JPH11219718A - Method and apparatus for manufacturing battery electrode body - Google Patents

Abstract

(57) [Problem] To provide a method and an apparatus for manufacturing a battery electrode body in which a wound object such as a separator does not substantially remain in a center hole. It is an object of the present invention to provide a battery electrode assembly manufactured by a novel and novel manufacturing method and manufacturing apparatus, and a battery incorporating such a battery electrode assembly. SOLUTION: A part of an object to be wound is positioned in a gap portion which the winding core has along a rotation axis direction thereof so as not to penetrate the winding core in a direction orthogonal to the rotation axis of the winding core. Is wound, the wound material is wound on a winding core, and a method for manufacturing an electrode body for a battery, in which a winding core having a void portion along a rotation axis direction and the void, In the part, by means of a device for manufacturing an electrode body for a battery comprising: means for positioning an object to be wound so as not to penetrate the core in a direction perpendicular to the core rotation axis direction, and means for rotating the core. Solves the above problem by providing a battery electrode body manufactured by such a manufacturing method or manufacturing apparatus, and a battery incorporating such a battery electrode body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a battery electrode body in which a separator and an electrode are wound using a core, and more particularly, to a battery electrode obtained by removing the core. The present invention relates to a method and an apparatus for manufacturing a battery electrode body in which substantially no wound material such as a separator remains in a center hole of the body.

[0002]

2. Description of the Related Art In recent years, demand for high-performance batteries has been increasing with the portable use of video equipment, audio equipment, communication equipment, computers, and the like. Of lithium ion secondary batteries of various sizes and forms have already been put to practical use.

As shown in FIG. 18, an electrode body of a lithium ion secondary battery is generally formed by laminating two separators 3 and 3 and a positive electrode 4 and a negative electrode 5 in a gap 2 of a winding core 1. It is manufactured by sandwiching and winding by rotating the winding core 1, and then extracting the winding core 1. The separators 3 and 3, which are the wound objects, are inserted into the gap 2 of the winding core 1. As shown in FIG. 19, the separator 3 is wound in the center hole 7 of the electrode body 6 from which the winding core 1 has been drawn, across the center hole 7, as shown in FIG. There was a disadvantage that it would remain. As shown in FIG. 20, after inserting the electrode body 6 into the negative electrode can 8, the center hole 7
Is used as an insertion hole of a welding rod 10 for welding the welding rod 10. The presence of the separator 3 in the center hole 7 in the shape of an “の” prevents the insertion of the welding rod 10 and causes a welding defect. Accordingly, it is not preferable.

Conventionally, in order to eliminate this inconvenience, prior to the insertion of the welding rod 10, a reforming pin heated to a relatively high temperature is inserted into the center hole 7 to remove the separator 3 existing at the center of the center hole 7. The center hole 7 is pressed against the inner wall of the center hole to reform the center hole 7. However, such a method not only increases the number of steps for reforming, but also causes unexpected damage to the electrode body due to the use of high temperature, and the center hole that should have been reformed again when the welding rod is inserted. There is a problem that the product yield is deteriorated due to the return to the original shape.

Further, as shown in JP-A-8-315830, the cross-sectional shape of the end of the core is made the same as the center hole, and when the core is removed, the center hole is formed by the end of the core. There have been proposals to solve the problem of the separator remaining in the shape of a "" in the center hole by molding. However, even with this method, the separator remaining in the center hole is eventually removed. This is done after the fact and does not fundamentally solve the problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve these drawbacks of the prior art, and fundamentally revises the conventional idea of post-treating the separator remaining in the center hole. In the first place, an object of the present invention is to provide a method and an apparatus for manufacturing a battery electrode body in which a wound object such as a separator does not substantially remain in a center hole. It is an object of the present invention to provide a battery electrode body manufactured by a manufacturing method and a manufacturing apparatus, and a battery incorporating such a battery electrode body.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have conducted research on a method and apparatus for manufacturing an electrode body for a battery. Instead of sandwiching the tip of the separator or the like through the void of the core and sandwiching the core, the part of the material to be wound is sandwiched between the cores to such an extent that the void does not penetrate the core. By rotating, it was found that an electrode body in which substantially no material to be wound such as a separator remains in the center hole without any forming after the winding was completed, and the present invention was completed.

