Compound power system easy to replace and control method

Abstract

The invention relates to a compound power system easy to replace and a control method. The system comprises an internal energy storage power supply module connected with a motor in an automobile, an extensible energy storage power supply module connected with the motor in the automobile, and a power conversion module connected with the motor, the internal energy storage power supply module, the extensible energy storage power supply module and a controller in the automobile and used for controlling the power supply states of the internal energy storage power supply module and the extensible energy storage power supply module under the control of the controller. The method includes the steps that when the automobile is in a drive state, the motor power supply modes of the extensible energystorage power supply module and the internal energy storage power supply module are adaptively adjusted according to the internal electric quantities of the extensible energy storage power supply module and the internal energy storage power supply module; and if the automobile is in a braking or charging state, components are sequentially charged according to the sequence of the internal energy storage power supply module and energy storage elements short in energy. Compared with the prior art, the system has the beneficial effects of being convenient to replace, capable of saving cost, high in energy use rate and the like.

Description

technical field [0001] The invention relates to the application field of pure electric vehicles, in particular to an easily replaceable composite power supply system and a control method. Background technique [0002] Electric vehicles have developed rapidly in recent years, but short driving range and long charging time have always been the key problems hindering the development of electric vehicles. For electric vehicles, the use of battery replacement can quickly and effectively provide sufficient power sources for vehicles, and the establishment of multiple battery replacement stations in cities can fundamentally solve the problem of driving range for electric vehicles. [0003] At present, the battery exchange mode used by the battery exchange station is divided into a centralized charging mode and a charging and battery exchange mode. The centralized charging mode refers to the centralized storage, centralized charging, and unified distribution of a large number of ba...

AI Technical Summary

Problems solved by technology

[0005] 1. The cost of battery replacement is high: the battery replacement system is very complicated and increases the cost of the infrastructure of the battery replacement station;

[0006] 2. Slow battery replacement speed: Although the battery replacement system realizes automatic battery replacement, it takes a long time to replace the battery;

[0007] Patent CN104015626A provides a configuration and control method of a composite power supply system, which supplies power to the engine in the car through a supercapacitor and a power battery, and uses the characteristics of the supercapacitor itself to effectively increase the capacity of the power supply system. However, the system still only has A single power battery is the main energy storage component of electric vehicles, and the modular design of the battery has not been realized, and the power supply mode of the engine-generator set reduces the energy conversion efficiency and is economical

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