Battery pack, battery charging station, and charging method

A battery pack for an electric vehicle, comprising:

• a battery comprising a plurality of battery modules connected in series, the battery modules including a first battery module and a second battery module;
• a battery charging system, comprising:
• a first charging circuit configured to charge the plurality of battery modules in series to a first preset voltage;
• a plurality of second charging circuits each corresponding one or more of the plurality of battery modules, each of the second charging circuits being configured to charge a corresponding battery module to a second preset voltage individually, the plurality of second charging circuits including a second charging circuit connected to the first battery module and the second battery module;
• and
• a battery detecting system configured to selectively and independently charge the plurality of battery modules, the selectively and independently charging the plurality of the battery modules comprises:
• charging the plurality of the battery modules to the first preset voltage through the first charging circuit;
• detecting whether the plurality of battery modules have been charged to the first preset voltage through the first charging circuit;
• and
• when it is detected that the plurality of battery modules have been charged to the first preset voltage through the first charging circuit, switching off the first charging circuit and, switching on a second circuit connected to the first and second battery modules and charging the first battery module to the second preset voltage through the second charging circuit connected to the first and second battery modules.