One Thing They Don’t Tell You About EVs When The Rubber Meets The Road

The thing that a few of the proponents of EVs don’t often tell you about is about the tyres.  They’ll tell you about how EVs produce less in the tailpipe emissions department and about how quiet they are and how much better the range is these days, but if you’re new to the world of electric vehicles, you may be in for a surprise the first time you have to change the tyres.

What they don’t tell you is that EVs need special tyres and fitting the sort of tyre that worked perfectly well for an ICE vehicle of the same size or even the same weight won’t work on an EV. The tyres on an EV have to cope with a number of the characteristics of electrical motors. Specifically, the tyres have to cope with the increased torque, the weight of the battery pack, the need for better energy efficiency and the need to reduce road noise.

Because electric motors behave differently from internal combustion engines, they have much higher torque figures. Torque, as we should remember from our high school physics class, is rotational force (as opposed to linear acceleration), so it bites in where the rubber hits the road – literally.  The more torque, the more force is applied.  Now, I like a good bit of torque in a motor, but tyres don’t like it as much, and too much can wear them out more quickly. This means that an EV has to have tougher tyres. They also have to have more grip to avoid slipping when accelerating, especially in wet or slippery conditions.

On top of that, the tyre has to handle the increased weight. You might not realise this, given that most EVs tend to be smaller urban vehicles (although this is changing).  However, EVs weight more because of the battery pack. In fact, the battery pack can make up to quarter of the weight of an EV – and yes, this outweighs the bits that aren’t in an EV, such as the radiator, the fuel tank, the exhaust system and so forth. The battery pack also needs to be protected against mechanical damage (such damage is very bad news for the battery and is the leading cause of electrical car fires). This extra weight applies to hybrids as well as to purely electric vehicles (battery electric vehicles or BEVs). This means that the sidewalls on the tyres for EVs need to be stronger and heavier to carry the weight.

These two factors alone would be enough to indicate that putting regular tyres on an EV or hybrid vehicle is a bad idea, as the tyres would wear out more quickly – a lot more quickly! In fact, some have argued that if you are concerned about the environment, you should bear in mind that although EVs produce less from the tailpipe, they create more particulate matter from tyre wear. This is why several of the big-name tyre manufacturers have created special tyres for EVs.

If you’ve ever looked at the tyres made specifically for EVs, you may notice that they are taller and thinner. This is to decrease the rolling resistance.  Going back to high school physics once more, something that’s heavier has more inertia and thus requires more force to get moving (think about how easy it is to kick a soccer ball rather than a medicine ball).  Naturally, a tyre that’s stronger and more resistant to wear will be heavier, which would mean more inertia and thus rolling resistance. Making the tyre narrower will reduce the drag and thus the rolling resistance. This is important, because if you have waited half an hour to charge up your EV from a public charging station, you want that charge to last as long as possible before you have to do it again, so reducing the drag and the rolling resistance will be more energy efficient.

Lastly, there’s the noise issue. In an ICE vehicle, the rumble of the engine drowns out the road noise.  In an EV, there is no rumble, so road noise is the only thing you can hear.  Road noise isn’t quite as soothing as engine noise (most of the time), and that’s the only thing that you can hear in an EV, especially if you’ve switched off the sound system to save power and extend the battery range.

You can put tyres designed for other cars on EVs and hybrids, but three things need to be borne in mind.  Firstly, you have to be sure to get something that can handle the extra weight.  Secondly, a regular tyre will reduce the range of the battery.  Thirdly, the tyre will wear out a lot more quickly, meaning that you won’t actually save anything by putting regular bog-standard tyres on an EV. 

It’s best to put the proper tyres on an EV, as you will get better range and longer tyre life out of them.  Admittedly, these tyres are more expensive (like performance tyres on a splashy sports car).  They will also wear out more quickly, but not quite as quickly.  This is something that tyre manufacturers such as Michelin are working on but you will have to factor in if when deciding if an EV is right for you and your budget.  Despite being built tougher, these tyres still need to be maintained correctly – checking the pressure and rotating them regularly.

As with all things, the issue of battery weight and tyre wear are things that researchers are looking into and trying to improve, so we can look for things to get better (and hopefully cheaper) as time passes.

