| 王庭华,翟宏举,秦鹏,吴静云,田方媛,郭鹏宇,王青松.模组箱体空间内磷酸铁锂电池热失控及其传播行为研究[J].火灾科学,2022,31(1):25-34. |
| 模组箱体空间内磷酸铁锂电池热失控及其传播行为研究 |
| Study on the thermal runaway and its propagation behaviors of lithium iron phosphate battery in module space |
| |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| DOI：10.3969/j.issn.1004-5309.2022.01.04 |
| 基金项目:国网江苏省电力有限公司科技项目(J2020109) |
| 作者 | 单位 | | 王庭华0 | 国网江苏省电力有限公司经济技术研究院,南京,210008 | | 翟宏举0 | 中国科学技术大学火灾科学国家重点实验室,合肥,230026 | | 秦鹏 | 中国科学技术大学火灾科学国家重点实验室,合肥,230026 | | 吴静云 | 国网江苏省电力有限公司经济技术研究院,南京,210008 | | 田方媛 | 国网江苏省电力有限公司经济技术研究院,南京,210008 | | 郭鹏宇 | 国网江苏省电力有限公司,南京,210024 | | 王青松* | 中国科学技术大学火灾科学国家重点实验室,合肥,230026 |
|
| 中文关键词: 锂离子电池安全 磷酸铁锂 热失控传播 模组 |
| 英文关键词:Lithium ion battery safety Lithium iron phosphate Thermal runaway propagation Module |
| 摘要点击次数: 202 |
| 全文下载次数: 175 |
| 中文摘要: |
| 为了探究储能用锂离子电池在真实应用场景下的热失控及其传播行为特征,选用86Ah方形磷酸铁锂(LiFePO4)电池,对其在热滥用触发方式下的热失控行为及模组箱体空间与开放空间中的传播行为规律进行了实验研究。单体实验结果表明,电池热失控产生的高温烟气会导致模组箱体内沿高度方向出现明显温度梯度,模组底部与顶部温度测点的最大温差达118.4 ℃。传播实验结果表明,模组箱体空间内热失控电池通过产气及喷出高温电解液向其他电池传热,在热失控电池影响下,模组箱体空间内3块电池上表面所能达到的最高温度均高于开放空间实验12 ℃~150 ℃,模组空间内热失控电池向同侧两块电池的传热量高于开放空间实验225 kJ和44.4 kJ。但箱体环境中有限的氧气供给会减缓电池在热失控时的内部放热反应进程,模组箱体空间实验中电池热失控峰值温度较开放空间实验低33 ℃~145 ℃,并且模组箱体空间实验中热失控完全传播所用时间较开放空间实验滞后213 s。研究结果对于锂离子电池模组的安全设计和热失控传播阻隔具有一定的参考价值与指导意义。 |
| 英文摘要: |
| In order to explore the thermal runaway (TR) and its propagation behaviors of energy storage side lithium-ion battery (LIB) in an actual application scene, this paper presents an experimental study of 86 Ah phosphate (LiFePO4) prismatic LIBs in module space and open space to investigate the TR and its propagation behavior features by using a thermal abuse method to trigger TR. Results of the single-cell test show that the high-temperature gas generated by TR can cause a significant temperature gradient in the height direction of battery module space. The maximum temperature difference between the top and bottom of module space reaches 118.4 °C. The TR propagation experimental results show that the heat transfer between the TR cell and other cells through the high-temperature gases and the electrolytes ejected from the TR cell will be increased in module space. Under the heating effect of the TR battery, the maximum temperature of battery upper surfaces in module space is higher 12 ℃~150 ℃ than that in open space. And the heat transferred from the TR battery to the same side two batteries in module space is higher 225 kJ and 44.4 kJ than that in open space. However, the limited oxygen concentration slows the heat generation reaction in the TR battery. In the module space experiment, the TR maximum temperature is 33 ℃~145 ℃ lower than that in the open space, and the entire TR propagation time is increased by 213 s. This study has a certain reference value and provides guidance for the safety design of LIBs modules and TR propagation blocking. |
| 关闭 |
|
|
|
