JP4912351B2 - Winding device - Google Patents

Description

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

  For example, a battery element used as a secondary battery such as a lithium ion battery is configured by winding a belt-like body composed of a plus electrode foil, a minus electrode foil, and two separators.

  Conventionally, as a winding device for winding a belt-like body, the electrode foil and the separator are wound around a rotatable core (rotating shaft), and the belt-like body wound after winding (winding body) There is known a method of detaching from the rotating shaft. In addition, in order to avoid the hindrance to removal of the wound body due to the winding pressure of the wound body, a cylindrical core core is attached to the rotating shaft, and the belt-like body is wound around the core core. In addition, after winding the belt-like body, a technique has been proposed in which the winding element is removed together with the core, that is, a winding element composed of the core and the belt-like body is used as a battery element.

  Regardless of which method is adopted, the belt is supplied from the roll wound in a roll, and when the belt is supplied, the belt is rotated while holding the tip of the belt. It is necessary to guide towards the axis. Therefore, the winding device is generally provided with a supply means for supplying each electrode foil and each separator toward the rotating shaft.

By the way, when winding up the positive electrode foil or the negative electrode foil, there is a concern that each electrode foil may meander. If the electrode foil is wound in a meandering manner as described above, the quality may be deteriorated. Therefore, there is a technique for providing means for correcting the meandering of the electrode foil (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2003-297412

  From the viewpoint of realizing efficient meandering correction, the meandering correcting means is preferably provided at a position close to the rotation axis. However, as described above, in the middle of the path of the electrode foil, since the supply means movable to supply the electrode foil toward the rotating shaft is provided, the supply means is to avoid interference with the supply means. The actual condition is that meandering correction means must be provided upstream of the position. That is, conventionally, the meandering correction means has to be provided at a position further away from the retracting position of the supply means.

  The present invention has been made in view of the above circumstances, and the object thereof is to realize quick and efficient meandering correction, and as a result, the deterioration of the quality of the winding element can be more reliably suppressed. It is to provide a winding device.

  In the following, each means suitable for solving the above-described object will be described in terms of items. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. A rotating means configured to be rotatable around an axis and capable of winding at least a strip-shaped electrode foil based on its own rotation;
A support means for supporting the raw material of the electrode foil wound in a roll shape;
In addition to having a gripping part capable of gripping the electrode foil, when starting to wind the electrode foil, the rotating means is moved by its own movement while the gripping part grips the electrode foil extending from the support means. An electrode foil supply means capable of supplying to a winding device,
Providing a meandering correction means for correcting the meandering of the electrode foil;
The meander correction means is configured to move with the movement of the electrode foil supply means ,
The meandering correction means, a detection unit for detecting a displacement in the width direction of the electrode foil,
A winding device comprising: a correction unit that eliminates a positional shift in the width direction of the electrode foil based on a detection result of the detection unit.

  According to said means 1, it is comprised so that it can rotate centering on an axis line, and at least strip | belt-shaped electrode foil is wound based on rotation of a rotation means. In addition, the raw material of the electrode foil wound in a roll shape is supported by the support means, and when starting to wind the electrode foil, the electrode foil extending from the support means is gripped by the gripping portion of the electrode foil supply means Then, it is supplied to the rotating means by the movement of the electrode foil supply means.

Now, in the means 1, the meandering of the electrode foil is corrected by the meandering correcting means, and the meandering correcting means is configured to move with the movement of the electrode foil supply means. For this reason, meandering correction can be realized at a position close to the rotating means as compared with the prior art in which the meandering correcting means must be provided at a position separated from the electrode foil supply means. Therefore, prompt and efficient meandering correction can be realized, and as a result, deterioration of the quality of the winding element can be more reliably suppressed. On the other hand, since the meandering correction means moves along with the movement of the electrode foil supply means, the meandering correction means does not become an obstacle to the movement of the electrode foil supply means. Therefore, there is no problem in supplying the electrode foil.
Further, if the meandering correction means includes a detection unit that detects a positional deviation in the width direction of the electrode foil, and a correction unit that eliminates a positional deviation in the width direction of the electrode foil based on the detection result of the detection unit, More accurate meandering correction can be realized.

Mean 2. A rotating means configured to be rotatable around an axis and capable of winding at least a strip-shaped electrode foil based on its own rotation;
A support means for supporting the raw material of the electrode foil wound in a roll shape;
In addition to having a gripping part capable of gripping the electrode foil, when starting to wind the electrode foil, the rotating means is moved by its own movement while the gripping part grips the electrode foil extending from the support means. An electrode foil supply means capable of supplying to a winding device,
The electrode foil supply means is provided with meander correction means for correcting the meander of the electrode foil ,
The meandering correction means, a detection unit for detecting a displacement in the width direction of the electrode foil,
A winding device comprising: a correction unit that eliminates a positional shift in the width direction of the electrode foil based on a detection result of the detection unit.

  According to the means 2, basically the same operational effects as the means 1 can be obtained. Particularly, in the means 2, since the electrode foil supply means is provided with meander correction means for correcting the meandering of the electrode foil, a single drive source for moving both the electrode foil supply means and the meander correction means is provided. It is possible to achieve unification, and it is possible to achieve compactness and space saving as compared with the case where each is provided separately.

  Means 3. The winding device according to claim 2, wherein the meandering correction means is provided upstream of the gripping portion.

  According to the means 3, the meandering correcting means is provided on the upstream side of the grip portion, that is, on the support means side. Therefore, the grip portion can be positioned as much as possible on the rotating means side, and the smooth winding start of the electrode foil can be realized.

  Means 4. Any of means 1 to 3, wherein the electrode foil supply means is configured to be movable between a retracted position separated from the rotating means and a closest approach position closest to the rotating means. The winding device described in 1.

  According to the means 4, the electrode foil supply means can move between the retracted position separated from the rotating means and the closest approach position closest to the rotating means. Accordingly, during winding, the meandering correction can be performed on the rotating means side from the retracted position, that is, at a position closer to the rotating means than in the past.

  Means 5. At the start of winding of the electrode foil, the electrode foil supply means is moved to the closest position, and the closest position causes the tip of the electrode foil gripped by the gripping portion to rotate the rotating means. The winding device according to claim 4, wherein the winding device is a position where winding can be started.

  If the closest position is set to a position where the tip of the electrode foil gripped by the gripper can start winding as in the above-described means 5, winding of the electrode foil can be realized more reliably. Further, if winding is performed after the meandering correcting means (electrode foil supply means) is positioned at or near the closest position, the electrode foil is meandering corrected near the rotating means during winding. Thus, more efficient meandering correction can be realized.

  Means 6. The winding according to means 4 or 5, wherein, after winding of the electrode foil, during winding, the electrode foil supply means is positioned closer to the rotating means than the retracted position. Taking device.

  According to the means 6, since the electrode foil supply means is located closer to the rotating means than the retracted position during winding after the start of winding of the electrode foil, it rotates more reliably than in the past. Serpentine correction is performed on the side closer to the means. As a result, a more efficient meandering means can be realized.

  Mean 7 The winding according to means 6, wherein the electrode foil supply means is configured to be positioned on a side farther from the rotating means than the closest position during winding after the start of winding of the electrode foil. Taking device.

  According to the means 7, in addition to the effect of the means 6, the electrode foil supply means is positioned on the side farther from the rotating means than the closest position during winding after the start of winding of the electrode foil. To do. For this reason, it is possible to avoid problems caused by winding the electrode foil while the electrode foil supply means continues to be located at the closest position, for example, a situation where the wound body hits the electrode foil supply means.

  Means 8. The winding apparatus according to claim 6 or 7, wherein the electrode foil supply means is configured to gradually move away from the rotating means as the winding amount increases after starting the winding of the electrode foil.

  According to the above-mentioned means 8, it is possible to avoid problems caused by winding the electrode foil while the electrode foil supply means continues to be located at the closest position, for example, a situation where the wound body hits the electrode foil supply means. be able to. On the other hand, since the electrode foil supply means is gradually separated from the rotation means, more efficient meandering correction can be performed as compared with the case where the electrode foil supply means is separated at a stretch.

