Wisk Aero LLC

Jing Xue

Geoffrey Alan Long

Khoichi Lawrence Takayama

A system is disclosed to detect failure of a diode that is connected in series with a battery and a contactor or other switch configured to connect the battery to a load when the contactor or other switch is in a closed position and to isolate the battery from the load when the contactor or other switch is in an open position. In various embodiments, the system includes a high value resistor connected between the anode terminal of the diode and ground, the connection to the anode terminal being on a load side of the contactor or other switch; and a voltage meter configured to measure a voltage across the high value resistor at least during a test in which a voltage is applied to a bus associated with the load while the contactor or other switch is in the open position.

Battery diode fault monitoring

Techniques to monitor a ground network are disclosed. In various embodiments, a test current is supplied to a ground connection from an electronic subsystem to a star point of a ground network. A voltage meter is used to read the potential difference between the ground connection and the voltage reference while the test current is being supplied to the ground connection to the star point of the ground network. The read potential difference is used to compute a computed resistance associated with the ground connection to the star point of the ground network. The computed resistance is used to determine that a detection criterion associated with the health of the ground connection to the star point of the ground network has been satisfied.

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San Jose, CA, United States of America

Jing Xue