WO2003043107A1

WO2003043107A1 - Method for manufacturing secondary battery electrode composite material and manufacturing apparatus

Info

Publication number: WO2003043107A1
Application number: PCT/JP2002/010343
Authority: WO
Inventors: Yasuo Kurimoto; Ryoichi Furuichi
Original assignee: Toray Engineering Co., Ltd.
Priority date: 2001-11-15
Filing date: 2002-10-03
Publication date: 2003-05-22
Also published as: JP2003151538A

Abstract

An apparatus for manufacturing a secondary battery electrode composite material comprises a coating base feed mechanism, a separator feed mechanism, a coating mechanism for coating a coating base with a solution containing an electrode substance, a laminate mechanism for bonding the separator and the base coated with the solution containing the electrode substance, a heating mechanism for fixing the electrode substance on the coated base by heating, and a wind-up mechanism for winding up an electrode composite material that is an integral of the coated base, electrode substance, and separator.

Description

Specification

TECHNICAL FIELD The present invention relates to a method for manufacturing an electrode composite material for a secondary battery and an apparatus therefor.

The present invention relates to a method for manufacturing a secondary battery composite material for manufacturing a secondary battery and an apparatus therefor. Background art

In recent years, power sources for mobile phones, television cameras, and notebook computers have been required to be small, light, large-capacity, and high-voltage.For example, secondary batteries such as lithium-ion polymer batteries and lithium batteries have been used. I have. In the secondary battery, a predetermined electrode material-containing solution is continuously or intermittently applied to a positive electrode substrate and a negative electrode substrate, and heated and solidified to produce positive and negative electrode sheets. A secondary battery is manufactured by inserting the positive electrode, the negative electrode, and the separator cut into a width or a predetermined shape into a package in a state of winding or laminating a plurality of sheets, and injecting a solution-type electrolyte material. .

Among the above-mentioned batteries, the lithium ion polymer secondary battery is a carrier material. The cathode material, the anode material, and the insulating material are each applied to an electrode substrate, dried, and then wound and rolled to form a roll-shaped cathode material film, an anode material film, and the like. A film forming process in which the separator films are individually formed, and the positive electrode material film, the negative electrode material film, and the separator film are cut into predetermined widths to form a roll of the positive electrode material film, the negative electrode material film, and the separator film. A step of individually forming a positive electrode film and a negative electrode film by bonding a roll-shaped positive electrode material film and a negative electrode material film cut to a predetermined width across a current collector on both surfaces of the current collector, respectively. And Laminate Current Collector for the Positive and Negative Electrodes One step, forming a negative electrode film with a separator on both sides of the bonded negative electrode film, and collecting current on both sides of the positive electrode film and the negative electrode film with the separator. A punching process of punching out the part into a predetermined shape with a die, a positive electrode film half-cutting process of half-cutting only the positive electrode film on the carrier material with a die, and half-cutting on both sides of the negative electrode film with separator. A transferring step of transferring the transferred positive electrode film to a predetermined position at a predetermined interval; a laminating step of bonding the transferred positive electrode film and the negative electrode film with a separator; and a transferring step of transferring the transferred positive electrode film to the predetermined position. In the process of punching out the assembly with the evening negative electrode film bonded to each electrode with a mold It has been produced me.

In the battery manufacturing method described above, when the positive electrode material film, the negative electrode material film, and the separator film, which are intermediate processes, are cut into a predetermined width or a predetermined shape, respectively, the electrode material falls off and adheres to the electrode sheet. However, when molded into a secondary battery as it is, the dropped electrode material may break through the separator and cause short-circuiting and other problems.

Therefore, it is necessary to provide a dust removal step before molding the secondary battery to remove the dropped electrode material.

In addition, when the lithium ion secondary battery is formed by the winding method, the positive electrode sheet and the negative electrode sheet are superimposed on the separator, and the layers are rolled up. Relative displacement is likely to occur in each layer. For this reason, there is a problem that the risk of a short circuit increases.

