A forced convection power battery cooling device

Abstract

A forced convection power battery heat dissipation device. Several cylindrical batteries are arranged at intervals in the battery pack box with the opening upward. At least one thermal diffusion plate is arranged in the battery pack box between the top and bottom of the battery. The thermal diffusion plate is tightly connected by the sleeve. The jacket is placed on the battery; the space of the battery pack box under the thermal diffusion plate is filled with a heat-absorbing and heat-conducting material layer, and above the thermal diffusion plate, the side walls on both sides corresponding to the opposite sides of the battery pack box are respectively provided with air inlets and exhaust outlets. And / or a fan is arranged on the exhaust port; or, there is a gap between the thermal diffusion plate and the side wall of the battery pack box, and air inlets and exhaust ports are respectively set up on the opposite side walls of the battery pack box, and the air inlet and / or A fan is arranged on the exhaust outlet, and the ventilation holes are opened or not opened on the heat dissipation plate. The device can be used not only for active air-cooled heat exchange, but also for passive heat dissipation filled with phase change materials. The heat dissipation effect is good, the temperature distribution is more uniform, the shape is compact, and the structure is simple, and it is suitable for power battery systems.

Description

technical field [0001] The invention relates to the technical field of power battery cooling, in particular to a forced convection power battery cooling device. Background technique [0002] Power batteries such as lithium-ion batteries have high energy density, small size, and long cycle life. They have great potential for application in electric passenger cars and commercial vehicles. However, since the temperature rise of the lithium-ion battery during charging and discharging affects its performance and cycle life, too high temperature may even cause thermal runaway, resulting in accidents such as spontaneous combustion and explosion. The temperature of the conventional lithium cobaltate cathode material battery needs to be controlled at 50 degrees Celsius. Within, to avoid thermal runaway and fire explosion, improve safety. With the advancement of battery materials and processes, although the operating temperature of batteries using lithium iron phosphate as the positi...

AI Technical Summary

Problems solved by technology

The heat dissipation fins of this patent are prepared by extrusion process, which is relatively complex and time-consuming, and the heat dissipation fins produced are too heavy and bulky, so they cannot be used in power plants that require high weight and volume, such as automobiles. battery system

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