Inverter

Abstract

The utility model relates to the technical field of automobile parts, and provides an inverter, comprising a preassembled circuit board assembly which comprises a main frame, and a circuit board and a power board which are respectively assembled at two sides of the main frame, the main frame is provided with a detachable PIN needle assembly, and the circuit board assembly is in communication connection through the PIN needle assembly; the shell is provided with a plurality of cooling channels sharing a heat exchange surface, and the circuit board assembly is accommodated in the shell and assembled with the shell through the main frame; the capacitor assembly is contained in the shell and is in communication connection with the power board, and the circuit board assembly and the capacitor assembly make contact with the cooling channels located on the two sides of the heat exchange face respectively. The inverter provided by the utility model is compact in overall structure and convenient to assemble, can adapt to different power boards and circuit boards, has super-strong setting flexibility, and can realize super-strong cooling.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive parts, and more specifically, to an inverter. Background Art

[0002] An in-vehicle inverter is used to convert the direct current output by a battery into alternating current with variable current and frequency to drive a motor to operate.

[0003] The current inverters have the following problems:

[0004] The housing of the inverter requires components such as an integrated circuit board, a power board, a cooling device, and a capacitor, resulting in a relatively large overall volume of the inverter, and thus miniaturization design is needed.

[0005] Inverters with different functions require different circuit boards and power boards, and changes in the structures of the circuit boards and power boards require overall changes in components such as the housing to achieve smooth assembly.

[0006] During the operation of the inverter, a large amount of heat is generated, and it is difficult for the cooling device to balance a compact structure design and comprehensive cooling of components with large heat generation, such as the circuit board, the power board, and the capacitor.

[0007] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present utility model, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0008] In view of this, the present utility model provides an inverter, which has a compact structure, is convenient for assembly, can adapt to different power boards and circuit boards, has strong setting flexibility, and can achieve super cooling.

[0009] According to one aspect of the present utility model, there is provided an inverter, comprising: a pre-assembled circuit board assembly, including a main frame and a circuit board and a power board respectively assembled on both sides of the main frame, wherein a detachable PIN pin assembly is provided on the main frame, and the circuit board assembly is communicatively connected through the PIN pin assembly; a housing, provided with a plurality of cooling channels sharing a heat exchange surface, wherein the circuit board assembly is accommodated in the housing and assembled with the housing through the main frame; and a capacitor assembly, accommodated in the housing and communicatively connected with the power board, wherein the circuit board assembly and the capacitor assembly respectively contact the cooling channels located on both sides of the heat exchange surface.

[0010] In some embodiments, the power board is provided with a plurality of chip-embedded power modules, and each chip-embedded power module is provided with one or more semiconductor chips; the circuit board is any one of a chip-on-board packaging circuit board, a printed circuit board, and a control and drive circuit board.

[0011] In some embodiments, the inverter further includes: a heat dissipation plate, which is accommodated in the housing and located between the power board and the corresponding cooling channel, and the heat dissipation plate is in contact with the power board through a heat-conducting medium.

[0012] In some embodiments, the heat dissipation plate and the circuit board assembly are tightly connected through a bolt assembly; the edge of the main frame is welded to the housing.

[0013] In some embodiments, the cooling channel includes: an oil cooling channel, which is arranged on one side of the heat exchange surface facing the circuit board assembly; a water cooling channel, which is arranged on one side of the heat exchange surface facing the capacitor assembly; wherein, heat dissipation fin needles are arranged in both the oil cooling channel and the water cooling channel.

[0014] In some embodiments, the heat exchange surface is provided with an inlet hole and an outlet hole; when the inlet hole and the outlet hole are closed, the oil cooling channel is isolated from the water cooling channel; when the inlet hole and / or the outlet hole is opened, the oil cooling channel is communicated with the water cooling channel.

[0015] In some embodiments, the inverter further includes: a DC input assembly, which is assembled with the housing and connected to the power board, and the DC input assembly includes a high-voltage DC input terminal, a DC filter, and a low-voltage DC input terminal; an AC output assembly, which is connected to the power board and includes an AC filter and an AC output terminal arranged on the main frame.