Means 9 . The electrode foil comprises a plus electrode foil and a minus electrode foil,
The positive electrode foil and the negative electrode foil are each configured to be wound in an insulated state through a strip-shaped separator made of an electrically insulating material,
The winding device according to any one of means 1 to 9, wherein the support means and the electrode foil supply means are provided corresponding to the plus electrode foil and the minus electrode foil, respectively.

As in the means 9 , a positive electrode foil and a negative electrode foil are used as electrode foils, and the positive electrode foil and the negative electrode foil are wound up in an insulated state through a strip-shaped separator made of an electrically insulating material. You may comprise. In this case, it is desirable that the support means and the electrode foil supply means described above are provided corresponding to the plus electrode foil and the minus electrode foil, respectively.

  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 device of this embodiment will be described. As shown in FIG. 1, a lithium ion battery element (hereinafter referred to as “battery element”) 1 has two separators 3, 4, a plus electrode foil 5, and a minus electrode with respect to a cylindrical core 2. A belt-like body 7 constituted by the foil 6 is wound. In FIG. 1, for convenience of explanation, there are places where the separators 3 and 4, the plus electrode foil 5, and the minus electrode foil 6 are spaced apart from each other.

  In the present embodiment, the core core 2 is formed of a material having sufficient rigidity (for example, a metal material such as aluminum or a resin material such as polypropylene (PP)). Moreover, the said core core 2 has the penetration hole 8 of cross-sectional non-circular shape (this embodiment square cross-section) (refer FIG. 3 etc.).

  The separators 3 and 4 have the same width as the length along the longitudinal direction of the core 2 and are insulated to prevent different electrode foils 5 and 6 from contacting each other and causing a short circuit. The body, in particular in the present embodiment, is composed of PP.

  The plus electrode foil 5 and the minus electrode foil 6 also have substantially the same width as the length along the longitudinal direction of the core 2, like the separators 3 and 4. In this embodiment, the plus electrode foil 5 and the minus electrode foil 6 are made of a thin metal plate, and an active material (not shown) is applied to both the front and back surfaces. And the ion exchange between the plus electrode foil 5 and the minus electrode foil 6 can be performed through the active material. More specifically, during charging, ions move from the positive electrode foil 5 side to the negative electrode foil 6 side, and conversely, during discharging, ions move from the negative electrode foil 6 side to the positive electrode foil 5 side. A plurality of positive leads (not shown) extend from one edge in the width direction of the plus electrode foil 5, and a plurality of negative leads (not shown) extend from the other edge in the width direction of the minus electrode foil 6.

  In obtaining a lithium ion battery, the battery element 1 is placed in a cylindrical battery container (not shown) made of metal, 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), the negative electrode lead is also connected to a negative terminal component (not shown), and both terminal components are opened at both ends of the electric container. By providing in, a lithium ion battery can be obtained.

  Next, the winding device 11 for manufacturing the battery element 1 will be described. As shown in FIG. 2, the winding device 11 includes a turret 12 that is rotatably provided. The turret 12 is configured such that two disk-shaped tables 14 and 15 face each other, and the rotation means 20 is symmetric about the centers of the tables 14 and 15 across the tables 14 and 15. Two centers are provided. Both tables 14 and 15 (turret 12) are configured to rotate clockwise and are set so that both tables 14 and 15 rotate synchronously. Thereby, each rotation means 20 can move between the attachment / detachment position P1 and the winding position P2. Note that the tables 14 and 15 may be reversible by 180 °.

  An example of the rotating unit 20 will be described with reference to FIG. 3. The rotating unit 20 extends in the direction of the axis C, and the core as a rotating shaft that protrudes from the table 14 on one end side in the axis C direction toward the table 15 on the other end side. 21 and a core receiver 31 that extends in the direction of the axis C and protrudes from the table 15 on the other end side in the axis C direction toward the table 14 on the one end side.

