Electrode manufacturing fixture

Abstract

To completely dry an electrode material in a short time.SOLUTION: An electrode manufacturing jig 20 comprises: a plurality of mounting stages 21 each including a first surface 21a on which an electrode material 15 is mounted and a second surface 21b which is positioned oppositely to the first surface 21a in a gravity direction X, and being separated from each other in the gravity direction X; and a shield part 22 positioned between the electrode material 15 mounted on the first surface 21a of the mounting stage 21, which is lower in the gravity direction X, between the mounting stages 21 adjacent to each other in the gravity direction X, and the second surface 21b of the mounting stage 21 which is upper in the gravity direction X. When a region to mount the electrode material 15 in the first surface 21a is defined as a mounting region, a penetration hole 21h penetrating between the first surface 21a and the second surface 21b is positioned in the mounting region of the mounting stage 21. The shield part 22 covers the penetration hole 21h from the side of the second surface 21b of the mounting stage 21.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a jig for manufacturing an electrode. [Background technology]

[0002] It is known that, in the manufacture of an electrode, an electrode material in which an active material mixture containing an active material is applied to a current collector is dried. For example, Patent Document 1 discloses a method for drying a plurality of electrode materials at once. In this method, electrode materials in which the active material mixture applied to the current collector has different polarities are alternately stacked with a separator interposed therebetween to form a laminate. The laminate is heated while being pressurized from both sides in the stacking direction of the laminate. This allows the active material mixture of the electrode material to be dried. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-71178 A Summary of the Invention [Problem to be solved by the invention]

[0004] According to the drying method disclosed in the above-mentioned Patent Document 1, the laminate is pressurized, so that the active material mixture is in a state of being pressed against the separator. Therefore, it is difficult for moisture to evaporate from the active material mixture pressed against the separator. Therefore, it may take a long time to complete drying of the electrode material. [Means for solving the problem]

[0005] The electrode manufacturing jig that solves the above problem is an electrode manufacturing jig used for drying an electrode material having active material mixtures of different polarities coated on one side and the other side of a current collector, the jig comprising: a plurality of mounting tables arranged apart from each other in the direction of gravity, each having a first side on which the electrode material is placed and a second side positioned opposite the first side in the direction of gravity; and a shielding portion positioned between the electrode material placed on the first side of the mounting table below in the direction of gravity and the second side of the mounting table above in the direction of gravity, among the mounting tables adjacent to each other in the direction of gravity, and a mounting area in which the electrode material is placed, the mounting area having a through hole penetrating between the first side and the second side, and the shielding portion covering the through hole from the second side side of the mounting table.

[0006] According to the above configuration, the mounting table is located between the electrode materials in the gravity direction. The through-hole is located in the mounting area of ​​the mounting table on which the electrode material is placed. Therefore, moisture in the active material mixture applied to the electrode material is easily evaporated through the through-hole. Therefore, the drying of the electrode material can be completed in a short time. In addition, the shielding portion covers the through-hole from the second surface side of the mounting table. Therefore, for example, when active material mixtures of different polarities face each other between the electrode materials placed on the adjacent mounting tables, even if the active material that has fallen from the active material mixture applied to the electrode material falls to the bottom of the mounting table through the through-hole of the mounting table, the active material is received by the shielding portion. Therefore, it is possible to suppress the active material of different polarity from adhering to the active material mixture applied to the electrode material.

[0007] In the jig for manufacturing an electrode, the shielding portion may be a metal plate spaced apart from the second surface in the direction of gravity. According to the above-mentioned configuration, since the shielding portion is a metal plate, the shielding portion can be easily cleaned. Even if the active material that has fallen from the electrode material placed on the mounting table adheres to the shielding portion through the through-hole, the same shielding portion can be repeatedly used in drying the electrode material multiple times by cleaning the shielding portion.

[0008] In the jig for manufacturing an electrode, the shielding portion may be a nonwoven fabric having air permeability. According to the above configuration, the cost of the shielding part can be reduced compared to when the shielding part is a metal plate. Therefore, even if the active material that has fallen from the electrode material placed on the mounting table adheres to the shielding part through the through-hole, the shielding part can be replaced in a shorter cycle than when the shielding part is a metal plate.

[0009] In the electrode manufacturing jig, the electrode material is placed on the mounting table so that the active material mixture containing carbon is in contact with the mounting area, and the mounting area may be coated with graphite.

[0010] According to the above configuration, since the coating layer of the mounting area is made of carbon, even if the coating agent of the mounting table adheres to the active material mixture of the electrode material, the components of the active material mixture are unlikely to be affected. Furthermore, the graphite coating can increase the thermal conductivity of the mounting area. Therefore, the electrode material placed on the mounting area can be efficiently heated.

[0011] In an electrode manufacturing jig, the mounting table may have a first recess and a second recess recessed in the direction of gravity, the first recess having a first bottom surface and a first side surface extending from a periphery of the first bottom surface, the second recess having a second bottom surface and a second side surface extending from a periphery of the second bottom surface, and being recessed from the first bottom surface in the direction of gravity, and the mounting area may be located on the first bottom surface and the second bottom surface.

[0012] According to the above configuration, a large electrode material can be placed on the first bottom surface. When the electrode material placed on the first bottom surface is displaced on the first bottom surface, the electrode material abuts against the first side surface, thereby suppressing misalignment of the electrode material in the first recess. A small electrode material can be placed on the second bottom surface. When the electrode material placed on the second bottom surface is displaced on the second bottom surface, the electrode material abuts against the second side surface, thereby suppressing misalignment of the electrode material in the second recess. Therefore, electrode materials of different sizes can be placed on the mounting table, and misalignment of electrode materials of different sizes on the mounting table can be suppressed.

[0013] In a jig for manufacturing electrodes, the jig has a plurality of support parts that support a plurality of mounting tables so that the mounting tables are spaced apart from each other in the direction of gravity, and when the mounting tables among the plurality of mounting tables excluding the mounting table located at the bottom in the direction of gravity are defined as upper mounting tables, the support parts are provided for each upper mounting table and extend in the direction of gravity between adjacent mounting tables in the direction of gravity, and the support part located at the bottom among the plurality of support parts in the direction of gravity has a larger cross-sectional area in a cross section perpendicular to the direction of gravity than the other support parts.

[0014] In the above configuration, the load of the mounting table located above the support part and the load of the electrode material placed on the mounting table act on the support part. The lower the support part is located in the direction of gravity, the greater the load acting on the support part. Therefore, the load acting on the support part is greatest in the support part located at the bottom in the direction of gravity among the multiple support parts. According to the above configuration, the support part located at the bottom in the direction of gravity among the multiple support parts has a larger cross-sectional area in a cross section perpendicular to the direction of gravity than the other support parts. Therefore, the rigidity against the acting load can be increased in the support part located at the bottom in the direction of gravity among the multiple support parts.

