US 12,405,311 B2
Isolation monitoring
Victor Marten, Flushing, NY (US); Nicolas Clauvelin, New York, NY (US); and Ioannis Milios, New York, NY (US)
Assigned to Sensata Technologies, Inc., Attleboro, MA (US)
Appl. No. 18/550,455
Filed by Sensata Technologies, Inc., Attleboro, MA (US)
PCT Filed May 22, 2023, PCT No. PCT/IB2023/055260
§ 371(c)(1), (2) Date Sep. 13, 2023,
PCT Pub. No. WO2023/228057, PCT Pub. Date Nov. 30, 2023.
Claims priority of provisional application 63/365,251, filed on May 24, 2022.
Prior Publication US 2024/0393401 A1, Nov. 28, 2024
Int. Cl. G01R 31/3835 (2019.01); H01M 10/42 (2006.01)
CPC G01R 31/3835 (2019.01) [H01M 10/4228 (2013.01); H01M 10/4285 (2013.01); H01M 2250/20 (2013.01)] 35 Claims
OG exemplary drawing
 
15. A method for use with respect to a chassis and for use with respect to first and second battery connection positions, each of which is not tied to the chassis, and for use with apparatus for use with respect to the chassis and with respect to the first and second battery connection positions, the apparatus comprising first and second respective resistor strings, each having a first end and a second end, the first resistor string connected at its first end to the first battery connection position, the second resistor string connected at its first end to the second battery connection position, the first and second resistor strings each connected at its second end to the chassis; each of the first and second resistor strings further comprising a switch connected across part of the resistor string; the apparatus further comprising first and second voltage measurement apparatus, each of the first and second voltage measurement apparatus having first and second voltage measurement terminals, the first voltage measurement apparatus connected to the first resistor string at two non-identical points along the first resistor string, the second voltage measurement apparatus connected to the second resistor string at two non-identical points along the second resistor string; the method comprising the steps of:
measuring the voltage at the first measurement apparatus with the switch of the first resistor string open;
measuring the voltage at the first measurement apparatus with the switch of the first resistor string closed;
measuring the voltage at the second measurement apparatus with the switch of the second resistor string open;
measuring the voltage at the second measurement apparatus with the switch of the second resistor string closed;
carrying out an analysis based upon the measured voltages to arrive at an estimate of any isolation failure between the first battery connection position and the chassis;
carrying out an analysis based upon the measured voltages to arrive at an estimate of any isolation failure between the second battery connection position and the chassis; and
annunciating to a human user in the event of an estimated isolation failure thereof.