CN104157914B - A kind of high power flexible packing lithium ion battery and manufacture craft thereof - Google Patents
A kind of high power flexible packing lithium ion battery and manufacture craft thereof Download PDFInfo
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- CN104157914B CN104157914B CN201410443798.7A CN201410443798A CN104157914B CN 104157914 B CN104157914 B CN 104157914B CN 201410443798 A CN201410443798 A CN 201410443798A CN 104157914 B CN104157914 B CN 104157914B
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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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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
Abstract
The present invention relates to high power flexible packing lithium ion battery and manufacture craft thereof.This monomer battery core comprises negative plate, positive plate, the first barrier film and the second barrier film and stacks according to the order of the first barrier film, negative plate, the second barrier film, positive plate, and positive plate is at innermost layer, and winding is obtained.Lithium ion battery of the present invention arranges one section of positive pole first island district without coating active material and positive pole second island district in a distance, positive pole ear both sides, during winding, positive pole second island district and positive pole first island district are corresponding respectively and wrap up the back side of negative lug and negative lug, avoid the positive anticathode lug of positive active material and produce and analyse lithium; In preparation method, cold pressing by carrying out heat to battery before changing into, electrolyte unnecessary in battery is clamp-oned air bag, improve battery hardness, make each layer barrier film, positive plate contacts with negative plate tightr, cell interface impedance reduces, and to reduce the internal resistance of cell, improves the power energy density of lithium ion battery.
Description
Technical field
The invention belongs to field of lithium ion battery, relate to a kind of lithium ion battery and manufacture craft thereof, particularly relate to a kind of high power flexible packing lithium ion battery and manufacture craft thereof.
Background technology
For meeting the requirement of market for large capacity version motive power flexible package lithium ion, need when strict control pole piece surface density to realize by increasing pole piece length.But to adopting the power lithium-ion battery of winding process, the long meeting of pole piece brings unnecessary trouble to production process, causes product fraction defective to rise, and adopts the internal resistance of cell of long pole piece large, be unfavorable for the high current charge-discharge of electrokinetic cell, the serious raising hindering its power energy density.
In Chinese patent literature CN203119046U, mention a kind of pole piece structure be placed in by positive pole ear in the middle of positive plate, reduce lithium ion battery internal resistance, solve cycle performance of lithium ion battery poor, the problem of consistency difference.But the structure that the method negative pole does not adopt lug to be placed in the middle of pole piece reduces DeGrain to the internal resistance of cell.In Chinese patent literature CN202905842U, mention a kind of positive and negative lug be all welded on the middle pole piece structure of pole piece, reduce the internal resistance of cell further, improve battery efficiency and useful life.In these two patents, positive plate lug right-hand member certain distance and anode ear welding position reverse side left end certain distance, a blank foil district without coating active material is not all set, be referred to as in industry when " island district " avoids negative electrode lug to reel just to anode material district, a series of thermal runaway phenomenon that such pole piece structure can cause battery to produce after charging analysing lithium phenomenon and cause, reduce battery security.Therefore, be necessary to arrange a Duan Dao district in this position, improve the fail safe of battery.
The both positive and negative polarity pole piece of flexible packing lithium ion battery, barrier film is cellular diaphragm structure, there is certain imbibition ability, after fluid injection, standing a period of time can produce the separation of expanding and occurring between layers because of imbibition, barrier film is caused to contact defective tightness with pole piece, interface impedance is increased, when changing into, interfacial reaction is uneven, be unfavorable for that negative terminal surface forms fine and close solid electrolyte interface film (SEI film), in addition can there is air-generating reaction in formation process, then more aggravate the generation of this adverse effect, when formation voltage is more than 3.95V, the place that negative terminal surface SEI film is loose can produce analyses lithium phenomenon, potential safety hazard can be brought on the one hand to electrokinetic cell, increase the internal resistance of cell, on the other hand because flexible packing lithium ion battery shell is the softer aluminum plastic film of material, battery core 3.9-4.1V deformation comparatively aluminium/lithium-ion battery with steel shell show more obvious, need in this voltage range, to carry out hot fixture shaping to battery core after changing into end, release inside battery stress, eliminates battery core metaboly.And during by formation voltage being reduced to 3.95V to avoid and changing into, analyse lithium phenomenon, be unfavorable for the hot fixture shaping effect of battery.Therefore, for reducing the large capacity version flexible packaging power lithium ion internal resistance of cell, improving its power energy density, improving battery core metaboly, be necessary before flexible packing lithium ion battery changes into, by certain way, the contact that inside battery is comparatively fluffy between layers become more tight.
Summary of the invention
The present invention is directed to the defect and deficiency that exist in above-mentioned prior art, a kind of high-power energy density flexible packing lithium ion battery and manufacturing process thereof are provided.
Term illustrates:
Island district: island of the present invention district is term known in this field, refers to after electric core winding, on anode pole piece band, positive anticathode tab welding position positive and negative, does not apply the blank foil district of positive active material.
Coating line: coating line of the present invention is term known in this field, refers to island district or edge, clear area, i.e. the critical part of active material and pole piece band.
Technical scheme of the present invention is as follows:
A kind of winding monomer battery core, this monomer battery core comprises negative plate, positive plate, the first barrier film and the second barrier film and stacks according to the order of the first barrier film, negative plate, the second barrier film, positive plate, and positive plate is at innermost layer, and winding is obtained;
When monomer battery core is launched, described positive plate comprises anode pole piece band, the both sides of described anode pole piece band are provided with positive active material, the side of described anode pole piece band is provided with positive pole ear, positive pole first island district and positive pole first clear area, and the opposite side of described anode pole piece band is provided with positive pole second island district, positive pole second clear area and positive pole the 3rd clear area; Described positive pole ear and positive pole second clear area are positioned at the centre position of anode pole piece band and are oppositely arranged, and described positive pole first island district and positive pole second island district lay respectively at the both sides of positive pole ear; Described positive pole first clear area and positive pole the 3rd clear area are positioned at the both sides of anode pole piece band and are arranged on the end of anode pole piece band;
Described negative plate comprises cathode pole piece band, and the both sides of described cathode pole piece band are provided with negative electrode active material, the both sides of described cathode pole piece band and be positioned at middle position and be relatively set with negative lug and negative pole clear area.
According to the present invention, preferably, described positive pole first island offset is from positive pole ear 0-270mm, and described positive pole second island offset is from positive pole second clear area 0-270mm.
According to the present invention, preferably, described positive pole ear and the width of negative lug are 5-70mm, and thickness is 0.1-0.2mm.
According to the present invention, preferably, described positive pole first island district and positive pole second island sector width are 13-80mm.
According to the present invention, preferably, described positive pole first clear area width is 0-220mm, and described positive pole the 3rd clear area width is 15-620mm.
According to the present invention, preferably, described positive pole second clear area and the width of negative pole clear area are 6-75mm.
According to the present invention, preferably, described anode pole piece band is aluminium foil material, and described cathode pole piece band is Copper Foil material.
According to the present invention, preferably, described positive pole ear is aluminium material, and described negative lug is nickel, copper or copper nickel plating material.
According to the present invention, preferably, described positive pole first island district, positive pole first clear area, positive pole second island district and positive pole the 3rd clear area are provided with polyethylene terephthalate insulating adhesive tape, insulating tape thickness is 0.02-0.04mm, insulating tape width 0.5-1mm wider than the width of positive pole first island district, positive pole first clear area, positive pole second island district and positive pole the 3rd clear area, insulating tape length 2-8mm longer than the length of positive pole first island district, positive pole first clear area, positive pole second island district and positive pole the 3rd clear area; Described positive pole second clear area is provided with polyethylene terephthalate insulating adhesive tape, insulating tape thickness is 0.02-0.04mm, insulating tape length head of district 2-8mm more blank than positive pole second, insulating tape width 2.5-6.5mm wider than positive pole second clear area width.
According to the present invention, preferably, only in coating line position, positive pole first island district, coating line position, positive pole first clear area, coating line position, positive pole second island district and coating line position, positive pole the 3rd clear area arrange polyethylene terephthalate insulating adhesive tape, insulating tape touch coating line both sides 2-8mm.
According to the present invention, preferably, described negative pole clear area is provided with polyimides acrylic insulating tape, and insulating tape thickness is 0.055-0.065mm, the width 2-8mm wider than the width of negative pole clear area of insulating tape, the length 1.5-5.5mm longer than the length of negative pole clear area of insulating tape.
According to the present invention, preferably, described positive pole ear and negative lug expose 10-20mm, and exposed parts is respectively arranged with tab, the edge 1.5-2.5mm of tab distance anode pole piece band or cathode pole piece band; Tab material is yellow glue, white glue or black glue.
According to the present invention, described positive active material and negative electrode active material are this area conventional ingredient, preferably, described positive active material is LiMn2O4, conductive agent and the binding agent slurry after being uniformly mixed, and described negative electrode active material is Delanium, conductive agent and the binding agent slurry after being uniformly mixed.
According to the present invention, a kind of high power flexible packing lithium ion battery, inside battery comprises at least one above-mentioned winding monomer battery core, preferred, and the number of winding monomer battery core is 2, composes in parallel two core battery.Winding monomer battery core can obtain rectangular lithium ion battery through pressure core.
