JP5599366B2 - Method for producing solid assembled battery - Google Patents

Description

  The present invention relates to a method for manufacturing a solid assembled battery.

  In recent years, electronic devices such as high-performance mobile phones, PDAs, and notebook personal computers are widely spread and mass-produced. For this reason, batteries mounted on these highly functional devices are required not only to have high battery performance but also to be mass-productive.

  As an example of such a battery, a solid thin film battery that has high battery performance and can be easily manufactured has been proposed (for example, see Patent Document 1). The solid thin film battery described in Patent Document 1 includes a plurality of solid thin film batteries each including a positive and negative electrode layer and a solid electrolyte layer disposed between the positive electrode layer and a positive electrode layer at a positive electrode connection ear of each solid thin film battery. Are connected to each other, and negative electrode connection means each having a negative electrode layer connected to each negative electrode connection ear.

JP 2008-293791 A

  By the way, in the solid thin film battery described in Patent Document 1, since the arrangement of the connection ears of each solid thin film battery is different, the shape of each solid thin film battery is different, and various members constituting these solid thin film batteries are used. And it becomes easy to manufacture only after preparing the parts. In addition, since each solid thin film battery is a single product, it is difficult to continuously stack these solid thin film batteries, that is, to continuously manufacture the solid thin film battery. For this reason, the said solid thin film battery is not suitable for mass production, and there exists a problem that the mass productivity currently calculated | required is not satisfy | filled.

  Furthermore, in the solid thin film battery, it is necessary to reduce the width of each connection ear according to the number of stacked solid thin film batteries, so there is a limit to the number of stacked layers, and the battery performance can be improved with a large number of stacked layers. Can not.

  Then, an object of this invention is to provide the manufacturing method of the solid assembled battery which has high battery performance and can be manufactured continuously.

In order to solve the above-mentioned problems, a method for producing a solid assembled battery according to claim 1 of the present invention includes a plurality of battery element units formed in this order from an electrode layer, a solid electrolyte layer and a counter electrode layer on a strip electrode collector. And a manufacturing method of a solid assembled battery laminated via a strip-shaped counter electrode current collector,
On the front and back surfaces of the strip electrode collector, a strip insulator having a plurality of openings formed in the length direction is disposed,
In order to bring the electrode layer of the battery element alone into contact with the strip electrode current collector, the battery element simple substance is disposed in each opening,
The band electrode current collector and the band counter electrode current collector are crossed and folded alternately so that the band electrode counter current collector is sandwiched from the front and back surfaces of both counter electrode layers of adjacent battery elements. And
The laminate was pressurized in the stacking direction of the battery element alone,
The strip-shaped insulator is formed with a slit for exposing the strip-shaped electrode current collector at each mountain fold position .

A solid assembled battery manufacturing method according to claim 2 is the solid assembled battery manufacturing method according to claim 1, wherein the strip insulator is wider than the strip electrode current collector and the opening is formed in the strip electrode collector. It is narrower than the electric body.

  According to the method of manufacturing a solid assembled battery, a strip electrode assembly in which a plurality of battery elements are arranged and a strip counter current collector are crossed and folded alternately to form a laminate, and then the laminate Since the solid assembled battery is manufactured by pressing the body in the stacking direction of the battery elements alone, it is possible to continuously manufacture a solid assembled battery having a large number of stacked layers and high battery performance.

It is sectional drawing of the solid assembled battery which concerns on Embodiment 1 of this invention, (a) is sectional drawing of the width direction of a strip | belt-shaped positive electrode collector, (b) is sectional drawing of the width direction of a strip | belt-shaped negative electrode collector. is there. It is a perspective view for demonstrating the state which bonds a strip | belt-shaped heat-fusion film on the front and back of the strip | belt-shaped positive electrode electrical power collector in the solid assembled battery. It is a perspective view for demonstrating the state which cross | intersects the strip | belt-shaped positive electrode collector and strip | belt-shaped negative electrode collector in the same solid assembled battery, and folds alternately. It is a block diagram which shows the manufacturing process of the solid assembled battery which concerns on the Example of this invention. It is a figure of the double-sided film-forming apparatus used for the manufacturing process, (a) is a top view of a double-sided film-forming apparatus, (b) is a side view of the endless belt type mask in a double-sided film-forming apparatus. It is sectional drawing for demonstrating the state which folds a strip | belt-shaped positive electrode collector in the lamination process in the manufacturing process.

