Rolls-Royce 102EX Electric Concept, 2011

 

Rolls-Royce 102EX Electric Concept, 2011

Rolls-Royce Motor Cars proudly presents Rolls-Royce 102EX, a car that represents one of the most significant initiatives taken by the company in recent years. It is the world's first battery electric vehicle for the ultra-luxury segment and continues a tradition of experimental cars running through the model generations.

Rolls-Royce produces cars that represent the pinnacle in luxurious motoring for the world's most discerning customers. However, the company also recognises the need to look to the future and to plan for long-term sustainable growth. An investigation into alternative drive-train options is an important step in that process.

With Rolls-Royce 102EX, also to be known as the Phantom Experimental Electric (EE), it is the company's intention to carefully test the opinions and reactions to alternative drive-train options of a range of stakeholders including owners, enthusiasts, members of the public and the media.

Throughout 2011 Phantom EE serve as a working test bed, giving owners, VIPs, the media and enthusiasts the opportunity to experience an established alternative drive-train technology and to feed back their experiences, thoughts and concerns directly.
The bank of research gathered from a global drive programme that will include Europe, the Middle East, Asia and North America will be crucial to decisions affecting alternative drive-trains for Rolls-Royce Motor Cars.

Phantom EE also poses more fundamental questions: Is an all-electric drive-train able to deliver an authentic Rolls-Royce experience for customers, an experience that truly befits the marque?
Whether all-electric or another alternative drive-train option is right for Rolls-Royce will become clearer when the test programme is complete at the end of the year.

Rolls-Royce 102EX - PHANTOM EXPERIMENTAL ELECTRIC (EE)
Reinvention is part of being timeless and Phantom EE is the latest in a line of experimental vehicles from Rolls-Royce Motor Cars. It builds on a legacy which dates back to 1919 and 1EX.

Experimental models are used to test and evaluate new technologies and applications which could shape future Rolls-Royce products. Unlike a concept car, Rolls-Royce experimental models are always fully functioning, drivable vehicles using tangible materials such as wood, leather and metals rather than clay and foam or other concepts.
They present engineers and designers with the opportunity for real-world innovation and are used not only to showcase new components and engineering techniques but also to evaluate them.

The latest in this line of experimental projects began with a Rolls-Royce Phantom, a strikingly modern and immaculately proportioned car in which high technology and hand-craftsmanship combine to produce something extraordinary.
Phantom EE features the car's ground-breaking aluminium spaceframe, so important to dynamic prowess, as well as the sense of calm and tranquillity enjoyed by occupants. However, the naturally aspirated 6.75-litre V12 petrol engine and 6-speed gearbox have been replaced by a lithium ion battery pack and two electric motors mounted on the rear sub-frame. These motors are connected to a single speed transmission with integrated differential.

DESIGN
102EX bears the famous hallmarks of the Rolls-Royce Phantom on which it is based, such as hand craftsmanship, fine detailing and iconic design cues like the pantheon grille and the Spirit of Ecstasy which celebrates its centenary in 2011. However, at the core of its design is the essence of an experimental vehicle, establishing this car's status as a test bed, while subtly alluding to its electric power plant.

ATLANTIC CHROME EXTERIOR
Our designers were challenged with creating a finish for Phantom EE which immediately signified a special car, distinguishing it from standard Phantom models in the absence of many overt design changes. Not an easy task, since all Phantom models are special - with customers benefitting from a range of bespoke paint options running to some 45,000 colours.

ILLUMINATED SPIRIT OF ECSTASY
As well as the launch of Rolls-Royce 102EX, 2011 marks another milestone in the history of Rolls-Royce Motor Cars. On 6 February 1911, the design for Charles Sykes' Spirit of Ecstasy was first registered, signalling the start of a 100 year period in which this famous icon has adorned the prow of Rolls-Royce cars, from the famous Silver Ghosts, Clouds and Shadows of the 20th Century to today's hand-built Phantom and Ghost models.

INTERIOR DETAILING
Atlantic chrome-finished dashboard dials echo the exterior colour, providing a sense of interior-exterior balance and their analogue displays maintain the timeless architecture that every Phantom interior commands.
Other changes hint at further evolutionary designs applied to the car. For example, some dials have been subtly modified to provide information needed by the driver of an electric vehicle. The fuel gauge in particular has been replaced by an elegant battery charge indicator.

