Bit the bullet Leaf Lithium build

[DaveTM]

Originally Posted by Sergio

Where are You measuring 3.97v?

If You measure the voltage between the outside terminals on the module, it should be twice as much.

My bad......it's 7.97V.

[BobBoyce]

Each module is 2 parallel X2 in series. 4 cells total. Yes, the center taps all tie together as well. Leave it all connected for a couple of days with wire that thin. I used bus bars, but my cells were not staggered for polarity yet at that point.

[DaveTM]

Originally Posted by BobBoyce

Each module is 2 parallel X2 in series. 4 cells total. Yes, the center taps all tie together as well. Leave it all connected for a couple of days with wire that thin. I used bus bars, but my cells were not staggered for polarity yet at that point.

BTW....I did just this. The Leaf's have been wired together for almost 2 days now. No rush as I don't have any other components yet. Ordered.....not yet here.

[BobBoyce]

Originally Posted by DaveTM

BTW....I did just this. The Leaf's have been wired together for almost 2 days now. No rush as I don't have any other components yet. Ordered.....not yet here.

I left my 100 A/H GBS cells wired together in parallel for over a month, while waiting on parts to arrive.

[DaveTM]

Originally Posted by BobBoyce

I left my 100 A/H GBS cells wired together in parallel for over a month, while waiting on parts to arrive.

Thanks Bob. I just received an email from ZEVA that my "stuff" should be shipped within two days. That gives me enough time to finish up my current project.....a .54 caliber flintlock build!!!

[BobBoyce]

I like building various calibers out using AR type platforms. Plenty of inexpensive parts available, and a little machining goes a long ways.

[DaveTM]

Originally Posted by BobBoyce

I like building various calibers out using AR type platforms. Plenty of inexpensive parts available, and a little machining goes a long ways.

That's true. I have one that I shoot at a "CMP rules shoot" just about every weekend.

[DaveTM]

Ok guys. Time for some EE help here. I received my two relays and I need\want to understand the correct hookup of these, as outlined in the ZEVA BMS16 install instructions.

So......is what I have in this pic the correct way to wire this up for the High Voltage?

[Volt_Ampere]

What current is your charger? Mine is 18 amps. For that you want #12 wire if it's relatively short and I would use #10 if it's longer than a couple feet.

Yes you want a diode across the relay coil. Make sure you install it in the correct direction.

[Sergio]

For the COM and NO relay contacts 10 gauge wire.

For the relay coil terminals 18 gauge.

yes for the diode with the striped end (cathode) towards the positive wire.

I don't like the Zeva wiring diagram, it makes no sense to keep the relays powered up all of the time as they suggest for both relays (parasitic load).

I would wire those inexpensive relays as I suggested in this post and eliminate the pricey gigavac relay they suggest.

http://www.buggiesgonewild.com/elect...ml#post1540819

Edit:
if you wire it like the Zeva diagram, the LV relay would need to be the expensive gigavac relay due to the current and duty cycle requirement.