CN102810660B - Battery pole piece cutting-off equipment and battery pole piece cutting-off method - Google Patents
Battery pole piece cutting-off equipment and battery pole piece cutting-off method Download PDFInfo
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- CN102810660B CN102810660B CN201210295959.3A CN201210295959A CN102810660B CN 102810660 B CN102810660 B CN 102810660B CN 201210295959 A CN201210295959 A CN 201210295959A CN 102810660 B CN102810660 B CN 102810660B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses battery pole piece cutting-off equipment and a battery pole piece cutting-off method. The battery pole piece cutting-off equipment comprises a feeding device, a cutting knife device, a supporting device and a coiling device, wherein the feeding device is used for sending out a first diaphragm, a pole piece and a second diaphragm which are sequentially overlapped at the same feeding speed; the cutting knife device is arranged at the downstream of the feeding device and comprises a knife rest and a cutting knife fixed on the knife rest; the knife rest is used for pressing the cutting knife towards the first diaphragm by moving or autorotating and cutting off only the pole piece from the first diaphragm side by being separated by the first diaphragm; the supporting device is opposite to the cutting knife device by being separated by the first diaphragm, the pole piece and the second diaphragm so as to support the cutting knife below the second diaphragm when the cutting knife is pressed towards the first diaphragm; and the coiling device is arranged at the downstream of the cutting knife device and is used for coiling the first diaphragm, the cut-off pole piece and the second diaphragm together. The battery pole piece cutting-off equipment can avoid adhesion of the pole piece to a knife edge of the cutting knife and pollution to the knife edge, avoid deformation of the pole piece, and omit a step of fixing the pole piece and the diaphragm through an adhesive tape, thus simplifying the manufacturing process of a battery.
Description
Technical field
The present invention relates to technical field of chemical power, relate in particular to a kind of battery pole piece and cut off equipment and battery pole piece cutting-off method.
Background technology
The manufacture method of battery comprises and will form the process of battery core together with stacked to pole piece and barrier film being wound on.In the process of this formation battery core, pole piece need to be cut to the length needing, and the end of the pole piece after cutting off need to be fixed to barrier film.As shown in Figure 1, cut off by action from top to bottom of cutting knife 21 ' from the pole piece 5 ' of pay-off (not shown), to have the length needing, and the end of the pole piece 5 ' of each cut-out will be fixed to barrier film 6 ' by adhesive tape 9 '.Be appreciated that in prior art, when pole piece 5 ' is cut off, the edge of a knife of cutting knife 21 ' directly contacts pole piece 5 ', and pole piece 5 ' is generally softer metals (as lithium or lithium alloy), thereby the material on pole piece 5 ' easily affixes to the edge of a knife and then pollutes the edge of a knife.In addition, as shown in Figure 2, because pole piece 5 ' is softer, when cutting knife 21 ' moves upward after cut-out pole piece 5 ', also the end of the pole piece 5 ' cutting off may be taken up, make it to produce deformation.And as described above, every pole piece 5 ' all needs to fix by adhesive tape 9 ' and barrier film 6 ', makes the manufacturing process of battery more complicated.
Therefore, need to provide a kind of battery pole piece to cut off equipment and battery pole piece cutting-off method, to address the above problem.
Summary of the invention
For solving the problems of the technologies described above, according to an aspect of the present invention, provide a kind of battery pole piece to cut off equipment, this battery pole piece cut-out equipment comprises: pay-off, for the feeding speed with identical, the first stacked in turn barrier film, pole piece and the second barrier film are sent; Cutter, the downstream that it is arranged on pay-off, comprises knife rest and is fixed on the cutting knife on knife rest, this knife rest is for by mobile or certainly then make cutting knife press to the first barrier film and only pole piece cut off from the first barrier film side across the first barrier film; Bracing or strutting arrangement, itself and cutter are oppositely arranged across the first barrier film, pole piece and the second barrier film, with in the time that cutting knife presses to the first barrier film at the second barrier film supported underneath cutting knife; And coiler device, it is arranged on the downstream of cutter, for by the first barrier film, cut pole piece together with the second membrane winding.
Further, this pay-off comprises: pole piece feeding device, for sending pole piece; The first barrier film pay-off, for sending the first barrier film, the first barrier film is covered on a surface of pole piece; The second barrier film pay-off, for sending the second barrier film, the second barrier film is covered on another surface of pole piece; And guider, be arranged on the downstream of the first barrier film pay-off, pole piece feeding device and the second barrier film pay-off, for the first barrier film, pole piece and the second barrier film are guided to downstream.
Further, this knife rest is swivelling tool-holder, and cutting knife is fixed on the periphery of knife rest, and this knife rest is arranged to can be by certainly then make cutting knife press to the first barrier film, and has the direction of motion identical with the first barrier film while making cutting knife press to the first barrier film.
Further, the linear velocity of cutting knife and feeding speed are basic identical.
Further, this equipment also has the adjusting device for the gap between adjusting supporting device and cutter.
Further, bracing or strutting arrangement comprises initiatively runner, and the periphery of this active runner is against the second barrier film, and the linear velocity of the periphery of this active runner is arranged to identical with the linear velocity of the second barrier film.
Further, bracing or strutting arrangement comprises driven runner, and the periphery of this driven runner is against the second barrier film, and this driven runner is driven by the second barrier film and rotates.
