JP5670930B2 - Winding device - Google Patents

Description

  The present invention relates to a winding device for obtaining a winding element incorporated in, for example, a secondary battery.

  For example, a battery element used as a secondary battery such as a lithium ion battery has two separators in which a positive electrode sheet coated with a positive electrode active material and a negative electrode sheet coated with a negative electrode active material are made of an insulating material. It is wound and manufactured in a state where it is overlapped via.

  In the winding device for manufacturing the battery element, the electrode sheets and the separators supplied from the roll wound in a roll are each conveyed along a separate conveyance path to a winding unit, Each electrode sheet and each separator are wound in a state of being overlapped at the winding portion.

  As a configuration of the winding unit, for example, a turret provided rotatably, and a plurality of cores provided so as to be rotatable while being arranged at predetermined intervals along the rotation direction of the turret. Are known (see, for example, Patent Document 1).

  In such a configuration, first, two separators are wound around the first winding core in the first position (winding position) to some extent, and then both positive and negative electrode sheets are inserted between the separators. Start winding.

  Then, once each electrode sheet is wound for a predetermined length, the winding is temporarily stopped, and each electrode sheet is cut after being gripped by a predetermined gripping means.

  After that, by rotating the turret without cutting the separator, the first core with the separator connected is moved to the second position (removal position) and nothing is wound. Move the 2-core to the first position.

  Here, the separator is in a state of being spanned between the first core that has moved to the second position and the second core that has moved to the first position. Then, for example, the separator is fixed by winding it around the second core, and the separator is cut between both cores. Then, the winding | wrapping operation | work of a series of battery elements about the said 1st core is completed by winding the terminal part (unwinding part) of a separator around a 1st core.

JP 2009-289661 A

  However, in the related art described in Patent Document 1, after the separator is cut, when the end portion of the separator is wound around the first core, the end portion of the separator is not held at all and is free. It is in a state. For this reason, there is a possibility that the separator may cause winding deviation (position deviation in the width direction) due to the influence of the habit or static electricity of the separator itself, and there is a concern that the quality of the product may deteriorate.

  This invention is made | formed in view of the said situation, The objective is to provide the winding apparatus which can suppress the winding shift | offset | difference of a separator and can suppress the quality fall of the winding element obtained. .

  Hereinafter, each means suitable for solving the above-described problem will be described separately. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. A winding device for winding and winding a belt-like positive and negative electrode sheet coated with an active material and a belt-like separator made of an insulating material,
A turret provided so as to be rotatable about its central axis as a rotation axis;
A plurality of winding cores that are arranged at predetermined intervals in the rotation direction of the turret, and each of which can be wound around the electrode sheet and the separator by rotating around its own central axis,
After winding the electrode sheet and the separator continuously supplied from a predetermined supply mechanism for a predetermined length with respect to the first core in the first position among the plurality of cores, the turret is rotated, and the first winding Turret control means for moving the core to the second position and moving the second core different from the first core to the first position;
Sheet cutting means for cutting the terminal portion of the electrode sheet wound around the first core at least before the first core moves to the second position;
Fixing means for fixing the separator to the second core moved to the first position;
A pair of gripping means capable of gripping the separator connected between the first core located in the second position and the second core located in the first position;
Separator cutting means capable of cutting the separator between a position held by the holding means and a position fixed to the second core;
After winding the separator, when the unwinding portion of the separator is wound by the first winding core located at the second position, the gripping means that grips the unwinding portion is moved toward the first winding core. Guide means for enabling movement;
Tension applying means for applying a predetermined tension to the unwinding portion of the separator in a direction opposite to the winding direction when the gripping means moves toward the first winding core. Winding device.

  According to the means 1, first, the electrode sheet and the separator are wound around the first core in the first position, and the electrode sheet is cut when the electrode sheet and the separator are wound for a predetermined length. Then, by rotating the turret without cutting the separator, the first core moves to the second position while the separator is connected, and the second core that has not been wound is Move to the first position. Here, the separator is in a state of being spanned between the first core that has moved to the second position and the second core that has moved to the first position. Then, the separator is welded and fixed to the second core, and the separator is gripped by the gripping means between the first core and the second core, and then cut. After the separator is cut, winding of the unwinding portion of the separator is started by the first core located at the second position. At this time, the unwinding portion of the separator is wound around the first core along the guide means while being applied with a tension in a direction opposite to the winding direction while being held by the gripping means. It will be.

