FCV development trends and challenges

Automotive industry taking steps towards a hydrogen society

2016/05/19

Summary

FCV Clarity Fuel Cell
Honda FCV Clarity Fuel Cell
Toyota Mirai
Toyota Mirai

 

Summary

 Are fuel cell vehicles (FCVs) the solution to environmental and energy challenges that motorized society is facing? Companies such as Ballard, Daimler, and General Motors (GM), have conducted research on FCVs from many years back. Previously, GM sent researchers to the Los Alamos National Laboratory, which is known for developing nuclear weaponry, to conduct research on fuel cells as part of a national project. Fuel cell powertrains replace the internal combustion engine (ICE), which is the heart of the vehicle, and utilize the electricity generated when hydrogen and oxygen combine to form water to power the drive motor. In rocket science, fuel cells have been researched and put into use by the military and space industries, but there are many challenges remaining that need to be overcome to apply this technology to vehicles for mass consumption. Will fuel cells come into wide use around the world in the same way the Global Positioning System (GPS) did in mobile phones and navigation systems? The debate on which comes first, cars or infrastructure, applies not only to electric vehicles (EVs) but also to FCVs. This report will summarize the trends and challenges of FCV development.

 

Related Reports:

Toyota launches Mirai fuel cell vehicle in December 2014
FC EXPO 2014 and FCV launch plans
Fuel Cell Vehicles: Three OEM groups to reduce development costs



FCV development trends

 At the FC EXPO 2016 Technical Conference in March, Japanese, U.S., and European automakers reported on FCV development trends. All of the companies in attendance have conducted research and development on FCVs for many years. 

GM

 Since the production of its first fuel cell test vehicle in 1964, GM has conducted FCV running tests for a total of 3 million miles as of May 2014. GM announced that it will modify the Chevrolet Colorado pick-up truck into an FCV (first-generation) and provide it to the military on a trial basis in 2016 for 12 months of road testing.

 

2007 Equinox 2016 First-generation
(Military testing)
GM Second-generation goal
(Next generation)
Fuel cell output 93 kW 85-92 kW 80-95 kW
Maximum fuel cell
temperature when cruising
86℃ 95℃ Target: 105℃
Durability 30,000 miles
(1,500 hours)
150,000 miles
(8,450 hours, 12 years)
Same as first-generation
Low-temperature
operation warranty
-25℃ -40℃ Same as first-generation
Fuel cell powertrain weight 240 kg 120 kg or less 105 kg or less
Fuel cell stack Composite structure Stainless stamping structure Ferrite
80 g
platinum catalyst/stack
30 g
platinum catalyst/stack
12 g or less
platinum catalyst/stack
Cost $$$$ $$$ $$

(Summarized by MarkLines based on FC-3 GM materials from the FC EXPO 2016 Technical Conference)

 

Daimler AG

 Daimler started developing test vehicles from 1980. The automaker developed the first-generation FCV by modifying the A-Class, and in 2003 it developed a second-generation FCV by modifying the B-Class. Daimler is accelerating development of third- and fourth-generation FCVs with fuel cell powertrains that will be 30% smaller than their predecessors. An FCV, jointly developed by Daimler and Nissan, is being prepared for launch in 2017.


 In Japan, growing momentum can be seen for popularization of the vehicles with the launch of Toyota and Honda's new FCVs being accompanied by moves in the public and private sector to promote them, including support from the Ministry of Economy, Trade and Industry (METI), and planned use at events like the 2020 Tokyo Olympic Games.

 

Toyota

 Toyota announced that one month after the Toyota "Mirai" FCV was launched in December 2014, the automaker received orders for approximately 1,500 units. The company will increase its annual production capacity from 700 units to 3,000 units in 2017. Toyota expects that the annual global sales volume of the Mirai will be 30,000 units or more from 2020 onward (monthly sales volume of 1,000 units or greater in Japan). The automaker will expand its hybrid electric vehicle (HEV) technology to its EVs, plug-in hybrid electric vehicles (PHEVs), and FCVs. It has proposed that electrified vehicles be used in a separate environment in the expected hydrogen society.

 

TOYOTA

TOYOTA

(Created by MarkLines based on FC-2 Toyota materials from the FC EXPO 2016 Technical Conference)


 

Honda

[Principal specificationx of the Clarity Fuel Cell]

