JP2000138076A - Lithium polymer secondary battery, its manufacturing device and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a lithium ion polymer secondary battery having high reliability and a high function. SOLUTION: A negative electrode material 4 and a positive electrode material 3 having electrode activating materials 6 and 11, and gel type electrolytes 7 and 12 applied to strip type current collectors 5 and 10 are wound around a film type core material 2 as a core in such a state as overlaid on the external surface of the core material 2. The core material 2 constitutes a core within the range of electrode activating material coating parts 8 and 13 where the electrode activating materials 6 and 11 are not applied to the current collectors 5 and 10. The core material 2 is directly wound around the external surface of the core member of a manufacturing device, and a negative electrode material 4 and a positive electrode material 3 are wound around the external surface of the core member, thereby preventing the gel type electrolytes 7 and 12 from adhering to the core member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium polymer secondary battery in which a negative electrode material obtained by applying a polar active material and a gel electrolyte to a belt-shaped current collector and a positive electrode material are wound in a superposed state. The present invention relates to a manufacturing apparatus and a manufacturing method.

[0002]

2. Description of the Related Art In portable electronic devices, for example, a lithium ion secondary battery which can be repeatedly charged and is small in size and large in capacity is generally used as its power source. In portable electronic devices and the like, in order to secure power supply capacity due to multifunctionality or long-time use and to improve portability by downsizing and weight reduction, further miniaturization than lithium ion secondary batteries is achieved. In addition, there is a high demand for a highly safe secondary battery.

As such a secondary battery, a lithium ion polymer secondary battery (hereinafter simply referred to as a polymer secondary battery) has been receiving attention. The polymer secondary battery is made of a polymer material compatible with the electrolytic solution, such as polyvinylidene fluoride (PVdF) or polyacrylonitrile (PAN).
Are mixed to use an electrolyte which is gelled. The polymer secondary battery forms a negative electrode material and a positive electrode material by applying the gel electrolyte, and is configured by appropriately overlapping the negative electrode material and the positive electrode material.

[0004] Various types of polymer secondary batteries have been proposed, which are distinguished by a superposed structure of a negative electrode material and a positive electrode material. The polymer secondary battery is, for example, the stack type polymer secondary battery 100 shown in FIG. 16, the separator wound type polymer secondary battery 110 shown in FIG. 17, or the coreless wound type polymer secondary battery 130 shown in FIG. Although not shown, a zigzag-type polymer secondary battery formed by laminating a negative electrode material and a positive electrode material and then knitting them is proposed.

[0005] In a stack type polymer secondary battery 100, a positive electrode material 101 and a negative electrode material 102 formed in a predetermined outer shape on a flat plate are overlapped with a gel electrolyte 103 interposed therebetween, as shown in FIG. Single cell 104 shown in A)
Is constituted. The positive electrode material 101 includes a positive electrode current collector 105 formed into a predetermined outer shape by a film material such as an aluminum foil, and a positive electrode active material 106 applied to a main surface of the positive electrode current collector 105. The negative electrode material 102 includes a negative electrode current collector 107 formed of a film material such as a copper foil to have a slightly larger outer shape than the positive electrode current collector 105, and a negative electrode active material applied to a main surface of the negative electrode current collector 107. 108
Consists of

The stack type polymer secondary battery 100 is shown in FIG.
As shown in FIG. 6B, the plurality of single cells 104A described above
To 104N are stacked in the thickness direction to achieve a large capacity. The stack type polymer secondary battery 100 has a configuration in which, for example, a large-sized negative electrode material 102 is connected to a battery can at the outer periphery thereof, and a positive electrode material 101 is connected to a positive electrode terminal member via a connection structure (not shown). I have.

[0007] A separator wound type polymer secondary battery 110
In a similar manner to a lithium ion secondary battery using a liquid electrolyte, a strip-shaped positive electrode material 111 and a negative electrode material 112 are spirally wound with a separator 113 interposed therebetween. The positive electrode material 111 includes a positive electrode current collector 114 made of a band-shaped film material such as an aluminum foil, and the positive electrode current collector 114.
And a positive electrode active material 115 applied on the main surface of In the positive electrode material 111, a positive electrode external terminal 116 is joined to a positive electrode current collector 114 at an innermost peripheral portion.

The negative electrode material 112 includes a negative electrode current collector 117 made of a band-shaped film material such as a copper foil, and a negative electrode active material 118 applied to the main surface of the negative electrode current collector 117. A negative electrode external terminal 119 is joined to the negative electrode current collector 117 at the innermost periphery of the negative electrode material 112. The separator 113 is made of, for example, a porous band-shaped synthetic resin film that allows lithium ions to pass therethrough, for example, a polypropylene film or polyethylene, and is sandwiched between the positive electrode material 111 and the negative electrode material 112.

Separator wound type polymer secondary battery 110
In this method, a gelled positive electrode electrolyte 120 is applied on a positive electrode active material 115 of a positive electrode material 111, and a gelled negative electrode electrolyte 121 is applied on a negative electrode active material 118 of a negative electrode material 112. Of course, the cathode electrolyte 120 and the anode electrolyte 12
1 is made of the same material. As shown in FIG. 17, the separator-wound polymer secondary battery 110 has a large capacity by winding the positive electrode material 111 and the negative electrode material 112 in a multilayer by forming a winding core portion by the starting end thereof as shown in FIG. Is being planned. The positive electrode electrolyte 12
0 and the negative electrode electrolyte 121, the porous separator 11
3, an electric field action between the positive electrode material 111 and the negative electrode material 112 is achieved.

The coreless wound polymer secondary battery 130 is
As compared with the above-described separator wound type polymer secondary battery 110, a positive electrode material 132 and a negative electrode material 133 are spirally wound around the outer periphery of a core 131 without using a separator 113. The core 131 has a pair of cores 131a and 131b having a substantially wedge-shaped cross section as shown in FIG.
The positive electrode material 132 and the negative electrode material 133 are wound with a predetermined tension around the outer periphery thereof by being rotated by a drive mechanism (not shown).

The positive electrode material 132 includes a positive electrode current collector 134 made of a band-shaped film material such as an aluminum foil and the like, and a positive electrode active material 135 applied on the main surface of the positive electrode current collector 134. And a gelled positive electrode electrolyte 136 applied on the positive electrode active material 135 and the positive electrode current collector 134.
Consists of In the positive electrode material 132, a positive electrode external terminal 137 is joined to a positive electrode current collector 134 at the innermost periphery. The negative electrode material 133 is formed of a negative electrode current collector 138 made of a band-shaped film material such as a copper foil, a negative electrode active material 139 applied on the main surface of the negative electrode current collector 138, and applied on the negative electrode active material 139. And a gelled negative electrode electrolyte 140. Negative electrode material 133
In addition, the negative electrode external terminal 14 is
1 are joined. Coreless wound type polymer secondary battery 1
In 30, the volume energy density is improved because the positive electrode material 132 and the negative electrode material 133 are wound at a high density.

[0012]

By the way, in the stack type polymer secondary battery 100 described above, the positive electrode material 10
1 and the negative electrode material 102 are formed by press working,
It is difficult to perform high-precision processing.
There is a problem that it is difficult to accurately position the first and the negative electrode material 102 on a flat plate. Further, the stack type polymer secondary battery 100 includes a positive electrode material 101 and a negative electrode material 10.
2, the positive electrode terminal member and the negative electrode terminal member are connected by current collecting welding, however, there is a problem that it is difficult to connect with high accuracy. Therefore, the stack-type polymer secondary battery 100 has a problem that yield and mass productivity are poor.

Further, a separator wound type polymer secondary battery 1
10 can be diverted to the manufacturing process of the lithium ion secondary battery using the liquid electrolyte as described above,
There is a problem that the productivity of the porous separator 113 that allows lithium ions to pass through is poor and relatively expensive. The separator-wound polymer secondary battery 110 uses the separator 113 to form the positive electrode material 11 by the thickness of the separator 113.
The distance between the electrodes 1 and the negative electrode material 112 increases.

