CN103413975A - Lithium nickel cobalt manganate cylindrical high-rate battery and preparation method thereof - Google Patents
Lithium nickel cobalt manganate cylindrical high-rate battery and preparation method thereof Download PDFInfo
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- CN103413975A CN103413975A CN2013103373733A CN201310337373A CN103413975A CN 103413975 A CN103413975 A CN 103413975A CN 2013103373733 A CN2013103373733 A CN 2013103373733A CN 201310337373 A CN201310337373 A CN 201310337373A CN 103413975 A CN103413975 A CN 103413975A
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Abstract
The invention belongs to a high-safety lithium nickel cobalt manganate cylindrical high-rate battery and a preparation method thereof. The battery comprises a nickel-plated steel case and a lithium ion battery cell in the nickel-plated steel case, wherein an upper insulating strip and a lower insulating strip are respectively arranged at the upper part and the lower part of the lithium ion battery cell; a cap is arranged on a mechanical seal port in the upper part of the nickel-plated steel case; the lithium ion battery cell comprises a positive plate, a first diaphragm, a negative plate and a second diaphragm which are superposed in sequence and reeled; by setting the positions of a positive pole leading-out end and a negative pole leading-out end and setting the sticking position and manner of a high-temperature adhesive tape, the battery production efficiency can be effectively improved and defects in a processing procedure can be reduced; as the first diaphragm and the second diaphragm are used in combination and electrolytes containing special additives are selected and used to coordinate with one another, the destructive safety performance test of the battery is 100% qualified. The battery has the advantages that the assembly is simple, the yield is high, the cycle performance is good, and the safety performance of resistance to overcharge, short circuit, needling, squeezing, impact and the like can be improved.
Description
Technical field
The invention belongs to technical field of lithium ion, be specifically related to nickle cobalt lithium manganate column type high-multiplying-power battery of a kind of high security and preparation method thereof.
Background technology
Lithium ion battery has that output voltage is high, and specific energy is high, discharging voltage balance, the characteristics that have extended cycle life.So lithium ion battery has been widely used in notebook computer, digital camera, field of mobile phones.And more and more in the power field, the energy storage field obtained application.Power field, lithium ion battery applications on electric tool, electronic toy, motor vehicle the time, need battery that better high rate during charging-discharging is arranged.
The lithium ion battery of large-scale production at present has cylindrical steel housing battery, square bar aluminum-shell battery, square soft-package battery.Although the rectangular cell size is flexible, easy to assembly, the adjustment of lug exit size dimension is more suitable for doing large multiplying power discharging battery flexibly, rectangular cell lamination assembling complexity, withstand voltage properties is poor.And the cylindrical battery production technology is relatively simple, good pressure-resistant performance, and can directly replace the conventional batteries such as nickel chromium triangle, ni-mh, have wide application and development prospect.But in order to improve the high rate performance of cylindrical lithium ion battery, prior art just simply arbitrarily increases the lug exit on the pole piece of conventional batteries design, and pole piece structure does not have corresponding light paper tinsel and gummed paper to improve, electrolyte is not corresponding change also, when causing complex manufacturing, also increased the potential safety hazard in the battery use procedure.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and provide a kind of assembling simple, rate of finished products is high, and can improve nickle cobalt lithium manganate column type high-multiplying-power battery of the security performances such as battery overcharging resisting, short circuit, acupuncture, extruding, impact and preparation method thereof.
The object of the present invention is achieved like this: this column type high-multiplying-power battery comprises the nickel plating box hat, with the lithium-ion electric core that is located at nickel plating box hat inside, the upper and lower of lithium-ion electric core is respectively equipped with insulating trip and lower insulating trip, and the machinery sealing on nickel plating box hat top is provided with block, described lithium-ion electric core comprises the stacked and positive plate of reeling successively, the first barrier film, negative plate and the second barrier film, described positive plate comprises aluminium foil, on the inner peripheral surface of described aluminium foil and surface, outer ring, be respectively equipped with positive electrode active material layer, described inner ring and outer ring positive electrode active material layer tail end are 45mm～75mm with the distance of aluminium foil inner ring and outer ring tail end respectively, the centre position of aluminium foil inner ring positive electrode active material layer is provided with anodal exit, anodal exit top is provided with anode ear, described negative plate comprises Copper Foil, on the inner ring of described Copper Foil and the surface of outer ring, be respectively equipped with negative electrode active material layer, the distance of the negative electrode active material layer of inner ring and Copper Foil inner ring head end is 15mm～40mm, the distance of itself and Copper Foil inner ring tail end is 50mm～80mm, the distance of the negative electrode active material layer of outer ring and Copper Foil outer ring head end is 15mm～40mm, the distance of itself and Copper Foil outer ring tail end is 100mm～130mm, Copper Foil inner ring head end is provided with negative pole the first exit, negative pole the first exit top is provided with the first negative electrode lug, Copper Foil inner ring tail end is provided with negative pole the second exit near the position of negative electrode active material layer, negative pole the second exit top is provided with the second negative electrode lug, described anode ear passes insulating trip and is connected with block, described the first negative electrode lug passes respectively lower insulating trip with the second negative electrode lug and is connected with the bottom of nickel plating box hat.
The material of described anode ear is aluminium, and the material of the first negative electrode lug and the second negative electrode lug is copper.
The head end of described positive plate, the anodal exit of positive plate and positive plate tail end, near the position of positive electrode active material layer, are respectively equipped with high temperature gummed tape on its inner ring and surface, outer ring.
On the Internal and external cycle position of described Copper Foil negative pole the second exit, be respectively equipped with high temperature gummed tape.
The width of described high temperature gummed tape is 10mm～30mm.
