LOW TEMP EV TEST FOR EVSACEA TF EV proposal
26 November 2019
WLTP SUBGROUP EVWeb-audio
ProposalTest procedure for PEVs
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In case of an PEV, the application of a fixed factor should be allowed which increases energy consumption and decreases range. [Factor still need to be determined]
PEV’s don‘t have criteria emission which need to be checked during the test, so no need to perform a physical test on the dyno.
Test only for the purpose to derive customer information values
If manufacturer does not want to apply the fixed factor, as this need to be a conservative one, manufacturer shall perform a test according to the procedure described for PEV low Temp Testing in WLTP
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GeneralTEST PROCEDURE FOR PEV
Proposal for -7°C test procedureTEST PROCEDURE FOR PEV
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STP or CCP
Test
EAC,PostTest,-7°C
Recharge EAC
ChargePrecon*
2 WLTC*
Set pointEDC.,-7°C, UBE, etc.
Soak
At least 9h reflecting overnight stay
Soak
EAC,precon.,-7°C
PreCon
Charge
Full charge of REESS[ Connect
within 30min
Road load adjust.
Report time
Test start within30 min
Vehicle Soak at 23°C or lessuntil onboard REESS temperature target reached
>=12h, max. 18h (report time)
Connect within 30min][
*required auxiliarydevices switched on
23°C:• Road load adjustment• [Vehicle soak at 23°C or less
until onboard REESS temperature target reached]
-7°C:• Soak of the vehicle for at least 9h with undefined starting SoC; SoC shall allow to drive at least two WLTC with predominant mode with
required auxiliary devices switched on; time of soak needs to be recorded• Preconditioning drive of 2 WLTC with predominant mode (to simulate a drive home), required auxiliary devices switched on reflecting
user behavior and taking into account cabin isolation & other technologies• Charging and soaking of vehicle (for at least 12h and a maximum of 18h, time needs to be recorded)
• First: Charging of REESS until REESS is fully charged (note: recharged energy not measured)• Second (after having finished charging): Soak of vehicle representing an overnight stay
soak starts with fully charged REESS only energy used for REESS pack conditioning and cabin conditioning etc. recorded
• Test procedure at -7°C with required auxiliary devices switched on• Measurement of recharged energy EAC,PostTest,-7°C after test at -7°C • EAC for the calculation schemes: EAC = EAC,precon,-7°C + EAC,PostTest,-7°C• To be discussed: required values to be calculated at -7°C as final test results
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Temp: -7°C
Temp: 23°C
Timeline example based on proposed procedureTEST PROCEDURE FOR PEV
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Soak (9h) Precon of 2 WLTC (1h) Charge and Soak (12h) STP (10h) Charge (6h)
Day 1:8:00 CET
Day 1:17:00 CET
Day 1:18:00 CET
Day 2:06:00 CET
Day 2:16:00 CET
Day 2:22:00 CET
Feasibility check of procedure under real lab conditions
Temp: -7°C
Temp: 23°C
Challenges with STP at Low TempTEST PROCEDURE FOR PEV
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CSCM@89 km/h
CSCE@89 km/h
Segment 1 Segment 2
100 km/h 100 km/h
30 km 30 km
Must satisfy< 10% of UBE
Exemple: 200 km WLTC range at 23°C => 120 km WLTC range at -7°C
48 km for 28 minutes 12 km for 7 minutes
2nd constant speed cycle will be very difficult to perform Combining the 2 constant speed segments at the end can provide a good solution Might situations where STP can be performed at 23°C but is not possible to be performed at -7°C
If 23°C STP is used for low temperature, what are the problems?