That is, according to the present invention, a part of the material to be wound is
The wound core is rotated by rotating the core so that the core is positioned so as not to penetrate the core in a direction orthogonal to the axis of rotation of the core, in a gap portion along the direction of the axis of rotation of the core. By a method of manufacturing an electrode body for a battery that is wound up to produce an electrode body, and a winding core having a gap along the rotation axis direction, and in the gap, in a direction orthogonal to the winding axis rotation axis direction. It is manufactured by an apparatus for manufacturing a battery electrode assembly including means for positioning a wound object so as not to penetrate a winding core, and means for rotating the winding core, and further manufactured by such a manufacturing method or manufacturing apparatus. An object of the present invention is to solve the above-mentioned problem by providing a battery electrode assembly and a battery incorporating such a battery electrode assembly.

In the present invention, it is important that the material to be wound is positioned in the gap so as not to penetrate the core in a direction perpendicular to the axis of rotation of the core. Here, the extent that the core does not penetrate in the direction orthogonal to the core rotation axis means that the tip of the object to be wound positioned in the gap existing along the rotation axis of the core is on the opposite side of the core. It does not come out, and as long as the tip of the wound object does not come out on the opposite side of the winding core, the position of the tip of the wound object in the gap is not particularly limited. However, usually, from the viewpoint of ensuring the winding and leaving substantially no material to be wound in the center hole, the material to be wound is about １ ／ to ／ of the core diameter of the core. It is desirable to be located in the core gap, and more preferably, it is 1/1 of the core diameter of the winding core.
It is preferable that the object to be wound is located in the gap portion by about 3 to 2/3.

[0010] The phrase "the object to be wound is located in the gap" means that the object to be wound is present in the gap. As long as the object to be wound is present in the gap, the object to be wound is located in the gap. Any means may be used for the positioning. For example, the material to be wound is placed in front of the core void portion, and the insertion member is relatively moved toward the core from the side opposite to the core,
By inserting the insertion member into the core void,
The wound object may be located in the gap,
After the wound material is positioned by penetrating the winding core, the wound material is moved into the winding core gap portion so as not to penetrate the winding core by moving the winding core or pulling back the wound material. May be located. Furthermore, when the core is formed by moving the core constituting member by using a core composed of a plurality of members, a part of the object to be wound is sandwiched so that the wound object is wound. You may make it locate in a core gap part.

[0011] The shape of the insertion member may be any shape as long as it can enter the core gap and insert a part of the material to be wound into the gap. A thin plate, a thin part only inserted into the gap, a long one composed only of the part inserted into the gap, a thread-shaped one with a particularly thin tip Various forms are possible. It is preferable that the insertion member is disposed parallel to the core rotation axis and is inserted into the gap parallel to the core rotation axis.

The insertion depth of the insertion member into the gap is not particularly limited as long as the insertion end of the article to be wound positioned in the core gap by the insertion member does not penetrate the core. About the same as the insertion tip of the object to be wound, ie, about 1/4 to 3/4 of the core diameter of the winding core,
It is preferable to insert the insertion member into the core void portion, and it is more preferable to insert the insertion member to about １ ／ to ／ of the core diameter.

As described above, according to the present invention, it is not necessary for the tip of the material to be wound positioned in the core gap to penetrate through the core and protrude to the opposite side of the core. , Or may have a bottom and penetrate the core in a direction perpendicular to the core rotation axis. Also, the core void portion,
When the core is composed of a single member, the core may be present as a groove provided in the core, and the core may be 2 or 3
When configured from the above members, as a groove-shaped portion formed between the opposing surfaces of the core constituting members,
The core component may be present when the core is configured. The void may be present at the end of the core or inside the core.

