Axle pipe assembly and motor controller

Abstract

The utility model provides a bridge tube assembly and a motor controller, the bridge tube assembly comprises a liquid cooling bridge body, a radiator, a ceramic chip and a power tube, the radiator is arranged on the side surface of the liquid cooling bridge body; conductors are arranged on the surfaces of the two sides of the ceramic chip, and the conductor on the first side surface of the ceramic chip is connected with the radiator in a welded mode. And the power tube is in welded connection with the conductor on the second side surface of the ceramic chip. The bridge tube assembly solves the problems that media between the power tube and the radiator in the bridge tube assembly in the prior art are too much, heat conduction efficiency is low, and the purpose of effectively cooling the power tube cannot be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and particularly relates to a bridge tube assembly and a motor controller. Background Art

[0002] New energy vehicles have many characteristics such as environmental protection and low pollution because they do not burn gasoline or diesel to generate power. With the popularization and application of new energy power generation such as water energy, wind energy, solar energy, and nuclear energy, many new energy vehicles are gradually being promoted and applied, such as new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail transit vehicles, new energy electric flying vehicles, new energy electric shipping vehicles, etc.

[0003] New energy vehicles are generally equipped with a battery, a motor control device, a motor, and a power generation device. The power tube in the motor control device receives the direct current output by the battery, and converts the direct current into alternating current by inversion and outputs it to the motor. Then, the motor outputs a rotational driving force to drive the power generation device such as wheels and propellers, and then drives the vehicle to move forward.

[0004] However, there is too much medium between the power tube and the radiator in the existing bridge tube assembly, and the heat conduction efficiency is low, so the purpose of effectively cooling the power tube cannot be achieved. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a bridge tube assembly and a motor controller to solve the problem that there is too much medium between the power tube and the radiator in the existing bridge tube assembly, the heat conduction efficiency is low, and the purpose of effectively cooling the power tube cannot be achieved.

[0006] To achieve the above purpose, according to one aspect of the utility model, a bridge tube assembly is provided, which includes a liquid-cooled bridge body, a radiator, a ceramic sheet, and a power tube. Among them, the radiator is located on the side surface of the liquid-cooled bridge body; conductive bodies are arranged on both side surfaces of the ceramic sheet, and the conductive body on the first side surface of the ceramic sheet is welded to the radiator; the power tube is welded to the conductive body on the second side surface of the ceramic sheet.

[0007] Furthermore, the radiator and the liquid-cooled bridge body are of a split structure.

[0008] Further, the radiator includes a heat dissipation plate and a plurality of heat dissipation blocks. The heat dissipation plate is connected to the side surface of the liquid cooling bridge body. The plurality of heat dissipation blocks are evenly distributed on the heat dissipation plate and are arranged with a distance between adjacent heat dissipation blocks. There are a plurality of ceramic sheets, and the plurality of ceramic sheets correspond to the plurality of heat dissipation blocks one by one. The conductors on the first side surface of each ceramic sheet correspond to and are welded to the corresponding heat dissipation blocks one by one. There are a plurality of power tubes, and the plurality of power tubes correspond to the plurality of ceramic sheets one by one. Each power tube corresponds to and is welded to the conductor on the second side surface of the corresponding ceramic sheet one by one.

[0009] Further, radiators are provided on both side surfaces of the liquid cooling bridge body, and a plurality of ceramic sheets and a plurality of power tubes are correspondingly provided for the radiators on the same side.

[0010] Further, the number of heat dissipation blocks on the first side surface of the liquid cooling bridge body is equal to the number of heat dissipation blocks on the second side surface of the liquid cooling bridge body, and the heat dissipation blocks on both side surfaces of the liquid cooling bridge body are symmetrically arranged.

[0011] Further, in the direction from the power tube to the liquid cooling bridge body, the projected area of the ceramic sheet is larger than the projected area of the heat dissipation block, so that the area of the ceramic sheet without the conductor is located at the heat dissipation plate, in order to increase the creepage distance between the power tube and the heat dissipation block.

[0012] Further, in the direction from the power tube to the liquid cooling bridge body, the projected shape of the conductor is adapted to the projected shape of the power tube; and / or, in the direction from the power tube to the liquid cooling bridge body, the projected shape of the heat dissipation block is adapted to the projected shape of the power tube; and / or, in the direction from the power tube to the liquid cooling bridge body, the projected shape of the heat dissipation block is adapted to the projected shape of the conductor.

[0013] Further, the bridge tube assembly further includes an insulating structure. The insulating structure is clamped between the radiator and the ceramic sheet, and the insulating structure has an avoidance notch for avoiding the heat dissipation block.

