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May 2007
MINI QED Battery assembly
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In order to demonstrate the features of our new Hi-Pa Drive™ motors in the Mini QED
project we needed a very high performance battery.
Such batteries packs were not available 'off the shelf' so we had to build one using
what we believed to be the best cell available at the time.
The following components were chosen for the battery pack:
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Battery pack fitted to Mini QED
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- 80 Kokam 70Ahr Lithium-ion Polymer cells
- 6 Reap battery management modules
- 2 Omron high current DC contactors plus other associated switchgear and fuses
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Sub pack assemblies consisting of of 8 cells
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PML assembled the cells in groups of 8 cells per pack with a total of 10 packs being used.
The inter connection of the individual packs was re designed to massively improve the electrical
connection, pack to pack, and to increase the safety to the user.
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The completed battery is housed in an aluminium box that is similar in size and weight
to the original Mini engine that it replaced. The battery management system is assembled onto a top
plate above the battery packs.
When fully charged the battery pack stores 21 KWh of energy and is capable of delivering 100KW
continuously or 200KW for short periods of time.
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Fully assembled battery cells and BMS system
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Reap BMS fitted to top plate
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The chosen cells have a very low internal resistance and produce very little waste heat
when operating which is good both thermally and for power management efficiency.
The Reap battery management system ensures safe operation and long cell life. Every cell
is constantly monitored for voltage, state of charge and temperature.
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Tel: +44 (0) 1420 594140, Fax: +44 (0) 1420 83930, enq07@pmlflightlink.com
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Hi-Pa Drive™
