Patent ID: 11967690
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A battery pack comprising:
a housing including a main body and internally defining a battery storage room;
a plurality of prismatic batteries disposed in rows in the battery storage room with each of the rows including two or more of the plurality of prismatic batteries, the two or more of the plurality of prismatic batteries being disposed in substantially parallel relation with widthwise extending side faces of the two or more of the plurality of prismatic batteries being aligned in a direction along a depth of each of the two or more of the plurality of prismatic batteries; and
a plurality of bus bars forming a plurality of parallel battery structures that each have parallel connection of two or more of the plurality of prismatic batteries, the plurality of bus bars electrically connecting the plurality of prismatic batteries to connect the plurality of parallel battery structures in series, wherein:
the plurality of parallel battery structures connected in series form a battery connection structure that includes a turn causing a reversal of direction of series connection of the plurality of parallel battery structures,
the plurality of parallel battery structures in series are connected such that each parallel battery structure is connected to an adjacent parallel battery structure in a widthwise direction,
the housing includes a lid abutting an upper end face of the main body,
an underside of the lid includes:
an upper underside part,
a lower underside part that is in a lower position along a height than the upper underside part, and
a step connecting an edge of the lower underside part and the upper underside part,

the lower underside part is located entirely between the rows including the plurality of prismatic batteries,
in a height direction of the plurality of prismatic batteries, at least a portion of the lower underside part is located above an upper face of each prismatic battery of the plurality of prismatic batteries, and
in the height direction of the plurality of prismatic batteries, the upper end face of the main body is located above an upper face of each prismatic battery of the plurality of prismatic batteries.