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Battery Cooling System 1 VCC BATTERY COOLING SYSTEMS
Transcript of VCC BATTERY COOLING SYSTEMS - gtisoft.com · Battery Cooling System Dynamic Modelling of Battery...
Battery
Cooling
System
1
VCC BATTERY COOLING SYSTEMS
Battery
Cooling
System
Dynamic Modelling of Battery Cooling
Systems for Automotive Applications
A master’s thesis carried out 2013 at VCC by:
Fabian Hasselby
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Battery
Cooling
System
Agenda
• Project Background
• Calibration
• Component Modelling
• Conclusions
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Background Calibration Component Modelling
Conclusions
Battery
Cooling
System
External HX
Chiller
Pump
Project Background
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Battery
Battery
Cooling
System
Project Background
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Battery
Cooling
System
Project Background
• Thermal management of battery systems is vital
• Optimum temperature range for Li-ion cells: 20 - 40 °C
• Thermal generation in battery cells
• Reaction heat, Joule heating, Polarisation heat
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Battery
Cooling
System
Project Background
Objective of this study
• Develop an accurate model of the battery cooling system
• Balancing task focused on reducing the energy demand of
the system
Methodology
• Gather information and data regarding the system and its
components
• Model system components separately and combine these
later to from the overall system.
• Apply calibration methods to improve model predictions
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Battery
Cooling
System
- Calibration
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Background Calibration Component Modelling
Conclusions
Battery
Cooling
System
Calibration
Correlating model predictions to empirical data
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Battery
Cooling
System
Calibration
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DOE (Design of Experiments)
Battery
Cooling
System
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- Component Modelling
Background Calibration Component Modelling
Conclusions
Battery
Cooling
System
Component Modelling – Chiller
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Chiller
Battery
Cooling
System
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1 Pass- 3 Pass Plate Heat Exchanger
Component Modelling – Chiller
Battery
Cooling
System
• Nusselt heat transfer correlation for single phase
[Coolant Turbulent Coefficient]
[Coolant Turbulent Exponent]
• Shah-Thome correlation for evaporation in two phase
[Refrigerant Heat Transfer Multiplier]
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Component Modelling – Chiller
Battery
Cooling
System
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Component Modelling – Chiller
Battery
Cooling
System
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Battery
Component Modelling
– Internal Battery Cooling
Battery
Cooling
System
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Component Modelling
– Internal Battery Cooling
Battery
Cooling
System
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Component Modelling
– Internal Battery Cooling
Battery
Cooling
System
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- Conclusions
Background Calibration Component Modelling
Conclusions
Battery
Cooling
System
• Building accurate battery cooling system models for early
vehicle development can be done using 1D CFD modelling
• Having reliable experimental data becomes exceedingly
important when validating and fine-tuning model behaviour
to a high level of accuracy.
• Rigours calibration may, however, not always be necessary
and strongly depends on the detail and the purpose of
modelled system.
• 1D simulation is indispensable when it comes to analysing
large and complex systems
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Conclusions
Battery
Cooling
System
- Thank you for your attention
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