公开(公告)号：US11719761B2

公开(公告)日：2023-08-08

申请号：US17407747

申请日：2021-08-20

Applicant: STMicroelectronics S.r.l.

Inventor： Davide Argento ,  Orazio Pennisi ,  Stefano Castorina ,  Vanni Poletto ,  Matteo Landini ,  Andrea Maino

IPC: G01R31/64 ,  G01R27/26 ,  G01R31/00

CPC classification number: G01R31/64 ,  G01R27/2605 ,  G01R31/006

Abstract: A system and method for measuring a capacitance value of a capacitor are provided. In embodiments, a resistor is coupled to a terminal of the capacitor. A difference in voltage at the terminal between a first time and a second time during a discharge routine of the capacitor is measured. The discharge routine includes sinking a current through a discharge circuit coupled to the resistor from first to second. Integration of a difference in voltage at terminals of the resistor during the discharge routine between the first and second times is also measured. The capacitance value is computed based on the measured difference in voltage, the measured integration, and the resistance value of the resistor. The health of the capacitor is determined based on a difference between the computed capacitance value and a threshold value.

公开(公告)号：US20230054951A1

公开(公告)日：2023-02-23

申请号：US17407725

申请日：2021-08-20

Applicant: STMicroelectronics S.r.l.

Inventor： Davide Argento ,  Orazio Pennisi ,  Stefano Castorina ,  Vanni Poletto ,  Matteo Landini ,  Andrea Maino

IPC: G01R19/10 ,  H03M1/12 ,  H03M3/00 ,  B60R21/017

Abstract: A system and method is provided for measuring a voltage drop at a node. In embodiments, a circuit includes an analog-to-digital converter, a current sink, and a controller. The input of the analog-to-digital converter and the input of the current sink is coupled to the node to be measured. A set point for the current sink is determined. The output of the analog-to-digital converter during the voltage drop is sampled. And a relative voltage drop value is computed by subtracting the sampled output of the analog-to-digital converter during the voltage drop from a sampled output of the analog-to-digital converter during a steady-state condition. The current sink operating at the set point during the steady-state condition and during the voltage drop.

公开(公告)号：US20220190585A1

公开(公告)日：2022-06-16

申请号：US17454228

申请日：2021-11-09

Applicant: STMicroelectronics S.r.l.

Inventor： Nicola Errico ,  Antonio Giordano ,  Orazio Pennisi ,  Leonardo Pedone ,  Luca Finazzi

IPC: H02H3/087 ,  B60R16/03

Abstract: A circuit includes comparator circuitry to sense a current through a load and compare the intensity of the current with a comparison threshold which can be set to a first, lower threshold value and a second, higher threshold value. Logic circuitry receives from the comparator circuitry a comparison signal having a first value or a second value based on whether the intensity is lower or higher than the comparison threshold. The logic circuitry is configured to assert a first overcurrent event signal or a second overcurrent event signal based on the comparison signal having the first value or the second value and the comparison threshold set to the first or second threshold value.

公开(公告)号：US11312238B2

公开(公告)日：2022-04-26

申请号：US16893771

申请日：2020-06-05

Applicant: STMicroelectronics S.r.l.

Inventor： Orazio Pennisi ,  Valerio Bendotti ,  Vittorio D'Angelo ,  Paolo Turbanti

IPC: B60L3/00 ,  H02J7/00 ,  B60L58/20 ,  B60L50/60 ,  B60K6/28

Abstract: A method can be used to control a battery management system. A first voltage drop is sensed between a first terminal of a first battery cell and a second terminal of the first battery cell and a second voltage drop is sensed between a first terminal of a second battery cell and a second terminal of the second battery cell. A faulty condition is detected in the first battery cell or the second battery cell based on the first voltage drop or the second voltage drop. The first voltage drop is swapped for a first swapped voltage drop between a common terminal and the second terminal of the second battery cell.

公开(公告)号：US11079442B2

公开(公告)日：2021-08-03

申请号：US16420992

申请日：2019-05-23

Applicant: STMicroelectronics S.r.l.

Inventor： Orazio Pennisi ,  Valerio Bendotti ,  Vanni Poletto ,  Vittorio D'Angelo

IPC: H01M10/48 ,  B60L58/22 ,  G01R31/396 ,  H02J7/00 ,  H01M10/46 ,  G01R31/50 ,  G01R31/52 ,  G01R31/54

Abstract: A method of operating a control device includes performing an open load test or a current leakage test. The open load test includes activating a first current and then a second current and sensing with the first current and the second current activated, respectively, a first voltage drop and a second voltage drop between charge distribution pins and charge sensing pins of the control device. Respective differences are calculated between the first voltage drop and the second voltage drop sensed with the first current and the second current activated, respectively. These differences are compared with respective thresholds and an open circuit condition is declared as a result of the differences calculated reaching these thresholds.