EQUALIZATION DEVICE

摘要

A microcomputer finds a variation in respective unit cells based on an output from a voltage detection circuit, and executes equalization by controlling FETs and connecting unit cells having high both-end voltages in the unit cells to discharge resistors to perform discharging when the variation in both-end voltages of the unit cells is greater than or equal to a prescribed value, or executes the equalization by controlling FET pairs and sequentially connecting charging capacitors to the respective unit cells when the variation is smaller than the prescribed value.

主权项

1. An equalization device that equalizes both-end voltages of a plurality of unit cells connected to each other in series, comprising:
a voltage detector for detecting the both-end voltages of the unit cells, respectively; a discharge resistor; a plurality of first switches that connect the unit cells to the discharge resistor, respectively; a first equalizer for executing equalization by controlling the first switches and connecting each unit cell having a high both-end voltage in the unit cells to the discharge resistor to perform discharge; a charging capacitor; a plurality of second switches that sequentially connect the charging capacitor to the respective unit cells; a second equalizer for executing the equalization by controlling the second switches and sequentially connecting the charging capacitor to the respective unit cells; and an equalization selector for selecting the first equalizer to execute the equalization when a variation in both-end voltages of the unit cells is equal to or greater than a prescribed value, or selecting the second equalizer to execute the equalization when the same is smaller than the prescribed value.