Lithium: Volvo To Start Serial Production Of Hybrid Buses TNR.v, CZX.v, RM.v, LMR.v, WLC.v, LI.v, CLQ.v, HAO.v, ABN.v, AVL.to, RES.v, QUC.v, AONE, HEV

Now we have another mass market for lithium batteries in development: mass transit has a massive support from Federal and Local governments in Europe and Volvo is a very serious player here.

Electric Cars is the only commercially viable technology today to sustain mobility world wide with rising Oil prices. Lithium is at the heart of Green Mobility revolution - it is an industry adopted standard for batteries and billions of dollars are invested into battery technology and upcoming by the end of this year Electric Cars on a mass market scale. This Bull market is still very young - only a year or so from the beginning after the crash of 2008.We will provide you with few links to study the subject further:"

Highlights of the Volvo 7700 Hybrid

A fuel-saver for the environment

The Volvo 7700 Hybrid is a parallel hybrid, which means that a diesel engine and an electric motor work together or independently to power the bus. In urban traffic fuel savings are up to 35 percent and in suburban traffic approximately 20 percent.Highly efficient electric motor. The electric motor is used to start the bus and to accelerate it up to about 20 km/h, giving you considerable fuel savings and near-silent take-offs. With full torque from the start the acceleration is excellent, offering quick starts from standstills.

Stand stills without exhaust gases.

At higher speeds, the diesel engine takes over, while also recharging the batteries. Since the electric motor serves both as a motor and a generator you actually recharge when driving and braking. During idling at a red light or bus stop the diesel engine is shut off, resulting in zero emissions.

Reduced emissions

The Volvo 7700 Hybrid bus proves that low emission levels and high capacity can be combined. The Volvo system reduces emissions of CO2 dramatically, but also NOx and particulate emissions by as much as 40–50 percent. With an optional filter particulate matter can be reduced by an additional 80 percent.

Get the most out of your Volvo 7700 Hybrid

Buying a Volvo bus opens the door to a complete offer of services and products for increased productivity; from service contracts, fuel management systems and certified Volvo 7700 Hybrid mechanic on site, to driver training. There is also a wide variety of other services such as refurbishment of an older vehicle, parts online and 24/7 help with Volvo Action Service. Some of the services are offered with a fixed price per kilometre, depending on local market conditions and driving distance, while other services are one-time costs."

This is how it works

Lithium ion batteries

The Volvo 7700 Hybrid has active temperature controlled lithium ion battery cells, with individual cell charge control. This results in reliable and efficient energy storage. Volvo Buses’ lithium ion battery is known for its high energy storage capacity, low weight and low environmental impact. It is optimised so that the hybrid can run everywhere, regardless of climate. There is no scarcity of lithium and it can be exploited with low environmental impact.

Electric motor/generatorI-SAM (Integrated Starter Alternator Motor) is a permanent magnet motor running on alternating current. It also functions as a generator. Energy converter DC/DCThe energy converter provides conversion from 600V/24V 7.5 kW.

Transmission

The close ratio Volvo I-Shift automatic gear-changing transmission has software that interacts with the hybrid system and is optimised for city and commuter traffic.Powertrain Management Unit (PMU)The brain of the system is an electronic control module that regulates engagement and disengagement of electric and diesel power, as well as gear-changing modes and battery recharging.

Diesel engine

Fuel efficient 4-cylinder, 5-litre Volvo D5E diesel engine, producing 210 hp. Installed vertically in the left rear corner, just as in the rest of the Volvo 7700 range.

Volvo To Start Serial Production Of Hybrid Buses
Published:31-May-2010
By Staff Reporter
Volvo Buses said that it will now start serial production of its hybrid bus Volvo 7700 Hybrid and double-decker Volvo B5L Hybrid. These hybrid buses are expected to reduce fuel consumption by up to 35% and carbon emissions by an equal amount.
According to Volvo, the 12-meter Volvo 7700 Hybrid bus is now being built in its plant in Wroclaw, Poland and chassis for double-decker Volvo B5L Hybrid will be built in Boras, Sweden. The coaches for double-deckers will be built by Wrightbus in Northern Ireland.
Volvo’s hybrid buses feature a small diesel engine and an electric engine that can operate it independently or jointly. When the brakes are applied the brake energy is utilized and stored in a battery, which then drives the electric engine when bus accelerates again.
In addition, the engine switches off automatically at bus stops and then restarts only with the help of electric engine. The diesel engine does not start until the bus reaches 15-20 km/hour.
Hakan Karlsson, president of Volvo Buses, said: “This is a major step for the Volvo Group and for the bus industry. There is now a hybrid bus in the market, which will significantly reduce fuel consumption, strongly reduce emissions and is also commercially viable.”