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A transient temperature modeling method for a 18650 lithium battery discharge cycle

A discharge cycle, transient temperature technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of unsuitable high dynamic lithium battery working environment and long calculation time

Active Publication Date: 2018-12-18
ZHEJIANG UNIV CITY COLLEGE
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Problems solved by technology

However, the calculation time of this model is long and it is not suitable for the highly dynamic lithium battery working environment

Method used

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  • A transient temperature modeling method for a 18650 lithium battery discharge cycle
  • A transient temperature modeling method for a 18650 lithium battery discharge cycle
  • A transient temperature modeling method for a 18650 lithium battery discharge cycle

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Embodiment Construction

[0083] The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0084] The transient temperature model modeling method of described 18650 type lithium battery discharge cycle, comprises the following steps:

[0085] Step 1): Establishment rules for the thermal model of the lithium battery cell discharge cycle. A two-dimensional electrochemical model based on physical characteristics is combined with the charge conservation and thermal diffusion equations reflecting the lithium battery performance to calculate the temperature ...

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Abstract

The invention relates to a transient temperature model modeling method for a 18650 type lithium battery discharge cycle, which comprises the following steps: 1) establishing a rule for a thermal modelof lithium battery single discharge cycle; 2) establishing the governing equation of transient thermal behavior; 3) establishing the boundary conditions of transient thermal behavior. The invention has the advantages that: the invention establishes a transient temperature model of lithium battery monomer under different discharge rate conditions based on Newman pseudo two-dimensional model, a constant current charging and discharging experimental device is designed by the invention, the thermal behavior data of the single cell is collected, calculated and simulated, and the transient temperature parameter and the voltage distribution curve are analyzed, so that the transient temperature model provided by the invention has good reliability and effectiveness; at the same time, the new modeland the new algorithm proposed by the invention have the advantages of fast calculation speed and high calculation precision.

Description

technical field [0001] The present invention relates to a transient temperature model and a voltage distribution simulation curve of a 18650 lithium battery discharge cycle working condition, more specifically, it relates to the establishment of a lithium battery transient temperature model under a constant current discharge working condition, and The function relationship curve between temperature and discharge voltage. Background technique [0002] Lithium batteries are favored by the industry due to their advantages such as high energy density, long life, and low self-discharge rate, and currently occupy the main market for power batteries. Lithium batteries also have relatively large limitations, mainly because they need to work at a suitable ambient temperature. Too high or too low a temperature will have a great impact on its performance, cycle life and safety. Many scholars at home and abroad are committed to the research of lithium battery temperature model, and pro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02E60/10
Inventor 汪秋婷戚伟肖铎
Owner ZHEJIANG UNIV CITY COLLEGE
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