Research for Prolong Cycle-life by a Composite Waveform Charging Method Applied on Lithium-ion Battery

• Main Authors: Fang-Haur Yang, 楊芳豪
• Other Authors: 黃國修
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/d63j4a

碩士 === 國立臺北科技大學 === 車輛工程系 === 106 === If the lithium battery is under high current use condition, it is prone to aging. Therefore, it is more suitable for trickle charge and discharging. However consumers usually want shorter the charging times, greater the discharge current and longer the time of continuous discharging. As a result, the battery is often lead to overloaded using. It caused the aging phenomenon happened sooner and even explosion due to abnormal temperature rise. It is a fatal flaw to be overcome in todays lithium battery industry and application technology. This study analyzes the causes of aging for lithium batteries. Using the first principle to establish a theoretical model of internal materials, and develop a set of charging methods by a composite waveform. Compared with the conventional constant current-constant voltage (CC-CV) charging method, the charging method proposed by this study, not only having a 5℃ lower temperature rise curve, but also increase 200 cycles of the cycle-life. It can even recover 18.7% of the capacity from the aging batterys, the charging time also short into 1/3 of the traditional time. Lithium batteries can therefore be used longer, even recycle the used batteries for reusing. Significantly reduce time costs, replace and maintenance costs, it is also safer for battery protection. It meets the needs of users for fast charging and large current discharge at the same time, perfectly crosses the technological dilemma of todays lithium battery industry. This should provide a solution to the problem of aging and long charging time. Reducing the costs and overcoming the problem of impassive high-current loading The related products such as electric vehicles and energy storage systems can improve endurance and service life.Increase consumers willingness to buy.