Tuesday, December 2, 2014

Monitoring the Battery of the Boeing Dreamliner 787 would have helped to prevent damages

I guess you remember the trouble Boeing was faced with when the huge battery packs in the Dreamliner 787 some two years ago. The Auxiliary Power Unit Battery Fire was likely caused by several severe “cell internal short circuiting and the potential for thermal runaway of one or more battery cells, fire, explosion, and flammable electrolyte release”.

More precise Condition Monitoring would have helped to prevent such incidents – and would have shown very early that the design of the battery system was quite fragile.

One of the findings (page 91 of the released incident report) is:

“More accurate cell temperature measurements and enhanced temperature and voltage monitoring and recording could help ensure that excessive cell temperatures resulting from localized or other sources of heating could be detected and addressed in a timely manner to minimize cell damage.”

Click HERE for the complete official NTSB report.

Monitoring batteries is very crucial the more our life depends on these systems – in airplanes, in substations, power stations, mobile systems, communication infrastructure … It is not sufficient to have a battery – the batteries must be maintained, tested from time to time, and monitored continuously.

Two groups (I am aware of) have defined Battery Monitoring information models:

1. IEC 61850-90-9 (Use of IEC 61850 for Electrical Storage Systems)

Excerpt of the battery system (without further discussion):


2. IETF EMAN (Energy Management)

Definition of Managed Objects for Battery Monitoring / draft-ietf-eman-battery-mib-13


Click HERE for the EMAN draft for Battery Monitoring.

Battery monitoring could safe life!

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