Electrical device, electric drive assembly system and vehicle

Abstract

The utility model relates to an electrical device (100), the electrical device comprises a housing (101), and a power device (1), a crimping part (2) and a printed circuit board (3) which are accommodated in the housing (101), the power device (1) comprises a device body (10) and a bent pin (11) located at the end portion of the device body (10), the end part of a pin (11) of the power device (1) is vertically inserted into a pin hole of the printed circuit board (3), the power device (1) is fixed on a first plane (102) of the shell (101) through the crimping part (2), and the bending angle alpha of the pin of the power device (1) is greater than 90 degrees and less than 180 degrees. The utility model further relates to an electric drive assembly system comprising the electric device and a vehicle.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electrical device. In particular, an electrical device with a small space occupied by power devices and a low installation rejection rate. The utility model further relates to an electric drive assembly system and a vehicle comprising such an electrical device. BACKGROUND

[0002] Various types of electrical devices can include power devices, such as IGBTs (Insulate-Gate Bipolar Transistors). IGBTs are power semiconductor devices that combine the advantages of metal-oxide semiconductor field-effect transistors and bipolar transistors, with high input impedance and low on-state voltage drop. IGBTs achieve switching function through voltage control, and are equivalent to a wire when turned on and an open circuit when turned off. The working principle is to form a channel and turn on the current by applying a driving voltage between the gate and the emitter; otherwise, applying a 0V voltage will cut off the current. IGBTs are widely used in situations requiring large currents and high voltages, such as AC motors, frequency converters, switching power supplies, traction drives, etc. Due to their high-frequency characteristics, IGBTs play an important role in modern power electronics.

[0003] The bending angle of the pins of the power devices on the market is currently 90° or 180°. However, the installation and fixing structure of power devices with a bending angle of 90° or 180° of the pins in electrical devices all have defects. For power devices with a bending angle of 90° of the pins, the rejection rate of automatic assembly is low, but the space occupied is large; for power devices with a bending angle of 180° of the pins, the space occupied is smaller, but the rejection rate of automatic assembly is high.

[0004] Therefore, it is desirable to propose an electrical device with a specific installation and fixing structure of power devices to improve the defects in the prior art described above. SUMMARY

[0005] According to an aspect of the utility model, an electrical device is proposed, comprising: a housing and a power device, a crimping component and a printed circuit board accommodated in the housing, the power device comprising a device body and a bent pin at the end of the device body, the end of the pin of the power device being inserted vertically into a pin hole of the printed circuit board, the power device being fixed on a first plane of the housing by the crimping component, and the bending angle of the pin of the power device being greater than 90° and less than 180°.

[0006] According to the electrical device, the bending angle of the pin of the power device is greater than 90 degrees and less than 180 degrees, and due to the specific bending angle of the pin, the power device needs to be fixed on an inclined slope of the electrical device, so that a space-saving mounting structure is realized, and meanwhile the pin of the power device can be accurately inserted into the printed circuit board, so that a low installation scrap rate is realized.

[0007] According to the electrical device, the bending angle of the pin of the power device is greater than 90 degrees and less than 180 degrees, and due to the specific bending angle of the pin, the power device needs to be fixed on an inclined slope of the electrical device, so that a space-saving mounting structure is realized, and simultaneously the pin of the power device can be accurately inserted into the printed circuit board, so that a low installation scrap rate is realized.

[0008] According to one embodiment of the utility model, the bending angle alpha of the pin of the power device is between 95 degrees and 175 degrees and includes 95 degrees and 175 degrees.

[0009] According to one embodiment of the utility model, the printed circuit board is parallel with the bottom wall of the shell, and the angle beta formed by the first plane and the bottom wall of the shell is alpha-90 degrees.

[0010] According to one embodiment of the utility model, the crimping part includes elastic sheet or plastic fixing piece or screw.

[0011] According to one embodiment of the utility model, the crimping part is hot riveted to the printed circuit board or the crimping part is screwed to the shell.

[0012] According to one embodiment of the utility model, the electrical device further includes a heat dissipation component, which is arranged between the power device and the first plane of the shell and is used for dissipating heat of the power device.

[0013] According to one embodiment of the utility model, the electrical device is an inverter.

[0014] According to another aspect of the utility model, an electric drive assembly system is provided, which includes the above-mentioned electrical device.

