Need help with some details on this lithium conversion

[MCJEFE]

I may know someone I trust. Where are you located?

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[somfas]

I'm in North Florida

[cmysstailights]

What parts do you have so far

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[somfas]

I have the batteries (10 Leaf Modules already plated together with stock plates, angle iron, and a top aluminum plate for the Zeva parts), the Zeva EVMS and the 2 BMS modules that go along with it (they are wired up already with CAN bus cable and the individual battery wires), Zeva Monitor, Elcon Charger, your terminal protectors/cover (cmysstailights), and a steering column monitor mount. And wiring. Just need 400amp main fuse, and some version of HV and LV relays/contactors.

[cmysstailights]

For the high and low voltage i bought the gigavac. Couple of members use relays.

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[somfas]

Thanks. I was planning to get an MZJ as McJefe had pointed out. However, Ian indicated that it needed to be 12V at the coil. However, it seems it would need to be able to break an 82v circuit. I am unsure how they are labeled or what the exact terminology means. And I'm not clear on how to get away with only using one, instead of two contactors for HV and LV. If it trips on LV, not sure how I could then get the charger to charge it if it is connected to the same one. I have been hung up on this part for a few months. Thats why I have finally decided to try to find someone to finish the build for me; if I can.

[BBBHC]

Well I'm not sure how the wiring would be different in your scenario of utilizing 2 BMSs, clearly something would be different.

I would recommend drawing out on paper, then the gurus will be more likely to check it out and offer any suggestions/corrections. It helped me when I did my build.

Here is a link to my build thread of a specific post, where I had drawn out how I thought the wiring should be done, and another member corrected me. Again, you will have some difference, I'm just offering this as an example. Hope this helps!

http://www.buggiesgonewild.com/lithi...ml#post1595619

[cmysstailights]

Originally Posted by somfas

Thanks. I was planning to get an MZJ as McJefe had pointed out. However, Ian indicated that it needed to be 12V at the coil. However, it seems it would need to be able to break an 82v circuit. I am unsure how they are labeled or what the exact terminology means. And I'm not clear on how to get away with only using one, instead of two contactors for HV and LV. If it trips on LV, not sure how I could then get the charger to charge it if it is connected to the same one. I have been hung up on this part for a few months. Thats why I have finally decided to try to find someone to finish the build for me; if I can.

The gigavac is high and low i believe. Ill get you part number later.

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[cmysstailights]

Gv240. Gigavac. Here is my setup.
https://drive.google.com/file/d/14r9...w?usp=drivesdk
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[MCJEFE]

Originally Posted by somfas

Thanks. I was planning to get an MZJ as McJefe had pointed out. However, Ian indicated that it needed to be 12V at the coil. However, it seems it would need to be able to break an 82v circuit. I am unsure how they are labeled or what the exact terminology means. And I'm not clear on how to get away with only using one, instead of two contactors for HV and LV. If it trips on LV, not sure how I could then get the charger to charge it if it is connected to the same one. I have been hung up on this part for a few months. Thats why I have finally decided to try to find someone to finish the build for me; if I can.

The contactor or solenoid is basically nothing more than an electrically controlled switch or heavy duty relay. It has two sets of terminals on it. The large set of terminals is the switch part (or contacts) which has your battery connected on one side and the load on the other side. The small set of the terminals is the "coil" and is what controls the opening and closing of the contacts or switch.

In this case you need a solenoid which uses a 12v control (coil) signal from the BMS and compatible with 82v on the contacts (switch). Ian said that the MZJ-400A/12v would work and recommend using flyback diodes.

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