01-30-2023, 08:05 AM | #1 |
Not Yet Wild
Join Date: Jul 2022
Posts: 23
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Ezgo txt fleet lithium battery
I was gifted a Samsung sdi battery from a 2017 lithium cart. The bms shuts the battery down every 10 minutes. Looking for troubleshooting tips.
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01-30-2023, 04:07 PM | #2 |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,919
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Re: Ezgo txt fleet lithium battery
You will need to determine if the shutdown is because the BMS is sensing a fault condition or if the BMS itself is faulty. Do you have a multimeter and can you check cell voltages? Post them here if you can.
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01-31-2023, 06:41 AM | #3 |
Not Yet Wild
Join Date: Jul 2022
Posts: 23
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Re: Ezgo txt fleet lithium battery
Each pack has a voltage of 54.84. Voltage at the BMS outputs are 53.5. Cart ran fine for exactly 10 minutes then shut down. Just setting idle, cart would shut down at exactly 10 minutes.
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01-31-2023, 07:44 AM | #4 |
Gone Wild
Join Date: Apr 2008
Posts: 2,223
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Re: Ezgo txt fleet lithium battery
sounds like a possible overtemp or similiar situation.. with a delay set to kick in at 10 minutes.. is there any way to communicate with the bms to see whats going on?
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01-31-2023, 09:04 AM | #5 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,122
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Re: Ezgo txt fleet lithium battery
It must be a 16 cell Life given the voltage. (if that's fully charged) It has to be a BMS issue. I do not know anything about their BMS and how it interacts with the rest of the EzGo cart. Should be a good battery though.
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01-31-2023, 11:10 AM | #6 |
Not Yet Wild
Join Date: Jul 2022
Posts: 23
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Re: Ezgo txt fleet lithium battery
I was thinking it was a bms problem. The cart is long gone. It was a trade in. We threw a rowpow battery and a navitas controller in it and it sold fast. Not sure where to start looking for a Bms, google search didn’t yield much. I have no way to test the bms.
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01-31-2023, 04:01 PM | #7 |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,919
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Re: Ezgo txt fleet lithium battery
Yea, I would just replace the BMS and be done with it. At 54.8v, chances are very high that the cells are good. BMS’s are a dime a dozen on AliExpress. That’s where I get mine from, but you really need to determine the cell type and count. Can you post a photo of the BMS, the cells and if possible, can you measure the cell voltage.
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02-01-2023, 08:53 AM | #8 | |
Not Yet Wild
Join Date: Jul 2022
Posts: 23
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Re: Ezgo txt fleet lithium battery
Quote:
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02-01-2023, 04:04 PM | #9 |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,919
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Re: Ezgo txt fleet lithium battery
It will be very difficult to have a single BMS with those packs but you can have a BMS on each pack. You will need access to a voltage tap at each cell bank. It’s hard to see from your photos. Can you post images of the BMS? Can you remove the BMS from its mounting as the voltage taps should be there.
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02-02-2023, 06:51 AM | #10 | |
Not Yet Wild
Join Date: Jul 2022
Posts: 23
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Re: Ezgo txt fleet lithium battery
Quote:
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