A dual-interval autonomous temperature control method for on-board batteries

Abstract

The invention relates to a satellite-borne storage battery dual-interval autonomous temperature control method. According to the method, under the premise of a permitted automatic temperature control function of a satellite storage battery, when actual storage battery discharge current is smaller than a set discharge current alarm threshold or solar battery array current is greater than a set matrix current alarm threshold value, the storage battery temperature control work is in a first interval mode; and when the actual storage battery discharge current is greater than the set discharge current alarm threshold value and the solar battery array current is smaller than the set matrix current alarm threshold value, the storage battery temperature control work is in a second interval mode. Control management can be performed on the storage battery temperature both in the first interval temperature control mode and in the second interval temperature control mode. The method provided by the invention changes the current situation of only adopting single interval control in satellite storage battery temperature control, and matches the battery discharge current and the solar battery array current with storage battery temperature change, thus enhancing the accuracy and flexibility of satellite storage battery temperature control, and improving the autonomous temperature control management quality of the storage battery.

Description

technical field [0001] The invention relates to a temperature control method of a satellite accumulator. Background technique [0002] The satellite power supply subsystem includes three parts: solar cell array, battery pack and power controller, such as figure 1 shown. Battery packs and solar arrays provide satellites with power during shadow periods and peak periods of power consumption. During the shadow period, the battery pack discharges to supply power for the whole star. During the light period, the solar array not only meets the load priority power supply, but also charges the battery pack with the remaining energy. The life of the on-board battery pack is closely related to the temperature index. A large number of test data show that the life of the on-board battery is exponentially related to its temperature. At the same depth of discharge, the life of the battery pack decreases as its temperature rises. When the battery pack is discharged, a large amount of h...

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the large heat capacity of the battery, the rise of the battery surface temperature lags behind. In the past, the single-range temperature control method often waited until the battery surface temperature rose to a certain value before controlling it. The control lags behind and the temperature control criterion is single, which cannot be timely. Effectively realize the temperature control of the battery pack; (2) The temperature control range of the battery pack is limited to the battery pack itself, and the problem is not considered at the level of the power subsystem, ignoring the relationship between other equipment in the subsystem and the temperature control of the battery (3) In the process of temperature control, it is necessary to rely on the injection data block downloaded from the satellite host to open or close the temperature control loop, and the control efficiency and accuracy need to be improved urgently

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