Abstract: A partition member which has a thickness direction and a planar direction orthogonal to the thickness direction and which constitutes a partition between single batteries in the thickness direction or between a single battery and a member other than the single battery, wherein the partition member includes a thermal insulation material, and an auxiliary member which is disposed so as to be adjacent to the thermal insulation material in the planar direction and regulates a degree of contraction of the thermal insulation material in the thickness direction. A ratio of a density of the auxiliary member relative to a density of the thermal insulation material is 0.50 to 6.0.

Abstract: A partition member which has a thickness direction and a planar direction orthogonal to the thickness direction and which constitutes a partition between single batteries in the thickness direction or between a single battery and a member other than the single battery, wherein the partition member includes a thermal insulation material, and an auxiliary member which is disposed so as to be adjacent to the thermal insulation material in the planar direction and regulates a degree of contraction of the thermal insulation material in the thickness direction. A ratio of a density of the auxiliary member relative to a density of the thermal insulation material is 0.50 to 6.0.

Abstract: A partition member includes an encapsulated body capable of retaining a liquid, and an outer package body for accommodating the encapsulated body and the liquid. The area S1 of the encapsulated body when the outer package body and the encapsulated body are seen in a planar view from the thickness direction and the area S2 of a gap between the outer package body and the encapsulated body satisfy the relationship represented by formula 1 below, and the volume V1 of the liquid and the volume V2 of the encapsulated body satisfy the relationship represented by formula 2 below. S1/(S1+S2)?0.99 and??Formula 1 0.02?V1/V2?1.

Abstract: An object of the present invention is to provide a non-aqueous electrolytic solution secondary battery capable of improving low-temperature output characteristics. The problem is solved by a secondary battery including a non-aqueous electrolytic solution containing fluorosulfonic acid ions, difluorophosphate ions, and bisoxalate borate ions, in which [FSO3?]>[PO2F2?]>[BOB?] is satisfied in the non-aqueous electrolytic solution.

Abstract: Provided are: a non-aqueous electrolyte solution that can improve the charged storage characteristics of a non-aqueous electrolyte battery under a high-temperature environment while containing FSO3Li; and a non-aqueous electrolyte battery having excellent charged storage characteristics under a high-temperature environment. The non-aqueous electrolyte solution contains FSO3Li and a specific amount of ions of a specific metal element.

Abstract: A partition member has a thickness direction and a surface direction orthogonal to the thickness direction and partitions between unit batteries constituting an assembled battery in the thickness direction. The partition member comprises an exterior body including at least sealant resin layers and base material layers, and a liquid accommodated in the exterior body. The exterior body has a sealing portion in which the sealant resin layers are overlapped and joined in a region including an outer edge thereof. A width W (mm) of the sealing portion, a circumferential length L (mm) of the sealing portion, an average interval D (mm) between the two base material layers facing each other in the sealing portion, and a weight A (g) of the liquid satisfy Equation 1 below. (L×D)/(W×A)?10.

Abstract: A partition member which has a thickness direction and a planar direction orthogonal to the thickness direction and which constitutes a partition between single batteries in the thickness direction or between a single battery and a member other than the single battery, wherein the partition member includes a thermal insulation material, and an auxiliary member which is disposed so as to be adjacent to the thermal insulation material in the planar direction and regulates a degree of contraction of the thermal insulation material in the thickness direction. A ratio of a density of the auxiliary member relative to a density of the thermal insulation material is 0.50 to 6.0.

Abstract: A partition member that forms a partition between single batteries or between a single battery and a member other than the single battery. The partition member contains a thermal insulation material that contains a powdered inorganic material and a fibrous inorganic material and that has a density of 0.23 to 1.10 g/cm3.

Abstract: A partition member includes an encapsulated body capable of retaining a liquid, and an outer package body for accommodating the encapsulated body and the liquid. The area S1 of the encapsulated body when the outer package body and the encapsulated body are seen in a planar view from the thickness direction and the area S2 of a gap between the outer package body and the encapsulated body satisfy the relationship represented by formula 1 below, and the volume V1 of the liquid and the volume V2 of the encapsulated body satisfy the relationship represented by formula 2 below. S1/(S1+S2)?0.99 and??Formula 1: 0.02?V1/V2?1.

Abstract: A partition member includes an encapsulated body capable of retaining a liquid and an outer package body having an internal space for accommodating the liquid and the encapsulated body in a sealed state. The ratio of a water absorption rate 2 to a water absorption rate 1, [water absorption rate 2]/[water absorption rate 1], is at least 0.4. The water absorption rate 1 indicates the water absorption rate when the encapsulated body is compressed for 1 minute at a pressure of 0.05 kgf/cm2, and the water absorption rate 2 indicates the water absorption rate when the encapsulated body is compressed for 1 minute at a pressure of 5 kgf/cm2.