Battery
A battery including a curved metal shell, a curved metal plate, and a curved electrode assembly. The curved metal shell has a curved surface and a plurality of side walls extending from the curved surface. The curved electrode assembly is disposed between the curved metal shell and the curved metal plate. The plurality of side walls are bound with the curved metal plate to seal the curved electrode assembly between the curved metal shell and the curved metal plate. By disposing a direction of an opening of the curved metal shell, the difficulty in the manufacturing process of the battery is greatly reduced, curved electrode assemblies in different structural forms are placed into the curved metal shell more conveniently and smoothly, and the energy density of the battery is also increased.
1 . A battery, comprising:
a curved metal shell, having a curved surface and a plurality of side walls extending from the curved surface;
a curved metal plate; and
a curved electrode assembly, disposed between the curved metal shell and the curved metal plate;
wherein the plurality of side walls are bound with the curved metal plate to seal the curved electrode assembly between the curved metal shell and the curved metal plate;
wherein a convex surface of the curved metal plate faces the curved electrode assembly and a concave inner surface of the curved metal shell faces the electrode assembly;
wherein the curved metal plate and the curved metal shell are formed of a same material and have a same curvature radius;
wherein the curved electrode assembly is a wound structure;
the curved electrode assembly comprises a cathode, an anode, and a separator; and the separator is disposed between the cathode and the anode;
the cathode is provided with at least one cathode tab, and the anode is provided with at least one anode tab;
a first electrode terminal is disposed on one of the plurality of side walls and is electrically connected to the at least one cathode tab; and
a second electrode terminal is disposed on another of the plurality of side walls and is electrically connected to the at least one anode tab;
wherein the plurality of side walls comprise a first sidewall, a second sidewall adjacent to the first sidewall, a third sidewall opposite to the first sidewall, and a fourth sidewall opposite to the second sidewall;
wherein the first sidewall and the third sidewall are horizontal sides extending parallel along a width direction of the curved metal shell, the second sidewall and the fourth sidewall are curved sides extending parallel along a longitudinal direction of the curved metal shell;
wherein the first electrode terminal and the second electrode terminal are disposed on the second sidewall and the fourth sidewall, respectively.
2 . The battery according to claim 1 , the plurality of side walls comprise a first flange; the curved metal plate comprises a second flange; and the plurality of side walls are bound with the second flange through the first flange.
3 . The battery according to claim 2 , wherein the first flange is integrally formed with the plurality of side walls, and the second flange is integrally formed with the curved metal plate.
4 . The battery according to claim 1 , wherein the curved electrode assembly comprises a groove or is formed with steps.
5 . The battery according to claim 1 , wherein the curved electrode assembly and the curved metal shell have the same curvature radius, and the curvature radius is greater than 8 mm.
6 . The battery according to claim 1 , a middle portion of the cathode is provided with a single cathode tab, and a middle portion of the anode is provided with a single anode tab.
7 . The battery according to claim 1 , wherein the curved electrode assembly comprises a plurality of cathode tabs and a plurality of anode tabs.
8 . The battery according to claim 1 , wherein the plurality of side walls are bound with the curved metal plate by welding.
9 . The battery according to claim 1 , wherein the curved metal shell comprises an opening formed by the curved surface and the plurality of side walls extending from the curved surface.
10 . The battery according to claim 9 , wherein the curved electrode assembly is disposed in the opening of the curved metal shell.
11 . The battery according to claim 10 , wherein the curved electrode assembly is fixedly disposed in the opening of the curved metal shell by bonding.
12 . The battery according to claim 9 , wherein the curved metal shell further includes an insulating and sealing component provided at a periphery of the first electrode terminal and a periphery of the second electrode terminal.
13 . The battery according to claim 12 , wherein the insulating and sealing component is made up of plastic.
14 . The battery according to claim 9 , wherein the curved metal shell further includes an explosion-proof valve for releasing gas generated in the opening of the curved metal shell.
15 . The battery according to claim 14 , wherein the explosion-proof valve provided at a side wall of the curved metal shell.
16 . The battery according to claim 1 , wherein the material of the curved metal shell and the curved metal plate is selected from any one of steel, aluminum and alloys.
17 . The battery according to claim 2 , wherein each of a length of the first flange and a length of the second flange ranges from 0.5 mm-3 mm.
18 . The battery according to claim 1 , wherein the first electrode terminal and the second electrode terminal are disposed on opposite side walls.