CN102357923B - Pole piece dividing and cutting die and coating production method of pole piece - Google Patents
Pole piece dividing and cutting die and coating production method of pole piece Download PDFInfo
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- CN102357923B CN102357923B CN2011102626938A CN201110262693A CN102357923B CN 102357923 B CN102357923 B CN 102357923B CN 2011102626938 A CN2011102626938 A CN 2011102626938A CN 201110262693 A CN201110262693 A CN 201110262693A CN 102357923 B CN102357923 B CN 102357923B
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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
Abstract
The invention relates to the field of lithium ion battery and discloses a pole piece dividing and cutting die and a coating production method of pole piece. The pole piece dividing and cutting die comprises a rubber plate, a first pole piece knife and a second pole piece knife, wherein the first pole piece knife and the second pole piece knife are fixedly embedded in the rubber plate; the knife edges of the first and second pole piece knifes are a first pole piece forming part and a second pole piece forming part of which the shapes are consistent with that of the pole piece to be divided and cut respectively; the first pole piece forming part and the second pole piece forming part are separated and horizontally arranged in parallel; a first tab forming part on the first pole piece forming part extends and protrudes on an end surface vertically opposite to the second pole piece forming part; a second tab forming part on the second pole piece forming part extends and protrudes on an end surface vertically opposite to the first pole piece forming part; and the first tab forming part and the second tab forming part are at least partially opposite to each other in the vertical direction. The dividing and cutting die is helpful in reducing waste of the cut metal foil.
Description
Technical field
The present invention relates to the lithium ion battery field, relate in particular to the coating flaking method of a kind of cutting die for pole piece slitting and pole piece.
Background technology
The coating film-making technique of producing at present flexible packing lithium ion electric core mainly contains following two kinds:
The first, shown in Figure 1, be coated with continuously on a coating wall scroll, centre position at this coating wall scroll width is formed with coating zone 101, be formed with two non-coating zones 102,103 on the both sides of this coating zone 101, this non-coating zone 102,103 specifically: thereby uncoated on the tinsel of this coating wall scroll have electrode material to make this tinsel leak outside.To coating wall scroll coating, dry,
After roller process, adopt cutting die for pole piece slitting to carry out pole piece to the coating wall scroll and cut, obtain two pole pieces thereby cut on the coating wall scroll of every predetermined length.
Adopt the cutting die of pole piece carving knife mouth-shaped shown in Figure 2 to carry out the principle schematic of pole piece 201 separating and cutting process shown in Figure 2.Cutting die for pole piece slitting of the prior art comprises offset plate 201 and is fixed on pole piece cutter on offset plate 201, and the edge of a knife of this two pole pieces cutter is as shown in the edge of a knife in Fig. 2 302,303.Use that it cuts to each pole piece comprise the pole piece body 302 that is coated with electrode material layer and uncoatedly electrode material arranged and tinsel exposes tab welding position 303.The end at pole piece body 302 is given prominence in these tab welding position 303 extensions.Carrying out pole piece when cutting, the afterbody of these two pole pieces lug body on the width of this section coating wall scroll is relative, and the tab welding position 303 on two pole pieces is respectively by non-coating zone 102,103 cuttings on this section coating wall scroll both sides and get.
The second, shown in Figure 5, be coated with continuously on a very wide coating wall scroll, be formed with a plurality of continuous coating zones 401,402 on this coating wall scroll, both sides at continuous coating zone 401 form non-coating zone 403,404, form non-coating zone 404,405 on the both sides of continuous coating zone 401; Then to this coating wall scroll along its longitudinal direction cut, coiled material, cut respectively and obtain a plurality of son coating wall scrolls as shown in Figure 1, as shown in Figure 1, the centre position of this this son coating wall scroll is formed with coating zone 101, is formed with two non-applying area 102,103 on the both sides of this coating zone 101.
Then to each examination paper coating wall scroll, adopt cutting die for pole piece slitting shown in Figure 2 to carry out pole piece to the coating wall scroll and cut, obtain two pole pieces thereby cut on the coating wall scroll of every predetermined length.Shown in Figure 3, cut each pole piece that obtains and comprise the pole piece body 302 that is coated with electrode material layer and uncoatedly electrode material arranged and tinsel exposes tab welding position 303.The end at pole piece body 302 is given prominence in these tab welding position 303 extensions.Carrying out pole piece when cutting, the afterbody of these two pole pieces lug body on the width of this cross-talk coating wall scroll is relative, and the tab welding position 303 on two pole pieces is respectively by non-applying area 102,103 cuttings on this cross-talk coating wall scroll both sides and get.
The inventor finds in carrying out research process of the present invention, the defective below the pole coating film-making technique of prior art exists:
Pole coating film-making mode of the prior art, all to adopt the tab welding position 303 of pole piece to be distributed in both sides, adopt the pole piece tail to carry out the cross cutting film-making to the arrangement mode of tail, the metal foil of being dismissed in pole piece film-making process is more, exists metal foil to expend too much defective.
And, the rise in price of the Copper Foil that uses along with flexible packing lithium ion electric core and the metal material of aluminium foil, above-mentioned defective has been brought huge cost pressure to lithium ion battery manufacturing enterprise.
Summary of the invention
The embodiment of the present invention provides the first purpose to be to provide: a kind of cutting die for pole piece slitting, divide to hit at pole coating and adopt this to cut the waste that cutting die is conducive to reduce cut tinsel.
The embodiment of the present invention provides the second purpose to be to provide: a kind of coating flaking method of pole piece, adopt this technical scheme to be conducive to reduce the waste of cut tinsel.
A kind of cutting die for pole piece slitting of a kind of cutting die for pole piece slitting that the embodiment of the present invention provides comprises offset plate, the first pole piece cutter, the second pole piece cutter, and described the first pole piece cutter, the second pole piece cutter is nested is fixed in described offset plate;
The edge of a knife of described the first pole piece cutter, the second pole piece cutter is respectively: the first pole piece forming part, the second pole piece forming part that shape is consistent with waiting to cut the pole piece that obtains;
Described the first pole piece forming part, the second pole piece forming part are separated from each other, give prominence to horizontal Tile the first surface at described offset plate;
The first lug position forming part on described the first pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the second pole piece forming part,
The second lug position forming part on described the second pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the first pole piece forming part,
Described the first lug position forming part, the second lug position forming part in vertical direction at least part of over against.
