CN202241463U - Cutting die for pole piece slitting - Google Patents
Cutting die for pole piece slitting Download PDFInfo
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- CN202241463U CN202241463U CN2011203330170U CN201120333017U CN202241463U CN 202241463 U CN202241463 U CN 202241463U CN 2011203330170 U CN2011203330170 U CN 2011203330170U CN 201120333017 U CN201120333017 U CN 201120333017U CN 202241463 U CN202241463 U CN 202241463U
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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 utility model relates to the field of lithium ion batteries, and discloses a cutting die for pole piece slitting. The cutting die for pole piece slitting comprises a rubber plate, a first pole piece blade and a second pole piece blade, wherein the first pole blade and the second pole piece blade are nested and fixed in the rubber plate; the edges of the first pole piece blade and the second pole piece blade are respectively a first pole piece forming part and a second pole piece forming part with the shape consistent to that of the pole pieces, the first pole piece forming part and the second pole piece forming part are separated from each other and are arranged side by side; a first pole lug position forming part on the first pole piece forming part extends and protrudes on the end surface vertically opposite to the second pole piece forming part, a second pole lug position forming part on the second pole piece forming part extends and protrudes on the end surface vertically opposite to the first pole piece forming part, and the first pole lug position forming part and the second pole lug position forming part are at least right opposite to each part partially in the vertical direction. By adopting the cutting die for slitting in pole piece coating and slitting, the reduction of waste of removed metal foil is facilitated.
Description
Technical field
The utility model relates to the lithium ion battery field, relates in particular to a kind of pole piece and cuts cutting die.
Background technology
The coating film-making technology of producing flexible packing lithium ion electric core at present mainly contains following two kinds:
First kind; Referring to shown in Figure 1; On a coating wall scroll, be coated with continuously; Centre position at this coating wall scroll width is formed with coating zone 101, is 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.After to coating wall scroll coating, dry, roller process, adopt pole piece to cut cutting die and the coating wall scroll is carried out pole piece cut, obtain two pole pieces thereby on the coating wall scroll of every predetermined length, cut.
Adopt principle schematic that the cutting die of pole piece carving knife degree of lip-rounding shape shown in Figure 2 carries out the pole piece separating and cutting process referring to shown in Figure 2.Pole piece of the prior art is cut cutting die and is comprised offset plate 201 and be fixed on the pole piece cutter on the offset plate 201 that the edge of a knife of this two pole pieces cutter is like the edge of a knife among Fig. 2 202, shown in 203.Referring to shown in Figure 3, use it and cut each pole piece that obtains and comprise the pole piece body 302 that is coated with electrode material layer and uncoatedly electrode material is arranged and lug welding position 303 that tinsel exposes.The end at pole piece body 302 is given prominence in these lug welding position 303 extensions.Carrying out pole piece when cutting, cut the afterbody of two pole pieces lug body on the width of this section coating wall scroll relative, the lug 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.
Second kind; Referring to shown in Figure 4; On a very wide coating wall scroll, be coated with continuously; On this coating wall scroll, be formed with a plurality of continuous coating zones 401,402, form non-coating zone 403,404, form non-coating zone 404,405 on the both sides of continuous coating zone 401 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 as shown in Figure 1 coating wall scrolls; 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, adopts pole piece shown in Figure 2 to cut cutting die and carry out pole piece and cut being coated with wall scroll, obtain two pole pieces thereby on the coating wall scroll of every predetermined length, cut.Referring to 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 is arranged and lug welding position 303 that tinsel exposes.The end at pole piece body 302 is given prominence in these lug 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 lug welding position 303 on two pole pieces is respectively by non-applying area 102,103 cuttings on these cross-talk coating wall scroll both sides and get.
The utility model people finds in carrying out the utility model research process, the defective below the pole piece coating film-making technology of prior art exists:
Pole piece coating film-making mode of the prior art; All be to adopt the lug welding position 303 of pole piece to be distributed in both sides; Adopt the pole piece tail that the arrangement mode of tail is carried out the cross cutting film-making, the metal foil of in pole piece film-making process, being dismissed is more, exists metal foil to expend too much defective.
