Electric Bikes - My "36 volt" LiFePo battery shows 44 volts after charge??

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SnuffysBluff
10-15-08, 11:13 AM
New to electric transportation.
I've posted this on other bike forums but haven't gotten an answer yet.
500 watt, 36 volt, 20 amp Ping battery that I just installed on my bike and charged it overnight.
My Multimeter shows 44volts. Could Ping have sent me a 48 Volt by mistake or is something wrong somewhere? Is this typical? How would I verify amps? Do I need one of those Watt's up dodads?
I rode it around the parking lot of the local tavern this morning and it ran fine. 42 volt reading after.
Any help, advice, reassurance or theories will be appreciated.
Gary B
Thats normal for a 36 volt lithium iron phosphate battery. Mine is 45.3 off the charger - individual cells will go up to 3.77 volts on my ebikes.ca battery. 36 is very nominal and is maybe the "average" voltage until low voltage cutoff. A 48 volt battery would be well above 48 hot off the charger.
SnuffysBluff
10-15-08, 12:20 PM
Thats normal for a 36 volt lithium iron phosphate battery. Mine is 45.3 off the charger - individual cells will go up to 3.77 volts on my ebikes.ca battery. 36 is very nominal and is maybe the "average" voltage until low voltage cutoff. A 48 volt battery would be well above 48 hot off the charger.
My sigh of relief got my dogs to barking.
Thanks a bunch.
A side note...The motor is a golden motor with that much maligned rear wheel. I spent a couple of hours with it... put small washers under the spoke nipples, adjusted the spoke tension, even, tight and correct, three rim liners and put on a new (quality) tire and tube. Full tire pressure.
I seems to be a pretty good rim, actually, bomb proof even. We'll see.
Though I do have a couple of good double wall rims coming. 84003
I think part of the issue with the Golden hub is that some folks may have hoped that the rim would stand up to a 200 pound rider plus a 30 pound lead acid battery pack (which it probably would if the spoke tension were carefully adjusted by hand by a good wheel builder). If you're a light person like me (130 pounds) and use a lightweight battery, the rim gets about half as much stress.
SnuffysBluff
10-15-08, 04:49 PM
I think part of the issue with the Golden hub is that some folks may have hoped that the rim would stand up to a 200 pound rider plus a 30 pound lead acid battery pack (which it probably would if the spoke tension were carefully adjusted by hand by a good wheel builder). If you're a light person like me (130 pounds) and use a lightweight battery, the rim gets about half as much stress.
I'm six-five and weigh 240 so I guess i'll give it a good trial. 84012