Alternatively, the first surface at described offset plate also is pasted with the first elastic layer, the second elastic layer
Described the first pole piece forming part is positioned at the periphery of described the first elastic layer,
The periphery that is positioned at described the first elastic layer that described the second pole piece forming part forms,
Under nature, described the first elastic layer, the second elastic layer at the height of described first surface all higher than described the first pole piece forming part and the second pole piece forming part.
Alternatively, also be pasted with the 3rd elastic layer at the first surface of described offset plate,
Described the 3rd elastic layer is formed on described the first pole piece forming part and the second pole piece forming part periphery,
Under nature, described the 3rd elastic layer at the height of described first surface higher than described the first pole piece forming part and the second pole piece forming part.
Alternatively, described the second lug position forming part being spaced apart to the first pole piece forming part: 1.25 millimeters ± 0.25 millimeter;
Described the first lug position forming part being spaced apart to the second pole piece forming part: 1.25 millimeters ± 0.25 millimeter.
Alternatively, described the first pole piece cutter and/or the second pole piece cutter are: the minute surface cutter.
The coating flaking method of a kind of pole piece that the embodiment of the present invention provides comprises:
The first applying area, the coating continuously respectively of the second applying area on coating wall scroll surface, be formed with on described coating wall scroll surface and be separated from each other and parallel the first coating zone, the second coating zone, be formed with non-coating zone between described the first coating zone, the second coating zone, described non-coating zone is the zone that tinsel exposes;
After the continuous coating in described coating wall scroll surface, dry described coating wall scroll;
The dry complete described coating wall scroll of roll-in coating;
Described coating wall scroll after roll-in passes through from the cross cutting zone of cutting die for pole piece slitting, regularly driving described cutting die for pole piece slitting moves to described coating wall scroll, cut respectively on the width of the described coating wall scroll of every predetermined length: the first pole piece, the second pole piece, after often cutting, described cutting die for pole piece slitting breaks away from described coating wall scroll and resets, wherein
Described cutting die for pole piece slitting comprises offset plate, the first pole piece cutter, described the first pole piece cutter of the second pole piece cutter, the second pole piece cutter is nested is fixed in described offset plate,
The edge of a knife of described the first pole piece cutter, the second pole piece cutter is respectively: the first pole piece forming part, the second pole piece forming part, described the first pole piece forming part, the second pole piece forming part are separated from each other, give prominence to horizontal Tile the first surface at described offset plate, the first lug position forming part on described the first pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the second pole piece forming part
The second lug position forming part on described the second pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the first pole piece forming part,
Described the first lug position forming part, the second lug position forming part in vertical direction part over against;
The shape of cutting each described first pole piece of obtaining, the second pole piece is identical with the shape of the first pole piece forming part, the second pole piece forming part on described cutting die for pole piece slitting respectively.
Alternatively, also be pasted with the first elastic layer, the second elastic layer at the first surface of described offset plate,
Described the first pole piece forming part is positioned at the periphery of described the first elastic layer,
The periphery that is positioned at described the first elastic layer that described the second pole piece forming part forms,
Under nature, described the first elastic layer, the second elastic layer at the height of described first surface all higher than described the first pole piece forming part and the second pole piece forming part.
Alternatively, also be pasted with the 3rd elastic layer at the first surface of described offset plate,
Described the 3rd elastic layer is formed on described the first pole piece forming part and the second pole piece forming part periphery,
Under nature, described the 3rd elastic layer at the height of described first surface higher than described the first pole piece forming part and the second pole piece forming part.
Alternatively, described the first lug position forming part being spaced apart to the second pole piece forming part: 1.25 millimeters ± 0.25 millimeter;
Described the second lug position forming part being spaced apart to the first pole piece forming part: 1.25 millimeters ± 0.25 millimeter.
Alternatively, described the first pole piece cutter and/or the second pole piece cutter are: the minute surface cutter.
Alternatively, the first applying area, the coating continuously respectively of the second applying area on coating wall scroll surface are formed with on described coating wall scroll surface and are separated from each other and parallel the first coating zone, the second coating zone, specifically:
In the first applying area, the respectively continuously coating of the second applying area of the first surface of coating wall scroll, be formed with described the first coating zone, the second coating zone at the first surface of described coating wall scroll,
After the continuous coating in described coating wall scroll surface, dry described coating wall scroll, specifically:
Dry described coating wall scroll, the first surface of described coating wall scroll is formed with described the first coating zone, the second coating zone;
The dry complete described coating wall scroll of roll-in coating, specifically:
The described coating wall scroll of roll-in, the first surface of described coating wall scroll is formed with described the first coating zone, the second coating zone.
Alternatively, the first applying area, the coating continuously respectively of the second applying area on coating wall scroll surface, be formed with on described coating wall scroll surface and be separated from each other and parallel the first coating zone, the second coating zone, be formed with non-coating zone between described the first coating zone, the second coating zone, described non-coating zone is the zone that tinsel exposes; After the continuous coating in described coating wall scroll surface, dry described coating wall scroll, specifically:
In the first applying area, the respectively continuously coating of the second applying area of the first surface of coating wall scroll, be formed with described the first coating zone, the second coating zone at the first surface of described coating wall scroll,
Dry described coating wall scroll, the first surface of described coating wall scroll is formed with described the first coating zone, the second coating zone,
In the first applying area, the respectively continuously coating of the second applying area of the second surface of coating wall scroll, be formed with described the first coating zone, the second coating zone at the second surface of described coating wall scroll,
Dry described coating wall scroll, the first surface of described coating wall scroll and second surface all are formed with described the first coating zone, the second coating zone;
The dry complete described coating wall scroll of roll-in coating, specifically:
The described coating wall scroll of roll-in, the first surface of described coating wall scroll and second surface all are formed with described the first coating zone, the second coating zone.
