Project:USB PD Battery Charger

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Revision as of 03:26, 17 October 2018 by Pakue (talk | contribs) (Created page with "As part of the ever-present electric longboard MkII project I need an elegant and flexible charging solution. However, the usual 10-12S (37-44V) lithium chargers are neither <...")
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As part of the ever-present electric longboard MkII project I need an elegant and flexible charging solution. However, the usual 10-12S (37-44V) lithium chargers are neither [1] , therefore a custom solution is needed. With the recent addition of the power delivery standard to the USB spec, up to 100W [2] can be delivered via a USB C cable. This gives a lot of flexibility to the choice of charger for on-the-go topping-off as well as a complete charging cycle of the batteries. This project will revolve around interfacing with the USB C charger to supply higher voltages and currents and to put this power into a regulated charging of the longboard batteries.

Specifications

The design specification of the final circuit:

  • 12s LiFePO4 (39.6V nominal) battery
    • adaptable to 12s LiIon
  • 100W max power
    • adaptive power adjust depending on charger
  • USB C interface
  • safety voltage cutoff and faulty battery detection
  • high efficient step-up conversion

USB C interfacing

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