When a lithium-ion polymer secondary battery is formed by a lamination method, it is necessary to apply a separator to a carrier substrate and then bond it to an electrode sheet, which involves many manufacturing processes and consumes a carrier substrate. There is a problem that the efficiency is low and the manufacturing cost is disadvantageous. An object of the present invention is to provide a method and apparatus for manufacturing an electrode composite material for a secondary battery capable of preventing the occurrence of defective products, improving production efficiency, and reducing manufacturing costs and manufacturing equipment costs. Disclosure of the invention

The method of manufacturing an electrode composite material for a secondary battery according to the present invention includes: a coating base material sending step of sending a coating base material at a predetermined speed; a separating material sending step of sending a separation material at a predetermined speed; A coating process of continuously or intermittently applying a substance-containing solution to a coating substrate, a lamination process of bonding a coating substrate coated with an electrode substance-containing solution and a separator, A heating step of heating the applied solution containing the electrode substance to fix the electrode substance, and a winding step of winding the electrode composite material in which the coating base material, the electrode substance, and the separator are formed into a body. Are included.

According to the method for manufacturing an electrode composite material for a secondary battery of the present invention, since the electrode composite material for a secondary battery is manufactured by the above process, it is not necessary to install a laminating mechanism in a subsequent process, and the number of processing steps can be reduced. In addition, the separator can be efficiently and reliably bonded to the electrode material.

In the method for producing an electrode composite material for a secondary battery according to the present invention, in the laminating step, the electrode substance-containing solution applied to the coating substrate in the coating step is in an unsolidified state. It is preferable to attach lamine overnight to the material. In this way, by attaching the separator with the electrode material-containing solution in an unsolidified state, the separator can be securely fixed by the electrode material, and the separator can serve as a reinforcing material for the electrolyte. Since it functions, it is possible to prevent the electrolyte material from dropping off or generating burrs during a cutting operation in a later step. For this reason, when formed as a secondary battery, it is possible to reduce damage to the battery due to a short circuit. In the method for producing an electrode composite material for a secondary battery according to the present invention, the electrode substance-containing solution may be a positive electrode substance-containing solution or a negative electrode active substance containing a positive electrode active material, a conductive material, a binder, and a dispersant. A solution containing a negative electrode material containing a conductive material, a binder, and a dispersant. A positive electrode active material is lithium oxide, a negative electrode active material is a carbon material, a conductive material is natural graphite or carbon black or acetylene black, and a binder is a solution of polyvinylidene fluoride (PVDF) or hexafluoropropylene (HEP). Alternatively, a solution of these copolymers is preferable. In particular, the carbon material forming the negative electrode active material is more preferably coke-based carbon or graphite-based carbon.

Further, the apparatus for manufacturing an electrode composite material for a secondary battery according to the present invention includes a coating base material sending mechanism for sending the coating base material at a predetermined speed, and a separation material sending mechanism for sending the separation material at a predetermined speed. A coating mechanism for continuously or intermittently applying the electrode substance-containing solution to the coating substrate, a laminating mechanism for bonding the coating substrate coated with the electrode substance-containing solution to the separator, and a coating base. A heating mechanism that heats the electrode substance-containing solution applied to the material to fix the electrode substance, and a winding mechanism that winds the electrode composite material consisting of the coating base, the electrode substance, and the separator. Are provided.

Further, according to the apparatus for manufacturing an electrode composite material for a secondary battery of the present invention, since the above-described mechanism is provided, the above-described method for manufacturing an electrode composite material for a secondary battery can be suitably realized. Further, the number of processing steps can be reduced, so that the entire manufacturing apparatus can be made compact and the manufacturing apparatus cost and manufacturing cost can be reduced.

Further, according to the apparatus for manufacturing an electrode composite material for a secondary battery of the present invention, it is preferable that the coating mechanism is formed by a die coater having a slit for discharging a solution or by a single mouth. In particular, if the coating mechanism is formed of a die having a slit for discharging a solution, each solution can be accurately positioned at a predetermined position. Can be applied.

