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CN-121993601-A - Sealing member, inverter, motor controller, electric drive system and vehicle

CN121993601ACN 121993601 ACN121993601 ACN 121993601ACN-121993601-A

Abstract

The invention belongs to the technical field of vehicles, and particularly relates to a sealing element, an inverter, a motor controller, an electric driving system and a vehicle. The sealing member includes the sealing member main part, the sealing member main part is used for running through the through-hole on the inverter casing, just the outer wall of sealing member main part can with the sealed butt of inner wall of through-hole, be provided with the sealing hole on the sealing member main part, the sealing hole is used for supplying the female row of three-phase to insert, just the inner wall of sealing hole can with the sealed butt of female row of three-phase. The sealing piece can seal the clearance between the through hole on the inverter shell and the three-phase busbar of the capacitor, so that the assembly parts are few, the working procedure is simple, and the production efficiency is improved.

Inventors

  • LI XIAOTENG
  • Meng Xiangpan

Assignees

  • 上海理想汽车科技有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (14)

  1. 1. The sealing member is characterized by comprising a sealing member main body (30), wherein the sealing member main body (30) is provided with an outer edge which is used for being abutted against the inner wall of a through hole in an inverter shell (10), the sealing member main body (30) is provided with a sealing hole (321) for inserting a three-phase busbar of a power supply container, the sealing hole (321) is arranged in a penetrating manner along the thickness direction of the sealing member main body (30), and the sealing hole (321) is provided with a hole wall which is used for being abutted against the three-phase busbar.
  2. 2. The seal according to claim 1, characterized in that the outer wall of the seal body (30) is provided with a first sealing projection (322), the first sealing projection (322) being intended to abut against the inner wall of the through hole.
  3. 3. The seal according to claim 1, characterized in that the seal hole (321) comprises a first hole portion (3211) and a second hole portion (3212), the length of the first hole portion (3211) is larger than the length of the second hole portion (3212), and the first hole portion (3211) and the second hole portion (3212) are connected in a convex shape, the first hole portion (3211) is used for inserting a positive electrode busbar (21) and an insulating layer (23) of the three-phase busbar, and the second hole portion (3212) is used for inserting a negative electrode busbar (22) of the three-phase busbar.
  4. 4. A seal according to claim 3, wherein second sealing protrusions (323) are provided on opposite side walls of the first hole portion (3211) and the second hole portion (3212), the second sealing protrusions (323) on the first hole portion (3211) being adapted to abut against the positive electrode busbar (21), and the second sealing protrusions (323) on the second hole portion (3212) being adapted to abut against the negative electrode busbar (22).
  5. 5. A seal according to claim 3, characterized in that a third sealing protrusion (324) is provided on the side wall of the first hole portion (3211) and the second hole portion (3212) connected, the third sealing protrusion (324) being adapted to abut the insulating layer (23).
  6. 6. The seal according to claim 5, wherein the number of the third sealing protrusions (324) is plural, the plurality of the third sealing protrusions (324) are spaced apart along the axial direction of the sealing hole (321), and at least part of the third sealing protrusions (324) are different in protrusion height toward the insulating layer (23).
  7. 7. The seal according to claim 5, characterized in that the third sealing projection (324) has a guiding bevel (3241), the guiding bevel (3241) being arranged obliquely in the insertion direction of the three-phase busbar and the sealing hole (321).
  8. 8. The seal according to any one of claims 1-7, wherein the seal body (30) comprises a support (31) and a sealing layer (32), the sealing layer (32) being wrapped around the outside of the support (31), the hardness of the support (31) being greater than the hardness of the sealing layer (32).
  9. 9. An inverter, comprising: An inverter case (10) provided with a through hole; The capacitor comprises a three-phase busbar; the seal of any one of claims 1-8, the seal body (30) extending through the through hole, and an outer wall of the seal body (30) being in sealing abutment with an inner wall of the through hole, the three-phase busbar being co-inserted into the seal hole (321), and a wall of the seal hole (321) being in sealing abutment with the three-phase busbar.
  10. 10. The inverter according to claim 9, wherein each phase of the busbar comprises a positive electrode busbar (21) and a negative electrode busbar (22), and the positive electrode busbar (21) and the negative electrode busbar (22) are stacked in parallel along the width direction of the seal hole (321).
  11. 11. The inverter according to claim 10, characterized in that each phase busbar further comprises an insulating layer (23), the insulating layer (23) being arranged between the positive busbar (21) and the negative busbar (22), and the insulating layers (23) in three phase busbars being integrally arranged.
  12. 12. Motor controller, characterized by comprising an inverter according to any of claims 9-11.
  13. 13. An electric drive system comprising the motor controller of claim 12.
  14. 14. A vehicle comprising an electric drive system as claimed in claim 13.

