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DESIGN AND IMPLEMENTATION A BATTERY MANAGEMENT SYSTEM FOR A MULTI‐FUNCTION POWER CONVERTER
KTH, Skolan för informations- och kommunikationsteknik (ICT).
2014 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
Abstract [en]

This thesis work designed and implemented an advanced Battery Management System (BMS) for a battery package with 96 Lithium-ion battery cells connected in series. The focus of this thesis placed on battery model building, battery balancing algorithm developing, State-of-Charge (SOC) estimation algorithm developing, and implementing software in microprocessor.A set of simulation program is developed to verify the battery model and the algorithms. A battery simulator based on SPICE is built to implement a first order Thevenin dynamic electrochemical model. PID control algorithm is employed in balancing the battery cells. Meanwhile, Extended Kalman Filter (EKF) algorithm is used for estimating the SOC. An interactive web GUI application is also developed for easy control. Software running on STM32F103 microprocessor has been developed to adapt the existing BMS hardware.The simulation result proves that the first order Thevenin dynamic electrochemical model reflect the behavior of a real battery accurately, the PID balancing algorithm is effective to make the battery cells stay in balanced state and the error of EKF SOC estimation algorithm is below 5%.

sted, utgiver, år, opplag, sider
2014. , s. 57
Serie
TRITA-ICT-EX ; 2014:218
Emneord [en]
BMS, SOC estimation, EKF, cell balancing, PID control, SPICE
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-211503OAI: oai:DiVA.org:kth-211503DiVA, id: diva2:1129539
Fag / kurs
Information and Software Systems
Utdanningsprogram
Master of Science - Embedded Systems
Examiner
Tilgjengelig fra: 2017-08-04 Laget: 2017-08-04 Sist oppdatert: 2018-01-13bibliografisk kontrollert

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Totalt: 220 treff
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