Odd Ping Battery Pack behaviour

Batteries, Chargers, and Battery Management Systems.
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adamsavage79   100 W

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Re: Odd Ping Battery Pack behaviour

Post by adamsavage79 » May 29 2018 5:29pm

999zip999 wrote:
May 29 2018 11:44am
Dmnun has a repair thread on Ping batteries here on E.S. some where ?
I do have help from a friend who knows much more than me. Ping sent me a sort of how to diagram as well.
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999zip999   100 GW

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Re: Odd Ping Battery Pack behaviour

Post by 999zip999 » May 29 2018 7:11pm

I heat up the solder with a 80watt big tip solder iron like a weller. I heat up the pad and throw the hot melted solder pool at a piece of plywood. Be careful. Where glasses. You can use a solder sucker after you get the mass of solder off. I use a shish kabob wooden stick and heat the solder till fluid and use the wooden stick to separate the three tabs and get in there. Angle the Pax you don't melt solder down into the path or even put the pack sideways heat the tab throw the solder. The solder melt said only 300 the 400 degrees.

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adamsavage79   100 W

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Re: Odd Ping Battery Pack behaviour

Post by adamsavage79 » Jun 10 2018 2:32pm

I wanted to update this thread on the status of the Battery. I started to notice in the last few days to a week, that despite having over 10-12km on the freshly charged battery, I still have a high voltage reading. Suspecting that perhaps, the BMS "fixed" the weak cell, I checked the weak cell and compared it to the others. It was only off by 0.01 - 0.02 Volts.

The only thing I've done differently, is I leave the pack on the charger for a few hours after it's done the charge cycle, vs removing the charger right away. Perhaps this properly balanced the cell over time ??

I would need to run it close to, or to Low Voltage Cut off to be sure.

999zip999   100 GW

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Re: Odd Ping Battery Pack behaviour

Post by 999zip999 » Jun 10 2018 5:36pm

Leaving the battery on the charger after the light turns green is how you balance the battery. Sometimes it needs 24hr or more time. Running to lvc unbalances the battery.

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adamsavage79   100 W

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Re: Odd Ping Battery Pack behaviour

Post by adamsavage79 » Jun 10 2018 6:44pm

999zip999 wrote:
Jun 10 2018 5:36pm
Leaving the battery on the charger after the light turns green is how you balance the battery. Sometimes it needs 24hr or more time. Running to lvc unbalances the battery.
True, but running it close to LVC or past the voltage I got the LVC before, is a way to see if the pack is back to normal now. Will need more testing.

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www.recumbents.com   10 kW

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Re: Odd Ping Battery Pack behaviour

Post by www.recumbents.com » Jun 11 2018 1:47pm

As noted previously, that's just the way that LiFePo4 charging works. After the initial charge the charger turns off, the the BMS balances and the charger turns back on. This may happen a bunch of times over a couple hours. Because of this its best to just let the battery charge overnight.

My Ping battery is over 9 years old and it's still working fine. It was used heavily for 5 years, sat around for 4 years (I charged it every 6 months or so), and is now being used again.

Warren

999zip999   100 GW

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Re: Odd Ping Battery Pack behaviour

Post by 999zip999 » Jun 11 2018 2:02pm

The problem with older Ping and people is they like to use a 40amp controller and test going up hills wot till a cell poops. A 48v 20ah is rated 1,200 watts. The newer ones are much better.

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adamsavage79   100 W

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Re: Odd Ping Battery Pack behaviour

Post by adamsavage79 » Jun 11 2018 5:56pm

www.recumbents.com wrote:
Jun 11 2018 1:47pm
As noted previously, that's just the way that LiFePo4 charging works. After the initial charge the charger turns off, the the BMS balances and the charger turns back on. This may happen a bunch of times over a couple hours. Because of this its best to just let the battery charge overnight.

My Ping battery is over 9 years old and it's still working fine. It was used heavily for 5 years, sat around for 4 years (I charged it every 6 months or so), and is now being used again.

Warren
I've learned now, that is the best way to charge the battery. I always thought it was bad, and didn't know that it would balance.

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adamsavage79   100 W

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Re: Odd Ping Battery Pack behaviour

Post by adamsavage79 » Sep 18 2018 12:45am

It's a good thing I never got around to changing the cells, as now I have spare cells.. My entire E-bike was stolen from the locked laundry/bike room in my apartment. The only thing I have left of the kit, is the charger.... I got another mountain bike, but I can't afford the new kit or battery yet.

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fechter   100 GW

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Re: Odd Ping Battery Pack behaviour

Post by fechter » Sep 18 2018 7:45am

That sucks. Well, the thief won't get too far without a charger. If you have renter's insurance, it might be covered.
"One test is worth a thousand opinions"

999zip999   100 GW

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Re: Odd Ping Battery Pack behaviour

Post by 999zip999 » Sep 18 2018 10:28am

Sorry to hear of your lost. I have had two ebikes stolen. Looking into gps.

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