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Aging lithium ion battery thermal runaway modeling method

A technology of lithium-ion batteries and modeling methods, applied in the field of thermal runaway modeling of aging lithium-ion batteries

Active Publication Date: 2017-11-24
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing thermal runaway lithium-ion battery model can only regenerate the heat generated by the internal chemical reaction of the battery, but in practical applications, the different aging degrees of the battery have a certain impact on the thermal runaway process of the battery. Therefore, it is necessary to establish a model that includes aging factors. Lithium-ion battery thermal runaway modeling method

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  • Aging lithium ion battery thermal runaway modeling method
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  • Aging lithium ion battery thermal runaway modeling method

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Embodiment Construction

[0017] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0018] The present invention is a thermal runaway modeling method of an aging lithium-ion battery, the process of which is as follows Figure 4 shown, including the following steps:

[0019] S1: Provide a first lithium-ion battery, conduct a discharge capacity test experiment on the first lithium-ion battery, record the discharge capacity C(1), conduct an adiabatic thermal runaway experiment on the first lithium-ion battery, and record the first The temperature T1(t) of the lithium-ion battery at different moments in the thermal runaway heating process.

[0020] S2: Provide the same second, third, fourth... lithium-ion batteries as the first lithium-ion battery, and carry out aging cycle experiments on the above-mentioned second, third, fourth... lithium-ion batteries respectively until their discharge capacity It is (60%~100%)×C(1), stop the aging ...

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Abstract

The invention discloses an aging lithium ion battery thermal runaway modeling method. Data are collected through adiabatic thermal runaway experiments on lithium ion batteries with different degrees of aging. The acquired heat flow curve is subjected to deconvolution analysis, and corresponding data fitting is carried out to acquire the thermal runaway temperature change model of the lithium ion batteries with different degrees of aging. The model introduces the aging factor into a traditional thermal runaway model, which provides an important basis for the simulation and prevention of a thermal runaway process in reality.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a thermal runaway modeling method of an aging lithium-ion battery. Background technique [0002] In recent years, lithium-ion batteries have gradually begun to be commercialized in the energy storage and power supply industries. In the process of large-scale promotion and application, the safety problems of lithium-ion batteries have gradually emerged. Among them, fires and explosions caused by lithium-ion batteries have been frequently reported. In recent years, lithium-ion batteries have begun to be widely used in electric vehicles, and their safety issues have become the focus of attention. [0003] The safety problems of lithium ions are mostly related to the chemical reaction between the battery materials and the generation of a large amount of heat and gas. If the battery is overheated, overcharged, impacted, squeezed, etc., it may cause thermal runaway of the battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/367
Inventor 杨世春周伟韬徐健杨鹏闫啸宇
Owner BEIHANG UNIV