CN104143628B - The rolling methods of electrode material and rolling equipment - Google Patents
The rolling methods of electrode material and rolling equipment Download PDFInfo
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- CN104143628B CN104143628B CN201410190869.7A CN201410190869A CN104143628B CN 104143628 B CN104143628 B CN 104143628B CN 201410190869 A CN201410190869 A CN 201410190869A CN 104143628 B CN104143628 B CN 104143628B
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- 239000007772 electrode material Substances 0.000 title claims abstract description 145
- 238000005096 rolling process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 82
- 239000000463 material Substances 0.000 claims description 40
- 238000005452 bending Methods 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000001629 suppression Effects 0.000 abstract description 2
- 239000013543 active substance Substances 0.000 description 10
- 239000011888 foil Substances 0.000 description 8
- 238000007906 compression Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920006359 Fluoroplast Polymers 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229950000845 politef Drugs 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides rolling methods and the rolling equipment of electrode material, it is possible to easily carry out the adjustment of the elongation in the uncoated portion of electrode material, it is possible to produce fold on suppression electrode material.The uncoated portion using uncoated portion extension mechanism only to make to be applied with the electrode material of tension force between deflector roll extends, thereafter, and roll-in electrode material.Uncoated portion extension mechanism is configured to produce on electrode material tension force between two deflector rolls, possesses the pressing roller pressed electrode material with the intrusion of regulation between deflector roll.
Description
Technical field
The present invention relates to rolling methods and the rolling equipment of electrode material.
Background technology
The electrode material of the negative or positive electrode of lithium ion battery, capacitor etc. is at (the metal such as aluminium foil, Copper Foil
Paper tinsel collector body) banding substrate two sides on coated electrode active substance, it addition, improving active matter
The density of matter also makes its mode in uniform thickness carry out roll-in (compression process) by rolling equipment.Carry out
After this roll-in, electrode material coils into coiled type, batches coil as electrode material goods shipment or transfer
To next step operation.
Preferably roll-in is processed as, and the paper tinsel as base material is not only compressed processing with not being rolled to active substance.
But it practice, be compressed adding man-hour when rolling equipment, as the paper tinsel of base material by a little rolling.The opposing party
Face, electrode material is in the width two side portions of the paper tinsel as base material, in order to ensure welding input and output
The part of the labelling of electric power and uncoated active substance.Therefore, the coated portion of the active material of roll-in is become
Electrode material with uncoated portion.If the such electrode material of roll-in, the most only coated portion apply load and make
Only the paper tinsel of coated portion is by rolling (extension).Now, because the paper tinsel in uncoated portion is not rolled (extension),
So coated portion and uncoated portion produce length difference on electrode material length direction.If producing this length difference,
Then become the main cause producing fold on electrode material.That is, there is the coating region that paper tinsel extends because of roll-in
In the case of the uncoated areas that territory and paper tinsel do not extend, owing to only uncoated areas is applied by carrying tension force
Region by tension force, does not therefore produce fold due to both tension imbalances.Produce fold carrying,
During batching, develop into deeper fold or fracture, there is the probability can not carried, batch.
Especially, the extension difference of coated portion and uncoated portion the fold caused, in the feelings of roll-in electrode material
Becoming bigger problem under condition, described electrode material is alternately shape on the width as the paper tinsel of base material
Coated portion and the i.e. striated in uncoated portion ground is become to form the electrode material of coated portion.
Such as there is the coated portion as elimination electrode material described in patent documentation 1～3 and uncoated portion
The method of extension difference.
In patent documentation 1, propose following method, on electrode foil, produce deformation after preventing compacting and make pressure
Speed processed improves, to this end, when through-thickness compacting electrode for cell paper tinsel, so that uncoated portion compacting
The elongation mode identical with the elongation of coated portion dividing potential drop to coating part with uncoated portion respectively
Suppressing, described electrode for cell paper tinsel has and applies electricity on the length direction of the collector foil of strip continuously
The coating part of pole active substance and on the length direction of collector foil being not coated with of uncoated electrode active material
Apply part.
In patent documentation 2, propose following method, be not provided with otch in the uncoated portion of electrode foil, for
The length making the length of the coated portion after compacting and uncoated portion is roughly equal, has the collector foil of strip
On length direction, continuously coating electrode active material applies partly and the most continuous at the length direction of collector foil
In the drawing method of the electrode for cell paper tinsel of the uncoated portion of ground coated electrode active substance, in uncoated portion
Divide the shape that transfer is concavo-convex, after applying part extension, by the most continuous for electrode for cell paper tinsel
Compacting.
