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Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
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release time:2024-03-15 Hits: Popular:AG11 battery
What is an AA rechargeable battery? Development of AA rechargeable battery technology
What is an AA rechargeable battery? Development of AA rechargeable battery technology. Recently, academia and industry have placed high hopes on all-solid-state lithium batteries. One of the most important driving forces for the development of all-solid-state lithium batteries is safety. Battery safety ranks first in importance for all application areas. The core issue of battery safety is to prevent thermal runaway and heat diffusion.
What is an AA rechargeable battery?
The so-called "AA rechargeable battery" is a lithium battery in which the electrode and electrolyte materials used are solid within the operating temperature range and do not contain any liquid components, so our full name is "all-solid-state electrolyte lithium battery". According to whether they can be repeatedly charged and discharged, they can be further divided into all-solid-state lithium primary batteries and all-solid-state lithium secondary batteries. Primary batteries are actually already useful.
All-solid-state lithium secondary batteries are further divided into all-solid-state lithium-ion batteries and lithium metal batteries. These two concepts need to be distinguished. The so-called all-solid-state lithium metal batteries use lithium metal as the negative electrode. The negative electrodes of most power batteries currently in use are Carbon, silicon carbon or lithium titanate. The concept of all-solid-state lithium batteries appeared earlier than lithium-ion batteries. Lithium-ion batteries only have a history of about 25 years. They were invented by the Japanese and have only been used in cars for more than 10 years. They are very young but making rapid progress. The all-solid-state lithium batteries referred to in the early days were all-solid-state metal lithium batteries with metallic lithium as the negative electrode. This was the previous concept.
Advantages of all-solid-state lithium batteries
1) Good safety, the electrolyte is non-corrosive, non-flammable, and there is no leakage problem;
2) Good high temperature stability, can work between 60℃-120℃;
3) It is expected to obtain higher energy density. Solid electrolyte has good mechanical properties and effectively suppresses the short circuit problem caused by the diameter growth of lithium element, allowing the selection of electrode materials with higher theoretical capacity, such as lithium element as the negative electrode; the voltage window of solid electrolyte is wider, and higher potential can be used The material is used as the positive electrode without worrying about the problem of electrolyte decomposition;
4) The solid electrolyte supports the thin film design of the battery cell, which can reach a minimum of several nanometers, broadening the application range of lithium batteries and making it possible for the battery to have its own flexibility.
5) Materials with large resistance and large volume changes during charging and discharging can be used as the positive and negative electrodes. Thin-film positive and negative electrode materials, as long as the film-forming performance is good, even if the resistance of the material is high, as long as it is thin enough, it will still not Have a significant impact on battery characteristics.
Development of AA rechargeable battery technology
According to recent technology trend predictions, all-solid-state lithium batteries may achieve a breakthrough in solid-state electrolyte technology before 2030, with a single energy density exceeding the goal of 500Wh/kg and reaching mass production capabilities.
All-solid-state metal lithium batteries are the most promising candidate technology to replace existing high-energy-density lithium-ion batteries. Their energy density is expected to be 2 to 5 times that of existing lithium-ion batteries, with longer cycle performance and service life, and better rate performance. High, and may essentially solve the safety problems of existing liquid electrolyte lithium-ion batteries.
The high-temperature thermal runaway and high-temperature cycle characteristics of all-solid-state lithium batteries are significantly better than those of liquid electrolyte cells. At the module and system levels, through power management and thermal management systems, the thermal runaway and thermal diffusion of the cells can be further prevented. Compared with Liquid electrolyte cells and thermal insulation protective materials can be better used in modules and systems, rather than taking into account both heat dissipation and thermal insulation as currently done.
All-solid-state batteries are lightweight and have high energy density. After using all-solid electrolytes, the applicable material system of lithium-ion batteries will also change. Metal lithium can be used as the negative electrode instead of the graphite negative electrode. This can significantly reduce the amount of negative electrode material and significantly improve the energy density of the entire battery.
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