Preparation and bidirectional heat flow control method of battery heat management device coupled with novel bionic heat pipe

Abstract

The invention provides a composite battery thermal management device prepared by applying the super-hydrophilic characteristic of a novel bionic plant and a bidirectional heat flow control method of the composite battery thermal management device. A bionic heat pipe set and a battery are subjected to solid-solid contact heat exchange, and the bionic heat pipe set is in direct contact with the bottom cold / hot plate at the bottom, so that heat transfer between a battery and the bottom cold / hot plate is realized. When the battery is converted from the cooling working condition to the preheating working condition, the cold and hot ends of the bionic heat pipe set perform self-adaptive conversion of the heat transfer direction along with the state change of the bottom cold / hot plate. The problem that thermodynamic circulation and cold and hot end self-adaptive adjustment cannot be achieved in the heat pipe due to the fact that liquid at the cold end of an existing gravity type heat pipe cannot rise to the hot end by means of capillary force under the influence of gravity is solved; the efficient cooling capacity of the battery pack in a high-temperature environment and a severe workingcondition and the rapid preheating capacity of the battery pack in a cold low-temperature environment are greatly improved, and the optimal working temperature, power output, cycle life and thermal safety of the electric vehicle battery pack are guaranteed.

Description

technical field [0001] The invention belongs to the field of thermal management of electric vehicle power batteries, and in particular relates to a power battery high-efficiency heat exchange device and a thermal management control method. Background technique [0002] With the rapid development of electric vehicles, the specific energy of electric vehicles' batteries is gradually increasing. At the same time, the high temperature climate and harsh working conditions also make the heat production of batteries increase rapidly. In addition, some safety issues caused by insufficient cooling capacity of the battery have also received widespread attention, so the corresponding battery thermal management technology urgently needs to be improved and improved. Reasonable thermal management of power batteries is not only a basic condition for normal driving, but also a necessary guarantee for the safety of passengers. In the past battery heat exchange, liquid cooling is the most co...

AI Technical Summary

Problems solved by technology

The method of the invention overcomes the fact that the liquid at the cold end of the gravity-type heat pipe cannot rely on capillary force to rise to the hot end due to the influence of gravity in the past, which leads to the inability to realize the thermal cycle and self-adaptive adjustment of the cold and hot ends inside the heat pipe, and greatly improves the high-temperature environment and harsh working conditions of the battery pack. High-efficiency cooling in cold and low-temperature environments and rapid preheating capabilities in cold and low-temperature environments ensure the best operating temperature, power output, cycle life and thermal safety of electric vehicle battery packs

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