CN101714624A - Spiral-line multi-pole lug lithium ion battery and method for manufacturing same - Google Patents
Spiral-line multi-pole lug lithium ion battery and method for manufacturing same Download PDFInfo
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- CN101714624A CN101714624A CN200910192367A CN200910192367A CN101714624A CN 101714624 A CN101714624 A CN 101714624A CN 200910192367 A CN200910192367 A CN 200910192367A CN 200910192367 A CN200910192367 A CN 200910192367A CN 101714624 A CN101714624 A CN 101714624A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention provides a spiral-line multi-pole lug lithium ion battery and a method for manufacturing the same, and belongs to the field of batteries. The spiral-line multi-pole lug lithium ion battery comprises an anode sheet, a cathode sheet and a membrane arranged between the anode sheet and the cathode sheet, wherein mixed paste made of an active substance is coated on a current collector; a blank position is reserved on a front side of one edge in a length direction of the anode sheet, and a blank position is reserved on a back side of one edge in the length direction of the anode sheet; the rest parts are coated with the paste; the mixed paste made of the active substance is coated on the current collector; a blank position is reserved on the front side of one edge in the length direction of the cathode sheet, and a blank position is reserved on the back side of one edge in the length direction of the cathode sheet; and the rest parts are coated with the paste. The spiral-line multi-pole lug lithium ion battery is characterized in that: pole lugs are arranged at intervals on the reserved blank position of the anode sheet; and the pole lugs are arranged at intervals on the reserved blank position of the cathode sheet. The distance between a pole sheet and an electrode terminal, the internal resistance, and heat generation while discharging are reduced; the safety and the rate of finished products are improved; and the problem that a small battery is not suitable for lamination is solved.
Description
Technical field
A kind of spiral-line multi-pole lug lithium ion battery of the present invention and manufacture method thereof belong to field of batteries, particularly relate to a kind of making that the secondary lithium battery that discharges and recharges of high-rate discharge ability is arranged.
Background technology
Lithium ion battery is since coming out, and the assembling of electric core is the bottleneck that battery is produced in batches always, and the influence to electrical property simultaneously also plays a part crucial.At present, the electric core moulding of lithium ion battery mainly is divided into takeup type and stacked two classes, these two kinds of fit respectively have its pluses and minuses on production and battery performance: coiled advantage is simple in structure, only need 1 positive pole and 1 negative pole, the battery specific energy is big, and its shortcoming is, pole piece is long, the internal resistance of cell is big, is unfavorable for high current charge-discharge, and specific power is little; Stacked advantage is that pole piece is short, and the internal resistance of cell is less relatively, helps high current charge-discharge, its shortcoming is that battery pole piece is many, and side cut is many, is unfavorable for the control of pole piece side cut burr, the generation rim charge is many, and the lamination process need be piled up by the contraposition of a lot of sheet a slice a slice and be formed, and production efficiency is extremely low, has only 1/10th of coiling battery, in addition, the multilayer pole piece is welded with difficulty, special multilayer negative pole, what use is Copper Foil, the Copper Foil good conductivity is unfavorable for electric resistance welding, Copper Foil fusing point height, also be unfavorable for ultrasonic bond, possible rosin joint welds not firmly, also may cross weldering, the weldering of part pole piece is disconnected or the part weldering is disconnected, rosin joint occurs and cross weldering, all can make part negative pole or inoperative, battery is low to be held, more seriously positive pole works and negative pole is inoperative, can in use produce to analyse lithium and security incident occurs.Existing takeup type and stacked lithium battery all respectively have shortcoming, are unfavorable for quick charge and heavy-current discharge.Even positive/negative plate coating is very even, irrational electrode structure and the design of electric core, it is inhomogeneous all can to show electric current distribution when high current charge-discharge, thereby influences the security performance of battery, fill performance and large current density cycle life soon.
The manufacture method of existing multipole ear battery is by behind the pole piece coiling unnecessary paper tinsel material being carried out the die-cut multipole ear that stretches out from electric core two of obtaining, this mode only is suitable for the rectangular cell that two goes out lug, can't realize the making that cylinder multi-pole lug lithium ion battery and same head go out the multi-pole lug lithium ion battery of lug, and multilayer paper tinsel material is carried out die-cut, be difficult to guarantee the integrality of pole piece.