A separator wound type polymer secondary battery 110
In order to reduce the gap between the electrodes, it is necessary to apply a thin gel-like positive electrode electrolyte 120 and a negative electrode electrolyte 121 to the positive electrode material 111 and the negative electrode material 112, respectively. However, the cathode electrolyte 120 and the anode electrolyte 1
Since No. 21 has a high viscosity, it is extremely difficult to apply it uniformly with a thickness of 20 μm or less, and there is a problem that yield and productivity are poor.

Further, a coreless wound type polymer secondary battery 1
30 also has excellent volume energy density characteristics as described above, but the positive electrode electrolyte 136 and the negative electrode electrolyte 140 adhere to the core 131. For this reason, the coreless wound polymer secondary battery 130 has a problem that the positive electrode electrolyte 136 or the negative electrode electrolyte 140 is peeled and damaged, and an internal short circuit occurs. Further, in the coreless wound polymer secondary battery 130, since the electrolyte salt is mixed in the positive electrode electrolyte 136 or the negative electrode electrolyte 140, the core 131 and the like are corroded by the adhesion, and the durability of the manufacturing apparatus is deteriorated. There was a problem.

In a polymer secondary battery, a polar active material is intermittently applied to a current collector except for a terminal connection portion in order to connect a terminal member to a positive electrode material or a negative electrode material. You. In a polymer secondary battery, a coating start portion and a coating end portion of a polar active material are not smoothly formed, and a jump occurs, thereby causing a so-called mix jump. The polymer secondary battery has a problem that the gel electrolyte is pierced due to the mixing jump and an internal short circuit occurs.

Accordingly, the present invention has been proposed for the purpose of providing a high performance lithium ion polymer secondary battery with improved productivity and reliability. In addition, the present invention has been proposed for the purpose of providing a lithium ion polymer secondary battery manufacturing apparatus and a manufacturing method thereof for efficiently and at low cost manufacturing a high precision and high performance lithium ion polymer secondary battery. Things.

[0018]

According to the present invention, there is provided a lithium ion secondary battery according to the present invention, which comprises a negative electrode material and a positive electrode material each formed by applying a polar active material and a gel electrolyte to a belt-shaped current collector. The material is wound in a state of being superimposed on the outer periphery of a film-shaped core material as a core. In addition, in the lithium ion polymer secondary battery, the negative electrode material and the positive electrode material are arranged on the outer peripheral portion of the belt-like current collector such that the core material is interposed between a portion where the polar active material is applied to the current collector and an uncoated portion. It is wound in a superposed state.

According to the lithium ion polymer secondary battery of the present invention having the above-described structure, the negative electrode material and the positive electrode material are wound in a superposed state with the core material as the core, so that the winding shaft is formed. The gel electrolyte does not adhere to the surface of the substrate, and the damage of the inner peripheral portion due to the adhered gel electrolyte is suppressed, and the durability of the device is improved. Lithium-ion polymer secondary batteries use a core material interposed between the part where the polar active material is applied and the part where the polar active material is not applied. The occurrence of an internal short circuit due to the slit burr is suppressed.

The apparatus for manufacturing a lithium ion polymer secondary battery according to the present invention, which achieves the above object, comprises a negative electrode for supplying a negative electrode material obtained by applying a negative electrode active material and a gel electrolyte to a belt-like negative electrode current collector. A material supply mechanism, a positive electrode material supply mechanism that supplies a positive electrode material obtained by applying a positive electrode active material and a gel electrolyte to a belt-shaped positive electrode current collector, and a core supply mechanism that supplies a core material made of a film material, An electrode material having a winding shaft for winding a core material supplied from a core supply mechanism, a negative electrode material supplied from a negative electrode material supply mechanism, and a positive electrode material supplied from a positive electrode material supply mechanism in an outer peripheral portion in a superposed state. A winding mechanism.

According to the manufacturing apparatus for a lithium ion polymer secondary battery according to the present invention, the winding shaft of the electrode material winding mechanism is cut into a predetermined length on the outer peripheral portion. While the core material is wound, the negative electrode material and the positive electrode material are wound around the outer periphery of the core material in a stacked state. In the manufacturing apparatus of the lithium ion polymer secondary battery, the negative electrode material or the positive electrode material is not directly wound around the winding shaft, so that the gel electrolyte does not adhere. Therefore, the manufacturing apparatus of the lithium ion polymer secondary battery causes damage to the inner peripheral portion due to the adhesive force of the gel electrolyte when removing the lithium ion polymer secondary battery from the winding shaft after the winding operation of the electrode material is completed. Nevertheless, a highly reliable lithium-ion polymer secondary battery is manufactured. Further, in the manufacturing apparatus of the lithium ion polymer secondary battery, the wound shaft and the like are not corroded by the attached gel electrolyte and the durability is not deteriorated.

The apparatus for manufacturing a lithium-ion polymer secondary battery is characterized in that the core material is interposed between a portion where the positive electrode active material of each of the negative electrode material and the positive electrode material is applied and an uncoated portion thereof. Since the positive electrode material and the negative electrode material are wound around the outer periphery in a superposed state, the occurrence of mix shortage of the pole active material generated at the starting end of the negative electrode material and the positive electrode material and the occurrence of internal short circuit due to the slit burr of the electrode terminal To efficiently manufacture a highly accurate and highly reliable lithium ion polymer secondary battery with reduced power consumption.

Further, in the method for producing a lithium ion polymer secondary battery according to the present invention for achieving the above-mentioned object, an electrode material winding device having a winding shaft is used. A negative electrode material obtained by applying a negative electrode active material and a gel electrolyte to a negative electrode current collector; a positive electrode material obtained by applying a positive electrode active material and a gel electrolyte to a belt-shaped positive electrode current collector; and a film-shaped core Material, and a core material cut to a predetermined length is wound around an outer peripheral portion of the winding shaft, and a negative electrode material and a positive electrode material are wound around the outer peripheral portion of the core material in a superposed state, thereby forming lithium. Manufactures ion polymer secondary batteries. Also,
In a method for manufacturing a lithium ion polymer secondary battery,
The core material is coated with the negative electrode active material and the positive electrode active material on the strip-shaped negative electrode current collector and the positive electrode current collector of the negative electrode material and the positive electrode material in a state where the tip is wound around the winding shaft of the electrode material winding device. It is cut to a length shorter than the non-coated active material.

Therefore, according to the method for producing a lithium ion polymer secondary battery according to the present invention, the negative electrode material or the positive electrode material is not directly wound around the winding shaft, so that the gel electrolyte does not adhere to the winding shaft, and the electrode material does not adhere. When the lithium ion polymer secondary battery is removed from the winding shaft after the winding operation of the lithium ion polymer is removed, there is no inconvenience such as damage to the inner periphery caused by the adhesive force of the gel electrolyte, and the lithium ion polymer has high reliability. Manufacture secondary batteries.

Further, the method for producing a lithium ion polymer secondary battery is characterized in that the core material is interposed between a portion where the positive active material of each of the negative electrode material and the positive electrode material is applied and a portion where the active material is not applied. Since the positive electrode material and the negative electrode material are wound around the outer periphery in a superposed state, the occurrence of mix shortage of the pole active material generated at the starting end of the negative electrode material and the positive electrode material and the occurrence of internal short circuit due to the slit burr of the electrode terminal Thus, a highly accurate and highly reliable lithium ion polymer secondary battery in which the occurrence is suppressed is efficiently manufactured.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described in detail. The polymer secondary battery 1 shown in the embodiment is manufactured by a polymer secondary battery manufacturing apparatus 20 described in detail later. Polymer secondary battery 1
As shown in FIG. 1, a positive electrode material 3 and a negative electrode material 4 are wound around an outer peripheral portion of a core material 2 as a core. The core material 2 is made of a polypropylene (PP) film, a polyethylene (PE) film, or another polyolefin-based polymer resin film.
A band-shaped material having substantially the same width as that of the negative electrode material 4 is used.

