{
  "patent_number": "US 6828755",
  "country": "US",
  "title": "How Car Battery Modules Combine High and Low Voltage Systems",
  "original_title": "Battery system module",
  "summary": "A self-contained battery module that houses both high and low voltage batteries, a power converter, and safety switches in a single unit designed for efficient heat management.",
  "what_it_does": "This patent describes an integrated battery module for vehicles that packs a high-voltage battery (for heavy loads like motors) and a low-voltage battery (for electronics) into one container. It includes a DC-to-DC converter to move power between the two batteries and safety switches that automatically cut power if the container is opened or a service door is accessed. The design also features specific cooling paths and apertures to move heat out of the box, ensuring both the batteries and the converter stay within safe operating temperatures.",
  "what_it_does_not_cover": [
    "Does not cover battery systems that lack an integrated DC-to-DC converter.",
    "Does not cover systems that rely solely on liquid cooling rather than the described air-flow paths.",
    "Does not cover battery modules that do not include a safety disconnect switch triggered by opening the container or a service door.",
    "Does not cover standalone batteries that lack a secondary low-voltage battery within the same housing."
  ],
  "filed": "2002-10-15",
  "granted": "2004-12-07",
  "expires": "2022-10-15",
  "status": "expired",
  "holder": "Johnson Controls Technology Co",
  "holder_url": "https://patentbrief.org/company/johnson-controls-technology-co",
  "inventors": [
    {
      "name": "Chih Y. Chen",
      "url": "https://patentbrief.org/inventor/chih-y-chen"
    },
    {
      "name": "Thomas J. Green",
      "url": "https://patentbrief.org/inventor/thomas-j-green"
    },
    {
      "name": "Scott G. Klos",
      "url": "https://patentbrief.org/inventor/scott-g-klos"
    },
    {
      "name": "Michael E. Iverson",
      "url": "https://patentbrief.org/inventor/michael-e-iverson"
    },
    {
      "name": "Mark M. Gondek",
      "url": "https://patentbrief.org/inventor/mark-m-gondek"
    },
    {
      "name": "Thomas J. Dougherty",
      "url": "https://patentbrief.org/inventor/thomas-j-dougherty"
    }
  ],
  "times_cited": 46,
  "tags": [
    "automotive",
    "mechanical",
    "energy"
  ],
  "abstract": "A module for a battery is disclosed. The module includes a power system in the container. The power system also includes a high voltage battery for powering high voltage loads. The power system also includes a low voltage battery for powering low voltage loads. The module also includes a converter at least partially in the container configured for directing power provided from the high voltage battery to the low voltage battery. The module also includes a device for disconnecting at least one of the high voltage battery from the high voltage loads and the low voltage battery from the low voltage loads. The container is configured to transfer heat from the battery system to an outside of the container. A module for thermal management of a battery system is also disclosed. An energy management system for a battery system is also disclosed.",
  "url": "https://patentbrief.org/patent/us/6828755/battery-system-module",
  "markdown_url": "https://patentbrief.org/patent/us/6828755/battery-system-module/md",
  "google_patents_url": "https://patents.google.com/patent/US6828755",
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}