999zip999 said:Those kits usually have a 22 amp a 26 amp and a 36 amp controller. So ?
nah not the charger... i mean if anyone is bored and wants additional reading homework heres my initial thread about the voltage coming in shy of 42... but i feel thats decent after closer monitoring across all packs... but i will solder both connections on each ond of the watt meter so i can monitor amount of charge and discharge in/out of the packs for referencebrumbrum said:It’s not your charger is it?
Correct cutoff? Correct charging procedure for chemistry? Correct charger?
Just a thought.
You can also use your watt meter between the charger and battery to see charging status.
djbrandonr said:one last bump and update... i ran this pack this week while doing deliveries...
most times I run it till its empty..meaning not empty empty as in WOT and no response but more like the pack is low enough to where I need to start pedaling more than necessary at which point I plug in my backup battery... I dont have a precise value but lets say 10% left..
Now Ive used it about 4-5times and the max charge Ive gotten is 41.6v is this good enough? All my other pre-fabbed batteries stop at 42 or just a hair above.
thx!
amberwolf said:I might have missed it, but I still haven't seen a list of voltages measured at your cells or cell groups, which is necessary to check balance of them.
djbrandonr said:ok, im gonna unwrap the battery here later, remove all the bus bars and then measure each cell voltage individually (while still in vruzend caps and in full pack form)... should i try and test for resistance or something and how?
That's kinda the point of what I've been posting, and why I've been trying to get you to check for this problem: if cells are not connected, or have poor connections (which you haven't tested for yet; the method has been described in previous posts), then that group does not have full capacity.djbrandonr said:only 1 cell in string 10 wasnt making contact with the cap ends.. but had a charge of 3.8v ... can one cell not making contact with the pack be the achilles heel??
amberwolf said:That's kinda the point of what I've been posting, and why I've been trying to get you to check for this problem: if cells are not connected, or have poor connections (which you haven't tested for yet; the method has been described in previous posts), then that group does not have full capacity.djbrandonr said:only 1 cell in string 10 wasnt making contact with the cap ends.. but had a charge of 3.8v ... can one cell not making contact with the pack be the achilles heel??
You'll still need to do the interconnect-resistance tests as described previously, once the pack is reassembled, to find out which cells besides that one have inconsistent and/or poor connections.
docw009 said:Your results and what I read about a similar battery in this thread tell me the system is problematic. It's bad contacts and some of your 6P groups are not 6P.
docw009 said:You'll have to run the battery down again til it triggers LVC.