Relay control system with fault diagnosis function

Abstract

A relay control system with a fault diagnosis function comprises a control module, a driving module, a relay module and a fault handling module. The control module can conduct self-inspection after the system is powered on, can transmit a fault to the fault handling module when the fault is detected in the self-inspection process, and can control the driving module to conduct self-inspection when no fault is detected in the self-inspection process. The driving module is used for transmitting a fault to the fault handling module when the fault is detected in the self-inspection process, can detect whether any fault exists in a SPI bus and whether a plurality of relays are off line when no fault is detected in the self-inspection process, and can transmit faults to the fault diagnosis module when faults exist in the SPI bus or the plurality of relays are off line. The fault handling module is used for correspondingly processing the received faults. The relay control system with the fault diagnosis function can detect faults of the relays and control circuits of the relays timely and handle the faults correspondingly.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of electric vehicles, in particular to a relay control system with fault diagnosis function applied to electric vehicles. [0003] 【Background technique】 [0004] At present, electric vehicles are gradually being promoted and will have broad prospects in the future. As the power source of electric vehicles, the power battery system's working stability and reliability directly affect the safety of electric vehicles. The power battery system usually uses a relay to cut off and close the power battery circuit. When the relay and its control circuit fail, but the power battery system cannot detect it in time, resulting in failure to deal with the fault in time, it will bring extreme damage to the electric vehicle. big security risk. [0005] In view of the above, it is necessary to provide a relay control system with fault diagnosis function to overcome the above defects. [0006] 【Content of inventio...

AI Technical Summary

Problems solved by technology

The power battery system usually uses a relay to cut off and close the power battery circuit. When the relay and its control circuit fail, but the power battery system cannot detect it in time, resulting in failure to deal with the fault in time, it will bring extreme damage to the electric vehicle. big security risk

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