Tesla Inc. said a single battery module caused a car to catch fire in Shanghai and that it has revised vehicle settings to further protect batteries following an investigation into the incident.
The company said in a statement Friday posted on its Weibo social media account that the joint investigation team had conducted a probe and analysis of the battery, software, manufacturing data and vehicle history.
The investigation found no system defect, and the initial findings show the incident was caused by a single battery module located at the front of the vehicle, Tesla said.
Japanese battery manufacturer Panasonic supplies Tesla with battery cells, but not modules, which are a group of cells joined together.
The company has revised the charge and thermal management settings on Model S and Model X vehicles via an over-the-air software update, to help further protect the battery and improve battery longevity, the statement said.
A parked Tesla Model S caught fire in Shanghai on April 21.
Tesla has said its EVs are about 10 times less likely to experience a fire than gasoline-powered cars.
Tesla's local competitor Nio Inc. said on Weibo on Thursday that some battery modules in its cars might have safety issues as well, and that it would recall 4,803 units after three fire incidents in China.
Safety of electric vehicles is a growing issue in China, the world's largest new energy vehicle market, where 1.3 million NEVs were sold last year.
China's industry ministry asked carmakers this month to carry out safety investigations on waterproof protection, high-voltage harnesses, in-vehicle charging devices, and battery boxes in their cars.