JP2012199211A - Production apparatus and production method of electrode laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production apparatus and a production method of an electrode laminate which can enhance the production speed.SOLUTION: The electrode lamination device 1 which produces an electrode laminate by laminating a positive electrode P and a negative electrode N alternately while sandwiching a separator therebetween employs a configuration including a winding drum 3 having an outer peripheral surface 3a around which a separator sheet SS being fed continuously can be wound, and an electrode supply unit 4 which supplies the electrode sequentially at intervals to a valley, formed between the separator sheet SS wound around the outer peripheral surface 3a and a separator sheet SS to be wound around the outer peripheral surface 3a, so that the positive electrode P and the negative electrode N can be switched.

Description

  The present invention relates to an electrode laminate manufacturing apparatus and manufacturing method.

  As an electrode laminate manufacturing apparatus and manufacturing method, for example, Patent Document 1 discloses a secondary battery manufacturing apparatus and manufacturing method. In this prior art, in order to improve the productivity of the lithium secondary battery, electrodes composed of a plurality of positive electrodes and negative electrodes are arranged on a continuous separator (separator sheet) while maintaining a predetermined interval for each electrode. The other continuous separator is superposed on the continuous separator on which the electrodes are arranged, the continuous separators around the electrodes are welded together, and the electrodes are folded so that the positive and negative electrodes are alternately overlapped via the continuous separator. A means for manufacturing a laminate is employed.

JP 2009-9919 A

  However, in the above-described conventional technology, the separator sheet is intermittently operated in order to arrange the electrodes one by one on the separator sheet using the transfer device. For this reason, there exists a problem that the improvement of the production rate of an electrode laminated body is difficult.

  This invention is made | formed in view of the said problem, and provides the manufacturing apparatus and manufacturing method of an electrode laminated body which can aim at the improvement of a production rate.

In order to solve the above-mentioned problems, the present invention is an electrode laminate manufacturing apparatus in which electrodes having different polarities are alternately stacked with separators interposed therebetween, and can continuously wind up separator sheets that are fed out continuously. In the valley formed between the winding drum having an outer peripheral surface, the separator sheet wound around the outer peripheral surface and the separator sheet wound around the outer peripheral surface, the electrode is the first of the electrodes. And a second electrode having a polarity different from that of the first electrode, and an electrode supply device that sequentially supplies the first electrode with an interval therebetween.
By adopting this configuration, in the present invention, the separator sheet is continuously wound around the outer peripheral surface of the winding drum, and the electrodes are sequentially supplied at intervals between the valleys of the sheet formed by winding the sheet. By doing so, the electrodes can be continuously sandwiched without stopping the feeding of the separator sheet. In the present invention, the type of electrode to be supplied can be switched, so that the separator sheet is interposed between the first electrode (for example, positive electrode) and the second electrode (for example, negative electrode) in the radial direction of the take-up drum. It is possible to laminate alternately.

Moreover, in this invention, the said electrode supply apparatus employ | adopts the structure of switching the kind of said electrode supplied to the said trough whenever the said winding drum rotates 1 time.
By adopting this configuration, in the present invention, since the type of the electrode to be supplied is switched every time the winding drum rotates once, the first electrode and the second electrode are arranged in the radial direction of the winding drum. Can be stacked alternately with separator sheets in between.

Moreover, in this invention, the structure of having an adjustment apparatus which adjusts the space | interval of the said electrode supplied to the said valley based on the rotation speed of the said winding drum is employ | adopted.
By adopting this configuration, the outer circumference of the winding drum increases with the diameter every time the winding drum rotates in the present invention. Therefore, by adjusting the interval for supplying the electrode based on the number of rotations of the winding drum, It is possible to prevent relative positional deviation in the circumferential direction between adjacent electrodes across the separator sheet in the direction.

Moreover, in this invention, the structure of having a welding roll which welds the said separator sheet wound up while rotating along the said outer peripheral surface is employ | adopted.
By employ | adopting this structure, in this invention, the continuous welding of the separator sheets wound up by the welding roll is attained.

