JP6593677B2 - Winding machine and electrode body manufacturing method - Google Patents

Description

  The present invention relates to a winding machine for winding an electrode and a separator, and an electrode body manufacturing method using the winding machine.

  Conventionally, a battery winding machine for winding a positive electrode current collector and a negative electrode current collector via first and second separators is known (see Patent Document 1). As shown in FIG. 10, the battery winding machine includes a winding unit 101, a negative electrode transfer unit 110 for supplying the negative electrode sheet 102 to the winding unit 101, and a positive electrode for supplying the positive electrode sheet 103 to the winding unit 101. It includes a transfer means 120 and first and second separator transfer means 130 and 140 for supplying the first and second separators 104 and 105 to the entraining unit 101.

  The negative electrode transfer unit 110 includes a plurality of conveyance rollers 111 and a cutter 112 disposed in the vicinity of the winding unit 101. The positive electrode transfer unit 120 includes a plurality of transport rollers 121 and a cutter 122 disposed in the vicinity of the winding unit 101. The first and second separator transfer means 130 and 140 include a plurality of transport rollers 131 and 141 and a cutter 132 disposed in the vicinity of the winding unit 101.

  In the battery winding machine 100, the winding unit 101 winds the negative electrode sheet 102 and the positive electrode sheet 103 through the first and second separators 104 and 105, and the negative electrode sheet 102 and the positive electrode sheet having a predetermined length in the winding unit 101. 103 and the first and second separators 104 and 105 are wound, the negative electrode sheet 102, the positive electrode sheet 103, and the first and second separators 104 and 105 are cut by the cutters 112, 122, and 132, and the end stops The electrode group is completed by end-stopping with a tape.

  However, since the leading ends of the negative electrode sheet 102, the positive electrode sheet 103, and the first and second separators 104 and 105 after being cut by the cutters 112, 122, and 132 are free ends, the conveying rollers 111, 121 , 131, 141, and the like is bent when supplied to the entrainment unit 101, or the negative electrode sheet 102, the positive electrode sheet 103, the first and second separators 104, 105 are originally bent. In such a state, it remains in a bent state. When the sheet is supplied to the entrainment unit 101 in a state where bending or the like has occurred in this way, at least one of the negative electrode sheet 102, the positive electrode sheet 103, and the first and second separators 104 and 105 is displaced due to the bending or the like. May occur. When such a positional deviation occurs, a winding deviation occurs in the electrode group formed by the winding portion 101 (which is wound).

JP-A-9-180735

  Therefore, the present invention uses a winding machine that is less likely to be misaligned in the superimposed electrode or separator when an electrode or separator having a free end is supplied to the junction, and uses this winding machine. It is an object of the present invention to provide a method for manufacturing an electrode body.

The winding machine according to the present invention is
A winding part for winding the electrode and the separator in a stacked state;
In the transport path of the electrode and the separator to the winding part, the electrodes, the separators, or a joining part where the electrodes and the separator are overlapped,
A delivery part that feeds the electrode or the separator whose tip is a free end toward the joining part;
A posture correcting unit that is disposed between the merging unit and the sending unit and that corrects the posture of the electrode or the separator fed from the sending unit.

  According to such a configuration, the posture of the electrode or separator that is fed toward the joining portion and the tip is a free end is corrected by the posture correcting portion (that is, bending caused by being pushed out from the feeding portion, or Therefore, the displacement or the like caused by the bending or the like between the strip-like members (electrodes or separators) overlapped at the joining portion can be prevented.

In the winding machine,
The posture correction unit has a reference surface that extends from the sending unit toward the joining unit and faces the electrode or the separator from the sending unit toward the joining unit, and the electrode or the electrode fed from the sending unit The separator may be along the reference plane.

  According to such a configuration, the posture of the electrode or separator that is fed toward the joining portion and has a free end at the tip can be suitably corrected with a simple configuration such as a reference surface.

In this case, for example,
The posture correction unit includes an intake portion that sucks air in the direction from the electrode or the separator toward the reference surface on the reference surface, and the reference surface so that the electrode or the separator can pass between the intake surface and the reference surface. And at least one of an air supply unit that supplies air toward the reference surface from a position facing each other with a gap therebetween.