According to the present invention, a kind of preparation method of high power flexible packing lithium ion battery, step is as follows:
(1) by LiMn2O4, carbon black conductive agent (SP), binding agent Kynoar (PVDF) according to (90-100): (2-4): the quality proportioning of (1-3) stirs, make slip, obtain positive active material;
By Delanium, carbon black conductive agent (SP), binding agent sodium carboxymethylcellulose (CMC), thickener styrene butadiene rubbers (SBR) according to (94-97): (0.5-2): (1-2): the quality proportioning of (1-3) stirs, make slip, obtain negative electrode active material;
(2) positive active material and negative electrode active material are coated in the surface of anode pole piece band and the surface of cathode pole piece band respectively, wherein, positive pole ear place, positive pole first island district, positive pole first clear area, positive pole second island district, positive pole second clear area and positive pole the 3rd clear area do not apply positive active material; Negative lug place and negative pole clear area do not apply negative electrode active material;
The coating density of described positive active material is 160-210g/m
2,
The coating density of described negative electrode active material is 60-100g/m
2;
Then, drying, roll-in and cut, by the lug of positive pole ear place and negative lug place welded bands tab, or the lug of welding not with tab is for making compound lithium ion battery core, obtains positive plate and negative plate;
(3) stack by the order of the first barrier film, negative plate, the second barrier film, positive plate, positive plate is at innermost layer, obtained for step (2) negative plate and positive plate are reeled with the first barrier film and the second barrier film, anode pole piece band and cathode pole piece band are all wound into core be welded with lug one placement that faces up;
The first described barrier film and the second barrier film are polypropylene diaphragm, polyethylene diagrams, ceramic coated polypropylene diaphragm, Kynoar (PVDF) apply polypropylene diaphragm or the barrier film of polypropylene-polyethylene-polypropylene three-layer-material composition, and reel the complete monomer battery core that must reel;
Or, by parallel at least two above-mentioned winding monomer battery core welding, use insulating tape to fix, obtain compound lithium ion battery core;
(4) winding monomer battery core step (3) obtained or compound lithium ion battery core are colded pressing through encapsulation, vacuum bakeout, fluid injection, heat, are changed into, and to obtain final product;
Described hot pressing and the parameter of colding pressing as follows:
Hot pressing: surface pressure 1-6kgf/cm
2, each quantity 2-16, pressure core, hot pressing temperature 60-80 DEG C, hot pressing time 20-180S;
Cold pressing: surface pressure 1-6kgf/cm
2, only, cold pressing each pressure core quantity 2-16 temperature 25-30 DEG C, and cold pressing time 20-180S.
According to the present invention, preferably, the coating density of the positive active material described in step (2) is 180-185g/m
2, the coating density of described negative electrode active material is 65-70g/m
2.
According to the present invention, preferably, in step (2) after the surface of anode pole piece band and the surface-coated active material of cathode pole piece band, positive pole first island district, positive pole first clear area, polyethylene terephthalate insulating adhesive tape is pasted in positive pole second island district and positive pole the 3rd clear area, insulating tape thickness is 0.02-0.04mm, insulating tape width is than positive pole first island district, positive pole first clear area, the wide 0.5-1mm of width of positive pole second island district and positive pole the 3rd clear area, insulating tape length is than positive pole first island district, positive pole first clear area, the long 2-8mm of length of positive pole second island district and positive pole the 3rd clear area, polyethylene terephthalate insulating adhesive tape is pasted in positive pole second clear area, and insulating tape thickness is 0.02-0.04mm, insulating tape length head of district 2-8mm more blank than positive pole second, insulating tape width 2.5-6.5mm wider than positive pole second clear area width,
Polyimides acrylic insulating tape is pasted in negative pole clear area, and insulating tape thickness is 0.055-0.065mm, the length 2-8mm longer than the length of negative pole clear area of insulating tape, the width 1.5-5.5mm wider than the width of negative pole clear area of insulating tape.
According to the present invention, preferably, in step (3), the mode of at least two winding monomer battery core welding in parallel passes through ultrasonic bonding.During winding, positive plate is at innermost layer, and with positive plate ending, after winding terminates, the outermost layer being exposed at core is the 3rd clear area on anode pole piece band.
According to the present invention, electrolyte is that electrolyte is commonly used in this area, preferably, electrolyte solvent described in step (4) is the mixed system of ethylene carbonate (EC), diethyl carbonate (DEC) and methyl ethyl ester (EMC), and electrolyte is lithium hexafluoro phosphate (LiPF
6), and adding 1,2-vinylene carbonate (VC) as additive, reservoir quantity is noted according to 4.0g/Ah ± 0.1g.
Preferred, also comprise secondary encapsulation and partial volume step after changing into.
High power flexible packing lithium ion battery inside of the present invention comprises at least one winding monomer battery core, each winding monomer battery core is all respectively arranged with positive pole ear and negative lug, and be arranged on the centre position of anode pole piece band and cathode pole piece band, wherein said anode pole piece band is provided with positive pole first island district and positive pole second island district, it effectively can reduce the internal resistance of cell when ensureing that battery capacity is constant, improves its fail safe.