Moreover, in this invention, the structure of having a 2nd adjustment apparatus which adjusts the relative position of the said winding drum and the said welding roll based on the rotation speed of the said winding drum is employ | adopted.
By adopting this configuration, in the present invention, since the diameter of the winding drum increases each time it rotates, the relative position between the winding drum and the welding roll is adjusted based on the number of rotations of the winding drum. Thus, appropriate welding of the wound separator sheets becomes possible.

Moreover, in this invention, the structure of having the cutter apparatus which cuts out the said separator sheet laminated | stacked on the said outer peripheral surface on both sides by the said radial direction for every said electrode in the circumferential direction is pinched | interposed.
By adopting this configuration, in the present invention, an electrode laminate is obtained by cutting out the laminated separator sheets for each electrode in the circumferential direction.

Further, in the present invention, a biasing member that biases the stacked separator sheets in the radial direction, and a control device that controls driving of the cutter device based on a radial displacement amount of the biasing member. The configuration of having
By adopting this configuration, in the present invention, when the stacked separator sheets are urged in the radial direction, the amount of displacement of the urging member is reduced between the portion where the electrode is sandwiched and the portion where the electrode is not sandwiched. Therefore, by driving the cutter device based on the amount of displacement in the radial direction, the laminated separator sheets can be appropriately cut out for each electrode in the circumferential direction.

  Further, in the present invention, there is provided a method for producing an electrode laminate in which electrodes having different polarities are alternately laminated with a separator interposed therebetween, and a separator sheet that is continuously fed is wound on an outer peripheral surface of a take-up drum. In the valley formed between the step and the separator sheet wound on the outer peripheral surface and the separator sheet wound on the outer peripheral surface, the electrode is connected to the first electrode and the first electrode And a step of sequentially supplying the electrodes and the second electrodes having different polarities so as to be switchable.

According to the present invention, an electrode laminated body manufacturing apparatus in which electrodes having different polarities are alternately stacked with separators interposed therebetween, the winding having an outer peripheral surface capable of winding a separator sheet that is continuously fed out In the valley formed between the drum, the separator sheet wound around the outer peripheral surface, and the separator sheet wound around the outer peripheral surface, the electrode is connected to the first electrode of the electrode and the first electrode By adopting a configuration that includes an electrode supply device that sequentially supplies the electrode and a second electrode having different polarities at intervals, the separator sheet is continuously provided on the outer peripheral surface of the winding drum. Continuous feeding without stopping the feeding of the separator sheet by sequentially feeding the electrodes at intervals between the valleys of the sheet formed by winding and winding the sheet. It can be a sandwich the electrode. In the present invention, the type of the electrode to be supplied can be switched to alternately stack the first electrode and the second electrode with the separator sheet interposed therebetween in the radial direction of the take-up drum. Can do.
Therefore, in the present invention, the production rate of the electrode laminate can be improved.

It is a block diagram which shows the electrode lamination apparatus in embodiment of this invention. It is a block diagram which shows the electrode supply unit in embodiment of this invention. It is a figure which shows the positive electrode cut out with the cutter apparatus in embodiment of this invention. It is a figure which shows the negative electrode cut out with the cutter apparatus in embodiment of this invention. It is a block diagram which shows the cutout unit in embodiment of this invention. It is a block diagram which shows the pressing roll in embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in the following description, the case where the manufacturing apparatus and manufacturing method of the electrode laminated body of this invention are applied to the electrode laminating apparatus which manufactures a lamination-type lithium secondary battery is illustrated.
FIG. 1 is a configuration diagram illustrating an electrode stacking apparatus 1 according to an embodiment of the present invention.

The electrode stacking apparatus 1 includes a separator roll 2 that continuously feeds the separator sheet SS,
Electrode supply for supplying electrodes (positive electrode P, negative electrode N) to a valley formed between the take-up drum 3 for taking up the separator sheet SS to be fed and the separator sheet SS taken up and the separator sheet SS to be taken up A unit (electrode supply device) 4, a welding unit 5 for welding the wound separator sheets SS, an inspection camera 6 for inspecting the wound separator sheets SS, and the above-described components are electrically connected. And a control unit (adjustment device, second adjustment device) CONT having a computer system.

