Intelligent high-voltage management system of electric car

Abstract

The invention provides an intelligent high-voltage management system of an electric car. According to the intelligent high-voltage management system of the electric car, a signal collecting system collects the car operation state, failure detection object state and car posture state in real time; an intelligent high-voltage control unit receives an instruction of a vehicle control unit (VCU) and / or a battery management system (BMS), enables a high-voltage electricity distribution system to normally distribute electricity to vehicle high-voltage equipment and feeds back the execution result to the VCU and / or the BMS; meanwhile, fault diagnosis and detection are carried out on the high-voltage electricity distribution system according to collected data and received vehicle real-time interaction data; the fault type is determined according to a preset fault database, the high-voltage electricity distribution system is made to execute the high-voltage electricity on-off control logic under the preset fault types, and the diagnosis result is stored and sent; the high-voltage electricity distribution system caries out high-voltage electricity distribution, high-voltage electricity on / off control, circuit overcurrent protection and high-voltage pre-charging on all high-voltage devices of the car according to the instruction of the intelligent high-voltage control unit. The intelligent high-voltage management system of the electric car realizes intelligent management of high-voltage electricity of the whole car, and better improves the high-voltage safety of the electric car.

Description

technical field [0001] The invention relates to the technical fields of automotive electronic equipment and new energy vehicles, in particular to an intelligent high-voltage management system for electric vehicles. Background technique [0002] After the government's vigorous promotion and support in recent years, my country's electric vehicle battery technology, motor and motor control technology, and vehicle control technology have all made some progress. Electric vehicles have also entered the stage of small-batch production, but electric vehicles frequently catch fire. And high-voltage electricity safety still affects consumers' wait-and-see attitude towards electric vehicles. Electric vehicles introduce a high voltage of up to 300-700VDC (generally cars and mini cars are driven by about 300VDC, buses or commuter vehicles are driven by about 600VDC), and the energy storage system uses power batteries, supercapacitors or fuel cells. Security is more worthy of attention an...

AI Technical Summary

Problems solved by technology

For example, if the high-voltage power distribution is integrated to form a high-voltage power distribution system, it is conducive to the processing and finding of high-voltage power faults, and it is easy to manage; if it is distributed, it needs the coordinated control of the vehicle controller and corresponding components, which sometimes leads to control division. Failure due to ambiguous layers

In addition, when there is a high-voltage hardware failure, it is not easy to repair and find the problem

For the fault detection and monitoring of high-voltage electricity, it is mainly integrated in the battery management system (BMS), and the main function of the BMS is to manage the power battery. It is designed and produced by the manufacturer alone, and it is often difficult to intervene in the entire vehicle. Moreover, the management of power batteries involves a large amount of data and complex procedures, so that the high-voltage safety management of electric vehicles has not been practically applied to real vehicles.

[0004] Relevant domestic patents include: Chinese patent 201210060571.5 discloses a smart vehicle-mounted high-voltage power distribution management unit for electric vehicles, which only includes the distribution and data sharing of high-voltage vehicles, but only controls the DC contactor, and does not involve high-voltage electrical components. Fault self-detection and self-diagnosis of components and high-voltage fault handling method under high-voltage fault of the whole vehicle; 201220332799.0 discloses a fault self-detection device for high-voltage box of electric vehicles, which does not carry out intelligent management of high-voltage electric energy of the whole vehicle

Images