JPH1197056A - Long body winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the physical relationship and the winding length of each electrode material, even when the error is generated in the same, in a device for forming a wound electrode body by interposingly winding a long negative and positive electrode materials. SOLUTION: In a take-up part for delivering the electrode materials 7, 9 to a winding shaft 15 side, a discontinuous part of an active material coating on the electrode materials 7, 9 is detected by the sensors 119, 121. The delivering lengths of the electrode materials 7, 9 from this discontinuous part are detected by the encoders 56, 89 mounted corresponding to the electrode materials 7, 9, respectively. The existence of the error is judged on the basis of the detection values of the encoders 56, 89, and a cutting position is adjusted by moving one of cutting devices 122a in a delivering direction of the electrode material. 9 shown by an arrow A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long body winding apparatus for forming a wound body by winding a long body such as an electrode material of a non-aqueous electrolyte secondary battery around a winding shaft.

[0002]

2. Description of the Related Art Conventionally, batteries, particularly batteries as mobile power sources, have been reduced in size, weight, and energy density. Then, as a battery capable of obtaining a high output and a high energy density, a positive electrode and a negative electrode formed by adhering an active substance to a strip-shaped current collector made of a metal foil are each formed of a microporous polypropylene film. 2. Description of the Related Art There is a battery that uses a wound body wound in a roll shape with a separator interposed therebetween as an electrode. In the positive electrode material and the negative electrode material, the coating of the active substance is
It is performed intermittently for each unit length forming one electrode. That is, in each electrode material, the active material is coated over a unit length, and there is a discontinuous portion of the active material coating between the next unit length.

[0003] In manufacturing a battery using such a wound body as an electrode, the wound body is manufactured by using a long body winding device and a long current collector as a winding shaft. It is wound. This long body winding device is configured to have four payout shafts and a winding portion. In this elongate body winding device, four feed shafts are provided with a raw material roll of a negative electrode material in which a negative electrode mixture is coated on both surfaces of a negative electrode current collector, and a positive electrode mixture on both surfaces of a positive electrode current collector. The raw material roll of the positive electrode material coated with is coated with the raw material rolls of the first and second separators, each of which is made of a microporous polypropylene film.

[0004] A winding shaft is provided in the winding section.
The winding unit rotates the winding shaft in a fixed direction and at a constant speed, and winds each material fed from each feeding shaft around the winding shaft to produce a wound electrode body. That is, the first separator, the positive electrode material, the second separator, and the negative electrode material are wound over a predetermined amount around a winding shaft that is driven to rotate in a state of being sequentially stacked, thereby forming a wound electrode body. I do.

In the winding section, the positive electrode material and the negative electrode material are fed out to the winding shaft side by a unit length by a feeding mechanism which feeds the respective electrode materials to the winding shaft side, and the winding is performed. Wound around the spindle.

[0006]

By the way, in the winding portion of the above-described long body winding device, the positive electrode material and the negative electrode material sent to the winding shaft side are wound around the winding shaft. The electrode is formed, and the relative position of each electrode material in the formed electrode and the winding length of each electrode material are determined by the operating length of the feeding mechanism for feeding each electrode material toward the winding shaft. Just being controlled.

Therefore, when a driving source such as a motor for rotating the take-up shaft is stopped, a so-called overrun occurs, or a portion sandwiching the electrode material in the feeding mechanism slides with the electrode material, or the take-up takes place. If the electrode material slides with respect to the axis, an error occurs in the positional relationship between the electrode materials and the winding length of each electrode material.

An electrode wound with such an error has an accidental factor such as an internal short circuit when a battery is formed using this electrode. Yes, and cannot be sent to the next process.

