Tesla batteries reignited after a Mountain View fire.

On highway 101 in a tesla X fire accident happens, the sixth day, a 38-year-old SanMateo man seriously injured, and vehicle's high pressure lithium ion batteries to sit on a trailer floor rekindled. Mountain fire departs.

The enlightenment was included in the last month by mountain viewing fire chief Juan Diaz wrote a memo safety, and by KTVU2 reported for the first time.

On Thursday, Diaz told this newspaper, he released on April 5th, memo to protect his department firefighters in dealing with the future of electric vehicles of fire. When the neighboring department contact mountain company is tesla's experience and lessons of the accident, he Shared the memo.

"We spoke about the challenges we face," said Diaz. "This is a kind of high voltage direct current (dc), may lead to fatal shocks."

The national transportation safety board is investigating and three other highway 101 crash tesla accidents, including in Florida on Tuesday in a hot type 2014 S car accident, and led to the deaths of two youth. Is also under investigation: a S type car crashed in January in culver city, near a fire truck, according to reports, the driver said at the time the autopilot is in use.It is a kind of model X study battery fire, it's on the drive into garage LakeForest family in August.

Mountain fire department safety report on March 23, details the mountain firefighters faced a tesla X crashed near highway 101, no. 85 on the elevated overpass ramp concrete barrier. The driver Walter Huang was killed in a car accident. According to Tesla, the car battery suffered unprecedented destruction.

On the company website, tesla wrote: "serious reason lies in the plane crash, the shock absorber is a kind of to reduce to the concrete driveway separators of the impact of highway safety barrier, in before the accident was not been demolished or smash replacement.

The company wrote in a blog post: "we have never seen in any other collapse X of this damage.

Tesla also reported that the car's autopilot function in a plane crash when activated.

Diaz said that his department deal with several electric vehicle fire accident, but that never happened "the scale of the accident.

In the memo, Diaz said damaged ion battery is in after add water still keep current status, the damaged cells of the risk of electric shock "because many of the battery and power lines are exposed". He also said that the "short circuit when the battery is damaged in the collision inside the circuit of the incident, the cells in the process of known as" thermal runaway "continue to generate heat.

Diaz said that during the thermal runaway events, temperatures may exceed 900 degrees Fahrenheit.

"This is what we experience in the field," said Diaz. "This is the reason why we call it the vehicle manufacturers."

The accident on the same day, tesla engineers remove about 25% of the battery. About five and a half hours after the accident, the fire department to determine X plane safe enough, can be towed away. Mountain firefighters will be escorted to the trailer yard, in case the battery rekindled.

Battery in lit again twice in the day of the accident, six days after again lit again in March 29.After two weeks, in order to avoid more fire, the NTSB and tesla battery step-down to completely power cuts, diaz wrote in the memo.

"We are very familiar with and realized that the lithium ion battery have been damaged is likely to reignite," diaz said." Battery overheat. This is not a surprising event."

Wrote on the company website, tesla, the battery "design in very rare cases is the purpose of a fire, it will be slow to spread, make passengers have enough time to leave the car. According to witnesses, it seems like what is happening here, because we know that in May cause fire risk, there is no X. So serious collisions may result in fire, whatever models, and Tesla billions of miles, according to data from the actual driving a car in the United States than Tesla motors five times higher than that of the possibility of a fire."

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