A temperature control device for aviation dynamic lithium ion battery

Abstract

The present invention provides a temperature control device of spaceflight power lithium ion battery, relating to lithium ion battery. The device resolves the problems that the adding material is difficult to keep uniform distribution in the phase change material under the conditions of drastic concussion, 10 times higher acceleration of gravity, space radiation, rotating around the heavenly body in a high speed when adding graphite and metal powder or chipping to reduce the battery set temperature, especially when the spacecraft is emitted, such as the settlement, clustering phenomena of the adding material play an important role in thermal conductivity, so as to shorten the life service of battery. The diathermal wire of the invention is mounted in the phase change material in longitudinal and transverse cross, the end of the diathermal wire is fixed in the inside wall of the casing or the outside wall of the single battery. The diathermal wire of the invention is provided in the phase change material lengthwise and widthwise under the condition of considering the gravimetric factor, capable of quickly transmitting heat, effectively reducing the temperature of the battery, reducing temperature difference between each single battery.

Description

technical field [0001] The invention relates to a battery temperature control device. Background technique [0002] Lithium-ion batteries have the advantages of large specific energy, high voltage, light weight, small size, no memory effect, wide operating temperature range, low self-discharge rate and long storage life, and are favored by people. The series-parallel connection of lithium-ion batteries has been used as a power source in electronic products, electric bicycles, electric vehicles and aerospace fields. In recent years, some companies and government military departments at home and abroad have invested huge sums of money in the research of aerospace power lithium-ion batteries and battery packs. The stability and safety of lithium-ion batteries are worse than other batteries, which requires that they be equipped with a battery management system that monitors battery work during use, and thermal management is an important part of the battery management system. T...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: there is the possibility of liquid leakage; the weight is relatively large; repair and maintenance are complicated; components such as water jackets and heat exchangers are required, and the structure is relatively complicated

Patent 200510073005.8 uses phase change materials to control the temperature of the battery, but the thermal conductivity of general phase change materials is not ideal, the heat generated by the battery cannot be transferred in time, and the temperature distribution in the battery pack cannot be optimal

There are relevant literatures that use the method of adding graphite, metal powder or shavings to the phase change material to improve the thermal conductivity. The application of this method in the aerospace field is potentially dangerous, especially when the spacecraft is launched. Violence, up to 10 Under the influence of multi-fold acceleration of gravity, space radiation, and high-speed rotation around the planet, it is difficult to ensure uniform distribution of additives, such as precipitation and aggregation of additives, which affect the consistency of thermal conductivity

There are also reports in the literature that stone mills or metals (mainly aluminum) are made into porous structures as the matrix, and then phase change materials are added in the gaps to achieve heat absorption and rapid heat transfer, but the overall quality is relatively heavy. Applications in are constrained

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