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Amprius delivers large shipment of SiMaxxTM batteries to Korean Aerospace Research Institute

March 14, 2024

Amprius Technologies, Inc. has announced it has sent a high-volume shipment of SiMaxx cells to the Korean Aerospace Research Institute (KARI), further solidifying Amprius’ role in High-Altitude Pseudo-Satellite (HAPS) battery applications.

In December 2023, Amprius shipped its 450 Wh/kg SiMaxx cells to KARI, which will be used to power its solar-powered stratospheric full-scale vehicle. The SiMaxx cells are designed to reduce weight and significantly increase aircraft flight distance range. These cells are the only known commercially available batteries capable of providing sufficient power and endurance for HAPS overnight stratospheric flight applications.

They can enable higher payloads and operation in all seasons and higher latitudes. The cells are also customizable, providing greater flexibility to meet specific energy and power needs, thereby enhancing performance effectiveness and efficiency.

Amprius’ 450 Wh/kg custom cell form factors are expected to improve performance across several applications, including electric aviation and high-energy storage applications for the military. These cells are expected to be manufactured in large-scale production at Amprius’ facility in Colorado, which is targeted to be operational in 2025.

The company’s SiMaxx batteries deliver up to 450 Wh/kg and 1,150 Wh/L, with third-party validation of 500 Wh/kg and 1,300 Wh/L. Amprius has its corporate headquarters in Fremont, California, where it maintains an R&D lab and a MWh scale manufacturing facility for the fabrication of silicon anodes and cells.