Charge and discharge device for on-board battery and control method of charge and discharge device

Abstract

The invention relates to a charge and discharge device for an on-board battery. The charge and discharge device comprises a grid-combined switch, a charge and discharge selective switch, an inverter, an inductive device, a signal detecting unit and a controller; the grid-combined switch is selectively communicated with an external power supply and the inverter according to the different types of the external power supply; the inductive device is connected between the inverter and the grid-combined switch; the signal detecting unit is used for detecting the coherent signals of the external power supply, the charge and discharge selective switch and the on-board battery and transmitting the signals to the controller; and the controller is used for controlling the work of the grid-combined switch and the inverter according to the received signals. The invention also provides a method for controlling the charge and discharge device. The charge and discharge device performs charging and discharging by controlling the charge and discharge power according to the SOC (System On Chip) of the on-board battery, thereby shortening the charge and discharge time. Meanwhile, the grid-combined switch is selectively closed according to the different types of the external power supply, so as to perform charging and discharging.

Description

technical field [0001] The invention relates to a charging and discharging device for a vehicle battery and a control method thereof. Background technique [0002] With the development of science and technology, environmentally friendly and energy-saving electric vehicles are playing the role of replacing fuel vehicles. However, the popularization of electric vehicles still faces some problems, including high energy density, safe and reliable batteries, low cost, small size, safe and reliable On-board fast charging devices have gradually become a major concern of the industry. When a battery with large capacity and high energy density is designed, the main problem faced by electric vehicles turns to the charging problem. [0003] Large-capacity batteries can improve the electric endurance of electric vehicles, but the same large-capacity batteries also bring the problem of long charging time. Although the charging station can quickly charge the battery, the high cost and la...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the vehicle-mounted battery has a long charging time and can only be applied to a single power source in the prior art, the present invention provides a vehicle-mounted battery charging and discharging device with a short charging time and applicable to different types of power sources and its control method

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