[0015] According to still another aspect of the utility model, a vehicle is provided, which includes the above-mentioned electric drive assembly system. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art. The following drawings are not deliberately drawn according to the actual size, and the emphasis is on showing the main idea of the utility model.

[0017] Figure 1A andFigure 1B A fixing structure of a power device with a bending angle of 90° of the pin is shown;

[0018] Figure 1C A fixing structure of a power device with a bending angle of 180° of the pin is shown;

[0019] Figure 2 A structural schematic diagram of a power device according to an embodiment of the present application is shown;

[0020] Figure 3 A partial structural schematic diagram of an electrical device according to an embodiment of the present application is shown, in which a fixing installation structure of a power device is shown;

[0021] Figure 4 A partial sectional view of an electrical device is shown; Figure 3

[0022] Figure 5 A structural schematic diagram of one example of a crimping component according to an embodiment of the present application is shown.

[0023] Reference signs

[0024] 100 Electrical device

[0025] 101 Housing

[0026] 102 First plane

[0027] 103 Bottom wall

[0028] 1 Power device

[0029] 10 Device body

[0030] 11 Pin

[0031] 2 Crimping component

[0032] 3 Printed circuit board

[0033] 4 Heat dissipation component

[0034] 5 Positioning clamp

[0035] 6 Spring plate

[0036] 7 Plastic piece

[0037] 21 Accommodation portion

[0038] 22 Component body

[0039] 23 Fixing column DETAILED DESCRIPTION

[0040] ​In order to make the technical scheme of the utility model more clear, the following will be combined with the specific embodiment of the utility model, and the technical scheme of the utility model embodiment will be described clearly and completely. Unless otherwise specified, the terms used herein have the usual meaning in the art. The same reference numerals in the drawings represent the same parts.

[0041] The bending angle of the pin of the power device on the market is 90° or 180°, and the power device with a bending angle of 90° or 180° has different fixed mounting structures. For example, for the power device with a bending angle of 90°, as shown in Figure 1A and 1B , the mounting and fixing mode is as follows: first, the power device 1 is assembled to the shell of the electrical device through the positioning clamp 5, then the spring sheet 6 is assembled, the power device 1 is pressed through the deformation of the spring sheet 6, the positioning clamp 5 is removed after the power device 1 is pressed by the spring sheet 6, then the printed circuit board is mounted, so that the pin of the power device 1 is inserted into the pin hole of the printed circuit board. In Figure 1A and Figure 1B , taking the IGBT with six models of TO-247 as an example, it is calculated that the overall automatic assembly scrap rate is about 0.6%, and the layout occupies a space of 50cm2, which occupies a larger space.

[0042] For example, for the power device with a bending angle of 180°, as shown in Figure 1C , the mounting and fixing mode is as follows: first, the power device 1 is assembled with the plastic part 7, then the plastic part 7 containing the power device 1 is assembled on the shell of the electrical device with the positioning hole, then the spring sheet 6 is assembled to press the power device 1 on the shell through the spring sheet 6, then the printed circuit board is mounted, so that the pin of the power device 1 is inserted into the pin hole of the printed circuit board. Similarly, in Figure 1C , taking the IGBT with six models of TO-247 as an example, it is calculated that the overall layout occupies a space of 10cm2, which occupies a smaller space, but since the positioning hole of the plastic part 7 inserted is different from the positioning hole of the printed circuit board, the positioning reference of the power device 1 and the printed circuit board is different, and the plastic part 7 and the positioning hole are clearance fit, the precision is low, and the cumulative tolerance is large, so the pin of the power device may not be accurately inserted into the pin hole of the printed circuit board, and the scrap rate is high, about 16%.

[0043] It should be noted that the occupied space of the power device refers to the projection area of the power device on the bottom wall of the shell of the electrical device. It should be noted that the size of the occupied space of the power device is affected by the model of the power device and the bending position of the pin, and in the utility model, the same model and the same bending position of the pin of the power device are calculated.

[0044] Therefore, there is a need to design an electrical device in which the power devices occupy a small space and the scrap rate of the installed power devices is low.