  The winding core 21 has a rod shape as a whole, and includes a base portion 22 extending to the other end side in the axis C direction, a mounting portion 23 extending from the base portion 22 to the other end side in the axis C direction, and the base portion 22 and the mounting portion 23. It comprises a taper stepped portion 24 formed therebetween. Further, the central axes of the base portion 22, the mounting portion 23, and the taper step portion 24 coincide with the axis C.

  The base portion 22 has a cylindrical shape and is configured to be movable relative to the table 14 along the direction of the axis C (can be moved in and out) by a driving unit (not shown). Thereby, the core 21 can be brought into contact with and separated from the core receiver 31. In addition, the base 22 can be rotated relative to the table 14 with the axis C as the rotation axis by a rotation driving means (for example, a motor) (not shown), and the entire core 21 has the axis C as the rotation axis. Relative rotation is possible. That is, the rotation driving means functions as winding power when winding the belt-like body 7.

  The mounting portion 23 is for mounting the core 2 on the outer peripheral portion when the battery element 1 is manufactured. The mounting portion 23 has a bar shape and is formed in a non-circular cross section (in this embodiment, a square cross section) to correspond to the cross sectional shape of the insertion hole 8 of the core core 2. Further, the mounting portion 23 is made thinner than the base portion 22, and a pair of tip crack portions 25 extending in the direction of the axis C are formed on the tip side surface portion of the mounting portion 23. In addition, a fitting recess (not shown) capable of fitting a later-described receiving pin 33 is formed in the inner peripheral portion of the tip crack portion 25.

  On the other hand, the core receiver 31 has a columnar support portion 32, a receiving pin 33 that is integrally formed with the support portion 32 and protrudes toward one end side in the axis C direction, and an outer peripheral side of the receiving pin 33. And a tip-shaped cylindrical receiving portion 34. The central axes of the support portion 32, the receiving pin 33, and the receiving portion 34 are coincident with the axis C.

  The support portion 32 is supported relative to the table 15 so as to be capable of relative rotation (free rotation in the present embodiment) about the axis C as a rotation axis, and relatively unmovable in the direction of the axis C.

  The receiving pin 33 has a cylindrical shape and is configured so that most of the outer peripheral surface thereof is substantially parallel to the axis C. The receiving pin 33 is disposed on the inner side of the receiving portion 34, and has an outer diameter that is the same as or slightly larger than the inner diameter of the fitting recess. The receiving pin 33 has a tapered tip at its tip so that the fitting into the fitting recess is easier.

  The receiving portion 34 has an outer diameter that is substantially equal to the outer diameter of the core core 2, and a tip surface thereof serves as a contact surface 35 that can abut one end surface of the core core 2. Yes. An annular space between the receiving portion 34 and the receiving pin 33 is an accommodating recess 36 that can accommodate the tip of the mounting portion 23, and the receiving pin 33 is fitted in the fitting recess. In this case, the tip of the mounting portion 23 is accommodated in the accommodation recess 36.

  In the rotating means 20 configured as described above, the core core 2 is attached to the mounting portion 23 by the attaching / detaching device 13 described later. Then, by moving the base portion 22 relative to the other end side (table 15 side) along the axis C direction, the receiving pin 33 is fitted into the fitting concave portion, and the receiving concave portion 36 of the receiving portion 34 is fitted into the receiving concave portion 36. On the other hand, the tip of the mounting portion 23 is inserted. At this time, the front end portion of the mounting portion 23 is expanded to the outer peripheral side by the receiving pin 33, and the other end portion of the winding core 2 is held by the mounting portion 23 from the inner peripheral side. At the same time, one end of the core 2 is brought into contact with and held by the tapered stepped portion 24. Furthermore, the contact surface at the other end of the core 2 contacts the contact surface 35 of the receiving portion 34. In this way, the core core 2 is attached to the rotating means 20.

