Abstract: Coated electrode active material particles for lithium-ion batteries, that can suppress side reactions between the electrolytic solution and the coated electrode active materials, and that can prevent the internal resistance value of lithium-ion batteries from increasing, can be provided. The coated cathode active material particles for lithium-ion batteries in which at least a part of the surface of the cathode active material particles is coated with a coating layer, wherein the coating layer contains a polymer compound, a conductive assistant, and ceramic particles, and wherein the BET specific surface area of the ceramic particles is 70 to 300 m2/g.

Abstract: Provided is a battery pack in which close contact between resin current collectors of vertically adjacent unit cells can be maintained. A battery pack includes: two or more unit cells including a stacked unit consisting of a set of a positive electrode resin current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode resin current collector stacked sequentially, a stacked body of the above-described two or more unit cells being enclosed in an exterior body; and an integrated insulator covering across boundaries between the above-described unit cells on at least one of the side surfaces of the above-described stacked body.

Abstract: A battery pack having two or more cells provided with a lamination unit composed of a single set of a positive electrode resin current collector, a positive electrode active material layer, a separator, a negative electrode active material layer and a negative electrode resin current collector sequentially laminated together, the two or more cells being sealed in an exterior body, in which filler materials are provided in gaps between the cells and/or gaps between the cell and the exterior body.

Abstract: The present invention aims to provide a method for producing a pinhole-free thin resin current collector for negative electrodes. The method for producing a sheet-shaped resin current collector for negative electrodes of the present invention includes stacking three or more layers of melts of conductive resin compositions each containing a polyolefin and a conductive filler to obtain a multilayered body, wherein the polyolefin contained in each of the conductive resin compositions that form the respective layers of the multilayered body has a melt mass flow rate of 15 to 70 g/10 min as measured at a temperature of 230° C. and a load of 2.16 kg in accordance with JIS K7210-1:2014.

Abstract: A lithium-ion battery manufacturing device and a lithium-ion battery manufacturing method can suppress variation in thickness and shape distortion of a lithium-ion battery. The lithium-ion battery includes a cathode current collector, a cathode active material layer, a separator, an anode active material layer, and an anode current collector that are stacked. The lithium-ion battery has a circular frame member that fixes an outer edge of the separator, which is placed between the cathode current collector and the anode current collector, and that seals the cathode active material layer, the separator, and the anode active material layer. The lithium-ion battery manufacturing device includes: a holder that sandwiches the lithium-ion battery from both sides of the stacking direction; and a sealing device that has a frame-shaped heater, which heat-seals an outer edge of the lithium-ion battery by heating the frame member placed at the outer edge.

Abstract: This invention has an objective to increase the collected amounts of lithium contained in a lithium-ion battery. A recycling method for a lithium-ion battery comprising: a first discharging step, which increases an amount of lithium included in a cathode active material by discharging the lithium-ion battery via a load with a first resistance value; a second discharging step, which further increases the amount of lithium included in the cathode active material by discharging the lithium-ion battery via a load with a second resistance value lower than the first resistance value; and a collecting step, which collects the cathode active material from the lithium-ion battery after the second discharging step.

Abstract: Provided is a lithium-ion assembled battery in which two or more single cells are laminated and the DC resistance value between the single cells is low.

Abstract: A battery cell (1) has an electrode composition, a frame member (3) placed annularly so as to surround the electrode composition, and a positive electrode current collector and a negative electrode current collector for closing openings of the frame member (3) from both sides in the thickness direction. The frame member (3) has a fragile portion (9) for communicating inside and outside of the frame member (3) when the pressure inside the frame member increases above a certain level. The battery cell (1) in question allows increase in the pressure inside the frame member (3), thereby preventing damage.

Abstract: A cell system includes: a stacked-type cell module (100) having a plurality of lithium ion unit cells (1) being stacked and having through holes (3a, 3b) formed therein; a gas supply part (31); a cooling liquid supply part (32); a temperature sensor (35); and a control part (36) that controls switching between a normal control mode and a high-temperature control mode based on a signal from the temperature sensor (35). In the normal control mode, the control part (36) controls the gas supply part (31) to supply a gas to the through holes (3a, 3b), and at the same time, controls the cooling liquid supply part (32) to stop supply of a cooling liquid, and in the high-temperature control mode, the control part (36) controls the cooling liquid supply part (32) to supply the cooling liquid to the through holes (3a, 3b) to which the gas is supplied, and at the same time, controls the gas supply part (31) to stop supply of the gas.

Abstract: Provided is a lithium-ion assembled battery in which two or more single cells are laminated and the DC resistance value between the single cells is low.

Abstract: The present invention relates to a method of manufacturing a lithium ion battery having a set of a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector laminated in this order, and having a configuration in which outer peripheries of the positive electrode active material layer and the negative electrode active material layer are sealed with a sealing material and an electrolytic solution is enclosed, the method including: a step of manufacturing a positive electrode and/or a negative electrode by an electrode manufacturing step including a supply step of preparing a frame-shaped sealing material and a bottom member, and supplying an electrode active material composition containing electrode active material particles and an electrolytic solution to a space surrounded by the sealing material and the bottom member, and a compression step of compressing the electrode active material co

Abstract: A resin current collector provides means for improving the cycle characteristics in a lithium ion battery and includes a polyolefin resin, and a conductive carbon filler. The total surface area of the conductive carbon filler contained in 1 g of the resin current collector is 7.0 m2 or more and 10.5 m2 or less.

