CN113412027B

CN113412027B - High-integration vehicle-mounted inversion nuclear structure

Info

Publication number: CN113412027B
Application number: CN202110624667.9A
Authority: CN
Inventors: 沈阳
Original assignee: Zhejiang Yikong Power System Co ltd
Current assignee: Zhejiang Yikong Power System Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2024-09-27
Anticipated expiration: 2041-06-04
Also published as: CN113412027A

Abstract

The invention discloses a high-integration vehicle-mounted inversion nuclear structure which comprises a water-cooling substrate integrated module, an alternating current copper bar integrated module, a power module and a circuit board module, wherein the alternating current copper bar integrated module and the power module are respectively and fixedly connected with the water-cooling substrate integrated module, and one end, far away from the water-cooling substrate integrated module, of the alternating current copper bar integrated module is fixedly connected with the circuit board module. The high-integration vehicle-mounted inversion nuclear structure disclosed by the invention has the advantages of high integration level, miniaturization, low cost and the like, and the thin film capacitor and the direct current copper bar are integrated on the water-cooling substrate in a manner of encapsulating epoxy glue after being welded and fixed.

Description

High-integration vehicle-mounted inversion nuclear structure

Technical Field

The invention belongs to the technical field of vehicle-mounted inversion cores, and particularly relates to a high-integration vehicle-mounted inversion core structure.

Background

In the fields of industrial frequency conversion, electric transmission and new energy automobiles, the inverter can realize the functions of direct current input, direct current-alternating current conversion and current detection, and finally outputs an alternating current driving motor to provide power for industrial control equipment or the whole automobile.

The common main body topological structure (inversion core) of the inverter consists of a direct current connection copper bar, a thin film capacitor, an Insulated Gate Bipolar Transistor (IGBT), a current sensor, a circuit board (PCBA), an insulating base, a heat conduction phase change material and a metal water cooling substrate, and the main body topological structure is integrally formed through mechanical connection.

As shown in fig. 2, the main structure of the common inverter is connected by a simple mechanical manner by adopting a plurality of single parts, so that the problems of insufficient modularization and the like exist, and the requirements of high integration level and flexible sample supply of the whole vehicle power assembly can not be met.

Furthermore, common inverter solutions have the disadvantages: the cost is very high; the space utilization rate is low; the long-term use reliability is insufficient; packaging, protection and logistics management and control of the parts are difficult.

Accordingly, the above problems are further improved.

Disclosure of Invention

The invention mainly aims to provide a high-integration vehicle-mounted inversion nuclear structure, which is characterized in that a thin film capacitor and a direct current copper bar are integrated on a water-cooling substrate in a manner of epoxy glue encapsulation to form a module after being welded and fixed; the current detection magnetic core and the alternating current copper bar form an alternating current copper bar integrated module in an injection molding mode; the power module and the alternating current copper bar integrated module are fixed on the integrated encapsulated water-cooled substrate integrated module through bolts, the circuit board module is fixedly welded or crimped on the power module, and the circuit board module is fastened on the alternating current copper bar integrated module through bolts, so that the integrated circuit board module has the advantages of high integration level, miniaturization, low cost and the like.

In order to achieve the above objective, the present invention provides a high-integration vehicle-mounted inversion nuclear structure, which comprises a water-cooling substrate integrated module, an ac copper bar integrated module, a power module and a circuit board module (PCBA board), wherein the ac copper bar integrated module and the power module are respectively and fixedly connected with the water-cooling substrate integrated module, and one end of the ac copper bar integrated module far away from the water-cooling substrate integrated module is fixedly connected with the circuit board module, wherein:

The water-cooling substrate integrated module comprises a film capacitor, a water-cooling substrate and a direct-current copper bar, wherein the water-cooling substrate is provided with a placing groove part, and the film capacitor and the direct-current copper bar are arranged in the placing groove part after being welded (integrated in a manner of encapsulating epoxy glue);

The alternating current copper bar integrated module comprises (a plurality of, preferably 3) current detection magnetic cores and alternating current copper bars, wherein the current detection magnetic cores are fixedly connected with the alternating current copper bars (integrated through injection molding).

