201610459799 A CN201610459799 A CN 201610459799A CN 105977506 A CN105977506 A CN 105977506A
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China
Prior art keywords
strip
coiling
material strip
cathode sheets
anode
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CN201610459799.XA
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CN105977506B (en
Inventor
黄春章
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Guangdong Haizhong New Energy Equipment Co Ltd
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Guangdong Haizhong New Energy Equipment Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00Primary cells; Manufacture thereof
    • H01M6/005Devices for making primary cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing 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)
  • Battery Electrode And Active Subsutance (AREA)
  • Primary Cells (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a square lithium battery and a production method therefor. According to the square lithium battery, two separators are wound to form a wound pack; a flat part is formed on the middle part, and side packaging edges are formed on the left and right sides of the wound pack; the front ends of a positive plate material band and a negative plate material band are cut to form a positive plate and a negative plate; and the positive plate and the negative plate are coiled between the two separators respectively, so that the positive plate and the negative plate are placed on the two side faces of the separators in the flat part respectively. According to the square lithium battery and the production method therefor, the process is easy to implement; the technical requirements, such as the precision requirement and the like, on the production equipment is relatively low; the production efficiency is high; the equipment cost of the battery production enterprises is lowered; the technical potential dangers of electric leakage and short circuit of the square lithium battery are eliminated; the automatic production is realized easily; the technical requirement on the production equipment is lowered; and the equipment cost of the battery production enterprises is lowered.

Description

A kind of quadrate lithium battery and production method thereof
Technical field
The present invention relates to lithium battery and technical field of producing thereof, especially relate to a kind of quadrate lithium battery And production method.
Background technology
In prior art, quadrate lithium battery includes by barrier film, anode strip and cathode sheets, barrier film, anode strip All cut into cathode sheets square, then barrier film be stacked between anode strip and cathode sheets, by anode strip and Cathode sheets separates.There is electric leakage and the technology hidden danger of short circuit in the rectangular cell of this kind of structure;It addition, it is square Lithium battery has stablizing in higher technology requirement, especially required precision and production process to production equipment Property requirement, its production technology is more complicated, and production efficiency is the highest, it is therefore necessary to improved.
Summary of the invention
The deficiency existed for prior art, it is an object of the invention to provide the production of a kind of quadrate lithium battery Technique, it is easy to accomplish, the technology such as required precision of the equipment of production is required relatively low, production efficiency is high, fall The equipment cost of low battery production enterprise.
The deficiency existed for prior art, it is an object of the invention to provide a kind of quadrate lithium battery, and it disappears Except electric leakage and the technology hidden danger of short circuit, it is easy to accomplish automated production, reduce the technology to the equipment of production and want Ask, reduce the equipment cost of battery production enterprise.
To achieve these goals, the technical solution adopted in the present invention is.
The processing method of a kind of quadrate lithium battery, comprises the following steps,
Unreeled respectively by Liang Ge membrane unwinding mechanism and transfer out two barrier films;
Unreeled respectively by two pole piece unreeling structures and transfer out anode strip material strip and cathode sheets material strip;
What two barrier films, anode strip material strip and cathode sheets material strip were respectively delivered to coiling center is involved in district, And by two barrier film spaced apart anode strip material strips and cathode sheets material strip;
Two shut-off mechanism conveying anode strip material strips and cathode sheets material strip by coiling center side arrive respectively Coiling center be involved in district, after the anode strip material strip transferred out and negative electrode sheet stock reach preseting length, The material strip of anode strip material strip and cathode sheets material strip front end is cut off by two shut-off mechanisms respectively, and is formed respectively One anode strip and a cathode sheets, anode strip and cathode sheets are rolled into the barrier film of the first side, coiling center respectively Between;
Coiling center rotates two barrier films of coiling continuously, cuts off at two shut-off mechanisms and cuts off anode strip respectively After material strip and cathode sheets material strip, two shut-off mechanisms retreat reset, the most again conveying anode sheet stock respectively Band and cathode sheets material strip are involved in district to coiling center;
At coiling central rotation to the second side towards after being involved in district, at the anode strip material strip transferred out and After negative electrode sheet stock reaches preseting length, two shut-off mechanisms are respectively by before anode strip material strip and cathode sheets material strip The material strip of end cuts off, and forms an anode strip respectively and a cathode sheets, anode strip and cathode sheets are involved in respectively Between the barrier film of the second side, coiling center;
Circulating above-mentioned action, two barrier films are with " returning " font coiling mode coiling one layer of cladding one layer Form a volume bag, in the middle part of volume bag, there is an evener, the left and right sides forms an arc cornerite, evener A piece of anode strip or a cathode sheets, the anode strip in evener and cathode sheets is stacked between adjacent two barrier films Staggered interval stacks;
Finished product, after the coiling number of plies reaches to set quantity, takes off volume bag, obtains finished product side from coiling center Shape lithium battery.
