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  5.  Toyota MIRAI 2 2021MY (EU)
Toyota MIRAI 2 2021MY (EU)
Specification
Fuel Cell Type Polymer electrolyte
Number of cells 330
Max output (kW/DIN hp) 128/174
Power density (kW/l) 5.4
Fuel tank capacity (kg) 5.6
Volume (litre) 142.2
HV Battery Type Lithium-ion
Nominal voltage (V) 310.8
E-Motor Type PMSM
Max. power (kW/DIN hp) 134/182
Max. torque (Nm) 300

Key Features

  • The MIRAI 2 is developed based on Toyota's modular GA-L platform.
  • The new platform allows the addition of a third hydrogen fuel tank, extending the driving range by 30% to approximately 650 km.
  • The fuel cell system has been completely redesigned, significantly reducing the size and weight of key components.
  • By mounting a fully redesigned fuel cell electric powertrain on the GA-L vehicle platform, the MIRAI 2 achieves an ideal 50:50 chassis balance.

Fuel Cell System Integration

  • Main components of the MIRAI 2 fuel cell system are installed at front compartment of the vehicle above the front axle.
  • The fuel cell stack and the FC boost DC/DC converter are stacked on top of each other
  • The FC boost converter contains:
    • DC/DC converter to boost FC voltage to 650V
    • Other power electronics components like inverter stages of e.g. coolant pumps

Power Unit

  • Different power electronics functions are integrated within one power unit in a highly integrated approach.
    • DC/DC converter HV to 12 V board net
    • DC/DC converter for HV battery
    • Inverter traction motor
    • Inverter fuel cell air compressor
  • Denso power card modules enable double-sided cooling for semiconductors.
  • The multipiece housing consists of cast and sheet metal components.

Electric Drive Unit (EDU)

  • MIRAI 2 is driven by an electric motor at the rear axle with maximum power of 134 kW.
  • The electric drive unit (EDU) including electric motor and 1-speed gearbox is cooled using a separate oil circuit consisting of:
    • Electrical oil pump mounted to the EDU
    • Two oil coolers mounted behind rear wheel housings using air as cooling medium
  • Lubrication of gearbox is realized with internal mechanical oil pump.
  • Park lock system is integrated into gearbox.

Fuel cell

  • Proton-exchange membrane fuel cell is used for MIRAI 2.
  • Different media are supplied through cutouts.
  • 330 cells are connected in series, which is 40 cells less compared to MIRAI 1.
  • One fuel cell consists of different subcomponents.
    • Semi-bipolar plates (Cathode + Anode side)
    • Rubber gasket between cells
    • Subgasket between bipolar plates
    • Gas diffusion layer + Microporous layer
    • Membrane electrode assembly

Benchmarking Report Overview

The following reports are available:

  • M1.1 – Level-1 Benchmark
    Level-1 benchmark delivers a first vehicle overview and comparison of key performance indicators within FEV scatter bands.
  • M2 - Operations & Consumption
    Detailed investigation of the Hybrid operation strategy & Energy management
  • M3 – Fuel Cell System Evaluation
    Comprehensive insights into system performance, efficiency and fuel cell operation strategy
  • M4 – Fuel Cell System Teardown, Design & Cost BMK
  • M5 - Electric Powertrain Component Teardown, Design & Cost BMK
  • M6 - Acoustics & NVH
  • M7 - Powertrain Thermal Management
  • M8 - Compressor Analysis & Mapping
    Compressor benchmarking of aerodynamics, acoustics and electronics
  • M9 - Fuel Cell Stack Investigation
    Fuel Cell stack mapping and efficiency investigations

For further details including content and price, please contact:

MarkLines Co., Ltd., Consulting Services Department
Person in charge: Mr. Usuba
TEL：(03) 4241-3906
FAX：(03) 4241-3900
e-mail：[email protected]

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