This application discloses a detection circuit, an anti-backflow system, and a charging pile. The detection circuit mainly includes a detection power supply and a digital unit that are connected in series. A first end and a second end of the detection circuit are respectively connected to an input end and an output end of an anti-backflow circuit. The detection power supply may make an electric potential at the second end of the detection circuit higher than that at the first end of the detection circuit. When transmitting a detection current, the digital unit may output a first level signal indicating that the anti-backflow circuit fails. The detection current is a current transmitted when a loop is formed between the first end and the second end of the detection circuit. In this application, a detection result of the detection circuit does not depend on detection precision of a voltage value. This helps improve accuracy of failure detection of the anti-backflow circuit. In addition, the detection circuit may perform failure detection before a charging pile is connected to a power battery. This further helps protect safety of an electric vehicle.
DETECTION CIRCUIT, BACKFLOW PREVENTION SYSTEM, AND CHARGING PILE
DETEKTIONSSCHALTUNG, RÜCKFLUSSVERHINDERUNGSSYSTEM UND LADESÄULE
CIRCUIT DE DÉTECTION, SYSTÈME ANTI-REFLUX ET PILE DE CHARGE
2024-05-15
Patent
Electronic Resource
English
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