When the winding core rotates in a state where a part of the material to be wound is located in the void space of the core, the space rotates with the part of the material to be wound positioned inside. The object to be wound is wound up on the winding core starting from the contact point between the inner wall edge and the object to be wound. In order to prevent a part of the material to be wound positioned in the gap portion from accidentally falling out with the rotation of the winding core, the winding material must be wound at least one time on the winding core. It is preferable to take measures to prevent the wound material from falling out of the gap. Until the wound object winds at least one time on the winding core, the wound object to be wound winds the winding core one time and covers the wound object that has become the starting point of winding. In such a state, the object to be wound is tightened by the tension applied to itself, and the object to be wound will no longer fall out of the gap. The time to take measures to prevent the wound material from falling out of the gap may be any time until the winding core starts rotating, even before the wound material is positioned in the gap. It may be later. In addition, the time to cancel the means for preventing the wound object from falling out of the gap portion is no longer necessary, as long as the wound object no longer slips out of the core gap portion, and the safety factor, Needless to say, it can be appropriately set according to the properties of the material to be wound and the core, the winding speed, and the like.

Any means may be used to prevent the material to be wound from coming out of the gap. However, in a state where a part of the material to be wound is located in the core gap, the gap may be removed. It is possible to use a monoway roller that rotates in only one direction and that contacts the winding core with the wound object interposed therebetween on the upstream side of the wound object located in the section. The monoway roller sends out the material to be wound only in one direction with the rotation of the winding core, and prevents the material to be wound from coming out of the core void. Or,
On the upstream side of the winding core, by giving the material to be wound a slack having a length corresponding to at least one winding of the winding core,
It is possible to prevent the material to be wound from coming out of the core gap. Further, the wound object may be sandwiched between the core components to prevent the wound object from falling out of the core void. In addition, a plurality of means for preventing such escape can be used in combination. Here, the upstream side of the wound object is a side near the supply source of the wound object flowing from the supply source toward the winding position.

[0016] The core is removed after the winding is completed. The extraction may be performed by pulling out the entire core in one direction, and when the core is composed of two or more members, the core may be extracted in one direction or two opposing directions. .

In the present invention, the material to be wound means a material to be wound when constituting a battery electrode body. In the case of a lithium ion secondary battery or a nickel / cadmium secondary battery, , A separator, a positive electrode, a negative electrode and the like. These are usually thin strips, which are fed to the winding position in a stacked state. Since the length of the wound positive electrode and negative electrode is usually shorter than that of the separator, the leading portion of the material to be wound supplied to the winding position is composed of only the separator. Therefore, a part of the material to be wound located in the void of the core is usually a separator, but a part of the material to be wound located in the void of the core is limited to the separator. It is not limited to this and may be anything as long as it constitutes the leading part of the material to be wound. In the following description, a lithium ion secondary battery or a nickel / cadmium secondary battery will be mainly described. However, the present invention is not limited to these specific batteries. Needless to say, the present invention is not limited to the embodiment.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall configuration of an apparatus for manufacturing an electrode assembly for a battery according to the present invention. In FIG. 1, 1 is a winding core, 3 is a separator, 4 is a positive electrode, and 5 is a negative electrode. 1
1 and 12 are a first clamp roller and a second clamp roller, respectively.
The clamp roller is movable in a direction indicated by a double-headed arrow, and can clamp the supplied separator 3 or the separator 3 and the positive and negative electrodes 4 and 5 from above and below. This first,
The second clamp rollers 11 and 12 are desirably constituted by monoway rollers that rotate only in one direction.
Reference numeral 13 denotes an insertion plate, 14 denotes a retaining roller formed of a monoway roller, and 15 denotes a slack imparting roller, which moves in the direction of an arrow to impart a predetermined amount of slack to the separator 3. 16 is a feed roller, 17 is a cutter, 1
Numerals 8 and 19 are a positive electrode lead welding mechanism and a negative electrode lead welding mechanism, 20 is an outer tape, and 21 is an outer tape attaching mechanism. In the example of this figure, the winding core 1 is composed of two members 1a and 1b having a semicircular cross section, and three are prepared, and A, B,
C, three positions can be sequentially rotated and moved. At the position A, the separators 3, 3, and
The positive electrode 4 and the negative electrode 5 are wound up, and at the position B, the outer tape is attached to the wound electrode body 6,
At the position C, the work of extracting the core 1 is performed. Core 1
The rotational movement from the position A to the position B serves also to bring the separators 3 and 3 to the winding preparation position for the next winding operation. Thus, by preparing three winding cores 1 and performing different work at each position, the work efficiency can be improved. The number of the winding cores 1 is not limited to three, and may be one, two, or four or more.