In the apparatus for manufacturing an electrode composite material for a secondary battery according to the present invention, the heating mechanism includes: a heating chamber for heating the electrolyte-containing solution applied to the coating substrate by hot air composed of a heated gas; A heating box main body composed of two sealing chambers separated from the heating chamber by a plate, a hot air supply means for supplying the hot air into the heating chamber, and discharging hot air from each of the sealing chambers 2 Preferably, the heating box main body is provided with an inlet and an outlet in the direction of the entrance of the sheet-like material, and an opening is provided in each of the partition plates in the same direction. By constructing the positive and negative electrode sheet heating mechanisms in this way, when the two exhaust means operate respectively, outside air is sucked in from the inlet and outlet of the heating box main body, and together with the opening of the partition plate, the inside of the heating chamber is opened. Hot air is sucked in and discharged. Therefore, it is possible to prevent the hot air in the heating chamber from flowing out of the entrance and exit of the heating box. The heating mechanism may be a process in which the coated base material is conveyed over a plurality of ports, or a hot air is supplied from the nozzle toward the coated base material, and the coated base material is floated. It is preferable to heat the coated base material during the transportation. By using such a form, the coated base material can be heated while being efficiently transported. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic view showing one embodiment of an apparatus for manufacturing an electrode composite material for a secondary battery of the present invention,

FIG. 2 is a schematic cross-sectional view showing one embodiment of an electrode composite material in which a coating substrate, an electrode substance, and a separator are combined. BEST MODE FOR CARRYING OUT THE INVENTION The following are forms for solving the conventional problems.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing one embodiment of a configuration of an electrode composite material manufacturing apparatus for a lithium ion secondary battery, which is one of the secondary battery electrode composite material manufacturing apparatuses of the present invention. The apparatus for manufacturing an electrode composite material for a secondary battery includes a coating substrate delivery mechanism 1 for delivering a coating substrate 110, which is a positive electrode coating substrate or a negative electrode coating substrate, at a predetermined speed, and a positive electrode material or a negative electrode material. A coating mechanism 2 for continuously or intermittently applying the electrode substance-containing solution 300 containing the electrode substance, a separation transmission mechanism 3 for transmitting an insulating separator 210 at a predetermined speed, A laminating mechanism 4 for bonding the coated substrate 110 coated with the electrode substance-containing solution 300 to the separation layer 210, and the electrode substance applied to the coated substrate 110 A heating mechanism 5 for heating the containing solution 300 to fix the electrode material, a coating substrate 110, the electrode material 310, and a separator. And a take-up mechanism 6 for winding the electrode composite material 400 into a roll. A coating substrate sending step for sending the coating base material at a predetermined speed, a separation sending step for sending the separation base at a predetermined speed, and a coating for continuously or intermittently applying the solution containing the electrode substance to the coating base material. Processing step, laminating step of bonding the coating substrate coated with the electrode substance-containing solution and the separator, heating step of heating the electrode substance-containing solution applied to the coating substrate to fix the electrode substance, It corresponds to a winding process for winding an electrode composite material in which a coating substrate, an electrode substance, and a separator are integrated.

The coating substrate delivery mechanism 1 is drawn out from a supply means 10 for supplying a coating substrate 110 as a positive electrode sheet or a negative electrode sheet, which is a current collector, and from a raw material roll 100. A first guide roller 11 for guiding the coated base material 110, a driving roller and a nip roller, and the first base material 110 travels toward the coating mechanism 2 at a predetermined speed. And sending means 12. The supply means 110 of the coating substrate 110 is a single chuck shaft (for example, a jaw chuck mechanism for supporting the core by pressing a movable member such as a claw on the inner peripheral surface of the core by supplying compressed air. (A chuck shaft provided) is rotatably attached to the frame installed on the machine frame or base by bearings, and the coated base material 110, which is a positive electrode sheet or negative electrode sheet, is wound up. The raw material roll 100 is horizontally supported with the chuck shaft penetrating therethrough. The chuck shaft is rotated by a motor and the coated substrate 110 is sent out at a predetermined speed. It has become.

The supply means 10 includes an original material on which at least one of the core chucks is moved in the longitudinal direction of the axis and the core chuck is rotatably attached to a frame. A roll having a configuration in which the roll 100 is supported by the core chuck in a horizontal state from both sides can be used. '

The first guide roller 11 has a flanged roller or a cylindrical roller rotatably mounted on a common machine frame or a single frame by a bearing.

The first feeding means 12 is rotated by a motor as a driving means, and is connected to a driving roller attached to a common machine frame or a single frame by a bearing, and to a guide formed on the machine frame or a single frame. A support mounted so as to move along with the support, is rotatably mounted on the support, and is pressed against the driving roller by a predetermined force by a pressing means such as an air cylinder, a spring, a screw shaft, or the like. And a nip roller.

