12-04-2021, 10:09 PM | #11 | |
Not Yet Wild
Join Date: Jun 2021
Posts: 43
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Re: Extreme Team Lithium 48V 100AH (58.4V) Pack
I think I had the SOC calibrated properly when I installed the pack. Fully charged it, let settle an hour and set meter to 100%. But when the meter read 17% once pack shut off. The Daly app was actually higher like 26% so we headed home but was still like 3 blocks away. The battery case meter was at 0% but was driving it until I was pushing it. Now I don’t trust it.
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12-04-2021, 10:59 PM | #12 | |
Gone Wild
Join Date: Dec 2016
Location: Kingsland, Georgia
Posts: 1,825
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Re: Extreme Team Lithium 48V 100AH (58.4V) Pack
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Something just isn't right and I can't put my finger on it. It almost seems like your charger is not completely charging the battery. I may have missed it but what charger are you using? Does the BMS automatically shut it off? Keep bumping this until someone more knowledgeable can explain what might be going on here. Or better yet, start your own thread and see who can jump in to help. |
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12-05-2021, 06:50 AM | #13 | |
Not Yet Wild
Join Date: Jun 2021
Posts: 43
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Re: Extreme Team Lithium 48V 100AH (58.4V) Pack
I agree, it seems like when the cart sits with no draw the voltage should remain close to the orginal settle value for a long long time (I know if will drop in the first hour or whatever ) but after that I would it expect to stay there for weeks . . . The charger is thier on board,it goes to trickle or whatever but honestly I need to be put a DMM on the pack and see what voltage it shuts off. I am not sure if the BMS disconnects it or if the charger has a voltage sense and does the swap.
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12-05-2021, 04:43 PM | #14 | |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,948
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Re: Extreme Team Lithium 48V 100AH (58.4V) Pack
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You can reset a coulomb counting (one with a shunt) SOC once the charger cuts off. Settling voltage will not lower the SOC as the SOC relies on current out vs current in, not voltage. If your battery is cutting off when your SOC meter gets to 17% then the battery capacity set in your SOC meter is 17% too high. So if you have 100Ah set as the battery capacity, lower it to 83Ah. Cheers Pat. |
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12-05-2021, 06:12 PM | #15 |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,948
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Re: Extreme Team Lithium 48V 100AH (58.4V) Pack
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