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Toshiba’s SCiB battery for the Fit EV

20Ah-SCiB_TMcell
20Ah SCiB cell. Click to enlarge.

Honda selected Toshiba Corporation’s SCiB rechargeable Li-ion battery to power the Fit EV. (Earlier post.) Toshiba will supply battery modules for the new car, which Honda will launch in summer 2012 in Japan and the US.

In 2010, Toshiba announced that it was working with Mitsubishi Motors Corporation to bring the SCiB battery (earlier post) to electric vehicles (EVs). (Earlier post.) Toshiba developed the SCiB module for the FIT EV with Honda; the module was supplied to Honda in December 2010 for evaluation in real-world verification testing of next-generation personal mobility products that the company conducted with Saitama and Kumamoto prefectures.

Honda selected the SCiB module for the FIT EV after a comprehensive evaluation program that tested the battery’s performance under diverse and demanding conditions.

The SCiB cells use lithium titanate oxide in the battery anode, enabling rapid charge times and a long battery life, with stable power discharge in a wide range of environments. In extremely cold conditions as low as -30°C the SCiB is less likely to experience lithium metal deposition, which enhances the risk of internal short circuiting and battery degradation, and at high temperature, even above 40°C, the impact on battery degradation is lower than in conventional lithium-ion batteries, according to Toshiba.

The characteristics of the SCiB battery cell enable longer range for electric vehicles; the SCiB is able to use a wider state of charge window than a conventional lithium-ion battery, and the SCiB also achieves efficient regenerative charging (using kinetic energy from braking and slowing down to charge the battery) that adds to performance.

The SCiB charges in about half the time of a typical Li-ion battery, Toshiba says. An SCiB 20Ah cell charged with an 80Ah current will reach 80% of capacity in 15 minutes and 95% in an additional 3 minutes. The SCiB generates little heat even during this fast recharging, eliminating the need for power to cool the battery module. Moreover, the full charge-discharge cycle for SCiB is 4,000 times, more than 2.5 times that of other Li-ion batteries. This long life could also contribute to the reuse of the battery.

Toshiba says that it will take full advantage of Honda’s selection of the SCiBT to promote its further application in electric vehicles. The company will also promote use of the battery in other areas, including as a stationary power storage device in smart grids.

Comments

kelly

This battery, with it's quick charge specs, has been around since 2007. Glad to see it's used on more than a bicycle and may the price be low enough.

HarveyD

Extra long life, very deep & very quick discharge/recharge capabilities, all weather operation etc etc could make this battery a real work horse for electrified vehicles.

The average energy density and high cost will be improved with better assembly/materials and mass production.

Davemart

Woo-hoo, or however this American exclamation of great joy is spelt!
this battery is a real game changer, and it is wonderful to see it in cars.

HarveyD

Yes DM...so far, only Harold H. Kung (from Northwestern U.) and Dr Fichtner & Reddy (from KIT) have designed much superior batteries, but they are 3 to 5 years from commercialization while the Toshiba unit could be installed in 2012 EVs.

It seems that 2015-2017 could be the year of commercialization of breakthrough EV batteries with 10x the energy density capacity, quicker charge/discharge and longer life under adverse conditions.

Meanwhile, this Toshiba unit is an excellent interim solution.

Nick Lyons

95% charge in 18 minutes? Wow.

Bob Wallace

"full charge-discharge cycle for SCiB is 4,000 times"

Am I correct in thinking that if you had a 100 mile range EV using these batteries and did ~full discharge each use you should expect a 400,000 mile lifespan for the batteries?

kelly

Yes Bob, that's the claim. Such a lifespan could really lower the per mile costs.

And if 80% capacity is still left, imagine the thousands of 3rd world cell phones that could still be recharged.

GreenPlease

400,000miles to 80% at which point the batteries are still quite useful.