  According to such a configuration, the electrode or the separator whose tip is a free end can be along the reference plane by at least one of the intake air and the air supply. Therefore, when the electrode or the separator is along the reference plane, Contact resistance can be suppressed. As a result, it is possible to suppress the deflection or the like due to the contact resistance in the electrode or the separator, and as a result, the positional deviation due to the deflection or the like between the strip-shaped members (electrodes or separators) overlapped at the junction. Can be more effectively prevented.

In the winding machine,
The posture correction unit is
A first air intake portion that is the air intake portion for intake air at the reference plane;
A second air intake portion that inhales in a direction away from the reference surface at a position facing the reference surface so as to allow the electrode or the separator to pass between the reference surface and the reference surface;
You may have.

According to such a configuration, the first suction unit for sucking by the second air suction section by (i.e., the electrode or separator is conveyed to suck from both sides) that, placed along the electrode (or separator) to the reference plane It is easy to reduce the frictional resistance between the electrode (or the separator) and the reference surface at the time. Thereby, the bending of the electrode (or separator) due to the frictional resistance can also be prevented, and as a result, the positional deviation of the electrode (or separator) can be prevented more effectively and reliably.

In addition, the winding machine
A cutting part for cutting the electrode to form the tip;
The delivery section delivers the electrode;
The posture correction unit may include an intake unit that intakes air in the direction from the electrode toward the reference surface on the reference surface.

  According to such a configuration, since the electrode or separator whose tip is a free end can be along the reference plane by intake air, the contact resistance when the electrode or the separator is along the reference plane is suppressed. In addition, it is possible to prevent the electrode or the separator from being bent due to the contact resistance, and when the electrode or the separator originally has a bend, the bend can be corrected. As a result, it is possible to more effectively prevent positional deviation caused by the bending or the like between the band-shaped members (electrodes, separators) overlapped at the junction.

  In addition, since the metal (for example, metal chips) generated when the electrode is cut at the cutting portion is sucked and removed together with the air by the suction portion, the metal is mixed into the formed electrode body. Can be prevented.

In addition, the method for manufacturing the electrode body according to the present invention includes:
Winding in a state where the electrode and the separator are laminated by any one of the above winding machines.

  According to such a configuration, when the electrode and the separator are wound in the winding machine, the band-shaped members (electrodes, separators) overlapped at the merging portion of the winding machine are pushed (extruded from the feeding portion). Positional misalignment due to the deflection caused by this, or the deflection inherent in the electrode or separator) is prevented, thereby obtaining an electrode body with less (suppressed) winding misalignment.

  As described above, according to the present invention, when an electrode or separator whose front end is a free end is supplied to the joining portion, a winding machine that is unlikely to be misaligned in the superimposed electrode or separator, and this winding The manufacturing method of the electrode body using a machine can be provided.

FIG. 1 is a schematic configuration diagram of a winding machine according to the present embodiment. FIG. 2 is a schematic configuration diagram of a negative electrode cutting portion of the winding machine. FIG. 3 is a plan view of the negative electrode cutting part. FIG. 4 is a perspective view for explaining an electrode, a separator, and an electrode body. FIG. 5 is a schematic diagram for explaining a posture correction unit according to another embodiment. FIG. 6 is a plan view for explaining a guide member according to another embodiment. FIG. 7 is a schematic diagram for explaining a merging portion according to another embodiment. FIG. 8 is a view for explaining a reference surface of a guide member according to another embodiment. FIG. 9 is a perspective view for explaining a guide member according to another embodiment. FIG. 10 is a schematic configuration diagram of a conventional winding machine.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In addition, the name of each component (each component) of this embodiment is a thing in this embodiment, and may differ from the name of each component (each component) in background art.

  As shown in FIGS. 1 to 3, the winding machine is a winding that winds in a state in which the transport unit 2 that transports the electrode 7 and the separator 8 and the electrode 7 and the separator 8 that are transported by the transport unit 2 are stacked. And a turning unit 3. This winding machine 1 winds the electrode 7 and the separator 8, and forms the electrode body 9 used for an electrical storage element (refer FIG. 4). The winding machine 1 of this embodiment forms the electrode body 9 used for nonaqueous electrolyte secondary batteries, such as a lithium ion secondary battery, for example. Hereinafter, after describing the electrode and separator wound (wound up) by the winding machine 1 with reference to FIG. 4, each configuration of the winding machine 1 will be specifically described.

