Some embodiments of the present disclosure relate to a battery comprising a housing. In some embodiments, the housing comprises an opening. In some embodiments, the battery comprises at least one fluoropolymer membrane. In some embodiments, the at least one fluoropolymer membrane covers the opening of the housing. In some embodiments, the at least one fluoropolymer membrane has a crystallinity of 85% to 100%. In some embodiments, the at least one fluoropolymer membrane has a density of 2.0 g/cm.sup.3 to 2.2 g/cm.sup.3. In some embodiments, the at least one fluoropolymer membrane has a CO.sub.2 permeability to moisture permeability ratio of more than 0.5. A polytetrafluoroethylene film for electronic components, characterized in that the polytetrafluoroethylene film can have a density of 1.40 g/cm.sup.3 or higher and an air impermeability of 3,000 seconds or higher.

A battery pack includes a plurality of battery modules respectively having a discharge port configured to discharge a gas generated therein to the outside; a tray to which the plurality of battery modules are mounted, the tray having a discharge hole for discharging a gas to the outside; and a pair of side covers having body portions elongated in one direction and respectively located at one side and the other side of the tray, a plurality of inlets formed by opening a part thereof and respectively connected to the discharge port, and at least a gas discharge portion configured to transport a gas introduced from the inlet to the discharge hole.

In a battery casing a metal negative electrode that contains metal serving as a negative electrode active material and an air electrode are arranged so as to face each other in a state where at least a part of the metal negative electrode and the air electrode is immersed in an electrolytic solution inside a casing. The metal negative electrode is housed in a negative electrode housing in the casing. A separator separating the metal negative electrode and the air electrode is arranged at a side surface of the negative electrode housing. An opening through which inside of the negative electrode housing and outside of the negative electrode housing communicate with each other is provided on an upper surface of the negative electrode housing.

An energy storage apparatus includes: a plurality of energy storage devices each including a gas release valve, the plurality of energy storage devices being arranged along a predetermined direction in a posture where the gas release valves are directed in the same direction; an exhaust portion disposed on the gas release valves of the plurality of respective energy storage devices, the exhaust portion forming an exhaust path for a gas discharged from the gas release valves; and a housing accommodating the plurality of the energy storage devices and the exhaust portion, wherein the exhaust portion includes an exhaust port portion that protrudes from the housing and forms an outlet portion of the exhaust path.

The present application provides an end cover assembly, a battery cell, a battery, an electric device and a method for preparing a battery cell and an apparatus for manufacturing a battery cell. The present application provides an end cover assembly, where the end cover assembly includes: a cover plate provided with a pressure relief hole; a fixing member fixed on the cover plate, the fixing member having a first through hole and a second through hole, and the first through hole being opposite to the pressure relief hole; and a gas permeable membrane covering at least a portion of the pressure relief hole, an edge part of the gas permeable membrane being connected to the fixing member, and a portion of the edge part being embedded into the second through hole, so as to prevent the edge part from moving relative to the fixing member.

A battery module including a stack of battery cells, a U-shaped frame that accommodates the stack of battery cells and has an opened upper part, and at least two upper plates covering a part of the stack of battery cells at the opened upper part of the U-shaped frame is provided.

An electrochemical cell is provided, which includes a cathode comprising a three dimensional (3D) porous cathode structure, an anode, an electrolyte separator, comprised of a ceramic material, located between the cathode and the anode, and a cathode current collector, wherein the cathode is located between the cathode current collector and the electrolyte separator. The 3D porous cathode structure includes ionically conducting electrolyte strands extending through the cathode from the cathode current collector to the electrolyte separator, pores extending through the cathode from the cathode current collector to the electrolyte separator, and an electronically conducting network extending on sidewall surfaces of the pores from the cathode current collector to the electrolyte separator.

A pressure balancing device comprises a mounting seat, a breathable film and a drying component. The mounting seat comprises a mounting seat housing and a support portion connected to the mounting seat housing. A fluid channel is formed in the mounting seat housing, the support portion is disposed in the fluid channel, and the fluid channel is capable of fluidly communicating an interior space of a component to be depressurized with the external environment. The breathable film covers on the fluid channel. The drying component is disposed on the support portion and is located between the support portion and the breathable film, and the drying component is configured to absorb moisture entering the fluid channel. In the present disclosure, the drying component is provided inside of the breathable film of the pressure balancing device, and water vapor entering the pressure balancing device is absorbed by the drying component.

The present technology provides a battery that includes an air cathode, an anode, an aqueous electrolyte that includes an amphoteric surfactant, and a housing that includes one or more air access ports defining a total area of void space (“vent area”), where (1) the battery is a size 13 metal-air battery and the total vent area defined by all of the air access ports is from about 0.050 mm.sup.2 to about 0.115 mm.sup.2; or (2) the battery is a size 312 metal-air battery and the total vent area defined by all of the air access ports is from about 0.03 mm.sup.2 to about 0.08 mm.sup.2.

A battery shell, in particular, a battery shell for a traction battery of a motor vehicle, comprises a semi-permeable membrane that is integrally bonded or frictionally connected to the battery shell.