A cooling device for electric vehicle controllers fixed by shrapnel

Abstract

The invention relates to the technical field of electric vehicle parts, particularly an electric vehicle controller heat dissipation device fixed by an elastic sheet. A heat dissipation seat of the heat dissipation device is provided with a long strip-shaped elastic sheet; a fixed edge of the long strip-shaped elastic sheet is fixed on the upper top surface of a hollow cavity through a connecting piece; the long strip-shaped elastic sheet is provided with a downward elastically pressing edge; the elastically pressing edge elastically abuts against power switch tubes arranged in rows at the inner side of the fixed edge, and therefore, the power switch tubes can abut against a mounting plane of the hollow cavity, and aluminum strips are not required to be mounted, and the power switch tubes are not required to be mounted one by one.; and thus, the electric vehicle controller heat dissipation device fixed by the elastic sheet is advantageous in convenient installation, simplification of production process and reduction of production cost; bolts are not required to pass through the power switch tubes, and therefore, the problem of incapability of fully satisfying a requirement of high-voltage resistant insulation resistance caused by close creepage distance between the bolts and the power switch tubes of a heat dissipation seat of a traditional heat dissipation device can be avoided; and the heat dissipation path of the heat dissipation seat is shorter than that of the traditional heat dissipation seat, such that, heat energy can be dissipated faster, and therefore, overheating damage rate of the heat dissipation seat is greatly reduced, and the service life of the heat dissipation seat can be prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicle accessories, in particular to a cooling device for a controller of an electric vehicle with a fixed shrapnel. Background technique [0002] China used to be a big country of bicycles. With the improvement of people's living standards, the promotion of clean energy and the enhancement of environmental protection awareness, electric vehicles are becoming more and more popular. The electric vehicle industry has achieved rapid development in the Chinese market for several years. . Electric vehicle controller is one of the four major components of electric vehicles, and its quality and performance guarantee plays an important role in the development of electric vehicles. [0003] In electric vehicle controllers, the power switch tube (MOS tube) has the characteristics of small size, large heat generation, and high heat density. Most controllers are equipped with heat sinks to dissipate the hi...

AI Technical Summary

Problems solved by technology

Therefore, there are the following disadvantages: 1. When the power switch tube is locked on the aluminum bar, the same number of bolts as the power switch tube is required, and the controller is divided into 6 tubes, 9 tubes, 12 tubes, and 15 tubes according to the number of power switch tubes. , 18 tubes or even more, the installation of too many bolts not only takes time and is inconvenient to install, but also increases the manufacturing cost accordingly; 2. The bolts connected to the power switch tube must pass through the heat dissipation part of the power switch tube, The creepage distance between them is limited, which cannot meet the requirements of high-voltage insulation resistance; 3. The heat dissipation path is the power switch tube-aluminum bar-mounting seat, resulting in a long heat dissipation path, increased thermal resistance, and power switch tubes. The heat cannot be dissipated quickly. When the ambient temperature is high and the working conditions are harsh, the power switch tube will be thermally damaged due to the inability to dissipate heat in time, resulting in the failure of the vehicle to operate normally.

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