  The electrode 7 of this embodiment has a positive electrode 71 and a negative electrode 72.

  The positive electrode 71 includes a strip-shaped metal foil 711 and a positive electrode active material layer (active material layer) 712 that is stacked on the metal foil 711 while leaving an end in the width direction (short direction) of the metal foil 711. . The metal foil 711 of this embodiment is, for example, an aluminum foil. The positive electrode active material constituting the positive electrode active material layer 712 includes a lithium metal oxide.

  The negative electrode 72 includes a strip-shaped metal foil 721 and a negative electrode active layer that is laminated on the metal foil 721 while leaving the end of the metal foil 721 in the width direction (short direction) and opposite to the positive electrode 71. A material layer 722. The metal foil 721 of this embodiment is a copper foil, for example. The negative electrode active material constituting the negative electrode active material layer 722 includes amorphous carbon such as soft carbon and hard carbon.

  The separator 8 of this embodiment is a strip-shaped member having insulation properties. Separator 8 is constituted by porous films, such as polyethylene, polypropylene, cellulose, polyamide, for example. In the winding machine 1 of the present embodiment, two separators 8 are used, one of which is also referred to as a first separator 81 and the other is also referred to as a second separator 82.

Each of the positive electrode 71, the negative electrode 72, and the separator 8 (the first separator 81 and the second separator 82) is placed in the winding machine 1 in a state of being wound in a roll shape (see FIG. 1). In the winding machine 1 of this embodiment, in order to form the electrode body 9, a roll (positive electrode roll) R _{1 of the} positive electrode 71, a roll (negative electrode roll) R _{2 of the} negative electrode 72, and a roll ( A first separator roll (R ₃ ) and a second separator 82 roll (second separator roll) R ₄ are arranged.

  Next, each configuration of the winding machine 1 will be described in detail with reference to FIGS.

  The transport unit 2 includes a separator transport unit 4 that transports the separator 8 to the winding unit 3, and an electrode transport unit 5 that transports the electrode 7 to the winding unit 3. The transport unit 2 superimposes the separator 8 transported by the separator transport unit 4 and the electrode 7 transported by the electrode transport unit 5 (that is, the electrode 7 and the separator 8 transported by different transport paths are joined together). And a merging portion 10 to be supplied to the winding portion 3. Further, the transport unit 2 includes a separator cutting unit 11 between the merging unit 10 and the winding unit 3.

The separator transport unit 4 transports the separator 8 from the separator rolls R ₃ and R ₄ to the joining unit 10. The separator transport unit 4 of the present embodiment includes two separator transport units (a first separator transport unit 41 and a second separator transport unit 42). Each separator conveyance part 41 and 42 is different from the corresponding separator roll (first separator roll R ₃ , second separator roll R ₄ to junction part 10) through the separator 8 (first separator 81, second separator 82). Each of the first and second separator transport sections 41 and 42 has a plurality of transport rollers 6. At least a pair of transport rollers included in the plurality of transport rollers 6 connects the separator 8 to the joining section 10. The first delivery unit 61 is configured to feed out (push out) the first part 61. The first delivery part 61 of the present embodiment is a nip roller that feeds the separator 8 in a state of being sandwiched between the pair of conveying rollers 6. The first and second separator conveying portions 41 and 42 are configured so that the two separators 81 and 82 overlap in the vertical direction in the merging portion 10. In so that a conveying path for conveying the separators 81 and 82, respectively.

  The electrode transport unit 5 includes a positive electrode transport unit 51 that transports the positive electrode 71 and a negative electrode transport unit 52 that transports the negative electrode 72.

The positive electrode transport unit 51 includes a plurality of transport rollers 6 and a positive electrode cutting unit 510 that cuts the positive electrode 71 when the positive electrode 71 having a predetermined length is transported to the joining unit 10, and the positive electrode roll R ₁ The positive electrode 71 is conveyed (guided) from the first to the junction 10. Each of the plurality of conveying rollers 6, positive electrode 71 is arranged to face the merging portion 10 from the cathode roll R ₁ through a predetermined transport path. Further, at least a pair of the transport rollers included in the plurality of transport rollers 6 constitutes a second delivery unit 62 that sends out (pushes out) the positive electrode 71 toward the joining unit 10. The second delivery unit 62 of the present embodiment is a nip roller that delivers the positive electrode 71 while being sandwiched between the pair of transport rollers 6. The positive electrode transport unit 51 of the present embodiment includes a plurality of second delivery units 62 and transports the positive electrode 71 through a transport path that overlaps the two separators 81 and 82 in the joining unit 10.

