TOPOLOGY AND CONTROL STRATEGY FOR HYBRID STORAGE SYSTEMS
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United States of America Patent
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app pub date -
Mar 3, 2014
filing date -
Mar 3, 2014
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Abstract
A hybrid battery-charging device with input terminals for connecting a current source, first and second battery connections for connecting a lead-acid battery and a high-cycle chemical battery. A two-way DC/DC converter with first and second sets of terminals is connected with the second and first battery connections. A charge and discharge control system includes a controller unit, a control output for controlling the two-way DC/DC converter, and sensing inputs for sensing a charge state, an internal resistance of the lead-acid-battery and state of charge of the high-cycle chemical battery. The charge and discharge control system controls the two-way DC/DC converter such that the lead-acid battery is charged if its charge start is below a pre-determined threshold and that the high-cycle chemical battery is charged if its charge state is below a pre-determined threshold and if the state of charge of the lead-acid battery is above a pre-determined threshold.
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