12V23A battery

Analysis of technological breakthroughs in low-temperature performance of 12V23A battery

Low temperature is an obstacle to the promotion of electric vehicles in the northern and cold regions of my country, and it is also a headache for power battery companies. Overcoming the low-temperature resistance of power 12V23A battery has always been one of the key directions of the industry. Lithium batteries have made continuous breakthroughs in low-temperature performance, and are not afraid of cold weather! The impact of low-temperature performance of 12V23A battery Take 12V23A battery as an example. This type of battery has high safety and a long single-cell life, but its low-temperature performance is slightly worse than that of batteries with other technical systems. Low temperature has an impact on the positive and negative electrodes, electrolytes, and adhesives of lithium iron phosphate. For example, the positive electrode of lithium iron phosphate itself has poor electronic conductivity, and it is easy to produce polarization in low temperature environment, thereby reducing the battery capacity; under the influence of low temperature, the speed of graphite lithium insertion is reduced, and it is easy to precipitate metallic lithium on the surface of the negative electrode. If it is put into use after insufficient storage time after charging, the metallic lithium cannot be completely embedded in the graphite again, and some metallic lithium continues to exist on the surface of the negative electrode, which is very likely to form lithium dendrites, affecting battery safety; in low temperature environment, the viscosity of the electrolyte will increase, and the lithium ion migration impedance will also increase accordingly; in addition, in the production process of 12V23A battery, adhesives are also a very critical factor, and low temperature will also have a great impact on the performance of adhesives. Another problem caused by low temperature is that the charging time is extended at the user end. When charging at low temperature, the battery is easy to precipitate lithium, so before charging, the battery is generally heated slowly, and the battery temperature is raised to normal temperature before charging. To solve the problem of low temperature resistance of batteries, it is usually necessary to start from three aspects: battery materials, battery cell design and PACK manufacturing, to improve the low temperature charging and discharging performance and cycle life of lithium. Lithium iron phosphate battery low temperature performance has achieved a technological breakthrough. Weineng has been deeply involved in the field of special batteries for many years, especially in the field of ultra-low temperature battery technology, and has made continuous breakthroughs, becoming a strong competitor in the field of special batteries in China. The -45℃ ultra-low temperature lithium iron phosphate battery developed by it is a powerful weapon of Weineng in the special field. In the ultra-low temperature harsh environment of -45℃, the latest product of Shandong Weineng Environmental Protection Power Technology Co., Ltd. has attracted widespread attention from many industry insiders as soon as it was unveiled at CIBF2018, and once again demonstrated the "Weineng power" to the world. The lithium iron phosphate battery developed and produced by Weineng in cooperation with the Institute of Chemistry of the Chinese Academy of Sciences has achieved a major breakthrough in low temperature performance. It can still release more than 90% of the rated capacity at a low temperature of minus 45 degrees. This technology is at the leading domestic and international advanced level. The special ultra-low temperature lithium iron phosphate battery developed by Weineng has passed the extreme cold test. At present, the product is supplied in batches to the special aerospace field. It is unique in the field of high-quality power batteries and has become another major market competitive weapon and fist product of Weineng in the special field. Compared with power batteries, special 12V23A battery have higher requirements for product safety, reliability and low temperature resistance, and also have strict qualification requirements for enterprises. Tianneng has once again made new breakthroughs in lithium iron phosphate battery technology innovation, successfully overcame the technical bottleneck of 12V23A battery in low temperature, and obtained certification from the State Product Quality Supervision Bureau, which caused a strong response in the industry. According to Tianneng Group's lithium battery R&D personnel, the cost of diaphragm materials in 12V23A battery is very high, but the quality of the diaphragm affects the performance, life and reliability of lithium batteries. Tianneng technicians have successfully broken through the technical bottleneck of 12V23A battery by improving process formulas, optimizing structural design, and matching high-quality materials. The new generation of lithium batteries developed have been tested and not only have good performance in charge and discharge rates, but also have stronger advantages in acceleration performance, charging time, safety performance, etc., and also perform well in low-temperature discharge, releasing more than 80% of energy at minus 20 degrees Celsius, far exceeding the national standard of 60%. Tianneng Group has been committed to the research and development and production of lithium batteries as early as five years ago. Relying on Tianneng's national postdoctoral workstation and academician workstation, the independently developed lithium iron phosphate power battery has made breakthrough progress in the safety of large-capacity lithium-ion power batteries, positive and negative electrode materials, and electrolyte research: no fire, no combustion, and no explosion under extreme conditions of use such as extrusion, acupuncture, and short circuit. As a type of lithium battery, lithium titanate battery has excellent low-temperature resistance. The lithium titanate negative electrode material with spinel structure has a lithium insertion potential of about 1.5V, does not form lithium dendrites, and the volume strain is less than 1% during the charging and discharging process. Nano-sized lithium titanate batteries can be charged and discharged with large currents, achieving low-temperature fast charging while ensuring the durability and safety of the battery. Lithium titanate battery has excellent low-temperature resistance. Lithium titanate batteries have normal charging and discharging capabilities in the temperature range of -50~60℃, and have good low-temperature resistance. With its excellent low-temperature resistance, lithium titanate batteries have become a pioneer in promoting new energy vehicles in cold areas in my country. At present, many ternary lithium batteries also have the characteristics of low temperature resistance, and lithium titanate batteries are the best in low temperature resistance. The low temperature bottleneck in the promotion of electric vehicles will also be gradually solved. 12V23A battery have the advantages of high specific energy, high specific power, high energy conversion efficiency, and long cycle life, but they are currently difficult to discharge and charge at low temperatures. In low temperature environments, battery charging has certain risks. Therefore, industry insiders recommend that lithium-ion batteries should be avoided as much as possible when charging at low temperatures. When the battery must be charged at low temperatures, it is necessary to choose a small current (i.e. slow charging) to charge the lithium-ion battery as much as possible.

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