  As a result, it is possible to suppress the winding deviation of the separator and to suppress the deterioration of the quality of the obtained winding element.

  Furthermore, according to this means, it is the structure which moves a some core and performs winding sequentially. That is, a new winding can be performed on the second core at the same time that the unwinding portion of the separator is wound around the first core. As a result, productivity can be improved as compared with a winding device having only one winding core.

  Mean 2. 2. The winding device according to claim 1, wherein two winding cores of the first winding core and the second winding core are provided at intervals of 180 ° in the rotation direction of the turret.

  In recent years, since winding elements such as lithium ion battery elements tend to be larger, a device having a plurality of cores with high production efficiency so that a larger winding element can be wound on one winding core. Among these, an apparatus having a relatively small number of cores is required. However, as the number of winding cores decreases and the distance between the first position and the second position becomes longer, the length of the unwinding portion of the separator becomes longer, and the above-described problem may become more remarkable. That is, among the apparatuses having a plurality of cores, the above problem is most likely to appear when there are two cores. Therefore, the effect of the means 1 is more effective under the configuration of the means 2.

Means 3. The pair of gripping means includes a turret side gripping means disposed on the turret, and a movable gripping means provided so as to be movable forward and backward with respect to the turret side gripping means.
The winding device according to means 1 or 2, wherein the turret is provided with a plurality of turret side gripping means corresponding to the plurality of winding cores.

  According to the means 3, the turret is provided with turret side gripping means corresponding to each core, so that each time the core moves to each position, the position of each turret side gripping means is adjusted according to the separator. There is no need to detect the position of the separator with a sensor. As a result, an increase in the number of parts and a complicated configuration can be suppressed.

It is a schematic front view which shows a winding apparatus. It is a partial enlarged front view which shows the winding part etc. after the cutting | disconnection of an electrode sheet. It is a partial enlarged front view which shows the winding part etc. during turret rotation. FIG. 4 is a partially enlarged front view showing a wound part and the like in a state where a separator is stretched between a winding core at a removal position and a winding core at a winding position. It is the elements on larger scale which show the winding part etc. in the state where the separator was grasped by the grasping mechanism. It is a partial enlarged front view which shows the winding part etc. at the time of a separator cutting | disconnection. It is a partial expanded front view which shows the winding part etc. of the state which has wound up the terminal part of the separator on the core of the removal position. It is a partial expanded front view which shows the winding part etc. of the state which wants to hold the terminal part of a separator with a pressing roller. It is a cross-sectional schematic diagram which shows the structure of a battery element.

  Hereinafter, an embodiment will be described with reference to the drawings. First, the structure of the lithium ion battery element as a winding element obtained by the winding apparatus of this embodiment is demonstrated.

  As shown in FIG. 9, the lithium ion battery element 1 (hereinafter simply referred to as “battery element 1”) is a state in which the positive electrode sheet 4 and the negative electrode sheet 5 are superposed via two separators 2 and 3. It is manufactured by being wound in. In FIG. 9, for convenience of explanation, the separators 2 and 3 and the electrode sheets 4 and 5 (hereinafter collectively referred to as “various sheets 2 to 5”) are shown spaced apart from each other.

  The separators 2 and 3 each have a strip shape having the same width, and an insulator such as polypropylene (PP) is used to prevent the different electrode sheets 4 and 5 from contacting each other to cause a short circuit. It is configured.

  The electrode sheets 4 and 5 are made of thin metal sheets and have substantially the same width as the separators 2 and 3. Moreover, the active material is apply | coated to the front and back both surfaces of the electrode sheets 4 and 5. FIG. For example, an aluminum foil sheet is used as the positive electrode sheet 4, and a positive electrode active material is applied to both the front and back surfaces. For example, a copper foil sheet is used for the negative electrode sheet 5, and a negative electrode active material is applied to both the front and back surfaces. And ion exchange between the positive electrode sheet 4 and the negative electrode sheet 5 can be performed through the active material. More specifically, ions move from the positive electrode sheet 4 side to the negative electrode sheet 5 side during charging, and ions move from the negative electrode sheet 5 side to the positive electrode sheet 4 side during discharging.

