Lithium-ion battery has advantages of high working voltage, high specific energy, wide working temperature range, stable discharge, that is a focus in the study of chemical power source in recent years The research about lithium-ion battery began in the late 1950s, its development has experienced 3 periods of lithium batteries, rechargeable lithium battery, and lithium-ion rechargeable battery.

Along with the constant advocate for energy conservation and environmental protection in our country, more and more energy conservation and environmental protection device is developed In battery market, whether it's dynamic type lithium battery or storage battery, have gradually been replaced by lithium-ion battery.

How big is the fire hazard of the “five-class car”? Yesterday morning, the Guangzhou Municipal Public Security Bureau fire brigade, trafficspecial detachment and Sun Yat-Sen University Fire Science and Technology Key Laboratory and Ping an Guangzhou Volunteer Service Corps conducted an electric vehicle fire safety hazard demonstration experiment in an abandoned building in Tianhe The experimental scene of the fire caused by the burning of electric vehicles on the spot and the explosion of the battery was shocking, which made people realize the power of the hazards caused by the fire hazards of the “five-class car”.

It is understood that iPhone8, iPhone8Plus is still using lithium ion data, iPhone8 battery capacity is 1821 MAH, iPhone8Plus battery capacity is 2675 MAH, thickness 271mm.

The central issue: the reality of electric bicycles, the advantages of large capacitors on electric bicycles and the application of power stations in super-capacitor electric bicycles The large capacitor has a large specific power, and its characteristics are: when charging, the charging amount is large, and the charging is fast; when discharging, the discharge amount is large, the discharge is fast, the climbing is strong, and the battery is 30 times larger than the lead-acid battery, which is the most important electric vehicle performance Ultra-large capacitors are more powerful than electric ones.

A block diagram of a high efficiency solution is shown where the load is a device that requires a stable input voltage (33V, 5V, 12V, etc.

Guide: After the electric vehicle mileage is refreshed again and again, it means that the energy density of the battery is also increasing again and again The breakthrough in technology is certainly good, but is the energy density of the battery as high as possible? Is there an optimal value? Recently, BAIC New Energy launched the EU400 with a driving range of 460km.

Mok, chief analyst of True Lithium Research, expects that lithium iron phosphate battery will completely withdraw from the pure electric passenger vehicle market in 2019, and the proportion of pure electric passenger cars will also decline year by year, and its focus shifts to the low-speed electric vehicle market, but the market also will face strong competition from ternary batteries [Editor's note] Positive material weekly report, China Battery Network (micro-number: mybattery) and domestic well-known enterprises - Rongbai Holdings (micro-number: rongbaitouzi) under the jurisdiction of the company - Rongbai lithium battery jointly launched the positive material information weekly report (per Launched on Monday, it belongs to the “Battery Think Tank” column, which aims to bring more objective understanding and analysis to the industry through more valuable data, reports or information, and to create different perspectives and thinking for the industry, and we will Readers, industry, and company needs to launch in-depth research and project docking, and introduce foreign advanced technology and appropriate capital to promote the commercial application process of China's cathode materials industry.

But what I want to emphasize is that the results of these forward-looking technologies are still quite a distance from industrialization Of course, this is not to say that the research of domestic experts is divorced from industrialization, but that lithium battery itself is far from the next generation of battery technology.

In the current field of new energy passenger vehicles, ternary batteries occupy a dominant position due to the advantages of energy density, and lithium iron phosphate batteries can only retreat to passenger cars, logistics vehicles and other fields However, passenger cars are recognized as the most growth potential and the largest market segment in the industry.