Power module, inverter comprising same and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a power module, an inverter comprising the power module and a vehicle, and aims to solve the problems that after plastic package of the conventional power module is completed, a plastic package body is easy to deform, so that a signal pin is difficult to install, position deviation occurs after installation, and the power module is damaged. And the plugging cooperation of the signal pin and the corresponding circuit board is influenced. In order to achieve the purpose, the power module of the utility model comprises a substrate on which an electronic component is arranged; the plastic package body is arranged on the substrate in a covering manner so as to package the electronic component; the connecting component is fixed on the substrate and penetrates through the plastic package body, so that one end, far away from the substrate, of the connecting component extends out of the plastic package body; and the signal contact pin is fixed at one end, far away from the substrate, of the connecting component and can be matched with a corresponding circuit board in an inserting manner. Therefore, the signal pin of the power module has high position precision, and the accuracy in the plugging process and the stability of signal transmission are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, specifically provide a kind of power module and including the inverter of the power module, vehicle. BACKGROUND

[0002] With the continuous improvement of the electrification and intelligent level of vehicle, a large number of electronic power modules are widely used in the motor, inverter and frequency converter of vehicle to realize the transmission of control signal and power signal. The power module usually includes a substrate, electronic components and signal pins mounted on the substrate, and a plastic package covering the substrate. The plastic package can encapsulate the electronic components to form a protective structure. The signal pins are installed on the substrate through the mounting holes on the plastic package to facilitate the plug-in cooperation with the corresponding circuit module.

[0003] However, after the plastic packaging of the existing power module is completed, the signal pins are difficult to install or have position deviation after installation due to the deformation of the plastic package, which affects the plug-in cooperation of the signal pins with the corresponding module.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] The utility model aims to solve the above technical problems, i.e., the existing power module after plastic packaging is completed, the signal pins are difficult to install or have position deviation after installation due to the deformation of the plastic package, which affects the plug-in cooperation of the signal pins with the corresponding module.

[0006] In a first aspect, the utility model provides a power module, characterized in that the power module comprises: a substrate, the substrate is provided with electronic components; a plastic package, the plastic package is arranged on the substrate to encapsulate the electronic components; a connecting member, the connecting member is fixed on the substrate and penetrates the plastic package, so that one end of the connecting member away from the substrate extends outside the plastic package; a signal pin, the signal pin is fixed on one end of the connecting member away from the substrate and can be plug-in cooperated with the corresponding circuit board.

[0007] In the preferred technical solution of the above power module, one end of the connecting member away from the substrate extends a distance outside the plastic package.

[0008] In the preferred technical solution of the above power module, the substrate is further provided with a solder pad, and the connecting member is welded and fixed with the solder pad.

[0009] In the preferred technical solution of the above power module, the connecting member and the substrate are fixed by reflow soldering, and / or the signal pin and the top end of the connecting member are fixed by reflow soldering.

[0010] In the preferred technical scheme of the power module, the connecting member is provided with a limiting structure, and the limiting structure is in clamping cooperation with the plastic package body to improve the stability and sealing performance of the connection between the connecting member and the plastic package body.

[0011] In the preferred technical scheme of the power module, the connecting member is provided in a column structure, and the limiting structure is provided in an annular groove.

[0012] In the preferred technical scheme of the power module, the connecting member is made of at least one of aluminum, copper, molybdenum copper, gold and silver.

[0013] In the preferred technical scheme of the power module, the surface of the connecting member is further provided with a metal plating layer made of at least one of nickel, gold and silver.

[0014] In the second aspect, the utility model provides an inverter, the inverter includes the power module.

[0015] In the third aspect, the utility model provides a vehicle, the vehicle includes the inverter.

[0016] In the case of adopting the above technical scheme, the power module of the utility model comprises a substrate, electronic components are arranged on the substrate; a plastic package body is arranged on the substrate to encapsulate the electronic components; a connecting member is fixed on the substrate and penetrates through the plastic package body, so that one end of the connecting member away from the substrate extends to outside of the plastic package body; and a signal pin is fixed on the one end of the connecting member away from the substrate and can be plugged into cooperation with a corresponding circuit board. Through such arrangement, the signal pin can be electrically connected with the substrate through the connecting member, on the one hand, the signal pin can be electrically connected with the substrate without passing through the mounting hole on the plastic package body, so that the position tolerance of the signal pin is prevented from being changed due to deformation of the plastic package body, thereby avoiding the difficulty in installation of the signal pin and simplifying the installation process of the signal pin; on the other hand, the signal pin does not need to be in direct contact with the plastic package body after installation, so that the position tolerance of the signal pin is prevented from being changed due to thermal deformation of the plastic package body, thereby ensuring the accurate direction of the signal pin and improving the accuracy of plugging between the signal pin and the corresponding module and the stability of signal transmission.

