| abstract |
This paper discloses a plate-shaped battery unit, the plate-shaped battery unit includes an electrode assembly and a battery case, the electrode assembly includes a positive electrode, a negative electrode and a separator, the electrode assembly is installed in the battery case, and the battery case The outer edge of the electrode assembly is sealed by thermal bonding, wherein the electrode assembly is configured such that each electrode plate having the same polarity is separated into at least two electrode parts having different planar shapes and different sizes, the electrode assembly is in the electrode assembly At least one outer corner where outer edges intersect each other at an angle of 30 degrees to 150 degrees is provided at a region where outer edges of the electrode parts intersect each other, and at each of the electrode plate and the separator Outer grooves are formed in regions corresponding to outer corners, such that the outer grooves are formed to be inwardly recessed. |