Extending The Life Of EV Batteries

One of the big questions that a lot of people have about making the shift from ICE (internal combustion engine) vehicles to EVs of any sort is the issue of battery life.  In this context, battery life doesn’t refer to how many kilometres the batteries will take you (this is technically known as battery range) but the actual lifespan of the battery unit itself.  If you’ve had any experience with any kind of rechargeable battery – which most of us have had – then you’ll know that even though you can recharge a battery a certain number of times, you can’t do it forever and eventually the battery will die, never to be recharged again.

Having said that, the lifespan of EV batteries is pretty good. In fact, the manufacturers claim that batteries can last for about 10–12 years, which is longer than the average lifespan of a whole car in some countries (although those who like second-hand cars or who are into classic cars may raise an eyebrow at this statistic). They’ve also got warranties to ensure that they last for a certain amount of time.

However, people researching rechargeable batteries don’t tend to measure the lifespan of batteries in terms of time (partly because no scientist in a rapidly developing field wants to spend 10 years running an experiment). Instead, they measure the lifespan of a rechargeable battery in charge–discharge cycles. To understand why they do this, we need to understand a bit about the science of a rechargeable battery.  Don’t panic – I won’t get into too much detail, partly because I don’t have a PhD in it and can’t wrap my head fully around some of the minute details.

In any battery, an electrical current is generated when ions (particle with an electrical charge) move from the negatively charged anode through an electrolyte to the positively charged cathode. This keeps going until everything balances out and the electrochemical reaction stops.  You can do this yourself with a copper coin (if you can find one these days), a zinc-coated nail and a lemon. Attach a wire to the coin and the nail, maybe connecting fairy lights in the middle, stick them in a lemon and watch the lights glow. However, in a rechargeable battery, this processed can be reversed, shuttling those ions back to the anode again.

In a rechargeable battery, every time the reaction comes to an end, i.e., complete discharge, that’s considered to be a full cycle.  In the lab, to test a battery’s lifespan, researchers charge and drain and charge and drain and… until the material in the anode and/or cathode starts to deteriorate, which all things do over time.  They also measure capacity decay. Over time, any rechargeable battery will lose the amount of charge it can store. Again, this is related to the number of charge–discharge cycles.

So what does that mean for EV batteries?  Although the manufacturers measure lifespan in years, this figure is based the ideal battery user.  If you charge your battery the right way and use it in the right way, then you’ll get the maximum lifespan from your EV’s battery pack. However, if you don’t, you’ll shorten the lifespan of the battery.

You can imagine the number of charge–discharge cycles in a battery as kind of like lives in a computer game.  You’ve got a lot of them, but every time, you get those hit points down to zero and have to “respawn”, you’ve used up another life.  However, unlike a computer game character’s life, hitting either extreme (full charge as well as full discharge) will shorten the lifespan because it puts stress on the battery – kind of like keeping a bow fully strung and at full draw most of the time, which, as any archer will tell you, isn’t good for the bow.

This means that ideally, you should avoid hitting these extremes.  This means that exhausting your battery’s charge completely is a bad idea.  However, so is topping it up to 100% all the time.

At this point, those of you who are familiar with rechargeable NiCad batteries will be scratching your heads because you’ve heard of “battery memory”.  NiCad rechargeables (these are the sort that you buy to put in things that come with the label Batteries Not Included) do have a “memory”, meaning that if you are in the habit of recharging the batteries when they hit 10% charge, they’ll start acting as though 10% is the new zero.  However, lithium ion batteries don’t have a battery memory effect, meaning that you won’t reduce their charging capacity if you top up the battery’s charge when it dips below a certain level.

In fact, what manufacturers recommend for preserving the life of a battery sounds rather like the principles used for managing blood sugar in Type 1 (insulin-dependent) diabetes.  You don’t want things to drop too low, but you don’t want them to go too high, either.  The ideal is to keep batteries between 80% charge (which is why the charging times given by EV manufacturers are usually the time taken to reach 80% charge) and either 20% or 40% charge. On top of that, rapid charges and rapid discharges also stress the battery.