Further in technical scheme, anode strip material strip is arranged between two barrier films, by negative electrode sheet stock Band is disposed therein the outer fix of a barrier film.
Further in technical scheme, respectively anode strip material strip and cathode sheets material strip are passed through a material storage mechanism, After two shut-off mechanisms cut off and cut off anode strip material strip and cathode sheets material strip respectively, two pole piece unreeling machines Structure unreels continuously and transfers out anode strip material strip and cathode sheets material strip, and it is right to be stored by corresponding material storage mechanism respectively The anode strip material strip answered and cathode sheets material strip.
Further in technical scheme, two coiling centers are set, set a coiling station and one unload Material station, one of them of two coiling centers of switching moves to coiling station in turn, another moves to Unloading station, barrier film, anode strip and cathode sheets coiling respectively at the coiling center being in coiling station, from Finished quad lithium battery is taken off at the coiling center being in unloading station.
A kind of quadrate lithium battery, the anode strip cutting into lamellar, the cathode sheets cutting into lamellar and two companies The barrier film of continuous rolling, two barrier films are formed so that " returning " font coiling mode coiling one layer are coated with one layer Volume one bag, two barrier films synchronize coiling and form described volume bag, and the inner of two barrier films is respectively positioned in volume bag Heart portion, the outer end of two barrier films is positioned at the outermost layer of volume bag, has an evener, left and right two in the middle part of volume bag Formation side, side bound edge, if volume bag evener be provided with dry tablet anode strip and cathode sheets, at evener every The two sides of film place a piece of anode strip and a piece of cathode sheets respectively.
Further in technical scheme, the outermost layer from the middle part of volume bag to volume bag, the width of volume bag is gradually Increasing, the variation tendency of the width of the anode strip being placed between barrier film is to become larger, and is placed on barrier film Between the variation tendency of width of cathode sheets be to become larger.
Further in technical scheme, every a piece of described anode strip and the dual-side of every a piece of described cathode sheets All being coated with by the side bound edge of described volume bag both sides, the side bound edge of every a piece of described volume bag both sides forms one respectively Arc cornerite.
After using above-mentioned production technology, the present invention the most advantageously: the present invention Technique be easily achieved, the technology such as required precision of the equipment of production is required relatively low, production efficiency is high, fall The equipment cost of low battery production enterprise.
Eliminate electric leakage and the technology hidden danger of short circuit.
The quadrate lithium battery of the present invention eliminates electric leakage and the technology hidden danger of short circuit, it is easy to accomplish automated production, Reduce the technology requirement to the equipment of production, reduce the equipment cost of battery production enterprise.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the embodiment of the present invention one.
Fig. 2 is the structural representation of the quadrate lithium battery of the present invention.
In figure: 1, anode strip 2, cathode sheets 3, barrier film 4, evener 10, anode strip material strip 11, negative electrode Sheet material strip 12, coiling center 13, shut-off mechanism 14, material storage mechanism.
Detailed description of the invention
The following stated is only presently preferred embodiments of the present invention, the most therefore limits protection scope of the present invention.
