Natural gas power generation electric bus power system and equipment

Abstract

The embodiment of the invention relates to a natural gas power generation electric bus power system and equipment. The natural gas power generation electric bus power system comprises a natural gas fuel storage tank, a natural gas engine, a generator, a super capacitor energy storage device, a controller and a motor which are connected in sequence. The natural gas fuel storage tank is a vehicle-mounted LNG storage tank, and a fuel stored in the vehicle-mounted LNG storage tank is an LNG liquid. A vaporizer absorbs heat to form a natural gas; the cost of LNG is lower than that of gasoline and diesel oil; the natural gas engine is under the maximum stable working condition, and effective heat efficiency is high; the LNG natural gas engine provided by the invention is used for efficiently generating power so that the worry of endurance of the electric bus can be eliminated; in hot summer, according to the LNG liquefied natural gas power generation electric bus power system and equipment provided by the embodiment of the invention, a refrigeration requirement in the electric bus can be guaranteed without installing an air conditioner; and cost and an equipment space of air conditioning equipment can be saved, a large amount of electric energy consumed by the air conditioning equipment can be saved, and multiple purposes are achieved.

Description

technical field [0001] The invention relates to electric vehicles or electric buses, or electric buses, or tourist buses, or refrigerated vehicles, and other fields that require natural gas power generation and natural gas mobile power generation equipment, and particularly relates to an electric bus powered by natural gas. Background technique [0002] Electric vehicles have the advantages of low noise, energy saving, environmental protection, economy, fast acceleration, simple structure, convenient maintenance, and easy maintenance; but there are also problems such as short cruising range, difficult charging, slow charging, and long charging time. The investment in the construction of charging stations or charging piles is huge; in addition, the power battery needs to be replaced in about 5 years, and the recycling of power batteries faces the dilemma of high recycling cost and difficult recycling technology. [0003] The daily mileage of electric buses is about 220 kilome...

AI Technical Summary

Problems solved by technology

The current on the DC side (537V) will reach 800A; from the perspective of power grid security, the charging method used by buses will cause a large-scale concentration of high-voltage and high-current DC chargers connected to the power grid, which will bring a large load impact to the distribution network. Serious overloading of the distribution network

[0004] In the hot summer, for the comfort of personnel, electric vehicles turn on the air conditioning equipment for cooling, which intensifies the loss of battery energy of electric buses, resulting in frequent charging of electric buses

Refrigerated trucks and fishing boats and other refrigerated and frozen transportation equipment; energy is consumed during the transportation process, used for refrigeration equipment such as refrigerated trucks or fishing boats, or a large amount of ice needs to be transported, and the production of ice also consumes energy and requires personnel to carry it

[0005] The current electric vehicles or electric buses mostly charge charging piles, which require digging trenches to set up cables with thick cross-sections, and other additional costs are also high. Due to battery capacity and quality, electric buses have short battery life and battery life. Short and other questions

[0006] On the surface, hydrogen fuel cell vehicles meet the requirements of energy saving and environmental protection; however, hydrogen production and purification require energy; hydrogen needs about 70MPa high pressure to compress and also consumes energy; there is also a lot of loss in hydrogen storage, hydrogen transportation, and use. The efficiency is further reduced; compared with mature lithium batteries, hydrogen fuel cell vehicles have higher storage costs, higher transportation risks, and more expensive investment in hydrogen refueling station infrastructure; according to data released by the US Department of Energy, by 2020 To achieve the life target of 5,000 hours; metal platinum is used as a catalyst in the power generation process of hydrogen fuel cells, and the price of metal platinum is high due to the scarcity of metal platinum. If hydrogen fuel cells continue to be produced on a large scale, the greater the demand, the cost of metal platinum will increase. Greater scarcity and higher cost

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