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Supply and (Uncertain) Demand for Electric Vehicles

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Manufacturing Engineering Magazine September 2018
Geoff Giordano

The hype around electric vehicles and self-driving cars seems to grow louder by the day. The potential environmental and social benefits are trumpeted generally without reservation.

But not as often discussed, at least in the consumer world, are the potential costs of the manufacturing upheaval likely to accompany mass replacement of internal combustion vehicles with electric should those projections come to pass. The price of re-engineering or even scrapping some or all of the established automotive supply chain and its traditional machining equipment and machined parts is one of the great unknowns in the electric vehicle equation.

Hybrids usually can be manufactured on the same assembly lines as conventional cars, as both share the same platform, battery electric vehicles (BEVs) are often based on new platforms and hence require dedicated assembly lines.

As industry experts have noted, automakers have spent decades refining the process of making internal combustion engines (ICE). Electric vehicles have only been in production in earnest for about 20 years since the 1997 introduction in Japan of Toyota’s hybrid Prius.

Furthermore, if the average eight-cylinder ICE comprises about 1,200 parts while the electric vehicle requires only about 20, where does that leave the suppliers of machining equipment and the makers of precision-crafted parts for gasoline engines? Likewise, EV transmissions are usually far less complex and require less machining than for ICEs.

Large automotive supplier already know it becomes a challenge for them to keep these business units busy in the future and might have about 10,000 people working.

The e-mobility hype is in full progress, and the automotive industry recognizes the chances by now, too. For many affiliated industries, the trend means preparing today for future business models and production. The OEMs and logistics service providers need to adapt the challenges for all parties, and changes not only the picture of our streets, but logistics processes. Inform “offers a complete suite of logistics solutions to the automotive industry that can create visibility of the entire supply chain from inbound logistics and plant logistics through to the distribution of new cars in the dealer network. It’s clearly an uncertain and potentially uncomfortable for future to contemplate.

Short Answer: Not Necessarily

Despite lofty “green” vehicle goals pronounced by auto-makers like General Motors Co., Volvo Cars and Daimler AG, concurrent with moves in Europe, India and China to ban sales of new internal combustion vehicles in coming decades, the electric vehicle manufacturing wave might not be entirely ready for prime time.

Tesla Inc. regarding production snafus in meeting a recent 5,000 – cars in a week goal in July. The base model, with a range of 220 miles (354 km), costs $35,000; customers will pay $44,000 for the 310-mile (499-km) model. In the latest production round this summer, some assembly at the Fremont, CA, plant had to be performed manually after numerous robot errors that required the machines to be turned off.

Tesla further raised motorized vehicles and saw shares tumble in July after the Wall Street Journal reported the automaker had asked some suppliers for refunds. The company responded that it had asked fewer than 10 suppliers for reductions on spending for projects begun in 2016 but not yet complete.

Electric vehicle trend is growing because lots of subsidy support in China and Europe – and maybe because of Tesla. If you look to the traditional car makers, for them (current EV production) is just 1 or 2% of cars. The big question is, will it really go to 10 or 20%? Will we say in five years’ time that EV was nice hype but we just found a new, better diesel and let’s work the next 10 years on the better diesel?

Now is the time for inventors from all corners, not just the automotive industry, to step up to optimize mobility of all varieties. Some parties believe there’s “something new” that can improve the efficiency of diesel and gas-powered cars. It could be something as novel as putting a box of water in a diesel car to make it burn cleaner – closer to 100% than the current 80%.

There are inventions in the market from a physical or chemical point of view that haven’t been tried yet. It’s time that inventors stand up and come up with new ideas besides diesel and benzene and electric vehicles. Electric is not the las step in the development of the automotive industry.

The Automakers’ View

While acknowledging the deep impact EV production is likely to eventually have on traditional manufacturing, some automakers and equipment and tooling suppliers offer a positive outlook in the near term.

For instance, General Motors and Daimler are taking a balanced approach to producing ICEs and EVs. General Motors believes in an all-electric future – a major element of our vision of a world with zero crashes, zero emissions and zero congestion. GM is committed to driving increased usage and acceptance if electric vehicles and believes that Evs are the foundation for self-driving vehicles.

But simultaneously, GM will “continue to provide investment and development of propulsion efficiency improvements, including ICE, as an important part of the pathway to zero emissions. A recent example is the industry-first Dynamic Fuel Management system.

Sales of electric models are expected to constitute 15% to 25% of total Mercedes-Benz sales by 2025, a company spokesperson said. That is depends on the continued development of infrastructure and customer preferences.