[Embodiment 1]
Hereinafter, a method for manufacturing a solid assembled battery according to Embodiment 1 of the present invention will be described with reference to the drawings.
First, the basic configuration of the solid assembled battery will be described.

  As shown in FIG. 1, this solid assembled battery includes a strip-shaped positive electrode current collector (which is an example of a strip-shaped electrode current collector) 1 and a strip-shaped negative electrode current collector (a strip-shaped counter electrode current collector) that are alternately folded. 3), a thin-film battery element unit (which is an example of a single battery element) 10 disposed between the crossing surfaces of the strip-shaped positive electrode current collector 1 and the strip-shaped negative electrode current collector 3, and a strip-shaped positive electrode A band-shaped heat-sealing film (which is an example of a band-shaped insulator) 20 disposed on the front and back surfaces of the current collector 1 and having an insulating property, and each slit 22 formed in a mountain fold portion of the band-shaped heat-sealing film 20 The positive electrode plate 41 connecting the mountain folds of the strip-shaped positive electrode current collector 1 exposed from the above, the negative electrode plate 43 connecting the mountain folds of the strip-shaped negative electrode current collector 3, respectively, and the positive electrode plate 41 and the negative electrode plate 43 A positive lead 51 and a negative lead 53 connected to each other; Comprising an exterior body (not shown) for wrapping the outer peripheral side of the positive electrode plate 41 and the negative electrode plate 43.

  Here, the band-shaped heat fusion film 20 is bonded (arranged) to the front and back surfaces of the band-shaped positive electrode current collector 1, and a slit 22 that exposes the mountain fold portion of the band-shaped positive electrode current collector 1. In addition, an opening 21 is formed on the surface intersecting with the strip-shaped negative electrode current collector 3 to place the thin film battery element unit 10 in contact with the strip-shaped positive electrode current collector 1.

  Further, the thin film battery element 10 is formed in this order from a positive electrode layer (an example of an electrode layer) 11, a solid electrolyte layer 12, and a negative electrode layer (an example of a counter electrode layer) 13. The single thin film battery element 10 is formed (arranged) in each of the openings 21 so that the positive electrode layer 11 is in contact with the belt-like positive electrode current collector 1. The negative electrode layer 13 comes into contact with the strip-shaped negative electrode current collector 3 by crossing and alternately folding the electric bodies 3. In practice, the belt-like heat-sealing film 20 is fused in each layer to seal the thin film battery element unit 10. However, for simplicity in FIG. 1, before the belt-like heat-sealing film 20 is fused. Indicates the state.

  Each of the positive electrode plate 41 and the negative electrode plate 43 is formed in a U shape by curving a conductive plate, and is composed of a strip-shaped positive electrode current collector 1, a thin film battery element unit 10, and a strip-shaped negative electrode current collector 3. A single battery is connected in parallel.

Hereinafter, the manufacturing method of the said solid assembled battery is demonstrated.
First, as shown in FIG. 2, a band-shaped heat fusion film 20 wider than the band-shaped positive electrode current collector 1 is placed on the front and back surfaces of the band-shaped positive electrode current collector 1 in the width direction of the band-shaped positive electrode current collector 1. Match the centers and paste them together. A plurality of rectangular openings 21 that are narrower than the belt-like positive electrode collector 1 and have a rectangular shape are formed in the belt-like heat fusion film 20 at equal intervals in the length direction. Further, every other slit 22 is formed in the middle of the adjacent openings 21. The positions of the slits 22 correspond to the mountain-folded portions of the band-shaped positive electrode current collector 1 and the band-shaped heat fusion film 20 when the band-shaped positive electrode current collector 1 is alternately folded with the band-shaped negative electrode current collector 3. Is the position (mountain folding position).

