L822 battery.Electric vehicle battery safety becomes focus, Tesla develops its own lithium battery

　　Electric vehicle battery safety becomes focus, Tesla develops its own lithium battery

　　Last weekend, Tesla (TSLA) announced the results of the investigation into the spontaneous combustion incident in Shanghai, saying that it was a single battery module failure. At the same time, Tesla is stepping up the development of its own batteries.

　　In the same week, NIO announced that it would recall its ES8 electric car due to issues related to battery modules.

　　In this regard, industry experts told China Business News that at present, electric vehicle companies and battery suppliers have both technical cooperation and business-level competition.

　　Tesla's latest statement stated that the Tesla joint investigation team has investigated and analyzed the vehicle's battery, software, production data and vehicle historical data, but the investigation did not find any system defects. Preliminary results show that the individual accident was Caused by a failure of a single battery module located at the front of the vehicle.

　　Japanese battery manufacturer Panasonic supplies batteries to Tesla, but not modules.

　　Tesla's statement also said that the company has modified the charging and thermal management settings of Model S and Model X vehicles through OTA software updates to help further protect the battery and extend battery life.

　　Regarding the Tesla spontaneous combustion incident that has attracted much attention, Shi Shuai, an electric vehicle battery analyst and director of Roland Berger, told China Business News that from a narrow technical and probability perspective, Tesla has experienced several generations of A failure of a relatively mature battery product for a car model is an accidental phenomenon, and consumers do not need to panic.

　　However, Shi Shuai also pointed out that from a broader perspective, it is not surprising that new car manufacturers have quality problems compared to traditional car companies. Because first of all, the compatibility of the independent design parts of emerging car companies represented by electric car companies with supplier products has yet to be tested, and independent research and development capabilities still need to be iterated. In addition, electric vehicles mostly use customized battery module designs, and the quality stability also takes time to verify.

　　Coincidentally, just last Thursday, NIO, a representative of China's new car-making forces, also announced the recall of 4,803 ES8 electric vehicles equipped with power battery packs produced between April 2 and October 19, 2018. In "About Its "partners" were mentioned in "Notes on Several Problems with the Battery Recall". It was later confirmed that the supplier of the NEV-P50 module of the ES8 that needs to be recalled is CATL, which currently ranks first in domestic power battery supply, and the one that integrates the battery pack is NIO itself.

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