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 power storage cell comprises a cell case and a wound electrode assembly. The wound electrode assembly includes a first electrode, a separator, a second electrode, and a fixing member. In a winding direction of the wound electrode assembly, the first electrode has a first end portion. The second electrode has a second end portion. The separator has a third end portion. In the winding direction, the second end portion is positioned within a region spanning from the first end portion to the third end portion. The first end portion consists of the first foil. The second end portion consists of the second foil. The fixing member fixes the wound electrode assembly at the third end portion. The expression “0.9×T2?Tf?1.1×(T1+T2)” is satisfied. T1 represents a thickness of the first foil. T2 represents a thickness of the second foil. Tf represents a maximum thickness of the fixing member.

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: A lithium metal secondary battery comprises a power generation element and an electrolyte. The power generation element includes a positive electrode and a negative electrode. The negative electrode includes a base material and raised portions. The base material is electrically conductive. The raised portions are electrically insulating. Depressed portions are formed on a surface of the base material. The raised portions are provided on a surface of the base material. The raised portions protrude outwardly from the surface of the base material. A relationship of the expression “0.001?d/h?10” is satisfied. d represents a depth of the depressed portions. h represents a height of the raised portions.

Abstract: A power storage cell includes an electrode assembly constructed as a wound body in which a positive electrode sheet and a negative electrode sheet are wound with a separator interposed therebetween. The separator includes a separator layer, and an adhesion layer provided on at least one of an inner surface and an outer surface of the separator layer in a radial direction of the electrode assembly. A termination end portion of the electrode assembly is affixed via the adhesion layer to a portion included in the electrode assembly and positioned inside the termination end portion in the radial direction.

Abstract: An energy storage cell includes an electrode assembly, a cell case housing the electrode assembly, and an electrolyte solution contained in the cell case. The electrode assembly includes a wound assembly obtained by winding a positive electrode sheet and a negative electrode sheet with a separator therebetween, a first tape attached to one end in an axial direction of the wound assembly, and a second tape attached to the other end in the axial direction of the wound assembly. A force of fixing the wound assembly by the first tape is smaller than a force of fixing the wound assembly by the second tape.

Abstract: A power storage cell includes: an electrode assembly that includes a positive electrode sheet, a negative electrode sheet, and a separator, and is constructed as a wound body in which the positive electrode sheet and the negative electrode sheet are wound with the separator interposed therebetween; and a cell case that houses the electrode assembly. The cell case includes a cylindrical portion that surrounds an outer circumferential surface of the electrode assembly. The electrode assembly includes a pair of end regions including an end portion of the electrode assembly in an axial direction of the electrode assembly, and an intermediate region lying between the pair of end regions in the axial direction. A diameter of the intermediate region is larger than a diameter of the end region.

Abstract: The power storage cell includes a cell case, a wound electrode body, a fixing member, and an electrolytic solution. The cell case houses a wound electrode body, a fixing member, and an electrolytic solution. The wound electrode body is formed by winding an electrode and a separator. The fixing member fixes a winding end of the wound electrode body in the winding direction. The fixing member includes an adhesive component. The adhesive component is soluble in the electrolytic solution.

Abstract: A power storage cell includes an electrode assembly constructed as a wound body in which a positive electrode sheet and a negative electrode sheet are wound with a separator interposed therebetween, a current collector plate, a cell case, and an electrolyte solution. Each of the positive electrode sheet and the negative electrode sheet includes a current collector foil, and an active material layer. The current collector foil includes a main region where the active material layer is provided, and an end region where the active material layer is not provided. A plurality of tabs in the end region are arranged so that a cover region and an exposure region are formed, the cover region covering part of a layer end portion, the exposure region causing the remainder of the layer end portion to be exposed. The current collector plate is connected to the cover region.

Abstract: The wound electrode assembly of the power storage cell includes a strip electrode. The strip electrode includes a current collector and a composite material layer. The composite material layer includes active material particles and is disposed on the surface of the current collector. In the width direction in plan view, the strip electrode includes a first region, a second region and a third region. The first region is disposed at an end portion in the width direction. In the first region, the current collector is exposed, and the current collector is electrically connected to the electrode terminal. The second region and the third region are covered by the composite material layer. In the width direction, the second region is disposed between the first region and the third region. Reaction resistance per unit area of the second region is larger than that of the third region.

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: 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 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 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: 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 charged positively or negatively, an inversion plate that is able to short-circuit the lid main body and the external terminal, and a protrusion protruding from the inversion plate toward the external terminal. The inversion plate is deformable between a steady-state shape and an inversion shape, the steady-state shape being a shape curved to project in a direction away from the external terminal, the inversion shape being a shape curved to project toward the external terminal with the inversion plate being in contact with the external terminal. The external terminal has a holding portion that holds the protrusion when the inversion plate is in the inversion shape.

Abstract: A power storage cell includes: an electrode assembly constituted of a wound body in which a plurality of positive electrode tabs and a plurality of negative electrode tabs are wound to protrude upward; a cell case; and an insulating member. The cell case has a case main body and a lid. The insulating member has a covering portion that covers an upper surface of the electrode assembly, and the covering portion has a holding portion that holds an electrolyte solution leaked from the electrode assembly.

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 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.