  Next, with respect to the strip-shaped positive electrode current collector 1 in which the both strip-shaped heat fusion films 20 are bonded to the front and back surfaces, the thin film battery element single body 10 is formed in each of the openings 21, and the positive electrode layer 11 is the strip-shaped positive electrode current collector 1. The film is formed so as to come into contact with the film. Since the opening 21 is located on the front and back surfaces of the strip-shaped positive electrode current collector 1, the thin film battery element unit 10 is formed from both sides of the front and back surfaces of the strip-shaped positive electrode current collector 1. Actually, the thin film battery element unit 10 is formed in all the openings 21 except for the opening 21 on the back surface on one end side. However, in FIG. 2, for the sake of simplicity, the two thin film battery element units 10 are formed. The state to be formed is shown.

  And each thin film battery element single-piece | unit 10 formed into the film on the front and back of the strip | belt-shaped positive electrode collector 1 is pressurized from the both sides of a front and back, and the thin film battery element single | mono_unit 10 is made the surface of the strip | belt-shaped positive electrode collector 1 into the surface. Temporarily fix to the back side.

  Thereafter, as shown in FIG. 3, the strip-shaped positive electrode current collector 1 and the strip-shaped negative electrode current collector 3 are crossed and alternately folded. Hereinafter, the folding will be described in detail, but for convenience, the thin film battery element single body 10 formed on one end side of the surface of the strip-shaped positive electrode current collector 1 is referred to as a first front side single body and is adjacent to the first front side single body. The thin film battery element unit 10 is referred to as a second front side unit, and the thin film battery element units 10 that are sequentially adjacent to each other are referred to as a third front side unit and a fourth front side unit. Similarly, the thin film battery element unit 10 formed on one end of the back surface of the strip-shaped positive electrode current collector 1 is referred to as a first back side unit, and the adjacent thin film battery element units 10 are sequentially connected to the second back side unit and the third back side. Single unit, 4th back side single unit. In addition, about the 1st back side single-piece | unit, it removes before folding or it does not form into a film, but the back surface of the one end part of the strip | belt-shaped positive electrode collector 1 is exposed from the opening part 21. FIG.

  First, one end of the strip-shaped negative electrode current collector 3 is brought into contact with the surface of one end of the strip-shaped positive electrode current collector 1 so that the strip-shaped positive electrode current collector 1 and the strip-shaped negative electrode current collector 3 intersect on the same plane. . That is, the single negative electrode layer 13 of the first front side contacts the back surface of one end of the strip-shaped negative electrode current collector 3, and the length direction and width direction of the strip-shaped positive electrode current collector 1 and the length of the strip-shaped negative electrode current collector 3 The vertical direction and the width direction are orthogonal to each other on the same plane. And the strip | belt-shaped positive electrode collector 1 is folded so that the position of the slit 22 of the strip | belt-shaped heat sealing | fusion film 20 bonded on the back surface of the strip | belt-shaped positive electrode collector 1 may become a mountain fold part. Specifically, the surface of the strip-like positive electrode current collector 1 is valley-folded and the back surface is mountain-folded. Thereby, the single negative electrode layer 13 on the second front side comes into contact with the surface of the strip-shaped negative electrode current collector 3. That is, one end of the strip-shaped negative electrode current collector 3 is sandwiched between the first front-side single negative electrode layer 13 from the back surface and the second front-side single negative electrode layer 13 from the front surface. Next, the strip-shaped negative electrode current collector 3 is folded so that the second back-side single negative electrode layer 13 is in contact with the surface of the strip-shaped negative electrode current collector 3. Specifically, the surface of the strip-shaped negative electrode current collector 3 is valley-folded and the back surface is mountain-folded. And similarly, the strip | belt-shaped positive electrode collector 1 is folded so that the position of the slit 22 of the strip | belt-shaped heat sealing | fusion film 20 bonded together on the surface of the strip | belt-shaped positive electrode collector 1 may become a mountain fold part. Specifically, the back surface of the strip-shaped positive electrode current collector 1 is valley-folded and the surface is mountain-folded. As a result, the single negative electrode layer 13 on the third back side contacts the surface of the strip-shaped negative electrode current collector 3. That is, the adjacent portion adjacent to one end of the strip-shaped negative electrode current collector 3 is sandwiched between the second back side single negative electrode layer 13 from the back surface and the third back side single negative electrode layer 13 from the front surface. Next, the strip-like negative electrode current collector 3 is folded so that the single negative electrode layer 13 of the third front side contacts the back surface of the strip-like negative electrode current collector 3. Specifically, the back surface of the strip-shaped negative electrode current collector 3 is valley-folded and the surface is mountain-folded. In the above description, it has been described that the strip-shaped positive electrode current collector 1 and the strip-shaped negative electrode current collector 3 are folded twice, but in actuality, the desired number of stacks of the thin film battery element unit 10 is folded in the same manner. Finally, the strip-shaped negative electrode current collector is arranged so that the other end portion of the strip-shaped negative electrode current collector 3 is in contact with the negative electrode layer 13 of the thin-film battery element unit 10 formed on the other end portion of the strip-shaped positive electrode current collector 1. Fold 3 in. The band-shaped positive electrode current collector 1 and the band-shaped negative electrode current collector 3 formed by folding are hereinafter referred to as a laminate for convenience.

