Patent ID: 8487590
Filing Date: 2013-07-16
Classification: B60L,G01R,H01M,H02J,Y02E,Y02T

Abstract:
1. A cell controller comprising: a unit cell voltage detecting section which detects a voltage of each of a plurality of unit cells constituting a battery group through respective voltage detecting lines; and a SOC adjusting section which adjusts a state of charge (SOC) of each of the plurality of unit cells and which includes: resistors for SOC adjustment, switching elements and a control unit mounted in a control board for exercising ON/OFF control on the switching elements; wherein all or part of the resistors are disposed near the unit cells outside the control board, wherein the control unit switches the switching elements to an OFF state at a time of voltage detection based on the voltage detecting section, and wherein the control unit detects a voltage of a particular unit cell and simultaneously performs SOC adjustment to other unit cells which are not immediately adjacent to the particular unit cell, wherein, when a voltage of a first unit cell of the plurality of unit cells is detected, a first switch corresponding to the first unit cell is turned off to detect a voltage of the first unit cell, and, at a same time: wherein each of the resistors for a corresponding unit cell is inserted in series with respect to a corresponding voltage detecting line, and the unit cell voltage detecting section detects a voltage of each of the plurality of unit cells through the corresponding resistors, and wherein the control unit lets switching elements corresponding to respective unit cells to be adjusted enter an ON state at a time of SOC adjustment, so that the corresponding resistors respectively lead from positive and negative electrodes of the unit cells to be adjusted, and each of the serially connected resistors is connected in parallel to each of the unit cells to be adjusted, wherein, when a unit cell voltage is detected by the unit cell voltage detecting section, the control unit lets each of the switching elements corresponding to each of the unit cells whose voltage is to be detected, and each of unit cells disposed at higher and lower sides of each of the unit cells whose voltage is to be detected, enter an OFF state, and wherein the unit cell voltage detecting section, the switching elements and control unit of the SOC adjusting section are housed in an integrated circuit.