Next, the operation of this apparatus will be described with reference to the drawings. First, as shown in FIG. 2, the first clamp rollers 11, 11 sandwich the separators 3, 3 from above and below and clamp them. At the same time, on the downstream side of the first clamp roller 11, the cutter 17 rises,
An operation of separating the separator 3 from the wound electrode body 6 at the position and attaching an outer tape to the electrode body 6 is performed.

Subsequently, as shown in FIG. 3, the retaining roller 14 advances, and the separator 3
3 and is brought into contact with the winding core 1. Retaining roller 1
Reference numeral 4 denotes a monoway roller that rotates only in the direction indicated by the arrow, and rotates with the rotation of the winding core 1 in the direction in which the separators 3, 3 are sequentially sent to the downstream side, but rotates in the reverse direction. In addition, the separator 3 is provided with a function of preventing the separators 3 from coming out of the gaps with the rotation of the winding core 1. After the retaining roller 14 sandwiches the separators 3 and 3 and comes into contact with the core 1, the second clamp roller 12 sandwiches and clamps the separators 3 and 3 and the positive electrode 4 and the negative electrode 5 from above and below.

Next, as shown in FIG. 4, the clamps by the first clamp rollers 11, 11 are released, the insertion member 13 is raised, and the separators 3, 3, which are the articles to be wound, are lifted.
Into the gap 2 of the winding core 1. Subsequently, the insertion member 13 descends, the core 1 starts rotating, and winding starts. The retaining roller 14 retreats at the stage where the separators 3 and 3 have been wound around the core 1 by at least one, and preferably about one or two, and releases the retaining function.

Returning to FIG. 1, the supply of the positive electrode 4 and the negative electrode 5 is started at predetermined times by feed rollers 16 and 16, respectively.
Are clamped by the clamp rollers 12,
Move to the winding position. Feed rollers 16, 16
The positive electrode 4 and the negative electrode 5 are the second clamp roller 12,
At the stage clamped by 12, the positive electrode 4 and the negative electrode 5
Release contact with. The positive electrode 4 and the negative electrode 5 are sequentially sent out to the winding position together with the separators 3 and 3,
At the stage when the winding of the negative electrode 5 around the winding core 1 is started, the clamps of the second clamp rollers 12, 12 are released.

At the end of the winding, the feed roller 1
6 and 16 clamp the positive electrode 4 and the negative electrode 5, respectively, and the cutters 17 and 17 near the feed rollers 16 and 16 function to cut the positive electrode 4 and the negative electrode 5, respectively.
Next, the core 1 stops rotating, rotates to the position B, and returns to the state of FIG.

In the above description, an example in which a retaining roller is used as the retaining means is shown. However, when the loosening roller 15 is used instead of the retaining roller, as shown in FIG. The slack imparting roller 15 moves forward, pushes up the separators 3, 3, extends its traveling path length, and imparts the separators 3, 3 with slack necessary for winding the core 1 at least once. Then the second
Clamp roller 12 from above and below separator 3,
3, the positive electrode 4 and the negative electrode 5 are sandwiched and clamped. As the second clamp roller 12 in this case,
It is preferable to use a monoway roller that rotates so as to send out the separators 3, 3 only in the downstream direction. Subsequently, as shown in FIG. 6, the first clamp roller 11,
11, the insertion member 13 is lifted, the insertion member 13 is raised, and a part of the separators 3, 3 is positioned in the gap 2, and the insertion member 13 is lowered, and the slack imparting roller 15 is also lowered, and 1 and 2nd clamp roller 1
A slack corresponding to at least one winding of the core 1 is left between the winding cores 2 and 12. In this state, the winding core 1 rotates, and winding is started. The subsequent operation is the same as the case where the retaining roller 14 is used.

