lithium low voltag cut off

Jim C · 03-30-2016, 12:35 PM

I'm in process of doing a lithium conversion and was thinking to tie into the Tow/Run switch wires for my low voltage cut off or would tying in at the key switch be better?

Volt_Ampere · 03-30-2016, 02:55 PM

Tow/run would be a good way but I just went with a loud alarm on mine. It's as loud as my original backup alarm.

Volt_Ampere · 03-30-2016, 02:57 PM

I'm not sure it's a good idea to have it just quit without warning. You could be crossing a road or something. Most electrics powered by Lithium have a limp mode.

Patela2oh · 03-30-2016, 05:01 PM

Where are you getting the pack? How many AHrs?

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Jim C · 03-30-2016, 07:07 PM

Quote:

Originally Posted by Volt_Ampere

Tow/run would be a good way but I just went with a loud alarm on mine. It's as loud as my original backup alarm.

Ya I've thought about that to. But I know if it is not shut down someone will keep going till it's too late.

It would be nice to be able to do a limp mode or an alarm but I would still want it to shut down at a certain point.

Jim C · 03-30-2016, 07:08 PM

Quote:

Originally Posted by Patela2oh

Where are you getting the pack? How many AHrs?

Sent from my iPhone using Tapatalk

I bought a whole battery.

Revolution · 03-30-2016, 08:43 PM

Quote:

Originally Posted by Jim C

I bought a whole battery.

What battery pack did you buy? Nissan leaf? Chevy Volt? Prius? Tesla?

Jim C · 03-30-2016, 08:49 PM

Leaf, see details here http://www.buggiesgonewild.com/elect...ion-x-2-a.html

Volt_Ampere · 03-31-2016, 09:18 AM

Then I recommend you do an alarm at around 15-20% SOC and only shut down at 10%. Without a BMS you should not trust that the pack is balanced well enough to go below 10 or 15% SOC. Remember that the lowest cell is the one will you kill if you take it too low.

Jim C · 03-31-2016, 06:18 PM

Ya, I was actually planning on cutting it off around 20%. I disconnected the back up alarm when I first got the cart, so I will utilize it for the alarm at about 25%

03-30-2016, 12:35 PM	#1
Jim C Gone Wild Join Date: Oct 2008 Location: Wildwood, FL Posts: 742	lithium low voltag cut off I'm in process of doing a lithium conversion and was thinking to tie into the Tow/Run switch wires for my low voltage cut off or would tying in at the key switch be better?

03-30-2016, 02:55 PM	#2
Volt_Ampere Gone Wild Join Date: May 2012 Location: Rio Verde, Az Posts: 7,171	Re: lithium low voltag cut off Tow/run would be a good way but I just went with a loud alarm on mine. It's as loud as my original backup alarm.

03-30-2016, 02:57 PM	#3
Volt_Ampere Gone Wild Join Date: May 2012 Location: Rio Verde, Az Posts: 7,171	Re: lithium low voltag cut off I'm not sure it's a good idea to have it just quit without warning. You could be crossing a road or something. Most electrics powered by Lithium have a limp mode.

03-30-2016, 05:01 PM	#4
Patela2oh Gone Wild Join Date: Mar 2016 Posts: 264	Where are you getting the pack? How many AHrs? Sent from my iPhone using Tapatalk
Patela2oh Gone Wild Join Date: Mar 2016 Posts: 264

03-30-2016, 08:49 PM	#8
Jim C Gone Wild Join Date: Oct 2008 Location: Wildwood, FL Posts: 742	Re: lithium low voltag cut off Leaf, see details here http://www.buggiesgonewild.com/elect...ion-x-2-a.html

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03-31-2016, 09:18 AM	#9
Volt_Ampere Gone Wild Join Date: May 2012 Location: Rio Verde, Az Posts: 7,171	Re: lithium low voltag cut off Then I recommend you do an alarm at around 15-20% SOC and only shut down at 10%. Without a BMS you should not trust that the pack is balanced well enough to go below 10 or 15% SOC. Remember that the lowest cell is the one will you kill if you take it too low.

03-31-2016, 06:18 PM	#10
Jim C Gone Wild Join Date: Oct 2008 Location: Wildwood, FL Posts: 742	Re: lithium low voltag cut off Ya, I was actually planning on cutting it off around 20%. I disconnected the back up alarm when I first got the cart, so I will utilize it for the alarm at about 25%

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