Study on internal resistance characteristics of lithium ferromanganese phosphate batteries
KANG Zhenhua
LING Xinchen
WAN Liping
JIANG Jibing
LIU Jianhua
Abstract：A Hybrid Pulse Power Characterization(HPPC)experiment was performed to study the relationships between internal resistance and cell temperature,discharge current,and time of lithium ferromanganese phosphate batteries.Furthermore,the Equivalent Circuit Model(ECM)was established and the least square fitting method was used to explore the characteristics and laws of three different types of direct current internal resistance.The results show that the internal resistances of ohm.electrochemical polarization,and concentration polarization decrease when cell temperature or discharge current increases.While discharging the cell at high temperature(≥25 ℃)or under a high current ratio(＞4 C),the ohmic resistance dominates;and the concentration polarization internal resistance is the major part of the direct current internal resistance at low temperature(＜10 ℃)or under low current ratio(＜1 C).
Keywords：lithium ferromanganese phosphate batterytemperaturecurrentdirect current internal resistanceohmic resistance
Publication Date：2024-10-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 246-250 )