Method for determining state of charge and electronic device thereof

An electronic device comprising:

• a battery, supplying power of the electronic device;
• a storage medium, storing a plurality of discharge curves and a plurality of commands;
• and
• a controller coupled to the battery and the storage medium, the controller being configured to execute the plurality of commands, wherein the plurality of commands comprise:
• determining that the battery is in a discharge mode;
• measuring a current C-rate and a current voltage of the battery in the discharge mode;
• selecting a first discharge curve and a second discharge curve from the plurality of discharge curves according to the current C-rate, wherein a first C-rate corresponding to the first discharge curve is greater than the current C-rate, and a second C-rate corresponding to the second discharge curve is less than the current C-rate;
• and
• calculating a state of charge of the battery according to the first discharge curve and the second discharge curve, wherein
• the plurality of discharge curves comprise a first discharge curve set having a C-rate greater than the current C-rate and a second discharge curve set having a C-rate less than the current C-rate,
• among each of C-rates corresponding to the first discharge curve set, the first C-rate is closest to the current C-rate, and
• among each of C-rates corresponding to the second discharge curve set, the second C-rate is closest to the current C-rate.