A high voltage interlocking device for automobile inverter

Abstract

The present invention relates to a high-voltage interlocking device for automobile inverter, comprising a three-phase cover part connected to the three-phase output end of the inverter cover and a high-voltage interlocking part located at the DC input end of the inverter housing, wherein the three-phase cover part is connected to the high-voltage interlocking part, and the high-voltage interlocking part is located between the high-voltage harness connector and the inverter housing, and the high-voltage harness connector passes through the high-voltage interlocking part to connect the DC input end of the inverter housing, realizing the function that the high-voltage DC harness must be disconnected first when disassembling the inverter, and the three-phase cover part realizes the function of covering the three-phase output end of the inverter cover. Compared with the prior art, the device has cost saving, convenient installation, low failure rate and high safety.

Description

Technical Field

[0001] The invention relates to electric and hybrid vehicles, and in particular to a high-voltage interlocking device for an automobile inverter. Background Art

[0002] As the core component of electric and hybrid vehicles, the inverter plays the role of current conversion and vehicle control. With the changes in market demand, the power requirements of the inverter are constantly increasing, and the voltage input to the inverter through the power battery is also getting higher and higher, which brings safety hazards to the inverter during the R&D and testing stage and subsequent maintenance. How to disconnect the power of the inverter during manual testing and maintenance has become a difficult problem.

[0003] The inverter and power battery are generally connected through a high-voltage wiring harness. When testing and repairing the inverter, due to the high voltage and large current in the inverter, the high-voltage wiring harness must be disconnected first, and then the inverter cover can be removed for inspection. If there is no necessary interlocking device, it will inevitably cause great safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a high voltage interlocking device for an automobile inverter in order to overcome the defects of the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A high-voltage interlocking device for an automobile inverter comprises a three-phase cover portion correspondingly connected to a three-phase output terminal of an inverter upper cover and a high-voltage interlocking portion located at a DC input terminal of an inverter housing, wherein the high-voltage interlocking portion is located between a high-voltage wire harness connector and the inverter housing, the high-voltage wire harness connector passes through the high-voltage interlocking portion to connect to the DC input terminal of the inverter housing, and the three-phase cover portion is connected to the high-voltage interlocking portion.

[0007] The three-phase cover part is provided with a convex bump.

[0008] The three-phase cover part is provided with screw holes, and the three-phase cover part is connected to the three-phase output end of the inverter upper cover through the screw holes.

[0009] The high-voltage interlocking part is provided with a cavity, and the high-voltage wiring harness connector is connected to the port of the DC input end of the inverter housing through the cavity.

[0010] The high-voltage interlocking part is connected to the DC input terminal of the inverter housing.

[0011] The cross section of the high-voltage interlocking part is U-shaped, the wing plate of the high-voltage interlocking part is clamped with the DC input terminal of the inverter housing, the upper wing plate is connected to the three-phase cover part, and the cavity is located at the web.

[0012] The three-phase cover part is fixedly connected to the high-voltage interlocking part.

[0013] The three-phase cover part and the high-voltage interlocking part are integrally formed.

[0014] The three-phase cover part and the high-voltage interlocking part are provided with positioning holes.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) Wide range of applications: The shape of the high-voltage interlocking device can be designed according to the different shapes of the high-voltage wiring harness connector of the inverter and the ports of the three-phase output end of the inverter cover. Regardless of the shapes of the high-voltage wiring harness connector and the ports of the three-phase output end of the inverter cover, a corresponding high-voltage interlocking device can be designed; in addition, the installation position of the high-voltage interlocking device can also be adjusted according to the changing shape of the inverter, and it has high applicability.

[0017] (2) Cost saving: The three-phase cover can be used as the three-phase output terminal cover of the inverter. The high-voltage interlocking part is connected to the three-phase cover by a mechanical structure and assembled with the inverter as a whole, which saves design costs and strengthens the firmness of the inverter housing. The mechanical structure ensures that the high-voltage wire harness connector must be manually disconnected before the inverter can be opened before repairing the inverter, ensuring that the power is turned off first when disassembling the inverter, which is highly safe.

[0018] (3) Easy to install, low failure rate, and easy maintenance: There are positioning holes on the high-voltage interlocking device for positioning with the inverter, with high positioning accuracy. It is fixed to the inverter by tightening screws, which is easy to install. The purely mechanical structure does not require circuits and software, has a low failure rate, and is easy to maintain later.

[0019] (4) The three-phase cover is provided with a convex bump to increase the strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of the high-voltage interlocking device of the present invention installed in an automobile inverter;

[0021] Figure 2 It is a front view of the high-voltage interlocking device of the present invention;

[0022] Figure 3 A top view of the high-voltage interlocking device of the present invention;

[0023] Figure 4 It is a three-dimensional diagram of the high-voltage interlocking device of the present invention;

[0024] Reference numerals:

[0025] 1 is the high-voltage interlocking device; 2 is the inverter cover; 3 is the inverter housing; 4 is the high-voltage wire harness connector; 5 is the high-voltage wire harness; 6 is the screw hole; 7 is the positioning hole; 8 is the three-phase cover part; 9 is the high-voltage interlocking part. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Example

[0028] The present embodiment provides a high-voltage interlocking device for an automobile inverter, comprising a three-phase cover portion 8 connected corresponding to the three-phase output terminal of the inverter upper cover and a high-voltage interlocking portion 9 located at the DC input terminal of the inverter housing. The high-voltage interlocking portion 9 is located between the high-voltage wire harness connector 4 and the inverter housing 3. The high-voltage wire harness connector 4 passes through the high-voltage interlocking portion 9 to connect to the DC input terminal of the inverter housing. The three-phase cover portion 8 is connected to the high-voltage interlocking portion 9, and the three-phase cover portion can be used as a three-phase output cover.