Summary of the invention
The objective of the invention is to avoid the deficiencies in the prior art part, and provide a kind of simple in structure, the battery specific energy is big, the internal resistance of cell is less relatively, help pole piece side cut control, guarantee the integrality of pole piece, the multi-pole lug lithium ion battery of the high-multiplying power discharge that production efficiency is high.
The objective of the invention is to avoid the deficiencies in the prior art part, and provide a kind of simple in structure, the battery specific energy is big, the internal resistance of cell is less relatively, help pole piece side cut control, guarantee the integrality of pole piece, the high-rate discharge ability that production efficiency is high, the part pole piece prevented because the multi-pole lug lithium ion battery manufacture method that failure welding lost efficacy.
The objective of the invention is to reach by following measure, multi-pole ear-lithium ion battery pole slice, active material with make mixing paste after conductive agent, bonding agent fully mix by a certain percentage, be coated on the collector, front, 1 edge at the length direction of pole piece reserves blank position, the back side, 1 edge at the length direction of pole piece reserves blank position, and remainder is coated with full lotion, and many spaced lugs are set on the reservation blank position of pole piece.
Multi-pole lug lithium ion battery, comprise positive plate, negative plate and the barrier film that places therebetween, active material is made mixing paste and is coated on the collector, front, 1 edge at the length direction of positive plate reserves blank position, the back side, 1 edge at the length direction of positive plate reserves blank position, remainder is coated with full lotion, active material is made mixing paste and is coated on the collector, front, 1 edge at the length direction of negative plate reserves blank position, the back side, 1 edge at the length direction of negative plate reserves blank position, remainder is coated with full lotion, the reservation blank position of positive plate is provided with lug at interval, and many spaced lugs are set on the reservation blank position of negative plate.
The multi-pole lug lithium ion battery manufacture method, make positive plate, active material is made mixing paste to be coated on the collector, front, 1 edge at the length direction of positive plate reserves blank position, the back side, 1 edge at the length direction of positive plate reserves blank position, remainder is coated with full lotion, make negative plate, active material is made mixing paste to be coated on the collector, front, 1 edge at the length direction of negative plate reserves blank position, the back side, 1 edge at the length direction of negative plate reserves blank position, remainder is coated with full lotion, adopt the mode of reeling that negative plate is placed on the barrier film, with positive plate, barrier film and negative plate are wound into electric core, fix with the termination adhesive tape, just will weld, the electric core of negative pole carries out the encapsulation of back operation, vacuumize, fluid injection, seal, change into, partial volume, check, obtain battery, many spaced lugs are set on the reservation blank position of positive plate, many spaced lugs are set on the reservation blank position of negative plate.
Lithium ion battery, comprise positive plate, negative plate and place therebetween barrier film, positive and negative plate all comprises collector and electrode substance respectively, conducting salt is dissolved in and constitutes electrolyte in the organic solution, be penetrated into each interlayer of positive plate, negative plate and barrier film, activated batteries, pole piece be by with active material with make mixing paste after conductive agent, bonding agent fully mix by a certain percentage, be coated on the collector by methods such as roller coat, blade coating or sprayings.Make positive plate, with active material with make mixing paste after conductive agent, bonding agent fully mix by a certain percentage, be coated on the collector by methods such as roller coat, blade coating or sprayings, front, 1 edge at the length direction of positive plate reserves blank position, the back side, 1 edge at the length direction of positive plate reserves blank position, be used for the lug welding position, it is blank that a circle is reserved at the anodal back side, and remainder is coated with full lotion.Make negative plate, with active material with make mixing paste after conductive agent, bonding agent fully mix by a certain percentage, be coated on the collector by methods such as roller coat, blade coating or sprayings, front, 1 edge at the length direction of negative plate reserves blank position, the back side, 1 edge at the length direction of negative plate reserves blank position, and remainder is coated with full lotion.Many spaced lugs are set on the reservation blank position of positive plate, lug at interval be by rolling cut, cutting die is die-cut or the laser cutting mode is made.The width of lug can be taken all factors into consideration according to electric core width and