Cell voltage monitoring and self-calibrating device

摘要

A cell voltage monitoring and self-calibrating device for a plurality of battery cells connected in series is disclosed. The device includes a first voltage measurement unit, a second voltage measurement unit, a first compensation unit, a second compensation unit and a calculating unit. It can measure voltages of each cell in a battery pack which provides power to electric equipment and calibrates itself during measurement.

主权项

1. A cell voltage monitoring and self-calibrating device for a plurality of battery cells, comprising:
a first voltage measurement unit, for measuring voltages of a first battery cell and a second battery cell; a second voltage measurement unit, for measuring voltages of a second battery cell and a third battery cell; a first compensation unit, connected to the first voltage measurement unit, for adjusting the voltages of the first and second battery cells by multiplying the measured voltages of the first and second battery cells by a first compensation value; a second compensation unit, connected to the second voltage measurement unit, for adjusting the voltages of the second and third battery cells by multiplying the measured voltages of the second and third battery cells by a second compensation value; and a calculating unit, connected to the first voltage measurement unit, the second voltage measurement unit, the first compensation unit and the second compensation unit, for calculating the first compensation value and the second compensation value based on the voltages of the second battery cell measured by the first voltage measurement unit and the second voltage measurement unit such that the voltages of the second battery cell will be the same after being adjusted by the first compensation unit and the second compensation unit, thereby systematic measurement errors of each battery cells can be combined into a single variable for self-calibration.