Battery model parameter online identification method and system
A battery model and model parameter technology, applied in the field of battery model parameter online identification, can solve the problems of low battery model parameter accuracy and long calculation time, and achieve the effect of ensuring real-time performance and accuracy and simplifying calculation steps.
Active Publication Date: 2021-09-28
北京西清能源科技有限公司
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[0006] The purpose of the present invention is to provide a method and system for online identification of battery model parameters, aiming to solve the problems of low accuracy and long calculation time of battery model parameters calculated by existing offline parameter identification methods
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[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0040] The purpose of the present invention is to provide a method and system for online identification of battery model parameters, aiming to solve the problems of low accuracy and long calculation time of battery model parameters calculated by existing offline parameter identification methods.
[0041] see figure 1 , in order to achieve the above object, the technical solution adopted by the present invention is: a method for online identification of battery model parameters, comprising the following steps:
[0042] S1: Establish a battery equivalent circuit mod...
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The invention provides a battery model parameter online identification method, and belongs to the technical field of battery model parameter identification. The invention discloses a battery model parameter on-line identification method. The method comprises the following steps: firstly, establishing a battery equivalent circuit model according to a battery to be detected; then, when the discharge current is reduced to 0 in the discharge process of the to-be-tested battery, establishing a battery output voltage formula and a time domain response model of a battery end voltage according to the battery equivalent circuit model; and finally, according to the battery output voltage formula and the time domain response model of the battery end voltage, obtaining a to-be-tested battery model parameter. According to the method and system, the model parameters of the battery to be measured in the circuit model are calculated by using the transient segment when the discharge of the battery is reduced to 0, so that the calculation steps can be greatly simplified, and the real-time performance and the accuracy of online monitoring are ensured. The invention also provides a battery model parameter online identification system.
Description
technical field [0001] The invention belongs to the technical field of battery model parameter identification, and more specifically relates to a method and system for online identification of battery model parameters. Background technique [0002] In recent years, with the construction of large-scale new energy in the country, energy storage power stations using ultra-large battery packs for power storage, as an important supporting technology for smart grids, have ushered in rapid development. Lithium-ion batteries have become the mainstream battery technology for energy storage power stations in my country due to their significant advantages such as high stability, large capacity, long service life, and environmental protection. Lithium-ion batteries can be equivalent to a first-order RC circuit model, and the open-circuit voltage, ohmic resistance, polarization capacitance, and polarization resistance of the equivalent circuit are the key parameters to characterize the s...
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IPC IPC(8): G01R31/389G01R31/367G01R31/385G06F30/20
CPCG01R31/389G01R31/367G01R31/385G06F30/20
Inventor 梁惠施周奎史梓男林俊胡东辰孙爱春杨一飞
Owner 北京西清能源科技有限公司