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Battery thermal-runaway prediction method based on thermal-resistance network model

A network model and thermal runaway technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of large model scale, large amount of computing resources and computing time, poor timeliness and inability to realize online prediction, etc. predicted effect

Active Publication Date: 2018-10-12
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the finite element method can perform one-to-one modeling based on actual batteries, due to the large scale of the model, a large amount of computing resources and computing time are required, and the timeliness is poor and online prediction cannot be realized

Method used

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  • Battery thermal-runaway prediction method based on thermal-resistance network model
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  • Battery thermal-runaway prediction method based on thermal-resistance network model

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Embodiment Construction

[0033] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0034] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned throughout the spe...

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Abstract

The invention discloses a battery thermal-runaway prediction method based on a thermal-resistance network model. According to the method, battery single-bodies in a large battery pack are simplified into thermal network nodes, convection, thermal-conduction and radiation processes in a battery pack system are simplified into thermal resistance, and a circuit solving method is utilized to realize fast calculation of battery pack thermal-transfer processes. In addition, different cooling manners are simplified into corresponding thermal-resistance modules to be embedded into a battery pack thermal-resistance network, and effectiveness of the cooling manners on thermal-runaway protection can be evaluated. A thermal-runaway prediction process includes: establishing a single-body thermal-resistance network on the basis of thermal-transfer feature parameters of the battery single-bodies; calculating battery steady-state thermal-generation quantity, setting corresponding thermal-management schemes, and obtaining battery single-body thermal-generation features of a thermal-runaway process through experiment; establishing the battery pack thermal-resistance network; giving a thermal-runawayoccurrence position, and setting a normal battery thermal-runaway temperature lower-limit; and recording predicted battery pack damage progress and damage time, and assessing protection effects of the different thermal-management measures.

Description

technical field [0001] The invention belongs to the technical field of battery safety, in particular to a battery thermal runaway prediction method based on a thermal resistance network model. Background technique [0002] Due to the shortage of traditional energy sources and the objective requirements of environmental protection, new energy vehicles, including pure electric vehicles, hybrid vehicles and fuel cell vehicles, have become an important direction for the development of the automobile industry in various countries. Among them, pure electric vehicles using lithium-ion batteries, as a relatively mature technical solution, have realized the commercialization of multiple brands and their market share has grown rapidly. However, lithium-ion batteries have unavoidable safety issues due to their structural characteristics and the properties of the materials used. Due to the working voltage and current requirements of electric vehicles, the battery module requires thousa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/367G06F2119/08
Inventor 屈治国江智元
Owner XI AN JIAOTONG UNIV
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