  The positive electrode cutting unit 510 has a positive electrode cutting blade that cuts the positive electrode 71. The positive electrode cutting blade is disposed between the merging portion 10 and the second delivery portion 62 disposed closest to the merging portion 10 upstream of the merging portion 10 in the conveyance path of the positive electrode 71. .

The negative electrode transport unit 52 includes a plurality of transport rollers 6 and a negative electrode cutting unit 53 that cuts the negative electrode 72 when a negative electrode 72 having a predetermined length is transported to the merge unit 10, and the negative electrode roll R _2. The negative electrode 72 is transported (guided) from the merging portion 10 to the merging portion 10. Each of the plurality of conveying rollers 6, negative electrode 72 is arranged to face the merging portion 10 from the negative electrode roll R ₂ through a predetermined transport path. In addition, at least a pair of the transport rollers included in the plurality of transport rollers 6 constitutes a third delivery unit 63 that sends out (pushes out) the negative electrode 72 toward the joining unit 10. The third delivery portion 63 of the present embodiment is a nip roller that delivers the negative electrode 72 while being sandwiched between the pair of transport rollers 6.

  The negative electrode transport unit 52 of the present embodiment has a plurality of third delivery parts 63, and transports the negative electrode 72 through a transport path in which the negative electrode 72 is supplied between the two separators 81 and 82 in the merging unit 10. .

  The negative electrode cutting unit 53 is a cutting unit that sends the negative electrode cutting blade 54 that cuts the negative electrode 72 and the negative electrode 72 cut by the negative electrode cutting blade 54 (that is, the negative electrode having a free end at the tip) toward the junction 10. It has a sending part (sending part) 55 and a posture correcting part 56 for correcting the posture of the negative electrode 72 sent from the cutting part sending part 55.

  The negative electrode cutting blade 54 is disposed between the joining portion 10 and the cutting portion feeding portion 55 in the conveyance path of the negative electrode 72. That is, the cutting part sending part 55, the negative electrode cutting blade 54, and the merging part 10 are arranged in order from the upstream in the conveyance path of the negative electrode 72. The negative electrode cutting blade 54 of the present embodiment is close to the cutting portion feeding portion 55.

  The cutting part delivery part 55 is a third delivery part that is closest to the joining part 10 among the plurality of third delivery parts 63 in the negative electrode transport part 52. The cutting portion feeding portion 55 (63) of the present embodiment is a nip roller constituted by a pair of transport rollers 6.

  The posture correction unit 56 has a reference surface 560 that extends from the cutting unit sending unit 55 toward the joining unit 10 and faces the negative electrode 72 that faces the joining unit 10 from the cutting unit sending unit 55, and is sent out from the cutting unit sending unit 55. The negative electrode 72 is aligned along the reference plane 560. In addition, the posture correction unit 56 includes an intake unit (first intake unit) 562 that intakes air in the direction from the conveyed negative electrode 72 toward the reference surface 560 on the reference surface 560. The posture correction unit 56 is between the junction 10 and the cutting unit delivery unit 55 (that is, the third delivery unit 63 closest to the junction 10) on the conveyance path of the negative electrode 72, and more specifically, the junction unit 10 and It arrange | positions between the negative electrode cutting blades 54. FIG.

  Specifically, the posture correction unit 56 includes a guide member 561 including the reference surface 560, and a first intake unit 562 and a second intake unit 563 that cause the negative electrode sent from the cutting unit sending unit 55 to run along the reference surface 560. Have.

  The guide member 561 is a member that extends along the conveyance path of the negative electrode 72 from the negative electrode cutting blade 54 toward the joining portion 10. The guide member 561 of the present embodiment is a flat plate member (guide plate) disposed below the conveyance path of the negative electrode 72. The guide member 561 of the present embodiment is a metal guide plate. In this guide member 561, the surface facing upward (the surface facing the conveyed negative electrode 72) is the reference surface 560.

