US 11,867,748 B2
Electrical control device detection circuit, detection method, and electric vehicle
Baohai Du, Ningde (CN); Changjian Liu, Ningde (CN); and Yanhui Fu, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Dec. 15, 2021, as Appl. No. 17/552,348.
Application 17/552,348 is a continuation of application No. PCT/CN2020/110652, filed on Aug. 22, 2020.
Claims priority of application No. 201910818417.1 (EH), filed on Aug. 30, 2019.
Prior Publication US 2022/0107353 A1, Apr. 7, 2022
Int. Cl. G01R 31/00 (2006.01); G01R 31/28 (2006.01); G01R 31/52 (2020.01); G05B 23/02 (2006.01); B60L 50/60 (2019.01)
CPC G01R 31/282 (2013.01) [B60L 50/60 (2019.02); G05B 23/02 (2013.01); B60L 2240/40 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An electrical control device detection circuit for detecting a drive circuit of an electrical control device, wherein the drive circuit of the electrical control device comprises a drive power module, a high-side switch unit, and a low-side switch unit, the drive power module is connected to a first end of the high-side switch unit, a second end of the high-side switch unit is connected to a first end of the electrical control device, a first end of the low-side switch unit is connected to a second end of the electrical control device, and a second end of the low-side switch unit is grounded; and the electrical control device detection circuit comprises: a detection power module, a first switch module, a second switch module, a first detection module, a second detection module, and a control module;
an output end of the detection power module is connected to a first end of the first switch module, a second end of the first switch module is connected to the first end of the electrical control device, a first end of the first detection module is connected to a first node between the second end of the first switch module and the first end of the electrical control device, a second end of the first detection module is connected to the second end of the electrical control device, and a third end of the first detection module is connected to the control module; a first end of the second detection module is connected to a second node between the second end of the electrical control device and the second end of the first detection module, a second end of the second detection module is connected to the control module, and a third end of the second detection module is grounded; the first switch module and the second switch module are connected to the control module separately; and the second switch module is serially connected between the first end of the first detection module and the first node, or, the second switch module is serially connected between the second end of the first detection module and the second node; and
the control module is configured to:
obtain an electrical signal at the third end of the first detection module, and determine, based on the electrical signal at the third end of the first detection module, whether a fault occurs in the drive circuit of the electrical control device; or
obtain an electrical signal at the second end of the second detection module, and determine, based on the electrical signal at the second end of the second detection module, whether a fault occurs in the drive circuit of the electrical control device; or
obtain an electrical signal at the third end of the first detection module and an electrical signal at the second end of the second detection module, and determine, based on the electrical signal at the third end of the first detection module and the electrical signal at the second end of the second detection module, whether a fault occurs in the drive circuit of the electrical control device.