In the above description, an example in which the insertion member 13 is used as a means for positioning the material to be wound in the gap portion 2 has been described. However, as shown in FIGS. It is also possible to position the separators 3, 3, which are the articles to be wound, in the gaps 2 of the winding core 1 using the rollers 15. That is, in FIG. 7, the wound electrode body 6
The winding core 1 moves with respect to the separators 3 and 3 extending from the core 3 and sandwiches the separators 3 and 3 in the gap 2 of the winding core 1. The movement of the core 1 with respect to the separators 3 and 3 is performed by moving the core 1 into two parts 1
a, 1b, the separators 3, 3 may be moved in the vertical direction to sandwich the separators 3, 3. If the winding core 1 is formed of a single member, By moving the separators 3 and 3 into the voids 2
It may be located inside.

Next, as shown in FIG. 8, the cutter 17 rises to cut the separators 3, 3 near the electrode body 6. Subsequently, the first clamp rollers 11, 11 move in the vertical direction to release the clamps on the separators 3, 3, and the slack imparting roller 15 moves forward. The slack imparting roller 15 pulls back the separators 3 and 3 so that the leading ends of the separators 3 and 3 do not penetrate the core 1 in the gap portion 2 and the second clamp rollers 12 and 12 and the core 1 The separators 3, 3 between them are provided with slack corresponding to at least one winding of the winding core 1. By doing so, it is possible to simultaneously position the separators 3, which are wound materials, at a predetermined position in the gap 2, and to provide slack.
Needless to say, the separators 3, 3 penetrating the core 1 may be pulled back by roller means or other moving members provided separately from the slack imparting roller 15. Further, instead of using the moving means such as the slack imparting roller 15, the winding core 1 is moved so that the separator 3,
3 may be located in the gap 2 of the winding core 1.

FIG. 9 shows another example of the stopper preventing means. After the separators 3, 3 and the like to be wound are positioned in the gap 2 of the winding core 1, the winding core 1 is formed. The separator 3 is sandwiched between the edge of the core component 1a and the edge of the core component 1b by rotating the core component 1a in the rotation direction. In this way, the core 1 is rotated while the separators 3 are sandwiched therebetween, and the material to be wound is wound on the core 1. Further, the core constituting member 1a may be relatively moved with respect to the core constituting member 1b, and the separators 3, 3 may be sandwiched between opposing surfaces of the core constituting member 1a and the core constituting member 1b. . As for the hand for preventing slipping as shown in FIG. 9, the means for preventing slipping using the above-described slipping roller and the slack imparting roller, and further, a plurality of other means for preventing slipping may be used in combination. Of course.

The electrode body 6 thus wound up is:
As shown in FIG. 10, the hiragana "no"
There is no material to be wound such as a separator remaining in the shape of a square, and there is no need to perform reforming of the center hole after the winding step. The manufacturing method or the manufacturing apparatus of the present invention is such that a part of an object to be wound such as a separator is positioned in the core gap so as not to penetrate the core, and the core is rotated and wound. Therefore, in the vicinity of the leading end of the wound object at the center of the electrode body 6, as shown by 22, only one fold where the inner wall edge of the gap 2 abuts usually remains. As shown in FIG. 11, the distance X between the fold 22 and the tip end 23 of the wound material is shorter than the diameter of the core shaft, in other words, the diameter of the center hole 7. On the other hand, in a conventional apparatus in which the wound object is rotated while being wound through the core, the leading end of the wound object at the center of the electrode body 6 is used. In the vicinity of the portion, for example, as shown in FIG. 19, two folds 22,
Usually, 22 remains. Therefore, the electrode body according to the present invention and the electrode body according to the prior art can be clearly distinguished by whether or not there is a fold at one place near the tip end of the wound object on the center side of the wound electrode body. Things. The fact that such a fold is not at one place does not necessarily mean that the fold is not necessarily manufactured by the manufacturing method or the manufacturing apparatus of the present invention.

