LiFePO4 BMS system

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jdh2550_1's picture
Last seen: 9 years 1 month ago
Joined: Tuesday, July 17, 2007 - 09:35
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LiFePO4 BMS system

For all those folks considering adding LiFePO4 to their rides. If you're buying loose cells with no BMS then check out this BMS over on endless-sphere:

It should be ready in DIY kit form soon at around $100 for a 16 cell (48V) system and can be easily expanded (or reduced) for other voltages. It has low voltage cut off on the discharge cycle and a charge management system (CMS) for the charging cycle. With this system you can use any charger that will put out >3.65V per cell - even just a power supply. The CMS takes care of ensuring each battery gets 100% charge.

Although they're designing this board for the LiFeBATT packs that they're going to sell to the e-bike world they've done a great job of making a board that can be used with any LiFePO4 cell and any charger. In fact, there was discussion about other chemistries - but I skipped those posts.

This is being done by Gary and Bob who are the guys that Don Harmon keeps mentioning in relationship to the LiFeBATT products for e-bikes.

This makes those Thundersky cells look more tempting...


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