Impact of high-power charging on the durability and safety of lithium batteries used in long-range battery electric vehicles
| Autor: | Jianqiu Li, Ye Liu, Xiaogang Wu, Yalun Li, Xinying Mo, Jiuyu Du, Minggao Ouyang |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Charge cycle Thermal runaway 020209 energy Mechanical Engineering chemistry.chemical_element 02 engineering and technology Building and Construction Management Monitoring Policy and Law Durability Automotive engineering General Energy 020401 chemical engineering chemistry Heat generation Range (aeronautics) 0202 electrical engineering electronic engineering information engineering Environmental science Fading Lithium 0204 chemical engineering |
| Zdroj: | Applied Energy. 255:113793 |
| ISSN: | 0306-2619 |
| Popis: | Battery electric vehicles with a range of more than 500 km are expected to become increasingly competitive in the future. The energy density of the currently available lithium batteries should be significantly increased to support the operation of such vehicles, and high-power charging is required to reduce the charging time. However, high-power charging may negatively affect the durability and safety of lithium batteries because of increased heat generation, capacity fading, and lithium plating, which can induce the risk of battery thermal runaway. Currently, there are no established boundary conditions for high-power charging or methods for evaluating its risks, especially in case of high-capacity lithium batteries. This study proposes a test procedure for examining the reaction characteristics of the capacity fading and thermal tolerance of lithium batteries that are subjected to high-power charging. Further, the migration characteristics of the temperature threshold of battery thermal runaway are investigated using the proposed procedure. The test results demonstrate that high-power charging significantly impacts the durability and thermal safety of the high-capacity lithium batteries. In particular, the capacity fading rate can reach up to 30% only after 100 charge cycles depending on the battery type. Furthermore, the thermal tolerance can decrease up to 40% by considering the change in the self-heating temperature as an indicator. Based on the study results, it can be concluded that the thermal management systems should be carefully designed to satisfy the high-power charging requirements. Otherwise, the high power charging only can be performed with limited range for battery electric cars with long all electric range. |
| Databáze: | OpenAIRE |
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