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CN-113571922-B - Power electronic device and manufacturing method thereof

CN113571922BCN 113571922 BCN113571922 BCN 113571922BCN-113571922-B

Abstract

A power electronic device and a method for producing the same are proposed, the power electronic device having a power converter module, the power converter module comprising a switching device and a first and a second DC voltage terminal element, the switching device having a substrate with a first and a second DC voltage conductor track, the first and the second DC voltage terminal element being connected to the first and the second DC voltage conductor track in an electrically conductive manner with a correct polarity, and the device having a first and a second DC voltage connection element, wherein the first DC voltage terminal element is connected to the first DC voltage connection element in an electrically conductive manner with a correct polarity by means of a first connection of a material bond, wherein the second DC voltage terminal element is connected to the second DC voltage connection element in an electrically conductive manner with a correct polarity by means of a second connection of a material bond, wherein the second DC voltage terminal element or the second DC voltage connection element has a continuous soldering chamber in the region of the first connection.

Inventors

  • J. STEGER

Assignees

  • 赛米控电子股份有限公司

Dates

Publication Date
20260508
Application Date
20210427
Priority Date
20200428

Claims (20)

  1. 1. A power electronic device having a power converter module (2), the power converter module (2) comprising a switching device (4), a first direct voltage terminal element (50) and a second direct voltage terminal element (52), the switching device (4) having a substrate with a first direct voltage conductor track and a second direct voltage conductor track, the first direct voltage terminal element (50) and the second direct voltage terminal element (52) being electrically conductively connected to the first direct voltage conductor track and the second direct voltage conductor track with a correct polarity, and the power electronic device (1) having a first direct voltage connection element (60) and a second direct voltage connection element (62), wherein the first direct voltage terminal element (50) is electrically conductively connected to the first direct voltage connection element (60) with a correct polarity by means of a material-bonded first connection (70); Characterized in that the second direct voltage terminal element (52) is connected to the second direct voltage connection element (62) in an electrically conductive manner by means of a material-bonded second connection (72), wherein in the region of each connection (70, 72) between the direct voltage terminal element and the associated direct voltage connection element, the first direct voltage terminal element (50) and the second direct voltage terminal element (52) and the first direct voltage connection element (60) and the second direct voltage connection element (62) respectively form a stack, wherein between the first direct voltage terminal element (50) and the second direct voltage terminal element (52) a first insulating means (54) is arranged, between the first direct voltage connection element (60) and the second direct voltage connection element (62) a second insulating means (64) is arranged, and wherein the second direct voltage terminal element (52) or the second direct voltage connection element (62) has a continuous welding cavity (530, 630) in the region of the first connection.
  2. 2. The power electronic device of claim 1, wherein: each material-bonded connection (70, 72) is embodied as a welded joint.
  3. 3. The power electronic device of claim 2, wherein: each material-bonded connection (70, 72) is embodied as a laser welded joint.
  4. 4. A power electronic device according to any of claims 1-3, characterized in that: The welding chambers (530, 630) are designed as windows or as single-sided or double-sided constrictions (632).
  5. 5. A power electronic device according to any of claims 1-3, characterized in that: The first direct voltage terminal element (50) or the first direct voltage connection element (60) rests on the support device (20).
  6. 6. The power electronic device of claim 5, wherein: The support device (20) is designed as part of the housing of the switching device (4) or as part of the cooling device (3) at least in the region of one of the connecting parts (70, 72).
  7. 7. The power electronic device of claim 5, wherein: The first direct voltage terminal element (50) or the first direct voltage connection element (60) is arranged on the support device (20) by means of a clamping device (74) in the region of the first connection (70).
  8. 8. The power electronic device of claim 7, wherein: the first direct voltage terminal element (50) or the first direct voltage connection element (60) is arranged on the support device (20) by means of a clamping device (74) next to the first connection (70).
  9. 9. The power electronic device of claim 7, wherein: The clamping device (74) is designed as a screw connection (740) and has an insulating sleeve which at least partially surrounds the screw and thus passes through an opening (510) of the first direct voltage terminal element (50) in an electrically insulating manner.
  10. 10. The power electronic device of claim 9, wherein: the clamping device (74) passes through a second opening of the second DC voltage connection element (62) in an electrically insulating manner.
  11. 11. A power electronic device according to any of claims 1-3, characterized in that: The first direct voltage terminal element (50) is arranged in a first main plane (HE 1), the second direct voltage terminal element (52) and the first direct voltage connection element (60) are arranged in a second main plane (HE 2), and the second direct voltage connection element (62) is arranged in a third main plane (HE 3), or wherein The first direct voltage connection element (60) is arranged in a first main plane (HE 1), the second direct voltage connection element (62) and the first direct voltage terminal element (50) are arranged in a second main plane (HE 2), and the second direct voltage terminal element (52) is arranged in a third main plane (HE 3), and the main planes are stacked in a normal direction (N).
  12. 12. A power electronic device according to any of claims 1-3, characterized in that: the two stacked first insulation means (54) and second insulation means (64) overlap each other in a region between the first connection portion and the second connection portion.
  13. 13. A power electronic device according to any of claims 1-3, characterized in that: Each direct voltage terminal element (50, 52) is designed as a metal foil or sheet.
  14. 14. The power electronic device of claim 13, wherein: each direct voltage terminal element (50, 52) has a thickness of 300 μm to 2000 μm.
  15. 15. The power electronic device of claim 13, wherein: Each direct voltage terminal element (50, 52) has a thickness of 500 μm to 1500 μm.
  16. 16. A power electronic device according to any of claims 1-3, characterized in that: Each of the first insulating means (54) and the second insulating means (64) is formed of a plastic material having a high dielectric strength.
  17. 17. The power electronic device of claim 16, wherein: the plastic material having high dielectric strength includes polyimide, ethylene tetrafluoroethylene copolymer or liquid crystal polymer.
  18. 18. The power electronic device of claim 16, wherein: each of the first insulating means (54) and the second insulating means (64) has a thickness of 50 μm to 500 μm.
  19. 19. The power electronic device of claim 16, wherein: Each of the first insulating means (54) and the second insulating means (64) has a thickness of 75 μm to 150 μm.
  20. 20. A power electronic device according to any of claims 1-3, characterized in that: The DC voltage connection elements (60, 62) form a DC voltage source for the power converter module (2).

