Abstract: Provided is a battery pack capable of advantageously maintaining conduction. In the embodiment of the battery pack disclosed herein includes a stacked body in which a plurality of unit cells are stacked in a predetermined stacking direction, and a housing that accommodates the stacked body. An insulating member having an insulating property is arranged inside the housing. Here, a positive-negative electrode joint in which at least a part of the positive electrode terminal of one unit cell and at least a part of the negative electrode terminal of the other unit cell are joined to each other is present between the unit cells adjacent in the stacking direction, and the positive-negative electrode joints are embedded with the insulating member in order to prevent a liquid from penetrating from the outside.

Abstract: Provided is a battery pack in which battery performance can be suitably maintained. In the embodiment of the battery pack disclosed herein includes a stacked body in which a plurality of unit cells is stacked along a predetermined stacking direction, and a housing accommodating the stacked body. A heat radiating member having an insulating property and thermal conductivity is arranged on an inner wall of the housing in contact with the inner wall of the housing. Here, a positive-negative electrode terminal joint in which a positive electrode terminal of one unit cell and a negative electrode terminal of the other unit cell are joined to each other is present between the unit cells adjacent in the stacking direction, and the positive-negative electrode terminal joints are in contact with the heat radiating member.

Abstract: A positive active material composite particle of the present disclosure includes a positive active material particle, a conductive particle existing on a surface of the positive active material particle and having a smaller diameter than the positive active material particle, and a binder resin bonding the surface of the positive active material particle and the conductive particle on the surface of the positive active material particle. A positive electrode sheet of the present disclosure includes a positive active material mixture layer formed on a current collecting member by a dry process using the positive active material composite particle.

Abstract: According to the present disclosure, there is provided a technique making it possible to prevent an electrode active material layer and a protective layer from falling off or peeling off at the laser cutting site of an electrode plate and to obtain a highly safe secondary battery. A manufacturing method disclosed herein includes a step of preparing a positive electrode precursor having a positive electrode active material layer and a protective layer applied to a surface of a positive electrode core, and a step of cutting a protective layer application region of the positive electrode precursor by a continuous wave laser. As a result, it is possible to prevent the protective layer from falling off or peeling off due to the impact during laser irradiation.

Abstract: The present disclosure provides an electrode terminal with high conductivity and high junction strength. The electrode terminal disclosed herein includes a metallic first member and a metallic plate-shaped second member, wherein the first member has a connecting portion to be connected to the second member, and the connecting portion of the first member is bonded to one surface of the second member by a conductive adhesive.

Abstract: According to the present disclosure, a technique capable of suppressing an internal short circuit caused by a peeled metal piece and obtaining a safer secondary battery is provided. An electrode plate (negative electrode plate) disclosed herein includes a negative electrode core including copper or a copper alloy, a negative electrode active material layer applied to a surface of the negative electrode core, and a negative electrode tab protruding to the outside from one end side in a width direction. In the negative electrode plate, a first region having an oxide film having a thickness of 40 nm to 200 nm is formed in a region of 0.01 mm to 0.2 mm from an outer end side of the negative electrode tab toward the inside in the width direction, and the first region 22t1 extends along the outer end side 22ta of the negative electrode tab 22t.

Abstract: A novel method for producing an olefinic resin porous material is provided. The method for producing an olefinic resin porous material disclosed herein includes the steps of preparing a single phase in which an olefinic resin and a solvent are mixed each other, in a pressure-resistant container, introducing high pressure carbon dioxide into the pressure-resistant container, and releasing the pressure in the pressure-resistant container. In this method, introducing the high pressure carbon dioxide is carried out such that the pressure in the pressure-resistant container reaches 6 MPa or higher.

Abstract: A novel method for producing an olefinic resin porous material with no skin layer is provided. The method for producing an olefinic resin porous material disclosed herein includes the steps of preparing a single phase in which an olefinic resin, a hydrocarbon compound, and a polar compound are mixed one another, in a pressure-resistant container, introducing high pressure carbon dioxide into the pressure-resistant container, and releasing the pressure in the pressure-resistant container. The polar compound has a hydroxy group or a carbonyl group. Introducing the high pressure carbon dioxide is carried out such that the pressure in the pressure-resistant container reaches 6 MPa or higher.

Abstract: According to the present disclosure, the thermal deterioration of metal junction parts formed on a contact interface of constitution members of electrode terminals is suppressed. The electrode terminal of the secondary battery disclosed herein includes a first member having a plate-shaped connection part and a plate-shaped second member connected to the connection part of the first member in a surface-contact manner. Then, the technique disclosed herein includes a metal junction part and a heat-insulating part formed on a contact interface between a connection part of the first member and the second member, and the heat-insulating part is formed outward of the metal junction part in a radial direction centered on the metal junction part. Due to this constitution, the heat-insulating part can block great heat even when such a great heat is applied to a region outside the heat-insulating part, and therefore, the heat deterioration of the metal junction part can be suppressed.

Abstract: Provided by the present disclosure is an electrode material (mixture) which exhibits good spreadability and in which the surface area of an electrode active material layer at the stage of a coating film prior to drying can be easily increased by press molding. A moisture powder for forming an electrode active material layer on an electrode current collector of a positive electrode or negative electrode disclosed here is constituted from aggregated particles that contain a plurality of electrode active material particles, a binder resin and a solvent, wherein at least 50% by number or more of the aggregated particles that constitute the moisture powder have the following properties: (1) a solid phase, a liquid phase and a gas phase form a pendular state or a funicular state; and (2) a layer of the solvent is not observed at the outer surface of an aggregated particle in electron microscope observations.

