A separator, a lithium-ion cell including the separator, and an electric apparatus including the lithium-ion cell. The separator includes a separator substrate and a coating layer disposed on the separator substrate, and the separator is adhered to an adjacent first electrode plate or second electrode plate through the coating layer. The coating layer is configured to decrease a peel force between the separator and an external component when a temperature is higher than a preset threshold or to be capable of chemically reacting with an acidic substance. When the temperature is higher than a threshold, the peel force between the separator and an adjacent electrode plate is decreased. To be specific, such lithium-ion cell can improve a current situation that the peel force between the separator and the electrode plate remains relatively great when the temperature of the cell is higher than a threshold.

In at least select embodiments, the instant disclosure is directed to new or improved battery separators, components, materials, additives, surfactants, lead acid batteries, systems, vehicles, and/or related methods of production and/or use. In at least certain embodiments, the instant disclosure is directed to surfactants or other additives for use with a battery separator for use in a lead acid battery, to battery separators with a surfactant or other additive, and/or to batteries including such separators. In at least certain select embodiments, the instant disclosure relates to new or improved lead acid battery separators and/or systems including improved water loss technology and/or methods of manufacture and/or use thereof. In at least select embodiments, the instant disclosure is directed toward a new or improved lead acid battery separator or system with one or more surfactants and/or additives, and/or methods for constructing lead acid battery separators and batteries with such surfactants and/or additives for improving and/or reducing water loss from the battery.

A power storage device includes a positive electrode and a negative electrode facing each other, a separator disposed between the positive electrode and the negative electrode, the separator being porous, and a sealing member made of a resin and sealing a space between the positive electrode and the negative electrode. The separator includes a material having a melting temperature higher than a melting temperature of a resin material of the sealing member. The separator has an edge portion sandwiched and held in the sealing member in a state where the edge portion is joined to a melted-then-solidified portion of the resin material of the sealing member.

A power storage device includes a positive electrode and a negative electrode facing each other, a separator disposed between the positive electrode and the negative electrode, the separator being porous, and a sealing member made of a resin and sealing a space between the positive electrode and the negative electrode. The separator includes a material having a melting temperature higher than a melting temperature of a resin material of the sealing member. The separator has an edge portion sandwiched and held in the sealing member in a state where the edge portion is joined to a melted-then-solidified portion of the resin material of the sealing member.

The present application relates to an electrochemical device. The electrochemical device includes: at least one electrode, the at least one electrode having a first surface; and a fiber coating layer, the fiber coating layer including a fiber and being disposed on the first surface. The electrochemical device has the advantages of high energy density, strong liquid retention ability, good drop resistance, good chemical stability and the like since its fiber coating layer has small thickness, high porosity and stronger interfacial adhesion to the electrode.

The present invention relates to a battery cell for evaluating an internal short circuit, and a method for evaluating using the battery cell, wherein an internal short circuit state of a battery cell can be easily induced and, at the same time, an effective internal short circuit evaluation is possible, and the battery cell comprising: first and second electrodes which comprise a coated region on which an electrode mixture layer is coated on a metal current collector and a non-coated region on which an electrode mixture layer is not coated, and which comprise first and second electrode tabs which protrude in one direction from the coated region and do not have an electrode mixture layer coated thereon.

The present invention relates to a battery cell for evaluating an internal short circuit, and a method for evaluating using the battery cell, wherein an internal short circuit state of a battery cell can be easily induced and, at the same time, an effective internal short circuit evaluation is possible, and the battery cell comprising: first and second electrodes which comprise a coated region on which an electrode mixture layer is coated on a metal current collector and a non-coated region on which an electrode mixture layer is not coated, and which comprise first and second electrode tabs which protrude in one direction from the coated region and do not have an electrode mixture layer coated thereon.

A separator for a lithium-containing electrochemical cell is provided herein. The separator includes a porous substrate having a first side and an opposing second side and a coating layer disposed adjacent to at least the first side of the porous substrate. The coating layer includes three-dimensionally (3D) ordered porous ceramic particles. An electrochemical cell including such a separator is also provided herein. The electrochemical cell may or may not include a negative electrode.

A battery separator and a preparation method therefor are provided. The separator includes a lithium ion battery separator substrate and an inorganic coating, the lithium ion battery separator substrate consists of a support layer and a dense layer, and the inorganic coating is coated on the dense layer; the separator has excellent high-temperature resistance, and still has good strength retention and the heat shrinkage rate thereof is no more than 2% after treatment at 300° C. for 1 h, and thus ensures the stability and isolation of the rigid structure of the separator coating at high temperatures; the substrate has a uniform and compact double-layer structure, effectively controls phenomena such as pinholes and filler particles fall-off in a subsequent coating process, and meets the requirements of lithium ion battery separators with respect to heat resistance, porosity and strength, thus having excellent comprehensive performance.

It is an object of the present invention to provide a substrate for lithium ion battery separators which has high adhesion to an inorganic particle layer, can be made thin and is excellent in tensile strength and cuttability and a lithium ion battery separator including the substrate for lithium ion battery separators. The substrate for lithium ion battery separators which contains heat-resistant fibers and synthetic resin short fibers contains fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml as the heat-resistant fibers and has a content of the fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml of not less than 1.0 mass % to less than 5.0 mass % based on the total of all the fiber components contained in the substrate. The modified freeness is a value measured in accordance with JIS P8121-2:2012 except that an 80-mesh wire net having a wire diameter of 0.14 mm and an opening of 0.18 mm is used as a screening plate and the concentration of a sample is 0.1%.