![]() īalance charger to charge the battery pack. ĭeans T-type connectors (or XT60 connectors). The other necessary items are, of course, some 18650 lithium ion batteries, either an old laptop pack, or some like these. This is some of the best you can get for electronics. Next, some good quality solder like this. Avoid shorting them out, and be careful with the soldering iron and the tools.įor the tools, you need a soldering iron that's at least 30 watts, a digital multimeter, knife or wire strippers, side cutters or flush cutters. Lithium ion cells are pretty harmless, but you do need take some precautions. So, let’s get started! Links to the materials I used will be included. I was able to finish this project for around $20 USD. It also has a battery management system, that is necessary to protect the cells and keep it working right. This will give you a full charge voltage of 16.8 volts, a nominal 14.8 volts, and a discharged rating of 12 volts, and double the capacity of the series cells. I am building a 4S2P pack that has 4 cells in series, and 2 in parallel for 8 cells. You can also get them for cheap or free if you look around because pretty much every laptop has a lithium ion battery in it that people sometimes throw away because it’s “dead,” but may have lots of life left in it. High quality cells can withstand high discharge rates of over 20 amps, and work well in multiple cell configurations. They come in all shapes and sizes and capacities. Power tool batteries and electric vehicle batteries are made of lithium ion cells for that reason. Why use them? They are really great for projects because they have a higher voltage than other chemistries and hold a lot of energy, which means you can use fewer of them than if you were using nickle metal hydride or nickle cadmium cells (only 1.2 volts). ![]() They are sensitive to over discharging, over charging, and short circuits, and need special care to keep them from overheating, melting, or exploding. Lithium ion batteries are not like nickle metal hydride, lead acid, or nickle cadmium batteries. However, I learned on my first attempt that it wasn’t that easy. When I decided to build a battery pack out of 18650 lithium ion cells for a project, I took apart my old laptop battery, got the batteries out, soldered them together with metal strips into a battery pack. ![]() As a newbie, I had trouble finding good answers, so a lot of this was trial and error (and sparks). I have watched and read more than one tutorial or how-to guide on lithium ion batteries and battery packs, but I haven’t really seen one that gives you a lot of details. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |