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Electrical Characteristics of Power Lithium-Ion Batteries for Full Ocean Depth Submersible

ZHOU Shiyao;CHEN Ziqiang;ZHENG Changwen;HUANG Deyang;LIU Jian;GE Yunlong;State Key Laboratory of Ocean Engineering,Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai Jiao Tong University;  
A series of lithium iron phosphate batteries characteristics test were taken to analyzing the relationship between batteries electrical characteristics and the temperature or pressure.The relationship between maximum depth of discharge(DOD),internal resistance and open circuit voltage with temperature and pressure was studied.The results show that under atmospheric pressure and 3℃,the maximum DOD of the battery is greatly attenuated.The ohmic internal resistance and the polarization internal resistance increase significantly,and the open circuit voltage is slightly reduced.Compared with atmospheric pressure and 20℃,at the high pressure of 100 MPa and 20℃,the maximum discharge depth of the battery is greatly attenuated,the ohmic internal resistance is slightly increased,and the open circuit voltage is slightly lowered.
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