Further, bracing or strutting arrangement also comprises flexible adjustment member, and this flexible adjustment member is arranged to apply adjustable elastic force and is regulated the pressure between runner and the second barrier film to runner.
Further, knife rest is arranged to be moved and to make cutting knife press to the first barrier film perpendicular to the direction of the first barrier film by edge.
Further, the edge of a knife that cutting knife has the first cutting knife plane, the second cutting knife plane and formed by the first cutting knife plane and the second cutting knife Plane intersects.
Further, cutting knife has the first cutting knife cambered surface, the second cutting knife cambered surface and intersects by the first cutting knife cambered surface and the second cutting knife cambered surface the edge of a knife forming, and the first cutting knife cambered surface and the second cutting knife cambered surface are all recessed towards cutting knife inside.
According to another aspect of the present invention, also provide a kind of battery pole piece cutting-off method, the method comprises: feeding step, wherein with identical feeding speed, the first stacked in turn barrier film, pole piece and the second barrier film are sent; Cut off step, wherein in supporting the second barrier film, only pole piece is cut off from the first barrier film side across the first barrier film; And coiling step, wherein by the first barrier film, cut pole piece together with the second membrane winding.
Further, the method is implemented with battery pole piece cut-out equipment, and this battery pole piece cut-out equipment comprises: pay-off, for the feeding speed with identical, the first stacked in turn barrier film, pole piece and the second barrier film are sent; Cutter, the downstream that it is arranged on pay-off, comprises knife rest and is fixed on the cutting knife on knife rest, this knife rest is for by mobile or certainly then make cutting knife press to the first barrier film and only pole piece cut off from the first barrier film side across the first barrier film; Bracing or strutting arrangement, itself and cutter are oppositely arranged across the first barrier film, pole piece and the second barrier film, with in the time that cutting knife presses to the first barrier film at the second barrier film supported underneath cutting knife; And coiler device, it is arranged on the downstream of cutter, for by the first barrier film, cut pole piece together with the second membrane winding, wherein, in feeding step, pay-off is sent the first stacked in turn barrier film, pole piece and the second barrier film with identical feeding speed; Cutting off in step, in making bracing or strutting arrangement support the second barrier film, make knife rest by mobile or certainly then make cutting knife press to the first barrier film and only pole piece cut off from the first barrier film side across the first barrier film; In coiling step, make coiler device by the first barrier film, cut pole piece together with the second membrane winding.
Further, this knife rest is swivelling tool-holder, and cutting knife is fixed on the periphery of knife rest, and knife rest is arranged to can be by certainly then make cutting knife press to the first barrier film, and has the direction of motion identical with the first barrier film while making cutting knife press to the first barrier film; In the time carrying out cut-out step, feeding step does not stop; Cut-out step comprises: in making bracing or strutting arrangement support the second barrier film, make knife rest autobiography and make cutting knife press to the first barrier film and only pole piece cut off from the first barrier film side across the first barrier film, and have the direction of motion identical with the first barrier film while making cutting knife press to the first barrier film; Continue to make knife rest autobiography and make cutting knife away from the first barrier film.
Further, knife rest is arranged to be moved and to make cutting knife press to the first barrier film perpendicular to the direction of the first barrier film by edge; Feeding step was suspended and is carried out before carrying out cut-out step, and restarted after completing cut-out step; Cut-out step comprises: make knife rest along moving and make cutting knife press to the first barrier film and only pole piece cut off from the first barrier film side across the first barrier film perpendicular to the direction of the first barrier film; Follow rest and make cutting knife away from the first barrier film.
Further, pole piece is made up of lithium or lithium alloy, and the first barrier film and the second barrier film are made up of porous polymer materials.
The present invention has following technique effect:
In battery pole piece cut-out equipment of the present invention, cutting knife in cutter along with the movement of knife rest or certainly then press to the first barrier film, and only pole piece is cut off (namely from the first barrier film side across the first barrier film, the first barrier film is continuous, and pole piece is disconnected, this is due in battery making field, pole piece material is generally softer, and the material of barrier film is relatively hard, thereby can realize across barrier film, pole piece is cut off), this has just been avoided the stickup of the edge of a knife and the pollution of the edge of a knife of pole piece and cutting knife, and then, because the edge of a knife does not directly contact with pole piece, also can not move upward after cutting knife cuts off pole piece time, the end of pole piece is taken up, thereby avoid the deformation of pole piece.In addition, because the material of pole piece is softer, make to use battery pole piece of the present invention to cut off equipment, the end (being cut off place) of pole piece and the adhesion of barrier film in the process of pole piece being cut off across the first barrier film, have been realized by means of the pressure of the edge of a knife, thereby can omit by adhesive tape pole piece and the fixing step of barrier film, simplify the manufacturing process of battery.
As a same reason, use according to battery pole piece cutting-off method of the present invention, in cut-out step, in supporting the second barrier film, only pole piece is cut off from the first barrier film side across the first barrier film, avoid the stickup of the edge of a knife and the pollution of the edge of a knife of pole piece and cutting knife, and then, because the edge of a knife does not directly contact with pole piece, also can not move upward after cutting knife cuts off pole piece time, the end of pole piece is taken up, thereby avoided the deformation of pole piece.In the process of will pole piece across the first barrier film cutting off, realize the end (being cut off place) of pole piece and the adhesion of barrier film, thereby can omit by adhesive tape pole piece and the fixing step of barrier film, simplify the manufacturing process of battery.
