US 12,461,155 B2
Monitoring assembly for an electrical component, semiconductor switch assembly having a monitoring function, and energy system
Chrysanthos Tzivanopoulos, Grossbettlingen (DE); Johannes Swoboda, Stuttgart (DE); Mathis Wolf, Kornwestheim (DE); Patrick Kaupp, Stuttgart (DE); and Thomas Schaedlich, Kornwestheim (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/558,607
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Apr. 25, 2022, PCT No. PCT/EP2022/060800
§ 371(c)(1), (2) Date Nov. 2, 2023,
PCT Pub. No. WO2022/238093, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 10 2021 204 762.9 (DE), filed on May 11, 2021.
Prior Publication US 2024/0230761 A1, Jul. 11, 2024
Int. Cl. G01R 31/327 (2006.01); G01R 15/04 (2006.01); H03K 17/687 (2006.01)
CPC G01R 31/3277 (2013.01) [G01R 15/04 (2013.01); H03K 17/687 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A monitoring assembly for an electrical component comprising:
an electrical component (10, 15),
a first voltage divider (20) having a first resistor (R1) and a second resistor (R2),
a second voltage divider (25) having a third resistor (R3) and a fourth resistor (R4),
a first switch (S1),
a second switch (S2),
an input terminal (30),
an output terminal (32),
a reference potential terminal (34),
a measuring device (40), and
an analysis unit (50),
wherein
the electrical component (10, 15) is connected between the input terminal (30) and the output terminal (35), the first voltage divider (20) is connected between the input terminal (30) and the reference potential terminal (34),
the second voltage divider (25) is connected between the output terminal (32) and the reference potential terminal (34),
the second switch (S2) is connected between the input terminal (30) and the output terminal (32),
the first switch (S1) is
connected between the input terminal (30) and a connection point of the first voltage divider (30) and the second switch (S2), or
connected between the output terminal (32) and a connection point of the second voltage divider (25) and the second switch (S2),
a first measurement connection (42) of the measuring device (40) is connected to a connection point of the third resistor (R3) and the fourth resistor (R4) of the second voltage divider (25),
a second measurement connection (44) of the measuring device (40) is connected to a connection point of the first resistor (R1) and the second resistor (R2) of the first voltage divider (20),
the measuring device (40) is configured to measure a voltage at the first measurement connection (42) and the second measurement connection (44), respectively, and to transmit a result of the respective measurements to the analysis unit (50), and
the analysis unit (50) is configured to
determine a corrective factor for a balance between the first voltage divider (20) and the second voltage divider (25) while the first switch (S1) is open and the second switch (S2) is closed by means of a control by the analysis unit (50),
correct, using the corrective factor, a voltage difference between the first measurement input (42) and the second measurement input (44) of the measuring device (40), and
determine a state of the electrical component (10, 15) based on an evaluation of a voltage difference corrected by the corrective factor between the first measurement input (42) and the second measurement input (44) of the measuring device (40), while the first switch (S1) is closed by means of a control by the analysis unit (50) and the second switch (S2) is open.