PPRuNe Forums - View Single Post - 787 Batteries and Chargers - Part 1
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Old 30th Jan 2013, 16:48
  #312 (permalink)  
syseng68k
 
Join Date: Jun 2009
Location: Oxford, England
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archae86:
Somewhere on those PCBs lives a function that "locks out" usage of the
battery if it is excessively discharged, which then must be removed and
returned to GS Yuasa.
Great info, thanks.

That's starting to give me feelings of dejavu, in that it's increasingly
common for equipment of all types to have no locally servicable parts.
The only recourse being to have the kit returned to the vendor, or their
designated agencies. Even where local servicing may be possible, service
information is often denied and it's designed to create an expensive
monopoly for the sole benefit of the vendor. In this case, why must the
battery go back to Yuasa and not the system integrator ?. At least, local
agencies should be able to interrogate the battery data log to determine
the detailed cause of the fault and thus eleminate spurious shutdowns due
to overzealous or faulty built in test.

Another cause is going past the allowed age limit.
Thats adds more weight to something discussed in a previous post, where I was
trying to work out why the data log for the burnt out battery appeared
to be unavailable. The suggestion was that the boards in the enclosure were
responsible for the data logging, (with good reason) and logged the whole life
of the battery. Because of board damage, the logged battery data would likely
be irrecoverable and make cause of failure very difficult to determine...

Regards,

Chris
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