Accordingly, the present invention has been proposed in view of the above-mentioned circumstances, and has been proposed in consideration of the above-mentioned circumstances. Two sheets unwound from a raw roll like an electrode winding apparatus for manufacturing a non-aqueous electrolyte secondary battery are provided. It is a long body winding device that forms a winding body by stacking long bodies and winding them up by a winding shaft, depending on the mutual positional relationship of each long body and the winding length of each long body. An object of the present invention is to provide a long body winding device capable of correcting such an error even when an error occurs.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a first and a second belt which are respectively formed in a belt shape, wound around respective material rolls, and unreeled from these material rolls. Each of the long bodies is led to a winding shaft, and the winding shafts are rotated to overlap each long body, and the winding shaft is wound and wound by a unit length to form a winding body. In the body winding device, first initial position detecting means for detecting a break position of a unit length in the first elongated body sent out toward the winding shaft, and the first initial position sent out toward the winding shaft. First length detecting means for detecting the length of the long body, and second initial position detecting means for detecting a break position of the unit length in the second long body fed toward the winding shaft And detecting a length of the second elongated body sent out toward the winding shaft. Detection means, determination means to which detection results are sent from each of the initial position detection means and each of the length detection means and to compare these detection results, and a first elongate body which has been wound around the winding shaft. First cutting means for cutting the end portion;
The end portion of the second elongate body which is movably disposed along the feeding direction of the second elongate body toward the winding shaft and which has been wound around the winding shaft is cut. And a second cutting means.

[0011] The discriminating means compares the length of each of the long bodies sent out toward the winding shaft from the break position of the unit length, and based on the comparison result, the second cutting operation. The cutting means is moved along the feeding direction of the second elongate body toward the winding axis to adjust the cutting position of the second elongate body.

Therefore, in this long body winding device, it is possible to form a good wound body in which the lengths of the long bodies are uniform.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a long body winding device according to the present invention is configured as a device for producing a wound electrode body of a nonaqueous electrolyte secondary battery.

A non-aqueous electrolyte secondary battery uses a lithium ion-doped and undoped substance such as lithium, a lithium ion alloy or a carbon material as a negative electrode, and uses a lithium as a positive electrode. This is a secondary battery using a lithium composite oxide such as a cobalt composite oxide.
This nonaqueous electrolyte secondary battery is a secondary battery having a high battery voltage, a high energy density, and excellent cycle characteristics.

The electrode body of the non-aqueous electrolyte secondary battery is a strip-shaped electrode current collector in which a negative electrode mixture made of KH carbon or the like, which is a carbon material capable of doping and undoping lithium, is a first long body. A positive electrode material applied to the body, and a negative electrode material as a second long body in which a positive electrode material mixture such as LiCoO2 which is a composite oxide of lithium and a transition metal is applied to a strip-shaped electrode current collector. Is wound around a winding shaft a plurality of times via a separator made of a microporous polypropylene film to form a wound electrode body. This wound electrode body is manufactured in a wound body shape using a long body winding device. In the positive electrode material and the negative electrode material,
As shown in FIG. 3, the active material coatings 7a, 9a
Are intermittently performed for each unit length forming one electrode. That is, in each of the electrode materials 7 and 9, the active material coatings 7a and 9a are formed over the unit length, and between the next unit length and the active material coating which is a unit length dividing position. There are discontinuous parts 7b and 9b.

[0016] As shown in FIG. 1, a long body winding apparatus according to the present invention for producing such a wound electrode body has a support plate 1
And a first to a fourth feeding shafts 2, 3, 4, and 5 and a winding portion 6 on the surface portion of the support plate portion 1.

The first feeding shaft 2 has a positive electrode material 7
The positive electrode material reel 8 around which the raw material roll is wound is mounted. A negative electrode material reel 10 around which a raw roll of the negative electrode material 9 is wound is mounted on the second feeding shaft 3. In addition, a first separator reel 12 around which a raw roll of the first separator 11 is wound is mounted on the third feeding shaft 4. Then, a second separator reel 14 around which a raw roll of the second separator 13 is wound is mounted on the fourth feeding shaft 5.

The winding section 6 is provided with a winding shaft 15. The winding unit 6 drives the winding shaft 15 to rotate in a fixed direction and at a fixed speed, and the feeding shafts 2, 3, 4, 5
The materials 7, 9, 11, and 13 that have been further unwound are taken up by a winding shaft 1.
5 to form a wound electrode body 16.
That is, the first separator 11, the positive electrode material 7, the second separator 13, and the negative electrode material 9 are wound over a predetermined amount around the rotating shaft 15 that is driven in a stacked state. As shown in FIG. 4, the wound electrode body 16 is formed.

