Cell module with heat-radiation capability

Abstract

A provided excellent cell module with heat-radiation capability comprises a plurality of cell units and a cell box accommodating the cell units; the cell box is filled with a phase-change material; the cell box is provided with an outlet and an inlet of the phase-change material; the exterior of the cell box is provided with a circulation pipe, and the circulation pipe connects the outlet and the inlet of the phase-change material for forming an enclosed system; and the employed phase-change material is an insulative flame-retardation electrolysis-resistant thermolysis-resistant phase-change material. By employing the technical scheme, without changing the arraying state and the electrical structure of the cell unit, the heat-radiation demands of the cell module can be completely satisfied under the premise of relatively high energy density.

Description

technical field [0001] The invention relates to a battery module, in particular to a battery module with heat dissipation capability. Background technique [0002] During the high-current charging and discharging process of the power battery, a large amount of heat will accumulate inside the battery. If the heat is not removed in time, the temperature of the battery pack will rise sharply. Especially for a large-capacity battery pack, the heat release is usually higher and due to the need to meet the energy density It is easier to accumulate heat, which will lead to thermal runaway, which will further cause the battery to release gas, smoke, and liquid leakage, and may even cause the battery to burn. Therefore, the temperature management of the power battery is particularly important; while the traditional air-cooled and liquid-cooled The structure has poor heat dissipation effect on battery packs with high energy density and huge heat generation. Patent No. CN201110135031 d...

AI Technical Summary

Problems solved by technology

[0002] During the high-current charging and discharging process of the power battery, a large amount of heat will accumulate inside the battery. If the heat is not removed in time, the temperature of the battery pack will rise sharply. Especially for a large-capacity battery pack, the heat release is usually higher and due to the need to meet the energy density It is easier to accumulate heat, which will lead to thermal runaway, which will further cause the battery to release gas, smoke, and liquid leakage, and may even cause the battery to burn. Therefore, the temperature management of the power battery is particularly important; while the traditional air-cooled and liquid-cooled The structure has a poor heat dissipation effect on battery packs with high energy density and huge heat generation. Patent No. CN201110135031 discloses a heat dissipation system that combines phase change materials and heat pipes

[0003] The technical solution of this patent is: phase change materials are filled in the gaps between the single cells, the adjacent single cells are in close contact, heat pipes are inserted in the gaps between the adjacent single cells, and An external heat pipe is also arranged around the body, and both the external heat pipe and the internal heat pipe have an evaporation end installed in the shell and a condensation end arranged outside the shell, and are in contact with the phase change material; this patent only uses the phase change material as a heat transfer medium, and its In essence, there is no essential difference from ordinary heat-conducting coolants. The essence is to bring the heat of the battery unit into the phase change material, and then take the heat away from the battery pack through other heat dissipation methods. This structure cannot fully utilize the phase change. The heat dissipation ability of the material cannot solve the heat dissipation problem of the large power battery pack

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