In summary of the invention part, introduced the concept of a series of reduced forms, this will further describe in embodiment part.Summary of the invention part of the present invention does not also mean that key feature and the essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection range of attempting to determine technical scheme required for protection.
Below in conjunction with accompanying drawing, describe advantages and features of the invention in detail.
Brief description of the drawings
Following accompanying drawing of the present invention is used for understanding the present invention in this as a part of the present invention.Shown in the drawings of embodiments of the present invention and description thereof, be used for explaining principle of the present invention.In the accompanying drawings,
Fig. 1 shows the cut-out of pole piece and the fixing schematic diagram of pole piece and barrier film in existing battery manufacturing process;
Fig. 2 shows the schematic diagram that in the battery manufacturing process of prior art, cutting knife takes up pole piece end in the time cutting off pole piece;
Fig. 3 shows according to the master of the battery pole piece cut-out equipment of the first embodiment of the present invention and looks schematic diagram;
Fig. 4 shows the schematic perspective view that cuts off equipment according to the battery pole piece of the first embodiment of the present invention.
Embodiment
In the following description, a large amount of concrete details have been provided to more thorough understanding of the invention is provided.But, it will be apparent to one skilled in the art that the present invention can be implemented without one or more these details.In other example, for fear of obscuring with the present invention, be not described for technical characterictics more well known in the art.
In order thoroughly to understand the present invention, will detailed structure be proposed in following description.Obviously, execution of the present invention is not limited to the specific details that those skilled in the art has the knack of.Preferred embodiment of the present invention is described in detail as follows, but except these are described in detail, the present invention can also have other execution modes.
As shown in Figure 3 and Figure 4, comprise pay-off 1, cutter 2, bracing or strutting arrangement 3 and coiler device 4 according to the battery pole piece cut-out equipment of the first embodiment of the present invention.Pay-off 1 is sent the first stacked in turn barrier film 6, pole piece 5 and the second barrier film 7 for the feeding speed with identical along the indicated direction of the arrow A of Fig. 3.Cutter 2 is arranged on the downstream of pay-off 1, comprises knife rest 22 and is fixed on the cutting knife 21 on knife rest 22, and this knife rest 22 is for by certainly then make cutting knife 21 press to the first barrier film 6 and only pole piece 5 cut off from the first barrier film 6 sides across the first barrier film 6; Accordingly, bracing or strutting arrangement 3 is oppositely arranged across the first barrier film 6, pole piece 5 and the second barrier film 7 with cutter 2, with in the time that cutting knife 21 presses to the first barrier film 6 at the second barrier film 7 supported underneath cutting knifes 21.Coiler device 4 is arranged on the downstream of cutter 2, and together with the first barrier film 6, cut pole piece 5 are wound on the second barrier film 7, the direction of coiling is as shown in the arrow B in Fig. 3.Wherein, pay-off 1 comprises driving and sends the feeding driving device (not shown) of the first barrier film 6, pole piece 5 and the second barrier film 7; Cutter 2 is yet included in the knife rack driving mechanism (not shown) that knife rest 22 connects, for driving knife rest 22 spinning motions; Coiler device 4 also comprises the coiling drive unit (not shown) for driving the motion of reeling.These drive units (feeding driving device, knife rack driving mechanism, coiling drive unit etc.) can be for example common electric machine, stepping motor etc.Be appreciated that, in this battery pole piece cut-out equipment, cutting knife 21 along with knife rest 22 certainly then press to the first barrier film 6, and only pole piece 5 is cut off (namely from the first barrier film 6 sides across the first barrier film 6, the first barrier film 6 is continuous, and pole piece 5 is disconnected, this is due in battery making field, pole piece material is generally softer, and the material of barrier film is relatively hard, thereby can realize across barrier film, pole piece is cut off), this has just been avoided the stickup of the edge of a knife and the pollution of the edge of a knife of pole piece 5 with cutting knife 21, and then, because the edge of a knife does not directly contact with pole piece 5, also can not move upward after cutting knife 21 cuts off pole piece 5 time, the end (place of being cut off) of pole piece 5 is taken up, thereby avoid the deformation of pole piece 5.In addition, because the material of pole piece is softer, make to use battery pole piece of the present invention to cut off equipment, the end (being cut off place) of pole piece 5 and the adhesion of barrier film in the process of pole piece 5 being cut off across the first barrier film 6, have been realized by means of the pressure of the edge of a knife, thereby can omit by adhesive tape pole piece and the fixing step of barrier film, simplify the manufacturing process of battery.
In the present embodiment, the cutting knife 21 that knife rest 22 makes to be fixed on knife rest 22 by autobiography presses to the first barrier film 6 so that pole piece 5 is cut off.Be appreciated that in the present embodiment, by the autobiography of knife rest 22, cutting knife 21 cut off pole piece 5, be cut off back tool rest 22 at pole piece 5 and continue autobiography, thus drive cutting knife 21 with rotation away from the first barrier film 6.Certainly, in practice knife rest 22 also can by mobile but not from then make cutting knife press to the first barrier film 6 and only pole piece 5 cut off from the first barrier film 6 sides across the first barrier film 6, now, correspondingly, the movement of the knife rack driving mechanism control knife rest 22 in cutter 2 and nonrotational.
