Battery charger design

Thread Starter

xand3r

Joined Mar 25, 2024
1
Would appreciate feedback for this circuit that I have designed, it provides battery power (when not stationary) to a rail that is normally powered by an AC/DC converter and accepts 9-20 V. The problem is that the rail and the load can't be separated and can only be accessed at point B1.

What I'm trying to accomplish:

  1. When connected to AC/DC converter at VIN1 device should be powered from the converter the entire battery circuit should be cut off and batteries charging.
  2. When connected to AC/DC converter at VIN2 device should be powered from the converter.
  3. When disconnected, run from battery power.
  4. Redundancy if one battery fails

Other notes, do not want to use a booster with EN pin.

charger_edit_3.png
 
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