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LOW TEMP EV TEST FOR EVS ACEA TF EV proposal 26 November 2019 WLTP SUBGROUP EV Web-audio
19

LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Nov 17, 2021

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Page 1: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

LOW TEMP EV TEST FOR EVSACEA TF EV proposal

26 November 2019

WLTP SUBGROUP EVWeb-audio

Page 2: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

ProposalTest procedure for PEVs

2

Page 3: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

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

3

GeneralTEST PROCEDURE FOR PEV

Page 4: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Proposal for -7°C test procedureTEST PROCEDURE FOR PEV

4

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

4

Temp: -7°C

Temp: 23°C

Page 5: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Timeline example based on proposed procedureTEST PROCEDURE FOR PEV

5

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

Page 6: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Challenges with STP at Low TempTEST PROCEDURE FOR PEV

6

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?

Page 7: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Challenges with STP at Low TempTEST PROCEDURE FOR PEV

7

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

Page 8: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Challenges with STP at Low TempTEST PROCEDURE FOR PEV

8

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

Page 9: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

ProposalTest procedure for OVC-HEVs

9

Page 10: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Slide 11: independent CD-Test Slide 12: independent CS-Test

10

GeneralTEST PROCEDURE FOR OVC-HEV

Page 11: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Proposal for -7°C CD-test procedureTEST PROCEDURE FOR OVC-HEV

11

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

11

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

Page 12: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Proposal for -7°C CS-test procedureTEST PROCEDURE FOR OVC-HEV

12

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

12

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

][

Page 13: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

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

Page 14: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

ProposalFamily concept

14

Page 15: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Still under discussion in ACEA TF EV – will be provided as soon as available

15

Proposal for PEVsLOW TEMP FAMILY CONCEPT FOR EV

Page 16: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Still under discussion in ACEA TF EV – will be provided as soon as available

16

Proposal for OVC-HEVsLOW TEMP FAMILY CONCEPT FOR EV

Page 17: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

ProposalAuxiliary devices activation

17

Page 18: LOW TEMP EV TEST FOR EVS - Dashboard - UNECE Wiki

Still under discussion in ACEA TF EV – will be provided as soon as available

18

ProposalAUXILIARY DEVICE ACTIVATION