[0014] Further, the insulating structure includes a support sheet body and a plurality of spacer sheet bodies. Among them, the support sheet body extends along the arrangement direction of the plurality of heat dissipation blocks; the plurality of spacer sheet bodies are all connected to the same side of the support sheet body, so that an avoidance notch is formed between adjacent spacer sheet bodies.

[0015] Further, the insulating structure is an imide film.

[0016] According to another aspect of the present invention, a motor controller is provided, including a bridge tube assembly, and the bridge tube assembly is the above-mentioned bridge tube assembly.

[0017] Applying the technical solution of the present utility model, by arranging conductors on both side surfaces of the ceramic sheet, the conductor on the first side surface of the ceramic sheet is welded to the radiator. At the same time, the power tube is welded to the conductor on the second side surface of the ceramic sheet. On the one hand, the installation stability of the ceramic sheet is ensured, so as to ensure that the ceramic sheet can play a good insulation effect; on the other hand, since there are conductors at the welding positions, while the conductors have electrical conductivity, they also have good heat conductivity, which is beneficial to improving the heat conduction efficiency between the radiator and the power tube, and further achieving the purpose of effectively cooling the power tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The schematic diagrams in the specification attached hereto, which form a part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and shall not constitute an improper limitation to the present utility model. In the drawings:

[0019] Figure 1 The exploded structural schematic diagram of a bridge tube assembly according to an optional embodiment of the present utility model is shown.

[0020] Among them, the above-mentioned drawings include the following reference numerals:

[0021] 10, liquid cooling bridge body;

[0022] 20, radiator; 21, heat dissipation plate; 22, heat dissipation block;

[0023] 30, ceramic sheet; 31, conductor;

[0024] 40, power tube;

[0025] 50, insulation structure; 51, support sheet body; 52, spacer sheet body; 53, avoidance notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and shall in no way be construed as a limitation to the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0027] In order to solve the problem that there is too much medium between the power tube and the radiator in the existing bridge tube assembly, the heat conduction efficiency is low, and the purpose of effectively cooling the power tube cannot be achieved, the present utility model provides a bridge tube assembly and a motor controller. Among them, the motor controller includes a bridge tube assembly, and the bridge tube assembly is the bridge tube assembly described above and below.

[0028] As Figure 1 shown, the bridge tube assembly includes a liquid-cooled bridge body 10, a radiator 20, a ceramic sheet 30, and a power tube 40. Among them, the radiator 20 is located on the side surface of the liquid-cooled bridge body 10; conductive bodies 31 are provided on both side surfaces of the ceramic sheet 30, and the conductive body 31 on the first side surface of the ceramic sheet 30 is welded to the radiator 20; the power tube 40 is welded to the conductive body 31 on the second side surface of the ceramic sheet 30.

[0029] Applying the technical solution of the present utility model, by providing conductive bodies 31 on both side surfaces of the ceramic sheet 30, the conductive body 31 on the first side surface of the ceramic sheet 30 is welded to the radiator 20. At the same time, the power tube 40 is welded to the conductive body 31 on the second side surface of the ceramic sheet 30. On the one hand, it ensures the installation stability of the ceramic sheet 30, thereby ensuring that the ceramic sheet 30 can play a good insulation effect; on the other hand, due to the presence of conductive bodies 31 at the welding positions, while the conductive bodies 31 have electrical conductivity, they also have good heat conduction performance, which is beneficial to improving the heat conduction efficiency between the radiator 20 and the power tube 40, and further achieving the purpose of effectively cooling the power tube 40.

[0030] Optionally, the ceramic sheet 30 is copper-clad (conductive body 31) on both side surfaces through a direct bonded copper (DBC) process for ceramic substrates, and the power tube 40 (IGBT) is soldered to the ceramic sheet 30 through a surface mounted technology (SMT) process, and the ceramic sheet 30 is welded to the radiator 20 through the SMT process.

[0031] It should be noted that in this application, since there is a conductive surface on the surface of the power tube 40 (IGBT), a ceramic sheet 30 and an insulating structure 50 need to be added between the power tube 40 and the radiator 20 to meet the insulation requirements, and soldering to connect metal media can effectively improve the heat conduction efficiency.

[0032] The radiator 20 and the liquid-cooled bridge body 10 are of a split structure. In this way, by setting the liquid-cooled bridge body 10 and the radiator 20 in a split structural form, according to the heat dissipation requirements of the power tube 40, the liquid-cooled bridge body 10 and the radiator 20 can be made of different materials respectively, ensuring that the bridge tube assembly provided in this application has high applicability.

