Most Unmanned Systems are powered by batteries. The most commonly-used battery technologies in ACTIVEROBOTICX Unmanned Systems are lithium-based, as they have a higher energy density and so provide excellent power to unit weight ratio. The prevalent lithium battery chemistries are Lithium Polymer(LiPo) and Lithium Ion. Lithium Sulpur technologies are also being developed which can provide greater efficiencies in battery performance.
Lithium battery technologies are a popular choise for ACTIVEROBOTICX Unmanned Systems, as the cells can be enclosed in thin, flexible aluminium pouches. This configuration saves weight compared to other battery chemistry solutions and also allows for a wider variety of design configurations.
In a typical Unmanned System, many different components, such as propulsion systems, processors and sensors, may all have different voltage and load requirements. A battery in an Unmanned System will undergo continuously varying loads and have a wide range of demands placed on it.
In Unmanned Systems, autonomy is critically dependent on the battery life, and a condition in which the battery becomes wholly drained during a task can be disastrous. To avoid this, ACTIVEROBOTICX provides advanced battery management systems that will continuously monitor essential power supply conditions, and deal with the varying power demands of the many aspects of the Unmanned Systems operation and optimising the usage of the battery.
The battery management system may monitor battery voltage, current, temperature, state of charge, state of health and other parameters, and may calculate additional information based on these. This data can be reported to the operator’s controller via the communications link.
In addition to managing the battery usage, the battery management system can also protect the battery during charging, safeguarding against conditions such as over-current or over-voltage.