And along with the rise in price of the metal material of employed Copper Foil of flexible packing lithium ion electric core and aluminium foil, above-mentioned defective has brought huge cost pressure for lithium ion battery manufacturing enterprise.
The utility model content
The utility model embodiment provides first purpose to be to provide: a kind of pole piece is cut cutting die, divides to hit in the pole piece coating and adopts this to cut cutting die, helps reducing the waste of the tinsel that is excised.
A kind of pole piece that the utility model embodiment provides is cut cutting die, comprises offset plate, the first pole piece cutter, the second pole piece cutter, and the said first pole piece cutter, the second pole piece cutter is nested is fixed in the said offset plate;
The edge of a knife of the said first pole piece cutter, the second pole piece cutter is respectively: shape with wait to cut the consistent first pole piece forming part, the second pole piece forming part of pole piece that obtains;
The said 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 said offset plate;
The first lug position forming part extension on the said first pole piece forming part is given prominence to: with the vertically opposite end of the said second pole piece forming part,
The second lug position forming part extension on the said second pole piece forming part is given prominence to: with the vertically opposite end of the said first pole piece forming part,
The said first lug position forming part, the second lug position forming part in vertical direction at least the part over against.
Alternatively, the first surface at said offset plate also is pasted with first elastic layer, second elastic layer;
The said first pole piece forming part is positioned at the periphery of said first elastic layer,
The periphery that is positioned at said first elastic layer that the said second pole piece forming part forms,
Said the 3rd elastic layer is positioned at the periphery of the said first pole piece forming part and the second pole piece forming part;
Under nature, said first elastic layer, second elastic layer all are higher than the height of the said second pole piece forming part of the said first pole piece forming part at the height of said first surface.
Alternatively, also be pasted with the 3rd elastic layer at the first surface of said offset plate,
Said the 3rd elastic layer is positioned at the periphery of the said first pole piece forming part and the second pole piece forming part;
Under nature, said the 3rd elastic layer is higher than the height of the said second pole piece forming part of the said first pole piece forming part at the height of said first surface.
Alternatively, the said second lug position forming part being spaced apart: 1.25 millimeters ± 0.25 millimeter to the said first pole piece forming part.
Alternatively, the said first lug position forming part being spaced apart: 1.25 millimeters ± 0.25 millimeter to the second pole piece forming part.
Alternatively, the said first pole piece cutter or the second pole piece cutter are: the minute surface cutter.
Alternatively, the said first pole piece cutter and the second pole piece cutter are: the minute surface cutter.
Therefore; Use the technical scheme of the utility model embodiment; Because cut the lug position forming part of two pole piece forming parts in the cutting die at the pole piece of present embodiment parallel in the horizontal direction; Relative on perpendicular end surface, and should extend outstanding lug position forming part in vertical direction partly over against (like Fig. 6, shown in 7).Divide the cutting die of cutting that can adopt present embodiment in the cutting process at pole piece; On can coating wall scroll to the coated that has non-applying area in the middle of per two continuous coating zones; Utilize present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece; Specifically the continuous coating zone in the both sides of non-applying area cuts out the pole piece body (being covered with electrode material in the metal foil surfaces coated) of this two pole piece in the centre; In non-applying area, cut out the two lugs welding positions (metal foil exposes) in two pole pieces; Promptly be slightly larger than the lug weld part that cutting on the non-coating zone of lug welding bit length of corresponding pole piece obtains two pole pieces at a width; Pole piece with respect in the pole piece coating pole piece of the prior art divides incision technology, utilizes the present embodiment pole piece to cut the cutting waste that mould can significantly reduce tinsel, helps practicing thrift cost.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, does not constitute the improper qualification to the utility model, in the accompanying drawings:
Fig. 1 is a kind of coating principle schematic of the prior art;
Fig. 2 cuts principle schematic for a kind of pole piece of the prior art;
Fig. 3 cuts the structural representation of cutting die at edge of a knife end for a kind of pole piece of the prior art;
Fig. 4 is an another kind of coating principle schematic of the prior art;
A kind of pole piece that Fig. 5 provides for the utility model embodiment 1 is cut cutting die side perspective structural representation when being in off working state;
Fig. 6 cuts the edge of a knife structural representation of cutting die for pole piece shown in Figure 5 among the utility model embodiment 1;
The another kind that Fig. 7 provides for the utility model embodiment 1 is cut the edge of a knife structural representation of cutting die;
The pole piece coating film-making process flow diagram that Fig. 8 is coated with for a kind of single face that provides among the utility model embodiment 2;
The coating wall scroll surface texture sketch map of Fig. 9 in present embodiment 2,3, in coating process, obtaining;
Figure 10 divides the principle schematic that cuts out pole piece for what in present embodiment 2,3, provide on the coating wall scroll that is provided with non-coating zone in the middle of the two continuous coating zones;
Figure 11 is the pole piece coating film-making process flow diagram of a kind of double spread of providing among the utility model embodiment 3.
