SMM7 15: June, China's narrow passenger car sales reached 1766040, up 11.6% from the previous month, up 4.9% from the same period last year, the car market after 12 months to meet the positive growth. Half of 2019 is over, and recent data show that passenger car sales have ended nearly 12 months of decline, showing positive growth for the first time in 12 months. Sales of new energy vehicles in China rose 49.6% from January to June compared with the same period last year, and sales of new energy vehicles in China rose 80% in June from a year earlier, according to CAAC data. Among them, sales of new energy vehicles from a number of new energy vehicle manufacturers have increased significantly.

With the good performance of the new energy vehicle market in the first half of the year, there are many problems in the new energy vehicle itself.

On April 22, a Weilai ES8 in Xi'an caught fire and burst into the first fire.

Before long, Weilai car accidents occurred one after another, May 16 Shanghai another ES8 smoke, June 14, Wuhan, Hubei Province, another Weilai ES8 spontaneous combustion.

On the morning of April 24, a BYD E5 in Wuhan also ignited spontaneously, and the fire began to spread from the rear of the car. Fortunately, even if it was put out, it did not cause serious damage and casualties.

On June 19, a Changan new energy vehicle ignited spontaneously in Chongqing, and workers at the scene used water to cool the smoky vehicle. Changan car workers said that when smoking, the head is inserted.

Four days before the Changan car spontaneous combustion accident in Chongqing, Lifan new energy car spontaneous combustion occurred in the same place. However, Lifan shifted the responsibility to the charging pile.

A series of spontaneous combustion incidents, not to mention whether the cause of spontaneous combustion is beneficial to manufacturers, at least in terms of burning fire may deter consumers. After the spontaneous combustion of new energy vehicles, Xin Guobin, vice minister of industry and information technology, said at the 2019 World New Energy vehicle Conference that Xin Guobin, vice minister of industry and information technology, was leading the preparation of the new energy vehicle industry plan for 2021 to 2035 at the 2019 World New Energy vehicle Congress. Information on the safety of new energy vehicles mentions that the Ministry of Industry and Information Technology has recently taken the lead in further requiring industry-wide safety inspections and guiding the organization in the development of safety guidelines for new energy vehicles. Prior to this, the Ministry of Industry and Information Technology also issued a "notice on the investigation of safety risks of new energy vehicles." The notice clearly requires the waterproof protection of sold vehicles, stock vehicles, high-voltage wiring harness, vehicle collision, vehicle power battery, vehicle charging device, battery box, mechanical parts and vulnerable parts to carry out safety hidden trouble investigation work. For enterprises that have found that there are problems such as failure to carry out investigation, false reporting, fraud and so on, the harshest punishment will be removed from the recommended model catalogue for the promotion and application of new energy vehicles.

After the Ministry of Industry and Information Technology announced on June 27, 2019, Weilai Motor announced that from June 27, 2019, the recall part of the Weilai ES8 electric vehicles carrying power battery packs produced between April 2, 2018 and October 19, 2018, a total of 4803 vehicles.

BAIC New Energy vehicle Changzhou Co., Ltd. has filed the recall plan with the State Administration of Market Supervision and Administration in accordance with the requirements of the regulations on the Administration of recall of defective Automobile products and the measures for the implementation of the regulations on the Administration of recall of defective Automobile products. Decides to recall a total of 1389 Weiwang 407 EV series electric van vehicles manufactured from 11 June 2018 to 30 November 2018 with effect from 13 July 2019.

As far as 2018 is concerned, there were more than 40 fires in new energy vehicles, and 121400 defective vehicles involving 33 models were recalled, mainly due to failures in electronic control, machinery, electrical appliances and battery systems. In the first half of 2019, more than 120000 new energy vehicles were recalled, and nearly half of the more than 120000 pure electric vehicles were caused by the three power problems of new energy vehicles.

The main cause of spontaneous combustion comes from the battery system. Battery as an indispensable carrier of energy storage, battery industry is related to chemistry, machinery industry, electronic control and so on. The key of the battery lies in the cell, the most important material of the cell is the positive and negative electrode, diaphragm, electrolyte. Among them, the cathode materials are widely known as lithium iron phosphate, lithium cobalt, lithium manganate, ternary, high nickel.

The use of power battery has been about 20 years, after layers of iteration. In recent years, electric vehicles with high energy density and strong endurance have attracted much attention, and some batteries with high density have been used. However, the materials of these lithium batteries are more likely to heat up during charge and discharge, and the probability of thermal loss of control increases significantly with the increase of energy density. At the same time, the car collision will cause the battery pack to deform, causing the battery diaphragm to be torn and internal short circuit, and easily igniting due to the leakage of flammable electrolytes. Ectopic or improperly assembled batteries can cause the battery to overheat and be dangerous.

SMM believes that although facing the depression of the automobile market, while extending the mileage and improving the competitiveness of their brands, new energy vehicle manufacturers should pay more attention to the safety of the car's core components, especially in recent years, the development process of the high nickel triple is relatively fast, it is inevitable that people worry whether the corresponding safety facilities have kept up. If the main body collapses, it will be too pale to talk about improving the rest. Moreover, the frequent recall of new energy vehicles, on the one hand, will devalue the automobile brand, on the other hand, it will also have a great impact on the demand of the new energy vehicle industry.

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