Preferably, in the present embodiment, this pay-off 1 comprises pole piece feeding device 11, the first barrier film pay-off 12 and the second barrier film pay-off 13.Pole piece feeding device 11 is for sending pole piece 5; The first barrier film pay-off 12 is for sending the first barrier film 6, the first barrier film 6 is covered on a surface of pole piece 5; The second barrier film pay-off 13 is for sending the second barrier film 7, so that the second barrier film 7 is covered on another surface of pole piece 5.The mutual alignment of this first barrier film pay-off 12, pole piece feeding device 11 and the second barrier film pay-off 13 is arranged so that the first barrier film 6, pole piece 5, the second barrier film 7 sent are stacked in turn from top to bottom, for example, in the simplest situation, the first barrier film pay-off 12, pole piece feeding device 11 and the second barrier film pay-off 13 from top to bottom can be arranged in turn.In addition, it will be understood by those skilled in the art that correspondingly, pole piece feeding device 11 comprises pole piece feeding drive unit (not shown), for driving the feeding action of sending pole piece 5; The first barrier film pay-off 12 comprises the first barrier film feeding driving device (not shown), for driving the feeding action of sending the first barrier film 6; The second barrier film pay-off 13 comprises the second barrier film feeding driving device (not shown), for driving the feeding action of sending the second barrier film 7.Be appreciated that here the common formation of pole piece feeding drive unit, the first barrier film feeding driving device and the second barrier film feeding driving device feeding driving device mentioned above.
In addition, in the present embodiment, pay-off 1 also comprises guider 14, and this guider 14 is arranged on the downstream of the first barrier film pay-off 11, pole piece feeding device 12 and the second barrier film pay-off 13, for the first barrier film 6, pole piece 5 and the second barrier film 7 are guided to downstream.As shown in Figure 3, in the present embodiment, this guider 14 can have guiding gap, for stacked the first barrier film 6, pole piece 5 and the second barrier film 7 in turn from pay-off 1 is guided through to this gap, and then guiding downstream.Or, in unshowned other embodiment, this guider 14 also can be for example for arrange higher than the single roller of the first barrier film pay-off 12, pole piece feeding device 11 and the second barrier film pay-off 13, the first barrier film 6, pole piece 5 and the second barrier film 7 are by the edge guiding downstream along this roller.
Preferably, in the present embodiment, knife rest 22 is swivelling tool-holder, cutting knife 21 is fixed on the periphery of knife rest 22, this knife rest 22 be arranged to can by along the indicated direction of arrow C in Fig. 3 from then make cutting knife 21 press to the first barrier film 6, and there is the direction of motion identical with the first barrier film 6 while making cutting knife 21 press to the first barrier film 6.Be appreciated that, with this kind of setting, cutting knife 21 can be along with the carrying out of the feeding of pay-off 1, and in the process of moving downstream at the first barrier film 6, pole piece 5 and the second barrier film 7, pole piece 5 is cut off, stop the feeding of the first barrier film 6, pole piece 5 and the second barrier film 7 to carry out cut-out work without pay-off 1.That is to say, in the time that knife rest 22 is swivelling tool-holder, can under continual situation is moved in the feeding of pay-off 1, complete each cut-out work to pole piece 5.So just greatly improve battery pole piece and cut off the operating efficiency of equipment.
More preferably, in the present embodiment, the linear velocity of cutting knife 21 and feeding speed are set to basic identical.Like this, the moment of across the first barrier film 6, pole piece 5 being cut off at cutting knife 21, the linear velocity of cutting knife 21 in diaphragm movement direction is identical with the speed of the first barrier film 6, pole piece 5 and the second barrier film 7, thereby in diaphragm movement direction, cutting knife 21 is substantially relative static with the first barrier film 6, pole piece 5 and the second barrier film 7, and the effect of cut-out is better.It will be appreciated by those skilled in the art that, the linear velocity of cutting knife 21 and feeding speed are set to when identical, cutting knife 21 and the first barrier film 6, pole piece 5 and the second barrier film 7 are relatively complete static, at this moment the effect of cutting off is best, but, linear velocity and the feeding speed of cutting knife 21 basic identical (for example linear velocity of cutting knife 21 and feeding speed differ ± 5% in) also can reach good cut-out effect, and have reduced the control difficulty to equipment.
In the present embodiment, preferably, this equipment also has the adjusting device (not shown) for the gap between adjusting supporting device 3 and cutter 2.This apparatus for regulating can for example be connected to bracing or strutting arrangement 3, with the upper-lower position of adjusting supporting device 3, and then gap between adjusting supporting device 3 and cutter 2.Like this, the gap between bracing or strutting arrangement 3 and cutter 2 is adjustable, also just can and then according to circumstances regulate the edge of a knife of cutting knife 21 to be pressed in the size of the pressure on the first barrier film 6 and pole piece 5, makes it just pole piece 5 to be cut off, and keeps the complete of the first barrier film 6 simultaneously.
In addition, in the present embodiment, cut off rotationally the cut-out mode of electrode 5 corresponding to cutting knife 21, bracing or strutting arrangement 3 comprises runner 31, the periphery of this runner 31 is against the second barrier film 7, along with the motion downstream of the first barrier film 6, pole piece 5 and the second barrier film 7 and rotate, thereby in rotation process, play the supporting role to the first barrier film 6, pole piece 5 and the second barrier film 7.Be appreciated that the first barrier film 6, pole piece 5 and the second barrier film 7 are between the edge of a knife and runner 31 of cutting knife 21, cutting knife 21 cuts off pole piece 5 under the support of the periphery of runner 31.
