3 D printed 12 volt battery box part 3

313 views · Published 2 February 2018 · 5:25 · Indexed 21 September 2026

Channel: Not rocket science · 2018 · Science & Technology

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Do this at your own risk. This is not a tutorial. Lithium ion batteries can explode or catch fire if overcharged or over discharged.
   This is part 3 of my small low drain 12 volt 3S 18650 battery box.  It can output 2 amps at 12 volt. Power can be accessed through the jack at the front. It can be charged with a dedicated 12.6v charger. Balance charging can be done through a hobby charger. The 12 volt power bank can also be wirelessly charged if a charging pad is available. The charging boost from 5v to 12.6v is done through a constant voltage, constant current boost buck converter.
 The battery box is fused and the EBL 18650s are supposed to be protected cells.  Battery voltage is displayed on the front and the batteries should be recharged when voltage drops below 10v.
  The boost converter can be purchased on eBay for about $5, the wireless charging attachment can also be found on eBay for a few dollars.  
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