![]() Here's a small sampling of the information we can now use and display from the BMS: It allowed us to wire up the thermistors in each battery cell and has configurable CAN bus messages that it sends with a variety of battery information that we are able to use for better display of battery state, health, range, etc. The BMS offered the opportunity to address all that. Additionally, we were flying blind with regard to battery temperatures and had no insight into what was going on when charging. I evened out the variances by using an average over 1,000 readings (10 seconds, as the messages come in on the CAN bus at 100Hz) and it worked but wasn't perfect. This was less than ideal because instant voltage varies a lot with load and we had to guess at min and max voltages in order to calculate range. Prior to the BMS, we were estimating range based on instantaneous voltage from the Tesla Drive Unit Controller. That led to a lot of opportunities for software enhancements on the dash app. We've been focused on refining Paul's car so mine hasn't been getting much love but things are starting to gain momentum.Īs you've no doubt read, Paul has been driving his CSE and recently installed the Orion Battery Management System. Hard to believe that it's been so long since last post that this thread was pushed down to the 8th page.
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