The purpose of the present invention is to provide a separator which is for a power storage device, and which has high strength and can be thinned. The separator for a power storage device has a microporous membrane containing polyolefin as a main component, wherein the melt tension of the microporous membrane as measured at a temperature of 230° C. is 30 mN or less, and the melt flow rate (MFR) of the microporous membrane as measured under a load of 2.16 kg and at a temperature of 230° C. is 0.9 g/10 min or less.

A thermally insulating multilayer sheet includes a compressible layer, and a thermal insulation layer, a flame retardant layer, or a combination thereof disposed on the compressible layer.

A peel off assembly for exposing a safety feature comprising an aversive agent for a battery includes a first adhesive layer adhered to a base layer. Optionally, a layer comprising a colorant is disposed over and coupled to the first adhesive layer. A layer comprising a water-soluble material and an aversive agent is disposed over and coupled to the first adhesive layer. A second adhesive layer is disposed over and coupled to the layer comprising a water-soluble material. A kill strip layer is disposed between the second adhesive layer and the base layer. Optionally, a label is disposed over and coupled to the second adhesive layer. The second adhesive layer is adapted and arranged to release from the layer comprising the water-soluble material, when a peel force is applied such that the second adhesive layer and the kill strip layer are removable from the layer comprising a water-soluble material when the peel force is applied to the second adhesive layer.

An outer package material for all-solid-state batteries, which is composed of a multilayer body that is sequentially provided, from the outer side, with at least a base material layer, a barrier layer and a thermally fusible resin layer in this order, and which is configured such that the multilayer body has a layer that has a buffering function on the outer side of the thermally fusible resin layer.

The present disclosure relates to a multilayer construction comprising a polymeric foam layer; and at least one spacer layer comprising a plurality of spacer elements, wherein each spacer element comprises a protruding portion and two opposite terminal portions, and wherein at least one terminal portion of each spacer element is fully embedded into the polymeric foam layer.

A thermal runaway barrier for at least significantly slowing down a thermal runaway event within a battery assembly. The thermal runaway barrier includes a layer of a nonwoven fibrous thermal insulation comprising a fiber matrix of inorganic fibers, thermally insulative inorganic particles of irreversibly or permanently expanded expandable inorganic material dispersed within the fiber matrix, and a binder dispersed within the fiber matrix so as to hold together the fiber matrix. An optional organic encapsulation layer may also be used to encapsulate the nonwoven fibrous thermal insulation.

A laminating device includes: a plurality of laminating heads that each holds a unit laminated body; a drum section in which the plurality of laminating heads are arranged, which holds each laminating head swingably via a support shaft, and which rotates to advance each laminating head to a laminating position facing a lamination stage; a cam section which is in contact with each laminating head and which causes each laminating head to swing around the support shaft in association with a movement of each laminating head caused by a rotation of the drum section; and a biasing member that biases each laminating head in a radial direction of the drum section.

The invention relates to thermal management systems for devices that generate heat, including electronic devices such as portable electronics, for example, cell phones, electronic components, and/or battery systems. A multilayer phase change material composite structure may include multiple layers having different properties. For example, a PCM material composite layer may include a supporting structure having pores and a phase change material. Further, a layer of fire retardant material may be used in the multilayer phase change material. In some embodiments, additional layers such as coatings, thermal interface materials, and/or high thermal conductivity material may be present. A matrix formed from a porous supporting structure and a phase change material may be used to control and/or dissipate heat in a thermal management system. Support elements may provide stability. The thermal management system may mitigate conditions that could lead to a thermal runaway event and/or may influence conditions within the system during a potential thermal runaway event to reduce risk of fire. The thermal management system may include water, flame- and/or fire-retardant materials to control temperatures of an energy storage device and/or system. A housing may be used to surround a portion of a heat generating device such as an energy storage device or system, for example, an individual battery or a group of batteries, respectively. The housing or enclosure may include interior structures that surround and in some cases electrically isolate batteries from a thermal sink that includes a porous flame- and/or fire-retardant material having water in the pores.

A method for manufacturing an electrode disclosed herein includes: steps of forming a coating film composed of an electrode material by passing the electrode material through a gap between a rotating first roll and a rotating second roll; adhering the coating film to the second roll and conveying the coating film; and transferring the conveyed coating film onto an electrode current collector conveyed by a conveying device to form an electrode mixture layer composed of the coating film. The speed ratio between a peripheral speed of the second roll and a conveying speed of the electrode current collector is changed by changing the peripheral speed of the second roll on the basis of the thickness of the coating film or the width of the gap. The timing of the change in the speed ratio is allowed to be based on the Equation (1) described in the description.

Novel or improved microporous battery separator membranes, separators, cells, batteries including such membranes, separators, or cells, and/or methods of making such membranes and/or separators, and/or methods of using such membranes and/or separators. In accordance with at least certain embodiments, an improved or novel battery separator for a secondary or rechargeable lithium battery may have low Electrical resistance of less than 0.95 ohm-cm.sup.2, or in some cases, less than 0.8 ohm-cm.sup.2. Furthermore, the inventive battery separator membrane may provide a means to achieve an improved level of battery performance in a rechargeable or secondary lithium battery based on a possibly synergistic combination of low Electrical resistance, low Gurley, low tortuosity, and/or a unique trapezoid shaped pore. In accordance with at least certain multilayer embodiments (by way of example only, a trilayer membrane made of two polypropylene layers with a polyethylene layer in between), the inventive microporous membrane or battery separator may have excellent onset and rate of thermal shutdown performance.