Li-Ion Battery

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L. R. Chen - One of the best experts on this subject based on the ideXlab platform.

  • a design of a grey predicted li ion Battery charge system
    IEEE Transactions on Industrial Electronics, 2008
    Co-Authors: L. R. Chen, R.c. Hsu, Chuansheng Liu
    Abstract:

    In this paper, we consider an Li-Ion Battery as a grey system. The grey prediction technique is then used to develop a grey-predicted Li-Ion Battery charge system (GP-LBCS). The proposed GP-LBCS is designed to replace the general constant-voltage (CV) mode using the GP mode to improve the Li-Ion Battery charge behavior. A GP algorithm is built in GP-LBCS to make the charge trajectories faster and safer. A 3-D Y-mesh diagram for describing the charge trajectories of the proposed GP-LBCS is simulated. A GP-LBCS prototype is designed and implemented to assess the charge performance. Experiments show that the charge speed and the charge efficiency of the proposed GP-LBCS, compared with the general constant-current-CV charge system, are increased above 23% and 1.6%, respectively. The charge speed and efficiency in the proposed GP mode are improved above 34% and 7%, respectively, compared with that in the general CV mode.

  • A grey-predicted Li-Ion Battery charge system
    30th Annual Conference of IEEE Industrial Electronics Society 2004. IECON 2004, 2004
    Co-Authors: L. R. Chen, Hsin-ying Yang
    Abstract:

    In this paper, a Li-Ion Battery is considered as a grey system and a predictable Li-Ion Battery charge system is implemented using the grey prediction theory. The proposed grey-predicted Li-Ion Battery charge system (GP-LBCS) can decrease charge time and avoid overcharge to increase life cycle. To assess the system performance, a prototype of the GP-LBCS is implemented. Experiments shown that the GM(1,1) model can precisely predict the Li-Ion Battery voltage, and the charge speed is increased about 16% such that the safe charge condition is held. These experimental results are very attractive as theory predicts.

  • A study of Li-Ion Battery charge forecasting using Grey theory
    2003
    Co-Authors: L. R. Chen, B.g. Ku
    Abstract:

    In this paper, a study of Li-Ion Battery charge forecasting using Grey theory is presented. A test-bench system for the Battery charge forecasting is designed and built. Using this test-bench system, the charge condition for charging Li-Ion Battery can be easily set and the data of the charged Li-Ion Battery can be obtained, simultaneously. Experimental results show that the GM(1,1) model can actually predict the Li-Ion Battery voltage curve when its sampling period is smaller than the safe sampling period. How the safe sampling period determined is presented, and a mathematical formula is for determining the safe sampling period successfully obtained in this paper. Finally, a test example is implemented to assess this proposed Li-Ion Battery charging forecast method. The experimental results are very attractive as theory predicts.

  • A study of Li-Ion Battery charge forecasting using Grey theory
    The 25th International Telecommunications Energy Conference 2003. INTELEC '03., 2003
    Co-Authors: L. R. Chen, C.h. Lin, R.c. Hsu, C.s. Liu
    Abstract:

    In this paper, a study of Li-Ion Battery charge forecasting using Grey theory is presented. A test-bench system for the Battery charge forecasting is designed and built. Using this test-bench system, the charge condition for charging Li-Ion Battery can be easily set and the data of the charged Li-Ion Battery can be obtained, simultaneously. Experimental results show that the GM(1,1) model can actually predict the Li-Ion Battery voltage curve when its sampling period is smaller than the safe sampling period. How the safe sampling period determined is presented, and a mathematical formula is for determining the safe sampling period successfully obtained in this paper. Finally, a test example is implemented to assess this proposed Li-Ion Battery charging forecast method. The experimental results are very attractive as theory predicts.

  • Fuzzy-controlled Li-Ion Battery charge system with active state-of-charge controller
    IEEE Transactions on Industrial Electronics, 2001
    Co-Authors: Guan Chyun Hsieh, L. R. Chen, Kuo Shun Huang
    Abstract:

    A fuzzy-controlled active state-of-charge controller (FC-ASCC) for improving the charging behavior of a lithium-ion (Li-Ion) Battery is proposed. The proposed FC-ASCC is designed to replace the general constant-voltage charging mode by two kinds of modes: sense and charge. A fuzzy-controlled algorithm is built with the predicted charger performance to program the charging trajectory faster and to keep the charge operation in a proposed safe-charge area (SCA). A modeling work is conducted for analyzing and describing the Li-Ion Battery in charging process. A three-dimensional Y-mesh diagram for describing the charging trajectories of the proposed FC charger is simulated. A prototype of a Li-Ion Battery charger with FC-ASCC is simulated and realized to assess the predicted charging performance. Experiment shows that the charging speed of the proposed FC charger compared with the general one increases about 23% and the charger can safely work in the SCA

Xia Shi-liang - One of the best experts on this subject based on the ideXlab platform.

  • Charge-discharge characteristics of polymer Li-Ion Battery used in EV
    Chinese Journal of Power Sources, 2006
    Co-Authors: Xia Shi-liang
    Abstract:

    The charge-discharge performance experiments and analyses of 200 Ah polymer Li-Ion Battery at different rates were carried out,and the polymer Li-Ion Battery's characters of voltage,capacity,temperature and internal resistance were given.The results show that polymer Li-Ion Battery has a favorable high current charge-discharge ability and the specific energy is up to 190 Wh/kg,which is closed to the goal of 200 Wh/kg for USABC's long-term requirement.Polymer Li-Ion Battery has a good future in EV application.

Li Zhong-jun - One of the best experts on this subject based on the ideXlab platform.

  • Additive of overcharge short-circuit for Li-Ion Battery
    Chinese Journal of Power Sources, 2008
    Co-Authors: Li Zhong-jun
    Abstract:

    In order to improve the overcharge tolerance of Li-Ion batteries,diphenyl ether as additive of overcharge short-circuit of Li-Ion batteries was studied.Experimental results show that diphenyl ether can be electro-oxidized at around 4.5 V(vs.Li/Li+)on Pt plate electrode in the organic electrolyte of Li-Ion Battery,and the polymer with excellent electrochemical activity is formed.Diphenyl ether has no obvious detrimental effect on the positive electrode material until 4.25 V by the LiMn2O4 powder microelectrode.The result of simulated LiMn2O4/Li cell shows that when the overcharge voltage reaches around 4.5 V,the cell voltage will not increase;at the same time,diphenyl ether is found to be electo-polymerized on the positive electrode from the observation of scanning electron microscope.Moreover,the produced H+ during polymerizing is reduced to H2 on the negative electrode,the internal pressure of batteries is raised,so the safety of Li-Ion Battery can be improved by activating safety valve.

Han L - One of the best experts on this subject based on the ideXlab platform.

  • Advances in secondary use research of power Li-Ion Battery
    Chinese Journal of Power Sources, 2014
    Co-Authors: Han L
    Abstract:

    With the rapid development of Li-Ion batteries for electric vehicle(EV), the recovery of power Li-Ion batteries was a serious problem in the coming years. Therefore, the secondary use of EV Li-Ion Battery should be considered. Ihe importance of the secondary use of EV Li-Ion Battery was analyzed. The current development of the Battery secondary use research was introduced, and the strategies and key technologies of the Battery secondary use were suggested.

Wang Hong - One of the best experts on this subject based on the ideXlab platform.

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