Therefore, use the technical scheme of the embodiment of the present invention, because the lug position forming part of two pole piece forming parts in the cutting die for pole piece slitting of the present embodiment is parallel in the horizontal direction, on perpendicular end surface relatively, and should extend outstanding lug position forming part in vertical direction part over against (as shown in Fig. 6,7).divide the cutting die of cutting that can adopt the present embodiment in cutting process at pole piece, can be to having on the coating wall scroll that is coated with processing of non-applying area in the middle of every two continuous coating zones, utilize the present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece, specifically cut out the pole piece body (being coated with electrode material on the metal foil surface) of this two pole piece at the continuous coating zone in the both sides of the non-applying area in centre, cut out two lug welding positions (metal foil exposes) in two pole pieces in non-applying area, namely be slightly larger than at a width tab welding section that cutting on the non-coating zone of tab welding bit length of corresponding pole piece obtains two pole pieces, divide incision technology with respect to the pole piece in pole coating pole piece of the prior art, utilize the present embodiment pole piece to cut the cutting waste that mould can greatly reduce tinsel, be conducive to save cost.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, does not consist of to improper restriction of the present invention, in the accompanying drawings:
Fig. 1 is a kind of coating principle schematic of the prior art;
Fig. 2 is that a kind of pole piece of the prior art is cut principle schematic;
Fig. 3 is that a kind of cutting die for pole piece slitting of the prior art is at the structural representation of edge of a knife end;
Fig. 4 is another kind of coating principle schematic of the prior art;
The side perspective structural representation of a kind of cutting die for pole piece slitting that Fig. 5 provides for the embodiment of the present invention 1;
Fig. 6 is the knife edge structure schematic diagram of cutting die for pole piece slitting shown in Figure 5 in the embodiment of the present invention 1;
The another kind that Fig. 7 provides for the embodiment of the present invention 1 is cut the knife edge structure schematic diagram of cutting die;
The pole coating film-making process flow diagram that Fig. 8 is coated with for a kind of single face that provides in the embodiment of the present invention 2;
The coating wall scroll surface texture schematic diagram of Fig. 9 for obtaining in coating process in the present embodiment 2,3;
Figure 10 divides the principle schematic that cuts out pole piece for what provide on the coating wall scroll that is provided with non-coating zone in the middle of two continuous coating zones in the present embodiment 2,3;
The pole coating film-making process flow diagram of a kind of double spread of providing in the embodiment of the present invention 3 is provided Figure 11.
The specific embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1:
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1:
The side perspective structural representation of a kind of cutting die for pole piece slitting that Fig. 5 provides for the present embodiment; Fig. 6 is the structural representation of the edge of a knife of cutting die for pole piece slitting shown in Figure 5.
Shown in Fig. 5,6, the cutting die for pole piece slitting that the present embodiment provides mainly comprises offset plate 501, the first pole piece cutter 502, the second pole piece cutter 503.The first pole piece cutter 502, the second pole piece cutter 503 is nested is fixed in described offset plate 501, and this offset plate 501 mainly works to fix the first pole piece cutter 502, the second pole piece cutter 503, and this second pole piece cutter 503, the second pole piece cutter 503 obtain pole piece for cutting.Due in the present embodiment, have a plurality of pole piece cuttves on this cutting die for pole piece slitting, thus can a plurality of pole pieces of once resecting, the shape of this pole piece is determined by the edge of a knife shape of pole piece cutter.
In the present embodiment, the edge of a knife of the first pole piece cutter 502 and the second pole piece cutter 503 is exposed at a surface of offset plate 501 outward, and the edge of a knife that this is outer is exposed at the edge of a knife of the first pole piece cutter 502 on offset plate 501 surfaces and the second pole piece cutter 503 is the pole piece shape of sealing.
In the present embodiment, with this first pole piece to the edge of a knife be designated as: the first pole piece forming part 601, can cut by it and obtain the first pole piece; With the second pole piece to the edge of a knife be designated as: the second pole piece forming part 602, can cut by it and obtain the second pole piece.
The first pole piece forming part 601, the second pole piece forming part 602 mutually have certain spacing distance and separate setting, and this first pole piece forming part 601, second pole piece forming part 602 integral body horizontal Tile setting on the horizontal direction of offset plate 501.And, on the first pole piece forming part 601, the first lug position forming part 6011 of being used for cutting out the tab welding position of pole piece is formed on: with the vertically opposite end face of the second pole piece forming part 602, on the second pole piece forming part 602, the second lug position forming part 6021 of being used for cutting out the tab welding position of pole piece is formed on: with the vertically opposite end face of the first pole piece forming part 601, that is: in vertical direction, the forming part position, lug position on this two pole pieces forming part is oppositely arranged on perpendicular end surface; The first lug position forming part 6011, the second lug position forming part 6021 horizontal parallel, and its in vertical direction part over against (as shown in Fig. 6,7).
In the manufacture craft of pole piece, after coating, dry, roller process, divide the cutting die of cutting that can adopt the present embodiment in cutting process at pole piece, can once cut and obtain two tab welding positions to two pole pieces of tab welding position.
Because the lug position forming part of two pole piece forming parts in the cutting die for pole piece slitting of the present embodiment is parallel in the horizontal direction, on perpendicular end surface relatively, and should extend outstanding lug position forming part in vertical direction part over against (as shown in Fig. 6,7).divide the cutting die of cutting that can adopt the present embodiment in cutting process at pole piece, can be to having on the coating wall scroll that is coated with processing of non-applying area in the middle of every two continuous coating zones, utilize the present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece, specifically cut out the pole piece body (being coated with electrode material on the metal foil surface) of this two pole piece at the continuous coating zone in the both sides of the non-applying area in centre, cut out two lug welding positions (metal foil exposes) in two pole pieces in non-applying area, namely be slightly larger than at a width tab welding section that cutting on the non-coating zone of tab welding bit length of corresponding pole piece obtains two pole pieces, divide incision technology with respect to the pole piece in pole coating pole piece of the prior art, utilize the present embodiment pole piece to cut the cutting waste that mould can greatly reduce tinsel, be conducive to save cost.
the inventor finds in process of the test of the present invention, carrying out the first above-mentioned pole piece cutter 502, during the arranging of the second pole piece cutter 503, make the interval of its first lug position forming part 6011 to second pole piece forming parts 602, and the interval L of the second lug position forming part 6021 to first pole piece forming parts 601 all is set to: 1.25 millimeters ± 0.25 millimeter for good, be about to this first pole piece cutter 502, the edge of a knife minimum distance L of the second pole piece cutter 503 is set to: 1.25 millimeters ± 0.25 millimeter for good, this arranges to control in exactness and material saving in the cutting technique essence and obtains equilibrium preferably, closely cause edge of a knife cutting that the utilization rate of as far as possible saving metal foil on the problem basis of deviation occurs avoiding crossing due to its spacing.
