Power source unit

{
  "publication_number": "US2013183573A1",
  "country": "US",
  "kind": "A1",
  "title": "Power source unit",
  "abstract": "A power source unit includes a battery module including a stack and a coupling member that binds the stack, the stack including a plurality of battery cells aligned, and a container that accommodates therein the battery module. The container includes a projecting portion projecting from an inner wall of the container toward a surface of the battery module, and a top end portion of the projecting portion is located separately from the coupling member.",
  "claims": [
    "1. A power source unit comprising: a battery module including a stack and a coupling member that binds the stack, the stack including a plurality of battery cells aligned; and a container that accommodates therein the battery module, wherein the container includes a projecting portion projecting from an inner wall of the container toward a surface of the battery module, and a top end portion of the projecting portion is located separately from the coupling member. 2. The power source unit according to claim 1, wherein the projecting portion is formed on an inner wall different from the inner wall opposing the coupling member. 3. The power source unit according to claim 1, wherein at least one of the battery cells includes a safety valve located on a face of the battery cell opposing the coupling member, and the coupling member includes a hollow space. 4. The power source unit according to claim 3, wherein the battery cell further includes an electrode terminal on the face thereof opposing the coupling member, and the face opposing the coupling member is oriented to oppose a side wall of the container. 5. The power source unit according to claim 1, wherein at least one of the battery cells includes an electrode terminal on the face thereof opposing the coupling member, and the face opposing the coupling member is oriented to oppose a side wall of the container. 6. The power source unit according to claim 1, wherein the stack is held between holding plates respectively provided on side faces of the stack, the holding plates being fixed to the coupling member, respective peripheral edges of the holding plates are connected via a first beam member, and the holding plates and the first beam member are formed as portions of a single sheet of bent metal plate. 7. The power source unit according to claim 6, wherein the projecting portion is provided on the inner wall opposing at least one of the holding plates. 8. The power source unit according to claim 6, further comprising an electric device attached to at least one of the holding plates, wherein the electric device includes a wall taller than a height of parts included in the electric device and projecting from a side of the holding plate and, and a top end portion of the wall is oriented to oppose the top end portion of the projecting portion. 9. The power source unit according to claim 1, wherein the container is formed of a synthetic resin."
  ],
  "description_excerpt": "The present invention relates to a power source unit including a battery module composed of, for example, a plurality of stacked secondary batteries.\n\nSecondary batteries are widely utilized not only as a substitute for a primary battery but also as a power source for electronic apparatuses such as mobile phones and IT devices. In particular, non-aqueous electrolyte secondary batteries, typically exemplified by a lithium ion secondary battery, have been increasingly applied to electric vehicles and large-scale industrial machines, because of the capability of providing high energy density. Further, to obtain an even higher voltage, non-aqueous electrolyte secondary batteries, which are battery cells, are stacked to constitute a battery module.\n\nSuch a battery module is generally placed in a single container. An example of the container can be found in Patent Literature 1 for example, which discloses a power source unit including a housing serving as the container that accommodates therein a battery module composed of a plurality of battery cells (see FIG. 12 of PTL 1).\n\nWith the conventional power source unit, however, the shock resistance and the heat resistance may be degraded. Accordingly, an object of the present invention is to provide a power source unit capable of improving the shock resistance and the heat resistance.\n\nIn an aspect, the present invention provides a power source unit including a battery module including a stack and a coupling member that binds the stack, the stack including a plurality of battery cells aligned, and a container that accommodates therein the battery module.",
  "cpc": [
    "H01M 50/579",
    "H01M 10/0525",
    "H01M 10/425",
    "H01M 2/1061",
    "H01M 2220/20",
    "H01M 50/209",
    "H01M 50/227",
    "H01M 50/264",
    "H01M 50/367",
    "H01M 50/51",
    "H01M 50/524",
    "H01M 50/581",
    "Y02E 60/10",
    "Y02P 70/50"
  ],
  "ipc": [
    "H01M 50/209",
    "H01M 50/227",
    "H01M 50/264",
    "H01M 50/367"
  ],
  "assignees": [
    "Lithium Energy Japan KK"
  ],
  "inventors": [
    "Toshiki Yoshioka",
    "Toshiki Kusunoki"
  ],
  "filing_date": "2013-01-11",
  "publication_date": "2013-07-18",
  "priority_date": "2012-01-16",
  "application_number": "US-201313740040-A",
  "family_id": "47740761",
  "cited_by_count": 38,
  "citations": [
    "US20040076883A1",
    "US20070026305A1",
    "JP2009170258A",
    "US20110206948A1",
    "US20120028094A1"
  ]
}