overcurrent capability and obtains.Many spaced lugs are set on the reservation blank position of negative plate, lug at interval be by rolling cut, cutting die is die-cut or the laser cutting mode is made.The width of lug can be taken all factors into consideration according to electric core width and overcurrent capability and obtains.Adopt the mode of reeling that negative plate is placed on the barrier film, with barrier film negative plate is wrapped, the blank lug of negative plate stretches out at barrier film one side, behind the volume half-turn positive plate is inserted between volume pin and the barrier film, the blank lug of positive plate also stretches out at the blank lug the same side or the opposite side of negative plate, and positive plate, barrier film and negative plate are wound into electric core, barrier film is around electric core outer ring, fix with the termination adhesive tape, its septation is than the wide 2-3mm of negative pole, and negative pole is than anodal wide 1-2mm; On electric core, there be a blank lug and a blank lug of folding neat positive plate of folding neat negative plate independently to arrange, this is all to have a corresponding lug position to stretch out on each layer pole piece by electric core to form, with of the positive pole welding of positive plate lug with battery, positive pole can be the band glue aluminium pole ears of all thickness, it also can be the block of box hat battery, the shell of aluminum-shell battery, with of the negative pole welding of negative plate lug with battery, negative pole can be the band glue nickel of various sizes, nickel-clad copper, the shell of corronil lug or box hat battery, the block of aluminum-shell battery, just will weld, the electric core of negative pole carries out the encapsulation of back operation, vacuumize, fluid injection, seal, change into, partial volume, check obtains battery.
After the lug at many intervals of the present invention was the lug moulding of same polarity, reeling can be overlapping, had a folded neat lug independently to arrange in the end, and this is to form by all there being a corresponding lug position to stretch out on each layer pole piece.
The lug that the present invention has many intervals of the helix regularity of distribution is to follow following polar equation:
ρ＝aθ+P0
In the formula: a-spiral of Archimedes coefficient, unit is mm/ °, represents increase (or reducing) amount in utmost point footpath when every rotation 1 is spent, i.e. a=L/360;
θ-polar angle, unit is degree, total number of degrees that the expression spiral of Archimedes turns over;
The utmost point footpath of P0-in the time of t=0 °, unit is mm.
L=positive plate thickness+negative plate thickness+2 layer membrane thicknesses, unit is mm.
θ is used for determining the position of lug moulding, and when polar angle θ increased progressively with the integral multiple of π, guaranteeing to reel after the lug moulding of same polarity can be overlapping.
The lug at many intervals of the present invention is by according to the lug forming panel, by rolling cut or cutting die is die-cut or the laser cutting mode is made.The lug forming panel is after becoming electric core by pole piece coiling, mark is made in the lug position of the electric core of winding after, launch pole piece, measure the size of gauge point on the pole piece, obtain the size of multipole ear space on the pole piece, as the lug forming panel.
When the present invention uses square volume pin to reel, the lug position of the square electric core of winding made mark after, launch pole piece, measure the size of gauge point on the pole piece, obtain the size of many lug spacings on the pole piece, as the lug forming panel of square electric core.
When the present invention uses oval volume pin to reel, after the lug position of the oval electric core of winding made mark, launch pole piece, measure the size of gauge point on the pole piece, obtain the size of many lug spacings on the pole piece, as the lug forming panel of the electric core of ellipse.
The present invention reduces the distance of pole piece to electrode terminal, reduces internal resistance, reduces heat during discharge and generates, and improves fail safe; Reduce the pressure drop that internal resistance produces, improve discharge platform; Anodal needs 1, and negative pole also only needs 1, has improved the consistency of pole piece, reduce the pole piece corner, and burr reduces, and reduces the defective products of internal short-circuit and low pressure than laminated type battery, improve rate of finished products, improve efficiency of assembling, also reduced the risk that indivedual lug fractures cause pole piece complete failure simultaneously, be suitable for high-multiplying power discharge, charging and discharging currents is evenly distributed, and when carrying out high current charge-discharge, is not easy to produce and analyses lithium, battery cycle life is long, and is safe; Positive and negative plate is to be communicated with one, the low phenomenon of holding can not occur, and is difficult for that also the part takes place and analyses lithium and produce security incident; Solve the difficult problem that baby battery is unsuitable for lamination.