The specific embodiment
To combine accompanying drawing and specific embodiment to specify the utility model below, be used for explaining the utility model in the illustrative examples and the explanation of this utility model, but not as the qualification to the utility model.
Embodiment 1:
A kind of pole piece that Fig. 5 provides for present embodiment is cut the side perspective structural representation of cutting die; Fig. 6 is the structural representation that pole piece shown in Figure 5 is cut the edge of a knife of cutting die.
Referring to Fig. 5, shown in 6, the pole piece that present embodiment provides is cut cutting die and is mainly comprised 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 nested being fixed in the said offset plate 501, this offset plate 501 mainly work 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 are used to cut and obtain pole piece.Because in the present embodiment, this pole piece is cut has a plurality of pole piece cuttves on the cutting die, thus can a plurality of pole pieces of once resecting, and 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 of the edge of a knife and the second pole piece cutter 503 that this is outer to be exposed at the first pole piece cutter 502 on offset plate 501 surfaces 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 through it and to obtain first pole piece; With second pole piece to the edge of a knife be designated as: the second pole piece forming part 602, can cut through it and to obtain second pole piece.
The first pole piece forming part 601, the second pole piece forming part 602 have certain spacing distance each other and separate setting, and this first pole piece forming part 601, the horizontal Tile setting on the horizontal direction of offset plate 501 of the second pole piece forming part, 602 integral body.And; On the first pole piece forming part 601, the first lug position forming part 6011 that is used to cut out the lug 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 that is used to cut out the lug 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, second lug position forming part 6021 horizontal parallel, and its in vertical direction part over against (like Fig. 6, shown in 7).
In the manufacture craft of pole piece, after coating, drying, roller process, divide the cutting die of cutting that can adopt present embodiment in the cutting process at pole piece, can once cut and obtain two pole pieces of two lugs welding positions lug welding position.
Owing to the lug position forming part of cutting two pole piece forming parts in the cutting die at the pole piece of present embodiment is parallel in the horizontal direction, relative on perpendicular end surface, and should extend outstanding lug position forming part in vertical direction partly over against (like Fig. 6, shown in 7).Divide the cutting die of cutting that can adopt present embodiment in the cutting process at pole piece; On can coating wall scroll to the coated that has non-applying area in the middle of per two continuous coating zones; Utilize present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece; Specifically the continuous coating zone in the both sides of non-applying area cuts out the pole piece body (being covered with electrode material in the metal foil surfaces coated) of this two pole piece in the centre; In non-applying area, cut out the two lugs welding positions (metal foil exposes) in two pole pieces; Promptly be slightly larger than the lug weld part that cutting on the non-coating zone of lug welding bit length of corresponding pole piece obtains two pole pieces at a width; Pole piece with respect in the pole piece coating pole piece of the prior art divides incision technology, utilizes the present embodiment pole piece to cut the cutting waste that mould can significantly reduce tinsel, helps practicing thrift cost.