In an embodiment should, the first pole piece cutter 502 in this cutting die for pole piece slitting and/or the second pole piece cutter 503 can but be not limited to: the minute surface cutter.Adopt the minute surface cutter to make pole piece otch anodontia limit Paint Gloss.
In addition, in order further to improve the effect that pole piece is cut, can also further paste the first elastic layer 504, the second elastic layer 505 by first surface on the cutting die for pole piece slitting that the present embodiment provides.In the zone of the sealing proterties that the edge of a knife that makes the first elastic layer 504 be filled in the first pole piece cutter 502 forms, even the first pole piece forming part 601 is positioned at the periphery of the first elastic layer 504.In the zone of the sealing proterties that the edge of a knife that also makes the second elastic layer 505 be filled in the second pole piece cutter 503 forms, even the second pole piece forming part 602 is positioned at the periphery of the first elastic layer 504.
And, under nature, the first elastic layer 504, the second elastic layer 505 at first surface a little more than the first pole piece forming part 601, the second pole piece forming part 602, namely elastic layer 504,505 under the nature that is not subjected to External Force Acting a little more than the height of the first pole piece cutter 502 and the second pole piece cutter 503.
Usually the first pole piece cutter 502, the second pole piece cutter 503 are with high, and elastic layer 504,505 is arranged to high.
Like this, when off working state, this elastic layer of setting up 504,505 can be protected the edge of a knife part of the first pole piece cutter 502 and the second pole piece cutter 503, avoids the edge of a knife to sustain damage;
In the time of in working order, owing to also being pasted with this elastic layer 504,505 on offset plate 501 surfaces, carrying out pole piece when cutting, cutting die has the process of extruding to the coating wall scroll of slitting, cut complete and when driving offset plate 501 and leaving the coating wall scroll of slitting at the present segment pole piece, this extruded elastic layer 504,505 has external elasticity tension, this tension force acts on offset plate 501 and coating wall scroll, offset plate 501 and coating wall scroll are broken away from mutually more agile, avoid the phenomenon of bonding die occurs and affect the production efficiency that pole piece cuts and cut quality.
For the edge of a knife of further protecting the pole piece cutter and the elastic force that is increased in the pole piece cutting process; can also set up the 3rd elastic layer 506 at the first surface of offset plate 501; the 3rd elastic layer 506 is positioned at the periphery of the first pole piece forming part 601 and the second pole piece forming part 602, the first elastic layer 504, the second elastic layer 505 and the 3rd elastic layer 506 is covered on the first surface of offset plate 501 and the edge of a knife of the first pole piece cutter 502, the second pole piece cutter 503 is sunk into by elastic layer 504,505,506 inside and outside encirclements.
Wherein the first above-mentioned elastic layer 504, the second elastic layer 505, the 3rd elastic layer 506 can but be not limited to the sponge elastic layer or other have flexible material layer.
Embodiment 2:
Shown in Fig. 8,9,10, the present embodiment mainly describes with regard to using embodiment of the present invention method in the pole coating film-making technique of single face coating, and the pole coating film-making process flow process that the present embodiment provides mainly comprises the following steps:
Step 801: in the coating continuously respectively of the first applying area for the treatment of applied coating wall scroll surface, the second applying area, have predetermined interval between the first applying area, the second applying area.
Coating wall scroll in this step is shown in Figure 9.
This coating wall scroll is tinsel, and when making positive plate such as current needs, this coating wall scroll is aluminium foil, and the electrode slurry that is coated with on this coating wall scroll is that lithium compound is main positive electrode; When making negative plate as current needs, the coating wall scroll is copper foil, and the electrode slurry that is coated with on this coating wall scroll is carbon.
Certainly, this coating wall scroll can also be after new discovery can be used as other metal materials of affluxion body in lithium ion batteries.
Certainly, above-mentioned positive electrode and negative material both can be as mentioned above, newfound other materials after also can adopting.
Adopt coating machine, in collection liquid surface coating electrode material paste, make electrode material be coated on the surface of conductive carbon layer.
Coating in the present embodiment specifically can be adopted pole piece coating machine of the prior art, pass through transmission mechanism, collector to be coated is carried the slurry outlet of process coating machine, the place is provided with the gap that can supply the certain altitude of pole piece process at slurry outlet, can control the thickness that is coated on the electrode material on collector like this.
Control in the coating uniformity, can carry out discharging and be coated with inhomogeneity adjustment by slurry discharging adjusting parts are set at slurry outlet.Wherein so-called uniformity comprises the stability, uniformity of load and discharging opening discharging situation everywhere etc.
Can utilize the parts such as correcting device that smoothness and the accuracy of collector transmission are controlled in coating process, avoid the conveying generation deviation of collector, affect Painting effect and manufacturing schedule.
In the present embodiment.Can once divide at the width of a coating wall scroll and cut out two living pole pieces, can certainly divide and cut out two inconsistent pole pieces, but actual batch a large amount of production for the ease of lithium ion battery, great majority are set to once to divide and cut out two living pole pieces, in order to use in this batch, the present embodiment namely describes as example:
To be coated with the wall scroll width is divided into two, be divided into the two bar width of coating, form the first applying area, the second applying area, reserving the predetermined width inventor in the middle of the first applying area, the second applying area is carrying out finding in process of the test of the present invention, can set in the following way the width W reserved between the first applying area, the second applying area according to use in follow-up pole piece separating and cutting process cut the first pole piece cutter 502 in cutting die, the distance of the second pole piece cutter 503 is determined, its width equals the distance L in Fig. 6,7.
