JPH1092418A - Manufacturing device for battery electrode plate and manufacture thereof and battery electrode plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing device for a battery electrode plate having no separation of an active material layer from a collector in an electrode plate, and allowing the easy winding of the electrode plate, and also increasing the capacity of a cylindrical battery. SOLUTION: Position regulating means 5 for a collector 2 are provided at the upperstream side in the collector running direction in two nozzles 4 facing each other with a predetermined gap. The position regulating means 5 flatten the surface of the collector 2. The collector 2 passes through the gap at its substantially central portion. Active material paste 6 is released from the nozzles 4 to form an active material layer 3 on both the surfaces of the collector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for manufacturing a battery electrode plate in which an active material paste is applied on a current collector, and a battery electrode plate manufactured using the apparatus or method.

[0002]

2. Description of the Related Art As a method of manufacturing a battery electrode plate by applying an active material paste on a current collector, the active material paste is discharged from a nozzle and wound on a back roll to run on the current collector. A method for forming a material layer is disclosed in Japanese Patent Laid-Open No. 7-65816.
Is shown in Also, in the active material paste application step, a method in which the active material paste is not applied to the current collector as a lead plate weld of the electrode plate by repeatedly supplying and stopping the active material paste to the nozzle is provided. This is disclosed in JP-A-8-45501.

[0003]

However, in Japanese Patent Application Laid-Open No. 7-65816, when providing an active material layer on both surfaces of a current collector, it is necessary to perform two steps of forming and drying the front surface, then forming and drying the back surface. And productivity is poor. Furthermore, before the active material paste is applied to the back surface, the active material layer on the surface that has already been applied and formed is hurt by a roll in the application process on the back surface, and the active material layer on the front surface is fatally separated. Problems have arisen. When applied only on the surface, it has a two-layer structure of an active material layer and a current collector made of a metal foil. Thickness differs by an order of magnitude on the order of 100 microns. With this configuration, the position of the neutral axis exists in the active material layer when the electrode plate is wound around a roll and bent.
Furthermore, the metal foil has much higher bending flexibility than the active material layer. Therefore, when the active material layer is applied only to one surface, the bending force concentrates on the active material layer, which induces cracking and peeling. Further, since the adhesiveness of the active material layer to the metal foil is weak, the active material layer is separated from the metal foil. As a result, the active material layer on the front surface is peeled off before the back surface is applied, so that the product yield is significantly reduced. Even if the active material layer does not peel or fall off in the application step, in the case of a cylindrical battery, since the electrode plate is wound, the same problem eventually occurs,
It had a fatal defect of not functioning as a battery.

In Japanese Patent Application Laid-Open No. Hei 8-45501, it is possible to form a portion where the active material paste is applied on the current collector and a portion where the active material paste is not applied for welding the lead plate in the application step. Further, the thickness of the applied portion is constant from the beginning to the end of the application. However, in a cylindrical battery such as a lithium ion secondary battery, a nickel cadmium battery, and a nickel hydride battery, when the positive electrode, the negative electrode, and the separator are spirally wound and sealed in a cylindrical case,
In particular, at the center of the winding, the thickness of the edge of the electrode plate is as large as several hundred microns despite the very small radius of curvature. Therefore, when the electrode plate obtained by the above method is used, the active material layer is collected. There was a problem of peeling off from the electric body and a problem of difficulty in winding. Furthermore, if the center and outer periphery of the winding are thick, a space is created between the cylindrical case and the end of the electrode plate, and the volume of the electrode that can be sealed in the case is limited. I was

The present invention has been made in view of the above-mentioned problems, and has no peeling of an active material layer from a current collector in a manufacturing process of an electrode plate.
When the electrode plate is spirally wound, the active material layer does not fall off or peel off from the center of the winding, and can be easily wound, and the capacity of the cylindrical electrode can be further increased. An object is to provide a manufacturing method, a manufacturing apparatus, and a battery electrode plate.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides a coating means for discharging and applying an active material, wherein the active material is provided on a current collector by a predetermined method. Current collector guiding flattening means for flattening the surface of the current collector running in a certain direction so as to be applied to a position at a predetermined thickness, and guiding the current collector. This is a battery electrode plate manufacturing apparatus.

According to a fifth aspect of the present invention, there is provided a coating means for discharging and applying an active material, and the collecting means running in a predetermined direction so that the active material is applied to a predetermined position on a current collector. A battery electrode plate manufacturing apparatus, comprising: a current collector inducing means for inducing a current; and an application amount adjusting means for adjusting an application amount of the active material on the current collector.

Further, the invention according to claim 17 is a coating step of discharging an active material from a nozzle and applying the active material on a current collector, and applying the active material to a predetermined position on the current collector by a predetermined thickness. So that the surface of the current collector running in a certain direction is flattened and the current collector is guided to flatten the current collector. A method for producing a battery electrode plate, which is performed in combination with a resting step.

The invention according to claim 20 is a coating continuation step of discharging an active material from a nozzle and continuously applying the active material by a predetermined thickness on a current collector traveling in a fixed direction, and applying the active material. A method for producing a battery electrode plate, comprising combining an application amount adjusting step of applying an amount while adjusting the amount and an application suspending step of suspending the application.

The invention according to claim 30 is that, in one or both ends in the longitudinal direction of the active material layer applied on the current collector by a predetermined thickness, the applied thickness of the active material is A battery electrode plate having a thin thin layer portion formed thereon.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment. (Embodiment 1) Hereinafter, the configuration of a battery electrode plate manufacturing apparatus according to a first embodiment of the present invention will be described. FIG.
1 is a schematic cross-sectional view of a battery electrode plate manufacturing apparatus according to a first embodiment of the present invention. A pair of opposed nozzles 4 having a predetermined gap indicated by AA ′ in FIG. 2 are connected to a supply unit having a quantitative property such as a metering pump for supplying the active material paste 6. . In addition, the nozzle 4
Is applied onto the current collector 2 traveling in a certain direction. A position regulating tool 5 is provided on the upstream side of the nozzle 4 in the traveling direction. The position restricting tool 5 guides the current collector 2 so that the current collector 2 passes between the gap between the pair of nozzles 4 and flattens the surface of the current collector 2. The position restricting device 5 has a pair of substantially cylindrical portions, and guides the current collector 2 while sandwiching the current collector 2 between the two cylindrical surfaces thereof, and collects the current collector 2 so as to pass through a substantially center of the gap of the nozzle 4. It is configured to regulate the position of the electric body 2.

