peterdambier
Well-known member
I have listened a bit on evtv.me and watched their tests.
At least for one cell, I am not sure if that is the famous, made in USA but imported from China and produced in Korea ...
They found what counts is the temperature of the electrodes, not cell temperature, not ambient temperature.
Charging below 0C = 32F is bad. It blocks parts of the electrodes and deteriorates current and capacity permanently. So charging slowly is bad, better get the batteries warm as fast as you can and keep them warm until fully charged. Disconnect before trickle charging begins.
Quick charging is good for the batteries. They charged with 3C. That means fully charging in 3 hours time if I got it correctly. Stop charging when you think it is 80%. It turns out later that the batteries are charged more than 90% at that moment.
Trickle charging and all kinds of slow charging is bad. You are going to overcharge without even noticing. That is what kills the batteries.
We have got some -7C = 19F right now. A rather unexpected winter and rather early for us. I plug in as soon as we come home and get it the full 230V/16 (14A actually) but I unplug as soon as I see charging gets slower. So I give away the final bar mostly. I hear the cooling system working time and again so I am sure it is warm enough for the batteries.
I have not found the Stone of the Wise. Maybe Jack Rickards has but even he says the results were not what they would have expected.
At least for one cell, I am not sure if that is the famous, made in USA but imported from China and produced in Korea ...
They found what counts is the temperature of the electrodes, not cell temperature, not ambient temperature.
Charging below 0C = 32F is bad. It blocks parts of the electrodes and deteriorates current and capacity permanently. So charging slowly is bad, better get the batteries warm as fast as you can and keep them warm until fully charged. Disconnect before trickle charging begins.
Quick charging is good for the batteries. They charged with 3C. That means fully charging in 3 hours time if I got it correctly. Stop charging when you think it is 80%. It turns out later that the batteries are charged more than 90% at that moment.
Trickle charging and all kinds of slow charging is bad. You are going to overcharge without even noticing. That is what kills the batteries.
We have got some -7C = 19F right now. A rather unexpected winter and rather early for us. I plug in as soon as we come home and get it the full 230V/16 (14A actually) but I unplug as soon as I see charging gets slower. So I give away the final bar mostly. I hear the cooling system working time and again so I am sure it is warm enough for the batteries.
I have not found the Stone of the Wise. Maybe Jack Rickards has but even he says the results were not what they would have expected.