Zhe Lv, Xun Guo, Xin-ping Qiu. New Li-ion Battery Evaluation Research Based on Thermal Property and Heat Generation Behavior of Battery[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 725-732. doi: 10.1088/1674-0068/25/06/725-732
Citation: Zhe Lv, Xun Guo, Xin-ping Qiu. New Li-ion Battery Evaluation Research Based on Thermal Property and Heat Generation Behavior of Battery[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 725-732. doi: 10.1088/1674-0068/25/06/725-732

New Li-ion Battery Evaluation Research Based on Thermal Property and Heat Generation Behavior of Battery

doi: 10.1088/1674-0068/25/06/725-732
Funds:  This work was supported by the State Key Basic Research Program of China (No.2009CB220105), the National International Science and Technology Coop-eration Project (No.2012DFG61480), China-Germany Electric Vehicle Project (No.2011AA11A290), China-US Electric Vehicle Project (No.2010DFA72760), Bei-jing Natural Science Foundation (No.2120001) and Tsinghua University Independent Research Program (No.20111081039).
  • Received Date: 2012-09-13
  • We do a new Li-ion battery evaluation research on the effects of cell resistance and polariza-tion on the energy loss in batteries based on thermal property and heat generation behavior of battery. Series of 18650 cells with different capacities and electrode materials are evalu-ated by measuring input and output energy which change with charge-discharge time and current. Based on the results of these tests, we build a model of energy loss in cells' charge-discharge process, which include Joule heat and polarization heat impact factors. It was reported that Joule heat was caused by cell resistance, which included DC-resistance and reaction resistance, and reaction resistance could not be easily obtained through routine test method. Using this new method, we can get the total resistance R and the polarization parameter η. The relationship between R, η, and temperature is also investigated in orderto build a general model for series of different Li-ion batteries, and the research can be used in the performance evaluation, state of charge prediction and the measuring of consistency of the batteries.
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New Li-ion Battery Evaluation Research Based on Thermal Property and Heat Generation Behavior of Battery

doi: 10.1088/1674-0068/25/06/725-732
Funds:  This work was supported by the State Key Basic Research Program of China (No.2009CB220105), the National International Science and Technology Coop-eration Project (No.2012DFG61480), China-Germany Electric Vehicle Project (No.2011AA11A290), China-US Electric Vehicle Project (No.2010DFA72760), Bei-jing Natural Science Foundation (No.2120001) and Tsinghua University Independent Research Program (No.20111081039).

Abstract: We do a new Li-ion battery evaluation research on the effects of cell resistance and polariza-tion on the energy loss in batteries based on thermal property and heat generation behavior of battery. Series of 18650 cells with different capacities and electrode materials are evalu-ated by measuring input and output energy which change with charge-discharge time and current. Based on the results of these tests, we build a model of energy loss in cells' charge-discharge process, which include Joule heat and polarization heat impact factors. It was reported that Joule heat was caused by cell resistance, which included DC-resistance and reaction resistance, and reaction resistance could not be easily obtained through routine test method. Using this new method, we can get the total resistance R and the polarization parameter η. The relationship between R, η, and temperature is also investigated in orderto build a general model for series of different Li-ion batteries, and the research can be used in the performance evaluation, state of charge prediction and the measuring of consistency of the batteries.

Zhe Lv, Xun Guo, Xin-ping Qiu. New Li-ion Battery Evaluation Research Based on Thermal Property and Heat Generation Behavior of Battery[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 725-732. doi: 10.1088/1674-0068/25/06/725-732
Citation: Zhe Lv, Xun Guo, Xin-ping Qiu. New Li-ion Battery Evaluation Research Based on Thermal Property and Heat Generation Behavior of Battery[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 725-732. doi: 10.1088/1674-0068/25/06/725-732

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