The disclosure relates to the technical field of batteries, and proposes a battery and a battery apparatus. The battery includes: a housing; a cell, the cell disposed in the housing. A pole element is disposed on the housing. A heat sink is disposed on the housing.

The disclosure relates to the technical field of batteries, and provides a battery manufacturing method, a battery, a battery module, and a battery pack. The battery manufacturing method includes following steps. Providing an insulating mylar, laminating on the insulating mylar to form a laminated cell that includes a separator film different from the insulating mylar, and wrapping the laminated cell with the insulating mylar. By laminating on the insulating mylar to form the laminated cell and then wrapping the laminated cell with the insulating mylar, a process of moving the laminated cell to the insulating mylar is omitted.

The disclosure relates to the technical field of batteries, and provides a battery manufacturing method and a battery. The battery manufacturing method includes the following steps. Providing a first casing that includes one of an upper cover and a bottom plate of a battery casing, and laminating on the first casing to form a laminated cell.

The disclosure provides a battery, a battery module, a battery pack, and a battery manufacturing method. The battery includes a housing, a cell, and a pole column subassembly. The housing includes two first surfaces opposite to each other in a first direction. The cell is arranged in the housing. The cell includes a cell body and a tab portion. The tab portion includes two or more single-piece tabs extending from the lateral side of the cell body. When the single-piece tabs are flattened along the direction perpendicular to the lateral side of the cell body, the overlapping direction of the single-piece tabs is the first direction. The pole column subassembly is arranged on a first surface and connected with the tab portion. The orthographic projections of the tab portion and the pole column subassembly along the first direction are at least partially overlapped on a first surface.

The disclosure provides a battery, a battery apparatus and a battery manufacturing method. The battery manufacturing method includes: providing a first housing including an intermediate part and a first flange, and the intermediate part being a flat plate; or the intermediate part including a top wall and a first side wall enclosing a first accommodating cavity having an opening; providing a second housing including a bottom wall and a second side wall enclosing a second accommodating cavity having an opening, the second side wall extending outward from the opening of the second accommodating cavity to form a second flange, the depth of the first accommodating cavity being smaller than the depth of the second accommodating cavity; disposing a welding head at a side of the first housing away from the second housing, and welding the first flange and the second flange.

The disclosure provides a battery, a battery apparatus and a battery manufacturing method. The battery manufacturing method includes: providing a first housing including an intermediate part and a first flange, and the intermediate part being a flat plate; or the intermediate part including a top wall and a first side wall enclosing a first accommodating cavity having an opening; providing a second housing including a bottom wall and a second side wall enclosing a second accommodating cavity having an opening, the second side wall extending outward from the opening of the second accommodating cavity to form a second flange, the depth of the first accommodating cavity being smaller than the depth of the second accommodating cavity; disposing a welding head at a side of the first housing away from the second housing, and welding the first flange and the second flange.

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.

A rupture valve is formed on a wall of a container and has a break line along which a wall thickness of the rupture valve is decreased. The break line has an outer edge line which defines an outer edge of an opening region and a plurality of division lines which divide the opening region. The outer edge line has: a first base line and a second base line formed discontinuously such that the first base line and the second base line extend in a first direction, and are formed in a spaced-apart manner in a second direction orthogonal to the first direction; a first support portion forming line formed on a breaking portion of the first base line and extending from the first base line toward the second base line; and a second support portion forming line formed on a breaking portion of the second base line.