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The battery is the key to the development of folding electric vehicle, and the car power battery is difficult to be in "low cost", "high capacity requirement" and "high safety requirement".Applied to a wide range folding electric bikes, rely on advanced battery after 10 years of screening, now widely regarded nickel-metal hydride batteries, batteries, lithium ion and lithium polymer battery.The hydrogen - nickel battery has twice as much energy as a lead-acid battery, and other properties are better than lead-acid batteries.The iron battery is rich in resources and cheap iron materials, and the cost is greatly reduced.Lithium is the lightest, chemical property is very active metal, lithium-ion battery energy storage unit weight for 3 times of lead-acid batteries, lithium polymer battery for 4 times, and lithium resources is rich, the price is not expensive, is a very promising battery.
The history of battery electric vehicles.The world's first electric car will have to fold was born in 1881, invented artificial French engineer gustave luffy, this is a tricycle powered with lead-acid batteries, and in 1873, by the British Robert Davidson with a battery powered invented folding electric cars, is not included in the confirmation of the international scope.Then came lead-acid batteries, nickel-cadmium batteries, nimh batteries, lithium-ion batteries, and fuel cells as electricity.
Folding electric cars other related technology, has a great progress in recent years, such as: ac induction motor and its control, rare earth permanent magnet brushless motor and its control, battery and energy management system, intelligent and fast charging technology, low resistance tires, light weight and low wind resistance body, braking energy recovery and so on, the progress of these technologies make folding electric cars to became more and more perfect and practical.