Battery pack air-cooled heat pipe composite heat dissipation structure

Abstract

The invention discloses a battery pack air-cooled heat pipe composite heat dissipation structure which comprises a shell, an upper cover and a heat pipe module, a heat dissipation window is arranged on one side of the shell, a ventilation opening is formed in the surface of the heat dissipation window, a drainage fan is arranged on the other side of the shell, a battery cell module is arranged on the inner side of the shell, and a single-channel heat pipe is arranged on the inner side of the shell. The single-channel heat pipe is located on the side provided with the drainage fan, and the surface of the single-channel heat pipe is sleeved with fins. A large number of fins are arranged outside the arranged vertical part heat pipe in a sleeving mode, the heat dissipation area is increased, the heat exchange efficiency is improved, a drainage fan is arranged on a front panel of the battery pack, forced heat exchange is carried out, heat is rapidly brought out of the battery pack, a local heat pipe structure is adopted, an air cooling structure is used for assistance, and the two structural modes are combined; and the heat dissipation structure can meet the heat dissipation requirement of the high-rate battery cell.

Description

technical field [0001] The invention relates to the technical field of new energy battery development, in particular to a battery pack air-cooled heat pipe composite heat dissipation structure. Background technique [0002] Technologies for battery thermal management include: air cooling, liquid cooling, and solid-liquid phase change materials for temperature regulation. Air cooling includes natural air cooling and forced air cooling. For low-rate battery boxes, the heat of the battery cells is not high, so air cooling can be used. For high-rate batteries, the heat of the batteries is relatively high, and liquid cooling can be used. When the charging and discharging rate of the battery cell reaches above 2C, the cooling of the phase change material can keep the temperature of the battery cell consistent. [0003] The existing air-cooling technology has low cooling cost, and the battery has a heat transfer limit when the heat dissipation is large, resulting in a large tempe...

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Problems solved by technology

[0003] The existing air-cooling technology has low cooling cost, and the battery has a heat transfer limit when the heat dissipation is large, resulting in a large temperature difference between the internal and external cells of the module. The liquid cooling structure can improve temperature consistency, but it needs to increase the infusion power system and external Heat exchange equipment

The cooling of phase change materials also has the problem of low heat transfer efficiency. Due to their poor fluidity, the heat transfer efficiency of phase change materials is not high. When the heat absorption of phase change materials reaches the upper limit, it is necessary to increase the power system to transfer the heat out. We propose a battery pack air-cooled heat pipe composite heat dissipation structure

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