  The reference surface 560 is a rectangular smooth surface (having a low friction coefficient) that is long in the direction from the negative electrode cutting blade 54 toward the joining portion 10. The reference surface 560 of the present embodiment is a mirror-finished metal surface. The width of the reference surface 560 (the dimension in the short side direction (vertical direction in FIG. 3)) is larger than the width of the negative electrode 72. At least one slit 564 extending in the width direction of the reference surface 560 and penetrating through the guide member 561 in the thickness direction of the guide member 561 is provided in the vicinity of the negative electrode cutting blade 54 on the reference surface 560.

  The first intake portion 562 has a nozzle connected to the slit 564 from the lower side of the guide member 561 (the surface opposite to the reference surface 560), and sucks air from the nozzle through the slit 564 (see arrow α in FIG. 2). . The second intake portion 563 is disposed with the opening facing the reference surface 560 at a position facing the reference surface 560 with a space therebetween so that the negative electrode 72 can pass between the second intake portion 563 and the reference surface 560 of the guide member 561. And intake air from the nozzle (see arrow β in FIG. 2). That is, the negative electrode 72 delivered from the cutting part delivery part 55 is sucked toward the reference surface 560 by the first air intake part 562 and sucked in a direction away from the reference surface 560 by the second air intake part 563. At this time, a negative electrode (a negative electrode having a free end at the tip) 72 fed from the cutting portion feeding portion 55 and heading toward the joining portion 10 advances along the reference surface 560, and the negative electrode is directed to the reference surface 560. The intake air amounts of the first intake portion 562 and the second intake portion 563 are controlled so that the progress along the reference surface 560 is not hindered due to sticking or the like.

  The junction 10 overlaps the electrodes 7, the separators 8, or the electrodes 7 and the separator 8 in the transport path of the electrodes 7 (positive electrode 71, negative electrode 72) and separator 8 to the winding part 3. In the merging unit 10 of the present embodiment, the positive electrode 71, the first separator 81, the negative electrode 72, and the second separator 82 are overlapped and sent to the winding unit 3. That is, the merging unit 10 is a position (part) where the conveyance path of the positive electrode 71, the conveyance path of the negative electrode 72, and the conveyance paths of the first and second separators 81 and 82 merge in the winding machine 1. The merging unit 10 of the present embodiment is a pinch roller, and is conveyed (injected) to the pinch roller by the positive electrode conveyance unit 51, the negative electrode conveyance unit 52, the first separator conveyance unit 41, and the second separator conveyance unit 42. ) The positive electrode 71, the negative electrode 72, and the separator 8 (first and second separators 81 and 82) are overlapped and sent to the winding unit 3.

  The separator cutting unit 11 cuts the separator 8 when the separator 8 having a predetermined length is conveyed to the winding unit 3. The separator cutting unit 11 according to the present embodiment cuts the first and second separators 81 and 82 in an overlapped state.

  The winding unit 3 winds the electrode 7 and the separator 8 conveyed by the conveyance unit 2 so that the separator 8 is positioned between the electrodes 7. Specifically, the winding part 3 is a winding spindle (winding) that winds the electrode 7 (the positive electrode 71 and the negative electrode 72) and the separator 8 (the first separator 81 and the second separator 82) by rotating around the axis. Rotation axis) 31. The winding portion 3 is in a state where the separator 8 is laminated between the positive electrode 71 and the negative electrode 72 (more specifically, the positive electrode 71, the first separator 81, the negative electrode 72, and the second separator). 82 in a state in which they are sequentially overlapped), and the positive electrode 71, the first separator 81, the negative electrode 72, and the second separator 82 that are supplied by the transport unit 2 (specifically, sent out from the merging unit 10) remain stacked. Is wound by the winding spindle 31.

  The winding machine 1 configured as described above forms (manufactures) the electrode body 9 by winding the electrode 7 and the separator 8 as follows.

A positive electrode roll R ₁ , a negative electrode roll R ₂ , a first separator roll R ₃ , and a second separator roll R ₄ are arranged at predetermined positions of the winding machine 1. The positive electrode 71, the negative electrode 72, the first separator 81, and the second separator 82 drawn from the rolls R ₁ , R ₂ , R ₃ , R ₄ pass through the conveyance paths of the conveyance units 51, 52, 41, 42. (See FIG. 1). At this time, each conveyance part 51,52,41,42 is the positive electrode 71 and the negative electrode so that the positive electrode 71 and the negative electrode 72 reach the winding part 3 after the first separator and the second separator reach the winding part 3. 72, the 1st separator 81, and the 2nd separator 82 are conveyed.