Description

Power electronic device and manufacturing method thereof Technical Field A power electronic device and a method of manufacturing the same are described. The present power electronic device is designed with a power converter module, which comprises a switching device and a first and a second direct voltage (DC) voltage terminal element, the switching device having a substrate with a first and a second DC voltage conductor track to which the first and the second DC voltage terminal element are connected in an electrically conductive manner with the correct polarity, and the power electronic device having a first and a second DC voltage connection element, wherein each DC voltage terminal element is connected in an electrically conductive manner to the associated first DC voltage connection element in each case by means of a material-bonded connection. Background DE 10 2009 043 181 A1 discloses a power converter device having a plurality of power converter modules with cooling devices, with power semiconductor modules and with a capacitor device per power converter module. In this case, the power semiconductor module is arranged adjacent to the capacitor device. The dc load terminal element of the power semiconductor module is connected to the capacitor device by a planar busbar, wherein the planar busbar is formed from a first and a second metal shaped body with an insulating interlayer, and the planar busbar covers the capacitor device in at least one orientation. The bus bars of two adjacent power converter modules can be connected to each other in a low-inductance manner by means of a first metal shaped body, which is connected using a first connecting body and a first connecting means, and by means of a second metal shaped body, which is connected using a second connecting body and a second connecting means. The first connector is additionally covered by the second connector. DE 10 2017 109 706 B3 discloses a power electronic device which is designed with a power converter module which has a first and a second direct voltage terminal element and a first and a second direct voltage connection element which are in each case connected in an electrically conductive manner to an associated direct voltage terminal element with the correct polarity, wherein the first and the second direct voltage terminal element and the first and the second direct voltage connection element always form a stack, wherein in each case an insulating device is arranged between them, the first direct voltage terminal element has a first opening in a first main plane which is closed thereby, the second direct voltage terminal element has a second opening in a third main plane which is closed thereby and aligned with the first opening, the second direct voltage terminal element and the first direct voltage connection element are arranged in a second main plane and are laterally spaced apart from one another in an opening region, the second main plane being arranged between the first main plane and the third main plane. In this arrangement, the clamping device extends through the first opening and the second opening in an electrically insulating manner, so that an electrically conductive clamping connection is formed between the first direct voltage terminal element and the first direct voltage connection element and between the second direct voltage terminal element and the second direct voltage connection element. Disclosure of Invention In view of the mentioned prior art, the object of the present invention is to propose a power electronic device with a power converter module and a method for the production thereof, wherein the connection of the dc voltage terminal element of the power converter module for external connection of the power converter module to the dc voltage connection element is implemented in a low-inductance manner and in a material-bonded manner. According to the invention, this object is achieved by a power electronic device having a power converter module, which comprises a switching device, a first direct voltage terminal element and a second direct voltage terminal element, which switching device has a substrate with a first direct voltage conductor track and a second direct voltage conductor track, to which the first direct voltage terminal element and the second direct voltage terminal element are electrically conductively connected with the correct polarity, and having a first direct voltage connection element and a second direct voltage connection element, wherein the first direct voltage terminal element is electrically conductively connected to the first direct voltage connection element by means of a material-bonded first connection, wherein the second direct voltage terminal element is electrically conductively connected to the second direct voltage connection element by means of a material-bonded second connection, wherein in each connection region between the direct voltage terminal element and the as