In practice, this means the following:

• Don’t recharge your EV to overnight every night. However, you need to balance this against what you know about how and where you’ll be driving and where the accessible chargers are.
• Don’t let the battery drain too quickly. This means that you have to be very careful when it comes to things like towing, going uphill and running too many things that require electricity at once.  In other words, if it’s a freezing cold rainy night when having the lights, wipers and heaters going is a must, then you have to decide if it’s really worth it to use the sound system as well.
• Although DC rapid charging is convenient, it does stress the battery, so reserve this for when you absolutely have to.  DC rapid charging isn’t catastrophic for your EV’s battery and you can do it now and then without putting a serious dent in your lifespan, but it does put a bit more stress on it than slower AC charging, so don’t do it all the time.
• Extreme temperatures make the lithium in the batteries do funny things.  Getting too hot is the most dramatic, but most modern battery packs (thank goodness!) have cooling systems to ensure that they don’t overheat (these systems use the battery’s own charge to operate).  Getting too cold is also a problem, as the electrochemical reaction producing the charge is slowed right down, which translates to reduced range and slower charging times. Some battery packs, notably in Tesla vehicles, have systems that keep them at the ideal temperature – though at the cost of range. However, these can drain the battery more quickly, which shortens the lifespan.
• If your EV has to go into long-term storage, keep it on a trickle charger or a smart charger to ensure that it stays about half charged.

Plugging In A Plug-In

Like anything else with batteries, an EV of the PHEV or BEV type (i.e., plug-in hybrid EVs and full battery EVs), will need to be plugged in and charged. In my previous article, I talked about the different types of charger and the different charging speeds.

However, there’s more to know if you’re new to the world of EVs and plugging in instead of filling up.  This is because different vehicles have different types of connectors or plugs. Obviously, you can only plug into something that has a compatible connector. This may sound confusing if you’re used to filling up a petrol or diesel tank, where one size fits all. However, if you’re used to negotiating all those different cables and chargers for Android phones, Apple phones, USB chargers and HDMI cables, then you will easily get the hang of the different connector types used in EVs.

There are a few basic types: Type 1, Type 2, CCS 2 and CHAdeMO. All of these have different pin patterns, meaning that you can’t plug the wrong one in by mistake (kind of makes you wish they had done something similar with ICE vehicles so that nobody put petrol in a diesel tank or vice versa).

Type 1 AC connectors are also known as J1772 or SAE J1772 connectors, or just J plugs. They are mostly found on older EVs and PHEVs. The connector has five pins that look a bit like a smiley face.

Type 2 AC connectors are also called Mennekes connectors after the German company that invented them. They look a bit like a mutant hair dryer. They are the standard connector in Australia and Europe found on most EVs sold in the country today.  Type 2 Mennekes connectors is often found in combination with the CCS connector – if you look carefully, you can see that the “surprised face” circles in the top part of the CCS connector combo is hidden in the seven circles of the Mennekes connector.

Tesla connectors are based on the Type 2 connector to allow you to use it to charge a Tesla at home via AC charging but has a special lock-out design for the DC chargers, meaning that only Teslas can charge up from the dedicated Tesla DC ultrafast charging systems.

CCS stands for combined charging system. The bottom half of a CCS connector allows for fast DC charging from public outlets, while the top half is for AC charging. Although it is possible to find EV models that have Type 1 up the top and the DC connector down the bottom, these are very rare in the Australian market. Most EVs in Australia that have these CCS connectors (technically, these are CCS 2 connectors) will have a Type 2 pin arrangement up the top.

CHAdeMO connectors get their name from the French phrase “Charge de Move” (“movement using charge”). Rumour also has it that it was derived from the Japanese phrase “o cha demo ikaga desuka”, which means “How about a cup of tea?”, as the idea was that charging with a CHAdeMO charger would take as long as having a cup of tea.  I don’t know how long it takes you to have a cup of tea, but I don’t think they’re referring to the full Japanese tea ceremony here, which can take up to four hours. However, the CHAdeMO connector is used for DC fast charging, which can take about half an hour. These connectors are mostly found on earlier Japanese models such as the Nissan Leaf.  

When you buy an EV, it will probably come with at least one cable so you can plug it in and get started. However, it’s often a good idea to have a range of different cables with different connectors. For example, you can get a cable that can plug into a Type 1 outlet even though you’ve got a Type 2 input in your EV, or one with Type 2 at both ends for public charging stations where BYO cable is the expected way to proceed. If you’re anything like me when it comes to cables and remembering what goes in where, it might be a good idea to attach a label or colour-code the different cables if you have several, and to store them in separate bags.

How 5G Technology is Transforming the Future of Automotive Connectivity 

Technology-driven ecosystems are quickly emerging in the automotive industry.

What we expect of a vehicle is evolving – from a tool used to merely move us from point A to B, to an integrated and fully connected tech-hub! Yes, you read that right – and it’s all due to 5G.

5G is becoming an integral part of technological transformation in the automotive industry.

