Power battery pack dissipation device for hybrid electric vehicle

Abstract

The invention relates to a power battery pack dissipation device for a hybrid electric vehicle and aims to overcome the defects that the position arrangement of the air inlet and the air outlet of the existing battery pack dissipation device is not reasonable, which causes that the lengths of air channels in the battery pack are not consistent, the deviation between the wind pressure and the flow rate is caused, the dissipation effect of the battery pack is not consistent, the temperature field part is not uniform, and the service life and the performance of the battery pack are influenced. The battery pack is placed in the space with air inlet windows; the volume of the space is greater than the size of the battery pack; the air inlets are directly communicated with the space; the number of the air inlets is the same as that of support frames in the battery pack, and the positions of the air inlets correspond to those of the support frames; a battery module in the battery pack is partitioned off into equant units; the area of each air inlet corresponding to each unit is the same; the air inlets are opposite to the air outlets, and the air inlets correspond to the support frames, so that the cooling air in the air inlets descends along the support frames and does not cause eddies at the support frames, the lengths in air channels of the battery pack are consistent, the temperature field in the battery pack keeps uniform, and the situation that the dissipation effect in the battery pack is the same is ensured.

Description

technical field [0001] The invention relates to a battery pack structure, in particular to a battery pack cooling device for a hybrid electric vehicle which keeps the battery pack in an optimum temperature range during operation. Background technique [0002] As the main energy storage element of a hybrid vehicle, the battery pack is a pipe component of a hybrid vehicle, and its performance and service life will affect the performance of the vehicle. The vehicle battery pack is composed of multiple battery cells connected in series to form a module, and then the battery pack is formed. The loading space on the vehicle is limited, and the number of batteries required by the vehicle is large, and the batteries are closely arranged and connected. When the vehicle is running under different driving conditions such as high speed, low speed, acceleration, deceleration, etc., the battery will be discharged at different rates, and a large amount of heat will be generated at differen...

AI Technical Summary

Problems solved by technology

[0005] The invention solves the unreasonable layout of the air inlet and air outlet of the existing battery pack cooling device, resulting in inconsistent lengths of air ducts inside the battery pack, causing deviations in wind pressure and flow velocity, resulting in inconsistent heat dissipation effects of the battery pack, and partial temperature field Inhomogeneity, the defect that affects the service life and performance of the battery pack, provides a power battery pack cooling device for hybrid electric vehicles, redesigns the positions of the air inlet and the air outlet, and adjusts the relative position and size of the air inlet and the air outlet, so that the The length of the air duct inside the battery pack is consistent, and the temperature field inside the battery pack remains uniform, ensuring the same heat dissipation effect inside the battery pack

[0006] The present invention also solves the problem that the air inlet of the existing battery pack cooling device is set directly above the battery pack, causing the cooling wind to form eddy currents at the support frame inside the battery pack, affecting the heat dissipation effect of the battery pack, and causing the battery pack to vibrate and affect the cooling effect of the battery pack. The service life of the battery pack is limited, and a power battery pack cooling device for hybrid electric vehicles is provided. The position of the air inlet relative to the support frame and the position of the air outlet are reasonably designed to reduce the eddy current generated by the cooling air at the support frame and ensure that the battery pack cooling effect

[0007] The present invention also solves the defects of complicated structure and high design cost of the air intake duct of the existing battery pack cooling device, provides a power battery pack cooling device for hybrid electric vehicles, changes the installation position of the battery pack cooling device, and simplifies the air intake duct , reduce design cost

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