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| Thread ID: 150565 | 2022-04-01 03:31:00 | DIY UPS with Lithium batteries | EMC2 (17779) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1485275 | 2022-04-01 03:31:00 | Hi everyone, I'm looking to build my own UPS for my PC and maybe as a travel power pack for portable VR. I am looking to use some 21700 batteries and plan to follow this guide here: www.youtube.com So far I am pretty early on in the process, but am just investigating suppliers here all the parts (hate waiting for shipping lol). I got a good price from these guys for 50 * samsung 21700 cells 18650batteries.nz Is this too ambitious for someone with little experience in this area? Will I blow up my house. Looking forward to hearing from anyone that has built something like this :D Cheers |
EMC2 (17779) | ||
| 1485276 | 2022-04-01 06:14:00 | If you have the skills and follow all instructions to the Letter -- Who knows. Maybe the Disclaimer says volumes: Disclaimer: ------------------ I cannot be held responsible for any loss of property, damage, or loss of life if it comes to that. This tutorial was written for those who have knowledge on rechargeable lithium ion technology. Please do not attempt this if you are novice. Stay Safe. The full project documentation in the Video link looks helpful. |
wainuitech (129) | ||
| 1485277 | 2022-04-01 09:07:00 | Honestly I don't think you can build a UPS cheaper or better than you can just buy one. You need a charger, battery, and inverter and that won't even get you a proper UPS just a power supply that approximates the same job. It'd need to be a pure sinewave inverter for PC use as well. Not cheap components. To make a real UPS you need a way to let the mains AC pass through under normal operation and a way to switch in the battery powered inverter fast enough to appear seamless. That's what a UPS does. If you want to do it as a project for fun though go for it :) For me I would use LifePO4 batteries, a bit bigger but they are a lot safer to use and you can even use them as a straight drop in replacement for lead acid 12V batteries. A 4S LifePO4 battery with a BMS will charge to 13.6V quite safely. A proper charger is better long term but a lead acid charger will work. 4 of these www.trademe.co.nz and a suitable BMS for example |
dugimodo (138) | ||
| 1485278 | 2022-04-02 00:09:00 | For me I would use LifePO4 batteries, a bit bigger but they are a lot safer to use and you can even use them as a straight drop in replacement for lead acid 12V batteries. A 4S LifePO4 battery with a BMS will charge to 13.6V quite safely. A proper charger is better long term but a lead acid charger will work. 4 of these www.trademe.co.nz and a suitable BMS for example yes, i have just bought a 12.8v 7ah lith battery that can replace the standard lead acids. however it does have a maximum output current. you can't use them on things that will draw a lot which makes them a bit dubious for things like UPS. you would have to make sure you get a bigger model thats within its current range. the reason i got it is because i use it for a few things including backup lighting in power cuts. my 2 year old lead acid battery has dried up and failed. |
tweak'e (69) | ||
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