The core material 2 is cut into a predetermined length in a polymer secondary battery manufacturing apparatus 20, as will be described in detail later.
The core material 2 is a material equivalent to that of the separator of the separator wound type polymer secondary battery, but does not need to have a function of allowing lithium ions to pass therethrough, and thus may not be porous and inexpensive. As shown in FIG. 1, a pair of the core members 2 is used so as to be located at the innermost peripheral portions of the winding start ends 3a and 4a of the positive electrode member 3 and the negative electrode member 4, respectively. The tip ends of the pair of core members 2a and 2b abut each other.

The positive electrode material 3 includes a positive electrode current collector 5 made of a strip-shaped film material such as an aluminum foil, a positive electrode active material 6 formed on both surfaces of the positive electrode current collector 5, It comprises a gelled positive electrode electrolyte 7 applied on the surface of the positive electrode current collector 5. The positive electrode material 3 is cut at a predetermined position in the polymer secondary battery manufacturing apparatus 20 as described in detail later, and is wound around the outer periphery of the core material 2 by a predetermined length as a winding start end 3a. You.

The positive electrode active material 6 is made of, for example, lithium nickel oxide (LiNiO ₂ ), lithium cobalt oxide (LiCoO ₂ ) or lithium manganese oxide (Li
Mn ₂ O ₄ ) or the like is used. The positive electrode active material 6 is formed by mixing a conductive material such as carbon, a binder, and a solvent with these materials, and uniformly applying the mixture on the positive electrode current collector 5. The transition metal element is not limited to one kind. For example, LiNiO
Two or more types such as _0.5 Co _0.5 O ₂ can be used.

The positive electrode active material 6 is made of, for example, polyvinylidene fluoride (PVdF) as a binder and n as a solvent.
-Methylpyrrolidone (NMP) is used. The positive electrode active material 6 is formed into a slurry by mixing these materials, and is uniformly applied onto the positive electrode current collector 5 by, for example, a doctor blade method. The positive electrode active material 6 is NM
The P is skipped, and a pressure treatment by a roll press is performed to increase the density, and a film is formed on the positive electrode current collector 5.

The positive electrode electrolyte 7 is formed by mixing a polymer material, an electrolytic solution and an electrolyte salt to form a gel. The cathode electrolyte 7 only needs to be in a state in which the electrolyte is dispersed in the polymer matrix, and there is no particular limitation on the amount of the electrolyte. The polymer material has a property of being compatible with the electrolytic solution. For example, polyacrylonitrile (PAN), polyether polymer, PVd
F, styrene butadiene rubber or the like is used. The electrolytic solution is capable of dispersing a polymer material, and as an aprotic solvent, for example, ethylene carbonate (EC), propylene carbonate (PC), or butylene carbonate (B)
C) and the like are used. The solvent may be used alone or in combination of two or more.

As the electrolyte salt, one that is compatible with the solvent is used, and a combination of a cation and an anion is used. As the cation, an alkali metal or an alkaline earth metal is used. The anion, Cl ^over, Br ^over, I ^{chromatography,} SC
^N-, ClO ₄ ^over, BF ₄ ^over, PF ₆ ^{chromatography,} CF ₃ SO ₃ ^over, etc. are used. Examples of the electrolyte salt include lithium hexafluorophosphate and lithium tetrafluoroborate, as long as the electrolyte salt can be dissolved in the electrolyte.

As shown in FIG. 1, the positive electrode material 3 has a predetermined length from the winding start end 3a, which is the start end when the polymer secondary battery manufacturing apparatus 20 is wound around the outer periphery of the core material 2 as described later. The region is constituted as a positive electrode active material non-applied portion 8 in which the positive electrode active material 6 is not applied on the surface of the positive electrode current collector 5. A positive electrode terminal member 9 is joined to the positive electrode material 3 at a winding start end 3a. As the positive electrode terminal member 9, for example, a metal wire such as aluminum or nickel woven in a mesh shape is used. The positive electrode terminal member 9 is drawn out from the innermost peripheral portion.

The negative electrode material 4 includes a negative electrode current collector 10 made of a strip-shaped film material such as a copper foil, a negative electrode active material 11 formed on both surfaces of the negative electrode current collector 10, It comprises a gelled negative electrode electrolyte 12 applied on the surface of the negative electrode current collector 10. The negative electrode material 4 is cut at a predetermined position in the polymer secondary battery manufacturing apparatus 20 as described in detail later, and is wound around the outer periphery of the core material 2 by a predetermined length as a winding start end 4a. You.

As the negative electrode active material 11, a carbon material such as graphite, non-graphitizable carbon, or graphitizable carbon is used. The negative electrode active material 11 is formed into a slurry by adding PYdF as a binder and NMP as a solvent to the carbon material, and is uniformly applied on the negative electrode current collector 10 by, for example, a doctor blade method. The negative electrode active material 11 is subjected to a high-temperature drying treatment to remove NMP, and further subjected to a pressure treatment by a roll press to achieve a high density, thereby forming a film on the negative electrode current collector 10. The negative electrode electrolyte 12
Is the same as the positive electrode electrolyte 7 described above, and the description thereof is omitted.

As shown in FIG. 1, the negative electrode material 4 has a predetermined length from a winding start end 4a which is a start end when the negative electrode material 4 is wound around the outer peripheral portion of the core material 2 by a polymer secondary battery manufacturing apparatus 20 described later. The negative electrode active material 11 is formed on the surface of the negative electrode current collector 10.
Are applied as the negative electrode active material non-applied portions 13 to which no is applied. A negative electrode terminal member 14 is joined to the negative electrode material 4 at a winding start end 4a. Negative electrode terminal member 14
For example, a metal wire such as copper or nickel woven in a mesh shape is used. The negative electrode terminal member 14 is drawn out from the innermost peripheral portion.

As shown in FIG. 1, the polymer secondary battery 1 has one of the core members 2a as a core, the above-described positive electrode member 3 is spirally wound clockwise, and the other core member 2b is a core. The negative electrode material 4 described above is spirally wound counterclockwise. In the polymer secondary battery 1, the core material 2 a is located on the inner peripheral portion of the positive electrode active material non-applied portion 8 with respect to the positive electrode material 3 and covers the positive electrode terminal member 9. Core material 2
a is a state in which the front end of the positive electrode material 3 is covered.
Similarly, the polymer secondary battery 1 is in a state in which the core material 2 b is located on the inner peripheral portion of the negative electrode active material non-applied portion 13 with respect to the negative electrode material 4 and covers the negative electrode terminal member 14. Core material 2
b shows a state in which the tip of the negative electrode material 4 is covered.

The polymer secondary battery 1 configured as described above
Since the positive electrode terminal member 9 and the negative electrode terminal member 14 are covered with the core member 2, occurrence of an internal short circuit between the positive electrode member 3 and the negative electrode member 4 due to slit burrs or the like of these terminal members is suppressed. In the polymer secondary battery 1, since the tips of the positive electrode material 3 and the negative electrode material 4 are covered with the core material 2, an internal short-circuit between the positive electrode material 3 and the negative electrode material 4 due to burrs or the like generated when these are cut off. Generation is suppressed.

The positive electrode member 3 and the negative electrode member 4 are respectively provided with a positive terminal member 9 and a negative terminal member 1 at winding start ends 3a and 4a.
The positive electrode active material non-applied portion 8 and the negative electrode active material non-applied portion 13 are respectively formed to join the four. In the positive electrode material 3 and the negative electrode material 4, a mix jump or the like occurs in the positive electrode active material non-coated portion 8 and the negative electrode active material non-coated portion 13. Since the polymer secondary battery 1 covers the positive electrode active material non-coated portion 8 and the negative electrode active material non-coated portion 13 with the core material 2,
The occurrence of an internal short due to a mix jump is suppressed.

