KR101395685B1 - Winding device - Google Patents

Abstract

[PROBLEMS] To provide a winding device capable of suppressing the deterioration of the quality of the obtained winding element while improving the productivity.
When the various sheets 2 to 5 are wound on the winding core 13 of the winding position P1 to some extent, the winding core 13 moves to the removed position P2, The winding core 14 moves to the winding position P1 and the various sheets 2 to 5 are inserted into the slit of the winding core 14. [ The winding work by the winding core 13 is continued and the end portions 4e and 5e of the electrode sheets 4 and 5 wound by this winding are wound by the winding core 14 A dotted line hole 150 which is a section of the electrode sheet 4 or 5 to be wound at the next time is guided into the slit of the core 14 The winding operation by the winding core 13 is once stopped and the electrode sheets 4 and 5 are gripped by the gripping means of the supply mechanism. The electrode sheets 4 and 5 are cut in the dashed line holes 150 by the winding force of the core 13 while holding the electrode sheets 4 and 5, do.

Description

WINDING DEVICE

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding apparatus for obtaining a winding element incorporated in, for example, a secondary battery.

For example, in a battery element used as a secondary battery such as a lithium ion battery, a positive electrode sheet coated with a positive electrode active material (active material) and a negative electrode sheet coated with a negative electrode active material In a {polymerized} state, which are superimposed on each other via two separators each made of a polyolefin resin.

In the winding apparatus for manufacturing the corresponding {overhead} battery element, the electrode sheets and the separators fed from the rolls wound in the form of {raw material} are transported to the winding unit along separate transportation paths {transportation path} And the electrode sheet and each separator are wound in a state in which the electrode sheets and the separators are stacked in the winding section.

Examples of the constitution of the winding section include a turret rotatably provided and a plurality of windings which are disposed at a predetermined interval apart from each other along the rotation direction of the turret, core} is known (see, for example, Patent Document 1, etc.).

In this configuration, two separators are wound around the first core in the first position (winding position) to some extent, winding up}, the positive (positive and negative) positive electrode sheet is inserted between the both separators, and the winding of the positive electrode sheet starts.

Then, when each electrode sheet is wound with a predetermined length, the winding is once stopped, and a predetermined grip (gripping; Each electrode sheet is gripped by means of grip, grasp, and hold, and then each electrode sheet is cut. When each of the electrode sheets is cut, the first winding core is rotated again, and the end {end} portion of each electrode sheet (the portion left after the winding) is wound { winding up, take up}.

Thereafter, without rotating the separator, the turret is rotated to move the first winding in a state in which the separator is still connected to the second position (remove, detach) And moves the second revolver which is not yet newly to the first position.

Here, the separator is fixed to the second core by some degree (somewhat) winding or the like. As a result, the separator is placed between the first core moved to the second position and the second core moved to the first position. In this state, the separator is cut between the positive core. Thereafter, the winding work of a series of battery elements with respect to the first winding core is completed by winding the end portion (winding residual portion) of the separator on the first winding core. At the same time, the winding operation of the series of battery elements is started for the second winding core. Thereafter, this operation is repeated (repeatedly), and each electrode sheet and each separator are alternately wound {alternately} for each winding, whereby the battery elements are sequentially manufactured.

[Prior Art Literature]

[Patent Literature]

  [Patent Document 1] Japanese Patent Application Laid-Open No. 11-265726

However, in the prior art, every time a single battery element is wound, a process of winding the separator around the core and fixing the separator between the separators is necessary. It has become a factor that hinders the improvement of productivity.

In the case where the electrode sheet itself has a habit (warpage in the widthwise direction or the like), when the electrode sheet is cut after the winding is completed, The tension {tension} which has been applied until then is lost at the leading end (tip) portion of the leading end {right arrow over (b)} of FIG.

In this way, when the leading end portion of the electrode sheet held by the holding means is curved in the width direction, when the sheet leading end portion of the sheet is fed to the winding portion in starting the next { There is a possibility that the end edge portion is displaced in the sheet width direction with respect to the winding core of the winding section. When the sheet end edge portion is displaced with respect to the winding core and the winding operation is performed, the end of the sheet end edge portion may extend outward or the electrode sheet may be wound in a meandering manner, There is a concern that the quality of the resulting wound element may deteriorate.

In addition, residual stress is likely to remain in an electrode sheet produced by applying an active material to a predetermined metal sheet, and bending or the like easily occurs after production (after drying). Particularly, in an electrode sheet original plate of continuous coating type which has been used recently (recently) in the manufacture of a lithium ion battery element and the like, a predetermined portion in the sheet width direction generally becomes an active material coating portion and the remaining portion is a non- , Warpage in the sheet width direction is likely to occur relatively.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a winding device capable of suppressing deterioration in the quality of a resulting winding element while improving productivity.

Hereinafter, each item suitable for solving the above-mentioned problems will be described by item classification {item}. In addition, if necessary, specific action effects are given to the corresponding means.

MEANS FOR SOLVING THE PROBLEMS 1. A winding apparatus for winding an electrode sheet having a band shape coated with an active material and a strip-shaped separator made of an insulating material while supplying them from a predetermined supply mechanism while overlapping each other,

A turret rotatably provided with its own central axis as a rotation axis,

A plurality of turns arranged to be spaced apart from each other in the rotating direction of the turret and rotated with their own central axes as rotation axes and capable of winding the electrode sheet and the separator supplied from the respective supply mechanisms,

A slit provided at each of the wicks and capable of inserting the electrode sheet and the separator,

Fixing means capable of fixing the electrode sheet and the separator in the slit,

(Not shown) formed in the supply mechanism of the electrode sheet and capable of forming a broken line (for example, a small dotted line hole (hereinafter simply referred to as " dotted line hole " (For example, dotted line hole forming means)

A gripping means provided in the supply mechanism of the electrode sheet and capable of gripping the electrode sheet,

After winding the electrode sheet and the separator supplied from each of the supply mechanisms by a predetermined length against the first core in the first position in the plurality of winding units, the turret is rotated, and the first winding core is rotated to the second position Moving the second winding to the first position different from the first winding,

The end portion of the electrode sheet wound by the first core and the portion of the electrode sheet which is to be wound next by the second core so as to be separated from the leading end of the electrode sheet, ; A step

Inserting the electrode sheet and the separator disposed from the first core located at the second position to each of the supply mechanisms with respect to the slit of the second core located at the first position;

A step of positioning the formation position of the broken line of the electrode sheet at a predetermined position in the slit of the second winding core by winding the electrode sheet and the separator by the first winding located at the second position,

A step of gripping the electrode sheet by the gripping means after the electrode sheet is positioned,

A step of cutting the electrode sheet at a position where the broken line is formed by winding the electrode sheet and the separator by the first core in a state of holding the electrode sheet by the holding means;

Winding the end portion of the electrode sheet by winding the electrode sheet and the separator by the first core after the electrode sheet is cut off;

Fixing the electrode sheet and the separator to be wound next by the second winding core in the slit of the second winding core by the fixing means;

A step of cutting the separator arranged from the first core to the second core,

And a step of winding the end portion of the separator by the first core after the separator is cut off.