  Next, the laminated body is heated simultaneously with pressurization in the laminating direction of the thin film battery element unit 10. By this pressurization, the single layer thin film battery element 10, the strip-shaped positive electrode current collector 1, and the strip-shaped negative electrode current collector 3 are fixed. On the other hand, due to the heating, the belt-like heat-sealing film 20 melts and adheres to each other in each layer. In other words, the belt-like heat fusion film 20 is fused in each layer by the heating. Here, the band-shaped heat-sealing film 20 has the thin film battery element unit 10 disposed in each formed opening portion 21, that is, surrounds the outer periphery of the thin film battery element unit 10 of each layer. The thin film battery element single body 10 of each layer is sealed. Hereinafter, the pressed and heated laminate is referred to as a sealed laminate for convenience.

  After that, each mountain fold portion of the strip-shaped positive electrode current collector 1 exposed from each slit 22 of the strip-shaped heat-sealing film 20 of the sealed laminate is connected by the positive electrode plate 41, and the strip-shaped negative electrode collector of the sealed laminate is 3 are connected by a negative electrode plate 43. Specifically, the positive electrode plate 41 is fitted from one end side of the strip-shaped positive electrode current collector 1 in the sealing laminate, and is brought into contact with each mountain fold portion of the strip-shaped positive electrode current collector 1, and the negative electrode plate 43 is sealed. Is fitted from the other end side of the strip-shaped negative electrode current collector 3 and is brought into contact with each mountain fold portion of the strip-shaped negative electrode current collector 3. Hereinafter, the sealed laminate in which the positive electrode plate 41 and the negative electrode plate 43 are fitted is referred to as a semi-finished product for convenience.

  Then, the positive electrode lead 51 and the negative electrode lead 53 are respectively connected to the positive electrode plate 41 and the negative electrode plate 43 of the semi-finished product, and the semi-finished product is packaged with an exterior body, and each one end portion of the positive electrode lead 51 and the negative electrode lead 53 is A solid assembled battery is manufactured by disposing it outside the exterior body.

  As described above, in the method for producing a solid assembled battery, the strip-shaped positive electrode current collector 1 and the strip-shaped negative electrode current collector 3 are crossed and alternately folded to form a laminate, and the positive electrode plate 41 and the negative electrode are formed on the laminate. Since the solid assembled battery is manufactured by fitting the plate 43, the manufacturing time can be shortened, and a solid assembled battery having a large number of stacked layers and high battery performance can be continuously manufactured.

