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BQ28550 not be charged



Hi:

We met bq28550 one stranger symptom that it is easy to be reproduced by EVM as below steps.

  1. Battery discharged to CUV flag be araised  under -20C temp..(Not connected any communication.)
  2. Moved this battery pack to the Room temp.;
  3. Relaxed about 30mins;
  4. Did charging failed for this battery pack;(Not connected any communication.)
  5. Connceted EV2300 and observed DSG flag off;
  6. Continue to do charging ,but it's still failed during connected EV2300 tool;

 

Thanks and Regards!