V2V fast charging system of vehicle-mounted charger and control method thereof

Abstract

The invention discloses a V2V fast charging system of a vehicle-mounted charger and a control method thereof. The V2V fast charging system outputs voltage regulation of a battery, and a fast charging cable comprises an on-cable control box, and a fast charging interface and a slow charging interface which are arranged at two ends of the on-cable control box; a discharge vehicle A is inserted into the slow charging interface, and a power receiving vehicle B is inserted into the fast charging interface; the discharge vehicle A carries a vehicle-mounted charger to obtain energy from a high-voltage battery pack of the discharge vehicle A, and the energy is adjusted into high-voltage direct current requested by the power receiving vehicle B through a V2V fast acting system; the on-cable control box constructs a signal channel and a charging channel of the discharge vehicle A and the power receiving vehicle B, and high-voltage direct current output by the discharge vehicle A is transmitted to the power receiving vehicle B. A charging circuit of the power receiving vehicle B does not need to be passed, limitation of power of the charging circuit of the power receiving vehicle B is avoided, the charging module of the discharge vehicle A of various specifications can be compatible, the charging speed reaches the maximum power of the discharge vehicle A, the charging time is shortened, the charging efficiency is improved, and the charging loss is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging and discharging, in particular to a circuit and a charging control method for a vehicle-mounted charger that outputs a high-voltage DC voltage to charge a power battery of another vehicle when it works in V2V. Background technique [0002] When the vehicle works in V2V mode, the discharge vehicle A inverts the voltage of the high-voltage battery pack into alternating current (AC220V, 50Hz), which is input to the receiving vehicle B through the discharge gun, and the receiving vehicle B rectifies and boosts the AC AC power to the power battery after operations such as Charge. attached figure 1 It is the traditional V2V mode charging method: the charger of discharge car A inverts the voltage of the battery pack into alternating current (AC), and outputs it to the electric vehicle B through the discharge gun, and the electric vehicle B rectifies and boosts the alternating current (...

AI Technical Summary

Problems solved by technology

[0003] Under the current technology, the V2V mode is limited by the power of the discharge terminal and the charging terminal, resulting in slow rescue, and the scene that needs rescue is mostly an emergency. Therefore, the market urgently needs a V2V fast charging system with fast charging speed and low loss. and its control method to solve the current situation of slow rescue of new energy vehicles

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