In patent documentation 3, the rectification journey of the electrode caused to eliminate the operating by production line and stopping
Degree is the problem of deviation because of position, it is proposed that following electrode manufacturing apparatus, and it possesses Rolling roller and is rolled
The perforating press optionally pressed uncoated portion after roller pressing, the pressing of described Rolling roller includes being coated with electrode
Close the coated portion of material and the collector body in the uncoated portion of uncoated electrode conjunction material.
Prior art literature
Patent documentation
Patent documentation 1: 2012 No. 69266 publications of Japanese Unexamined Patent Publication
Patent documentation 2: 2012 No. 79592 publications of Japanese Unexamined Patent Publication
Patent documentation 3: 2013 No. 30360 publications of Japanese Unexamined Patent Publication
Summary of the invention
Method described in patent documentation 1～3, any is all by electrode with roller or puncher etc.
Material is directly clamped, partly the method in rolling uncoated portion.In this case, roller or puncher etc.
Gap need several μm atomic little adjustment.I.e., the adjustment of elongation commonly assumes that 1～about 3%.
The thickness of the paper tinsel of the electrode material of such as lithium battery is about 10～15 μm recently, and the thickness at paper tinsel is 10 μm
In the case of, and when elongation is 1%, then need uncoated portion from 10 μm rollings to 9.8 μm.
This is difficult to be adjusted by the gap of such as up-down rollers realize.
It is an object of the invention to provide rolling methods and the rolling equipment of electrode material, it is possible to easily adjust
The elongation in the uncoated portion of whole electrode material, and electrode material can be suppressed to produce fold.
For solving the scheme of problem
It is a feature of the present invention that use pressing roller only makes to be applied in the electrode material of tension force between deflector roll
Uncoated portion extends, thereafter, and roll-in electrode material.
In accordance with the invention it is possible to be easily adjusted the elongation in the uncoated portion of electrode material, and can suppress
Electrode material produces fold.
Problem other than the above, structure and effect are clearer and more definite by the explanation of implementation below.
Accompanying drawing explanation
Fig. 1 is that the rolling equipment of the electrode material summarily representing the first embodiment of the present invention is overall
System pie graph.
Fig. 2 (a) is to show schematically in one embodiment of the invention the width side by the electrode material of roll-in
To the figure in cross section.
Fig. 2 (b) is to show schematically in one embodiment of the invention the plane by the electrode material of roll-in
The figure of a part.
Fig. 3 (a) is to show schematically in one embodiment of the invention (to be coated with by other electrode material of roll-in
Deposited portion is the electrode material of striated) the figure in width cross section.
Fig. 3 (b) is to show schematically in one embodiment of the invention by the electrode material (coated portion of roll-in
Electrode material for striated) the figure of a part of plane.
Fig. 4 (a) is the side view of the uncoated portion extension mechanism of one embodiment of the invention.
Fig. 4 (b) is the direction view observed from the arrow F4b of Fig. 4 (a).
Fig. 5 is the front view of the major part of the pressing roller of one embodiment of the invention.
Fig. 6 is the figure of the effect that the present invention is described.
Fig. 7 is the side view of the uncoated portion extension mechanism of the embodiment of other of the present invention.
Fig. 8 is the front view of the major part of the pressing roller of the embodiment of other of the present invention.
Fig. 9 is the front view of the pressing roller of the embodiment of other of the present invention.
Figure 10 is the side view of the uncoated portion extension mechanism of the embodiment of other of the present invention.
In figure: 1 unreeling machine, coil before 2 compactings, 3 electrode materials, the upper pressure roller of 4a, under 4b
Pressure roller, 5 electrode materials, 6 coiling machines, coil after 7 compactings, 8a, 8b uncoated portion elongator
Structure, 30 electrode material substrate, 31,32 electrode active materials (the area of application/coated portion), 33 are not
The area of application/uncoated portion, 81 entrance rollers, 82 deflector rolls, 83 niprolls, 84 pressing roller, 84b
Bearing, 84c cylinder, 84e bias pressing roller, 84ec center of rotation, 84s axle, 85 deflector rolls,
86 niprolls, 87 outlet rollers, 88 heaters, 90 rubber, 90r edge part, 91 deflector rolls,
92 heating rollers, 93～96 niprolls.
