US 11,940,335 B2
Battery temperature detection system and method
Ho Sang Jang, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 16/640,135
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Oct. 15, 2018, PCT No. PCT/KR2018/012110
§ 371(c)(1), (2) Date Feb. 19, 2020,
PCT Pub. No. WO2019/078559, PCT Pub. Date Apr. 25, 2019.
Claims priority of application No. 10-2017-0133982 (KR), filed on Oct. 16, 2017.
Prior Publication US 2021/0080332 A1, Mar. 18, 2021
Int. Cl. G01K 7/22 (2006.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01)
CPC G01K 7/22 (2013.01) [H01M 10/425 (2013.01); H01M 10/486 (2013.01); H01M 2010/4271 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A system for detecting a temperature of one or more batteries, the system comprising:
a plurality of temperature detecting sensors, which are connected with the one or more batteries, respectively, wherein a positive end of a first temperature detecting sensor is connected with a reference resistor and a positive end of each other temperature detecting sensor is connected to a negative end of a previous temperature detecting sensor; and
a battery management system (BMS) configured to:
apply a temperature detection voltage to the plurality of temperature detecting sensors,
calculate resistance values of the plurality of temperature detecting sensors based on a voltage value of the applied temperature detection voltage, and
detect a temperature of the one or more batteries connected with the plurality of temperature detecting sensors, respectively, based on the calculated resistance values,
wherein the plurality of temperature detecting sensors includes m temperature detecting sensors, and wherein the BMS is configured to:
measure the voltage values of the plurality of temperature detecting sensors, and
calculate the resistance values of the one or more temperature detecting sensors based on the measured voltage values of the temperature detection sensors and a plurality of equations, wherein each equation of the plurality of equations is associated with a respective nth temperature detecting sensor and equates a measured voltage value of the nth temperature detecting sensor and a calculation expression of the nth temperature detecting sensor, wherein the calculation expression includes a voltage output from a voltage source, a reference resistance, and a plurality of variables indicating resistances of related temperature detecting sensors.