EXTERIOR RE-CHARGING POINT
Re-charging is undertaken with a plug and five-pin socket which takes the place of the normal fuel filling mechanism for Phantom.The standard fuel filler cap has been replaced by a design featuring a clear window, displaying the RR logo and 102EX motif. The window frames rear-mounted, tricolour LEDs which present the car's charging status.
On start up, the socket is bathed in blue light. This begins to flash as charging commences. When completely charged, the display turns green, then flashing green as the solenoid is disengaged. A potential fault in the system is indicated by either constant or flashing red light.

CENTRE CONSOLE DETAIL
A key identifier for Phantom EE is the design of the centre console charging and display, sited below the central arm rest. A simple switch is used to start and halt charging, while the display itself features a bright plate with an image of a battery, lit by LEDs.
Reflecting the lights applied to the exterior charging point, this image changes colour according to the charge status of the car. A blue-lit battery shows the vehicle is on standard charge, while pulsating blue indicates that inductive charging is taking place. Green indicates a fully charged battery while red notifies engineers of a potential fault in the system.

CORINOVA LEATHER
"At Rolls-Royce we pride ourselves in producing an authentic and natural product for customers, the quality of which is second to none. Seton Corinova is an experimental vegetable-tanned leather that allows us to celebrate more of the curves, creases and other features that are part and parcel of the life of the animal. It's a more sympathetic process that stretches our understanding of Rolls-Royce interior expectations. Owners' reactions will prove fascinating during the tour." - Andrew Monachan, Rolls-Royce Motor Cars General Manager, Leathershop.

Interior wood veneers present Phantom owners with unique grains, patterns and detail adding weight to the fact that every model leaving Goodwood is as unique as the finger print of its owner. Phantom EE takes this concept a step further.
Its leather interior is derived from a natural vegetable tanning process christened Corinova. This gives life to the car, adding definition to the seats, floor and arm rests.

Most leather produced for automotive applications is chrome tanned. This is an important constituent that helps to stabilise animal hides and transfer collagen into leather fibres. The barrel-dyeing process used to colour Phantom interior leathers gives a rich, uniform pigmentation while maintaining the natural feel and softness.

An experimental leather, Corinova distinguishes itself by being entirely chrome free. It starts with a preparation of Glutardialehyde to prepare for tanning. Chestnut extract, sustainably sourced from Southern Europe and Tara powder from crushed fruit of the Tara bush in South America are used for drum-spun colouring. Fruits are harvested without damage to the plant and the product is finished with a combination of natural binders and high tech polymers.

Rolls-Royce fully expects perceptions to be challenged and first impressions will no doubt focus on appearance, as features that define the life of the animal are more clearly visible in areas like seats and armrests than in production Phantom interiors. A change from the sumptuous finish applied to Phantom leather may imply a compromise to some owners, but others may welcome distinguishing features that stretch individualisation for Rolls-Royce Phantom models ever further.
As well as gauging owner feedback, the leather will be tested for its durability and performance after several months on tour.

INTERIOR PANELS
The interior of Phantom EE represents a departure from the traditional wood sets that define the majority of cars delivered to customers, providing a unique finish to the car. It features a distinctive aluminised foil weave that lifts the environment of the interior, contrasting sharply with the darker natural leather within. As is the case with Corinova leather, the aim is to challenge traditional perceptions of what might constitute a Rolls-Royce interior design scheme.

BATTERY PACK
Phantom EE is thought to have the largest passenger car battery in the world. Peak current is 850A, delivered at 338V DC. Overall capacity is 71kWh.
The pack is comprised of large-format NCM pouch cells. NCM (Lithium-Nickel-Cobalt-Manganese-Oxide) is a variant of lithium-ion chemistry that has particularly high energy and power densities.

The Phantom EE battery pack houses five modules of cells, a 38-cell module, a 36-cell module, and three smaller ones of ten, eight and four arranged in various orientations within an irregular shaped unit. This resembles the overall shape of the original engine and gearbox.
Each of the 96 cells was individually tested before assembly into modules to determine their characteristics and capacity. Sub-assemblies were further tested under load to verify that the power connections between each cell perform to specification.

The electronic sensing units for each group of cells were tested and calibrated prior to assembly and put through a rigorous temperature cycling regime designed to provoke failure of weak components. The main electronic box, which contains the switching and control gear, was tested in isolation from the other components to verify correct operation.