Battery thermal management system based on gravity assisted heat pipe cooling and control method

Abstract

The invention discloses a battery thermal management system based on gravity assisted heat pipe cooling and a control method. The battery thermal management system comprises a battery module; a controller assembly which comprises a system controller and a sensor assembly arranged on the battery module, wherein the sensor assembly is connected to the signal input end of the system controller; a cooling pipeline assembly which comprises a gravity heat pipe assembly arranged on the battery module, a plurality of flow valves arranged on the gravity heat pipe assembly, a circulating water pump arranged at the same end of the plurality of flow valves; and a liquid cooling heat dissipation assembly arranged on the circulating water pump. The gravity assisted heat pipe assembly, the plurality of flow valves, the circulating water pump and the liquid cooling heat dissipation assembly are all provided with liquid cooling pipelines and are sequentially communicated to form a liquid cooling loop. The gravity assisted heat pipe is adopted for cooling, efficiency is high, heat dissipation is uniform, and temperature difference is not prone to being caused. The optimal working temperature range of the batteries can be kept, so that the temperature difference between the battery packs is lower than a threshold value, and the service life consistency and the service life of the batteries are ensured.

Description

technical field [0001] The invention relates to the technical field of battery thermal management, in particular to a battery thermal management system and control method based on gravity heat pipe cooling. Background technique [0002] With the development of battery technology, new energy vehicles have more stringent requirements on the charging and discharging power of the battery system and the operating environment. High-power charging and discharging will cause the temperature of the battery to rise. If it is not effectively controlled, it will lead to thermal runaway and fire in severe cases. Therefore, it is particularly important to design a reasonable and effective thermal management system for the battery pack. [0003] Theoretically, the operating temperature range of lithium batteries is -30°C to 60°C, but actual tests show that the discharge capacity of lithium batteries is low under low temperature conditions, which cannot meet the needs of automobile driving...

AI Technical Summary

Problems solved by technology

Lithium batteries working in high temperature environment for a long time will lead to high temperature rise of the battery, which will lead to thermal runaway of the lithium battery; and the temperature difference between the battery cells will become larger, resulting in inconsistent service life of the battery and affecting the mileage of electric vehicles

Images