Johnson Controls Inc., Milwaukee, WI, is proposing to automakers a spiral-wound lead-acid 36V battery coupled with a unique DC to DC non-inductive mosfet-based switching method (without a transformer), which provides 12V at 98% or greater efficiency and with minimal radio frequency and electromagnetic interference (RMI/EMI). The 36V battery (actually three 12V units coupled together) is tapped at each 12V segment such that one third of the time, in rapid sequence, 12V current is provided. ...

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