Hi Folk's,
last night a overvoltage battery balancer #22 shut down the charger at 4.0V.
At first I thought it was a bad OV balancer detector but after replacing the
circuit it still did it so I put a scope across the battery cell and noticed
the charging pulsed waveform going from 3.3V to 4.0V 60 hz when adjacent cells
were fairly solid (signifying a high impedance condition). I thought I had a
bad cell but after sanding under the copper strap & adding 3M dielectric grease
& torquing back down, it charged perfectly with no faults, back to low
impedance. I found a few other battery terminal bolts not tight after 20k
miles (even with sealing paint on terminal bolts CALB 130). So it's best to
tighten terminal bolts on lithiums every 10k miles it seams. I used to tighten
terminal bolts on old lead GC batteries every 500 miles but didn't think it was
necessary with lithiums but apparently they need it as well just less often.
Best Regards,mark
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