Journal
JOURNAL OF ENERGY STORAGE
Volume 56, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2022.105952
Keywords
Thermal management; Lithium -ion battery; Spacecraft; Thermoelectric cooler; Temperature uniformity
Categories
Funding
- Tianjin Institute of Power Sources
- [52-8031-01]
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Excessive temperature difference within the battery pack can reduce its energy conversion efficiency and reliability. A fuzzy-PID dual-layer coordinated control strategy based on thermoelectric coolers is proposed to address the thermal problems of the lithium-ion battery pack for space applications and improve its temperature adaptability.
Excessive temperature difference within the battery pack is an important reason for its reduced energy con-version efficiency and reliability. A fuzzy-PID dual-layer coordinated control strategy with high temperature uniformity based on thermoelectric coolers is proposed for the thermal problems of the lithium-ion battery pack for space applications. The dynamics model of the battery thermal management system is established, and the open-loop characteristics of the lithium-ion battery pack under the influence of the discharge time of the lithium -ion battery pack in an orbital cycle, the thermal-optical properties of the satellite surface, and the volume flow rate of the working medium in the cold-plate are numerically studied during the orbital operation. The control effect of the fuzzy-PID dual-layer coordinated controller is numerically evaluated, and the results show that it can maintain the average temperature of the Li-ion battery pack in the predetermined optimal temperature range of 15- 35 degrees C under complex thermal disturbances, and the maximum temperature difference does not exceed 1.7 degrees C, which is 76.7 % smaller than that without active control, and the minimum temperature difference is only 0.06 degrees C. This temperature control strategy can significantly improve the temperature adaptability of the space Li -ion battery pack and help further improve its operational performance and reliability.
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