"Save My Child"
This is the cry of a mother of a child
April 25th
Shangluo, Shaanxi
Ms. Cai's 7-year-old son and 9-year-old daughter
Because of a fire
Extensive burns all over the body
Fortunately, the child's father rushed into the fire in time
Rescue the son and daughter from the fire
But both siblings were unconscious
Child's Dad:
"My baby's hand is gone. ”
Mother of the child:
"The electric car caught fire while charging,
When I ran over, the fire was already very strong,
The child called out to his mother inside,
My heart was broken. ”
understood
The cause of the fire was:
The e-bike accidentally caught fire while charging
The main causes of e-bike fires include:
The battery is overcharged and the battery cell is faulty
Battery line short circuit, etc
1. Experimental setup
The experiment was conducted in a laboratory in a multi-storey building, and the spread of the fire was reproduced in a real state.
The laboratory has five floors, and an electric bicycle is set up on the first floor to simulate its thermal runaway and cause a fire. Foam boards are set up on the 1st, 3rd and 5th floors to detect temperature and toxic gases on site.
2 Experiments begin
After the start of the experiment, the e-bike battery continued to heat up for the first 16 minutes, and it could catch fire at any time.
3 Electric bikes start to heat up
An open flame appeared at 16 minutes and 23 seconds, white smoke came out 10 seconds after the fire, and black smoke came out 50 seconds later, and the firefighters at the scene used a handheld thermal imager to detect that the temperature above the body exceeded 650 degrees Celsius. One minute after the fire, the body burned violently and the battery continued to explode.
A chimney effect is formed at the scene, and the smoke spreads upward. Seventy seconds after the fire, the upper space of the atrium quickly filled with smoke and gathered heat at the top, and the scorching smoke ignited the foam on the 5th floor.
According to the on-site harmful gas detector, the harmful gas quickly accumulates and reaches its peak.
4. Experimental effect
The experiment showed the characteristics of rapid fire starting, large smoke production and rapid heating of electric bicycles.
The e-bike caught fire quickly
The battery is explosive
That's why it's been emphasized
You can't push electric vehicles and bicycles into the house or into the hallway
You can't take the e-bike battery home to charge it
The e-bike battery cannot be changed without authorization
For your safety and the safety of others
Don't leave anything to chance
Finally, please keep the following one
Guide to the safe use of e-bikes
