06-24-2022, 11:10 PM | #11 |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,939
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Re: Lithium terminals too hot too touch
Those terminals are M8, they should be able to carry the current without getting hot. Have you torqued the terminal correctly? Are your cables M8 as well or are they M10? If all that is OK then maybe the cables/terminals used inside the battery are incorrect and the terminals are heating up from the inside.
I second Volt_Ampares comment about not using 12v lithium batteries in a cart. |
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06-24-2022, 11:24 PM | #12 |
Not Yet Wild
Join Date: Jan 2022
Posts: 37
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Re: Lithium terminals too hot too touch
Okay, thanks that's helpful again. You suggested 100 amp continuous and 300 amp peak. I know you're not in the business of making specific battery recommendations, but since you're an expert and I'm an idiot, I would appreciate if you could point me in the right direction. Ideally I'd like to keep my 48volts under 2 grand all in.
If it matters, I have a D&D Regen motor rated at 18mph. I'm not concerned about speed. I'm concerned about batteries melting. Anything you could suggest would be helpful, sir. |
06-24-2022, 11:30 PM | #13 | |
Not Yet Wild
Join Date: Jan 2022
Posts: 37
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Re: Lithium terminals too hot too touch
Quote:
I am using brand new 2G and 4G cables for the series. |
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06-24-2022, 11:52 PM | #14 | |
Not Yet Wild
Join Date: Jan 2022
Posts: 37
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Re: Lithium terminals too hot too touch
Quote:
If it matters, I have a D&D Regen motor rated at 18mph. I'm not concerned about speed. I'm concerned about batteries melting. Anything you could suggest would be helpful, sir. |
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06-25-2022, 08:42 AM | #15 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,167
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Re: Lithium terminals too hot too touch
Make sure that the cable ends have the proper sized hole for the bolts. If the holes are oversized, you get a poorer electrical connection and more heat. Work on your connections - they should not get that hot just because your batteries are not that great. Turn your current settings down to conform to the battery specs.
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06-25-2022, 09:46 AM | #16 | |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,939
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Re: Lithium terminals too hot too touch
Quote:
And as already stated, the holes on the cable terminals should be a close match to the bolt diameter. |
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06-25-2022, 10:27 AM | #17 | |
Not Yet Wild
Join Date: Jan 2022
Posts: 37
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Re: Lithium terminals too hot too touch
Quote:
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06-25-2022, 11:45 AM | #18 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,167
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Re: Lithium terminals too hot too touch
Yes. I don't know a thing about Navitas - get help.
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06-25-2022, 01:15 PM | #19 |
Gone Wild
Join Date: Sep 2020
Location: Germany
Posts: 1,999
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Re: Lithium terminals too hot too touch
The Navitas controller comes with a "Battery Discharge Rate" setting of 200A, but that's too much for these batteries. I've read within the specs "Continous Discharge Rate 100A"!!! As Volt said, not really golfcart batteries. Reduce the discharge rate in the Navitas app to max 100A and check if your connections still get hot.
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06-25-2022, 05:14 PM | #20 |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,939
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Re: Lithium terminals too hot too touch
Even though the batteries are not appropriate for the task at hand, I still believe we have a terminal issue here, not an over current problem as the BMS should trip on an over current condition.
Limiting the controller current to 100A will reduce performance significantly. |
Tags |
batteries, heat, lithium, melt |
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