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Lithium iron phosphate battery thermal runaway monitoring method and system based on information fusion

A lithium iron phosphate battery, thermal runaway technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of real-time and economic reduction, and achieve the effect of improving efficiency and convenient operation

Active Publication Date: 2021-08-13
NORTH CHINA UNIVERSITY OF TECHNOLOGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the real-time measurement of the internal temperature of the battery during operation, it is necessary to pay the price of real-time performance and economical reduction, so it cannot meet the current needs.

Method used

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  • Lithium iron phosphate battery thermal runaway monitoring method and system based on information fusion
  • Lithium iron phosphate battery thermal runaway monitoring method and system based on information fusion
  • Lithium iron phosphate battery thermal runaway monitoring method and system based on information fusion

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Embodiment 1

[0059] see figure 1 , this embodiment provides a method for monitoring thermal runaway of a lithium iron phosphate battery based on information fusion, the method comprising the following steps:

[0060] Step 101: Use the Spearman rank correlation method to select a number of temperature measurement points with a relatively high degree of non-linear correlation with the internal temperature of the lithium iron phosphate battery from the surrounding temperature measurement points of the lithium iron phosphate battery, and record the selected temperature measurement points as For specific surrounding temperature measurement points;

[0061] Step 102: collecting temperature data of at least two specific surrounding temperature measurement points at a certain moment;

[0062] Step 103: Fusing the temperature data of specific surrounding temperature measurement points to obtain a temperature fusion value;

[0063] Step 104: Input the temperature fusion value into the isolated for...

Embodiment 2

[0094] see Figure 5 , this embodiment provides a thermal runaway monitoring system for lithium iron phosphate batteries based on information fusion, the system includes:

[0095] The specific surrounding temperature measurement point screening module 501 is used to select a number of temperature measurement points with a relatively high degree of non-linear correlation with the internal temperature of the lithium iron phosphate battery from the surrounding temperature measurement points of the lithium iron phosphate battery by using the Spearman rank correlation method, Record the selected temperature measurement points as specific surrounding temperature measurement points;

[0096] A temperature data collection module 502, configured to collect temperature data of at least two specific surrounding temperature measurement points at a certain moment;

[0097] The temperature data fusion module 503 is used to fuse the temperature data of specific surrounding temperature measu...

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Abstract

The invention discloses a lithium iron phosphate battery thermal runaway monitoring method and system based on information fusion. The method comprises the following steps: screening out a plurality of temperature measurement points with relatively high nonlinear correlation degree with the internal temperature of the lithium iron phosphate battery from surrounding temperature measurement points of the lithium iron phosphate battery by adopting a Spearman grade correlation method, and recording the screened temperature measurement points as specific surrounding temperature measurement points; collecting temperature data of at least two specific surrounding temperature measurement points at a certain moment; fusing the temperature data of the specific surrounding temperature measurement points to obtain a temperature fusion value; and inputting the temperature fusion value into an isolated forest model to detect whether the lithium iron phosphate battery is subjected to thermal runaway, the isolated forest model being an isolated forest model established based on temperature data of specific surrounding temperature measurement points when the lithium iron phosphate battery is in normal operation, and the normal operation being operation in which the lithium iron phosphate battery is not subjected to thermal runaway. Temperature data in the battery does not need to be measured, efficiency is improved, and operation is more convenient.

Description

technical field [0001] The invention relates to the technical field of energy storage battery fault monitoring, in particular to a thermal runaway monitoring method and system for a lithium iron phosphate battery based on information fusion. Background technique [0002] Battery energy storage is an energy storage technology that uses electrochemical reactions to realize the mutual conversion between electrical energy and chemical energy. It is the most widely used in various battery energy storage technologies. The crystal structure of lithium iron phosphate is stable, and it is not easy to decompose even at high temperature or overcharge. Therefore, it is often used as the positive electrode material of lithium-ion batteries and has a good development prospect. [0003] However, in actual use, once the lithium iron phosphate battery is overcharged, a violent chemical reaction will occur inside the battery, making the heat generation inside the battery far greater than the...

Claims

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Application Information

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IPC IPC(8): G01R31/378G01R31/367
CPCG01R31/378G01R31/367Y02E60/10
Inventor 李建林武亦文王思佳陈光徐亮马速良
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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