Dr. Xu Huanxin, chief operating officer of Weimar Motors, once said that battery technology is actually a relatively open thing, and it is not certain who will die in the future. Therefore, for new battery technologies such as solid-state batteries, the most appropriate method is to conduct exploratory cooperation with related companies.

　　Toyota, which has always been low-key and conservative, has entered into electrification with such a big fanfare. I personally believe that its greatest strength is its global leadership in solid-state batteries. Toyota has been researching solid-state batteries for nearly 20 years. If solid-state batteries are used on a large scale, I personally believe that it must have started with Toyota.　　 In China, the layout of solid-state batteries by car companies is very small. On the one hand, the high R&D cost and long effective period of solid-state batteries are too burdensome for car companies; on the other hand, the industrialization of forward-looking technologies is also extremely risky.

　　Dr. Xu Huanxin, chief operating officer of Weimar Motors, once said that battery technology is actually a relatively open thing, and it is not certain who will die in the future. Therefore, for new battery technologies such as solid-state batteries, the most appropriate method is to conduct exploratory cooperation with related companies.

　　In fact, the research direction of battery technology is indeed very extensive. It is only this year that frequent solid-state battery breakthroughs have greatly increased the appearance rate of solid-state batteries. Even solid-state batteries themselves have many branches, but their essence is , All use solid electrolytes to solve battery safety issues.

　　Let’s take a look at the new technologies and major events in the lithium battery industry.

　　Tesla developed battery preheating technology to improve battery low temperature performance

　　Tesla has shown to consumers that when the temperature of the battery is too low, part of its electric energy will be locked and cannot be used, which reduces the car's cruising range. People familiar with Tesla's software updates revealed that Tesla is studying the battery warm-up function. This function will help the car overcome the disadvantages of low battery temperature and unlock "part of the battery energy that is locked because of the temperature too low."

　　In the 2017.50 car software update recently released by Tesla, as well as an upcoming mobile application update, Tesla has preset the battery warm-up function. After this function is launched in the future, Tesla owners will be able to activate the "battery preheating" function through mobile applications when the electric vehicle is turned on.

　　Tesla owners can use this app to warm up the car. Car owners can use this app to warm up the battery pack in the future. Tesla hopes to achieve the function of preheating the battery while charging, which will help maximize battery efficiency in severe cold weather and ensure that the electric vehicle reaches the ideal cruising range when driving. From the point of view of Tesla's research and development of battery preheating function, the battery management system still has a lot of room for improvement and can bring unexpected surprises.

　　Comment: Actually, think about it carefully, the battery is really a delicate product. Energy density, safety, charging speed, power density, and temperature adaptability have never really been solved. At present, various technological innovations in the industry often achieve a single performance breakthrough at the expense of other performance. And this kind of preheating by Tesla is actually a compelling choice under the dilemma of the temperature-adaptability of lithium batteries. This limitation makes it easy to question whether lithium batteries are the best choice for electric vehicles. This is also the reason why many people in the industry believe that fuel cells are the hope of electrification, and lithium batteries are only auxiliary power.

　　The service life of the new hybrid energy storage system doubles

　　Rutronik and the Department of Electronic Technology of Zwickau University of Applied Sciences have jointly developed a new hybrid energy storage system (HESS). It is developed based on a combination of lithium-ion batteries and double-layer capacitors (UltraCaps) (also known as super capacitors). This hybrid system combines a lower impedance EDLC and a "higher" impedance battery through an innovative topology to obtain the most suitable system solution.

　　This topology uses ultra-fast power MOS switches for full digital control, which can achieve nearly any form of adaptive matching. Through this system, the service life of lithium-ion batteries can be doubled. This power management system can also be adjusted for use in light electric vehicles (LEVs) to achieve higher reliability and low R&D costs.

　　In addition, while the battery provides stable energy for continuous operation, the super capacitor will receive the peak current and voltage that appear in a short period of time. The battery discharge current will be limited to its rated current, so the battery will not leave its optimal operating range under any circumstances. By adopting this "protection operation" method, its service life can be extended by up to 1 times. In addition, the internal temperature rise of the battery is small or there is no heating phenomenon, so that the service life can be increased again.

　　Comment: The combination of lithium batteries and capacitors has always been the direction of researchers. Capacitors have the characteristics of high power and long life, but their specific energy is very low. Therefore, in combination with lithium batteries, they can achieve the characteristics of high specific energy, high power and long life. In fact, the author personally is very optimistic about similar hybrids, because whether it is supercapacitors, lithium batteries or fuel cells, there are drawbacks that are theoretically difficult to overcome, so hybrids can solve these pains well, such as: fuel cell + power type lithium battery.

　　BMW and U.S. company cooperate to develop solid-state batteries

　　Recently, it was learned from foreign media that BMW has announced a partnership with SolidPower, an American solid-state battery company, to develop next-generation solid-state batteries for electric vehicles. According to reports, BMW is currently exploring issues such as the durability of car batteries. After this cooperation, it is expected to start producing a new generation of solid-state batteries before 2026.

　　SolidPower was established in 2012 and has connections with the University of Colorado at Boulder. The company has its own prototype assembly, small battery production and material synthesis capabilities. In addition, SolidPower also stated that the company is currently a leader in the solid-state battery technology industry, and its products are among the best in terms of safety and reliability.

　　According to earlier news, this company has mixed high-capacity metal lithium negative electrodes in lithium batteries and created a brand-new solid-state battery. Under the same weight, its power is 2-that of traditional lithium batteries. 3 times. If solid-state batteries can be mass-produced and applied to electric vehicles, it will greatly improve the range and power performance of electric vehicles. However, the cost of solid-state batteries will be much higher than that of liquid batteries. At present, major car companies have successively increased investment in research and development of solid-state battery technology with low cost and high energy density.

　　Comment: In fact, BMW is not researching solid-state batteries in a day or two. There have been reports before that BMW announced mass production of solid-state batteries in 2026. However, to be honest, compared to its rival Toyota, BMW's progress in solid-state batteries is more than a bit behind, and there is no way to quickly improve the level of technology than cooperation. Especially for car companies, the application of technology is better than the technology itself. More important. As for BMW's cooperation with SolidPower of the United States this time, it is not without anxious mentality in it.