Beneficial effect of the present invention is as follows:
1, inside lithium ion cell of the present invention comprises at least one winding monomer battery core, each winding monomer battery core is all respectively arranged with positive and negative lug, the identical lug of wherein said monomer battery core polarity to be welded as a whole formation composite battery core by the mode of ultrasonic bonding, the internal resistance of cell is low, and power energy density is high.
2, lithium ion battery of the present invention arranges one section of positive pole first island district without coating active material and positive pole second island district in a distance, positive pole ear both sides, during winding, positive pole second island district and positive pole first island district are corresponding respectively and wrap up the back side of negative lug and negative lug, avoid the positive anticathode lug of positive active material and produce and analyse lithium.
In the preparation method of 3, high power flexible packing lithium ion battery of the present invention, cold pressing by carrying out heat to battery before changing into, electrolyte unnecessary in battery is clamp-oned air bag, improve battery hardness, make each layer barrier film, positive plate contacts with negative plate tightr, cell interface impedance reduces, and to reduce the internal resistance of cell, improves the power energy density of lithium ion battery.
4, because positive pole ear of the present invention and negative lug lay respectively at the centre position of anode pole piece band and cathode pole piece band, and anode pole piece band arranges different island district, two positions, thus ensureing on the basis that flexible packing lithium ion battery capacity is constant, effectively can reduce the internal resistance of cell, reduce quantity of heat production during battery discharge, the high rate performance of battery can be improved again, battery can also be avoided to analyse lithium from its fail safe of raising.
Accompanying drawing explanation
Fig. 1 be the embodiment of the present invention 1 reel monomer battery core positive plate launch time generalized section.
Fig. 2 be the embodiment of the present invention 1 reel monomer battery core negative plate launch time generalized section.
Fig. 3 is the perspective view of the embodiment of the present invention 2 compound lithium ion battery core.
Fig. 4 is the 3C discharge curve that the embodiment of the present invention 5 and comparative example 1-2 make the battery obtained.
Wherein, 11-anode pole piece band, 12-positive active material, 13-positive pole ear, 14-positive pole first island district, 15-positive pole first clear area, 16-positive pole second island district, 17-positive pole second clear area, 18-positive pole the 3rd clear area;
21-cathode pole piece band, 22-negative electrode active material, 23-negative lug, 24-negative pole clear area;
31-monomer battery core, 32-insulating tape, 33-compound lithium ion battery core anode ear, 34-compound lithium ion battery core negative electrode lug, 35-tab, 36-weld.
Embodiment
In order to understand the present invention better, describe technical scheme of the present invention in detail with instantiation below, but the present invention is not limited thereto.
In embodiment, positive active material 12 is LiMn2O4: conductive agent SP: the slurry that binding agent PVDF mixes according to the proportioning of 95:3:2, negative electrode active material 22 is Delanium: conductive agent SP: binding agent CMC: the slurry that thickener SBR mixes according to the proportioning of 95.4:1:1.6:2, and winding monomer battery core capacity is 5Ah.
The solvent of electrolyte is the mixed system of ethylene carbonate (EC), diethyl carbonate (DEC) and methyl ethyl ester (EMC), and electrolyte is lithium hexafluoro phosphate (LiPF
6), and add 1,2-vinylene carbonate (VC) as additive.
Embodiment 1, winding monomer battery core
A kind of winding monomer battery core, this monomer battery core comprises negative plate, positive plate, the first barrier film and the second barrier film and stacks according to the order of the first barrier film, negative plate, the second barrier film, positive plate, and positive plate is at innermost layer, and winding is obtained;
When monomer battery core is launched, described positive plate comprises anode pole piece band 11, evenly there is positive active material 12 both sides of described anode pole piece band 11, the side of described anode pole piece band 11 is provided with positive pole ear 13, positive pole first island district 14 and positive pole first clear area 15, and the opposite side of described anode pole piece band 11 is provided with positive pole second island district 16, positive pole second clear area 17 and positive pole the 3rd clear area 18; Described positive pole ear 13 and positive pole second clear area 17 are positioned at the centre position of anode pole piece band 11 and are oppositely arranged, and described positive pole first island district 14 and positive pole second island district 16 lay respectively at the both sides of positive pole ear 13; Described positive pole first clear area 15 and positive pole the 3rd clear area 18 are positioned at the both sides of anode pole piece band 11 and are arranged on the end of anode pole piece band 11;
Described negative plate comprises cathode pole piece band 21, and the both sides of described cathode pole piece band 21 are evenly provided with negative electrode active material 22, the both sides of described cathode pole piece band 21 and be positioned at middle position and be relatively set with negative lug 23 and negative pole clear area 24.
