Battery system for vehicle, on-vehicle battery module, and cell controller

摘要

A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits.

主权项

1. A monitoring device for a battery system that includes a plurality of cell groups, which are electrically connected in series, each include a plurality of battery cells, which are electrically connected in series, comprising:
a plurality of integrated circuits that are each provided in correspondence to one of the plurality of cell groups and each measure each of terminal voltages at the plurality of battery cells in a corresponding cell group, wherein the plurality of integrated circuits each comprise: a selection circuit that selects a terminal voltage of a battery cell that is a measurement target from among the terminal voltages input from the plurality of battery cells in the corresponding cell group, and outputs the terminal voltage; an AD converter that converts the terminal voltage, which is outputted from the selection circuit, from an analog value to a digital value; a selection signal generation circuit that outputs a selection signal for selecting the terminal voltage of the battery cell that is the measurement target, to the selection circuit so that the selection circuit executes a selection operation; and a diagnosis circuit that diagnoses whether or not the selection signal outputted from the selection signal generation circuit to the selection circuit is correct.