  The description returns to the winding device 11 of FIG. As described above, the two rotating means 20 can be moved between the attachment / detachment position P1 (right position in the figure) and the winding position P2 (left position in the figure) by the rotation of the turret 12. However, in the present embodiment, an attachment / detachment device 13 for attaching a core core 2 (to be described later) and removing the battery element 1 is provided corresponding to the attachment / detachment position P1.

  The winding position P2 is a position for winding the belt-like body 7 around the core core 2, and a belt-like body supply mechanism for supplying the belt-like body 7 corresponding to the winding position P2. Is provided. More specifically, the belt-like body supply mechanism includes a separator supply mechanism that supplies the two separators 3 and 4 to the rotating means 20 positioned at the winding position P2, and a plus electrode foil 5 that is connected to the rotating means 20 of the rotating means 20. And a negative electrode foil supply mechanism for supplying the negative electrode foil 6 toward the rotating means 20 (both are not shown in FIG. 2). Any of the supply mechanisms is configured such that the belt-like body 7 (separators 3 and 4 and electrode foils 5 and 6) can be drawn out from the roll wound in a roll shape and supplied to the rotating means 20. However, here, there is a feature in the configuration of the plus electrode foil supply mechanism, the minus electrode foil supply mechanism, and the like. Next, the plus electrode foil supply mechanism will be described as a representative example with reference to FIG. I decided to.

  On the most upstream side of the plus electrode foil supply mechanism, an original fabric 40 on which the plus electrode foil 5 is wound in a roll shape is supported by a support means 41 so as to be freely rotatable. A tension applying means 42 is provided in the middle of the supply path of the positive electrode foil 5 from the support means 41 to the rotating means 20. The tension applying means 42 includes a pair of rollers 43 and 44 and a step roller 45 provided between the rollers 43 and 44.

  In the middle of the supply path of the positive electrode foil 5, an electrode foil supply unit 47 is provided on the downstream side (rotation unit 20 side) of the tension applying unit 42. The electrode foil supply means 47 includes a pair of upper and lower chucks 48 as gripping portions. The electrode foil supply means 47 includes a chuck actuator (for example, a motor or a cylinder) (not shown), so that the chuck 48 can be opened and closed.

  The electrode foil supply means 47 is also configured to be movable along the supply path of the positive electrode foil 5. More specifically, the electrode foil supply means 47 is moved by a not-shown actuator (for example, a motor) to a retracted position (see FIG. 4) separated from the rotating means 20 by a considerable distance and a closest position (see FIG. 4) closest to the rotating means 20. 6)). The closest approach position is a position that is close enough to start winding the tip portion of the plus electrode foil 5 held by the chuck 48 based on the rotation of the rotating means 20.

  In the present embodiment, the electrode foil supply unit 47 includes a meandering correction unit 51 in addition to the grip portion 48. The meandering correction means 51 is arranged at the upper and lower positions of the plus electrode foil 5, the edge sensor 52 as a detection unit for detecting the positional deviation of the plus electrode foil 5 in the width direction, and the plus electrode based on the detection result of the edge sensor 52. The correction part 53 which eliminates the position shift of the width direction of the foil 5 and the actuator (not shown) which operate | moves the said correction part 53 are provided. In the present embodiment, as shown in FIG. 5, the correcting portion 53 is composed of a pair of upper and lower rollers 54 and 55, and the lower center of the lower roller 54 is pivoted (pivot center) by the actuator. As shown in FIG. Thereby, the positional deviation (meandering) of the plus electrode foil 5 is corrected.

  Further, a cutting means 61 for cutting the positive electrode foil 5 is provided on the downstream side (rotating means 20 side) of the electrode foil supply means 47 in the middle of the supply path of the positive electrode foil 5. The cutting means 61 includes, for example, a pedestal portion 62 located on the lower side of the plus electrode foil 5 and a blade portion 63 located on the upper side. However, the cutting means 61 is provided at a position that does not hinder the movement of the electrode foil supply means 47, or is movable between a cutting position and a retreat position that does not hinder the movement of the electrode foil supply means 47. Is provided.