Embodiment one
The processing method of a kind of quadrate lithium battery, shown in Fig. 1 and 2, comprises the following steps:
Unreeled respectively by Liang Ge membrane unwinding mechanism and transfer out two barrier films 3;
Unreeled respectively by two pole piece unreeling structures and transfer out anode strip material strip 10 and cathode sheets material strip 11;
Two barrier films 3, anode strip material strip 10 and cathode sheets material strip 11 are respectively delivered to coiling center 12 Be involved in district, and by two barrier film 3 spaced apart anode strip material strips 10 and cathode sheets material strip 11;By anode strip Material strip 10 is arranged between two barrier films 3, is disposed therein by cathode sheets material strip 11 outside a barrier film 3 Side position.
Anode strip material strip 10 and negative electrode is carried respectively by two shut-off mechanisms 13 of coiling center 12 side Sheet material strip 11 is involved in district to coiling center 12, at the anode strip material strip 10 transferred out and negative electrode sheet stock After reaching preseting length, two shut-off mechanisms 13 are respectively by before anode strip material strip 10 and cathode sheets material strip 11 The material strip of end cuts off, and forms anode strip 1 and a cathode sheets 2, anode strip 1 and cathode sheets 2 points respectively It is not rolled between the barrier film 3 of side, coiling center 12 first;
Coiling center 12 rotates two barrier films 3 of coiling continuously, cuts off at two shut-off mechanisms 13 and cuts off respectively After anode strip material strip 10 and cathode sheets material strip 11, two shut-off mechanisms 13 retreat reset respectively, the most again Secondary conveying anode strip material strip 10 and cathode sheets material strip 11 are involved in district to coiling center 12;
The second side is rotated to towards after being involved in district, at the anode strip material strip transferred out at coiling center 12 10 and after negative electrode sheet stock reaches preseting length, two shut-off mechanisms 13 are respectively by anode strip material strip 10 and the moon The material strip of pole piece material strip 11 front end cuts off, and forms anode strip 1 and a cathode sheets 2, an anode strip respectively 1 and cathode sheets 2 be rolled into respectively between the barrier film 3 of side, coiling center 12 second;
Respectively anode strip material strip 10 and cathode sheets material strip 11 are passed through a material storage mechanism 14, two cut-outs Mechanism 13 cuts off after cutting off anode strip material strip 10 and cathode sheets material strip 11 respectively, two pole piece unreeling structures Unreel continuously and transfer out anode strip material strip 10 and cathode sheets material strip 11, respectively by corresponding material storage mechanism 14 Store corresponding anode strip material strip 10 and cathode sheets material strip 11;
Circulating above-mentioned action, two barrier films 3 are coated with one layer with " returning " font coiling mode coiling one layer And form a volume bag, volume bag in the middle part of there is an evener 4, the left and right sides forms an arc cornerite, evener A piece of anode strip 1 or a cathode sheets 2, the anode in evener 4 is stacked between adjacent two barrier films 3 of 4 Sheet 1 and cathode sheets 2 interval that interlocks stacks;
Finished product, after the coiling number of plies reaches to set quantity, takes off volume bag, obtains finished product from coiling center 12 Quadrate lithium battery.
Two coiling centers 15 are set, set a coiling station and a unloading station,
One of them of two coiling centers 15 of switching moves to coiling station in turn, another moves to unload Material station, barrier film 3, anode strip 1 and cathode sheets 2 coiling respectively are at the coiling center being in coiling station 15, take off finished quad lithium battery from the coiling center 15 being in unloading station.
Embodiment two
A kind of quadrate lithium battery, as shown in Figure 2, cuts into the anode strip 1 of lamellar, cuts into the moon of lamellar Being shaped as of the barrier film 3 of pole piece 2 and continuous rolling, anode strip 1 and cathode sheets 2 is square, and barrier film 3 is with one Layer is coated with the form coiling of a layer and forms a volume bag, and the inner of barrier film 3 is positioned at the central part of volume bag, every The outer end of film 3 is positioned at the outermost layer of volume bag, and the side bound edge 5 of volume bag both sides forms an arc protuberance respectively. In the middle part of volume bag, there is an evener 4, formation side, left and right sides bound edge 5, if the evener 4 of volume bag is provided with Dry tablet anode strip 1 and cathode sheets 2, the two sides of the barrier film 3 at evener 4 place a piece of anode strip respectively 1 and a piece of cathode sheets 2.
