Vehicle-mounted charger of electric vehicle and vehicle-mounted DC/DC (direct-current/direct-current) integrated system

Abstract

The invention relates to the field of electric vehicles, and provides a vehicle-mounted charger of an electric vehicle and a vehicle-mounted DC/DC (direct-current/direct-current) integrated system. The vehicle-mounted charger of the electric vehicle and the vehicle-mounted DC/DC integrated system comprise a charging insertion gun, a CC (communication center) confirmation line, a CAN (controller area network) communication line, a battery management system (BMS), an integrated controller, a 12V storage battery, a relay I, a relay II, a high-voltage power storage battery, a casing and a radiating system. The integrated controller mainly comprises a bridge rectifier, a relay I, a switch MOS (metal oxide semiconductor) power tube and a switch power supply transformer, the charging insertion gun, the bridge rectifier, the relay I, the switch MOS power tube and the switch power supply transformer are sequentially connected, one end of the battery management system (BMS) is connected with the charging insertion gun through the CC confirmation line, the other end of the battery management system (BMS) is connected with the relay II and directly feeds a CC confirmation signal to the integrated controller through the CAN communication line, two poles of the high-voltage power storage battery are connected with an output end of the relay I and are also connected with an output end of the switch power supply transformer through a switch K2, and two poles of the 12V storage battery are directly connected with the other output end of the switch power supply transformer.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a vehicle-mounted charger and a vehicle-mounted DC that utilizes a switching power supply to combine two existing systems, can be charged during driving and parking, and can reduce the cost of parts and components to realize vehicle weight reduction. / DC integrated system. Background technique [0002] At present, the lightweight, low-cost, and integrated development of the electric vehicle industry is market-oriented, and the battery of electric vehicles has always been a bottleneck that has not been broken through. In order to make efficient use of limited battery energy, it is required that the motors of electric vehicles must be high-efficiency and wide-ranging. Lightweight, miniaturized and energy-saving, and its core components are the on-board charger and on-board DC / DC device as the circuit of the switching power supply system. At present, the on-board charger and on-boa...

AI Technical Summary

Problems solved by technology

At present, the on-board charger and on-board DC / DC for electric vehicles on the market are two independent systems. Each system has independent electronic components and heat dissipation shells. The cost is high and the overall layout space of the vehicle is occupied, which is not conducive to the lightweight of the vehicle. and cost control, the electric vehicle on-board charger and on-board DC / DC integrated integrated system can solve some problems as a control unit of the electric vehicle

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