Means 2. A winding device according to the first aspect, characterized in that it has a protective tape attaching means for sticking (pasting) a protective tape in advance to a portion where the breaking line is formed by the breaking line forming means.

3. The protective tape attaching device according to claim 3,

Sheet cutting means for cutting the electrode sheet at a position to be a section of the electrode sheet wound by the core,

And an upstream-side grip portion capable of gripping the electrode sheet on the upstream side of the cutting means when the electrode sheet is cut by the sheet cutting means, and a downstream-side grip portion capable of gripping the electrode sheet on the downstream side of the cutting means, And after the sheet is cut, the sheet holding means is configured to move relative to each other along a sheet conveying direction while holding each of the holding portions with the corresponding electrode sheet;

A protective tape is attached to both the front and back surfaces of the electrode sheet so as to connect the upstream side portion and the downstream side portion of the electrode sheet separated by the sheet holding means and the gap between the upstream side portion and the downstream side portion of the electrode sheet And a tape attaching means configured to adhere the bonding tape to each other at {gap}

The breaking line forming means

And the breaking line is formed with respect to a portion where the double-purpose tape is adhered to each other.

Means 4. The electrode sheet and the separator disposed between the first core and the second core relative to the rotating direction of the turret, the first core being located at the second position, 3. The winding device according to any one of the above-mentioned means 1 to 3, characterized in that the drawing is provided with a supporting roller.

According to the means 1, when the electrode sheet and the separator are wound to some extent with respect to the first winding in the first position, the first winding core moves to the second position and the second winding core moves to the first position , The electrode sheet and the separator are inserted into the slit of the second winding core. In this state, the winding operation by the first winding is continued, and the position at which the end portion of the electrode sheet wound by the first winding core and the leading end portion of the electrode sheet to be wound next by the second winding core The position at which the break line is formed) is guided into the slit of the second winding core, the winding operation by the first winding core is once stopped and the electrode sheet is held by the holding means of the supply mechanism. Then, the electrode sheet is cut at the broken line by the winding force by performing the winding work by the first winding while holding the electrode sheet. Further, after the winding work by the first winding is completed, the electrode sheet and the separator to be wound next are fixed by the fixing means in the slit of the second winding core.

As a result, there is no need to carry out a process of feeding the electrode sheet to the winding core from the supply mechanism every time the winding operation of one winding element is performed, so that productivity can be improved.

In addition, in the state in which the end portion of the electrode sheet to be wound next to the second winding core is introduced (introduced) with the end portion of the electrode sheet wound around the first winding core, Since the electrode sheet is cut and fixed, the positional deviation of the leading end portion of the electrode sheet and the like are hardly caused, and deterioration of the quality of the resulting wound element can be suppressed.

In addition, since the step of winding and fixing the separator to the winding core is not necessary, the amount of use of the separator can be reduced and the cost can be reduced.

In addition to this, in the means 1, a plurality of winding cords are moved and a winding is sequentially performed. In other words, the end of the separator can be wound around the first core, and the new core can be started at the second core. As a result, productivity can be improved as compared with a winding apparatus having only one winding.

When the electrode sheet is cut, a burr or an edge is formed in the cut portion, thereby damaging the separator and causing {short-circuit} of short-circuiting. In the cut portion of the electrode sheet, the active material may be peeled off due to an impact at the time of cutting. Particularly, when the electrode sheet is cut in the slit of the winding core as in the above-mentioned means 1, there is a risk that the cut-out debris of the metal sheet, the powder of the active material, etc. is caught in the winding element.

On the other hand, by sticking a protective tape in advance to the broken line forming position of the electrode sheet as in the above-mentioned means 2, it is possible to suppress the occurrence of various problems (inconveniences) and to improve the quality of the resulting wound element .

According to the above-mentioned Means 3, first of all, from a roll-like disk, for example, delivery, let-out; The strip-shaped electrode sheet continuously transported is temporarily cut at a position where it becomes a section of the electrode sheet for one element to be wound, prior to winding by the winding. Subsequently, the upstream portion and the downstream portion of the cut electrode sheet are separated from each other, and a gap is formed between them. In this state, a protection tape is attached to both sides of the electrode sheet so as to connect the upstream side portion and the downstream side portion of the electrode sheet in the clearance, and one protective sheet is formed as one electrode sheet. Thereafter, a broken line is formed on the portion where the double-stick tape is adhered to each other. Each time the predetermined length is wound, the electrode sheet is cut at the breaking line forming position of the protective tape made of a joint.

In addition, in the structure in which the protective sheet is attached without cutting the electrode sheet and the broken line is formed with respect to the attachment portion, when the electrode sheet is cut along the broken line, the cut surface is exposed, There is still a risk that the separator may be damaged by the burr or edge.

On the other hand, in the means 3, in the state where the cut surfaces of both ends (the leading end and the trailing end) of the one-element electrode sheet wound by the core are covered and protected by the protective tape adhered from both the front and back sides Therefore, the quality of the resulting wound element can be improved.

According to the means 3, since the electrode sheet can be cut and the protective tape can be attached in advance, for example, by synchronizing with the interval of the winding operation by winding, the electrode sheet can be continuously supplied, It is possible to employ the above-described attachment form of the protective tape, and it is possible to suppress the lowering of the productivity. Further, since the electrode sheet can be continuously conveyed from the disk, tension is easily applied, and skew correction and the like are also easy to perform.

In the means 3, since the metal sheet portion of the electrode sheet is cut in advance and is not cut in the slit of the winding core, the problem that cut-out debris of the metal sheet, powder of the active material, etc., It can be further reduced.

In the case where the first winding core is flat in cross section and the supporting roller is not provided, the electrode sheet and the separator which are arranged from the first winding core to the respective supply mechanisms at the time of winding the electrode sheet and the separator The position does not become constant, and it rattles.

Therefore, when the electrode sheet is cut by the winding force of the first winding core, an appropriate load is not applied to the dotted line hole, and there is a possibility that the electrode sheet can not be properly and smoothly cut. When the electrode sheet and the separator arranged from the first core to the respective supply mechanisms are inserted into the slit of the second winding core located at the first position, there is a possibility that the slit can not be properly inserted.

