Sealed storage battery and method for manufacturing the same
First Claim
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1. A sealed storage battery comprising a plurality of abutting cells, each cell having:
- a casing including opposing substantially parallel outer side faces and an open top, each outer side face for facing an outer side face of an abutting cell, the casing being constructed from a synthetic resin;
an electrode group and an electrolyte residing within the housing;
a plurality of longitudinally extending ribs arranged substantially in parallel with each other on each outer side face of the casing, the ribs forming longitudinally extending cooling medium channels therebetween on each outer side face of the casing; and
a lid constructed from a synthetic resin, the lid being sealingly welded to the top of the casing at a welding juncture at the outer side faces, the lid sealingly enclosing the electrode group and the electrolyte within the casing, the welding juncture at each outer side face being substantially flat with respect to the outer side face, whereby a cooling medium passing along the cooling medium channels on the outer side faces of the casing is substantially unrestricted at the welding juncture.
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Abstract
A sealed storage battery has a rectangular casing (3) and a lid (2) of synthetic resin, which are connected by welding so as to seal an opening of the rectangular casing (3), and protruded portion on the outer welded portion (5) is removed and smoothed so that air as a cooling module is smoothly flown in spaces formed by ribs (4) on the battery casing (3) and the lid (2).
114 Citations
8 Claims
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1. A sealed storage battery comprising a plurality of abutting cells, each cell having:
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a casing including opposing substantially parallel outer side faces and an open top, each outer side face for facing an outer side face of an abutting cell, the casing being constructed from a synthetic resin; an electrode group and an electrolyte residing within the housing; a plurality of longitudinally extending ribs arranged substantially in parallel with each other on each outer side face of the casing, the ribs forming longitudinally extending cooling medium channels therebetween on each outer side face of the casing; and a lid constructed from a synthetic resin, the lid being sealingly welded to the top of the casing at a welding juncture at the outer side faces, the lid sealingly enclosing the electrode group and the electrolyte within the casing, the welding juncture at each outer side face being substantially flat with respect to the outer side face, whereby a cooling medium passing along the cooling medium channels on the outer side faces of the casing is substantially unrestricted at the welding juncture. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for sealing a cell in a sealed storage battery comprising a plurality of abutting cells, each cell having:
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a casing including opposing substantially parallel outer side faces, an open top, and a welding region adjacent to the open top and each outer side face and surrounding the open top, each outer side face for facing an outer side face of an abutting cell, the casing being constructed from a synthetic resin that becomes deformable when heated; an electrode group and an electrolyte residing within the housing; a plurality of longitudinally extending ribs arranged substantially in parallel with each other on each outer side face of the casing, the ribs forming longitudinally extending cooling medium channels therebetween on each outer side face of the casing; and a lid including a perimeter and a welding region adjacent to and surrounding the perimeter, the welding region of the casing corresponding to the welding region of the lid, the lid being constructed from a synthetic resin that becomes deformable when heated; wherein the method for sealing the cell comprises the steps of; heating the welding region of the lid such that the lid welding region becomes deformable; heating the welding region of the casing such that the casing welding region becomes deformable; placing the welding region of the lid in registry with the welding region of the casing; pressing the welding region of the lid into contact with the welding region of the casing to form a welding juncture on each outer side face of the casing and to seal the lid to the top of the casing at the welding juncture, the lid sealingly enclosing the electrode group and the electrolyte within the casing, the pressing step also forming a protrusion at the welding juncture on each outer side face extending away from the outer side face; and removing the protrusion at the welding juncture on each outer side face such that the welding juncture on each outer side face is substantially flat with respect to the outer side face, whereby a cooling medium passing along the cooling medium channels on the outer side faces is substantially unrestricted at the welding juncture. - View Dependent Claims (8)
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Specification