  A plurality of positive leads (not shown) extend from one edge of the positive electrode sheet 4 in the width direction, and a plurality of negative leads (not shown) extend from the other edge of the negative electrode sheet 5 in the width direction.

  In obtaining a lithium ion battery, the wound battery element 1 is disposed in a metallic battery container (not shown), and the positive electrode lead and the negative electrode lead are combined. Then, the combined positive lead is connected to a positive terminal component (not shown), and the same negative lead is connected to a negative terminal component (not shown), and both terminal components are open at both ends of the electric container. The lithium ion battery can be obtained by being provided so as to be closed.

  Next, the winding device 10 for manufacturing the battery element 1 will be described.

  As shown in FIG. 1, the winding device 10 includes a winding unit 11 for winding various sheets 2 to 5, and a positive electrode sheet supply mechanism 31 for supplying the positive electrode sheet 4 to the winding unit 11. And a negative electrode sheet supply mechanism 41 for supplying the negative electrode sheet 5 to the winding unit 11, and separator supply mechanisms 51 and 61 for supplying the separators 2 and 3 to the winding unit 11, respectively. . Various mechanisms in the winding device 10 such as the winding unit 11 and the supply mechanisms 31, 41, 51, 61 are controlled by a control device (not shown).

  The positive electrode sheet supply mechanism 31 includes a positive electrode sheet raw fabric 32 in which the positive electrode sheet 4 is wound in a roll shape, sheet insertion means 33 for supplying the positive electrode sheet 4 to the winding unit 11, A sheet cutting cutter 34 as a sheet cutting means for cutting the electrode sheet 4 is provided.

  The positive electrode sheet original fabric 32 is supported so as to be freely rotatable, and the positive electrode sheet 4 is appropriately pulled out from here.

  The sheet insertion means 33 is configured to be movable along a supply path of the positive electrode sheet 4 to an approach position that approaches the winding part 11 and a separation position that is separated from the winding part 11. A pair of chucks 33 </ b> R capable of sandwiching the positive electrode sheet 4 is provided at the tip of the sheet insertion means 33.

  When the positive electrode sheet 4 is supplied to the winding part 11, the sheet insertion means 33 is brought close to the winding part 11 after the vicinity of the start end part of the positive electrode sheet 4 is held by the chuck 33 </ b> R. Thus, the starting end portion of the positive electrode sheet 4 is inserted between the separators 2 and 3 fixed to the cores 13 and 14 described later.

  The sheet cutting cutter 34 includes a pair of blade portions positioned above and below the positive electrode sheet 4. The sheet cutting cutter 34 is movably provided between a sheet cutting position where the pair of blade portions sandwich the positive electrode sheet 4 and a retreat position where the positive electrode sheet 4 is retracted out of the supply path. Yes. When the sheet insertion means 33 moves closer to the winding part 11 side so as to supply the positive electrode sheet 4 to the winding part 11, the sheet insertion means 33 is separated from the supply path of the positive electrode sheet 4. 33 movement is not hindered. The positive electrode sheet 4 is cut in a state where the positive electrode sheet 4 is held by the chuck 33R.

  Similar to the positive electrode sheet supply mechanism 31, the negative electrode sheet supply mechanism 41 includes a negative electrode sheet original 42, a sheet insertion means 43 (a pair of chucks 43R), a sheet cutting cutter 44, and the like. The various configurations of the negative electrode sheet supply mechanism 41, such as the sheet insertion means 43 and the sheet cutting cutter 44, are the same as those of the positive electrode sheet supply mechanism 31, and a detailed description thereof will be omitted.

  On the other hand, the separator supply mechanisms 51 and 61 are provided with original separators 52 and 62 in which the separators 2 and 3 are wound in a roll shape, respectively.

  The separator webs 52 and 62 are supported so as to be freely rotatable, and the separators 2 and 3 are appropriately pulled out therefrom.

  Further, in the middle of the supply path of the various sheets 2 to 5, a tension applying mechanism (not shown) for preventing the looseness of the various sheets 2 to 5 and various guide rollers for guiding the various sheets 2 to 5, respectively. (Reference number omitted) is also provided.