  The above is the description of the plus electrode foil supply mechanism, but the minus electrode foil supply mechanism for supplying the minus electrode foil 6 toward the rotating means 20 has the same configuration as described above. Also, the separator supply mechanism basically has the same configuration as described above. In the present embodiment, separator fixing means (not shown) is provided corresponding to the winding position P2. The separator fixing means is configured to be able to attach the tip portions of the separators 3 and 4 to the surface of the core core 2 by, for example, heat welding in the initial stage of winding. Of course, a configuration in which the tip portions of the separators 3 and 4 are simply attached to the surface of the core core 2 using an adhesive tape or the like may be used.

  Next, a method for manufacturing the battery element 1 using the winding device 11 described above will be described with particular attention paid to the supply of electrode foil (plus electrode foil 5 in FIGS. 6 to 10 and the like).

  First, by rotating the turret 12 half-clockwise, one rotating means 20 is moved to the attachment / detachment position P1. At this time, the other rotating means 20 is positioned at the winding position P2. For example, the rotating means 20 that has been positioned at the winding position P2 until the winding of the belt-like body 7 is almost completed is moved to the attachment / detachment position P1. On the other hand, the rotating means 20 that has been located at the attachment / detachment position P1 and on which the new core core 2 is mounted is moved to the winding position P2.

  In the rotating means 20 located at the winding position P2, the core core 2 is mounted, but nothing is wound around the core core 2 at the beginning. In this state, first, the tip end portions of the separators 3 and 4 are attached and fixed to the surface of the core core 2 by the separator fixing means described above.

  Subsequently, at the winding position P2, the rotating means 20 (winding core 21) is rotated. When the predetermined timing arrives, the electrode foil supply means 47 of the plus electrode foil supply mechanism and the minus electrode foil supply mechanism are operated, and the electrode foils 5 and 6 are supplied toward the core core 2. Is done.

  More specifically, each of the electrode foils 5 and 6 whose tip portions have been gripped by the chuck 48 until then are moved by the electrode foil supply means 47 (chuck 48) toward the rotation means 20 as shown in FIG. By being done, it supplies toward the core core 2. As a result, as shown in FIG. 7, the tips of the electrode foils 5 and 6 are sandwiched between the separators 3 and 4, and the plus electrode foil 5 and the minus electrode foil 6 are inserted through the separators 3 and 4, respectively. As a result, they are wound up in an insulated state. When the winding of the plus electrode foil 5 and the minus electrode foil 6 is started, the chuck 48 is opened as shown in FIG. Thus, the plus electrode foil 5 and the minus electrode foil 6 are wound together with the separators 3 and 4 while being given a predetermined tension by the tension applying means 42. As the chuck 48 is opened, the electrode foil supply means 47 is moved somewhat upstream (side away from the rotation means 20), as shown in FIG. As a result, even when the winding amount increases, a situation in which the winding element comes into contact with the chuck 28 and the like and the winding is hindered is avoided. Of course, you may comprise so that it may move to an upstream side gradually with the increase in winding amount. However, during the winding, the electrode foil supply means 47 is arranged so as to be positioned closer to the rotation means 20 than the retracted position.

  When the winding of the belt-like body 7 is almost completed, the rotation of the rotating means 20 is once stopped, and then the plus electrode foil 5 and the minus electrode foil 6 are cut by the cutting means 61 as shown in FIG. The At the time of the cutting, the chuck 48 is closed, whereby the tip portions of the plus electrode foil 5 and the minus electrode foil 6 for next winding are gripped by the chuck 48. Thereafter, after rotating the rotating means 20 somewhat, the separators 3 and 4 are also cut. Then, the remaining cut strip 7 is completely wound up, and the winding is completed when the outer peripheral separators 3 and 4 are taped.

  Thereafter, after the rotating means 20 and the like are moved to the attachment / detachment position P1, the core 21 is relatively moved in a direction away from the core receiver 31, and the receiving pin 33 is removed from the fitting recess. Thus, the holding force of the core 2 by the mounting portion 23 is released. After that, the battery element 1 is obtained by removing the wound core core 2 around which the belt-like body 7 is wound together with the wound core 2 from the mounting portion 23.

