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Accelerated life testing (ALT) of batteries is performed to estimate the number of life cycles a battery can withstand in any mission fulfilling the mission power requirements. This test is destructive; therefore the battery cycles are exhausted completely. For ALT, selective samples are used to qualify the whole lot. Life of any space mission is dictated by batteries used in the mission, therefore the qualification process of batteries is quite critical. The present paper elaborates the design and development of Accelerated Life Tester for batteries (all types) according to the requirements of the Society of Automotive Engineer (SAE) standards. The setup is able to perform both charge and discharge cycles simultaneously with programmable cutoff voltage and current limits. Dedicated data acquisition system (DAQ) is developed in LabView that is capable of receiving data at high rates. Different sensors are used to monitor and control the test. The recorded data include body temperature of batteries, terminal voltages and current drawn. The real time data is stored in the LabView data file for post processing and at the same time it is shown as real time graphs for monitoring the test through a graphical user interface (GUI). Qualification of batteries is performed on selected samples in extreme test conditions, including high temperature, a high discharge rate and a high depth of discharge (DOD). The present setup provides these test conditions for performing ALT of batteries. The GUI controls every function of the test centrally, from test initiation to test termination that makes the test setup fully automated.

Syed Muhammad Arsalan Bashir, Syed Kazim Hasan Zaidi, Muhammad Zaheer. (2015) Design and Development of Accelerated Life Tester for Qualification of Batteries, Journal of Space Technology , Volume 5, Issue 1.
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