Concrete, quadrate lithium battery includes the barrier film 3 of two continuous rolling, inner all positions of two barrier films 3 In the central part of volume bag, two barrier films 3 synchronize coiling and form described volume bag, the position, outer end of two barrier films 3 Outermost layer in volume bag.In the middle of barrier film in quadrate lithium battery 3 only two, and every barrier film 3 not between Disconnected, by two barrier films 3 together around central part coiling, and to two of evener 4 during coiling It is respectively put into anode strip 1 and cathode sheets 2 between barrier film 3, thus forms quadrate lithium battery, it is possible to by each Sheet anode strip 1 and every a piece of cathode sheets 2 are the most individually kept apart, and eliminate electric leakage and the technology hidden danger of short circuit.
From volume bag middle part to volume bag outermost layer, volume bag width be gradually increased, be placed on barrier film 3 it Between the variation tendency of width of anode strip 1 be to become larger, the cathode sheets 2 being placed between barrier film 3 The variation tendency of width be to become larger.The dual-side of anode strip 1 and every a piece of described cathode sheets 2 is equal It is coated with by the side bound edge 5 of described volume bag both sides.
Other technology of quadrate lithium battery is prior art, as anode strip 1 and cathode sheets 2 are electrically connected There are electrode or lug, repeat no more here.
Above content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, foundation The thought of the present invention, the most all will change, in this specification Hold and should not be construed as limitation of the present invention.

Claims (7)

1. the processing method of a quadrate lithium battery, it is characterised in that: comprise the following steps,
Unreeled respectively by Liang Ge membrane unwinding mechanism and transfer out two barrier films (3);
Unreeled respectively by two pole piece unreeling structures and transfer out anode strip material strip (10) and cathode sheets material strip (11);
Two barrier films (3), anode strip material strip (10) and cathode sheets material strip (11) are respectively delivered to around Volume center (12) be involved in district, and by two barrier films (3) spaced apart anode strip material strip (10) and negative electrode Sheet material strip (11);
Respectively by two shut-off mechanisms (13) conveying anode strip material strip (10) of coiling center (12) side It is involved in district, at the anode strip material strip transferred out to coiling center (12) with cathode sheets material strip (11) (10) and after negative electrode sheet stock reaches preseting length, two shut-off mechanisms (13) are respectively by anode strip material strip (10) cut off with the material strip of cathode sheets material strip (11) front end, and form an anode strip (1) and respectively Cathode sheets (2), anode strip (1) and cathode sheets (2) are rolled into side, coiling center (12) first respectively Between the barrier film (3) in face;
Coiling center (12) rotates two barrier films (3) of coiling continuously, cuts two shut-off mechanisms (13) After disconnected cut-out anode strip material strip (10) respectively and cathode sheets material strip (11), two shut-off mechanisms (13) Retreating reset respectively, conveying anode strip material strip (10) and cathode sheets material strip (11) are to coiling the most again Center (12) be involved in district;
The second side is rotated to towards after being involved in district, at the anode strip transferred out in coiling center (12) After material strip (10) and negative electrode sheet stock reach preseting length, two shut-off mechanisms (13) are respectively by anode strip The material strip of material strip (10) and cathode sheets material strip (11) front end cuts off, and forms an anode strip (1) respectively Coiling center (12) it is rolled into respectively with a cathode sheets (2), anode strip (1) and cathode sheets (2) Between the barrier film (3) of two side faces;
Circulating above-mentioned action, two barrier films (3) are with " returning " font coiling mode coiling one layer of cladding one Layer and form a volume bag, volume bag in the middle part of there is an evener (4), the left and right sides forms an arc cornerite, A piece of anode strip (1) or a cathode sheets (2) is stacked between adjacent two barrier films (3) of evener (4), Anode strip (1) and the staggered interval of cathode sheets (2) in evener (4) stack;
Finished product, after the coiling number of plies reaches to set quantity, takes off volume bag from coiling center (12), obtains Finished quad lithium battery.
