A pouch type secondary battery according to an embodiment of the present disclosure is a pouch type secondary battery in which a cell assembly, including an electrode assembly in which a positive electrode and a negative electrode are stacked with a separator interposed therebetween, at least one electrode tab protruding from the electrode assembly, and an electrode lead connected to the electrode tab, is housed in a pouch case, wherein the secondary battery comprises a lead film positioned between the pouch case and the electrode lead, and wherein the lead film comprises a first sealing part in a region far from the electrode assembly and a second sealing part in a region close to the electrode assembly, and a thickness of the second sealing part is larger than a thickness of the first sealing part.

A high-voltage energy module includes an insulating shell, a plurality of bare cells connected in series inside the insulating shell, one positive terminal and one negative terminal. The minimum number of bare cells is two. Each bare cell is formed by a positive film, a negative film and a separating film sandwiched between the positive film and the negative film. The positive film, the negative film and the separating film form a one-piece structure by conductive resin glue. Each two bare cells are connected by an insulating layer of flame-retardant composite insulating materials. The positive film is electrically connected to a positive conductive lug. The negative film is electrically connected to a negative conductive lug. There is only one electrical connection in the positive film, and there is only one electrical connection in the negative film.

Disclosed herein is a battery case configured to receive an electrode assembly and an electrolytic solution therein, the electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, the battery case including a layer structure and a gas adsorption layer formed on the inner surface of the layer structure, the gas adsorption layer including a gas adsorption material layer configured to adsorb a reaction gas that may be generated within the battery case during abnormal functioning of the electrode assembly, and a blocking layer formed on an exposed surface of the gas adsorption material layer, the blocking layer configured to prevent the gas adsorption material layer from being exposed to an ambient gas during assembly of the battery case.

To solve the above problem, a pouch forming apparatus according to an embodiment of the present invention includes: a die in which a forming space is recessed inward from a top surface thereof; a partition wall partitioning the forming space into first and second forming spaces; a stripper disposed above the die and configured to descend to contact the die with the pouch film therebetween to fix the pouch film to be seated on a top surface of the die; and an electromagnetic force generation part disposed above the forming space and configured to generate electromagnetic force and configured to apply the electromagnetic force to the forming space.

An alkaline dry battery includes a battery case, a hollow cylindrical positive electrode accommodated in the battery case, a negative electrode disposed in the hollow portion of the positive electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolytic solution contained in the positive electrode, the negative electrode and the separator. The alkaline dry battery further includes a layer principally including a compound containing a polyoxyethylene group between the positive electrode and the inner surface of the battery case.

A battery pack and an electric vehicle are provided. The battery pack includes a battery sequence. The battery sequence includes multiple cells. A thickness of each cell extends along a first direction. The multiple cells are arranged in sequence along the first direction to form the battery sequence. At least one of the cells includes a metal shell and an electrode core packaged in the metal shell. An air pressure inside the metal shell is lower than an air pressure outside the metal shell. A gap is provided between at least two adjacent cells. A ratio of the gap to the thickness of the cell ranges from 0.001 to 0.15.

A cell (100) is provided, which includes a metal housing (11) and multiple electrode core strings encapsulated in the metal housing (11). The multiple electrode core strings are arranged in a second direction and sequentially connected in series. Each of the electrode core strings includes an encapsulation film (13) and multiple electrode core assemblies (12) arranged in a first direction and sequentially connected in series. The electrode core assemblies (12) are encapsulated in the encapsulation film (13). An air pressure between the metal housing (11) and the encapsulation film (13) is lower than an air pressure outside the metal housing (11).

A cell (100) is provided, which includes a metal housing (11) and multiple electrode core strings encapsulated in the metal housing (11). The multiple electrode core strings are arranged in a second direction and sequentially connected in series. Each of the electrode core strings includes an encapsulation film (13) and multiple electrode core assemblies (12) arranged in a first direction and sequentially connected in series. The electrode core assemblies (12) are encapsulated in the encapsulation film (13). An air pressure between the metal housing (11) and the encapsulation film (13) is lower than an air pressure outside the metal housing (11).

The invention relates to a poly(butylene terephthalate) (PBT)-based composition, comprising a) PBT, and b) another thermoplastic polymer from the group consisting of polypropylene (PP), and/or at least one polyester which is selected from the group consisting of liquid crystal polyester (LCP), poly(ethylene terephthalate) (PET) including low melting point polyester, poly(butylene naphthalate) (PBN) and poly(ethylene naphthalate) (PEN), to a method for preparing the PBT-based composition, to a use of the PBT-based composition according to the invention in increasing electrolyte resistance, in particular in battery applications, especially in Li-ion batteries, and to an article obtained from the PBT-based composition according to the invention.

The invention relates to a poly(butylene terephthalate) (PBT)-based composition, comprising a) PBT, and b) another thermoplastic polymer from the group consisting of polypropylene (PP), and/or at least one polyester which is selected from the group consisting of liquid crystal polyester (LCP), poly(ethylene terephthalate) (PET) including low melting point polyester, poly(butylene naphthalate) (PBN) and poly(ethylene naphthalate) (PEN), to a method for preparing the PBT-based composition, to a use of the PBT-based composition according to the invention in increasing electrolyte resistance, in particular in battery applications, especially in Li-ion batteries, and to an article obtained from the PBT-based composition according to the invention.