Hereinafter, the operation of the battery electrode plate manufacturing apparatus according to the present embodiment will be described. The current collector 2 is guided by the position restricting tool 5 so as to pass through substantially the center of the gap between the pair of nozzles 4. The position restricting member 5 is formed in a pair of substantially cylindrical shapes, and guides the current collector 2 traveling in a certain direction toward the nozzle 4 to flatten its surface. The active material paste 6 discharged from the slit of the nozzle 4 is applied to both surfaces of the current collector 2.
Ideally, when the current collector 2 passes through the center of the gap, the thicknesses of the active material layers on both surfaces become uniform, but as shown in FIG.
A current collector extends within a range substantially at the center of the gap AA 'where the distance X from the tip of one nozzle 1 to the current collector 2 is not less than 1/4 and not more than 3/4 of the gap AA'. Even when 2 passes, the thickness of the active material layers on both surfaces can be made substantially uniform. Within this range, there is almost no difference in thickness between the active material layers applied and formed on both surfaces, so that the active material layer does not peel at all when the electrode plate is wound around a cylindrical battery case and sealed. When the current collector 2 passes within the range of the gap AA ′, that is, substantially the center, the respective liquid pressures of the active material pastes 6 discharged from both nozzles 4 are balanced, and the thickness of both surfaces is reduced. Be even. Outside this range, there is a difference in thickness between the front and back of the active material layer, and peeling of the active material layer occurs.
The size of the gap AA ′ is appropriately set depending on the desired thickness of the electrode plate and the viscosity and solid content of the active material paste. Investigations by the present inventors have revealed that the active material paste can be uniformly applied within a range of 0.1 mm or more and 3 mm or less. When the gap AA ′ is smaller than this range, the thickness as a battery electrode plate cannot be obtained. When the gap AA ′ is wider than this range, the active material paste 6 discharged from the nozzle 4 hangs down from the nozzle and cannot be applied, so that the air between the active material layer 3 and the current collector 2 is Are involved and do not become an electrode plate. Further, the distance from the nozzle slit outlet to the position regulating tool 5 is 200 mm.
The following is assumed. If the distance is larger than this range, the current collector 2
The active material layer 3 cannot be uniformly applied to the current collector 2 due to the irregularities, undulations, and wrinkles. That is, even when the current collector 2 does not have ideal flatness, the position restricting tool 5 also has an effect of flattening the current collector and facilitating both-side application.

As an example of a specific embodiment, an active material paste is prepared by kneading fine powder of a hydrogen storage alloy and water, and is formed on a punching metal having a thickness of 0.1 mm and a width of 100 mm as a current collector. The active material paste was applied and dried using the method for manufacturing a battery electrode plate according to the present embodiment. The gap AA ′ between the nozzles was 0.4 mm, and as a means for regulating the position of the current collector, one was a metal roll and the other was a rubber roll. At this time, the dimension of X in FIG.
The position of the position regulating means is changed so as to be 1, 0.2, 0.3, 0.32 mm, and the electrode plates are formed by coating, respectively.
The state of peeling of the active material layer after coating and drying was examined. As a result, as shown in Table 1, within the range of the present embodiment, the thickness of the active material layer on both surfaces can be made substantially uniform, and the active material layer is not peeled off in the coating step and the winding step as a cylindrical battery. No good electrode plate was obtained.

As described above, according to the present embodiment, by providing the position regulating tool 5 on the upstream side or both the upstream and downstream sides of the nozzle 4 in the traveling direction of the current collector 2, the current collector 2
Of the current collector 2 so as to pass through substantially the center of the gap AA ′, and the surface of the current collector 2 can be flattened. As a result, the active material paste 6 discharged from the nozzle 4 is uniformly applied to a predetermined portion on both surfaces of the current collector 2, and as a result, the active material paste 6 is also applied to the current collector 2 in a step of winding for use in a cylindrical battery. There is no peeling of the active material layer applied on the substrate. As described above, a high-quality battery electrode plate can be obtained using the battery electrode plate manufacturing apparatus according to the present embodiment.

In this embodiment, a position restricting tool may be provided on the downstream side of the nozzle 4 in the current collector running direction or on both the upstream and downstream sides. In this case, the downstream position regulating tool regulates only the unnecessary portion on the current collector 2.

The position restricting tool 5 is not particularly limited. For example, a pair of rotating rolls may be made of metal, resin, rubber, or the like, a fixed bar, or a flexible sheet. In short, it is only necessary that the current collector 2 be disposed so as to pass substantially at the center of the gap AA ′.

Active material paste 6 used in the present embodiment
Is prepared by kneading an electrode active material, a conductive agent, a binder, a solvent, and the like. Hereinafter, these electrode active materials, conductive agents, binders, and solvents will be described.

Examples of the electrode active material include H ⁺ , Li ⁺ ,
Any compound that can insert or release Na ⁺ and K ⁺ may be used, but an oxide mainly composed of a transition metal chalcogenide, a carbonaceous material, or the like can be used. An oxide mainly composed of a carbonaceous material is preferable. Mn, Co, N
It is preferable that i, V, and Fe are mainly used. Specifically, LiCoO ₂ , LiNiO ₂ , LiCo _0.5 Ni _0.5 O ₂ ,
LiMn ₂ O ₄ , LiCo _0.9 AL _0.1 O ₂ , Fe ₃ O _{4 and the} like can be mentioned. As the carbonaceous material, graphite, petroleum coke, cresol resin fired carbon, ferran resin fired carbon, or the like can be used.

The conductive agent may be any electronic conductive material that does not cause a chemical change in the constructed battery.
Usually, natural graphite (phosphorous graphite, flaky graphite), artificial graphite,
Conductive materials such as carbon black, acetylene black, Ketjen black, and carbon fiber can be included alone or as a mixture.

Examples of the binder include carboxymethyl cellulose (hereinafter abbreviated as CMC), polyvinyl alcohol, fluorine resin, formal resin, acetal resin, acrylic / styrene copolymer resin, styrene / butadiene copolymer resin, and the like. At least one of a thermoplastic resin and a polymer having rubber elasticity or a mixture thereof can be used.

The solvent is preferably one having a high polarity. For example, water, ethyl alcohol, N-methylpyrrolidone, toluene, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, ethanol, methanol and butyl acetate can be used.

The current collector according to the present embodiment uses a metal, such as aluminum, copper, nickel, or stainless steel, or nickel plating or iron on iron, and is a continuous body, a punching metal, a net, or a sponge. Nickel, nickel short fiber sintered body, etc.

The active material paste may include a hydrogen storage alloy or cadmium oxide. (Embodiment 2) The configuration of a battery electrode plate manufacturing apparatus according to a second embodiment of the present invention will be described. FIG. 4 is a schematic sectional view of a battery electrode plate manufacturing apparatus according to a second embodiment of the present invention. A pair of nozzles 4 having a predetermined gap and facing each other is connected to a supply means having a quantitative property such as a quantitative pump for supplying the active material paste 6. or,
The active material paste 6 discharged from the nozzle 4 is applied on the current collector 2 traveling in a certain direction. A position regulating tool 5 is provided on the upstream side of the nozzle 4 in the traveling direction. The position restricting tool 5 guides the current collector 2 so that the current collector 2 passes between the gap between the pair of nozzles 4 and flattens the surface of the current collector 2. The position restricting tool 5 has an elastic plate 51 and a fixed plate 52, and guides the current collector 2 while sandwiching the same between the elastic plate 51 and the fixed plate 52, and moves the current collector 2 so as to pass through the substantial center of the gap of the nozzle 4. It is configured to regulate the position.