  As shown in FIG. 2 and the like, the winding unit 11 includes a disc-shaped turret 12 rotatably provided by a driving mechanism (not shown) and two winding cores provided at intervals of 180 ° in the rotation direction of the turret 12. 13 and 14, a gripping mechanism 15 for gripping the separators 2 and 3, and a separator cutter 16 as a separator cutting means for cutting the separators 2 and 3.

  The winding cores 13 and 14 are for winding the various sheets 2 to 5 on the outer peripheral side of the winding cores 13 and 14, respectively, and are configured to be rotatable about their own central axis as a rotation axis by a driving mechanism (not shown). Further, the winding cores 13 and 14 are provided so as to be able to appear and retract with respect to the turret 12 along the axial direction of the turret 12.

  Each of the winding cores 13 and 14 is composed of a pair of core pieces extending along its own axial direction, and is configured such that the separators 2 and 3 can be sandwiched between the pair of core pieces. The function of sandwiching the separators 2 and 3 constitutes the fixing means in this embodiment.

  The winding cores 13 and 14 are configured to be capable of turning between a winding position P1 as a first position and a removal position P2 as a second position, as the turret 12 rotates. Accordingly, the function of the control device that controls the turret 12 constitutes the turret control means in the present embodiment.

  The winding position P1 is a position where the various sheets 2 to 5 are wound around the winding cores 13 and 14, and the various sheets 2 to 2 are respectively supplied from the supply mechanisms 31, 41, 51 and 61 to the winding position P1. 5 will be supplied.

  The removal position P <b> 2 is a position for removing the various sheets 2 to 5 after winding, that is, the battery element 1.

  In order to remove the battery element 1 from the presser roller 17 (see FIG. 8) and the winding cores 13 and 14 for preventing the various sheets 2 to 5 after winding from being scattered at the periphery of the removal position P2. A detaching device (not shown) is provided.

  The gripping mechanism 15 includes a movable gripping part 21 provided so as to be operable by a driving mechanism (not shown), and a pair of fixed gripping parts 22A and 22B fixed to the turret 12 so as to rotate together with the turret 12. .

  The movable gripping portion 21 includes a gripping position approaching the central portion of the turret 12 along the radial direction of the turret 12 (in this embodiment, a direction inclined at 45 ° obliquely with respect to the horizontal and vertical directions), and the center of the turret 12. It is configured to be movable to a retracted position that is separated from the part.

  The pair of fixed grip portions 22 </ b> A and 22 </ b> B are arranged so as to be point-symmetric with each other about the rotation axis of the turret 12.

  The movable gripping part 21 and the pair of fixed gripping parts 22A and 22B are respectively a gripping piece 131 as a gripping means for gripping the separators 2 and 3, and a guide as a guide means for linearly sliding the gripping piece 131. A rail 132 and a coil spring 133 as tension applying means for urging the grip piece 131 toward one end of the guide rail 132 are provided. Here, the grip piece 131 of the movable grip portion 21 constitutes a movable grip means, and the grip pieces 131 of the fixed grip portions 22A and 22B constitute a turret side grip means.

  The guide rails 132 of the fixed gripping portions 22A and 22B are provided substantially in parallel with a straight line connecting the core 13 and the core 14, respectively. As a result, each gripping piece 131 slides between a position approaching the core 13 and a position approaching the core 14. In the present embodiment, normally, the grip piece 131 of one fixed grip portion 22A is biased toward the core 13, and the grip piece 131 of the other fixed grip portion 22B is biased toward the core 14. ing.

  Then, with the winding cores 13 and 14 positioned at the winding position P1 or the removal position P2, the movable gripping portion 21 approaches the fixed gripping portions 22A and 22B, so that the gripping piece 131 of the movable gripping portion 21 is fixed. The separators 2 and 3 can be gripped by one gripping piece 131 of the gripping portions 22A and 22B. Here, both gripping pieces 131 that have gripped the separators 2 and 3 are biased toward the winding position P1.

  Further, each gripping piece 131 is biased toward the gripping surface by a coil spring 134 in order to obtain a constant gripping force.