Honda Clarity Fuel Cell  Toyota MIRAI (ref.)
Drive system FF FF
Vehicle name/model Honda・ZBA-ZC4 Toyota・ZBA-JPD10-CEDSS
Dimension, weight, and
seating capacity
Length (m) / width (m) / height (m) 4.915/1.875/1.480 4.890/1.815/1.535
Wheelbase (m) 2.750 2.780
Axle track (m) front/rear 1.580/1.585 1.535/1.545
Minimum ground clearance (m) 0.135 0.130
Vehicle weight (kg) 1,890 1,850
Seating capacity (persons) 5 4
Cabin dimensions (m) length/width/height 1.950/1.580/1.160 2.040/1.465/1.185
Electric motor (motor) Model MCF4 4JM
Type Synchronous motor Synchronous motor
Fuel cell stack Type Solid polymer electrolyte Solid polymer electrolyte
Fuel/tank Fuel Compressed hydrogen Compressed hydrogen
Number 2 2
Tank size 141(Front 24/Rear117) 122.4(Front60/Rear62.4)
Nominal working pressure (MPa) 70 70(nearly 700atm.)
Performance Fuel cell
stack
Maximum output (kW [PS]) 103[140] 114[155]
Electric
motor (motor)
Maximum output (kW [PS]/rpm) 130[177]/4501-9028
[Max rpm:13000rpm]
113[154]
Maximum torque (N・m [kgf・m]/rpm) 300[30.6]/0-3500 335[34.2]
Minimum
turning
radius (m)
5.7 5.7
Drive battery Type Lithium-ion battery Nickel-hydrogen battery
Power transmission/
drive gear
Final drive ratio 9.333 8.779
Steering system Rack-and-pinion Rack-and-pinion
Tire (front/rear) 235/45R18 94W 215/55R17
Main brake (front/rear) Ventilated disk/disk Ventilated disk/disk
Suspension (front/rear) MacPherson/
multi-link (wishbone)
Strut-type coil spring/
torsion-beam-type coil spring
Stabilizer (front/rear) Torsion bar



 Honda began leasing the Clarity Fuel Cell in March 2016. The automaker aims to lease around 200 units in 2016. Following the machine-minimum (MM) concept, a downsized fuel cell powertrain (comprised of a fuel cell stack, drive unit, FC boost converter, and electric turbo air compressor) that is the size of a V6 engine has been put in the engine room, making more room for the cabin.

 

Toyota MIRAI Toyota MIRAI


 An aluminum-lined hydrogen tank (a plastic three-layer tank that uses carbon fiber reinforced plastics [CRFP] has been adopted for the Toyota Mirai; see the Note below) with a filling pressure of 70 MPa has been adopted. It is the first in the world to achieve zero hydrogen permeation. 

Toyota MIRAI
Note: Reference-Toyota Mirai tank (from Toyota press release)


 Electricity generated by the fuel cell stack is boosted to 500 V by the FC boost converter and powers the drive motor. Hydrogen from the hydrogen tank and air from the electric turbo air compressor are sent to the fuel cell stack together.

 

Fuel cell powertrain

 Honda's creativity can be seen in innovations like the way air and hydrogen flow all through the fuel cell stack's interior cells, cell minituarization, and densification. The fuel cell stack is made thinner, and it has a unique structure where one unit (two cells) is made by combining two membrane electrode assemblies (MEAs) and three separators. By directing the flow of hydrogen and air in the opposite direction and reducing the width of the flow passage, the amount of water that develops during power production has been reduced, which improves power generation performance during sub-zero temperature start-up.

cell structurecell structure

MEA structureMEA structure



 The amount of expensive MEA material used has been reduced 40% by switching the framework material (excluding the power generating portion) to plastic resin, which reduces costs and improves fuel cell stack productivity. 

 Impressive weight reduction has been realized in areas other than the fuel cell system. Along with making it so the drive motor has higher output and produces less noise, other changes include the first adoption for four-wheelers of an "aluminum hollow die-cast front sub-frame," use of high-strength forged-aluminum tie rods (another first) to lighten the suspension, and replacement of steel materials with aluminum.

 

front subframefront suspention

(Created by MarkLines based on Honda press release)



Hydrogen supply infrastructure

 Hydrogen infrastructure is also being developed in the U.S. (California) and Germany, but this report will only look at the Japanese context. In 2015 progress was made towards a goal of establishing a total of 100 hydrogen stations in four metropolitan areas and along the highways that connect them, but only 82 were built, and completion of the project was delayed by one year to 2016. In March 2016, METI completed a revised version of its "Strategic Road Map for Hydrogen and Fuel Cells." For the first time, FCV growth targets were clearly specified at 40,000 units in 2020, 200,000 units in 2025, and 800,000 units in 2030. Hydrogen station targets were also revised to increase to 160 stations in 2020 and 320 in 2025.


 Honda is expanding the installation of its smart hydrogen stations (SHSs). The automaker has increasingly shifted to building package-type SHSs that are easier to install over on-site generation type hydrogen stations that use solar energy.

 

smart hydrogen station

(Summarized by MarkLines from Honda website)



Why hydrogen now?

 The automotive industry is pursuing electrification as the ultimate answer for vehicular power technology to deal with challenges related to the environment, C02, and energy on a global scale. This intersects with the Japanese government's policy from an energy security perspective of seeking means to end oil dependence. While there are many ways to make hydrogen, a plan create liquefied hydrogen from brown coal overseas and import it to Japan is being considered.

 

The two reasons are:

(1) Compared to gasoline, hydrogen has a "lower outflow of value to overseas."

(2) Custom Japanese technology produces international competitiveness, industry, and employment in Japan.

 

TOYOTA
(Created by MarkLines based on FC-2 Toyota material from FC EXPO 2016 Technical Conference)

Reason (1):

 * Fuel expenses for traveling 10 km in a gasoline HV: around JPY 90

 * Fuel expenses for an FCV traveling the same distance are around JPY 60 (JPY 1,100/kg) 

 In the case of gasoline, the total cost of a gas station (black area), refining the gas in Japan, and moving it to the transport station (white area) amounts to approximately JPY 27 (35%).

 In the case of hydrogen, the cost for hydrogen stations (black area), and producing and transporting the fuel in Japan (white area) amount to approximately JPY 40 (65%). This means the amount of money that returns to Japan from fuel expenses paid by users is larger for hydrogen.

 

Reason (2):

 This is based on the assumption that the Japanese automotive industry is competitive in the development and manufacturing of core FCV components (fuel cell powertrain systems, tanks, electric parts, etc.) and systems.



Brown coal usage

 Brown coal contains a large amount of liquid and low carbon content of 70 to 78%. For this reason, it is usually not mined. However, companies like Chiyoda Corporation, Kawasaki Heavy Industries, and IHI are researching a plan where brown coal would be mined and made into liquefied hydrogen in Australia, and this would subsequently be exported to Japan in specialized ships.

 Chiyoda Corporation started its hydrogen transport business from the end of 2015, and Kawasaki Heavy Industries will start full-scale operation of its supply chain from 2030. The import cost will be approximately JPY 30/Nm3 when these businesses are in operation, and a large amount of cheap hydrogen will be supplied that is CO2 free.



Challenges for FCV popularization

Cost

 The biggest challenge for FCVs is cost. In 2008, Toyota started leasing the FCHV-adv, but the cost of the fuel cell system for the Mirai (launched in 2014) has been reduced to as low as 1/20 in comparison. The Mirai is sold at a price of JPY 7.24 million (including consumption tax). Even with a subsidy of approximately JPY 2 million, the sales price exceeds JPY 5 million. Furthermore, even if 30,000 units per year are sold globally from 2020, this will still fall far below the 300,000 units needed to achieve economies of scale (EOS) in the automotive industry. Because of this automakers are partnering up to launch FCVs.


 Currently GM and Honda; BMW and Toyota; Volkswagen (Ballad) and Shanghai Automotive Industry Corporation (SAIC); and Ford, Nissan, and Daimler are partnering up to lower costs through means such as sharing R&D expenses and component systems, and mass production.


Automakers have plans like those noted below.

* GM will launch a vehicle jointly developed with Honda around 2020

* BMW and Toyota will jointly develop a vehicle

* Nissan will launch a vehicle jointly developed with Daimler in 2017

 

GM
(Created by MarkLines based on FC-3 GM material from FC EXPO 2016 Technical Conference)

 

 The image above is an excerpt from GM's presentation at the FC-3 Technical Conference. Automakers start conducting research on new technologies. New technologies proceed to the design and development phase where they are applied to products. The product goes into production at plants and then are passed on to customers. Until the successful commercialization of the new products, automakers continue to accumulate investments. "Death Valley" is the point where the maximum losses are reached for the amount spent until the successful commercialization of the new product. At this point investment costs start to be recovered, and the company begins to profit when the accumulated losses are reduced to zero. Automakers are formering partnerships in order to rapidly move into the blue zone on the right of the image.

 

Safety

 Hydrogen will need to be properly managed according to the following principals.

1. No leaking
2. Detection if there is a leak
3. No accumulation
4. No inflammation

 

Nissan
(Created by MarkLines based on FC-2 Nissan material from FC EXPO 2016 Technical Conference)

 

Continuous technology development

HONDA
(Created by MarkLines based on FC-2 Honda material from FC EXPO 2016 Technical Conference)



Where to from here?

 According to the new strategic roadmap put together by METI, Japan will enter a second phase of FCV implementation from around 2020, when the Tokyo Olympic Games will be held. The national strategy is to expand cooperation between industry, government, and academia to build a full-scale hydrogen society. The question of whether FCVs are a solution to global environmental and energy challenges will be tested over the next 20 to 30 years.

 

Phase 1: 2009 to 2015   Rapid expansion of hydrogen usage

Phase 2: Mid-2020   Full-scale introduction of hydrogen power generation and establishment of large-scale hydrogen supply system

Phase 3: Around 2040   Full establishment of CO2-free hydrogen supply system


 To make FCVs successful and realize a hydrogen society without environmental or energy issues, "Death Valley" must be overcome through joint efforts by industry, government, and academia under a national strategy; standardization; and the provision of incentives to continue OEM partnerships. This may be the era of searching for silver linings in dark clouds.



(Reference material)

Fuel cell and stack

Nissan

Nissan
(Created by MarkLines based on FC-2 Nissan material from FC EXPO 2016 Technical Conference)

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