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Li-ion batteries play a vital role in electromechanical devices. The heat  load on such batteries varies with time and application which falls as  high-temperature rise and it causes severe damages on a device and reduces  the life cycle. It will be a big challenge in future decades of electronic  devices and the electric car revolution. To overcome such difficulties, this  work is considered for thermal management of small Li-ion batteries to check  the possibilities through the micro heat pipe. Due to the high impact of  Nanotechnology in heat transfer science, Acetone, De-ionized water, and  Tetrahydrofuran fluids are blended with Graphene Oxide Nanoparticles to  prepare the Nanofluids by ultrasonic method. Here, Tetrahydrofuran is a new  combination of Nano-working fluid and not addressed by pre-researchers.  Tetrahydrofuran-graphene Nanofluid provides 61% of improved thermal  conductivity than the other two fluids which accelerates the heat transfer  rate with reduced thermal resistance in the range of 0.09- 0.640C/W. To  validate the experimental results, a real-time study has been done on Li-ion  batteries for a day and ensured the reduction of overheat issues. Hence, the  present work will support the Li-ion battery to work in an optimal  temperature range in a new way of micro heat pipe with Nanofluid.

Heat transfer analysis of looped micro heat pipes with graphene oxide nanofluid for Li-ion battery