Battery

Patent metadata

Field	Value
Publication number	US-9502697-B2
Application number	US-201314409551-A
Country	US
Kind code	B2
Filing date	Apr 19, 2013
Priority date	Jun 27, 2012
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A lid member of a battery case has a protruding section including an inside-outside direction an outside tapered surface, and a top surface between the inside tapered surface and the outside tapered surface. In a cross section, the area of a first imaginary area enclosed by a first line segment of the inside tapered surface, a first imaginary line extending downward from the top of the first line segment, and a second imaginary line extending in an inside-outside direction from the top surface, is smaller than the area of a second imaginary area enclosed by a second line segment of the outside tapered surface, a third imaginary line extending downward from the top of the second line segment, and the second imaginary line.

First claim

The invention claimed is:

1. A battery including:
a power generating element;
a case having an opening and housing the power generating element;
a lid member welded to the opening of the case to close the opening;
a current collector terminal member including: a current collector part having one end electrically connected to the power generating element and another end facing the lid member; and an insertion part having one end electrically connected to the current collector part and another end inserted through and extended out of the lid member in a vertical direction corresponding to a thickness direction of the lid member, the other end of the insertion part including a deformed part widened in diameter by caulking and electrically connected to an outer connecting terminal; and
a gasket placed in contact with a lower surface of the lid member to seal between the lid member and the current collector terminal member, wherein
the lid member includes a protrusion protruding downward from the lower surface in the vertical direction and surrounding the insertion part in a circumferential direction through the gasket, and
the protrusion has a top portion including:
an inner tapered surface located on a side close to the insertion part in an inside-outside direction corresponding to a direction perpendicular to the vertical direction;
an outer tapered surface located on an opposite side to the insertion part side in the inside-outside direction; and
a top surface configured as a surface perpendicular to the vertical direction between the inner tapered surface and the outer tapered surface, wherein
the protrusion forms a first imaginary region and a second imaginary region in a vertical cross-section including an axis center of the insertion part in the vertical direction;
the first imaginary region is surrounded by a first line segment defined in a vertical cross-section of the inner tapered surface, a first imaginary line extending downward from an uppermost point of the first line segment in the vertical direction, and a second imaginary line extending from a vertical cross-section of the top surface in the inside-outside direction;
the second imaginary region is surrounded by a second line segment defined in a vertical cross-section of the outer tapered surface, a third imaginary line extending downward from an uppermost point of the second line segment in the vertical direction, and the second imaginary line; and
the first imaginary region has a smaller area than the second imaginary region.

2. The battery according to claim 1 , wherein
the inner tapered surface and the outer tapered surface are equal in inclination angle, and
the first line segment is shorter in length than the second line segment.

Assignees

• Harayama Takashi
• Toyota Motor Co Ltd

Inventors

• Harayama Takashi

Classifications

• H01M50/528 Primary

  Fixed electrical connections, i.e. not intended for disconnection · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/562

  characterised by the material · CPC title

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/176

  for prismatic or rectangular cells (H01M50/181 takes precedence) · CPC title