An electric vehicle with intelligent power balance

Abstract

The invention discloses an intelligent power equalization type electric vehicle. The intelligent power equalization type electric vehicle comprises: a vehicle body on which at least one power supply ports are arranged; two groups of power supply batteries which are fixed on the vehicle body and electrically connected to the power supply ports, wherein each group of power supply batteries is composed of a plurality of rechargeable battery units, a first multiple-winding transformer is arranged between every two battery units, each battery unit is provided with a first bilateral switch on the line connected to the first multiple-winding transformer, a second multiple-winding transformer is arranged between the two groups of power supply batteries, and each group of power supply batteries is provided with a second bilateral switch on the line connected to the second multiple-winding transformer; a starting switch which is arranged on the vehicle body for starting the at least two groups of power supply batteries to supply power to the vehicle body at the same time; and a controller. According to the invention, the bilateral switches are controlled by the controller to make the energy between the batteries transferred through the multiple-winding transformers so as to realize intelligent power equalization.

Description

technical field [0001] The invention relates to an electric vehicle, in particular to an electric vehicle capable of intelligently balancing electric power. Background technique [0002] At present, with the shortage of national oil supply and the seriousness of environmental pollution, electric vehicles powered by electric energy can be seen everywhere in the streets and alleys, greatly improving the degree of environmental pollution. The existing electric vehicles are equipped with a set of power supply batteries, and then rely on the batteries to power the electric vehicles when starting the electric vehicles, although the power supply batteries are all connected in series and parallel with several low-voltage and small-capacity battery units. Higher voltage and larger capacity are obtained, but there is still the problem of short battery life due to the limited power contained in it, so the battery needs to be charged almost every day to meet user needs. Of course, some...

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Problems solved by technology

[0003] But, because two groups of power supply batteries are installed on the electric vehicle, and what supply power is usually only one of them, people tend to habitually only charge one of them for the group of power supply batteries, but ignore the charging of the power supply batteries. Another set of batteries is charged, so that the life of the other set of batteries is greatly reduced due to the long storage time and the small number of charging times, which also makes the electric vehicle lose the meaning of installing two sets of power supply batteries.

[0004] Furthermore, since each group of power supply batteries is composed of multiple small-capacity battery cells connected in series and parallel, and these battery cells are often impossible to have exactly the same performance during the manufacturing process, these performance differences will often change with charging. Factors such as the temperature change of discharge become more and more prominent, so that during the charging and discharging process of the battery, either the battery cells with low power are over-discharged, and the battery cells with high power are over-charged, or there will be a phenomenon of overcharging due to any one of the battery cells. When the voltage is too low, the entire set of power supply batteries will stop supplying power. When the voltage of any one battery unit is too high, the phenomenon of charging the entire set of power supply batteries will stop. No matter what the situation is, it will affect the use capacity and usage of the entire set of power supply batteries. life

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