Fixing structure of controller MOS transistors, controller and electric vehicle

Abstract

The invention discloses a fixing structure of controller MOS transistors, a controller and an electric vehicle. The arrangement number of MOS transistors is two rows or more, the fixing structure of the controller MOS transistors includes a heat radiation pedestal, silica gel strips and heat radiation installation parts, heat radiation walls extend from the heat radiation pedestal, the number of the heat radiation walls is equal to the arrangement number of the MOS transistors, and each heat radiation wall and one side of each row of MOS transistors are in corresponding insulated contact connection; and the other side of each row of MOS transistors is in contact connection with the silica gel strip, and the silica gel strips are fixed on the heat radiation walls through the heat radiationinstallation parts. The fixing structure provided by the invention is stable and effective, a heat radiation path is rapid, adopted fixing part processing and installation processes are very simple, the production cost is low, the production efficiency is high, and the fixing structure can meet the requirement of fixing of a controller having a plurality of rows of MOS transistors, and is very suitable for batch production application.

Description

Technical field [0001] The present invention belongs to the field of controllers, and specifically relates to a fixed structure of a controller MOS tube. The present invention also relates to a controller and an electric vehicle for the fixed structure application of the MOS tube of the controller. The present invention is particularly suitable for high-power electric vehicles. The control area of ​​the car. Background technique [0002] Because the MOS tube of the controller inevitably needs to generate heat during the working process, it is necessary to conduct the heat to the outside in a timely and rapid manner through the heat dissipation structure. Otherwise, it will affect the function of the relevant electronic components of the controller, and even cause the MOS tube of the controller. And other related electronic components will be burned, and eventually the controller will not work. Therefore, the heat dissipation performance of the controller is directly related to t...

AI Technical Summary

Problems solved by technology

These improved technologies all use MOS tubes to be vertically fixed on the circuit board, so that the heat dissipation surface of the MOS tube is on the side of the heat dissipation shell, and the heat dissipation area is small. Limiting bosses and arc-shaped bosses are set in the housing and around the MOS tube. The setting of the limiting boss and arc-shaped bosses further compresses the heat dissipation space of the MOS tube, resulting in very limited heat dissipation effects of these improved technologies. Moreover, the processing and installation process of the heat dissipation shell is also relatively cumbersome. At the same time, this type of heat dissipation fixed structure is not suitable for the heat dissipation of the MOS tubes of the high-power controller. Even three rows and other multi-row structures

[0004] The prior art closest to the present invention is that the authorized announcement number is CN205454350U, which discloses a high-power electric vehicle controller MOS tube fixing structure, which includes a circuit board, and two rows of MOS tubes are arranged at intervals on the circuit board. The two rows of MOS tubes are provided with a heat conduction section on the circuit board, wherein the heat conduction section includes a heat conduction plate connected to the heat dissipation housing of the high-power electric vehicle controller, and at least one side of the heat conduction plate is extended for Install the mounting plate of the two rows of MOS tubes, the two rows of MOS tubes are installed on both sides of the mounting plate by spring sheets, and the two rows of MOS tubes and the outer wall of the mounting plate are provided with Insulation film; the spring piece used in this technology is used as a fixing part. The fixing process is cumbersome, and the spring piece is a special-shaped part, and the processing yield is low, resulting in a high cost of the fixing structure. In addition, the fixing structure also receives MOS tubes. The number of rows is limited, and it can only be used to fix MOS tubes with a quantity of 2 rows

Images