Low-voltage power supply management system for safety monitoring of power battery of electric vehicle

Abstract

The invention discloses a low-voltage power supply management system for safety monitoring of a power battery of an electric vehicle, and relates to the technical field of vehicles. In the invention,a battery management system is used for conducting real-time monitoring or intermittent monitoring on vehicle state information mainly comprising a high-voltage state and a power battery pack state ina high-voltage box; whether the vehicle is in the running state or not, the vehicle state including but not limited to the battery management system, a vehicle-mounted monitoring unit and a whole-vehicle controller can be monitored online as long as a DCDC converter outputs power, the monitoring data is transmitted to a remote monitoring platform, and data monitoring and accident early warning are carried out by the platform, so that offline monitoring of the vehicle is realized, and the monitoring reliability and safety are improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, and more specifically refers to a low-voltage power supply management system for safety monitoring of power batteries of electric vehicles. Background technique [0002] In recent years, spontaneous combustion incidents of electric vehicles have occurred frequently, most of which are caused by power batteries, so the safety of power batteries has attracted much attention. In order to ensure vehicle safety and meet the country’s monitoring requirements for new energy vehicles, the existing method is to install a vehicle monitoring system on the vehicle to monitor the vehicle’s operating status information and upload the vehicle monitoring data to the remote monitoring of the enterprise in combination with the Internet of Vehicles technology. Platform, the platform can monitor and warn of accidents. The main problems in the actual use of this technology are: (1) After the vehicle is shut down,...

AI Technical Summary

Problems solved by technology

The main problems in the actual use of this technology are: (1) After the vehicle is shut down, the battery management system enters a dormant or power-off state, and the remote monitoring platform cannot obtain the status information of the power battery and identify potential failure risks for accident warning; (2) ) For the sake of safety, when the vehicle is off duty or needs to be stored for a long time, the 24V power supply on the vehicle is usually turned off through the hand brake switch. At this time, the low-voltage system of the vehicle is in a power-off state, and the remote monitoring platform cannot monitor and identify the status Potential failure risk for accident warning

Therefore, the existing technology can only realize the monitoring of the operating state and the early warning of accidents, there are monitoring blind spots, and the reliability and safety are poor

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