TOC (ex chasis, motor, and a few others)

SCiB BEV
20kw/h battery at $500/kw/h=$10,000
20kw/h per 123 miles (per Honda press release)=6.15miles per kw/h
400,000miles/6.15= 65,040kw/h @ $0.10/kw/h=$6,504
$6,504/0.90 (charging losses)= $7,226
TOC $17,226

Internal Combustion Engine
30mpg (combined rating) 400,000/miles/30mpg=13,333gallons
13,333x$3.50/gallon (conservative)= $46,666

The SCiB Fit comes out WAY ahead. Even if you price the batteries at $1/w it still comes out way ahead and I'm not even counting the savings from reduced service costs (oil changes, filter changes, tune ups, etc).

Bob Wallace

With 400,000 mile batteries and industrial quality electric motors we could reach a point at which you would buy an EV and after 150,000 - 200,000 miles buy a 'sled' and have your batteries and motor transplanted.

Send the old worn out body and frame off for recycling.

Davemart

Actually for a 4,000 cycle battery down to 80% with 100 mile range you should take 90 miles as the average range over time, so you get 360,000 miles in total.
From the specs I have seen I think that Toshiba is just being conservative in their claims though as they claim 6,000 fast charge cycles for the chemically similar 4.2 Ah battery.
To be able to get maximum range they have likely allowed an SOC of 95%, and so chopped the cycle life accordingly.
In practise though most will only do around 12,000 miles a year, or 33 miles/day, and so will rarely drain the battery and shorten cycle life.
I reckon most people will get around 500,000 miles out of these, which is not 'too bad!' ;-)

HarveyD

BW may be correct, specially if made of aluminium and/or re-enforced plastics. If so, our Big-3 will not be interested to sell us electrified vehicles good for 500,000+ miles. That would mean 5 times less vehicles to build and sell and even a lot less to repair.

Could you imagine 4 out of every 5 car plants closing down and probably 9 out of 10 repair shops and part dealers closing their doors.

The arrival of high quality longer lasting EVs will change and even send a shock wave throughout the car market/industry. A lot of people will have to look for other jobs (if any to be found).

The 20-hour (2.5 days) work week may not be that far away.

Bob Wallace

Our Big-3 will sell us what we purchase. There's far too much competition world-wide for even a group of manufacturers to control production.

The entry level for producing EVs is much lower than producing ICEVs. Electric motors and batteries can be purchased from a variety of manufacturers. "Windshields and seats" are made by lots of manufacturers. Car companies are becoming designers and assemblers.

Imagine one or more companies marketing the frames and running gear for body-on-frame EVs. Other companies designing bolt-on bodies. Putting that together with the best battery pack and motors to fit the design.

We could have incredible choice in body style and features.

A stainless steel or aluminum frame could mean multiple bodies using the same frame/batteries/motor.

--

Perhaps a 40 hour week with a 20 year work career might be a better route. Keep the younger ones busy until they've outgrown their "youthful ways"..... ;o)

HarveyD

Yes Bob....future basic EVs could be assembled 1001 different ways. With in-wheels e-motors, modular batteries, snap-in seats, standardized black box controls and cables, etc one could imagine buying a basic BEV as a kit and snapping it together in the home garage.

Mass produced, standardized, pre-painted sub-assemblies, purchased at IKEA or equivalent, could be assembled by future buyers during their extended spare time.

Working 2 or 3 days a week for 40 years may be better for our children's and grand-children's health than retiring at 40? They may elect to choose how to best distribute reduced work hours. No one unique system may be used but there will be less work hours available unless we start building pyramids again.

JMartin

You guys are dreaming. We will have 10% of the people working 60-80 hours a week and making all the money there is, while the remainder are unemployed and starving -- it is the free enterprise model.

If our society could redefine "quality of life" as something other than GDP, things might change. Come to think of it, when 90% are unemployed, things will change. Oh yes think 3D printing for the bodies.

3PeaceSweet

With a decent composite body a vehicle could last a long time

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