  As described in detail above, according to the present embodiment, the meandering of the plus electrode foil 5 and the minus electrode foil 6 is corrected by the meander correcting means 51, and the meander correcting means 51 is the electrode foil supplying means 47. It moves with the movement of the said electrode foil supply means 47. For this reason, meandering correction can be realized at a position closer to the rotating means 20 as compared with the prior art in which the meandering correcting means has to be provided at a position separated from the electrode foil supply means. Therefore, quick and efficient meandering correction can be realized, and deterioration of the quality of the battery element 1 can be more reliably suppressed. On the other hand, the meandering correction means 51 moves in the longitudinal direction of the positive electrode foil 5 and the negative electrode foil 6 as the electrode foil supply means 47 moves. It will never be. Accordingly, there is no problem in supplying the electrode foils 5 and 6.

  Furthermore, the drive source for moving both the electrode foil supply means 47 and the meandering correction means 51 can be unified, and more compact than in the case where each is provided separately. , Space can be saved.

  Further, since the meandering correction means 51 is provided on the upstream side of the chuck 48, the chuck 48 can be positioned as close to the rotating means 20 as possible. Therefore, smooth winding start of each electrode foil 5 and 6 is realizable.

  Furthermore, the electrode foil supply means 47 can move between a retracted position separated from the rotating means 20 and a closest approach position closest to the rotating means. Accordingly, during winding, the meandering correction can be performed on the rotating means 20 side from the retracted position, that is, at a position closer to the rotating means 20 than in the past. In particular, if winding is performed after the meandering correction means 51 (electrode foil supply means 47) is positioned in the vicinity of the closest approach position, each of the electrode foils 5 and 6 is rotated by the rotating means 20 during winding. The meandering is corrected in the vicinity. As a result, the above-described effect of being able to realize quick and efficient meandering correction is more reliably achieved.

  On the other hand, after the start of winding of the electrode foils 5 and 6, during winding, the electrode foil supply means 47 is disposed on a side somewhat away from the rotating means 20 from the closest position. For this reason, a problem caused by winding of the electrode foils 5 and 6 while the electrode foil supply means 47 continues to be positioned at the closest position, for example, a situation in which a winding element hits the electrode foil supply means 47 is avoided. can do.

  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 said embodiment, although the battery element 1 is materialized about the case where the core core 2 is comprised, as a case where the type of battery element which does not have the said core core 2 is obtained is materialized. Also good.

  (B) The rotating means 20 in the above embodiment is merely an example, and it goes without saying that other configurations may be adopted. For example, in the above example, the receiving pin 33 is formed integrally with the support portion 32, but the receiving pin 33 is provided separately from the support portion 32, and the receiving pin 33 is arranged in the axis C direction with respect to the support portion 32. It is good also as comprising (moving and appearing) along. In consideration of the above (a), a winding core having a slit through which the separators 3 and 4 are inserted may constitute a rotating means.

  (C) In the above embodiment, the battery element 1 of the lithium ion battery is manufactured by the winding device 11, but the winding element manufactured by the winding device 11 is not limited to this, for example, Alternatively, a winding element of an electrolytic capacitor or the like may be manufactured.

  (D) In the above embodiment, the meandering correcting means 51 is provided with the correcting portion 53 including the pair of upper and lower rollers 54, 55, but other configurations may be used. For example, it may be composed of one or a plurality of rollers movable in the left-right direction (width direction).

  (E) In the above embodiment, the electrode foil supply means 47 is provided with the meander correction means 51, but the meander correction means 51 may be configured to move as the electrode foil supply means 47 moves. For example, the meandering correction means 51 may not necessarily be provided for the electrode foil supply means 47. For example, the electrode foil supply means 47 and the meandering correction means 51 may be provided separately and in a movable manner. Moreover, the electrode foil supply means 47 and the meandering correction means 51 may be provided on one movable plate or the like.