Detailed description of the invention
Hereinafter, use accompanying drawing that embodiments of the invention are illustrated.
Fig. 1 represents the overall summary of the rolling equipment of one embodiment of the invention.Entrance in roll squeezer main body
Side is provided with unreeling machine 1, and described unreeling machine 1 is equipped with the electrode material of lithium ion secondary battery electrode material etc.
Coil 2 before the compacting wound with expecting 3 coiled types, the outlet side in roll squeezer main body is provided with roll-in
After electrode material 5 wind and become compacting after the coiling machine 6 of coil 7.
Roll squeezer main body possesses upper pressure roller 4a and lower compression roller 4b, at upper pressure roller 4a and the chien shih of lower compression roller 4b
Electrode material passes through and carries out compression process.Although the diagram of omission, but possess in roll squeezer main body: adjust
Upper gap between lower compression roller 4a, 4b or the screwdown gear of compressive load；Make lower compression roller 4a, 4b and volume
Take the drive mechanism that machine 6 drives with synchronously can controlling rotary speed；And revise the camber of the bending of roller
Mechanism etc..
Although it is it addition, omit diagram, but in rolling equipment, (upper and lower at unreeling machine 1 and roll squeezer main body
Pressure roller 4a, 4b) between and roll squeezer main body and coiling machine 6 between, be provided with for electrode material 3
Tension control mechanism and multiple deflector roll for carrying electrode material.Although it addition, omit diagram, but
The thickness measure system of the thickness of the electrode material 5 after measuring roll-in it is provided with in the downstream of roll squeezer main body
System, is additionally provided with measured value based on thickness measurement system and controls the control dress of screwdown gear and bending mechanism
Put.
Further, in the present embodiment, between unreeling machine 1 and roll squeezer main body and roll squeezer main body and volume
Take and between machine 6, be respectively arranged with uncoated portion extension mechanism 8a, 8b.For uncoated portion extension mechanism
Details is aftermentioned.
Although electrode material 3 is that an example illustrates with lithium ion battery, but as long as being at the two of banding substrate
The material of coated electrode active substance on face, regardless of its kind, it is also possible to be other battery or capacitor etc.
Electrode material.As shown in Fig. 2 (a), Fig. 2 (b), by metal foil current collector base material (such as aluminium foil,
Copper Foil etc.) 30 and be arranged at active substance (the area of application/coated portion) 31,32 structure on base material 30 two sides
Become.Electrode material self because no matter positive pole with, negative pole with equal it is known that so omit the description.At banding base
The flow direction both sides of material 30, are provided with the uncoated areas/uncoated portion 33 of uncoated active substance.
In Fig. 2 (a), Fig. 2 (b), active substance is set the most over the entire width, but as Fig. 3 (a),
Shown in Fig. 3 (b), also have on the width of base material 30, alternately form coated portion (electrode activity thing
Matter) 31,32 and uncoated portion 33, i.e. use striated ground to form the electrode material 3 of coated portion 31,32
Situation.The width in uncoated portion 33 for example, 5～about 25mm.The present invention is formed at rolling striated
In the case of the electrode material 3 of coated portion 31,32 especially effectively, in the following description, to rolling bar
The situation of the electrode material 3 that stricture of vagina shape ground forms coated portion 31,32 illustrates.
To have the electrode material 3 situation by pressure roller 4a, 4b compression process in coated portion and uncoated portion
Under, as stated in the Background Art, base material 30 active substance 31,32 coated portion (region) intensively
Applying compressive load, the paper tinsel of the coated portion of base material 30 extends, and uncoated portion 33 does not extends.Electricity after roll-in
Pole material 3 pressure roller, coiling machine coil between only to uncoated portion 33 apply carrying tension force, and coating
Portion 31,32 extends owing to producing, and applies inner tensions the most hardly.Accordingly, because both injustice
Weigh and easily produce fold.Especially, base material be about such as 10～15 μm thin foil in the case of,
The fold produced, during carrying, batching, develops into deeper fold or ruptures deflector roll is first-class, becomes
For the main cause can not carried, batch.
In the present embodiment, by arranging uncoated portion extension mechanism 8a, 8b of the following stated, can
Easily make uncoated portion extend and suppress the generation of fold.
Use Fig. 4 (a), Fig. 4 (b), Fig. 5 and Fig. 6 that uncoated portion extension mechanism 8a, 8b are described.
