Method for evaluating influence of battery production process link on battery consistency

A production process and consistent technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve problems such as reducing the amount of calculation, and achieve the effect of simple calculation process, high reliability and scientificity, and less manual calculation.

Pending Publication Date: 2022-05-13
JIANGNAN UNIV
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Problems solved by technology

[0005] In order to solve the consistency analysis problem of the battery production process, reduce the impact of extreme data in expert scoring, avoid repeated weight calculations in the process of correcting the fuzzy consistency judgment matrix, and reduce the significant amount of calculation brought by the traditional consistency weight solution method, The invention provides a method for evaluating the impact of battery production process on battery consistency. The method is analyzed based on the fuzzy group intelligent censored scoring mechanism. The scoring table is used for data processing to reduce the influence of experts' subjective factors on the consistency analysis system; then the consistency index is converted into a fitness function, and the initial particle swarm is constructed by using the modified fuzzy consistency matrix and factor weights, combined with the particle swarm The weight is obtained through the optimization calculation, the consistency matrix discriminant test is realized, and the consistency analysis system of the power battery production process is established. This process does not require repeated scoring by experts, nor repeated calculations in the consistency verification and matrix correction process, thus greatly reducing the amount of calculation. Moreover, the weights that best meet the consistency requirements are obtained through particle swarm optimization, while the existing methods only obtain weights that meet the consistency requirements, and do not further optimize within the range that meets the consistency requirements to obtain the most consistent weights. Weights

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  • Method for evaluating influence of battery production process link on battery consistency
  • Method for evaluating influence of battery production process link on battery consistency
  • Method for evaluating influence of battery production process link on battery consistency

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Embodiment 1

[0048] This embodiment provides a method based on swarm intelligence to evaluate the impact of battery production process on battery consistency. Please refer to figure 1 , the method includes:

[0049] Step1: Construct an n-dimensional fuzzy consistent matrix R according to the expert scoring table e , the expert scoring table is the preliminary evaluation data of the degree of influence of factors in each process link of battery production on the consistency of the battery;

[0050] Step2: The fuzzy consistent matrix R e Each element in is used as the initial particle swarm, set the maximum number of iterations T, set the consistency optimization function CIF(n) as the fitness function of the particle swarm algorithm, set the particle position value range [0,b] and the particle velocity The value range is [0,c]; the corresponding weight w of each level factor i As optimization variables, a total of (n-1)(n-2) / 2+n optimization variables, i=1,2,...n;

[0051] Step3: Take t...

Embodiment 2

[0056] This embodiment provides a method based on swarm intelligence to evaluate the impact of the battery production process on the consistency of the battery. The actual production process of the pouch battery is used as an example for illustration. The method includes:

[0057] Step 1: Obtain expert scoring data and construct a fuzzy consistency matrix;

[0058] Based on the knowledge reserves of experts and the operating experience of front-line engineers, the professional knowledge and production experience are quantified by designing a scoring mechanism.

[0059] According to the customary grading method in the industry, the actual production process of the pouch battery is divided into four levels of factor layers. The first level factor layer includes the production process, assembly process and sorting process. Assembly process; the second factor layer includes pretreatment, material mixing, coating, rolling, slicing, tab welding, lamination, forming edge banding, vac...

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Abstract

The invention discloses a method for evaluating the influence of a battery production process link on battery consistency, and belongs to the technical field of battery production process capability analysis. According to the method, when a fuzzy consistency matrix is constructed, the idea of a truncation averaging method is introduced, and a collected expert scoring table is subjected to data processing, so that the influence of subjective factors of experts on a consistency analysis system and the influence of extreme data in expert scoring are reduced; and then converting the consistency index into a fitness function, constructing an initial particle swarm by using the corrected fuzzy consistency matrix and the factor weight, performing optimization calculation in combination with the particle swarm to obtain the weight, realizing discriminant inspection of the consistency matrix, and establishing a consistency analysis system of the power battery production process without repeated scoring by experts in the process. And repeated calculation of the consistency verification and matrix correction process is not needed, so that the calculation amount is greatly reduced, and the weight which most meets the consistency requirement is obtained through particle swarm optimization.

Description

technical field [0001] The invention relates to a method for evaluating the impact of battery production process links on battery consistency, and belongs to the technical field of battery production process capability analysis. Background technique [0002] Power batteries are a key component of power equipment such as new energy vehicles, and are often applied in groups. The key to grouping lies in the consistency of battery products. The degree of consistency of battery products refers to the convergence of important characteristic parameters of a group of power battery cells, such as voltage and capacity. Because the power batteries are supplied in groups, if the consistency of the power battery cells is poor, the battery life will decay too quickly, and the battery power supply will be unstable, which will bring significant safety hazards. [0003] The production process of the power battery involves 12 process links, and different process links involve the selection p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/396
CPCG01R31/367G01R31/396
Inventor 王子赟张梓蒙王艳占雅聪纪志成
Owner JIANGNAN UNIV
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