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Old 05-09-2009, 08:36 AM   #1171 (permalink)
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Originally Posted by MPaulHolmes View Post
...So, maybe we can also do an open source cheap simplish BMS for lithium batteries down the road? Maybe one already exists? I don't know...
There's a very effective analog BMS on the streets. 2.1V cell-level low voltage sensing (for A123, PSI, and other cells)(can be changed to 2.5/2.6/2.7V for Thunder Sky users). Balancing on charge provided by either 1/4A, 1/2A, or 1A shunts. Charger current throttling and charge current shutoff when all cells are shunting.

Boards are break-away style that can handle from 4 to 24 cells on one board, and boards can be combined for larger packs.

Boards are available from: Products
Developed here: • View topic - Even Newer 4 to 24-cell Battery Management System (BMS)

Here's a 16-channel version at end of charge:

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