公开(公告)号：US11440535B1

公开(公告)日：2022-09-13

申请号：US17203853

申请日：2021-03-17

申请人： LG Chem, Ltd.

发明人： Sagar Nagaluru ,  Sandeep Vankineni ,  Nitin Bharane

IPC分类号： B60W20/00 ,  B60W20/50 ,  B60W10/24 ,  B60W50/02 ,  H03K19/20

摘要： A diagnostic system for a hybrid electric vehicle is provided. The system includes a vehicle controller, a battery management controller, a monitoring circuit, a transistor, a voltage sensor, and an analog-to-digital converter. The vehicle controller sends a first message to the battery management controller indicating an engine crank occurred. The battery management controller sends a second message to the monitoring circuit, and the monitoring circuit induces a transistor to de-energize an electrical relay. The voltage sensor outputs a voltage signal indicative of a voltage being output by the transistor. The analog-to-digital converter outputs a voltage value indicative of the voltage. The battery management controller sets a diagnostic flag to a first non-fault value if the voltage value is less than a threshold voltage value.

公开(公告)号：US11661950B2

公开(公告)日：2023-05-30

申请号：US16953534

申请日：2020-11-20

申请人： LG Chem, Ltd.

发明人： Sagar Nagaluru ,  Sandeep Vankineni ,  Nitin Bharane

IPC分类号： G01R31/50 ,  F04D27/00 ,  G07C5/08 ,  G01R31/08 ,  G01R23/02 ,  G07C5/00 ,  B60R16/023

CPC分类号： F04D27/004 ,  B60R16/0234 ,  F04D27/001 ,  G01R23/02 ,  G01R31/08 ,  G01R31/50 ,  G07C5/006 ,  G07C5/0808 ,  G07C5/0816

摘要： A diagnostic system includes a fan control circuit coupled to an electric fan and a microcontroller, and a sense line coupled to the fan control circuit and the microcontroller. The fan control circuit outputs a fan command sense signal at a duty cycle through the sense line to the microcontroller. A tachometer generates a tachometer signal at a frequency indicative of the rotational speed of the electric fan. A fan tachometer circuit receives the tachometer signal and outputs the tachometer sense signal at a frequency to the microcontroller in response to the tachometer signal. The microcontroller sets a second diagnostic flag to an error value indicating that the sense line has impaired operation if the frequency of the tachometer sense signal is within a desired frequency range, and a first diagnostic flag is equal to a first error value.

公开(公告)号：US20220297669A1

公开(公告)日：2022-09-22

申请号：US17203853

申请日：2021-03-17

申请人： LG Chem, Ltd.

发明人： Sagar Nagaluru ,  Sandeep Vankineni ,  Nitin Bharane

IPC分类号： B60W20/50 ,  H03K19/20 ,  B60W50/02 ,  B60W10/24

摘要： A diagnostic system for a hybrid electric vehicle is provided. The system includes a vehicle controller, a battery management controller, a monitoring circuit, a transistor, a voltage sensor, and an analog-to-digital converter. The vehicle controller sends a first message to the battery management controller indicating an engine crank occurred. The battery management controller sends a second message to the monitoring circuit, and the monitoring circuit induces a transistor to de-energize an electrical relay. The voltage sensor outputs a voltage signal indicative of a voltage being output by the transistor. The analog-to-digital converter outputs a voltage value indicative of the voltage. The battery management controller sets a diagnostic flag to a first non-fault value if the voltage value is less than a threshold voltage value.

公开(公告)号：US20220163042A1

公开(公告)日：2022-05-26

申请号：US16953534

申请日：2020-11-20

申请人： LG Chem, Ltd.

发明人： Sagar Nagaluru ,  Sandeep Vankineni ,  Nitin Bharane

IPC分类号： F04D27/00 ,  G07C5/08

摘要： A diagnostic system includes a fan control circuit coupled to an electric fan and a microcontroller, and a sense line coupled to the fan control circuit and the microcontroller. The fan control circuit outputs a fan command sense signal at a duty cycle through the sense line to the microcontroller. A tachometer generates a tachometer signal at a frequency indicative of the rotational speed of the electric fan. A fan tachometer circuit receives the tachometer signal and outputs the tachometer sense signal at a frequency to the microcontroller in response to the tachometer signal. The microcontroller sets a second diagnostic flag to an error value indicating that the sense line has impaired operation if the frequency of the tachometer sense signal is within a desired frequency range, and a first diagnostic flag is equal to a first error value.