Preferably, this runner 31 can be runner initiatively, this initiatively runner for example can be driven with active rotation by motor (as stepping motor or the common electric machine by Frequency Converter Control etc.), identical with the linear velocity of the second barrier film 7 so that the linear velocity of periphery is arranged to.Runner 31 is set to be driven and can initiatively runner of active rotation by motor etc., can makes equipment operation ground more smooth.
Or preferably, this runner 31 can be driven runner, and this driven runner is driven and rotated by the second barrier film 7.Runner 31 is set to the driven runner thereupon being rotated by the drive of the second barrier film 7, can saves the drive units such as corresponding motor, thus the cost of the equipment of saving, and then the rate of breakdown of minimizing equipment.
More preferably, bracing or strutting arrangement 3 also comprises flexible adjustment member 32, and this flexible adjustment member 32 is arranged to apply adjustable elastic force to runner 31 and is regulated the pressure between runner 31 and the second barrier film 7.In the present embodiment, flexible adjustment member 32 comprises spring element 321, pole 322 and support portion 323.Spring element 321 is arranged on one end of pole 322, and the other end is fixed to the rotating shaft of runner 31, and support portion 323 is positioned at the centre of pole 322.Like this, the elastic force that spring element 321 applies one end of pole 322 can be transferred to the other end of pole 322 to the power upwards of runner 31, thereby further finely tune the pressure between runner 31 and cutting knife 21, be pressed in the size of the pressure on the first barrier film 6 and pole piece 5 further to finely tune the edge of a knife of cutting knife 21.
In addition, preferably, the cutting knife 21 in the present embodiment has the first cutting knife cambered surface, the second cutting knife cambered surface and intersects by the first cutting knife cambered surface and the second cutting knife cambered surface the edge of a knife forming, and the first cutting knife cambered surface and the second cutting knife cambered surface are all inner recessed towards cutting knife 21.Sharper by the edge of a knife forming to inner the first recessed cutting knife cambered surface of cutting knife and the second cutting knife cambered surface, cut off pole piece easier.Or preferably, according to other embodiments of the invention, the edge of a knife that cutting knife 21 also can have the first cutting knife plane, the second cutting knife plane and be formed by the first cutting knife plane and the second cutting knife Plane intersects.The first cutting knife plane of plane form and the second cutting knife plane make whole cutting knife be more prone to make, the manufacturing cost of having saved equipment.
It is basic identical that battery pole piece cut-out equipment according to a second embodiment of the present invention and the battery pole piece of the first embodiment cut off equipment, except in a second embodiment, knife rest 22 is arranged to be moved and to make cutting knife 21 press to the first barrier film 6 perpendicular to the direction of the first barrier film 6 by edge, namely the knife rest 22 in the second embodiment can not rotate, but rectilinear movement is to cut off pole piece 5.Be appreciated that, in this kind of cut-out mode, because the not component motion in the direction of advance of the first barrier film 6, pole piece 5 and the second barrier film 7 of cutting knife 21, so before cutting knife 21 presses to the first barrier film 6, need pay-off 1 to stop the feeding to the first barrier film 6, pole piece 5 and the second barrier film 7, and after pole piece 5 is cut off, need pay-off 1 to continue the feeding to the first barrier film 6 and the second barrier film 7, and together with the first barrier film 6, cut pole piece 5 being wound on the second barrier film 7 by coiler device.
Be appreciated that, use the battery pole piece cut-out equipment of the second embodiment can realize equally the stickup of the edge of a knife and the pollution of the edge of a knife of avoiding pole piece 5 and cutting knife 21, also can realize the deformation of avoiding pole piece 5, and can omit by adhesive tape pole piece and the fixing step of barrier film.But owing to cutting off when action at every turn, all need pay-off 1 to stop feeding, then cutting off the feeding that needs to restart pay-off 1 after action, thereby the battery pole piece in can the first embodiment of rotation with respect to knife rest cuts off equipment, the operating efficiency of the battery pole piece cut-out equipment in the present embodiment is relatively low, but the motion of the present embodiment intermediate slide 21 is rectilinear movement, so the structure of knife rest 21 is relatively simpler, the corresponding control of cutter setting frame 21 (comprise connect with knife rest motor etc.) is also relative simpler, cut off the structure of equipment thereby simplified whole battery pole piece.
According to another aspect of the present invention, also provide a kind of battery pole piece cutting-off method.The method of a third embodiment in accordance with the invention comprises the following steps:
S1: feeding step, wherein with identical feeding speed, the first stacked in turn barrier film, pole piece and the second barrier film are sent;
S2: cut off step, wherein only pole piece is cut off from the first barrier film side across the first barrier film in supporting the second barrier film; And
S3: coiling step, wherein by the first barrier film, cut pole piece together with the second membrane winding.
