Today we got all the batteries wired up and after we found out the mine motor has an on board welder............... um...... well then it was ready to go. had a slight mis wire and made a welder out of the batteries!
yea it has a nice arc mark on the one battery terminal now. so, we got all the batteries wired up permanently, no more jumper cables. i do have fork lift plugs to put on yet but i have to get new pins since the ones i got are the wrong size. that way i will be able to detach it simply by unplugging it. so heres the technical data:
batteries:
8 - 24 volt 45 amp hour aircraft batteries 4 of which are wired in series to give 96-100 volts and then those are paralleled to the other set of 4.
our run test was as follows today:
10 minute run on notch 2 out of 4.
voltage at start up: 99.1 volts.
motor start, voltage drop: 93.6 volts.
after the 10 minute run only a .5 volt drop in battery voltage brought us to 93.1 volts.
after a slight recovery period of 10 minutes the battery voltage was back up to 98 volts.
so in conclusion, in a ten minute run we only lost a half of a volt during the run and just over a volt in total voltage after a 10 minute recovery.
im only going to run the batteries down to a 20 percent loss. so once the battery voltage reaches near 80 volts we will recharge it. from this test it appears we will be able to run our mine motor for quite a duration on a single charge. maybe even get a shift out of it so we can haul some coal