[0015] In a jig for manufacturing an electrode, if the mounting table located at the bottom in the direction of gravity among the multiple mounting tables is defined as a lower mounting table, and the mounting tables other than the lower mounting table are defined as upper mounting tables, the jig may include a plurality of support parts supporting the multiple mounting tables so that the multiple mounting tables are separated from each other in the direction of gravity, and a support shaft located on the lower mounting table and extending in the direction of gravity, wherein the support part is provided for each of the upper mounting tables and has a cylindrical shape extending in the direction of gravity between adjacent mounting tables in the direction of gravity, the upper mounting table may have a communication hole that communicates with the support hole of the support part, and the support shaft may be inserted through the support hole and the communication hole.

[0016] According to the above configuration, the support shaft is inserted into the support hole and the communication hole, so that the support portion and the upper mounting table are supported by the lower mounting table, which makes it possible to prevent the upper mounting table from falling off the lower mounting table when the jig is moved, compared to a case in which the lower mounting table does not have the support shaft.

[0017] In a jig for manufacturing an electrode, the jig may include a moving mechanism capable of moving a plurality of mounting stages between a first position and a second position that are offset from each other in a first direction that is a direction parallel to the first surface, and the mounting area of ​​the mounting stage at the first position and the mounting area of ​​the mounting stage at the second position may not overlap in the direction of gravity.

[0018] When the drying of the electrode material using the jig for manufacturing the electrode is completed, the electrode, which is the electrode material after drying, is sucked and the electrode is taken out from the mounting table. At this time, if a plurality of mounting tables are stacked in the direction of gravity, another mounting table will be located above the electrode placed on the mounting table. Therefore, when taking out the electrode from the mounting table, it is necessary to remove the mounting table located above the mounting table on which the electrode is placed from the jig. The mounting tables are removed from the jig in order from the mounting table located at the top in the direction of gravity. Therefore, the order in which the electrodes are taken out from the mounting tables is limited. According to the above configuration, by moving one mounting table to the first position and positioning the other mounting tables at the second position, the other mounting tables are not located above the electrode placed on the mounting table located at the first position. Therefore, the electrode can be taken out from the mounting table by utilizing the space above the mounting table located at the first position. The movement of the mounting table from the second position to the first position and the removal of the electrodes from the mounting table can be performed in the order of the electrodes to be removed, which prevents the order in which the electrodes are removed from the mounting table from being restricted by the order in which the electrode materials are placed on the mounting table. Effect of the Invention

[0019] According to the present invention, the drying of the electrode material can be completed in a short period of time. [Brief description of the drawings]

[0020] [Figure 1] FIG. [Diagram 2] FIG. 2 is a cross-sectional view of a jig for manufacturing an electrode in the first embodiment. [Diagram 3] FIG. 2 is a cross-sectional view of a jig for manufacturing an electrode in the first embodiment. [Figure 4] 2 is a cross-sectional view of an upper stage in the first embodiment. FIG. [Diagram 5] FIG. 4 is a cross-sectional view for explaining stacking of mounting tables in the first embodiment. [Figure 6] FIG. 4 is a cross-sectional view for explaining stacking of mounting tables in the first embodiment. [Figure 7] FIG. 11 is a cross-sectional view of a jig for manufacturing an electrode in a second embodiment. [Figure 8] FIG. 11 is a cross-sectional view of a jig for manufacturing an electrode in a second embodiment. [Figure 9] 13 is a cross-sectional view for explaining movement of a mounting table in the second embodiment. FIG. [Figure 10] 13 is a cross-sectional view for explaining movement of a mounting table in the second embodiment. FIG. [Figure 11] 13 is a cross-sectional view for explaining movement of a mounting table in the second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] First Embodiment A first embodiment of a jig for manufacturing an electrode will be described below with reference to Figures 1 to 6. Hereinafter, the jig for manufacturing an electrode will be simply referred to as a jig. Hereinafter, the electrodes and electrode materials will be described first.

[0022] [Electrode configuration] As shown in FIG. 1, the electrode 10 includes a current collector 11, a positive electrode active material layer 12a, and a negative electrode active material layer 12b. The current collector 11 is a rectangular sheet-like metal foil. The positive electrode active material layer 12a is an active material layer 12 present on one side of the current collector 11. The negative electrode active material layer 12b is an active material layer 12 present on the other side of the current collector 11. That is, the electrode 10 includes active material layers 12 of different polarities on one and the other sides of the current collector 11. The positive electrode active material layer 12a and the negative electrode active material layer 12b may be positioned in a rectangular shape on the current collector 11.

[0023] The peripheral portion of the current collector 11 is an uncoated region where the positive electrode active material layer 12a and the negative electrode active material layer 12b are not coated. The area where the positive electrode active material layer 12a is formed on one surface of the current collector 11 is the same size as the area where the negative electrode active material layer 12b is formed on the other surface of the current collector 11. The area where the positive electrode active material layer 12a is formed on one surface of the current collector 11 may be slightly smaller than the area where the negative electrode active material layer 12b is formed on the other surface of the current collector 11. In this case, the peripheral portion of the negative electrode active material layer 12b is located outside the peripheral portion of the positive electrode active material layer 12a.

[0024] [Electrode material composition] As shown in FIG. 2, the jig 20 is used to dry a plurality of electrode materials 15. The electrode material 15 is a precursor of the electrode 10. The electrode material 15 is formed by coating one surface and the other surface of the current collector 11 with active material mixtures of different polarities. The active material mixture is a paste in which an active material, a conductive agent, a binder, and a solvent are mixed. In the electrode material 15, a positive electrode precursor layer 14a made of an active material mixture containing a positive electrode active material is located on one surface of the current collector 11. In the electrode material 15, a negative electrode precursor layer 14b made of an active material mixture containing a negative electrode active material is located on the other surface of the current collector 11. The positive electrode precursor layer 14a is a precursor of the positive electrode active material layer 12a. The negative electrode precursor layer 14b is a precursor of the negative electrode active material layer 12b. By drying the electrode material 15 using the jig 20, the paste-like positive electrode precursor layer 14a is dried to become the positive electrode active material layer 12a, and the paste-like negative electrode precursor layer 14b is dried to become the negative electrode active material layer 12b, thereby producing the electrode 10.

[0025] Current collector 11 is formed by bonding copper foil and aluminum foil together. Current collector 11 may be aluminum foil with copper plating on one side. Current collector 11 may be formed as a single sheet of one type of metal material.