The operation of the battery electrode plate manufacturing apparatus according to this embodiment will be described below. The current collector 2 is guided by the position restricting tool 5 so as to pass through substantially the center of the gap between the pair of nozzles 4. The position regulating tool 5 has an elastic plate 51 and a fixed plate 52, and planarizes the surface while guiding the current collector 2 traveling in a certain direction toward the nozzle 4. The active material paste 6 discharged from the slit of the nozzle 4 is applied to both surfaces of the current collector 2. Ideally, when the current collector 2 passes through the center of the gap, the thickness of the active material layers on both surfaces becomes uniform, but as shown in FIG. 3, the distance X from the tip of one nozzle 1 to the current collector 2 Is the gap A-
The thickness of the active material layers on both surfaces should be substantially uniform even when the current collector 2 passes through a range substantially at the center of the gap AA ′ that is １ ／ or more and ／ or less of A ′. Can be. The traveling current collector 2 is sandwiched and supported between an elastic plate 51 and a fixed plate 52 provided on the upstream side of the nozzle 4 to regulate the position of the current collector 2, thereby supporting the current collector 2. To the substantially center of the gap of the nozzle 4. Elastic plate 5
1 is a structure in which the current collector 2 is sandwiched between fixing plates 52 so that the current collector 2
At the same time as having the effect of extending the unevenness, undulation and wrinkles of the current collector 2. In particular, a punching metal is used as the current collector 2 and its thickness is 30
In the case where the thickness of the active material layer is not more than μm, unevenness and undulation are very large in some cases.
Cannot be applied uniformly. Further, the distance between the fixing plate 52 and the slit exit of the nozzle 4 is set to 200 mm or less. If it is larger than this range, even if the unevenness and wrinkles of the current collector 2 are extended and flattened by the fixing plate 52, the current returns to the original state before reaching the nozzle, and the active material layer cannot be uniformly applied. The position of the electric body 2 becomes unstable, and it becomes difficult to pass through the gap substantially at the center. Elastic plate 51
Is for sandwiching the current collector 2 between the fixing plates 52, and has elasticity, flexibility, and slidability. The shape is preferably a smooth sheet having a constant thickness in the coating width direction. Although the material of the elastic plate 51 is not particularly limited,
For example, a polyester-based sheet, nylon, Teflon, or the like can be used. Although the thickness of the sheet varies depending on the material, the thickness is preferably 30 μm to several millimeters in order to have an appropriate elastic force. In this embodiment, that the current collector 2 passes substantially through the center of the gap means that the distance X from the tip of one nozzle 1 to the current collector 2 is equal to the gap, as shown in FIG. 1/4 or more and 3/4 of AA '
It means passing through the following range. Within this range, there is almost no difference in thickness between the active material layers applied and formed on both surfaces, and thus there is no peeling of the active material layer. Outside this range, there is a difference in thickness between the front and back of the active material layer, and peeling of the active material layer occurs. The size of the gap is appropriately set depending on the desired thickness of the electrode plate and the viscosity and solid content of the active material paste 6. According to the study of the present inventors, the dimension of the gap is 0.1 mm or more, 3 mm
It was found that the active material paste could be uniformly applied within the following range. When the gap is smaller than this range, the thickness as the battery electrode plate cannot be obtained. If the gap is wider than this range, the active material paste discharged from the nozzle 4 hangs down from the nozzle and cannot be applied. Air is trapped between the active material layer 3 and the current collector 2 and the electrode plate is And other problems.

As an example of the embodiment, an active material paste is prepared by kneading fine powder of a hydrogen storage alloy and water, and the present invention is applied to a punching metal having a thickness of 0.1 mm and a width of 100 mm as a current collector. The active material paste was applied and dried using the battery electrode plate manufacturing apparatus of the embodiment. The gap between the nozzles is 0.4 mm.
As shown in FIG. 7, the fixing plate 52 was a superhard member having a semicircular arc cross section, and the elastic plate 51 was a polyester sheet having a thickness of 200 μm. At this time, the dimension of X in FIG.
The position of the position regulating means is intentionally changed so as to be 0.1, 0.2, 0.3, and 0.32 mm, and the electrode plate is formed by coating, and the state of peeling of the active material layer after coating and drying is examined. Was. As a result, as in the case of Embodiment 1, as shown in Table 1, within the range of this embodiment, the active material layer was not peeled off in the coating step and the winding step as a cylindrical battery, and a good electrode was obtained. A plate was obtained.

As described above, according to the present embodiment, the position restricting tool 5 having the elastic plate 51 and the fixed plate 52 on the upstream side or both the downstream side of the nozzle 4 in the running direction of the current collector 2. Is provided, the current collector 2 can be guided so that the current collector 2 substantially passes through the center of the gap, and the surface of the current collector 2 can be flattened. As a result, the active material paste 6 discharged from the nozzle 4 is uniformly applied to a predetermined portion on both surfaces of the current collector 2, and as a result, the active material paste 6 is also applied to the current collector 2 in a step of winding for use in a cylindrical battery. There is no peeling of the active material layer applied on the substrate. As described above, a battery electrode plate having excellent quality can be obtained using the battery electrode plate manufacturing apparatus according to the present embodiment.

In this embodiment, a position restricting tool may be provided on the downstream side of the nozzle 4 in the current collector running direction or on both the upstream and downstream sides. In this case, the downstream position regulating tool regulates only the unnecessary portion on the current collector 2.

The position restricting device 5 is not particularly limited. For example, a pair of rotating rolls may be made of metal, resin, rubber, or the like, a fixed bar, or a flexible sheet. In short, it suffices if the current collector 2 is arranged so as to pass substantially at the center of the gap.

The sectional shape of the fixing plate 52 is not limited to a semicircular arc shape as shown in FIG. 4, but may be a circular or substantially circular shape, or a polygonal shape or a composite shape of a circular arc and a plane. In short, the fixing plate 52
Is only required to be able to guide the current collector 2 to pass substantially through the center of the gap. The material of the fixing plate 52 is not particularly limited, either. For example, stainless steel, die steel, carbide or the like can be used. The surface may be quenched and subjected to abrasion resistance.

