@Lyman
A cell can be managed to not short. BTW, a cup of coffee can be managed to not spill or burn its contents consumer.
Link to exponent paper?
I have not read the materials report yet, it was hard to download. I will asap and get back.
Edit:
Browsed through materials and CT reports.
The cell case is stainless steel, stainless steel will be migrated inwards and deposited by arcing of internal parts to case.
The CT report shows cell bulging of main battery. This indicates that something is fundamentally wrong with battery management. This evidence of cell deterioration is a further step forward to figuring it out.
@syseng68k
Again, the BMU electronics in the same box is the better solution.
@syseng68k @whoever talked about 45A during 15 minutes
Please have a look at page 8 of recorders report 520291.pdf. The current of 40+A lasted only for 3-4 seconds
@Machinbird
3-4s of high current (45A) caused the conflagration! I estimate that BMS has less than 100ms to prevent electrically induced runaway after a cell short.
Thus am I afraid that temperature sensing will be too slow. Cell pressure sensing may be an interesting option.
Last edited by saptzae; 11th Mar 2013 at 11:02.
Reason: Clarify