An end cover assembly includes: an end cover with a through hole for injecting electrolyte and a first clamping portion, wherein the first clamping portion is disposed along a circumferential direction of the through hole and is located on one side of the end cover away from an interior of the battery cell; a sealing ring for sealing the through hole; and a pressure relief device covering at least part of the sealing ring and closing the through hole; wherein the pressure relief device includes a second clamping portion, and is rotatable such that when the pressure relief device is rotated to a first position, the second clamping portion is clamped with the first clamping portion; and when the pressure relief device is rotated to a second position, the second clamping portion is disengaged from the first clamping portion.

An end cover assembly includes: an end cover with a through hole for injecting electrolyte and a first clamping portion, wherein the first clamping portion is disposed along a circumferential direction of the through hole and is located on one side of the end cover away from an interior of the battery cell; a sealing ring for sealing the through hole; and a pressure relief device covering at least part of the sealing ring and closing the through hole; wherein the pressure relief device includes a second clamping portion, and is rotatable such that when the pressure relief device is rotated to a first position, the second clamping portion is clamped with the first clamping portion; and when the pressure relief device is rotated to a second position, the second clamping portion is disengaged from the first clamping portion.

A non-aqueous electrolyte secondary battery including an electrode body having a positive electrode and a negative electrode, a non-aqueous electrolyte, and a battery case is provided. The battery case includes a case body having an opening and configured to house the electrode body and the non-aqueous electrolyte, and a lid configured to close the opening. The lid includes a plate-shaped lid body, a valve portion configured to open when the internal pressure of the battery case is higher than a valve opening pressure determined in advance, and a degassing portion configured to set to be an opening pressure higher than the valve opening pressure of the valve portion.

An end cap assembly, a battery cell, a battery, and an electrical device are provided. The end cap assembly is applicable to a battery cell. The end cap assembly includes: an end cap body; a pressure relief component, connected to the end cap body, where a first through-hole configured to inject an electrolytic solution is made on the pressure relief component, and the pressure relief component is configured to be actuated when an internal pressure of the battery cell reaches a threshold, so as to release the internal pressure of the battery cell; and a closing component, detachably disposed on the pressure relief component, where the closing component is configured to close the first through-hole.

A method for operating a battery with a hermetically sealed housing configured as a hardcase and containing at least one electrochemical cell based on an organic electrolyte is described. The method includes: opening the housing at a point configured to create a point of access to a housing interior so as to vent the at least one cell; and, after the opening, hermetically re-sealing the point of access to the housing interior. A battery which can be operated by this method is also described.

A method for operating a battery with a hermetically sealed housing configured as a hardcase and containing at least one electrochemical cell based on an organic electrolyte is described. The method includes: opening the housing at a point configured to create a point of access to a housing interior so as to vent the at least one cell; and, after the opening, hermetically re-sealing the point of access to the housing interior. A battery which can be operated by this method is also described.

According to an embodiment, a battery includes an outer container, a lid member, an electrode group, a current collecting tab, an electrode terminal, a clip plate, and a lead. The lead is joined with the current collecting tab with the clip plate attached to the current collecting tab intervening therebetween, and electrically connects the current collecting tab and the electrode terminal. The clip plate includes a pair of plate parts clipping the current collecting tab therebetween and a folded part. The folded part is adjacent to the current collecting tab from one side in a lateral direction intersecting a height direction, and folds the pair of plate parts with respect to each other.

The present disclosure provides a device for battery formation, which comprises a negative pressure mechanism, a connecting assembly and a suction joint. The negative pressure mechanism has a receiving cavity inside. The suction joint is provided to the negative pressure mechanism and communicated with the receiving cavity. The connecting assembly is provided as plurality in number, and the plurality of the connecting assemblies are provided to the negative pressure mechanism; each connecting assembly is communicated with the receiving cavity and used for being connected to a battery.

A cylindrical lithium battery and a producing method thereof are disclosed. The lithium battery includes a shell, a battery cell, a cathode battery cover-plate assembly and an anode battery cover-plate assembly. A cathode foil and an anode foil are separated by a separator and wind into a cylindrical battery cell. The cathode is of a multi-tab structure and the anode is of a full-tab structure. A sealing body is fixed on the cathode battery cover plate in a surrounding manner, and a safety valve is provided at the middle of the cathode battery cover plate. The anode battery cover-plate assembly includes a current collector, an anode battery cover plate and a current collector support. The current collector body is fixedly connected to the upper portion of the current collector support and is electrically connected to the anode battery cover plate via a current collector connecting portion.

A cylindrical lithium battery and a producing method thereof are disclosed. The lithium battery includes a shell, a battery cell, a cathode battery cover-plate assembly and an anode battery cover-plate assembly. A cathode foil and an anode foil are separated by a separator and wind into a cylindrical battery cell. The cathode is of a multi-tab structure and the anode is of a full-tab structure. A sealing body is fixed on the cathode battery cover plate in a surrounding manner, and a safety valve is provided at the middle of the cathode battery cover plate. The anode battery cover-plate assembly includes a current collector, an anode battery cover plate and a current collector support. The current collector body is fixedly connected to the upper portion of the current collector support and is electrically connected to the anode battery cover plate via a current collector connecting portion.