  The positive electrode 71, the negative electrode 72, the first separator 81, and the second separator 82 conveyed to the merge unit 10 are arranged in the order of the positive electrode 71, the first separator 81, the negative electrode 72, and the second separator 82 in the merge unit 10. And is fed to the winding section 3 (specifically, the winding spindle 31). When the stacked positive electrode 71, negative electrode 72, first separator 81, and second separator 82 reach the winding spindle 31, in this state, the winding machine 1 rotates the winding spindle 31 and each conveying unit. The nip rollers (feeding portions) 61, 62, and 63 of 51, 52, 41, and 42 are rotated (driven), respectively. As a result, the positive electrode 71, the negative electrode 72, and the separators 81 and 82 are wound around the winding spindle 31.

  When the positive electrode 71 and the negative electrode 72 having a predetermined length are wound by the winding spindle 31, the positive electrode 71 and the negative electrode 72 are cut at the positive electrode cutting part 510 and the negative electrode cutting part 53, and the first and second separators are cut. Only 81 and 82 are conveyed toward the junction 10. When the first and second separators 81 and 82 having a predetermined length are wound by the winding spindle 31 after the positive electrode 71 and the negative electrode 72 are cut, the first and second separators 11 and 82 are overlapped by the separator cutting unit 11. The second separators 81 and 82 are cut. Then, when the end portions of the cut first and second separators 81 and 82 are stopped with an end stop tape or the like, the positive electrode 71, the negative electrode 72, the first separator 81, and the second separator 82 The wound body is removed from the winding spindle 31, and the electrode body 9 is completed.

  Subsequently, the tips of the first separator 81 and the second separator 82 are fixed to the winding spindle 31, and the winding spindle 31 starts to rotate. When the first and second separators 81 and 82 having a predetermined length are wound by the winding spindle 31, the positive and negative electrodes are cut while the winding of the first and second separators 81 and 82 by the winding spindle is continued. The positive electrode 71 and the negative electrode 72 whose leading ends are free ends by cutting are sent out toward the joining part 10 by the second delivery part 62 immediately upstream of the section and the cutting part delivery part 55 (63).

  At this time, a negative electrode (a negative electrode whose tip is a free end) 72 sent out (pushed out) by the cutting part sending part 55 by the suction of the first and second suction parts 562 and 563 is a reference plane of the guide member 561. Proceed along 560. As a result, the negative electrode 72 advances (sends out) to the junction 10 without causing a positional shift due to bending or wobbling in the width direction. Further, since the positive electrode 71 is directed to the joining portion 10 in a state of being overlapped with the first separator 81, the positive electrode 71 is advanced (sent out) to the joining portion 10 without being bent or displaced.

  When the positive electrode 71 and the negative electrode 72 reach the winding spindle 31 via the junction 10, the positive electrode 71 and the negative electrode 71 together with the first and second separators 81 and 82 are wound until the positive electrode 71 and the negative electrode 72 having a predetermined length are wound. 72 continues to be supplied to the winding spindle 31. Thereafter, as described above, cutting of the positive electrode 71 and the negative electrode 72, winding of the first and second separators 81 and 82 of a predetermined length after the cutting, cutting and end stop of the first and second separators 81 and 82, Are performed in order. In the winding machine 1, the above operation is repeated, and the electrode bodies 9 are sequentially formed.

  According to the winding machine 1 described above, the posture of the negative electrode 72 that is fed toward the joining portion 10 and the tip is a free end is corrected by the posture correcting portion 56 (that is, the cutting portion feeding portion (this embodiment) In the example of the embodiment, the bending caused by being pushed out from the nip roller 55 is suppressed), so that the bending or the like between the strip-shaped members (the positive electrode 71, the negative electrode 72, and the separators 81, 82) overlapped in the joining portion 10 Misalignment due to the is prevented. Thereby, the winding | deviation of the electrode 7 and the separator 8 in the formed electrode body 9 is suppressed. That is, by manufacturing the electrode body 9 using the winding machine 1, the electrode body 9 with little winding deviation (suppressed) can be obtained.

