Electric Vehicle Current Sensing

Back to all technologies
Download as PDF
2017-ROY-67649
In electric vehicles, there are presently two solutions for current sensing. One approach uses a resistor as a current sensor, but this can cause problems given the sensor is invasive and has to be connected to a wire in series and the mechanical connection used to connect the sensor degrades reliability and safety. Another approach uses Hall sensors to measure the current noninvasively; however, it cannot measure small currents. Hall sensors require an invasive mechanical connection to measure small currents with high resolution. There is a need for a noninvasive current sensing method.

Researchers at Purdue University have developed a noninvasive current sensing module that can measure currents running through a wire with high precision, particularly for wires in electric and hybrid electric vehicles. This technology does not require a series connection, eliminating the side effects of degraded reliability and safety. Given it is noninvasive, it allows for easy installation and maintenance. Its high resolution allows for effective health condition monitoring and diagnosis of electric and hybrid electric vehicles. The module can transmit the measured current to any computing system through a variety of communication channels, including Bluetooth® and USB. In addition, the software development kit is compatible with popular automobile infotainment systems.

Advantages:
-Easy installation
-Effective electric and hybrid electric vehicle health condition monitoring and diagnosis
-Transmission of the measured current to any computing system
-Software compatible with popular automobile infotainment systems

Potential Applications:
-Electric and hybrid electric vehicles monitoring and diagnosis
-Battery monitoring
-Battery chargers
Dec 4, 2017
PCT-Patent
WO
(None)
(None)

Dec 2, 2016
Provisional-Patent
United States
(None)
(None)
Purdue Office of Technology Commercialization
1801 Newman Road
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org