18650 battery bulk.How to "preserve" power batteries? Whose solution is most effective?

　　Passive protection is valued, carbon fiber plastic protects Weilai

　　After this website interviewed relevant experts to explore the story behind the spontaneous combustion incident of electric vehicle batteries, a statement disclosed by SGL Carbon on its official website attracted our attention. The statement said that the company will cooperate with Weilai Automobile to produce power battery casings made of carbon fiber plastic, which is 40% lighter than aluminum alloy materials of the same volume and has higher strength. More importantly, this case will support more OEM solution products and better support NIO’s battery replacement plan.

　　SGL Carbon previously disclosed on its official website a statement on its cooperation with NIO and a sample of the power battery casing it developed.

　　After Weilai disclosed an investigation report that its ES8 model spontaneously ignited while charging during maintenance at a Xi'an 4S store on April 22, the issue of passive protection of electric vehicle power batteries has attracted widespread attention from electric vehicle consumers and practitioners. Previously, the ES8 power battery and its cooling plate had been impacted, causing a short circuit and even catching fire. NIO's cooperation with SGL aims to improve the power battery casing to a higher strength and lighter casing, which will effectively improve the passive safety of electric vehicle power batteries. This coincides with the views of experts we interviewed before, but the methods adopted are different. The experts’ view is to use aerogel for passive protection of batteries.

　　Electric cars are all over the world, and battery recycling is hotly discussed

　　While Weilai has launched measures to improve the passive safety of power batteries, other car companies have also elevated power battery recycling to a strategic position. Volkswagen will start recycling 1,200 tons of batteries at recycling centers in Germany in 2020. This is closely related to Volkswagen’s global electric vehicle layout. In our country, Volkswagen has launched two electric vehicles, e-Golf and e-Bora. According to Volkswagen's previously announced plan, the company will produce 1 million electric vehicles per year by 2025, and the electric vehicle power batteries produced by the company have a service life of 10-15 years. After the power of these batteries has significantly weakened, Volkswagen remanufactured some of the batteries into remote charging stations or home energy storage devices, while other batteries were disassembled, the rare metals contained in them were extracted, and the batteries were remanufactured.

　　Volkswagen releases electric car renderings

　　With the popularization of electric vehicles in my country, especially the development of bus electrification across the country, the linkage effect between my country's battery recycling companies and OEMs will also be fully demonstrated. With the strong promotion of national standards such as "Recycling and Dismantling Specifications of Used Batteries" and "Remaining Energy Testing of Used Battery Recycling", as well as the local subsidy policy of "Shenzhen 2018 Financial Support Policy for the Promotion and Application of New Energy Vehicles" Driven by Hunan Bump and BMW, GEM and BYD, as well as BAIC Penglong, Ganzhou Haopeng and BAIC New Energy, Guanghua Technology has quickly established partnerships with Guangxi Huaao, Nanjing Jinlong, Chery Wanda, and Wuzhoulong Automobile in a short period of time. Establish partnerships with many car companies. Like Volkswagen, these power battery recycling companies will make great achievements in the field of rare metal recycling of scrapped power batteries. It is reported that dismantling and extracting lithium, cobalt, nickel, manganese, copper, aluminum, graphite, separators and other materials in power batteries in my country can theoretically achieve a profit of 42,900 yuan/ton. According to incomplete statistics, the cumulative electric energy of scrapped electric vehicle power batteries in my country will exceed 25GWh in 2020. Faced with such a huge amount of scrapped batteries, the "rich ore" effect of this market is highlighted. It has become an urgent problem in the industry to prevent some power batteries that have reached the scrap standard from being simply refurbished by unscrupulous practitioners and then flowing into the market as qualified products, thereby causing greater risks of spontaneous combustion or more serious accidents.

　　The spontaneous combustion, recycling and remanufacturing of electric vehicle power batteries will become a hot topic in the entire automotive field as the popularity of electric vehicles accelerates globally. At present, active protection of power batteries may become an important measure to control spontaneous combustion of the entire vehicle caused by internal short circuits in the power battery. In addition, the regulation of the power battery recycling industry and the reasonable mining of industrial "rich ores" have become issues that require urgent attention in the entire electric vehicle industry and even the circular economy field. With the advancement of technology, the electric vehicle industry will also be upgraded. We expect that existing power batteries can be recycled and processed more properly, and more new energy storage materials will not only solve the problem of electric vehicle mileage concerns, but also improve safety. Continuously improve, and try to eliminate consumers' worries about electric vehicles as much as possible.

Read recommendations:

501825 180mAh 3.7V

How to set the ratio of positive and negative electrodes for lithium batteries?AG10 battery

What is the working principle of lithium batteries?

3.7 volt 18650 lithium battery

AG6 battery