Because in step S2, in supporting the second barrier film, only pole piece is cut off from the first barrier film side across the first barrier film, namely, the first barrier film is continuous, and pole piece is disconnected, (this is due in battery making field, pole piece material is generally softer, and the material of barrier film is relatively hard, thereby can realize across barrier film, pole piece is cut off), this has just been avoided the stickup of the edge of a knife and the pollution of the edge of a knife of pole piece with the cutting knife for cutting off pole piece, and then, because the edge of a knife does not directly contact with pole piece, also can not move upward after cutting knife cuts off pole piece time, the end (place of being cut off) of pole piece is taken up, thereby avoid the deformation of pole piece.In addition, because the material of pole piece is softer, make to use this method, the end (being cut off place) of pole piece and the adhesion of barrier film in the process of pole piece being cut off across the first barrier film, have been realized by means of the pressure of the edge of a knife, thereby can omit by adhesive tape pole piece and the fixing step of barrier film, simplify the manufacturing process of battery.
Preferably, in the present embodiment, the method is implemented with battery pole piece cut-out equipment, and as shown in Figure 3 and Figure 4, this battery pole piece cut-out equipment comprises pay-off 1, cutter 2, bracing or strutting arrangement 3 and coiler device 4.Pay-off 1 is sent the first stacked in turn barrier film 6, pole piece 5 and the second barrier film 7 for the feeding speed with identical; Cutter 2 is arranged on the downstream of pay-off 1, comprise knife rest 22 and be fixed on the cutting knife 21 on knife rest 22, this knife rest 22 is for by mobile or certainly then make cutting knife 21 press to the first barrier film 6 and only pole piece 5 cut off from the first barrier film 6 sides across the first barrier film 6, and the rotation of knife rest 22 and move mode are with reference to above to according to the explanation of the equipment of the first embodiment of the present invention and the second embodiment.Bracing or strutting arrangement 3 is oppositely arranged across the first barrier film 6, pole piece 5 and the second barrier film 7 with cutter 2, with in the time that cutting knife 21 presses to the first barrier film 6 at the second barrier film 7 supported underneath cutting knifes 21.Coiler device 4 is arranged on the downstream of cutter 2, together with the first barrier film 6, cut pole piece 5 are wound on the second barrier film 7.
Wherein, in step S1(feeding step) in, pay-off 1 is sent the first stacked in turn barrier film 6, pole piece 5 and the second barrier film 7 with identical feeding speed; Cut off step at step S2() in, in making bracing or strutting arrangement 3 support the second barrier film 7, make knife rest 22 by mobile or certainly then make cutting knife 21 press to the first barrier film 6 and only pole piece 5 cut off from the first barrier film 6 sides across the first barrier film 6; In step S3(coiling step) in, make coiler device 4 is wound on the first barrier film 6, cut pole piece 5 with the second barrier film 7 together with.
More preferably, in the present embodiment, the knife rest 22 in equipment is swivelling tool-holder, and cutting knife 21 is fixed on the periphery of knife rest 22, knife rest 22 is arranged to can be by certainly then make cutting knife 21 press to the first barrier film 6, and have the direction of motion identical with the first barrier film 6 while making cutting knife 21 press to the first barrier film 6.Like this, while pressing to the first barrier film 6 due to cutting knife 21, there is the component motion identical with the direction of advance of the first barrier film 6, pole piece 5 and the second barrier film 7, thereby cut off step at execution step S2() time, step S1(feeding step) do not stop.And, correspondingly, in the present embodiment, cut off step and comprise following sub-step:
Sub-step S21: make knife rest 22 autobiographies and make cutting knife 21 press to the first barrier film 6 and only pole piece 5 cut off from the first barrier film 6 sides across the first barrier film 6 in making bracing or strutting arrangement 3 support the second barrier film 7, and thering is the direction of motion identical with the first barrier film 6 while making cutting knife 21 press to the first barrier film 6; And
Sub-step S22: continue to make knife rest 22 autobiographies and make cutting knife 21 away from the first barrier film 6.
Along with the operation of sub-step S22, completed the once cut-out to pole piece 5, and oneself goes to while again pressing to the first barrier film 6 when knife rest 22 continuation, can cut off work next time.
Be appreciated that S2(cuts off step in execution step because in the method for the present embodiment) time, step S1(feeding step) need not stop, so the efficiency of the work of cut-out is greatly improved.
The battery pole piece cutting-off method of a fourth embodiment in accordance with the invention and the method for the 3rd embodiment are basic identical, difference is, in the method for the 4th embodiment, the knife rest 22 in the use battery pole piece cut-out equipment using is arranged to can be by making cutting knife 21 press to the first barrier film 6 along moving (but not rotation) perpendicular to the direction of the first barrier film 6.
Because in the present embodiment, knife rest 22 moves perpendicular to the direction of the first barrier film 6 by edge, the namely not component motion in the direction of advance of the first barrier film 6, pole piece 5 and the second barrier film 7 of cutting knife 21, so accordingly, in the method for the 4th embodiment, step S1(feeding step) cut off step at execution step S2() to suspend before execution, to facilitate the carrying out of step S2, and step S1 cuts off step at completing steps S2() restart afterwards; And in the present embodiment, step S2(cuts off step) comprise following sub-step:
S21a: make knife rest 22 along moving and make cutting knife 21 press to the first barrier film 6 and only pole piece 5 cut off from the first barrier film 6 sides across the first barrier film 6 perpendicular to the direction of the first barrier film 6; And
S21b: follow rest 22 and make cutting knife 21 away from the first barrier film 6.
Along with the operation of sub-step S22b, complete the once cut-out to pole piece 5, and in the time that knife rest 22 presses to the first barrier film 6 downwards again, can cut off work next time.
Use the battery pole piece cutting-off method of the 4th embodiment can realize equally to avoid the stickup of the edge of a knife and the pollution of the edge of a knife of pole piece 5 and cutting knife 21, also can realize the deformation of avoiding pole piece 5, and can omit by adhesive tape pole piece and the fixing step of barrier film.But owing to cutting off when action at every turn, all need pay-off 1 to stop feeding, then cutting off the feeding that needs to restart pay-off 1 after action, thereby with respect to the battery pole piece cutting-off method in the 3rd embodiment, (knife rest 22 that wherein used is swivelling tool-holder, and in the time cutting off step, feeding step does not stop), the operating efficiency of the method for the present embodiment is relatively low, but the motion of the knife rest using in the present embodiment 21 is rectilinear movement, so the structure of knife rest 21 is relatively simpler, control also relatively simpler.
In addition, preferably, pole piece 5 is made up of lithium or lithium alloy in battery pole piece cutting-off method according to the present invention, (to comprise the method for the 3rd embodiment and the method for the 4th embodiment), and the first barrier film 6 and the second barrier film 7 are made up of porous polymer materials known in the art, for example.Lithium or Zinc-lithium alloy material are softer, and porous polymer materials is harder with respect to lithium or lithium alloy, only pole piece are cut off to (maintenance the first barrier film is continuous) so easily realize across the first barrier film from the first barrier film side.
The present invention is illustrated by above-described embodiment, but should be understood that, above-described embodiment is the object for giving an example and illustrating just, but not is intended to the present invention to be limited in described scope of embodiments.In addition it will be appreciated by persons skilled in the art that the present invention is not limited to above-described embodiment, can also make more kinds of variants and modifications according to instruction of the present invention, these variants and modifications all drop in the present invention's scope required for protection.Protection scope of the present invention is defined by the appended claims and equivalent scope thereof.
Claims (17)
1. battery pole piece cuts off an equipment, it is characterized in that, described battery pole piece cut-out equipment comprises:
Pay-off, sends the first stacked in turn barrier film, pole piece and the second barrier film for the feeding speed with identical;
Cutter, it is arranged on the downstream of described pay-off, comprise knife rest and be fixed on the cutting knife on described knife rest, described knife rest is for by mobile or certainly then make described cutting knife press to described the first barrier film and only described pole piece cut off from described the first barrier film side across described the first barrier film;
Bracing or strutting arrangement, itself and described cutter are oppositely arranged across described the first barrier film, described pole piece and described the second barrier film, with in the time that described cutting knife presses to described the first barrier film at cutting knife described in described the second barrier film supported underneath; And
Coiler device, it is arranged on the downstream of described cutter, for by described the first barrier film, cut described pole piece together with described the second membrane winding.
2. battery pole piece as claimed in claim 1 cuts off equipment, it is characterized in that, described pay-off comprises:
Pole piece feeding device, for sending described pole piece;
The first barrier film pay-off, for sending described the first barrier film, described the first barrier film is covered on a surface of described pole piece;
The second barrier film pay-off, for sending described the second barrier film, described the second barrier film is covered on another surface of described pole piece; And
Guider, is arranged on the downstream of described the first barrier film pay-off, described pole piece feeding device and described the second barrier film pay-off, for described the first barrier film, described pole piece and described the second barrier film are guided to downstream.
3. battery pole piece as claimed in claim 1 cuts off equipment, it is characterized in that, described knife rest is swivelling tool-holder, described cutting knife is fixed on the periphery of described knife rest, described knife rest is arranged to can be by certainly then make described cutting knife press to described the first barrier film, and have the direction of motion identical with described the first barrier film while making described cutting knife press to described the first barrier film.
4. battery pole piece as claimed in claim 3 cuts off equipment, it is characterized in that, the linear velocity of described cutting knife and described feeding speed are basic identical.
5. battery pole piece as claimed in claim 3 cuts off equipment, it is characterized in that, described equipment also has the adjusting device for regulating the gap between described bracing or strutting arrangement and described cutter.
6. battery pole piece as claimed in claim 3 cuts off equipment, it is characterized in that, described bracing or strutting arrangement comprises initiatively runner, and the periphery of described active runner is against described the second barrier film, and the linear velocity of the periphery of described active runner is arranged to identical with the linear velocity of described the second barrier film.
7. battery pole piece as claimed in claim 3 cuts off equipment, it is characterized in that, described bracing or strutting arrangement comprises driven runner, and the periphery of described driven runner is against described the second barrier film, and described driven runner is driven and rotated by described the second barrier film.
8. battery pole piece as claimed in claim 6 cuts off equipment, it is characterized in that, described bracing or strutting arrangement also comprises flexible adjustment member, and described flexible adjustment member is arranged to apply adjustable elastic force and is regulated the pressure between described active runner and described the second barrier film to described active runner.
9. battery pole piece as claimed in claim 7 cuts off equipment, it is characterized in that, described bracing or strutting arrangement also comprises flexible adjustment member, and described flexible adjustment member is arranged to apply adjustable elastic force and is regulated the pressure between described driven runner and described the second barrier film to described driven runner.
10. battery pole piece as claimed in claim 1 cuts off equipment, it is characterized in that, described knife rest is arranged to be moved and to make described cutting knife press to described the first barrier film perpendicular to the direction of described the first barrier film by edge.