The coating mechanism 2 is disposed so that the discharge port of the slit die 13 is located on one side with the coating substrate 110 interposed therebetween, and the backup roller 14 is located on the other side, and the electrode substance-containing solution 3 Coating liquid supply means with a storage tank for storing 0, a pump for liquid supply, a filter for removing impurities, a solenoid valve for switching pipelines, a pipe for circulation, a pipe for liquid supply, etc. Are connected. The distance between the discharge port of the slit die 13 and the peripheral surface of the back-up roller 14 depends on the thickness of the coating substrate 110 and the application amount (coating thickness) of the electrode substance-containing solution. Then, at least one of the slit die roller 13 and the backup roller 14 is moved and adjusted to the set dimensions.

Instead of the backup roller 14, a flat member with low friction processing such as Teflon resin coating was used, and it was installed at a position facing the slit die 13 with the coating substrate 110 interposed. You can also.

Instead of the above-described slit die coating type coating mechanism 2, a roll-co-single type coating mechanism may be used, as long as the electrode substance-containing solution can be coated continuously or intermittently.

The separator sending mechanism 3 is a reel supporting means 16 for holding a reel 200 on which a separator 210 made of a synthetic resin sheet as an insulating material is wound, and is pulled out from the reel 200. A second guide port for guiding the separated separator 210 --La 17, a driving roller and a nip roller, and the separator 210 is driven toward the laminating mechanism 4 at a predetermined speed. And two feeding means 18.

The reel support means 16 is configured such that a chuck shaft (for example, a chuck shaft having an air chuck mechanism) rotated by a driving means is rotatably attached to a frame mounted on a machine frame or a base by bearings. The take-up reel 200 of Separator 210 is horizontally supported with the chuck shaft penetrating therethrough.

Similar to the first guide roller 11, the second guide roller 17 has a flanged roller or a cylindrical roller rotatably mounted on a common machine frame or a single frame by bearings.

The above-mentioned reel support means 16 is provided for at least one of the core chucks. The core chuck is rotatably attached to the frame as the chuck moves in the longitudinal direction of the axis, and the reel 200 on which the separator 210 is wound is supported by the core chuck in a horizontal state from both sides. It is possible to use one with the configuration described below.

The second feeding means 18 is rotated by a motor which is a driving means in the same manner as the first feeding means 12, and a driving roller attached to a common machine frame or a single frame by a bearing; A support that is mounted to move along a guide formed on a single frame, and a driving roller that is rotatably mounted on the support and that is pressed by pressing means such as an air cylinder, a spring, or a screw shaft. And a nip roller pressed by a predetermined force against the nip roller.

The laminating mechanism 4 is rotated by a motor serving as a driving means, is configured by rollers mounted on a common machine frame or a single frame by bearings, and is applied to the coating substrate 110. It is installed at a position where it is fed into the roller with the separator 210 bonded to the electrolyte-containing solution 300 in an unsolidified state.

The roller is made of stainless steel or the like and the surface is polished, or the roller is made of steel and the surface is chrome plated. Instead of the laminating mechanism 4, it is rotated by a motor as a driving means, and is formed on a common machine frame or a single frame by a bearing. A supporting member mounted to move along the guide; and a rotatably mounted on the supporting member, which is pressed against the driving roller by a predetermined force by pressing means such as an air cylinder, a spring, or a screw shaft. And a nip roller that is used.

In this case, the electrode substance-containing solution 300 or the electrode substance 310 is separated. It is necessary to adjust the Ep pressure so as not to flow out or seep out from the hole or both ends of evening 210.

The heating mechanism 5 heats the electrode substance-containing solution 300 applied while the coated substrate 110 travels in the horizontal direction, and turns the coated substrate 110 and the separator 210 into electrodes. A heating chamber 22 for fixing the substance 310, and a seal for separating the heating chamber 22 from the heating chamber 22 by the partition plates 20 and 21 to prevent hot air from flowing out of the entrance and exit of the coating substrate 110. A heating box main body 19 in which chambers 23 and 24 are formed, a fan for blowing air, a heater for heating gas such as heating air and gas to a predetermined temperature, and a heating chamber 22 for heating heated gas. Hot air supply means 25 comprising a duct for supplying air to the air, and exhaust means 26 and 27 comprising ducts for connecting the exhaust fan and the seal chambers 23 and 24. .

