The electric bus also known as the electric medium bus or small electric bus is powered by the onboard power supply. It includes battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), and fuel cell electric vehicles (FCEVs). Three core components: battery, motor, and electronic control.
1. Brief Introduction of Small Electric Bus
Small electric bus vehicle includes battery electric vehicle (BEV), hybrid electric vehicle (HEV) and fuel cell electric vehicle (FCEV). All use electric energy driving. The characteristics are low noise, high driving stability, and zero emission. It has good power performance, long battery life (more than two years), and low cost. And is well with the whole vehicle. The small electric bus is the national 863 program, put forward a new generation of electric vehicle technology as the main direction of automotive technology innovation in our country.
Focusing on the industrialization technology platform of electric vehicles during the Eleventh Five-Year period, strive for a major breakthrough, seize the commanding height of new generation of the electric automobile industry, realize the diversity of transportation energy structure, maintain national energy security, reduce automobile emission pollution, ensure social sustainable development, improve the independent innovation ability of China’s automobile industry, and realize the leap-forward development of the automobile industry.
2. Specialty of Small Electric Bus
a, Main characteristics:
A small electric bus is suitable for commercial activities, department activities, journeys, small group outgoing and sightseeing reception and etc.
3. Environmental (Without pollution)
Small electric bus basically does not emit harmful gases during driving. In terms of energy conversion, electricity is also cleaner than directly burning fuel. According to the statistic from California Air Resources Board, after using electric transportation equipment extensively in Los Angeles, it has reduced hydrocarbons by 98 percent, carbon monoxide by 99 percent, and carbon dioxide reduced by a large margin. The empirical results show that the energy efficiency of it has exceeded gasoline engine cars, the electricity consumption of 100 miles is only about 1/3 of the cost of fuel buses.
At present, the only company in China that fully owns the research and development and production technology of AC frequency conversion electric sightseeing vehicles, the performance and core technology of its electric buses are in the leading position in the world, with an energy efficiency of up to 92%. Moreover, the electricity consumption per 100 miles is only 1/5 of that of ordinary fuel-powered buses. Moreover, it has the advantages of stable performance, short charging time, fast acceleration, long mileage, strong anti-overload ability, no burning motor, strong climbing power, which makes passengers feel more comfortable. There is no more maintenance during use, no need to add acid and water, and the battery has a long service life, generally three years
4. The energy ultilization efficiency is high and the energy diversification is possible to realize.
The energy utilization rate of a small electric bus is higher than the fuel vehicle, it will not consume any energy when short-time parking, meanwhile, a small electric bus can also recover the braking energy to charge the battery, in order to improve the energy utilization rate of the small electric bus to extend the driving range. On the other aspect, the electric energy on the battery of the small electric bus can get through many ways. Such as hydro energy, wind energy, nuclear energy, solar energy, thermal energy, tidal energy, natural gas, combustible ice, etc. In order to diversify the energy sources, reduce the dependence on oil, and improve the national energy security and national economic security.
5. Less Waste Heat Is Discharged
a. Normal internal combustion engine vehicles exhaust a large amount of waste heat during operation, which leads to the increase of ambient temperature and further influences the “heat island effect” in big cities. Small electric bus exhaust little or no heat exhaust, can reduce the city’s “heat island effect”.
b. Small Noise of small electric bus
The motor noise of a small electric bus is much lower than the internal combustion engine vehicles. Therefore, small electric bus will be more quite when working, and more environmental.
6. The traditional car structure is able to change
Because of motor miniaturization, it can be arranged in many parts of the body. So as to achieve different body structures, to meet the new user requirements and exterior requirements. The traditional gasoline vehicle could not meet these requirements due to engine limitations.
7. Basic Composition
A small electric bus consists of three parts: Electrical system, chassis, and body.
Three components: Battery, motor and electronic control.
8. Electrical System
Electrical system: Divided into two systems according to functions:
a, Power system – battery, motor and etc.
b, Control and auxiliary system – Electronic control, accelerator, switch, wiring harness, charger and etc.
Lead-acid batteries are still the main battery, some of the vehicles can install lithium-ion batteries or iron ion batteries. But the price is relatively expensive.
Power motor use more DC series excited motor, DC other excited motors, brushless motor, switched reluctance motor, AC asynchronous motor, etc., which DC series excited motor and DC other excited motors due to cheap, superior performance and other characteristics in the electric car has been widely used.
Chassis has been divided to four systems according to the chassis functions
① Driveline — clutch, gearbox, universal drive shaft device, main reducer, differential and half axle in the drive axle, etc.
② Driving system — serves as a link and load-bearing function. It mainly includes frame, axle, wheel, and suspension, etc.;
③ Steering system — including steering wheel, steering machine, and transmission rod, etc.;
④ Brake system — for speed control and parking. Including brake and brake control device
The body is consists of two parts: The front and the carriage.
The front is the position for the driver, generally can take the driver and co-driver.
The carriage is refitted according to the customer’s requirements, including their carriage configuration, materials, space design, and so on.
11. Maintenance of Small Electric Bus
The battery of a small electric bus is strictly prohibited to be in a status of losing power when stored. Power deficit status refers to the small electric bus does not charge in time after use. When the battery is stored in the status of power deficit, it is easy to appear sulfurization, lead sulfate crystals attached to the plate. Also, it will block the ion channel, resulting in sufficient charging, battery capacity decline. The longer the idle time in the status of power deficit, the heavier the battery damaged. Therefore, when the small electric bus is idle and not in use, it should be charged once a month to keep the battery in a healthy status.
In a word, regular checking will help you a lot when you using a small electric bus. If you want to know more maintenance methods of using small electric bus or you want to purchase one or be the agent of your country. Please feel free to contact us. Your inquiry will get a reply within 24 hours always.