Musk: Battery energy density is expected to increase by 50% within three to four years

On August 25, Tesla CEO Elon Musk said on Twitter that Tesla may mass-produce new batteries within three to four years. The energy density is expected to increase by 50%, and it will have more High cycle life.

Researchers have said that the Panasonic “2170” battery used in Tesla Model 3 has an energy density of about 260Wh/kg. When the energy density of the battery increases by 50%, it means that Tesla will achieve longer cruising range. It can even turn electric airplanes into reality.

Musk said last year that for electric flight to operate normally, the energy density of the battery needs to be increased to more than 400Wh/kg, which is a level that can be reached within five years.

Not long ago, Reuters reported that Tesla’s main battery supplier Panasonic will launch cobalt-free batteries within two to three years, and plans to increase the energy density of the “2170” batteries supplied to Tesla by 20% within five years. . Yasuaki Takamoto, head of Panasonic’s US electric vehicle battery business, said that in order to control the safety risks caused by higher density and lower cobalt content, Panasonic has now reduced the cobalt content in the “2170” battery cathode to less than 5%.

According to official sources, Tesla will hold a shareholder meeting and battery day activities on September 22, when Musk may announce the company’s latest battery technology and related information. At the same time, Tesla also showed an image in which many points are gathered in the form of lines.

South Korean battery expert Park Chul-wan said that the image may suggest a “silicon nanowire anode”, which is a breakthrough technology that can potentially significantly increase battery energy density and battery life.

According to a recent report by the US technology media Electrek, the Canadian battery research team led by Tesla battery expert Jeff Dahn is about to break through the technical barriers of new battery energy density, that is, to solve the defects of anodeless batteries through electrolyte solution. According to the Dan team, its energy density can reach 360Wh/kg, and its volumetric energy density can reach 1000Wh/L. “Such a high energy density can increase the cruising range of electric vehicles by about 280km, and even realize urban electrified aviation.”