Lithium- ion battery is an energy storehouse device, presently generally used lithium- ion batteries can be divided into lithium iron phosphate batteries, ternary batteries and lithium manganate batteries according to the cathode material. Lithium iron
phosphate batteries, for illustration when discharged, the positive iron phosphate and lithium ions from the negative electrode through the electrolyte to the lithium ions and external circuit conduction to the electron combination to induce lithium iron
phosphate, the negative graphite subcaste bedded in the lithium off, into lithium ions and electrons through the electrolyte and external circuit conduction to the positive electrode, independently.
The energy cell is basically a creator in which the energy and oxidizer are converted into electricity directly through electrochemical responses without combustion. thus, energy cells aren't limited by the
Carnot cycle and have high energy conversion effectiveness. The effectiveness of energy cell can reach 60 when it's used as a power conversion device, and indeed up to 80 when it's used as a cogeneration device.
Energy cells are divided into alkaline energy cells, phosphoric acid energy cells, solid oxide energy cells, molten carbonate energy cells, and proton exchange membrane energy cells according to their
electrolytes. Different types of energy cells have different operation areas and use surroundings. Proton exchange membrane energy cells can be used in the temperature range from room temperature to about 80 °C.
This type is principally used in energy cell vehicles at present.
Take the proton exchange membrane energy cell as an illustration, when generating electricity, oxygen at the positive electrode combines with hydrogen ions conducted from the negative electrode and electrons conducted from
the external circuit to produce water, and hydrogen tittles at the negative electrode lose electrons to come hydrogen ions and electrons through the electrolyte and external circuit to the positive electrode independently.
The introductory principles of lithium- ion battery and energy cell, positive and negative electrode accoutrements ,etc. are shown in Table 1.