In the vicinity of the first pay-out shaft 2, a fifth pay-out shaft 18 on which a positive electrode material reel 17 around which a raw material roll of a replacement positive electrode material 7 is wound is mounted. Have been. The first pay-out shaft 2 and the fifth pay-out shaft 18 are connected to the mounted positive electrode material reel 8,
Each time the feeding of the positive electrode material 7 wound around 17 is completed, it is replaced and used alternately. Further, in the vicinity of the second feeding shaft 3, a sixth feeding shaft 20 on which a negative electrode material reel 19 around which a raw roll of the replacement negative electrode material 9 is wound is mounted. . The second pay-out shaft 3 and the sixth pay-out shaft 20 are replaced and used alternately each time the feed-out of the negative electrode material 9 wound around the mounted negative electrode material reels 10 and 19 is completed. .

In this long body winding device, when the positive electrode material 7 is unwound from the positive electrode material reel 8, it is guided by a guide roller 21 rotatably disposed on the surface of the support plate 1. And the reel edge sensor 22
Through the guide rollers 23 and 24 to the roller portion 26 of the tension arm 25. The reel edge sensor 22 detects the edge position of the positive electrode material 7 and sends the detection result to the control circuit. The control circuit moves the first payout shaft 2 in the axial direction together with the positive electrode material reel 8 via a ball screw (not shown) based on the detection result sent from the reel portion edge sensor 22, and outputs the positive electrode material. Control is performed so that the edge of No. 7 is at a predetermined position. The tension arm 25 generates a predetermined tension on the positive electrode material 7 while guiding the running of the positive electrode material 7 by the roller portion 26. Roller part 2 of tension arm 25
The positive electrode material 7 passed through 6 is provided with a plurality of guide rollers 27,
28, 29, 30, 31 and the edge controller 3
Reaches 5.

The edge controller 35 has a pair of roller bodies 32, 33 and an edge sensor 34. The pair of roller bodies 32 and 33 are rotatable about a pair of rotation axes perpendicular to the edge of the positive electrode material 7, that is, parallel to each other and perpendicular to the running direction of the positive electrode material 7. It is supported, and both sides of the positive electrode material 7 are cooperatively sandwiched by the respective outer peripheral surfaces. The rollers 32 and 33 are made of, for example, a material such as rubber, and are rotated by the positive electrode material 7 when the positive electrode material 7 is fed out. The edge sensor 34 is disposed in the vicinity of each of the roller bodies 32 and 33 and at a position where the positive electrode material 7 after passing between the roller bodies 32 and 33 passes, and the position of the edge of the positive electrode material 7 Is detected. This edge sensor 3
Reference numeral 4 denotes a line sensor which detects a position of an edge of the positive electrode material 7 in a direction perpendicular to the edge.

The pair of roller bodies 32 and 33 have their outer peripheral surfaces pressed against each other. That is, these roller bodies 3
The rotation shaft supporting one of the rotation shafts 2 and 33 is movably supported in the direction of contact and separation with respect to the rotation shaft supporting the other, and is operated by an air cylinder (not shown) attached to the support plate portion 1. , Are biased in a direction approaching a rotation shaft supporting the other roller body.

The edge controller 35 has a servo motor (not shown) for moving the roller bodies 32 and 33 in the direction of their respective rotation axes. This servo motor is located on the back side of the support plate 1. The drive of this servomotor is controlled by a control circuit based on the detection result of the edge sensor 34. That is, the control circuit corrects the position of the edge of the positive electrode material 7 by controlling the driving of the servomotor based on the detection result of the edge sensor 34.

