Amprius Raises $30 Million To Accelerate Commercialization Of High Energy Batteries

JAN 10 2014 BY MARK KANE 15

Tesla Model S with such batteries coudl go 2,000 miles on a charge?

Could a Tesla Model S with such batteries theoretically go 500 miles on a charge?

Amprius, a California start-up that’s developing lithium-ion batteries with silicon anodes, announced it raised $30 million to accelerate commercialization of high energy batteries.

“Amprius will use the funds to commercialize its high energy and high capacity batteries and further develop the next generations of its advanced batteries.”

“SAIF Partners, a leading Asian private equity firm, led the financing, in which all of Amprius’ previous investors participated. Amprius’ Series A and B investors include Trident Capital, VantagePoint Capital Partners, IPV Capital, Kleiner Perkins Caufield & Byers, Chinergy Capital, Google Chairman Eric Schmidt, and Stanford University.”

We still don’t know what “high energy batteries” really means in terms Wh/kg, but it should at least double current lithium-ions because silicon anodes have great potential (and lots of problems too).

$30 million in Series C funding comes after Amprius started production cells on a pilot production line for advanced battery development in Nanjing, China for demonstration purposes.

The cells have a volumetric energy density of 580-600 Wh/L depending on size. None of these cells are currently appropriate for EVs, but if the company raised $30M, there must be some potential to introduce it on the market.

Andrew Yan, Founding Managing Partner of SAIF Partners stated:

“Amprius’ advanced technologies address consumer demand for high energy, long life batteries. We are delighted to invest in Amprius and accelerate the company’s international growth. SAIF Partners supports Amprius’ short-term focus on consumer electronics and shares the company’s medium- and long-term interest in electric transportation.”
Dr. Kang Sun, CEO of Amprius commented:
“Amprius products have received significant attention and enthusiastic responses from customers worldwide. Series C funding will hasten the commercialization of our high energy and high capacity batteries and the on-going development of silicon-based anodes, advanced cathodes, and innovative manufacturing processes.”

Categories: Battery Tech


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15 Comments on "Amprius Raises $30 Million To Accelerate Commercialization Of High Energy Batteries"

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Currently I believe Toshiba’s store about introducing EV batteries that are 30% more energy dense over existing batteries then a story like this about super science fiction battery. Granted I wish it did exist. Here is the story I found on Toshiba talking about upgrading their batteries for their EV’s The Mitsubishi i-Mev electric car from what I have been running around on to the internet might be the first existing electric car for sale to raise it’s range from the range it started out with in mid 2014 or late 2014. Where I got this rumor from was from Toshiba that around the middle of 2014 they where going to introduce a new bend in their electric car batteries that would allow it to have the same mass and size but with 30% more energy in it. If Mitsubishi is trying to do something about their EV’s crappy range of 62 miles they could in theory replace their existing batteries with these new batteries and get 80 miles range without having to rebuild the battery pack support system in the same car. I suspect that with them having some of the lowest battery ranges in the industry most of… Read more »

Thanks for info :). Interesting

“I suspect that with them having some of the lowest battery ranges in the industry most of everyone else is getting 80 miles on a charge and some new comers are going for 90 plus they would be under the most pressure to raise there car’s range.”

The i-MiEV goes 62 EPA-rated miles on 16kWh of batteries. The Chevy Volt goes 38 EPA-rated miles on 16kWh of batteries.

The i-MiEV’s range is directly related to the size of the battery. If they put a 24kWh battery, like the Nissan LEAF, the i-MiEV could go 93 EPA-rated miles on a charge.

Don’t confuse the issue with your dislike of the i-MiEV.

I don’t dislike the i-Mev based on looks or body shape in that I thought it was a nice car when I saw it in real life. The reason why was a few weeks ago one of the car dealerships in our area had a used one for $17,000 that I could get side of it and look at it. The car’s side looked a lot bigger then a existing car that I had and it was bigger looking then the Nissan Leaf. I also liked how it didn’t have the gadget clutter that the Nissan leaf had in it. The thing though that kind of hurt my feelings about it was it had only a 62 mile battery range which would kind of make it useless expect on the weekends in that I wouldn’t feel to cozy about driving it 25 miles each way on the weekdays and if something blocks the main road I drive and I have to add another 15 miles on my trip to go around. If they do add range to it get it from 60 to 80 and maybe even 90 miles it would rewrite the rules for me and a lot of… Read more »

I think 250Wh/L is less than half of what Tesla is using, though.

>Could a Tesla Model S with such batteries theoretically go 500 miles on a charge?
Of course, what kind of silly question is that? 🙂
It will be interesting when they get to 1000 miles. Then I can drive from San Fran to Phoenix without stopping. 😛 Even more interesting when you get cheap cars that can do this. It will happen sooner than you think. Lots of research in battery tech. Perhaps a dozen years.

Oddly about a EV if the battery has the same size and mass as the old one couldn’t you drop a 300 mile 300 pound battery pack in the place of a old 70 mile 650 pound battery pack of a old Nissan leaf.

Why would that be interesting? For any technology that got you to 1000 miles range, you could take 1/5 of that and have a perfectly reasonable long distance car: 200 miles range/65 miles an hour = 3 hours which is greater than human bladder range at about 2 hours.

The resulting car would be dramatically more energy efficient, since it is not hauling around the weight of a huge battery all of the time.

While I believe a lot is possible, I’m less than convinced that this 30m$ will be anything but professionally flushed down the toilet.

The simple truth is that you can simulate any chemistry and any structure you want and watch the effects and deterioration until you find a viable configuration. That process doesn’t cost much. From what little I know about silicon anode batteries, the problem is that it swells so much that the structures are quickly destroyed so the batteries doesn’t live long. I’m guessing they don’t have a viable design around that problem yet so they don’t need 30m$.
There seems to be quite a few battery startups posturing that they have something when they actually don’t. And they get quite a bit of money. Envia got more than this doing similar until it recently came out that they aint got squat.
They always say our technology. They never say our working prototype. Because their ‘tech’ doesn’t work.

“The cells have a volumetric energy density of 580-600 Wh/L depending on size.”

Since the “L” stands for Liter, it seems clear the energy density is 580-600 watt-hours per liter. Are you stating that a 2-liter volume battery doesn’t have double the watt-hours?

I wonder what happened to the second gen A123 battery chemistry?


They went into second gen bankruptcy.

too much nerd stuff

Why aren’t batteries following Moore’s Law. Countless EV experts insisted they would. Well, it ain’t a ;law and it doesn’t apply to batteries. But 2x capacity and 1/2 the cost would really put the EV world in a sweet spot.

Because batteries aren’t subject to Moore’s law, only semiconductors are. And even Moore’s law for semiconductors is about to end here in the next few years – once we get down to about 10nm structures, its going to be ridiculously difficult to get smaller.

Batteries are 8% or so a year. Maybe that speeds up more over the next five years because of the immense amount of R&D going into batteries right now.