Battery

Abstract

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.   
     
     
         2 . The battery according to  claim 1 , wherein 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 1 , wherein the plurality of side walls comprise a first side, a second side adjacent to the first side, a third side opposite to the first side, and a fourth side opposite to the second side. 
     
     
         4 . The battery according to  claim 3 , wherein the first side and the third side are horizontal sides, and the second side and the fourth side are curved sides. 
     
     
         5 . The battery according to  claim 3 , wherein the first side, the second side, the third side, and the fourth side are all horizontal sides. 
     
     
         6 . The battery according to  claim 1 , wherein the curved electrode assembly comprises a groove or is formed with steps. 
     
     
         7 . The battery according to  claim 1 , wherein the curved electrode assembly and the curved metal shell have a same curvature radius, and the curvature radius is greater than 8 mm. 
     
     
         8 . The battery according to  claim 1 , 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; and a middle portion of the cathode is provided with a cathode tab, and a middle portion of the anode is provided with an anode tab. 
     
     
         9 . The battery according to  claim 1 , wherein the curved electrode assembly is a wound structure, and the curved electrode assembly comprises a plurality of cathode tabs and a plurality of anode tabs. 
     
     
         10 . The battery according to  claim 8 , wherein one of the plurality of side walls has a first electrode terminal and a second electrode terminal; and the first electrode terminal is electrically connected to the cathode tab, and the second electrode terminal is electrically connected to the anode tab. 
     
     
         11 . The battery according to  claim 1 , wherein the plurality of side walls are bound with the curved metal plate by welding. 
     
     
         12 . 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. 
     
     
         13 . The battery according to  claim 12 , wherein the curved electrode assembly is disposed in the opening of the curved metal shell. 
     
     
         14 . The battery according to  claim 13 , wherein the curved electrode assembly is fixedly disposed in the opening of the curved metal shell by bonding. 
     
     
         15 . The battery according to  claim 12 , wherein the curved metal shell further includes at least one terminal and at least one insulating and sealing component provided at the peripheries of the at least one terminal. 
     
     
         16 . The battery according to  claim 15 , wherein the at least one insulating and sealing component is made up of plastic. 
     
     
         17 . The battery according to  claim 12 , wherein the curved metal shell further includes an explosion-proof valve for releasing gas generated in the opening of the curved metal shell. 
     
     
         18 . 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. 
     
     
         19 . The battery according to  claim 11 , wherein each of a length of the first flange and a length of the second flange ranges from 0.5 mm-3 mm. 
     
     
         20 . The battery according to  claim 9 , wherein one of the plurality of side walls has a first electrode terminal and a second electrode terminal; and the first electrode terminal is electrically connected to the cathode tab, and the second electrode terminal is electrically connected to the anode tab.