[0026] The positive electrode active material and the negative electrode active material can absorb and release lithium ions as charge carriers. Examples of the positive electrode active material include polyanion compounds such as olivine-type lithium iron phosphate (LiFePO4), lithium composite metal oxides having a layered rock salt structure, and metal oxides having a spinel structure. The positive electrode active material is one that can be used as a positive electrode active material for a power storage device such as a lithium ion secondary battery.

[0027] In this embodiment, carbon is used as the negative electrode active material. Examples of carbon include natural graphite, artificial graphite, hard carbon (hardly graphitizable carbon), and soft carbon (easily graphitizable carbon). Examples of artificial graphite include highly oriented graphite and mesocarbon microbeads. Examples of elements that can be alloyed with lithium include silicon and tin.

[0028] By using the jig 20, a plurality of electrode materials 15 of different sizes can be dried. In this embodiment, the jig 20 can be used to dry three sizes of electrode materials 15. The electrode materials 15 of different sizes are referred to as a first electrode material 15a, a second electrode material 15b, and a third electrode material 15c. The first electrode material 15a, the second electrode material 15b, and the third electrode material 15c are different in size as viewed in the thickness direction of the electrode material 15, that is, at least one of the width and the length. In these electrode materials 15, the current collector 11, the positive electrode precursor layer 14a, and the negative electrode precursor layer 14b are in a relationship in which the first electrode material 15a, the second electrode material 15b, and the third electrode material 15c are smaller in size in that order. The thicknesses of the current collector 11, the positive electrode precursor layer 14a, and the negative electrode precursor layer 14b may be the same for the first electrode material 15a, the second electrode material 15b, and the third electrode material 15c, or may be different from each other.

[0029] [Basic configuration of the jig in the first embodiment] The jig 20 includes a plurality of mounting tables 21 and a shielding portion 22. The jig 20 further includes a plurality of supporting portions 23 and a supporting shaft 24.

[0030] [Configuration of the mounting table] Each of the multiple mounting tables 21 has a first surface 21a and a second surface 21b. In the drawings, the X-axis is illustrated as an axis extending in a direction perpendicular to the first surface 21a. In the drawings, the Y-axis and the Z-axis are illustrated as axes perpendicular to the X-axis and perpendicular to each other. The gravity direction is a direction parallel to the X-axis. Hereinafter, the gravity direction is referred to as the gravity direction X. Hereinafter, the top and bottom in the gravity direction X are also simply referred to as "upper" and "lower". The first surface 21a and the second surface 21b are planes perpendicular to the gravity direction X. The second surface 21b is located opposite the first surface 21a in the gravity direction X. The multiple mounting tables 21 are arranged apart from each other in the gravity direction X. The interval between the mounting tables 21 in the gravity direction X is greater than the thickness of the electrode material 15.

[0031] 3, the outer shape of the mounting table 21 is rectangular when viewed from the gravity direction X. In the outer shape of the mounting table 21, the short side direction is parallel to the Y axis, and the long side direction is parallel to the Z axis. Hereinafter, the short side direction in the outer shape of the mounting table 21 will be referred to as the first direction Y, and the long side direction will be referred to as the second direction Z.

[0032] 2, the electrode material 15 is placed on the first surface 21a of each of the multiple mounting tables 21. Among the mounting tables 21 adjacent to each other in the direction of gravity X, the electrode material 15 placed on the first surface 21a of the mounting table 21 on the lower side in the direction of gravity X is separated in the direction of gravity X from the mounting table 21 on the upper side in the direction of gravity X.

[0033] The mounting table 21 has a first recess 41 and a second recess 42 recessed in the direction of gravity X. Furthermore, the mounting table 21 of this embodiment has a third recess 43 recessed in the direction of gravity X. Of the multiple mounting tables 21, the mounting table 21 located at the bottom in the direction of gravity X is referred to as a lower mounting table 31, and the mounting tables 21 other than the lower mounting table 31 are referred to as an upper mounting table 32.

[0034] The first recess 41 includes a first bottom surface 41a and a first side surface 41b extending from the periphery of the first bottom surface 41a. The second recess 42 includes a second bottom surface 42a and a second side surface 42b extending from the periphery of the second bottom surface 42a. The third recess 43 includes a third bottom surface 43a and a third side surface 43b extending from the periphery of the third bottom surface 43a. The second recess 42 is recessed from the first bottom surface 41a in the direction of gravity X. The third recess 43 is recessed from the second bottom surface 42a in the direction of gravity X.

[0035] 3, the first bottom surface 41a, the second bottom surface 42a, and the third bottom surface 43a extend perpendicular to the gravity direction X. When the mounting table 21 is viewed from the gravity direction X, the third bottom surface 43a is located at the center of the mounting table 21. When the mounting table 21 is viewed from the gravity direction X, the second bottom surface 42a surrounds the third bottom surface 43a and is located outside the third bottom surface 43a. The first bottom surface 41a surrounds the second bottom surface 42a and is located outside the second bottom surface 42a.

[0036] The third bottom surface 43a has a rectangular shape with its longitudinal sides extending in the second direction Z in a plan view seen from the gravity direction X. The first bottom surface 41a and the second bottom surface 42a have a rectangular frame shape with its longitudinal sides extending in the second direction Z in a plan view seen from the gravity direction X.

[0037] In a plan view seen from the gravity direction X, the size of the first bottom surface 41a is slightly larger than the size of the current collector 11 of the first electrode material 15a. The size of the second bottom surface 42a is slightly larger than the size of the current collector 11 of the second electrode material 15b and slightly smaller than the size of the first electrode material 15a. The size of the third bottom surface 43a is slightly larger than the size of the current collector 11 of the third electrode material 15c and slightly smaller than the size of the second electrode material 15b.

[0038] 2, the dimension of the first side surface 41b in the gravity direction X may be equal to or greater than the thickness of the first electrode material 15a. The dimension of the second side surface 42b in the gravity direction X may be equal to or greater than the thickness of the second electrode material 15b. The dimension of the third side surface 43b in the gravity direction X may be equal to or greater than the thickness of the third electrode material 15c.

[0039] The third side surface 43b connects the third bottom surface 43a and the second bottom surface 42a. The second side surface 42b connects the second bottom surface 42a and the first bottom surface 41a. The first side surface 41b connects the first bottom surface 41a and the outer peripheral surface 21c of the mounting table 21. The outer peripheral surface 21c is a portion of the first surface 21a that surrounds the first bottom surface 41a and is located outside the first bottom surface 41a when the mounting table 21 is viewed from the gravity direction X. The outer peripheral surface 21c has a rectangular frame shape with its longitudinal sides extending in the second direction Z in a plan view viewed from the gravity direction X. The first surface 21a of this embodiment is composed of the outer peripheral surface 21c, the first bottom surface 41a, the second bottom surface 42a, and the third bottom surface 43a.

