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Battery tab optimization method

An optimization method and technology of battery tabs, applied in battery pack components, circuits, electrical components, etc., can solve problems such as time-consuming and consumables

Pending Publication Date: 2019-12-17
CENT SOUTH UNIV
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Problems solved by technology

[0003] In the conventional optimization method, it is necessary to prepare a large number of batteries for charging and discharging, so as to obtain their surface temperature rise curve, which is not only time-consuming but also material-consuming

Method used

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Embodiment 1

[0087] Such as Figure 1-8 The optimization method of the battery tab shown includes the following steps:

[0088] Step 1. Select the tab temperature at different places and the overall temperature difference of the lithium battery as the optimization target;

[0089] Step 2, obtaining basic battery parameters including battery electrode structural parameters, electrode material kinetic parameters and electrode material physical parameters;

[0090] Step 3. Establish a quasi-two-dimensional electrochemical model and a three-dimensional thermal model for bidirectional coupling of lithium batteries:

[0091] (1) Establish an electrochemical model: use line segments to represent different compositions of electrodes, and describe different differential equations or partial differential equations at different electrodes, where,

[0092] The positive and negative electrodes are described by the following equations:

[0093]

[0094] The boundary conditions are:

[0095]

...

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Abstract

The invention relates to a battery tab optimization method, which belongs to the technical field of lithium batteries, and comprises the following steps: selecting tab temperatures at different positions and the overall temperature difference of the lithium battery as optimization targets; acquiring basic parameters of the battery; establishing an electrochemical-thermal coupling model of the lithium battery; comparing the calculation value of the electrochemical-thermal coupling model of the battery with the actual measurement value result; and performing thermal analysis on the discharge process of the battery electrochemical-thermal coupling model, and determining the optimized tab distribution position according to the thermal analysis result. According to the method, the heat distribution of the lithium battery during discharging is obtained by changing the positions of the tabs, and thermal analysis is performed according to the existing result, so that manpower, material resources and financial resources required for optimizing the lithium ion battery are greatly reduced, and the optimization efficiency of the lithium battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a method for optimizing battery tabs. Background technique [0002] Due to its high energy density, low self-discharge rate, high voltage, and no memory effect, lithium-ion batteries have been widely used in small portable appliances such as mobile phones, digital cameras, notebook computers, electric vehicles, and aerospace fields. However, the thermal safety of lithium batteries during use has become a hot topic in current research. Under conditions such as high rate charge and discharge, high temperature or low temperature environment, and temperature rise caused by internal short circuit, it will eventually lead to thermal runaway, and even cause battery combustion and explosion. . The safety performance of lithium-ion batteries can be attributed to the heat generation and heat dissipation of the battery. There are two main types of battery thermal management meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/00H01M2/26H01M50/531
CPCG06T17/00H01M50/531Y02E60/10
Inventor 贾明刘宇汪齐刘一民汤水刘芳洋蒋良兴
Owner CENT SOUTH UNIV
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