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1. (WO1999005766) FAULT-TOLERANT BATTERY SYSTEM EMPLOYING INTRA-BATTERY NETWORK ARCHITECTURE

Pub. No.:    WO/1999/005766    International Application No.:    PCT/US1998/015210
Publication Date: Fri Feb 05 00:59:59 CET 1999 International Filing Date: Fri Jul 24 01:59:59 CEST 1998
IPC: G01R 31/36
H02J 7/00
Applicants: MINNESOTA MINING AND MANUFACTURING COMPANY
HYDRO-QUEBEC CORPORATION
Inventors: HAGEN, Ronald, A.
CHEN, Kenneth, W.
COMTE, Christophe
KNUDSON, Orlin, B.
ROUILLARD, Jean
Title: FAULT-TOLERANT BATTERY SYSTEM EMPLOYING INTRA-BATTERY NETWORK ARCHITECTURE
Abstract:
A distributed battery system includes a number of energy storing modules, each of which includes a processor and communications interface. In a network mode of operation, a battery computer communicates with each of the module processors over an intra-battery network and cooperates with individual module processors to coordinate module monitoring and control operations. The battery computer monitors a number of battery and module conditions, including the potential and current state of the battery and individual modules, and the conditions of the battery's thermal management system. A module transitions to a stand-alone mode of operation if the module detects an absence of communication connectivity with the battery computer. The module processor autonomously coordinates monitoring of current, potential, and temperature conditions, effects bypassing of defective cells, equalizes cell voltages during charge and discharge cycles, and detects and logs fault conditions arising in the module.