Electric Bus with Quick Battery Charging – Increasingly high prices of fuel, including diesel or diesel, making the company’s interest to create and develop electric bus technology intensified. One is Proterra Inc.. of Golden, Colorado, United States. The company is known hero in designing and building electric propulsion systems, energy storage, control of the vehicle, bus rapid transit and charging for larger vehicles.

One proof of the greatness of the company, last week General Motors Venture LLC dare invest 6 million dollars to help Proterra develop electric bus with fast charging batteries.

Operating Costs

According to, Jeff Granato, President and CEO Proterra, using an electric vehicle, transit bus companies can save costs up to $ 600,000 (USD 517.5 million) for 12 years plus maintenance costs 70000-90000 dollars (USD 60-77 million). It is inferred based on the operational costs for electricity for the battery charge just 10 cents per mile compared to one dollar for every mile diesel.

Nevertheless, assuming that Proterra boss can not be swallowed raw by bus entrepreneur. Because the price of a new electric bus is very expensive. Meanwhile, Proterra itself does not mention the price of its products. But automotive analysts or observers, said the electric car twice the price of petrol cars in its class. Examples are Nissan and Chevy Volt Leaf.


Another drawback of electric vehicles, the limited mileage. To completely charge the battery, such as the Nissan Leaf can only be run sejauh160 km. Well, what if the traffic jam conditions such as in Indonesia, while the passengers need to be cool (meaning the AC must be turned on, as well as entertainment and communication system!)? Even for the bus Proterra, mileage for one full battery charge only 50-60 km.

However, for transit buses, electric vehicles is considered more practical. The reason, the route can be estimated, for example, could have been any stops are equipped with battery charging. Proterra using chemical batteries, lithium-titanate type. Superiority, can be charged in 10 minutes every few hours throughout the day with a lifespan of 8 years or more.

The battery is a major problem in electric cars. According to Granato, lithium-ion batteries, have a weakness, if often filled quickly, a short shelf life. Hence, the company is developing an automatic charging system.

As the bus approached the pegisian, the system automatically connects (wirelessly), the arm was on the bus charging. Furthermore, the bus will stop when the charger is attached. In this way, charging can be done when passengers up and down.

If the route there is no room charge, can be put into power to the existing outlet in a few minutes. Further, the key innovation on this bus, which is made of a composite body so that it can reduce hundreds of kilos of weight, including batteries.

Fast Charging

Fast charging systems such as Proterra, according to Technology Review, published by the Massachusetts Institute of Technology, have also been developed by Sinautec Automobile Technologies, in Arlington, Virginia with partners from China, Shanghai Aowei Technology Development Company.

For this, the bus uses ultrakapasitor that can be charged faster than lithium-titanate battery. Yet only for a distance of several kilometers. As a result, the bus must be equipped with more depots along the route.

Meanwhile, the system created by Proterra allowing enough to completely fill the bus on each route. With this, it will reduce the amount of filler that price is still expensive (estimated $ 50,000 per unit). BYD reported from China, has made a rapid charging system for the bus, which is 30 minutes with a capacity of 50 percent!

Electric Cars with Li-Ion Capacitor – During these hybrid electric cars and plug-ins that were introduced generally use lithium-ion (li-ion). Now, two companies from Japan, FDK Corp. and Takayanagi Co. Ltd., work together to introduce an electric car with a power source capacitor.

A prototype electric car that relies on the capacitor is currently being exhibited at the Next Automotive Industry Fair 2011 that took place on June 15 to 17 in Tokyo.
Added, the mileage of electric vehicle that uses a capacitor is only 5 km. Nevertheless, the charging time is only 1 minute and is expected to be released in 2012.
“With such capabilities, we hope this car is only used for shopping at stores around the housing complex. In the store anyway, the capacitor can be recharged. After that, the owner went home,” said Takayanagi.
Electric car li-ion capacitor is a capacitor module uses 8 li-ion 36Wh capacity (a total of 290 Wh). Two capacitor module mounted on the front, while six more in the back. Voltage of 45 volts per module, which is obtained by connecting four capacitors in series and then paralleled. Total voltage to 90 volts.
By using a capacitor, the weight is much lighter car, only 260 kg. That also includes 40 batteries. Furthermore, to drive both rear wheels, used two electric motors made ​​in DC Advance Inc. that delivers 1.75 kW of power and can be accelerated to 80 km / hour.

At first glance, this tiny box minibus figure is less attractive. However, look closer. Open the door, come in, and saw the interior. Admiration will appear. “We designed this mikrobus by emphasizing its functional side,” said Dr. Roman Dudenhausen, Managing Director Mia Electric, when introducing this product in Geneva.

Minibus (in Europe called mikrobus) describes how some people think Europe today to overcome the problem of personal transportation and courier in the city’s increasingly dense traffic. In order for the vehicle can move with the nimble, efficient energy, and does not cause pollution, ts size is made possible. Nevertheless, the convenience of drivers and passengers still take precedence.

Three variants Mia (made jointly by two companies from Germany and France), its longest size of 3.18 meters and 2.87 meters short. The width and height of all minibuses Mia is the same, namely 1.64 and 1.55 meters. The weight is 750 kg, inclusive of li-ion polymer battery. The maximum charge that could carry 400 kg or the maximum permitted weight of 1195 kg.

Sliding doors

You can only say the sliding door was used for the minibus in Indonesia. However, all Mia side door opened and closed by sliding. This is the creative description of the car design. Also, once entered into the passenger compartment and cockpit, also found new things in the minibus. So, in a cramped space, the electric car is not going to bother the passengers nor the driver to go up and down. So also when up and drop off luggage!

The driver was in the middle so that the space next to (right and left) wide. All passengers are behind. Short Mia filled only two passengers with two individual seats. Although such a concept, similar to the interior minibus Mia supersport car, the McLaren F1.

For Mia length, rear seat can carry three passengers, if the seats are together.

According to Mia, the driver’s position in the center aims to obtain driver’s panoramic view while sitting on the seat. In addition, convenience still okay because the ergonomic seat design. Especially for the van carrying the goods, the cabin can supply 1,500 liters of space.

Tablet PCs

As the car that gave priority to the function, the center of the dashboard to monitor the car. Other additional devices are tablet PCs for business. The interior is made from scratch-resistant ABS material and can not bend.

As a source of energy, Mia use 8 kWh battery which when fully charged (3 hours) can be for a distance of 80-90 km. When completed another 10 minutes, power it can to increase the mileage as far as 8 km. The highest speed can be achieved, according to claim Mia, is 110 km.

Even so, the price of this vehicle, including expensive. Mia L (long chassis) sold for 19,500 euros with a contract until 2011, including the battery. Mia The short version with a special seat much more expensive, 24 500 euros!

For that, the target market is Mia fleet (fleet users). As for those using Mia as a new personal transport can be obtained in the next year. Currently the car is already on sale in France and Germany with the promise of sending the unit on 1 June.