Battery pack based on Peltier effect and heat pipe cooling and heat management method thereof

Abstract

The invention discloses a battery pack based on a Peltier effect and heat pipe cooling and a heat management method thereof. A thermoelectric cooler is disposed on the upper part of a battery module in a battery pack case. Heat conduction gaskets and heat conduction fins having high thermal conductivity and the batteries form a heat conduction path of battery module-heat conduction gaskets-heat conduction fins-heat conduction support plate and a heat conduction path of battery module-heat conduction gaskets -heat conduction fins- heat conduction support vertical plate-heat conduction support plate. Different working modes can be performed in a high-temperature environment, a low-temperature environment and a normal environment. Advantages of fast thermal response, high thermal conductivity, accurate temperature control, no noise and the like are achieved. The battery individual modules in the battery module are increased in heat transfer coefficients when uniformly heated, thereby further ensuring the stability, reliability and high efficiency of the battery operation. The battery pack is compact in overall structure and small in size, and provides a space for the structural arrangement of the whole vehicle.

Description

technical field [0001] The invention belongs to the field of power lithium batteries for vehicles, and in particular relates to a battery module based on Peltier effect and heat pipe cooling and a heat management method thereof. Background technique [0002] Power lithium-ion batteries have high energy density, small size, and long cycle life, and have great potential for application in electric passenger cars and commercial vehicles. However, due to the temperature rise of lithium-ion batteries during charging and discharging, which affects their performance and cycle life, excessive temperature may even cause thermal runaway, resulting in accidents such as spontaneous combustion and explosion. The temperature of conventional lithium cobalt oxide cathode materials is required 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...

AI Technical Summary

Problems solved by technology

[0003] The power lithium-ion battery cooling system usually adopts air cooling or liquid cooling to cool the battery. The conventional air cooling cooling system has a simple structure, but the cooling effect is limited, and the battery temperature uniformity is poor.

The liquid cooling method has high heat transfer efficiency, but its cooling capacity is limited by the ambient temperature. In hot weather, the temperature of the cooling water can reach above 40°C, which prevents the battery from dissipating heat.

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