Abstract:

According to the heat transfer characteristics in the individual pressure vessel (IPV) NiH₂ battery group, the mathematical and the physical model for the battery group was established and the finite differential method was adopted. By designing different geometric parameters for a practical individual pressure vessel NiH₂ battery group, the temperature fields were compared under the working condition of spacecraft. The results show that the sleeve thickness is the most sensitive to the change of temperature. By increasing the thickness of sleeve, the response time is shortened when the battery group arrives the thermal equilibrium. The sleeve height is more sensitive to the temperature change. The influence of base thickness is not obvious. It is proposed to decrease the base thickness and increase the sleeve height and sleeve thickness as possible at the permit of structure and weight of the spacecraft.

Key words: individual , pressure , vessel,  , NiH₂ , battery , group,  , mathematical , and , physical , models,  , temperature , field,  , geometric , parameter