The utility model people finds in the utility model process of the test; When carrying out being provided with of the above-mentioned first pole piece cutter 502, the second pole piece cutter 503; 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 are set to: 1.25 millimeters ± 0.25 millimeter for good; The edge of a knife minimum distance L that is about to this first pole piece cutter 502, the second pole piece cutter 503 is set to: 1.25 millimeters ± 0.25 millimeter for good; This is provided with and can on cutting technique smart control exactness and material savings, obtains balancedly preferably, is avoiding crossing the utilization rate of as far as possible saving metal foil on the problem basis that closely causes edge of a knife cutting generation deviation owing to its spacing.
In an embodiment should, this pole piece cut in the cutting die the first pole piece cutter 502 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 cut on the cutting die first surface at the pole piece that present embodiment provides and further paste first elastic layer 504, second elastic layer 505.In the zone of the sealing proterties that the edge of a knife that makes 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 first elastic layer 504.In the zone of the sealing proterties that the edge of a knife that also makes 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 first elastic layer 504.
And; Under nature; First elastic layer 504, 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, promptly elastic layer 504,505 under the nature that does not receive the external force effect 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 be 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, cuts at the present segment pole piece to finish and when driving offset plate 501 and leaving the coating wall scroll of slitting; This extruded elastic layer 504,505 has external elasticity tension; This tension force acts on offset plate 501 and coating wall scroll, and it is more agile that offset plate 501 and coating wall scroll are broken away from each other, avoids the phenomenon of bonding die takes place and influences the production efficiency that pole piece cuts and cut quality.
In order further to protect the edge of a knife of pole piece cutter and to be increased in the elastic force 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, first elastic layer 504, 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 above-mentioned first elastic layer 504, second elastic layer 505, the 3rd elastic layer 506 can but be not limited to sponge elastic layer or other rubber-like material layers.
Embodiment 2:
Referring to Fig. 8,9, shown in 10, present embodiment mainly describes with regard to application the utility model embodiment method in the pole piece coating film-making technology of single face coating, and the pole piece coating film-making process flow process that present embodiment provides mainly comprises the steps:
Step 801: first applying area, the coating continuously respectively of second applying area on coating wall scroll surface to be applied have predetermined interval between first applying area, second applying area.
Coating wall scroll in this step is referring to shown in Figure 9.
This coating wall scroll is a tinsel, and when making positive plate such as current needs, this coating wall scroll is an aluminium foil, and the electrode slurry that on this coating wall scroll, is coated with is that lithium compound is main positive electrode; When making negative plate like current needs, the coating wall scroll is a copper foil, and the electrode slurry that on this coating wall scroll, is coated with is a 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 stated, newfound other materials after also can adopting.
Adopt coating machine,, make electrode material be coated on the surface of conductive carbon layer at collection liquid surface coating electrode material slurry.
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 through coating machine; Be provided with the slit of the certain altitude that can supply the pole piece process at the slurry outlet place, can control the thickness that is coated on the electrode material on the collector like this.
In the control of coating uniformity, can carry out discharging and be coated with inhomogeneity adjustment through slurry discharging adjusting parts are set at slurry outlet.Wherein so-called uniformity comprises stability, uniformity and discharging opening discharging situation everywhere of load etc.
In coating process, can utilize parts such as correcting device that the smoothness and the accuracy of collector transmission are controlled, avoid the conveying generation deviation of collector, influence coating 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 arranged to it once to divide and are cut out two living pole pieces, so that in this batch, use, present embodiment promptly 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 first applying area, second applying area; In the middle of first applying area, second applying area, reserving predetermined width the utility model people is carrying out finding in the utility model process of the test; Can according to following mode set the width W reserved between first applying area, second applying area according to use in the follow-up pole piece separating and cutting process cut the first pole piece cutter 502 in the cutting die, the distance of the second pole piece cutter 503 confirms that its width equals the distance L among Fig. 6,7.
In actual set, the length of establishing the lug welding position on the pole piece that current need process is L, and then the width W of reserving between first applying area, second applying area is set at: L+1mm is good.