FIGS. 12 to 17 show other examples of the winding core.
FIG. 12 shows that the gap 2 is formed as a groove penetrating the core at the end of the core, and FIG. 13 is a plan view of the core shown in FIG. 12 as viewed from above. FIG. 14 shows that the gap 2 is formed as a groove with a bottom at the end of the winding core.
FIG. FIG. 16 shows two members 1a and 1b.
And the gap 2 is formed as a penetrating groove at the end of the core. Also, at the time of drawing, 1a and 1b are drawn in the same direction. FIG.
Similarly, the core is composed of two members 1a and 1b, but the gap 2 is formed at the center of the core, and when the core is pulled out, the gaps 1a and 1b are pulled out in opposite directions. Each of these winding cores has a circular cross-sectional shape, but can take various shapes such as a triangle, a quadrangle, a pentagon, a hexagon, an octagon, and an ellipse. Further, it is needless to say that the winding core may be composed of three or more members.

Hereinafter, the present invention will be described in more detail with reference to Examples, but it goes without saying that the present invention is not limited to the following Examples.

[0031]

EXAMPLE An electrode assembly for a lithium ion secondary battery was manufactured using the apparatus shown in FIG. Two core components made of a cemented carbide having a semicircular cross section are opposed to each other with an interval of 0.45 mm to form a core with a diameter of 4 mm, on which polypropylene and polyethylene are laminated to a thickness of about 30 μm. A separator, a positive electrode and a negative electrode having a thickness of about 200 μm were wound thereon to obtain a cylindrical battery electrode body having a diameter of 18 mm. As the insertion member, a stainless steel plate having a thickness of 0.2 mm was used, and approximately 2 mm was inserted into the core gap. As a retaining prevention means, a slack imparting roller shown in FIGS. 5 and 6 was used, and slack of about 20 mm was provided. The electrode body is 1 in total
Twenty pieces were manufactured and their center hole shapes were examined. As a result, the center holes of the manufactured 120 electrode bodies were all in a clean circular shape with the core removed, and there was virtually no separator in the center holes. Next, the negative electrode lead and the negative electrode can were welded to each other by using a normal manufacturing apparatus, and assembled as batteries. However, all of the batteries exhibited good battery characteristics, and no defective products were found.

[0032]

As described above, according to the method and the apparatus for manufacturing an electrode assembly for a battery of the present invention, an electrode assembly in which an object to be wound does not remain in the shape of a "" in the center hole. Can be obtained easily and reliably. According to the present invention, the center hole can be reformed after winding the electrode body,
There is no need for molding, simplifying the manufacturing process, increasing production efficiency, and using no heat, solvents, adhesives, etc., so there is no need to consider the effects on battery performance and the environment . Therefore, such an electrode assembly for a battery is excellent as an electrode assembly, and a battery itself incorporating such an electrode assembly can provide an excellent battery with excellent performance.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall view of an electrode assembly manufacturing apparatus.

FIG. 2 is a diagram showing the operation of the electrode assembly manufacturing apparatus.

FIG. 3 is a view showing the operation of the electrode assembly manufacturing apparatus.

FIG. 4 is a view showing the operation of the electrode assembly manufacturing apparatus.

FIG. 5 is a diagram illustrating the operation of the electrode assembly manufacturing apparatus.

FIG. 6 is a view showing the operation of the electrode assembly manufacturing apparatus.

FIG. 7 is a view showing another example of the electrode body manufacturing apparatus.

FIG. 8 is a view showing another example of the electrode assembly manufacturing apparatus.

FIG. 9 is a view showing another example of the electrode assembly manufacturing apparatus.

FIG. 10 is a side view showing an example of the electrode body of the present invention.

FIG. 11 is an enlarged view of a part of the electrode body of the present invention.

FIG. 12 is a side view showing an example of a winding core.

FIG. 13 is a plan view showing an example of a winding core.

FIG. 14 is a side view showing an example of a winding core.

FIG. 15 is a plan view showing an example of a winding core.

FIG. 16 is a plan view showing an example of a winding core.

FIG. 17 is a plan view showing an example of a winding core.

FIG. 18 is a diagram showing a conventional method for manufacturing an electrode body.

FIG. 19 is a side view of a conventional electrode body.