[0016] In some embodiments, the high-voltage DC input terminal and the low-voltage DC input terminal are arranged outside the housing, and an outlet hole for leading out the AC output terminal is provided on the side wall of the housing; a filter assembly area is reserved inside the housing, and the DC filter and the AC filter are arranged in the filter assembly area.

[0017] In some embodiments, the capacitor assembly is accommodated in an insulating box and assembled with the housing through the insulating box; wherein, a slot hole is provided on the housing, and the wiring terminal of the capacitor assembly passes through the slot hole and is connected to the power board.

[0018] In some embodiments, the inverter further includes: a cover plate, which is arranged on one side of the capacitor assembly and assembled with the housing; wherein, the surface of the cover plate is stamped into a shape that fits the capacitor assembly.

[0019] The beneficial effects of the present utility model compared with the prior art at least include:

[0020] Through the main frame, a unified assembly interface for the circuit board and the power board is provided. Different circuit boards and different power boards can be stably and conveniently assembled through the main frame without changing the structures of device components such as the housing. A detachable PIN pin assembly is arranged on the main frame, and the PIN pin assembly can be adjusted according to different circuit boards / different power boards to achieve communication connection. Moreover, the power board, the main frame, and the circuit board are pre-assembled to achieve high integration and simplify the assembly of the inverter.

[0021] Through a plurality of cooling channels provided in the housing and sharing a heat exchange surface, on the one hand, a compact cooling structure design is realized. On the other hand, through the layout mode that the circuit board assembly and the capacitor assembly respectively contact the cooling channels on both sides of the heat exchange surface, devices with large heat generation such as the circuit board, the power board, and the capacitor assembly are comprehensively cooled. The plurality of cooling channels perform heat exchange through the heat exchange surface, effectively enhancing the heat exchange capacity and improving the cooling effect. Moreover, each cooling channel can be filled with an insulating cooling medium as needed, conduct heat in a cycle with the outside, etc., and the cooling design is flexible.

[0022] In summary, the inverter of the present utility model has a compact overall structure and convenient assembly, can adapt to different power boards and circuit boards, has extremely strong setting flexibility, and can achieve extremely strong cooling.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. Brief Description of the Drawings

[0024] The drawings here are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present utility model, and are used together with the specification to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Showing a schematic assembly structure diagram of the inverter in an embodiment of the present utility model;

[0026] Figure 2 And Figure 3 Showing an exploded structure diagram of the inverter in an embodiment of the present utility model;

[0027] Figure 4 Showing a three-dimensional structure diagram of the housing in an embodiment of the present utility model;

[0028] Figure 5 Showing a cross-sectional structure diagram of the inverter in an embodiment of the present utility model. Detailed Description of the Embodiment

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided so that this utility model will be more complete and comprehensive, and the concept of the example embodiments will be fully conveyed to those skilled in the art.

[0030] The accompanying drawings are only schematic illustrations of this utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0031] In the description of this utility model, "a plurality of" means two or more unless otherwise specifically defined. In addition, in the description of this utility model, when it is said that a device is "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.

[0032] It should be noted that, without conflict, the embodiments of this utility model and the features in different embodiments can be combined with each other.

[0033] Figure 1 Schematically shows the assembled structure of the inverter, Figure 2 and Figure 3 Schematically shows the exploded structure of the inverter, where Figure 3 only schematically shows the main structural components of the inverter, Figure 4 Schematically shows the three-dimensional structure of the housing, Figure 5 Schematically shows the sectional structure of the inverter; in combination with Figures 1 to 5 as shown, the inverter provided by the embodiment of this utility model includes:

[0034] A pre-assembled circuit board assembly, including a main frame 10 and circuit boards 20 and power boards 30 respectively assembled on both sides of the main frame 10. A detachable PIN pin assembly 11 is provided on the main frame 10, and the circuit board assembly is communicatively connected through the PIN pin assembly 11;

[0035] A housing 40, provided with a plurality of cooling channels 42 having a common heat exchange surface 44. The circuit board assembly is accommodated in the housing 40 and is assembled with the housing 40 through the main frame 10;

[0036] A capacitor assembly 50, accommodated in the housing 40 and communicatively connected to the power board 30. The circuit board assembly and the capacitor assembly 50 respectively contact the cooling channels 42 on both sides of the heat exchange surface 44.

