Methods and systems for managing multi-cell batteries

A resistor ladder comprising identical resistors is disposed electrically in parallel with a multicell battery to calibrate voltage-controlled oscillators or analog-to-digital convertors for voltage balancing the battery cells in the multicell battery. Switches in a first state provide the voltage across each resistor as inputs to the VCOs or ADCs. The number of oscillations of the output signal of each VCO or ADC over a predetermined time period are compared to determine an offset error. Switches in a second state provide the voltage across each battery cell as inputs to the VCOs or ADCs. Thebattery cells with a higher relative voltage can be discharged until they are balanced. Some aspects describe temperature-adjusted and interpolated determinations of electrical quantities in the cells such as voltage and/or current. 包括多个相同电阻的电阻梯与多单元电池并联电设置以校准压控振荡器或模拟数字转换器，以平衡多单元电池中的电池单元的电压。处于第一状态的开关提供每个电阻器两端的电压作为VCO或ADC的输入。比较每个VCO或ADC的输出信号在预定时间段内的振荡次数，以确定偏移误差。处于第二状态的开关提供每个电池单元两端的电压作为VCO或ADC的输入。电压相对较高的电池单元被放电，直到它们平衡为止。一些方