It looks like my adaptor plate should be finished this week and shipping ne=
xt week, so it's going to be time to really get busy and finally get my lit=
tle Datsun truck on the road. I could use some input on the 12 volt system.
=
The first option I am considering is building a 14 volt house battery. Sin=
ce I am using BB600 cells this would be simple and give me up to 40 ahrs of=
power. I have lights, a couple of contatctors, a heater blower, a blower =
for cooling my motor and windshield wipers to potentially run off this. I =
think a fully charged battery should give me a full hour of run time even i=
n a worst case scenario, and since these are NiCads they should hold a nice=
steady voltage. The downside to this approach is that I could potentially=
run this battery down and find myself stuck, of course with a set of jumpe=
r cables I could jump my house battery from my main pack and be on my way I=
suppose.
=
The next option would be to add a small DC/DC converter. I even have one t=
hat is rated 36 - 72 volts and 17 amps. It is the twin to the one I use on=
my motorcycle. I could set the voltage to a level that would kick in if t=
he house battery begins to sag under load. The problem with the one I alre=
ady have is that I am planning on running my main pack at a bit over 72 vol=
ts nominal (66 1.2 volt cells), and I'm not sure how the DC/DC will like th=
is.
=
The last option I have been considering is a voltage doubler to feed a regu=
lar proven EV style DC/DC like an IOTA. This has a few advantages that I l=
ike. First, there is a good chance that this truck may end up at 144 volts=
in the future at which point I could just remove the voltage doubler. I'm=
going to try the truck at 72 volts for now and see how I like it. Second,=
this option feels like a complete solution, where the others feel like the=
y are just adequate. The main problem is that I don't know what it takes to=
build a voltage doubler, although I'm under the impression that they are f=
airly simple circuits, but perhaps they are a bit trickier at these current=
levels. If the DC/DC is good for 40 or 50 amps that means the voltage dou=
bler would have to be built for twice that.
=
Any comments appreciated. Or if you know of a good DC/DC that that operate=
s well in the 60 - 90 volt range and that is easy to work with and readily =
available let me know.
=
thanks
damon
_________________________________________________________________
Help yourself to FREE treats served up daily at the Messenger Caf=E9. Stop =
by today.
http://www.cafemessenger.com/info/info_sweetstuff2.html?ocid=3DTXT_TAGLM_Oc=
tWLtagline
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
xt week, so it's going to be time to really get busy and finally get my lit=
tle Datsun truck on the road. I could use some input on the 12 volt system.
=
The first option I am considering is building a 14 volt house battery. Sin=
ce I am using BB600 cells this would be simple and give me up to 40 ahrs of=
power. I have lights, a couple of contatctors, a heater blower, a blower =
for cooling my motor and windshield wipers to potentially run off this. I =
think a fully charged battery should give me a full hour of run time even i=
n a worst case scenario, and since these are NiCads they should hold a nice=
steady voltage. The downside to this approach is that I could potentially=
run this battery down and find myself stuck, of course with a set of jumpe=
r cables I could jump my house battery from my main pack and be on my way I=
suppose.
=
The next option would be to add a small DC/DC converter. I even have one t=
hat is rated 36 - 72 volts and 17 amps. It is the twin to the one I use on=
my motorcycle. I could set the voltage to a level that would kick in if t=
he house battery begins to sag under load. The problem with the one I alre=
ady have is that I am planning on running my main pack at a bit over 72 vol=
ts nominal (66 1.2 volt cells), and I'm not sure how the DC/DC will like th=
is.
=
The last option I have been considering is a voltage doubler to feed a regu=
lar proven EV style DC/DC like an IOTA. This has a few advantages that I l=
ike. First, there is a good chance that this truck may end up at 144 volts=
in the future at which point I could just remove the voltage doubler. I'm=
going to try the truck at 72 volts for now and see how I like it. Second,=
this option feels like a complete solution, where the others feel like the=
y are just adequate. The main problem is that I don't know what it takes to=
build a voltage doubler, although I'm under the impression that they are f=
airly simple circuits, but perhaps they are a bit trickier at these current=
levels. If the DC/DC is good for 40 or 50 amps that means the voltage dou=
bler would have to be built for twice that.
=
Any comments appreciated. Or if you know of a good DC/DC that that operate=
s well in the 60 - 90 volt range and that is easy to work with and readily =
available let me know.
=
thanks
damon
_________________________________________________________________
Help yourself to FREE treats served up daily at the Messenger Caf=E9. Stop =
by today.
http://www.cafemessenger.com/info/info_sweetstuff2.html?ocid=3DTXT_TAGLM_Oc=
tWLtagline
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
