Double-voltage composite energy storage method and device for electric or hybrid power vehicle

Abstract

The invention provides a double-voltage composite energy storage method and device for an electric or hybrid power vehicle. An intermediate energy storage system and a switch are additionally arranged on the basis of the original battery energy storage system of the electric or hybrid power vehicle, the battery energy storage system is isolated in the processes of recovering energy and releasing the recovered energy by controlling the switch to open and close, and a temporary storage space is provided by the intermediate energy storage system for the recovered energy so that the energy of the vehicle can still be recovered and released without using a battery and that energy can be maximally recovered to increase the traveling mileage of the vehicle in a purely electric way and simultaneously prolong the service life of the battery. The method and the device provided by the invention are simple in principle, low in implementation cost and high in reliability, increase the utilization rate of energy effectively, save resources and are suitable for popularization.

Description

technical field [0001] The invention relates to an electric or hybrid vehicle energy storage method and device, in particular to a dual-voltage composite energy storage method and device for the electric or hybrid vehicle. The invention belongs to the technical field of energy recovery and treatment of systems. Background technique [0002] With the increasing scarcity of energy and the deterioration of the environment, pure electric or hybrid vehicles that are more energy-efficient and environmentally friendly are born. The biggest difference between an electric or hybrid car and a traditional car is that its energy source is electrical energy rather than chemical energy. The biggest problem in the large-scale promotion and application of electric or hybrid vehicles is the battery problem. Due to the constraints of battery technology, technical difficulties such as battery life and battery energy recovery have not been resolved. Under the current battery technology condit...

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Problems solved by technology

[0004] The biggest disadvantage of the single-voltage energy storage system platform is that it cannot solve the contradiction between battery life and driving range in pure electric mode. In urban public transport conditions or other congested conditions, braking time is long. If you want to increase the driving range in pure electric mode , it is necessary to increase electric braking energy recovery, but high current braking energy recovery will reduce the battery life, and the braking energy recovery and release are all transferred through the energy storage system, even if the current is reduced, the battery life is also reduced

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