Pure electric vehicle high-voltage interlocking control method

Abstract

The invention belongs to the technical field of new energy vehicles, and particularly relates to a pure electric vehicle high-voltage interlocking control method. The pure electric vehicle high-voltage interlocking control method specifically comprises the following steps that vehicle high-voltage interlocking is divided into all independent systems, the high-voltage interlocking integrity insideall the systems is detected by all the systems, then high-voltage interlocking signals are fed back to a VCU through a CAN bus, and the VCU conducts judgment processing after conducting unified summarizing. The pure electric vehicle high-voltage interlocking control method has the beneficial effects that through the mode that high-voltage interlocking detection is divided into all the systems, thearrangement cost and difficulty of vehicle wiring harnesses are reduced, the transmission efficiency is also improved through the mode of CAN bus transmission, all the working conditions such as charging, travelling and motionlessness are considered overall, different control strategies are put forward in a targeted mode, and the traffic safety can be ensured more effectively.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a high-voltage interlock control method for a pure electric vehicle. Background technique [0002] With the rapid development of new energy vehicles, there are more and more high-voltage components on the vehicle, so the safety control of high-voltage components on the vehicle becomes more and more important. High-voltage interlock also refers to the dangerous high-voltage interlock circuit (HVIL HazardousVoltage Interlock Loop): Check the electrical integrity and continuity of high-voltage products, wires, connectors and covers of the vehicle by using electrical signals, and disconnect the high-voltage power in time when the circuit is identified as abnormal. [0003] Most of the existing high-voltage interlock implementation schemes connect the entire high-voltage circuit in series through the low-voltage wiring harness, and the vehicle controller perfor...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing high-voltage interlocking implementation schemes connect the entire high-voltage circuit in series through the low-voltage wiring harness, and the vehicle controller performs unified detection. When the vehicle controller recognizes that a wiring harness is disconnected or not connected, the vehicle will Controlling high-voltage disconnection not only increases the difficulty and cost of wire harness layout, but also may cause more failures, such as wire harness scraping and disconnection, which will lead to unexpected high-voltage cut-off commands

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