In the polymer secondary battery 1, the core material 2 is
And a length sufficient to constitute the core of the anode material 4.
Therefore, the polymer secondary battery 1 includes the positive electrode material 3 and the negative electrode material 4.
A sufficient battery area is provided in which the areas where the polar active materials 6, 11 and the electrolytes 7, 12 are respectively applied to the current collectors 5, 10 are overlapped. Since the polymer secondary battery 1 does not have the core material 2 in this battery area, the interval between the positive electrode material 3 and the negative electrode material 4 is smaller than that in the case where the separator is interposed. The polymer secondary battery 1 includes a positive electrode material 3 and a negative electrode material 4.
The electrolytes 7 and 12 may be formed to a thickness of about 30 to 40 microns with respect to the current collectors 5 and 10. Therefore, in the polymer secondary battery 1, the process of applying the electrolytes 7, 12 to the current collectors 5, 10 of the positive electrode material 3 and the negative electrode material 4 can be performed easily and with high accuracy, so that productivity and reliability are improved. It will be planned.

The polymer secondary battery 1 is manufactured by a polymer secondary battery manufacturing apparatus 20 whose schematic structure is shown in FIGS. The polymer secondary battery manufacturing apparatus 20 includes a core material supply unit 22, a positive electrode material supply unit 23, a negative electrode material supply unit 24, and a winding unit 25, which are provided on the device base 21.
And so on. The polymer secondary battery manufacturing apparatus 20 includes a core material 2 supplied from a core material supply unit 22.
A positive electrode material 3 supplied from a positive electrode material supply unit 23 and a negative electrode material 4 supplied from a negative electrode material supply unit 24;
, A winding operation described later is performed to manufacture the polymer secondary battery 1.

The core material supply section 22 is provided with a core material supply shaft 26 provided substantially below the center of the equipment base 21 in FIG.
And a core material supply roll 27 around which a core material 2 cut to a predetermined width is wound. The core material supply unit 22 includes:
A core material dancer roller mechanism 28 for applying a predetermined running tension to the core material 2 fed from the core material supply roll 27, and a supply operation of the core material 2 to a winding unit 25 described later and a predetermined length. A core material supply control mechanism 29 for adjusting and cutting is provided.

The positive electrode material supply section 23 is arranged in the right area of the device base 21 in FIG.
Positive electrode material supply roll 3 wound with positive electrode material 3 with 0 inserted
1, a positive electrode material supply shaft 32, a positive electrode material supply mechanism 33 for separating and releasing the release paper 30 and the positive electrode material 3 from the positive electrode material supply roll 31, and a predetermined winding of the separated release paper 30 And a release paper take-up roll 35 that takes up via a release paper dancer roller mechanism 34 for applying tension. Further, the positive electrode material supply unit 23 includes a traveling guide mechanism 36 including a plurality of guide rollers and the like for guiding the fed positive electrode material 3 to the winding unit 25, and a positive electrode material 3
And a positive electrode material dancer roller mechanism 37 for applying a predetermined running tension to the motor.

The negative electrode material supply section 24 is disposed in the left area of the device base 21 in FIG.
Negative electrode material supply roll 3 around which negative electrode material 4 with inserted 8 is wound
A negative electrode material supply shaft 40 on which the sheet 9 is mounted, a negative electrode material supply mechanism 41 for separating and releasing the release paper 38 and the negative electrode material 4 from the negative electrode material supply roll 39, and winding the separated release paper 38 into a predetermined shape And a release paper take-up roll 43 that takes up a release paper dancer roller mechanism 42 for applying tension. The negative electrode material supply unit 24 includes a traveling guide mechanism 44 including a plurality of guide rollers and the like for guiding the fed negative electrode material 4 to the winding unit 25, and a negative electrode material that applies a predetermined traveling tension to the negative electrode material 4. Dancer roller mechanism 4
5 is provided.

The winding unit 25 is disposed at the upper center of the equipment base 21 in FIG. 2, and is driven by a rotation driving mechanism (not shown) to rotate, and is operated around the circumferential orbit L by a winding shaft 46. A winding core member 47 attached to the tip of the winding shaft 46, a winding roller mechanism 48, a nip roller mechanism 49, and the like are provided. The winding unit 25 mounts the above-described units on the rotating base 50. The winding member 25 includes a core material 2 on the outer periphery of the rotating base 50.
Core material supply guide mechanism 51 and core material cutter mechanism 52
And a cathode material supply guide mechanism 53 and a cathode material cutter mechanism 54 for the cathode material 3 and an anode material supply guide mechanism 55 and an anode material cutter mechanism 56 for the anode material 4 are mounted on the drive unit UT. It is arranged.

The drive unit UT switches the positive electrode material supply guide mechanism 53 and the negative electrode material supply guide mechanism 55 in the horizontal direction in FIG. The supply guide mechanisms 53 and 55 are thereby selectively positioned corresponding to the core member 47. The winding section 25 has an upper position in FIG. 2 as a standby position for a winding operation described later, and a nip roller mechanism 49 is arranged at this standby position. Further, the supply guide mechanisms 53 and 55 are located at equal intervals with respect to the core member 47 in the standby position.

As shown in FIG. 3, the core member 47 is formed by combining a pair of members 47a and 47b each having a substantially wedge shape, and has a substantially spindle shape as a whole. The core member 47 includes
As will be described later in detail, a predetermined amount of core material 2
Is wound in a state where the positive electrode material 3 and the negative electrode material 4 are overlapped with each other.

The take-up roller mechanism 48 is circulated on the circumferential orbit L corresponding to the take-up shaft 46, and the take-up roller 58 is rotatably supported by an L-shaped bracket member 57. . The winding roller mechanism 48 has a bracket member 57 oscillated by a drive mechanism (not shown) so that the winding roller 58 moves toward and away from the core member 47 as described in detail below. The take-up roller mechanism 48
As will be described later, the core member 2 is hung on the outer peripheral portion of the winding roller 58 and guided to the outer peripheral portion of the core member 47. The winding roller mechanism 48 includes the positive electrode material supply guide mechanism 5.
The positive electrode material 3 supplied from 3 is wound around the outer periphery of the core member 47. The winding roller mechanism 48 has an operation of winding the negative electrode material 4 supplied from the negative electrode material supply guide mechanism 55 around the outer periphery of the core member 47.

The nip roller mechanism 49 includes a cylinder 59
And a nip roller 60 and the like, and are arranged at a position facing the winding roller mechanism 48 with respect to the core member 47 as shown in FIG. Nip roller mechanism 49
Moves the nip roller 60 toward and away from the core member 47 by operating the cylinder 59. The nip roller mechanism 49 has an effect of causing the positive electrode material 3 supplied from the positive electrode material supply guide mechanism 53 to be wound around the outer peripheral portion of the core member 47. The nip roller mechanism 49 has an effect of causing the negative electrode material 4 supplied from the negative electrode material supply guide mechanism 55 to be wound around the outer periphery of the core member 47.

The core material supply guide mechanism 51 includes a plurality of guide rollers, a movable tension roller (not shown), and the like, and runs to the core member 47 with a predetermined tension applied to the core material 2. Let me guide you. The core material supply guide mechanism 51 includes a guide plate 61 disposed corresponding to a core material cutter mechanism 52 described later.

The core material cutter mechanism 52 is located at the standby position of the winding section 25 as shown in FIG. The core material cutter mechanism 52 includes a nip roller 62 facing the guide plate 61 of the core material supply guide mechanism 51 as shown in the figure, and a cylinder 63 for moving the nip roller 62 toward and away from the guide plate 61.
And a member such as a cutter 64 driven by a cylinder 63 together with the nip roller 62.