The main element of uncoated portion extension mechanism 8a, 8b of the present embodiment is: entrance roller 81,
Deflector roll 82, niproll 83, pressing roller 84, deflector roll 85, niproll 86, outlet roller 87 and heater
88, by only the uncoated portion of the electrode material of tension force will be applied with between deflector roll 82,85 by pressing roller 84
Pressing, thus only make the uncoated portion 33 of electrode material extend, the width counter electrode of described pressing roller 84
The width in the uncoated portion 33 of material.
Further, in the present embodiment, before and after uncoated portion extension mechanism is arranged at roll squeezer main body, at roller
Before pressure so that it is extend by coated portion elongation only about half of, at roller during roll squeezer main body roll-in electrode material
After pressure so that it is extend by coated portion elongation only about half of during roll squeezer main body roll-in electrode material.
Free roll 81,88 and deflector roll 82,85 use such as mother metal be ferrum, aluminum etc. and at its plated surface with firmly
The material of chromium (HCr).Niproll 83,86 uses the rubber rollers such as EP rubbers (EPDM).Pressing roller
84 plated surface HCr using the rigid roller being made up of at mother metal ferrum, aluminum etc. or be provided with rubber, resin etc.
Material.Additionally, the material of these rollers is not limited to above-mentioned material.
It addition, entrance roller 81, niproll 83, pressing roller 84, niproll 86, outlet roller 87 are freely
Roller, deflector roll 82,85 is for driving roller.
Entrance roller 81 and outlet roller 87 configure as follows, the deflector roll 82,85 before and after pressing roller 84
Between give deflector roll and electrode material 3 can be applied the enough of tension force and embrace angle.It is therefore prevented from from deflector roll
Floating of electrode material, does not produce fold etc. in other positions, it is possible to only make the plastic deformation of uncoated portion (prolong
Stretch).
Niproll 83,86 is joined to be respectively facing in the way of deflector roll 82,85 imposes pressing load (by pressure)
Put.If the pressing of niproll 83,86 being loaded and being denoted as F, by between deflector roll 82,85 and electrode material 3
Frictional force be denoted as μ, then electrode material 3 guide maximum tension Tg can be expressed as Tg=F μ.Logical
Electrode material is clamped in the deflector roll portion before and after pressing roller of crossing, and prevents electrode material from floating from deflector roll, thus at it
He does not produce fold etc. in position, it is possible to only make uncoated portion plastic deformation (extension).
In the case of uncoated portion extension before roll-in (in the case of uncoated portion extension mechanism 8a), under
The deflector roll 85 of trip side (pressure roller side) is same with the actuating speed with the roll squeezer main body i.e. transporting velocity of production line
The mode of step is driven.Make the deflector roll 82 of upstream side (opposition side of pressure roller) with somewhat (0～about 2%)
It is slower than downstream deflector roll 85 ground to rotate, and on electrode material, produces enough tension force between deflector roll 82,85
Mode carries out pulling force control.
It addition, uncoated portion after roll-in extend in the case of (the situation of uncoated portion extension mechanism 8b
Under), the deflector roll 82 of upstream side (pressure roller side) is with the actuating speed with the roll squeezer main body i.e. carrying of production line
The mode of speed sync is driven.Make the deflector roll 85 in downstream (opposition side of pressure roller) with somewhat (0～2%
Left and right) be faster than upstream side deflector roll 82 ground rotate, and between deflector roll 82,85 on electrode material produce foot
The mode of enough tension force carries out pulling force control.
The electrode material between deflector roll 82,85 can be made to produce by the tension control mechanism etc. of rolling equipment
Enough in the case of tension force, deflector roll 82,85 can also be free roll.But, by drive deflector roll 82,
85 and make the actuating speed of the deflector roll in downstream the fastest such that it is able to improve the tension force between deflector roll, it is easy to
Electrode material (base material) is imposed plastic deformation (extension).
As shown in Fig. 4 (b) or Fig. 5, the width in the width correspondence uncoated portion 33 of pressing roller 84, front
Other the width of roller such as rear deflector roll 82,85 is more than the material width of electrode material 3.By making electrode
Material, along width deflector roll more than the width of electrode material, prevents floating from deflector roll of electrode material,
Fold etc. is not produced, it is possible to only make uncoated portion plastic deformation (extension) in other positions.