A kind of preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery, comprise the steps:
Step 1: prepare positive active material: comprise that following mixed raw material according to parts by weight becomes: 1 part～3 parts binding agents, 92 parts～95 parts nickle cobalt lithium manganates, 1 part～3 parts conductive blacks, 1 part～3 parts electrically conductive graphites and 33 parts～82 parts 1-METHYLPYRROLIDONEs;
Step 2: prepare negative electrode active material: comprise that following mixed raw material according to parts by weight becomes: 92 parts～95 parts graphite, 1 part～3 parts conductive blacks, 3 parts～5 parts binding agents and 100 parts～150 parts deionized waters;
Step 3: the preparation of positive plate: the positive active material prepared in step 1 is coated to respectively on the surface of the inner ring of aluminium foil and outer ring, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min～8min, the positive active material tail end on inner peripheral surface and surface, outer ring is the positive plate of 45mm～75mm with the distance of aluminium foil inner peripheral surface and surface, outer ring tail end respectively;
Step 4: the preparation of negative plate: the negative electrode active material prepared in step 2 is applied respectively on the inner peripheral surface and surface, outer ring of Copper Foil, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min～8min, the distance of the negative electrode active material layer of inner peripheral surface and Copper Foil inner ring head end is 15mm～40mm, the distance of itself and Copper Foil inner ring tail end is 50mm～80mm, the distance of the negative electrode active material layer of outer ring and Copper Foil outer ring head end be 15mm～40mm, itself and Copper Foil outer ring tail end apart from being the negative plate of 100mm～130mm;
Step 5: the installation of anode ear: make in step 3 to apply on the centre position of positive plate inner ring positive electrode active material layer of positive active material and weld anode ear, it on the position of the positive electrode active material layer of anode ear bottom, is anodal exit, at anodal exit, the head end of positive plate and positive plate tail end are near on the position of positive electrode active material layer, and it is 10mm～30mm high temperature gummed tape that width is posted respectively in its inner ring and outer ring;
Step 6: the installation of negative electrode lug: head end welding the first negative electrode lug that makes the negative plate inner ring of coating negative electrode active material in step 4, the corresponding position of the negative plate of the first negative electrode lug bottom is negative pole the first exit, welding the second negative electrode lug on the close position of negative electrode active material layer of negative plate inner ring tail end, the corresponding position of the negative plate of the second negative electrode lug bottom is negative pole the second exit, and negative pole the second exit posts respectively width on the corresponding position of negative plate inner ring and outer ring be 10mm～30mm high temperature gummed tape;
Step 7: prepare lithium-ion electric core: pass through respectively vacuum drying oven by installing the negative plate that installs negative electrode lug in the positive plate of anode ear and step 6 in step 5, under 80 ℃～120 ℃ environment, dry 8h～12h, then according to positive plate, the first barrier film, the order of negative plate and the second barrier film rear coiling that superposes successively, by the sutomatic winding machine that the volume pin is 2.5mm～4mm, reel, positive plate and negative plate are reeled and are finished to get final product, and after reeling, the external diameter of lithium-ion electric core is 95%～100% with the internal diameter ratio of nickel plating box hat;
Step 8: install insulating trip and lower insulating trip: anode ear is arranged on the top of the lithium-ion electric core in step 7, the first negative electrode lug and the second negative electrode lug are arranged on the bottom of the lithium-ion electric core in step 7, make anode ear pass insulating trip, and upper insulating trip is connected with the top of lithium-ion electric core, make the first negative electrode lug and the second negative electrode lug pass lower insulating trip, and lower insulating trip is connected with the bottom of lithium-ion electric core, the first negative electrode lug and the second negative electrode lug are by the center of lithium-ion electric core;
Step 9: weldering basic skill or training order: the lithium-ion electric core of installing insulating trip and lower insulating trip in step 8 is put into to the nickel plating box hat, and by the bottom of the first negative electrode lug and the second negative pole lug welding and nickel plating box hat, the disconnection pulling force after its welding is greater than 10N;
Step 10: slot rolling operation: the oral area that welds the nickel plating box hat after basic skill or training's order in step 9 is carried out to the slot rolling processing;
Step 11: baking operation: the inside lithium-ion electric core that carries out the rear nickel plating box hat of slot rolling processing in step 10 is dried, use the vacuum bakeout case in the temperature environment of 75 ℃～85 ℃, dry 24h～60h;
Step 12: inject the electrolyte operation: inject the electrolyte into the nickel plating box hat inside after completing steps 11 baking operations, this column type high-multiplying-power battery is the nickle cobalt lithium manganate battery that small-sized capacity is no more than 3000mAh, and the injection rate of its electrolyte is 3g/Ah～5g/Ah;
Step 13: sealing process: the nickel plating box hat after injection electrolyte operation in step 12 is sealed to processing, and block is installed at the top that is about to the nickel plating box hat, and makes block and anode ear welding;
Step 14: forming and capacity dividing operation: will carry out column type high-multiplying-power battery after sealing process in step 13 at first with 0.02C～0.05C current charges 4h, then with 0.1C～0.2C current charges 6h, finally with the 0.5C electric current, charge and discharge 2 times, record last discharge capacity be greater than the design nominal capacity be qualified, finished product.
Binding agent in described step 1 and step 2 is selected from the mixture of this rubber of fourth of 1%～2% sodium carboxymethylcellulose and 2%～3%, polyvinylidene fluoride, a kind of in water-base cement.
The first barrier film in described step 7 and the second barrier film are selected from three layers of composite diaphragm of polypropylene, polyethylene/polypropylene, a kind of in single-layer polypropylene barrier film or monolayer polyethylene barrier film, wherein, the thickness of the first barrier film and the second barrier film is 8 μ m～25 μ m, its porosity 30%～45%.
Described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding one or both mixture of 1%～4% biphenyl or 1%～4% cyclohexyl benzene.
Described anode ear is 26mm～72mm for length, and wide is 4mm～6mm, and thick is the aluminium pole ears of 0.10mm～0.15mm, and described the first negative electrode lug and the second negative electrode lug are 26mm～70mm for length, and wide is 3mm～4mm, and thick is the copper polar ear of 0.06mm～0.10mm.
The nickle cobalt lithium manganate column type high-multiplying-power battery of making according to such scheme, overcome traditional concept by the setting to anodal exit and negative pole exit position, with the paste position of high temperature gummed tape and the setting of mode, can effectively improve battery production efficiency and reduce the processing procedure defect, and by with being used in conjunction with of the first barrier film and the second barrier film, select the electrolyte that contains special additive to work in coordination, make the destructive security performance test 100% of battery qualified; Have assembling simple, rate of finished products is high, good cycle, and can improve the advantage of the security performances such as battery overcharging resisting, short circuit, acupuncture, extruding, impact.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of positive plate of the present invention, negative plate inner ring and negative plate outer ring.
Fig. 3 is the structural representation of test example 2
Fig. 4 is lithium-ion electric core structural representation of the present invention.
Fig. 2 is followed successively by positive plate from top to bottom, negative plate inner ring and negative plate inner ring; Fig. 3 is followed successively by positive plate from top to bottom, negative plate inner ring and negative plate inner ring.
Embodiment
As shown in Figure 1, Figure 2 and Figure 4, the present invention is nickle cobalt lithium manganate column type high-multiplying-power battery, this column type high-multiplying-power battery comprises nickel plating box hat 1, with the lithium-ion electric core 2 that is located at nickel plating box hat 1 inside, the upper and lower of lithium-ion electric core 2 is respectively equipped with insulating trip 3 and lower insulating trip 4, and the machinery sealing on nickel plating box hat 1 top is provided with block 5, described lithium-ion electric core 2 comprises the stacked and positive plate 6 of reeling successively, the first barrier film 7, negative plate 8 and the second barrier film 9, described positive plate 6 comprises aluminium foil, on the inner peripheral surface of described aluminium foil and surface, outer ring, be respectively equipped with positive electrode active material layer 13, described inner ring and outer ring positive electrode active material layer 13 tail ends are 45mm～75mm with the distance of aluminium foil inner ring and outer ring tail end respectively, the centre position of aluminium foil inner ring positive electrode active material layer 13 is provided with anodal exit, anodal exit top is provided with anode ear 10, described negative plate 8 comprises Copper Foil, on the inner ring of described Copper Foil and the surface of outer ring, be respectively equipped with negative electrode active material layer 14, the negative electrode active material layer 14 of inner ring is 15mm～40mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 50mm～80mm, the negative electrode active material layer 14 of outer ring is 15mm～40mm with the distance of Copper Foil outer ring head end, the distance of itself and Copper Foil outer ring tail end is 100mm～130mm, Copper Foil inner ring head end is provided with negative pole the first exit, negative pole the first exit top is provided with the first negative electrode lug 12, Copper Foil inner ring tail end is provided with negative pole the second exit near the position of negative electrode active material layer 14, negative pole the second exit top is provided with the second negative electrode lug 11, described anode ear 10 passes insulating trip 3 and is connected with block 5, described the first negative electrode lug 12 passes respectively lower insulating trip 4 with the second negative electrode lug 11 and is connected with the bottom of nickel plating box hat 1.The material of described anode ear 10 is aluminium, and the material of the first negative electrode lug 12 and the second negative electrode lug 11 is copper.The head end of described positive plate 6, the anodal exit of positive plate 6 and positive plate 6 tail ends, near the position of positive electrode active material layer 13, are respectively equipped with high temperature gummed tape 15 on its inner ring and surface, outer ring.On the Internal and external cycle position of described Copper Foil negative pole the second exit, be respectively equipped with high temperature gummed tape 15.The width of described high temperature gummed tape 15 is 10mm～30mm.This column type high-multiplying-power battery described in the present invention is applicable to the lithium ion battery that small-sized capacity is no more than 3000mAh.The surface density 100-150g/m of positive electrode active material layer 13 in the present invention
2, the surface density 50-80g/m of negative electrode active material layer 14
2.While preparing positive active material, the weight of the solid of mixture is 55%～75% of mixture weight; While preparing negative electrode active material, the weight of the solid of mixture is 40%～50% of this mixture weight.
