Experimental Estimation for Thermal Control of Onboard Battery during Charging at the Launch Site

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  • 実験による衛星搭載用バッテリ充電時の温度評価
  • ジッケン ニ ヨル エイセイ トウサイヨウ バッテリ ジュウデンジ ノ オンド ヒョウカ

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Abstract

The purpose of developing NASDA’s Engineering Test Satellite (ETS) series is to acquire a common and base technologies of satellites. The ETS-VIII is being developed to establish and verify an advanced 3-ton-class spacecraft bus-system with a large-scale deployable reflector. The ETS-VIII will depend on battery power until the solar array panels are deployed. There are two battery units each of which consists of 18 battery cells in series. Thermal control of battery at the launch site is very important, because increasing of the battery’s temperature during charging brings inefficient charging performance, generating further heat. In advance, trial examinations, charging batteries and measuring the charged capacitance, were performed to make sure that ETS-VIII operation at the launch site can be completed. This paper describes the results of trial examinations, thermal analysis based on these examinations and proposals for launch operations about charging the battery.

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