Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> Battery
When the concentration of a gas is below its lower flammable limit and the content of a liquid is below its minimum explosible concentration, their combined fuel mixture can be ignitable. The flammability characteristics and inhibition strategies for battery emission mixtures deserve further in-dept...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
|
| Series: | Batteries |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2313-0105/10/12/423 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850036377563955200 |
|---|---|
| author | Yan Wang Zhaozhi Zhang Ruiguang Yu Yalun Li Hewu Wang Languang Lu Xuning Feng Minggao Ouyang |
| author_facet | Yan Wang Zhaozhi Zhang Ruiguang Yu Yalun Li Hewu Wang Languang Lu Xuning Feng Minggao Ouyang |
| author_sort | Yan Wang |
| collection | DOAJ |
| description | When the concentration of a gas is below its lower flammable limit and the content of a liquid is below its minimum explosible concentration, their combined fuel mixture can be ignitable. The flammability characteristics and inhibition strategies for battery emission mixtures deserve further in-depth research attention. This article presents experimental research on the ignition characteristics and inhibition strategy for a venting emission mixture of a failure LiFePO<sub>4</sub> battery. By identifying the components of venting emissions, ignition experiments for gases, electrolyte mist, their combination fuels, and mixtures with additives are performed to determine the flammable parameters, including ignition sensitivity and severity. The hybrid combination of non-flammable venting gases and electrolyte mist has the potential to induce ignition. However, there still exists a non-ignition region, where the gas concentration ratio (m<sub>g</sub>) is below 0.15 and the liquid concentration ratio (m<sub>l</sub>) is below 0.1. A safety design principle can be proposed: increasing ignition temperature, prolonging ignition time, and reducing maximum pressure. Adhering to this principle, a non-flammable electrolyte consisting of 1 mol LiPF<sub>6</sub> in EC:DEC = 1:1 vol%, with FEC at 10% and VC at 1%, can be considered as an optimization strategy. In comparison to the original gas–liquid mixtures, the region where no ignition occurs becomes wider when both the m<sub>g</sub> is below 0.45 and the m<sub>l</sub> is below 0.3. The new two-phase mixture has an ignition temperature of 835 °C, which is, respectively, 50% higher than that of the original mixture. Overall, this experimental research demonstrates an innovative methodology for assessing the battery venting emission mixture safety while proposing a design principle for modifying non-flammable electrolyte functional materials. Consequently, these findings can contribute to formulating more suitable preventive and protective measures for commercial electric vehicles and battery energy storage systems’ thermal safety designs. |
| format | Article |
| id | doaj-art-754ccd0c3aad4950b3d7d987f3a400a5 |
| institution | DOAJ |
| issn | 2313-0105 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj-art-754ccd0c3aad4950b3d7d987f3a400a52025-08-20T02:57:12ZengMDPI AGBatteries2313-01052024-11-01101242310.3390/batteries10120423Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> BatteryYan Wang0Zhaozhi Zhang1Ruiguang Yu2Yalun Li3Hewu Wang4Languang Lu5Xuning Feng6Minggao Ouyang7School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaState Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, ChinaWhen the concentration of a gas is below its lower flammable limit and the content of a liquid is below its minimum explosible concentration, their combined fuel mixture can be ignitable. The flammability characteristics and inhibition strategies for battery emission mixtures deserve further in-depth research attention. This article presents experimental research on the ignition characteristics and inhibition strategy for a venting emission mixture of a failure LiFePO<sub>4</sub> battery. By identifying the components of venting emissions, ignition experiments for gases, electrolyte mist, their combination fuels, and mixtures with additives are performed to determine the flammable parameters, including ignition sensitivity and severity. The hybrid combination of non-flammable venting gases and electrolyte mist has the potential to induce ignition. However, there still exists a non-ignition region, where the gas concentration ratio (m<sub>g</sub>) is below 0.15 and the liquid concentration ratio (m<sub>l</sub>) is below 0.1. A safety design principle can be proposed: increasing ignition temperature, prolonging ignition time, and reducing maximum pressure. Adhering to this principle, a non-flammable electrolyte consisting of 1 mol LiPF<sub>6</sub> in EC:DEC = 1:1 vol%, with FEC at 10% and VC at 1%, can be considered as an optimization strategy. In comparison to the original gas–liquid mixtures, the region where no ignition occurs becomes wider when both the m<sub>g</sub> is below 0.45 and the m<sub>l</sub> is below 0.3. The new two-phase mixture has an ignition temperature of 835 °C, which is, respectively, 50% higher than that of the original mixture. Overall, this experimental research demonstrates an innovative methodology for assessing the battery venting emission mixture safety while proposing a design principle for modifying non-flammable electrolyte functional materials. Consequently, these findings can contribute to formulating more suitable preventive and protective measures for commercial electric vehicles and battery energy storage systems’ thermal safety designs.https://www.mdpi.com/2313-0105/10/12/423lower flammable limitventing emissionignition sensitivityignition temperature |
| spellingShingle | Yan Wang Zhaozhi Zhang Ruiguang Yu Yalun Li Hewu Wang Languang Lu Xuning Feng Minggao Ouyang Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> Battery Batteries lower flammable limit venting emission ignition sensitivity ignition temperature |
| title | Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> Battery |
| title_full | Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> Battery |
| title_fullStr | Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> Battery |
| title_full_unstemmed | Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> Battery |
| title_short | Experimental Research on the Ignition Characteristics and Inhibition Strategy for Venting Emissions Mixture of Failure LiFePO<sub>4</sub> Battery |
| title_sort | experimental research on the ignition characteristics and inhibition strategy for venting emissions mixture of failure lifepo sub 4 sub battery |
| topic | lower flammable limit venting emission ignition sensitivity ignition temperature |
| url | https://www.mdpi.com/2313-0105/10/12/423 |
| work_keys_str_mv | AT yanwang experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery AT zhaozhizhang experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery AT ruiguangyu experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery AT yalunli experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery AT hewuwang experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery AT languanglu experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery AT xuningfeng experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery AT minggaoouyang experimentalresearchontheignitioncharacteristicsandinhibitionstrategyforventingemissionsmixtureoffailurelifeposub4subbattery |