CN215819152U

CN215819152U - High-integration-level vehicle-mounted inverter core structure

Info

Publication number: CN215819152U
Application number: CN202121242933.3U
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: 2022-02-11
Anticipated expiration: 2031-06-04

Abstract

The utility model discloses a high-integration-level vehicle-mounted inverter core 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. According to the high-integration-level vehicle-mounted inverter core structure disclosed by the utility model, after the thin-film capacitor and the direct-current copper bar are welded and fixed, the thin-film capacitor and the direct-current copper bar are integrated on the water-cooling substrate in an epoxy glue filling and sealing mode to form a module, and the high-integration-level vehicle-mounted inverter core structure has the advantages of high integration level, miniaturization, low cost and the like.

Description

High-integration-level vehicle-mounted inverter core structure

Technical Field

The utility model belongs to the technical field of vehicle-mounted inverter cores, and particularly relates to a high-integration-level vehicle-mounted inverter core structure.

Background

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

The common inverter main body topological structure (inverter core) is composed 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 seat, a heat conduction phase change material and a metal water-cooling substrate, and the inverter main body topological structure (inverter core) is mechanically connected to form a whole.

The main structure of a common inverter is shown in fig. 2, and a plurality of single parts are connected in a simple mechanical mode, so that the problems of insufficient modularization and the like exist, and the requirements of high integration level and flexible sample supply of a finished automobile power assembly cannot be met.

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

Therefore, the above problems are further improved.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a high-integration-level vehicle-mounted inverter core structure, wherein a film capacitor and a direct-current copper bar are welded and fixed and then integrated on a water-cooling substrate to form a module in an epoxy glue filling and sealing mode; 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 water-cooling substrate integrated module which is integrated and encapsulated through the bolts, the circuit board module is fixedly welded or crimped on the power module, and the circuit board module is fastened to the alternating current copper bar integrated module through the screws.

In order to achieve the above object, the present invention provides a high-integration vehicle-mounted inverter core structure, which includes 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 to the water-cooling substrate integrated module, and one end of the ac copper bar integrated module, which is far away from the water-cooling substrate integrated module, is fixedly connected to 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 welded and then are arranged in the placing groove part (integrated in an epoxy glue filling and sealing mode);

exchange copper bar collection moulding piece includes (a plurality of, preferably 3) current detection magnetic core and exchanges the copper bar, the current detection magnetic core with exchange copper bar fixed connection (carry out the integration through moulding plastics).

As a further preferable technical solution of the above technical solution, the current detection magnetic core includes 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 to the ac copper bar;

the first magnetic core is provided with a first insertion slot portion, the second magnetic core is provided with a second insertion slot portion, and the third magnetic core is provided with a third insertion slot portion (a current sensor is formed by placing a detection chip in each insertion slot portion).

As a further preferable technical solution of the above technical solution, 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 solution of the above technical solution, 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 solution of the above technical solution, 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 utility model has the beneficial effects that:

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

2) compared with the traditional scheme, the scheme of the utility model directly integrates the thin-film capacitor into the water cooling plate, and adopts the epoxy glue filling and sealing process, so that the parts such as the shell of the capacitor, the heat-conducting phase-change material, the direct-current connecting 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 mostly adopted, the adoption of screw connection is reduced as much as possible, the cost of parts and production process is reduced, and the integral structural reliability is improved;

5) considering the heat dissipation of the IGBT of the core power module, the inversion core directly integrates the water channel structure, the heat dissipation scheme of the IGBT is optimized, the external assembly is facilitated, and meanwhile the heat dissipation consistency and effectiveness of the IGBT are guaranteed.

Drawings

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

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

The reference numerals include: 10. a thin film capacitor; 20. water-cooling the substrate; 21. a first groove portion; 22. a second groove portion; 23. a third groove portion; 24. a fourth groove portion; 25. a fifth groove section; 26. a sixth groove portion; 30. a direct current copper bar; 40. alternating current 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 cell; 62. a second IGBT cell; 63. a third IGBT cell; 70. and a circuit board module.

Detailed Description

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the utility model, as 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 utility model.

The utility model discloses a high-integration vehicle-mounted inversion core structure, and the specific embodiment of the utility model is further described below by combining the preferred embodiment.

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

Preferred embodiments.

The utility model discloses a high-integration vehicle-mounted inverter core 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, one end of the alternating current copper bar integrated module, which is far away from the water-cooling substrate integrated module, is fixedly connected with the circuit board module 70, and the alternating current copper bar integrated module comprises:

the water-cooling substrate integrated module comprises a thin 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 thin film capacitor 10 and the direct current copper bar 30 are welded and then are arranged in the placing groove part (integrated in an epoxy glue filling and sealing mode);

exchange copper bar collection moulding piece includes (a plurality of, preferably 3) current detection magnetic core and exchanges copper bar 40, the current detection magnetic core with exchange copper bar 40 fixed connection (carry out the integration through moulding plastics).

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

the first magnetic core 51 is provided with a first insertion groove 54, the second magnetic core 52 is provided with a second insertion groove 55, and the third magnetic core 53 is provided with a third insertion groove 56 (a current sensor is configured 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 placed in the first groove portion 21, the second magnetic core 52 is placed in the second groove portion 22, and the third magnetic core 53 is placed 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, and the first IGBT unit 61, the second IGBT unit 62, and the third IGBT unit 63 are respectively electrically connected to the circuit board module (provided with an integrated water channel structure, facilitating heat dissipation).

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

It should be noted that the technical features of the detection chip, the circuit board module and the like related to the patent application of the present invention should be regarded as the prior art, and the specific structure, the operation principle, the control mode and the spatial arrangement mode of the technical features may be selected conventionally in the field, and should not be regarded as the utility model point of the patent of the present invention, and the patent of the present invention is not further specifically described in detail.

It will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a high integration level vehicle-mounted contravariant nuclear structure, its characterized in that, includes water-cooling base plate collection moulding piece, exchanges copper bar collection moulding piece, power module and circuit board module, exchange copper bar collection moulding piece with power module equally divide do not with water-cooling base plate collection moulding piece fixed connection, it keeps away from to exchange copper bar collection moulding piece water-cooling base plate collection moulding piece'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 welded and then are arranged in the placing groove part;

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.

2. The vehicle-mounted inverter core structure with high integration according to claim 1, wherein 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;

first magnetic core is equipped with the first slot part that inserts, the second magnetic core is equipped with the second and inserts the slot part, the third magnetic core is equipped with the third and inserts the slot part.

3. The high-integration vehicle-mounted inverter core structure according to claim 2, wherein the water-cooled substrate further comprises a first groove portion, a second groove portion and a third groove portion, the first magnetic core is disposed in the first groove portion, the second magnetic core is disposed in the second groove portion, and the third magnetic core is disposed in the third groove portion.

4. The vehicle-mounted inverter core structure with high integration according to claim 3, wherein 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 electrically connected with the circuit board module respectively.

5. The high-integration vehicle-mounted inverter core structure according to claim 4, wherein the water-cooled substrate further comprises a fourth groove portion, a fifth groove portion and a sixth groove portion, the first IGBT unit is disposed in the fourth groove portion, the second IGBT unit is disposed in the fifth groove portion, and the third IGBT unit is disposed in the sixth groove portion.