The active material paste used in the present embodiment is prepared by kneading the same electrode active material, conductive agent, binder, solvent and the like as in the first embodiment. In addition, a current collector similar to that in Embodiment 1 can be used. (Embodiment 3) The structure of a battery electrode plate according to a third embodiment of the present invention will be described. FIG. 1 shows a third embodiment of the present invention.
1 is a partial sectional view of a battery electrode plate according to an embodiment. The thickness of one active material layer 1 relative to the thickness of one active material layer 1 with respect to the current collector 2 is 50 to 150%, preferably 80 to 150%.
The active material layers 1 on both surfaces of the current collector 2 are formed to have a range of 120%. For example, when the thickness of one active material layer 1 is 100 μm, the thickness of the other active material layer is 50 μm.
To 150 μm, preferably 80 to 120 μm. Within this range, in the roll transporting step after coating and drying the active material layer 1, when the electrode plate is hung on a roll, the active material layer 1 is separated from the current collector 2, which is fatal. No problem. This is because the active material layer 1
And a current collector 2 mainly composed of a metal foil,
The current collector 2 has a thickness of several digits to several tens of microns while the active material layer 1 has an order of magnitude of one hundred to several hundred microns. This is because the position of the neutral axis is inside or near the current collector 2. Therefore, the bending force does not concentrate on the active material layer 1 even on the roll or in the winding step as a cylindrical battery, and the active material layer 1 does not crack or peel.

As an example of the embodiment, an active material paste is prepared by kneading a fine powder of a hydrogen storage alloy and water, and is formed on a punching metal having a thickness of 0.1 mm and a width of 100 mm as a current collector. The active material paste was applied and dried using the battery electrode manufacturing apparatus described in Embodiment 2. The gap between the nozzles is 0.4 mm, and as the position control means of the current collector, as shown in FIG. 4, the fixing plate 52 is a super-hard member having a semicircular arc cross section, and the elastic plate 51 is formed of a 200 μm-thick polyester sheet. did. At this time, when the dimension of X in FIG. 3 is changed and the thickness of one of the active material layers is set to 100, the other active material layer is coated with an electrode plate in the range of 30 to 190, The state of peeling of the active material layer after coating and drying was examined. As a result, as shown in Table 2, within the range of the present embodiment, the active material layer was hardly peeled off in the coating step and the winding step as a cylindrical battery, and a good electrode plate was obtained.

As described above, according to the present embodiment, the position restricting tool 5 having the elastic plate 51 and the fixed plate 52 on the upstream side or both the upstream side and the downstream side of the nozzle 4 in the traveling direction of the current collector 2. Is provided, the current collector 2 can be guided so that the current collector 2 substantially passes through the center of the gap, and the surface of the current collector 2 can be flattened. Thus, the active material paste 6 discharged from the nozzle 4 is uniformly applied to a predetermined location on both surfaces of the current collector 2 with a predetermined thickness. Furthermore,
When the thickness of one active material layer 1 applied on both surfaces of the current collector 2 is 100 μm, the thickness of the other active material layer is 50 μm.
When the thickness is in the range of from 150 to 150 μm, and preferably in the range of from 80 to 120 μm, the active material layer applied on the current collector 2 does not peel off even in the step of winding for use in a cylindrical battery. As described above, an electrode plate having excellent quality can be obtained.

The active material paste used in the present embodiment is prepared by kneading the same electrode active material, conductive agent, binder, solvent and the like as in the first embodiment. In addition, a current collector similar to that in Embodiment 1 can be used. (Embodiment 4) A method for manufacturing a battery electrode plate according to a fourth embodiment of the present invention will be described using an apparatus for carrying out the method. FIG. 6 is a schematic cross-sectional view of an apparatus for manufacturing a battery electrode plate by the manufacturing method according to the fourth embodiment of the present invention.

Hereinafter, the configuration of an apparatus for performing the manufacturing method according to the present embodiment will be described. The nozzle 4 is connected to a supply means having a quantitative property such as a metering pump for supplying the active material paste 6. The nozzle 4 has a predetermined gap A with a cylindrical surface of a substantially cylindrical back roll 8. -A '. The current collector 2 is supported by the cylindrical surface of the back roll 8, and travels in a certain direction along the cylindrical surface of the back roll 8 as the back roll 8 rotates. The active material paste 6 discharged from the nozzle 4 is configured to be applied onto the running current collector 2.

The operation of the apparatus for carrying out the method for manufacturing a battery electrode plate according to the present embodiment will be described below. In the present embodiment, a step of discharging a predetermined amount of active material paste 6 from the nozzle 4 as shown in FIG. 6A and applying it on the current collector 2, and a step shown in FIG. After the discharge of the active material paste 6 from the nozzle 4 is stopped, the active material paste 6 in the paste pool 7 remaining between the nozzle 4 and the current collector 2 is completely applied to form the thin layer portion 101 at the end of application. The forming step is combined with a step in which no active material paste 6 is discharged from the nozzle 4 and no active material paste 6 exists between the nozzle 4 and the current collector 2 as shown in FIG. Do it. In the electrode plate thus obtained, as shown in FIG. 7, the active material layer 1 is formed on the current collector 2 in a fixed rectangular pattern, and the terminal portion of the active material layer 1 in the running direction of the current collector 2 Has a thin layer 1 of the active material layer
01 is formed. Note that the active material layer 1 having the thin layer portion 101 can be provided on the back side of the current collector 2 in the same manner. The length and thickness of the thin layer portion 101 are determined based on the solid content of the active material paste and the volume of the paste reservoir 7 formed between the nozzle 4 and the substrate 2. The volume of the paste reservoir 7 is determined by the gap AA ′ and the length of the tip of the nozzle 4, that is, the dimensions of L1 and L2 shown in FIG. 6 and the dimensions of the slit in the L1 and L2 directions.

In the step (b), the end of the cut may be improved by stopping the discharge of the paste 6 and simultaneously drawing the paste 6 in the slit into the nozzle. (See Japanese Patent Application Nos. 6-74792, 5-220971, and 7-311997)

As an example of the embodiment, a gap A-
A 'is 0.3mm, L1 is 3mm, slit size is 1
mm, L2 is set to 3 mm, and the active material paste is applied intermittently on the current collector, dried, wound up, and the active material layer is also intermittently formed on the back side in the same manner to form a positive electrode and a negative electrode. An electrode plate was made. The thickness of the active material layer 1 after drying on only one side was 150 μm, and the thickness of the thin layer portion 101 was 80 μm. Thereafter, the resultant was cut into a predetermined width and length to prepare a battery electrode plate as shown in FIG. The length of L3 at this time is 1
0 mm or less. This is shown in FIG.
A negative electrode 10 and a separator 11 are sandwiched and wound to form a case 12
Sealed inside. As a result, the defect rate at the time of winding was 0%.
The active material layer was not peeled off from the current collector at the center of the winding, that is, at the portion where the radius of curvature of the electrode plate was smallest. Compared to a battery made of a conventional electrode having no thin layer portions at both ends of the active material layer, the electrode plate according to the present embodiment has the same inner and outer circumferences when it is wound because there is no waste. In this case, a large amount of active material could be sealed, and the battery capacity could be increased by 5%. From the above results, according to the present embodiment, it is possible to remarkably improve the process yield at the time of winding and to increase the battery capacity.