[0040] 3, an area of ​​the first surface 21a where the electrode material 15 is placed is defined as a placement area 45. The placement area 45 refers to an area of ​​the first surface 21a with which the electrode material 15 placed on the first surface 21a comes into contact. The placement area 45 is located on each of the first bottom surface 41a, the second bottom surface 42a, and the third bottom surface 43a. That is, the electrode material 15 can be placed on each of the first bottom surface 41a, the second bottom surface 42a, and the third bottom surface 43a.

[0041] The mounting area 45 located on the first bottom surface 41a is referred to as the first mounting area 45a. The mounting area 45 located on the second bottom surface 42a is referred to as the second mounting area 45b. The mounting area 45 located on the third bottom surface 43a is referred to as the third mounting area 45c. In a plan view seen from the gravity direction X, the first mounting area 45a, the second mounting area 45b, and the third mounting area 45c are areas excluding the outer periphery from the first bottom surface 41a, the second bottom surface 42a, and the third bottom surface 43a, respectively.

[0042] 2, a first electrode material 15a can be placed on the first bottom surface 41a. The first electrode material 15a placed on the first bottom surface 41a is surrounded by a first side surface 41b. The first recess 41 accommodates the first electrode material 15a placed on the first bottom surface 41a.

[0043] The second electrode material 15b can be placed on the second bottom surface 42a. The second electrode material 15b placed on the second bottom surface 42a is surrounded by the second side surface 42b. The second recess 42 contains the second electrode material 15b placed on the second bottom surface 42a.

[0044] The third electrode material 15c can be placed on the third bottom surface 43a. The third electrode material 15c placed on the third bottom surface 43a is surrounded by the third side surface 43b. The third recess 43 accommodates the third electrode material 15c placed on the third bottom surface 43a.

[0045] By storing the electrode material 15 in any one of the first recess 41, the second recess 42, and the third recess 43, one of the first electrode material 15a, the second electrode material 15b, and the third electrode material 15c is placed on each of the mounting tables 21.

[0046] 2 or 3, in each of the multiple mounting tables 21, the electrode material 15 is mounted on the first surface 21a such that the negative electrode precursor layer 14b of the electrode material 15 contacts the mounting region 45. In other words, the electrode material 15 is mounted on the multiple mounting tables 21 such that the active material mixture containing carbon contacts the mounting region 45.

[0047] As shown in Fig. 4, in each of the multiple mounting tables 21, a graphite coating is applied to the entire surface of the mounting table 21, including the first surface 21a and the second surface 21b. A coating layer 35 is located on the surface of each of the multiple mounting tables 21. Note that, although Fig. 4 illustrates the upper mounting table 32 having a graphite coating applied to its surface, the lower mounting table 31 may also have a graphite coating applied to its surface. As a result, the mounting region 45 of each of the multiple mounting tables 21 is coated with graphite.

[0048] As shown in FIG. 2 or 3, the upper mounting table 32 has a communication hole 21i. The communication hole 21i penetrates between the outer peripheral surface 21c and the second surface 21b of the upper mounting table 32 in the gravity direction X. A plurality of communication holes 21i may be located in each of the upper mounting tables 32. In this embodiment, six communication holes 21i are provided in each of the upper mounting tables 32. Three communication holes 21i are located on each side of the first recess 41 in the first direction Y. On each of the first recess 41 and the other side in the first direction Y, the three communication holes 21i are located spaced apart from each other in the second direction Z.

[0049] 3 or 4, a through hole 21h is located in the mounting area 45 of the upper mounting table 32. The through hole 21h penetrates in the gravity direction X between the first surface 21a and the second surface 21b. The through hole 21h is located throughout the first bottom surface 41a, the second bottom surface 42a, and the third bottom surface 43a. As a result, the through hole 21h is located in the first mounting area 45a, the second mounting area 45b, and the third mounting area 45c.

[0050] [Support structure] 2, the support portion 23 is provided for each upper mounting table 32. The support portion 23 extends in the gravity direction X between adjacent mounting tables 21 in the gravity direction X. The support portion 23 may be fixed to the second surface 21b of the upper mounting table 32 and extend from the second surface 21b in the gravity direction X. The support portion 23 supports the multiple mounting tables 21 such that the multiple mounting tables 21 are spaced apart from each other in the gravity direction X.

[0051] 2 and 3, the support portion 23 of this embodiment has a tubular shape extending in the direction of gravity X. The support portion 23 of this embodiment has a cylindrical shape. A support hole 23h extending in the direction of gravity X is formed inside the support portion 23.

[0052] A plurality of support parts 23 may be provided on each of the plurality of upper mounting tables 32. In this embodiment, six support parts 23 are provided on each of the plurality of upper mounting tables 32. The communication hole 21i communicates with the support hole 23h. The six support parts 23 are provided on the upper mounting table 32 such that the communication hole 21i of each of the plurality of upper mounting tables 32 communicates with the support hole 23h.

[0053] 2, of the multiple supports 23, the support 23 located at the bottom in the direction of gravity X is referred to as a first support 23a, and the other support parts 23 are referred to as second support parts 23b. The first support 23a is provided between the upper support 32 located at the bottom in the direction of gravity X among the multiple upper support stages 32 and the lower support stage 31.

[0054] The diameter of the support hole 23h is the same in the first support portion 23a and the second support portion 23b. The outer diameter of the second support portion 23b is larger than the outer diameter of the first support portion 23a. Therefore, the cross-sectional area of ​​the first support portion 23a in a cross section perpendicular to the gravity direction X is larger than that of the second support portion 23b.

[0055] The end of the support part 23 fixed to the second surface 21b is referred to as the base end of the support part 23. The end of the support part 23 opposite to the base end of the support part 23 is referred to as the tip of the support part 23. When the upper mounting tables 32 are adjacent to each other in the gravity direction X, the tip of the second support part 23b provided on one upper mounting table 32 contacts the outer circumferential surface 21c of the other upper mounting table 32. The support hole 23h of the second support part 23b provided on one upper mounting table 32 communicates with the communication hole 21i of the other upper mounting table 32. When the upper mounting table 32 and the lower mounting table 31 are adjacent to each other in the gravity direction X, the tip of the first support part 23a provided on the upper mounting table 32 contacts the first surface 21a of the lower mounting table 31.

[0056] [Support shaft configuration] 2 or 3, the support shaft 24 is located on the lower mounting table 31. The support shaft 24 may be fixed to the first surface 21a of the lower mounting table 31 and extend from the first surface 21a in the gravity direction X. A plurality of support shafts 24 may be located on the lower mounting table 31. In this embodiment, six support shafts 24 are provided on the lower mounting table 31.