In the edge controller 35,
Since the positive electrode material 7 is directly sandwiched between the rollers 32 and 33 and moved in the direction perpendicular to the edge, the edge position of the positive electrode material 7 can be controlled and corrected even if the speed of the positive electrode material 7 changes. Is performed reliably. In addition, since the roller members 32, 33 and the portions of the roller members 32, 33 that are operated to move in the direction of the rotation axis together with the roller members 32, 33 are lightweight, quick control of the edge position of the positive electrode material 7 is achieved. Correction can be made.

The positive electrode material 7 that has passed through the edge controller 35 is guided by a plurality of guide rollers 36, 37, 38, 39, and 40 rotatably disposed on the surface of the support plate portion 1 to form a positive electrode lead. The welding part 42 is reached. In the positive electrode lead welding portion 42, the positive electrode material 7 includes:
The positive electrode lead connected to the positive electrode output terminal of the battery is welded by the ultrasonic welder 41. Then, the positive electrode material 7 is further sandwiched between the nip rolls 43 and sent.
A predetermined tension is generated by passing through the tensioner 45 via the guide rollers 43 and 44, and further guided by the plurality of guide rollers 46, 47, 48, 49 and 50, passing through the tensioner 51 and the plurality of guide rollers 52 and 53. ,
The winding shaft 1 of the winding unit 6 passes through the edge sensor 54 and the edge sensor 55.
5 is guided by the rotor part of the first encoder 56 serving as first length detecting means for detecting the length of the positive electrode material 7 sent out toward the winding part 6. The first encoder 56 can detect the length of the positive electrode material 7 passing through the rotor section via the rotor section.

The nip roll 43 is not rotated without following the running of the positive electrode material 7 without resistance.
Have different tensions. That is, the tension of the positive electrode material 7 is determined by the tension arm 25 and the like before the nip roll 43 before passing through the nip roll 43, and is determined by the tensioners 45 and 51 after the nip roll 43 after passing through the nip roll 43.

When the negative electrode material 9 is unwound from the negative electrode material reel 10, it is guided by a guide roller 58 rotatably disposed on the surface of the support plate 1, and a reel edge sensor 59 is provided. Through the guide rollers 60 and 61, the roller portion 6 of the tension arm 62.
Reaches 3. The reel edge sensor 59 detects the edge position of the negative electrode material 9 and sends the detection result to the control circuit. The control circuit moves the second feeding shaft 3 in the axial direction together with the negative electrode material reel 8 via a ball screw (not shown) based on the detection result sent from the reel portion edge sensor 59 to thereby control the negative electrode material. Control is performed so that the edge of No. 9 is at a predetermined position. Tension arm 62
Generates a predetermined tension on the negative electrode material 9 while guiding the running of the negative electrode material 9 by the roller portion 63. The negative electrode material 9 having passed through the roller portion 63 of the tension arm 62 is provided with a plurality of guide rollers 64, 65, 66, 6.
After reaching 7, 68, it reaches the edge controller 35.

This edge controller 35 is similar to the one used for the above-described positive electrode material 7,
It has a pair of roller bodies 32 and 33 and an edge sensor 34 serving as edge position detecting means. That is, the control circuit corrects the position of the edge of the negative electrode material 9 based on the detection result by the edge sensor 34. In the edge controller 35 as well, the negative electrode material 9
Is moved directly in the direction perpendicular to the edge by being directly sandwiched between the respective roller bodies 32 and 33. Therefore, even if the speed of the negative electrode material 9 changes, the edge position of the negative electrode material 9 can be reliably controlled and corrected. Will be In addition, each roller body 32,3
3 and the portions of the roller bodies 32 and 33 that are moved in the rotation axis direction together with the roller bodies 32 and 33 are lightweight, so that the edge position of the negative electrode material 9 can be quickly controlled and corrected.