The core member cutter mechanism 52 guides the nip roller 62 and the cutter 64 by operating the cylinder 63 when the core member 2 is wound around the core member 47 by a predetermined length as described later. It is moved to the plate 61 side. The core material cutter mechanism 52 cuts the core material 2 by the cutter 64 in a state where the core material 2 is sandwiched between the nip roller 62 and the guide plate 61.

The positive electrode material supply guide mechanism 53 is composed of members such as a guide roller 65 and a positive electrode material gripper member 66, and is disposed at the standby position on the right side above the core member 47. Positive electrode material supply guide mechanism 5
3 is switched between the standby position and the position above the core member 47 by the drive unit UT as described above. The positive electrode material gripper 66 is moved toward and away from the guide roller 65 by a drive mechanism (not shown), and is slid in the supply direction. The positive-electrode material supply guide mechanism 53 slides the positive-electrode material 3 in a state where the positive-electrode material gripper 66 is operated to slide the positive-electrode material 3 between the guide roller 65 and the core member 47 as described later. To the outer peripheral portion.

The positive electrode material cutter mechanism 54 is disposed between the positive electrode material supply guide mechanism 53 and the core member 47, and is constituted by members such as a cutter and a press plate, although details are omitted. The positive electrode material cutter mechanism 54 includes the core member 4.
It is driven when a predetermined amount of winding operation of the positive electrode material 3 is performed on 7, and cuts the positive electrode material 3. In this case, the positive electrode material cutter mechanism 54 is controlled based on the supply operation of the positive electrode material supply unit 23, and performs the operation of cutting the positive electrode material 3 at the positive electrode active material non-applied portion 8 of the positive electrode material 3.

The negative electrode material supply guide mechanism 55 is composed of members such as a guide roller 67 and a negative electrode material gripper member 68, and is located at the standby position on the upper left side of the core member 47. Anode material supply guide mechanism 5
5 is switched between the standby position and the position above the core member 47 by the drive unit UT as described above. The negative electrode material gripper 68 is moved toward and away from the guide roller 67 by a drive mechanism (not shown), and is slid in the supply direction. The negative electrode material supply guide mechanism 55 slides the negative electrode material 4 with the core member 47 by operating the negative electrode material gripper 68 and sliding the negative electrode material 4 with the guide roller 67 as described later. To the outer peripheral portion.

The negative electrode material cutter mechanism 56 is disposed between the negative electrode material supply guide mechanism 55 and the core member 47, and is constituted by members such as a cutter and a press plate, although details are omitted. The negative electrode material cutter mechanism 56 includes the core member 4.
When the winding operation of the predetermined amount of the negative electrode material 4 is performed with respect to 7, it is driven to cut the negative electrode material 4. In this case, the negative electrode material cutter mechanism 56 is controlled based on the supply operation of the negative electrode material supply unit 24, and performs a cutting operation of the negative electrode material 4 at the active material non-applied portion 13 of the negative electrode material 4.

In the polymer secondary battery manufacturing apparatus 20 configured as described above, the core material supply roll 27 is set on the core material supply shaft 26 of the core material supply unit 22 and is pulled out from the core material supply roll 27. The core material 2 is loaded onto the core material supply guide mechanism 51 via the core material dancer roll mechanism 28 and the core material supply control mechanism 29. In the polymer secondary battery manufacturing apparatus 20, the positive electrode material supply unit 2
The positive electrode material supply roll 31 is set on the positive electrode material supply shaft 32 of No. 3, and the positive electrode material 3 drawn from the positive electrode material supply roll 31 is loaded into the positive electrode material supply mechanism 33.

The release material 30 is peeled off from the positive electrode material 3 in the positive electrode material supply mechanism 33, and the positive electrode material supply guide mechanism 53 is passed through the traveling guide mechanism 36 and the positive electrode material dancer roll mechanism 37.
Will be loaded. The release paper 30 is separated from the positive electrode material 3 in the positive electrode material supply mechanism 33 and is loaded on the release paper take-up roll 35 via the release paper dancer roll mechanism 37.

In the apparatus 20 for manufacturing a polymer secondary battery,
A negative electrode material supply roll 39 is set on the negative electrode material supply shaft 40 of the negative electrode material supply part 24, and the negative electrode material 4 drawn from the negative electrode material supply roll 39 is loaded into the negative electrode material supply mechanism 41. The release material 38 of the negative electrode material 4 is peeled off in the negative electrode material supply mechanism 41, and the negative electrode material supply guide mechanism 55 passes through the travel guide mechanism 44 and the negative electrode material dancer roll mechanism 45.
Will be loaded. The release paper 38 is separated from the negative electrode material 4 in the negative electrode material supply mechanism 41 and is loaded on the release paper take-up roll 43 via the release paper dancer roll mechanism 42.

In the apparatus 20 for producing a polymer secondary battery,
The core material 2 is fed out from the core material supply guide mechanism 51 and wound around the core member 47 by a predetermined amount. In the polymer secondary battery manufacturing apparatus 20, the winding shaft 46 is driven to rotate, and the positive electrode material supply guide mechanism 53 supplies the positive electrode material 3.
And the negative electrode material 4 is fed from the negative electrode material supply guide mechanism 55. In the polymer secondary battery manufacturing apparatus 20, winding start ends 3a, 3b of the positive electrode material 3 or the negative electrode material 4 are formed.
The cutting operation of the core material 2 is performed in conjunction with the winding operation. In the polymer secondary battery manufacturing apparatus 20, the core material 2 constitutes a winding core in the range of the winding start ends 3a and 3b of the positive electrode material 3 or the negative electrode material 4, and the positive electrode material 3 and the negative electrode material 4 overlap each other. It is sequentially wound around the outer periphery in this state.

In the polymer secondary battery manufacturing apparatus 20,
When a predetermined amount of winding operation of the positive electrode material 3 and the negative electrode material 4 is completed, the rotation operation of the winding shaft 46 ends. In the polymer secondary battery manufacturing apparatus 20, the positive electrode material cutter mechanism 54 and the negative electrode material cutter mechanism 56 operate to cut the positive electrode material 3 and the negative electrode material 4. The polymer secondary battery 10 manufactured from the core member 47 of the winding unit 25 is taken out of the polymer secondary battery manufacturing device 20.

The polymer secondary battery manufacturing apparatus 20 uses the core material 2 as a core through the above-described steps to form a positive electrode material 3
And a negative electrode material 4 are wound in a superposed state to produce a polymer secondary battery 10. Polymer secondary battery manufacturing equipment 20
The core material 2 is located on the inner periphery of the positive electrode active material non-coated portion 8 and the negative electrode active material non-coated portion 13 with respect to the positive electrode material 3 and the negative electrode material 4, respectively.
4 is manufactured.

Therefore, the polymer secondary battery manufacturing apparatus 20
The positive electrode terminal member 9 and the negative electrode terminal member 1 depend on the core material 2.
4 to produce a highly reliable polymer secondary battery 1 in which the occurrence of an internal short circuit between the positive electrode material 3 and the negative electrode material 4 due to slit burrs or the like is suppressed. The polymer secondary battery manufacturing apparatus 20 covers the inside of the positive electrode material 3 and the negative electrode material 4 due to burrs and the like generated at the time of cutting the ends of the positive electrode terminal member 9 and the negative electrode terminal member 14 with the core material 2. Highly reliable polymer secondary battery 1 in which short circuit is suppressed.
To manufacture. The polymer secondary battery manufacturing apparatus 20 includes the core material 2
The positive electrode active material uncoated portion 8 of the positive electrode material 3 and the negative electrode material 4
In addition, the highly reliable polymer secondary battery 1 which covers the non-applied portion 13 of the negative electrode active material and suppresses the occurrence of an internal short circuit caused by a mix jump generated in these portions is manufactured.

