|
helno posted:I’m probably in the market or a DIY battery. I built a 0.4 kWh pack out of 36 18650:s using a spot welder, nickel welding strips and 3D printed spacers/brackets for the cells. IMO spot welding is the way to go, soldering directly to cells is a bad idea and soldering wires to pre-welded tabs becomes a massive pain in the rear end really quickly. The problem with 18650s is that they haven't been really designed for any kind of cooling in mind and with a big pack and high discharge current both the cooling and the amount of hardware you need to connect everything together with enough current capacity starts to become an issue... The LiFeYPO4 (3.2V/100Ah) cells used in the video above are massively easier to build a big pack out of, I would definitely pay a bit more for those than try to build a thousand 18650 cell pack. Max discharge rate is just 3C though. I'm considering an putting an electric motor in a sailboat and will probably need 2 kW constant power for at least 2 hours, those cells look pretty good for that use.
|
#
¿
Dec 31, 2019 15:18
|
|
|
|
| # ¿ May 15, 2024 12:17 |
|