Mechanism pressing roller 84 pressed to electrode material, uses and carries out with a fixed load or certain position
The mechanism of pressing.Carry out pressing with certain position to be prone to be set.
In the case of make uncoated portion extend with room temperature, in the case of the extension carrying out more than certain elongation,
There is the probability of fracture in electrode material (base material).In the case of extending with room temperature, although according to base
The characteristic of material (aluminium foil etc.), but the boundary of elongation is about 1%.Therefore, in the present embodiment, logical
Cross by heater 88 heating electrode material (base material) so that the endurance of base material declines, with low by pressure or
Person's low-tension will not make Materials Fracture, it is possible to makes uncoated portion extend more.As heater 88, permissible
Use laser, halogen heater, infrared heater etc..Further, will be not coated with in the front of pressing roller 84
Apply portion 33 the most quickly to heat.Because in the aluminum that the conduction of heat used at base material is higher, be also easy to
It is not intended to the coated portion heat transfer extended, so pinpointing and heating in front of pressing roller, makes the resistance to of base material
Power or yield point decline, it is desirable to be prone to the plastic deformation (extension) in the only uncoated portion that carries out.Such as, although
Also according to the material of base material, but by being heated to be 50～200 DEG C, endurance is made to decline 1～about 3 one-tenth.
Additionally, can not make with room temperature uncoated portion extend with rupturing sufficiently long in the case of, it is possible to omit
Heater 88 is set.Press alternatively, it is also possible to replace heater 88 or heat on the basis of heater 88
Pressure roller 84, makes electrode material (base material) extend by the pressing roller 84 of heating.
Fig. 5 represents the structure of pressing roller 84.As it has been described above, the width correspondence uncoated portion of pressing roller 84
The width of 33.It addition, to arrange in the way of axle 84s is prominent.Axle 84s is kept by bearing.So that
The position of bearing is moved and is adjusted the mode of intrusion and constitute.Pressing roller 84, axle 84s are made up of rigid roller.
Pressing roller 84 has executed rubber 90 on surface.Concentrate it addition, arrange circular arc at edge part 90r to relax stress
And prevent fold or Materials Fracture.The circular arc of edge part 90r is expected to the surface of pressing roller and is plated with HCr
Pressing roller in the case of formed.
Pressing roller 84 can also be made up of harder and that sliding is good resin.Permissible as this resin
Use the fluoroplasts etc. such as politef.By using this material, it is possible to be effectively prevented fold or material
Material fracture.
Although the pressing roller 84 that diameter is less is prone to produce and extends, but because the probability of fracture uprises, because of
This is confirming suitably by test etc. in advance, uses the diameter roll that fracture probability does not uprises.
It addition, because the position of pressing roller 84 more can stably be carried out closer to the deflector roll 82 of upstream side
Extend, it is advantageous to make the deflector roll 82 being closely located to upstream side of pressing roller 84 within the bounds of possibility.
Use Fig. 6 that the effect of the present invention is described.
If the radius of pressing roller is designated as r, pressing quantity is designated as α, then elongation percentage substantially can use L2/L1 table
Show.Additionally, L1 and L2 is tried to achieve by following formula.
L2=r × cos-1((r―α)/r)
Such as, r be 40mm, in the case of elongation percentage is 1%, pressing quantity α is about 0.1mm.
Additionally, deflector roll spacing is such as about 90mm.
In the case of electrode material being clamped and only uncoated portion is partly carried out rolling, such as base material
In the case of thickness is 10 μm, and when elongation is 1%, then it is necessary uncoated portion from 10 μm
Rolling is to 9.8 μm.In other words, need to carry out clearance between roll adjustment with 0.2 μm grade.To this, at this
It is in embodiment, unrelated with the thickness of base material, as long as pressing quantity is set with 0.1mm (100 μm) left and right
Determine, adjust.Therefore, in the present embodiment, compared to the grade (0.2 μm) of the situation of rolling, energy
Enough by setting with the pressing quantity of adjustment extremely readily grade (0.1mm), adjust, thus with expectation
Elongation percentage make uncoated portion extend.