Since the polymer secondary battery manufacturing apparatus 20 does not require a relatively expensive separator, it manufactures the polymer secondary battery 1 whose cost is reduced. Since the core material 2 exists only in the core portion of the positive electrode material 3 and the negative electrode material 4, the polymer secondary battery manufacturing apparatus 20 applies the electrolytes 7 and 12 to the current collectors 5 and 10 by 30 μm to 40 μm. Positive electrode material 3 with relatively easy and high-precision policy with a thickness of about 3
And the negative electrode material 4 can be used to manufacture the polymer secondary battery 1 in which productivity and reliability are improved and cost is reduced.

The polymer secondary battery manufacturing apparatus 20 has a structure in which the core material 2 is wound around the core member 47 and the positive electrode material 3
And the negative electrode material 4 are wound in a superposed state,
Adhesion of the gelled positive electrode electrolyte 7 and the gelled negative electrode electrolyte 12 having high viscosity to the core member 47 and other parts is suppressed.
Therefore, the polymer secondary battery manufacturing apparatus 20 uses the adhesive force of the gelled positive electrode electrolyte 7 and the gelled negative electrode electrolyte 12 attached when the polymer secondary battery 1 is detached from the core member 47 to form the positive electrode material 3 and the negative electrode material 4. A highly reliable polymer secondary battery 1 whose inner peripheral portion is not damaged is manufactured with high yield.
In the polymer secondary battery manufacturing apparatus 20, the occurrence of corrosion and the like due to the electrolyte salt contained in the gelled positive electrode electrolyte 7 and the gelled negative electrode electrolyte 12 attached to each part is suppressed, and the durability is improved.

With respect to a specific manufacturing process of the polymer secondary battery 1 using the above-described polymer secondary battery manufacturing apparatus 20, the operation form of each part in the winding unit 25 shown in FIGS. 4 to 15 will be described below. This will be described in detail.

In the polymer secondary battery manufacturing apparatus 20, the core member 2 is guided by the winding roller 58 of the winding roller mechanism 48 in the standby position shown in FIG.
In a state of being wound around the outer peripheral portion of the. The winding core member 47 is in an unspecified posture, and is at a position where the winding roller 58 and the nipple roller 60 of the nipple roller mechanism 49 are separated. The leading end of the positive electrode material 3 is sandwiched between the guide roller 65 of the positive electrode material supply guide mechanism 53 and the positive electrode material gripper member 66. Similarly, the negative electrode material 4
Also, the leading end portion is held between the guide roller 67 of the negative electrode material supply guide mechanism 55 and the negative electrode material gripper member 68. The core member 47 includes a positive electrode material supply guide mechanism 53.
And the negative electrode material supply guide mechanism 55.

In the apparatus 20 for manufacturing a polymer secondary battery,
With the start of the winding operation, the drive unit UT operates to move the negative electrode material supply guide mechanism 55 to a position corresponding to the winding core member 47. The negative electrode material supply guide mechanism 55 moves down to the core member 47 side as shown by the arrow in FIG. 5 with the negative electrode material gripper member 68 sandwiching the negative electrode material 4 between the guide roller 67 and the negative electrode material gripper member 68. The negative electrode material 4 includes the negative electrode material gripper member 6.
By the operation 8, the leading end is sent out to the outer peripheral portion of the core member 47.

In the polymer secondary battery manufacturing apparatus 20,
In the next step, the delivery operation of the negative electrode material 4 and the winding operation of the core member 47 are performed as shown in FIG. The winding core member 47 is in an unspecified posture as described above, and is adjusted and rotated by the adjusting operation of the winding shaft 46 as shown by the arrow in FIG. Core angle adjustment is performed.

In the polymer secondary battery manufacturing apparatus 20,
Next, the winding roller mechanism 48 and the nipple roller mechanism 49 are operated. The winding roller mechanism 48 causes the winding roller 58 to abut on the outer peripheral portion of the winding core member 47 as shown by the arrow in FIG. In this state, the winding roller 58 presses and holds the winding start end 4 a of the negative electrode material 4 against the outer peripheral portion of the core member 47. The nipple roller mechanism 49 similarly causes the nipple roller 60 to contact the outer peripheral portion of the core member 47.

In the polymer secondary battery manufacturing apparatus 20,
The operation of the negative electrode material gripper member 68 of the negative electrode material supply mechanism 55 is performed. The negative electrode material gripper member 68 moves in a direction away from the guide roller 67 as shown by an arrow in FIG. 6C in a state where the negative electrode material 4 is held by the core member 47 and the winding roller 58. Polymer secondary battery manufacturing equipment 20
Then, an operation of returning the negative electrode material gripper member 68 to the standby position is performed as shown by the arrow (D) in FIG. The negative electrode material supply guide mechanism 55 returns to the standby position when the drive unit UT is operated.

In the apparatus 20 for producing a polymer secondary battery,
The core material cutter mechanism 52 is driven, and the cutting operation of the core material 2 is performed by the cutter 64 as shown in FIG. The core material 2 is cut by the core material cutter mechanism 52 so that its length is within the range of the length of the negative electrode active material-uncoated portion 13 of the negative electrode material 4.

In the apparatus 20 for producing a polymer secondary battery,
When the winding shaft 46 is driven, the core member 47 rotates counterclockwise as indicated by the arrow in FIG. The core member 2 and the negative electrode material 4 are wound around the core member 47 in a state where the core member 2 and the negative electrode material 4 overlap each other. As described above, since the core material 2 is wound on the outer peripheral portion of the core member 47 first, the negative electrode material 4 does not come into direct contact with the core material 47. It will be wound around the outer periphery.
Therefore, in the polymer secondary battery manufacturing apparatus 20,
Adhesion of the negative electrode electrolyte 12 of the negative electrode material 4 to the core member 47 is suppressed.

In the polymer secondary battery manufacturing apparatus 20,
In the next step, the feeding operation of the positive electrode material 3 and the winding operation of the core member 47 are performed as shown in FIG. In the polymer secondary battery manufacturing apparatus 20, the operation of the drive unit UT positions the positive electrode material supply guide mechanism 53 above the core member 47 and the operation of the winding roller mechanism 48 as shown in FIG. An operation of separating the winding roller 58 from the core member 47 is performed. Further, in the polymer secondary battery manufacturing apparatus 20, the positive electrode material gripper member 66 is operated by operating the positive electrode material supply guide mechanism 53.
As shown by the arrow in the figure, an operation of lowering the positive electrode material 3 with the guide roller 65 while holding the positive electrode material 3 therebetween is performed. The positive-electrode material 3 is fed by the operation of the positive-electrode material gripper member 66 so that the winding start end 3 a is sent out to the outer peripheral portion of the core member 47.

In the polymer secondary battery manufacturing apparatus 20,
The core angle of the core member 47 is adjusted as shown in FIG. The winding core member 47 is adjusted and rotated as indicated by the arrow by the adjusting operation of the winding shaft 46, and is brought into a state parallel to the positive electrode material 3.

In the polymer secondary battery manufacturing apparatus 20,
Next, the winding roller mechanism 48 and the nipple roller mechanism 49 are operated, respectively, so that the winding roller 58 and the nipple roller 60 are respectively disposed on the outer peripheral portion of the core member 47 as shown by arrows in FIG. An abutting operation is performed. In this state, the winding roller 58 presses and holds the winding start end 3 a of the positive electrode material 3 against the outer peripheral portion of the core member 47. In the polymer secondary battery manufacturing apparatus 20, with the positive electrode material 3 held by the core member 47 and the winding roller 58, the positive electrode material gripper member 66 is moved by the guide roller 65 as shown by the arrow in FIG. Is performed in a direction away from the camera.

In the polymer secondary battery manufacturing apparatus 20,
As shown in FIG. 10, the drive unit UT operates to move the winding core member 47 to the neutral position between the positive electrode material supply guide mechanism 53 and the negative electrode material supply guide mechanism 55 together with the above-described operation of feeding the positive electrode material 3. Is performed. Core member 47
Is rotated counterclockwise in this state, as indicated by the arrow in the figure, and the winding operation is sequentially performed in a state where the positive electrode material 3 and the negative electrode material 4 are superimposed on each other on the outer periphery thereof. Of course, the positive electrode material 3 and the negative electrode material 4 are wound around the outer periphery of the core material 2 which is first wound around the outer periphery of the core member 47.

