Power module shell and power module with same

Abstract

The invention provides a power module shell and a power module with the same. The power module shell comprises a shell frame and a shell surface; a plurality of mounting columns are arranged at the top of the shell frame, and the bottom part is provided with a positioning groove; the shell surface comprises a panel and a mounting part which are integrally formed through injection molding; a needleoutlet hole is formed in the panel and penetrates through the top surface and the bottom surface of the panel; a plurality of fixing rings are further arranged on the peripheral edge of the panel, the outer shell face is arranged on the installation column in a sleeving mode through the fixing rings, the outer shell is fixed to the PCB through the installation column, and the outer shell is fixedto the radiator through the fixing part. Compared with the prior art, the power module shell provided by the invention is advantageous in that the shell adopts the scheme that the shell frame and theshell panel are separated from each other, so that the stress of the power module shell can be reduced, and the vibration resistance of the shell can be improved; the shell frame and the shell surface are both made of plastics, so that the large stress of metal parts on the shell is eliminated, the shell wall is prevented from being pulled and cracked, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of power modules, in particular to a power module shell and a power module having the same. Background technique [0002] Various shells are used in the power module. The shell has the functions of protecting the module, supporting structure, and installing and fixing the radiator. A good shell needs to be as low in cost as possible, and has good shock resistance and strength. It is the guarantee of the integrity of the power module. figure 1 It is an existing power module casing, its installation part includes metal mounting ears made of metal materials, and the casing frame is made of plastic. In order to achieve good vibration resistance, the metal material has high strength and toughness, and the cost is relatively high . In addition, the metal and plastic frames need to be inlaid and injection molded. The metal parts have greater stress on the shell, and sometimes the shell wall will be pulled apart. ...

AI Technical Summary

Problems solved by technology

figure 1 It is an existing power module casing, its installation part includes metal mounting ears made of metal materials, and the casing frame is made of plastic. In order to achieve good vibration resistance, the metal material has high strength and toughness, and the cost is relatively high

In addition, the metal and plastic frames need to be inlaid and injected. The metal parts have greater stress on the shell, and sometimes the shell wall will be pulled apart.

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