  Moreover, in the manufacturing method of the above-mentioned solid assembled battery, since the strip-shaped heat fusion film 20 having insulating properties is disposed so as to surround the outer periphery of each thin-film battery element unit 10 on the front and back surfaces of the strip-shaped positive electrode current collector 1, a short circuit is caused. And a highly reliable solid assembled battery can be manufactured.

  Furthermore, in the method for producing a solid assembled battery, the thin film battery element unit 10 by the band-shaped heat-sealing film 20 can be sealed in the pressurizing process by simultaneously pressing the laminated body in the laminating direction and heating it. The battery manufacturing time can be further shortened.

  Hereinafter, a method for continuously manufacturing a solid assembled battery using a manufacturing apparatus will be described as an example showing the first embodiment more specifically. In addition, the same code | symbol is attached | subjected to the structure same as the said Embodiment 1, and description is abbreviate | omitted.

  The method for continuously producing a solid assembled battery by the above production apparatus is roughly divided into six steps. As shown in FIG. 4, the six steps include a laminating step (first step) 71 for bonding the band-shaped heat fusion film 20 to the front and back surfaces of the band-shaped positive electrode current collector 1, and a plurality of steps on the band-shaped positive electrode current collector 1. Double-sided film forming step (second step) 72 for forming thin film battery element single body 10, temporary pressing step (third process) 73 for temporarily pressing each thin film battery element single body 10, strip-shaped positive electrode current collector 1 and strip-shaped negative electrode collector A stacking step (fourth step) 74 that crosses the electric body 3 and alternately folds, a main pressing step (fifth step) 75 that presses the stack in the stacking direction, and a sealing laminate is packaged with an outer package. This is a packaging process (sixth process) 76 for manufacturing the solid assembled battery.

First, the laminating process 71 as the first process will be described.
As shown in FIG. 4, in this laminating step 71, the belt-like heat-sealing film 20 is unwound from the front surface roll 82A and the back surface roll 82B arranged in parallel, and the front surface roll 82A and the back surface roll 82B. The strip-shaped positive electrode current collector 1 is unwound between the two strip-shaped heat-sealing films 20 from a roll 81 for the positive electrode current collector disposed between the two. The unrolled double-band heat-sealing film 20 and the strip-shaped positive electrode current collector 1 are passed between both plywood rollers 84 arranged in parallel and in contact with each other, and both band-shaped on the front and back surfaces of the strip-shaped positive electrode current collector 1 The heat sealing film 20 is continuously bonded.

Next, the double-sided film forming step 72 as the second step will be described.
In this double-sided film forming step 72, the thin film battery element unit 10 is applied by electrostatic spraying (to be described later) from both sides of the front and back surfaces of the strip-like positive electrode current collector 1 that moves in the length direction with the width direction set to the vertical direction. The film is continuously formed.

  As shown in FIG. 5 (a), the double-sided film forming apparatus 99 used in the double-sided film forming process includes a front surface film forming apparatus 99A and a back surface film forming apparatus 99B. Is the same configuration. The surface film forming apparatus 99A includes an electrostatic spray 90 disposed with a spray port 90N facing the surface of the belt-like positive electrode current collector 1, and an endless belt having a rectangular plan view around the electrostatic spray 90. Type mask 92, four supporting rotating rollers 94 that support and rotate the endless belt type mask 92, and a suction device that is arranged with the suction port 95 N facing the inner peripheral surface of the endless belt type mask 92 95.

  Here, the endless belt-type mask 92 is wider than the belt-like heat-sealing film 20, and is stretched in a rectangular shape with the width direction being the vertical direction, and one side of the rectangle is parallel to the belt-like positive electrode current collector 1. In addition, they are arranged close to each other. As shown in FIG. 5 (b), the endless belt mask 92 has a film-forming opening 91 slightly larger than the opening 21 of the belt-like heat fusion film 20. A plurality are formed corresponding to the positions of 21, that is, in the length direction. The four support rotation rollers 94 rotate around the vertical axis to rotate and move the endless belt type mask 92. By this rotational movement, the center of the film-forming opening 91 of the endless belt-type mask 92 can follow the center of the opening 21 of the moving belt-like heat fusion film 20. On the other hand, the electrostatic spray 90 sprays the thin film battery element unit 10 from the injection port onto the film forming opening 91 of the endless belt type mask 92, so that the thin film battery element having the size of the film forming opening 91 is formed. The single body 10 is continuously formed in the opening 21 of the belt-like heat fusion film 20. The suction unit 95 absorbs a part of the thin film battery element unit 10 adhering to the periphery of the film forming opening 91 of the endless belt type mask 92 from the suction port 95N for reuse.