The separator roll 2 is configured to feed out a separator sheet SS made of an insulating resin material having a thickness of about 8 to 25 μm, for example. The separator sheet SS is made of, for example, porous polyethylene or polyester.
The winding drum 3 has an outer peripheral surface 3a that can wind up the separator sheet SS that is continuously fed. The winding drum 3 of this embodiment is composed of a suction drum in which a plurality of suction holes (not shown) are formed on the outer peripheral surface 3a.

  The outer peripheral surface 3a has a size that allows a plurality of electrodes to be arranged at intervals in the circumferential direction. The size of the outer peripheral surface 3a is preferably from the viewpoint of productivity, for example, so that 10 or more electrodes can be arranged at a time. Further, the outer peripheral surface 3a communicates with a pressure chamber (not shown) divided inside the drum for each region where the electrodes are arranged (every predetermined angle), and by controlling the pressure in the pressure chamber, The suction and the reverse injection are possible for each region where the electrodes are arranged.

  A rotary encoder 7 is provided on the rotating shaft of the winding drum 3. The rotary encoder 7 is configured to output data related to the rotation of the winding drum 3 to the control unit CONT. The control unit CONT is configured to calculate the rotation speed, rotation angle, rotation speed, and the like of the winding drum 3 based on the output data from the rotary encoder 7.

FIG. 2 is a configuration diagram showing the electrode supply unit 4 in the embodiment of the present invention.
The electrode supply unit 4 includes a positive electrode cutting unit 10 and a negative electrode cutting unit 20, and is formed between the separator sheet SS wound around the outer peripheral surface 3a and the separator sheet SS wound around the outer peripheral surface 3a. The electrode supplied to the valley is switchable between a positive electrode (first electrode) P and a negative electrode (second electrode) N.

  The positive electrode cutting unit 10 has a positive electrode roll 12 that feeds out the positive electrode sheet PS, cutter devices 13 and 14 that cut out the positive electrode P from the positive electrode sheet PS fed out from the positive electrode roll 12, and the cut out positive electrode P toward the shooter guide 30. A positive electrode supply roll pair 15 to be supplied.

  The positive electrode roll 12 has a configuration in which a positive electrode sheet PS of, for example, a metal foil having a thickness of about 8 to 20 μm, in which a lithium-containing metal oxide is printed (attached) as an active material, is provided. The positive electrode sheet PS is formed by using, for example, an aluminum foil as a base material and arranging a powdery lithium-containing metal oxide on the surface of the base material. The positive electrode sheet PS fed from the positive electrode roll 12 is cut by the cutter devices 13 and 14.

  An inspection camera 16 is provided in the conveyance path between the positive electrode roll 12 and the cutter device 13. The inspection camera 16 is configured to image the positive electrode sheet PS from above and transmit data acquired by the imaging to the control unit CONT. In the control unit CONT, the imaging data is subjected to image processing, and the presence or absence of a defective state of the positive electrode sheet PS (for example, wrinkles, wrinkles, defects (holes or tears), active material peeling, etc.) is inspected.

The cutter devices 13 and 14 include a roll having cutter blades 13a and 14a having a predetermined shape on the peripheral surface, and the cutter blades 13a and 14a are pressed against the positive electrode sheet PS by rotating the roll, thereby continuously positively P is cut out.
FIG. 3 is a diagram showing the positive electrode P cut out by the cutter devices 13 and 14 according to the embodiment of the present invention. In addition, the dashed-dotted line in FIG. 3 shows a cut line.

  As shown in FIG. 3, the cutter device 13 cuts off a part of one end portion in the width direction of the positive electrode sheet PS fed out in the horizontal direction along the cut line C1 to form a tab P1 (first cutting). . The cut piece P2 falls on the tray 17 shown in FIG. Next, after the first cutting, the cutter device 14 cuts the positive electrode sheet PS conveyed along the vertical direction along the cut line C2, and separates the positive electrode P in the longitudinal direction (second cutting). . The size of the positive electrode P is approximately A4 size.

  The positive electrode supply roll pair 15 is disposed below the cutter device 14 and is configured to be able to hold the cut positive electrode P in a posture along the vertical direction. The positive electrode supply roll pair 15 of the present embodiment supplies the clamped positive electrode P by dropping it toward the shooter guide 30 from above in the vertical direction. The interval at which the positive electrode P is supplied is adjusted under the control of the control unit CONT. The positive electrode P dropped from the positive electrode supply roll pair 15 is guided by the shooter guide 30 and supplied toward the valley of the separator sheet SS.

