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Method for optimizing thickness of battery electrode

A battery electrode, electrode technology, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve problems such as inappropriate battery optimization design

Inactive Publication Date: 2017-09-08
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This patent is mainly applied to the prediction of battery performance after the shape of the battery is changed, but it is not applicable to the optimal design of batteries with different specifications or new materials of the same shape

Method used

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  • Method for optimizing thickness of battery electrode

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Embodiment 1

[0117] Taking the lithium iron phosphate battery system as an example, the customer's battery size requirements are shown in Table 1. The battery application is usually 1C discharge, and the energy density of the battery needs to be maximum, that is, under the 1C discharge condition, the energy density of the cell is maximized.

[0118] Table 1 Three-dimensional size parameters of the battery

[0119] width thickness high 100mm 12mm 115mm

[0120] According to the customer's needs, select the battery specifications similar to the requirements. The battery electrode design parameters selected in this example, that is, the battery structure parameters, are shown in Table 2. Under this design, the energy density of the battery cell under 1C discharge is 159.40Wh / kg.

[0121] Table 2 Design parameters of battery electrode structure

[0122] parameter name negative electrode positive electrode diaphragm Negative electrode collector Po...

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Abstract

The present invention discloses a method for optimizing the thickness of a battery electrode. The method comprises the following steps: 1) taking the maximum energy density E or the maximum power density P as the optimization target of the method; 2) obtaining electrode structure design parameters, and electrode material kinetic parameters and thermophysical parameters of the base battery specification; 3) establishing an electrochemical thermo-coupling model, wherein the electrochemical thermo-coupling model is the coupling of a quasi-two-dimensional electrochemical model and a three-dimensional thermal model; 4) verifying the validity of the model; and 5) obtaining the optimized thickness of the battery electrode. According to the method disclosed by the present invention, the development period of new materials or new products can be effectively shortened, the development cost is reduced, and the certain guiding significance is offered for the development of new materials or new products.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a method for optimizing the thickness of battery electrodes. Background technique [0002] At present, with the continuous development of lithium-ion battery technology, the application market of lithium-ion batteries continues to expand, and accordingly, customers' specifications and performance requirements for lithium-ion batteries are becoming more and more diverse. [0003] Using traditional experimental methods to develop new battery products and optimize their design consumes a lot of manpower and material resources, and the efficiency is low. Using computer simulation to optimize battery design can greatly shorten the battery design cycle. Moreover, at present, simulation has become an important means to study the internal characteristics of batteries to guide battery design. The electrochemical thermal coupling model is also becoming more and more mature. For example, ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 贾明李书国艾燕程昀杜双龙蒋跃辉
Owner CENT SOUTH UNIV
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