The negative electrode material 9 having passed through the edge controller 35 is guided by a plurality of guide rollers 69, 70, 71, 72, 73 rotatably disposed on the surface of the support plate portion 1 to form a negative electrode lead. The weld 75 is reached. In the negative electrode lead welding portion 75, the negative electrode material 9 includes
The ultrasonic welder 74 welds the negative electrode lead connected to the negative electrode output terminal of the battery. Then, the negative electrode material 9 is further fed while being sandwiched by the nip rolls 77,
A predetermined tension is generated by passing through the guide roller 80 and the tensioner 81 via the guide roller 78 and the tensioner 79, and furthermore, a plurality of guide rollers 82, 83, 8
4, the length of the negative electrode material 9 sent out toward the winding shaft 15 of the winding section 6 through the tensioner 85, the plurality of guide rollers 86, 87, 88 and the edge sensor 55 is detected. The second encoder 89 is guided by a rotor of a second encoder 89 serving as a second length detecting means, and reaches the winding unit 6. The second encoder 89 can detect the length of the negative electrode material 9 passing through the rotor portion via the rotor portion.

The nip roll 77 does not rotate without following the running of the negative electrode material 9 without resistance.
Have different tensions. That is, the tension of the negative electrode material 9 is determined by the tension arm 62 and the like before the nip roll 77 before passing through the nip roll 77, and the tensioners 79, 81, and 8 after the nip roll 77 after passing through the nip roll 77.
5 and so on.

When the first separator 11 is unreeled from the first separator reel 12, the first separator 11 passes through a guide roller 91 and an edge sensor 92 which are rotatably disposed on the surface of the support plate 1 and guide rollers 93. And tensioner 9
4, a predetermined tension is generated. The tension is further guided by a plurality of guide rollers 95, 96, and 97, and is guided by the guide rollers 99 and 100 via the edge sensor 98 to reach the winding unit 6.

When the second separator 13 is fed out from the second separator reel 14, the second separator 13 passes through a guide roller 101 and an edge sensor 102 which are rotatably disposed on the surface of the support plate 1, and guides the second separator 13 through the edge sensor 102. Roller 103, 1
04 and a tensioner 105, a predetermined tension is generated, and a plurality of guide rollers 106, 107,
Edge sensor 110 guided by
, And is guided by the guide rollers 111, 112, and 113 to reach the winding unit 6.

As shown in FIG. 2, a winding shaft 15 is rotatably arranged in the winding section 6. This winding shaft 15
Is rotated by a winding motor 125 in a fixed direction and at a fixed speed. Each of the materials 7, 9, 1 which are unreeled from the unwinding shafts 2, 3, 4, 5 and reach the winding part 6
1 and 13 are wound around a winding shaft 15 so that FIG.
The wound electrode body 16 is configured as shown in FIG.

The winding section 6 is provided with a positive-side feeding mechanism 57. This positive electrode side delivery mechanism 57
Is configured to be capable of holding the positive electrode material 7 and moving in the direction of contact and separation with respect to the winding shaft 15. The operation of the positive electrode side delivery mechanism 57 is controlled by a control circuit based on a detection signal of a first sensor 119 provided in the winding section 6. The first sensor 119 includes the winding shaft 1
This serves as first initial position detecting means for detecting a discontinuous portion 7b of the coating 7a of the active substance in the positive electrode material 7 sent out toward 5. That is, as shown in FIG. 3, the first sensor 119 includes a coating start portion 7 after the discontinuous portion 7 b of the positive electrode mixture in the positive electrode material 7.
By detecting c, it is possible to detect one unit length of the positive electrode material 7 for forming one wound electrode body 16. In the winding section 6, the positive electrode material 7 is sandwiched by the positive-side feed-out mechanism 57, and the positive-side feed-out mechanism 57 is moved to the take-up shaft 15 side. Is sent out for one unit length.

The winding section 6 is provided with a negative-side feeding mechanism 90. The negative-side feed-out mechanism 90 is configured to be capable of holding the negative electrode material 9 and moving in the direction of contact and separation with respect to the winding shaft 15. The operation of the negative-side feeding mechanism 90 is controlled by a control circuit based on the detection signal of the second sensor 121 provided in the winding section 6. The second sensor 121 serves as a second initial position detecting means for detecting a discontinuous portion 9 b of the coating 9 a of the active material in the negative electrode material 9 sent out toward the winding shaft 15. That is, as shown in FIG. 3, the second sensor 121 detects the application start portion 9 c after the discontinuous portion 9 b of the negative electrode mixture in the negative electrode material 9, thereby forming one wound electrode body 16. Can be detected for one unit length of the negative electrode material 9 for constituting the above. Then, in the winding section 6, the negative electrode material 9 is sandwiched by the negative-side feeding mechanism 90, and the negative-side feeding mechanism 90 is moved to the winding shaft 15 side. Is sent out for one unit length.

In this long body winding device,
Discrimination means for performing signal processing by receiving output signals from encoders provided in the first and second encoders 56 and 89, the first sensors 119 and 121, and the winding motor 125 for driving the winding shaft 15. Is provided. This control circuit includes first and second sensors 119,
The application starting portions 7c and 9c of the two electrode materials 7 and 9 by 121
Is detected, the first and second encoders 56 and 89
Are reset to 0. Then, the count value of the first encoder 56 is constantly monitored, and the length of each electrode material 7 sent to the winding shaft 15 is detected based on the count value.

The control circuit includes the first encoder 5
When the length of each electrode material 7 sent to the take-up shaft 15 detected based on the count value of the motor 6 reaches a predetermined length, the motor 1
25 is stopped. At this time, the control circuit compares the feed amounts of the electrode materials 7 and 9 to the winding shaft 15 based on the count value of the second encoder 89. The control circuit compares the feed amount of the negative electrode material 9 with respect to the feed amount of the positive electrode material 7, and applies the active material coatings 7 a and 9 a on the positive and negative electrode materials 7 and 9 as shown in FIG. The position shift amount Δ between the start sections 7c and 9c is detected.

As described above, the first separator 11, the positive electrode material 7, the second separator 1
3 and the negative electrode material 9 are sequentially stacked, and the winding shaft 15 is driven to rotate to be wound.
Then, the positive electrode material 7 is separated by the positive cutter 120.
The negative electrode material 9 is cut by the negative cutter 122.

The negative cutter 122 includes a support member 122a.
As shown by an arrow A in FIG. 2, along the feeding direction of the negative electrode material 9 toward the winding shaft 15,
It is arranged so that it can be moved. Such a moving operation of the negative-side cutter 122 is performed under the control of a control circuit by a plunger 122b attached to the support member 122a. That is, the control circuit calculates the positional deviation Δ between the coating start portions 7c, 9c of the active material coatings 7a, 9a on the positive and negative electrode materials 7, 9 wound on the winding shaft 15.
Is operated to move the negative-side cutter 122 according to. By moving the negative-side cutter 122 in this manner, the two electrode materials 7, 9 are cut at predetermined cutting positions 7d, 9d, respectively, as shown in FIG.

After the two electrode materials 7, 9 are cut, the separators 11, 13 are also cut. Furthermore, as shown in FIG. 1, the unwinding tape 115 is attached to the outer peripheral surface of the wound body to prevent unwinding,
The wound electrode body 16 is completed. This unwrapping tape 11
5 is wound in a roll shape and is rotatably supported by a support shaft 114 provided on the support plate portion 1. And
The unwinding tape 115 is unwound from a roll and guided by guide rollers 116 and 117.
It is sent to the winding unit 6.

When each of the separators 11 and 13 is cut, the guide roller 12 closest to the take-up shaft 15 is cut.
The leading ends of the separators 11 and 13 after cutting are nipped by the guide rollers 123 and 124. Then, the winding shaft 15 is operated to move in the axial direction and is extracted from the center of the wound electrode body 16,
The wound electrode and the like 16 are detached from the winding shaft 15 and mounted on a transport device 118 as shown in FIG. The transport device 118 carries out the wound electrode body 16 from the vicinity of the winding section 6 to the outside of the long body winding device.

The winding shaft 15 has a slit which is open toward the tip. After one wound electrode body 16 is completed and the wound electrode body 16 is removed from the winding shaft 15,
When the winding shaft 15 is moved in the axial direction and returned, the leading ends of the separators 11 and 13 sandwiched by the guide rollers 123 and 124 are inserted into the slit. By inserting the leading end portion of each of the separators 11 and 13 into the slit of the winding shaft 15 in this manner, each material constituting the next wound electrode body 16 can be wound.

