Tesla has identified the cause of a Tesla Model S that was fire this in Shanghai in April. When this happened, fire reports spread rapidly over the Internet, leading to speculation of all kinds. In May, Tesla announced that they were going to investigate the cause of the fire.
The car manufacturer conducted its investigation with several Chinese and American experts. The joint analysis pored over information about the car's battery, installed software and history. Finally, the investigation found no fault in the system's design. Instead, Tesla says that a single battery mode fault led to the fire.
Tesla has recently pushed an update to revise the charging and thermal management settings of model S and model X. According to Tesla's statement, the update will help protect the battery and improve its life, reducing the likelihood of this happening again .
Tesla is not the only car manufacturer that has recently investigated battery safety in their vehicles. Chinese car manufacturer NIO conducted a similar investigation after three of its vehicles were recently burned in the country.
Just one day before Tesla's announcement, NIO announced that battery module failures were responsible for vehicle fires. The car manufacturer says that a module in the battery pack can in some cases push up against a voltage sample cable. NIO remembered just under 5,000 cars to stave off the problem.
Tesla's statement on Weibo can be found below:
A very crude Google translated version of this text into English:
Declaration on Shanghai vehicle accidents | On the evening of April 21, 2019, a Tesla Model S vehicle exploded in an underground car park in Shanghai. According to the complete surveillance video, at 20:30 that night, the vehicle showed an open flame after approx. 1 minute of smoke. After receiving the alarm, the fire center came to the scene to fight the fire. The accident did not cause personal injury.
After receiving the alarm message, Tesla immediately started responding to the highest level. The team sent the team to the first stage to set up a joint investigation team consisting of Chinese and US technical experts and leading teams to actively collaborate with relevant authorities to participate in the follow-up process. We worked with the real estate department to start the aftermath.
The joint investigation group conducted a comprehensive investigation and analysis. Through extensive investigations of batteries, software, production data, and historical data from the vehicle, we did not find system errors and discovered that the individual event was caused by a single battery modular error on the front of the vehicle. After the first appearance of smoke, the battery safety system, like the design, controls the fire in a particular module in the battery and radiates the heat on the outside of the cabin and outside the module, leaving the rest of the battery intact. Personnel in the car should have time to leave the car safely.
Customer safety is a principle that Tesla adds. Due to rigorous and careful considerations, we have updated the model S and Model X vehicle charging and thermostatic systems through the OTA air upgrade to further protect battery wells to improve battery life.
Although the probability of an accident with Tesla electric vehicles is significantly lower than that of a petrol car, we will continue to pursue the target of "O accident rate". We will continue to do our utmost to take steps to resolve the issue for the owner and to ensure vehicle safety. If the owner finds a problem, please feel free to contact our customer service hotline 400-910-0707
Source: The Verge, Reuters