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02-06-2020, 01:42 PM | #1 |
Not Yet Wild
Join Date: Jan 2019
Posts: 67
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Calculate exact state of charge
What is the formula to calculate the exact state of charge for a 36v cart?
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02-06-2020, 02:05 PM | #2 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,406
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Re: Calculate exact state of charge
Get a refractometer > https://www.google.com/search?q=refr...hrome&ie=UTF-8
And test each cell ? |
02-06-2020, 02:49 PM | #3 |
Not Yet Wild
Join Date: Jan 2019
Posts: 67
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Re: Calculate exact state of charge
Sorry I knew what I meant but didn't express it correctly. I want to be able to calculate the SOC based on my pack voltage after a trip. Say its 37.4v at the end of the trip; how can I calculate SOC based on 38.2v full charge.
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02-06-2020, 04:29 PM | #4 |
Gone Wild
Join Date: Nov 2011
Location: S.E. Mi.
Posts: 531
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Re: Calculate exact state of charge
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02-06-2020, 06:05 PM | #5 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Calculate exact state of charge
Quote:
Different brand batteries have different SoC charts, what brand batteries do you have? To get a reasonably accurate SoC estimate using a SoC chart, the batteries have to be at rest. That means about 12 hours after being charged or about an hour after being used. Battery voltage drops when amps are drawn, so a SoC estimate made immediately after cart stops will be artificially low. However, the voltage recovery rate is exponential in nature and about 98% of the recovery occurs in the first 15 minutes. |
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02-06-2020, 11:21 PM | #6 |
Gone Wild
Join Date: Jun 2017
Location: Savannah, GA
Posts: 6,539
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Re: Calculate exact state of charge
I’ve been using the app from Revolution golf cars for a while. I think it’s called GolfCarCaddy. Works great on iOS, anyway.
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