Tesla CEO Elon Musk said that Tesla is expected to mass-produce batteries with a longer life and a 50% increase in energy density within 3-4 years.
Before the Tesla "Battery Day" event, Musk said on Twitter on Monday, "It is not far away to mass produce long-life batteries with an energy density of more than 400 watt-hours per kilogram (Wh/kg). It takes about 3 to 4 year."
The researchers said that the energy density of the Panasonic "2170" battery used in the Tesla Model 3 is approximately 260 watt-hours per kilogram. This means that Tesla's new battery has jumped 50% compared to the current energy density, which is essential for achieving longer driving range.
Tesla previously confirmed that its battery day will be held on the same day (September 22) as the upcoming 2020 Annual General Meeting of Shareholders. However, affected by the new crown epidemic, only a very small number of shareholders can participate in the Battery Day event on September 22, and the company will select participants.
The background image of the Tesla Battery Day event announcement page made people think. South Korean battery expert Park Chul-wan said that the background image may suggest "silicon nanowire batteries," a breakthrough technology that can significantly improve battery energy density and battery life.
Silicon nanowire is a new type of one-dimensional semiconductor nanomaterial. The diameter of the wire is generally about 10 nm. The inner crystal core is single crystal silicon, and the outer layer has a SiO2 coating layer. Some progress has been made in the application research of nanoelectronic devices such as logic gates and counters in microelectronic circuits, field emission devices, nanosensors, and templates for assisting the synthesis of other nanomaterials.
At present, the core technology of American battery start-up Amprius is using silicon nanowires to manufacture battery negative electrodes, and Amprius`s address is close to Tesla`s Fremont plant in California. Fremont is also Tesla`s upcoming “Battery Day”. "Location of the event.
The outside world cannot help but speculate that Tesla is likely to cooperate with Amprius.