Battery pack and power supply apparatus

A battery pack, comprising:

• a cell group comprising a plurality of cells;
• a first detection unit configured to detect a voltage of one cell of the plurality of cells;
• a second detection unit configured to detect an output current on a power supply circuit of the cell group;
• and
• a control unit at least electrically connected to the first detection unit and the second detection unit, wherein the control unit is configured to:
• acquire the voltage of the one cell, the output current on a power supply circuit of the cell group, and an internal resistance of the one cell;
• and
• dynamically adjust a discharge capacity parameter of the battery pack based on the voltage of the one cell, the output current on the power supply circuit of the cell group, and the internal resistance of the one cell.

A method for calculating a discharge capacity of a power supply apparatus, comprising:

• acquiring a first electrical parameter of the power supply apparatus, a second electrical parameter of the power supply apparatus, and a third electrical parameter of the power supply apparatus;
• dynamically adjusting a discharge capacity parameter of the power supply apparatus based on the first electrical parameter of the power supply apparatus, the second electrical parameter of the power supply apparatus, and the third electrical parameter of the power supply apparatus;
• and
• transmitting the discharge capacity parameter to a load connected to the power supply apparatus to enable the load to adjust a current operating state based on the discharge capacity parameter.