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Continental Selects Maxwell Ultracaps for Voltage Stabilization System to Support Stop-Start

Continental AG, has selected Maxwell Technologies’ BOOSTCAP ultracapacitors as the energy storage element of a voltage stabilization system (VSS) it has developed for automobiles. The VSS stabilizes the auto’s electrical system and supports stop-start functionality for improved fuel efficiency and reduced emissions.

Continental has advised the company to prepare for delivery of initial series production volumes of BOOSTCAP cells for new car models starting in 2010, according to David Schramm, Maxwell’s president and chief executive officer.

Stop-start systems reduce fuel consumption and emissions by shutting off the car’s internal combustion engine as the vehicle slows and seamlessly restarting the engine when the driver engages the clutch or touches the accelerator. In the VSS system, the ultracapacitor module provides burst power to re-start the engine, relieving the car’s battery of high currents and repeated cycling that can shorten battery life. It also provides a reservoir of power to ensure stable functioning of the vehicle’s electrical system when multiple power demands tax the system.

Schramm said that Maxwell is also working with other Tier 1 suppliers, automakers and heavy vehicle OEMs on ultracapacitor-based solutions for other electrical system applications and various hybrid and electric drive systems.


Henry Gibson

A small separate EFFPOWER bipolar battery restarter system would be easier to implement. The CSIRO hybrid battery would also be interesting to implement. A flywheel needs about the identical power conversion system as capacitors but no electrical cell protection. The fuel injection spark ignition system of starting might be a lot cheaper. The engine should be full of clean air after a revolution with no fuel injection. ..HG..


This is basically a CSIRO hybrid lead acid battery arrangement. Nothing really new here. CSIRO packaged both components in the same case for replacement and installation ease. Just drop one into your stop-start vehicle and stop worrying.

Of course, for those who do not want to pay Royalties for CSIRO......


While it seems hard to improve on the mazda smartstart,
Electric based systems can install a capacitor with a the usual handfull of components that also enable component and weight downsizing. They could be fully charged on engine shutdown. If no starter current required, every other system does. Before we get out the driveway we could use any available capacitive storage.
So one could use a capacitor to "get underway" ready for a brake application to recharge at low loss.

Mechanical devices including flywheels or hydraulics are well suited to integration into systems that may not support high power elecrical devices.

While there is no obstacle to X hybrid sytems, They would need to be made on multiple production lines.
Instead of some extra code and design done in house, X type hybrid require technicians from multiple disciplines for maintainance.
At present we have Auto Electricians doing much of the work on our vehicles electrical and aircon systems with mechanicals seviced in a different "shop". Chassis specialists and panel shops.

The trade skills involved at a high standard require . understanding of the essentials, more detailed knowledge of service procedures and then the most productive of faults and fixes. I fear the cost of involving multiple disciplines in the everyday running of these heath robinson add ons will be prohibitively expensive.

Vehicles for repair or maintainace will find themselves on the back of a tilt-tray headed for supermarket sized workshops.
In low density populaton areas some distance from the class of workshop required, we would find for instance a vehicle with mystery issue requiring diagnosis or specialised setup. These vehicles cant be driven and resetting requires knowledge and equipment. Is the owner to undertake the journey including travelling time, unexpected delay and return trip.
The skilled techician will never be proficient all the new systems they may be asked to repair.

I remember a comment from trainer re getting in over your head. The point being that succesfull maintainance is only acheiveable if designed to be so.
This must take into account the ease of serviving.

"If Jumbo's were built to be serviced by '***keys,And they certainlty could, We (the class) would be in 'real trouble'" ie out of a job.


This sounds like an expensive way to stabilize the system.

Just use a slightly larger battery and replace it in 32 months instead of 36.

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