  On the other hand, the negative electrode cutting unit 20 includes a negative electrode roll 22 for feeding the negative electrode sheet NS, cutter devices 23 and 24 for cutting the negative electrode N from the negative electrode sheet NS fed from the negative electrode roll 22, and the cut negative electrode N for the shooter guide 30. And a negative electrode supply roll pair 25 that supplies the negative electrode.

  The negative electrode roll 22 has a configuration in which a negative electrode sheet NS of a metal foil having a thickness of about 8 to 20 μm, for example, having a carbon material printed (attached) on both sides as an active material is fed out. The negative electrode sheet NS is formed by, for example, using copper foil as a base material and arranging powdery carbon on the surface of the base material. The negative electrode sheet NS fed from the negative electrode roll 22 is cut by the cutter devices 23 and 24.

  An inspection camera 26 is provided in the conveyance path between the negative electrode roll 22 and the cutter device 23. The inspection camera 26 is configured to image the negative electrode sheet NS from above and transmit data acquired by the imaging to the control unit CONT. The control unit CONT performs image processing on the imaged data, and inspects whether or not the negative electrode sheet NS is in a defective state (for example, wrinkles, wrinkles, defects (holes or tears), active material peeling, etc.).

The cutter devices 23 and 24 include rolls having cutter blades 23a and 24a having predetermined shapes on the peripheral surfaces, and the cutter blades 23a and 24a are continuously pressed against the negative electrode sheet NS by rotating the rolls, thereby negative electrode continuously. N is cut out.
FIG. 4 is a diagram showing the negative electrode N cut out by the cutter devices 23 and 24 in the embodiment of the present invention. In addition, the dashed-dotted line in FIG. 4 shows a cut line.

  As shown in FIG. 4, the cutter device 23 cuts off a part of one end in the width direction of the negative electrode sheet NS that is fed out in the horizontal direction along the cut line C3 to form a tab N1 (first cutting). . The cut piece N2 falls on the tray 27 shown in FIG. Next, after the first cutting, the cutter device 24 cuts the negative electrode sheet NS conveyed along the vertical direction along the cut line C4 to separate the negative electrode N in the longitudinal direction (second cutting). . The size of the negative electrode N is approximately A4 size like the positive electrode P.

  The negative electrode supply roll pair 25 is disposed below the cutter device 24 and is configured to be able to hold the cut negative electrode N in a posture along the vertical direction. The negative electrode supply roll pair 25 of the present embodiment supplies the negative electrode N that has been sandwiched by dropping sequentially toward the shooter guide 30 from above. The interval at which the negative electrode N is supplied is adjusted under the control of the control unit CONT. The negative electrode N dropped from the negative electrode supply roll pair 25 is guided by the shooter guide 30 and supplied toward the valley of the separator sheet SS in the same manner as the positive electrode P.

  Returning to FIG. 1, the welding unit 5 includes a welding roll 41 having a heater wire (not shown) that welds the separator sheets SS wound while rotating along the outer peripheral surface 3 a of the winding drum 3. The welding roll 41 has a configuration capable of thermally welding at least a portion around the electrode sandwiched between the separator sheets SS. The welding roll 41 is configured to be close to and away from the winding drum 3 by an actuator 42. The actuator 42 moves the welding roll 41 based on the number of rotations of the winding drum 3 under the control of the control unit CONT.

  The inspection camera 6 is configured to image the separator sheet SS on the downstream side of the welding unit 5 and transmit data acquired by the imaging to the control unit CONT. The control unit CONT performs image processing on the captured image data, and inspects the separator sheet SS wound around the winding drum 3 for defects (such as wrinkles, wrinkles, and defects (pinholes and tears)) after welding.

In the electrode laminating apparatus 1 having the above-described configuration, first, the separator sheet SS is fed out from the separator roll 2 and wound around the outer peripheral surface 3a of the winding drum 3 for one round.
When the winding drum 3 winds up the separator sheet SS by one turn, the control unit CONT drives the welding roll 41. The welding roll 41 partially and continuously heat-welds the separator sheets SS wound while rotating along the outer peripheral surface 3 a of the winding drum 3.