  In the winding machine 1 of the present embodiment, a simple configuration such as a flat guide member (member having a rectangular smooth reference surface 560) 561 is sent out toward the joining portion 10 and the tip becomes a free end. The posture of the negative electrode 72 can be corrected appropriately.

  Further, in the winding machine 1 of the present embodiment, the first intake portion 562 allows the negative electrode 72 having a free end to be along the reference surface 560, so that the negative electrode 72 is moved by another member or the like. The contact resistance when the negative electrode 72 runs along the reference surface 560 can be suppressed as compared with the case where the negative electrode 72 runs along the reference surface 560 as compared with the case where the negative electrode 72 is pushed along the reference surface 560. Thereby, the bending etc. resulting from the contact resistance in the negative electrode 72 is suppressed, and as a result, the bending etc. between the strip-shaped members (the positive electrode 71, the negative electrode 72, the separators 81, 82) overlapped in the junction 10 are caused. It is possible to more effectively prevent misalignment.

  Further, in the winding machine 1 of the present embodiment, since the posture correction unit 56 includes the first intake unit 562 and the second intake unit 563, the negative electrode 72 when the negative electrode 72 is placed along the reference plane 560, It becomes easy to reduce the frictional resistance with the reference surface 560. That is, the intake air amount from both sides of the negative electrode 72 (the intake air by the first and second intake portions 562 and 563) is compared with the case where the intake air is intake only by the first intake portion 562 (that is, intake from the reference surface 560 side). By adjusting the respective amounts, it is easy to reduce the frictional resistance between the negative electrode 72 and the reference surface 560 when the negative electrode 72 is moved along the reference surface 560. Thereby, in the winding machine 1, the bending of the negative electrode 72 resulting from the said frictional resistance can also be prevented, As a result, the position shift of an electrode (or separator) can be prevented more effectively and reliably.

  In addition, since the first and second intake portions 562 and 563 are arranged at the downstream position of the negative electrode cutting blade 54, the metal generated when the negative electrode 72 is cut by the negative electrode cutting blade 54 (for example, metal chips or the like) ) Is attached to either the front surface (upper surface in FIG. 2) or the rear surface (lower surface in FIG. 2) of the negative electrode 72 by suction by the first and second intake portions 562 and 563. Since it is removed, it is possible to prevent the metal from being mixed into the formed electrode body 9.

  In addition, the winding machine of this invention and the manufacturing method of an electrode body are not limited to the said embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention. For example, the configuration of another embodiment can be added to the configuration of a certain embodiment, and a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment. Furthermore, a part of the configuration of an embodiment can be deleted.

  In the winding machine 1 of the above embodiment, the posture correction unit 56 is provided only in the negative electrode transport unit 52, but is not limited to this configuration. The posture correction unit 56 may be provided in the positive electrode transport unit 51. In addition, if the separator cutting unit 11 is provided upstream of the merging unit 10, the posture correcting unit 56 may be provided in the separator transport unit 4.

  A specific configuration in which the electrode 7 or the separator 8 whose tip is a free end is arranged along the reference surface 560 is not limited. For example, in the winding machine 1 of the above-described embodiment, the electrode 7 or the separator 8 having the free end at the tip end is sucked from the both surfaces by the first and second air intake portions 562 and 563. The electrode 7 or the separator 8 having a free end at the front end is aligned along the reference surface 560 only by the intake air directed toward the reference surface 560 by the first intake portion 562. May be. In addition, the posture correction unit 56 presses the electrode 7 or the separator 8 against the reference surface 560 by an air supply unit that supplies (or blows out) a gas such as air, so that the electrode 7 whose front end is a free end. Or the structure which makes the separator 8 follow the reference plane 560 may be sufficient. In this case, the air supply unit is opposed to the reference surface 560 at an interval (for example, the second intake unit 563 in the above embodiment is positioned so that the electrode 7 or the separator 8 can pass between the air supply unit 560 and the reference surface 560. The air is supplied toward the reference plane 560 from the position where it is disposed.

  Further, the specific configuration of the posture correction unit 56 is not limited. Deflection in the electrode 7 or the separator 8 caused by being pushed out by the delivery portions 61, 62, 63 by contacting (contacting) a member having an interval that allows the electrode 7 or the separator 8 to pass in the thickness direction. Further, it may be configured to suppress fluctuations in the traveling direction. For example, it may be constituted by a pair of free rollers having a metal surface and having a gap in the thickness direction, a pair of guide members 56A as shown in FIG.

