Multi-level automotive battery charging system

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries

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Details

320 6, 320 17, H01M 1044, H01M 1046, H02J 700

Patent

active

054443520

ABSTRACT:
An electric charging control unit is used to control charging of a dual voltage battery of an automobile electrical system. The charging control unit is used in conjunction with a standard 12 volt alternator or 12 volt charger to efficiently recharge a lead acid battery having both 12 and 16 voltage terminals. The electric charging control unit continually monitors the different voltage levels of the battery. Charging of higher voltage cells by a DC to DC converter is selectively activated when the voltage of the lower cells rises above a pre-determined voltage level. Activation of the charging of the higher voltage cells is selectively overridden in response to the voltage differential of the input and output of the DC to DC converter which are respectively coupled to the 12 and 16 volt battery terminals.

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