A kind of preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery, comprise the steps:
Step 1: prepare positive active material: comprise that following mixed raw material according to parts by weight becomes: 1 part～3 parts binding agents, 92 parts～95 parts nickle cobalt lithium manganates, 1 part～3 parts conductive blacks, 1 part～3 parts electrically conductive graphites and 33 parts～82 parts 1-METHYLPYRROLIDONEs;
Step 2: prepare negative electrode active material: comprise that following mixed raw material according to parts by weight becomes: 92 parts～95 parts graphite, 1 part～3 parts conductive blacks, 3 parts～5 parts binding agents and 100 parts～150 parts deionized waters;
Step 3: the preparation of positive plate 6: the positive active material prepared in step 1 is coated to respectively on the surface of the inner ring of aluminium foil and outer ring, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min～8min, the positive active material tail end on inner peripheral surface and surface, outer ring is the positive plate 6 of 45mm～75mm with the distance of aluminium foil inner peripheral surface and surface, outer ring tail end respectively;
Step 4: the preparation of negative plate 8: the negative electrode active material prepared in step 2 is applied respectively on the inner peripheral surface and surface, outer ring of Copper Foil, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min～8min, the negative electrode active material layer 14 of inner peripheral surface is 15mm～40mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 50mm～80mm, the negative electrode active material layer 14 of outer ring is 15mm～40mm with the distance of Copper Foil outer ring head end, the distance of itself and Copper Foil outer ring tail end is the negative plate 8 of 100mm～130mm,
Step 5: the installation of anode ear 10: make in step 3 to apply welding anode ear 10 on the centre position of positive plate 6 inner ring positive electrode active material layers 13 of positive active material, on the position of the positive electrode active material layer 13 of anode ear 10 bottoms, it is anodal exit, at anodal exit, the head end of positive plate 6 and positive plate 6 tail ends are near on the position of positive electrode active material layer 13, and it is 10mm～30mm high temperature gummed tape 15 that width is posted respectively in its inner ring and outer ring;
Step 6: the installation of negative electrode lug: head end welding the first negative electrode lug 12 that makes negative plate 8 inner rings of coating negative electrode active material in step 4, the corresponding position of negative plate 8 of the first negative electrode lug 12 bottoms is negative pole the first exit, welding the second negative electrode lug 11 on the close position of negative electrode active material layer 14 of negative plate 8 inner ring tail ends, the corresponding position of negative plate 8 of the second negative electrode lug 11 bottoms is negative pole the second exit, and negative pole the second exit posts respectively width on the corresponding position of negative plate 8 inner rings and outer ring be 10mm～30mm high temperature gummed tape 15;
Step 7: prepare lithium-ion electric core 2: pass through respectively vacuum drying oven by installing the negative plate 8 that installs negative electrode lug in the positive plate 6 of anode ear and step 6 in step 5, under 80 ℃～120 ℃ environment, dry 8h～12h, then according to positive plate 6, the first barrier film 7, the order of negative plate 8 and the second barrier film 9 rear coiling that superposes successively, by the sutomatic winding machine that the volume pin is 2.5mm～4mm, reel, positive plate 6 and negative plate 8 reeled and finished get final product, the external diameter of the lithium-ion electric core 2 afterwards of reeling and nickel plating box hat 1 interior through than being 95%～100% for the internal diameter ratio:
Step 8: install insulating trip 3 and lower insulating trip 4: anode ear 10 is arranged on the top of the lithium-ion electric core 2 in step 7, the first negative electrode lug 12 and the second negative electrode lug 11 are arranged on the bottom of the lithium-ion electric core 2 in step 7, make anode ear 10 pass insulating trip 3, and upper insulating trip 3 is connected with the top of lithium-ion electric core 2, make the first negative electrode lug 12 and the second negative electrode lug 11 pass lower insulating trip 4, and lower insulating trip 4 is connected with the bottom of lithium-ion electric core 2, the first negative electrode lug 12 and the second negative electrode lug 11 are by the center of lithium-ion electric core 2;
Step 9: weldering basic skill or training order: the lithium-ion electric core 2 of installing insulating trip 3 and lower insulating trip 4 in step 8 is put into to nickel plating box hat 1, and by the bottom of the first negative electrode lug 12 and the second negative electrode lug 11 welding and nickel plating box hat 1, the disconnection pulling force after its welding is greater than 10N;
Step 10: slot rolling operation: the oral area that welds the nickel plating box hat 1 after basic skill or training's order in step 9 is carried out to the slot rolling processing;
Step 11: baking operation: the inside lithium-ion electric core 2 that carries out the rear nickel plating box hat 1 of slot rolling processing in step 10 is dried, use the vacuum bakeout case in the temperature environment of 75 ℃～85 ℃, dry 24h～60h;
Step 12: inject the electrolyte operation: inject the electrolyte into the nickel plating box hat inside after completing steps 11 baking operations, this column type high-multiplying-power battery is the nickle cobalt lithium manganate battery that small-sized capacity is no more than 3000mAh, and the injection rate of its electrolyte is 3g/Ah～5g/Ah;
Step 13: sealing process: the nickel plating box hat 1 injected in step 12 after the electrolyte operation seal to processings, and block 5 is installed at the top that is about to nickel plating box hat 1, and make to block a shot 5 and anode ear 10 weld;
Step 14: forming and capacity dividing operation: will carry out column type high-multiplying-power battery after sealing process in step 13 at first with 0.02C～0.05C current charges 4h, then with 0.1C～0.2C current charges 6h, finally with the 0.5C electric current, charge and discharge 2 times, record last discharge capacity, be greater than the design nominal capacity be qualified, finished product.
Binding agent in described step 1 and step 2 is selected from the mixture of this rubber of fourth of 1%～2% sodium carboxymethylcellulose and 2%～3%, polyvinylidene fluoride, a kind of in water-base cement.The first barrier film 7 in described step 7 and the second barrier film 9 are selected from three layers of composite diaphragm of polypropylene, polyethylene/polypropylene, a kind of in single-layer polypropylene barrier film or monolayer polyethylene barrier film, wherein, the thickness of the first barrier film 7 and the second barrier film 9 is 8 μ m～25 μ m, its porosity 30%～45%.Described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding one or both mixture of 1%～4% biphenyl or 1%～4% cyclohexyl benzene.Described anode ear 10 is 26mm～72mm for length, and wide is 4mm～6mm, and thick is the aluminium pole ears of 0.10mm～0.15mm, and described the first negative electrode lug 12 and the second negative electrode lug 11 are 26mm～70mm for length, and wide is 3mm～4mm, and thick is the copper polar ear of 0.06mm～0.10mm.The material of the first barrier film 7 and the second barrier film 9 must be consistent when selecting.
A kind of preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery, comprise the steps:
Step 1: prepare positive active material: comprise that following mixed raw material according to parts by weight becomes: 2 parts of polyvinylidene fluoride, 93 parts of nickle cobalt lithium manganates, 3 parts of conductive blacks, 2 parts of electrically conductive graphites and 55 parts of 1-METHYLPYRROLIDONEs;
Step 2: prepare negative electrode active material: comprise that following mixed raw material according to parts by weight becomes: 93 parts of graphite, 3 parts of conductive blacks, 4 parts of binding agents and 120 parts of deionized waters; Described binding agent is: the mixture of 1%～2% sodium carboxymethylcellulose and this rubber of fourth of 2%～3%, and wherein, 1%～2% sodium carboxymethylcellulose is 1.5 parts, this rubber of fourth of 2%～3% is 2.5 parts.