As a further preferable technical solution of the above technical solution, the current detecting magnetic core includes a first magnetic core, a second magnetic core, and a third magnetic core, where the first magnetic core, the second magnetic core, and the third magnetic core are fixedly connected with the ac copper bar, respectively;

The first magnetic core is provided with a first insertion groove part, the second magnetic core is provided with a second insertion groove part, and the third magnetic core is provided with a third insertion groove part (a detection chip is placed in each insertion groove part to form a current sensor).

As a further preferable technical scheme of the above technical scheme, the water-cooled substrate is further provided with a first groove portion, a second groove portion and a third groove portion, the first magnetic core is placed in the first groove portion, the second magnetic core is placed in the second groove portion, and the third magnetic core is placed in the third groove portion.

As a further preferable technical scheme of the above technical scheme, the power module includes a first IGBT unit, a second IGBT unit, and a third IGBT unit, and the first IGBT unit, the second IGBT unit, and the third IGBT unit are electrically connected to the circuit board module, respectively.

As a further preferable technical scheme of the above technical scheme, the water-cooled substrate is further provided with a fourth groove portion, a fifth groove portion and a sixth groove portion, the first IGBT unit is placed in the fourth groove portion, the second IGBT unit is placed in the fifth groove portion, and the third IGBT unit is placed in the sixth groove portion.

The invention has the beneficial effects that:

1) Compared with the scheme, the scheme of the invention adopts a more integrated mode to reduce the volume of the original inversion nuclear scheme, the volume of the original assembly scheme is 4.02L, the volume of the optimized high-integration inversion nuclear is 2.68L, and the volume is reduced by about 33.33%;

2) Compared with the traditional scheme, the thin film capacitor is directly integrated into the water cooling plate, and the epoxy glue filling and sealing process is adopted, so that the parts such as a shell of the capacitor, a heat-conducting phase-change material, a direct-current connection copper bar and the like are saved, and the overall cost is reduced by about 10%;

3) The structure is compact, the space utilization rate is high, the design is simple, and the external matching compatibility is good;

4) The processes of welding, filling and sealing, integral injection molding and the like are adopted, so that the screw connection is reduced as much as possible, the cost of parts and production processes is reduced, and the integral structural reliability is improved;

5) Considering the heat dissipation of the core power module IGBT, the inversion core directly integrates a water channel structure, optimizes the heat dissipation scheme of the IGBT, and ensures the heat dissipation consistency and effectiveness of the IGBT while being convenient for external assembly.

Drawings

Fig. 1 is a schematic structural diagram of a high-integration vehicle-mounted inversion core structure of the present invention.

Fig. 2 is a schematic diagram of a conventional inverter core structure.

The reference numerals include: 10. a thin film capacitor; 20. a water-cooling base plate; 21. a first groove portion; 22. a second groove portion; 23. a third groove portion; 24. a fourth groove portion; 25. a fifth groove portion; 26. a sixth groove portion; 30. direct current copper bars; 40. exchanging copper bars; 51. a first magnetic core; 52. a second magnetic core; 53. a third magnetic core; 54. a first insertion groove portion; 55. a second insertion groove portion; 56. a third insertion groove portion; 61. a first IGBT unit; 62. a second IGBT unit; 63. a third IGBT unit; 70. and a circuit board module.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

The invention discloses a high-integration vehicle-mounted inversion core structure, and the specific embodiment of the invention is further described below with reference to the preferred embodiment.

In the embodiments of the present invention, those skilled in the art will note that the detection chip and the circuit board module, etc. to which the present invention relates may be regarded as the prior art.

Preferred embodiments.

The invention discloses a high-integration vehicle-mounted inversion nuclear structure, which comprises a water-cooling substrate integrated module, an alternating current copper bar integrated module, a power module and a circuit board module 70 (PCBA board), wherein the alternating current copper bar integrated module and the power module are respectively and fixedly connected with the water-cooling substrate integrated module, and one end, far away from the water-cooling substrate integrated module, of the alternating current copper bar integrated module is fixedly connected with the circuit board module 70, wherein:

The water-cooling substrate integrated module comprises a film capacitor 10, a water-cooling substrate 20 and a direct-current copper bar 30, wherein the water-cooling substrate 20 is provided with a placing groove part, and the film capacitor 10 and the direct-current copper bar 30 are welded and then are internally arranged in the placing groove part (integrated in a manner of encapsulating epoxy glue);

the ac copper bar integrated module comprises (a plurality of, preferably 3) current detection magnetic cores and ac copper bars 40, and the current detection magnetic cores and the ac copper bars 40 are fixedly connected (integrated by injection molding).

