US 12,313,684 B2
High-voltage system test measurement systems and methods
Binh Thanh Nguyen, Union City, CA (US); Joshua David Freeman, Livermore, CA (US); Matt David Ruth, Castro Valley, CA (US); and Stephan Wayne Finley, Castro Valley, CA (US)
Assigned to Gillig LLC, Livermore, CA (US)
Filed by Binh Thanh Nguyen, Union City, CA (US); Joshua David Freeman, Livermore, CA (US); Matt David Ruth, Castro Valley, CA (US); and Stephan Wayne Finley, Castro Valley, CA (US)
Filed on Jun. 23, 2020, as Appl. No. 16/909,432.
Claims priority of provisional application 62/870,010, filed on Jul. 2, 2019.
Claims priority of provisional application 62/869,447, filed on Jul. 1, 2019.
Prior Publication US 2021/0003635 A1, Jan. 7, 2021
Int. Cl. G01R 31/327 (2006.01); B60L 58/10 (2019.01); G01R 31/52 (2020.01)
CPC G01R 31/3275 (2013.01) [G01R 31/52 (2020.01); B60L 58/10 (2019.02); B60L 2200/18 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A high-voltage electrical system, comprising:
a high voltage electric power source, the high voltage electric power source comprising one or more batteries together capable of storing at least 200 kWh of energy;
an electrical load;
electrical circuitry including the electric power source and the electrical load so that the electric power source applies high voltage power to the electrical load;
at least one switch disposed in the electrical circuitry upstream from the electrical load with respect to the electric power source so that the at least one switch, in a first switch state, conducts electric current within the electrical circuitry through the at least one switch and, in a second switch state, opens at least part of the electrical circuitry so that the high voltage power is not applied to at least part of the electrical load;
a test port comprising
a first electrical terminal disposed within an IP rated connector configured to receive a first test lead of a test instrument, the first electrical terminal connected to a first position, between the at least one switch and the electrical load, in a portion of the electrical circuitry at which high voltage exists when the at least one switch is in the first switch state, and
a second electrical terminal disposed within an IP rated connector that is offset from the connector of the first electrical terminal and configured to receive a second test lead of the test instrument, the second electrical terminal connected to a second position, between the at least one switch and the electrical load, in the portion of the electrical circuitry,
wherein application of a predetermined resistance via the test instrument electrically between the first said test lead received by the first electrical terminal and the second said test lead received by the second electrical terminal produces a voltage drop across the predetermined resistance that is in a voltage drop first state when the at least one switch is in its first switch state and is in a voltage drop second state when the at least one switch is in its second switch state, wherein the voltage drop first state is different from the voltage drop second state;
a first at least one electrical component electrically disposed between the first electrical terminal and the first position in the portion of the electrical circuitry so that the first at least one electrical component passes at most a low level of electric current from the first position to the first electrical terminal when a short circuit between the first electrical terminal and the portion of the electrical circuitry completes an electric circuit that includes the first at least one electrical component and the electric power source;
a second at least one electrical component electrically disposed between the second electrical terminal and the second position in the portion of the electrical circuitry so that the second at least one electrical component passes at most a low level of electric current from the second position to the second electrical terminal when a short circuit between the second electrical terminal and the portion of the electrical circuitry completes an electric circuit that includes the second at least one electrical component and the electric power source; and
a junction box disposed between the high-voltage electrical power source and the electrical load and having a housing that encloses the first position, the second position, the first at least one electrical component, and the second at least one electrical component, wherein the test port is disposed in the housing.