Battery Interface Module
University: Ohio State University
Team Members: Aaron Bonnell-Kangas
TI Parts Used:
The Battery Interface Module is a 36-cell-capable lithium-ion battery monitoring circuit, designed to be installed on RW-2x, the second electric road racing motorcycle designed by Buckeye Current.
Buckeye Current is a student project team at the Ohio State University Center for Automotive Research, organized to design, build, and race electric motorcycles on road courses. The team’s first motorcycle, RW-1, holds the collegiate electric motorcycle speed record at 144 mph. The second vehicle, RW-2, took third place in the prestigious Isle of Man TT Zero in 2013, and its successor, RW-2x, is due to compete at the 2014 TT Zero in June 2014.
Beginning with RW-2, the team has developed custom battery management hardware and software for their large lithium battery packs. The nominal pack voltage of RW-2 and RW-2x is 462 V, and the pack on RW-2x is 110 series cells, presenting formidable challenges for battery management system (BMS) hardware design.
For a complete description of the project, read the Battery Interface Module report.
Project Report PDF- 3326.battery interface module report.pdf
- 36-cell lithium battery monitor with integrated measurement control, battery balancing, and CAN communications
- Measures cell voltages and temperatures
- 180 V maximum input voltage
- Integrated onboard battery balancing (~100 mA) controlled by onboard processor
- CAN TX/RX and control processor isolated from high-voltage circuit
- Automatic CAN termination
- Low-voltage side powered by 5-40V DC supply
- Networkable with other modules to coordinate large pack balancing
Battery Interface Module video
For the latest design files, schematics, and BOM, find the project on GitHub: Battery Interface Module