[0057] The support shaft 24 in this embodiment has a columnar shape extending in the gravity direction X. The support shaft 24 in this embodiment has a cylindrical shape. The outer diameter of the support shaft 24 is slightly smaller than the diameter of the support hole 23h. 2, in a state where the multiple mounting tables 21 are adjacent to each other in the gravity direction X, the support shaft 24 is inserted into the support hole 23h and the communication hole 21i of each of the multiple upper mounting tables 32. In all upper mounting tables 32 located above the lower mounting table 31, the support shaft 24 is inserted into the support hole 23h and the communication hole 21i of the support portion 23.

[0058] [Configuration of the shielding portion of the first embodiment] The shielding portion 22 is located between the electrode material 15 placed on the first surface 21a of the mounting table 21 located below in the direction of gravity X and the second surface 21b of the mounting table 21 located above in the direction of gravity X, among the mounting tables 21 adjacent to each other in the direction of gravity X. The shielding portion 22 is spaced apart from the second surface 21b in the direction of gravity X. The shielding portion 22 is also spaced apart from the electrode material 15 placed on the first surface 21a in the direction of gravity X. The shielding portion 22 in this embodiment is a metal plate.

[0059] The shielding portion 22 may be fixed to a plurality of supporting portions 23. In this case, for example, holes may be formed in the shielding portion 22, and the shielding portion 22 may be fixed to the supporting portions 23 in a state in which the supporting portions 23 are inserted through the holes.

[0060] 3, the shielding portion 22 may have a rectangular flat plate shape when viewed from the gravity direction X. When viewed from the gravity direction X, the shielding portion 22 may overlap the entire second surface 21b of the mounting table 21. The shielding portion 22 covers the through-hole 21h from the second surface 21b side of the mounting table 21.

[0061] [How to stack the platforms] 5, when drying the electrode material 15 using the jig 20, a plurality of mounting tables 21 are stacked. In stacking the plurality of mounting tables 21, the electrode material 15 is first placed on the lower mounting table 31. In this embodiment, a case where a first electrode material 15a is placed on the lower mounting table 31 is illustrated. The electrode material 15 is placed on the mounting table 21 by, for example, sucking the electrode material 15 from above using a robot hand or the like.

[0062] Next, one upper mounting stage 32 is stacked on the upper part of the lower mounting stage 31. At this time, the upper mounting stage 32 on which the electrode material 15 is placed may be stacked on the lower mounting stage 31. After the upper mounting stages 32 are stacked on the lower mounting stage 31, the electrode material 15 may be placed on the upper mounting stage 32. In this embodiment, a case where a third electrode material 15c is placed on the upper mounting stage 32 adjacent to the lower mounting stage 31 in the gravity direction X is illustrated.

[0063] When stacking the upper mounting table 32 on the lower mounting table 31, the upper mounting table 32 is displaced in the gravity direction X toward the lower mounting table 31 so that the support shaft 24 is inserted into the support hole 23h of the first support portion 23a. As a result, the support shaft 24 is inserted into the support hole 23h and the communication hole 21i. The tip of the support shaft 24 is exposed to the top of the upper mounting table 32 from the opening of the communication hole 21i in the outer circumferential surface 21c of the upper mounting table 32. When the tip of the first support portion 23a comes into contact with the first surface 21a of the lower mounting table 31, stacking of the upper mounting table 32 on the lower mounting table 31 is completed.

[0064] 6, when stacking of the upper mounting stage 32 on the lower mounting stage 31 is completed, another upper mounting stage 32 is stacked on top of this upper mounting stage 32. At this time, the upper mounting stage 32 on which the electrode material 15 is placed may be stacked on top of the upper mounting stage 32. After another upper mounting stage 32 is stacked on top of the upper mounting stage 32, the electrode material 15 may be placed on this upper mounting stage 32. In this embodiment, a case where a second electrode material 15b is placed on another upper mounting stage 32 stacked on the upper mounting stage 32 is illustrated.

[0065] When stacking another upper mounting table 32 on the upper mounting table 32, the upper mounting table 32 is displaced in the gravity direction X so that the support shaft 24 is inserted into the support hole 23h of the second support portion 23b. As a result, the support shaft 24 is inserted into the support hole 23h of the second support portion 23b and the communication hole 21i of the upper mounting table 32. The tip of the second support portion 23b comes into contact with the outer circumferential surface 21c of the upper mounting table 32 placed on the upper part of the lower mounting table 31. As a result, stacking of another upper mounting table 32 on the upper mounting table 32 is completed. By repeatedly stacking another upper mounting table 32 on the upper mounting table 32 in this manner, a plurality of upper mounting tables 32 are stacked on the upper part of the lower mounting table 31.

[0066] [How to dry electrode materials] Next, a method for drying the electrode material 15 using the jig 20 will be described. The jig 20, in which the multiple mounting tables 21 are stacked, is housed inside a drying furnace. In the drying furnace, hot air is applied to the jig 20, so that moisture evaporates from the positive electrode precursor layer 14a and the negative electrode precursor layer 14b of the electrode material 15. More specifically, hot air is flowed through the jig 20 in a direction intersecting the gravity direction X (for example, a first direction Y). As a result, the positive electrode precursor layer 14a is dried to form the positive electrode active material layer 12a. The negative electrode precursor layer 14b is dried to form the negative electrode active material layer 12b. An electrode 10 including the positive electrode active material layer 12a and the negative electrode active material layer 12b is formed.

[0067] When the drying of the electrode material 15 is completed, the jig 20 is removed from the drying furnace. Thereafter, the jig 20 is sequentially removed from the upper mounting table 32 located at the top of the jig 20. The electrode 10 is removed from the removed upper mounting table 32. The electrode 10 is removed from the lower mounting table 31. The electrode 10 is removed from the mounting table 21 by, for example, sucking the electrode 10 from above using a robot hand or the like.

[0068] [Operation of the first embodiment] Next, the operation of this embodiment will be described. In the jig 20, the mounting table 21 is located between the electrode materials 15. A through hole 21h is located in the mounting area 45 of the upper mounting table 32 on which the electrode material 15 is mounted. The hot air blown to the jig 20 in the drying furnace not only blows against the electrode material 15 placed on the mounting table 21, but also passes through the through hole 21h of the upper mounting table 32. Since the shielding portion 22 is located away from the second surface 21b of the upper mounting table 32, air can flow into the through hole 21h and be discharged from the through hole 21h through the area between the shielding portion 22 and the second surface 21b. When the hot air passes through the through hole 21h provided in the mounting area 45, moisture in the negative electrode precursor layer 14b in contact with the mounting area 45 of the mounting table 21 is easily evaporated. This makes it difficult for a difference to occur in the ease with which moisture in the active material mixture applied to electrode material 15 evaporates between one surface and the other surface of current collector 11 .