In actual set, the length of establishing the tab welding position on the pole piece that current need make is L, and the width W of reserving between the first applying area, the second applying area is set as: L+1mm is good.
can adopt in this step coating machine to carry out painting process, adopt transmission mechanism, drive coating wall scroll to be coated, make it through coating mechanism, after this this coating mechanism of coating wall scroll process, the electrode material of lithium ion battery is applied to the first applying area on the coating wall scroll, the second applying area, under the traction of coating wall scroll at connecting gear, during continuously by this coating mechanism, continuous band-shaped through being formed with on the coating wall scroll of coating mechanism, the surface is coated with the first coating zone 901 of electrode material, the second coating zone 902, this first coating zone 901, the width of the second coating zone 902 equals respectively the first applying area of original preset, the width of the second applying area, at the first coating zone 901, be formed with non-coating zone 903 between the second coating zone 902, electrodeless material coating layer on this non-coating zone 903 and tinsel exposes, the first applying area that the width of this non-coating zone 903 equals to be scheduled to, the width W of reserving between the second applying area.The non-coating zone 903 that this centre is reserved can be used as the zone that cuts out of tab welding position when pole piece is cut.Specifically can be referring to the detailed description in step 804.
Coating in the present embodiment can but be not limited to be coated with wall scroll by adjustment and control the thickness that is coated on the electrode material on the coating wall scroll by the height in the gap, slurry outlet place located.
Control in the coating uniformity, can also regulate parts and carry out discharging and be coated with inhomogeneity adjustment by by the slurry outlet place that locates, the slurry discharging being set at the coating wall scroll.Wherein so-called uniformity comprises the stability, uniformity of load and discharging opening discharging situation everywhere etc.
In coating process can but be not limited to utilize the parts such as correcting device that smoothness and the accuracy of collector transmission are controlled, avoid the conveying generation deviation of collector, affect Painting effect and manufacturing schedule.
Step 802: drying.
After coating process, the coating wall scroll after coating is admitted under the transmission of haulage gear through drying chamber or dryer, carries out stoving process and processes.Electrode material on the coating wall scroll that super-dry is processed becomes the solid-state of drying by moistening slurry form, thereby fixedly covers the surface of tinsel.
Bake out temperature in the present embodiment can but be not limited to be set as: be equal to or less than the temperature range of 130 degrees centigrade, namely 80 ℃ more than or equal to 80 degrees centigrade--130 ℃.
Step 803: the dry complete coating wall scroll of roll-in coating.
To process through super-dry, the electrode material coat is with the solid-state wall scroll of coating that covers on tinsel, adopt draw-gear, make this coating wall scroll that has been coated with carry out roller process, the effect that is stressed with the electrode coat that further makes on the tinsel surface, be fixed on more firmly, more equably the surface of tinsel: specifically can but be not limited to make this coating wall scroll that has been coated with through between two counter-rotational running rollers, this two running roller carries out roller process to the coating wall scroll that has been coated with of process.
Step 804: adopt the special cutting die for pole piece slitting of the present embodiment to cut pole piece.
The cutting die for pole piece slitting that uses in the present embodiment is record in embodiment 1.Its structure can be referring to shown in Fig. 5,6,7.
adopt the pole piece cutting apparatus, under the effect of tractive force, make through the coating wall scroll of roll-in and pass through from the cross cutting zone of cutting die for pole piece slitting, can control transmission stepping stroke and the step frequency of coating wall scroll in minute cutting process, regional by in process at the cross cutting of cutting cutting die of the present embodiment at the coating wall scroll, by cylinder or other power set, drive the offset plate 501 on cutting die for pole piece slitting, make offset plate 501 together with nested the first pole piece cutter 502 that is fixed in offset plate 501, the second pole piece cutter 503 jointly to over against the at the uniform velocity directed movement of coating wall scroll, cut the first pole piece cutter 502 on cutting die surface, the edge of a knife of the second pole piece cutter 503 acts on the coating wall scroll, cutting on the coating wall scroll of current this section obtains two pole pieces: the first pole piece, the second pole piece.
The shape of this first pole piece 1001, the second pole piece 1002 is consistent by the edge of a knife shape of the edge of a knife shape of the first pole piece cutter 502 on the cutting die of the present embodiment, the second pole piece cutter 503.
Figure 10 is for dividing the principle schematic that cuts out pole piece at the present embodiment on the coating wall scroll that is provided with non-coating zone 903 in the middle of two continuous coating zones, as seen from Figure 10, the tab welding position of the first pole piece 1001 that obtains at the width of the coating wall scroll of every section slitting, the second pole piece 1002 is over against staggered, goes out in slitting on a common non-coating zone 903.
Shown in Figure 10, the pole piece body of the first pole piece 1001 minute cuts out in the first coating zone 901, and the non-coating zone of tab welding position 10011 in the centre of the first pole piece cut out in 903 minutes; The pole piece body of the second pole piece 1002 minute cuts out in the second coating zone 902, and the non-coating zone of tab welding position 10021 in the centre of the second pole piece 1002 cut out in 903 minutes.
When cut complete after, under the effect of cylinder or other power, cutting die for pole piece slitting is mentioned, leave cut coating wall scroll, the coating wall scroll is under the effect of tractive force, continue stepping, stop after stepping to predetermined stroke, drive cutting die for pole piece slitting at this moment to the coating wall scroll to the motion of coating wall scroll, again divide to cut out the first pole piece, the second pole piece 1002 on this section coating wall scroll, so repeatedly, until should be cut complete fully through the coating wall scroll of roll-in.
