Provided are a lower plastic member and a power battery. The lower plastic member includes a body protruding towards a jelly roll of the power battery to form a protruding portion. The protruding portion has at least one ventilation channel defined thereon. A gas in the power battery flows outside through the ventilation channel. The body has a liquid injection hole and a flow guide shroud provided thereon. The flow guide shroud is arranged at an opening on a side of the liquid injection hole facing towards the jelly roll. The flow guide shroud includes a shielding plate and a plurality of connection posts. The shielding plate has an inclined surface facing towards the body and inclined towards a side away from the body in a radially outward direction of the shielding plate.

Proposed is a secondary battery including an electrode assembly, an electrode assembly, a plate disposed on both sides of the electrode assembly, and a pouch film coupled to the plate and accommodating the electrode assembly. The secondary battery has a structure in which the pouch film seals the outer edges of the plate to accommodate the electrode assembly, so that no cup is formed in the process of forming of the pouch film. As a result, there is no limit to the increase in thickness of the electrode assembly, thereby increasing the energy density per volume of the battery.

Proposed is a secondary battery including an electrode assembly, an electrode assembly, a plate disposed on both sides of the electrode assembly, and a pouch film coupled to the plate and accommodating the electrode assembly. The secondary battery has a structure in which the pouch film seals the outer edges of the plate to accommodate the electrode assembly, so that no cup is formed in the process of forming of the pouch film. As a result, there is no limit to the increase in thickness of the electrode assembly, thereby increasing the energy density per volume of the battery.

The disclosure relates to a power battery and a battery module. The power battery includes: a case including two openings opposite to each other; an electrode assembly formed by winding a positive electrode sheet, a negative electrode sheet, and a separator disposed around a winding axis, the electrode assembly being disposed in the case, and two opposite ends of the electrode assembly along the winding axis being respectively disposed corresponding to the two openings; a first cap assembly covering one of the two openings, the first cap assembly including a liquid injection hole communicating with an interior of the case; a second cap assembly covering the other opening, the second cap assembly including a through hole communicating with the interior of the case; in a length direction, the liquid injection hole and the through hole are located on a same side of a central axis of the case.

The disclosure relates to a technical field of batteries, and a battery and a battery apparatus are provided. The battery includes a cell, and the cell includes a cell body and tab portions. Each of the tab portions extends from one side of the cell body. The battery further includes a housing. The housing is a hollow structure, and the hollow structure is formed inside the housing. The cell is disposed in the housing, and the housing includes a first surface and a second surface opposite to each other. The first surface is provided with liquid injecting holes, and the liquid injecting holes penetrate the first surface and do not penetrate the second surface. An orthographic projection of the cell body on the first surface does not overlap the liquid injecting holes.

The disclosure relates to a technical field of batteries, and a battery and a battery apparatus are provided. The battery includes a cell, and the cell includes a cell body and tab portions. Each of the tab portions extends from one side of the cell body. The battery further includes a housing. The housing is a hollow structure, and the hollow structure is formed inside the housing. The cell is disposed in the housing, and the housing includes a first surface and a second surface opposite to each other. The first surface is provided with liquid injecting holes, and the liquid injecting holes penetrate the first surface and do not penetrate the second surface. An orthographic projection of the cell body on the first surface does not overlap the liquid injecting holes.

A battery cell includes a housing, an electrode assembly, a positive electrode column and a negative electrode column. The housing includes an accommodation cavity accommodating the electrode assembly. The positive electrode column and the negative electrode column are electrically connected to the electrode assembly, the positive electrode column and the negative electrode column respectively protrude from an outer end surface of the housing, the outer end surface is concave toward the accommodation cavity to form a concave part, and the concave part is disposed between the positive electrode column and the negative electrode column. A protecting member disposed at the concave part, the protecting member is electrically connected to the positive electrode column, and the protecting member is used for electrical connection with an external device or an external circuit. The concave part in the housing is formed concavely toward the accommodation cavity of the housing.

A technique is provided which reduces an external load, such as vibration and impact, applied on a boundary between an electrode body and an electrical collector tab. The herein disclosed secondary battery includes an electrode body, a case main body, and a cover. The cover includes an electrical collector terminal attached via an insulating material. The electrode body includes an electrical collector tab. The electrical collector tab includes an extension part that extends from the electrode body, and a branch part that extends from a tip end area of the extension part in a direction different from the extension part. The branch part includes a portion joined to the electrical collector terminal.

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.

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.