Lithium ion battery thermal runaway grading early warning method and early warning system

A lithium-ion battery, thermal runaway technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of inability to achieve early warning, early warning and untimely response.

Active Publication Date: 2021-09-03
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, this method can only perform fault detection on the current battery state, and cannot realize early warning, which is prone to problems of early warning and untimely response

Method used

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  • Lithium ion battery thermal runaway grading early warning method and early warning system
  • Lithium ion battery thermal runaway grading early warning method and early warning system
  • Lithium ion battery thermal runaway grading early warning method and early warning system

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with specific embodiments.

[0033] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solutions of the present invention are shown in the specific embodiments, and the related Other details are not relevant to the invention.

[0034] Additionally, it should be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also Other elements not expressly listed, or inherent to the process, method, article, or apparatus are also included.

[0035] During the long-term power supply process of lithium-io...

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Abstract

The invention provides a lithium ion battery thermal runaway grading early warning method and early warning system. According to the method, fault-free battery characteristic elements are adopted to train the thermal runaway prediction capability of a prediction model composed of a long short-term memory network, a time convolutional network and a GRU neural network; and the battery characteristic elements of the to-be-monitored battery in the time sequence are input into the prediction model to obtain a prediction value at a certain moment in a normal state, the prediction value is compared with a collected true value corresponding to the moment, and the fact that the difference between the prediction value and the true value is larger indicates that the thermal runaway risk of the battery is higher. Through the operation, the respective advantages are integrated, and the problem of overlarge coefficient deviation of respective model training is avoided, so that high-precision battery thermal runaway grading detection is realized, and the speed and precision of lithium ion battery thermal runaway early warning are improved.

Description

technical field [0001] The invention relates to the technical field of battery safety early warning, in particular to a hierarchical early warning method and early warning system for lithium-ion battery thermal runaway. Background technique [0002] In recent years, lithium-ion battery energy storage systems have been widely used in new energy grid-connected, micro-grid, smart grid and other areas. Lithium-ion batteries have broad prospects in large-scale energy storage systems due to their high energy density, high conversion efficiency, and fast response. However, with the large-scale application of lithium-ion battery energy storage systems, the safety of energy storage systems has attracted great attention. Through the statistical investigation of accidents, it is found that the thermal runaway of lithium-ion batteries due to their own chemical reactions or external influences has become the main cause of safety problems. After the thermal runaway of the lithium batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06N3/04G01R31/367G01R31/378G01R31/382
CPCG01R31/367G01R31/378G01R31/382G06N3/044G06N3/045G06F18/214
Inventor 曹元成曹志成张炜鑫
Owner HUAZHONG UNIV OF SCI & TECH
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