In the polymer secondary battery manufacturing apparatus 20,
When a predetermined amount of the positive electrode material 3 and the negative electrode material 4 have been wound, a preparation process for a cutting operation of the positive electrode material 3 shown in FIG. 11 is performed. In the polymer secondary battery manufacturing apparatus 20, the driving unit UT operates to position the positive electrode material supply guide mechanism 53 corresponding to the core member 47, and the positive electrode material supply guide mechanism 53 causes the positive electrode material gripper member 66 and the guide roller to move. The positioning operation is performed by adjusting the position of the lens 65 in the vertical direction. The positive electrode material gripper member 66 is fixed to the positive electrode material 3 by being joined to the guide roller 65 as shown in FIG. Further, in the polymer secondary battery manufacturing apparatus 20, in this state, an operation is performed in which the positive electrode material cutter mechanism 54 enters the positive electrode material 3 into the traveling path.

In the apparatus 20 for manufacturing a polymer secondary battery,
The cutting position of the positive electrode material 3 is defined by the series of operations described above, and the positive electrode material cutting mechanism 54 operates to cut the positive electrode material 3 as shown in FIG. 11B. The positive electrode material 3 is cut in the range of the positive electrode active material non-applied portion 8, and this portion is configured as the next winding start end 3a. In the polymer secondary battery manufacturing apparatus 20, the occurrence of an internal short circuit due to the cutting burr generated at the winding start end 3a in the cutting of the positive electrode material 3
As described above, the winding start end 3a is covered with the core material 2 to suppress the winding. The wound state of the positive electrode material 3 with respect to the core member 47 is maintained by the winding roller 58 and the nipple roller 60 which are in contact with the outer peripheral portion of the core member 47.

In the apparatus 20 for producing a polymer secondary battery,
When the above-described cutting operation of the positive electrode material 3 is completed, an operation of returning to the standby position with the guide roller 65 and the positive electrode material gripper member 66 holding the positive electrode material 3 is performed as shown by an arrow in FIG. In the polymer secondary battery manufacturing apparatus 20, as shown by arrows in FIG.
The operation of retracting the positive electrode material cutter mechanism 54 from the travel path of the above is performed.

In the apparatus 20 for producing a polymer secondary battery,
Next, a cutting step of the negative electrode material 4 is performed. In the polymer secondary battery manufacturing apparatus 20, the drive unit UT operates to position the negative electrode supply guide mechanism 55 corresponding to the core member 47, and the operations of the negative electrode supply guide mechanism 55 and the negative electrode material cutter mechanism 56 are performed. . Negative electrode supply guide mechanism 5
5 holds the negative electrode material 3 by joining the negative electrode material gripper member 68 to the guide roller 67 as indicated by the arrow in FIG. In this case, the negative electrode supply guide mechanism 55 is adjusted and moved vertically to be positioned. Negative electrode cutter mechanism 56
Enters the traveling path of the negative electrode material 4.

In the apparatus 20 for manufacturing a polymer secondary battery,
The cutting position of the negative electrode material 4 is defined by the series of operations described above, and the negative electrode material cutting mechanism 56 operates to cut the negative electrode material 4 as shown in FIG. 13B. The negative electrode material 4 is cut in the range of the negative electrode active material non-applied portion 13, and this portion is the next winding start end 4 a
Is configured as In the polymer secondary battery manufacturing apparatus 20, the occurrence of an internal short due to the cutting burr generated at the next winding start end 4 a in the cutting of the negative electrode material 4 is reduced by the core material 2 as described above.
By coating. The negative electrode material 3 includes a core member 47.
The winding state is maintained by the winding roller 58 and the nipple roller 60 abutting on the outer peripheral portion of the roller.

In the polymer secondary battery manufacturing apparatus 20,
A predetermined amount of the positive electrode material 3 and a predetermined amount of the negative electrode material 4 are wound in a superposed state by rotating the core member 47 and winding the leading ends of the positive electrode material 3 and the negative electrode material 4 cut by the above-described process. The polymer secondary battery 1 is manufactured.
In the polymer secondary battery manufacturing apparatus 20, the retreat operation of the negative electrode material cutter mechanism 56 from the traveling path of the negative electrode material 4 is performed. In the polymer secondary battery manufacturing apparatus 20, the negative electrode supply guide mechanism 55 returns to the standby position as shown by the arrow in FIG.

In the apparatus 20 for manufacturing a polymer secondary battery,
After the above steps, the winding roller mechanism 48 and the nipple roller mechanism 49 operate to perform the operation of separating the winding roller 58 and the nipple roller 60 from the core member 47 as shown in FIG. . Polymer secondary battery manufacturing equipment 2
At 0, the polymer secondary battery 1 manufactured from the core member 47 is taken out. In the polymer secondary battery manufacturing apparatus 20, the high-viscosity electrolytes 7, 12 are formed by winding the positive electrode material 3 and the negative electrode material 4 around the outer periphery of the core member 47 via the core material 2 as described above. It is prevented from being attached to the core member 47. Therefore, the polymer secondary battery 1
Thus, it is possible to prevent the inner peripheral portion from being damaged when being taken out from the core member 47.

The present invention is, of course, not limited to the polymer secondary battery manufacturing apparatus 20 and the manufacturing steps of the polymer secondary battery 1 described above.

[0086]

As described above in detail, according to the lithium ion polymer secondary battery of the present invention, the negative electrode material and the positive electrode material are wound by being wound with the core material as the core. Therefore, the gel electrolyte does not adhere to the winding shaft, and when the gel electrolyte is taken out of the manufacturing apparatus, damage to the inner peripheral portion due to the adhered gel electrolyte is suppressed, and the durability of the manufacturing apparatus is improved. Become like
In addition, according to the lithium ion polymer secondary battery, the core material interposed between the part where the polar active material is applied and the part where the polar active material is not applied causes the mixture of the polar active material generated at the starting end of the negative electrode material and the positive electrode material to jump. In addition, the occurrence of internal short-circuits due to the electrode and the slit burrs of the electrode terminals is suppressed, thereby improving the reliability.

Further, according to the manufacturing apparatus and the manufacturing method of the lithium ion polymer secondary battery according to the present invention, the negative electrode material and the positive electrode material are wound around the core material in a superposed state and wound. Since the ion-polymer secondary battery is manufactured, the negative electrode material or the positive electrode material is not directly wound on the winding shaft, so that the gel electrolyte does not adhere to the winding material. When the ion polymer secondary battery is removed, the inner peripheral portion is not damaged by the adhesive force of the gel electrolyte, and corrosion of the winding shaft and the like due to the gel electrolyte is suppressed, thereby improving durability. According to the manufacturing apparatus and the manufacturing method of the lithium ion polymer secondary battery, the core material is interposed between the portion where the polar active material of each of the negative electrode material and the positive electrode material is applied and the uncoated portion,
Since the positive electrode material and the negative electrode material are wound around the outer periphery of the core material in a superimposed state, a mix jump of the positive electrode active material generated at the beginning of the negative electrode material or the positive electrode material, a slit burr of the electrode terminal, or the negative electrode material And efficient production of a highly accurate and highly reliable lithium ion polymer secondary battery that suppresses the occurrence of internal short-circuits due to burrs and the like when cutting the positive electrode material.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a schematic configuration of a lithium ion polymer secondary battery shown as an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating an apparatus for manufacturing the lithium ion polymer secondary battery.

FIG. 3 is an explanatory diagram of a configuration of a winding section of the manufacturing apparatus.

FIG. 4 is a schematic view of a winding section illustrating a manufacturing process of a lithium ion polymer secondary battery by the manufacturing apparatus, and shows a standby state.