A nozzle for blowing hot air toward one or both surfaces of the coating substrate 110 can be appropriately installed in the heating chamber 22.

When the above-described exhaust means 26 is activated, outside air is sucked in from the inlet of the heating box main body 19, and hot air in the heating chamber 22 is sucked and discharged from the opening of the partition plate 20. When activated, the outside air is sucked in from the outlet of the heating box main body 19 and the hot air in the heating chamber 22 is sucked and discharged from the opening of the partition plate 21. Therefore, it is possible to prevent the hot air in the heating chamber 22 from flowing out of the inlet and outlet of the heating box main body 19.

Instead of the above-mentioned heating by hot air, heating by electric heating elements (resistance heating, far-infrared heating, etc.) can be used. If there is little heat flowing out of the entrance of the heating chamber, the sealing chamber 23 , 24 can be omitted.

In addition, a plurality of rotatable rolls are installed in the heating box main body 19 in place of the heating mechanism 5, and the separator 210 is placed on the electrolyte-containing solution 300 applied to the coating substrate 110. The substrate with 0 attached is transported while supporting it horizontally, and the electrolyte-containing solution 300 is heated by hot air to apply the electrolyte 310

0 Roller support type heating mechanism to adhere to material 110, separator 210, hot air jet nozzle or compressed air jet nozzle are installed at predetermined intervals above and below, and applied to coating substrate 110 The separated electrolyte 210 containing the separated electrolyte 210 is floated and transported in a horizontal state, and heated with hot air to heat the electrolyte-containing solution 300. It is possible to use a heating mechanism of a floating type in which 310 is fixed to the coating substrate 110 and the separation layer 210, or a heating mechanism of both types.

The take-up mechanism 6 has a single chuck shaft (for example, a chuck shaft having an air chuck mechanism) rotatably mounted on a frame mounted on a machine frame or a base by bearings, similarly to the supply means 10. The coating substrate 110, the electrode material 310, and the separator 210 are fixed to the electrode composite material 400, which is fixed to an integrated body. It is designed to support. The chuck shaft is rotated by a motor so that the electrode composite 400 is wound up at a predetermined speed.

In the winding mechanism 6, at least one core chuck of the core chuck moves in the longitudinal direction of the axis and the core chuck is rotatably mounted on the frame, and the winding core of the electrode composite 400 is provided with the core. It is possible to use a structure that is supported horizontally from both sides by a core chuck.

At the outlet of the winding mechanism 6, a third feeding means 28 is provided, and an electrode composite material in which the coating base material 110, the electrode material 310, and the separator 210 are fixed to one body. 400 is taken at a predetermined speed and sent to the winding mechanism 6.

The third feed means 28 is rotated by a motor which is a drive means, like the first feed means 12 and the second feed means 18, and is mounted on a common machine frame or a single frame by bearings. A support roller mounted to move along a guide formed on the machine frame or a single frame; The nip roller is rotatably mounted on the support and is pressed by a predetermined force against the driving roller by pressing means such as an air cylinder, a spring, and a screw shaft.

At least one of the above-mentioned first guide roller 11 and second guide roller 17 or first feed means 12, second feed means 18 and third feed means 28 has a meandering correction function. Is preferred.

It is possible to install a third guide roller between the third feed means 28 and the winding mechanism 6, and to install a third guide roller in place of the third feed means 28.

The first guide roller 11, the second guide roller 17, the rollers of the laminating mechanism 4 and the like are provided with at least one of tension detecting means, meandering amount detecting means, and application position detecting means.

The application position of the electrode substance-containing solution 300 to the coating substrate 110 by the tension detecting means, meandering amount detecting means, and coating position detecting means installed on the roller, 2 The feeding speed of the coating substrate 1 10 by the supply means 1 and the first feeding means 1 2, and the coating by the coating mechanism 2 so that the bonding position with the 1 10 coincides and there is no loosening or displacement. The control of the interval and the amount of application, the transport speed control of the separation 210 by the reel support means 16 and the second feed means 18 and the meandering correction control are performed.

