Wednesday, May 25, 2022

Amprius ships the world’s highest energy density battery cells

Californian company Amprius Technologies has announced the shipment of the first batch of its 450 Wh/kg, 1150 Wh/L lithium-ion battery cells to an industry leader of a new generation of High-Altitude Pseudo Satellites (HAPS). The company claims these are the most energy-dense lithium batteries commercially available today.

The batteries’ impressive performance is the result is Amprius Technologies’ silicon nanowire anode (Si-Nanowire platform), which offers a unique combination of performance metrics, including fast charge (under 10 minutes), high power (10C rates), high energy density (over 400 Wh/kg) and long life (over 500 cycles). The company was able to achieve 450 Wh/kg just a few months after announcing the 405 Wh/kg product in November 2021. In December, we also learned about the 370 Wh/kg version, which can be recharged to 80% from 0% state of charge in just about 6 minutes.

“This advancement from the 405 Wh/kg product highlights the acceleration of our roadmap towards delivering products with unrivaled performance,” said Jon Bornstein, COO of Amprius Technologies. “Our proprietary Si-Nanowire platform and the comprehensive solutions we have developed enable unparalleled performance and continue to sustain our product leadership.”

This shipment represents the culmination of collaborative development and testing for this latest design win. Currently, Amprius Technologies, which has been in commercial manufacturing since 2018, produces the battery cells at a limited scale at its facility in Fremont, California. The company has embarked on constructing its first high-volume manufacturing facility located in the United States. A mass production site will be selected in the first quarter of 2022.

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