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Forum: Tech Log
13th Mar 2013, 01:56
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

This thread is mostly related to the APU incident which is good but how much is known about the other battery involving the air return & resultant cell damage?
Forum: Tech Log
11th Mar 2013, 08:02
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

I hate to think what the outcome would have been it this occured 4hrs from land over water!!:mad:
Forum: Tech Log
10th Mar 2013, 01:03
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

Keep in mind there are two failures of batterys from two different locations each with very simular end results. The report on the first indicates 17 mins after the APU was started from the APU...
Forum: Tech Log
28th Feb 2013, 00:08
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

There has never been any sense in keeping voltage across a Li-Ion battery when 100% SOC. It is like trying to overfill a fuel tank. But this is only one hole in the swiss cheese model.

Regards
Forum: Tech Log
21st Feb 2013, 23:09
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

don't know the solid state relays used but the units I've seen all have a protection diode which will pass current in the reverse & care is always needed where they are used. i.e. useful only where...
Forum: Tech Log
19th Feb 2013, 21:07
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

Redesign - remove all batteries & use super capacitors. End of story!!
Forum: Tech Log
11th Feb 2013, 09:06
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

Cell failure - multi current paths involving metal cased cells & metal battery case all resulting in further cell failures currents via earth straps bonding, heat etc. If need to stay with the same...
Forum: Tech Log
7th Feb 2013, 00:47
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

Ths Turin, I was focused on the local problem at the battery installation level!!
I hope it reads correct now.

Anyone able to give min voltage alowable before dispatch for this A/C?
Forum: Tech Log
6th Feb 2013, 22:59
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

On the question of containing a problem within a cell. How many prismatic shaped pressurised aircraft are flying? The question on the backup internal protection is where the fault will be found. I...
Forum: Tech Log
6th Feb 2013, 00:25
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

The whole installation has shown how the best of design can go wrong on so many levels. Internal shorts within the cells to case then via shielded cable to other components bypassing the disconnect...
Forum: Tech Log
4th Feb 2013, 01:31
Replies: 1,100
Views: 178,455
Posted By bill good

KILOMIKEDELTA

Two meltdowns different systems same battery. CRM extends to all sectors of aviation & attorneys are not part of the safety aspect BUT I am safe. (not worth much to any attorney these days & there...
Forum: Tech Log
3rd Feb 2013, 23:34
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

Would the aircraft not automatically disconnect the battery if any of the cells went out of tolerance both high or low ? Could someone who knows the B787 aircraft respond please.
Forum: Tech Log
3rd Feb 2013, 06:17
Replies: 1,100
Views: 178,455
Posted By bill good

B787 battery

Looking at the CT scans it appears the metal cases are touching & the internals are pushed out of shape which results in shorts everywhere!! Nothing would protect the pak if that occured & the charge...
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