11. battery pole pieces as claimed in claim 1 cut off equipment, it is characterized in that the edge of a knife that described cutting knife has the first cutting knife plane, the second cutting knife plane and formed by described the first cutting knife plane and described the second cutting knife Plane intersects.
12. battery pole pieces as claimed in claim 1 cut off equipment, it is characterized in that, described cutting knife has the first cutting knife cambered surface, the second cutting knife cambered surface and intersects by described the first cutting knife cambered surface and described the second cutting knife cambered surface the edge of a knife forming, and described the first cutting knife cambered surface and described the second cutting knife cambered surface are all recessed towards described cutting knife inside.
13. 1 kinds of battery pole piece cutting-off methods, is characterized in that, comprising:
Feeding step, wherein sends the first stacked in turn barrier film, pole piece and the second barrier film with identical feeding speed;
Cut off step, wherein in supporting described the second barrier film, only described pole piece is cut off from described the first barrier film side across described the first barrier film; And
Coiling step, wherein by described the first barrier film, cut described pole piece together with described the second membrane winding.
14. methods as claimed in claim 13, is characterized in that, described method is implemented with battery pole piece cut-out equipment, and described battery pole piece cut-out equipment comprises:
Pay-off, sends the first stacked in turn barrier film, pole piece and the second barrier film for the feeding speed with identical;
Cutter, it is arranged on the downstream of described pay-off, comprise knife rest and be fixed on the cutting knife on described knife rest, described knife rest is for by mobile or certainly then make described cutting knife press to described the first barrier film and only described pole piece cut off from described the first barrier film side across described the first barrier film;
Bracing or strutting arrangement, itself and described cutter are oppositely arranged across described the first barrier film, described pole piece and described the second barrier film, with in the time that described cutting knife presses to described the first barrier film at cutting knife described in described the second barrier film supported underneath; And
Coiler device, it is arranged on the downstream of described cutter, for by described the first barrier film, cut described pole piece together with described the second membrane winding,
Wherein, in described feeding step, described pay-off is sent the first stacked in turn barrier film, pole piece and the second barrier film with identical feeding speed;
In described cut-out step, in making described bracing or strutting arrangement support described the second barrier film, make described knife rest by mobile or certainly then make described cutting knife press to described the first barrier film and only described pole piece cut off from described the first barrier film side across described the first barrier film;
In described coiling step, make described coiler device by described the first barrier film, cut described pole piece together with described the second membrane winding.
15. methods as claimed in claim 14, is characterized in that,
Described knife rest is swivelling tool-holder, described cutting knife is fixed on the periphery of described knife rest, described knife rest is arranged to can be by certainly then make described cutting knife press to described the first barrier film, and have the direction of motion identical with described the first barrier film while making described cutting knife press to described the first barrier film;
In the time carrying out described cut-out step, described feeding step does not stop;
Described cut-out step comprises:
In making described bracing or strutting arrangement support described the second barrier film, make described knife rest autobiography and make described cutting knife press to described the first barrier film and only described pole piece cut off from described the first barrier film side across described the first barrier film, and thering is the direction of motion identical with described the first barrier film while making described cutting knife press to described the first barrier film;
Continue to make described knife rest autobiography and make described cutting knife away from described the first barrier film.
16. methods as claimed in claim 14, is characterized in that,
Described knife rest is arranged to be moved and to make described cutting knife press to described the first barrier film perpendicular to the direction of described the first barrier film by edge;
Described feeding step was suspended and is carried out before carrying out described cut-out step, and restarted after completing described cut-out step;
Described cut-out step comprises:
Make described knife rest along making described cutting knife press to described the first barrier film perpendicular to the direction of described the first barrier film moves and only described pole piece being cut off from described the first barrier film side across described the first barrier film;
Move described knife rest and make described cutting knife away from described the first barrier film.
17. methods as claimed in claim 13, is characterized in that, described pole piece is made up of lithium or lithium alloy, and described the first barrier film and described the second barrier film are made up of porous polymer materials.
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| CN201210295959.3A CN102810660B (en) | 2012-08-17 | 2012-08-17 | Battery pole piece cutting-off equipment and battery pole piece cutting-off method |
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| CN105382345A (en) * | 2015-11-25 | 2016-03-09 | 铜陵市金利电子有限公司 | Stripping blade for lithium pole piece |
| CN107398586B (en) * | 2017-03-03 | 2020-04-28 | 广东省智能制造研究所 | Automatic slicing mechanism for electrode plates of storage battery |
| WO2019148436A1 (en) * | 2018-02-01 | 2019-08-08 | 深圳前海优容科技有限公司 | Device for cutting battery electrode plate and system for cutting and stacking battery electrode plate |
| CN110212154A (en) * | 2019-06-28 | 2019-09-06 | 东莞市超鸿自动化设备有限公司 | Cut folding integrated machine |
| CN114346048B (en) * | 2021-12-22 | 2024-02-20 | 长沙矿冶研究院有限责任公司 | Lithium sheet die cutting equipment and lithium sheet die cutting process |
| CN114408657A (en) * | 2021-12-27 | 2022-04-29 | 珠海华冠科技股份有限公司 | Rotary type pole piece cutter assembly and pole piece cutting mechanism |
| CN114497890B (en) * | 2022-01-27 | 2024-08-30 | 深圳吉阳智能科技有限公司 | Battery cell diaphragm fly-cutting mechanism |
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