Because the lug position forming part 6011,6021 of the pole piece forming part of the first pole piece cutter 502 in the cutting die for pole piece slitting of the present embodiment, the second pole piece cutter 503 is parallel in the horizontal direction, on perpendicular end surface relatively, and should extend outstanding lug position forming part 6011,6021 in vertical direction part over against (as shown in Fig. 6,7).
in dividing cutting process, this step pole piece cuts pole piece, to having on the coating wall scroll that is coated with processing of non-applying area in the middle of every two continuous coating zones, utilize the present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece, specifically cut out the pole piece body (being coated with electrode material on the metal foil surface) of this two pole piece at the continuous coating zone in the both sides of the non-applying area in centre, cut out two lug welding positions 10011 in two pole pieces in non-applying area, 10021 (metal foil exposes), namely be slightly larger than the tab welding position 10011 of corresponding pole piece at a width, on the non-coating zone 903 of 10021 length, cutting obtains the tab welding section of two pole pieces, divide incision technology with respect to the pole piece in pole coating pole piece of the prior art, utilize the present embodiment pole piece to cut the cutting waste that mould can greatly reduce tinsel, be conducive to save cost.
In addition, in order further to improve the quality that in the present embodiment flow process, pole piece divides cutting process, can also be as described in Example 1, first surface is further pasted the first elastic layer 504, the second elastic layer 505 on the cutting die for pole piece slitting that the present embodiment provides.In the zone of the sealing proterties that the edge of a knife that makes the first elastic layer 504 be filled in the first pole piece cutter 502 forms, even the first pole piece forming part 601 is positioned at the periphery of the first elastic layer 504.In the zone of the sealing proterties that the edge of a knife that also makes the second elastic layer 505 be filled in the second pole piece cutter 503 forms, even the second pole piece forming part 602 is positioned at the periphery of the first elastic layer 504.
And, under nature, the first elastic layer 504, the second elastic layer 505 at first surface a little more than the first pole piece forming part 601, the second pole piece forming part 602, namely elastic layer 504,505 under the nature that is not subjected to External Force Acting a little more than the height of the first pole piece cutter 502 and the second pole piece cutter 503.
Usually the first pole piece cutter 502, the second pole piece cutter 503 are with high, and elastic layer 504,505 is arranged to high.
Like this, when off working state, this elastic layer of setting up 504,505 can be protected the edge of a knife part of the first pole piece cutter 502 and the second pole piece cutter 503, avoids the edge of a knife to sustain damage;
In the time of in working order, owing to also being pasted with this elastic layer 504,505 on offset plate 501 surfaces, carrying out pole piece when cutting, cutting die has the process of extruding to the coating wall scroll of slitting, cut complete and when driving offset plate 501 and leaving the coating wall scroll of slitting at the present segment pole piece, this extruded elastic layer 504,505 has external elasticity tension, this tension force acts on offset plate 501 and coating wall scroll, offset plate 501 and coating wall scroll are broken away from mutually more agile, avoid the phenomenon of bonding die occurs and affect the production efficiency that pole piece cuts and cut quality.
For the edge of a knife of further protecting the pole piece cutter and the elastic force that is increased in the pole piece cutting process; can also set up the 3rd elastic layer 506 at the first surface of offset plate 501; the 3rd elastic layer 506 is positioned at the periphery of the first pole piece forming part 601 and the second pole piece forming part 602, the first elastic layer 504, the second elastic layer 505 and the 3rd elastic layer 506 is covered on the first surface of offset plate 501 and the edge of a knife of the first pole piece cutter 502, the second pole piece cutter 503 is sunk into by elastic layer 504,505,506 inside and outside encirclements.
Wherein the first above-mentioned elastic layer 504, the second elastic layer 505, the 3rd elastic layer 506 can but be not limited to the sponge elastic layer or other have flexible material layer.
Embodiment 3:
Shown in Figure 10,11, the present embodiment mainly describes with regard to using embodiment of the present invention method in the pole coating film-making technique of double spread, and the pole coating film-making process flow process that the present embodiment provides mainly comprises the following steps:
Step 1101: in the coating continuously respectively of the first applying area for the treatment of applied coating wall scroll surface, the second applying area, have predetermined interval between the first applying area, the second applying area.
This step can but be not limited to referring to the record in the step 701 in embodiment 2.
Step 1102: drying.
Make the wall scroll of coating that carries out in step 1101 after coated on one side be conveyed into drying chamber or baking oven after coating, carrying out drying processes, electrode material on the coating wall scroll that super-dry is processed becomes the solid-state of drying by moistening slurry form, thereby fixedly covers the surface of tinsel.
Concrete dry treatment process can be referring to step 1102 in embodiment 2.
Step 1103: the coating wall scroll after step 1102 is processed advanced coating machine again, was coated with on coating wall scroll another surface.
Identical in coating in this step and step 1101, only applied face has changed another surface of this coating wall scroll into.
Coating is after wall scroll passes through the coating mechanism of coating machine in this step again, all is coated with electrode material from two surfaces of coating mechanism coating wall scroll out.The applying structure of this coating wall scroll positive and negative all as shown in Figure 9.
Step 1104: drying.
Make the wall scroll of coating that carries out in step 1103 after double spread be conveyed into drying chamber or baking oven after coating, carrying out drying processes, electrode material on the coating wall scroll that super-dry is processed becomes the solid-state of drying by moistening slurry form, thereby fixedly covers the surface of tinsel.
Concrete dry treatment process can be referring to step 1102 in embodiment 2.
Step 1105: roll-in has been coated with dry complete coating wall scroll.
The principle of this step and operation can but be not limited to record referring to step 703 in embodiment 2.Again do not give unnecessary details.
Step 1106: adopt the special cutting die for pole piece slitting of the present embodiment to cut pole piece.
Concrete pole piece separating and cutting process in this step is identical with step 704 in embodiment 2, institute's difference only is that the positive and negative of the coating wall scroll of slitting is provided with the first coating zone, the second coating zone and middle non-coating zone in the present embodiment, is the pole piece of double spread therefore cut the pole piece that obtains.It cuts principle can be shown in Figure 10.