In the above-described embodiment, before and after uncoated portion extension mechanism is arranged at roll squeezer main body, roll-in
Before so that it is extend in the amount (elongation (rate) extended with coated portion during roll squeezer main body roll-in electrode material
Be determined by test etc. in advance) only about half of, after roll-in so that it is extend in and use roll squeezer main body
During roll-in electrode material, the amount of coated portion extension is only about half of.But it is possible at uncoated portion extension mechanism
In 8a, 8b, the ratio to the amount extended suitably sets., if setting and not having uncoated portion to extend
The uncoated portion produced in the case of mechanism and the difference of the elongation of coated portion are 1, then prolonged by uncoated portion
Stretch in mechanism 8a, 8b and extend to each half, thus in the uncoated portion that rolling equipment produces and coated portion
The difference of elongation maximum can be down to 0.5, it is possible to effectively suppresses the generation of fold.
It addition, in the above-described embodiments, although before uncoated portion extension mechanism is arranged at roll squeezer main body
After, but only uncoated portion extension mechanism 8a can also be set for upstream side in roll squeezer main body, before roll-in,
It is made to extend in the amount extended with coated portion during roll squeezer main body roll-in electrode material.This is because compared to roller
Coated portion before pressure and the difference of the extension in uncoated portion, because of the coated portion of generation and prolonging of uncoated portion after roll-in
The difference stretched is more prone to fold, it addition, fold easily deepens in handling process.And only in roll squeezer main body
Upstream side uncoated portion extension mechanism 8a is set in the case of this probability less.
It addition, in the above-described embodiments, although the roller width (direction of principal axis length) of the deflector roll etc. before and after pressing roller
More than electrode material width, but it also is able to be several times as much as before and after the width of pressing roller arranges pressing roller with width
Deflector roll, is pressed against pressing roller uncoated portion and only makes uncoated portion extend.
According to the present embodiment, only by the uncoated portion of the electrode material by applying enough tension force between deflector roll by
Pressing roller presses, it becomes possible to the most only make the uncoated portion of electrode material extend.Therefore, after roll-in
In electrode material, because the generation of the difference extended between uncoated portion and coated portion can be suppressed, so energy
Enough suppression produce fold at electrode material.Thus, the electrode material after roll-in carrying, batch and become easy.
Use Fig. 7 that other embodiments of the present invention are described.The present embodiment uses heating roller 92 as pressing
The method of heating electrode material 3 in front of pressure roller 84.It is built-in with heater etc. in the inside of heating roller 92.Add
The width that the width of hot-rolling 92 also has as pressing roller 84 and uncoated portion 33 is identical.It addition, add
Hot-rolling 92 is different from pressing roller 84, and it is configured at the position just contacted with electrode material 3.It addition, pass through
Heating roller 92 is set, thus excessively opens between deflector roll 82 and deflector roll 85, so arranging new deflector roll 91.
It also is able in the present embodiment play the effect identical with above-described embodiment.
Use Fig. 8 that other embodiments of the present invention are described.The pressing roller of the present embodiment is eccentric pressing roller
84e.I.e., at the center from pressing roller 84, the position of only eccentric e has center of rotation 84ec.This bias is pressed
Pressure roller 84e is the driving roller different from pressing roller 84.Other are same as the previously described embodiments.
By using eccentric pressing roller 84e to be pressed into, carry out interrupted pressing and extend.Thus, by weight
The pressing extension of the multiple state carrying out equally applying from the face of tension force Yu electrode material, carries out specifying
Extend.Especially, in the case of elongation is less, intrusion diminishes, and there is the adjustment of intrusion, sets
The fixed probability becoming difficulty.In this case, by using eccentric pressing roller that intrusion can be made to arrive greatly necessarily
Degree, and, if seen in certain length, then can become the elongation (rate) of regulation.
Use Fig. 9 that other the embodiment of the present invention is described.The present embodiment uses cylinder 84c, will pressing
Roller presses electrode material intermittently.The position in the corresponding uncoated portion 33 of pressing roller 84 is arranged at axle 84s,
The two ends of axle 84s are provided with bearing 84b.Cylinder 84c is used to make bearing 84b move up and down, by pressing roller
84 press electrode material 2 intermittently.The conducts such as the such as ball screw framework beyond cylinder can be used to press
Mechanism.The present embodiment also is able to play the effect identical with above-described embodiment.
Use Figure 10 that other the embodiment of the present invention is described.The present embodiment uses the clamping being relatively large in diameter
Roller 93～96 make the electrode material 3 between deflector roll 82,85 produce tension force replace by niproll 83,86 by
Pressure deflector roll 82,85.Even if by doing so it is possible, the angle of embracing of deflector roll 82,85 diminishes and also is able to produce enough
Tension force, it addition, because the diameter of deflector roll can diminish, it is possible to shorten between deflector roll 82,85 away from
From such that it is able to the extension in uncoated portion is effectively carried out by pressing roller 84.