In the above-described elongate body winding device, the pattern of the surface of the two electrode materials 7, 9, ie, the space between the discontinuous portions 7b, 9b of the active material coating, etc., and the winding shaft It is assumed that the delivery amounts toward the reference numeral 15 are substantially equal to each other. here,
If the surface patterns and the feed amounts of these two electrode materials 7 and 9 are not equal to each other, the motor 125 is rotated by a predetermined amount by monitoring the count value of the first encoder 56 and then the second encoder 89 is rotated. When the count value of the second encoder 89 has reached a predetermined value, that is, when the cutting position 9d has passed the position of the negative cutter 122, the motor 125 is stopped. This makes it possible to avoid complicated control. When the motor 125 is stopped, the negative electrode material 9 is cut by moving the negative electrode cutter 122 by an amount corresponding to the overrun, and the negative electrode material 9 can be cut at an accurate cutting position 9d. .

That is, the long body winding device according to the present invention can be used not only for manufacturing the above-mentioned wound electrode body but also for manufacturing various wound bodies.

[0045]

As described above, in the long body winding apparatus according to the present invention, it is possible to form a good wound body in which the lengths of the long bodies are uniform. That is, the present invention relates to an electrode winding apparatus for producing a non-aqueous electrolyte secondary battery, in which two long bodies unwound from a raw roll are stacked and wound by a winding shaft. Is a long body winding device that forms such that even if an error occurs in the positional relationship between the long bodies and the winding length of each long body, such an error can be corrected. It is possible to provide an elongated body winding device that has been made.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a long body winding device according to the present invention.

FIG. 2 is a front view showing a configuration of a winding shaft of the long body winding device.

FIG. 3 is a perspective view showing a configuration of an electrode material which is a material of a wound electrode body manufactured by the long body winding device.

FIG. 4 is a perspective view showing a configuration of a wound electrode body manufactured by the long body winding device.

FIG. 5 is a plan view showing a configuration of a central portion of a wound electrode body manufactured by the long body winding device.

[Explanation of symbols]

7 positive electrode material, 9 negative electrode material, 7a, 9a coating, 7b, 9b discontinuous portion, 7c, 9c coating start portion, 15 winding shaft, 56 first encoder, 89
Second encoder, 119, 121 sensor

Claims (2)

[Claims] 1. A first and a second elongate body formed in a strip shape, wound on each material roll, and unreeled from these material rolls are respectively guided to a winding shaft, and the winding shaft is rotated. In a long body winding device that forms a winding body by operating each of the long bodies and stacking and winding each unit length by the winding shaft, the winding body is fed toward the winding shaft. First initial position detecting means for detecting a break position of the unit length in the first elongate body, and first detecting means for detecting the length of the first elongate body sent out toward the winding shaft. Length detecting means, second initial position detecting means for detecting a break position of a unit length in the second elongated body sent out toward the winding shaft, and sent out toward the winding shaft. Second length detecting means for detecting the length of the second elongated body, and each of the initial positions A detection unit that receives detection results from the unwinding unit and the length detection units, and compares the detection results; and a second unit that cuts a terminal portion of the first elongated body that has been wound around the winding shaft. A second cutting means arranged so as to be movable along a feed direction of the second elongated body toward the winding shaft, and the winding of the second elongated body being completed around the winding shaft. Second cutting means for cutting the end portion of the elongated body, wherein the determining means is configured to measure the length of each of the elongated bodies sent out toward the winding shaft from a break position of each unit length. The second cutting means is moved along the feeding direction of the second elongated body toward the winding shaft on the basis of the comparison result, and the second cutting means is moved. An elongated body winding device for adjusting a cutting position of an elongated body. 2. The method according to claim 1, wherein the determining unit is configured to move the first elongated body toward the winding shaft via the first length detecting unit while the second elongated body is being sent out toward the winding shaft. The continuous body winding device according to claim 1, wherein the monitoring of the length of the continuous body is continued, and the delivery of each continuous body is stopped based on a result of the monitoring.