The processing method of a kind of quadrate lithium battery the most according to claim 1, it is characterised in that:
Anode strip material strip (10) is arranged between two barrier films (3), cathode sheets material strip (11) is set Put the outer fix of a barrier film (3) wherein.
The processing method of a kind of quadrate lithium battery the most according to claim 1, it is characterised in that:
Respectively anode strip material strip (10) and cathode sheets material strip (11) are passed through a material storage mechanism (14), Two shut-off mechanisms (13) are cut off after cutting off anode strip material strip (10) and cathode sheets material strip (11) respectively, Two pole piece unreeling structures unreel continuously and transfer out anode strip material strip (10) and cathode sheets material strip (11), point Do not stored corresponding anode strip material strip (10) and cathode sheets material strip (11) by corresponding material storage mechanism (14).
The processing method of a kind of quadrate lithium battery the most according to claim 1, it is characterised in that:
Two coiling centers (15) are set, set a coiling station and a unloading station,
One of them of two coiling centers (15) of switching moves to coiling station in turn, another moves To unloading station, barrier film (3), anode strip (1) and cathode sheets (2) coiling respectively are being in coiling work The coiling center (15) of position, takes off finished quad lithium battery from the coiling center (15) being in unloading station.
5. produce according to the processing method of a kind of quadrate lithium battery one of Claims 1-4 Suo Shu A kind of quadrate lithium battery, cut into the anode strip (1) of lamellar and cut into the cathode sheets (2) of lamellar, It is characterized in that: also including the barrier film (3) of two continuous rolling, two barrier films (3) are with " returning " font Coiling mode coiling one layer of cladding one layer and form a volume bag, two barrier films (3) synchronize coiling and form institute Stating volume bag, the inner of two barrier films (3) is respectively positioned on the central part of volume bag, the outer end of two barrier films (3) It is positioned at the outermost layer of volume bag, in the middle part of volume bag, there is an evener (4), formation side, left and right sides bound edge (5), The evener (4) of volume bag is if being provided with dry tablet anode strip (1) and cathode sheets (2), evener (4) place The two sides of barrier film (3) place a piece of anode strip (1) and a piece of cathode sheets (2) respectively.
A kind of quadrate lithium battery the most according to claim 5, it is characterised in that: from the middle part of volume bag To the outermost layer of volume bag, the width of volume bag is gradually increased, the anode strip (1) being placed between barrier film (3) The variation tendency of width be to become larger, the width of the cathode sheets (2) being placed between barrier film (3) Variation tendency be to become larger.
A kind of quadrate lithium battery the most according to claim 5, it is characterised in that: every a piece of described sun The dual-side of pole piece (1) and every a piece of described cathode sheets (2) is all by the side bound edge (5) of described volume bag both sides Cladding, the side bound edge (5) of every a piece of described volume bag both sides forms an arc cornerite respectively.
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CN101667656A (en) * 2008-09-01 2010-03-10 株式会社进宇工程 Apparatus for winding battery roll of secondary battery
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CN203781444U (en) * 2014-03-13 2014-08-20 宁波博大梧桐电池科技有限公司 Automatic paper conveying mechanism for alkaline battery diaphragm paper
CN104681852A (en) * 2015-02-28 2015-06-03 合肥国轩高科动力能源股份公司 Battery roll core winding method and device

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WO2000072398A1 (en) * 1999-05-25 2000-11-30 Leading Edge Technologies, Inc. Apparatus and method for battery cell electrode preparation, assembly and lamination
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CN101667656A (en) * 2008-09-01 2010-03-10 株式会社进宇工程 Apparatus for winding battery roll of secondary battery
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