- Equipped with multiple patented technologies, Yutong YESS is set to bring the 
EV safety standard to the next level. 

On August 31st, Yutong Power Battery Safety Protection Standard Conference & 
Power Battery Safety Test was streamed live worldwide, unveiling its latest EV 
bus safety technology, the YESS - Yutong Electric & Battery Safety Protection 
Standards. It will be the world's first EV safety technology to be applied in 
batches on commercial vehicles.

https://www.youtube.com/watch?v=yaYOJ3QApBQ

YESS offers 5 layers of protections– whole-vehicle security, system security, 
box security, component security and monitoring security, realizing 3 major 
improvements on safety level, all-weather capability and road adaptability. 

Researches suggested that over 30% of EV battery failures were caused by 
external damages. Therefore, instead of just protecting the battery, YESS 
covers the whole vehicle and uses a "Cage type" structure to surround the 
battery with a high-strength fence to cushion such collisions. 

As for internal failures like ISC and TR, the system security of YESS applies 
an industry first nitrogen protection technology to completely cut off the 
oxygen in the battery box to avoid combustion.

When it comes to the separation of external and internal safety hazards, the 
box security of YESS ensures a multi-layered thermal-electrical coupling 
protection. 

The component security comes in handy under extreme conditions like high 
voltage. It adapts the commercial-vehicle-suitable multi-package liquid thermal 
technology to build a heating-parts-free battery box.

YESS is also about real-time monitoring. It provides an all-time, all-fields 
monitor over the battery conditions, and a mobile app to enable the intelligent 
cloud management.

Confident in this technology, Yutong conducted a battery safety test show 
during the live stream, putting the YESS-equipped battery pack under extreme 
test conditions of overheating and overcharging to prove its safety and 
stability.

Stepping into the field of new energy vehicles in 2008, Yutong has sold over 
150,000 units worldwide with the total operating mileage reaching 
24,800,000,000km. Determined to mitigate the concerns over EV safety, Yutong 
has shifted the battery safety into the next gear with YESS – an all-around 
integrated safety solution that focuses on the whole vehicle as a completed 
system.

Yutong is determined to continue upgrading its technology and updating YESS to 
guard passengers' every journey on Yutong EV buses with safety, sustainability 
and comfortability.

SOURCE  Yutong Bus Co., Ltd.