Abstract: A terminal component includes a first metal and a second metal overlapped on the first metal. At a boundary between the first metal and the second metal, there is a joint portion in which the first metal and the second metal are joined by metal joining. The second metal has a groove on the outside of the joint portion on the surface opposite to the surface overlapped on the first metal.

Abstract: A terminal component includes a first metal and a second metal overlapped on the first metal. At least three biting portions in which an edge of one of the first metal and the second metal bites into the other metal is provided at an interface where the first metal and the second metal are overlapped.

Abstract: A terminal component includes a first metal and a second metal overlapped on the first metal, the first metal having a part to be connected to an internal terminal, and the second metal having a part to be exposed to the outside of a battery case. At an interface where the first metal and the second metal are overlapped, one of the first metal and the second metal has a protrusion having a flat top portion. The other metal is joined to the top portion. A cross section of the protrusion orthogonal to a projection direction of the protrusion is set such that fusing occurs when a current equal to or higher than a predetermined current value flows between the first metal and the second metal.

Abstract: A flexible printed circuit board is placed on a bottom surface portion and has an electric circuit electrically connected to a plurality of power storage cells. A connection terminal is provided on the flexible printed circuit board and is electrically connected to an electrode terminal. The flexible printed circuit board has a main body portion, and a connection piece portion that extends from the main body portion and is curved so as to be connected to the connection terminal. The connection piece portion includes a first straight portion extending straightly in a stacking direction of the power storage cells, and a second straight portion extending in parallel with the first straight portion with a gap being interposed between second straight portion and the first straight portion. The second straight portion is longer than the first straight portion.

Abstract: To shorten a charge time to a battery. A battery control device includes: a discharge controller which controls a discharge from the battery; and a charge controller which controls a charge to the battery. The discharge controller is configured to be capable of performing at least a discharge from the battery to a lower limit SOC determined in advance which is higher than a pre-charge SOC determined in advance. The charge controller is configured to charge the battery at a second charge rate that is lower than a first charge rate determined in advance when a present SOC of the battery is lower than the pre-charge SOC and to charge the battery at the first charge rate when the present SOC of the battery is equal to or higher than the pre-charge SOC.

Abstract: A battery control device includes: a discharge controller which controls discharge from the battery; a charge controller which controls charge to the battery; and a storage which stores a target charge capacity to be charged to the battery. The discharge controller is configured to be capable of performing at least discharge from the battery to a lower limit SOC determined in advance. The charge controller is configured to start a count of the charge capacity at a timing at which a present SOC of the battery becomes equal to the lower limit SOC when charge is started in a state where the present SOC of the battery is lower than the lower limit SOC, and to end the charge to the battery once the charge capacity having been charged after starting the count becomes equal to the target charge capacity stored in the storage.

Abstract: In a stack, a plurality of power storage cells are stacked. A resin plate is placed on the stack. A flexible printed circuit board is placed on the resin plate and has an electric circuit electrically connected to the plurality of power storage cells. A thermistor element is provided on the electric circuit and is in contact with one power storage cell of the plurality of power storage cells to detect a temperature of the power storage cell. A cover member is provided on the resin plate to cover the flexible printed circuit board. An elastic body is located between the cover member and the thermistor element to press the thermistor element toward the power storage cell. The cover member includes a protuberance that protrudes toward the resin plate side. The elastic body is disposed on the protuberance.

Abstract: A plate member is provided with a gas exhaust port, an opening, and a wall portion. The opening is formed in a bottom surface portion at a position facing an electrode terminal. The wall portion protrudes from the bottom surface portion at positions on outer sides with respect to the gas exhaust port in a width direction of the plate member, and discontinuously extends in a stacking direction of power storage cells. A flexible printed circuit board has a main body portion, and a connection piece portion that extends from the main body portion and is curved so as to be connected to a connection terminal. A first gap is formed between the main body portion and the connection piece portion. A first auxiliary wall portion is provided in the first gap, the first auxiliary wall portion protruding from the bottom surface portion and extending in the stacking direction.

Abstract: A battery disclosed herein includes: electrode bodies: an outer package which has an opening and which houses the electrode bodies, a sealing plate which seals the opening of the outer package and which has a through-hole and a recessed portion provided around the through-hole on a surface of a side opposing the electrode bodies; and a sealing member which seals the through-hole of the sealing plate. The sealing member has an inserted portion having been inserted to the through-hole and an enlarged diameter portion which extends from the inserted portion to inside of the outer package and which is formed with a larger diameter than the inserted portion. At least a part of the enlarged diameter portion is arranged inside the recessed portion of the sealing plate.

Abstract: A laminated battery disclosed herein includes an electrode body, a laminated exterior body, and positive and negative electrode terminals. At least one of the positive and negative electrode terminals is configured of a plate-shaped clad material in which a first metal and a second metal, which are different from each other, are joined to each other, and a tab film composed of a resin material is arranged on the surfaces of the first metal and the second metal of the clad material. The boundary region of the first metal and the second metal of the clad material is not exposed to the outside of the exterior body, and the tab film is arranged at a peripheral edge portion close to the boundary region, excluding the boundary region, on the wide surface of the clad material, and the tab film is welded to the exterior body.