[0069] [Effects of the first embodiment] According to the first embodiment, the following effects can be obtained. (1-1) The mounting table 21 is located between the electrode materials 15 in the gravity direction X. The through-holes 21h are located in the mounting area 45 of the mounting table 21 on which the electrode material 15 is placed. Therefore, the moisture of the active material mixture applied to the electrode material 15 is easily evaporated through the through-holes 21h. Therefore, the drying of the electrode material 15 can be completed in a short time. In addition, the shielding portion 22 covers the through-holes 21h from the second surface 21b side of the mounting table 21. When active material mixtures of different polarities face each other between the electrode materials 15 placed on the adjacent mounting tables 21, even if an active material that has fallen from the active material mixture applied to the electrode material 15 falls to the lower part of the mounting table 21 through the through-holes 21h of the mounting table 21, the active material is received by the shielding portion 22. Therefore, it is possible to suppress the active material of a different polarity from adhering to the active material mixture applied to the electrode material 15.

[0070] (1-2) Since the shielding portion 22 is a metal plate, it is easy to clean the shielding portion 22. Even if the active material that has fallen from the electrode material 15 placed on the mounting table 21 adheres to the shielding portion 22 through the through-holes 21h, the same shielding portion 22 can be repeatedly used in drying the electrode material 15 multiple times by cleaning the shielding portion 22.

[0071] (1-3) The electrode material 15 is placed on the mounting table 21 so that the active material mixture containing carbon comes into contact with the mounting area 45. The mounting area 45 is graphite coated. Therefore, since the coating layer 35 of the mounting area 45 is made of carbon, even if the coating agent of the mounting table 21 adheres to the active material mixture of the electrode material 15, the components of the active material mixture are unlikely to be affected. Furthermore, the graphite coating can increase the thermal conductivity of the mounting area 45. Therefore, the electrode material 15 placed on the mounting area 45 can be efficiently heated.

[0072] (1-4) The first recess 41 and the second recess 42 are located on the mounting table 21. The first electrode material 15a, which is larger than the second electrode material 15b, can be mounted on the first bottom surface 41a. When the first electrode material 15a mounted on the first bottom surface 41a is displaced on the first bottom surface 41a, the first electrode material 15a abuts against the first side surface 41b, thereby suppressing the displacement of the first electrode material 15a in the first recess 41. The second electrode material 15b, which is smaller than the first electrode material 15a, can be mounted on the second bottom surface 42a. When the second electrode material 15b mounted on the second bottom surface 42a is displaced on the second bottom surface 42a, the second electrode material 15b abuts against the second side surface 42b, thereby suppressing the displacement of the second electrode material 15b in the second recess 42. Therefore, the electrode materials 15 of different sizes can be placed on the placement table 21, and the positional deviation of the electrode materials 15 of different sizes on the placement table 21 can be suppressed.

[0073] (1-5) The jig 20 includes a plurality of support parts 23 that support the plurality of mounting tables 21 so that the plurality of mounting tables 21 are spaced apart from each other in the direction of gravity X. The load of the mounting table 21 located above the support parts 23 and the load of the electrode material 15 placed on the mounting table 21 act on the support parts 23. The load acting on the support parts 23 increases as the support parts 23 are positioned lower in the direction of gravity X. Therefore, the load acting on the support parts 23 becomes maximum on the support parts 23 that are positioned at the bottom in the direction of gravity X among the plurality of support parts 23. According to the above embodiment, the first support part 23a that is positioned at the bottom in the direction of gravity X among the plurality of support parts 23 has a larger cross-sectional area in a cross section perpendicular to the direction of gravity X than the second support part 23b that is the other support part 23. Therefore, the rigidity of the first support part 23a against the load acting thereon can be increased.

[0074] (1-6) The jig 20 is provided with a support shaft 24 located on the lower mounting base 31 and extending in the direction of gravity X. A communication hole 21i that communicates with the inside of the support portion 23 is located on the upper mounting base 32. The support shaft 24 is inserted into the inside of the support portion 23 and the communication hole 21i, so that the support portion 23 and the upper mounting base 32 are supported on the lower mounting base 31. Therefore, compared to a case in which the lower mounting base 31 does not have the support shaft 24, it is possible to prevent the upper mounting base 32 from falling off the lower mounting base 31 when the jig 20 moves.

[0075] <Second embodiment> A second embodiment of the jig will be described below with reference to Figs. 7 to 11. Jig 20 in the second embodiment differs from jig 20 in the first embodiment in that shielding portion 22 is not a metal plate, that jig 20 does not include support portion 23 and support shaft 24, and that jig 20 includes a movement mechanism for moving multiple mounting tables 21. Below, jig 20 in the second embodiment will be described with a focus on the differences from the first embodiment. Below, descriptions of configurations similar to those in the first embodiment will be omitted as appropriate.

[0076] [Basic configuration of the jig in the second embodiment] As shown in FIG. 7 or FIG. 8, in the same manner as in the first embodiment, the first recess 41, the second recess 42, and the third recess 43 are located in the multiple mounting tables 21 in the jig 20 in this embodiment. The first electrode material 15a can be placed in the first mounting area 45a of the first bottom surface 41a. The second electrode material 15b can be placed in the second mounting area 45b of the second bottom surface 42a. The third electrode material 15c can be placed in the third mounting area 45c of the third bottom surface 43a. One of the first electrode material 15a, the second electrode material 15b, and the third electrode material 15c is placed on each of the mounting tables 21. In each mounting area 45 of the multiple mounting tables 21, a through hole 21h penetrating between the first surface 21a and the second surface 21b is located.

[0077] [Configuration of the shielding portion of the second embodiment] The shielding portion 22 in this embodiment is a nonwoven fabric made of resin. The shielding portion 22 in this embodiment has breathability. The shielding portion 22 may be bonded to the second surface 21b of the mounting table 21. The shielding portion 22 may be rectangular when viewed from the gravity direction X. When viewed from the gravity direction X, the shielding portion 22 may overlap the entire second surface 21b of the mounting table 21. The shielding portion 22 covers the through hole 21h from the second surface 21b side of the mounting table 21. In this embodiment, the shielding portion 22 is provided on all of the mounting tables 21 except for the mounting table 21 located at the bottom in the gravity direction X among the multiple mounting tables 21.

[0078] [Configuration of the movement mechanism] The jig 20 of this embodiment includes a moving mechanism 50. The moving mechanism 50 may include a base 51, a shaft 52, and a cylinder 53. The base 51 is box-shaped and opens at the top. The base 51 surrounds the multiple mounting tables 21. The shaft 52 extends in the first direction Y. Both ends of the shaft 52 in the first direction Y are fixed to the base 51. Two shafts 52 are provided for each mounting table 21. The two shafts 52 penetrate each of the multiple mounting tables 21 outside the first recess 41 in the second direction Z. Each of the multiple mounting tables 21 can move back and forth in the first direction Y, which is a direction parallel to the first surface 21a, by moving along the shaft 52.

