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"400 Wh/kg *with* high cycle life, produced in volume (not just
a lab) is not far. Probably 3 to 4 years," Musk tweeted on
Monday ahead of its anticipated "Battery Day" event where Tesla
is expected to reveal how it has improved its battery
performance.
Researchers have said the energy density of Panasonic's <6752.T>
"2170" batteries used in Tesla's Model 3 is around 260Wh/kg,
meaning a 50% jump from the current energy density which is key
to achieving a longer driving range.
Tesla said its Battery Day will take place on the same day as
its 2020 annual meeting of shareholders on Sept. 22.
The electric car manufacturer also showed a background image
where a number of dots are clustered in line formations,
sparking speculation among media and fans about what it will
reveal at the event. (https://www.tesla.com/
2020shareholdermeeting)
South Korean battery expert Park Chul-wan said the image may
hint at "silicon nanowire anode," a breakthrough technology
which can potentially increase both battery energy density and
battery life sharply.
Panasonic Corp <6752.T> earlier told Reuters that it plans to
boost the energy density of the original "2170" battery cells it
supplies to Tesla by 20% in five years.
Tesla is also working with China's Contemporary Amperex
Technology Ltd (CATL) <300750.SZ> to introduce a new low-cost,
long-life battery in its Model 3 sedan in China later this year
or early next year, with the batteries designed to last for a
million miles of use, Reuters reported in May.
A very "limited number of stockholders" will be able to attend
the Sept. 22 events due to pandemic-related restrictions, Tesla
said, and a lottery will be held to select attendees.
(Reporting by Hyunjoo Jin and Makiko Yamazaki; Editing by
Jacqueline Wong)
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