The feeding speed control of the above-mentioned coating substrate feeding mechanism 1, the separation feeding mechanism 3, the winding speed control of the winding mechanism 6, the feeding speed control of the laminating mechanism 4 and the third feeding means 28, the coating mechanism 2 The application amount and the intermittent ejection timing control of the application liquid are controlled by a control device or a computer having a set value input function, a storage function, a comparison operation function, an operation command output function, and the like. When a positive electrode composite or a negative electrode composite is manufactured by the above-described secondary battery electrode composite manufacturing apparatus, a positive electrode sheet or a current collector is used in advance.

Two The raw material roll 100 on which the coated substrate 110 of the negative electrode sheet is wound is attached to the chuck shaft of the supply means 10 in the coated substrate delivery mechanism 1. The reel 200 on which the separator 210 has been wound is mounted on the chuck shaft of the reel support means 16 of the separator receiver sending mechanism 3.

A solution containing a positive electrode material (a solution containing a positive electrode active material, a conductive material, a binder, a dispersant, etc.) or a solution containing a negative electrode material (a negative electrode active material, a conductive material) is applied to the coating solution supply means 15 in the coating mechanism 2. The electrode substance-containing solution 300, which is a solution containing a binder, a dispersing material, and the like, is stored in a storage tank.

The current collector of the raw roll 100 is preferably a foil of stainless steel, nickel, titanium, aluminum, copper or the like, and a surface-treated material can be used.

Lithium manganate as the positive electrode active substance is a lithium transition metal oxide forming the positive electrode material-containing solution described above _{_{(L i Mn 2 0 2;}} ), lithium cobaltate (L i C O_〇 _2), Niggeru acid (L i N i 〇 ₂₎ and the like are preferable _c also, coke-based carbon, graphite based carbon preferably a carbon material showing a Richiumuio down storage capacity as a negative electrode active substance to form a negative electrode material-containing solution. The conductive material is preferably a known material having electronic conductivity, such as natural graphite, carbon black, and acetylene black.

As the binder, a solution of polyvinylidene fluoride (PVDF), hexafluoropropylene (HFP) or the like, or a copolymer solution thereof is preferable. An organic solvent that can dissolve the binder is suitable as the dispersing agent. Acetone, melethyl ketone (MEK), tetrahydrofuran (THF), dimethylformamide, dimethylacetamide, tetramethylurea, trimethylethyl phosphate, N-methylpyrrolid Don (NMP) and the like are preferred.

The separator 210 is made of a non-woven fabric such as polypropylene or polyethylene which is a porous insulating material, a woven fabric, or a porous material such as polypropylene or polyethylene. Film can be used.

After the above operation is completed, the leading end of the coated substrate 110

If an unprocessed sheet portion for threading work is provided on the (drawer side), the unprocessed sheet portion is pulled out from the raw roll 100, and if no unprocessed sheet portion is formed, a coated substrate A lead film is adhered to the leading end of 110, and is passed over the first guide roller 11 and the first feeding means 12; then, between the slit die roller 13 and the backup roller 14 in the coating mechanism 2. When passing through the laminating mechanism 4 through the laminating mechanism 4, it passes through the inside of the heating box main body 19 of the heating mechanism 5, and extends over the third feeding means 28, and is held by the chuck shaft of the winding mechanism 6 Wrap around.

When the draw-back winding operation of the coated base material 110 is completed, if an unprocessed sheet portion for work is provided from the reel 200 to the leading end (drawer side) of the separator 210. The unprocessed sheet portion is pulled out from the reel 200. If the unprocessed sheet portion is not formed, a lead film is attached to the leading end of the separator 210, and the second guide roller 17 and the second feeding means 1 When it passes over the untreated sheet portion of the coating substrate 110 or the lead film, it passes over the laminating mechanism 4, and then passes through the heating box body 19 of the heating mechanism 5. It is wound around the third feeding means 28 and wound around the core held on the chuck shaft of the winding mechanism 6.

When these preparations are completed, the supply means 10 and the first feeding means 12 of the coating base material sending mechanism 1, the reel supporting means 16 and the second feeding means 18 of the separation evening sending mechanism 2, and the third The feeding means 28 and the winding mechanism 6 are operated to wind up the untreated sheet portion or the lead film of the coating substrate 110 and the separator 210.