Step 3: the preparation of positive plate 6: the positive active material prepared in step 1 is coated to respectively on the surface of the inner ring of aluminium foil and outer ring, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 6min, the positive active material tail end on inner peripheral surface and surface, outer ring is the positive plate 6 of 60mm with the distance of aluminium foil inner peripheral surface and surface, outer ring tail end respectively;
Step 4: the preparation of negative plate 8: the negative electrode active material prepared in step 2 is applied respectively on the inner peripheral surface and surface, outer ring of Copper Foil, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 4min, the negative electrode active material layer 14 of inner peripheral surface is 25mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 65mm, the negative electrode active material layer 14 of outer ring be 25mm with the distance of Copper Foil outer ring head end, itself and Copper Foil outer ring tail end apart from being the negative plate 8 of 115mm;
Step 5: the installation of anode ear 10: make in step 3 to apply welding anode ear 10 on the centre position of positive plate 6 inner ring positive electrode active material layers 13 of positive active material, on the position of the positive electrode active material layer 13 of anode ear 10 bottoms, it is anodal exit, at anodal exit, the head end of positive plate 6 and positive plate 6 tail ends are near on the position of positive electrode active material layer 13, and it is 10mm high temperature gummed tape 15 that width is posted respectively in its inner ring and outer ring;
Step 6: the installation of negative electrode lug: head end welding the first negative electrode lug 12 that makes negative plate 8 inner rings of coating negative electrode active material in step 4, the corresponding position of negative plate 8 of the first negative electrode lug 12 bottoms is negative pole the first exit, welding the second negative electrode lug 11 on the close position of negative electrode active material layer 14 of negative plate 8 inner ring tail ends, the corresponding position of negative plate 8 of the second negative electrode lug 11 bottoms is negative pole the second exit, and negative pole the second exit posts respectively width on the corresponding position of negative plate 8 inner rings and outer ring be 15mm high temperature gummed tape 15;
Step 7: prepare lithium-ion electric core 2: pass through respectively vacuum drying oven by installing the negative plate 8 that installs negative electrode lug in the positive plate 6 of anode ear and step 6 in step 5, under 100 ℃ of environment, dry 8h, then according to positive plate 6, the first barrier film 7, the order of negative plate 8 and the second barrier film 9 rear coiling that superposes successively, by the sutomatic winding machine that the volume pin is 2.5mm, reel, positive plate 6 and negative plate 8 are reeled and are finished to get final product, and after reeling, the external diameter of lithium-ion electric core 2 is 98% with the internal diameter ratio of nickel plating box hat 1.
Step 8: install insulating trip 3 and lower insulating trip 4: anode ear 10 is arranged on the top of the lithium-ion electric core 2 in step 7, the first negative electrode lug 12 and the second negative electrode lug 11 are arranged on the bottom of the lithium-ion electric core 2 in step 7, make anode ear 10 pass insulating trip 3, and upper insulating trip 3 is connected with the top of lithium-ion electric core 2, make the first negative electrode lug 12 and the second negative electrode lug 11 pass lower insulating trip 4, and lower insulating trip 4 is connected with the bottom of lithium-ion electric core 2, the first negative electrode lug 12 and the second negative electrode lug 11 are by the center of lithium-ion electric core 2;
Step 9: weldering basic skill or training order: the lithium-ion electric core 2 of installing insulating trip 3 and lower insulating trip 4 in step 8 is put into to nickel plating box hat 1, and by the bottom of the first negative electrode lug 12 and the second negative electrode lug 11 welding and nickel plating box hat 1, the disconnection pulling force after its welding is greater than 10N;
Step 10: slot rolling operation: the oral area that welds the nickel plating box hat 1 after basic skill or training's order in step 9 is carried out to the slot rolling processing;
Step 11: baking operation: the inside lithium-ion electric core 2 that carries out the rear nickel plating box hat 1 of slot rolling processing in step 10 is dried, use the vacuum bakeout case in the temperature environment of 80 ℃, dry 60h;
Step 12: inject the electrolyte operation: inject the electrolyte into the inside of nickel plating box hat 1, the nickle cobalt lithium manganate battery that this column type high-multiplying-power battery is nominal capacity 1500mAh, the injection rate of its electrolyte is 6g;
Step 13: sealing process: the nickel plating box hat 1 injected in step 10 after the electrolyte operation seal to processings, and block 5 is installed at the top that is about to nickel plating box hat 1, and make to block a shot 5 and anode ear 10 weld;
Step 14: forming and capacity dividing operation: will carry out column type high-multiplying-power battery after sealing process in step 11 at first with 0.02C current charges 4h, then with 0.2C current charges 6h, finally with the 0.5C electric current, charge and discharge 2 times, record last discharge capacity, it is qualified that capacity is greater than nominal capacity 1500mAh, finished product.
The binding agent of described step 1 is polyvinylidene fluoride, and the binding agent in step 2 is the mixture of this rubber of fourth of 1%～2% sodium carboxymethylcellulose and 2%～3%.The first barrier film 7 in described step 7 and the second barrier film 9 are three layers of composite diaphragm of polypropylene, polyethylene/polypropylene, and its thickness is 25 μ m, its porosity 42%; Described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding 2% biphenyl, described anode ear 10 is 72mm for length, and wide is 6mm, and thick is the aluminium pole ears of 0.15mm, and described the first negative electrode lug 12 and the second negative electrode lug 11 are the long 26mm that is, wide is 4mm, and thick is the copper polar ear of 0.10mm.
