Building Electric Bike Battery Pack

For everything from home solar energy storage to garage built electric bicycles.

Building electric bike battery pack. At current rates and pack sizes the average battery cost for a typical electric vehicle works out to about 7 350. That being said nca ncm in the 18650 format cells have a much better selection of choices and provide high power and long range in a small package that is affordable due to mass production. A 2s 4p battery pack series parallel bus plate. Please don t leave battery pack and charger on the wood material or carpet and unattended.

The top row of cells have their positive ends up and the bottom row of four has the negative ends up remember. Seen on the top row. Currently the builders dilemma happens when using a high amp cell 15a 30a. Common battery packs a 25a peak from 5p uses 0 15mm thickness for 5a per an 8a rated cell.

The entire sides of all 18650 cells are charged with the negative end. Plenty of people quote that the tesla ev uses 18650s which is true but the original ebike builders to use 18650s is the 14 000 optibike which has been using 18650 packs before any other ebike builder. That is why battery pack builders add the dark gray felt washers to the positive ends. In part one of this series i put out the best argument i could in order to explain why 18650 cells are the most popular for building an ebike battery pack for part 1 click here and we also wrote about what is inside 18650 cells to review that article click here if you haven t seen those articles yet i highly recommend you take a quick look at them before.

Building a battery pack out of 18650 batteries is not easy but it ain t hard with websites like ebike school we could never write an article like this so we teamed up with ebike school and ask them to share one of their articles about making proper 18650 packs. A 0 20mm thick nickel ribbon is common for the popular 10a rated high capacity cells like the lg mj1 samsung 35e and the panasonic ga. That s come down a lot 87 over the past decade according to bloombergnef. For diy enthusiasts in the green energy community homemade lithium ion battery packs have long been a holy grail.