Defects In Tesla Battery Packs Can Cause Fires. Investigation By NHTSA

- Nov 20, 2019-

According to CNBC, according to a notice issued by the National Highway Traffic Safety Administration (NHTSA), the agency has investigated the possible defects of the ModelS and ModelX battery packs, which may lead to “non-crash fires”.

NHTSA said they are evaluating whether Tesla should recall 2,000 electric vehicles in May instead of releasing software upgrades to fix potential defects that could cause a battery fire. The agency also said it has launched a review to evaluate a software upgrade for the Models and ModelX models of Tesla's 2012-2019 version of the petition.

In May of this year, the Tesla ModelS model had three spontaneous combustion events without any accidents in a month. Subsequently, Tesla released a BMS software update to modify the "Charge and Thermal Management Settings". At the same time, Tesla modified the management settings on the ModelS and ModelX models by means of over-the-air (OTA) software to help further protect the battery and improve the battery. life.

However, after this software update, some car owners found that the cruising range has dropped. It is understood that software updates have reduced the mileage of affected vehicles by 25 miles or more per charge.

The owner said in a petition that Tesla set software-induced limits on battery charging and made other changes to the battery charging speed. It also cited more than a dozen reports of Tesla's fires in the past six years.

In August, Tesla admitted that "a small number of older ModelS and ModelX owners may have noticed that after the software upgrade to improve battery life, they have a slightly shorter cruising range when charging to the maximum state of charge. ""

The lawyer representing the owner said in a petition that the software update did not solve the non-collisional fire problem in the affected battery pack. Tesla should have notified NHTSA of the existence of a potential defect and conducted a safety recall.

The lawyer wrote in a letter to the US Department of Transportation and the US National Highway Traffic Safety Administration: "Tesla is using wireless software updates to cover up and mask a potentially widespread hazard of its vehicle battery."

After investigating key issues related to battery fires and upgrades, the US National Highway Traffic Safety Administration either decided to conduct a recall – which would put Tesla with a heavy financial burden and could damage its reputation – or it would not be necessary In the case of a recall, the results of the investigation need to be published in the Federal Register.

Currently, the National Transportation Safety Board and the National Highway Traffic Safety Administration are investigating several battery fire incidents in Tesla. NHTSA has previously investigated other battery and charging system issues for Tesla Motors.

In response to this report, Tesla’s representative did not respond to requests for comment.

Tesla is working hard to reduce the cost of batteries. In the past two years, the company's super battery plant in Gigafactory in Nigaada has encountered difficulties in waste management and quality control.

In 2016, Tesla CEO Elon Musk said he believes that most of the security complaints filed with NHTSA are “fraudulent” and suggest that these complaints are a widespread barrier to his electric car company. Part of the conspiracy.

Tesla's new "smart call" feature (which allows drivers to drive from a parking space to where they are standing without a driver) also caught the attention of NHTSA this week. The agency said it has noticed some incident reports involving the "smart summons" feature, but declined to confirm whether a formal investigation into the function was conducted.发送反馈历史记录