Niche Centers in the Regions for R&D

E-MOBILITY

NICER

Electric Mobility Research and Development Center for the PH Electric Vehicle Industry

Abstract Background

Technical Methodology

 

E-trike Prototype Specifications

1.

Vehicle Control Unit

2.

Battery System and BMS

  • Lithium-ion (LiFeYPO4)

  • 72V 100Ah

3.

Electric Motor

  • AC Induction Motor

  • 3-Phase 5kW 80Nm

  • 3000 RPM rated, 6000 RPM max

4.

Gearbox/Drivetrain

  • Single reduction 12.76:1

  • Rear axle differential assembly

  • 50kph max speed

5.

Motor Controller

6.

  • Input: 48-72V DC nominal

  • 5kW rated output, 0-300Hz 3P

On-board Charger

7.

Charging Ports

  • 2kW charger

  • Regular charging - Mode 3

  • Fast charging - CharM, Mode 4

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5

1

2

6

3

7

4

White Background
Electric Vehicle Prototype Testing
  • Dynamometer for setup in CSU Tuguegarao.

  • UP VRTL dynamometer can be used for initial testing.

  • E-Trike and EV drive cycles already available for laboratory testing.

  • EV testing based on PH (PNS ISO 8714 & 8715) and International protocols (i.e. WLTP, SAE, NEDC, JISHA)

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Abstract Background

Considerations for Battery Sizing

Selection of Battery Bank Voltage

Typical Ratings: 36V / 48V / 60V / 72V
DOE-BEMAC Models: 55V for 68VM / 83V for 69VM
PNS IEC 61851-21: LV Category <60V (48V nominal)
Capacity fade of batteries at high discharge currents (Peukert)

Energy Autonomy of Vehicle

Deployment data for E-Trikes:
          10.4 km/kWh - WB Li-ion 48V100AH
          10.5 km/kWh - SCiB Li-ion 83V40AH
          9.7 km/kWh - Pb-acid 60V55AH
Tricycle daily range requirements: 100 km/day to be competitive
          With 72V100AH @ 80%DoD, E-Trike can cover approximately 60km
          Translates to 1.7 full charges per day to reach 100 km
          Easy to do top-up or even direct full charge with CharM fast charger

Pricing

Normalized pricing of lead-acid vs li-ion to PHP/kWh

Toshiba SCiB Li-ion: 20,000 cycles
@P90k/module; P270k/83V40Ah-3.3kWh
P81.3k/kWh
Winston Li-ion: 5000 cycles
@P5k5/cell; P126k/72V100Ah-7.2kWh
P7.5k/kWh
Xupai lead-acid: 900 cycles
@P7k2/battery; P44k/72V55Ah-3.9kWh
P10.9k/kWh

Usable Energy Capacity

TARGET: 80% DoD for 5000 cycles

5000 cycles =    13.7 years @ 1 cycle per day;
                          6.8 years @ 2 cycles per day;
                          4.6 years @ 3 cycles per day

Form Factor and Weight

E-Trike compartment needs to accommodate battery dimensions

Lead-Acid
Li-ion (WB)
Li-ion (SCiB)
Specific Power
180 W/kg
266 W/kg
3.5 kW/kg
Energy Density
80-90 Wh/L
133 Wh/L
170 Wh/L
Specific Energy
35-40 Wh/kg
90 Wh/kg
84 Wh/kg