Photovoltaic system for electric vehicle

Abstract

The invention discloses a photovoltaic system for an electric vehicle. The photovoltaic system comprises a storage battery pack, a photovoltaic component, a voltage stabilizing module, an overall voltage detecting module, an overall charging control module and an overall trickle charging module, wherein the storage battery pack is composed of a plurality of storage batteries which are serially connected. An output end of the photovoltaic component is connected with input ends of the voltage stabilizing module and the overall charging control module. An output end of the voltage stabilizing module is connected with input ends of the overall charging control module and the overall voltage detecting module, an output end of the overall charging control module and the input end of the overall voltage detecting module are connected with the storage battery pack, an output end of the overall voltage detecting module is connected with a signal input end of the overall charging control module, a trickle charge output end of the overall charging control module is connected with an input end of the overall trickle charging module, and an output end of the overall trickle charging module is connected with the storage battery pack. The photovoltaic system can charge the electric vehicle which drives or parks, assist the storage batteries in supplying power to increase driving range, and detect charging according to performance of single storage battery, so that performance deterioration of the single storage battery is avoided and service life of the storage battery pack is prolonged.

Description

technical field The invention relates to a photovoltaic system for an electric vehicle. Background technique With the development of science and technology, all kinds of electric vehicles are used more and more widely, which is of great significance to save natural energy, realize energy diversification and sustainable development. Generally, electric vehicles are powered by battery packs and driven by electric motors. Due to the characteristics of the battery, the general electric vehicle needs to charge the battery through the mains after parking to ensure the driving of the electric vehicle; at the same time, due to the limitation of the electric energy capacity of the battery pack, it is often affected by the exhaustion of the battery during the journey of the electric vehicle. Driving range. On the other hand, the electric vehicle battery pack is usually composed of multiple batteries connected in series. At the beginning of use, the battery pack meets the rated elect...

AI Technical Summary

Problems solved by technology

Due to the characteristics of the battery, the general electric vehicle needs to charge the battery through the mains after parking to ensure the driving of the electric vehicle; at the same time, due to the limitation of the electric energy capacity of the battery pack, it is often affected by the exhaustion of the battery during the journey of the electric vehicle. Driving range

On the other hand, the electric vehicle battery pack is usually composed of multiple batteries connected in series. At the beginning of use, the battery pack meets the rated electric energy capacity, but after a period of use, its rated electric energy capacity shows a downward trend, seriously affecting the normal operation of electric vehicles. driven distance

The reason is that due to the dispersion of the battery manufacturing process, one or more batteries in the multi-cell battery often have the phenomenon of low voltage and attenuation of electric energy capacity first. When the other batteries are fully charged when charging, the low-voltage battery is If it is not fully charged, other batteries still have power to continue working during discharge. The low-voltage battery has been discharged and the electric vehicle continues to work, which will cause over-discharge of the low-voltage battery. If it is not handled in time, the over-discharge phenomenon will continue to aggravate. Capacity attenuation and insufficient energy output will cause the low-voltag

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