Description of drawings
Accompanying drawing 1 is the positive plate front elevation after the present invention applies.
Accompanying drawing 2 is that the present invention applies back positive plate reverse side figure.
Accompanying drawing 3 is positive plate sectional views of the present invention.
Accompanying drawing 4 is that the present invention applies back negative plate front elevation.
Accompanying drawing 5 is that the present invention applies back negative plate reverse side figure.
Accompanying drawing 6 is negative plate sectional views of the present invention.
Accompanying drawing 7 is the positive plate front elevations after the lug moulding of the present invention.
Accompanying drawing 8 is the negative plate front elevations after the lug moulding of the present invention.
Accompanying drawing 9 is the present invention's positive pole, negative pole, diaphragm position schematic diagrames when reeling.
Accompanying drawing 10 is Z-Z schematic cross-sections of accompanying drawing 9 of the present invention.
Accompanying drawing 11 is electric core schematic diagrames after the present invention reels.
Accompanying drawing 12 is the schematic diagrames behind the present invention's electricity core erection welding lug.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, the present invention with active material with make mixing paste after conductive agent, bonding agent fully mix by a certain percentage, be coated on the collector by methods such as roller coat, blade coating or sprayings, front surface coated lotion 12 at positive plate, front, 1 edge at the length direction of positive plate reserves blank position 11, apply lotion 22 at the back side of positive plate, reserve blank position 21 at the back side, 1 edge of the length direction of positive plate.
Shown in accompanying drawing 4, accompanying drawing 5, accompanying drawing 6, the negative plate of the present invention position 41 that leaves some space in the front, 1 edge of length direction, remainder is coated with full lotion 42, the negative plate position 51 that leaves some space at the back side, same 1 edge of length direction, and remainder is coated with full lotion 52; Design reel to finish negative pole bag tail, and the negative plate back side is except the position 51 that leaves some space, 1 edge, and a circle blank position 53 is reserved at the back side again, and to alleviate battery weight, all the other are coated with full.
As shown in Figure 7, the present invention is provided with many spaced lugs 71 on the reservation blank position of positive plate, and lug at interval is by rolling cut or cutting die is die-cut or the laser cutting mode is made.The width of lug can be taken all factors into consideration according to electric core width and overcurrent capability and obtains.
Many spaced lugs 71 are set on the reservation blank position of positive plate, and lug at interval is by rolling cut or cutting die is die-cut or the laser cutting mode is made.The width of lug can be taken all factors into consideration according to electric core width and overcurrent capability and obtains, the lug width with helix regularity of distribution that present case relates to is 6.5mm, the lug spacing is to become along with the number of turns of pole piece coiling, use square volume pin to reel by the present invention, after the lug position of the square electric core of winding made mark, launch pole piece, measure the size of gauge point on the pole piece, the concrete spacing of multipole ear is distributed as on the acquisition pole piece: 1.5mm, 30.5mm, 6mm, 31mm, 6.5mm, 32mm, 7.5mm, 33mm, 8.5mm, 34mm, 9mm, 35mm, 9.5mm, 36mm, 10.5mm.
As shown in Figure 8, the reservation blank position of the present invention's negative plate is provided with lug 81 at interval, lug at interval be by rolling cut, cutting die is die-cut or the laser cutting mode is made.The width of lug can be taken all factors into consideration according to electric core width and overcurrent capability and obtains, the lug width with helix regularity of distribution that present case relates to is 6.5mm, the lug spacing is to become along with the number of turns of pole piece coiling, use square volume pin to reel by the present invention, after the lug position of the square electric core of winding made mark, launch pole piece, measure the size of gauge point on the pole piece, the concrete spacing of multipole ear is distributed as on the acquisition pole piece: 1.5mm, 30.5mm, 6mm, 31mm, 6.5mm, 32mm, 7.5mm, 33mm, 8.5mm, 34mm, 9mm, 35mm, 9.5mm, 36mm, 10.5mm, 36.5mm.
Lug at interval is to follow following polar equation:
ρ＝aθ+P0
In the formula:
A-spiral of Archimedes coefficient, represents that the increase (or reducing) in utmost point footpath when every rotation 1 is spent is measured, i.e. a=L/360 by mm/ °;
θ-polar angle, unit is degree, total number of degrees that the expression spiral of Archimedes turns over;
The utmost point footpath of P0-in the time of t=0 °, mm.