In this step, can adopt coating machine to carry out painting process; Adopt transmission mechanism; Drive coating wall scroll to be coated, make it, behind this this coating mechanism of coating wall scroll process through coating mechanism; The electrode material of lithium ion battery is applied to first applying area, second applying area on the coating wall scroll; Under the coating traction of wall scroll, during continuously through this coating mechanism, be covered with first coating zone 901, second coating zone 902 of electrode material in, surfaces coated continuous band-shaped through being formed with on the coating wall scroll of coating mechanism at connecting gear; The width of this first coating zone 901, second coating zone 902 equals the width of first applying area of original preset, second applying area respectively; Between first coating zone 901, second coating zone 902, be formed with non-coating zone 903, electrodeless material coating layer on this non-coating zone 903 and tinsel exposes, the width W of reserving between first applying area that the width of this non-coating zone 903 equals to be scheduled to, second applying area.The non-coating zone 903 that this centre is reserved can be used as the zone that cuts out of lug welding position when pole piece is cut.Specifically can be referring to the detailed description in the step 804.
Coating in the present embodiment can but be not limited to control the thickness that is coated on the electrode material on the coating wall scroll through the height in the slit, slurry outlet place located through adjustment coating wall scroll.
In the control of coating uniformity, can also carry out discharging and be coated with inhomogeneity adjustment through through the slurry outlet place that locates slurry discharging adjusting parts being set at the coating wall scroll.Wherein so-called uniformity comprises stability, uniformity and discharging opening discharging situation everywhere of load etc.
In coating process can but be not limited to utilize parts such as correcting device that the smoothness and the accuracy of collector transmission are controlled, avoid the conveying generation deviation of collector, influence coating effect and manufacturing schedule.
Step 802: drying.
Behind coating process, the coating wall scroll after the coating is admitted under the transmission of haulage gear through drying chamber or dryer, carries out stoving process and handles.Become the solid-state of drying through the electrode material on the coating wall scroll of dried by moistening slurry form, thereby fixedly cover the surface of tinsel.
Bake out temperature in the present embodiment can but be not limited to be set at: be equal to or less than 130 degrees centigrade temperature range, promptly 80 ℃ more than or equal to 80 degrees centigrade--130 ℃.
Step 803: the dry coating wall scroll that finishes of roll-in coating.
To through dried, the electrode material coat is with the solid-state wall scroll of coating that covers on the tinsel; Adopt draw-gear; Make this coating wall scroll that has been coated with carry out roller process; Further to make the effect that is stressed at the surperficial electrode coat of tinsel; Be fixed on the surface of tinsel more firmly, more equably: specifically can but be not limited to make this coating wall scroll that has been coated with through between the 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 pole piece of present embodiment to cut cutting die and cut pole piece.
The pole piece that uses in the present embodiment is cut cutting die and is record among the embodiment 1.Its structure can be referring to Fig. 5,6, shown in 7.
Adopt the pole piece cutting apparatus; Under the effect of tractive force; Make the cross cutting zone passage of cutting cutting die through the coating wall scroll of roll-in from pole piece; In minute cutting process, can control the transmission stepping stroke and the step frequency of coating wall scroll, in the cross cutting zone passage process of cutting cutting die of coating wall scroll, through cylinder or other power set at present embodiment; Drive the offset plate 501 on the pole piece carving knife mould; Make offset plate 501 together with nested be fixed on the first pole piece cutter 502 in the 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: first pole piece, second pole piece.
The shape of this first pole piece 1001, second pole piece 1002 is by the edge of a knife shape of the first pole piece cutter 502 on the cutting die of present embodiment, the edge of a knife shape unanimity of the second pole piece cutter 503.
Figure 10 is for dividing the principle schematic that cuts out pole piece at present embodiment on the coating wall scroll that is provided with non-coating zone 903 in the middle of the two continuous coating zones; Visible by Figure 10; First pole piece 1001 that obtains at the width of the coating wall scroll of every section slitting, the lug welding position of second pole piece 1002 be over against staggered, goes out in slitting on a common non-coating zone 903.
