Abstract: A power storage cell comprises an electrode assembly, a cell case, and an external terminal. The cell case has a case body and a lid. The lid has a lid body electrically charged with the same polarity as that of a positive electrode or a negative electrode, an invertible plate capable of short-circuiting between the lid body and the external terminal, and a prevention part connected to the invertible plate. The invertible plate is deformable between a normal shape and an inverted shape. The lid body has a receiving portion that receives the prevention part when the invertible plate is in the inverted shape. The receiving portion allows the prevention part to pass therethrough when the invertible plate is deforming from the normal shape to the inverted shape, and is in contact with the prevention part when the invertible plate is in the inverted shape.

Abstract: A power storage cell includes an electrode assembly, a cell case, and an external terminal. The cell case has a case main body and a lid. The lid has a lid main body, and an inversion plate that is able to short-circuit the lid main body and the external terminal. The inversion plate has: a base portion; an inversion portion connected to inside of the base portion, the inversion portion being able to come into contact with the external terminal; and a low-elastic member made of a conductive material having an elastic modulus smaller than an elastic modulus of the inversion portion, the low-elastic member being provided on a surface of the inversion portion facing the external terminal. The low-elastic member is elastically deformed with the low-elastic member being sandwiched between the inversion portion and the external terminal when the inversion portion is inverted.

Abstract: A power storage cell includes: an electrode assembly; and a cell case that accommodates the electrode assembly. The cell case has a case main body provided with an opening that opens upward, a lid connected to the case main body, and an elastic member disposed between the case main body and the electrode assembly. The elastic member has a center-facing portion facing a central portion of the electrode assembly, and the center-facing portion has a shape curved to protrude in a direction away from the electrode assembly.

Abstract: A power storage cell includes an electrode assembly, a cell case, and an external terminal. The cell case has a case main body and a lid. The lid has a lid main body connected to an opening of the case main body and charged positively or negatively in the electrode assembly, and a short-circuit member connected to the lid main body, the short-circuit member being able to short-circuit the lid main body and the external terminal. The external terminal includes a terminal plate. The short-circuit member includes an elastic portion made of a conductive resin. The elastic portion is separated from the terminal plate when an internal pressure of the cell case is less than a predetermined pressure, and is elastically deformed to come into contact with the terminal plate when the internal pressure of the cell case is equal to or more than the predetermined pressure.

Abstract: A power storage cell comprises an electrode assembly including a plurality of tabs, a cell case, an external terminal, a connecting member, and an insulating member. The connecting member has a current collector plate connected to the plurality of tabs, and a connecting pin connecting the current collector plate and the external terminal. The insulating member includes an insulator that has a shape surrounding the connecting pin and that insulates the connecting pin from the cell case. The connecting pin has a covered portion covered with the insulator, and the covered portion has a fuse portion.

Abstract: A method of manufacturing a power storage cell includes: preparing a case main body, a lid main body, and an inversion plate; welding the inversion plate to the lid main body; and connecting the lid main body to an opening of the case main body. The lid main body prepared in the preparing includes a pressure release valve. In the welding, the welding of the inversion plate to the lid main body is started from an opposite portion of the inversion plate that is located opposite to a side of the inversion plate facing the pressure release valve, and after welding a periphery of the inversion plate, the welding of the inversion plate to the lid main body is ended at the opposite portion.

Abstract: A wet particle storage tank includes a tank body capable of storing wet particles containing particles and solvent. The tank body has an upper storage section having a supply port through which the wet particles are supplied, a lower storage section located below the upper storage section and having a discharge port through which the wet particles are discharged, and a bridge forming section provided between the upper storage section and the lower storage section. The bridge forming section facilitates formation of a bridge by the wet particles to block falling of the wet particles from the upper storage section to the lower storage section.

Abstract: A manufacturing method of an electrode sheet comprising: a preparation step of preparing a wet granulated body containing an electrode material and a solvent, a film forming step of passing the wet granulated body through a gap between a first roll and a second roll having a solvent absorbing portion on an outer peripheral surface to form an electrode material layer on an outer peripheral surface of the second roll, and a transfer step of transferring the electrode material layer onto a substrate.

Abstract: An electrode sheet manufacturing method includes preparing a wet powder that contains an active material and a volatile liquid, and of which a BET specific surface area is 50 cm2/g or more, performing film formation of an active material sheet by spreading the wet powder, and manufacturing an electrode sheet by disposing the active material sheet on a surface of a backing material.

Abstract: An electrode material containing active material powder is prepared. Dry classification of the electrode material is performed by a classifier. An electrode is manufactured by using the electrode material subjected to the dry classification. The classifier includes a mesh screen, a blade, and a motor. Breakage of the mesh screen is detected by monitoring either or both of an operation sound of the classifier and torque of the motor. The electrode material contained in the classifier will no longer be used for manufacturing of the electrode when breakage of the mesh screen is detected.