[0045] Figure 2 This is a schematic diagram of the power device 1 according to an embodiment of the present invention. Figure 2 As shown, the power device 1 includes a device body 10 and a bent pin 11 located at the end of the device body 10, the bending angle of which is denoted as α. In this embodiment, the bending angle α of the pin of the power device 1 is set to be greater than 90° and less than 180°. Preferably, the bending angle α of the pin of the power device 1 can be set between 95° and 175°, and includes both 95° and 175°. For different models of power devices, the bendable position of the pins is limited by the specific device model, and the bendable position of the pins can be set with reference to the specific device requirements.

[0046] It should be noted that this utility model does not limit the type and model of the power device 1, such as it can be an IGBT or a silicon carbide MOSFET, etc.

[0047] Figure 3 This is a partial structural schematic diagram of an electrical device 100 according to an embodiment of the present invention, showing the fixed mounting structure of the power devices. The electrical device 100 can be, for example, an inverter used to convert input direct current (DC) to alternating current (AC) and output the AC power. It should be understood that the present invention is not intended to limit the specific type of electrical device; the electrical device can also be, for example, any other suitable electrical device such as an on-board charger.

[0048] Figure 4 for Figure 3 A partial sectional view of the electrical device 100 shown. (See attached image.) Figure 4 As shown, the electrical device 100 includes a housing 101 and a power device 1, a crimping member 2, and a printed circuit board 3 housed within the housing 101. The printed circuit board 3 is parallel to the bottom wall 103 of the housing 101, and the ends of the pins 11 of the power device 1 are vertically inserted into the pin holes of the printed circuit board 3. Figure 4As can be seen, the power device 1 is crimped by the crimping component 2 on a slope extending from the bottom wall 103 of the shell 101, hereinafter referred to as a first plane 102, and the device body 10 is attached to the first plane 102. The bending angle of the pin of the power device 1 is marked as α, and the angle formed between the first plane 102 and the bottom wall 103 of the shell 101 is marked as β, and the relationship between the two angles is β = α - 90°. That is, the angle formed between the device body 10 and the bottom wall 103 of the shell 101 is β = α - 90°. It should be noted that the bending angle of the pin of the power device 1 can be determined according to actual needs, and accordingly, the shell 101 of the electrical device 100 is designed and manufactured according to the determined bending angle, that is, a slope is formed with the bottom wall 103 of the shell 101 at an angle of β. For example, if the bending angle of the pin of the power device 1 is set to 150°, the shell 101 needs to be designed accordingly with a slope of 60° with the bottom wall 103.

[0049] As described above, the bending angle α of the pin of the power device of the utility model is greater than 90° and less than 180°. The reason why the angle α is not set in the range of 0° to 90° is that the power device cannot be assembled, because the pin of the power device needs to be inserted vertically into the printed circuit board, and if the bending angle is in the range of 0° to 90°, the power device will interfere with the printed circuit board. The reason why the angle α is not set in the range of 180° to 360° is that it will cause the shell to have an internal buckle design, thereby causing the shell to be difficult to demold.

[0050] Since the range of the angle α is greater than 90° and less than 180°, the range of the angle β is greater than 0° and less than 90°. Assuming that the space occupied by the power device with a bending angle of 90° of the pin is S, then the space occupied by the power device of the utility model is . For example, for the IGBT with a space of 50 cm 2 as described above, in the case that the bending position of the pin is the same, when the bending angle of the pin is 150°, the space occupied by the IGBT is 25 cm 2 <50 cm 2 . Therefore, compared with the power device with a bending angle of 90° of the pin, the space occupied by the power device of the utility model is reduced. Further, the range of the angle α is set between 95° and 175° (including 95° and 175°), which can be obviously distinguished from 90° and 180°, and better technical effects are achieved.

[0051] As shown in Figure 4 , the electrical device 100 can further include a heat dissipation component 4. The heat dissipation component 4 is arranged between the power device 1 and the first plane 102 of the shell 101, and is used for dissipating heat from the power device 1.

[0052] In this embodiment, the power device is fixed in the following way: first, the power device 1 is assembled to the housing 101 of the electrical device 100 by using a positioning clamp, then the crimping component 2 is installed to press the power device 1 to the housing 101, the positioning clamp is removed after the crimping component 2 presses the power device 1, then the printed circuit board 3 is installed into the housing 101 so that the pins of the power device 1 are inserted into the pin holes of the printed circuit board, and finally the crimping component 2 is hot riveted to the printed circuit board 3. Since the positioning clamp is used for positioning in the utility model, and the positioning clamp and the printed circuit board use the same positioning reference, for example, the same positioning pin is used for positioning, so that the pins of the power device can be accurately inserted into the printed circuit board at the same time, and the scrap rate is reduced by 15% compared with the power device with a bending angle of 180° of the pins.

