Electric vehicle and power battery assembly radiation system thereof

Abstract

The invention provides a power battery assembly radiation system, which comprises a box body, a mounting bracket, a main air duct, an air outlet pipe, a fan and an exhaust pipe, wherein the bottom of the box body is provided with air inlet grids; parallel power battery packs are arranged in the box body; the top of the box body is provided with an upper cover; gaps between every two single power batteries in the power battery packs serve as air inlet passages which are communicated with air inlets of the air inlet grids; the mounting bracket supports the box body; an inlet of the main air duct is positioned at the top of the box body; the main air duct is communicated with the air inlet passages; the air outlet pipe is connected with an outlet of the main air duct; the fan is connected with the air outlet pipe; and the exhaust pipe is connected with the fan. In the power battery assembly radiation system, the gaps between every two single power batteries in the battery packs form the air inlet passages, and the mounting bracket, the air inlet grids, the main air duct, the air outlet pipe, the fan, the exhaust pipe and the upper cover realize cooling without an additional air duct, so that the problem that the parallel radiation system is limited by the arrangement space of the whole vehicle is solved, and the cooling efficiency of the parallel radiation system is improved. The invention also provides the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of application of power batteries for electric vehicles, and more specifically relates to a heat dissipation system for electric vehicles and power battery assemblies thereof. Background technique [0002] The power battery is the core component of an electric vehicle, and its performance directly affects the performance of the entire electric vehicle. Lithium-ion batteries are emerging batteries in the 1990s. They have the advantages of small size, high specific energy and specific power, high voltage, long life, and environmental protection and pollution-free. However, lithium-ion batteries are sensitive to temperature, and they exhibit different charge and discharge curve characteristics (capacity, internal resistance, power, etc.) at different temperatures. The temperature difference between the power battery cells in the same power battery assembly leads to battery The consistency is poor, which eventu...

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Problems solved by technology

[0008] In view of this, the present invention provides a power battery assembly heat dissipation system, which solves the problem that the parallel heat dissipation system is limited by the layout space of the vehicle, and further improves the cooling efficiency of the parallel heat dissipation system

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