  The separator cutter 16 moves up and down in the vicinity of the winding position P 1, a cutting position that approaches the turret 12 and cuts the separators 2 and 3, and a retreat position that is separated from the turret 12 and does not hinder the movement of the winding cores 13 and 14. It is configured to be movable to. The cutting position for cutting the separators 2 and 3 is set downstream of the winding position P1 and upstream of the gripping mechanism 15 with respect to the longitudinal direction of the separators 2 and 3.

  Next, about the manufacturing method of the battery element 1 using the said winding apparatus 10, winding of the various sheets 2-5 for one battery element was substantially completed with respect to one core 13 as a 1st core. A detailed description will be given along the process from the stage to the start of winding the various sheets 2 to 5 on the other core 14 as the second core.

  As shown in FIG. 1, when the various sheets 2 to 5 are wound on the one winding core 13 at the winding position P1 by a predetermined length, the winding operation by the winding core 13 is temporarily stopped. In this state, the electrode sheets 4 and 5 are gripped by the sheet insertion means 33 and 43 (chucks 33R and 43R), and then cut by the sheet cutting cutters 34 and 44.

  When the cutting of the electrode sheets 4 and 5 is completed, the core 13 is rotated by a predetermined amount, and the terminal portions (remaining portions) of the electrode sheets 4 and 5 are wound together with the separators 2 and 3 (see FIG. 2).

  When the winding of the end portions of the electrode sheets 4 and 5 is completed, the turret 12 rotates without cutting the separators 2 and 3. Thereby, one core 13 moves to the removal position P2 side while pulling out the separators 2 and 3, and the other core 14 moves to the winding position P1 side in a state of being immersed in the turret 12. (See FIG. 3).

  When the winding cores 13 and 14 reach the removal position P2 and the winding position P1, respectively, the turret 12 stops and the winding core 14 protrudes from the turret 12 at the winding position P1 to collect the separators 2 and 3 together. Grip (see FIG. 4).

  When the separators 2 and 3 are fixed to the core 14 by the gripping, the movable gripping portion 21 of the gripping mechanism 15 approaches the fixed gripping portion 22B, and the gripping piece 131 of the movable gripping portion 21 and the fixed gripping portion 22B The separators 2 and 3 are held by the holding piece 131 (see FIG. 5). Thus, the separators 2 and 3 are in a state of being spanned between the core 13 at the removal position P2 and the core 14 at the winding position P1.

  In this state, the separator cutter 16 descends, and the separators 2 and 3 are cut between the gripping mechanism 15 (both gripping pieces 131) and the core 14 at the winding position P1 (see FIG. 6).

  After the cutting, the winding core 13 at the removal position P2 is rotated, and winding of the end portions of the separators 2 and 3 is started. At this time, the gripping piece 131 of the movable gripping part 21 that grips the terminal portions of the separators 2 and 3 wound around the winding core 13 and the gripping piece 131 of the fixed gripping part 22B are moved by the movements of the separators 2 and 3, respectively. As a result, the coil spring 133 moves toward the winding core 13 (removal position P2) against the urging force (see FIG. 7). Thus, the end portions of the separators 2 and 3 can be wound up while applying tension to the end portions of the separators 2 and 3.

  When the gripping piece 131 of the movable gripping part 21 and the gripping piece 131 of the fixed gripping part 22B reach the slide limit position on the winding core 13 (removal position P2) side, the pressing roller 17 presses the vicinity of the end portions of the separators 2 and 3. (See FIG. 8).

  Note that the presser roller 17 in this embodiment also has a function of a tape applying means for applying a fixing tape (not shown) for fastening the end portions of the separators 2 and 3. For example, in the present embodiment, a suction hole communicating with a predetermined suction device is provided on the outer peripheral surface of the presser roller 17, and the fixing tape can be sucked and held by the suction hole.

  Then, the movable gripping portion 21 is separated from the fixed gripping portion 22 </ b> B in a state where the vicinity of the end portions of the separators 2 and 3 is pressed together with the fixed tape sucked and held by the presser roller 17. Accordingly, the gripping by the gripping piece 131 of the movable gripping part 21 and the gripping piece 131 of the fixed gripping part 22B is finished, and the terminal portions of the separators 2 and 3 are opened. Here, the gripping piece 131 of the movable gripping part 21 and the gripping piece 131 of the fixed gripping part 22B are returned to the winding core 14 (winding position P1) side by the biasing force of the coil spring 133, respectively.