On the other hand, the position of the electrode sheet and the separator arranged from the support roller to the respective supply mechanisms can be stabilized by providing the support roller as in the means 4, irrespective of the rotational position of the first winding core. As a result, since the electrode sheet is pulled out in a state in which the electrode sheet extends straightly between the support roller and each of the supply mechanisms, an appropriate load is applied to the dotted line hole, so that the electrode sheet can be properly and smoothly cut. In addition, the electrode sheet and the separator can be appropriately inserted into the slit of the second winding core located at the first position.

Further, each of the above means may be embodied as a manufacturing method of a wound element.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a configuration of a battery element. Fig.
2 is a schematic configuration diagram of a winding device.
3 is a schematic configuration diagram of the winding section.
Fig. 4 is a schematic configuration diagram of the winding core.
5 is a schematic diagram showing a configuration of a cutting and attaching apparatus.
Fig. 6 is a schematic view for explaining the movement of the cutting and pasting apparatus during sheet cutting.
Fig. 7 is a schematic view for explaining the movement of the cutting and pasting apparatus after sheet cutting. Fig.
Fig. 8 is a schematic view for explaining the movement of the cutting and attaching apparatus in adhering the tape. Fig.
9 (a) to 9 (e) are schematic diagrams showing the state of an electrode sheet in a process of attaching a protective tape or the like.
Fig. 10 is an explanatory view of the operation of a winding apparatus showing a state in which various sheets are wound around a winding in a winding position.
11 is an explanatory view of the operation of a winding device showing a state in which one winding core moves to a removal position while winding various sheets and the other winding core moves to a winding position.
Fig. 12 is an explanatory diagram of the operation of the winding device showing a state in which various sheets are inserted into the slit of the empty winding core moved to the winding position.
Fig. 13 is an explanatory diagram of the operation of a winding device showing a state in which a dotted line hole is formed in an electrode sheet.
Fig. 14 is an explanatory view of the operation of the winding device showing a state in which the winding core located at the removal position is rotated and the various sheets are wound.
Fig. 15 is an explanatory view of the operation of a winding device showing a state in which the negative electrode sheet is held by the holding mechanism of the negative electrode sheet feeding mechanism.
Fig. 16 is an explanatory view of the operation of the winding device showing a state in which the negative electrode sheet is cut at the dotted line hole.
Fig. 17 is an explanatory diagram of the operation of the winding device showing a state in which the positive electrode sheet is held by the holding mechanism of the positive electrode sheet supplying mechanism. Fig.
18 is an explanatory view of the operation of a winding device showing a state in which the positive electrode sheet is cut at a dotted line hole.
Fig. 19 is an explanatory view of the operation of a winding device showing a state of cutting the separator. Fig.
Fig. 20 is an explanatory view of the operation of a winding device showing a state in which the end portion of the separator is wound up at the winding of the take-off position and the winding of the various sheets is started in the winding of the winding position.
21 (a) is a perspective view showing an electrode sheet in which dotted-line holes are formed in the present embodiment, and Figs. 21 (b) and 21 .

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

1, the lithium ion battery element 1 (hereinafter, simply referred to as " battery element 1 ") is connected to the positive electrode sheet 4 and the negative electrode sheet 2 via two separators 2 and 3, And the negative electrode sheet 5 is rolled up in a superimposed state. 1, separators 2 and 3 and electrode sheets 4 and 5 (hereinafter collectively referred to as " various sheets 2 to 5 " .

The separators 2 and 3 are formed in the shape of a band having the same width so as to prevent the other electrode sheets 4 and 5 from coming into contact with each other and short- It is composed of an insulator.

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

A plurality of positive electrode leads (not shown) extend from one end (one end) in the width direction of the electrostatic electrode sheet 4 and extend in the width direction (other end) A plurality of negative electrode leads (not shown) extend and protrude from the edges.

When the lithium ion battery is obtained, the wound battery element 1 is disposed (disposed) in a battery container (not shown) having a cylindrical shape and made of metal, and the positive electrode lead and the negative electrode lead are integrated do. Then, the integrated positive lead is connected to the positive electrode terminal part (not shown), and the negative electrode lead, which is uniformly integrated, is connected to the negative electrode terminal part (not shown) So that a lithium ion battery can be obtained.

Next, the winding device 10 for manufacturing the battery element 1 will be described. 2, the winding device 10 includes a winding section 11 for winding various sheets 2 to 5, a winding section 11 for supplying the positive electrode sheet 4 to the winding section 11, A negative electrode sheet feeding mechanism 41 for feeding the negative electrode sheet 5 to the winding unit 11 and separators 2 and 3 to the winding unit 11 And separator supply mechanisms 51 and 61 for discharging. Various mechanisms in the winding apparatus 10 such as the winding section 11 and the supply mechanisms 31, 41, 51 and 61 are configured so as to be controlled by a control device (not shown).

On the most upstream side of the electrostatic electrode sheet supply mechanism 31, a positive electrode sheet original 32 on which the positive electrode sheet 4 is wound in a roll shape is rotatably supported, and suitably {appropriately} 4) is drawn out.

In the middle of the conveying path of the positive electrode sheet 4 from the positive electrode sheet original 32 to the winding unit 11, the holding mechanism 71 as a holding means, the positioning mechanism A dotted line hole cutter 82 as a dotted line forming means (breaking line forming means), a detecting sensor 83, a first feeding roller 84, a buffer mechanism 85, a second feeding roller 86, There is provided a cutting attachment device 87 as a protective tape attaching means.

The gripping mechanism 71 is provided with a pair of clamps 71a and 71b capable of gripping the electrostatic electrode sheet 4. The clamps 71a and 71b are configured to be capable of opening and closing by a driving means not shown.

The position aligning mechanism 72 is provided at the position of the protective tape 100 (see FIG. 9C, etc.) to be described later attached to the positive electrode sheet 4, that is, the position of the battery element 1 ) Position of one positive electrode sheet (4) with respect to the dotted line hole cutter (82).

The positioning mechanism 72 has a pair of rollers 73 and 74 and a lift roller 75 disposed between the rollers 73 and 74 so as to be vertically displaceable. The elevating roller 75 is vertically driven by a driving means (not shown).

The alignment mechanism 72 drives the elevating roller 75 based on the detection result of the detection sensor 83 to align the position of the protective tape 100 with respect to the dotted line hole cutter 82 .

The positioning mechanism 72 also functions as a tension applying means for applying a predetermined tension to the positive electrode sheet 4 to be wound and preventing loosening (loosening) of the positive electrode sheet 4.

The dotted line hole cutter 82 has an upper blade 82a located on the upper side of the positive electrode sheet 4 and a lower blade 82b located on the lower side of the positive electrode sheet 4, And has a function of forming a dotted line hole 150 (see FIG. 21 (a)) as a broken line with respect to the protective tape 100.

The detection sensor 83 detects the protective tape 100 attached to the electrostatic electrode sheet 4.

The first feeding roller 84 has upper and lower pairs of rollers 84a and 84b connected to a motor (not shown) and sandwiches the positive electrode sheet 4 with both rollers 84a and 84b ; Electrode sheet 4 in accordance with the winding operation of the winding unit 11 while sandwiching the positive electrode sheet 4 and the negative electrode sheet 4 together.

On the other hand, the second feeding roller 86 is for positioning the attachment position of the protective tape 100 with respect to the cutting attachment device 87, and includes a pair of upper and lower pairs of rollers 86a and 86b , An encoder (not shown), and the like. The second feeding roller 86 is connected to the battery element (not shown) wound by the winding unit 11 based on the measured value of the encoder while sandwiching the positive electrode sheet 4 by the rollers 86a, 86b 1) one electrode sheet 4 is intermittently fed out.

The buffer mechanism 85 has a pair of driven rollers 85a and 85b and a lifting roller 85c displaced upward and downward between the rollers 85a and 85b, Absorbing amount of the electrostatic electrode sheet 4 by the second feeding roller 86 and the amount of feeding of the electrostatic electrode sheet 4 by the second feeding roller 86. [

5 and the like, the cutting attachment device 87 is for cutting the positive electrode sheet 4 and adhering the protective tape 100, and is a sheet cutting device for cutting the positive electrode sheet 4, A holding mechanism 91 as a sheet holding means for holding the positive electrode sheet 4 at the time of cutting the positive electrode sheet 4 by the cutter mechanism 90, 4 as a tape attaching means for attaching the protective tape 100 to the cut portion of the tape attaching mechanism.

The cutter mechanism 90 is constituted by an upper blade 90a located on the upper side of the positive electrode sheet 4 and a lower blade 90b located on the lower side of the positive electrode sheet 4, 90a, 90b can be retracted (retracted) out of the conveying path of the electrostatic electrode sheet 4. [

The gripping mechanism 91 has an upstream side grip portion 91a capable of gripping the positive electrode sheet 4 on the upstream side of the cutter mechanism 90 and an upstream side grip portion 91b on the downstream side of the cutter mechanism 90, The upstream-side grip portion 91a is configured to be able to advance and retreat along the conveying path of the electrostatic electrode sheet 4 with respect to the downstream-side grip portion 91b have.

More specifically, the upstream-side gripper 91a is moved from the retracted position, which is equivalent in phase distance away from the downstream-side gripper 91b, to the retracted position that is closest to the downstream-side gripper 91b And is movable between a closest approach position. In other words, the grip portions 91a and 91b are configured to be relatively movable in the direction in which they are spaced apart from each other along the sheet conveying direction. Although not shown in the drawings for simplicity, each of the grippers 91a and 91b includes a pair of upper and lower chucks (provided), and is configured such that the chuck is opened and closed by a driving means .

The tape attaching mechanism 92 is composed of an upper holding portion 92a for holding the protective tape 100 at an upper position of the positive electrode sheet 4 and a lower holding portion (Lower holding portion) 92b capable of holding and holding the protective tape 100 on the protective tape 100. Each of the holding and holding portions 92a and 92b moves up and down along the vertical direction by a driving means .

2, on the most upstream side of the negative electrode sheet supply mechanism 41, the negative electrode sheet master 42 on which the negative electrode sheet 5 is wound in a roll shape is rotatably supported, , The negative electrode sheet 5 is pulled out.

Similar to the positive electrode sheet feeding mechanism 31, the negative electrode sheet feeding mechanism 41 is provided with a holding mechanism 71 as a holding means, an alignment mechanism 72, and a dotted line hole forming means (broken line forming means) A dotted line cutter 82, a detection sensor 83, a first feeding roller 84, a buffer mechanism 85, a second feeding roller 86, a cutting attachment device 87 as a protective tape attaching means, and the like have.

The holding mechanism 71 in the negative electrode sheet feeding mechanism 41, the alignment mechanism 72, the dotted line hole cutter 82, the detection sensor 83, the first feeding roller 84, the buffer mechanism 85 The second feeding roller 86 and the cutting and attaching device 87 are the same as those of the electrostatic-electrode-sheet feeding mechanism 31, detailed description thereof will be omitted.

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

The separator discs 52 and 62 are supported so as to freely rotate, and the separators 2 and 3 are pulled out from the separators 2 and 3 as appropriate.

In the middle of the supply path of the various sheets 2 to 5, various sheets 2 to 5 such as a pair of guide rollers 88a and 88b having one sheet of the various sheets 2 to 5 Various guide rollers (not shown) are provided.

A gap of a predetermined amount is formed between the pair of guide rollers 88a and 88b and the electrode sheets 4 and 5 gripped by the gripping mechanism 71 (clamps 71a and 71b) (Pulled in) toward the winding section 11 by friction with the separators 2, Pull < RTI ID = 0.0 >}. ≪ / RTI >

Next, the configuration of the winding unit 11 will be described in detail. 3, the winding section 11 includes a disk-shaped turret 12 provided rotatably by a drive mechanism (not shown), and a disk- Two support rollers 15A and 15B installed at positions displaced by 90 degrees in the rotating direction of the turret 12 from the respective cores 13 and 14, A separator cutter 16 as a separator cutting means for cutting the sheets 2 and 3 and a pressing roller 17 for pressing various sheets 2 to 5 after they are wound.

The core cores 13 and 14 are for winding various sheets 2 to 5 on the outer peripheral side of their own, and are configured to be rotatable about their own central axes by a drive mechanism (not shown). The cores 13 and 14 are formed so as to be able to move up and down with respect to the turret 12 along the axial direction of the turret 12 Is installed.

As shown in Fig. 4, the core cores 13 ((14)) each have a pair of core pieces (cores; core pieces 13A and 13B (14A and 14B), and between the pair of core pieces 13A and 13B ((14A and 14B)), various sheets 2 to 5 are inserted, (13S) ((14S)) is formed.

The core 13 ((14)) has a chuck mechanism 13T ((14T)) as a fixing means for fixing various sheets 2 to 5 in the slit 13S It is equipped.

The chuck mechanism 13T (14T) is supported by a shaft support (not shown) such that it can rock (swing) against one of the core pieces 13A (14A) of the pair of core pieces 13A, 13B (Not shown) for driving the chuck member 13Ta (14Ta) and the chuck member 13Ta (14Ta) for driving the other chuck member 13Ta (14Ta) So that the various sheets 2 to 5 can be sandwiched between the chuck member 13Ta (14Ta) and the other core piece 13B (14B) .

