A laminated polyolefin microporous membrane is disclosed. The laminated polyolefin microporous membrane includes a first polyolefin microporous membrane, and a second polyolefin microporous membrane. A shutdown temperature of the laminated polyolefin microporous membrane is from 128° C. to 135° C., an air permeation resistance increase rate from 30° C. to 105° C. per 20 μm of thickness of the laminated polyolefin microporous membrane is less than 1.5 sec/100 cc Air/° C., and a variation range in an F25 value of the laminated polyolefin microporous membrane in a longitudinal direction is not greater than 1 MPa. The F25 value represents a value determined by dividing the load at 25% elongation of a sample of the laminated polyolefin microporous membrane as measured with a tensile tester by the cross-sectional area of the sample polyolefin microporous membrane.

Provided herein are intermediate frame systems and methods, comprising one or more arrays of channels on upper and/or lower edges of the intermediate frame wherein the channels are configured to provide a spatially uniform flow of electrolyte through the plane of the intermediate frame.

Separators for use in batteries are disclosed. In various embodiments, the separators include one or more of raised shoulders, ribs in three or more sizes, thickened mini-ribs on shoulders, and ribs within the shoulder. The disclosed separators are more resistant to failure due to punctures or tears than conventional separators.

A battery is provided. The battery includes a positive electrode; a negative electrode; and a separator; wherein the separator comprises a base which is formed from a non-woven fabric, and a surface layer which is formed on at least one of the surfaces of the base and includes a resin material and inorganic particles, and the separator is formed by a pressurizing process being carried out on at least one of the surfaces of the surface layer, a thickness of the base is 12 μm or more and 30 μm or less, an average particle diameter of primary particles of the inorganic particles is 0.3 μm or more and 0.8 μm or less, a thickness of the surface layer is 1 μm or more and 10 μm or less.

The following disclosure relates to a microporous polyolefin composite film having excellent heat resistance and thermal stability, and a method for manufacturing the same. More particularly, the present invention relates to a microporous polyolefin composite film capable of improving stability and reliability of a battery by heat sealing an edge of a microporous film provided with a coating layer that includes a polymer binder and inorganic particles, and a method for manufacturing the same.

An object of the present invention is to provide a laminated porous film excellent in handling ability. A laminated porous film having a layer containing a polymer other than a polyolefin laminated on at least one surface of a polyolefin porous film, wherein the uplift quantity of a side perpendicular to the machine direction, when allowed to stand still for 1 hour under an environment of a temperature of 23° C. and a humidity of 50%, is 15 mm or less.

In accordance with one embodiment, a solid-state battery system includes a first anode, a first cathode, a first solid-state electrolyte layer positioned between the first anode and the first cathode, a housing enclosing the first anode, the first cathode, and the first solid-state electrolyte layer, and at least one thermal control wire positioned within the housing and configured to modify a temperature within the housing.

Multi-layer lithium-ion cell units for lithium batteries are made using multiple stages of atmospheric plasma spray depositing devices. A suitable substrate layer is conveyed past the respective plasma spray devices to form, in a predetermined sequence, a current collector layer, a particulate electrode material layer, a porous separator layer for a liquid lithium-ion conducting electrolyte, a layer of particulate material for an opposing electrode, and a current collector film for the electrode material. The plasma deposition process allows flexibility and economy in making layered lithium-ion cell units. For example, the multistage process may be conducted in a continuous processing, multi-stage plasma deposition line in which one or more multi-layer cell units may be formed in the line.

The present invention relates to a method for cutting a separation membrane for a battery, in which the separation membrane is cut by laser radiation on the separation membrane, wherein the pulse repetition rate of the laser is 10 to 500 kHz; a separation membrane manufactured by the method; and a battery comprising the separation membrane. The present invention, in contrast with physical cutting, has the advantage of being capable of cutting a separation membrane for a battery so as to have a uniform cut surface, which was impossible by conventional physical cutting methods.

Provided is a porous separator for a secondary battery including an inorganic oxide layer formed on a porous substrate by an atomic layer deposition process, such that a thin separator having excellent heat stability, permeability and electrolyte impregnability may be provided by controlling specific conditions in the process and thicknesses of the inorganic oxide layers on a surface and inside of the porous separator.