As described above, according to the present embodiment, the active material layer is formed on the current collector 2 in a fixed rectangular pattern.
In addition, a thin layer portion of the active material layer can be formed at the terminal portion of the active material layer in the running direction of the current collector. As a result, it is possible to provide a method for manufacturing a battery electrode plate with good process yield and excellent productivity, and by providing this method, it is possible to provide a high-quality battery electrode plate with a large battery capacity. .

In the above-described method for manufacturing an electrode plate having the thin layer portion 101, the pair of nozzles face each other with a predetermined gap therebetween, and the active material paste is applied to both surfaces of the current collector passing through the gap. It is also effective when using a coating method.

The means for stopping the discharge of the active material paste from the nozzle 4 is not particularly limited. For example, an electromagnetic valve is provided in the active material paste supply pipe up to the nozzle 4 and the timer is set. Nozzle 4 intermittently
There is a method of repeatedly supplying and stopping the active material paste to the substrate.

In the present embodiment, the coating end portion of the active material layer in the current collector running direction is made thinner, but the coating start end portion, which is the opposite end portion, is not particularly limited. Instead, the starting end may be thicker than other active material layers, or may be an equivalent or thinner layer.

The active material paste used in the present embodiment is prepared by kneading the same electrode active material, conductive agent, binder, solvent and the like as in the first embodiment. In addition, a current collector similar to that in Embodiment 1 can be used. (Embodiment 5) A battery electrode plate manufacturing apparatus according to a fifth embodiment of the present invention will be described. FIG. 9 is a schematic sectional view of a battery electrode plate manufacturing apparatus according to a fifth embodiment of the present invention.

Hereinafter, the configuration of the manufacturing apparatus according to the present embodiment will be described. The nozzle 4 is connected to a supply means having a quantitative property such as a metering pump for supplying the active material paste 6. The nozzle 4 has a predetermined gap A with a cylindrical surface of a substantially cylindrical back roll 8. -A '. The current collector 2 is supported by the cylindrical surface of the back roll 8, and travels in a certain direction along the cylindrical surface of the back roll 8 as the back roll 8 rotates. The active material paste 6 discharged from the nozzle 4 is configured to be applied onto the running current collector 2.

Hereinafter, the operation of the battery electrode plate manufacturing apparatus according to this embodiment will be described. In the battery electrode plate manufacturing apparatus of the present embodiment, a predetermined amount of active material paste 6 is discharged from nozzle 4 as shown in FIG.
And a nozzle 4 as shown in FIG.
The active material paste 6 is gradually discharged from the nozzle 4 to form a thin layer portion 101 at the end of the application, and the active material paste 6 is completely discharged from the nozzle 4 as shown in FIG. In the step where no active material paste 6 is present between the nozzle 4 and the current collector 2, the discharge amount of the active material paste 6 from the nozzle 4 is gradually increased by a predetermined amount as shown in FIG. This is performed in combination with the process of forming the thin layer portion 102 at the start of application by increasing the amount until the amount reaches the amount. FIG. 5E shows a state immediately after the start of the coating as shown in FIG. 5D, and a coating state in which a predetermined amount of coating is continuously applied onto the current collector 2 as shown in FIG. This shows a state of returning. In the electrode plate thus obtained, as shown in FIG. 10, the active material layer 1 is formed on the current collector 2 in a fixed rectangular pattern, and the terminal portion has a thin layer portion 101 of the active material layer.
A starting thin layer portion 102 of the active material layer is formed at the starting end.
The active material layer 1 having the thin layer portion 101 and the starting thin layer portion 102 can be provided on the back side of the current collector 2 in the same manner. The length and thickness of the thin layer portion 101 and the starting thin layer portion 102 are determined based on the solid content of the active material paste and the supply amount of the active material paste 6 supplied to the nozzle 4.

As an example of the embodiment, the gap A-
The active material paste is intermittently applied on the current collector with A 'being 0.3 mm, dried, wound up, and the active material layer is also intermittently formed on the back side by the same method as the positive electrode and the negative electrode. Was prepared. The thickness of the active material layer 1 after drying on only one side is 150 μm, and the thickness of the thin layer portions 101 and 102 is 80 μm.
μm. Then, it is cut into a predetermined width and length, and
A battery electrode plate as shown in FIG. L3 at this time
Is 10 mm or less. This was wound around a positive electrode 9, a negative electrode 10 and a separator 11 as shown in FIG. As a result, the defective rate at the time of winding was 0%, and the active material layer was not peeled off from the current collector at the center of the winding, that is, at the portion where the radius of curvature of the electrode plate was smallest. Compared to a battery made of a conventional electrode having no thin layer portions at both ends of the active material layer, the electrode plate according to the present embodiment has the same inner and outer circumferences when it is wound because there is no waste. A large amount of active material can be sealed in the case, and the battery capacity is 5
% Could be increased. From the above results, according to the present embodiment, it is possible to remarkably improve the process yield at the time of winding and to increase the battery capacity.

As described above, according to the present embodiment, the active material layer is formed on the current collector 2 in a fixed rectangular pattern.
In addition, a thin layer portion of the active material layer can be formed at the terminal portion of the active material layer in the running direction of the current collector. As a result, it is possible to provide a battery electrode plate manufacturing apparatus with good process yield and excellent productivity, and by using this apparatus, it is possible to provide a high quality battery electrode plate with a large battery capacity.

The back roll 8 according to the present embodiment is
And a nozzle 4 that faces through a predetermined gap AA ′
Is an embodiment of the application means according to the present invention, and the active material paste may be applied to both surfaces of the current collector passing through the gap AA ′.

Means for gradually decreasing or gradually increasing the discharge amount of the active material paste from the nozzle is as follows:
For example, a method of gradually increasing or decreasing the number of revolutions of a metering pump for supplying the active material paste to the nozzle 4 or providing a flow rate adjusting valve between the pump and the nozzle 4 to gradually supply the active material paste 6 to the nozzle 4 There are ways to decrease and increase.

The means for stopping the discharge of the active material paste from the nozzle 4 is not particularly limited. For example, an electromagnetic valve is provided in the active material paste supply pipe up to the nozzle 4, and the timer is set. Nozzle 4 intermittently
There is a method of repeatedly supplying and stopping the active material paste to the substrate.

