Provided is a lithium battery, wherein the battery comprises an anode, a cathode, wherein the cathode comprises one or more transition metals, an electrolyte, and a porous separator interposed between the cathode and anode, wherein the separator comprises an anionic compound. Also provided are methods of manufacturing such batteries.

Provided is a lithium battery, wherein the battery comprises an anode, a cathode, wherein the cathode comprises one or more transition metals, an electrolyte, and a porous separator interposed between the cathode and anode, wherein the separator comprises an anionic compound. Also provided are methods of manufacturing such batteries.

An energy storage device includes: an electrode assembly; a case for storing the electrode assembly therein, the case having an electrolyte solution sealing portion where an electrolyte solution pouring hole formed in the case is sealed; and at least one partition member arranged in a gap formed between the case and the electrode assembly stored in the case. The partition member partitions the gap in the winding axis direction of the electrode assembly by surrounding the electrode assembly in the winding direction of the electrode. The electrolyte solution pouring hole is arranged at a position closer to one end of the electrode assembly than the partition member close to one end of the case is in the winding axis direction.

An energy storage device includes: an electrode assembly; a case for storing the electrode assembly therein, the case having an electrolyte solution sealing portion where an electrolyte solution pouring hole formed in the case is sealed; and at least one partition member arranged in a gap formed between the case and the electrode assembly stored in the case. The partition member partitions the gap in the winding axis direction of the electrode assembly by surrounding the electrode assembly in the winding direction of the electrode. The electrolyte solution pouring hole is arranged at a position closer to one end of the electrode assembly than the partition member close to one end of the case is in the winding axis direction.

The invention provides an ion-trapping agent for a lithium-ion rechargeable battery, which traps impurity metal ions generated from constituent parts of a lithium-ion rechargeable battery with high selectivity, has high adsorption capacity per unit mass, suppresses the occurrence of short circuit derived from impurities, and renders a liquid neutral such that the lithium-ion rechargeable battery is unlikely to influence an electrolyte solution, thereby imparting a long-life lithium-ion rechargeable battery. The ion-trapping agent for a lithium-ion rechargeable battery of the invention contains at least one phosphate selected from: (A) -zirconium phosphate having a specific composition in which a certain range of ion exchange groups are substituted by lithium ions; (B) -titanium phosphate having a specific composition in which a certain range of ion exchange groups are substituted by lithium ions; or (C) aluminium dihydrogen triphosphate having a specific composition in which a certain range of ion exchange groups are substituted by lithium ions.

Disclosed is a method for manufacturing an electrochemical cell, wherein an insulation failure product can be accurately rejected, and an electrochemical cell can be used again after the insulation failure inspection. In the method for manufacturing the electrochemical cell (1), which is configured by hermetically housing an electrochemical cell main body (20) such that the leading end of a metal terminal (21) protrudes to the outside of the outer housing (10), an impulse voltage is applied between the metal terminal (21) and a metal foil layer (12), the waveform of the voltage applied to the capacitance between the metal terminal (21) and the metal foil layer (12) is measured, and the insulation failure inspection step is performed.

An electrolytic solution is an electrolytic solution for an electrochemical device including a negative electrode including a magnesium-based material, and has a moisture content of more than 10 ppm and less than 500 ppm. The electrochemical device including a negative electrode including a magnesium-based material includes an electrolytic solution having a moisture content of more than 10 ppm and less than 500 ppm.

An electrolytic solution is an electrolytic solution for an electrochemical device including a negative electrode including a magnesium-based material, and has a moisture content of more than 10 ppm and less than 500 ppm. The electrochemical device including a negative electrode including a magnesium-based material includes an electrolytic solution having a moisture content of more than 10 ppm and less than 500 ppm.

A precharging circuit for precharging an intermediate circuit capacitor of a converter formed from at least one electrolytic capacitor using a grid current from a supply grid before the converter is connected to the supply grid and is used for the reformation of at least one electrolytic capacitor of the intermediate circuit capacitor. A method is provided for the reformation of an intermediate circuit capacitor of a converter formed from at least one electrolytic capacitor, which is connected to the supply grid using a precharging circuit. A converter is created for converting an AC grid voltage into a direct voltage or vice versa, with a device for the reformation of electrolytic capacitors of an intermediate circuit capacitor of the converter using an integrated precharging circuit of the converter. Existing hardware can be used for the reformation of electrolytic capacitors in a converter, and the expense associated with the reformation can be minimized.

A gas permeable member includes: a gas permeable sheet configured to allow a gas to permeate therethrough; a holder including a gas flow hole that allows the gas to circulate therethrough and configured to hold the gas permeable sheet inside the gas flow hole; a cover mounted on the holder so as to cover an opening of the gas flow hole on a side on which the gas is discharged; and a gas discharge path formed between the cover and the holder and configured to discharge the gas discharged from the gas flow hole between the cover and the holder.