Sentinel New Zealand 
They have a module that does volts and impedance and a current interface

Steve

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Gary Neal
Sent: 16 November 2006 13:59
To: piclist@mit.edu
Subject: [EE]: Battery monitor/management system for Li-ion batteries?

Group,

I am involved with a collegiate team that is developing a hybrid electric 
vehicle.  As part of that effort, we are using an 300V dc lithium ion 
battery pack that contains 80 cells in series.

We are investigating new options for monitoring the voltage and temperature 
of each individual cell.  Ideally, we would like to have this system 
communicate over CAN to the vehicle controller which would then make 
decisions about the health of the battery pack.

Looking long term, we would also like the system to have the ability to 
charge/discharge individual cells to balance the entire pack.  That's not 
necessary at this point, but would be nice.

Does anyone know of any commercial units that might accomplish this task?

If not, anyone have any good insight on designing one?  Obviously, 
isolation of this system from the rest of the vehicle electronics is a must.

Thanks,

Gary



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