  The guide member 561 of the above embodiment is a plate-like member, but is not limited to this configuration. The guide member 561 may have another shape such as a block shape as long as it has the reference surface 560.

  In the winding machine 1 of the above-described embodiment, the guide member 561 is provided with one slit 564 and sucked through the slit 564 so that the negative electrode 72 and the like whose free ends are along the reference surface 560. However, it is not limited to this configuration. It is sufficient that at least one opening for intake air provided in the guide member 561 is provided, and the shape is not limited. For example, as shown in FIG. 6, a plurality of circular holes 565 may be provided in the guide member 561, and a plurality of slits arranged at intervals in the delivery direction may be provided in the guide member 561.

  Moreover, the specific structure of the junction part 10 is not limited. For example, the merging portion 10 of the above embodiment is a pinch roller, but may be a pair of members 12 spaced apart vertically as shown in FIG.

  Although the reference surface 560 in the winding machine 1 of the said embodiment is a rectangular smooth surface, it is not limited to this structure. The reference surface 560 only needs to extend in the delivery direction (the direction from the delivery parts 61, 62, 63 to the joining part 10), and may be curved in the width direction of the electrode 7 as shown in FIG. Good. Further, the number of guide members 561 having the reference surface 560 may not be one. For example, as illustrated in FIG. 9, a plurality of guide members 561 having a reference surface 560 may be disposed.

DESCRIPTION OF SYMBOLS 1 ... Winding machine, 2 ... Conveying part, 3 ... Winding part, 31 ... Winding spindle, 4 ... Separator conveying part, 41 ... First separator conveying part, 42 ... Second separator conveying part, 5 ... Electrode conveying part , 51... Positive electrode transport section, 510... Positive electrode cutting section, 52... Negative electrode transport section, 53... Negative electrode cutting section, 54. Guide member, 560... Reference surface, 561. Guide member, 562... First intake portion, 563... Second intake portion, 564... Slit, 565. ... Electrode, 71 ... Positive electrode, 711 ... Metal foil, 712 ... Positive electrode active material layer, 72 ... Negative electrode, 721 ... Metal foil, 722 ... Negative electrode active material layer, 8 ... Separator, 81 ... First separator, 82 ... Second separator , 9 ... Electrode body, 10 ... Junction DESCRIPTION OF SYMBOLS 11 ... Separator cutting part, 12 ... A pair of member spaced apart up and down, 100 ... Battery winding machine, 101 ... Winding part, 102 ... Negative electrode sheet, 103 ... Positive electrode sheet, 104 ... Second separator, 110 ... Negative electrode transfer means, 111 ... conveying roller, 112 ... cutter, 120 ... positive transport means 121 ... conveying roller, 122 ... cutter, 130 ... second separator transport means 131 ... conveying roller, 132 ... cutter, R 1 _... positive electrode roll, R ₂ ... negative roll, R 3 _... first separator roll, R 4 _... second separator roll

Claims (3)

A winding part for winding the electrode and the separator in a stacked state;
In the transport path of the electrode and the separator to the winding part, the electrodes, the separators, or a joining part where the electrodes and the separator are overlapped,
A delivery part that feeds the electrode or the separator whose tip is a free end toward the joining part;
A posture correcting unit that is disposed between the merging unit and the sending unit and that corrects the posture of the electrode or the separator fed from the sending unit ;
The posture correction unit is
A reference surface extending from the delivery portion toward the junction and facing the electrode or the separator from the delivery portion toward the junction;
A first air intake portion that inhales in the direction from the electrode or the separator toward the reference surface at the reference surface;
A second air intake portion that inhales in a direction away from the reference surface at a position facing the reference surface so as to allow the electrode or the separator to pass between the reference surface and the reference surface;
A winding machine that has the electrode or the separator fed from the feeding section along the reference plane . A cutting part for cutting the electrode to form the tip;
The delivery unit, to exit sends the electrode, the winding machine according to claim 1. It is wound while stacking the electrode and separator by winding machine according to claim 1 or 2, comprising a manufacturing method of an electrode body.

Images