FIG. 20 is a cross-sectional view illustrating a conventional battery manufacturing method.

[Description of Signs] 1 core 2 void 3 separator 4 positive electrode 5 negative electrode 6 electrode body 7 center hole 8 negative electrode can 9 negative electrode lead 10 welding rod 11 first clamp roller 12 second clamp roller 13 insertion member 14 retaining member Roller 15 Loosening roller 16 Feed roller 17 Cutter 18 Positive electrode lead welding mechanism 19 Negative electrode lead welding mechanism 20 Outer tape 21 Outer tape sticking mechanism 22 Fold X Distance from tip of wound object

Claims (16)

[Claims] Claims: 1. A part of an object to be wound is positioned in a space defined by the winding core along the rotation axis direction so as not to penetrate the winding core in a direction perpendicular to the rotation axis of the winding core. A method of manufacturing an electrode body for a battery, wherein an object to be wound is wound on a winding core by rotating a core to manufacture an electrode body. 2. The battery for a battery according to claim 1, wherein the core is rotated while the wound object is prevented from falling out of the core gap until at least one wound object is wound on the core. A method for manufacturing an electrode body. 3. The wound object is prevented from falling out of the core void by contacting the wound core with a monoway roller that rotates only in one direction. 3. A method for producing a battery electrode assembly according to item 2. 4. The wound object is prevented from falling out of the core void by providing the wound object with a slack corresponding to at least one winding on the winding core. A method for producing a battery electrode body. 5. An insertion member which can enter into a core space,
5. The method for producing a battery electrode body according to claim 1, wherein the wound electrode is moved relative to the core void, and a part of the wound object is positioned in the core void. 6. An object to be wound comprising a separator, a positive electrode and / or
Or a laminate of negative electrodes.
A method for producing an electrode assembly for a battery according to the above. 7. A winding core having a gap along a rotation axis direction, and means for positioning a wound object in the gap so as not to penetrate the winding core in a direction orthogonal to the rotation axis direction of the winding core. ,
An apparatus for manufacturing a battery electrode body, comprising: a winding core rotating means. 8. The battery electrode manufacturing apparatus according to claim 7, wherein the core is formed of a single member, and the gap is a groove formed in the core. 9. The battery electrode assembly manufacturing apparatus according to claim 7, wherein the winding core is composed of two or more members, and the gap is a gap between the opposed members. 10. A means for positioning an object to be wound in a gap portion, wherein the insertion member is capable of entering the core gap portion, and the insertion member does not penetrate the core in a direction orthogonal to the core rotation axis direction. Means for inserting into the gap to the extent possible.
10. The apparatus for manufacturing an electrode body for a battery according to 8 or 9. 11. A means for preventing the object to be wound from coming out of the core gap until at least one winding of the object to be wound on the winding core is provided. 10
An apparatus for manufacturing an electrode body for a battery according to the above. 12. A means for preventing a material to be wound from coming out of a core void portion, wherein said means for abutting on the core with the material to be wound interposed therebetween.
The apparatus for manufacturing a battery electrode assembly according to claim 11, wherein the apparatus is a monoway roller that rotates only in one direction. 13. The means for preventing the material to be wound from falling out of the core void portion is means for giving the material to be wound a slack corresponding to at least one turn on the core.
2. An apparatus for manufacturing a battery electrode assembly according to claim 1. 14. A means for causing a wound object to have a slack corresponding to at least one winding on a winding core, comprising: means for extending a running path length of the wound object by a predetermined length; 14. The apparatus for manufacturing an electrode assembly for a battery according to claim 13, wherein the apparatus is a monoway roller that rotates only in one direction in contact with the object to be wound, on the upstream side of the object to be wound with respect to the means for extending the running path length by a predetermined length. . 15. The method for producing a battery electrode assembly according to claim 1, 2, 3, 4, 5, or 6, or claim 7,
An electrode assembly for a battery manufactured by the apparatus for manufacturing an electrode for a battery according to 8, 9, 10, 11, 12, 13 or 14. 16. A battery incorporating the battery electrode assembly according to claim 15.