[0037] The power board 30 is used to convert the input direct current into alternating current. The circuit board 20 is communicatively connected to the power board 30 through the main frame 10 and is used to control the operation of the power board 30 to manage the power conversion process. The capacitor assembly 50 is used to balance and stabilize the circuit voltage.

[0038] Through the main frame 10, a unified assembly interface for the circuit board 20 and the power board 30 is provided. Different circuit boards 20 and different power boards 30 can be stably and conveniently assembled through the main frame 10 without changing the device component structures such as the housing 40. A detachable PIN pin assembly 11 is provided on the main frame 10, and the PIN pin assembly 11 can be adjusted according to different circuit boards 20 / different power boards 30 to achieve communicative connection. Moreover, the power board 30, the main frame 10, and the circuit board 20 are pre-assembled to achieve high integration and simplify the assembly of the inverter.

[0039] Through the multiple cooling channels 42 of the common heat exchange surface 44 provided by the housing 40, on the one hand, a compact cooling structure design is realized. On the other hand, through the layout mode that the circuit board assembly and the capacitor assembly 50 are respectively in contact with the cooling channels 42 on both sides of the heat exchange surface 44, devices with large heat generation such as the circuit board 20, the power board 30, and the capacitor assembly 50 are comprehensively cooled. The multiple cooling channels 42 perform heat exchange through the heat exchange surface 44, effectively enhancing the heat exchange capacity and improving the cooling effect. Moreover, each cooling channel 42 can be filled with an insulating cooling medium as needed, conduct heat in a cycle with the outside, etc., and the cooling design is flexible.

[0040] Therefore, the inverter of the present utility model has a compact overall structure and is convenient to assemble, can adapt to different power boards 30 and circuit boards 20, has super setting flexibility, and can achieve super cooling.

[0041] In some embodiments, the power board 30 is provided with multiple chip-embedded power modules 33, and each chip-embedded power module 33 is provided with one or more semiconductor chips. The semiconductor chips are, for example, SiC chips, Si chips, etc. The circuit board 20 is any one of a chip-on-board (CoB) circuit board, a printed circuit board (PB), and a control and drive circuit board (CCDB).

[0042] Through the unified assembly interface provided by the main frame 10, circuit boards 20 and power boards 30 with different types, different functions, and different layouts can be stably and conveniently assembled.

[0043] In some embodiments, the inverter further includes: a heat dissipation plate 60, which is accommodated in the housing 40 and is located between the power board 30 and the corresponding cooling channel 42, and the heat dissipation plate 60 is in contact with the power board 30 through a heat-conducting medium.

[0044] Both sides of the heat dissipation plate 60 can be respectively designed into a structure that fits and contacts the power board 30 and the corresponding cooling channel 42, and a heat-conducting medium such as heat-conducting glue is filled between the heat dissipation plate 60 and the power board 30, so as to effectively dissipate the heat of the power board 30.

[0045] In some embodiments, the heat dissipation plate 60 and the circuit board assembly are fixedly connected by a bolt assembly 66; the edge of the main frame 10 is welded to the housing 40. In this way, a stable assembly between the components on one side of the housing 40 and the housing 40 is achieved.

[0046] In some embodiments, the cooling channel 42 includes: an oil cooling channel 42a provided on the side of the heat exchange surface 44 facing the circuit board assembly; a water cooling channel 42b provided on the side of the heat exchange surface 44 facing the capacitor assembly 50; wherein, heat dissipation fin needles 420 are provided in both the oil cooling channel 42a and the water cooling channel 42b.

[0047] An insulating cooling medium can be introduced into the oil cooling channel 42a to cool the circuit board assembly through the oil cooling channel 42a, avoiding the problem of electrical conduction. Coolant can pass through the water cooling channel 42b to achieve active and efficient cooling of the capacitor assembly 50. Through the heat dissipation fin needles 420, the contact area with the cooling medium is increased, the heat exchange capacity is enhanced, and the cooling effect is improved.