Other the embodiment of the present invention is illustrated.In the present embodiment, follow the trail of the bending of electrode material,
Make uncoated portion extension mechanism move to the width of electrode material, and make uncoated portion prolong by pressing roller
Stretch.Such as, the bending of detecting electrode material, and make pressing roller be moved in the width direction accordingly with this bending.
The curved detection of electrode material uses known bending detection device (omitting diagram).
The so-called bending following the trail of electrode material, in the case of the deflector roll before and after pressing roller uses niproll, only
It is positioned at the roller between these deflector rolls and pressing roller is followed the trail of.Deflector roll before and after pressing roller does not use the feelings of niproll
Under condition, it is possible to so that bending followed the trail of by the deflector roll etc. before and after beyond pressing roller.
By following the trail of the bending of electrode material in this wise and making pressing roller move such that it is able to make the uncoated portion can
Extend by ground.
Additionally, the present invention is not limited to the above embodiments, also include all variation.Such as, above-mentioned
Embodiment be the detailed description carried out to make the present invention should be readily appreciated that, be not limited to possess
Bright whole compositions.It addition, a part for the composition of some embodiment can replace the composition of other embodiments,
It addition, the composition of some embodiment can also add the composition of other embodiment.It addition, to each embodiment
The part of composition, it is possible to carry out adding, eliminating, replace other composition.
Claims (12)
1. a rolling methods for electrode material, has coated portion and not to the carrying direction along electrode material
The electrode material of coated portion carries out roll-in, and described coated portion is coated with electrode active material at substrate surface
Coated portion, described uncoated portion is in the uncoated portion of the above-mentioned electrode active material of substrate surface uncoated, on
The rolling methods stating electrode material is characterised by,
Only the above-mentioned uncoated portion of above-mentioned electrode material is pressed pressing roller and makes above-mentioned uncoated portion extend, its
After, the above-mentioned electrode material of roll-in, described electrode material is in the carrying direction interval along above-mentioned electrode material
It is applied in tension force between the deflector roll of ground configuration,
After the above-mentioned electrode material of rolling, only the above-mentioned uncoated portion of above-mentioned electrode material is pressed pressing roller also
Making above-mentioned uncoated portion extend further, described electrode material separates in the carrying direction along above-mentioned electrode material
It is applied in tension force between the deflector roll of compartment of terrain configuration,
In the extension in the above-mentioned uncoated portion before above-mentioned roll-in so that it is when extending in the above-mentioned electrode material of roll-in
Amount only about half of that above-mentioned coated portion extends, in the extension in the above-mentioned uncoated portion after above-mentioned roll-in, makes
When it extends in roll-in above-mentioned electrode material, the amount of above-mentioned coated portion extension is only about half of.
The rolling methods of electrode material the most according to claim 1, it is characterised in that
Above-mentioned uncoated portion after the extension in the above-mentioned uncoated portion before above-mentioned roll-in and above-mentioned roll-in
Extend each in, in above-mentioned deflector roll, make the driving of the above-mentioned deflector roll of pressure roller side and roll squeezer main body synchronously
Carry out rotating and drive, the above-mentioned deflector roll of the opposition side of pressure roller is carried out as follows rotation driving: with above-mentioned pressure roller side
Above-mentioned deflector roll compare, the situation of the extension in the above-mentioned uncoated portion before above-mentioned roll-in is relatively slow, after above-mentioned roll-in
The situation of extension in above-mentioned uncoated portion very fast.
The rolling methods of electrode material the most according to claim 1, it is characterised in that
Above-mentioned electrode material is heated in the front of above-mentioned pressing roller or above-mentioned pressing roller.
The rolling methods of electrode material the most according to claim 1, it is characterised in that
Carry out the pressing to above-mentioned electrode material of the above-mentioned pressing roller intermittently.