Referring to shown in Figure 10, the pole piece body of first pole piece 1001 divides in first coating zone 901 and cuts out, and the lug welding position 10011 non-coating zones in the centre of first pole piece cut out in 903 minutes; The pole piece body of second pole piece 1002 divides in second coating zone 902 and cuts out, and the lug welding position 10021 non-coating zones in the centre of second pole piece 1002 cut out in 903 minutes.
When cut finish after, under the effect of cylinder or other power, make pole piece cut cutting die and mention; Leave the coating wall scroll that is cut, the coating wall scroll continues stepping under the effect of tractive force; After stepping to predetermined stroke, stop, driving pole piece carving knife mould this moment and move to the coating wall scroll, on this section coating wall scroll, divide once more to cut out first pole piece, second pole piece 1002 to the coating wall scroll; So repeatedly, up to this coating wall scroll through roll-in cut fully finish till.
Because cut the lug position forming part 6011,6021 of pole piece forming part of the first pole piece cutter 502 in the cutting die, the second pole piece cutter 503 at the pole piece of present embodiment parallel in the horizontal direction; Relative on perpendicular end surface, and should extend outstanding lug position forming part 6011,6021 in vertical direction partly over against (like Fig. 6, shown in 7).
Divide at this step pole piece and to cut pole piece in the cutting process; On the coating wall scroll to the coated that has non-applying area in the middle of per two continuous coating zones; Utilize present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece; Specifically the continuous coating zone in the both sides of non-applying area cuts out the pole piece body (being covered with electrode material in the metal foil surfaces coated) of this two pole piece in the centre; In non-applying area, cut out two lugs welding position, 10011,10021 (metal foil exposes) in two pole pieces; Promptly be slightly larger than the lug weld part that cutting on the non-coating zone 903 of lug welding position 10011,10021 length of corresponding pole piece obtains two pole pieces at a width; Pole piece with respect in the pole piece coating pole piece of the prior art divides incision technology, utilizes the present embodiment pole piece to cut the cutting waste that mould can significantly reduce tinsel, helps practicing thrift cost.
In addition, in order further to improve the quality that pole piece divides cutting process in the present embodiment flow process, can also be shown in embodiment 1, the pole piece that provides at present embodiment is cut on the cutting die first surface and is further pasted first elastic layer 504, second elastic layer 505.In the zone of the sealing proterties that the edge of a knife that makes 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 first elastic layer 504.In the zone of the sealing proterties that the edge of a knife that also makes 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 first elastic layer 504.
And; Under nature; First elastic layer 504, 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, promptly elastic layer 504,505 under the nature that does not receive the external force effect 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 be 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, cuts at the present segment pole piece to finish and when driving offset plate 501 and leaving the coating wall scroll of slitting; This extruded elastic layer 504,505 has external elasticity tension; This tension force acts on offset plate 501 and coating wall scroll, and it is more agile that offset plate 501 and coating wall scroll are broken away from each other, avoids the phenomenon of bonding die takes place and influences the production efficiency that pole piece cuts and cut quality.
In order further to protect the edge of a knife of pole piece cutter and to be increased in the elastic force 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, first elastic layer 504, 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 above-mentioned first elastic layer 504, second elastic layer 505, the 3rd elastic layer 506 can but be not limited to sponge elastic layer or other rubber-like material layers.
Embodiment 3:
Referring to Figure 10, shown in 11, present embodiment mainly describes with regard to application the utility model embodiment method in the pole piece coating film-making technology of double spread, and the pole piece coating film-making process flow process that present embodiment provides mainly comprises the steps:
Step 1101: first applying area, the coating continuously respectively of second applying area on coating wall scroll surface to be applied have predetermined interval between first applying area, second applying area.
This step can but be not limited to referring to the record in the step 701 among the embodiment 2.
Step 1102: drying.
