BMW To Develop Battery Cells Specific To Vehicle Height

MAY 8 2018 BY ANTHONY KARR 17

The Bavarians are developing different battery cells for the different types of cars.

To make sure future EVs will be as beautiful as its ICE-powered cars are today, BMW is currently developing different battery cells for the different types of electric cars it will soon produce.

Related – BMW iX3 Will Herald In Automaker’s 5th Generation EV Powertrain

Simply put, the all-electric and plug-in hybrid coupes and sedans won’t feature battery cells that are as tall as the cells that are going to be used in electrified SUVs. This separation will have a positive impact not only on the design, but also on the center of gravity. Because, you know, we still want coupes to sit lower to the ground than SUVs and crossovers.

BMW doesn’t plan to produce battery cells in-house, but it is already running a battery technology facility, where it designs battery cells and control software. The Bavarian company wants to have multi-sized lithium ion cells ready for the launch of what it describes as the fifth phase of its electrification strategy in 2021. In three years, the automaker will release its flagship electric vehicle, tentatively called the i9, which will be produced at BMW’s factory in Dingolfing, Germany.

In 2021, BMW will also begin launching new electrified and conventional models, based on two new platforms. FAAR will underpin front-wheel-drive and AWD cars, while an updated version of the CLAR architecture will be used for the RWD vehicles. The new platforms will be able to house three different battery packs, from 60 kilowatt hour to 120 kWh, offering range from 280 miles (450 kilometers) to 435 miles (700 km).

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Source: Automotive News

Categories: Battery Tech, BMW

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17 Comments on "BMW To Develop Battery Cells Specific To Vehicle Height"

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EvilDwarf
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EvilDwarf

ummmm. How about they just have one size cell and mass produce it so it’s cheaper. Then they can have these things. Lets call them “modules” and just have more in a car when they want it to go further. Put the same type of module in each car and mass produce them. No charge BMW for my consultancy. 😉

Jason
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Jason

It’s just the ICE way of thinking. Why do the simple, logical, thing when you can take the complex, difficult path? If you have more height, just double layer the cells. Keeping the cells to one format would have to be more cost effective than designing and building 2 or more different sized cells? Weird where these companies are heading.

dan
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dan

You shouldn’t double layer a cell. If you do that, the heat will rise and cook the top layer of cells and cause them to die faster than the bottom ones. The well designed battery packs always stack the cells aligned vertically with the terminals on top.

Also, Samsung already has different cell heights. The e-Golf uses cells that are much shorter than the i3 even though both are Samsung SDI. In fact, Samsung makes 4-5 different cell heights in its factory. Some of the much shorter ones are used exclusively in PHEVs.

Brian
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Brian

Contrary to popular opinion, Dan, heat does not rise. Hot air rises because it is less dense than cold air. Heat in a solid will always go from hotter to colder areas, regardless of gravity.

That said, having layers of cells can still develop hot spots – they’ll just be in the center of the battery, not the top. It’s nothing that a properly designed TMS cannot overcome.

dan
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dan

Brian, that is only true theoretically. The modules are not in a vacuum. The air that comes in contact with the cells will rise and will heat up the top layer of your cells if you simply stack them up without isolating the two layers (which will make the pack expensive and heavy).

Brian
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Brian

Ok, there will be some small amount of convective heat transfer within the case, but the effect of it will be much less than you seem to be implying. There is no way that it would transfer enough heat that the top layer of cells are heat-damaged and the bottom are not.

Stanislav
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Stanislav

You can’t double layers of cells. Take 2170 for example, its 7cm in height, and BMW probably would like to have that in sedans, and maybe cells that are 8 or 9cm high for SUVs, if you double 2170 thats 14cm… just cells! That would be stupid car in every way

philip d
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philip d

Exactly. They could look at other companies that have done this for reference. Like oh, say Tesla.

Johan M
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Johan M

LOL, BMW has nothing to learn from Tesla. Any Tesla is like a boat to drive compared to BMWs. I’m confident that BMW is doing the exact right thing. Surely a Tesla can take you from A to B, but in a BMW it will be a pleasure to go from A to B.

AtlantaCourier
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AtlantaCourier

“B” being the Tesla delivery center…that was the last, most enjoyable trip I ever made in my BMW

William L
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William L

I hope you have experience driving both cars before making this comment.
I had a few 5 series and switched to Tesla. It’s no comparison, Tesla MS is way better than BMW.

eject
Guest
eject

No one cares about cylindrical toy cells.

eject
Guest
eject

As if this matters when they make millions of cars of each body shape.

AtlantaCourier
Guest
AtlantaCourier

Seriously, they should customize each individual cell just like was done for the thermal tiles on the Space Shuttle. In this way, they can really fine-tune the exact height and weight of each cell in order to optimize the center of gravity. Average people will hate this cos it will cost a lot, but is that really important?

eject
Guest
eject

Finally, end this SUV CUV nonsense and build cars again. For normal non fat people.

Brian
Guest
Brian

And people who like to drive, and aren’t just worried about getting to point B with the greatest risk to others’ health and least risk to their own.

dan
Guest
dan

Unless you ride in the trunk, what does your size have to do with whether you drive a sedan or a CUV? You realize that CUVs/wagons are the exact same thing, right? It’s just marketing. There are very few traditional “SUVs” that were built on truck frames left today.