![]() Their power to size and weight ratio is seen as a major benefit in many industries requiring critical power back up including data centers where space is often at a premium. They offer numerous benefits over the traditional VRLA battery and with stability and safety improvements confidence in the technology is growing. Lithium-ion batteries are becoming increasingly more commonplace in Uninterruptible power supply (UPS) systems. The Bolloré Bluecar, which is used in car sharing schemes in several cities, also uses this type of battery. Hyundai Motor Company uses this type of battery in some of its battery electric and hybrid vehicles, as well as Kia Motors in their battery electric Kia Soul. LiPo batteries are pervasive in mobile devices, power banks, very thin laptop computers, portable media players, wireless controllers for video game consoles, wireless PC peripherals, electronic cigarettes, and other applications where small form factors are sought and the high energy density outweighs cost considerations. LiPo packs also see widespread use in airsoft, where their higher discharge currents and better energy density compared to more traditional NiMH batteries has very noticeable performance gain (higher rate of fire). ![]() The voltage for long-time storage of LiPo battery used in the R/C model should be 3.6~3.9V range per cell, otherwise it may cause damage to the battery. Test reports warn of the risk of fire when the batteries are not used in accordance with the instructions. ![]() LiPo batteries are now almost ubiquitous when used to power commercial and hobby drones ( unmanned aerial vehicles), radio-controlled aircraft, radio-controlled cars and large scale model trains, where the advantages of lower weight and increased capacity and power delivery justify the price. The main difference between lithium ion polymer cells and lithium ion cells is the physical phase of the electrolyte, such that LiPo cells use dry solid, gel-like electrolytes whereas Li-ion cells use liquid electrolytes. The negative electrode material may have the same three parts, only with carbon replacing the lithium-metal-oxide. In addition to this, the positive electrode can be further divided into three parts: the lithium-transition-metal-oxide (such as LiCoO 2 or LiMn 2O 4), a conductive additive, and a polymer binder of poly(vinylidene fluoride) (PVdF). ![]() The separator itself may be a polymer, such as a microporous film of polyethylene (PE) or polypropylene (PP) thus, even when the cell has a liquid electrolyte, it will still contain a "polymer" component. Ī typical cell has four main components: positive electrode, negative electrode, separator and electrolyte. In 1996, Bellcore in the United States announced a rechargeable lithium polymer cell using porous SPE. From 1990 several organisations like Mead and Valence in the United States and GS Yuasa in Japan developed batteries using gelled SPEs. The dry SPE was the first used in prototype batteries, around 1978 by Michel Armand, and 1985 by ANVAR and Elf Aquitaine of France, and Hydro-Québec of Canada. The solid electrolyte can typically be classified as one of three types: dry SPE, gelled SPE and porous SPE. In the 1970s the original polymer design used a solid dry polymer electrolyte resembling a plastic-like film, replacing the traditional porous separator that is soaked with electrolyte. The primary difference is that instead of using a liquid lithium-salt electrolyte (such as LiPF 6) held in an organic solvent (such as EC/ DMC/ DEC), the battery uses a solid polymer electrolyte (SPE) such as poly(ethylene oxide) (PEO), poly(acrylonitrile) (PAN), poly(methyl methacrylate) (PMMA) or poly(vinylidene fluoride) (PVdF). Lithium polymer cells have evolved from lithium-ion and lithium-metal batteries. After that, other packaging forms evolved, including the flat pouch format. LiPo cells follow the history of lithium-ion and lithium-metal cells which underwent extensive research during the 1980s, reaching a significant milestone with Sony's first commercial cylindrical Li-ion cell in 1991. Main article: Lithium-ion battery § History
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |