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After the Great East Japan Earthquake struck, the wrecked cities faced gasoline shortage. It became difficult to ensure means of transportation, and the need for EVs increased.We implemented assistant activities through EVs to be used as transportation at the affected areas.
Support activities by EVs and quick chargers at the wrecked cities of northeastern Japan
pummeled by the earthquake and tsunami
Takaoka Electric Mfg. Co, LtdTokyo Electric Power Company
Fujikura Ltd.Mitsubishi Motors Corporation
Shortage of EVs
1.Issues and the contents for discussion
・Gasoline shortage at the disaster areas hit by the Great East Earthquake caused the difficulty in securing transportation means.
・Need for additional EV deployment increased in the wrecked cities. ・Since relatively small number of quick charging stations were installed in Tohoku area,
additional installations were needed to improve the operating rate of EVs and the environment for safe driving.
・In Ibaragi prefecture, the installed quick chargers were not available for general public, early release of the chargers were expected.
Shortage of quick chargers
Release ofelectric power company’s quick chargers
Installing additional QCs in proper points for EVs’ activity
Delivery and deployment of EVs
2.Cooperative structure
・The following four companies worked together in the field of their specialties.
Main roles
Cooperation with the disaster countermeasures officeLending of EVsSecuring of supports for installing quick chargers
Mitsubishi Motors Corporation
Considering ways to install QCsProvision of construction material Installation of quick chargers
Fujikura Ltd.
Plan for electric power supply Release of its own quick chargersCoordination of related parties
Tokyo Electric Power Company
Lending and delivery of quick chargersInstallation condition study
Takaoka Electric Mfg. Co., Ltd
Vehicle
Charging infrastructure
Electric power supply
3.Support details
・Lent 89 EVs and 3 quick chargers・Released 2 quick chargers for disaster relief activities use only
Total 89
Other 3
Fukushima pref. east branch government office building
Miyagi Mitsubishi Motor sales, Ishinomaki
TEPCO Mito affiliate office building
The electric company’s quick chargers were not available for general public, but it became available for disaster relief activities use only.
TEPCO Ibaragi branch office buildingRelease of existing quick chargers
Iwate pref. Ohunato government office building
Quick charger lease
Not only Mitsubishi Motors, but also Saitama-city, Soja-city, Nagoya-city, Mitsubishi Corporation and Mitsubishi car dealers lent EVs without any charge, and more than 100 i-MiEVsare still actively used in the disaster areas now.
Fukushima prefecture 31Miyagi prefecture 33Iwate prefecture 18
EV lease
RemarksPlace & the number of lent EVsContent
4.Delivered EV ①
※1
*1 CO2 emitted from electric generation to charge is not included.
【Economy】
100% ElectricEconomically efficient
【Ecology】CO2 emission on driving
ZERO
【Comfortable】Quiet and smooth
Comfortable driving
【Charge】At home, and outside the home
Two charging methods
※写真は11型車両です
・EV batteries can be used as a source of electricity for home electric appliances in an emergency.
“AC power supply” enables EVs to supply power to low- power-consumption electrics (100W or less).As to power supply to high-power consumption electrics (1500W class), it is not available at this point, but it’s under development toward the practical use.
High-power-consumption electrics(1500W class)
<under development>
Low-power consumption electrics(100W or less)<available>
Cell phoneLaptop computer
Fan
Oil fan heater
Electric pot
Vacuum cleaner
Rice cooker
Washing machine
Hair dryer
LCDElectric shaver
AC power supply
5. Delivered EV ②
6. Delivered EV ③
An example that the EV is supplying power to home appliances using “AC power supply”.(Taken at Mitsubishi motors showroom)
AC power supply(Inverter)
Connected to cigarette lighter port
Do not exceed the capacity of the power transformer.
Use optimum wiring route and wiring technique appropriate for the location condition.
