전기화학 셀 모델링
Simscape™ Battery™에는 Simscape 블록 또는 배터리 셀과 연료전지의 동적 모델이 포함되어 있습니다. 이러한 블록을 사용하여 설계와 검증을 위해 셀의 시간 기반 응답이나 주파수 기반 응답을 에뮬레이션할 수 있습니다. 이러한 블록을 기본 요소로 사용하여 배터리 모듈, 배터리 팩 또는 연료전지 스택과 같은 시스템 수준 모델을 구축하기 시작하십시오. 기본적으로 이러한 기본 블록에는 빠르게 실행되는 시뮬레이션에 필요한 가장 기본적인 전기 동특성이 포함되지만, 열 효과와 더 복잡한 전기 파라미터 종속성도 포함될 수 있습니다.
ECM(등가 회로 모델)은 특정 회로 토폴로지로 연결된 저항기, 커패시터, 인덕터 등의 전기 회로 소자 모음을 사용하여 시간에 따른 전압 반응과 같은 전기화학 셀의 동적 동작을 근사합니다. ECM은 실제 전기화학 시스템을 모사한 것입니다. ECM은 시뮬레이션 시간이 더 빠르지만 모델 충실도와 정확도는 더 낮습니다.
전기화학 모델은 배터리 내부의 물리 공정과 화학 공정을 상세하게 표현합니다. 이러한 모델은 전하 및 질량 전달, 반응 속도론, 열역학을 표현할 수 있습니다. 이러한 모델은 연산량이 많으며 파라미터화하기 더 어렵습니다.
Simscape 블록
도움말 항목
- Model PEM Fuel Cell with Membrane Water Dynamics
This example shows how to model a proton-exchange membrane (PEM) fuel cell stack with a custom Simscape™ block. (R2024b 이후)
- Parameterize Entropic Coefficient with Measurement Protocol and Data Analysis
This example shows what experiments to conduct and how to analyze the resulting experimental data for parameterizing the entropic coefficient. (R2024a 이후)
추천 예제
Analyze Battery Spatial Temperature Variation During Fast Charge
How the temperature gradient over the cell surface varies during the fast charging of a battery. Fast charging is one of the key enablers for the adoption of battery electric vehicles. Fast charging pushes a considerable amount of current inside the battery. This process produces a lot of heat. It is important to understand how temperatures spatially vary in a battery and how this affects its long term warranty. Typically, to ensure a good battery life with uniform degradation, the temperature gradient over the cell surface should not exceed around five or six degrees centigrade. This example uses Simscape™ Battery™ to model the cell electrical dynamics and the Partial Differential Equation Toolbox™ to generate the reduced order model (ROM) that describes the battery 3-D thermal model. This example uses a 50 ampere-hour battery (Valence:U27_36XP) and charges it for 10 minutes from an initial state of charge (SOC) of 15%. Then, the example analyzes the maximum gradient in the cell temperature.
Analyze Performance of Vanadium Redox Flow Battery
Model a vanadium redox flow battery (VRFB), calculate the state of charge (SOC), and assess the impact of electrolyte flow rate on the performance of the battery.
Examine Effects of Diffusion Coefficient and Volume Fraction on Battery Terminal Voltage
How the diffusion coefficient and the volume fraction of the electrode active material of a Battery Single Particle block affect the battery terminal voltage.
Model Battery Cycling Aging
Simulate the capacity cycling aging of a battery. Battery aging is a critical factor that affects the performance and lifespan of energy storage systems. As batteries undergo charge and discharge cycles, their components degrade, which leads to a gradual decline in capacity and efficiency. Solid electrolyte interface (SEI), lithium plating, and other side reactions are the main cause of degradation in lithium-ion batteries.
Model Voltage Hysteresis in Battery
Simulate the voltage hysteresis phenomena in rechargeable batteries by using the Battery Equivalent Circuit block. The open-circuit voltage (OCV) is the difference in measured voltage between the battery terminals when the current flow is equal to zero. The OCV is the electromotive force or the rest potential. For rechargeable or secondary batteries such as lithium-ion batteries, the OCV at a given state of charge and temperature state depends on whether you previously charged or discharged the battery. In lithium-ion cells with conventional intercalation electrodes, this discrepancy is typically explained by the presence of different solid phases in the electrode active material, reaction path hysteresis, and related thermodynamic effects. The lithiation and delithiation of an electrode active material during the charge and discharge processes often produce different electrode solid phases at different states of charge depending on battery chemistry.