[0048] To ensure insulation cooling, the cooling medium in the oil cooling channel 42a can only participate in the circulation of the motor cooling system; according to different design requirements, the cooling medium in the oil cooling channel 42a can also participate in the circulation of the vehicle cooling system. The cooling medium in the water cooling channel 42b can participate in the circulation of the vehicle cooling system. The cooling medium in the water cooling channel 42b not only cools the capacitor assembly 50, but also cools the cooling medium in the oil cooling channel 42a through the heat exchange surface 44, ensuring the cooling effect on the circuit board assembly and making full use of the vehicle interior cooling conditions.

[0049] The inlet and outlet pipelines 422 of the oil cooling channel 42a and the inlet and outlet pipelines of the water cooling channel 42b are respectively connected to the side wall of the housing 40. According to different cooling requirements, the cooling media in the oil cooling channel 42a and the water cooling channel 42b can be interchanged or interconnected.

[0050] In some embodiments, the heat exchange surface 44 is provided with an inlet hole and an outlet hole (not specifically shown in the figure); when the inlet hole and the outlet hole are closed, the oil cooling channel 42a is isolated from the water cooling channel 42b; when the inlet hole and / or the outlet hole is opened, the oil cooling channel 42a is communicated with the water cooling channel 42b. In this way, different cooling scenario requirements can be met.

[0051] In some embodiments, the inverter further includes: a DC input component, which is assembled with the housing 40 and connected to the power board 30. The DC input component includes a high-voltage DC input terminal 72, a DC filter 73, and a low-voltage DC input terminal 74; an AC output component, which is connected to the power board 30 and includes an AC filter 82 and an AC output terminal 83 provided on the main frame 10.

[0052] The DC input component is used to connect to the vehicle's battery, and the AC output component is used to connect to the motor. Through the inverter, the direct current provided by the battery is converted into alternating current for driving the motor to operate.

[0053] In some embodiments, the high-voltage DC input terminal 72 and the low-voltage DC input terminal 74 are provided outside the housing 40, and the side wall of the housing 40 is provided with an outlet hole 830 for leading out the AC output terminal 83; in this way, it is convenient to connect the inverter to the battery and the motor. Further, a filter assembly area 400 is reserved inside the housing 40, and the DC filter 73 and the AC filter 82 are arranged in the filter assembly area 400; in this way, a compact and reasonable layout of devices such as the DC filter 73, the AC filter 82, the circuit board assembly, and the capacitor assembly 50 in the housing 40 is realized.

[0054] In some embodiments, the capacitor assembly 50 is accommodated in an insulating box and assembled with the housing 40 through the insulating box; wherein, the housing 40 is provided with a slot hole, and the wiring terminal of the capacitor assembly 50 passes through the slot hole and is connected to the power board 30.

[0055] Through the insulating box, insulation protection for the capacitor assembly 50 is realized. The housing 40 can be a metal housing such as an aluminum part, and an insulating layer is provided on the peripheral wall of the slot hole. The wiring terminal of the capacitor assembly 50 passes through the slot hole to achieve a reliable connection with the power board 30.

[0056] In some embodiments, the inverter further includes: a cover plate 90, which is provided on one side of the capacitor assembly 50 and assembled with the housing 40; the cover plate 90 can be assembled with the housing 40 through a bolt member 92. Further, the surface of the cover plate 90 is stamped into a shape that fits the capacitor assembly 50, so as to realize the compact overall shape of the inverter and cover and protect the capacitor assembly 50.

[0057] In summary, the inverter of the present utility model has the following beneficial effects:

[0058] Through the power board 30, DC-AC conversion is performed. Through the circuit board 20, the operation of the power board 30 is controlled and the power conversion process is managed. Through the capacitor assembly 50, the circuit voltage is balanced and stabilized, so as to realize the conversion of the direct current provided by the battery into alternating current for driving the motor to operate stably.

[0059] The main frame 10 provides a unified assembly interface for the circuit board 20 and the power board 30. Different circuit boards 20 and different power boards 30 can be stably and conveniently assembled through the main frame 10 without changing the device component structures such as the housing 40. A detachable PIN pin assembly 11 is provided on the main frame 10, and the PIN pin assembly 11 can be adjusted according to different circuit boards 20 / different power boards 30 to achieve communication connection. Moreover, the power board 30, the main frame 10, and the circuit board 20 are pre-assembled to achieve high integration and simplify the assembly of the inverter.