A kind of preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery, comprise the steps:
Step 1: prepare positive active material: comprise that following mixed raw material according to parts by weight becomes: 1 part of binding agent, 92 parts of nickle cobalt lithium manganates, 1 part of conductive black, 1 part of electrically conductive graphite and 33 parts of 1-METHYLPYRROLIDONEs;
Step 2: prepare negative electrode active material: comprise that following mixed raw material according to parts by weight becomes: 92 parts of graphite, 1 part of conductive black, 3 parts of binding agents and 100 parts of deionized waters;
Step 3: the preparation of positive plate 6: the positive active material prepared in step 1 is coated to respectively on the surface of the inner ring of aluminium foil and outer ring, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min, the positive active material tail end on inner peripheral surface and surface, outer ring is the positive plate 6 of 45mm with the distance of aluminium foil inner peripheral surface and surface, outer ring tail end respectively;
Step 4: the preparation of negative plate 8: the negative electrode active material prepared in step 2 is applied respectively on the inner peripheral surface and surface, outer ring of Copper Foil, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min, the negative electrode active material layer 14 of inner peripheral surface is 15mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 50mm, the negative electrode active material layer 14 of outer ring be 15mm with the distance of Copper Foil outer ring head end, itself and Copper Foil outer ring tail end apart from being the negative plate 8 of 100mm;
Step 5: the installation of anode ear 10: make in step 3 to apply welding anode ear 10 on the centre position of positive plate 6 inner ring positive electrode active material layers 13 of positive active material, on the position of the positive electrode active material layer 13 of anode ear 10 bottoms, it is anodal exit, at anodal exit, the head end of positive plate 6 and positive plate 6 tail ends are near on the position of positive electrode active material layer 13, and it is 10mm high temperature gummed tape 15 that width is posted respectively in its inner ring and outer ring;
Step 6: the installation of negative electrode lug: head end welding the first negative electrode lug 12 that makes negative plate 8 inner rings of coating negative electrode active material in step 4, the corresponding position of negative plate 8 of the first negative electrode lug 12 bottoms is negative pole the first exit, welding the second negative electrode lug 11 on the close position of negative electrode active material layer 14 of negative plate 8 inner ring tail ends, the corresponding position of negative plate 8 of the second negative electrode lug 11 bottoms is negative pole the second exit, and negative pole the second exit posts respectively width on the corresponding position of negative plate 8 inner rings and outer ring be 10mm high temperature gummed tape 15;
Step 7: prepare lithium-ion electric core 2: pass through respectively vacuum drying oven by installing the negative plate 8 that installs negative electrode lug in the positive plate 6 of anode ear and step 6 in step 5, under 80 ℃ of environment, dry 8h, then according to positive plate 6, the first barrier film 7, the order of negative plate 8 and the second barrier film 9 rear coiling that superposes successively, by the sutomatic winding machine that the volume pin is 2.5mm, reel, positive plate 6 and negative plate 8 are reeled and are finished to get final product, and after reeling, the external diameter of lithium-ion electric core 2 is 95% with the internal diameter ratio of nickel plating box hat 1;
Step 8: install insulating trip 3 and lower insulating trip 4: anode ear 10 is arranged on the top of the lithium-ion electric core 2 in step 7, the first negative electrode lug 12 and the second negative electrode lug 11 are arranged on the bottom of the lithium-ion electric core 2 in step 7, make anode ear 10 pass insulating trip 3, and upper insulating trip 3 is connected with the top of lithium-ion electric core 2, make the first negative electrode lug 12 and the second negative electrode lug 11 pass lower insulating trip 4, and lower insulating trip 4 is connected with the bottom of lithium-ion electric core 2, the first negative electrode lug 12 and the second negative electrode lug 11 are by the center of lithium-ion electric core 2;
Step 9: weldering basic skill or training order: the lithium-ion electric core 2 of installing insulating trip 3 and lower insulating trip 4 in step 8 is put into to nickel plating box hat 1, and by the bottom of the first negative electrode lug 12 and the second negative electrode lug 11 welding and nickel plating box hat 1, the disconnection pulling force after its welding is greater than 10N;
Step 10: slot rolling operation: the oral area that welds the nickel plating box hat 1 after basic skill or training's order in step 9 is carried out to the slot rolling processing;
Step 11: baking operation: the inside lithium-ion electric core 2 that carries out the rear nickel plating box hat 1 of slot rolling processing in step 10 is dried, use the vacuum bakeout case in the temperature environment of 75 ℃, dry 24h;
Step 12: inject the electrolyte operation: inject the electrolyte into nickel plating box hat 1 inside after completing steps 11 baking operations, the nickle cobalt lithium manganate battery that this column type high-multiplying-power battery is nominal capacity 850mAh, the injection rate of its electrolyte is 2.6g;
Step 13: sealing process: the nickel plating box hat 1 injected in step 12 after the electrolyte operation seal to processings, and block 5 is installed at the top that is about to nickel plating box hat 1, and make to block a shot 5 and anode ear 10 weld;
Step 14: forming and capacity dividing operation: will carry out column type high-multiplying-power battery after sealing process in step 13 at first with 0.02C current charges 4h, then with 0.1C current charges 6h, finally with the 0.5C electric current, charge and discharge 2 times, record last discharge capacity, it is qualified that capacity is greater than nominal capacity 850mAh, finished product.
The binding agent of described step 1 is water-base cement, and the binding agent in described step 2 is polyvinylidene fluoride, and the first barrier film 7 in described step 7 is and the second barrier film 9 is the monolayer polyethylene barrier film, and thickness is 8 μ m, its porosity 30%; Described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding the mixture of 1% biphenyl and person's 1% cyclohexyl benzene.Described anode ear 10 is 26mm for length, and wide is 4mm, and thick is the aluminium pole ears of 0.10mm, and described the first negative electrode lug 12 and the second negative electrode lug 11 are 26mm for length, and wide is 3mm, and thick is the copper polar ear of 0.06mm.
A kind of preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery, comprise the steps:
Step 1: prepare positive active material: comprise that following mixed raw material according to parts by weight becomes: 2 parts of binding agents, 93.5 parts of nickle cobalt lithium manganates, 2 parts of conductive blacks, 2 parts of electrically conductive graphites and 57.5 parts of 1-METHYLPYRROLIDONEs;
Step 2: prepare negative electrode active material: comprise that following mixed raw material according to parts by weight becomes: 93.5 parts of graphite, 2 parts of conductive blacks, 4 parts of binding agents and 125 parts of deionized waters;
Step 3: the preparation of positive plate 6: the positive active material prepared in step 1 is coated to respectively on the surface of the inner ring of aluminium foil and outer ring, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 5min, the positive active material tail end on inner peripheral surface and surface, outer ring is the positive plate 6 of 65mm with the distance of aluminium foil inner peripheral surface and surface, outer ring tail end respectively;
Step 4: the preparation of negative plate 8: the negative electrode active material prepared in step 2 is applied respectively on the inner peripheral surface and surface, outer ring of Copper Foil, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 5min, the negative electrode active material layer 14 of inner peripheral surface is 27.5mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 65mm, the negative electrode active material layer 14 of outer ring be 27.5mm with the distance of Copper Foil outer ring head end, itself and Copper Foil outer ring tail end apart from being the negative plate 8 of 115mm;
Step 5: the installation of anode ear 10: make in step 3 to apply welding anode ear 10 on the centre position of positive plate 6 inner ring positive electrode active material layers 13 of positive active material, on the position of the positive electrode active material layer 13 of anode ear 10 bottoms, it is anodal exit, at anodal exit, at anodal exit, the head end of positive plate 6 and positive plate 6 tail ends are near on the position of positive electrode active material layer 13, and it is 20mm high temperature gummed tape 15 that width is posted respectively in its inner ring and outer ring;
Step 6: the installation of negative electrode lug: head end welding the first negative electrode lug 12 that makes negative plate 8 inner rings of coating negative electrode active material in step 4, the corresponding position of negative plate 8 of the first negative electrode lug 12 bottoms is negative pole the first exit, welding the second negative electrode lug 11 on the close position of negative electrode active material layer 14 of negative plate 8 inner ring tail ends, the corresponding position of negative plate 8 of the second negative electrode lug 11 bottoms is negative pole the second exit, and negative pole the second exit posts respectively width on the corresponding position of negative plate 8 inner rings and outer ring be 20mm high temperature gummed tape 15;
Step 7: prepare lithium-ion electric core 2: pass through respectively vacuum drying oven by installing the negative plate 8 that installs negative electrode lug in the positive plate 6 of anode ear and step 6 in step 5, under 100 ℃ of environment, dry 10h, then according to positive plate 6, the first barrier film 7, the order of negative plate 8 and the second barrier film 9 rear coiling that superposes successively, by the sutomatic winding machine that the volume pin is 3mm, reel, while reeling 12 circle, positive plate 6 and negative plate 8 are reeled and are finished to get final product, and after reeling, the external diameter of lithium-ion electric core 2 is 98% with the internal diameter ratio of nickel plating box hat 1;
Step 8: install insulating trip 3 and lower insulating trip 4: anode ear 10 is arranged on the top of the lithium-ion electric core 2 in step 7, the first negative electrode lug 12 and the second negative electrode lug 11 are arranged on the bottom of the lithium-ion electric core 2 in step 7, make anode ear 10 pass insulating trip 3, and upper insulating trip 3 is connected with the top of lithium-ion electric core 2, make the first negative electrode lug 12 and the second negative electrode lug 11 pass lower insulating trip 4, and lower insulating trip 4 is connected with the bottom of lithium-ion electric core 2, the first negative electrode lug 12 and the second negative electrode lug 11 are by the center of lithium-ion electric core 2;
Step 9: weldering basic skill or training order: the lithium-ion electric core 2 of installing insulating trip 3 and lower insulating trip 4 in step 8 is put into to nickel plating box hat 1, and by the bottom of the first negative electrode lug 12 and the second negative electrode lug 11 welding and nickel plating box hat 1, the disconnection pulling force after its welding is greater than 10N;
Step 10: slot rolling operation: the oral area that welds the nickel plating box hat 1 after basic skill or training's order in step 9 is carried out to the slot rolling processing;
Step 11: baking operation: the inside lithium-ion electric core 2 that carries out the rear nickel plating box hat 1 of slot rolling processing in step 10 is dried, use the vacuum bakeout case in the temperature environment of 80 ℃, dry 42h;
Step 12: inject the electrolyte operation: inject the electrolyte into nickel plating box hat 1 inside after completing steps 11 baking operations, the nickle cobalt lithium manganate battery that this column type high-multiplying-power battery is nominal capacity 1300mAh, the injection rate of its electrolyte is 5.2g;
Step 13: sealing process: the nickel plating box hat 1 injected in step 12 after the electrolyte operation seal to processings, and block 5 is installed at the top that is about to nickel plating box hat 1, and make to block a shot 5 and anode ear 10 weld;
Step 14: forming and capacity dividing operation: will carry out column type high-multiplying-power battery after sealing process in step 13 at first with 0.03C current charges 4h, then with 0.2C current charges 6h, finally with the 0.5C electric current, charge and discharge 2 times, record last discharge capacity, it is qualified that capacity is greater than nominal capacity 1300mAh, finished product.
