Battery system and its temperature control method adapted to polar ultra-low temperature environment

Abstract

The invention provides a battery system and a temperature control method suitable for polar ultra-low temperature environment. The battery system includes: a shell with an inner tank and an outer tank and a battery pack installed inside the inner tank, a vacuum insulation layer is formed between the inner tank and the outer tank, and a heating device is arranged on the inner tank wall, and the heating device The inner tank is heated in a controlled manner, and the temperature control method includes: using the heat balance model of the battery pack to predict the future temperature; inputting the future temperature into the evaluation function of the temperature control system; using the gradient descent method to solve the evaluation function to obtain the optimal control Quantity sequence; take the first sequence value in the optimal control quantity sequence as the actual control quantity of the heating device, and control the heating device for heating according to the actual control quantity. The method of the invention reduces temperature fluctuations, has good temperature control precision and consumes less electric energy.

Description

technical field [0001] The invention relates to a battery system, in particular to a battery system and a temperature control method for the polar ultra-low temperature environment. Background technique [0002] The effective operating temperature range of the battery is -30ºC~60ºC, figure 1 is the discharge curve of the battery at different temperatures in the prior art, such as figure 1 As shown, L1-L6 are the decay curves of the battery voltage over time at 25°C, 0°C, -10°C, -20°C, -30°C, and -40°C respectively. It can be seen that as the temperature decreases, The battery will have problems such as increased internal resistance and fast discharge speed, which seriously affect the life of the battery pack. [0003] Due to its unique geographical location and environment, the weather in the polar regions is directly related to major issues such as global climate, ecological environment and the future of mankind. Therefore, it is necessary to continuously monitor the met...

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Problems solved by technology

Third, the impact of the polar night environment: Since most of Antarctica is within the Antarctic Circle, and because it is in the polar night environment for 1 to 6 months every year, at this time, the solar panels that use the sun to provide energy sources cannot work, and the power supply of the weather station is only can be provided by the battery pack

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