CYLINDRICAL BATTERY CELL WITH NON-AQUEOUS ELECTROLYTE
A non-aqueous electrolyte battery cell according to the present invention includes: a generating unit; a battery cell container that contains the generating unit; and a sealing lid, disposed in an open end portion of the battery cell container, and that seals the battery cell container via an insulating gasket; wherein a sealing point of the insulating gasket is established at a region that is spaced by a predetermined distance in radially outward direction of the cylindrical battery cell from an inner peripheral edge of a folded over portion that is formed at the open end portion of the cylindrical battery cell container.
1 . A cylindrical battery cell containing a non-aqueous electrolyte, comprising:
a generating unit;
a battery cell container that contains the generating unit; and
a sealing lid, disposed in an open end portion of the battery cell container, and that seals the battery cell container via an insulating gasket;
wherein a sealing point of the insulating gasket is established at a region that is spaced by a predetermined distance in radially outward direction of the cylindrical battery cell from an inner peripheral edge of a folded over portion that is formed at the open end portion of the cylindrical battery cell container.
2 . A cylindrical battery cell containing a non-aqueous electrolyte, comprising:
a generating unit;
a battery cell container that contains the generating unit; and
a sealing lid, disposed in an open end portion of the battery cell container, and that seals the battery cell container via an insulating gasket;
wherein the sealing lid is fixed by swaging at the open end portion of the battery cell container so that upper and lower surfaces of its peripheral portion are sandwiched by the insulating gasket, and so that sealing points are established upon the insulating gasket where it contacts the upper and lower surfaces of the peripheral portion of the sealing lid.
3 . A cylindrical battery cell containing a non-aqueous electrolyte according to claim 2 , wherein the respective thickness dimensions Ha and Hb of the insulating gasket at the sealing points at the upper and lower surfaces of the peripheral portion after processing satisfy Ha>Hb.
4 . A cylindrical battery cell containing a non-aqueous electrolyte according to claim 2 , wherein:
an annular swaged space is defined at the open end portion of the battery cell container; and
the upper and lower surfaces of the peripheral portion of the sealing lid are sandwiched within a inner surface of the annular swaged space, with the interposition of the insulating gasket.
5 . A cylindrical battery cell containing a non-aqueous electrolyte according to claim 4 , wherein the annular swaged space is a space that is sandwiched between a protruding portion that is formed by concaving inwards the outer peripheral surface of the open end portion of the battery cell container, and a folded over portion that is formed by folding over the open end portion of the battery cell container towards interior of the battery cell, and the folded over portion is formed as a sloping surface that is parallel to a plane orthogonal to the axis of the battery cell, or whose angle of inclination downwards towards an axis of the battery cell is less than 5°.
6 . A cylindrical battery cell containing a non-aqueous electrolyte according to claim 1 , wherein the insulating gasket is made from a perfluorocarbon type fluororesin.
7 . A cylindrical battery cell containing a non-aqueous electrolyte according to claim 2 , wherein the insulating gasket is made from a perfluorocarbon type fluororesin.