| 摘要 |
<p>PURPOSE:To enhance reliability and safety of a battery by forming a lug in a specified thickness range in the relation of the thickness of the lug, the melting of the tip of the lug, and the depth of the lower end in a coagulated part in the collective welding of a negative plate to a strap. CONSTITUTION:A controllable design value is determined so that the heat history region of a rolled body which causes anodic corrosion of a specific grid lug does not cross in the exposed region of the lug from the strap. When a negative plate 1 which has a rolled body of a lead alloy containing a minute amount of calcium as a lug 2 of a negative grid is collectively welded to the strap, in the relation of the thickness T (mm) of the lug 2 and the depth D (mm) of the lower end of a nugget (melted then coagulated part) at the tip of the lug 2, the thickness of the lug 2 is specified in the region of T>=1.1-D/6. The lug is surely welded in a burning method, and anodic corrosion of the lug in the exposed part is retarded to enhance the reliability and safety of a battery.</p> |
