charger burnout because cell IR difference

[myzter]

My battery pack consists of 2x 5S1P Turnigy nano-tech 8000mah - so I charge them separately with B6 Ultimate 200W Balance Charger
one pack has two cells with higher IR and take longer to absorb charge... I noticed this after my charger fried...
after inspecting the fried charger insides I noticed a diode had started to fail, and the board was black at the diode contacts..

Now I have a brand new Icharger 206b 300w

Should I be worried that my charger will get fried like my last charger ??

 

[dnmun]

did you measure the diode with the diode tester on your voltmeter to establish that the diode had failed?

 

[myzter]

hello
no I did not.. black, burnt and melted..
charger would still powered on, but would not charge any battery I tried.. chucked it in the garbage

I had to resort to singly charging two cells of the pack very slowly and then charge last 3 cells together.. with 2 separate PSU

 

[dnmun]

infrared, now i get it. infrared radiation difference. that is what you have is infrared radiation difference investing in the diode a positive electron backwards force that prevents normal electrons from going through. i got it.

 

[circuit]

Chargers don't fail due to bad cells. Check for problems elsewhere.

 

[Hillhater]

...one pack has two cells with higher IR and take longer to absorb charge.

just how high is the IR of those cells ? ..20 mOhm,..50 mOhm,..100+ mOhm ?
..but that would not damage the charger !

 

[izeman]

...one pack has two cells with higher IR and take longer to absorb charge.

just how high is the IR of those cells ? ..20 mOhm,..50 mOhm,..100+ mOhm ?
..but that would not damage the charger !

+1. even if IR is higher on some cells, those cells will take longer to charge. but that's it. ok. balancing takes longer, but a charger should be able to balance a pack of 6 cells, even if 5 cells are full and 1 is totally oob. even if it takes hours ...

 

[friendly1uk]

infrared, now i get it. infrared radiation difference. that is what you have is infrared radiation difference investing in the diode a positive electron backwards force that prevents normal electrons from going through. i got it.

IR= Internal Resistance

It sounds like a fail component has led to the charger seeing an imbalance and switching off. Perhaps in to drain mode, but can't drain. Pity to of chucked it away

 

[myzter]

Well I got my new iCharger hooked up to a 350w PSU
And now the PSU died!!
I have a watt meter on the PSU output, which was measuring 311watts output..

Its a different thread:
http://www.endless-sphere.com/forums/viewtopic.php?f=1&t=50565