Pin type power single tube integration scheme applied to electric control product of electric vehicle

Abstract

The invention discloses a pin type power single tube integration scheme applied to an electric control product of an electric vehicle, and relates to the technical field of a new energy vehicle. The pin type power single tube integration scheme comprises the following steps of firstly, pressing a pin type power device on a metal support plate by a press sheet or a press strip, wherein an insulation heat conduction gasket is arranged between the power device and the metal support plate; secondly, welding a pin of the power single tube and a bus capacitor on a thick copper printed circuit board (PCB); and finally, pressing the metal support plate integrated with the thick copper PCB on a cooling cold plate, wherein heat conduction silicon grease is coated between the metal support plate and the cooling cold plate. Compared with a package type power module, the cost is low, the design flexibility is greatly improved, the selective soldering or wave soldering feasibility of a power single tube pin is greatly improved, the power single tube is light in weight, the heat capacity of a product is low, and the welding quality is high; and the heat of the power single tube can be transversely diffused to the metal support plate, the cooling area is effectively extended, and the thermal resistance of the system is reduced.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a pin-type power single-tube integration scheme applied to electronic control products of electric vehicles. Background technique [0002] In the prior art, the pin-type power single-tube integration solutions applied to electric vehicle electronic control products include: 1. Use the packaged power module to connect with the bus capacitor to form the main circuit. The disadvantage is that the price of the packaged power module is high and the deformation design is difficult. ;2. After crimping the pin-type power single tube to the heat dissipation cold plate, insert the pin into the electrical hole of the PCB board, fix the PCB board to the heat dissipation cold plate with screws, and perform selective soldering on the pin when the power single tube is blocked. , to realize the electrical connection with the PCB board, the disadvantage is that the selection welding f...

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Problems solved by technology

[0002] In the prior art, the pin-type power single-tube integration solutions applied to electric vehicle electronic control products include: 1. Use the packaged power module to connect with the bus capacitor to form the main circuit. The disadvantage is that the price of the packaged power module is high and the deformation design is difficult. ;2. After crimping the pin-type power single tube to the heat dissipation cold plate, insert the pin into the electrical hole of the PCB board, fix the PCB board to the heat dissipation cold plate with screws, and perform selective soldering on the pin when the power single tube is blocked. , to realize the electrical connection with the PCB board, the disadvantage is that the selection welding failure rate is high, after the pin-type power single tube is welded, it is not easy to detect solder joints and tin beads, and after the power single tube is crimped to the heat dissipation cold plate, the pin is selected Welding, there is a problem that the selective welding equipment is difficult to bear the weight of the product, the heat capacity of the product is too large, and the welding is serious; 3. Press the pin-type power single tube to the metal plate tooling, and carry out the stitching under the condition that the power single tube is blocked. Select welding, remove the metal plate tooling, and crimp the PCB board with a large number of power single tubes to the heat dissipation cold plate. The disadvantage is that the power single tube has two bends, which will damage the pins. After welding, the power single tube and the The relative position of the PCB board is fixed, it is difficult to buffer the flatness tolerance of the contact surface of the heat dissipation cold plate, and there is a risk of poor heat dissipation; 4. Without using the PCB board, the power single tube is welded to the copper bar, and the copper bar is connected to the bus capacitor through the copper bar. Disadvantages The process is complex and the parasitic inductance is large

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