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Old 11-24-2022, 09:08 AM   #1
Beerdude77
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Default Eco battery and cold(er) weather

Happy Thanksgiving! I am wondering if those of you with Eco batteries have had any issues running them in cold(er) weather? (Between 40-60*F) I have an Extreme Team right now and I am thinking about making a switch to Eco if I don't have to trick the BMS by using a battery warmer like I do with the Extreme Team. Currently I have to use a battery warmer to raise the BMS to the 80*F range then I can drive around but obviously the temp of the pack begins to fall once I do. I want to be able to use the battery in temps as low as 40* without the worry the battery will cool off below 60* and shut down like the ET does. For background I run a Navitas 5kW AC motor, 600amp controller and HD solenoid, with 2g wiring. Thanks in advance
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Old 11-24-2022, 09:35 AM   #2
Volt_Ampere
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Default Re: Eco battery and cold(er) weather

That BMS setting is crazy and not necessary. There is no issue with driving with a Lithium battery all the way down to Freezing and even below - other than loss in performance. The only significant issue is charging and there you don't want to ever charge if the battery itself is below 32F. I use my cart in the winter when it's 40 degrees here.
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Old 01-14-2023, 02:22 PM   #3
augiedoggy
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Default Re: Eco battery and cold(er) weather

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Originally Posted by Volt_Ampere View Post
That BMS setting is crazy and not necessary. There is no issue with driving with a Lithium battery all the way down to Freezing and even below - other than loss in performance. The only significant issue is charging and there you don't want to ever charge if the battery itself is below 32F. I use my cart in the winter when it's 40 degrees here.
This is why having access to the bms setting via an app and being able to adjust them is a plus in my mind. I thought beer dude had this ability with the daly bms his battery has but apparently not for some reason? Once this was suggested in his other thread he went dark and never responded. I know the bms his battery has does have the bluetooth module installed on it so it should be a very simple fix unless theres something that hasnt been shared?

If he doesnt want to check the setting its completely his choice of course but we have multiple threads more or less complaining of this issue now so you would think he would want to correct it or at least check it?
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Old 11-24-2022, 09:43 AM   #4
WalterM6
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Default Re: Eco battery and cold(er) weather

Beerdude, here's something you can try. I have an Alltrax Controller and I disabled the turbo mode. It was putting an excessive current draw on my Lithium Battery causing it to shut down in cold weather. I believe there is an equivalent setting with the Navitas and they call it turbo. Try disabling it and see if that helps.
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Old 11-24-2022, 01:10 PM   #5
Beerdude77
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Default Re: Eco battery and cold(er) weather

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Originally Posted by WalterM6 View Post
Beerdude, here's something you can try. I have an Alltrax Controller and I disabled the turbo mode. It was putting an excessive current draw on my Lithium Battery causing it to shut down in cold weather. I believe there is an equivalent setting with the Navitas and they call it turbo. Try disabling it and see if that helps.
I took a look in the app and do not see turbo as an option. I do have a setting "Battery Discharge Limit (A)" Would lowering that have the same effect?

Thanks
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Old 11-24-2022, 01:44 PM   #6
DaveTM
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Default Re: Eco battery and cold(er) weather

I hunt in temps as low as 12 degrees. Now, this is a Leaf pack. The cold weather effects the distance\run time of the pack for sure. Even in that temp my battery pack temp has never fallen below 32 degrees.

I don't know if there are settings on the drop 'n drive lithium batteries that shut down the pack for the reason of "cold".

I would think "standard settings" of VPC would cover any issues with the battery in very low temp's. But then, I have no experience with drop 'n drive setup. I'm only commenting on the "why we can't drive in cold temp" stuff.
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Old 11-24-2022, 06:36 PM   #7
WalterM6
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Default Re: Eco battery and cold(er) weather

What actually shuts down the pack is the reduced capacity in cold weather. When it's cold the load voltage decreases and when you apply a heavy load like going up a hill it drops the cell voltage below 2.5 volts (40v Pack voltage)and the BMS trips off. I never had this problem with my Leaf Batteries so maybe it's a LiFePo4 problem.
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Old 11-24-2022, 06:43 PM   #8
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Default Re: Eco battery and cold(er) weather

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Originally Posted by WalterM6 View Post
What actually shuts down the pack is the reduced capacity in cold weather. When it's cold the load voltage decreases and when you apply a heavy load like going up a hill it drops the cell voltage below 2.5 volts (40v Pack voltage)and the BMS trips off. I never had this problem with my Leaf Batteries so maybe it's a LiFePo4 problem.
Sound like a spot on DX.
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Old 11-24-2022, 07:02 PM   #9
WalterM6
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Default Re: Eco battery and cold(er) weather

Beerdude, I looked in the Navita settings and the only thing I see that might be similar to Turbo is the Maximum Acceleration setting. If it's set to max it may be causing you a problem in cold weather. Also lowering the max battery current to about 300 could help. One last thing. Keep an eye on the dash voltmeter and see how low it's dropping.
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Old 11-24-2022, 09:11 PM   #10
Beerdude77
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Default Re: Eco battery and cold(er) weather

Perhaps it is the reduced capacity at colder temperatures but would ambient temperatures in the low 50's really have this much effect?
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