In the present embodiment, described positive pole first island district 14 is 32mm with the distance of positive pole ear 13, and described positive pole second island district 16 is 32mm with the distance of positive pole second clear area 17;
Described positive pole ear 13 and the width of negative lug 23 are 15mm, and thickness is 0.2mm;
Described positive pole first island district 14 and district 16, positive pole second island width are 35mm;
Described positive pole first clear area 15 width is 58mm, and described positive pole the 3rd clear area 18 width is 180mm;
Described positive pole second clear area 17 and the width of negative pole clear area 24 are 24mm;
Described anode pole piece band 11 is aluminium foil material, and described cathode pole piece band 21 is Copper Foil material;
Described positive pole ear 13 is aluminium material, and described negative lug 23 is copper nickel plating material;
Described coating line position, district 14, positive pole first island, coating line position, positive pole first clear area 15, coating line position, district 16, positive pole second island and coating line position, positive pole the 3rd clear area 18 are provided with polyethylene terephthalate (PET) insulating tape, insulating tape thickness is 0.02mm, insulating tape touch coating line both sides 5mm, insulating tape width 1mm wider than the width of positive pole first island district 14, positive pole first clear area 15, positive pole second island district 16 and positive pole the 3rd clear area 18; Positive pole second clear area 17 is provided with polyethylene terephthalate insulating adhesive tape, and insulating tape thickness is 0.02-0.04mm, insulating tape length than the long 6mm in positive pole second clear area 17, insulating tape width 2.5mm wider than positive pole second clear area 17 width;
Described negative pole clear area 24 is provided with polyimides acrylic insulating tape, and insulating tape thickness is 0.055mm, the length 6mm longer than the length of negative pole clear area 24 of insulating tape, the width 1.5mm wider than the width of negative pole clear area 24 of insulating tape;
Described positive pole ear 13 and negative lug 23 expose outside 20mm, and exposed parts arranges tab respectively.The edge 2mm of tab distance anode pole piece band 11 or cathode pole piece band 21; Tab material is yellow glue;
On anode pole piece band 11, positive active material 12 coated side density is 185mg/cm
2, on cathode pole piece band 21, negative electrode active material 22 coated side density is 76mg/cm
2.
Embodiment 2, compound lithium ion battery core
Obtain after the winding monomer battery core parallel connection that the battery core that the present embodiment obtains is obtained by two embodiments 1, place according to the order of lug " the left positive right side is born " time in parallel, after in parallel, capacity is 10Ah.
Embodiment 3, winding monomer battery core
Winding monomer battery core as described in Example 1, unlike:
Described positive pole first island district 14 is 270mm with the distance of positive pole ear 13, and described positive pole second island district 16 is 270mm with the distance of positive pole second clear area 17;
Described positive pole ear 13 and the width of negative lug 23 are 70mm, and thickness is 0.2mm;
Described positive pole first island district 14 and district 16, positive pole second island width are 80mm;
Described positive pole first clear area 15 width is 220mm, and described positive pole the 3rd clear area 18 width is 620mm;
Described positive pole second clear area 17 and the width of negative pole clear area 24 are 75mm;
Described negative lug 23 is copper material;
On anode pole piece band 11, positive active material 12 coated side density is 210mg/cm
2, on cathode pole piece band 21, negative electrode active material 22 coated side density is 100mg/cm
2.
Embodiment 4, winding monomer battery core
Winding monomer battery core as described in Example 1, unlike:
Described positive pole first island district 14 is 10mm with the distance of positive pole ear 13, and described positive pole second island district 16 is 10mm with the distance of positive pole second clear area 17;
Described positive pole ear 13 and the width of negative lug 23 are 5mm, and thickness is 0.1mm;
Described positive pole first island district 14 and district 16, positive pole second island width are 13mm;
Described positive pole first clear area 15 width is 10mm, and described positive pole the 3rd clear area 18 width is 15mm;
Described positive pole second clear area 17 and the width of negative pole clear area 24 are 6mm;
Described negative lug 23 is nickel material;
On anode pole piece band 11, positive active material 12 coated side density is 160mg/cm
2, on cathode pole piece band 21, negative electrode active material 22 coated side density is 60mg/cm
2.