[0079] The cylinder 53 has a cylinder tube 54 and a piston rod 55 that can be inserted into and removed from the cylinder tube 54. The cylinder tube 54 may be located outside the base portion 51. The piston rod 55 may pass through the base portion 51. The piston rod 55 extends in a first direction Y.

[0080] The tip of the piston rod 55 is fixed to the mounting table 21. The fixed position of the tip of the piston rod 55 on the mounting table 21 may be the middle of the mounting table 21 in the second direction Z. One cylinder 53 is provided for each mounting table 21.

[0081] In the cylinder 53, when the amount by which the piston rod 55 protrudes from the cylinder tube 54 is increased, the mounting table 21 moves in the first direction Y. In the cylinder 53, when the amount by which the piston rod 55 protrudes from the cylinder tube 54 is decreased, the mounting table 21 moves in the direction opposite to the first direction Y.

[0082] The position of the mounting table 21 when the amount of protrusion of the piston rod 55 from the cylinder tube 54 is the smallest is referred to as the first position P1. The position of the mounting table 21 when the amount of protrusion of the piston rod 55 from the cylinder tube 54 is the largest is referred to as the second position P2. The first position P1 and the second position P2 are positions shifted from each other in the first direction Y. The movement mechanism 50 is capable of moving the multiple mounting tables 21 between the first position P1 and the second position P2.

[0083] [Details of 1st and 2nd positions] 8 or 9, the mounting table 21 at the first position P1 and the mounting table 21 at the second position P2 do not overlap in the direction of gravity X. Therefore, the mounting area 45 of the mounting table 21 at the first position P1 and the mounting area 45 of the mounting table 21 at the second position P2 do not overlap in the direction of gravity X.

[0084] 10, at the second position P2, the multiple mounting tables 21 are adjacent to each other in the direction of gravity X. Among the mounting tables 21 adjacent to each other in the direction of gravity X, the shielding portion 22 is located between the electrode material 15 placed on the first surface 21a of the mounting table 21 on the lower side in the direction of gravity X and the second surface 21b of the mounting table 21 on the upper side in the direction of gravity X.

[0085] [How to place the electrode material on the mounting table and how to move the mounting table] 7, in this embodiment, when drying the electrode material 15 using the jig 20, the electrode material 15 is placed on a plurality of mounting tables 21 and the plurality of mounting tables 21 are moved. Note that this embodiment illustrates a case in which the electrode material 15 is placed on the plurality of mounting tables 21 and the plurality of mounting tables 21 are moved while all of the mounting tables 21 are in the first position P1. This embodiment illustrates a case in which the plurality of mounting tables 21 place different electrode materials 15 on each other.

[0086] First, the electrode material 15 is placed on the uppermost mounting table 21 among the multiple mounting tables 21. The electrode material 15 is placed on the mounting table 21 by sucking the electrode material 15 from above using a robot hand or the like. When the electrode material 15 is placed on the uppermost mounting table 21 among the multiple mounting tables 21, the mounting table 21 is moved to the second position P2 by the cylinder 53.

[0087] 9, when the uppermost mounting table 21 among the multiple mounting tables 21 is moved to the second position P2, no other mounting table 21 is positioned above the mounting table 21 that is one position closer to the direction of gravity X than this mounting table 21 at the first position P1. Therefore, the electrode material 15 can be placed on the mounting table 21 from the upper part of the mounting table 21 by using the space above this mounting table 21. The mounting table 21 on which the electrode material 15 is placed is moved to the second position P2 by the cylinder 53. In this way, the placement of the electrode material 15 on the mounting table 21 and the movement of the mounting table 21 are repeated, so that the electrode material 15 is placed on all the mounting tables 21 and all the mounting tables 21 are positioned at the second position P2.

[0088] [Operation of the second embodiment] Next, the operation of this embodiment will be described together with a method for drying the electrode material 15 and a method for removing the electrode 10 from the jig 20 after the electrode material 15 has been dried.

[0089] In this embodiment, the electrode material 15 is dried in the same manner as in the first embodiment. The hot air blown onto the jig 20 inside the drying furnace blows onto the electrode material 15 placed on the mounting table 21 and also passes through the through holes 21h of the mounting table 21. Since the shielding portion 22 is a nonwoven fabric, air can flow into the through holes 21h and can be exhausted from the through holes 21h via the shielding portion 22.

[0090] When the drying of the electrode material 15 is completed, the jig 20 is removed from the drying furnace. Then, the electrodes 10 are removed from each of the multiple mounting tables 21. The electrodes 10 are removed from the mounting tables 21 by sucking the electrodes 10 from above using a robot hand or the like.

[0091] 11, a plurality of mounting tables 21 are moved sequentially to a first position P1 in the order in which the electrodes 10 are to be removed. Once the electrodes 10 have been removed from the mounting table 21 positioned at the first position P1, that mounting table 21 is moved to a second position P2. Thereafter, another mounting table 21 is moved from the second position P2 to the first position P1, and the electrodes 10 are then removed from that mounting table 21. In this manner, the mounting table 21 from which the electrodes 10 are to be removed is positioned at the first position P1. The other mounting tables 21 are positioned at the second position P2.

[0092] By moving one mounting table 21 to the first position P1 and positioning the other mounting tables 21 at the second position P2, the other mounting tables 21 are not positioned above the electrode 10 placed on the mounting table 21 positioned at the first position P1. Therefore, the electrode 10 can be removed from the mounting table 21 by utilizing the space above the mounting table 21 positioned at the first position P1.

[0093] [Effects of the second embodiment] According to the second embodiment, the following effects can be obtained. (2-1) The shielding portion 22 is a nonwoven fabric having breathability. Therefore, the cost of the shielding portion 22 can be reduced compared to when the shielding portion 22 is a metal plate. Even if the active material that has fallen from the electrode material 15 placed on the mounting table 21 adheres to the shielding portion 22 through the through-holes 21h, the shielding portion 22 can be replaced in a shorter cycle compared to when the shielding portion 22 is a metal plate.

[0094] (2-2) The jig 20 includes a moving mechanism 50 capable of moving the multiple mounting tables 21. The mounting area 45 of the mounting table 21 at the first position P1 and the mounting area 45 of the mounting table 21 at the second position P2 do not overlap in the gravity direction X. Therefore, by moving the multiple mounting tables 21 between the first position P1 and the second position P2 by the moving mechanism 50, the movement of the mounting tables 21 from the second position P2 to the first position P1 and the removal of the electrodes 10 from the mounting tables 21 can be performed in the order of the electrodes 10 to be removed. Therefore, the order in which the electrodes 10 are removed from the mounting tables 21 can be prevented from being restricted by the order in which the electrode materials 15 are placed on the mounting tables 21.

