Patent ID: 11923555
Assignee: PANASONIC ENERGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. A battery pack comprising:
a plurality of battery cells; and
a holder holding the plurality of battery cells to be arranged in a parallel posture, wherein the holder includes a partition wall between adjacent two of the plurality of battery cells to arrange the plurality of battery cells at fixed positions,
the partition wall has a three-layer structure including:
resin molded layers each having a surface facing a corresponding battery cell of the each adjacent two of the plurality of battery cells, and each surface being shaped to arrange the corresponding battery cell at a fixed position thereof, and
a thermally insulating plate is disposed inside and being sandwiched by the resin molded layers,
the holder further includes a synthetic resin molding the resin molded layers to be integrated into a single piece, and
the holder includes an inflow space into which an adjacent resin molded layer of the resin molded layers is configured to flow when the adjacent resin molded layer is melted,
wherein the holder includes:
a plurality of holding tubes, each holding tube for storing a corresponding one of the plurality of battery cells inside, and
the inflow space provided outside the plurality of holding tubes, the inflow space being a space into which an adjacent holding tube of the plurality of holding tubes flows when the adjacent holding tube is melted by heat,, wherein
the plurality of holding tubes is arranged in multiple stages and multiple rows,
the partition wall is a cross-shaped partition wall that has a vertical section and a horizontal section intersecting each other at a central portion of the cross-sectional partition wall,
the vertical section defines an interface between horizontally adjacent holding tubes of the plurality of holding tubes, and the horizontal section defines an interface between vertically adjacent holding tubes of the plurality of holding tubes, and
the inflow space includes a central inflow space being elongated along a length of the plurality of battery cells, and being located in the central portion of the cross-shaped partition wall.