When the coating substrate 110 to which the electrode substance-containing solution 300 can be applied comes to the coating position of the coating mechanism 2, the coating liquid supply means 15 of the coating mechanism 2 is activated. tube The path is switched, and the positive electrode material-containing solution or the negative electrode material-containing solution, ie, the electrode material-containing solution 300, is discharged from the slit die 13 and applied to the coating substrate 110.

When the coated substrate 110 coated with the electrode substance-containing solution 300 is sent toward the laminating mechanism 4, the separator 210 immediately before the laminating mechanism 4 contains the unsolidified electrode substance-containing substance. The solution is overlaid on the solution 300, and between the coating substrate 110 and the electrode substance-containing solution 300 or between the electrode substance-containing solution 300 and the electrode substance-containing solution 210 on the roller peripheral surface of the laminating mechanism 4. At least one of them is desirably bonded under pressure so that air bubbles and the like do not exist in both.

When the coated base material 110, the electrode substance-containing solution 300, and the separator 210 are transported to the heating mechanism 5 in a state where they are bonded together, they are heated by hot air, and the dispersing material evaporates. The electrode substrate 310 (positive electrode active material and conductive material and binder or negative electrode active material and conductive material and binder) as shown in FIG. 2 has a predetermined thickness. It is fixed to 110 and separation 210 and becomes the electrode composite material 400 and wound up by the winding mechanism 6.

In the above-described manufacturing operation of the electrode composite material 400, a predetermined position (the tension detecting means installed in the first guide roller 11, the second guide roller 17, the laminating mechanism 4, the winding mechanism 6, etc., No change occurs in the application position of the electrode substance-containing solution 300, the applied amount, and the bonding position between the coated substrate 110 and the separator 210 by the meandering amount detecting means, the coating position detecting means, and the like. As described above, the speed control and the meandering correction control of the coating base material sending mechanism 1, the separation and feeding mechanism 3, the laminating mechanism 4, the winding mechanism 6, and the like are performed, and the discharge control of the coating mechanism 2 is performed.

In the above-described embodiment, the laminating mechanism 4 and the third sender are pulled out of the separator 210 from the reel 200 and superimposed on the coating substrate 110. The operation was started in the state of being wound around step 28 and wound around the winding mechanism 6. Only the coated base material 110 was wound on the laminating mechanism 4 and the third feeding means 28 to be wound on the winding mechanism 6. The operation is started in a state where the separator 210 is pulled out from the reel 200, and the coated substrate 1 10 is brought to the coating position of the coating mechanism 2 and the electrode material is moved by the coating mechanism 2. When the containing solution 300 is applied, the separator 210 is superimposed, sent to the laminating mechanism 4 and bonded together, and heated by the heating mechanism 5 to evaporate the dispersing material, and the electrode material 310 is coated. What has been fixed to the working base material 110 and the separator 210 to form the electrode composite material 400 can be wound up by the winding mechanism 6. Industrial applicability

As described above, the method and apparatus for manufacturing an electrode composite material for a secondary battery according to the present invention can be used for portable phones, television cameras, notebook computers, and the like, which are required to be small and light, have a large capacity, and have a high voltage. It is suitable for secondary batteries such as lithium ion polymer batteries and lithium batteries used as power sources.

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Claims

The scope of the claims

1. A coating base material sending step of sending the coating base material at a predetermined speed, a separator sending step of sending a separator at a predetermined speed, and a solution containing the electrode substance continuously or intermittently to the coating base material. A coating step of applying an electrode substance-containing solution to the coating substrate, and a laminating step of bonding the coating substrate coated with the electrode substance-containing solution to the separation substrate; and heating the electrode substance-containing solution applied to the coating substrate by heating the electrode substance A heating step of fixing the electrode composite, and a winding step of winding the electrode composite material in which the coated base material, the electrode substance, and the separator are combined. Electrode composite manufacturing method.

2. The method for producing an electrode composite material for a secondary battery according to claim 1, wherein in the laminating step, the electrode substance-containing solution applied to the coating substrate in the coating step is in an unsolidified state. A method for producing an electrode composite material for a secondary battery, comprising laminating a laminated substrate on a processed substrate.