Embodiment 5
A preparation method for high power flexible packing lithium ion battery, comprise the compound lithium ion battery core used described in embodiment 2, step is as follows:
(1) LiMn2O4, conductive agent SP, binding agent PVDF are stirred according to the proportioning of 95:3:2, make slip, obtain positive active material 12;
Delanium, conductive agent SP, binding agent CMC, thickener SBR are stirred according to the proportioning of 95.4:1:1.6:2, makes slip, obtain negative electrode active material 22;
(2) positive active material 12 and negative electrode active material 22 are coated in the surface of anode pole piece band 11 and the surface of cathode pole piece band 21 respectively, wherein, positive pole ear 13 place, positive pole first island district 14, positive pole first clear area 15, positive pole second island district 16, positive pole second clear area 17 and positive pole the 3rd clear area 18 do not apply positive active material 12; Negative lug 23 place and negative pole clear area 24 do not apply negative electrode active material 22;
After the surface of anode pole piece band 11 and the surface-coated active material of cathode pole piece band 21, coating line position, district 14, positive pole first island, coating line position, positive pole first clear area 15, coating line position, district 16, positive pole second island and coating line position, positive pole the 3rd clear area 18 are provided with polyethylene terephthalate (PET) insulating tape, insulating tape thickness is 0.02mm, insulating tape touch coating line both sides 5mm, insulating tape width 1mm wider than the width of positive pole first island district 14, positive pole first clear area 15, positive pole second island district 16 and positive pole the 3rd clear area 18; Positive pole second clear area 17 is provided with polyethylene terephthalate insulating adhesive tape, and insulating tape thickness is 0.02-0.04mm, insulating tape length than the long 6mm in positive pole second clear area 17, insulating tape width 2.5mm wider than positive pole second clear area 17 width;
Described negative pole clear area 24 is provided with polyimides acrylic insulating tape, and insulating tape thickness is 0.055mm, the length 6mm longer than the length of negative pole clear area 24 of insulating tape, the width 1.5mm wider than the width of negative pole clear area 24 of insulating tape;
The coating density of described positive active material 12 is 185g/m
2,
The coating density of described negative electrode active material 22 is 76g/m
2;
Then, drying, roll-in and cut, be used for making compound lithium ion battery core by positive pole ear 13 place and the negative lug 23 place lug of welding not with tab, obtain positive plate and negative plate;
(3) stack by the order of the first barrier film, negative plate, the second barrier film, positive plate, positive plate is at innermost layer, obtained for step (2) negative plate and positive plate are reeled with the first barrier film and the second barrier film, anode pole piece band 11 and cathode pole piece band 21 are all wound into core be welded with lug one placement that faces up, finish up with positive plate, after winding terminates, the outermost layer being exposed at core is the 3rd clear area 18 of anode pole piece band 11;
Described barrier film material is polypropylene, and reel the complete monomer battery core that must reel;
The winding monomer battery core two steps (3) obtained is in parallel by the mode of ultrasonic bonding, and uses insulating tape to fix, and obtains compound lithium ion battery core;
As shown in Figure 3: during welding, compound lithium ion battery core anode ear 33 and compound lithium ion battery core negative electrode lug 34 head are placed down, tab 35 top edge is apart from barrier film top edge 1 ± 0.5mm; After lug parallel connection welding terminates, compound lithium ion battery core anode ear 33 and compound lithium ion battery core negative electrode lug 34 are turned down upward, prunes weld 36 with scissors, unnecessary lug is cut, makes weld 36 just in time concordant with battery core 31 edge of outermost end; Insulating tape 32 is pasted in weld 36 lower end, insulating tape 32 1-2mm wider than weld 36, and with insulating tape 32, weld 36 is fixed on core upper end;
(4) Combined roll step (3) obtained is colded pressing around monomer battery core through encapsulation, 80 DEG C of vacuum bakeouts, fluid injection, heat, is changed into, and secondary encapsulation, partial volume, to obtain final product;
Described reservoir quantity is 39.9 ~ 40.1g
Described hot pressing and the parameter of colding pressing as shown in table 1:
Table 1
| Pressure core mode | Pressure (kgf) | Temperature (DEG C) | Time (S) | Pressure core quantity (PCS) |
| Hot pressing | 663 | 75 | 40 | 2 |
| Cold pressing | 663 | 25 | 70 | 2 |
Comparative example 1
The preparation method of high power flexible packing lithium ion battery as described in Example 5, unlike, step does not carry out hot cold press operation in (5).
Comparative example 2
Winding monomer battery core as described in Example 1, is separately positioned on described anode pole piece band 11 and the end of cathode pole piece band 21 unlike described positive pole ear 13 and negative lug 23.
By the step of embodiment 5, the winding monomer battery core of this comparative example is obtained flexible packing lithium ion battery.
Experimental example
The flexible packing lithium ion battery that embodiment 5, comparative example 1 and comparative example 2 is obtained carries out electrical performance data test, result as table 2, shown in Fig. 4.
Table 2 three kinds of embodiments make battery electrical property statistical average
Known by table 2 Data Comparison, the flexible packing lithium ion battery internal resistance that the present invention makes is less, and power energy density is higher.
Known by Fig. 4 different battery 3C discharge curve, the high rate performance during high-power energy density flexible packing lithium ion battery heavy-current discharge that the present invention makes is better.
