DIY power station part 3 - 12V LiFePo4 GoKWh battery
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- Опубліковано 29 вер 2024
- A very kind viewer offered a 12V LiFePo4 battery to use instead of the 48V. I'm still going to solder on the BMS for the 48V, but I think it'll be easier to use a 12V inverter etc on the 12V battery.
gokwh.com/12v-...
Protection OFF is a good thing, it means NONE of the safeties have tripped. As for the balancing, that usually doesn't kick in until the cells are near full just to balance everything out at the end. Don't panic.
Great vid, David. Did not expect the pouch cells either. On a side note, thank you for your wonderful positivity and good spirit. I found your channel about a year ago. I was having the worst day ever, and heard your "Helllllooooo!" and almost fell out on the floor laughing. Cheers me up every single time! Keep up the great work! 👍
Most of these cheaper lifepo4 batteries all use the jbd bms in them, they are really good bms for the money, but a better app to use is the overkill solar app, has alot more customisation to play about with settings, I use the 200a version in my self build battery,
Sorry you got me Angry. Im a Small engines mech for 30 years your getting excited by captive nuts , Brought on flashbacks of the 100s's of cowlings ive had to smash due to seized bolts spinning the nut then once they spin you cant even drill the bloody things out. Give me seperate nuts and bolts any day. Cheers love your vids by the way
You can use hot glue + a pen as a stick to pull out these plugs above the screws. it leaves no marks at all and works really well, in case you need to refund the battery because they got trash cells. the bms is usually trash and needs to be replaced by at least a jk bms. my cells were disbalanced quite much, didn't had no compression at all (besides packaging tape) and the bms shut down charging above 3.75V cells voltage, which is waaaay too high. Above 3.55V you don't gain any capacity worth mentioning, maybe 2Ah, but they swell more. Because my cells were disbalanced quite a bit it disabled the charge at 14.2V and have swollen two of my cells. besides all that the balance current with the shipped bms was only 40mA which is pretty much useless. jk bms'es are affortable, have 1A active balance, bt connection and work quite well. The shipped cells might be usefull and good, but I wouldn't trust the bms at all
Nice to see a lifepo stripped. Keep up the dangerous work lol 👍
Battery looks interesting and surprisingly good value at around $300 (I didn't see a UK supplier?). However, the max discharge current is specified as 100A, which is a bit limiting if you wanted to use it to drive an inverter for example as it limits you to about 1kW.
It seems to be an issue with most of the built up LiFePO4 12v batteries however
I have a slightly more DIY (wouldn't you guess 🤣) 12v pack made from 4 x BYD 125Ah LiFePO4 cells (left over from my EV Conversion) which have a discharge capacity of 500A continuous & seem to peak at about 800A which is more useful IMHO
Why am I only seeing part 3 now I wanna go to sleep but have to watch 1 and 2 first
Try getting the plastic plugs out by blowing air in. That's how we remove the plastic plugs that are fitted on NSK rails 😉
Interesting. Dewalt hand power tools use pouch cells in their new style Power Stack batteries
At least with the 12v battery, you could wire it up to a 12v UPS, so you have an inverter, a charger and all the wiring all in one box, you just have to make sure to find a decent one with pure sine output, though of course the higher powered UPSes use 24 or 48v battery packs, so a 12v one could be limited I suppose...
I'm not sure if I've imagined them or not but I think there might be an inverter with a built in UPS function.
@@DavidMcLuckie They do exist, most often used on boats or something, so you can switch between shore power and battery without disruption, probably cost a heck of a lot of money though compared to a UPS on ebay with dead batteries that can be re-powered with bigger and longer-lasting ones, and given APC UPSes can have (or even come with if you're lucky) network management cards, they can be remotely managed too... :)
Yes lots of variety