  Subsequently, the core 13 is rotated by the press roller 17 while the vicinity of the end portions of the separators 2 and 3 is pressed together with the fixed tape that is sucked and held. As a result, the presser roller 17 is driven, and the end portions of the separators 2 and 3 are completely wound up without being separated, and a fixing tape is applied to the end portions of the separators 2 and 3.

  Thus, by winding separators 2 and 3, winding operation of various sheets 2 to 5 is completed, and battery element 1 is completed. The battery element 1 is removed from the core 13 by a removal device (not shown).

  After the separators 2 and 3 are cut, the winding work is performed on the end portions of the separators 2 and 3 at the removal position P2 described above, and at the same time, the winding core 14 is rotated at the winding position P1. Starts winding of the start end portions of the separators 2 and 3 held by the holder (see FIG. 7).

  When the predetermined timing arrives, the sheet insertion means 33 and 43 (chucks 33R and 43R) holding the electrode sheets 4 and 5 are moved by the electrode sheet supply mechanisms 31 and 41 to the core 14 at the winding position P1. By moving toward the direction, the starting end portions of the electrode sheets 4 and 5 are inserted between the separators 2 and 3, respectively.

  At the same time, when the chucks 33R and 43R are opened, the electrode sheets 4 and 5 are wound between the separators 2 and 3, and winding is started (see FIG. 8).

  Thereafter, the above-described steps are repeated, and the various sheets 2 to 5 are alternately wound around the cores 13 and 14, whereby the battery elements 1 are sequentially manufactured.

  As described in detail above, according to the present embodiment, after the separators 2 and 3 are cut, the winding ends 13 of the separators 2 and 3 are wound by the winding core 13 located at the removal position P2. While the end portion is held by the grip piece 131 of the movable grip portion 21 and the grip piece 131 of the fixed grip portion 22B, tension is applied to the guide rail 132 while applying tension in the direction opposite to the winding direction. Along the winding core 13.

  As a result, the winding shift of the separators 2 and 3 can be suppressed, and the quality deterioration of the battery element 1 obtained can be suppressed.

  Furthermore, according to this embodiment, it has the structure which moves the some cores 13 and 14 and performs winding sequentially. That is, at the same time as winding the end portions of the separators 2 and 3 around the core 13, a new winding can be performed on the core 14. As a result, productivity can be improved as compared with a winding device having only one winding core.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the battery device 1 of the lithium ion battery is manufactured by the winding device 10, but the winding device manufactured by the winding device 10 is not limited to this. For example, Alternatively, a wound element or the like of an electrolytic capacitor may be manufactured.

  (B) In the above-described embodiment, the case where the battery element 1 of a type that does not have the core is obtained is specified. However, the case where the battery element 1 includes the core may be specified. That is, it is good also as a structure which attaches a core core to the cores 13 and 14, and winds the various sheets 2-5 around the said core core.

  (C) In the above embodiment, the cores 13 and 14 having a substantially circular cross section are employed. However, the shape of the cores 13 and 14 is not limited to this, and for example, an elliptical cross section or an oval cross section. A core having a non-circular cross section such as a shape, a polygonal cross section, or a flat cross section may be employed.

  (D) The material of the separators 2 and 3 and the electrode sheets 4 and 5 is not limited to the said embodiment. For example, in the above embodiment, the separators 2 and 3 are made of PP, but the separators 2 and 3 may be made of other insulating materials.

  (E) In the above-described embodiment, the winding unit 11 includes the two winding cores 13 and 14, but the number of winding cores is not limited thereto, and three or more windings are provided. It is good also as a structure provided with the core.

  (F) In the above embodiment, the winding cores 13 and 14 are constituted by a pair of core pieces, and the separators 2 and 3 are sandwiched by the pair of core pieces. However, the fixing means for fixing the separators 2 and 3 is as follows. However, it is not limited to such a configuration.

  For example, a configuration may be adopted in which a slit is formed in a rod-shaped winding core, and the separators 2 and 3 are fixed by inserting the separators 2 and 3 into the slit and rotating the winding core somewhat. When the separators 2 and 3 are made of a resin material or the like, the separators 2 and 3 may be thermally welded to the core core or the like. Of course, tape bonding may be performed on the core core.