The active material paste used in this embodiment is
It is formed by kneading the same electrode active material, conductive agent, binder, solvent and the like as in the first embodiment. The current collector is also used in the first embodiment.
The same as described above can be used. (Embodiment 6) The structure of a battery electrode plate according to a sixth embodiment of the present invention will be described. FIG. 5 shows a sixth embodiment according to the present invention.
1 is a schematic sectional view of a battery electrode plate according to an embodiment. A thin layer portion 101 having a thin active material layer is provided at at least one end of each active material layer 1 formed on both surfaces of the current collector 2 in the current collector running direction. Although the thickness of the active material layer 1 is not particularly limited, it is usually in the range of 100 μm to 3 mm. The thickness of the thin layer portions 101 and 102 is in the range of 10 to 90%, more preferably 50 to 90% with respect to the thickness of the active material layer 1. If the thickness is smaller than this range, the amount of the active material as the electrode plate becomes too small, so that the capacity of the battery is reduced, and the battery may not function as well. If the thickness is larger than this range, when the electrode plate is wound, a serious problem such as the active material layer peeling off from the current collector 2 due to the bending due to a small radius of curvature of the center portion occurs. The length L3 in the electrode plate longitudinal direction of the thin layer portion 101 or 102 at the end is in the range of 0.5 to 50 mm, and more preferably in the range of 0.5 to 20 mm. If the length is longer than this range, the amount of the active material as the electrode plate becomes too small, and the capacity of the battery is reduced, and the battery may not function as well. If the length is shorter than this range, when the electrode plate is wound, since the radius of curvature at the center is small, a serious problem such as peeling of the active material layer from the current collector 2 due to bending occurs.

As an example of the embodiment, positive and negative electrode plates were formed by the method of the fourth embodiment. The thickness of the active material layer 1 after drying on only one side is 150 μm,
1 had a thickness of 80 μm. The length of L3 is 7mm
And Thereafter, the resultant was cut into a predetermined width and length to prepare a battery electrode plate as shown in FIG. This was wound around a positive electrode 9, a negative electrode 10 and a separator 11 as shown in FIG. As a result, the defective rate at the time of winding was 0%, and the active material layer was not peeled off from the current collector at the center of the winding, that is, at the portion where the radius of curvature of the electrode plate was smallest. Compared to a battery made of a conventional electrode having no thin layer portions at both ends of the active material layer, the electrode plate according to the present embodiment has the same inner and outer circumferences when it is wound because there is no waste. A large amount of active material can be sealed in the case, and the battery capacity is 5
% Could be increased. From the above results, according to the present embodiment, it is possible to remarkably improve the process yield at the time of winding and to increase the battery capacity.

As described above, according to the present embodiment, the active material layers are formed on both surfaces of the current collector 2 in a fixed rectangular pattern, and at least one of the active material layers in the running direction of the current collector. By forming a thin layer portion of the active material layer at the end of, an excellent quality battery electrode plate having a large battery capacity can be obtained.

In the present embodiment, at least one end of each active material layer in the current collector running direction is thinned, but the opposite end is not particularly limited. As shown in FIG. 11, both ends of each active material layer on both surfaces of the current collector may be thinly coated, or only one end may be thickly coated.

The active material paste used in this embodiment is
It is formed by kneading the same electrode active material, conductive agent, binder, solvent and the like as in the first embodiment. The current collector is also used in the first embodiment.
The same as described above can be used.

Further, the battery electrode plate of the present embodiment can be manufactured using Embodiments 4 and 5. (Embodiment 7) Hereinafter, a method for manufacturing a battery electrode plate according to a seventh embodiment of the present invention will be described. FIG. 12 is a schematic sectional view of an apparatus for carrying out the method for manufacturing a battery electrode plate according to the seventh embodiment of the present invention. Hereinafter, a configuration of a manufacturing apparatus for performing the battery electrode plate manufacturing method according to the seventh embodiment of the present invention will be described. A pair of nozzles 4 having a predetermined gap AA ′ and opposed to each other are connected to a supply means having a quantitative property such as a quantitative pump for supplying the active material paste 6. The active material paste 6 discharged from the nozzle 4 is applied on the current collector 2 traveling in a certain direction. A position regulating tool 5 is provided on the upstream side of the nozzle 4 in the traveling direction. The position restricting tool 5 has a gap A-
Inducing the current collector 2 so that the current collector 2 passes between A ′,
In addition, the surface of the current collector 2 is flattened. Positioning device 5
Has a pair of substantially cylindrical portions, guides the current collector 2 while sandwiching the current collector 2 between the two cylindrical surfaces, and collects the current collector 2 so as to pass through the substantial center of the gap AA ′ of the nozzle 4. It is configured to regulate the position of the electric body 2.

The operation of the apparatus for carrying out the method for manufacturing a battery electrode plate according to the present embodiment will be described below.
The current collector 2 is guided by the position restricting tool 5 so as to pass through the substantial center of the gap AA ′ between the pair of nozzles 4. The position restricting member 5 is formed in a pair of substantially cylindrical shapes, and guides the current collector 2 traveling in a certain direction toward the nozzle 4 to flatten its surface. The active material paste 6 discharged from the slit of the nozzle 4 is applied to both surfaces of the current collector 2. Ideally, gap A-
When the current collector 2 passes through the center of A ′, the thicknesses of the active material layers on both surfaces become uniform, but as shown in FIG.
When the current collector 2 passes through a range substantially at the center of the gap AA 'in which the distance X from the tip of the current collector 2 to the current collector 2 is 1/4 or more and 3/4 or less of the gap AA'. However, the thickness of the active material layers on both surfaces can be made substantially uniform. Within this range, there is almost no difference in thickness between the active material layers applied and formed on both surfaces, and thus there is no peeling of the active material layer. Outside this range, there is a difference in thickness between the front and back of the active material layer, and peeling of the active material layer occurs. The size of the gap AA ′ is appropriately set depending on the desired thickness of the electrode plate and the viscosity and solid content of the active material paste. According to the study of the present inventors, 0.1 mm or more and 3 mm
It was found that the active material paste could be uniformly applied within the following range. The gap AA ′ is larger than this range.
When the thickness is narrow, the thickness as a battery electrode plate cannot be obtained. When the gap AA ′ is wider than this range, the active material paste discharged from the nozzle 4 hangs down from the nozzle and cannot be applied, or air between the active material layer 3 and the current collector 2 cannot be applied. Entangled and did not become an electrode plate. Further, the distance from the slit outlet of the nozzle to the position regulating tool 5 is set to 200 mm or less. If the distance is larger than this range, the active material layer 3 cannot be uniformly applied to the current collector 2 due to the unevenness, undulation, and wrinkles of the current collector 2.
Further, in the present embodiment, as shown in FIG. 12A, a predetermined amount of the active material paste 6 is discharged from the nozzle 4 and applied to both surfaces of the current collector 2, and FIG. As shown, after the discharge of the active material paste 6 from the nozzle 4 is stopped, the active material paste 6 in the paste pool 7 remaining between the nozzle 4 and the current collector 2 is completely applied to remove the current collector 2. A step of forming a thin layer portion 101 at each end of the coating on both sides, and no active material paste 6 is discharged from the nozzle 4 at all, as shown in FIG. The process is performed in combination with a process in which no active material paste 6 exists. In the electrode plate thus obtained, as shown in FIG. 13, the active material layer 1 is formed on both sides of the current collector 2 in a fixed rectangular pattern, and the terminal of the active material layer 1 in the running direction of the current collector 2 A thin layer portion 101 of the active material layer is formed in the portion. The thin layer portion 101 is also provided on the back side of the current collector 2 by the same method.
Can be provided. Thin layer part 10
The length and thickness 1 are determined based on the solid content of the active material paste and the volume of the paste pool 7 formed between the nozzle 4 and the base material 2. The volume of the paste reservoir 7 is determined by the gap AA ′, the length of the tip of the nozzle 4, that is, the dimensions of L1 and L2 shown in FIG.
1. Determined by dimensions in L2 direction.

