Single lithium-ion battery three-dimensional thermal model based on electrochemical characteristics
A lithium-ion battery and single battery technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of less consideration of battery external temperature parameters and internal thermal models, model integrity and validity defects, etc.
Active Publication Date: 2018-10-12
ZHEJIANG UNIV CITY COLLEGE
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Problems solved by technology
At present, the research results of lithium-ion battery models rarely consider the external temperature parameters and internal thermal model of the battery, and there are certain defects in the integrity and effectiveness of the model in practical applications.
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[0044] The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
[0045] figure 1 illustrate
[0046] (1) The establishment process of the three-dimensional thermal model of a single lithium-ion battery is as follows: a one-dimensional electrochemical model is established according to the electrochemical characteristics of the single battery, a two-dimensional electron current conservation model is established by combining the electrolyte concentration distribution diagram and the circuit equivalent model theory, and finally c...
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The invention relates to a single lithium-ion battery three-dimensional thermal model based on electrochemical characteristics. The single lithium-ion battery three-dimensional thermal model includesthe steps of: 1) determining a single lithium-ion battery three-dimensional thermal model establishment scheme; 2) establishing a single lithium-ion battery radial thermal model; and 3) establishing asingle lithium-ion battery thermal model equation. The invention has the beneficial effects that a cycle aging experiment is performed on the single lithium-ion battery, and the experiment is carriedout in different temperature environments; a reference performance test is carried out in the temperature environments of 15 DEG C, 25 DEG C and 30 DEG C, and a constant current and constant voltagecharging mode is adopted; the cycle aging test is carried out in the temperature environments of 25 DEG C and 50 DEG C respectively, and constant current charging, constant voltage charging and constant current discharging modes are adopted; and each experiment is allowed to stand for 6 hours.
Description
technical field [0001] The invention relates to a single lithium ion battery thermal model based on electrochemical characteristics, more specifically, it relates to a single lithium ion battery three-dimensional thermal model based on electrochemical parameters and circuit equivalent theory. Background technique [0002] The capacity of lithium batteries will gradually decay with the increase of use time, and replacing batteries will bring additional costs to electric vehicles. For the research of high energy density lithium-ion batteries, in addition to the material structure and electrochemical characteristics, the establishment of battery models and the estimation and optimization of battery performance parameters are also one of the key technologies. Thermal runaway and thermal abuse are one of the important factors affecting the safety of high-capacity lithium-ion batteries, which are usually described as self-initiated thermal runaway and abuse thermal runaway. At pr...
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IPC IPC(8): G01R31/36
CPCG01R31/36
Inventor 汪秋婷戚伟刘泓肖铎周选昌
Owner ZHEJIANG UNIV CITY COLLEGE