Specifically, the current detecting magnetic core includes a first magnetic core 51, a second magnetic core 52, and a third magnetic core 53, where the first magnetic core 51, the second magnetic core 52, and the third magnetic core 53 are fixedly connected with the ac copper bar 40 respectively;

The first core 51 is provided with a first insertion groove 54, the second core 52 is provided with a second insertion groove 55, and the third core 53 is provided with a third insertion groove 56 (a current sensor is formed by placing a detection chip in each insertion groove).

More specifically, the water-cooled substrate 20 is further provided with a first groove portion 21, a second groove portion 22, and a third groove portion 23, the first magnetic core 51 is disposed in the first groove portion 21, the second magnetic core 52 is disposed in the second groove portion 22, and the third magnetic core 53 is disposed in the third groove portion 23.

Further, the power module includes a first IGBT unit 61, a second IGBT unit 62, and a third IGBT unit 63, where the first IGBT unit 61, the second IGBT unit 62, and the third IGBT unit 63 are electrically connected to the circuit board module (provided with an integrated water channel structure, so as to facilitate heat dissipation).

Further, the water-cooled substrate 20 is further provided with a fourth groove portion 24, a fifth groove portion 25 and a sixth groove portion 26, the first IGBT cell 61 is placed in the fourth groove portion 24, the second IGBT cell 62 is placed in the fifth groove portion 25, and the third IGBT cell 63 is placed in the sixth groove portion 26.

It should be noted that technical features such as a detection chip and a circuit board module related to the present application should be regarded as the prior art, and specific structures, working principles, and control modes and spatial arrangement modes possibly related to the technical features should be selected conventionally in the art, and should not be regarded as the invention point of the present application, which is not further specifically described in detail.

Modifications of the embodiments described above, or equivalents of some of the features may be made by those skilled in the art, and any modifications, equivalents, improvements or etc. within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a high integration degree on-vehicle contravariant nuclear structure, its characterized in that includes water-cooling base plate integrated module, exchanges copper bar integrated module, power module and circuit board module, exchange copper bar integrated module with power module all respectively with water-cooling base plate integrated module fixed connection, exchange copper bar integrated module keep away from water-cooling base plate integrated module's one end with circuit board module fixed connection, wherein:

The water-cooling substrate integrated module comprises a film capacitor, a water-cooling substrate and a direct-current copper bar, wherein the water-cooling substrate is provided with a placing groove part, and the film capacitor and the direct-current copper bar are arranged in the placing groove part after being welded;

The alternating current copper bar integrated module comprises a current detection magnetic core and an alternating current copper bar, and the current detection magnetic core is fixedly connected with the alternating current copper bar;

The power module comprises a first IGBT unit, a second IGBT unit and a third IGBT unit, and the first IGBT unit, the second IGBT unit and the third IGBT unit are respectively and electrically connected with the circuit board module;

The water-cooling substrate is further provided with a fourth groove part, a fifth groove part and a sixth groove part, the first IGBT unit is arranged in the fourth groove part, the second IGBT unit is arranged in the fifth groove part, and the third IGBT unit is arranged in the sixth groove part;

The current detection magnetic core comprises a first magnetic core, a second magnetic core and a third magnetic core, and the first magnetic core, the second magnetic core and the third magnetic core are respectively and fixedly connected with the alternating current copper bar;

The first magnetic core is provided with a first insertion groove part, the second magnetic core is provided with a second insertion groove part, and the third magnetic core is provided with a third insertion groove part;

The water-cooling substrate is further provided with a first groove part, a second groove part and a third groove part, the first magnetic core is arranged on the first groove part, the second magnetic core is arranged on the second groove part, and the third magnetic core is arranged on the third groove part.