  (G) In the above-described embodiment, the gripping mechanism 15 is provided with a movable gripping part 21 that can be operated by a driving mechanism (not shown), and a pair of fixed gripping parts 22A that are fixed to the turret 12 so as to rotate together with the turret 12. , 22B. The configuration of the gripping mechanism 15 is not limited to the above embodiment. For example, a pair of chucks that can hold the separators 2 and 3 may be provided independently of the turret 12. According to such a configuration, since the chuck that holds the separators 2 and 3 is not rotationally displaced together with the turret 12, the alignment accuracy and the like can be improved.

  (H) The guide rail 132 in the above embodiment is configured so that each gripping piece 131 moves linearly, but the configuration of the guide means is not limited to this. For example, each grip piece 131 may be configured to move in an arc shape toward the removal position P2.

  (I) In the above embodiment, the coil spring 133 is employed as the tension applying means for the separators 2 and 3, but not limited thereto, for example, a tension applying means using air pressure, exhaust resistance, magnetism or the like is employed. May be.

  (J) In the above embodiment, the presser roller 17 is configured to have a function of a tape applying means for applying a fixing tape for fastening the end portions of the separators 2 and 3. It is good also as a structure which provided the sticking means separately.

  (K) In the above embodiment, when the cutting of the electrode sheets 4 and 5 is completed, the winding core 13 rotates by a predetermined amount at the winding position P1, and the terminal portions of the electrode sheets 4 and 5 are wound together with the separators 2 and 3. However, the present invention is not limited to this. For example, after the core 13 is moved to the removal position P2, and the separators 2 and 3 are cut, the terminal portions of the electrode sheets 4 and 5 are terminated together with the terminal portions of the separators 2 and 3. It is good also as a structure which winds up a part. With this configuration, productivity can be further improved.

  DESCRIPTION OF SYMBOLS 1 ... Battery element, 2, 3 ... Separator, 4 ... Positive electrode sheet, 5 ... Negative electrode sheet, 10 ... Winding device, 11 ... Winding part, 12 ... Turret, 13, 14 ... Core, 15 ... Holding Mechanism: 16 ... Separator cutter, 21 ... Movable gripper, 22A, 22B ... Fixed gripper, 31 ... Positive electrode sheet supply mechanism, 41 ... Negative electrode sheet supply mechanism, 34, 44 ... Sheet cutting cutter, 51, 61 ... Separator Supply mechanism 131... Gripping piece 132 132 guide rail 133 133 coil spring P1 winding position P2 removal position

Claims (3)

A winding device for winding and winding a belt-like positive and negative electrode sheet coated with an active material and a belt-like separator made of an insulating material,
A turret provided so as to be rotatable about its central axis as a rotation axis;
A plurality of winding cores that are arranged at predetermined intervals in the rotation direction of the turret, and each of which can be wound around the electrode sheet and the separator by rotating around its own central axis,
After winding the electrode sheet and the separator continuously supplied from a predetermined supply mechanism for a predetermined length with respect to the first core in the first position among the plurality of cores, the turret is rotated, and the first winding Turret control means for moving the core to the second position and moving the second core different from the first core to the first position;
Sheet cutting means for cutting the terminal portion of the electrode sheet wound around the first core at least before the first core moves to the second position;
Fixing means for fixing the separator to the second core moved to the first position;
A pair of gripping means capable of gripping the separator connected between the first core located in the second position and the second core located in the first position;
Separator cutting means capable of cutting the separator between a position held by the holding means and a position fixed to the second core;
After winding the separator, when the unwinding portion of the separator is wound up by the first core located at the second position, the gripping means that grips the unwinding portion is directed toward the first core. Guide means for enabling movement;
Tension applying means for applying a predetermined tension to the unwinding portion of the separator in a direction opposite to the winding direction when the gripping means moves toward the first winding core. Winding device.   2. The winding device according to claim 1, wherein two winding cores of the first winding core and the second winding core are provided at intervals of 180 ° in the rotation direction of the turret. The pair of gripping means includes a turret side gripping means disposed on the turret, and a movable gripping means provided so as to be movable forward and backward with respect to the turret side gripping means.
The winding device according to claim 1 or 2, wherein the turret is provided with a plurality of turret side gripping means corresponding to the plurality of winding cores.

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