In term if manufacturing, they are consistently working on the implementation of their electric initiative. Electric vehicles of the EQ product and technology brand will be integrated into the series production of Mercedes-Benz cars’ existing plants. This is possible because we invested in flexibility and technical equipment with forward-looking Industry 4.0 solutions at an early stage worldwide.

Production of the first EQ vehicle is slated to begin in Bremen next year. With its highly flexible structures, they are able to produce vehicles with different types of drives in their plants, in order to respond flexibly and rapidly to changes in market demand. Therefore, exploiting the opportunities presented by electric mobility while significantly limiting the need for investment.

With Daimler foresees “a coexistence of old and new technologies”, manufacturer will continue to rely on equally on electric and internal combustion engines. For the optimization of combustion engines and their production, they continue to work together with their suppliers.

Tool and Machine Makers’ View

Concurrent with automakers’ plans to balance ICE and EV production in the near term, machine tool and equipment suppliers have expressed confidence of maintaining demand and profitability.

As far as cylindrical grinding is concerned, JTEKT Toyoda Americas Corp have been grinding electric motor shafts for quite some time. They are going from something that would be a specialized piece of equipment like a camshaft or crankshaft grinder to something that would be more suitable for an armature shaft or electric motor shaft, and they pretty well situated as far as having both of those lines of equipment available. They think they would be able to plug in to any electric vehicle supply line however that particular manufacturer chose to do that.

Toyoda’s GL4-I and GL5-I series grinders would be suitable for switching from ICE shafts to EV armatures, which were well suited to take up any increase for demand for electric motor shafts.

For Germany’s Heller Group, there’s about 75% of the machine tool manufacturer’s recent business has come from the automotive industry. The combustion engine is far from dead and they rather believe in the near future, the mobility concept that will comprise a combination of downsized combustion engines and electric drives. Their core competency will enable them to remain a sought-after partner for potential customers in the years to come. At the same time, they will increasingly search for new applications and complementary technologies.

Heller, which with Daimler and BMW AG has pioneered the use of cylinder bore coating for aluminum engine blocks, is exploring new applications through its Development New Business & Technologies group. These technologies will not immediately turn into key revenue contributors, yet are likely to gain significance in the future.

As machining companies worldwide adjust their transportation mix, more capacity is likely to go toward the aircraft and rail industries and heavy-duty vehicles like semi trucks and construction equipment. Agricultural and energy equipment will offer further opportunities. But Western machining companies will face further challenges as Asia generally and China specifically take more market share while the global machine tool industry contracts.

Toolmaker Sandvik Coromant is monitoring the development of EVs closely, studying what components will be present in electrical vehicles and what cutting tools are needed. China is adapting e-mobility at a fast pace, and that Sandvik Coromant works with producers in that market.

Electrical engines have fewer parts, but they still need machining. Also, there will be hybrid vehicles where the number of parts in the combined engine will outnumber the current number of parts.

Like other suppliers to the automotive industry, Sandvik Coromant has worked with vehicle producers for many years, and there is a symbiosis regarding vehicle development, tool development, and how to apply those tools. It is possible that hybrid vehicles will increase, and as mentioned before they have a lot of components.

Even if EV production begins to take a large share of the automotive market, it is likely that heavy vehicles will continue to use combustion engines, as well as a high content of cast iron and steel, materials more difficult to machine than the aluminum is increasing in cars. Depending on price development in composite materials, such materials might increase in the cars, and that offers new challenges for tooling.

Batteries Remain a Hurdle

Some of the most frequently cited cons of electric vehicles are the big, expensive batteries required, their short range and lengthy recharging time and the potential toxicity of some of their chemistries. That’s not to mention the potential environmental impact of excavating the rare metals needed to make them.

If you are in battery business, you probably have the best chances (for future success). But “not everyone is jumping into the battery business; some people say it doesn’t have enough profit, and it’s a big investment”.

But battery production has its issues. With the adaptation of electricity as a power source, increased safety and handling requirements of applied batteries must be cost-efficiently integrated in logistics processes. Battery production includes complex chemical processes and high quality requirements, and even Tesla who operates their own “gigafactory” has already struggled with a battery shortage due to problems with the 100kWh battery production.

Daimler is investing more than 1 billion Euros in  a “global battery production network” of six factories at five locations on three continents. The first factory in Kamenz is in series operation; the other factories are in planning or under construction in Beijing, Bangkok, Tuscaloosa, AL, and Unterturkheim, Germany. The local production of batteries is an important success factor in the electric initiative and this manufacturing network is very well positioned for the mobility of the future.


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