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Battery design method with multi-parameter synergistic effect

A technology of synergy and design method, applied in special data processing applications, computing, electrical digital data processing, etc., can solve problems such as changes in battery performance that are difficult to meet volume fraction changes

Inactive Publication Date: 2019-09-13
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent is mainly used for performance optimization when only changing the coating thickness of the electrode. It is difficult to satisfy the change of volume fraction caused by the change of process parameters and the change of battery performance caused by the change of particle radius of different active materials. People are also conducting related research

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  • Battery design method with multi-parameter synergistic effect
  • Battery design method with multi-parameter synergistic effect
  • Battery design method with multi-parameter synergistic effect

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Embodiment 1

[0034] Take the soft-pack lithium iron phosphate battery as an example. The customer’s battery size is shown in Table 1. The battery application is usually 1C discharge, which requires the battery to have the highest energy density, that is, under the 1C discharge condition, the energy density of the cell is maximized.

[0035] Table 1 Three-dimensional size parameters of the battery

[0036] width thickness high 100mm 12mm 115mm

[0037] According to the customer's needs, select the battery specifications similar to the requirements. The electrode design parameters of the battery selected in this embodiment, that is, the battery structure parameters. The battery structure parameters are shown in Table 2. Under this design, the energy density of the battery cell for 1C discharge is 159.40Wh / kg.

[0038] Table 2 Battery structure parameters

[0039]

[0040] Remarks: A slash means that the parameter does not exist or is not considered

[0041] ...

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Abstract

The invention discloses a battery design method with a multi-parameter synergistic effect, and aims to solve the problem that an existing optimization algorithm for calculating an optimal value is affected by the application field, the calculation precision and the calculation efficiency. The method comprises the following specific steps: step 1, determining a design variable; step 2, acquiring parameters of the battery; step 3, establishing an electrochemistry-thermal coupling model of the battery by using the parameters in the step 2; step 4, verifying the effectiveness of the electrochemistry-thermal coupling model in the step 3; 5, calculating the energy density E and the power density P of the battery; and 6, calculating the model in the step 3 through a BOBYQA method to obtain an optimized value of the design variable in the step 1. The method establishes the rational electrochemistry-thermal coupling model, introduces a simulation result into an optimization module in real time,and an iteration value obtained through calculation of the optimization module is fed back to the electrochemistry- the thermal coupling model, rapid and efficient optimization calculation is carriedout.

Description

technical field [0001] The invention relates to the battery field, in particular to a multi-parameter synergistic battery design method. Background technique [0002] With the advantages of high energy density, long cycle life and high discharge voltage, lithium-ion batteries are widely used in 3C electronics, electric transportation and energy storage power stations. With the continuous development of lithium-ion battery technology, customers' demand for lithium-ion batteries Various performance indicators put forward higher demands. [0003] At present, the commonly used new battery product development design and performance optimization are mainly based on traditional experimental methods. This method requires a lot of manpower and material resources in the production and development process, and the development cycle is long. However, computer numerical simulation can overcome the above problems and become an important means to study the internal characteristics of the ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 贾明李立祥刘宇刘芳洋张茂贵汤水
Owner CENT SOUTH UNIV
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