As an example of the embodiment, the gap A-
A 'is 0.4mm, L1 is 3mm, slit size is 1
mm, L2 is set to 3 mm, and the active material paste is applied intermittently on the current collector, dried, wound up, and the active material layer is also intermittently formed on the back side in the same manner to form a positive electrode and a negative electrode. An electrode plate was made. The thickness of the active material layer 1 after drying on only one side was 150 μm, and the thickness of the thin layer portion 101 was 80 μm. Thereafter, the resultant was cut into a predetermined width and length to prepare a battery electrode plate as shown in FIG. The length of L3 at this time is 10 mm or less. This was wound around a positive electrode 9, a negative electrode 10 and a separator 11 as shown in FIG. As a result, the defective rate at the time of winding was 0%, and the active material layer was not peeled off from the current collector at the center of the winding, that is, at the portion where the radius of curvature of the electrode plate was smallest. Compared to a battery made of a conventional electrode having no thin layer portions at both ends of the active material layer, the electrode plate according to the present embodiment has the same inner and outer circumferences when it is wound because there is no waste. In this case, a large amount of active material could be sealed, and the battery capacity could be increased by 5%. From the above results, according to the present embodiment, it is possible to remarkably improve the process yield at the time of winding and to increase the battery capacity.

As described above, according to the present embodiment, the active material layers are formed on both surfaces of the current collector 2 in a fixed rectangular pattern, and the terminal portions of the active material layers in the running direction of the current collector. In this case, a thin layer portion of the active material layer can be formed. As a result, it is possible to provide a method for manufacturing a battery electrode plate with good process yield and excellent productivity, and by providing this method, it is possible to provide a high-quality battery electrode plate with a large battery capacity. .

In the present embodiment, the coating end portion of the active material layer in the current collector running direction is made thinner, but the coating start end portion, which is the opposite end portion, is not particularly limited. Instead, the starting end may be thicker than other active material layers, or may be an equivalent or thinner layer.

The means for stopping the discharge of the active material paste from the nozzle 4 is not particularly limited. For example, an electromagnetic valve is provided in the active material paste supply pipe up to the nozzle 4 and the timer is set. Nozzle 4 intermittently
There is a method of repeatedly supplying and stopping the active material paste to the substrate.

In each embodiment according to the present invention, a position restricting tool may be provided on the downstream side of the nozzle 4 in the current collector running direction or on both the upstream and downstream sides. In this case, the downstream position regulating tool regulates only the unnecessary portion on the current collector 2.

The position restricting device 5 is not particularly limited. For example, a pair of rotating rolls may be made of metal, resin, rubber, or the like, a fixed bar, or a flexible sheet. In short, it is only necessary that the current collector 2 be disposed so as to pass substantially at the center of the gap AA ′.

The active material paste used in the present embodiment is prepared by kneading the same electrode active material, conductive agent, binder, solvent and the like as in the first embodiment. In addition, a current collector similar to that in Embodiment 1 can be used.

In each embodiment according to the present invention, the nozzle 4 is an example of an embodiment of the coating means of the present invention.
The position restricting tool 5 is an example of an embodiment of the current collector-guided flattening means.

In each of the embodiments according to the present invention, the back roll 8 and the position restricting device 5 are an example of the implementation of the current collector guiding means of the present invention, and the electromagnetic type provided in the active material paste supply pipe is provided. The valve is an example of the embodiment of the application amount adjusting means.

[0066]

As is apparent from the above description, according to the present invention, when the battery electrode plate is sealed in the cylindrical battery case, the active material layer is peeled off from the center of the current collector. In addition, the electrode plate can be easily wound, and the capacity of the cylindrical battery can be increased. As a result, battery performance, quality, and manufacturing yield can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a battery electrode plate according to a third embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing a battery electrode plate manufacturing apparatus according to a first embodiment of the present invention.

FIG. 3 shows a gap between nozzles of a battery electrode plate manufacturing apparatus according to the first and second embodiments of the present invention, and a battery electrode plate manufacturing apparatus used for manufacturing a battery electrode plate according to a third embodiment. It is a schematic sectional view showing the gap between nozzles of the above, and the gap between nozzles of the battery electrode board manufacturing device used for performing the battery electrode plate manufacturing method which is the seventh embodiment.

FIG. 4 is a schematic cross-sectional view showing a battery electrode plate manufacturing apparatus according to a second embodiment of the present invention and a battery electrode plate manufacturing apparatus used for manufacturing a battery electrode plate according to a third embodiment. is there.

FIG. 5 is a schematic cross-sectional view illustrating a battery electrode plate manufactured using a battery electrode plate manufacturing method according to a fourth embodiment of the present invention and a battery electrode plate according to a sixth embodiment.

FIG. 6 is a schematic sectional view showing a battery electrode plate manufacturing apparatus used for carrying out a battery electrode plate manufacturing method according to a fourth embodiment of the present invention.

FIG. 7 is a schematic perspective view showing a battery electrode plate manufactured by using a battery electrode plate manufacturing method according to a fourth embodiment of the present invention.

FIG. 8 shows a battery using a battery electrode plate manufactured using the battery electrode plate manufacturing method according to the fourth and seventh embodiments of the present invention, and a battery electrode plate manufacturing apparatus according to the fifth embodiment. It is a schematic perspective view which shows the structure using the battery electrode plate manufactured using the above, and the battery using the battery electrode plate which is the 6th Embodiment.

FIG. 9 is a schematic sectional view showing a battery electrode plate manufacturing apparatus according to a fifth embodiment of the present invention.

FIG. 10 is a schematic perspective view of a battery electrode plate manufactured using a battery electrode plate manufacturing apparatus according to a fifth embodiment of the present invention.

FIG. 11 is a schematic sectional view of a battery electrode plate according to a sixth embodiment of the present invention.

FIG. 12 is a schematic sectional view illustrating a method for manufacturing a battery electrode plate according to a seventh embodiment of the present invention.

FIG. 13 is a schematic perspective view illustrating a battery electrode plate manufacturing method according to a seventh embodiment of the present invention.

