CURRENT SHARING IN PARALLEL BATTERY SYSTEM

Disclosed herein are battery packs, modular battery systems, and improved methods of impedance balancing for current sharing among parallel battery packs. Each parallel battery pack's impedance can be controlled by adding a controlled impedance and a control circuit. The controlled impedance is...

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Bibliographische Detailangaben
1. Verfasser:	CINAGROSSI, Nicola
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	Disclosed herein are battery packs, modular battery systems, and improved methods of impedance balancing for current sharing among parallel battery packs. Each parallel battery pack's impedance can be controlled by adding a controlled impedance and a control circuit. The controlled impedance is an impedance that can be varied, and/or controlled, using different impedance values. The control circuit communicates with other battery packs to determine impedance values (or an average impedance) for the other battery packs in a battery system. The controlled impedance can then increase the total impedance for the more highly used batteries (i.e., batteries delivering more current) to balance it with other less used batteries. By balancing impedance between parallel battery packs in a modular battery system, the current will be equally shared between the battery packs, thus ensuring all the battery packs in parallel have similar usage and similar operating lifetimes.