Patent ID: 9478362
Filing Date: 2016-10-25
CPC Classification: H01G,H01M,Y02E

Claim Text:
1. An electrical storage unit, comprising: a plurality of cylindrically-shaped electrical storage elements electrically connected to each other and arranged in a plurality of rows, the plurality of cylindrically-shaped electrical storage elements each having a peripheral surface, the peripheral surface being an electrode; a single-piece rectangular parallelepiped holder formed to have plane symmetry and being a solid metallic body, the single-piece rectangular parallelepiped holder arranged only between two rows of the cylindrically-shaped electrical storage elements and having two major outside surfaces and a plurality of substantially identical arc-shaped concave surfaces on each of the two major outside surfaces opposing each other, the arc-shaped concave surfaces extending substantially parallel in a same direction along each of the two major outside surfaces continuously from a first end of the single-piece rectangular parallelepiped holder to a second end of the single-piece rectangular parallelepiped holder opposite the first end, wherein the first end of the single-piece rectangular parallelepiped holder corresponds to a first end of the cylindrically-shaped electrical storage elements and the second end of the single-piece rectangular parallelepiped holder corresponds to a second end of the cylindrically-shaped electrical storage elements, wherein each of the two major outside surfaces include an equal number of the plurality of arc-shaped concave surfaces, each of the plurality of arc-shaped concave surfaces is configured to contain a part of the peripheral surface of one of the cylindrically-shaped electrical storage elements that extends from a vicinity of a first end of the cylindrically-shaped electrical storage elements to a vicinity of a second end of the cylindrically-shaped electrical storage elements in a direction of a longitudinal axis of the cylindrically-shaped electrical storage elements, and the plurality of arc-shaped concave surfaces are substantially semi-circular in shape; a fix plate placed opposite one of the major outside surfaces and placed only on an outer side of the cylindrically-shaped electrical storage elements and attached to the single-piece rectangular parallelepiped holder so as to hold a row of the plurality of cylindrically-shaped electrical storage elements between the fix plate and the single-piece rectangular parallelepiped holder; and a first joining material placed only between the part of the peripheral surface of each of the cylindrically-shaped electrical storage elements and the plurality of arc-shaped concave surfaces of the single-piece rectangular parallelepiped holder to join the cylindrically-shaped electrical storage element and the single-piece rectangular parallelepiped holder, the first joining material being a double-sided adhesive tape which comprises an insulating material and a thermal conductive filler having insulation properties, the double-sided adhesive tape having a thickness not smaller than a difference between a radius of the concave surface of the single-piece rectangular parallelepiped holder and a radius of the cylindrically-shaped electrical storage element, and wherein an entire peripheral surface of each of the cylindrically-shaped electrical storage elements is covered with the single-piece rectangular parallelepiped holder or the fix plate.