3. The method for manufacturing an electrode composite material for a secondary battery according to claim 1, wherein the electrode substance-containing solution comprises a positive electrode substance-containing solution or a negative electrode comprising a positive electrode active material, a conductive material, a binder, and a dispersant. A method for producing an electrode composite material for a secondary battery, comprising a negative electrode material-containing solution containing an active substance, a conductive material, a binder, and a dispersant.

4. The method for producing an electrode composite material for a secondary battery according to claim 3, wherein the positive electrode active material contained in the positive electrode material-containing solution is a lithium oxide. Production method.

5. The method for producing an electrode composite material for a secondary battery according to claim 3, wherein the negative electrode active material contained in the negative electrode material-containing solution is a carbon material. Method.

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6. The method for manufacturing an electrode composite material for a secondary battery according to claim 5, wherein the carbon material is coke-based carbon or graphite-based carbon.

7. The method for producing an electrode composite material for a secondary battery according to claim 1, wherein the electrode material-containing solution comprises a positive electrode material-containing solution or a negative electrode comprising a positive electrode active material, a conductive material, a binder, and a dispersant. A secondary battery comprising a negative electrode material-containing solution containing an active substance, a conductive material, a binder, and a dispersant, wherein the conductive material is natural graphite, carbon black, or acetylene black. For manufacturing electrode composite materials.

8. The method for manufacturing an electrode composite material for a secondary battery according to claim 1, wherein the electrode material-containing solution comprises a positive electrode material-containing solution or a negative electrode comprising a positive electrode active material, a conductive material, a binder, and a dispersant. A solution containing a negative electrode material containing an active substance, a conductive material, a binder, and a dispersant, wherein the binder is a solution of polyvinylidene fluoride or hexafluoropropylene, or a solution thereof. A method for producing an electrode composite material for a secondary battery, which is a copolymer solution.

9. Coating base material sending mechanism for sending coating base material at a predetermined speed, Separate feeding mechanism for feeding separating material at a predetermined speed, and continuous or intermittent application of electrode substance-containing solution to coating base material A coating mechanism for applying the electrode substance-containing solution, a laminating mechanism for attaching the coating substrate coated with the electrode substance-containing solution and the separator, and an electrode substance-containing solution that is heated by heating the electrode substance-containing solution applied to the coating substrate. An electrode composite for a secondary battery, comprising: a heating mechanism for fixing; and a winding mechanism for winding an electrode composite material in which a coating substrate, an electrode substance, and a separator are formed. Material production equipment.

10. The apparatus for manufacturing an electrode composite material for a secondary battery according to claim 9, wherein the laminating mechanism is configured such that the electrode substance-containing solution applied by the coating mechanism is in an unsolidified state.

8 Secondary battery manufacturing equipment, which is installed at the position where the separator is attached to the coated base material in the state.

11. The secondary battery electrode composite manufacturing apparatus according to claim 9, wherein the coating mechanism is formed of a die-coat having a solution discharge slit. Material production equipment.

12. The apparatus for producing an electrode composite material for a secondary battery according to claim 9, wherein the coating mechanism is formed by a roll roller.

13. The apparatus for manufacturing an electrode composite material for a secondary battery according to claim 9, wherein the heating mechanism heats the electrolyte-containing solution applied to the coating substrate by hot air composed of a heated gas. A heating chamber, a heating box main body composed of two sealing chambers separated from the heating chamber by respective partition plates, a hot air supply means for supplying the hot air into the heating chamber, and the respective sealing chambers And two exhaust means for exhausting hot air from the heater respectively. An inlet and an outlet are provided in the heating box main body with respect to the entrance / exit direction of the sheet-like material, and openings are provided in the respective partition plates in the same direction. An electrode composite material manufacturing apparatus for a secondary battery, comprising:

14. The apparatus for manufacturing an electrode composite material for a secondary battery according to claim 9, wherein the heating mechanism comprises a plurality of coated substrates on which an electrolyte-containing solution is applied and a separator is attached. An apparatus for manufacturing an electrode composite material for a secondary battery, wherein the apparatus is heated by hot air while being transported on a roll.

15. The apparatus for manufacturing an electrode composite material for a secondary battery according to claim 9, wherein the heating mechanism is configured to blow hot air toward the coating base material on which the electrolyte-containing solution is applied and the separation is bonded. Production of electrode composites for secondary batteries, characterized in that they are supplied from a nozzle and heated while floating and transporting the coated substrate