公开(公告)号：US20240369423A1

公开(公告)日：2024-11-07

申请号：US18311758

申请日：2023-05-03

Applicant: Infineon Technologies AG

Inventor： Christian Heiling ,  Heinrich Trebo ,  Mario Fuchs

IPC: G01K7/16

Abstract: In some examples, this disclosure describes a method of measuring a temperature-dependent voltage drop over a temperature sensitive resistor. The method may comprise delivering a reference voltage to the temperature sensitive resistor in a first instance of time; determining an auto-ranging current through the temperature sensitive resistor while the reference voltage is delivered to the temperature sensitive resistor; determining a temperature measurement current based on the auto-ranging current; delivering the temperature measurement current to the temperature sensitive resistor in a second instance of time, wherein the second instance of time is after the first instance of time; and measuring the temperature-dependent voltage drop over the temperature sensitive resistor while the temperature measurement current is delivered to the temperature sensitive resistor.

公开(公告)号：US20240186814A1

公开(公告)日：2024-06-06

申请号：US18061069

申请日：2022-12-02

Applicant: Infineon Technologies AG

Inventor： Christian Walther ,  Christian Heiling ,  Felix Weidner ,  Heinrich Trebo

IPC: H02J7/00 ,  G01R31/374 ,  G01R31/3835 ,  H01M10/42 ,  H01M10/48

CPC classification number: H02J7/007194 ,  G01R31/374 ,  G01R31/3835 ,  H01M10/4257 ,  H01M10/482 ,  H02J7/0013 ,  H01M2010/4271 ,  H01M2220/20

Abstract: Circuitry to measure individual battery cells of a battery pack and make corrections to account for environmental differences between battery cells and their associated measuring circuit. Several cell supervision circuits (CSCs) may be placed to monitor and manage one or more subsets of battery cells within the battery pack. The temperature of this battery pack is not distributed homogeneously which may cause a temperature gradient and affect the internal regulation circuit that generates a reference voltage used to determine the voltage of its supervised cell or cells and regulates power to the CSC components. This reference voltage is temperature dependent and thus a temperature mismatch of the CSCs. Based on the measurement circuit an external regulation terminal controls a pass device to share power between the pass device and the internal regulation circuit to manage the temperature of each CSC.