On 1/14/19 4:40 PM, Lawrence Rhodes via EV wrote:
I received the batteries quickly. They were both 13.38vdc. I did a 10 second
load test. My resistor smoked and the voltage held. After testing the voltage
on both batteries they were 13.35vdc. I couldn't be happier. However when
installing in the eGo scooter They act like dead batteries. The self test ends
with the display blacking out and the contactor doesn't engage I get 26.7vdc
for pack voltage. I did gas the old lead batteries and had to clean out a lot
of white powder from the battery bay. The bike works when using the charger
and the batteries charged up to 13.43vdc The bike functions, the motor lurches
forward the battery charges and the horn beeps. Turn off the charger and the
bike is dead. I did reconnect the green wire to the center of the pack. What
could cause this symptom? What does the green wire do? Lawrence Rhodes
You are running two Valence 12v batteries in series?
I have several of probably the same model that I've used for 12v only.
As I recall, the positive and negative on each battery goes to a SB50.
And that there are some other BMS wires that are intended to be used
only for serial connections.
Were I you, I would construct a "serializing" cable with other SB50s.
I imagine you can find some documentation online; I thought I had some
PDFs but haven't found them.
My GUESS is that you can just hook up the power terminals in series and
not worry about it.
If you like, I can take a look at my Valences tomorrow or the next day
and maybe refresh my memory.
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