With beneficial effect in embodiment 2 in like manner, in the present embodiment, because the lug position forming part of the pole piece forming part of the first pole piece cutter 502 in cutting die for pole piece slitting, the second pole piece cutter is parallel in the horizontal direction, on perpendicular end surface relatively, and should extend outstanding lug position forming part in vertical direction part over against (as shown in Fig. 6,7).in dividing cutting process, this step pole piece cuts pole piece, to having on the coating wall scroll that is coated with processing of non-applying area in the middle of every two continuous coating zones, utilize the present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece, specifically cut out the pole piece body (being coated with electrode material on the metal foil surface) of this two pole piece at the continuous coating zone in the both sides of the non-applying area in centre, cut out two lug welding positions (metal foil exposes) in two pole pieces in non-applying area, namely be slightly larger than at a width tab welding section that cutting on the non-coating zone of tab welding bit length of corresponding pole piece obtains two pole pieces, divide incision technology with respect to the pole piece in pole coating pole piece of the prior art, utilize the present embodiment pole piece to cut the cutting waste that mould can greatly reduce tinsel, be conducive to save cost.
Data Comparison Analysis:
The embodiment of the present invention:Adopt the cutting die for pole piece slitting shown in Fig. 5,6 in the present invention, adopt the technological process shown in embodiment 2,3 to carry out the pole coating film-making, make a * * 3496-20C-2200mAh lithium-ion electric core, use therein positive plate length is 88mm, and negative plate length is 89mm.
Comparative Examples:Adopt cutting die for pole piece slitting shown in Figure 2 in prior art, adopt the coating cutting technique shown in Fig. 1,3 to make the lithium-ion electric core of a same size, positive plate length is 88mm, and negative plate length is 89mm.
In the pole piece separating and cutting process, the positive pole aluminium foil width that need adopt in embodiments of the present invention is:
Positive plate length (88mm)+0.5mm) * 2+ tab welding position height (15mm)+1mm+ die-cutting machine both sides pinch roller width (10mm)=203mm.
Adopt the negative copper foil width to be:
Negative plate length (89mm)+0.5mm) * 2+ tab welding position height (15mm)+1mm+ die-cutting machine both sides pinch roller width (10mm)=205mm.
In the pole piece separating and cutting process, adopt prior art need adopt the positive pole aluminium foil width to be:
Positive plate length (88mm) * 2+1mm+ tab welding position height (15mm) * 2+ die-cutting machine both sides pinch roller width (10mm)=217mm;
Negative pole copper width is: negative plate length (89mm) * 2+1mm+ tab welding position height (15mm) * 2+ die-cutting machine both sides pinch roller width (10mm)=219mm.
By upper contrast test comparing as seen, existing for prior art, adopt embodiment of the present invention method can relatively save tinsel material 6.42%, can obviously greatly save cost.
The above technical scheme that the embodiment of the present invention is provided is described in detail, used specific case herein principle and the embodiment of the embodiment of the present invention are set forth, the explanation of above embodiment is only applicable to help to understand the principle of the embodiment of the present invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the present invention, all will change on the specific embodiment and range of application, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. a cutting die for pole piece slitting, is characterized in that, comprises offset plate, the first pole piece cutter, the second pole piece cutter, and described the first pole piece cutter, the second pole piece cutter is nested is fixed in described offset plate;
The edge of a knife of described the first pole piece cutter, the second pole piece cutter is respectively: the first pole piece forming part, the second pole piece forming part that shape is consistent with waiting to cut the pole piece that obtains;
Described the first pole piece forming part, the second pole piece forming part are separated from each other, give prominence to horizontal Tile the first surface at described offset plate;
The first lug position forming part on described the first pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the second pole piece forming part, the second lug position forming part on described the second pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the first pole piece forming part
Described the first lug position forming part, the second lug position forming part in vertical direction at least part of over against.
2. cutting die for pole piece slitting according to claim 1, is characterized in that,
First surface at described offset plate also is pasted with the first elastic layer, the second elastic layer;
Described the first pole piece forming part is positioned at the periphery of described the first elastic layer,
Described the second pole piece forming part is positioned at the periphery of described the second elastic layer,
Under nature, described the first elastic layer, the second elastic layer at the height of described first surface all higher than the height of described the first pole piece forming part and described the second pole piece forming part.
3. cutting die for pole piece slitting according to claim 2, is characterized in that,
First surface at described offset plate also is pasted with the 3rd elastic layer,
Described the 3rd elastic layer is formed on described the first pole piece forming part and the second pole piece forming part periphery,
Under nature, described the 3rd elastic layer at the height of described first surface higher than described the first pole piece forming part and the second pole piece forming part.
4. cutting die for pole piece slitting according to claim 1 and 2, is characterized in that,
Described the second lug position forming part being spaced apart to the first pole piece forming part: 1.25 millimeters ± 0.25 millimeter;
Described the first lug position forming part being spaced apart to the second pole piece forming part: 1.25 millimeters ± 0.25 millimeter.
5. cutting die for pole piece slitting according to claim 1 and 2, is characterized in that,
Described the first pole piece cutter and/or the second pole piece cutter are: the minute surface cutter.
6. the coating flaking method of a pole piece, is characterized in that, comprising:
The first applying area, the coating continuously respectively of the second applying area on coating wall scroll surface, be formed with on described coating wall scroll surface and be separated from each other and parallel the first coating zone, the second coating zone, be formed with non-coating zone between described the first coating zone, the second coating zone, described non-coating zone is the zone that tinsel exposes;
After the continuous coating in described coating wall scroll surface, dry described coating wall scroll;
The dry complete described coating wall scroll of roll-in coating;
described coating wall scroll after roll-in passes through from the cross cutting zone of cutting die for pole piece slitting, regularly driving described cutting die for pole piece slitting moves to described coating wall scroll, cut respectively on the width of the described coating wall scroll of every predetermined length: the first pole piece, the second pole piece, after often cutting, described cutting die for pole piece slitting breaks away from described coating wall scroll and resets, wherein, described cutting die for pole piece slitting comprises offset plate, the first pole piece cutter, the second pole piece cutter, described the first pole piece cutter, the second pole piece cutter is nested to be fixed in described offset plate
The edge of a knife of described the first pole piece cutter, the second pole piece cutter is respectively: the first pole piece forming part, the second pole piece forming part, described the first pole piece forming part, the second pole piece forming part are separated from each other, give prominence to horizontal Tile the first surface at described offset plate, the first lug position forming part on described the first pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the second pole piece forming part
The second lug position forming part on described the second pole piece forming part is extended and is given prominence to: with the vertically opposite end of described the first pole piece forming part, described the first lug position forming part, the second lug position forming part in vertical direction part over against;
The shape of cutting each described first pole piece of obtaining, the second pole piece is identical with the shape of the first pole piece forming part, the second pole piece forming part on described cutting die for pole piece slitting respectively.
