Busbar unit for motor

{
  "publication_number": "US12040674B2",
  "country": "US",
  "kind": "B2",
  "title": "Busbar unit for motor",
  "abstract": "A busbar assembly, which is electrically connected to a motor comprising a stator around which coils are wound, includes: a terminal part including terminal members each including terminal grooves configured to accommodate the coils such that the coils are electrically connected to the terminal grooves; and a holder configured to support the terminal part.",
  "claims": [
    "1. A busbar assembly electrically connected to a motor comprising a stator around which coils are wound, the busbar unit comprising: a terminal part comprising terminal members each including terminal grooves configured to accommodate the coils such that the coils are electrically connected to the terminal grooves; and a holder configured to support the terminal part, wherein the terminal members comprise a first terminal member comprising a first horizontal terminal body including first terminal grooves, among the terminal grooves, configured to accommodate the coils, and a first vertical terminal body connected to an end of the first horizontal terminal body; a second terminal member comprising a second horizontal terminal body including second terminal grooves, among the terminal grooves, configured to accommodate the coils, the second horizontal terminal body being stacked on an upper portion of the first horizontal terminal body such that the first terminal grooves are exposed, and the second horizontal terminal body having a form of a continuous ring, and a second vertical terminal body connected to an end of the second horizontal terminal body; and a spacer interposed between the first horizontal terminal body and the second horizontal terminal body, and the spacer having an inner circumferential surface corresponding to an inner diameter of the second horizontal terminal body.",
    "2. The busbar assembly of claim 1, wherein the terminal grooves are exposed from upper portions of the terminal members.",
    "3. The busbar assembly of claim 2, wherein the coils are seated in the terminal grooves and fixed in the terminal grooves by welds.",
    "4. The busbar assembly of claim 3, wherein the welds comprise laser welds.",
    "5. The busbar assembly of claim 3, wherein the welds comprise welds formed by a green laser beam.",
    "6. The busbar assembly of claim 1, wherein the holder comprises: a first accommodation portion configured to accommodate the first vertical terminal body; and a second accommodation portion configured to accommodate the second vertical terminal body.",
    "7. The busbar assembly of claim 1, wherein a fastening hole is disposed in one of the first terminal member or the second terminal member, and a fastening portion configured to be fastened to the fastening hole is disposed on the spacer.",
    "8. The busbar assembly of claim 7, wherein the fastening portion comprises a snap-fit coupling portion configured to be fastened to the fastening hole in a snap-fit manner.",
    "9. A busbar assembly electrically connected to a motor comprising a stator around which coils are wound, the busbar unit comprising: a terminal part comprising terminal members each including terminal grooves configured to accommodate the coils such that the coils are electrically connected to the terminal grooves; and a holder configured to support the terminal part, wherein the terminal members comprise a first terminal member comprising a first horizontal terminal body including first terminal grooves, among the terminal grooves, configured to accommodate the coils, and a first vertical terminal body connected to an end of the first horizontal terminal body; a second terminal member comprising a second horizontal terminal body including second terminal grooves, among the terminal grooves, configured to accommodate the coils, and the second horizontal terminal body being stacked on an upper portion of the first horizontal terminal body such that the first terminal grooves are exposed, and a second vertical terminal body connected to an end of the second horizontal terminal body; and a spacer interposed between the first terminal member and the second terminal member, and wherein a fastening hole is disposed in either one of the first terminal member and the second terminal member, and a fastening portion configured to be fastened to the fastening hole is disposed on the spacer.",
    "10. The busbar assembly of claim 9, wherein the fastening portion comprises a snap-fit coupling portion configured to be fastened to the fastening hole in a snap-fit manner."
  ],
  "description_excerpt": "The present disclosure relates to a busbar unit for a motor, and more particularly, to a busbar unit for a motor that has improved durability, stability, and reliability.\n\nA hybrid vehicle or an electric vehicle, which is called an environmentally-friendly vehicle, generates driving power using an electric motor (hereinafter, referred to as a ‘drive motor’) that obtains rotational force from electrical energy.\n\nIn general, the drive motor includes a stator coupled to a housing, and a rotor rotatably disposed in the stator with a predetermined air gap from the stator.\n\nThe stator includes stator cores formed by stacking electrical steel sheets, and stator coils wound around the stator cores.\n\nA busbar is provided at an upper side of the stator, and the stator coils are connected to an external power source through the busbar.\n\nThe busbar may be structured to include a plurality of terminals inside a ring-shaped holder, and the terminals may be constituted as a combination of phase terminals connected to U-phase, V-phase, and W-phase power sources, and a neutral terminal that connects the phase terminals.\n\nMeanwhile, the stator coils are fused with terminal portions of the terminals by being welded to the terminal portions of the terminals (e.g., welded by applying electric current) in a state in which the stator coils are compressed. After the terminal portions of the terminals are fused with the stator coils, an insulating material (e.g., epoxy) for insulation between the terminals is applied to cover the terminal portions of the terminals.",
  "cpc": [
    "H02K 3/522",
    "B23K 26/00",
    "F16B 21/06",
    "H02K 2203/09",
    "H02K 2213/03",
    "H02K 3/505",
    "H02K 5/225"
  ],
  "ipc": [
    "H02K 3/50",
    "H02K 3/52",
    "H02K 5/22"
  ],
  "assignees": [
    "Hyundai Mobis Co Ltd"
  ],
  "inventors": [
    "Seong Jun HWANG",
    "Yeong Woo SEO",
    "Hye Seong Yang"
  ],
  "filing_date": "2021-07-14",
  "publication_date": "2024-07-16",
  "grant_date": "2024-07-16",
  "priority_date": "2020-07-21",
  "application_number": "US-202117375357-A",
  "family_id": "78408892",
  "cited_by_count": 0,
  "citations": [
    "CN103532312A",
    "CN103532312B",
    "WO2021182635A1"
  ]
}