[0029] Specifically:

[0030] The three-phase cover part 8 corresponds to the three-phase output terminal of the inverter cover. The three-phase cover part 8 is provided with a convex bump to increase the strength. The three-phase cover part 8 is provided with screw holes 6. The three-phase cover part 8 is connected to the three-phase output terminal of the inverter cover through four screw holes 6 by self-tapping screws.

[0031] The high-voltage interlocking part 9 is provided with a cavity, the high-voltage wire harness connector 4 is connected to the port of the DC input end of the inverter housing through the cavity, the high-voltage wire harness connector 4 is connected to the high-voltage wire harness 5, and the high-voltage interlocking part 9 is snap-fitted to the DC input end of the inverter housing; one implementation method is that the cross-section of the high-voltage interlocking part 9 is U-shaped, the wing plate of the high-voltage interlocking part 9 is snap-fitted to the DC input end of the inverter housing (one of the two wing plates is snapped to the inverter housing 3, and the other is snapped to the inverter upper cover 2), the upper wing plate is connected to the three-phase cover part, and the cavity is located at the belly plate. Of course, the high-voltage interlocking part 9 does not necessarily have to include technical features such as cavity and snap-fitting, it is only necessary to ensure that the high-voltage wire harness connector 4 passes through the high-voltage interlocking part 9 to connect to the DC input end of the inverter housing.

[0032] The three-phase cover part 8 and the high-voltage interlocking part 9 can be fixedly connected, detachably connected, integrally formed, etc. The three-phase cover part 8 and the high-voltage interlocking part 9 are both provided with positioning holes 7 .

[0033] The automobile inverter high voltage interlocking device of this embodiment has the following advantages:

[0034] Cost saving: The three-phase cover part can be used as the three-phase output terminal cover of the inverter. The high-voltage interlocking part is connected to the three-phase cover part by a mechanical structure, and assembled with the inverter as a whole, which saves design costs and strengthens the firmness of the inverter housing. The mechanical structure ensures that before repairing the inverter, the high-voltage wire harness connector must be manually unplugged before the inverter can be opened, ensuring the requirement of powering off first when disassembling the inverter, and has high safety.

[0035] Easy to install, low failure rate, and easy maintenance: There are positioning holes on the high-voltage interlocking device for positioning with the inverter, with high positioning accuracy. It is fixed to the inverter by self-tapping screws, which is easy to install. The pure mechanical structure does not require circuits and software, has a low failure rate, and is easy to maintain later.

[0036] Wide range of applications: The shape of the high-voltage interlocking device can be designed according to the different shapes of the high-voltage wiring harness connector of the inverter and the ports of the three-phase output end of the inverter cover. Regardless of the shapes of the high-voltage wiring harness connector and the ports of the three-phase output end of the inverter cover, a corresponding high-voltage interlocking device can be designed; in addition, the installation position of the high-voltage interlocking device can also be adjusted according to the changing shape of the inverter, and it has high applicability.

Claims

1. A high voltage interlocking device for an automobile inverter, characterized in that: The invention comprises a three-phase cover part (8) connected to the three-phase output end of the inverter upper cover and a high-voltage interlocking part (9) located at the DC input end of the inverter housing, wherein the high-voltage interlocking part (9) is located between the high-voltage wire harness connector (4) and the inverter housing (3), and the high-voltage wire harness connector (4) passes through the high-voltage interlocking part (9) to connect to the DC input end of the inverter housing, and the three-phase cover part (8) is provided with a convex bulge, and the three-phase cover part (8) is connected to the high-voltage interlocking part (9); The high-voltage interlocking part (9) is provided with a cavity, the high-voltage interlocking part (9) is snap-connected with the DC input end of the inverter housing, and the high-voltage wiring harness connector (4) is connected to the port of the DC input end of the inverter housing through the cavity.

2. The automobile inverter high voltage interlocking device according to claim 1, characterized in that: The three-phase cover part (8) is provided with a screw hole (6), and the three-phase cover part (8) is connected to the three-phase output terminal of the inverter upper cover through the screw hole (6).

3. The automobile inverter high voltage interlocking device according to claim 1, characterized in that: The cross section of the high-voltage interlocking part (9) is U-shaped, the wing plate of the high-voltage interlocking part (9) is clamped with the DC input terminal of the inverter housing, the upper wing plate is connected to the three-phase cover part (8), and the cavity is located on the web.

4. The automobile inverter high voltage interlocking device according to claim 1, characterized in that: The three-phase cover part (8) is fixedly connected to the high-voltage interlocking part (9).

5. The automobile inverter high voltage interlocking device according to claim 1, characterized in that: The three-phase cover part (8) and the high-voltage interlocking part (9) are integrally formed.

6. The automobile inverter high voltage interlocking device according to claim 1, characterized in that: The three-phase cover part (8) and the high-voltage interlocking part (9) are provided with positioning holes (7).

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