Abstract: There is provided a lithium ion battery having a current collector and an electrode composition layer formed on a surface of the current collector, where the electrode composition layer contains coated electrode active material particles, each of which is obtained by coating at least a part of a surface of an electrode active material particle with a coating layer containing a polymer compound, the current collector has a conductive base material and a conductive composition layer containing a polymer compound and a conductive filler, on a surface of the conductive base material, the surface being in contact with the electrode composition layer, and the polymer compound contained in the conductive composition layer and the polymer compound contained in the coating layer have the same composition.

Abstract: A current collector for a lithium ion battery includes a first conductive resin layer and a second conductive resin layer. The first conductive resin layer includes a first conductive filler. The second conductive resin layer is formed on the first conductive resin layer and includes a second conductive filler. The first conductive filler is a conductive carbon. The second conductive filler contains at least one kind of metal element selected from the group consisting of platinum, gold, silver, copper, nickel, and titanium. A volume % of the second conductive filler in the second conductive resin layer on a first surface side, which is a first conductive resin layer side, is higher than that on the second surface side that is opposite to the first conductive resin layer.

Abstract: A current collector for a lithium ion battery includes a first conductive resin layer and a second conductive resin layer. The first conductive resin layer includes a first conductive filler. The second conductive resin layer is formed on the first conductive resin layer and includes a second conductive filler. The first conductive filler is a conductive carbon. The second conductive filler contains at least one kind of metal element selected from the group consisting of platinum, gold, silver, copper, nickel, and titanium. A volume % of the second conductive filler in the second conductive resin layer on a first surface side, which is a first conductive resin layer side, is higher than that on the second surface side that is opposite to the first conductive resin layer.

Abstract: A resin current collector is a current collector for a positive electrode of a lithium ion battery. This resin current collector includes a polyolefin resin and a conductive carbon filler. With this resin current collector, a value obtained by dividing the yield point strength in the TD (Traverse Direction) by the yield point strength in the MD (Machine Direction) is at least 0.75 and at most 1.10, and the ten-point average roughness Rz in the TD is less than 4 ?m.

Abstract: The present invention aims to provide a method for producing a pinhole-free thin resin current collector for negative electrodes. The method for producing a sheet-shaped resin current collector for negative electrodes of the present invention includes stacking three or more layers of melts of conductive resin compositions each containing a polyolefin and a conductive filler to obtain a multilayered body, wherein the polyolefin contained in each of the conductive resin compositions that form the respective layers of the multilayered body has a melt mass flow rate of 15 to 70 g/10 min as measured at a temperature of 230° C. and a load of 2.16 kg in accordance with JIS K7210-1:2014.

Abstract: A cell system includes: a stacked-type cell module (100) having a plurality of lithium ion unit cells (1) being stacked and having through holes (3a, 3b) formed therein; a gas supply part (31); a cooling liquid supply part (32); a temperature sensor (35); and a control part (36) that controls switching between a normal control mode and a high-temperature control mode based on a signal from the temperature sensor (35). In the normal control mode, the control part (36) controls the gas supply part (31) to supply a gas to the through holes (3a, 3b), and at the same time, controls the cooling liquid supply part (32) to stop supply of a cooling liquid, and in the high-temperature control mode, the control part (36) controls the cooling liquid supply part (32) to supply the cooling liquid to the through holes (3a, 3b) to which the gas is supplied, and at the same time, controls the gas supply part (31) to stop supply of the gas.

Abstract: A resin current collector exhibits liquid bleeding prevention properties and low resistance, suppresses the generation of an oxidation current, and exhibits moldability that enables film thinning. The resin current collector contains a polyolefin resin and two kinds of conductive carbon fillers, a first conductive carbon filler and a second conductive carbon filler, in which the first conductive carbon filler is graphite or carbon black, the second conductive carbon filler is a carbon nanotube or a carbon nanofiber having a specific surface area of 35 to 300 m2/g, a total surface area of the first conductive carbon filler contained in 1 g of the resin current collector is 0.5 to 9.0 m2, and a mass proportion of the first conductive carbon filler is 30% by mass or less with respect to a mass of the resin current collector.

Abstract: A method for producing a non-aqueous electrolyte secondary battery in which the internal resistance of the battery is decreased, and which has a high capacity and high cycle durability, is provided. A method for producing a non-aqueous electrolyte secondary battery that comprises a current collector and an electrode active material layer disposed on a surface of the current collector, the electrode active material layer comprising a non-bound body including an electrode active material, the method comprising a step of applying an electrode active material slurry including an electrode active material, a lithium salt, and a non-aqueous solvent on the surface of the current collector and thereby forming a coating film, wherein a water content of the electrode active material slurry is less than 500 ppm by mass.