Claims (9)
1. reel a monomer battery core, and it is characterized in that, this monomer battery core comprises negative plate, positive plate, the first barrier film and the second barrier film and stacks according to the order of the first barrier film, negative plate, the second barrier film, positive plate, and positive plate is at innermost layer, and winding is obtained;
When monomer battery core is launched, described positive plate comprises anode pole piece band, the both sides of described anode pole piece band are provided with positive active material, the side of described anode pole piece band is provided with positive pole ear, positive pole first island district and positive pole first clear area, and the opposite side of described anode pole piece band is provided with positive pole second island district, positive pole second clear area and positive pole the 3rd clear area; Described positive pole ear and positive pole second clear area are positioned at the centre position of anode pole piece band and are oppositely arranged, and described positive pole first island district and positive pole second island district lay respectively at the both sides of positive pole ear; Described positive pole first clear area and positive pole the 3rd clear area are positioned at the both sides of anode pole piece band and are arranged on the end of anode pole piece band;
Described positive pole first island offset is from positive pole ear 0-270mm, and described positive pole second island offset is from positive pole second clear area 0-270mm;
Described positive pole first island district and positive pole second island sector width are 13-80mm;
Described island district refers to after electric core winding, and on anode pole piece band, positive anticathode tab welding position positive and negative, does not apply the blank foil district of positive active material;
Described negative plate comprises cathode pole piece band, and the both sides of described cathode pole piece band are provided with negative electrode active material, the both sides of described cathode pole piece band and be positioned at middle position and be relatively set with negative lug and negative pole clear area.
2. winding monomer battery core according to claim 1, is characterized in that, described positive pole ear and the width of negative lug are 5-70mm, and thickness is 0.1-0.2mm;
Described positive pole first clear area width is 0-220mm, and described positive pole the 3rd clear area width is 15-620mm;
Described positive pole second clear area and the width of negative pole clear area are 6-75mm.
3. winding monomer battery core according to claim 1, is characterized in that, described anode pole piece band is aluminium foil material, and described cathode pole piece band is Copper Foil material;
Described positive pole ear is aluminium material, and described negative lug is nickel, copper or copper nickel plating material.
4. winding monomer battery core according to claim 1, it is characterized in that, described positive pole first island district, positive pole first clear area, positive pole second island district and positive pole the 3rd clear area are provided with polyethylene terephthalate insulating adhesive tape, insulating tape thickness is 0.02-0.04mm, insulating tape width 0.5-1mm wider than the width of positive pole first island district, positive pole first clear area, positive pole second island district and positive pole the 3rd clear area, insulating tape length 2-8mm longer than the length of positive pole first island district, positive pole first clear area, positive pole second island district and positive pole the 3rd clear area; Described positive pole second clear area is provided with polyethylene terephthalate insulating adhesive tape, insulating tape thickness is 0.02-0.04mm, insulating tape length head of district 2-8mm more blank than positive pole second, insulating tape width 2.5-6.5mm wider than positive pole second clear area width;
Described negative pole clear area is provided with polyimides acrylic insulating tape, and insulating tape thickness is 0.055-0.065mm, the length 2-8mm longer than the length of negative pole clear area of insulating tape, the width 1.5-5.5mm wider than the width of negative pole clear area of insulating tape.
5. winding monomer battery core according to claim 1, it is characterized in that, described positive pole ear and negative lug expose 10-20mm, and exposed parts is respectively arranged with tab, the edge 1.5-2.5mm of tab distance anode pole piece band or cathode pole piece band; Tab material is yellow glue, white glue or black glue.
6. a flexible packing lithium ion battery, inside battery comprises at least one winding monomer battery core described in any one of claim 1-5.
