YuTong Bus / Coach
YuTong New Energy Bus
As a world’s major bus supplier whose annual sales volume of large and medium-sized buses and coaches ranked first worldwide,Yutong covers the main markets in six continents.Yutong believes that the core of the bus transportation development is to provide the society and transportation operators with sustainable development products and services that meet the overall interests and needs.
- Full electric bus
- Fuel cell buses
- Bus development and manufacturing
- Recharging facility construction
- Informationized management operation
- Financing & procurement services
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.
The protection level of the full electric powertrain system meets IP68 requirements and the fording depth of whole vehicles reaches 500mm.
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.
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.
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.
Through monitoring the key components, the functions like safety accident prevention, battery life prediction, fault classification warning and so on can be achieved.