Battery cell, battery, and electrical device
Embodiments of this application provide a battery cell, which includes a housing and an electrode assembly. The electrode assembly is accommodated in the housing. A film structure is arranged at a position located on an inner wall of the housing and opposite to the electrode assembly. The film structure combines with the inner wall of the housing to form a capsule structure. An accommodation cavity is formed inside the capsule structure. In this way, the capsule structure is more space-efficient, and the battery cell is more structurally compact.
1 . A battery cell comprising:
a housing and an electrode assembly,
wherein:
the electrode assembly is accommodated in the housing;
a plurality of film structures are arranged, independent of each other, between the housing and the electrode assembly at different locations of inner walls of the housing and facing the electrode assembly;
each film structure combines with a respective inner wall of the housing to form a respective capsule structure, wherein a respective accommodation cavity is formed inside each capsule structure;
a respective fragile structure is arranged on a surface of each capsule structure, wherein each fragile structure is a nick on the surface of the corresponding capsule structure;
each fragile structure has a packaging strength that is different relative to the other respective fragile structure packaging strengths; and
in a descending order of the packaging strengths of the fragile structures, the accommodation cavities store a flame retardant, a gas absorbent, a lithium supplementing agent, and an electrolytic solution, respectively.
2 . The battery cell according to claim 1 , wherein each capsule structure is arranged at a position located on the respective inner wall of the housing and opposite to a respective sidewall of the electrode assembly.
3 . The battery cell according to claim 1 , wherein an explosion-proof valve is arranged on the housing, and one of the plurality of capsule structures is arranged at a position located on the respective inner wall of the housing and opposite to the explosion-proof valve.
4 . The battery cell according to claim 1 , wherein at least one of the plurality of capsule structures is formed by combining the corresponding film structure with two or three adjacent inner walls of the housing.
5 . The battery cell according to claim 1 , wherein the respective fragile structure arranged on the surface of the corresponding capsule structure faces the electrode assembly.
6 . The battery cell according to claim 1 , wherein
a membrane is arranged in each capsule structure, and the membrane is configured to partition a respective accommodation cavity in the capsule structure into a plurality of independent sections of the accommodation cavity.
7 . The battery cell according to claim 1 ,
wherein each fragile structure has a packaging thickness, that is different relative to the other respective fragile structure packaging thicknesses.
8 . The battery cell according to claim 1 ,
wherein each nick cuts into the surface of the corresponding capsule structure to define a depth that is different relative to the other respective nicks of the other capsule structures.
9 . The battery cell according to claim 1 , wherein the different packaging
wherein the respective packaging strengths of the fragile structures vary stepwise relative to one another.
10 . A battery, comprising the battery cell according to claim 1 .
11 . An electrical device, comprising the battery according to claim 10 , wherein the battery is configured to provide electrical energy to the electrical device.