[0060] Through the multiple cooling channels 42 of the common heat exchange surface 44 provided by the housing 40, on the one hand, a compact cooling structure design is realized. On the other hand, through the layout method that the circuit board assembly and the capacitor assembly 50 respectively contact the cooling channels 42 on both sides of the heat exchange surface 44, the devices with large heat generation such as the circuit board 20, the power board 30, and the capacitor assembly 50 are comprehensively cooled. The multiple cooling channels 42 perform heat exchange through the heat exchange surface 44, effectively enhancing the heat exchange capacity and improving the cooling effect. Moreover, each cooling channel 42 can be filled with an insulating cooling medium as needed, conduct heat in a cycle with the outside world, etc., and the cooling design is flexible.

[0061] The inverter of the present utility model has a compact overall structure and convenient assembly, can adapt to different power boards 30 and circuit boards 20, has extremely strong setting flexibility, and can achieve extremely strong cooling.

[0062] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. An inverter, characterized in that: include: A preassembled circuit board assembly comprises a main frame and a circuit board and a power board respectively assembled on both sides of the main frame, wherein a detachable PIN needle assembly is arranged on the main frame, and the circuit board assembly is communicatively connected via the PIN needle assembly; A shell body provided with a plurality of cooling channels sharing a common heat exchange surface, wherein the circuit board assembly is accommodated in the shell body and assembled with the shell body through the main frame; A capacitor assembly is accommodated in the housing and is communicatively connected with the power board. The circuit board assembly and the capacitor assembly are respectively in contact with cooling channels located on both sides of the heat exchange surface.

2. The inverter according to claim 1, characterized in that: The power board is provided with a plurality of chip-embedded power modules, and each chip-embedded power module is provided with one or more semiconductor chips; The circuit board is any one of a chip-on-board packaging circuit board, a printed circuit board, a control and drive circuit board.

3. The inverter according to claim 1, characterized in that: Also includes: The heat dissipation plate is accommodated in the housing and is located between the power plate and the corresponding cooling channel. The heat dissipation plate is in contact with the power plate through a heat-conducting medium.

4. The inverter according to claim 3, characterized in that: The heat sink and the circuit board assembly are fastened and connected via a bolt assembly; The edge of the main frame is welded to the shell.

5. The inverter according to claim 1, characterized in that: The cooling channel comprises: An oil cooling channel is provided on a side of the heat exchange surface facing the circuit board assembly; A water cooling channel is provided on a side of the heat exchange surface facing the capacitor assembly; Wherein, heat dissipation fins are arranged in both the oil cooling channel and the water cooling channel.

6. The inverter according to claim 5, characterized in that: The heat exchange surface is provided with an inlet hole and an outlet hole; When the inlet hole and the outlet hole are closed, the oil cooling channel is isolated from the water cooling channel; When the inlet hole and / or the outlet hole is opened, the oil cooling channel is communicated with the water cooling channel.

7. The inverter according to claim 1, characterized in that: Also includes: A DC input component, assembled with the housing and connected to the power board, the DC input component comprising a high-voltage DC input terminal, a DC filter and a low-voltage DC input terminal; The AC output component is connected to the power board and comprises an AC filter and an AC output terminal arranged on the main frame.

8. The inverter according to claim 7, characterized in that: The high-voltage DC input terminal and the low-voltage DC input terminal are arranged outside the shell, and the side wall of the shell is provided with a lead-out hole for leading out the AC output terminal; A filter assembly area is reserved in the shell, and the DC filter and the AC filter are arranged in the filter assembly area.

9. The inverter according to claim 1, characterized in that: The capacitor assembly is accommodated in an insulating box and assembled with the housing through the insulating box; The shell is provided with a slot, and the connection terminal of the capacitor assembly passes through the slot to be connected to the power board.

10. The inverter according to claim 1, characterized in that: Also includes: A cover plate, arranged on one side of the capacitor assembly and assembled with the housing; Wherein, the surface of the cover plate is stamped into a shape that fits the capacitor assembly.

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