L=positive plate thickness+negative plate thickness+2 layer membrane thicknesses.
θ is used for determining the position of lug moulding, and when polar angle θ increased progressively with the integral multiple of π, guaranteeing to reel after the lug moulding of same polarity can be overlapping.
Shown in accompanying drawing 9 and accompanying drawing 10, negative plate 102 was placed on the barrier film 103 when the present invention reeled, and wrapped negative plate is whole with barrier film, and negative plate 102 is in barrier film 103, negative plate lug 81 stretches out at barrier film one side, and the dressing of negative plate partly is in the middle position of barrier film; Elder generation's coiling half-turn is placed on positive plate 101 on the barrier film again, one side positive plate lug 71 stretches out the same of barrier film with negative plate, positive plate, barrier film and negative plate is wound into electric core, and barrier film parcel outmost turns is fixed with the termination adhesive tape.
As shown in Figure 11, a folded neat negative plate lug 111 and a folded neat positive plate lug 112 formed on the present invention's electricity core top.At first make the lug forming panel, after becoming electric core by pole piece coiling, after the lug position of the electric core of winding made mark, launch pole piece, measure the size of gauge point on the pole piece, obtain the size of multipole ear space on the pole piece, obtain the lug forming panel, negative plate lug at interval is by according to the lug forming panel, by rolling cut, cutting die is die-cut or the laser cutting mode is made.Positive plate lug at interval is by according to the lug forming panel, by rolling cut, cutting die is die-cut or the laser cutting mode is made.Adopt the mode of reeling that negative plate is placed on the barrier film, with barrier film negative plate is wrapped, the blank lug of negative plate stretches out at barrier film one side, behind the volume half-turn positive plate is inserted between volume pin and the barrier film, the blank lug of positive plate also stretches out in blank lug the same side of negative plate, and positive plate, barrier film and negative plate are wound into electric core, barrier film is around electric core outer ring, fix with the termination adhesive tape, its septation is than the wide 2-3mm of negative pole, and negative pole is than anodal wide 1-2mm; Have the blank lug of a folded neat negative plate and the blank lug of a folded neat positive plate independently to arrange on electric core, this is all to have a corresponding lug position to stretch out on each layer pole piece by electric core to form.
Shown in attached 12, the present invention fixes a folded neat positive plate lug by ultrasonic bonding with aluminium pole ears 121 welding of band lug glue, it is fixing with nickel lug 122 welding of band lug glue to fold neat negative plate lug by ultrasonic bonding with one equally, has promptly finished the assembling of the multipole ear winding electricity core with the distribution of helix rule.
With the electric core that welds positive and negative electrode carry out the back operation encapsulation, vacuumize, fluid injection, seal, change into, partial volume, check, obtain battery.
The method of implementing is not limited to above-mentioned example, as long as use marrow of the present invention is reeled and assembled and make lithium ion battery, all belongs to protection scope of the present invention.Be wound into 1 electric core such as preferred 1 positive pole of the present invention, 1 barrier film, 1 negative pole, also can be painstakingly 2 or many positive poles, 2 or many barrier films, 2 or many negative poles be wound into 2 or a plurality of electric core, superimposed again welding in parallel is to amplify; Barrier film more than perhaps painstakingly multireel one circle or encloses outside the electric core of reeling; Stretch out such as the same end of the preferred lug of the present invention, also can stretch out from the two ends of electric core respectively at electric core; Such as the preferred rectangular cell of the present invention, also can be made into ellipse or cylindrical battery.
Claims (9)
1. spiral-line multi-pole lug lithium ion battery pole piece, active material with make mixing paste after conductive agent, bonding agent fully mix by a certain percentage, be coated on the collector, front, 1 edge at the length direction of pole piece reserves blank position, the back side, 1 edge at the length direction of pole piece reserves blank position, remainder is coated with full lotion, it is characterized in that being provided with on the reservation blank position of pole piece many spaced lugs.
2. a kind of spiral-line multi-pole lug lithium ion battery pole piece according to claim 1, it is characterized in that at interval lug is the lug moulding of same polarity after, it is overlapping to reel, and has a folded neat lug independently to arrange in the end.