[0017] Further, one end of the connecting member away from the substrate extends out of the plastic package body by a distance. Through such arrangement, the welding area of the signal pin is increased, the welding and fixation between the signal pin and the connecting member are facilitated, and the signal pin can be kept at a certain distance from the plastic package body after installation, so that the position tolerance of the signal pin is prevented from being affected by large deformation of the plastic package body.

[0018] Further, the substrate is further provided with a solder pad, and the connecting member is welded and fixed with the solder pad. Through the arrangement, the solder pad can provide a reliable welding surface and base for the connecting member and other electronic components, ensure the reliability of electrical and mechanical connection between the electronic components and the substrate, and help improve the stability of the power module.

[0019] Further, the connecting member and the substrate are welded and fixed by reflow soldering, and / or the top end of the signal pin and the connecting member are welded and fixed by reflow soldering. Through the arrangement, the welding precision and speed can be ensured, the welding quality is improved, and the cost is controlled.

[0020] Further, the connecting member is provided with a limiting structure, and the limiting structure is clamped and matched with the plastic package to improve the stability and sealing performance of the connection between the connecting member and the plastic package. Through the arrangement, on the one hand, the stability of the connection between the connecting member and the plastic package is improved, and the mutual fixation is achieved. On the other hand, the sealing performance between the plastic package and the connecting member is improved, the electronic components are protected from the external environment, and the service life of the electronic components is improved.

[0021] Further, the connecting member is provided with a limiting structure, and the limiting structure is clamped and matched with the plastic package to improve the stability and sealing performance of the connection between the connecting member and the plastic package. Through the arrangement, on the one hand, the stability of the connection between the connecting member and the plastic package is improved, and the mutual fixation is achieved. On the other hand, the sealing performance between the plastic package and the connecting member is improved, the electronic components are protected from the external environment, and the service life of the electronic components is improved.

[0022] Further, the connecting member is made of at least one material selected from aluminum, copper, molybdenum copper, gold and silver. Through the arrangement, the conductivity of the connecting member is ensured to realize the electrical connection between the signal pin and the substrate.

[0023] Further, the surface of the connecting member is further provided with a metal plating layer made of at least one material selected from nickel, gold and silver. Through the arrangement, while ensuring the conductivity, the oxidation resistance and corrosion resistance of the connecting member in a complex environment can be effectively improved, and the stability and service life of the power module are improved.

[0024] In addition, the inverter further provided on the basis of the above-mentioned storage device has the technical effects of the above-mentioned power module, and compared with the inverter before improvement, the inverter of the utility model can efficiently convert the input direct current signal into stable alternating current signal and output, and can adjust the frequency, amplitude and the like as required, so as to meet various power supply requirements.

[0025] Finally, the vehicle provided further based on the above-mentioned inverter has the technical effects of the above-mentioned inverter, compared with the vehicle before the improvement, the vehicle of the utility model can convert 12V direct current into 220V alternating current, thereby meeting the use demand of various electronic equipment, and greatly improving the convenience of power utilization of the driver and the passenger. BRIEF DESCRIPTION OF DRAWINGS

[0026] The preferred embodiments of the utility model will be described below in conjunction with the drawings, in which:

[0027] Figure 1 is a structural schematic view of the power module of the utility model;

[0028] Figure 2 is an assembly schematic view of the substrate, the electronic component and the connecting member of the utility model;

[0029] Figure 3 is a structural schematic view of the connecting member of the utility model.

[0030] List of reference signs:

[0031] 1, substrate; 2, electronic component; 3, plastic package; 4, connecting member; 41, limiting structure; 5, signal pin. DETAILED DESCRIPTION

[0032] The preferred embodiments of the utility model will be described below in conjunction with the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0033] It should be noted that in the description of the utility model, the terms "inner", "outer", "upper", "lower", "top", "bottom" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "setting", "connecting", "installing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] The existing power module based on the background technology is prone to deformation after plastic packaging, which leads to difficult installation of the signal pin or position deviation after installation, affecting the plug-in cooperation of the signal pin and the corresponding circuit board. The power module, the inverter and the vehicle comprising the power module are provided, which are fixedly connected with the connecting member on the substrate, so that the connecting member penetrates the plastic package body, so that the end of the connecting member away from the substrate extends to the outside of the plastic package body, and the signal pin is connected with the end of the connecting member to realize the electrical connection between the signal pin and the substrate, thereby avoiding the direct contact between the signal pin and the plastic package body, and preventing the deformation of the plastic package body from affecting the position of the signal pin.

[0036] Specifically, as shown in the drawings, the power module comprises a substrate, an electronic component is arranged on the substrate; a plastic package body, the plastic package body is arranged on the substrate to encapsulate the electronic component; a connecting member, the connecting member is fixed on the substrate and penetrates the plastic package body, so that the end of the connecting member away from the substrate extends to the outside of the plastic package body; a signal pin, the signal pin is fixed on the end of the connecting member away from the substrate, and can be plug-in matched with the corresponding circuit board. Figures 1 to 3

[0037] Exemplarily, the substrate is used for installing and carrying various electronic components of the power module, and a metal circuit layer is further arranged on the substrate, which is used for forming a circuit board structure with specific functions. The end of the signal pin needs to extend to the outside of the plastic package body so as to be plug-in matched with the corresponding circuit board to realize the transmission of power signals and control signals. The existing power module is manufactured by reserving an installation hole on the plastic package body to communicate with the substrate and the outside, so that the signal pin can be installed on the substrate by using a pin machine after plastic packaging.

[0038] However, due to the material properties of the plastic package body, the plastic package body is prone to deformation in complex environments such as high temperature, which leads to changes in the position of the installation hole, and further leads to difficult installation of the signal pin or position deviation after installation of the signal pin, affecting the plug-in cooperation of the signal pin and the circuit board.

[0039] ​The power module of the present application is provided with the connecting member, so that the connecting member and various electronic components, including various chips, capacitors, etc., can be welded to the substrate first in the manufacturing process, and then the substrate with the various electronic components and the connecting member is placed into the plastic encapsulation mold for injection molding encapsulation.

[0040] Thus, the signal pin can be electrically connected to the substrate through the connecting member, on the one hand, the signal pin can be electrically connected between the signal pin and the substrate without passing through the mounting hole on the plastic encapsulation body, avoiding the change of the position of the mounting hole due to the deformation of the plastic encapsulation body, and thus avoiding the difficulty of installing the signal pin, and simplifying the installation process of the signal pin.

[0041] Preferably, as shown in Figure 1 and Figure 2 the end of the connecting member away from the substrate extends out of the plastic encapsulation body by a distance.

[0042] Exemplarily, the end of the connecting member away from the substrate extends out of the plastic encapsulation body by 0.5mm to 5mm, and the extending distance is preferably set to 1mm.

[0043] Thus, the welding area of the signal pin is increased, and the welding and fixation between the signal pin and the connecting member are facilitated, and at the same time, the signal pin can be kept at a certain distance from the plastic encapsulation body after installation, preventing the deformation of the plastic encapsulation body from affecting the position of the signal pin.

[0044] Preferably, as shown in Figure 2 the substrate of the present application is further provided with a solder pad, and the connecting member is welded and fixed to the solder pad.

[0045] The solder pad can provide a reliable welding surface and foundation for the connecting member and other electronic components, and ensure the reliability of the electrical and mechanical connection between the connecting member and the electronic components and the substrate, which is beneficial to improve the stability of the power module.

[0046] Preferably, as shown in Figure 1As shown, the connecting member and the substrate are fixed by reflow soldering, and / or the top end of the signal pin and the connecting member are fixed by reflow soldering.

[0047] Exemplarily, in actual application, the skilled in the art can flexibly adopt reflow soldering, laser welding, ultrasonic welding and torque welding and the like to realize the welding between the connecting member and the substrate and between the signal pin and the connecting member, preferably, the reflow soldering process is adopted, so that the precision and speed of welding can be ensured, the welding quality is improved, and the cost control is facilitated.

[0048] Preferably, as shown in the drawings, Figures 1 to 3 As shown, the connecting member of the utility model has a limiting structure, and the limiting structure is clamped with the plastic package to improve the stability and sealing property of the connection between the connecting member and the plastic package.

[0049] Exemplarily, in the injection molding process, the plastic sealing material can flow into the limiting structure to realize the close connection with the connecting member, on the one hand, the stability of the connection between the connecting member and the plastic package can be improved, and the mutual fixation effect is achieved; on the other hand, the sealing property between the plastic package and the connecting member is improved, the electronic components are protected from the external environment, and the service life of the electronic components is improved.

[0050] Preferably, as shown in the drawings, Figure 1 And Figure 3 As shown, the connecting member of the utility model is provided as a column structure, and the limiting structure is provided as an annular groove.

[0051] Exemplarily, the connecting structure can be provided as a cylindrical body or a multi-prism structure, and the limiting structure is provided as an annular groove, an annular protrusion or the like structure constructed on the main body structure, as long as the adhesion between the connecting member and the package can be increased, and the limiting of the two can be realized, and the flexible adjustment and change do not deviate from the principles and ranges of the utility model, and should be limited within the protection scope of the utility model.

[0052] The connecting member in the scheme is preferably provided as the combination of the column structure and the annular groove, so that the connecting member is dumbbell-shaped, thereby making the structure of the connecting member simple and easy to process, and being conducive to the cost control.

[0053] Preferably, as shown in the drawings, Figures 1 to 3 As shown, the connecting member of the utility model is made of at least one material selected from aluminum, copper, molybdenum copper, gold and silver.

[0054] The connecting member of the scheme is preferably made of aluminum alloy material, so as to ensure the electrical conductivity of the connecting member, realize the electrical connection between the signal pin and the substrate, and control the cost.

[0055] Preferably, as shown in the drawings, Figures 1 to 3The surface of the connecting member is further provided with a metal plating layer, and the metal plating layer is made of at least one material selected from nickel, gold and silver.

[0056] The metal plating layer can effectively improve the oxidation resistance and corrosion resistance of the connecting member in a complex environment while ensuring the electrical conductivity, thereby improving the stability and service life of the power module.

[0057] In addition, the inverter further provided on the basis of the above-mentioned storage device has the technical effects of the above-mentioned power module, and compared with the improved inverter, the inverter of the utility model can efficiently convert the input DC signal into stable AC signal and output, and can adjust the frequency, amplitude and the like as needed, thereby meeting various power supply requirements.

[0058] Finally, the vehicle further provided on the basis of the above-mentioned inverter has the technical effects of the above-mentioned inverter, and compared with the improved vehicle, the vehicle of the utility model can convert 12V DC into 220V AC, thereby meeting the use requirements of various electronic devices and greatly improving the convenience of power use of the driver and passenger.

[0059] Thus, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the utility model, and the technical schemes after the changes or replacements will fall within the protection scope of the utility model.

Claims

1. A power module, characterized in that, The power module includes: A substrate on which electronic components are disposed; A molding compound, which is disposed on the substrate to encapsulate the electronic components; A connecting member, which is fixed to the substrate and penetrates the encapsulation, such that one end of the connecting member away from the substrate extends out of the encapsulation. The signal pin is fixed to the end of the connecting member away from the substrate and can be plugged into and engaged with the corresponding circuit module.

2. The power module according to claim 1, characterized in that, The end of the connecting member away from the substrate extends a certain distance outside the encapsulation body.

3. The power module according to claim 1, characterized in that, The substrate is also provided with solder pads, and the connecting member is welded and fixed to the solder pads.

4. The power module according to claim 1, characterized in that, The connecting member is fixed to the substrate by reflow soldering, and / or the signal pin is fixed to the top of the connecting member by reflow soldering.

5. The power module according to claim 1, characterized in that, The connecting member has a limiting structure, which engages with the encapsulated body to improve the stability and sealing of the connection between the connecting member and the encapsulated body.

6. The power module according to claim 5, characterized in that, The connecting member is configured as a column structure, and the limiting structure is configured as an annular groove.

7. The power module according to any one of claims 1 to 6, characterized in that, The surface of the connecting member is also provided with a metal plating layer.

8. An inverter, characterized in that, The inverter includes the power module according to any one of claims 1 to 7.

9. A vehicle, characterized in that, The vehicle includes the inverter as described in claim 8.

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