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Battery box from Husky toolbox

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#1 urassner

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Posted 05 September 2013 - 06:48 PM

I finally put together my battery box. I settled on a 22 inch Husky toolbox. It was a little larger than I wanted, but seemed like the best compromise. At the moment it houses one 36 Ah Lithium iron phosphate battery, which is wonderful. It is pricey, but only weights just shy of 5 lbs and can be recharged up to 2000 times. Very little voltage drop until the end. To judge how much power I might have left, I went for a "Watts up" which shows voltage, current power consumption and total used energy (in Ah and other units - one of the attached pictures shows my phone plugged into the USB port).
I put in a main power switch, a separate voltmeter (got that before I got the Wattsup), 2 lighter sockets (each attached to a resettable 10A fuse) and one double USB port to keep my iPad/phone alive.
All ports and switches are in a recessed compartment in the lid. There is enough room in the box to easily add two more batteries (not that I want to spend that much money - but who knows in the future).
I wanted this to be multifunctional, not only for astronomy.

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#2 urassner

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Posted 05 September 2013 - 06:49 PM

Picture 2 with innards

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#3 urassner

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Posted 05 September 2013 - 06:50 PM

Battery attached with velcro for cushioning and to prevent it from sliding around.

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#4 urassner

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Posted 05 September 2013 - 06:52 PM

Iphone plugged in. Wattsup shows energy consumption. I put the USB port on a separate switch, so it is only on when needed.

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#5 BRCoz

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Posted 05 September 2013 - 08:43 PM

Very nice.

#6 Gastrol

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Posted 05 September 2013 - 09:14 PM

Hey, very nice job with the acc ports!!

I enclosed my 35Ah wheelchair battery in a soft, padded camera bag.

#7 Midnight Dan

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Posted 06 September 2013 - 06:19 AM

Nice! :waytogo: Great to have that little tray inside for storing cables.

-Dan

#8 urassner

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Posted 06 September 2013 - 06:56 AM

Thanks for your kind comments. I am very curious to see how much power my mount will actually use.

#9 Lentini

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Posted 09 September 2013 - 10:05 PM

Very nice! Any chance you can post a parts list?

#10 urassner

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Posted 13 September 2013 - 09:07 AM

Sorry it took me a few days. Here is the list:
I bought most of the electronics/switches from Amazon
- "Watt's Up" RC Watt Meter & Power Analyzer WU100 Version 2
- Sierra International CB41210 10 Amp Marine Resettable Circuit Breaker
-2 Blue Sea 1011 12V DC Socket
- Blue Sea Dual USB Charger Socket - 2 USB Ports w/Watertight Cap
- Daystar KU80014 20 Amp Red Light Rocker Switch Kit
- SMAKN 2 Wire 4 Digits Dc 4.0-30.00v LED Panel Digital Display Voltage Meter Voltmeter (red)
by SMAKN
- Amico 5 x Momentary SPST NO Red Round Cap Push Button Switch AC 6A/125V 3A/250V
- Shorai LFX36L3-BS12 Extreme Rate Lithium Iron Powersports Battery

From home depot a Husky 22 inch Toolbox (a little larger than I wanted, but the best they had for my purpose. I wanted a separate compartment in the lid for the switches and sockets)

From radio shack I bought
a red 12 LED to illuminate the Wattsup (I got that after I had put in the other voltmeter - so both are really not necessary)
a on off switch push button style for the usb port
a bunch of connectors and wire from radio shack (they are not the cheapest, but I found it easier to look at the different connectors and choose, what might work best)

I really like the wattsup, even though it is pricy at about $50. Since it keeps track of the energy usage, it is easy to see how much power you have left. The only thing to keep in mind is that it resets when you turn the power off (the way I wired it. I did not want it on all the time), so you have to keep track if you use it over several nights.






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