Modeling and state of charge (SOC) estimation of Lithium cells are crucial techniques of the lithium battery management system. The modeling is extremely complicated as the operating status of lithium battery is affected by temperature, current, cycle number, discharge depth and other factors. This paper studies the modeling of lithium iron phosphate battery based on the Thevenin’s equivalent c...

With the extensive applications of lithium ion batteries, many batteries fire and explosion accidents were reported. Base on the combustion triangle theory, the combustion triangle contributions of lithium ion battery were analysed. By using C80 micro calorimeter, the thermal behavior studies on the materials show that the flammable electrolyte, oxygen generated by charged cathode and anode dec...

A safe lithium-sulfur (Li?S) battery employs a composite polymer electrolyte based on poly(ethylene glycol) dimethyl ether (PEGDME) solid at room temperature. The membrane enables stable and reversible Li?S electrochemical process already 50 °C, with low resistance the electrode/electrolyte interphase fast Li+ transport. relatively molecular weight of PEGDME optimal composition in terms salts c...

Olivine LiFePO4 has received much attention recently as a promising storage compound for cathodes in lithium ion batteries. It has an energy density similar to that of LiCoO 2, the current industry standard for cathode materials in lithium ion batteries, but with a lower raw materials cost and an increased level of safety. An inherent limitation of LiFePO4 acknowledged by researchers studying t...

For the past decade the lithium-ion battery has had great success in powering many of our rechargeable energy needs. It’s ability to hold more energy than other conventional batteries is what has kept it at the top of the battery pyramid for more than a decade. However, to create a more sustainable future, scientists and engineers have continued to search for a battery technology that could one...

Battery safety has been a very important research area over the past decade. Commercially available lithium ion batteries employ low flash point (< 80 °C), flammable, and volatile organic electrolytes. These organic based electrolyte systems are viable at ambient temperatures, but require a cooling system to ensure that temperatures do not exceed 80 °C. These cooling systems tend to increase ba...