FIG. 5 is a schematic view of the winding section, showing a negative electrode material sending operation step.

FIG. 6 is a schematic view of the winding section, showing a winding operation process of a negative electrode material.

FIG. 7 is a schematic view of the winding section, showing a core material cutting step.

FIG. 8 is a schematic view of the winding section, showing a winding operation process of a negative electrode material.

FIG. 9 is a schematic diagram of the winding unit, showing a winding operation process from a positive electrode material feeding operation.

FIG. 10 is a schematic diagram of the winding section, showing a winding operation process of a negative electrode material and a positive electrode material.

FIG. 11 is a schematic view of the winding section, showing a cutting step of the positive electrode material.

FIG. 12 is a schematic view of the winding section, showing a return process of a positive electrode material cutting mechanism.

FIG. 13 is a schematic view of the winding section, showing a cutting step of the negative electrode material.

FIG. 14 is a schematic view of the winding section, showing a standby position return step.

FIG. 15 is a schematic view of the winding section, showing a step of taking out a lithium ion polymer secondary battery.

FIGS. 16A and 16B are explanatory diagrams of a configuration of a stack type polymer secondary battery. FIG. 16A shows a single cell, and FIG. 16B shows an overall view.

FIG. 17 is a diagram illustrating the configuration of a separator-type polymer secondary battery.

FIG. 18 is an explanatory diagram of a configuration of a coreless polymer secondary battery.

[Explanation of symbols]

1 polymer secondary battery (lithium ion secondary battery), 2
Core material, 3 positive electrode material, 3a winding start end, 4 negative electrode material,
5 positive electrode current collector, 6 positive electrode active material, 7 positive electrode electrolyte, 8
Positive electrode active material uncoated portion, 9 positive electrode terminal member, 10 negative electrode current collector, 11 negative electrode active material, 12 negative electrode electrolyte, 13 negative electrode active material non-coated portion, 14 negative electrode terminal member, 20 polymer secondary battery manufacturing apparatus, 22 cores Material supply section, 23 positive electrode material supply section, 24 negative electrode material supply section, 25 winding section, 27
Core material supply roll, 31 positive electrode material supply roll, 39 negative electrode material supply roll, 46 take-up shaft, 47 core member, 4
8 Roll-in roller mechanism, 49 nipple roller mechanism, 5
1 core material supply guide mechanism, 52 core material cutter mechanism,
53 cathode material supply guide mechanism, 54 cathode material cutter mechanism, 55 anode material supply guide mechanism, 56 anode material cutter mechanism, 58 winding roller, 60 nipple roller, 6
6 Positive electrode material gripper member, 68 Negative electrode material gripper member

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masao Nishiguchi 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5H014 AA04 AA06 BB00 BB04 BB17 CC07 5H028 AA01 BB17 BB19 CC08 CC13 5H029 AJ14 AK03 AL06 AM00 AM03 AM07 AM16 BJ02 BJ14 CJ01 CJ07 CJ28 CJ30 DJ07 EJ12 HJ12

Claims (12)

[Claims] 1. A polymer secondary battery in which a negative electrode material obtained by applying a polar active material and a gel electrolyte to a belt-shaped current collector and a positive electrode material are wound in a superposed state, wherein the negative electrode material and the positive electrode The material is a lithium-ion polymer secondary battery characterized in that a film-shaped core material is used as a core and wound around the outer periphery thereof in a superposed state. 2. The negative electrode material and the positive electrode material are superimposed on an outer peripheral portion of the belt-like current collector such that the core material is interposed between a portion where the pole active material is applied to the current collector and an uncoated portion. The lithium-ion polymer secondary battery according to claim 1, wherein the lithium-ion polymer secondary battery is wound in an assembled state. 3. The negative electrode material and the positive electrode material each have an electrode terminal joined to the part where the pole active material is not applied, and the core material is interposed between the electrode terminal and the part where the pole active material is applied. 3. The lithium ion polymer secondary battery according to claim 2, wherein the secondary battery is wound around the outer periphery of the lithium ion polymer battery in an overlapping manner. 4. The lithium ion polymer secondary battery according to claim 2, wherein the length of the core material is shorter than the length of the non-electrode active material-uncoated portion of the negative electrode material and the positive electrode material. . 5. A negative electrode material supply mechanism for supplying a negative electrode material obtained by applying a negative electrode active material and a gel electrolyte to a strip-shaped negative electrode current collector, and a positive electrode active material and a gel electrolyte being applied to a strip-shaped positive electrode current collector A positive-electrode supply mechanism for supplying a positive-electrode material formed by applying a core material; a core-supply mechanism for supplying a core material made of a film material; and a winding shaft. The core material supplied from the, the negative electrode material supplied from the negative electrode material supply mechanism, and an electrode material winding mechanism for winding the positive electrode material supplied from the positive electrode material supply mechanism in a superposed state The electrode material take-up mechanism includes a state in which the core material cut to a predetermined length is wound around the outer periphery of the winding shaft, and the negative electrode material and the positive electrode material are superimposed on the outer periphery thereof. Of a lithium-ion polymer secondary battery characterized by being wound by Apparatus. 6. The core supply mechanism is provided with a means for cutting the core material, and the core material having a leading end wound around a winding shaft of the electrode material winding mechanism is used to remove the core material from the negative electrode material and the positive electrode. 6. The method according to claim 5, wherein the strip-shaped negative electrode current collector and the positive electrode current collector of the material are cut to a length shorter than a portion where the negative electrode active material and the positive electrode active material are not applied. The manufacturing apparatus of the lithium ion polymer secondary battery according to the above. 7. The electrode material take-up mechanism, wherein the negative electrode material and the positive electrode material are disposed between the non-polar active material-coated portion and the polar active material-coated portion with respect to an outer peripheral portion of the core material. The apparatus for manufacturing a lithium-ion polymer secondary battery according to claim 6, wherein the material is wound in a superposed state with a material interposed therebetween. 8. The electrode material winding mechanism comprises: an electrode terminal in which the negative electrode material and the positive electrode material are bonded to an outer peripheral portion of the core material at a portion where the polar active material is not applied; The apparatus for manufacturing a lithium ion polymer secondary battery according to claim 6, wherein the core material is wound in an overlapped state so as to be interposed between the core and the application site. 9. An electrode material winding device having a winding shaft, wherein the electrode material winding device is provided with a negative electrode material obtained by applying a negative electrode active material and a gel electrolyte to a strip-shaped negative electrode current collector. A positive electrode material obtained by applying a positive electrode active material and a gel electrolyte to a belt-shaped positive electrode current collector and a film-shaped core material are supplied, and cut to a predetermined length on the outer peripheral portion of the winding shaft. A method for manufacturing a lithium-ion polymer secondary battery, comprising: winding the above-mentioned core material, and winding the above-mentioned negative electrode material and positive electrode material in an overlapped state around the outer periphery of the core material. 10. The core material is wound on a winding shaft of the electrode material winding device, and the core material is wound on the strip-shaped negative electrode current collector and the positive electrode current collector of the negative electrode material and the positive electrode material. The apparatus for manufacturing a lithium ion polymer secondary battery according to claim 9, wherein the length of the lithium ion polymer secondary battery is cut shorter than a portion where the negative electrode active material and the positive electrode active material are not applied. 11. The negative electrode material and the positive electrode material are wound around the outer periphery thereof in a state of being overlapped with each other so that the core material is interposed between the pole active material-uncoated portion and the pole active material-coated portion. The method for producing a lithium ion polymer secondary battery according to claim 10, wherein: 12. The outer periphery of the negative electrode material and the positive electrode material such that the core material is interposed between the electrode terminal bonded to the non-polar active material-uncoated portion and the polar active material-coated portion, respectively. The method for producing a lithium ion polymer secondary battery according to claim 10, wherein the secondary battery is wound in a superposed state.