technical characteristics 

the battery does not have a standard combination of technical characteristics of openness: lithium-ion cell encapsulation technology is not uniform, resulting in diversified forms the battery package. For example, the current lithium-ion battery for electric bicycle system, to distinguish from the material used in the battery, with a system using lithium manganese oxide, ternary system, there are systems such as lithium iron phosphate, the first cell of the two systems voltage 3. 7V, 36V commonly used in the field of electric bicycles, 10 requires use of cell structures in series, using the 48V electric bicycle art, the structure of the group need 13 cells in series; lithium iron phosphate third battery pack system , the cell voltage was 3. 2V, 36V for electric bicycle field, it needs to be done serially connected cell structure 12, the 48V electric car use, the need to use the battery pack 16 in series. Another important difference is that the current lithium-ion battery, a large difference in their form factor, there is employed a cylindrical configuration, has a square structure, resulting in a combination of the battery, the shape and volume of the battery pack differences will be relatively large, the external shape of the battery pack can not be unified, brought greater trouble of exchange of the battery pack, affect the popularity of the lithium ion battery.