Recent content by Maxxim

An update about this battery. I has been in use for a whole fishing season(for the bow mounted electric motor) and I havn't had any issues with it. Have been workong great. It's a very powerfull pack and has plenty of capacity for this use. Can easily use it for 2-3 fishing trips without...

The battery is ready for testing. Usage will be in a boat as a battery for a bow mounted trolling motor. Added heating pads underneath the cells, and between 0.5mm stainless plate, but didn't fit the thermostat yet. Will see if I even need heating at all..? Used 8mm foam on the walls and under...

Very nice! Didn't thought about printing a case, even that I have a 3D printer. Made my own case out of steel which is quite heavy. Outch, that wound seems painful, what happend?

So have you done the capacity test yet? These cells looks just like mine: https://diysolarforum.com/threads/second-small-battery-build.20649/ Don't know the brand of mine, but sure looks the same, and the packaging is similar. It will take some time to top balance all cells in parallel, no...

This is mybe not so interesting compared to big solar system projects here, but I'll keep on coming with small updates anyway ?? Made the lid out of 6mm styrene-acrylonitrile plastic sheet and machined power posts out of aluminium. Still have to find a very thin seal to seal up the lid.

Got the box from the powder coating. Luckily the battery cells fitted perfectly. Did't test fit them before I took it to coating. Still need to make threads in the lid holes and a plastic lid with power terminals. Will see how I fit the BMS.. there is a bracket in the box with threaded holes...

Thank you. Well, everything is possible to build, but would need some time and effort. Luckily I'm working in a place that has availability to laser cutting. I'm not so used to welding these days. Twenty years back I was welding type every day. But now only here and then... Mig/Mag welding is...

Sand blasted the box and it did go for powder coating.

Seems to be a pain to find a proper box for these batteries, that isn't too big. Couldn't find anything at a resonable price. So I decided to DIY. Welded out of 2 and 3mm metal sheet. Will ad a non conductive cover with terminals.

Made the capacity test last night with 14-15A load. Seems to be very nice batteries. No big drift in voltages and total capacity of the pack was very good 122,47Ah. Not bad at all, very happy. Was able to test my new Victron 25A charger. Quite nice product. Speeds up the charge quite a lot...

Seems that the link is wrong in the first post.. here is the right one: https://a.aliexpress.com/_mK2LRQ3 The total size of the pack(4x cell) is quite compact, 195x175x180mm, quite a lot smaller than a same Ah size lead acid battery. Doing the top balance atm...

Usually bigger goods are shipped in big batches in conteiners overseas. Tracking isn't working that time. Often it takes about two months to arrive to the warehouse, then it's registered and shows up on tracking, and after that it usually arrives in few days. But at some point from last summer...

76 day ago I ordered a batch of LiFePo4 cells from Aliexpress Genuine Battery Store: https//a.aliexpress.com/_mOjK28Ln and yesturday I recieved them finally. They where shipped from China, and about 70 days later they arrived to Poland and showed up on UPS tracking. It took only a few days from...

Thanks. Yes, that can be a problem. Mostly I will charge the batteries every time on land before I go fishing, as the boat sits on a trailer. The DC-DC converter has a on/off switch connector so I will use it only if I need more li-ion battery power when I am on water. Also total power...

Seems to be unavailable atm from the seller I bought it from, but this is the same box: € 40,26 | DIY kit battery box 12V 24V 48V 60ah 80ah 100ah 120ah li ion lifepo4 LTO lithium diy battery waterproof plastic empty case https://a.aliexpress.com/_mLYOenr