A cooling type housing (100) for housing a heating element (50) inside, including: an assembled metal housing (10); and a cooling flow path (30) provided at least on one surface (10A) of the metal housing (10), in which a heat medium flows, in which the cooling flow path (30) constitutes at least a part of the one surface (10A) of the metal housing (10).

Provided is a lithium secondary battery comprising: a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a first functional layer between the positive electrode and the negative electrode, wherein the first functional layer includes plate-like polyolefin particles having an average diameter of 1 μm to 8 μm, and the positive electrode includes a positive electrode active material layer including a positive electrode active material and a flame retardant, or has a stacked structure including a positive electrode active material layer and a second functional layer including a flame retardant.

A method of manufacturing a battery is disclosed. The method includes the steps of (A) suction-attaching the first separator to a winding core, (B) winding the first separator on the winding core, and (C) removing the wound electrode assembly from the winding core. The winding core includes a first group of holes and a second group of holes each formed in its outer circumferential surface. In step (A), suction is applied to the first separator through at least one of the first group of holes and the second group of holes, to suction-attach the first separator to the winding core. The first group of holes and the second group of holes are configured to be controllable so as to cause suction and gas discharge independently from each other.

Disclosed are a battery box, a battery cell, a battery, and a method and apparatus for preparing the battery box. The battery box includes a pressure relief region including a first recess arranged at an inner surface of the battery box and a second recess arranged at an outer surface of the battery box, the first recess being arranged opposite to the second recess, wherein a third recess is provided at a bottom wall of the first recess and/or a bottom wall of the second recess, and the pressure relief region is configured to fracture at the third recess, when an internal pressure of the battery box reaches a threshold, to relieve the internal pressure. According to the battery box, the battery cell, the battery, and the method and apparatus for preparing the battery box disclosed in the present application, the pressure relief region is easy to machine.

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.

The present invention provide a pouch type secondary battery and a method for manufacturing the same. More particularly, the present invention provides a pouch type secondary battery and a method for manufacturing the same, in which a pouch case is formed in a folding manner without being subjected to a forming process (press process), such that there is no limit in a length, and a thickness of an inner space of the pouch case is not limited.

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).

This secondary battery is provided with an electrode body formed by laminating a positive electrode and a negative electrode with a separator interposed therebetween. The separator includes a first layer and a second layer having a lesser thermal shrinkage than the first layer, and has a tubular part that is formed in a tubular shape and that constitutes the outermost surface of the electrode body. The tubular part, of the separator, that constitutes the outermost surface of the electrode body has a tape stuck thereto in at least one end portion in the axial direction, the tape pressing the one end portion in the axial direction from one side to the other side in the lamination direction of the electrode body.

This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode, and a nonaqueous electrolyte. The nonaqueous electrolyte contains a carboxylic acid ester and lithium bisoxalato borate. The concentration of the carboxylic acid ester is not less than 0.01% by volume but less than 10% by volume relative to the volume of the nonaqueous solvent. In addition, the concentration of the lithium bisoxalato borate is not less than 0.01 M but less than 0.2 M.