PPRuNe Forums - View Single Post - 787 Batteries and Chargers - Part 1
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Old 7th Feb 2013, 00:45
  #533 (permalink)  
RR_NDB
 
Join Date: Feb 2011
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Hi,

Saptzae @ # 529

First i need to clarify some points to prepare my comment.

1) Destruction of # 3 was by what? Internally generated heat (due subcell inbalance, dendrites, voltage), ohmic losses due thousand Amps flowing to case (and ultimately to ground), or what?

2) On ground THICK wire you has two details: One seeming mechanical and another VERY PROBABLY caused by excessive current. Please refer to the equivalent circuit where i put the (highly probable due evidences) short circuit path.

3) Severe damage shows a PATTERN. Itīs up to us to establish a model rhat if is robust enough could explain most. I am just taken into account everything. Could we discard sabotage? Answer is NO. I prefer look to all details and balance them in the best proportions.

4) Shorting cell? Which one? Due over voltage, improper charging? Temperature of individual cell(s) not being measured?

5) to be continued...

Last edited by RR_NDB; 7th Feb 2013 at 00:48.
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