Make the wall scroll of coating that in step 1101, carries out after one side is coated with after coating, be conveyed into drying chamber or baking oven; Carry out dried; Become the solid-state of drying through the electrode material on the coating wall scroll of dried by moistening slurry form, thereby fixedly cover the surface of tinsel.
Concrete dry treatment process can be referring to step 1102 among the embodiment 2.
Step 1103: the coating wall scroll after step 1102 processing was advanced coating machine once more, be coated with on another surface of coating wall scroll.
Identical in coating in this step and the step 1101, the face that only is applied has changed another surface of this coating wall scroll into.
Coating is wall scroll passes through the coating mechanism of coating machine once more in this step after, and two surfaces of the coating wall scroll that comes out from coating mechanism all are coated with electrode material.The applying structure of this coating wall scroll positive and negative is all as shown in Figure 9.
Step 1104: drying.
Make the wall scroll of coating that in step 1103, carries out behind the double spread after coating, be conveyed into drying chamber or baking oven; Carry out dried; Become the solid-state of drying through the electrode material on the coating wall scroll of dried by moistening slurry form, thereby fixedly cover the surface of tinsel.
Concrete dry treatment process can be referring to step 1102 among the embodiment 2.
Step 1105: roll-in has been coated with the coating wall scroll that drying finishes.
The principle of this step and the operation can but be not limited to record referring to step 703 among the embodiment 2.Do not give unnecessary details once more.
Step 1106: adopt the special pole piece of present embodiment to cut cutting die and cut pole piece.
Step 704 is identical among concrete pole piece separating and cutting process in this step and the embodiment 2; Institute's difference only is that the positive and negative of the coating wall scroll of slitting is provided with first coating zone, second coating zone and middle non-coating zone in the present embodiment, is the pole piece of double spread so cut the pole piece that obtains.It cuts principle can be referring to shown in Figure 10.
With beneficial effect among the embodiment 2 in like manner; In the present embodiment; Because it is parallel in the horizontal direction that pole piece is cut the lug position forming part of pole piece forming part of the first pole piece cutter 502 in the cutting die, the second pole piece cutter; Relative on perpendicular end surface, and should extend outstanding lug position forming part in vertical direction partly over against (like Fig. 6, shown in 7).Divide at this step pole piece and to cut pole piece in the cutting process; On the coating wall scroll to the coated that has non-applying area in the middle of per two continuous coating zones; Utilize present embodiment cut cutting die cut the coating wall scroll width obtain paired pole piece; Specifically the continuous coating zone in the both sides of non-applying area cuts out the pole piece body (being covered with electrode material in the metal foil surfaces coated) of this two pole piece in the centre; In non-applying area, cut out the two lugs welding position (metal foil exposes) in two pole pieces, promptly be slightly larger than the lug weld part that cutting on the non-coating zone of lug welding bit length of corresponding pole piece obtains two pole pieces, divide incision technology with respect to the pole piece in the pole piece coating pole piece of the prior art at a width; Utilize the present embodiment pole piece to cut the cutting waste that mould can significantly reduce tinsel, help practicing thrift cost.
Data Comparison Analysis:
The utility model embodiment: Fig. 5, the pole piece shown in 6 are cut cutting die in employing the utility model; Adopt embodiment 2, the technological process shown in 3 to carry out pole piece 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: pole piece shown in Figure 2 is cut cutting die in the employing prior art, adopts Fig. 1, the coating separating and cutting process shown in 3 to make the lithium-ion electric core of a same size, and positive plate length is 88mm, and negative plate length is 89mm.
In the pole piece separating and cutting process, the anodal aluminium foil width that in the utility model embodiment, needs to adopt is:
Positive plate length (88mm)+0.5mm) * 2+ lug 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+ lug 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 anodal aluminium foil width to be:
Positive plate length (88mm) * 2+1mm+ lug 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+ lug welding position height (15mm) * 2+ die-cutting machine both sides pinch roller width (10mm)=219mm.
Contrast test data comparison by last is visible, and is existing for prior art, adopts the utility model embodiment method can save tinsel material 6.42% relatively, can obviously save cost greatly.