The chuck member 13Ta (14Ta) is provided in the vicinity of one end of the slit 13S (14S) in the penetrating direction (lateral direction in FIG. 4).

The cores 13 and 14 are configured to be capable of turning (swirling) between the winding position P1 as the first position and the peeling position P2 as the second position by the rotation of the turret 12.

The winding position P1 is a position for winding the various sheets 2 to 5 relative to the winding cores 13 and 14. The winding position P1 is a position for winding the various sheets 2 to 5 from the supply mechanisms 31, 2 to 5) are supplied.

The peeling position P2 is a position for peeling off the various sheets 2 to 5, that is, the battery element 1 after winding. A detaching device (not shown) for detaching the battery element 1 from the cores 13 and 14 and the like are provided at the periphery of the detaching position P2.

The support rollers 15A and 15B are constituted by winding cores 13 and 14 which have moved to the removal position P2 and winding the various sheets 2 to 5 between the supply mechanisms 31, 41, 51 and 61, .

The separator cutter 16 is disposed in the vicinity of the winding position P1 and has a cut position for approaching the turret 12 and cutting the separators 2 and 3 and a cutting position for separating the separators 2 and 3 from the turret 12, And is movable to a retreat position that does not disturb movement.

The pressing roller 17 is disposed in the vicinity of the releasing position P2 and is disposed at a position close to the turret 12 to press the various sheets 2 to 5 after the winding, 14 to the retreat position which does not interfere with the movement.

Next, a method of manufacturing the battery element 1 by the above-described winding device 10 will be described.

First, the process of adhering the protective tape 100 to each of the electrode sheets 4, 5 will be described in detail by taking the case of the electrostatic electrode sheet 4 as an example. The negative electrode sheet 5 is also performed in the same manner as in the case of the positive electrode sheet 4.

As described later, the winding operation of one electrostatic electrode sheet 4 by the winding unit 11 is completed and the electrode sheet 4 is held by the holding mechanism 71 (clamps 71a and 71b) The first feeding roller 84 is stopped while the second feeding roller 86 continues to rotate, from which the electrostatic electrode sheet 4 on the upstream side is fed out. In the meantime, in the buffer mechanism 85, the lifting roller 85c is lowered, and the electrostatic electrode sheet 4 as much as it is fed is stored (stored; accumulate, contain}. Here, at least during the attachment operation of the protective tape 100 (during stoppage of the second feeding roller 86), the amount fed out by the first feeding roller 84 is stored.

When the electrostatic electrode sheet 4 is opened from the gripping mechanism 71 by the winding unit 11, the first feeding roller 84 and the second feeding roller 86 rotate synchronously and the electrostatic electrode sheet 4 is sequentially conveyed from the positive electrode sheet master 32 to the winding unit 11.

Subsequently, on the basis of the measurement value of the encoder provided on the second feeding roller 86, the division position X1 (Fig. 9A) of the electrostatic electrode sheet 4 for one element, which is wound by the winding section 11, (The cutter mechanism 90) is reached, the second feeding roller 86 is stopped. On the other hand, the first feeding roller 84 continues rotating operation, and the winding work by the winding section 11 is continued. Thus, while the second feeding roller 86 is stopped and the first feeding roller 84 is rotating, the lifting and lowering roller 85c rises in the buffer mechanism 85 and the stored positive electrode sheet 4 ) Will be extracted.

When the second feeding roller 86 stops and the conveyance of the electrostatic electrode sheet 4 on the upstream side is stopped, as shown in Fig. 6, the upstream gripper 91a and the upstream gripper 91a of the gripping mechanism 91 The downstream side grip portion 91b is driven to grip the positive electrode sheet 4 on the upstream side and the downstream side of the cutter mechanism 90. [ Then, in a state where the electrostatic electrode sheet 4 is gripped as described above, the cutter mechanism 90 is driven, and the electrostatic electrode sheet 4 is cut at the division position X1.

After cutting the sheet, the respective blades 90a and 90b of the cutter mechanism 90 are retracted out of the conveying path of the electrostatic electrode sheet 4 and the gripping portions 91a and 91b of the holding mechanism 91 are rotated Only the upstream-side grip portion 91a moves to the upstream side in the sheet conveying direction (the right side in Fig. 7) while holding the electrode sheet 4, as shown in Fig. As a result, a gap 4c is formed between the upstream portion 4a and the downstream portion 4b of the cut off positive electrode sheet 4 (see FIG. 9 (b)). During this time, the protective tape 100 is supplied to the both-side holding portions 92a and 92b of the tape sticking mechanism 92 from a predetermined feeding device in advance.

A gap 4c is formed between the upstream side portion 4a and the downstream side portion 4b of the positive electrode sheet 4 and then a tape adhering mechanism Holding portions 92a and 92b of the positive electrode sheet 92 are driven toward the positive electrode sheet 4, respectively. As a result, the protective tape 100 is stuck from both the front and back surfaces of the positive electrode sheet 4 so as to connect the upstream portion 4a and the downstream portion 4b of the positive electrode sheet 4, (See Fig. 9 (c)). In this case, the first and second protective tapes 100,

When the cutter mechanism 90, the gripping mechanism 91 and the tape attaching mechanism 92 are returned to their original states (see Fig. 5) and the attaching operation of the protective tape 100 is completed, The first feeding roller 84 and the second feeding roller 86 rotate in synchronization. As in the case before the sheet cutting, the electrostatic electrode sheet 4 is again provided with the upstream side portion 4a and the downstream side portion 4b successively connected by the protective tape 100 as one electrostatic electrode sheet 4 And is conveyed to the downstream side.

Next, the winding procedure of the battery element 1 by the winding section 11 will be described in detail. In this case, from the stage where the winding of the various sheets 2 to 5 of one battery element 1 is almost completed to the one core 13 as the first core, the other core 14 as the second core, Will be described in detail according to a process until the various sheets 2 to 5 start winding.

When the various sheets 2 to 5 are wound on the one winding core 13 at the winding position P1 by a predetermined length (see Fig. 10), the winding operation by the winding core 13 is not stopped, .

This allows one core 13 to move toward the peeling position P2 while winding the various sheets 2 to 5 while the other core 14 is immersed in the turret 12 And moves to the winding position P1 side (see Fig. 11).

