Please find enclosed the presentation at the EVS-30 of our innovative solution from DENSO for the efficient preconditioning of EVs

1. Efficient cloud-based cabin preconditioning
for EVs with a compact heat pump system
EVS-30, October 11, 2017
Dr. Andrés Caldevilla
Technology Planning Department
DENSO AUTOMOTIVE Deutschland GmbH

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
Agenda
1. OPTEMUS project technologies
2. Preconditioning strategy
3. Preconditioning HMI
4. Compact Refrigeration Unit (CRU)
5. Evaluation
6. Conclusion
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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
1) OPTEMUS project technologies
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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
2) Preconditioning strategy
I) User-triggered
• User indicates desired “boarding”-time and temperature
• Triggered by the user over app
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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
2) Preconditioning strategy
II) Predictive
• Vehicle foresees driver’s approach and starts the preconditioning process correspondingly
• Event-triggered (events defined in user’s profile)
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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
2) Preconditioning strategy
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II.a) Predictive

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
2) Preconditioning strategy
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II.b) Pseudo-predictive

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
3) Preconditioning HMI
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I) User-triggered

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
3) Preconditioning HMI
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II.b) Pseudo-predictive

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
3) Preconditioning HMI
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IFPEN
servers
Eco-routing functionality

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
4) Compact Refrigeration Unit (CRU)
Water-to-Water heat-pump system
• two-plate type heat exchangers
• water-glycol mixture as fluid
• natural gas as refrigerant
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ECM
Invert
er
HVAC
Battery
CRU
Engine
TMECU

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
5) Evaluation → Strategy simulation
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Energy reduction of 46% can be achieved by preconditioning succesively
with the blower and the CRU
• Mid-sized vehicle, 35°C ambient temperature, 40% relative humidity, 800W/m2 sun load

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
5) Evaluation → Prototype testing
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RadiatorHVACCRU
Ambient
Heating
with de-humidification
Dehumidification
RadiatorHVACCRU
Ambient
Cooling
with de-humidification
Dehumidification
𝑇𝑐𝑎𝑏
∗
= 20°C 𝑇𝑐𝑎𝑏
∗
= 20°C
𝑇𝑎,𝐻𝐶,𝑜𝑢𝑡 𝑇𝑎,𝐻𝐶,𝑜𝑢𝑡
Cabin Cabin
𝑇𝑎𝑚𝑏 = −10°𝐶 𝑇𝑎𝑚𝑏 = 30°𝐶
𝑇𝑎,𝐶𝐶,𝑜𝑢𝑡 𝑇𝑎,𝐶𝐶,𝑜𝑢𝑡
The CRU increases the driving range by 31% compared to PTC-heater

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EVS-30 / October 11, 2017 / Dr. Andrés Caldevilla / DENSO AUTOMOTIVE Deutschland GmbH
© DENSO COPORATION All RightsReserved.
6) Conclusion
DENSO has developed a compact and efficient Water-to-Water heat-pump
system based on natural refrigerant
• Full cabin cooling and heating power possible in range from -20° to 40°C
• All modes possible to realize with water shut-valves and tacting control of valves
• Easy to install and well established control for water management
Next steps
• Design optimization
• Control
o Multiple-in-Multiple-out control on water circuit and HVAC-unit
o Proportional valves implementation
• Integration
o Battery pack conditioning
o Excess heat harvesting optimization
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