Binding agent in described step 1 is the mixture of this rubber of fourth of 1%～2% sodium carboxymethylcellulose and 2%～3%, the binding agent of step 2 is water-base cement, the first barrier film 7 and the second barrier film 9 in described step 7 are the single-layer polypropylene barrier film, membrane thicknesses is 16 μ m, its porosity 40%; Described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding 3% cyclohexyl benzene.Described anode ear 10 is 49mm for length, and wide is 5mm, and thick is the aluminium pole ears of 0.13mm, and described the first negative electrode lug 12 and the second negative electrode lug 11 are 48mm for length, and wide is 3.5mm, and thick is the copper polar ear of 0.08mm.
A kind of preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery, comprise the steps:
Step 1: prepare positive active material: comprise that following mixed raw material according to parts by weight becomes: 3 parts of binding agents, 95 parts of nickle cobalt lithium manganates, 3 parts of conductive blacks, 3 parts of electrically conductive graphites and 82 parts of 1-METHYLPYRROLIDONEs;
Step 2: prepare negative electrode active material: comprise that following mixed raw material according to parts by weight becomes: 95 parts of graphite, 3 parts of conductive blacks, 5 parts of binding agents and 150 parts of deionized waters;
Step 3: the preparation of positive plate 6: the positive active material prepared in step 1 is coated to respectively on the surface of the inner ring of aluminium foil and outer ring, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 8min, the positive active material tail end on inner peripheral surface and surface, outer ring is the positive plate 6 of 75mm with the distance of aluminium foil inner peripheral surface and surface, outer ring tail end respectively;
Step 4: the preparation of negative plate 8: the negative electrode active material prepared in step 2 is applied respectively on the inner peripheral surface and surface, outer ring of Copper Foil, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 8min, the negative electrode active material layer 14 of inner peripheral surface is 40mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 80mm, the negative electrode active material layer 14 of outer ring be 40mm with the distance of Copper Foil outer ring head end, itself and Copper Foil outer ring tail end apart from being the negative plate 8 of 130mm;
Step 5: the installation of anode ear 10: make in step 3 to apply welding anode ear 10 on the centre position of positive plate 6 inner ring positive electrode active material layers 13 of positive active material, on the position of the positive electrode active material layer 13 of anode ear 10 bottoms, it is anodal exit, the head end of positive plate 6 and positive plate 6 tail ends are near on the position of positive electrode active material layer 13, and it is 30mm high temperature gummed tape 15 that width is posted respectively in its inner ring and outer ring;
Step 6: the installation of negative electrode lug: head end welding the first negative electrode lug 12 that makes negative plate 8 inner rings of coating negative electrode active material in step 4, the corresponding position of negative plate 8 of the first negative electrode lug 12 bottoms is negative pole the first exit, welding the second negative electrode lug 11 on the close position of negative electrode active material layer 14 of negative plate 8 inner ring tail ends, the corresponding position of negative plate 8 of the second negative electrode lug 11 bottoms is negative pole the second exit, and negative pole the second exit posts respectively width on the corresponding position of negative plate 8 inner rings and outer ring be 30mm high temperature gummed tape 15;
Step 7: prepare lithium-ion electric core 2: pass through respectively vacuum drying oven by installing the negative plate 8 that installs negative electrode lug in the positive plate 6 of anode ear and step 6 in step 5, under 120 ℃ of environment, dry 12h, then according to positive plate 6, the first barrier film 7, the order of negative plate 8 and the second barrier film 9 rear coiling that superposes successively, by the sutomatic winding machine that the volume pin is 4mm, reel, while reeling 12 circle, positive plate 6 and negative plate 8 are reeled and are finished to get final product, and after reeling, the external diameter of lithium-ion electric core 2 is 100% with the internal diameter ratio of nickel plating box hat 1;
Step 8: install insulating trip 3 and lower insulating trip 4: anode ear 10 is arranged on the top of the lithium-ion electric core 2 in step 7, the first negative electrode lug 12 and the second negative electrode lug 11 are arranged on the bottom of the lithium-ion electric core 2 in step 7, make anode ear 10 pass insulating trip 3, and upper insulating trip (3) is connected with the top of lithium-ion electric core 2, make the first negative electrode lug 12 and the second negative electrode lug 11 pass lower insulating trip 4, and lower insulating trip 4 is connected with the bottom of lithium-ion electric core 2, the first negative electrode lug 12 and the second negative electrode lug 11 are by the center of lithium-ion electric core 2;
Step 9: weldering basic skill or training order: the lithium-ion electric core 2 of installing insulating trip 3 and lower insulating trip 4 in step 8 is put into to nickel plating box hat 1, and by the bottom of the first negative electrode lug 12 and the second negative electrode lug 11 welding and nickel plating box hat 1, the disconnection pulling force after its welding is greater than 10N;
Step 10: slot rolling operation: the oral area that welds the nickel plating box hat 1 after basic skill or training's order in step 9 is carried out to the slot rolling processing;
Step 11: baking operation: the inside lithium-ion electric core 2 that carries out the rear nickel plating box hat 1 of slot rolling processing in step 10 is dried, use the vacuum bakeout case in the temperature environment of 85 ℃, dry 60h;
Step 12: inject the electrolyte operation: inject the electrolyte into nickel plating box hat 1 inside after completing steps 11 baking operations, the nickle cobalt lithium manganate battery that this column type high-multiplying-power battery is nominal capacity 2800mAh, the injection rate of its electrolyte is 16.8g;
Step 13: sealing process: the nickel plating box hat 1 injected in step 12 after the electrolyte operation seal to processings, and block 5 is installed at the top that is about to nickel plating box hat 1, and make to block a shot 5 and anode ear 10 weld;
Step 14: forming and capacity dividing operation: will carry out column type high-multiplying-power battery after sealing process in step 13 at first with 0.05C current charges 4h, then with 0.2C current charges 6h, finally with the 0.5C electric current, charge and discharge 2 times, record last discharge capacity, it is qualified that capacity is greater than nominal capacity 2800mAh, finished product.