[0033] Furthermore, in the present application, preferably, the thermal conductivity of the heat sink 20 is greater than that of the existing heat sink (the material of the existing heat sink is die-cast material ADC12). In this way, it is beneficial to further improve the heat conduction efficiency of the heat sink 20.

[0034] Preferably, the material of the heat sink 20 is 3003 aluminum, and the material of the liquid-cooled bridge body 10 is plastic PPS.

[0035] As Figure 1 shown, the heat sink 20 includes a heat dissipation plate 21 and a plurality of heat dissipation blocks 22. The heat dissipation plate 21 is connected to the side surface of the liquid-cooled bridge body 10. The plurality of heat dissipation blocks 22 are evenly distributed on the heat dissipation plate 21 and are arranged with a distance between adjacent two heat dissipation blocks 22; there are a plurality of ceramic sheets 30, and the plurality of ceramic sheets 30 correspond to the plurality of heat dissipation blocks 22 one by one. The conductors 31 on the first side surface of each ceramic sheet 30 correspond to the corresponding heat dissipation blocks 22 one by one and are welded and connected; there are a plurality of power tubes 40, and the plurality of power tubes 40 correspond to the plurality of ceramic sheets 30 one by one. Each power tube 40 corresponds to the conductor 31 on the second side surface of the corresponding ceramic sheet 30 one by one and is welded and connected.

[0036] As Figure 1 shown, heat sinks 20 are provided on both side surfaces of the liquid-cooled bridge body 10, and a plurality of ceramic sheets 30 and a plurality of power tubes 40 are correspondingly provided for the heat sinks 20 on the same side.

[0037] It should be noted that in the present application, the number of heat dissipation blocks 22 on the first side surface of the liquid-cooled bridge body 10 is equal to the number of heat dissipation blocks 22 on the second side surface of the liquid-cooled bridge body 10, and the heat dissipation blocks 22 on both side surfaces of the liquid-cooled bridge body 10 are symmetrically arranged. In this way, the overall structural regularity of the bridge pipe assembly is ensured.

[0038] As Figure 1 shown, in the direction from the power tube 40 to the liquid-cooled bridge body 10, the projected area of the ceramic sheet 30 is larger than the projected area of the heat dissipation block 22, so that the area of the ceramic sheet 30 without the conductor 31 is located at the heat dissipation plate 21 to increase the creepage distance between the power tube 40 and the heat dissipation block 22. In this way, it is ensured that the ceramic sheet 30 can play an effective insulating effect.

[0039] As Figure 1As shown, in the direction from the power tube 40 to the liquid-cooled bridge body 10, the projected shape of the conductor 31 is adapted to the projected shape of the power tube 40; and / or, in the direction from the power tube 40 to the liquid-cooled bridge body 10, the projected shape of the heat dissipation block 22 is adapted to the projected shape of the power tube 40; and / or, in the direction from the power tube 40 to the liquid-cooled bridge body 10, the projected shape of the heat dissipation block 22 is adapted to the projected shape of the conductor 31. In this way, the welding reliability between the conductor 31 on the first side surface of the ceramic sheet 30 and the heat dissipation block 22 is ensured, and the welding reliability between the power tube 40 and the conductor 31 on the second side surface of the ceramic sheet 30 is ensured.

[0040] As Figure 1 shown, the bridge tube assembly further includes an insulating structure 50. The insulating structure 50 is clamped between the radiator 20 and the ceramic sheet 30, and the insulating structure 50 has an avoidance notch 53 for avoiding the heat dissipation block 22. In this way, the setting of the insulating structure 50 ensures the insulation reliability between two adjacent heat dissipation blocks 22. In addition, the creepage distance between the conductor 31 on the ceramic sheet 30 and the heat dissipation block 22 is increased by adding the insulating structure 50.

[0041] As Figure 1 shown, the insulating structure 50 includes a support sheet body 51 and a plurality of spacer sheet bodies 52. Among them, the support sheet body 51 extends along the arrangement direction of the plurality of heat dissipation blocks 22; the plurality of spacer sheet bodies 52 are all connected to the same side of the support sheet body 51, so as to form an avoidance notch 53 between two adjacent spacer sheet bodies 52. In this way, by setting the insulating structure 50 into a structural form including the support sheet body 51 and the plurality of spacer sheet bodies 52, while ensuring that the support sheet body 51 and the plurality of spacer sheet bodies 52 can play a good insulation effect, it can also ensure that the avoidance notch 53 provides avoidance for the welding connection between the heat dissipation block 22 and the conductor 31, and ensures the welding connection reliability between the two.

