Abstract: An electrode mixture including an electrode active material, a conductive fibrous carbon material, and inorganic nanoparticles applied to a surface of the electrode active material. The conductive fibrous carbon material contains magnetic metal. A ratio of coverage of the inorganic nanoparticles covering the surface of the electrode active material to content of the magnetic metal contained in the conductive fibrous carbon material is 38.5 or less.

Abstract: A battery module includes: a plurality of battery cells stacked in a Y axis direction; a cover body that covers the plurality of battery cells in a Z axis direction; and a duct. The duct has: a cylindrical portion to which a hose can be fitted, the cylindrical portion extending, in the Y axis direction in a form of in a cylinder, from one end portion of a duct main body portion in the Y axis direction so as to have a tip with an opening; and a projection with which an end portion of the hose can be brought into abutment, the projection protruding from an outer peripheral surface of the cylindrical portion at a position away from the opening of the cylindrical portion in the Y axis direction. The cover body has an anchoring portion anchored to the projection in the Z axis direction.

Abstract: A battery module includes: a duct; and an attachment-target member to which the duct is attached. The attachment-target member has a first wall portion and the duct has a second wall portion. The first wall portion is provided with a claw portion. The second wall portion is provided with a groove portion. The groove portion includes a first segment portion and a second segment portion, the first segment portion extending in the Y axis direction, the claw portion being disposed in the first segment portion, the first segment portion anchoring the claw portion in the Z axis direction, the second segment portion extending in a direction intersecting the Y axis direction, the second segment portion being connected to the first segment portion, the second segment portion allowing the claw portion to enter the first segment portion when attaching the duct to the attachment-target member.

Abstract: An electrode body includes a stack of a negative electrode plate, a positive electrode plate, and a separator in which the separator is arranged between the negative electrode plate and the positive electrode plate. The positive electrode plate has a positive electrode density of 3.0 g/cm3 or less. The negative electrode plate has a negative electrode density of 1.3 g/cm3 or less. A ratio of a specific surface area of the positive electrode plate to a specific surface area of the negative electrode plate is 0.7 or greater.

Abstract: A battery module includes: a stack including a plurality of battery cells arranged side by side in a first direction. A reference plane for positioning the stack in a direction orthogonal to the first direction is provided. The cover member includes a biasing portion that biases the stack in a direction away from the cover member. The biasing portion biases the stack to press the stack against the reference plane.

Abstract: A plurality of battery cells are arranged side by side in a first direction and each have a prismatic shape. A case accommodates the plurality of battery cells, and supports the plurality of battery cells in at least a first direction, and forms a unit including the plurality of battery cells. The case includes a first end portion and a second end portion arranged side by side and facing each other in a second direction orthogonal to the first direction. The first end portion is provided with a biasing portion that is deformed, when one battery cell of the plurality of battery cells is inserted into the case, to bias the battery cell toward the second end portion of the case. The second end portion is provided with a reference surface to position the battery cell in the second direction.

Abstract: A battery module includes: a duct extending in a Y axis direction in which a plurality of battery cells are stacked, to form a flow space; and an attachment-target member to which the duct is attached. The attachment-target member has a first wall portion and a pair of second wall portions each rising from the first wall portion in a Z axis direction. The duct is disposed between the pair of second wall portions. The duct has: a third wall portion facing the first wall portion in the Z axis direction with the flow space being interposed therebetween; and a pair of fourth wall portions extending, in the Z axis direction toward the first wall portion, from both end portions of the third wall portion in the X axis direction, the pair of fourth wall portions respectively facing the pair of second wall portions in the X axis direction.

Abstract: A battery module includes: a stack including a plurality of battery cells arranged side by side in a first direction; and a cover member having an insulating property, the cover member being provided to cover the stack from a side opposite to the electrode terminal. The cover member includes a first drainage portion located at a center portion of the cover member in a second direction orthogonal to the first direction, and a second drainage portion located at each of both end portions of the cover member in the second direction.

Abstract: A first imaginary arc is defined with a first imaginary point as a center, the first imaginary arc including three points that are a center and both ends of a third portion in a second direction orthogonal to a first direction, the first imaginary point being located on a fourth portion side with respect to a first imaginary straight line that connects the both ends of the third portion in the first direction. A second imaginary arc is defined as a center, the second imaginary arc including three points that are a center and both ends of the fourth portion in the second direction, the second imaginary point being located on the third portion side with respect to a second imaginary straight line that connects the both ends of the fourth portion in the first direction.

Abstract: A partition wall member includes a main body portion and a plurality of protrusions. The plurality of protrusions protrude from the main body portion toward at least one battery cell of the plurality of battery cells. Each of the plurality of protrusions has a first end portion, a second end portion, and an intermediate portion. The first end portion and the second end portion face each other in a second direction orthogonal to the first direction. The intermediate portion is located between the first end portion and the second end portion. A cooling medium path along the second direction is formed between the plurality of protrusions. When viewed in the second direction, a cross sectional area of the cooling medium path is decreased from the first end portion toward the intermediate portion and is increased from the intermediate portion toward the second end portion.

Abstract: A plate-shaped member includes a flat surface portion, a flange portion, and a transition portion, the flange portion being provided at an end portion of the plate-shaped member, the flange portion protruding from the flat surface portion in the first direction, the transition portion continuously transitioning from the flat surface portion to the flange portion. The flat surface portion, the transition portion, and the flange portion are provided to be arranged side by side in the second direction.

