The present disclosure relates to a multilayer composite that may include a first porous layer, and a first barrier layer overlying the first porous layer. The first barrier layer may include a polyaramid material, a polyimide material, or any combination thereof. The multilayer composite may have a flame resistance rating of at least about 180° C. and a 50% strain compression rating of not greater than about 600 kPa.

The present disclosure relates to an outer case for a flexible rechargeable battery, including a first resin layer configured to include a first patterned area, a moisture barrier layer disposed on the first resin layer to include a second patterned area, a second resin layer disposed on the moisture barrier layer to include a third patterned area, and a stress relaxation layer configured to cover the third patterned area.

A multi-layered battery separator for a lithium secondary battery includes a first layer of a dry processed membrane bonded to a second layer of a wet processed membrane. The first layer may be made of a polypropylene based resin. The second layer may be made of a polyethylene based resin. The separator may have more than two layers. The separator may have a ratio of TD/MD tensile strength in the range of about 1.5-3.0. The separator may have a thickness of about 35.0 microns or less. The separator may have a puncture strength of greater than about 630 gf. The separator may have a dielectric breakdown of at least about 2000V.

An object of the present invention is to provide an adhesive composition having an excellent adhesive force even in the presence of hot water in an assembly in which at least one of two or more members to be bonded to each other via the adhesive composition is a low-polarity metal member, and an adhesion method. The present invention relates to an adhesive composition and an adhesion method for bonding a metal member. The adhesive composition contains a polyolefin (A) component having an acidic group and/or an acid anhydride group and having an acid value of 0.01 mgKOH/g to 6.5 mgKOH/g. The metal member has a ratio of a dipole term in surface free energy of 0.01% to 5.0%.

The present application relates to a laminating machine, including a first heating device, a first sheet material device, a second sheet material device, and a first combining device, the first combining device includes a heating mechanism and a rolling mechanism. A first sheet material, a first material strip, and a second sheet material are heated and pressed by the heating mechanism and the rolling mechanism, compared with a combination method of a PET film and an oven, it is not necessary to set arrange the PET film, cost of the PET film, arranging a PET film unwinding mechanism, and arranging a PET film winding mechanism is reduced, and occupied space is reduced, manufacturing cost is reduced, and there is no need to set up a longer oven, which improves combination efficiency and production efficiency, and further saves space and reduces device cost.

The present application relates to a laminating machine, including a heating device, a first sheet material device, a second sheet material device, and a first combining device. By using the laminating machine, adhesives on opposite sides of a first combining material strip are heated and melted by the heating device; then, the first sheet material device and the second sheet material device attach a first sheet material and a second sheet material to the opposite sides of the first combining material strip respectively; next, a second combining material strip is formed by the first combining device. Due to the adhesives being melted, bonding strength of the first sheet material and the second sheet material to the first combining material strip can be guaranteed, avoiding a displacement after the first sheet material and the second sheet material are attached to the first combining material strip.

A laminated body pressing apparatus, which can restrain damage of a first outer ridge portion or a second outer ridge portion of a positive electrode plate during roller-pressing and can restrain damage of a strip-shaped first separator of a strip-shaped negative electrode body on a positive electrode plate side, includes a first press roller, a second press roller disposed parallel to the first press roller and spaced apart from the first press roller by a roller gap, and a metal plate feeding unit to feed a strip-shaped metal plate extending in a conveyance direction to the roller gap. The apparatus roller-presses the positive electrode plate and the strip-shaped negative electrode body by the first press roller and the second press roller in a state where the strip-shaped metal plate fed by the metal plate feeding unit is placed on the positive electrode plate placed on the strip-shaped negative electrode body.

A housing, in particular a battery housing, includes a wall, wherein the wall is formed, at least is some areas, from a multi-layered material. The wall encompasses an arrangement area which is formed by bending the material.

A multilayer sheet disposed at least between a plurality of heat sources and capable of conducting heat from the heat sources includes: a rubber sheet made of a rubber-like elastic body; heat insulating sheets laminated on both surfaces of the rubber sheet and capable of reducing heat conduction between the plurality of adjacent heat sources; and first heat conductive sheets laminated outside the heat insulating sheets in a separated manner and having more excellent heat conductivity than the rubber sheet and the heat insulating sheets, in which the heat insulating sheets have a bag shape wrapping the rubber sheet, and a cell unit including the multilayer sheet.

Disclosed herein is an asymmetric porous membrane having two outer layers and at least one inner layers. The outer layers may be asymmetric in thickness, pore size, porosity, tortuosity, or combinations thereof. In some embodiments, the asymmetric porous membrane has two outer layers and no inner layers. The thickness of one of the outer layers to the other of the outer layers is from 1.1 to 25:1, preferably from 1.1:1 to 10:1, 1.1:1 to 5:1 or 4:1 to 10:1. In some embodiments, both outer layers are PP-containing layers and in some embodiments, one outermost layer may be a PE-containing layer and the other may be a PP-containing layer. The asymmetric porous membrane may be used as or to make a battery separator. In some embodiments, the battery separator may include an asymmetric porous membrane having the thinner of the two outer layers or the layer facing the anode coated with a coating such as a ceramic coating. The battery separator may be used in a liquid electrolyte secondary battery. In the battery, the thicker of the outer layers and/or the PP-containing layer faces or is closest to the cathode and the thinner of the two outer layers and/or the PE-containing layer faces or is closest to the anode. The outer layer facing the anode may be coated with a coating such as a ceramic coating. The battery separators described herein may have electrochemical stability voltage equal to or above 4.2 v.s. Li/Li.sup.+.