A cell and an assembly method thereof. The cell has an elongated structure with a positive electrode end and a negative electrode end. The negative electrode end is provided with a liquid injection hole, a tab protector and a single-cell collection board. A negative electrode column is connected to a negative tab on a cell core set through an aluminum plate, which is bendable to be accommodated into an accommodating cavity. The liquid injection hole is sunk into an avoidance hole on a top frame plate of the tab protector to clamp the tab protector. The electrolyte flows through the accommodating cavity to fill a core cavity, and the liquid injection hole is sealed by a sealing mechanism including a steel ball welded in thxoer liquid injection hole and a structural adhesive filled in the recess.

A cell and an assembly method thereof. The cell has an elongated structure with a positive electrode end and a negative electrode end. The negative electrode end is provided with a liquid injection hole, a tab protector and a single-cell collection board. A negative electrode column is connected to a negative tab on a cell core set through an aluminum plate, which is bendable to be accommodated into an accommodating cavity. The liquid injection hole is sunk into an avoidance hole on a top frame plate of the tab protector to clamp the tab protector. The electrolyte flows through the accommodating cavity to fill a core cavity, and the liquid injection hole is sealed by a sealing mechanism including a steel ball welded in thxoer liquid injection hole and a structural adhesive filled in the recess.

A cartridge including a body having a first surface and a second surface opposite the first surface, the first surface being configured to seat at least a portion of a first battery cell, and a first supporting pattern disposed in a first area along an edge of the first surface of the body and corresponding to a gas pocket of the first battery cell is provided. A battery module having a plurality of such cartridges is also provided.

A cartridge including a body having a first surface and a second surface opposite the first surface, the first surface being configured to seat at least a portion of a first battery cell, and a first supporting pattern disposed in a first area along an edge of the first surface of the body and corresponding to a gas pocket of the first battery cell is provided. A battery module having a plurality of such cartridges is also provided.

A secondary battery comprises: an electrode assembly to which an electrode lead is coupled; a pouch comprising an accommodation part configured to accommodate the electrode assembly with a front end of the electrode lead withdrawn to the outside, and a sealing part formed along a circumference of the accommodation part to seal the accommodation part; and a gas discharge part provided in the pouch to discharge a gas from the inside to the outside of the pouch and block an inflow of moisture from the outside to the inside of the pouch, wherein the gas discharge part comprises: a gas transmitting film having air permeability, by which the gas inside the accommodation part is discharged to the outside; and a moisture absorbing material that absorbs the passing through the gas transmitting film to block the inflow of the moisture from the outside to the inside of the pouch.

A secondary battery comprises: an electrode assembly to which an electrode lead is coupled; a pouch comprising an accommodation part configured to accommodate the electrode assembly with a front end of the electrode lead withdrawn to the outside, and a sealing part formed along a circumference of the accommodation part to seal the accommodation part; and a gas discharge part provided in the pouch to discharge a gas from the inside to the outside of the pouch and block an inflow of moisture from the outside to the inside of the pouch, wherein the gas discharge part comprises: a gas transmitting film having air permeability, by which the gas inside the accommodation part is discharged to the outside; and a moisture absorbing material that absorbs the passing through the gas transmitting film to block the inflow of the moisture from the outside to the inside of the pouch.

The battery rack includes: a plurality of battery modules; a rack case configured to store the plurality of battery modules; a control unit configured to control charging and discharging of the plurality of battery modules; a data storage unit including a cable configured to transmit data from the control unit and a data recording unit configured to store the data; and a storage unit including an accommodating case having an inside space for accommodating the data recording unit, a plurality of ventilation holes formed by opening a portion of the accommodating case so that the inside space and the outside are communicated with each other, and a cover portion that has a plate shape, is spaced apart from the plurality of ventilation holes by a predetermined interval, and is configured to cover the plurality of ventilation holes.

Provided are a top cover for a battery, a battery and an energy storage device. The top cover for the battery includes a mounting sheet and an explosion-proof valve. The mounting sheet has an opening defined thereon. The explosion-proof valve includes a valve body, an explosion-proof diaphragm and a valve cover. The valve body is mounted in the opening, and the valve body has a ventilation groove defined on an upper surface thereof. The valve cover is mounted on the upper surface of the valve body and configured to partially cover the ventilation groove. The explosion-proof diaphragm is mounted on a lower surface of the valve body. A cavity is defined by the valve body, the explosion-proof diaphragm and the valve cover and is in communication with outside through the ventilation groove.

A battery pack according to an embodiment of the present disclosure includes at least one battery cell including a vent portion configured to force gas out; and a pack case in which the at least one battery cell is accommodated such that the vent portion faces a lower side of the battery pack. The vent portion is exposed from the battery pack.

A battery pack (2; 602) includes: an outer case (12; 612); one or more battery cells (90a-90j); and a cell case (80), which is housed in the outer case (12; 612) and houses the battery cell(s) (90a-90j). The outer case (12; 612) has: an upper surface (wall) (14b), in which a terminal-opening part (22a) for exposing a terminal (102) is provided; a bottom wall (15e); and a plurality of side surfaces (walls) (15a-15d) extending upward from the bottom wall (15e). The battery cell(s) (90a-90j) is (are) disposed parallel to the bottom wall (15e). An opening (40a-40j) is provided in a specific side surface (15b, 15d), from among the plurality of side surfaces (15a-15d), that faces an end surface of the battery cell(s) (90a-90j) in a longitudinal direction.