电池冷却系统的多尺度建模,用于高C率振幅和不均的电池热量生成的电网频率调节
Wenjiong Cao1,2, Yuanyuan Zhou1, Zilun Kuang3
1Lanzhou Jiaotong University, Lanzhou, 730070, Gansu, People's Republic of China.
Scientific reports
|February 22, 2025
概括
电池储能系统 (BESS) 在高C率运行时面临热挑战. 这项研究模拟了热量产生,并评估了离子电池的液体冷却,确保了电网应用中的热均性.
科学领域:
- 储能 储能 储能 储能 储能 储能
- 电化学 电化学 电化学
- 热管理 热管理
背景情况:
- 电网稳定性受到可再生能源整合的挑战,需要电池储能系统 (BESS).
- 在BESS中用于频率调节的高C率操作会导致离子电池的显著热负荷和热梯度.
- 了解和减轻这些热问题对于BESS的性能和寿命至关重要.
研究的目的:
- 为了研究100Ah离子电池的电热特性和不均的热量产生.
- 开发一种适应电流的非均热量生产分布模型.
- 分析各种液体冷却配置对电池模块散热效率的影响.
主要方法:
- 为离子电池开发一种适应电流的非均热量生产分布模型.
- 在电池模块上模拟和分析各种液体冷却配置.
- 在不同的排放速率 (例如4C) 和冷却液流量 (例如3L/分钟) 下评估热性能.
主要成果:
- 4°C的放电导致单个电池的温度增加约20K,温度差异为5K.
- 在3L/分钟的冷却液流量下,单个电池在4C放电期间的温度上升为5K,均度为2K.
- 一个带有二次的连续通道设计增强了传热,在4MW/1MWh系统中保持2K以下的温度差.
结论:
- 有效的液体冷却策略对于管理高功率电池储能系统中的热梯度至关重要.
- 开发的电流适应模型和串行通道冷却设计有助于改善热管理和系统可靠性.
- 优化的热管理确保了电池储能系统在电网应用中的高效运行.
相关概念视频
01:24Fast Decoupled and DC Powerflow
152
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
152
03:12Batteries and Fuel Cells
26.9K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
26.9K
01:28Load-frequency control
116
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
116
01:17Continuous Charge Distributions
6.8K
Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
The electric charge can also be subjected to an analogical...
6.8K
02:47Voltaic/Galvanic Cells
56.5K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
56.5K
01:30Control of Power Flow
247
There are several methods to control power flow in power systems:
247