5. a rolling equipment for electrode material, has coated portion and not to the carrying direction along electrode material
The electrode material of coated portion carries out roll-in, and described coated portion is coated with electrode active material at substrate surface
Coated portion, described uncoated portion is in the uncoated portion of the above-mentioned electrode active material of substrate surface uncoated, on
The rolling equipment stating electrode material is characterised by possessing:
The roll squeezer main body of the above-mentioned electrode material of roll-in；
Unreeling machine, is arranged at the upstream side of above-mentioned roll squeezer main body, and winds above-mentioned electricity with being equipped with coiled type
Coil before the compacting of pole material；
Coiling machine, is arranged at the outlet side of above-mentioned roll squeezer main body, and is rolled up by the above-mentioned electrode material after roll-in
Coil after becoming compacting；And
Uncoated portion extension mechanism, makes to be arranged at above-mentioned electrode material upper of above-mentioned roll squeezer main body upstream side
State uncoated portion to extend,
Above-mentioned uncoated portion extension mechanism possesses joins on the carrying direction of above-mentioned electrode material at spaced intervals
The deflector roll put and the pressing roller in the above-mentioned uncoated portion only pressing above-mentioned electrode material between above-mentioned deflector roll,
In the above-mentioned deflector roll of above-mentioned uncoated portion extension mechanism, the above-mentioned deflector roll of roll squeezer main body side is configured to
Driving with above-mentioned roll squeezer main body synchronously carries out rotating driving, and the above-mentioned of the opposition side of roll squeezer main body is led
Roller is configured to compared with the above-mentioned deflector roll of above-mentioned roll squeezer main body side, the above-mentioned uncoated portion before above-mentioned roll-in
Situation about extending is relatively slow, and the extension situation in the above-mentioned uncoated portion after above-mentioned roll-in carries out rotating driving quickly.
The rolling equipment of electrode material the most according to claim 5, it is characterised in that
Above-mentioned uncoated portion extension mechanism it is also equipped with in the downstream of above-mentioned roll squeezer main body.
7. according to the rolling equipment of the electrode material described in claim 5 or 6, it is characterised in that
It is provided with the niproll the most relative with above-mentioned deflector roll.
8. according to the rolling equipment of the electrode material described in claim 5 or 6, it is characterised in that
It is provided with between above-mentioned deflector roll and the above-mentioned pressing roller of the upstream side of above-mentioned uncoated portion extension mechanism
Heat the mechanism of above-mentioned electrode material.
9. according to the rolling equipment of the electrode material described in claim 5 or 6, it is characterised in that
Above-mentioned pressing roller has heating function.
10. according to the rolling equipment of the electrode material described in claim 5 or 6, it is characterised in that
Above-mentioned pressing roller is off pressing roller.
11. according to the rolling equipment of the electrode material described in claim 5 or 6, it is characterised in that
Above-mentioned pressing roller has the mechanism moved up and down, so that it is pressed into above-mentioned electrode material intermittently.
12. according to the rolling equipment of the electrode material described in claim 5 or 6, it is characterised in that
Possessing the mechanism of the bending detecting above-mentioned electrode material, the bending corresponding to above-mentioned electrode material makes above-mentioned
Pressing roller moves at the width of above-mentioned electrode material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013098560A JP5390721B1 (en) | 2013-05-08 | 2013-05-08 | Roll press method and roll press equipment for electrode material |
| JP2013-098560 | 2013-05-08 |
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| CN104143628A CN104143628A (en) | 2014-11-12 |
| CN104143628B true CN104143628B (en) | 2016-08-17 |
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| CN201410190869.7A Active CN104143628B (en) | 2013-05-08 | 2014-05-07 | The rolling methods of electrode material and rolling equipment |
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| JP (1) | JP5390721B1 (en) |
| CN (1) | CN104143628B (en) |
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| WO2017204184A1 (en) | 2016-05-27 | 2017-11-30 | 三洋電機株式会社 | Method for producing secondary battery |
| JP6394664B2 (en) * | 2016-09-13 | 2018-09-26 | トヨタ自動車株式会社 | Electrode plate pressing device and electrode plate manufacturing method |
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| KR101885850B1 (en) * | 2017-03-31 | 2018-09-11 | (주)피엔티 | Apparatus for pressing electrode of secondary battery |
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| KR102187241B1 (en) * | 2018-05-30 | 2020-12-07 | (주)피엔티 | Apparatus for pressing electrode of secondary battery |
| CN110880580B (en) * | 2018-09-06 | 2021-05-04 | 宁德时代新能源科技股份有限公司 | Rolling device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5390721B1 (en) | 2014-01-15 |
| JP2014220113A (en) | 2014-11-20 |
| CN104143628A (en) | 2014-11-12 |
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