Described step 1 binding agent is polyvinylidene fluoride, binding agent in described step 2 is water-base cement, the first barrier film 7 in described step 7 and the second barrier film 9 are three layers of composite diaphragm of polypropylene, polyethylene/polypropylene, thickness is 25 μ m, its porosity 45%, described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding the mixture of 4% biphenyl and 4% cyclohexyl benzene.Described anode ear 10 is 72mm for length, and wide is 6mm, and thick is the aluminium pole ears of 0.15mm, and described the first negative electrode lug 12 and the second negative electrode lug 11 are 70mm for length, and wide is 4mm, and thick is the copper polar ear of 0.10mm.
With embodiment 4, compare, its difference is: described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding 1% biphenyl.
With embodiment 1, compare, its difference is: described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding 4% biphenyl.
Embodiment 7
With embodiment 1, compare, its difference is: described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding the mixture of 4% cyclohexyl benzene.
With embodiment 2, compare, its difference is: described electrolyte is EC, EMC, DMC, and solute is LiPF
6For in basic organic electrolyte, adding the mixture of 2% biphenyl and 3% cyclohexyl benzene.
With embodiment 1, compare, its difference is: the first barrier film 7 and the second barrier film 9 are the single-layer polypropylene barrier film, and thickness is 25 μ m, its porosity 45%.
With embodiment 1, compare, its difference is: the first barrier film 7 and the second barrier film 9 are the monolayer polyethylene barrier film, and thickness is 25 μ m, its porosity 45%.
Experimental example 1
With embodiment 1, compare, its difference is: described electrolyte is EC, EMC, DMC, and solute is LiPF
6
Experimental example 2
As shown in Figure 3, with the difference of embodiment 1, be: the head end of positive plate 6 and positive plate 6 tail ends are not pasted high temperature gummed tape 15; The positive active material tail end on positive plate 6 inner peripheral surface and surface, outer ring is concordant with surface, outer ring tail end with the aluminium foil inner peripheral surface respectively; Head end welding first negative electrode lug 12 of negative plate 8 inner rings, at negative plate 8 inner ring tail end welding the second negative electrode lugs 11, negative plate 8 inner peripheral surface are not all pasted high temperature gummed tape 15 mutually with the surface, outer ring; The negative electrode active material layer 14 of inner peripheral surface is 25mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 5mm, the negative electrode active material layer 14 of outer ring be 25mm with the distance of Copper Foil outer ring head end, itself and Copper Foil outer ring tail end apart from being 55mm;
Experimental example 3
With the difference of experimental example 2, be: the first barrier film 7 and the second barrier film 9 are the single-layer polypropylene barrier film, and thickness is 25 μ m, its porosity 45%.
Experimental example 4
With the difference of experimental example 2, be: the first barrier film 7 and the second barrier film 9 are the monolayer polyethylene barrier film, and thickness is 25 μ m, its porosity 45%.
Experimental example 5
With experimental example 2, compare, its difference is: described electrolyte is EC, EMC, DMC, and solute is LiPF
6
Experiment content comprise to the battery after forming and capacity dividing overcharge, the security performance test of short circuit, impact, acupuncture.
Experimental technique:
Standard charging: 1 standard atmospheric pressure, 25 ℃ ± 2 ℃ of ambient temperatures, relative humidity are under 45%～80% condition, with 1C
5The A charging, when battery terminal voltage reaches charging deboost 4.2V, change constant voltage charge into, until charging current is less than or equal to 0.01C
5After A, stop charging
Overcharge test: after the battery standard charging, measure the initial condition of battery, to 10.0V, then turn constant voltage charge to when electric current 0.01C5A, stopping with the 3C5A current charges, recording process temperature, the end-state of measurement battery.Battery should be not on fire, do not explode, surface temperature is less than 150 ℃
Short-circuit test: after the battery standard charging, the line that is no more than 50m Ω with the external circuit internal resistance directly is connected anode and cathode terminals.Should test 24h or reduce by 20% to skin temperature from maximum temperature, battery should be not on fire, do not explode, surface temperature is less than 150 ℃
Shock-testing: after the battery standard charging, measure the initial condition of battery, put in the plane, and be connected with thermocouple, the rod that is 15.8mm by a diameter is placed on cell height direction centre position, allow the weight of weight 9.1kg highly freely vertically drop down onto the impact table top from 610mm, observe battery outward appearance and variations in temperature, battery should be not on fire, do not explode, surface temperature is less than 150 ℃
Lancing test: after the battery standard charging, measure the initial condition of battery, be placed on bearing, and be connected with thermocouple, then with diameter, be the quick and complete battery that pierces through in position of draw point in the middle of the short transverse of battery of 3mm, observe battery outward appearance and temperature, battery should be not on fire, do not explode, surface temperature is less than 150 ℃.
Test result is in Table 1, and the battery of every group every test is 20.
The security performance test result of embodiment 1～10 and experimental example 1～5:
From above-mentioned data, can find out:
Use one or both mixture of positive plate 6 of the present invention and negative plate 8 respective outer side edges 1%～4% biphenyl or 1%～4% cyclohexyl benzene to be the battery of the electrolyte of additive, pass through by 3 kinds of diaphragm cell security performances equal 100%.And with the battery of said structure of the present invention or form or security performance test failure items more or less all.
Claims (10)
1. nickle cobalt lithium manganate column type high-multiplying-power battery, it is characterized in that: this column type high-multiplying-power battery comprises nickel plating box hat (1), with the lithium-ion electric core (2) that is located at nickel plating box hat (1) inside, the upper and lower of lithium-ion electric core (2) is respectively equipped with insulating trip (3) and lower insulating trip (4), and the machinery sealing on nickel plating box hat (1) top is provided with block (5), described lithium-ion electric core (2) comprises the stacked and positive plate (6) of reeling successively, the first barrier film (7), negative plate (8) and the second barrier film (9), described positive plate (6) comprises aluminium foil, on the inner peripheral surface of described aluminium foil and surface, outer ring, be respectively equipped with positive electrode active material layer (13), described inner ring and outer ring positive electrode active material layer (13) tail end are 45mm～75mm with the distance of aluminium foil inner ring and outer ring tail end respectively, the centre position of aluminium foil inner ring positive electrode active material layer (13) is provided with anodal exit, anodal exit top is provided with anode ear (10), described negative plate (8) comprises Copper Foil, on the inner ring of described Copper Foil and the surface of outer ring, be respectively equipped with negative electrode active material layer (14), the negative electrode active material layer of inner ring (14) is 15mm～40mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 50mm～80mm, the negative electrode active material layer of outer ring (14) is 15mm～40mm with the distance of Copper Foil outer ring head end, the distance of itself and Copper Foil outer ring tail end is 100mm～130mm, Copper Foil inner ring head end is provided with negative pole the first exit, negative pole the first exit top is provided with the first negative electrode lug (12), Copper Foil inner ring tail end is provided with negative pole the second exit near the position of negative electrode active material layer (14), negative pole the second exit top is provided with the second negative electrode lug (11), described anode ear (10) passes insulating trip (3) and is connected with block (5), described the first negative electrode lug (12) passes respectively lower insulating trip (4) with the second negative electrode lug (11) and is connected with the bottom of nickel plating box hat (1).
2. nickle cobalt lithium manganate column type high-multiplying-power battery according to claim 1, it is characterized in that: the material of described anode ear (10) is aluminium, the material of the first negative electrode lug (12) and the second negative electrode lug (11) is copper.
3. nickle cobalt lithium manganate column type high-multiplying-power battery according to claim 1, it is characterized in that: the head end of described positive plate (6), the anodal exit of positive plate (6) and positive plate (6) tail end, near the position of positive electrode active material layer (13), are respectively equipped with high temperature gummed tape (15) on its inner ring and surface, outer ring.