[0053] It should be noted that this embodiment also takes the power device of 6 models for TO-247 as an example to calculate the scrap rate and the occupied space.

[0054] In summary, the installation and fixing structure of the power device of the electrical device is simple and efficient, and the installation scrap rate of the power device can be reduced compared with the power device with a bending angle of 180° of the pins. Moreover, due to the specific pin bending angle of the power device in the utility model, the occupied space can be saved compared with the power device with a bending angle of 90° of the pins.

[0055] In Figure 4 the illustrated embodiment, the crimping component 2 is a plastic fixing component, and the specific structure thereof can refer to Figure 5 . As shown in Figure 5 , the crimping component 2 includes a containing portion 21 for containing the fixed power device and a component main body 22. The component main body 22 is provided with a fixing column 23. As shown in Figure 4 , the fixing column 23 can be inserted into the printed circuit board 3 and hot riveted to the printed circuit board 3.

[0056] It should be noted that Figure 5 the crimping component 2 is only an example, and the shape and type of the crimping component 2 are not limited in the disclosure. For example, the crimping component 2 can also be a spring or a screw, etc. For example, for the spring, it can be threadedly connected to the housing 101 and deformed to press the power device. For example, for the screw, it can pass through the threaded holes provided on the power device, the heat dissipation component and the housing and be threadedly connected to the housing 101 to fix the power device.

[0057] According to another aspect of the utility model, an electric drive assembly system is provided, which comprises the electrical device 100 as described above. It should be understood that the electric drive assembly system of the utility model also has the advantages described above with respect to the electrical device.

[0058] According to another aspect of the present application, a vehicle is provided, which comprises the electric drive assembly system as described above. The vehicle can be an electrified vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a range extended EV, a fuel cell electric vehicle (FCEV). The vehicle can also be a hydrogen energy vehicle. It should be understood that the vehicle of the present application also has the advantages described above with respect to the electric device.

[0059] Some features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0060] The present application is described in detail herein with reference to preferred embodiments, however, it should be understood by those skilled in the art that various modifications and changes can be made to the above specific embodiments without departing from the concept of the present application, and various technical features and structures proposed by the present application can also be combined without exceeding the scope of the present application, and the scope of protection of the present application is determined by the appended claims.

Claims

1. An electrical device (100), wherein, The electrical device comprises a housing (101) and a power device (1), a crimping component (2) and a printed circuit board (3) accommodated in the housing (101), the power device (1) comprises a device body (10) and a bent pin (11) at an end of the device body (10), an end of the pin (11) of the power device (1) is vertically inserted into a pin hole of the printed circuit board (3), and the power device (1) is fixed on a first plane (102) of the housing (101) by the crimping component (2), characterized in that a bending angle α of the pin of the power device (1) is greater than 90° and less than 180°.

2. The electrical device (100) according to claim 1, characterized in that The bending angle α of the pin of the power device (1) is between 95° and 175°, inclusive.

3. The electrical device (100) according to claim 1, characterized in that The printed circuit board (3) is parallel to a bottom wall (103) of the housing (101), and an angle β formed by the first plane (102) and the bottom wall (103) of the housing (101) is α-90°.

4. The electrical device (100) according to claim 1, characterized in that The crimping component (2) comprises a spring or a plastic fixing component or a screw.

5. The electrical device (100) of claim 1, characterized in that The crimping component (2) is hot riveted to the printed circuit board (3) or the crimping component (2) is threadedly connected to the housing (101).

6. The electrical device (100) of claim 1, characterized in that The electrical device (100) further comprises a heat dissipation component (4), wherein the heat dissipation component (4) is arranged between the power device (1) and the first plane (102) of the housing (101) and is used for dissipating heat of the power device (1).

7. The electrical device (100) according to any one of claims 1 to 6, characterized in that The electrical device is an inverter.

8. An electric drive assembly system comprising the electrical device (100) according to any one of claims 1 to 7.

9. A vehicle comprising the electric drive assembly system according to claim 8.

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