Yutong, leader of new energy buses

Yutong always upholds the concept of environmental protection and actively leads the development of new energy buses. At present, the company has fully mastered a number of core technologies of new energy buses. Yutong innovatively launched hybrid and pure electric bus series products, and the sales volume of electric buses.

Coverage

> 310 cities

Annual sales volume

> 12,414 units

Total sales volume

> 170,000 units

For the sake of full electric vehicle safety, we have gone farther than before

Improving the safety of vehicles become our most important and consistent pursuit. We have accumulated a wealth of experience in the safety technology of electric vehicles and have made many breakthroughs, which have been successfully applied in our products.

3S Safety Technology

Yutong has systematically summarized the technical safety requirements of new energy buses in various operating environments, and proposed "3S Safety Technologies", which is the latest safety technology of Yutong new energy buses. In order to achieve the three safety goals of “water resistance, fire resistance and electric shock resistance” of the "3S Safety Technologies", Yutong has deeply studied the material safety, sealing safety and structural safety technologies, and established the safety solutions regarding development & manufacturing, transportation & storage, usage & maintenance, operation & monitoring, etc., comprehensively enhancing the overall safety level of electric buses.

• Water resistance

  The protection level reaches IP6K9K. Works normally under 2m depth water for 72 hours.

• Fire resistance

  Buffer spaces for high-voltage electrical components are reserved at the front and rear of the vehicle. Furthermore, the anti-crash structure of vehicle body is enhanced and the high-voltage parts will not be out of function after being collided. High flame retardant grade materials are adopted for the parts of full electric powertrain assemblies. Fully spatial and thermal isolation between battery cabin and passenger compartment poses no threat to passengers even if the batteries catch fire.

• Electric shock resistance

  No bare wires, terminals or connecting units; Live parts of power circuit system are designed to prevent direct contact; Real-time monitoring system of insulation resistance can trigger visual and acoustic alarm and automatically cut off the power when the insulation resistance value is lower than the warning line.

• Battery safety

  The batteries have gone through a series of destructive tests such as high temperature, short circuit, squeeze, soak, overcharge, puncture, etc. The battery management system (BMS) can monitor the temperature, voltage, current and electric quantity of each cell, and also has corresponding warning functions.

• Recharging safety

  Compared to AC recharging, the DC recharging way used by Yutong is much safer, since it is isolated from the grid, and meanwhile has the active and passive protection mechanisms. The max. leakage current of DC recharging is 10mA while the max. leakage current of AC recharging can reach high up to 30mA.

• Safety monitoring

  Through monitoring the key components, the functions like safety accident prevention, battery life prediction, fault classification warning and so on can be achieved.