Hybrid electric system overvoltage protection method, apparatus, system, and storage medium

By monitoring the voltage of the DC-DC converter and the electronic control subsystem, and switching to the appropriate mode to handle overvoltage anomalies, the stability and safety issues caused by overvoltage anomalies in hybrid electric systems are resolved, enabling rapid restoration to normal operating conditions and reducing the risk of sudden vehicle stoppage.

CN122159642APending Publication Date: 2026-06-05HEFEI SUNSHINE POWER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI SUNSHINE POWER TECH CO LTD
Filing Date
2024-11-27
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In hybrid electric systems, the DC-DC converter and electronic control subsystem are prone to overvoltage abnormalities, which can cause excessive voltage stress on the switching transistors, affecting system stability and safety and potentially leading to sudden vehicle stoppage.

Method used

By monitoring the voltage on the input and output sides of the DC-DC converter, an overvoltage abnormality is identified, and the target device is switched to the target mode, such as the wave blocking mode or the active short-circuit mode, until the system returns to normal operation.

Benefits of technology

It improves the speed at which the hybrid electric system can handle overvoltage faults, ensuring system stability and safety, and reducing the risk of sudden vehicle stops.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of electric vehicles, and discloses a hybrid electric system overvoltage protection method, device, system and storage medium, which are used for improving the processing speed of a hybrid electric system in an overvoltage fault to make the hybrid electric system quickly transit from an overvoltage abnormal state to a normal state. The hybrid electric system overvoltage protection method comprises the following steps: judging whether an overvoltage abnormal state occurs in the hybrid electric system according to an input voltage of a DC-DC converter input side and / or a bus voltage of a DC-DC converter output side in the hybrid electric system; if the overvoltage abnormal state occurs, determining a target device corresponding to the overvoltage abnormal state, and switching the target device to a target mode until the hybrid electric system returns to a normal working state.
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