A battery cell, a battery, an electrical device, and a method and equipment for manufacturing battery cells are provided. In some embodiments, the battery cell includes a casing, a pressure-relief mechanism and a protective part. The casing has a wall portion. The pressure-relief mechanism is provided on the wall portion. The pressure-relief mechanism includes a weak portion and a first portion and a second portion provided on two sides of the weak portion. The weak portion is used to connect the first portion and the second portion, and the pressure-relief mechanism is configured in such a way that the weak portion is broken to release pressure when the pressure in the casing reaches a threshold value. The protective part is arranged on the pressure-relief mechanism, and the protective part is used to connect the first portion and the second portion to increase strength of connection between the first portion and the second portion.

A battery cell, a battery, an electrical device, and a method and equipment for manufacturing battery cells are provided. In some embodiments, the battery cell includes a casing, a pressure-relief mechanism and a protective part. The casing has a wall portion. The pressure-relief mechanism is provided on the wall portion. The pressure-relief mechanism includes a weak portion and a first portion and a second portion provided on two sides of the weak portion. The weak portion is used to connect the first portion and the second portion, and the pressure-relief mechanism is configured in such a way that the weak portion is broken to release pressure when the pressure in the casing reaches a threshold value. The protective part is arranged on the pressure-relief mechanism, and the protective part is used to connect the first portion and the second portion to increase strength of connection between the first portion and the second portion.

A secondary battery includes: a case member; a cover member having a through-hole and configured to close an opening of the case member; a terminal member passed through the through-hole; and a sealing member configured to close a gap between the cover member and the terminal member. The sealing member includes: an exposed end portion placed to be exposed inside the case member; and an extending portion extending from the exposed end portion toward the position of the through-hole. The cover member includes a first surface portion. The terminal member includes a second surface portion placed to face the first surface portion via a distance. The first surface portion and the second surface portion are placed to compress the extending portion. The distance between the first surface portion and the second surface portion increases toward the position of the exposed end portion.

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 manufacturing method and a battery are provided. The battery manufacturing method includes: providing a first housing, wherein the first housing includes an intermediate part and a first flange, and a first positioning part is formed on the first flange; providing a second housing, wherein the second housing includes a bottom wall and a side wall, the side wall extends upward from the bottom wall, the side wall encloses to form an opening, the side wall extends outward from the opening to form a second flange, a second positioning part is formed on the second flange, the intermediate part covers the opening, and the second flange is in contact with the first flange; positioning and aligning the first housing and the second housing through the first positioning part and the second positioning part; and welding the first flange and the second flange.

A battery manufacturing method and a battery are provided. The battery manufacturing method includes: providing a first housing, including a bottom wall and a side wall, wherein the side wall extends upward from the bottom wall, the side wall encloses to form an opening, the side wall extends outward from the opening to form a first flange, and a first reinforcing part is formed on the first flange; providing a second housing, wherein the second housing includes an intermediate part and a second flange, the intermediate part covers the opening, and the second flange is in contact with the first flange; and welding the first flange and the second flange.

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 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 lithium-ion battery module includes a housing having a plurality of partitions configured to define a plurality of compartments within a housing. The battery module also includes a lithium-ion cell element provided in each of the compartments of the housing. The battery module further includes a cover coupled to the housing and configured to route electrolyte into each of the compartments. The cover is also configured to seal the compartments of the housing.

A lithium-ion battery module includes a housing having a plurality of partitions configured to define a plurality of compartments within a housing. The battery module also includes a lithium-ion cell element provided in each of the compartments of the housing. The battery module further includes a cover coupled to the housing and configured to route electrolyte into each of the compartments. The cover is also configured to seal the compartments of the housing.