Trouble in Paradise

[kevinmccune]

Here I am 'bikeless" again the Battery failed reading 6.2 volts now will not charge, the charger is erratic will not stabilize 0-26 volts.Just when I was getting in my groove, the parts for my step thru build have not arrived yet. The bike in question was a full suspension Aostirmotor,I admit my 16 mile route had about 10 miles of roughness, I had assumed that the ebike could stand that roughness because of the suspension, favorite bike, just Hockey Puck!( everything else is fine if I have to repower it I have the tech I can do it!)
[Just one thing] how can the battery and charger both fail simutaniously?

 

[indianajo]

Some switcher supplies go berserk if they don't have a proper load on them. A DVM is a 500 megohm or higher load, ie an open circuit. My chargers just stop and turn the red light on if I unplug them from the battery, but I don't try to measure their output then. You might get a decent reading if you loaded the charger with a 24 ohm 200 watt resistor instead of the battery.
A battery with bad welds in all the stacks is an open circuit. I bought two of those. Both had one stack of eleven working, that would stop working if I drew more than 50 watts or hit a bump. Not even a very severe bump. I cut the case off one to probe the BMS. Nothing on 10 stacks, proper voltage on one stack if it was connected to 50 ohms or higher.
See the battery threads for known sources of good batteries. Other than the patented ones designed for $5000 up bikes, I know of 3 - reentron in Shanghai, Em3ev in HK (both them risk your debit card being hacked without the FBI being involved) ebikeling.com in chicagoland. I think ebikeling requires you to buy a hubmotor kit. Ebikeling sells only 36 v batteries. Oh there is a US builder I didn't memorize the name of that builds 52 v batteries. I was told by owner of electric-bikes.com how incredibly stupid I was to run a geared hubmotor with a 48 v battery. That was about 9000 miles ago. Not every e-bike rider lives in California, where the punters burn up geared hub motors with great abandon, according to electric-bikes.com.

 

[kevinmccune]

Some switcher supplies go berserk if they don't have a proper load on them. A DVM is a 500 megohm or higher load, ie an open circuit. My chargers just stop and turn the red light on if I unplug them from the battery, but I don't try to measure their output then. You might get a decent reading if you loaded the charger with a 24 ohm 200 watt resistor instead of the battery.
A battery with bad welds in all the stacks is an open circuit. I bought two of those. Both had one stack of eleven working, that would stop working if I drew more than 50 watts or hit a bump. Not even a very severe bump. I cut the case off one to probe the BMS. Nothing on 10 stacks, proper voltage on one stack if it was connected to 50 ohms or higher.
See the battery threads for known sources of good batteries. Other than the patented ones designed for $5000 up bikes, I know of 3 - reentron in Shanghai, Em3ev in HK (both them risk your debit card being hacked without the FBI being involved) ebikeling.com in chicagoland. I think ebikeling requires you to buy a hubmotor kit. Ebikeling sells only 36 v batteries. Oh there is a US builder I didn't memorize the name of that builds 52 v batteries. I was told by owner of electric-bikes.com how incredibly stupid I was to run a geared hubmotor with a 48 v battery. That was about 9000 miles ago. Not every e-bike rider lives in California, where the punters burn up geared hub motors with great abandon, according to electric-bikes.com.

Well thanks a lot for that information,I didn't trust the display and dared the 16-mile rough and steep logging road mix Even though the display kept showing a disappearing 1 bar, the bike performed beautifully so thank the Lord, there is nothing wrong with charger or battery,I took the cover off that charger and it was actually of good quality with a nice circuit board, 3 toroids and a bunch of other components. Really starting to like Aostirmotor ebikes the online dealer was very responsive, wish there was a brick-and-mortar shop close that sold these My closest shop sells "Aventon" which for the money seem to be pretty good. If the Folks that sold me the full suspension bike continue as good I would risk it and buy another one online, the 'Aostirmotor bike looks "art deco" OTH it rides good and pulls like a Mule, thanks again for your time and advice.