研究离子电池的热辐射耐受性
Mengbai Ma1,2, Shiqiang Wang1,2, Hui Jiang1,2
1State Key Laboratory of Chemical Safety Qingdao 266104 China mamb.qday@sinopec.com.
RSC advances
|August 27, 2025
概括
离子电池 (LIB) 在热失控 (TR) 过程中存在安全风险. 这项研究发现铁 (LFP) 电池比合金 (NCM) 电池具有更好的热辐射耐受性,这对于安全储能和电动汽车至关重要.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 离子电池 (LIB) 对于储能和电动汽车至关重要,但它们的安全性,特别是热失控 (TR),是一个重大问题.
- 在LIB中的TR可能导致危险的火灾和爆炸,因此需要研究它们在各种触发条件下的耐受性.
- 在外部热辐射下了解TR对于设计更安全的LIB系统和操作协议至关重要.
研究的目的:
- 在不同水平的外部热辐射下研究铁 (LFP) 和合金 (NCM) 电池的热逃散耐受性.
- 确定LFP和NCM电池的热辐射耐受性值和区域.
- 在TR之前开发LFP和NCM电池能承受热辐射的预测模型.
主要方法:
- 对LFP和NCM电池进行不同程度的外部热辐射试验.
- 在热失控事件中观察和记录典型现象.
- 基于实验数据的数学模型开发,以预测耐受性持续时间.
主要成果:
- 与NCM电池 (1.158 kW m-2) 相比,LFP电池的热辐射耐受性值更高.
- 对LFP和NCM电池化学物质都确定了明显的热失控现象和耐受性区域.
- 准确的耐受性持续时间预测模型是高适合度 (NCM的R2=0. 96166,LFP的R2=0. 97698) 开发的.
结论:
- 与NCM电池相比,LFP电池在热辐射耐受性方面具有更高的安全性能.
- 开发的预测模型可以在特定的热辐射条件下准确估计热失控的时间.
- 这项研究提供了提高暴露在外部热源下的LIB系统安全设计和操作指南的关键数据.
更多相关视频
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
13.1K
08:42In Situ Gas Analysis and Fire Characterization of Lithium-Ion Cells During Thermal Runaway Using an Environmental Chamber
Published on: March 31, 2023
2.3K
相关概念视频
Resistance
4.6K
When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
4.6K
Resistivity
3.6K
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
3.6K
Absorption of Radiation
819
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
819
Conduction, Convection and Radiation: Problem Solving
1.4K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
1.4K
Radiation: Applications
1.2K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
1.2K