More than technical scheme that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper principle and the embodiment of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on the specific embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (7)
1. a pole piece is cut cutting die, it is characterized in that, comprises offset plate, the first pole piece cutter, the second pole piece cutter, and the said first pole piece cutter, the second pole piece cutter is nested is fixed in the said offset plate;
The edge of a knife of the said first pole piece cutter, the second pole piece cutter is respectively: shape with wait to cut the consistent first pole piece forming part, the second pole piece forming part of pole piece that obtains;
The said 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 said offset plate;
The first lug position forming part extension on the said first pole piece forming part is given prominence to: with the vertically opposite end of the said second pole piece forming part,
The second lug position forming part extension on the said second pole piece forming part is given prominence to: with the vertically opposite end of the said first pole piece forming part,
The said first lug position forming part, the second lug position forming part in vertical direction at least the part over against.
2. pole piece according to claim 1 is cut cutting die, it is characterized in that,
First surface at said offset plate also is pasted with first elastic layer, second elastic layer;
The said first pole piece forming part is positioned at the periphery of said first elastic layer,
The periphery that is positioned at said first elastic layer that the said second pole piece forming part forms,
Said the 3rd elastic layer is positioned at the periphery of the said first pole piece forming part and the second pole piece forming part;
Under nature, said first elastic layer, second elastic layer all are higher than the height of the said second pole piece forming part of the said first pole piece forming part at the height of said first surface.
3. pole piece according to claim 2 is cut cutting die, it is characterized in that,
First surface at said offset plate also is pasted with the 3rd elastic layer,
Said the 3rd elastic layer is positioned at the periphery of the said first pole piece forming part and the second pole piece forming part;
Under nature, said the 3rd elastic layer is higher than the height of the said second pole piece forming part of the said first pole piece forming part at the height of said first surface.
4. cut cutting die according to claim 1 or 2 or 3 described pole pieces, it is characterized in that,
The said second lug position forming part being spaced apart: 1.25 millimeters ± 0.25 millimeter to the said first pole piece forming part.
5. cut cutting die according to claim 1 or 2 or 3 described pole pieces, it is characterized in that,
The said first lug position forming part being spaced apart: 1.25 millimeters ± 0.25 millimeter to the second pole piece forming part.
6. cut cutting die according to claim 1 or 2 or 3 described pole pieces, it is characterized in that,
The said first pole piece cutter or the second pole piece cutter are: the minute surface cutter.
7. cut cutting die according to claim 1 or 2 or 3 described pole pieces, it is characterized in that,
The said first pole piece cutter and the second pole piece cutter are: the minute surface cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203330170U CN202241463U (en) | 2011-09-06 | 2011-09-06 | Cutting die for pole piece slitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203330170U CN202241463U (en) | 2011-09-06 | 2011-09-06 | Cutting die for pole piece slitting |
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| Publication Number | Publication Date |
|---|---|
| CN202241463U true CN202241463U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203330170U Withdrawn - After Issue CN202241463U (en) | 2011-09-06 | 2011-09-06 | Cutting die for pole piece slitting |
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| CN (1) | CN202241463U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357923A (en) * | 2011-09-06 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece dividing and cutting die and coating production method of pole piece |
| CN112786836A (en) * | 2020-12-31 | 2021-05-11 | 漳州华锐锂能新能源科技有限公司 | Equipment and process for manufacturing cylindrical battery cell of water-based anode |
-
2011
- 2011-09-06 CN CN2011203330170U patent/CN202241463U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357923A (en) * | 2011-09-06 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece dividing and cutting die and coating production method of pole piece |
| CN112786836A (en) * | 2020-12-31 | 2021-05-11 | 漳州华锐锂能新能源科技有限公司 | Equipment and process for manufacturing cylindrical battery cell of water-based anode |
| CN112786836B (en) * | 2020-12-31 | 2022-02-25 | 漳州华锐锂能新能源科技有限公司 | Equipment and process for manufacturing cylindrical battery cell of water-based anode |
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| AV01 | Patent right actively abandoned |
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