Power Systems You Can Depend On
Acme Aerospace Inc. is on the forefront of advanced battery, chargers and battery management system design. Our unique in-house capabilities and experience allows us a distinct approach to Li-Ion batteries with a focus on safety, performance, reliability and system integration. Acme is currently the battery supplier of choice of the Sikorsky S-97 RAIDER platform and is a team sponsor under Avionic Instruments LLC.
It is extremely important when considering the use of Li-Ion battery systems for airborne applications to consider its performance parameters, environment and how the battery is expected to integrate with the rest of the electrical system architecture, especially the charger and battery management system. These issues must be addressed and overcome on any platform in order to satisfy the current FAA Special Conditions Safety Criteria established by the authorities.
Acme’s smart Lithium-Ion battery system contains a balance between power density (reduced weight) and the necessary levels of redundant safety features to ensure fault isolation and avoid propagation failure. The engineers at Acme have evaluated all available chemistry options for Lithium-Ion cells and have identified multiple reliable sources for the different chemistries. Lithium Iron Phosphate has been chosen due to its thermal stability characteristics and overall safety. The battery system design includes the cells, charger, battery management system (BMS) and associated electronics to maintain the battery in a charged condtion and provide power when required for engine starting. The function of the BMS is to monitor, evaluate and protect the lithium chemistry cells
Acme Aerospace’s Li-Ion Battery System consists of the following components:
1. Lithium Ion Battery – The arrangement of cells is dependent on the technical parameters of the specified battery, but all cells are arranged in a physical configuration utilizing specific thermal materials to prevent cell failure propagation.
2. Battery Charger: The charger converts the unregulated 28 VDC input into a constant current -constant voltage (CC/CV) output to charge the battery.
3. Battery Management System (BMS): The BMS provides full protection for the battery in the case of over-voltage, under-voltage and over-temperature conditions. The BMS also controls the series cell balancing is achieved using a microcontroller.
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