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Is the 787 a failure ?
"Daryl" wrote in message
... It sounds like they are being overcharged. That is prevented by a simple card addition that prevents it on only of overcharging but undercharging. Easy fix. Daryl The Lithium medical and electric vehicle packs I worked on were controlled by ICs that monitored and recorded individual cell voltage and overall charge and discharge current. Those are point measurements that are easy to do. What's harder is detecting unexpected hot spots away from the temperature sensors. Minor differences (improvements) between the acceptance sample and production devices can change heat flow paths. http://www.mpoweruk.com/lithium_failures.htm |
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