Challenges with STP at Low TempTEST PROCEDURE FOR PEV
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23°C findings as basis for a solution how to PEV test at Low Temp
CSCM@89 km/h
CSCE@89 km/h
Segment 1 Segment 2
100 km/h 100 km/h
UBE
UBE
Energy Consumption Energy Consumption
Energy Consumption
Range: 169.61 km EC DC : 196 Wh/ km
Range: 167.99 km EC DC : 197 Wh/ km
……
Range: 170.33 km EC DC : 196 Wh/ km
CCP:
STP:
Not in regulation, for comparison only:
*values based on one low range PEV
CCP and STP are providing the same test results, to avoid cherry picking regulation defined a threshold concept when which procedure shall be selected For comparison, an alternative set up of STP is provided above at the bottom of the box All procedure set ups provide the same test results which is important regarding the -7°C test procedure set up
Challenges with STP at Low TempTEST PROCEDURE FOR PEV
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Possible solution for the problems to perform STP at Low Temp
STP might be difficult to perform at -7°C (even if done at 23°C) due to the higher electric energy consumption To avoid the situation to run into problems, proposal is to drive the dynamic segments at the beginning and the constant speed segments in 1 piece at the end
UBE can be measured at -7°C
CSCM@89 km/h
CSCE@89 km/h
Segment 1 Segment 2
100 km/h 100 km/h
UBEEnergy Consumption Energy Consumption
Difficult to perform
CCP:
STP:
Idea for Low Temp Testing of PEV:
-7°C
-7°C
Range: 107.92 km EC DC : 288.07 Wh/ km
UBEEnergy Consumption
Range: 108.07 km EC DC : 287.69 Wh/ km
*values based on one low range PEV
-7°C
ProposalTest procedure for OVC-HEVs
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Slide 11: independent CD-Test Slide 12: independent CS-Test
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GeneralTEST PROCEDURE FOR OVC-HEV
Proposal for -7°C CD-test procedureTEST PROCEDURE FOR OVC-HEV
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23°C:• Road load adjustment• [Vehicle soak at 23°C or less
until onboard REESS temperature target reached]
-7°C:• Soak of the vehicle for at least 9h with undefined starting SoC; SoC shall allow to drive at least two WLTC with predominant mode with
required auxiliary devices switched on; time of soak needs to be recorded• Preconditioning drive of 2 WLTC with predominant mode (to simulate a drive home), required auxiliary devices switched on reflecting
user behavior and taking into account cabin isolation & other technologies• Charging and soaking of vehicle (for at least 12h and a maximum of 18h, time needs to be recorded)
• First: Charging of REESS until REESS is fully charged (note: recharged energy not measured)• Second (after having finished charging): Soak of vehicle representing an overnight stay
soak starts with fully charged REESS only energy used for REESS pack conditioning and cabin conditioning etc. recorded
• Test procedure at -7°C with required auxiliary devices switched on• Measurement of recharged energy EAC,PostTest,-7°C after test at -7°C • EAC for the calculation schemes: EAC = EAC,precon,-7°C + EAC,PostTest,-7°C• To be discussed: required values to be calculated at -7°C as final test results
Temp: -7°C
Temp: 23°C
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reflecting overnight stay
CD-Test
Test
Soak
EAC,PostTest,-7°C
Recharge
Charge
EAC,precon.,-7°C
PreCo optional
Charge
Full charge of REESS
Raw data from testSet point
Road load adjust.
Vehicle Soak at 23°C or less
until onboard REESS temperature target
reached
Precon*
2 WLTC
Soak
At least 9h
Report time
Connect within 30min
Test start within30 min
Connect within 30min][
>=12h, max. 18h (report time)
*required auxiliarydevices switched on
Proposal for -7°C CS-test procedureTEST PROCEDURE FOR OVC-HEV
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23°C:• Road load adjustment• [Vehicle soak at 23°C or less
until onboard REESS temperature target reached]
-7°C:• Soak of the vehicle for at least 9h with undefined starting SoC; time of soak needs to be recorded• Preconditioning drive of n WLTC, last driven WLTC shall fulfil REEC < ?% (to simulate a drive home and coming home in CS condition
and forgetting to plug in the car), required auxiliary devices switched on; • Soaking of vehicle (for at least 12h and a maximum of 18h, time needs to be recorded); soaking of vehicle reflects an overnight stay
without charging• Test procedure at -7°C with required auxiliary devices switched on
Temp: -7°C
Temp: 23°C
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Precon*
n WLTC, last REESS WLTC REEC < ?% reflecting overnight stay
CS-Test
Test
1 x WLTC
SoakSoak
At least 9h
Set point
Road load adjust.
Vehicle Soak at 23°C or less
until onboard REESS temperature target
reached
Report time
Test start within30 min
>=12h, max. 18h (report time)
*required auxiliarydevices switched on
][
Timeline example based on proposed procedureTEST PROCEDURE FOR OVC-HEV
13
Feasibility check of procedure under real lab conditions
Temp: -7°C
Temp: 23°C
Soak (9h) Precon of 2 WLTC (1h) Charge and Soak (12h) CD-Test (4h) Charge (4h)
Day 1:8:00 CET
Day 1:17:00 CET
Day 1:18:00 CET
Day 2:06:00 CET
Day 2:10:00 CET
Day 2:14:00 CET
Soak (9h) Precon of 4 WLTC (2h) Soak (12h) CS-Test (0,5h)
Day 1:8:00 CET
Day 1:17:00 CET
Day 1:19:00 CET
Day 2:07:00 CET
Day 2:07:30 CET
Independent CD-Test
Independent CS-Test
ProposalFamily concept
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Still under discussion in ACEA TF EV – will be provided as soon as available
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Proposal for PEVsLOW TEMP FAMILY CONCEPT FOR EV
Still under discussion in ACEA TF EV – will be provided as soon as available
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Proposal for OVC-HEVsLOW TEMP FAMILY CONCEPT FOR EV
ProposalAuxiliary devices activation
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Still under discussion in ACEA TF EV – will be provided as soon as available
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ProposalAUXILIARY DEVICE ACTIVATION