BATTERY MONITORING SYSTEM AND BATTERY MONITORING CHIP

PROBLEM TO BE SOLVED: To restrain variation in the amount of power consumption among battery cell groups in a battery monitoring system in which a plurality of battery monitoring chips are provided in correspondence with each of battery cell groups.SOLUTION: Each battery monitoring chip is provided...

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1. Verfasser: OTAKE HISAO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To restrain variation in the amount of power consumption among battery cell groups in a battery monitoring system in which a plurality of battery monitoring chips are provided in correspondence with each of battery cell groups.SOLUTION: Each battery monitoring chip is provided in correspondence with a battery cell group, and includes: a battery monitoring function unit that monitors the state of each battery cell included in the corresponding battery cell group; and a regulator that generates driving voltage to be supplied to a configuration circuit of the battery monitoring function unit on the basis of power supplied from a battery. The battery monitoring chip is connected such that communication paths are in series and an input end of the regulator is connected with an output end of another regulator. A microcomputer is connected with the battery monitoring chip and is driven by the driving voltage generated by the regulator of the battery monitoring chip, causing power consumption of each battery cell. 【課題】複数の電池監視チップが、電池セル群の各々に対応して設けられた電池監視システムにおいて、電池セル群間の電力消費量のばらつきを抑制する。【解決手段】電池監視チップは、それぞれ、電池セル群に対応して設けられており、対応する電池セル群に含まれる電池セルの各々の状態を監視する電池監視機能部と、バッテリから供給される電力に基づいて電池監視機能部の構成回路に供給する駆動電圧を生成するレギュレータと、を有する。電池監視チップは、通信経路が直列となるように接続され、且つレギュレータの入力端が、他のレギュレータの出力端に接続するように接続されている。マイクロコンピュータは、電池監視チップに接続されており、電池セルの各々の電力消費を伴って電池監視チップのレギュレータによって生成された駆動電圧によって駆動される。【選択図】図3