I have been working on my first battery project beyond the small power packs with a couple cells.
When I started I knew I wanted to put it all in some kind of plastic storage container. I looked around and found this keeter tool chest and knew it would be an insanely cool container for this project because the top is split in halves on drawer slides.
I'm going for modularity and standardization on the battery packs. 7s10p packs with the cheap 20A 7s common port bms's you find all over the place. I have a 1500watt pure sine inverter so to comfortably run it at full power I need 4 of my standard packs, but my container can fit 8 of these packs. If I only want to run the lower voltage items I only need one pack.
On the left hand sliding half I modified the inverter to fit and moved its displays and start switch onto the face of the container. On the right hand sliding half I'm building the controls and lower DC voltage outputs. 12v automotive, 2x usb qc 3.0 charging ports, a current/power/voltage display for the 100A shunt in line with the batteries, and eventually an arduino with a touch screen to control some custom charging functions based on maybe a modified boost converter with variable current output (if I can get that to work this part is TBD).
In the bottom I put the batteries using some 8020 extrusion to secure the batteries in sets of two and mounting the power bus to the top of the 8020 rail. I will also build in a charger to target around 700W peak charge power. 120V receptacle is mounted on the rear face of the box between the wheels. Also some cooling fans eventually...
Batteries are all recovered from modem batteries. Battery cables are #6awg DLO cable which I got for 1.13/ft USD. I know silicone is better to work with but its too expensive. In my view if it gets hot enough to need the 200C temp rating of the silicone wire I have done something wrong!
Lots of TBD, since I just kind of stare at it for a while to figure out what I want to do next, but its coming together!
When I started I knew I wanted to put it all in some kind of plastic storage container. I looked around and found this keeter tool chest and knew it would be an insanely cool container for this project because the top is split in halves on drawer slides.
I'm going for modularity and standardization on the battery packs. 7s10p packs with the cheap 20A 7s common port bms's you find all over the place. I have a 1500watt pure sine inverter so to comfortably run it at full power I need 4 of my standard packs, but my container can fit 8 of these packs. If I only want to run the lower voltage items I only need one pack.
On the left hand sliding half I modified the inverter to fit and moved its displays and start switch onto the face of the container. On the right hand sliding half I'm building the controls and lower DC voltage outputs. 12v automotive, 2x usb qc 3.0 charging ports, a current/power/voltage display for the 100A shunt in line with the batteries, and eventually an arduino with a touch screen to control some custom charging functions based on maybe a modified boost converter with variable current output (if I can get that to work this part is TBD).
In the bottom I put the batteries using some 8020 extrusion to secure the batteries in sets of two and mounting the power bus to the top of the 8020 rail. I will also build in a charger to target around 700W peak charge power. 120V receptacle is mounted on the rear face of the box between the wheels. Also some cooling fans eventually...
Batteries are all recovered from modem batteries. Battery cables are #6awg DLO cable which I got for 1.13/ft USD. I know silicone is better to work with but its too expensive. In my view if it gets hot enough to need the 200C temp rating of the silicone wire I have done something wrong!
Lots of TBD, since I just kind of stare at it for a while to figure out what I want to do next, but its coming together!
