US 12,325,311 B2
Active discharge device and method
Yamna Bakhali, Cergy (FR)
Assigned to Valeo Siemens eAutomotive France SAS, Erlangen (DE)
Appl. No. 17/782,755
Filed by Valeo Siemens eAutomotive France, Cergy (FR)
PCT Filed Dec. 4, 2020, PCT No. PCT/EP2020/084751
§ 371(c)(1), (2) Date Jun. 6, 2022,
PCT Pub. No. WO2021/110980, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. FR1913894 (FR), filed on Dec. 6, 2019.
Prior Publication US 2023/0001796 A1, Jan. 5, 2023
Int. Cl. B60L 3/04 (2006.01); B60L 3/00 (2019.01); G01K 7/22 (2006.01); H02H 9/02 (2006.01); H02M 1/32 (2007.01)
CPC B60L 3/0046 (2013.01) [B60L 3/04 (2013.01); G01K 7/22 (2013.01); H02H 9/026 (2013.01); H02M 1/322 (2021.05)] 10 Claims
OG exemplary drawing
 
1. A device for actively discharging an electrical energy storage device, comprising:
a branch comprising:
first and second ends configured to be connected respectively to positive and negative terminals of the electrical energy storage device, and
between the two ends, a thermistor having a resistance that increases with a temperature of the thermistor and a switch to receive a control signal to change from an open state to a closed state, the thermistor and the switch being connected to one another so that, when the switch is closed, a discharge current enters through the first end, flows through the thermistor and the switch one after the other, and emerges through the second end; and
a device for controlling the switch;
wherein the control device is connected to the switch so as to provide the control signal independently of the resistance of the thermistor, and
wherein the resistance of the thermistor at 25° C. is at least 10 times higher than a resistance of the switch in the closed state.