H2020Индивидуална стипендия2018–2020

LIB STRESS · In situ stress analysis of lithium-ion battery cell

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-07-30 → 2020-07-29
Финансиране от ЕС: 195 455 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Литиево-йонните батерии се анализират при екстремни условия, за да се проследи как се развива прегряването и отделянето на газове. Това помага за по-доброто разбиране на причините за пожари и експлозии в електрически автомобили, телефони и системи за съхранение на енергия.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

In situ stress analysis of lithium-ion battery cell

Thermal runaway may occur for a lithium ion battery (LIB) cell when its temperature exceeds a certain value. The temperature of the LIB cell depends on the heat balance between its heat production and heat dissipation. The temperature inside the cell is difficult to measure because it is sealed. However, surface temperature, which can give a warning sign before failure of the cell, can be easily measured and used to provide an indication of cell internal temperature. Work is also ongoing correlating such warning signs with battery failure. Lithium-ion batteries (LIB) play a pivotal role in the electrification of transport and energy storage systems (ESS) as well as in consumer market. However, the recurrent re and explosion incidents involving LIBs in mobile phones, laptops, electric vehicles (EVs), hybrid EVs, airplanes and ESS have raised increasing concern regarding their safety. When LIBs are subjected to abuse conditions, thermal runaway (TR) may be induced, leading to fire and even explosions. In such scenarios, multiple electrical, electrochemical, physical, and chemical processes take place simultaneously across different scales. The Fellowship aims to analyse the thermal behaviour of lithium ion cells during abuse conditions and thermal runaway, giving particular focus to the evolution of thermal runaway and the resulting gases emissions and fires. The specific objectives of the research include: - Investigate LIB cell temperature changes under thermal abuse. - Improve both OpenFOAM and COMSOL to study the TR evolution. - Validate the above predictions with published data and new data to be generated in collaboration with others. - Investigate the combined effects of electrochemical, mechanical and thermal on LIB behaviour and performance. - Seek collaboration with industrial partners to give the research an industrial dimension.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Lithium-ion batteries (LIB) are found in many applications such as consumer electronics, electric vehicles and airplanes. However, despite of the high safety standards being imposed, there have been many reported accidents as well as recalls by some manufacturers. Most accidents can be sourced to runaway reactions, which could happen if the LIBs are overheated or overcharged. Thermal runaway can cause rapid temperature rise in the LIB, resulting in excessive thermal stress in the electrodes and the separator, a permeable membrane placed between the anode and cathode. Such mechanical degradation can cause the fading of battery capacity, and in extreme cases result in cell rupture, releasing of flammable gases, fire and explosions. The proposed research is aimed at analysing the thermal behaviour and structure response of LIB cells during charge and discharge cycles as well as abnormal conditions such as overcharging and under impact by a projectile. The cutting edge phase field model (PFM) will be combined with multi-physics finite element code COMSOL to analyse the deformation induced stresses induced by insertion of lithium in the electrodes under constraints and high temperatures as well as the resulting crack or microfracture in the electrode materials. The PFM is different from discrete fracture and continuum damage models and ideal for dealing with branch crack and multiple crack problems. The specific objectives of the research include: - Investigate LIB cell temperature changes under abnormal conditions such as overcharging and under impact by a projectile.- Implement the PFM in COMSOL to handle the electrochemical reaction on surfaces, phase interfaces and crack surfaces in lithium ion battery electrode particles. - Validate the above with published results and new data to be generated by partner organisation. - Investigate the combined effects of electrochemical, mechanical and thermal on LIB behaviour and performance. - Final analysis and report.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITY OF WARWICK · COVENTRYКоординаторОбединеното кралство