This application relates to an end cover assembly, a battery cell, a degassing method, a battery, and an electric apparatus. The end cover assembly includes: an end cover plate provided with a degassing hole, where the degassing hole penetrates through the end cover plate; and a degassing apparatus mounted in the degassing hole, where the degassing apparatus includes a columnar portion, a first limiting portion, a second limiting portion, a first elastic member, and a second elastic member. The columnar portion penetrates through the degassing hole. The first limiting portion and the second limiting portion are respectively located on an outer side and an inner side of the end cover plate. The first elastic member is located between the first limiting portion and the end cover plate. The second elastic member is located between the second limiting portion and the end cover plate.

A secondary battery is provided with a pouch, in which a sealing portion formed on an edge of the pouch is sealed when an electrode assembly and an electrolyte are enclosed. The secondary battery includes a valve which is mounted on a sealing portion so that one end the valve is disposed inside the pouch, and the other end of the valve is disposed outside the pouch and discharges a gas generated inside the pouch to the outside. The valve comprises an inner tube filled with an adhesive and made of a material that is deformed when swelling occurs. When the swelling occurs to increase in pressure inside the pouch, a gap is generated in a portion that is filled with the adhesive, and the gas within the pouch is discharged to the outside though the gap.

A secondary battery is provided with a pouch, in which a sealing portion formed on an edge of the pouch is sealed when an electrode assembly and an electrolyte are enclosed. The secondary battery includes a valve which is mounted on a sealing portion so that one end the valve is disposed inside the pouch, and the other end of the valve is disposed outside the pouch and discharges a gas generated inside the pouch to the outside. The valve comprises an inner tube filled with an adhesive and made of a material that is deformed when swelling occurs. When the swelling occurs to increase in pressure inside the pouch, a gap is generated in a portion that is filled with the adhesive, and the gas within the pouch is discharged to the outside though the gap.

An embodiment of the present application is provided with a battery box, a battery, a power consumption device, and a method for producing a battery and an apparatus for producing a battery. The box of the battery includes: an electrical chamber, configured to accommodate a battery cell group; a collection chamber, configured to collect emissions of the battery cell provided with the pressure relief mechanism when the pressure relief mechanism is actuated; an isolation component for isolating the electrical chamber and the collection chamber, such that the electrical chamber and the collection chamber are arranged on both sides of the isolation component; wherein a surface of the isolation component that is close to the battery cell group is provided with an avoidance opening, the avoidance opening extends along the first direction, and the plurality of pressure relief mechanisms of the battery cell group face the avoidance opening.

The present disclosure relates to an end cover assembly, a battery cell, a battery pack and a device. The end cover assembly includes a cover assembly, a terminal assembly, a sealing piece and a first connected flow channel. The cover assembly is provided with an installation hole, and the installation hole penetrates through the cover assembly along an axial direction of the installation hole; the terminal assembly is installed in the installation hole; the sealing piece is configured to seal the installation hole; the first connected flow channel is arranged in at least one of the terminal assembly and the cover assembly, and the first connected flow channel is configured as follows: when the sealing of the sealing piece is invalid, the first connected flow channel enables the inside and the outside of the housing to be communicated through the installation hole.

The present disclosure relates to an end cover assembly, a battery cell, a battery pack and a device. The end cover assembly includes a cover assembly, a terminal assembly, a sealing piece and a first connected flow channel. The cover assembly is provided with an installation hole, and the installation hole penetrates through the cover assembly along an axial direction of the installation hole; the terminal assembly is installed in the installation hole; the sealing piece is configured to seal the installation hole; the first connected flow channel is arranged in at least one of the terminal assembly and the cover assembly, and the first connected flow channel is configured as follows: when the sealing of the sealing piece is invalid, the first connected flow channel enables the inside and the outside of the housing to be communicated through the installation hole.

To solve the above problem, a venting device inserted into a sealing part of a pouch of a secondary battery according to the present invention includes: a housing inserted between confronting surfaces of the sealing part and sealed together with the sealing part; an element made of a metal and disposed in the housing and through which a passage is defined providing gas communication between an inside and an outside of the pouch; and a ball disposed at an outlet-side of the passage, the ball configured to open and close the passage, wherein, in the element, an edge of an inner circumference of a surface of the outlet-side of the passage is chamfered or filleted so as to face the ball, and the element includes: a surface treatment layer formed on the chamfered or filleted surface; and a layer made of a polymer and fused to the surface treatment layer.

A battery module includes: a battery cell stack in which a plurality of battery cells are stacked; and a module frame for housing the battery cell stack, wherein a vent is formed on the lower surface of the module frame, wherein the battery cell comprises: a cell main body; electrode leads formed to protrude from both ends of the cell main body; and a terrace part formed to extend from the cell case in a direction in which the electrode leads protrude, and wherein the vent is formed adjacent to a portion where the terrace part is located rather than the cell main body.

Discussed is a battery pack including a plurality of battery modules; a venting inducing frame disposed along edges of the plurality of battery modules and forming a venting passage to vent at least one of gas and flame; a venting gate to connect an inside of at least one of the plurality of battery modules and the venting inducing frame; and a quenching member disposed in a passage of the venting gate.

Discussed is a battery pack including a plurality of battery modules; a venting inducing frame disposed along edges of the plurality of battery modules and forming a venting passage to vent at least one of gas and flame; a venting gate to connect an inside of at least one of the plurality of battery modules and the venting inducing frame; and a quenching member disposed in a passage of the venting gate.