[0095] [Example of change] The above-described embodiments may be modified as follows: The above-described embodiments and the following modifications may be combined with each other to the extent that no technical contradiction occurs.

[0096] When a breathable nonwoven fabric is used as the shielding portion 22 , the shielding portion 22 may be located away from the second surface 21 b of the mounting table 21 . In the first embodiment, a breathable nonwoven fabric may be used for the shielding portion 22. In the second embodiment, a metal plate may be used for the shielding portion 22.

[0097] The configuration of the moving mechanism 50 is not limited to the configuration exemplified in the second embodiment. The moving mechanism 50 may have any configuration as long as it is capable of moving the plurality of mounting tables 21 between the first position P1 and the second position P2. In the second embodiment, a part of the mounting table 21 at the first position P1 and a part of the mounting table 21 at the second position P2 may overlap in the direction of gravity X. In short, it is only necessary that the mounting area 45 of the mounting table 21 at the first position P1 and the mounting area 45 of the mounting table 21 at the second position P2 do not overlap at least in the direction of gravity X.

[0098] The external shape of the mounting table 21 when viewed from the gravity direction X may be a shape other than a rectangle. In the first embodiment, the lower mounting table 31 may be provided with a through hole 21h.

[0099] A recess whose outer shape when viewed from the gravity direction is smaller than the third recess 43 may be provided in the mounting table 21. This recess can accommodate an electrode material 15 smaller than the third electrode material 15c. The third recess 43 may be omitted from the mounting table 21. Both the second recess 42 and the third recess 43 may be omitted from the mounting table 21. All of the first recess 41, the second recess 42, and the third recess 43 may be omitted from the mounting table 21.

[0100] The electrode material 15 may be placed on the first surface 21 a so that the positive electrode precursor layer 14 a of the electrode material 15 contacts the placement region 45 . The graphite coating applied to the mounting table 21 does not have to cover the entire surface of the mounting table 21. In short, it is sufficient that the mounting area 45 of each of the multiple mounting tables 21 is graphite coated.

[0101] The graphite coating may be omitted for some or all of the mounting tables 21. In the first embodiment, the support shaft 24 may be omitted from the jig 20. The shape of the support portion 23 may be changed from a cylindrical shape. In this case, the support portion 23 may be, for example, a columnar shape extending in the direction of gravity X. That is, it is sufficient that the adjacent mounting tables 21 are arranged apart from each other in the direction of gravity X.

[0102] In the first embodiment, the second support portion 23b may have a larger cross-sectional area in a cross section perpendicular to the direction of gravity X than the first support portion 23a. The first support portion 23a and the second support portion 23b may have the same cross-sectional area in a cross section perpendicular to the direction of gravity X. [Explanation of symbols]

[0103] P1...first position, P2...second position, X...direction of gravity, Y...first direction, 11...current collector, 15...electrode material, 20...jig, 21...mounting table, 21a...first surface, 21b...second surface, 21h...through hole, 21i...communicating hole, 22...shielding portion, 23...support portion, 23h...support hole, 24...support shaft, 31...lower mounting table, 32...upper mounting table, 41...first recess, 41a...first bottom surface, 41b...first side surface, 42...second recess, 42a...second bottom surface, 42b...second side surface, 45...mounting area, 50...moving mechanism.

Claims

1. A jig for manufacturing an electrode used for drying an electrode material having active material mixtures of different polarities applied to one surface and the other surface of a current collector, comprising: The jig is a plurality of mounting tables arranged apart from each other in a gravity direction, each of the mounting tables having a first surface on which the electrode material is placed and a second surface positioned opposite to the first surface in the gravity direction; a shielding portion located between the electrode material placed on the first surface of the mounting table at a lower position in the gravity direction and the second surface of the mounting table at an upper position in the gravity direction, among the mounting tables adjacent to each other in the gravity direction, When a region of the first surface on which the electrode material is placed is defined as a placement region, a through hole penetrating between the first surface and the second surface is located in the mounting area, The jig for manufacturing an electrode, wherein the shielding portion covers the through hole from the second surface side of the mounting table.

2. The jig for manufacturing an electrode according to claim 1 , wherein the shielding portion is a metal plate spaced apart from the second surface in the direction of gravity.

3. 2. The jig for manufacturing an electrode according to claim 1, wherein the shielding portion is made of a nonwoven fabric having air permeability.

4. the electrode material is placed on the mounting table so that the active material mixture containing carbon is in contact with the mounting region; 4. The jig for manufacturing an electrode according to claim 1, wherein the mounting area is coated with graphite.

5. The mounting table has a first recess and a second recess recessed in the gravity direction, The first recess includes a first bottom surface and a first side surface extending from a periphery of the first bottom surface, the second recess includes a second bottom surface and a second side surface extending from a periphery of the second bottom surface, and is recessed from the first bottom surface in the gravity direction; The jig for manufacturing an electrode according to any one of claims 1 to 4, wherein the mounting area is located on the first bottom surface and the second bottom surface.

6. the jig includes a plurality of support portions that support the plurality of mounting tables so that the mounting tables are spaced apart from each other in the gravity direction; Among the plurality of mounting tables, the mounting tables excluding the mounting table located at the bottom in the gravity direction are defined as upper mounting tables, the support portion is provided for each of the upper mounting tables and extends in the gravity direction between adjacent mounting tables in the gravity direction; The jig for manufacturing an electrode according to any one of claims 1 to 5, wherein the support portion located at the bottom in the direction of gravity among the plurality of support portions has a larger cross-sectional area perpendicular to the direction of gravity than the other support portions.

7. Among the plurality of mounting tables, the mounting table located at the bottom in the direction of gravity is defined as a lower mounting table, and the mounting tables other than the lower mounting table are defined as upper mounting tables. the jig includes a plurality of support parts that support the plurality of mounting tables so that the plurality of mounting tables are spaced apart from each other in the gravity direction, and a support shaft that is located on the lower mounting table and extends in the gravity direction, the support portion is provided for each of the upper mounting tables, and has a cylindrical shape extending in the gravity direction between the mounting tables adjacent to each other in the gravity direction; a communication hole communicating with the support hole of the support portion is located in the upper mounting table, The jig for manufacturing an electrode according to any one of claims 1 to 6, wherein the support shaft is inserted through the support hole and the communication hole.

8. the jig includes a moving mechanism capable of moving the plurality of mounting tables between a first position and a second position that are shifted from each other in a first direction that is one direction parallel to the first surface, An electrode manufacturing jig as described in any one of claims 1 to 5, wherein the mounting area of ​​the mounting table at the first position and the mounting area of ​​the mounting table at the second position do not overlap in the direction of gravity.

Images