When the cores 13 and 14 reach the peeling position P2 and the winding position P1, respectively, the rotation operation of the turret 12 and the rotation operation of the core 13 stop. In this state, various sheets 2 to 5 arranged from the guide rollers 88a and 88b to the core 13 are caught by the support rollers 15A and the support rollers 15A and the guide rollers 88a and 88b The various sheets 2 to 5 are put in a straight stretched state.

In the initial state in which the winding core 14 immersed in the turret 12 has reached the winding position P1, the rotation of the winding rollers 15a and 15b of the various sheets 2 to 5 disposed between the support roller 15A and the guide rollers 88a and 88b The longitudinal direction and the passing direction of the slit 14S of the core 14 become substantially parallel and the chuck member 14Ta is positioned in the vicinity of the end on the downstream side in the slit 14S do.

In this state, the core 14 protrudes from the turret 12. As a result, various sheets 2 to 5 are inserted into the slit 14S of the core 14 (see Fig. 12).

Accordingly, in the positive electrode sheet supplying mechanism 31 and the negative electrode sheet supplying mechanism 41, the aligning mechanism 72 drives the elevating roller 75 based on the detection result of the detecting sensor 83 And the dotted line hole forming position X2 (see FIG. 9 (d)) of the protective tape 100 stuck to each of the electrode sheets 4 and 5 is positioned with respect to the dotted line hole cutter 82.

Then, when the dotted line hole forming position X2 of the protective tape 100 is positioned, the dotted line hole cutter 82 is actuated (see Fig. 13) to form the dotted line hole 150 (see Fig. 21 (a) .

More specifically, as shown in Fig. 21 (a), the end portions 4e and 5e of the respective electrode sheets 4 and 5 for one element, which are wound by the core 13, A dotted line hole 150 is formed in a portion where the double-layered tape 100 positioned between the leading ends 4f and 5f of the electrode sheets 4 and 5 for one element to be wound next is bonded to each other .

Thereafter, the core 13 located at the peeling position P2 is rotated again, and the winding of the various sheets 2 to 5 is resumed (see Fig. 14).

The dotted line hole 150 (the end portion 5e and the leading end portion 5f (not shown) formed on the negative electrode sheet 5 on the basis of the measurement values of the encoder (not shown) provided in the winding portion 11 ) Reaches the predetermined position, the winding operation by the winding core 13 is stopped. The position of the starting end portion 5f of the negative electrode sheet 5 for one element to be wound next by the winding core 14 is positioned at a predetermined position in the slit 14S of the winding core 14 . Here, the leading end 5f of the negative electrode sheet 5 is located at least on the downstream side of the position of the chuck member 14Ta (see FIG. 4). 4, the protective tape 100 is omitted for the sake of convenience.

Thereafter, the holding mechanism 71 (clamps 71a and 71b) of the negative electrode sheet feeding mechanism 41 is driven to grip the negative electrode sheet 5 (see Fig. 15).

Subsequently, while holding the negative electrode sheet 5 by the holding mechanism 71, the core 13 located at the releasing position P2 is rotated to wind the various sheets 2 to 5. As a result, the negative electrode sheet 5 is cut at the dotted line hole 150 (see Fig. 9 (e)).

The position of the starting end portion 5f of the negative electrode sheet 5 for one element to be wound next by the winding core 14 is maintained at a predetermined position in the slit 14S of the winding core 14 On the other hand, the end portion 5e of the one-element negative electrode sheet 5 wound by the winding core 13 is wound around the winding core 13 (see Fig. 16).

The winding operation by the winding core 13 is stopped in a place where the dotted line hole 150 (the end portion 4e and the leading end portion 4f) formed on the electrostatic electrode sheet 4 reaches a predetermined position. The position of the starting end portion 4f of the positive electrode sheet 4 for one element to be wound next by the winding core 14 is positioned at a predetermined position in the slit 14S of the winding core 14 . Here, the starting end portion 4f of the positive electrode sheet 4 is positioned at least on the downstream side of the position of the chuck member 14Ta.

Thereafter, the holding mechanism 71 (clamps 71a and 71b) of the positive electrode sheet feeding mechanism 31 is driven to grip the positive electrode sheet 4 (see Fig. 17).

Subsequently, while the holding mechanism 71 grasps the electrostatic electrode sheet 4, the core 13 located at the releasing position P2 is rotated to wind the various sheets 2-4. Thereby, the electrostatic electrode sheet 4 is cut at the dotted line hole 150 (see Fig. 9 (e)).

The position of the starting end portion 4f of the electrostatic electrode sheet 4 for one element to be wound next by the winding core 14 is maintained at a predetermined position in the slit 14S of the winding core 14, The end portion 4e of the electrostatic electrode sheet 4 for one element to be wound by the coil spring 13 is wound around the core 13 (see Fig. 18).

The winding operation by the winding core 13 is stopped when winding of the end portions 4e and 5e of the positive electrode sheets 4 and 5 is completed and the separators 2 and 3 are wound by a predetermined amount.

Thereafter, the chuck mechanism 14T (chuck member 14Ta) of the core 14 is driven to fix the various sheets 2 to 5. At the same time, various sheets 2 to 5 wound on the core 13 are pressed by the pressing roller 17 (see Fig. 19).

When the separators 2 and 3 are fixed to the core 14, the separator cutter 16 operates to cut the separators 2 and 3 in the vicinity of the core 14 (see Fig. 19). This allows the separators 2 and 3 to be cut to a length as long as the length of the separators 2 and 3 from the core 14 is wound and the leading ends of the separators 2 and 3 are wound around the leading ends of the electrode sheets 4 and 5 (4f, 5f) are covered (see Fig. 4).

After cutting the separators 2 and 3, the core 13 is rotated while the various sheets 2 to 5 are pressed by the pressing roller 17 (see Fig. 20). As a result, the end portions of the separators 2 and 3 are completely wound without being scattered.

Then, the end portions of the separators 2 and 3 are wound around by a fixing tape (not shown). the winding operation of the various sheets 2 to 5 is completed, and the battery element 1 is completed. The completed battery element 1 is detached from the core 13 by the detaching device. After the battery element 1 is detached, the core 13 is immersed in the turret 12.

After the separators 2 and 3 are cut off, the end portions of the separators 2 and 3 at the peeling position P2 described above are wound and the various sheets 2 to 5 at the winding position P1 are wound, As shown in Fig. In other words, the winding core 14 is rotated in the winding position P1 and the winding of the electrode sheets 4, 5 by the gripping mechanism 71 (clamps 71a, 71b) in the electrode sheet feeding mechanisms 31, By opening the grip, the winding of the various sheets 2 to 5 is started (see Fig. 20).

Thereafter, the above-described process is repeatedly performed, and the various cells 2 to 5 are alternately wound around the cores 13 and 14, whereby the cell elements 1 are sequentially produced.

