Ebikes were some of the first consumer products to require large Li-ion batteries with dozens of individual battery cells.Ĭombining the high cost of these batteries with the DIY nature of many in the early ebike communities, DIY batteries were an inevitable result.
One of the first and largest of these communities revolved around electric bicycles. Large communities have sprung up all over the internet, showcasing the homemade battery projects that creative individuals have produced around the world.
In addition, sophisticated tools needed for battery pack building, such as spot welders that used to be $1,000+ specialty machines, have come down in price and size to the point where hobbyists can use them in their homes and garages. Today though, well-known companies such as Samsung, Panasonic, LG, Sanyo and Sony are producing dozens – if not hundreds – of different types of high quality battery cells that hobbyists are using to build battery packs for countless green energy projects. If you wanted something special, like high power or high-capacity battery cells, you had to tear apart power tool battery packs to harvest the specialty cells. Back then, battery cells were limited to a few commercially available options. I’ve personally been building my own battery packs since 2011, when I realized that the limited options available to tinkerers like me simply weren’t enough to fit the needs of my solar and EV projects. This has led to increasing opportunities for creative DIYers to shuck the bonds of traditional suppliers of expensive Li-ion battery packs and instead develop their own custom batteries for a variety of projects and applications. However, the last few years have seen an impressive upswing in availability of parts, tools and knowledge in the DIY lithium-ion battery pack space. For everything from home solar energy storage to garage-built electric bicycles, go-karts and full-size EVs, lithium-ion batteries were once one of the most limiting factors for hobbyist and makers. For DIY enthusiasts in the green energy community, homemade lithium-ion battery packs have long been a holy grail.
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