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- W4285524247 abstract "The electrochemical reaction of lithium-ion power batteries is easily affected by temperature, which leads to changes in battery capacity. In order to accurately predict the battery states of charge(SOC) and provide a basis for battery management strategies, this paper measures and studies lithium-ion batteries with different SOC in a wide temperature range based on electrochemical impedance spectroscopy. An online estimation method of battery SOC based on electrochemical impedance spectroscopy is proposed.The experimental results show that, within the normal operating temperature (15-45°C) of the lithium battery, the SOC hardly has any effect on the battery impedance phase. We compared the impedance amplitude changes under different SOCs and choose 100 Hz as the characteristic frequency. The 100HZ impedance amplitude is used to estimate the battery SOC. Finally, the experimental results show that the SOC estimation model established in this paper can control the estimation error within 4%. This article proves that the impedance spectrum amplitude has a good characterization ability for battery SOC, which can provide a reference for accurate estimation of battery SOC and improve battery safety." @default.
- W4285524247 created "2022-07-16" @default.
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- W4285524247 date "2021-01-01" @default.
- W4285524247 modified "2023-10-02" @default.
- W4285524247 title "Estimation of state of charge of lithium battery based on electrochemical impedance spectroscopy" @default.
- W4285524247 doi "https://doi.org/10.1049/icp.2022.0276" @default.
- W4285524247 hasPublicationYear "2021" @default.
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