Do appropriate foundation work for the conditions of locations
Economical
7.Quick charger installation・Selected installation locations in consideration of the needs, power supply conditions
and electricity distribution facility・Prepared quick chargers having suitable output for the conditions of the distribution
facilityArranged installation conditions and optimum wiring route between charger providers and construction side
Conditions for installation
Proper points for EVs’ activity Existing facilities have the capacity to receive additional electricity.
Conditions for selecting locations
Since quick reconstruction of power grid was required, making new electricity distribution lines was difficult.
(Preparing quick chargers having appropriate output for the electricity distribution facility and contract maximum demand)
(Use of FEP tube, etc.)
(precast concrete、channel、chemical anchor bolt, etc)
6.Delivered and Installed Quick Charger
・Easy to install at temporary site, since power cable from three directions possible.・Maximum output power can be adjusted according to available power at the site.・Robust, since it can continue operation even if one of five modules goes wrong.
4Module Op. Possible
Bad Module Exchanged
10~50kW Flexibly Adjustable
Can
take
pow
er fr
om
two
side
s an
d ba
ck
50kW (Normal)
30kW (Ex.1)
20kW (Ex.2)
Charg
ing P
ow
er
Charging Time Charging Time Charging Time
Rest
ricte
d
Rest
ricte
d
9.Quick charger installation work
・Fujikura manufactures and sales the connector with cable which connects quick chargers and EVs.
・Therefore, for Fujikura, quick charger installation is the field that we never experienced. But we challenged it by making extensive use of construction skills we have acquired.
Outline of Installation workCubicle
Features of Fujikura connectorConnector’s simple operation
Designed based on ergonomics
The connector and the vehicle inlet are tightly
locked.
Low insertion force, easy to use for everyone
Leakage circuit breaker
Quick Charger
FoundationFEP tube
On-site research↓
Foundation work of quick charger
↓Installation of FEP tube
(including fixing) ↓
Installation of quick charger
↓Connection of
leakage circuit breaker↓
Wiring of cable↓
Connection of cable
Cable
10.Quick charger installation work
Foundation work Implanting anchor
Installation of quick charger
Installation of FEP tube
Leakage circuit breaker Charging
FEP tube
quick charger
quick charger connector
11.Quick charger installation
Iwate pref. Ohunato government office Miyagi Mitsubishi Motor Sales,Ishinomaki
Fukushima pref. east branch government officeTEPCO Mito affiliate office
TEPCO Ibaragi branch office
12.EVs in the wrecked city
・ Right after the earthquake, shortage of gasoline was acute. But the electricity supply was restored relatively quickly, and EVs have been used as means of transportation for the reconstruction.
・Electric power supply will be tight due to the effects of the earthquake. But the EVs are charged during the night, which doesn’t place a burden on supply side.
MASASHI KAWATA
Sendai City Council of Social Welfare- Sendai city volunteer center
13.Voices of users
・Miyagi Public Health and Welfare Office; Director(Male)I realized that electricity supply is restored more quickly than other infrastructures. Also I realized that EVs are helpful for initial response to disaster-relief activities.
・Sendai city Miyagino Health and Welfare Center; Assistant manager(Female)All female workers could drive EVs in the same way as gas vehicles. We didn’t see any difference between the EV and a gas vehicle except EV’s quietness. Since the EV ran quietly, we could have the meeting in the car. First, we nervously drove the EV, but later we found that it doesn’t go out of electricity easily. Now we put priority on EVs rather than gas vehicles to drive.
・Sendai City board of education; Manager( Male )EVs were really helpful when we needed to go to the affected schools for investigation and to see constructors for meetings. Because emergency vehicles had a priority to get gas over official vehicles, EVs helped us a lot.
・Major carrying company; Director ( Male )The EV was helpful after the electricity supply was restored. We used the EV for volunteering and delivering goods. When gasoline was in short supply, we used our all EVs through the day. I would say that all the vehicle of such size can be changed to electric.