Phase-change material/air-coupled hierarchical battery heat management system

Abstract

The invention provides a phase-change material / air-coupled hierarchical battery heat management system, and belongs to a battery heat management technology. The management system mainly comprises a base, a cover, outer fins, inner fins, an upper phase-change material box, a middle phase-change material box and a lower phase-change material box; multiple phase-change material boxes filled with different phase-change materials are arranged between batteries respectively; multiple rows of outer fins with different densities and lengths are distributed on two front and back side surfaces of each phase-change material box at intervals; multiple rows of inner fins are arranged on an internal side plate of each phase-change material box at intervals; and the densities of the inner fins far away from poles of the batteries are higher than those close to the poles of the batteries. Heat generated by the batteries is efficiently taken away by organically coupling two heat management technologies of phase-change material cooling and air cooling; the temperature differences in single batteries / between the batteries are effectively reduced by adopting hierarchical arrangement of the phase-change materials and the fins; and the temperature uniformity of the single batteries / battery packs is improved. The phase-change material / air-coupled hierarchical battery heat management system is obvious in temperature control and temperature equalization effects, compact in structure and convenient to install and maintain.

Description

technical field [0001] The invention relates to a battery thermal management technology, in particular to a phase-change material / air coupled hierarchical battery thermal management technology. Background technique [0002] As an energy storage element with high energy density and power density, batteries are widely used in electric vehicle power sources. However, during the charging and discharging process, the electrochemical reaction inside the battery generates a lot of heat. Locally accumulated heat will cause the battery to overheat and enter a thermal runaway state, causing the battery to spontaneously ignite or even explode, seriously endangering personnel safety. At the same time, the electrochemical reaction near the battery pole is relatively violent, which makes the battery temperature uneven and greatly reduces the cycle life of the battery. In order to ensure the operational safety of the battery, prolong the battery cycle life, improve the overall performanc...

AI Technical Summary

Problems solved by technology

However, due to the improvement of the heat transfer performance of the thermal management system, the difference in heat production of the battery is amplified, which makes the local temperature difference of the battery larger, which makes it difficult to meet the needs of battery recycling and increases the operating cost of electric vehicles.

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