  At the same time, the control unit CONT drives the electrode supply unit 4. The electrode supply unit 4 includes an electrode (for example, positive electrode P) in a valley formed between the separator sheet SS wound around the outer peripheral surface 3a of the winding drum 3 and the separator sheet SS wound around the outer peripheral surface 3a. Supplied sequentially at intervals. Specifically, only the positive electrode cutting unit 10 is driven under the control of the control unit CONT, and the positive electrode supply roll pair 15 supplies the cut positive electrode P toward the shooter guide 30 at a predetermined timing.

  The supplied positive electrode P falls from the end of the shooter guide 30 to the valley of the separator sheet SS. The bottom of the valley of the separator sheet SS is thermally welded, and the fallen positive electrode P is positioned. The positioned positive electrode P is continuously sandwiched by the rotation of the winding drum 3 without stopping the feeding of the separator sheet SS. The welding roll 41 closes the positive electrode P substantially in a bag without causing thermal damage to the active material when the separator sheets SS of the portion along the outer edge shape of the positive electrode P are closed by thermal welding. Confined continuously.

  If the bag structure which wraps the positive electrode P with the separator for each positive electrode P to be sequentially supplied is formed continuously for one round (for example, 10 sets) of the winding drum 3, the electrode supply unit 4 determines the type of electrode to be supplied, Switch from positive electrode P to negative electrode N. Specifically, only the negative electrode cutting unit 20 is driven under the control of the control unit CONT, and the negative electrode supply roll pair 25 supplies the cut negative electrode N toward the shooter guide 30 at a predetermined timing. The switching is performed based on the rotation angle of the winding drum 3 calculated from the output data of the rotary encoder 7.

  Further, in the same manner as described above, when the bag structure in which the negative electrode N is wrapped with the separator for each negative electrode N that is sequentially supplied is continuously formed for one round (for example, 10 sets) of the winding drum 3, the electrode supply unit 4 is The type of electrode to be supplied is switched from the negative electrode N to the positive electrode P. In this way, by switching the type of electrode supplied each time the winding drum 3 rotates, the positive electrode P and the negative electrode N are alternately arranged in the radial direction of the winding drum 3 with the separator sheet SS interposed therebetween. Can be laminated. The electrode supply unit 4 performs this switching until a predetermined layer (for example, 100 layers) is formed in the radial direction of the winding drum 3 with the positive electrode P, the separator sheet SS, the negative electrode N, and the separator sheet SS as one layer.

  Further, along with the switching, the control unit CONT adjusts the interval between the electrodes supplied to the valleys of the separator sheet SS based on the number of rotations of the winding drum 3. That is, as the take-up drum 3 rotates, the outer circumference increases with the diameter. Therefore, if the electrodes are continuously supplied at a constant timing, the electrodes adjacent to each other with the separator sheet SS interposed therebetween in the radial direction. This is because a relative displacement may occur. Specifically, the control unit CONT gradually delays the timing of supplying the electrodes based on the number of revolutions of the winding drum 3, so that the positive electrode P and the negative electrode N adjacent to each other with the separator sheet SS interposed therebetween in the radial direction. Prevents relative displacement in the circumferential direction.

  Further, the control unit CONT adjusts the relative position between the winding drum 3 and the welding roll 41 based on the number of rotations of the winding drum 3. That is, each time the winding drum 3 rotates, the diameter increases. Therefore, if the winding drum 3 and the welding roll 41 are always in a certain relative positional relationship, the separator sheet SS is overloaded, and the separator sheet This is because SS can be broken and welding defects can occur. Specifically, the control unit CONT drives the actuator 42 based on the number of rotations of the winding drum 3 and gradually separates the welding roll 41 from the winding drum 3, thereby applying a constant load to the separator sheet SS. Appropriate welding between the separator sheets SS fed and wound is made possible.

When 100 layers of the positive electrode P, the separator sheet SS, the negative electrode N, and the separator sheet SS are formed in the radial direction of the take-up drum 3, the cutter device 43 is driven to cut the separator sheet SS fed out from the separator roll 2 and wind it up. End.
In the next step, cutting is performed using the cutting unit 50 shown in FIG.