3. spiral-line multi-pole lug lithium ion battery, comprise positive plate, negative plate and the barrier film that places therebetween, active material is made mixing paste and is coated on the collector, front, 1 edge at the length direction of positive plate reserves blank position, the back side, 1 edge at the length direction of positive plate reserves blank position, remainder is coated with full lotion, active material is made mixing paste and is coated on the collector, front, 1 edge at the length direction of negative plate reserves blank position, the back side, 1 edge at the length direction of negative plate reserves blank position, remainder is coated with full lotion, it is characterized in that many spaced lugs are set on the reservation blank position of positive plate, many spaced lugs are set on the reservation blank position of negative plate.
4. a kind of spiral-line multi-pole lug lithium ion battery according to claim 3 is characterized in that lug at interval is to follow following polar equation: ρ=a θ+P0,
In the formula: a-spiral of Archimedes coefficient, unit is mm/ °, represents increase (or reducing) amount in utmost point footpath when every rotation 1 is spent, a=L/360;
θ-polar angle, unit is degree, total number of degrees that the expression spiral of Archimedes turns over; θ is used for determining the position of lug moulding,
The utmost point footpath of P0-in the time of t=0 °, unit is mm,
L=positive plate thickness+negative plate thickness+2 layer membrane thicknesses, unit is mm.
5. a kind of spiral-line multi-pole lug lithium ion battery according to claim 3, it is characterized in that at interval lug is the lug moulding of same polarity after, it is overlapping to reel, and has a folded neat lug independently to arrange in the end.
6. spiral-line multi-pole lug lithium ion battery manufacture method, make positive plate, active material is made mixing paste to be coated on the collector, front, 1 edge at the length direction of positive plate reserves blank position, the back side, 1 edge at the length direction of positive plate reserves blank position, remainder is coated with full lotion, make negative plate, active material is made mixing paste to be coated on the collector, front, 1 edge at the length direction of negative plate reserves blank position, the back side, 1 edge at the length direction of negative plate reserves blank position, remainder is coated with full lotion, adopt the mode of reeling that negative plate is placed on the barrier film, with positive plate, barrier film and negative plate are wound into electric core, fix with the termination adhesive tape, just will weld, the electric core of negative pole carries out the encapsulation of back operation, vacuumize, fluid injection, seal, change into, partial volume, check, obtain battery, it is characterized in that many spaced lugs are set on the reservation blank position of positive plate, many spaced lugs are set on the reservation blank position of negative plate.
7. a kind of spiral-line multi-pole lug lithium ion battery manufacture method according to claim 6 is characterized in that lug at interval is to follow following polar equation: ρ=a θ+P0,
In the formula: a-spiral of Archimedes coefficient, unit are mm/ °, a=L/360;
θ-polar angle, unit is used for determining the position of lug moulding for degree, θ,
The utmost point footpath of P0-in the time of t=0 °, unit is mm,
L=positive plate thickness+negative plate thickness+2 layer membrane thicknesses, unit is mm.
8. a kind of spiral-line multi-pole lug lithium ion battery manufacture method according to claim 6, it is characterized in that lug is by according to the lug forming panel, by rolling cut or cutting die is die-cut or the laser cutting mode is made, the lug forming panel is after becoming electric core by pole piece coiling, after the lug position of the electric core of winding made mark, launch pole piece, measure the size of gauge point on the pole piece, obtain the size of multipole ear space on the pole piece, as the lug forming panel.
9. a kind of spiral-line multi-pole lug lithium ion battery manufacture method according to claim 6, it is characterized in that at interval lug is the lug moulding of same polarity after, it is overlapping to reel, and has a folded neat lug independently to arrange in the end.Anode ear and negative electrode lug independence proper alignment, positive and negative lug can be distributed in the same end of electric core, also can be respectively at the two ends of electric core.
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| CN200910192367A CN101714624A (en) | 2009-09-11 | 2009-09-11 | Spiral-line multi-pole lug lithium ion battery and method for manufacturing same |
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| CN200910192367A CN101714624A (en) | 2009-09-11 | 2009-09-11 | Spiral-line multi-pole lug lithium ion battery and method for manufacturing same |
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