Running and charging interlocking device of electric vehicle

Abstract

The invention discloses a running and charging interlocking device of an electric vehicle. The device comprises low and high-voltage power distribution circuits, a charger and an energy storage system, wherein the anodes and the cathodes of the charger and the energy storage system are connected with a contactor K5 and a contactor K6 respectively; in a running state, the contactors K5 and K6 are disconnected, and the charger and the energy storage system are disconnected; when a charger plug is inserted into a charge port socket, a charging contactor is connected, the control signal of a charging contactor controller is just switched on, the contactors K5 and K6 are connected, the charger and the energy storage system are switched on, and the whole vehicle is in a charging state; and the input of a key switch 12V or 24V is just cut off, and the outputs of a key switch ACC gear and an ON gear do not carry charges so as to ensure that the vehicle does not run during charging. According to the technical scheme of the invention, interlocking of charging and running circuits is comprehensively realized by the high and low-voltage power distribution circuits, and hidden dangers of the electric vehicle in the running or charging state due to error operation of a driver in the practical running process are avoided.

Description

Technical field [0001] The invention relates to a driving charging interlocking device, in particular to a driving charging interlocking high and low voltage power distribution device applied to a pure electric vehicle. Background technique [0002] With the development of technologies such as batteries and electronic control, the advantages of pure electric vehicles have become more and more obvious. At the same time, the safety performance of pure electric vehicles has also received sufficient attention. For example, high voltage safety during driving and charging. When driving, the connection between the charging port and the power battery must be cut off; and during charging, the high voltage related to driving must also be cut off. [0003] In the power distribution of the pure electric system circuit, some of the charging port sockets are often charged, and some need to activate a button switch to turn on the charging contactor, or directly add a single-pole double-throw swit...

AI Technical Summary

Problems solved by technology

If the charging port socket is often charged, once an accident occurs in the car, it is likely that a serious safety accident will occur in the charging port socket; if a button switch is added to start the charging contactor, or a single-pole double throw switch is used to connect the battery to the charging port socket, On the one hand, this increases the complexity of the operation, on the other hand, it is easy to disconnect the charging circuit by misoperation during the charging process, and it is easy to damage the contactor or contact switch.

[0004] On the other hand, the charging time of a pure electric vehicle is 3 to 4 hours. During the charging process, the battery management system, data acquisition, vehicle controller and other equipment need to be turned on. If only the battery is used for power supply, the battery may lose power; if the DC / DC power supply, then the charging interlock cannot be effectively guaranteed when charging

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