I've been a lurker on here for a while so I decided to contribute a project I've been working on for people to make at home. The basis for the project was the mobility of having a battery pack to inflate a mattress, jump a car, run a fridge remotely, run lights remotely, etc. After reading the advantages of LiFePO4 and dissolving the logic of buying something already on the market to save a couple bucks, I decided to build my own. I referenced to this thread here on EXPO to the design and construction. It's still a work in progress but has working great so far (I need to add the fuse, install the large 50A connector, and make the car charger). I am open to suggestions or fixes of the design from any pro's out there. I will make the 3D model of the parts available on my website so if anyone wants to print one out, they are more than welcome to use/modify the models.
Link to Website
3D Model:
Total investment so far = $265
List of Parts:
12.8V 30A BMS ~ $42
12.8V 20ah LiFePO4 Battery Pack ~ $133
Harbor Freight Apache 1800 sealed box (or equivalent) ~$15
Marine Grade Dual USB Socket and Cigarette Lighter Power Socket ~$12
Carling Switch ~$1 (Scrap Yard find)
DC 0-30V LED 3-Digital Display Voltage Voltmeter Panel ~$2
Tenergy 12.8V/14.6V (4S) 10A LiFePO4 Battery Charger ~$45
DC-DC Buck Converter (Adjustable) ~$15
Wiring Diagram:
Link to Website
3D Model:
Total investment so far = $265
List of Parts:
12.8V 30A BMS ~ $42
12.8V 20ah LiFePO4 Battery Pack ~ $133
Harbor Freight Apache 1800 sealed box (or equivalent) ~$15
Marine Grade Dual USB Socket and Cigarette Lighter Power Socket ~$12
Carling Switch ~$1 (Scrap Yard find)
DC 0-30V LED 3-Digital Display Voltage Voltmeter Panel ~$2
Tenergy 12.8V/14.6V (4S) 10A LiFePO4 Battery Charger ~$45
DC-DC Buck Converter (Adjustable) ~$15
Wiring Diagram:
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