7. comprise claim 1 to reel the preparation method of flexible packing lithium ion battery of monomer battery core, step is as follows:
(1) by LiMn2O4, carbon black conductive agent, binding agent Kynoar according to (90-100): (2-4): the quality proportioning of (1-3) stirs, and makes slip, obtains positive active material;
By Delanium, carbon black conductive agent, binding agent sodium carboxymethylcellulose, thickener styrene butadiene rubbers according to (94-97): (0.5-2): (1-2): the quality proportioning of (1-3) stirs, and makes slip, obtains negative electrode active material;
(2) positive active material and negative electrode active material are coated in the surface of anode pole piece band and the surface of cathode pole piece band respectively, wherein, positive pole ear place, positive pole first island district, positive pole first clear area, positive pole second island district, positive pole second clear area and positive pole the 3rd clear area do not apply positive active material; Negative lug place and negative pole clear area do not apply negative electrode active material;
The coating density of described positive active material is 160-210g/m
2,
The coating density of described negative electrode active material is 60-100g/m
2;
Then, drying, roll-in and cut, by the lug of positive pole ear place and negative lug place welded bands tab, or the lug of welding not with tab is for making compound lithium ion battery core, obtains positive plate and negative plate;
(3) stack by the order of the first barrier film, negative plate, the second barrier film, positive plate, positive plate is at innermost layer, obtained for step (2) negative plate and positive plate are reeled with the first barrier film and the second barrier film, anode pole piece band and cathode pole piece band are all wound into core be welded with lug one placement that faces up;
The first described barrier film and the second barrier film are the barrier film of polypropylene diaphragm, polyethylene diagrams, ceramic coated polypropylene diaphragm, ceramic coated polyethylene diagrams, Kynoar coating polypropylene diaphragm, Kynoar coating polyethylene barrier film or polypropylene-polyethylene-polypropylene three-layer-material composition, and reel the complete monomer battery core that must reel;
Or, by parallel at least two above-mentioned winding monomer battery core welding, use insulating tape to fix, obtain compound lithium ion battery core;
(4) winding monomer battery core step (3) obtained or compound lithium ion battery core are colded pressing through encapsulation, vacuum bakeout, injection electrolyte, heat, are changed into, and to obtain final product;
The parameter that described heat is colded pressing is as follows:
Hot pressing: surface pressure 1-6kgf/cm
2, each quantity 2-16, pressure core, hot pressing temperature 60-80 DEG C, hot pressing time 20-180S;
Cold pressing: surface pressure 1-6kgf/cm
2, only, cold pressing each pressure core quantity 2-16 temperature 25-30 DEG C, and cold pressing time 20-180S.
8. the preparation method of flexible packing lithium ion battery according to claim 7, it is characterized in that, in step (2) after the surface of anode pole piece band and the surface-coated active material of cathode pole piece band, positive pole first island district, positive pole first clear area, polyethylene terephthalate insulating adhesive tape is pasted in positive pole second island district and positive pole the 3rd clear area, insulating tape thickness is 0.02-0.04mm, insulating tape width is than positive pole first island district, positive pole first clear area, the wide 0.5-1mm of width of positive pole second island district and positive pole the 3rd clear area, insulating tape length is than positive pole first island district, positive pole first clear area, the long 2-8mm of length of positive pole second island district and positive pole the 3rd clear area, polyethylene terephthalate insulating adhesive tape is pasted in positive pole second clear area, and insulating tape thickness is 0.02-0.04mm, insulating tape length head of district 2-8mm more blank than positive pole second, insulating tape width 2.5-6.5mm wider than positive pole second clear area width,
Polyimides acrylic insulating tape is pasted in negative pole clear area, and insulating tape thickness is 0.055-0.065mm, the length 2-8mm longer than the length of negative pole clear area of insulating tape, the width 1.5-5.5mm wider than the width of negative pole clear area of insulating tape.
9. the preparation method of flexible packing lithium ion battery according to claim 7, it is characterized in that, the solvent of the electrolyte described in step (4) is the mixed system of ethylene carbonate, diethyl carbonate and methyl ethyl ester, electrolyte is lithium hexafluoro phosphate, and add 1,2-vinylene carbonate is as additive, and reservoir quantity is noted according to 4.0g/Ah ± 0.1g.
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| CN114156522A (en) * | 2021-12-02 | 2022-03-08 | 天津市捷威动力工业有限公司 | Hot-pressing compounding process of low-internal-resistance and high-magnification VDA 590 model soft-package battery cell |
| CN114447276B (en) * | 2022-04-11 | 2022-07-19 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202172108U (en) * | 2011-08-26 | 2012-03-21 | 山东齐星新能源科技有限责任公司 | Coiled core structure for lithium ion battery |
| CN102683742A (en) * | 2012-06-12 | 2012-09-19 | 东莞新能源科技有限公司 | Lithium ion battery cell and preparation method thereof |
| CN203119046U (en) * | 2012-12-24 | 2013-08-07 | 东莞市安德丰电池有限公司 | Low internal resistance lithium ion battery rolled core |
| CN103579666A (en) * | 2013-11-04 | 2014-02-12 | 维动新能源股份有限公司 | Composite lithium-ion battery cell with low internal resistance, and preparation technology thereof |
-
2014
- 2014-09-02 CN CN201410443798.7A patent/CN104157914B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202172108U (en) * | 2011-08-26 | 2012-03-21 | 山东齐星新能源科技有限责任公司 | Coiled core structure for lithium ion battery |
| CN102683742A (en) * | 2012-06-12 | 2012-09-19 | 东莞新能源科技有限公司 | Lithium ion battery cell and preparation method thereof |
| CN203119046U (en) * | 2012-12-24 | 2013-08-07 | 东莞市安德丰电池有限公司 | Low internal resistance lithium ion battery rolled core |
| CN103579666A (en) * | 2013-11-04 | 2014-02-12 | 维动新能源股份有限公司 | Composite lithium-ion battery cell with low internal resistance, and preparation technology thereof |
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