10-29-2020, 01:48 PM | #11 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
|
Re: LiFePO4 Battery Charger
Perhaps PingEye3 has seen that model, I have not.
You can always try each trim-pot. Place your voltmeter on the charger output and leave it there. Use a small screw driver to turn VR2 slowly clockwise half-turn at the time up to two turns. If the voltage goes UP, then turn it counter-clock-wise. If the voltage does not change, put it back in the original position and try the the same procedure on VR3 then VR1. |
Today | |
Sponsored Links
__________________
This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum |
|
10-29-2020, 02:02 PM | #12 | |
Getting Wild
Join Date: May 2016
Location: Atlanta, GA
Posts: 129
|
Re: LiFePO4 Battery Charger
Quote:
|
|
10-29-2020, 02:17 PM | #13 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
|
Re: LiFePO4 Battery Charger
How many LiFePO4 cells do You have?
There is very little capacity above 3.6v (really 3.4v) so You don't need to charge to the limit. If You have 14 cells, set the charger voltage to 50.4v or 49v for more conservative level (approximately 1% less capacity). That VR2 should be the correct trim-pot if that charger follows the conventional functionality terminology found in other Lithium chargers. |
10-29-2020, 03:33 PM | #14 | |
Getting Wild
Join Date: May 2016
Location: Atlanta, GA
Posts: 129
|
Re: LiFePO4 Battery Charger
Quote:
I have 16 cells with a rated voltage of 3.2V and a charging limit voltage of 3.65V. So does 56V seem too safe? |
|
10-29-2020, 03:43 PM | #15 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
|
Re: LiFePO4 Battery Charger
I would use: 56v (3.5vpc x 16 cells), that will give You 99% of the cells capacity.
|
10-31-2020, 10:54 AM | #16 | |
Getting Wild
Join Date: May 2016
Location: Atlanta, GA
Posts: 129
|
Re: LiFePO4 Battery Charger
Quote:
Any clue what the left and right trimpots do? Should I tinker with them to see if I can get the 56V we discussed? |
|
11-05-2020, 01:33 PM | #17 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
|
Re: LiFePO4 Battery Charger
I would not mess with the other two trim-pots unless your charger is exceeding 11 amps.
The VR1 typically controls the output current and it should only be adjusted (current reduced) when you increase the output voltage in order to keep the power output below the charger's maximum rating. The VR3 trim-pot typically controls the current threshold levels and it should be properly calibrated from factory. |
11-05-2020, 03:01 PM | #18 | |
Getting Wild
Join Date: May 2016
Location: Atlanta, GA
Posts: 129
|
Re: LiFePO4 Battery Charger
Quote:
Any advice on how to test the amp output if my multimeter is only labeled at 10A? |
|
11-05-2020, 03:36 PM | #19 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
|
Re: LiFePO4 Battery Charger
If You don't have a BMS that can display current or access to a DC clamp meter than the best way would be an external amp meter.
There are several options for dash meters from $25 to $$$ on Amazon. I added a cheap hall effect sensor model like this one instead of using a shunt model that requires additional cable connections. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1You need to put it in an enclosure as it is not water proof. You also don't have to worry much about it unless you think your charger is getting unusually hot during charge. |
11-06-2020, 02:00 PM | #20 | |
Getting Wild
Join Date: May 2016
Location: Atlanta, GA
Posts: 129
|
Re: LiFePO4 Battery Charger
Quote:
|
|
Tags |
charger, evbatterycenter, lifepo4 |
|
Thread Tools | |
Display Modes | |
|
Similar Threads | ||||
Thread | Forum | |||
Lifepo4 Pack Specificatons | Lithium EZGO | |||
LifePO4 golf battery | Lithium EZGO | |||
LiFePo4 in 48v truck | Extreme DC! | |||
LiFePo4 batteries | Electric Club Car | |||
LiFePo4 conversion | Electric EZGO |