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03-09-2019, 12:29 PM | #1 |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Bms gone bad?
7 module leaf pack pre assembled from ev battery center.
I think my bms has gone bad. I haven’t been driving the cart so I was leaving the charger unplugged just to keep the voltage a bit lower while I wasn’t using it. Middle of this week I plugged it back in so I’d have full charge this weekend. The pack was at 57.5 when I plugged it in. The charger kicked on for less than a minute, then shut down. I tried unplugging/plugging multiple times, but had the same result. I also tried cycling the bms off multiple times with the power button, but no luck there either. Pack got up to 57.7. I also can’t get the Wi-Fi connection on it to work, and the status light is showing a dim blue steady light, which isn’t normal. I’m going out now to unbolt the pack from the box I mounted it to so I can get to the 16 pin connector and disconnect the bms from the pack. I’m hoping to get lucky and maybe that’ll reset it. 🙏😂. I’ll also take some readings and see where each cell is at. There’s no brand identification on the bms, so I don’t have the ability to get any help from the manufacturer. Has anyone else had an issue like this? |
03-09-2019, 08:34 PM | #2 |
MOD of all BS!
Join Date: Sep 2011
Location: Florida
Posts: 17,477
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Re: Bms gone bad?
If it is like mine, that switch is only for the Wifi. But I have had mine go crazy twice and I pulled the connector, waited a few minutes, plugged it back in (and all of my cells were then reading high numbers) and by the next morning it had settled out and was fine.
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03-10-2019, 02:07 PM | #3 |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: Bms gone bad?
Thanks Nole, that gives me some hope.
I’m heading out to the garage now to dismount the pack so I can access the plug. Maybe I need to reconsider the orientation of my pack. I mounted it that way with the idea of keeping the plug and the pack terminals to the rear so nothing would contact them and possibly cause any damage. I ran my issue by Gary and he’s waiting to hear if unplugging it fixes it. He had one recently where the Wi-Fi quit working. I’ll update as soon as I know. |
03-11-2019, 09:10 AM | #4 |
Just Gone
Join Date: Sep 2015
Location: North Carolina
Posts: 3,549
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Re: Bms gone bad?
Yes, I would definitely re-orient your pack and any connection/component to make it as easy as possible to troubleshoot if need be. It would be a lot more easier on you back in the long run
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03-14-2019, 08:15 AM | #5 | |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: Bms gone bad?
Quote:
Will do. Unfortunately, I couldn’t get it to work. I checked the cells, and all seem ok, so maybe the Wi-Fi part just went out. I’ve tried multiple devices, but nothing is recognizing a signal from the bms. |
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03-14-2019, 08:16 PM | #6 |
MOD of all BS!
Join Date: Sep 2011
Location: Florida
Posts: 17,477
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Re: Bms gone bad?
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