Thermal management method and device for battery pack

Abstract

The invention relates to a thermal management technology for power batteries, and belongs to the field of power batteries. A thermal management method for a battery pack is characterized in that a heat-conducting sleeve coating one battery is arranged outside one battery cell of the battery pack; each heat-conducting sleeve is connected with a heat-conducting pipe with a heat transfer function; and heat exchange is achieved for the batteries of the battery pack through heat transmission of the heat-conducting pipe. A device for thermal management employing the thermal management method for the battery pack is characterized by comprising the heat-conducting pipes and the heat-conducting sleeves, wherein each heat-conducting sleeve is fixedly connected with the corresponding heat-conducting pipe; each heat-conducting sleeve coats the outside of each battery cell of the battery pack; the internal sizes of the heat-conducting sleeves are matched with the external sizes of the batteries; the outer side of each heat-conducting sleeve is fixedly connected to the corresponding heat-conducting pipe; the heat-conducting pipes transmit the heat generated by the batteries through heat transmission; and heat exchange is achieved for the batteries of the battery pack. According to the thermal management method and device, the temperature adjusting effect is improved; the mechanical properties of the batteries and the thermal management device are strengthened; and the device is portable and easy to assemble.

Description

technical field [0001] The invention relates to the technical field of thermal management of automobile power batteries, in particular to a method and device for thermal management of a battery pack. Background technique [0002] Power batteries such as lithium-ion batteries have high energy density, small size, and long cycle life. They have great application potential and market 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 batter...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a battery pack thermal management method and device to solve the defects of insufficient heat dissipation capacity of the current thermal management device, which is not conducive to heat transfer, resulting in high temperature rise and large temperature difference of the battery

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