7. the coating flaking method of pole piece according to claim 6, is characterized in that,
First surface at described offset plate also is pasted with the first elastic layer, the second elastic layer;
Described the first pole piece forming part is positioned at the periphery of described the first elastic layer,
Described the second pole piece forming part is positioned at the periphery of described the second elastic layer,
Under nature, described the first elastic layer, the second elastic layer at the height of described first surface all higher than the height of described the first pole piece forming part and described the second pole piece forming part.
8. the coating flaking method of a kind of pole piece according to claim 7, is characterized in that,
First surface at described offset plate also is pasted with the 3rd elastic layer, and described the 3rd elastic layer is formed on described the first pole piece forming part and the second pole piece forming part periphery,
Under nature, described the 3rd elastic layer at the height of described first surface higher than described the first pole piece forming part and the second pole piece forming part.
9. the coating flaking method of according to claim 6 or 7 described pole pieces, is characterized in that,
Described the first lug position forming part being spaced apart to the second pole piece forming part: 1.25 millimeters ± 0.25 millimeter;
Described the second lug position forming part being spaced apart to the first pole piece forming part: 1.25 millimeters ± 0.25 millimeter.
10. the coating flaking method of according to claim 6 or 7 described pole pieces, is characterized in that,
Described the first pole piece cutter and/or the second pole piece cutter are: the minute surface cutter.
11. the coating flaking method of according to claim 6 or 7 pole pieces of stating is characterized in that,
The first applying area, the coating continuously respectively of the second applying area on coating wall scroll surface are formed with on described coating wall scroll surface and are separated from each other and parallel the first coating zone, the second coating zone, specifically:
In the first applying area, the respectively continuously coating of the second applying area of the first surface of coating wall scroll, be formed with described the first coating zone, the second coating zone at the first surface of described coating wall scroll,
After the continuous coating in described coating wall scroll surface, dry described coating wall scroll, specifically:
Dry described coating wall scroll, the first surface of described coating wall scroll is formed with described the first coating zone, the second coating zone;
The dry complete described coating wall scroll of roll-in coating, specifically:
The described coating wall scroll of roll-in, the first surface of described coating wall scroll is formed with described the first coating zone, the second coating zone.
12. the coating flaking method of according to claim 6 or 7 described pole pieces is characterized in that,
The first applying area, the coating continuously respectively of the second applying area on coating wall scroll surface, be formed with on described coating wall scroll surface and be separated from each other and parallel the first coating zone, the second coating zone, be formed with non-coating zone between described the first coating zone, the second coating zone, described non-coating zone is the zone that tinsel exposes; After the continuous coating in described coating wall scroll surface, dry described coating wall scroll, specifically:
In the first applying area, the respectively continuously coating of the second applying area of the first surface of coating wall scroll, be formed with described the first coating zone, the second coating zone at the first surface of described coating wall scroll,
Dry described coating wall scroll, the first surface of described coating wall scroll is formed with described the first coating zone, the second coating zone,
In the first applying area, the respectively continuously coating of the second applying area of the second surface of coating wall scroll, be formed with described the first coating zone, the second coating zone at the second surface of described coating wall scroll,
Dry described coating wall scroll, the first surface of described coating wall scroll and second surface all are formed with described the first coating zone, the second coating zone;
The dry complete described coating wall scroll of roll-in coating, specifically:
The described coating wall scroll of roll-in, the first surface of described coating wall scroll and second surface all are formed with described the first coating zone, the second coating zone.
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| CN2011102626938A CN102357923B (en) | 2011-09-06 | 2011-09-06 | Pole piece dividing and cutting die and coating production method of pole piece |
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| CN106207079B (en) * | 2016-07-06 | 2019-08-23 | 广东亿鑫丰智能装备股份有限公司 | Battery pole piece die-cutting mould and its die cutting method |
| CN110199410B (en) * | 2017-01-24 | 2022-09-27 | 三洋电机株式会社 | Method for manufacturing electrode plate for battery, method for manufacturing battery, and battery |
| CN110137427B (en) * | 2018-02-08 | 2022-03-11 | 中天储能科技有限公司 | Preparation method of multi-stage battery pole piece |
| CN110071258A (en) * | 2019-04-23 | 2019-07-30 | 苏州新中能源科技有限公司 | A kind of efficient tablet making technology of battery pole piece |
| CN110911627B (en) * | 2019-10-25 | 2022-03-11 | 合肥国轩高科动力能源有限公司 | Method for forming tab of intermittent coating type battery pole piece |
| CN112670435A (en) * | 2020-12-17 | 2021-04-16 | 惠州市豪鹏科技有限公司 | Preparation method of battery pole piece |
| CN115870560B (en) * | 2022-12-30 | 2024-01-26 | 重庆太蓝新能源有限公司 | Cutting mechanism and packaging method |
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| US20040255741A1 (en) * | 2003-06-23 | 2004-12-23 | Deng Guo Rui | Metal die cutting apparatus and method of forming same |
| CN201523036U (en) * | 2009-10-14 | 2010-07-07 | 天津力神电池股份有限公司 | Lithium ion battery pole piece cutting tool |
| CN201930910U (en) * | 2010-12-06 | 2011-08-17 | 华明电源(深圳)有限公司 | Powder coating machine of cathode piece of lithium ion battery |
| CN201931150U (en) * | 2010-12-16 | 2011-08-17 | 邢台纳科诺尔极片轧制设备有限公司 | Battery pole piece cutting device |
| CN202241463U (en) * | 2011-09-06 | 2012-05-30 | 深圳市格瑞普电池有限公司 | Cutting die for pole piece slitting |
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