Just an other aluminium truck camper project

#16
so in the meantime I put in the inner walls - Forex (a PVC hard foam), some wood, water tank (19 gal) and started with the wiring

IMG_1637 (1).jpg

IMG_1656 (1).jpg

Tech cabinet

IMG_1658 (1).jpg

IMG_1660 (1).jpg

IMG_1663.jpg

bye Werner
 
#20
Not much to show - lots of nitty gritty detail work, wiring the electro cabinet and using the bad weather to do some soldering on the battery management system and programming. The necessary balancing for the LiFeYPo4 cells and the protection against under voltage is all controlled by an Arduino Nano board and shown on display with the voltage of all 4 single cells, the total voltage, the actual balancing voltage (as I use different charging sources the software detects the source and goes for the right balancing threshold). To protect against under voltage the software checks each cell for the lowest voltage, i programmed two levels - at 2.9V the fridge is cut off and the rest (lights, USB outlets etc.) follows under 2.6V.

Arduino display 01.jpg

bye Werner
 
#22
due to much overtime @job not much done on the camper - finished the software for the Arduino, soldered the circuit boards and tested the setup, balancing works very well. To be flexible regarding the balancing voltage I added a variable resistor and modified the software so I can now easy adjust the balancing voltage between 3-4 Volt with a screwdriver.

Some more pictures:

LiFeYPO4 Block, 4 cells 100A/h

IMG_1764.jpg

Balancer board

IMG_1761.jpg

Arduino board

IMG_1763.jpg

Electro cabinet

IMG_1765.jpg
 
#24
today we got the camper out of the garage and put it with the help of my neighbor and his tractor onto the Ranger to bring it up into the barn for further build. I had to free the garage before first snow for our daily drivers.

IMG_1777.jpg

IMG_1789.jpg

IMG_1788.jpg

looks like it fit perfect onto the Ranger
 
#27
just some little work on the electro cabinet, did some CAD/CAM and milled the panel and a stainless steel piece for the switches:




IMG_1807.jpg

milling and engraving the switch panel

IMG_1808.jpg

result

IMG_1809.jpg

final panel with solar/batterie computer, water tank level display, balancer display, switches and USB/12V outlet and voltmeter

to all expo members a merry Christmas and a good 2018

Werner