As described in detail above, according to the present embodiment, every time the winding operation of one battery element 1 is carried out, the electrode sheets are supplied from the electrode sheet feeding mechanisms 31 and 41 to the cores 13 and 14 It is not necessary to carry out the step of feeding the electrode sheets 4, 5, and the like, so that the productivity can be improved.

The electrode sheets 4 and 5 to be wound next to the other winding core 14 in the state of being connected to the end portions 4e and 5e of the electrode sheets 4 and 5 wound on one winding core 13 Since the electrode sheets 4 and 5 are cut and fixed in the slit 14S of the core 14 with the leading ends 4f and 5f of the electrode sheets 4 and 5 being inserted into the core 14, The positional deviation of the leading ends 4f and 5f of the battery cells 1 and 5 is also less likely to occur and deterioration of the quality of the resulting battery element 1 can be suppressed.

In addition, since the step of winding and fixing the separators 2 and 3 to the cores 13 and 14 is not necessary, the amount of use of the separators 2 and 3 can be reduced and the cost can be reduced.

In addition, in the present embodiment, the plurality of cores 13 and 14 are moved to sequentially perform winding. In other words, the end portion of the separators 2 and 3 can be wound on one winding core 13 and the new winding can be started on the other winding core 14 at the same time. As a result, productivity can be improved as compared with a winding apparatus having only one winding.

In the present embodiment, the end portions 4e and 5e of the electrode sheets 4 and 5 for one element to be wound by the core 13 and the end portions 4e and 5e of the one element portion to be wound next by the core 14 A dotted line hole 150 is formed in a portion where the double-stick tape 100 positioned between the leading ends 4f and 5f of the respective electrode sheets 4 and 5 are adhered to each other. Thereby, when the electrode sheets 4 and 5 are cut at the dotted line hole 150 in the slit 14S of the core 14, no burrs or edges are formed in the cut portions, Or powder of the active material does not occur. As a result, it is possible to reduce the occurrence of a problem that the separator is damaged and short-circuited, or that the debris of the metal sheet, the powder of the active material, etc. is entrained in the battery element 1 and the quality of the obtained battery element 1 can be improved have.

In this embodiment, since the metal sheet portions of the electrode sheets 4 and 5 are previously cut and not cut in the slits 13S and 14S of the cores 13 and 14, It is possible to further reduce the occurrence of the problem that the powder or the like of the active material is entrained in the battery element 1.

By providing the support rollers 15A and 15B, the support rollers 15A and 15B can be moved from the support rollers 15A and 15B to the guide rollers 88a and 88b without depending on the rotation posture of the cores 13 and 14 located at the release position P2 The positions of the electrode sheets 4 and 5 and the separators 2 and 3 disposed thereon become stable. As a result, since the electrode sheets 4 and 5 are pulled out while being extended straight between the support rollers 15A and 15B and the guide rollers 88a and 88b, a proper load is applied to the dotted line hole 150 So that it can be cut properly and smoothly. The electrode sheets 4 and 5 and the separators 2 and 3 can be appropriately inserted into the slits 13S and 14S of the cores 13 and 14 located at the winding position P1.

Further, the present invention is not limited to the description of the above embodiment, and the following description is also applicable. Needless to say, other applications and modifications that are not illustrated in the following 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, a winding element of an electrolytic capacitor or the like may be produced.

(b) In the above-described embodiment, the cores 13 and 14 are made of corrugations having an outer shape of a rectangular shape (flat shape) in which the various sheets 2 to 5 are wound. The shape is not limited to this but may be, for example, a circular shape whose outer shape is a circle shape, an ellipse shape, a long circle shape, or the like.

(c) The materials of the separators 2 and 3 and the electrode sheets 4 and 5 are not limited to the above-described embodiments. For example, in the above embodiment, the separators 2 and 3 are formed of PP, but the separators 2 and 3 may be formed of other insulating materials.

(d) In the above embodiment, the winding section 11 is provided with two winding cores 13 and 14. However, the number of winding cores is not limited to this, and even if the winding section 11 is provided with three or more winding cores good.

(e) In the above embodiment, the chuck mechanism 13T (14T) of the core 13 ((14)) is attached to one of the pair of core pieces 13A and 13B ((14A and 14B) (Not shown) for driving the chuck member 13Ta ((14Ta)) and the chuck member 13Ta ((14Ta) (14Ba) of the other chuck member 13Ta (14Ta) and the other core piece 13B ((14B)) by moving in the direction of approaching the core pieces 13B (2 to 5).

The configuration of the chuck mechanism 13T (14T) as the fixing means is not limited to this. For example, a pair of the core pieces 13A and 13B may be displaced relative to each other so that the various sheets 2 to 5 can be sandwiched.

(f) In the above embodiment, the end portions 4e and 5e of the electrode sheets 4 and 5 for one element which are wound by the core 13 and the end portions 4e and 5e of the one element The dotted line hole 150 is formed in a portion where the double-stick tape 100 positioned between the leading ends 4f and 5f of the electrode sheets 4 and 5 are adhered to each other. The formation of the dotted line hole 150 is not limited to this. As shown in Fig. 21 (b), the protective tape 100 is attached and the dotted line hole 150 is formed thereon without cutting the electrode sheets 4 and 5 in advance . 21 (c), the protection tape 100 may be omitted, and the dotted line hole 150 may be directly formed in the electrode sheets 4, 5. [

(g) In the above-described embodiment, as a broken line formed on the electrode sheets 4, 5 (protective tape 100), a sheath penetrating in the thickness direction of the electrode sheets 4, cutin; Dotted line hole 150 in which a plurality of lines are intermittently arranged is adopted. The configuration of the broken line is not limited to this. For example, a broken line (dotted line hole) may be employed which is cut from both ends in the width direction of the electrode sheets 4 and 5 and extended only at one central portion in the width direction, and a non-penetrating half- Or may be formed as a broken line.

(h) The configuration of the electrode sheet feeding mechanisms 31 and 41 is not limited to the above embodiment. For example, in the above-described embodiment, the cutter attaching device 87 having the cutter mechanism 90 serving as the sheet cutting means, the holding mechanism 91 serving as the sheet holding means, and the tape attaching mechanism 92 serving as the tape attaching means However, the present invention is not limited to this, and at least one of the cutter mechanism 90, the gripping mechanism 91 and the tape splicing mechanism 92 may be provided independently.

(i) In the above-described embodiment, the separators 2 and 3 are cut off from the outside of the cores 13 and 14 by the separator cutter 16. The structure for cutting the separators 2 and 3 is not limited to the above embodiment. For example, the separators 2 and 3 may be cut inside the slits 13S and 14S by providing cutters on the cores 13 and 14. It is also possible to form the dotted holes and cut the separators 2 and 3 by the winding forces of the cores 13 and 14 similarly to the electrode sheets 4 and 5.