Description

Sealing member, inverter, motor controller, electric drive system and vehicle Technical Field The invention relates to the technical field of vehicles, in particular to a sealing element, an inverter, a motor controller, an electric driving system and a vehicle. Background Along with the development of the vehicle inverter to the directions of high voltage, high switching frequency, high power density and high integration level, through experiments, calculation and analysis, the magnitude of the equivalent series inductance (Equivalent Series Inductance, ESL) plays a critical determining role in the smoothness and stability of bus voltage and output phase current and the improvement of driving efficiency, and particularly after the introduction of the SiC high-frequency switching device, the equivalent series inductance becomes one of main focusing points in electric control design and reflects the whole technical level of electric control. The reduction of the equivalent series inductance can improve the efficiency of the inverter, the output current capacity and the peak voltage stress risk. The size of the equivalent series inductance is strongly related to the copper bar structure of the capacitor. In the related art, positive electrode copper bars and negative electrode copper bars of each phase of copper bars of the three-phase copper bars of the capacitor are distributed in parallel at intervals, lamination does not exist between the positive electrode copper bars and the negative electrode copper bars, the distance between the positive electrode copper bars and the negative electrode copper bars is larger, therefore, the equivalent series inductance of the capacitor is larger, the three-phase copper bars need to penetrate through an inverter shell, the occupied area is longer due to the fact that the distance between the positive electrode copper bars and the negative electrode copper bars is larger and lamination does not exist, and the equivalent series inductance of the capacitor is further increased. Disclosure of Invention The invention aims to provide a sealing element, an inverter, a motor controller, an electric driving system and a vehicle, which can improve production efficiency. To achieve the purpose, the invention adopts the following technical scheme: The sealing piece comprises a sealing piece main body, wherein the sealing piece main body is provided with an outer edge which is used for being abutted with the inner wall of a through hole in the inverter shell, the sealing piece main body is provided with a sealing hole for inserting a three-phase busbar of a power supply container, the sealing hole is arranged in a penetrating manner along the thickness direction of the sealing piece main body, and the sealing hole is provided with a hole wall which is used for being abutted with the three-phase busbar. As a preferable technical scheme of the seal member, the outer wall of the seal member main body is provided with a first seal protrusion for abutting with the inner wall of the through hole. As the preferable technical scheme of sealing member, the sealed hole includes first hole portion and second hole portion, the length of first hole portion is greater than the length of second hole portion, just first hole portion with second hole portion is protruding font and connects, first hole portion is used for supplying positive pole female row and the insulating layer in the female row of three-phase inserts, second hole portion is used for supplying negative pole female row in the female row of three-phase inserts. As a preferable technical scheme of the sealing member, second sealing protrusions are arranged on the side walls of the first hole portion and the second hole portion, the second sealing protrusions on the first hole portion are used for being in butt joint with the positive electrode busbar, and the second sealing protrusions on the second hole portion are used for being in butt joint with the negative electrode busbar. As a preferable technical scheme of the sealing member, a third sealing protrusion is arranged on the side wall connected with the first hole part and the second hole part, and the third sealing protrusion is used for being abutted with the insulating layer. As a preferable technical scheme of the sealing member, the number of the third sealing bulges is a plurality of, the plurality of the third sealing bulges are distributed at intervals along the axial direction of the sealing hole, and at least part of the third sealing bulges have different heights towards the insulating layer. As a preferred technical scheme of the sealing element, the third sealing protrusion is provided with a guiding inclined plane, and the guiding inclined plane is obliquely arranged along the insertion direction of the three-phase busbar and the sealing hole. As the preferable technical scheme of sealing member, the sealing member main part includes support frame and sealing layer