Monolithic Power Systems, Inc. · NASDAQ:MPWR
Monolithic Power Systems — Technical Presentation (June 2023)
17 slides from Monolithic Power Systems's technical presentation, June 2023
Slide 1: MPS Battery Management BMS System Webinar
MPS Battery Management BMS System Webinar Key Considerations when Designing Battery Management June 2023 Webinar will begin at 10:00 AM CEST | 1:00 AM PDT | 4:00 AM EDT
Slide 2: Presenters Introduction
Presenters Introduction Albert Rodriguez Miguel Angel Sanchez • Senior Battery Applications Engineer • MPS Battery Applications Engineer since 2020 at MPS since 2019 • Deeply involved in: • MS and PhD in battery controls at UCCS • Creating reference designs and complete BMS • Deeply involved in: sol
Slide 3: BMS Design Key Considerations
BMS Design Key Considerations BATTERY BALANCING PROTECTION BATTERY MONITORING SOC/SOH AND FAULT ESTIMATION AND MORE… DIAGNOSIS APP-SPECIFIC SYSTEM TASKS INTERFACE
Slide 4: BMS Target Applications
BMS Target Applications Power Tools E-Bikes Datacenters Forklifts Portable Vacuums Pedelecs Medical Pallet Jacks Residential Gardening Tools Mopeds Security AGVs Commercial Scrubbers Scooters Lighting Robotics Utility Sweepers Golf Carts A/V Equipment Drones 5 to 24 Cells 10 to 24 Cells 14 to 22 Cel
Slide 5: BMS Architecture Example
BMS Architecture Example r Pack+ Pack- T Battery Monitor & Protector T F B a 4 ) c 3% o $3 £ “Oo 8b o & £9 2 wn => >" .“ vu 2 £ g 2 = mrS
Slide 6: Key BMS Components
Key BMS Components T.9 OLA ral aK? mrS
Slide 7: Battery Monitor & Protector
Battery Monitor & Protector SendHigh-Resolution Take High Resolution Measurements Measurements Fault Detected Fault Detected Open Open Protections Protections Send Information Information Analyze Analyze Balancing Balancing
Slide 8: Battery Monitor & Protector Key Features
Battery Monitor & Protector Key Features Integrated High-Side MOSFET Driver Soft Start Capability Pack+ VGATE 0.2mF CHG DSG to V TOP 10mF C16 VBUS CL PACKP MP2797 C0 AGND SRP SRN Pack-- Synchronous Readings True Hardware Protection
Slide 9: BMS Microcontroller
Battery Monitor & L Protector Pack- Fuel Gauge
Slide 10: Considerations for Fuel Gauging
Considerations for Fuel Gauging ? MPS Cell Model CELL CHARACTERIZATION AND MODEL EXTRACTION
Slide 11: Fuel Gauge Methods
Fuel Gauge Methods Coulomb Counting (CC) Method CC + OCV Method MPS Hybrid Method • Inputs: current • Inputs: current, voltage, OCV • Inputs: synchronous current + characterization voltage, temperature, cell • Assumption: total capacity of model battery never changes under • Assumption: Total capaci
Slide 12: Fuel Gauge MPS Hybrid Method
Fuel Gauge MPS Hybrid Method Cell-Level Quantities + Application Usage = Pack-Level Quantities Charger 1C Pack State-of-Charge (SOC) + 100% Unavailable State-of-Charge 52% 15ºC 3.62V - + Runtime & Charge Time 56% 18ºC 3.68V - … 60% Power Limits + 54% 16ºC 3.66V - 0% State-of-Health (SOH) Load Impeda
Slide 13: Component Considerations
Component Considerations BATTERY MONITOR FUEL GAUGE mrS
Slide 14: BM & Fuel Gauge Influence on SOC Accuracy
Conditions: • New Battery BM & Fuel Gauge Influence on SOC Accuracy • 50% Initial SOC • 25ºC • 15min Relaxations • 10 Cycles NMC Chemistry Example LFP Chemistry Example • 20mA Current Offset Coulomb Counting CC + OCV corrections MPS Hybrid Method Coulomb Counting CC + OCV corrections MPS Hybrid Meth
Slide 15: Summary
T.9 ral ram Summary
Slide 16: MPS Offers BMS Complete Solution
MPS Offers BMS Complete Solution BM&P Fuel Gauge Stacked MP279x 70A Continuous Current for 17-cell to 32-cell applications Standard BMS board 50A Continuous Current Cell & Component BMS Design & Requirements Validation Selection Configuration Complete Solution 100A Continuous, 180A Peak Current
Slide 17: Q&A
Q&A mrS
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