4. nickle cobalt lithium manganate column type high-multiplying-power battery according to claim 1, is characterized in that: on the Internal and external cycle position of described Copper Foil negative pole the second exit, be respectively equipped with high temperature gummed tape (15).
5. according to the described nickle cobalt lithium manganate column type of claim 3 or 4 high-multiplying-power battery, it is characterized in that: the width of described high temperature gummed tape (15) is 10mm～30mm.
6. the preparation method of a nickle cobalt lithium manganate column type high-multiplying-power battery, it is characterized in that: this preparation method comprises the steps:
Step 1: prepare positive active material: comprise that following mixed raw material according to parts by weight becomes: 1 part～3 parts binding agents, 92 parts～95 parts nickle cobalt lithium manganates, 1 part～3 parts conductive blacks, 1 part～3 parts electrically conductive graphites and 33 parts～82 parts 1-METHYLPYRROLIDONEs;
Step 2: prepare negative electrode active material: comprise that following mixed raw material according to parts by weight becomes: 92 parts～95 parts graphite, 1 part～3 parts conductive blacks, 3 parts～5 parts binding agents and 100 parts～150 parts deionized waters;
Step 3: the preparation of positive plate: the positive active material prepared in step 1 is coated to respectively on the surface of the inner ring of aluminium foil and outer ring, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min～8min, the positive active material tail end on inner peripheral surface and surface, outer ring is the positive plate (6) of 45mm～75mm with the distance of aluminium foil inner peripheral surface and surface, outer ring tail end respectively;
Step 4: the preparation of negative plate: the negative electrode active material prepared in step 2 is applied respectively on the inner peripheral surface and surface, outer ring of Copper Foil, then place it in tunnel oven, at the temperature of 70 ℃～130 ℃, dry 2min～8min, the negative electrode active material layer of inner peripheral surface (14) is 15mm～40mm with the distance of Copper Foil inner ring head end, the distance of itself and Copper Foil inner ring tail end is 50mm～80mm, the negative electrode active material layer of outer ring (14) is 15mm～40mm with the distance of Copper Foil outer ring head end, the distance of itself and Copper Foil outer ring tail end is the negative plate (8) of 100mm～130mm,
Step 5: the installation of anode ear: make in step 3 to apply on the centre position of positive plate (6) inner ring positive electrode active material layer (13) of positive active material and weld anode ear (10), on the position of the positive electrode active material layer (13) of anode ear (10) bottom, it is anodal exit, at anodal exit, the head end of positive plate (6) and positive plate (6) tail end are near on the position of positive electrode active material layer (13), and it is 10mm～30mm high temperature gummed tape (15) that width is posted respectively in its inner ring and outer ring;
Step 6: the installation of negative electrode lug: head end welding the first negative electrode lug (12) that makes negative plate (8) inner ring of coating negative electrode active material in step 4, the corresponding position of the negative plate (8) of the first negative electrode lug (12) bottom is negative pole the first exit, welding the second negative electrode lug (11) on the close position of negative electrode active material layer (14) of negative plate (8) inner ring tail end, the corresponding position of the negative plate (8) of the second negative electrode lug (11) bottom is negative pole the second exit, negative pole the second exit posts respectively width on the corresponding position of negative plate (8) inner ring and outer ring be 10mm～30mm high temperature gummed tape (15),
Step 7: prepare lithium-ion electric core (2): pass through respectively vacuum drying oven by installing the negative plate (8) that installs negative electrode lug in the positive plate (6) of anode ear and step 6 in step 5, under 80 ℃～120 ℃ environment, dry 8h～12h, then according to positive plate (6), the first barrier film (7), the order of negative plate (8) and the second barrier film (9) the rear coiling that superposes successively, by the sutomatic winding machine that the volume pin is 2.5mm～4mm, reel, positive plate (6) and negative plate (8) are reeled and are finished to get final product, after reeling, the external diameter of lithium-ion electric core (2) and the internal diameter ratio of nickel plating box hat (1) are 95%～100%,
Step 8: install insulating trip (3) and lower insulating trip (4): anode ear (10) is arranged on the top of the lithium-ion electric core (2) in step 7, the first negative electrode lug (12) and the second negative electrode lug (11) are arranged on the bottom of the lithium-ion electric core (2) in step 7, make anode ear (10) pass insulating trip (3), and upper insulating trip (3) is connected with the top of lithium-ion electric core (2), make the first negative electrode lug (12) and the second negative electrode lug (11) pass lower insulating trip (4), and lower insulating trip (4) is connected with the bottom of lithium-ion electric core (2), the first negative electrode lug (12) and the second negative electrode lug (11) are by the center of lithium-ion electric core (2),
Step 9: weldering basic skill or training order: the lithium-ion electric core (2) of installing insulating trip (3) and lower insulating trip (4) in step 8 is put into to nickel plating box hat (1), by the bottom of the first negative electrode lug (12) and the second negative electrode lug (11) welding and nickel plating box hat (1), the disconnection pulling force after its welding is greater than 10N;
Step 10: slot rolling operation: the oral area that welds the nickel plating box hat (1) after basic skill or training's order in step 9 is carried out to the slot rolling processing;
Step 11: baking operation: the inside lithium-ion electric core (2) that carries out the rear nickel plating box hat (1) of slot rolling processing in step 10 is dried, use the vacuum bakeout case in the temperature environment of 75 ℃～85 ℃, dry 24h～60h;
Step 12: inject the electrolyte operation: inject the electrolyte into nickel plating box hat (1) inside after completing steps 11 baking operations, this column type high-multiplying-power battery is the nickle cobalt lithium manganate battery that small-sized capacity is no more than 3000mAh, and the injection rate of its electrolyte is 3g/Ah～5g/Ah;
Step 13: sealing process: the nickel plating box hat (1) after injection electrolyte operation in step 12 is sealed to processing, block (5) is installed at the top that is about to nickel plating box hat (1), and makes block (5) and anode ear (10) welding;
Step 14: forming and capacity dividing operation: will carry out column type high-multiplying-power battery after sealing process in step 13 at first with 0.02C～0.05C current charges 4h, then with 0.1C～0.2C current charges 6h, finally with the 0.5C electric current, charge and discharge 2 times, record last discharge capacity, be greater than the design nominal capacity be qualified, finished product.
7. the preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery according to claim 6, it is characterized in that: the binding agent in described step 1 and step 2 is selected from the mixture of this rubber of fourth of 1%～2% sodium carboxymethylcellulose and 2%～3%, polyvinylidene fluoride, a kind of in water-base cement.
8. the preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery according to claim 6, it is characterized in that: the first barrier film (7) in described step 7 and the second barrier film (9) are selected from three layers of composite diaphragm of polypropylene, polyethylene/polypropylene, a kind of in single-layer polypropylene barrier film or monolayer polyethylene barrier film, wherein, the thickness of the first barrier film (7) and the second barrier film (9) is 8 μ m～25 μ m, its porosity 30%～45%.
9. the preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery according to claim 6, it is characterized in that: described electrolyte is EC, EMC, DMC, solute is LiPF
6For in basic organic electrolyte, adding one or both mixture of 1%～4% biphenyl or 1%～4% cyclohexyl benzene.
10. the preparation method of nickle cobalt lithium manganate column type high-multiplying-power battery according to claim 6, it is characterized in that: described anode ear (10) is the long 26mm～72mm of being, wide is 4mm～6mm, thick is the aluminium pole ears of 0.10mm～0.15mm, described the first negative electrode lug (12) and the second negative electrode lug (11) are 26mm～70mm for length, wide is 3mm～4mm, and thick is the copper polar ear of 0.06mm～0.10mm.
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