FIG. 5 is a configuration diagram showing the cutout unit 50 in the embodiment of the present invention.
The cutting unit 50 includes a pressing roll 51 and a cutter device 52 disposed on the pressing roll 51 side. The cutter device 52 has a configuration in which a separator sheet SS, which is laminated in the radial direction with an electrode between the outer peripheral surface 3a of the winding drum 3, is cut out for each electrode in the circumferential direction. Under the control of the control unit CONT (not shown in FIG. 5, refer to FIG. 1), the cutter device 52 avoids the area where the electrodes are arranged and cuts out the place where only the separator sheet SS is arranged. The location where only the separator sheet SS is disposed can be derived from the rotation angle of the winding drum 3. In addition, as a cutter blade, an optimal thing is suitably selected according to thickness and material, such as a heat cutter and an ultrasonic cutter.

The electrode laminate C cut out by the cutting unit 50 is detached from the outer peripheral surface 3a of the take-up drum 3 by air reverse injection or the like, warped by the roll 53, and conveyed to the next process by the conveyor device 54. . In addition, the data judged to be in a defective state by the inspection by the inspection camera 6, the inspection camera 16, and the inspection camera 26 are recorded in the control unit CONT, and the control unit CONT Then, it is discarded by a robot hand or pusher (not shown) without being transferred to the next process.
In the next step, the tabs of the positive electrode P and the negative electrode N are welded, the electrode laminate C is placed in a laminate film made of, for example, aluminum, an electrolyte is injected, and the electrode laminate C is impregnated. Thereafter, the laminate type battery cell is obtained by sealing and sealing.

Therefore, according to the above-described embodiment, the positive electrode P and the negative electrode N are electrode stacking apparatuses 1 for manufacturing an electrode stack in which the separators are alternately stacked, and the separator sheet SS that is continuously drawn out In the valley formed between the winding drum 3 having the outer peripheral surface 3a that can wind up the separator sheet SS wound around the outer peripheral surface 3a and the separator sheet SS wound around the outer peripheral surface 3a, the electrode , The separator sheet SS is continuously provided on the outer peripheral surface 3a of the take-up drum 3 by adopting a configuration in which the positive electrode P and the negative electrode N are switchable and the electrode supply unit 4 is sequentially supplied at intervals. The separator sheet SS is fed by sequentially supplying electrodes at intervals between the valleys of the sheet formed by winding the sheet. Ri can sandwich the continuous electrode without stopping. Further, in the present embodiment, the type of electrode to be supplied can be switched, whereby the positive electrode P and the negative electrode N can be alternately stacked in the radial direction of the take-up drum 3 with the separator sheet SS interposed therebetween. it can.
Therefore, in this embodiment, the production rate of the electrode laminate can be improved.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above-described embodiment, the control unit CONT controls the driving of the cutter device 52 based on the rotation angle of the winding drum 3 and cuts out the place where only the separator sheet SS is arranged. Is not limited to this configuration. For example, as shown in FIG. 6, a configuration in which only a portion where only the separator sheet SS is disposed may be actually detected and cut out.
FIG. 6 is a configuration diagram showing a pressing roll 51 in another embodiment. The pressing roll 51 includes a biasing member 60 that biases the stacked separator sheets SS in the radial direction, and a displacement measurement sensor 61 that measures the radial displacement of the biasing member 60. The displacement measurement sensor 61 is configured to output measurement data to a control unit (control device) CONT (not shown in FIG. 6). According to this configuration, when the laminated separator sheet SS is urged in the radial direction, the electrode (positive electrode P, negative electrode N) is sandwiched between the portions (see FIG. 6A) and the electrode is not sandwiched. Since the displacement amount of the urging member 60 is different at the site (see FIG. 6B), a location where only the separator sheet SS is arranged can be detected based on the displacement amount. Therefore, the control part CONT can cut out the laminated separator sheets SS for each electrode in the circumferential direction by driving the cutter device 52 based on the displacement amount.

  Further, for example, in the above-described embodiment, the electrode supply unit 4 has been described as switching the type of electrode to be supplied every time the winding drum 3 rotates, but the present invention is not limited to this configuration. For example, if the number of electrodes that can be arranged in the circumferential direction of the outer peripheral surface 3a of the winding drum 3 is an odd number, the electrode supply unit 4 may supply the positive electrode P and the negative electrode N alternately. Good. According to this configuration, since the arrangement in the circumferential direction of the positive electrode P and the negative electrode N is switched every time it circulates, the positive electrode P and the negative electrode N can be alternately stacked with the separator sheet SS interposed therebetween.

