Lithium-ion battery performance evaluation method based on TOPSIS theory
A power battery, ideal cleavage technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the expansion of influencing factors, cannot give completely accurate evaluation results of multiple lithium-ion power batteries, and lacks persuasion Power and other issues
Inactive Publication Date: 2014-11-26
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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However, this kind of method has the disadvantage of artificially expanding certain influencing factors, and cannot give completely accurate evaluation results for multiple lithium-ion power batteries, which is not convincing.
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[0067] The present invention will be further described below in conjunction with embodiment.
[0068] The present invention carries out correlation characteristic test experiment to 3 lithium-ion power batteries A1, A2, A3 of different aging degree, wherein A1 battery is the new battery performance best, A2, A3 aging degree is getting bigger and bigger, according to the obtained experiment The data is used to analyze the various characteristic parameters of the lithium-ion power battery. Based on the theory of approximating the ideal solution and the analytic hierarchy process, an evaluation model for the comprehensive performance of lithium-ion power batteries is established, and the performance evaluation results of lithium-ion power batteries are compared with the actual battery aging degree through calculation and analysis, so as to verify the effectiveness of the method.
[0069] see figure 1 The principle diagram of the present invention is based on the approaching idea...
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The invention relates to a lithium-ion battery performance evaluation method based on a TOPSIS theory. The lithium-ion battery performance evaluation method comprises the steps that evaluation objects and evaluation indexes are determined, and an index matrix is established; index normative processing is conducted, and a normative matrix is formed; index weights are calculated with an analytic hierarchy process, and a weighted normative matrix is constructed through the normative matrix and index weight vectors; positive ideal solutions and negative ideal solutions are determined; Euclidean distances of the positive ideal solutions and the negative ideal solutions of all schemes to be evaluated are calculated; the relative close degrees of index values and ideal solutions of all the scheme to be evaluated are calculated; the schemes to be evaluated are evaluated according to the size of the relative close degrees. According to the technical scheme, a multi-index comprehensive evaluation method is provided for evaluating the lithium-ion battery performance, the one-sidedness of the single index serving as the evaluation criterion is overcome, and a reliable theoretical foundation is provided for the performance evaluation and screen matching of lithium-ion batteries.
Description
technical field [0001] The invention relates to a method for evaluating the comprehensive performance of a lithium-ion power battery, in particular to a method for evaluating the performance of a lithium-ion power battery based on an approaching ideal solution theory and an analytic hierarchy process. Background technique [0002] With the vigorous development of electric vehicles and electric energy storage, lithium-ion power batteries are also widely valued as the main power source. The performance of lithium-ion power batteries has a major impact on the safety, efficiency and economy of electric vehicles. There are many performance parameters of lithium-ion power batteries, and different types of lithium-ion power batteries are different in terms of uniformity, safety and cost. If the lithium-ion power battery is used without reliable screening, the reliability of the lithium-ion power battery will be greatly reduced, and even the performance of the electric vehicle will...
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IPC IPC(8): G06F19/00
Inventor 罗敏赵伟肖勇林国营张永旺孙卫明姜久春孙丙香翟燕
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID