Power in Flux
Likes Likes:  0
Results 1 to 3 of 3

Thread: Please review my BMS schematic.

  1. #1
    Junior Member
    Join Date
    Jan 2013
    Post Thanks / Like

    Please review my BMS schematic.

  2. #2
    Empulse R #24 frodus's Avatar
    Join Date
    Aug 2010
    Portland, OR
    Post Thanks / Like

    My Social Networking

    Follow frodus On Twitter
    Missing fuse for DC-DC converter input
    Missing fuse for 72V battery
    Missing your main Contactor
    The charger should controlled by the BMS OV, not a switch

    What's the SCR for? turning on and off the charger? If so, it's in the wrong place. It should be on one of the charger leads.

  3. #3
    Senior Member
    Join Date
    Feb 2012
    Edmonds, WA
    Post Thanks / Like


    Is this a homebrew Battery Monitor with under/over voltage protection? Got to do some balancing to get to Manager in my book. Looks like the sense input is a resistor network plus a shunt and pack V to ADC(s) for 24 cell voltage measurements and the control is a relay in the output of the charger and a SCR in the path of the Controller. The charger is more likely to tolerate SCR throttling than the controller Some of these controllers are beasts you don't want to get inline with! Feedback for under V to the controller is better used to control a 1/2 speed input pin (depending on the controller) or cutting the KSI by relay.

    Follow the good advice on fusing!


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts