A better alternator delete - Page 8 - Fuel Economy, Hypermiling, EcoModding News and Forum

Daox · 11-26-2019, 09:55 AM

Quote:

Originally Posted by oil pan 4

Why not run the blower power straight off the battery?

I'm not seeing how this changes anything? All the accessories run off the battery.

Quote:

There's also 7 cell lead acid race batteries.
That 7th cell keeps voltage under load close to what you get with a running alternator. But it needs a specific charger.

Last time I looked into that, I recall the prices being way higher than what this project will cost.

teoman · 11-26-2019, 10:00 AM

Some blower electronics were terribly inefficient. A direct connection may help.

Daox · 11-26-2019, 10:01 AM

Quote:

Originally Posted by teoman

Put a cardboard box over your printer. That will provide thermal stability to stop warping of the parts.

If you have delamination you may need to up the extrusion temperature.

Thanks for the tips. I actually just finished printing the bottom plate this morning. I lowered the extrusion temperature as much as I was comfortable with, raised the bed temperature a good amount, and used a 10mm brim on it. It looks like it came out pretty good.

Quote:

Originally Posted by mpg_numbers_guy

Time to get LED headlights!

I have certainly thought about it. The LEDs I have used in the past have worked okayish. Decent light output, low power use, good low beam, but horrible high beam pattern.

teoman · 11-26-2019, 10:03 AM

I am still a little sad that we did not go the connector route with this project.

And use an arduino to monitor the packs.

Daox · 11-26-2019, 01:12 PM

I still have to read up on how the BMS works. If it's not too hard there may be a V2.0. I still have a bunch of cells left over...

Daox · 11-27-2019, 08:41 PM

I got the top and bottom plate printed up. Assembly is definitely not super easy, but it did go together.

The next step is to cut the bus bars and assemble it with the threaded rod.

teoman · 11-27-2019, 11:05 PM

Adding + and - sings on the print and Voltage info on the print would have been a nice touch.

I suppose you could write it with a permanent marker.

Daox · 11-30-2019, 04:55 PM

I got the latest and I think last trinket for this project, a low voltage disconnect. This circuit monitors the battery pack's voltage and once it hits a programmable set point it disconnects the pack from the load automatically. This will ensure the pack never gets too far discharged and prolongs its life.