BMW 3.0 CSE

When we showed Paul's car off at the La Jolla Independent BMW owners gathering in June, 2021 I realized that no one knew what they were looking at.  Electric conversions are still relatively rare and when we popped the hood to show the big aluminum "oven" that holds most of the Tesla batteries people asked questions like "is there a motor in there"?

Hooking up the first 10 Tesla battery modules for traction (High Voltage), monitoring, charging, and cooling is a big job.  As mentioned in the " We're Monitoring You " post, each set of cells needs to be monitored by the BMS to balance the cells and prevent overcharging.  They also need to be watched for temperature when driving via the built-in thermistors and cooled via the built-in cooling passages. I started with the high-voltage side of things because that dictates where everything sits in the battery box.  There are a number of ways to connect the batteries but I came up with one that terminates both the negative and positive terminals in the "BMS Void" area of the box and can be connected with solid copper busbars in every junction except one.