FIG. 14 is a schematic sectional view illustrating a method for manufacturing a battery electrode plate according to a seventh embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Active material layer 2 Current collector 3 Active material layer in a wet state 4 Nozzle 5 Position control tool 6 Active material paste 7 Paste accumulation 8 Back roll 9 Positive electrode 10 Negative electrode 11 Separator 12 Case

Claims (35)

[Claims] An application means for discharging and applying an active material, and a surface of the current collector running in a predetermined direction so that the active material is applied to a predetermined position on the current collector by a predetermined thickness. And a current collector guiding flattening means for flattening the current collector and guiding the current collector. 2. The apparatus for manufacturing a battery electrode plate according to claim 1, wherein the current collector guiding flattening means guides the current collector by sandwiching the current collector between a rigid object and an elastic body. 3. A coating means comprising a pair of nozzles facing each other with a predetermined gap therebetween, and wherein said active material is applied to both surfaces of said current collector running through said gap. 2. The apparatus for producing a battery electrode plate according to claim 1. 4. The current collector guiding flattening means guides the current collector so that the current collector passes substantially the center of the gap between the pair of opposed nozzles. The battery electrode plate manufacturing apparatus according to claim 3. 5. An application device for discharging and applying an active material, wherein the active material is applied to a predetermined position on a current collector.
A battery electrode comprising: current collector guiding means for guiding the current collector traveling in a certain direction; and an application amount adjusting means for adjusting an application amount of the active material on the current collector. Plate manufacturing equipment. 6. The apparatus according to claim 5, wherein the coating amount adjusting means forms a thin layer portion having a small coating thickness. 7. The battery electrode plate manufacturing according to claim 6, wherein the portion of the current collector where the thin layer portion is formed is a coating start portion and / or a coating end portion in the fixed direction. apparatus. 8. A coating means comprising a pair of nozzles facing each other with a predetermined gap therebetween, and the active material is applied to both surfaces of the current collector running through the gap. 8. The apparatus for manufacturing a battery electrode plate according to 7. 9. The current collector inducing means guides the current collector such that the current collector passes substantially at the center of the gap between the pair of nozzles facing each other. 9. The battery electrode plate manufacturing apparatus according to 8. 10. The battery electrode plate manufacturing apparatus according to claim 3, wherein the gap is within a range of 0.1 mm or more and 3 mm or less. 11. The nozzle according to claim 4, wherein the substantially center of the gap of the nozzle is within a range of １ ／ to ／ of an interval of the gap from one of the nozzle tips. 10. The apparatus for manufacturing a battery electrode plate according to any one of claims 9 to 9. 12. The flattening device according to claim 1, further comprising a current-collector-guided flattening means provided upstream and / or downstream of the coating means in the predetermined direction in which the current collector travels. Battery electrode plate manufacturing equipment. 13. The current collector-guided flattening means provided on the upstream side of the coating means discharges an active material from a position where the surface of the current collector is flattened. The apparatus for producing a battery electrode plate according to any one of claims 1 to 3, wherein a distance to a position where the electrode is applied is 200 mm or less. 14. The battery electrode plate manufacturing apparatus according to claim 6, wherein a length of the thin layer portion in the predetermined direction is in a range of 0.5 mm or more and 50 mm or less. 15. The method according to claim 7, wherein a thickness of the thin layer portion is in a range of 10% to 90% with respect to a coating thickness of a portion other than the thin layer portion. Battery electrode plate manufacturing equipment. 16. The battery electrode plate manufacturing apparatus according to claim 1, wherein the battery electrode plate is manufactured for a cylindrical battery. 17. An application step of discharging an active material from a nozzle and applying the active material on a current collector, and applying the active material in a predetermined direction so that the active material is applied to a predetermined position on the current collector by a predetermined thickness. Performing a combination of a current collector guiding flattening step of flattening the surface of the running current collector and guiding the current collector, and a coating pause step of stopping the coating without discharging an active material from a nozzle. A method for producing a battery electrode plate. 18. The method according to claim 17, wherein the nozzle is a pair of nozzles facing each other with a predetermined gap, and the active material is applied to both surfaces of the current collector running through the gap. Battery electrode plate manufacturing method. 19. The method of guiding a current collector is to guide the current collector such that the current collector passes substantially at the center of the gap between the pair of nozzles facing each other. The method for manufacturing a battery electrode plate according to claim 18, wherein 20. A coating continuation step of discharging an active material from a nozzle and continuously applying the active material by a predetermined thickness onto a current collector traveling in a fixed direction, and applying the active material while adjusting an application amount of the active material. A method for producing a battery electrode plate, characterized in that the step of adjusting the amount and the step of suspending the application for suspending the application are performed in combination. 21. The coating amount adjusting step includes, before the start of the coating continuation step, gradually increasing the coating amount to the predetermined thickness to connect to the coating continuation step and / or to terminate the coating continuation step. 21. The method for manufacturing a battery electrode plate according to claim 20, wherein the thin layer portion is formed by gradually decreasing the coating amount subsequently. 22. The method according to claim 21, wherein the nozzles are a pair of nozzles facing each other with a predetermined gap, and the active material is applied to both surfaces of the current collector running through the gap. Battery electrode plate manufacturing method. 23. The battery electrode according to claim 19, wherein the current collector passes from the tip of one of the nozzles within a range of not less than 1/4 and not more than 3/4 of the gap between the nozzles. Board manufacturing method. 24. The method for manufacturing a battery electrode plate according to claim 18, wherein the gap is within a range of 0.1 mm or more and 3 mm or less. 25. The current collector-induced flattening step is performed on an upstream side and / or a downstream side of the nozzle in the predetermined direction in which the current collector runs.
The method for producing a battery electrode plate according to the above. 26. A position from the position where the surface of the current collector is flattened by the current collector-induced flattening step on the upstream side of the nozzle to the position where the active material is coated on the current collector by the coating step 26. The method for manufacturing a battery electrode plate according to claim 25, wherein the distance is 200 mm or less. 27. The method for manufacturing a battery electrode plate according to claim 21, wherein the length of the thin layer portion in the predetermined direction is in a range of 0.5 mm or more and 50 mm or less. 28. The method according to claim 21, wherein the thickness of the thin layer portion is in a range of 10% or more and 90% or less with respect to the predetermined thickness of the active material layer. . 29. The method for producing a battery electrode plate according to claim 17, which is a method for producing a battery electrode plate for a cylindrical battery. 30. One or both ends in the longitudinal direction of the active material layer coated on the current collector by a predetermined thickness,
A battery electrode plate, wherein a thin layer portion having a thin coating of the active material is formed. 31. The active material is applied to both sides of the current collector, and one applied thickness is 50% or more of the other applied thickness.
A battery electrode plate having a thickness of 0% or less. 32. A length of the thin layer portion in a longitudinal direction of the electrode plate is 0.5.
32. The battery electrode plate according to claim 31, which is in a range of not less than 50 mm and not more than 50 mm. 33. The battery electrode plate according to claim 32, wherein the thickness of the thin layer portion is in a range from 10% to 90% with respect to the predetermined thickness of the active material layer. 34. The battery electrode plate according to claim 32, wherein the thickness of the thin layer portion is in a range of 50% or more and 90% or less with respect to the predetermined thickness of the active material layer. 35. The battery electrode plate according to claim 30, which is used for a cylindrical battery.