So, to enlighten you about what 5G technology can bring to automotive connectivity, we’ve defined what this technology is and listed some of the key benefits you’ll experience with 5G connected vehicles.

What is 5G technology?

5G is the fifth generation of cellular technology, and it’s set to transform our daily lives by virtually connecting everyone and everything together with faster latency than any previous cellular technology.

Fast-paced, reliable connectivity will allow billions of devices to use and transmit data in more places, bringing major advancements to the IoT (Internet of Things), Virtual Reality (VR), Artificial Intelligence (AI) and more.

How does 5G impact the vehicle industry?

When it comes to automobiles, 5G allows for vehicle-to-vehicle communication in real-time which could deliver reliable connections with lower latency. The reliable and high-volume data transfer enabled by 5G unlocks the potential for V2X (vehicle-to-everything) and V2V (vehicle-to-vehicle) communication – which in turn, unlocks the potential for a variety of features that enhance road safety and convenience for the user.

4 ways 5G network coverage is redefining the driving experience

With the demand for greater connectivity set to soar, 5G-enabled connected cars will become the new norm.

Here are 4 ways 5G will enhance vehicles in the near future:

1. Improved safety

With an increasing number of road fatalities in Australia, safety applications of 5G are of great importance.

Here are some of the applications of 5G in the safety features of cars:

• Speed Control - When connected to the network via 5G, cars can be programmed to automatically adjust speeds based on road closures, congestion or accidents and prepare the driver in advance, avoiding mishaps such as collisions or pileups.
  
  
• Alerts - 5G connectivity can be used to detect obstacles by opting to assist in NLOS (non-line-of-sight) scenarios, activate emergency braking warnings, or even crash warnings to avoid accidents.
  
  
• Intersection Management - 5G in cars when connected with multiple cameras at intersections can be used to manage traffic better and increase safety.
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2. Improved driving experience

Driver demand for connectivity is increasing as people become more familiar with and reliant on the benefits of staying connected. 

According to research, around 40% of global consumers would change car brands just to gain more connectivity. Here are some of the applications of 5G in improving your driving experience:

• Navigation - With 5G entering the picture, navigation is likely to get more accurate with real-time map updates and 3D imaging.
  
  
• Media - Using the 5G network, connected cars will be able to stream rich HD media content to their infotainment systems directly – which means more entertainment, more often.
  
  

3. Efficiency

The 5G network can be used intelligently for delivering value in fleet and commercial vehicles. This can help reduce costs as well as fuel consumption through:

• Route Optimisation - Using real-time maps and traffic data, vehicles can plan faster trips by optimising their routes, therefore reducing the overall cost of travel.
  
  
• Platooning - With the help of high-speed networks that operate in real-time, commercial vehicles can drive in a coordinated fashion and maintain a fixed distance between each other, resulting in lower fuel consumption, costs and carbon emissions – all enabled by 5G.
  
  

4. Faster freight and shipping

Vehicles that transport our goods will also be getting a makeover thanks to 5G. The logistics industry expects to see faster deliveries and less revenue leakage as a result.

These are some of the projected advancements in the logistics industry:

• Virtual reality road assistance – Companies will be able to manage fleet maintenance using a remote mechanic. This will speed up roadside assistance, getting autonomous trucks back on the road faster to improve delivery times.
  
  
• Advanced location tracking – “Dead zones” may become a thing of the past thanks to 5G. With more accurate and advanced geo-location technology, travel delays in remote and rural areas will be easier to track.

The long list of exciting benefits we stand to gain from 5G-connected vehicles is why the future of the automotive industry is infinitely bright. However, the industry requires huge investments to improve network performance and to have a significant impact on the automotive ecosystem.

Ready to drive smarter on the road with a 5G-connected vehicle?

The automotive industry is experiencing changes driven by digital transformation.

So, whenever you’re ready to take the next step towards a 5G-connected car, it helps to have a vehicle expert who can guide you. If you have questions about smart cars and how you can choose the right one for you, simply reach out to us for a chat.

Find the right smart vehicle for you with Private Fleet.

Private Fleet empowers you to gain all the benefits of a fleet purchase, but as a private buyer.

Backed by decades of vehicle industry experience, fleet buying power and a network of car dealers across Australia, we are here to ensure that buying a 5G-connected car will be as straightforward as possible for you.

Buying a new car is a memorable experience – let us make it hassle-free, too.

Reach out to us today for a seamless and easy car-buying experience.