[0042] Preferably, the insulating structure 50 is an imide film.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0045] For the sake of convenience of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used here to describe the spatial positional relationship of a device or feature shown in the drawings with other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations will be made for the spatial relative descriptions used here.

[0046] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A bridge pipe assembly, characterized in that, Comprising: A liquid cooling bridge body (10); A radiator (20), the radiator (20) being located on the side surface of the liquid cooling bridge body (10); A ceramic sheet (30), electrical conductors (31) being provided on both side surfaces of the ceramic sheet (30), the electrical conductor (31) on the first side surface of the ceramic sheet (30) being welded to the radiator (20); A power transistor (40), the power transistor (40) being welded to the electrical conductor (31) on the second side surface of the ceramic sheet (30).

2. The bridge pipe assembly according to claim 1, wherein, The radiator (20) and the liquid cooling bridge body (10) are of a split structure.

3. The bridge tube assembly according to claim 1, wherein The radiator (20) includes a heat dissipation plate (21) and a plurality of heat dissipation blocks (22), the heat dissipation plate (21) being connected to the side surface of the liquid cooling bridge body (10), the plurality of heat dissipation blocks (22) being evenly distributed on the heat dissipation plate (21) and being arranged with a distance between adjacent two of the heat dissipation blocks (22); There are a plurality of the ceramic sheets (30), the plurality of ceramic sheets (30) corresponding one-to-one to the plurality of heat dissipation blocks (22), the electrical conductors (31) on the first side surfaces of the respective ceramic sheets (30) corresponding one-to-one to the respective corresponding heat dissipation blocks (22) and being welded; There are a plurality of the power transistors (40), the plurality of power transistors (40) corresponding one-to-one to the plurality of ceramic sheets (30), each of the power transistors (40) corresponding one-to-one to the electrical conductor (31) on the second side surface of the corresponding ceramic sheet (30) and being welded.

4. The bridge pipe assembly according to claim 3, characterized in that, The radiators (20) are provided on both side surfaces of the liquid cooling bridge body (10), and a plurality of the ceramic sheets (30) and a plurality of the power transistors (40) are correspondingly provided for the radiators (20) on the same side.

5. The bridge pipe assembly according to claim 4, characterized in that, The number of the heat dissipation blocks (22) on the first side surface of the liquid cooling bridge body (10) is equal to the number of the heat dissipation blocks (22) on the second side surface of the liquid cooling bridge body (10), and the respective heat dissipation blocks (22) on both side surfaces of the liquid cooling bridge body (10) are symmetrically arranged.

6. The bridge pipe assembly according to claim 3, characterized in that, In the direction from the power transistor (40) to the liquid cooling bridge body (10), the projected area of the ceramic sheet (30) is larger than the projected area of the heat dissipation block (22), so that the area of the ceramic sheet (30) without the electrical conductor (31) is located at the heat dissipation plate (21) to increase the creepage distance between the power transistor (40) and the heat dissipation block (22).

7. The bridge tube assembly according to claim 3, wherein In the direction from the power transistor (40) to the liquid cooling bridge body (10), the projected shape of the electrical conductor (31) is adapted to the projected shape of the power transistor (40); and / or In the direction from the power transistor (40) to the liquid cooling bridge body (10), the projected shape of the heat dissipation block (22) is adapted to the projected shape of the power transistor (40); and / or In the direction from the power tube (40) to the liquid-cooled bridge body (10), the projected shape of the heat dissipation block (22) is adapted to the projected shape of the conductor (31).

8. The bridge pipe assembly according to claim 3, wherein The bridge tube assembly further includes: An insulation structure (50), the insulation structure (50) is clamped between the radiator (20) and the ceramic sheet (30), and the insulation structure (50) has an avoidance notch (53), and the avoidance notch (53) is used to avoid the heat dissipation block (22).

9. The bridge pipe assembly according to claim 8, characterized in that, The insulation structure (50) includes: A support sheet body (51), the support sheet body (51) extends along the arrangement direction of the plurality of heat dissipation blocks (22); A plurality of spacer sheet bodies (52), the plurality of spacer sheet bodies (52) are all connected to the same side of the support sheet body (51), so as to form the avoidance notch (53) between two adjacent spacer sheet bodies (52).

10. The bridge pipe assembly according to claim 8, characterized in that, The insulation structure (50) is an imide film.

11. A motor controller, characterized in that, It includes a bridge tube assembly, and the bridge tube assembly is the bridge tube assembly according to any one of claims 1 to 10.

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