เปรียบเทียบวิธี

	สถานะการประจุ	แบบจำลองวงจรสมมูลแบตเตอรี่
สาขาวิชา	อุณหพลศาสตร์	อุณหพลศาสตร์
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	2004	2004
ผู้ริเริ่ม	Gregory Plett	Gregory Plett
ประเภท	Estimation algorithm	Battery simulation model
แหล่งต้นตำรับ	Plett, G. L. (2004). Extended Kalman filtering for battery management systems of LiPB-based HEV battery packs. Journal of Power Sources, 134(2), 252-261.	Seaman, C. V., Strutt, A. S., & Murray, A. (2014). Portable and plug-in hybrid electric vehicle battery electric range impacts on U.S. gasoline consumption. Journal of Power Sources, 243, 773-783.
ชื่อเรียกอื่น	SOC, charge estimation	ECM, circuit model, battery model
ที่เกี่ยวข้อง	3	3
สรุป	State of Charge (SOC) is the amount of energy available in a battery or energy storage system, expressed as a percentage of its maximum capacity. Accurate SOC estimation is critical for safe operation: underestimating SOC can cause unsafe discharges, overestimating can cause overcharging. SOC estimation combines current integration (coulomb counting), voltage-based methods, and Kalman filtering to achieve accuracy despite measurement noise and model uncertainties.	The Battery Equivalent Circuit Model (ECM) represents battery electrochemical behavior using an electrical circuit analogy. It includes an ideal voltage source (open-circuit voltage dependent on state of charge), internal resistance(s) for ohmic losses, and capacitive/resistive elements for transient response. ECM enables rapid simulation of battery behavior in electric vehicles, renewable energy systems, and portable devices without solving complex electrochemical equations.