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1800mah 18650 battery manufacturers interpret research on new high-energy-density power 1800mah 18650 battery technology
1800mah 18650 battery manufacturers interpret research on new high-energy-density power 1800mah 18650 battery technology. As the cruising range of electric vehicles increases and national subsidies gradually decrease, the energy density requirements for power batteries are getting higher and higher. Power 1800mah 18650 battery technology needs to overcome obstacles such as short cruising range, low safety, long charging time, and high battery cost. To support the development of the electric vehicle industry. Developing high-energy-density power batteries and improving the cruising range of electric vehicles will be a hot topic in industry research for a long time to come. The following 1800mah 18650 battery manufacturers explain the research on new high energy density power 1800mah 18650 battery technology.
Research on new high energy density power 1800mah 18650 battery technology
Through research in the past 10 years, in terms of high-energy-density lithium batteries, high-capacity Si anodes are the preferred anode materials, high-capacity lithium-rich phase layered composite structural materials, high-voltage spinel Ni-Mn materials, layered high Nickel ternary materials are more promising cathode materials. Theoretical predictions are that the energy density of power lithium batteries using these material systems is expected to increase to 200Wh/kg-300Wh/kg. Although the above-mentioned high-energy density materials have been widely studied, there are still some technical obstacles in meeting all index requirements, especially cyclability, rate characteristics, charge and discharge efficiency, safety, and volume change. Since the above-mentioned battery system has certain similarities with existing mature systems and has a relatively high degree of maturity, its research and development can draw on the experience of previous research on lithium batteries.
Accelerate the development of high-capacity/high-voltage cathode materials, high-capacity anode materials, and new electrolytes, focusing on breakthroughs in lithium-rich manganese-based cathode materials, silicon-carbon composite anode materials, 5V electrolytes, and their engineering and industrialization processes and equipment to improve materials structural stability. Develop model-based pole piece/battery design technology, new manufacturing technology, processes and equipment, etc., break through key technologies such as battery design, nano-slurry preparation, thick film electrode preparation, coated electrodes, battery formation, etc., and develop key engineering processes , equipment, improve battery power characteristics, lifespan, safety and reliability, and reduce costs.
Carry out research and development of analysis and evaluation technology for the service life, reliability, and safety of power lithium batteries, establish performance evaluation methods for key materials and single batteries, build a "material-battery-performance" closed-loop linkage evaluation mechanism, and develop and propose system design verification, Product testing and test analysis methods.
Battery safety can be improved through intelligent power management and protection circuits, but since the factors leading to safety come from inside the battery cell, starting with materials, especially electrolytes, is the fundamental solution. Adding flame retardants, using flame retardant or non-flammable organic solvents, ionic liquids or mixed ionic liquids all have certain effects and are better choices in the short term, but they cannot fundamentally eliminate hidden dangers. Therefore, using polymer electrolytes or inorganic electrolytes to develop all-solid electrolyte lithium batteries is the ultimate solution to the safety of energy-based power batteries.
High energy density design concept
The selection of cathode materials is mainly in two directions, one is single crystallization, and the other is high nickel. On the one hand, it increases energy density, and on the other hand, it ensures safety and long life. The negative electrode material mainly uses a mixed system, silicon carbon, we use silicon oxide, of course it has some processing. At the same time, we will use a system of blending primary particles and secondary particles to not only ensure the first effect, but also improve its own sub-stone. We will do a simple treatment on the surface of the negative electrode to help us improve its connection ability and reduce rebound.
Product quality assurance, relatively speaking, especially for consumer battery products, we no longer just look at the materials, but more at the production line, and more at the consistency of the production line and the raw materials, because the consistency of the raw materials is good. In order to better ensure product consistency.
However, the energy density and safety of power lithium batteries affect each other. The higher the energy density of the battery, the worse the stability of the battery. Recently, spontaneous combustion incidents of electric vehicles have occurred frequently, and companies still need to pursue energy density while ensuring safety.
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