It is a cross-sectional schematic diagram for showing the structure of the battery element in one Embodiment. It is a front schematic diagram which shows a winding apparatus. It is a perspective view which shows a rotation means etc. It is a schematic diagram which shows schematic structure of the (plus) electrode foil supply mechanism. It is a side view which shows a correction part. It is a principal part schematic diagram explaining the procedure at the time of supply of (plus) electrode foil. It is a principal part schematic diagram explaining the procedure at the time of supply of (plus) electrode foil. It is a principal part schematic diagram explaining winding-up processes, such as electrode foil. It is a principal part schematic diagram explaining winding-up processes, such as electrode foil. It is a principal part schematic diagram explaining the cutting process of electrode foil etc. FIG.

DESCRIPTION OF SYMBOLS 1 ... Battery element as a winding element, 3, 4 ... Separator, 5 ... Positive electrode foil, 6 ... Negative electrode foil, 7 ... Strip | belt body, 11 ... Winding apparatus, 20 ... Rotating means, 40 ... Original fabric, 41 DESCRIPTION OF SYMBOLS ... Support means, 42 ... Tension applying means, 47 ... Electrode foil supply means, 48 ... Chuck as gripping part, 51 ... Meander correction means, 52 ... Edge sensor as detection part, 53 ... Correction part, 54, 55 ... Roller .

Claims (9)

A rotating means configured to be rotatable around an axis and capable of winding at least a strip-shaped electrode foil based on its own rotation;
A support means for supporting the raw material of the electrode foil wound in a roll shape;
In addition to having a gripping part capable of gripping the electrode foil, when starting to wind the electrode foil, the rotating means is moved by its own movement while the gripping part grips the electrode foil extending from the support means. An electrode foil supply means capable of supplying to a winding device,
Providing a meandering correction means for correcting the meandering of the electrode foil;
The meander correction means is configured to move with the movement of the electrode foil supply means ,
The meandering correction means, a detection unit for detecting a displacement in the width direction of the electrode foil,
A winding device comprising: a correction unit that eliminates a positional shift in the width direction of the electrode foil based on a detection result of the detection unit. A rotating means configured to be rotatable around an axis and capable of winding at least a strip-shaped electrode foil based on its own rotation;
A support means for supporting the raw material of the electrode foil wound in a roll shape;
In addition to having a gripping part capable of gripping the electrode foil, when starting to wind the electrode foil, the rotating means is moved by its own movement while the gripping part grips the electrode foil extending from the support means. An electrode foil supply means capable of supplying to a winding device,
The electrode foil supply means is provided with meander correction means for correcting the meander of the electrode foil ,
The meandering correction means, a detection unit for detecting a displacement in the width direction of the electrode foil,
A winding device comprising: a correction unit that eliminates a positional shift in the width direction of the electrode foil based on a detection result of the detection unit.   The winding device according to claim 2, wherein the meandering correction means is provided on the upstream side of the grip portion.   4. The electrode foil supply means is configured to be movable between a retracted position separated from the rotating means and a closest approach position closest to the rotating means. A winding device according to any one of the above. At the start of winding the electrode foil, the electrode foil supply means is moved to the closest position,
5. The winding device according to claim 4, wherein the closest approach position is a position at which a leading end portion of the electrode foil gripped by the gripping portion can be started based on rotation of the rotating means. .   The winding of the electrode foil is started, and during winding, the electrode foil supply means is configured to be positioned closer to the rotating means than the retracted position. Winding device.   The winding of the electrode foil is started, and the winding of the electrode foil is configured so that the electrode foil supply means is positioned on a side farther from the rotating means than the closest approach position. Winding device.   The winding device according to claim 6 or 7, wherein the electrode foil supply means is configured to gradually move away from the rotating means as the winding amount increases after the electrode foil winding is started. The electrode foil comprises a plus electrode foil and a minus electrode foil,
The positive electrode foil and the negative electrode foil are each configured to be wound in an insulated state through a strip-shaped separator made of an electrically insulating material,
The winding device according to any one of claims 1 to 8 , wherein the support means and the electrode foil supply means are provided corresponding to the plus electrode foil and the minus electrode foil, respectively.

Images