On the other hand, the back surface film forming apparatus 99B has the same configuration as the front surface film forming apparatus 99A and is disposed on the back surface side of the belt-like positive electrode current collector 1.
By the double-sided film forming apparatus 99, the thin film battery element single body 10 slightly larger than the opening 21 of the band-shaped heat-sealing film 20 with respect to the band-shaped positive electrode current collector 1 moving in the length direction with the width direction set to the vertical direction. Is continuously formed on each opening 21 of the belt-like heat-sealing film 20 from both sides of the front and back surfaces.

Next, the temporary press process 73 which is a 3rd process is demonstrated.
In this temporary pressing step 73, the thin film battery element formed on the front and back surfaces of the belt-like positive electrode current collector 1 by a temporary press machine 88 fixed to the belt-like positive electrode current collector 1 moving in the length direction. The single body 10 is continuously pressurized from both sides of the front and back surfaces. As the temporary press machine 88, a single action press, a roller press or the like is used.

Next, the lamination process 74 as the fourth process will be described.
First, one end portion of the strip-shaped negative electrode current collector 3 unwound from the negative electrode current collector roll 83 is crossed and overlapped with one end portion of the strip-shaped positive electrode current collector 1. Then, as shown in FIG. 6, the strip-like positive electrode current collector 1 and the strip-like negative electrode current collector 3 are kept in contact with each other while the longitudinal direction of the strip-like negative electrode current collector 3 is set as the axis X. The strip-shaped negative electrode current collector 3 is inverted so as to wind up the current collector 1. Thereby, the strip | belt-shaped positive electrode collector 1 is folded. Next, the strip-shaped positive electrode current collector 1 is reversed so that the strip-shaped negative electrode current collector 3 is wound around the length direction of the strip-shaped positive electrode current collector 1. Thereby, the strip-shaped negative electrode current collector 3 is folded. Similarly, when the strip-shaped positive electrode current collector 1 and the strip-shaped negative electrode current collector 3 are alternately folded to obtain a desired number of stacked thin film battery elements 10, the strip-shaped positive electrode current collector 1 and the strip-shaped negative electrode current collector 1 are obtained. The electric body 3 is cut | disconnected and a laminated body is isolate | separated from the said strip | belt-shaped positive electrode collector 1 and the strip | belt-shaped negative electrode collector 3, ie, a laminated body is formed.

Next, this press process 75 which is a 5th process is demonstrated.
In the present pressing step 75, although not shown, each laminated body conveyed by the conveyor is pressurized in the laminating direction of the thin film battery element unit 10 by a fixed present pressing machine. Simultaneously with this pressurization, the laminate is heated to fuse the belt-like heat-sealing film 20 with each layer to seal the thin film battery element unit 10 to form a sealed laminate.

Next, the packaging process 76 as the sixth process will be described.
The device used in the packaging process 76 is not shown, but the positive electrode plate 41 and the negative electrode plate 43 formed by bending a conductive plate into a U shape, the positive electrode lead 51 and the negative electrode lead 53 that are metal foil pieces, and sealing A plurality of exterior bodies for packaging the laminate are prepared. Then, the positive electrode plate 41 is fitted from one end side of the belt-like positive electrode current collector 1 in the sealing laminate by the apparatus used in the packaging process 76, and the positive electrode plate 41 is brought into contact with each mountain fold portion of the belt-like positive electrode current collector 1. In addition, the negative electrode plate 43 is fitted from the other end side of the strip-shaped negative electrode current collector 3 in the sealing laminate, and the negative electrode plate 43 is brought into contact with each mountain fold portion of the strip-shaped negative electrode current collector 3, thereby producing a semi-finished product. Manufacturing. Thereafter, the positive electrode lead 51 and the negative electrode lead 53 are connected to the positive electrode layer 11 and the negative electrode layer 13, respectively, and this semi-finished product is packaged with an outer package, and each one end of the positive electrode lead 51 and the negative electrode lead 53 is connected to the outside of the outer package. The solid assembled battery is manufactured by arranging in the above.

As described above, in the method for producing a solid assembled battery, the solid assembled battery can be continuously produced by a production apparatus having a simple configuration. Further, the yield can be improved by absorbing a part of the thin film battery element unit 10 adhering to the endless belt type mask 92 by the suction device 95 and reusing it.
[Embodiment 2]
Next, a method for manufacturing a solid assembled battery according to Embodiment 2 of the present invention will be described.

  The method for manufacturing a solid assembled battery according to Embodiment 2 of the present invention is obtained by reversing the polarity (positive and negative electrodes) in the method for manufacturing a solid assembled battery according to Embodiment 1 described above. That is, in the solid assembled battery manufacturing method according to Embodiment 1 described above, the strip-shaped positive electrode current collector 1 and the positive electrode layer 11 will be described as examples of the strip-shaped electrode current collector and the electrode layer, and the strip-shaped counter electrode current collector and the counter electrode will be described. Although the strip-shaped negative electrode current collector 3 and the negative electrode layer 13 have been described as examples of the layers, in the method for manufacturing the solid assembled battery according to Embodiment 2, the strip-shaped electrode current collector and the electrode layer are the strip-shaped negative electrode current collector and the negative electrode layer. The band-shaped counter current collector and the counter electrode layer are the band-shaped positive electrode current collector and the positive electrode layer.

  The manufacturing method of the solid assembled battery according to the second embodiment has the same configuration as the manufacturing method of the solid assembled battery according to the first embodiment except that the polarity (positive and negative electrodes) is reversed in this way. .

  By the way, in the first embodiment, the example and the second embodiment, it has been described that the laminated body is heated at the same time as being pressurized. However, the present invention is not limited to this, and the laminated body is heated after being pressurized. May be.

DESCRIPTION OF SYMBOLS 1 Strip | belt-shaped positive electrode collector 3 Strip | belt-shaped negative electrode collector 10 Thin film battery element simple substance 11 Positive electrode layer 12 Solid electrolyte layer 13 Negative electrode layer 20 Strip | belt-shaped heat-fusion film | membrane 21 Opening 22 Slit 41 Positive electrode plate 43 Negative electrode plate 51 Positive electrode lead 53 Negative electrode lead 81 Positive electrode current collector roll 82 A Front surface roll 82 B Back surface roll 83 Negative electrode current collector roll 88 Temporary press 91 Film forming opening 92 Endless belt type mask 99 Double-sided film forming apparatus

Claims (2)

A battery element unit formed in this order from an electrode layer, a solid electrolyte layer, and a counter electrode layer is a method for producing a solid assembled battery in which a plurality of electrode elements are arranged on a band electrode collector and laminated via a band electrode counter current collector,
On the front and back surfaces of the strip electrode collector, a strip insulator having a plurality of openings formed in the length direction is disposed,
In order to bring the electrode layer of the battery element alone into contact with the strip electrode current collector, the battery element simple substance is disposed in each opening,
The band electrode current collector and the band counter electrode current collector are crossed and folded alternately so that the band electrode counter current collector is sandwiched from the front and back surfaces of both counter electrode layers of adjacent battery elements. And
The laminate was pressurized in the stacking direction of the battery element alone,
A method for producing a solid assembled battery, wherein the strip insulator is formed with a slit for exposing the strip electrode collector at each mountain folding position . 2. The method for producing a solid assembled battery according to claim 1, wherein the band-shaped insulator is wider than the band-shaped electrode current collector, and the opening is narrower than the band-shaped electrode current collector .

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