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Unread 04-15-2018, 06:46 PM   #1
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Default Precedent 58v lithium build.

Thanks to E36 racer build thread I was able to get my own going. I still have some tweaking to do and some wiring to clean up but the cart is a blast!http://cloud.tapatalk.com/s/5ad3e351...-597691810.mp4

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Unread 04-15-2018, 07:54 PM   #2
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Default Re: Precedent 58v lithium build.

Quote:
Originally Posted by Jkerle View Post
Thanks to E36 racer build thread I was able to get my own going. I still have some tweaking to do and some wiring to clean up but the cart is a blast!http://cloud.tapatalk.com/s/5ad3e351...-597691810.mp4

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Need a count down for that thing.

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Unread 04-15-2018, 10:02 PM   #3
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Default Re: Precedent 58v lithium build.

Nice!
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Unread 07-05-2018, 02:08 PM   #4
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Default Precedent 58v lithium build.

I am working on similar project.
Chevy Volt lithium batteryís modified to 14s to get 58volts.
Alltrax 500 amp controller
400 amp solenoid

Iím trying to decide if I should use one or two modules of the Volt batteryís
Each pack will have a KWH rating of 2.2 KWH at 50.4 volt nominal, and about 58 volts fully charged.
I will have a 295 watt solar panel helping keep it charged when the sun shines....
Do you guys think one pack will be sufficient? Or should I install both?
If I go with just one, Iíll have lots of room to do clean wiring install.
Really just need to approximate the range of standard 4 12v lead acid.
Thanks, I always appreciate the help this forum provides.
Dennis


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Unread 07-05-2018, 03:17 PM   #5
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Default Re: Precedent 58v lithium build.

Quote:
Originally Posted by d_wittenborn View Post
I am working on similar project.
Chevy Volt lithium batteryís modified to 14s to get 58volts.
Alltrax 500 amp controller
400 amp solenoid

Iím trying to decide if I should use one or two modules of the Volt batteryís
Each pack will have a KWH rating of 2.2 KWH at 50.4 volt nominal, and about 58 volts fully charged.
I will have a 295 watt solar panel helping keep it charged when the sun shines....
Do you guys think one pack will be sufficient? Or should I install both?
If I go with just one, Iíll have lots of room to do clean wiring install.
Really just need to approximate the range of standard 4 12v lead acid.
Thanks, I always appreciate the help this forum provides.
Dennis


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.

I'll be very interested to see what you do to a Volt pack to get 58V out of it. They are very difficult to separate because the cell terminals are spot welded together. The Volt pack unaltered is 50.4V fully charged. You must have found a way to peel off a couple of cells to make the modification. Please post pics.
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Unread 07-05-2018, 04:46 PM   #6
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Default Precedent 58v lithium build.

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Originally Posted by PingEye3 View Post
.



I'll be very interested to see what you do to a Volt pack to get 58V out of it. They are very difficult to separate because the cell terminals are spot welded together. The Volt pack unaltered is 50.4V fully charged. You must have found a way to peel off a couple of cells to make the modification. Please post pics.
Here is one of them charged with accusense charger, which shuts off reliably below the 4.2 v per cell max charge.
Very interested to hear your thoughts on one or two packs, PingEye3. Your experience is well respected.

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Unread 07-05-2018, 06:05 PM   #7
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Default Re: Precedent 58v lithium build.

Dennis, I've been researching most of the day today on how to do exactly what you're doing without having to separate cells. Very difficult and dangerous it seems. How did you tie the additional 2 cells in with the 12s module?

I think you'd have enough range out of the 1 pack to probably equal 4 12V FLA batteries. I can't remember where now, but i found where a guy in a Hyundai cart reported around 15 miles with 1 pack. Riso, a member here, said he was getting 25 or 35 miles out of 2 packs equaling 94ah.
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Unread 07-05-2018, 06:23 PM   #8
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Default Re: Precedent 58v lithium build.

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Originally Posted by NCPW View Post
Dennis, I've been researching most of the day today on how to do exactly what you're doing without having to separate cells. Very difficult and dangerous it seems. How did you tie the additional 2 cells in with the 12s module?

I think you'd have enough range out of the 1 pack to probably equal 4 12V FLA batteries. I can't remember where now, but i found where a guy in a Hyundai cart reported around 15 miles with 1 pack. Riso, a member here, said he was getting 25 or 35 miles out of 2 packs equaling 94ah.


I used a Dremel tool to cut the black plastic top. This is a bit dangerous, but with appropriate care Iíve been able to successfully complete this twice. You must cut the metal connector, this is tedious with the dremel, as you must be careful not to go too deep. However, there is metal embedded in the plastic that must be cut, so if it doesnít separate, you have to go deeper.
On the main pack, cut the black plastic at the ends just enough to remove the end plate. (Make sure you pay attention to the polarity to achieve 14s series). After separating this section of 2s, (on the last section, one pouch goes with the other stays behind....this should be evident when you get that far) add it and itís endcap to the main pack. On one of the packs, I folded the metal connectors down and attempted to solder. This did not work well. On the other, I just folded them down and slid one of the buss bar connectors from pack disassembly between and underneath. This made a solid connection when I cinched the top of the pack together with large zip tie.


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Unread 07-06-2018, 11:49 AM   #9
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Default Re: Precedent 58v lithium build.

Quote:
Originally Posted by DennisWitt View Post
Here is one of them charged with accusense charger, which shuts off reliably below the 4.2 v per cell max charge.
Very interested to hear your thoughts on one or two packs, PingEye3. Your experience is well respected.

Thanks for that picture. I figured it would look something like you had done there. They aren't very easy separate to add the cells but are cheaper than leaf modules, though with lower AH capacity. Nick thought they weren't worth the effort to be able to reconfigure them to sell a 58V pack. For a DIY project it is probably worth it. Good job.
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Unread 07-06-2018, 07:10 PM   #10
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Default Re: Precedent 58v lithium build.



Decided to go with 2 packs to maximize amps available and to extend range. Cart has tons of torque. Still running stock motor...trying to decide if I want to upgrade the motor while Iím at it.


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