Abstract: A battery module includes: a plurality of battery cells arranged side by side in a first direction, each of the plurality of battery cells having a prismatic shape; and two restraint members that restrains the plurality of battery cells along the first direction, each of the two restraint members being provided to be arranged side by side with the plurality of battery cells in a second direction orthogonal to the first direction. Each of the two restraint members includes a plate-shaped portion extending in a plane direction including the first direction and a third direction orthogonal to the first direction and the second direction. The plate-shaped portion is constituted of a metal member having a rolling line along the third direction, and the plate-shaped portion is provided with an opening.

Abstract: An end plate includes a plate-shaped member. The plate-shaped member has an uneven shape including an abutment portion and a recess, the abutment portion being in abutment with the stack in a first direction, the recess being located in a direction away from the stack with respect to the abutment portion. The recess includes a first portion and a second portion, the first portion having a flat surface shape, the first portion constituting a bottom surface of the recess, the second portion having been through a process for forming the uneven shape. A pressing process has been performed onto the plate-shaped member at a region overlapping with the second portion when viewed in the first direction so as to form a flat surface continuous to the first portion.

Abstract: A battery module includes: a plurality of battery cells arranged side by side in a first direction, each of the plurality of battery cells having a prismatic shape; two restraint members that each restrain the plurality of battery cells along the first direction, each of the two restraint members being provided to be arranged side by side with the plurality of battery cells in a second direction orthogonal to the first direction; and a coupling member in a form of a strip, the coupling member extending in the second direction at an intermediate portion in the first direction to couple the two restraint members to each other. The coupling member has a first engagement portion and a second engagement portion that are respectively engaged with the two restraint members in directions of sandwiching the two restraint members along the second direction.

Abstract: Regarding a herein disclosed battery 100, plural positive electrode tabs 22t are provided on a positive electrode 22. On a cross section view being cut in a direction orthogonal to a wound axis WL of a wound electrode assembly 20, the positive electrode 22 includes a first area A1 positioned at one side more than a wound axis WL of a wound electrode assembly 20 with respect to a thickness direction X reaching from the one flat surface 20f1 through the wound axis WL to the other flat surface 20f2 and includes a second area A2 positioned at the other side more than the wound axis WL with respect to the thickness direction X. In the first area A1, the positive electrode tabs 22t are provided on layers of eighty percent or more of the positive electrode 22. In the second area A2, among the layers counted until 5th layer from the wound axis WL side, there are plural layers on which the positive electrode tabs 22t are formed.

Abstract: The present disclosure provides a positive electrode active material having a spinel-type crystal structure that can reduce an increase in resistance and a decrease in capacity retention rate due to repeated charging and discharging of a non-aqueous electrolyte secondary battery. The positive electrode active material disclosed herein is configured of a lithium manganese composite oxide having a spinel-type crystal structure, wherein the lithium manganese composite oxide includes secondary particles in which a plurality of primary particles are aggregated, an average particle diameter of the secondary particles based on a SEM image is 10 ?m or more and 20 ?m or less, an average particle diameter of the primary particles based on a SEM image is 4 ?m or more and 8 ?m or less, and nickel atoms are provided in the surface layer portion of the secondary particles.

Abstract: An ultrasonic joining horn disclosed herein can generate ultrasonic vibration in a predetermined vibration direction and includes a base portion, a stand portion that rises from an upper surface of the base portion, and a pressure contact portion formed of a plurality of protrusions that protrude from an upper surface of the stand portion. Each of the protrusions is formed into a pyramid shape or a truncated pyramid shape, the protrusions are arrayed, and when viewed from top, at least a portion of a peripheral edge of a portion in which the protrusions are arrayed has a zigzag shape. The zigzag portion is formed along at least one of the vibration direction and a perpendicular direction to the vibration direction. The upper surface of the base portion has an exposed surface on which the stand portion is not formed.

Abstract: Regarding a herein disclosed battery 100, a wound electrode assembly 20 includes a first bent area 20r1 arranged at one end part side, and a second bent area 20r2 arranged at the other end part side. In a case where, regarding a cross section view of the wound electrode assembly 20 cut in a direction orthogonal to a wound axis WL, a straight line extending in a direction perpendicular to a thickness direction reaching from one flat surface 20f1 to the other flat surface 20f2 through the wound axis WL is treated as a straight line A, the first bent area 20r1 includes a first area 20r1a positioned at one side more than the straight line A in the wound electrode assembly 20, a winding-end end part 22e of the positive electrode and a winding-end end part 24e of the negative electrode are positioned on the first area 20r1a, and a winding-end end part 70Ae of the first separator positioned on the outermost surface of the wound electrode assembly 20 is positioned on the second bent area 20r2.

Abstract: A method for manufacturing an electrode disclosed herein includes a step of granulating a moisture powder formed by aggregated particles including at least an electrode active material, carbon nanotubes, and a non-aqueous electrolytic solution, and a step of forming an electrode by supplying an electrode active material layer composed of the moisture powder onto the electrode current collector. The granulation step includes a first mixing treatment of mixing the carbon nanotubes and the non-aqueous electrolytic solution to impregnate the carbon nanotubes with the non-aqueous electrolytic solution, a second mixing treatment of mixing the carbon nanotubes impregnated with the non-aqueous electrolytic solution and the electrode active material, and a treatment of compressing the mixture obtained by the first and second mixing treatments.

Abstract: A method for manufacturing a negative electrode plate of a rechargeable battery is provided. The method includes kneading a negative electrode active material and a negative electrode additive to form a negative electrode mixture paste; applying the negative electrode mixture paste to a negative electrode current collector; and drying the negative electrode mixture paste. The blackness of a material prepared by kneading the negative electrode active material and the negative electrode additive is set in a range of 4 to 16. The viscosity of a negative electrode thickener contained in the negative electrode additive is set in a range of 13000 mPa·s to 21000 mPa·s when a shear rate is 0.01 s?1.