(j) In the above embodiment, the alignment mechanism 72 drives the elevation roller 75 based on the detection result of the detection sensor 83, and the protective tape 100 (100) attached to each of the electrode sheets 4, But the present invention is not limited to this. For example, based on the measurement value of the encoder provided in the alignment mechanism 72 itself, the dotted line hole forming position X2 of the dotted line hole cutter 82 is positioned relative to the dotted line hole cutter 82. However, The positions of the protective tape 100 may be aligned with respect to the dotted line hole cutter 82. [

In the above embodiment, the dotted line holes 150 formed in the electrode sheets 4 and 5 are formed in the slits 13S and 14 of the cores 13 and 14, respectively, based on the measured values of the encoders provided in the cores 13 and 14. [ 14S, but the present invention is not limited to this. For example, a sensor may be provided in the cores 13, 14, and the dotted line hole 150 may be positioned based on the detection result .

(k) In the above embodiment, the dotted line hole 150 is formed in both the positive electrode sheet 4 and the negative electrode sheet 5, If the dotted line hole 150 is formed on at least one side and the cut line 150 is cut, the productivity can be improved at least as compared with the conventional technique. Of course, it is preferable that the dotted line hole 150 is formed for both of them.

(1) In the above embodiment, the timing of forming the dotted line hole 150 with respect to both of the positive electrode sheet 4 and the negative electrode sheet 5 is the same (simultaneous) (see FIG. 13) The timings of both may be shifted.

(m) Although the support rollers 15A and 15B for fastening the various sheets 2 to 5 are provided in the turret 12 in the above embodiment, the support rollers 15A and 15B may be omitted .

(n) In the above embodiment, the positions where the leading ends 4f and 5f of the positive electrode sheets 4 and 5 are positioned are the same in the slits 13S and 14S of the cores 13 and 14, The present invention is not limited to this and the position where the leading end portion 4f of the positive electrode sheet 4 and the leading end portion 5f of the negative electrode sheet 5 are positioned may be different from each other.

One… Battery element, 2, 3 ... Separator, 4 ... Electrode sheet, 5 ... The negative electrode sheet, 4e, 5e ... The termination, 4f, 5f ... The beginning part, 10 ... Winding device, 11 ... 12, ... Turret, 13, 14 ... Reckoning, 13S, 14S ... Slit, 13T, 14T ... Chuck mechanism, 15A, 15B ... Support roller, 16 ... Separator cutter, 31 ... Electrode sheet feeding mechanism, 41 ... A negative electrode sheet supply mechanism, 51, 61 ... Separator supply mechanism, 71 ... A gripping mechanism, 71a, 71b ... Clamp, 82 ... Dotted hole cutter, 82a ... Upper blade, 82b ... The lower blade, 87 ... Cutting attachment device, 90 ... Cutter mechanism, 91 ... Gripping mechanism, 92 ... Tape attaching mechanism, 100 ... Protective tape, P1 ... The winding position, P2 ... Peel position.

Claims (4)

As a winding device for superimposing and winding {polymerization} windings of an electrode sheet coated with an active material {active material} and a belt-shaped separator made of an insulating material from a predetermined supply mechanism ,
A turret rotatably provided with its own central axis as a rotation axis,
A plurality of coils wound around the electrode sheet and the separator supplied from each of the supply mechanisms are arranged to be spaced apart from each other at a predetermined interval in the rotating direction of the turret, and,
A slit provided in each of the cores and capable of inserting the electrode sheet and the separator,
Fixing means capable of fixing the electrode sheet and the separator in the slit,
A broken line forming means provided in the supply mechanism of the electrode sheet and capable of forming a broken line (broken line) with respect to the electrode sheet,
A holding means provided in a supply mechanism of the electrode sheet and capable of grasping the electrode sheet,
After winding the electrode sheet and the separator supplied from each of the supply mechanisms by a predetermined length about a first winding in a first position in the plurality of winding directions, the turret is rotated, and the corresponding {first winding} Moving the first winding to the first position and moving the second winding to the first position different from the first winding;
The end portion of the electrode sheet wound by the first core and the end portion of the electrode sheet to be wound in the next {next time} by the second core, Forming a broken line with respect to a position where the broken line is formed;
Inserting the electrode sheet and the separator disposed from the first core located at the second position to each of the supply mechanisms with respect to the slit of the second core located at the first position;
A step of positioning the formation position of the broken line of the electrode sheet at a predetermined position in the slit of the second winding core by winding the electrode sheet and the separator by the first winding located at the second position,
A step of gripping the electrode sheet by the gripping means after the electrode sheet is positioned,
A step of cutting the electrode sheet at a position where the break line is formed by winding the electrode sheet and the separator with the first core in a state of holding the electrode sheet by the holding means;
Winding the end portion of the electrode sheet by winding the electrode sheet and the separator by the first core after the electrode sheet is cut off;
Fixing the electrode sheet and the separator to be wound next by the second winding core in the slit of the second winding core by the fixing means;
A step of cutting the separator arranged from the first core to the second core,
And a step of winding the end portion of the separator by the first core after the separator is cut off. The method according to claim 1,
And a protection tape attaching means for sticking (pasting) a protective tape to a region where the broken line is formed by the breaking line forming means in advance. 3. The method of claim 2,
The protective tape attaching means
Sheet cutting means for cutting the electrode sheet at a position to be a section of the electrode sheet wound by the core,
And an upstream-side grip portion capable of gripping the electrode sheet on the upstream side of the cutting means when the electrode sheet is cut by the sheet cutting means, and a downstream-side grip portion capable of gripping the electrode sheet on the downstream side of the cutting means, And after the sheet is cut, the sheet holding means is configured to move relative to each other in the direction of separating (separating) from each other along the sheet conveyance direction (conveying direction)
A protective tape is attached to both the front and back surfaces of the electrode sheet so as to connect the upstream side portion and the downstream side portion of the electrode sheet separated by the sheet holding means and the gap between the upstream side portion and the downstream side portion of the electrode sheet And a tape attaching means configured to adhere the bonding tape to each other at {gap}
The breaking line forming means
And said broken line is formed on a portion where said positive sense tape is adhered to each other. 4. The method according to any one of claims 1 to 3,
Wherein the electrode sheet and the separator disposed between the first winding and the second winding with respect to the rotating direction of the turret and extending from the first winding located at the second winding position to the supply mechanism are jammed Characterized in that it has a support roller.

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