  Further, for example, in the above-described embodiment, the configuration in which the electrode supply unit 4 includes the positive electrode cutting unit 10 and the negative electrode cutting unit 20 has been described. However, the present invention is not limited to this configuration. A configuration may be adopted in which a plurality of positive electrodes P and negative electrodes N are stocked and supplied. The shooter guide 30 may be provided corresponding to the positive electrode P and the negative electrode N, respectively.

  Further, for example, in the above-described embodiment, the relative position between the winding drum 3 and the welding roll 41 is adjusted by driving the actuator 42 and moving the welding roll 41 based on the number of rotations of the winding drum. However, the structure which moves the winding drum 3 side, for example may be sufficient.

  Further, for example, an actuator for adjusting the position and angle of the shooter guide 30 based on the number of rotations of the take-up drum may be further provided, or the electrode supply unit 4 itself is mounted on a slide table and moved. It may be adopted.

  For example, in the above embodiment, the outer periphery of the winding drum 3 is circular. However, for example, the outer periphery of the winding drum 3 may be a polygon. In this case, it is good also as a structure which drives the actuator 42 according to the rotation angle of the winding drum 3, and makes the welding roll 41 go in and out along a contact radius.

  DESCRIPTION OF SYMBOLS 1 ... Electrode laminating apparatus (electrode laminated body manufacturing apparatus), 3 ... Winding drum, 3a ... Outer peripheral surface, 4 ... Electrode supply unit (electrode supply apparatus), 41 ... Welding roll, 52 ... Holding roll (urging member) 53 ... Cutter device, N ... Negative electrode (second electrode), P ... Positive electrode (first electrode), SS ... Separator sheet, CONT ... Control unit (adjustment device, second adjustment device, control device)

Claims (8)

An electrode laminate manufacturing apparatus in which electrodes having different polarities are alternately stacked with separators in between,
A take-up drum having an outer peripheral surface capable of winding up a separator sheet that is continuously fed;
In the valley formed between the separator sheet wound on the outer peripheral surface and the separator sheet wound on the outer peripheral surface, the electrode is connected to the first electrode and the polarity of the first electrode. An electrode supply device that sequentially supplies the second electrodes with different intervals so as to be switchable,
An apparatus for producing an electrode laminate, comprising:   2. The electrode laminate manufacturing apparatus according to claim 1, wherein the electrode supply device switches the type of the electrode supplied to the valley every time the winding drum rotates once.   3. The electrode laminate manufacturing apparatus according to claim 1, further comprising an adjusting device that adjusts an interval between the electrodes supplied to the valley based on the number of rotations of the winding drum.   The apparatus for manufacturing an electrode laminate according to any one of claims 1 to 3, further comprising a welding roll for welding the wound separator sheets while rotating along the outer peripheral surface.   5. The electrode laminate manufacturing apparatus according to claim 4, further comprising: a second adjusting device that adjusts a relative position between the winding drum and the welding roll based on the number of rotations of the winding drum. .   6. The apparatus according to claim 1, further comprising a cutter device that cuts the separator sheets, which are stacked in the radial direction with the electrodes sandwiched between the outer peripheral surfaces, for each of the electrodes in the circumferential direction. The manufacturing apparatus of the electrode laminated body as described in a term. A biasing member that biases the stacked separator sheets in a radial direction;
The apparatus for manufacturing an electrode laminate according to claim 6, further comprising: a control device that controls driving of the cutter device based on a radial displacement amount of the urging member. A method for producing an electrode laminate in which electrodes of different polarities are alternately laminated with a separator in between,
A step of winding the separator sheet continuously fed around the outer peripheral surface of the winding drum;
In the valley formed between the separator sheet wound on the outer peripheral surface and the separator sheet wound on the outer peripheral surface, the electrode is connected to the first electrode and the polarity of the first electrode. A step of sequentially supplying the second electrodes with different intervals so as to be switchable,
A method for producing an electrode laminate, comprising:

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