Abstract: An electrode manufacturing method includes (a) preparing a first electrode including a first current collector and a first active material layer, (b) separating the first current collector and the first active material layer, (c) processing the first active material layer into wet particles, (d) shaping the wet particles into a second active material layer and (e) disposing the second active material layer on a surface of a second current collector, thereby manufacturing a second electrode. The first active material layer includes an active material and a binder. The second active material layer includes the active material and the binder.

Abstract: A method of manufacturing an electrode includes a step of preparing a granulated material containing an electrode active material, a binder, and a solvent, a step of compressing the granulated material between a pair of rolls, to form an electrode composite layer, and a step of placing the electrode composite layer on an electrode current collector. At least one of the pair of rolls has a temperature of 40° C. or higher.

Abstract: A method of manufacturing a granulated material containing an electrode active material, a binder, and a solvent is provided. The electrode active material has at least one type of functional group selected from hydroxy group, carbonyl group, and carboxyl group on its surface.

Abstract: A wet particle storage tank includes a tank body capable of storing wet particles containing particles and solvent. The tank body has an upper storage section having a supply port through which the wet particles are supplied, a lower storage section located below the upper storage section and having a discharge port through which the wet particles are discharged, and a bridge forming section provided between the upper storage section and the lower storage section. The bridge forming section facilitates formation of a bridge by the wet particles to block falling of the wet particles from the upper storage section to the lower storage section.

Abstract: At the time of forming a paste layer on a substrate sheet by use of three rolls placed at right angles, in order to offset a variation amount of a first gap due to thermal expansion of the rolls, a variation amount in a given detection period is calculated by use of outputs of a first sensor configured to detect a coating film surface of a second-roll coating film of a second roll and a second sensor configured to detect a second-roll surface, and the first roll is moved by use of a first-roll moving mechanism.

Abstract: A manufacturing method of a particle aggregate aggregated with wet particles in which active material particles and conductive particles are evenly dispersed and a manufacturing method of an electrode body including the particle aggregate are provided. The manufacturing method of a particle aggregate includes a first step of obtaining a first mixture by mixing conductive particles with a binder dispersion in which binder is dispersed in a dispersion medium, a second step of obtaining a clay-like mixture by kneading the first mixture with active material particles, and a third step of obtaining the particle aggregate aggregated with wet particles formed of the clay-like mixture.

Abstract: There are provided a method for manufacturing a wet granular body of an electrode active material mixture from which granular bodies with almost uniform grain size can be obtained, the wet granular body itself, a method for manufacturing an electrode plate using the same, and a manufacturing apparatus for the same. There are provided mixing of obtaining a wet powder body in a pendular state in which solid-matter powder includes at least electrode active material powder and conductive material powder, liquid components exist in facing portions of solid powder but the liquid components are not linked one another in the facing portions, and spaces among the solid powder are entirely linked, and granulating of obtaining an assembly of the wet granular body of the electrode active material mixture by forming the wet powder obtained in the mixing process into grains.

Abstract: A manufacturing method and a testing method for a positive active material mixture to manufacture the positive active material mixture as a mixture of a positive active material, a conductive material, and a disperse medium by mixing positive active material particles, conductive material particles, and the disperse medium, pressing to form a pressed surface by pressing a resultant product of the mixing by a pressure member, disperse-degree obtaining to obtain the disperse degree of the positive active material particles and the conductive material particles on the pressed surface, and determining to determine success and failure in the disperse degree obtained in the disperse-degree obtaining, the resultant product is taken as the positive active material mixture when a determination result of the determining is success, and the resultant product is taken back to the mixing when the determination result of the determining is failure.

Abstract: A manufacturing method of a particle aggregate aggregated with wet particles in which active material particles and conductive particles are evenly dispersed and a manufacturing method of an electrode body including the particle aggregate are provided. The manufacturing method of a particle aggregate includes a first step of obtaining a first mixture by mixing conductive particles with a binder dispersion in which binder is dispersed in a dispersion medium, a second step of obtaining a clay-like mixture by kneading the first mixture with active material particles, and a third step of obtaining the particle aggregate aggregated with wet particles formed of the clay-like mixture.

Abstract: At the time of forming a paste layer on a substrate sheet by use of three rolls placed at right angles, in order to offset a variation amount of a first gap due to thermal expansion of the rolls, a variation amount in a given detection period is calculated by use of outputs of a first sensor configured to detect a coating film surface of a second-roll coating film of a second roll and a second sensor configured to detect a second-roll surface, and the first roll is moved by use of a first-roll moving mechanism.