A packaging material for a battery includes a base material layer as an outer layer, a sealant layer as an inner layer, and a barrier layer provided between the base material layer and the sealant layer. The sealant layer is composed of a single layer or a multi-layer. The sealant layer includes a first sealant layer serving as an innermost layer made of a propylene-based resin containing an ethylene-propylene copolymer. In the ethylene-propylene copolymer, a ratio Mw/Mn of a weight average molecular weight Mw to a number average molecular weight Mn, measured by a gel permeation chromatography (GPC), is 1 to 7, a melt flow rate measured at 230° C. at a load of 2.16 kg based on JIS K7210 is 5 g/10 min to 30 g/10 min, and a melting point calculated by a differential scanning calorimetry analysis is 120° C. to 135° C.

A packaging material for a battery includes a base material layer as an outer layer, a sealant layer as an inner layer, and a barrier layer provided between the base material layer and the sealant layer. The sealant layer is composed of a single layer or a multi-layer. The sealant layer includes a first sealant layer serving as an innermost layer made of a propylene-based resin containing an ethylene-propylene copolymer. In the ethylene-propylene copolymer, a ratio Mw/Mn of a weight average molecular weight Mw to a number average molecular weight Mn, measured by a gel permeation chromatography (GPC), is 1 to 7, a melt flow rate measured at 230° C. at a load of 2.16 kg based on JIS K7210 is 5 g/10 min to 30 g/10 min, and a melting point calculated by a differential scanning calorimetry analysis is 120° C. to 135° C.

The present invention provides a fiber-reinforced aerogel material which can be used as insulation in thermal battery applications. The fiber-reinforced aerogel material is highly durable, flexible, and has a thermal performance that exceeds the insulation materials currently used in thermal battery applications. The fiber-reinforced aerogel insulation material can be as thin as 1 mm less, and can have a thickness variation as low as 2% or less. Also provided is a method for improving the performance of a thermal battery by incorporating a reinforced aerogel material into the thermal battery. Further provided is a casting method for producing thin fiber-reinforced aerogel materials.

The present invention is directed to liquid monomer mixtures that comprise at least one metal salt, at least one ionic liquid, at least one monomer, and at least one polymer initiator. The present invention is also directed to methods of making gel polymer electrolytes from the liquid monomer mixtures and methods of using the gel polymer electrolytes in batteries and other electrochemical technologies.

A vehicle body member includes a first cell unit including a first negative electrode part and a first positive electrode part, a second cell unit including a second negative electrode part and a second positive electrode part, a reinforcing insulating layer interposed between a first surface of the first cell unit and a second surface of the second cell unit, a first positive electrode current collector connected to the first positive electrode part, a second positive electrode current collector connected to the second positive electrode part and connected in parallel to the first positive electrode current collector, a first negative electrode current collector connected to the first negative electrode part, and a second negative electrode current collector connected to the second negative electrode part and connected in parallel to the first negative electrode current collector.

A battery pack includes a cell assembly. The cell assembly includes a cell assembly positive terminal, a cell assembly negative terminal, a positive lead-out piece, a negative lead-out piece, a discharge path, and a protective element. The positive lead-out piece connects the cell assembly positive terminal to a battery pack positive terminal. The negative lead-out piece connects the cell assembly negative terminal to a battery pack negative terminal. The protective element is disposed on the discharge path. When the discharge current of the discharge path is greater than or equal to a preset current, the protective element turns off. The length of one of the positive lead-out piece or the negative lead-out piece close to the protective element is greater than the length of the other one of the positive lead-out piece or the negative lead-out piece away from the protective element.

A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

A lithium-ion battery stack that is a layered body includes: a plurality of lithium-ion batteries layered directly or with other layers therebetween; and one or more self-extinguishing layers.

A battery cell includes an exterior can, an electrode body accommodated in the exterior can, a heat insulator disposed on at least a part of the outer surface of the side wall of the exterior can, and an insulative film covering the heat insulator and an entire of the outer surface of the side wall of the exterior can.

A battery includes an electrode body having a positive electrode and a negative electrode, in which the positive electrode and the negative electrode are wound; and an exterior material that accommodates the electrode body, in which at least one of the positive electrode and the negative electrode is divided into two or more electrodes adjacent in a winding direction, the two or more of electrodes each have a current collecting lead, and the current collecting leads are electrically connected to each other at a position outside the exterior material.