1. 智慧型電池串之等化控制及充電控制研究 李永勳 王大同 輔仁大學 電機工程學系碩士班 Introduction
李永勳 王大同
輔仁大學 電機工程學系碩士班
註明此篇研究成果的出處(向右對齊)，例如：7th International Heat Transfer Conference, Washington, DC, USA, vol. 2, pp , July 1982.
Introduction
‧The voltage in one battery cell is inherently low, series battery cells are usually employed for many
　　　practical applications such as electric vehicles (EVs), electric scooters (ES), electric wheelchairs,
　　　electric bike systems, and so on.
‧Cell voltage imbalances are caused by the differences in cell capacities, internal resistance, and the
　　　ambient temperature during charging or discharging.
Fig 6:The boundary conditions
of CICM and DICM
Fig 7:The boundary conditions
of CICM and DCVM
Table 2: Action compare table
‧Imbalanced cell voltage will cause over charging or deep-discharging, and
decrease the total storage capacity and lifetime of the battery.
‧Voltage monitoring, equalization circuits, and battery management
systems have been presented to prevent imbalances
SIMULATION AND EXPERIMENT RESULTS
n-1
n-2
Output state and Driving
Signal Generator
PWM Control
Fuzzy Logic Equalization Controller and Microprocessor based Battery
Management System
Sensor of Battery states
BC1
BC2 Q1 Q2
SC1
SC2 C1
VB1
VB2 D1 D2
Fig8：CICM Simulation results of inductor L1 (VB1>VB2>VB3 )
Fig9：CICM Simulation results of inductor L2 (VB1>VB2>VB3 )
Fig10：DICM Simulation results of inductor L1 (VB1>VB2>VB3 )
Fig 1： System configuration of battery strings
Fig 2: Principle of capacitor energy transferred
battery balancing system
THE PROPOSED FULL DUTY ENERGY TRANSFERRING EQUALIZER
5V/div 、1A/div 、25us/div
5V/div 、1A/div 、20us/div
‧We proposed a complete cell voltage balancing is modified from the converter
‧The cell voltages are controlled by the driving pulse width modulation (PWM) signals
‧The cell voltage are balanced by the fuzzy logic equalization controller and
a microprocessor
Fig11：CICM experimental results of inductor L1 (VB1>VB2>VB3 )
Fig12：CICM experimental results of inductor L2 (VB1>VB2>VB3 )
Fig13： DICM experimental results of inductor L1 (VB1>VB2>VB3 ) P2
THE PROPOSED ZVS SOFT-SWITCHING SYSTEM P6
‧This technique is easily achieved by setting in the short off interval
(dead time) which adding resistance and diode during commutation of the
complimentary pair MOSFET
Li-Ion Battery Management
System (Li-Ion BMS)
Sensing of cell voltage
DC2
DC1
DC3
DC4
DS1
DS2
DS3
DS4
RS1
RS4
RS2
RS3
RG1
RG2
RD1
RD2 C2 C1 L1 L3 L2 L4
SC1
SC2
SC3
SC4
VB1
VB2
VB3
Fig14：DICM simulation results of inductor L2 (VB1>VB2>VB3 )
Fig15：DCVM simulation results of capacitor Vc (VB1>VB2>VB3 )
Fig16：DCVM simulation results of sw iT、VT (VB1>VB2>VB3 )
Fig 3: Principle of capacitor energy transferred battery balancing system
5V/div 、1A/div 、25us/div
5V/div 、1A/div 、20us/div
5V/div 、1A/div 、20us/div
Fig17： DICM experimental results of inductor L2 (VB1>VB2>VB3 )
Fig18： DCVM experimental results of capacitor Vc (VB1>VB2>VB3 )
Fig19：DCVM experimental results of sw iT、VT (VB1>VB2>VB3 )
DESIGN OF FUZZY LOGIC CONTROLLER
‧The FLC consists of the (1)fuzzy rule base (2)inference engine (3)fuzzification and (4)defuzzification
‧We use fuzzy rule base to describe the knowledge and experience of the battery equalization P7 P3
Fig 20:Simulation results for VB1>VB2 >VB3
Fig 21：Without FLC-BEC VB1>VB2 >VB3
Fig22With FLC-BEC for VB1>VB2 >VB3
CONCLUSION
‧The equalizer operation in full duty cycle, so the efficient and equalizing time of the proposed
battery equalization system is improved.
‧The ZVS soft-switching is really reduced power loss about 30%.
‧ The proposed FLC-BEC is not only used to maintain the equalizing process operation in safe
region but also reduced the equalizing period about 16%.
Fig 4:Basic definition diagram of
the FLC
Table 1: Control rule base of the
FLC-BEC for linguistic variable
Fig 5: IBEC with respect to Vd
and VB