Search found 28 matches

by mikep_95133
Sat Mar 28, 2009 11:27 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

I just got buried in many projects. In fact a big one is starting this week, so I'll be on the sidelines again, but still watching.

Mike
by mikep_95133
Sat Mar 28, 2009 4:33 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

Thank you Derek.

Does this allow the same software or is it modified for 12v as well?

Mike
by mikep_95133
Sat Mar 28, 2009 2:17 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

Re: Got batteries at last!

Glad to see you used Rj11 jacks. I bought a few myself with the same intent, someday. Good luck with the 12v version. Is your schematic very much different than Peter's version?

Mike
by mikep_95133
Sat Dec 20, 2008 3:42 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

Isn't debug fun? It sure separates the boys from the men, or me from my sanity :wink: I'll be on vacation starting Monday. That excuse one for not having my BMS installed. #2 is that the second truck has taken all of my time to get corrections made to it's various electrical systems. It's basically ...
by mikep_95133
Mon Nov 17, 2008 3:33 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

Understood. The cells were installed down about 10ah on a 40ah cell. So I run these cells in a safe range. Every two weeks I take them out, recharge them to 4.0v each to see how many ah's they are below 40ah. Then load test them for capacity, then recharge and discharge them again to -10ah. Short dr...
by mikep_95133
Mon Nov 17, 2008 3:06 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

Re: Connecting slaves in analogue mode

Hi Mike, You still need to use 2 optos, U2 & U4, per board when using the slaves in analogue mode, All the U2 optos will be connected in parallel for the Max cell voltage cut-out. Think of this as a logical OR. The optos are required because the cells are at a different potential to each other....
by mikep_95133
Mon Nov 17, 2008 3:41 am
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

I only removed the opto's so that I could run the slaves as analog until I get the wiring to the cabin done. At that point the slaves get digital software and the master added. I have the 3.5" lcd from Ebay. I'm doing fine, just a bit distracted with the 2nd EV purchase and it's repairs. Here a...
by mikep_95133
Sun Nov 16, 2008 11:48 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

Thanks for the clarity Peter. I just wired the 3 slaves for digital, but programmed them for analog. I removed all 9 opto's from the 3 slaves as there is nothing for them to talk to. Eventually when I get the shielded cable installed from the battery box to the cabin, I'll program them back to digit...
by mikep_95133
Sun Nov 16, 2008 9:14 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

The Master board is not used at all with Analogue Slaves. This is different than the post on page 8. So I take it things have changed and the analog slaves should not and cannot use the master? A faq is something in my experience that you have a new person to the project read so they don't ask the ...
by mikep_95133
Sun Nov 16, 2008 4:26 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 1251447

Hi Gents, It occurred to me this morning as I was about to install the slaves onto the Lithium cells, that I don't know how to wire the slaves together in analogue mode. I assume the master is not connected. Maybe the slaves are not connected to each other at all? Same with the digital slaves. Is th...

Go to advanced search