Improved lead acid storage battery and method of bonding cell terminal posts and bushings

• Main Authors: KUMP, WILLIAM H, WILLING, RODGER, LUND, DAVID L
• Format: Patent
• Language: English; French; German
• Published: 13.09.2006
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A lead acid storage battery (10) and improved method of bonding battery cell terminal posts (22) to cover bushings (21) is disclosed. The battery cell terminal posts (22) are made of lead alloy material and the cover bushings (21) are made of solder alloy material having a significantly lower melting point than the terminal posts (22). The bushings (21) are bonded to the terminal posts (22) by heating the terminal posts (22) and bushings (21) to a temperature above the melting point of the material of the bushing (21), but below the melting point of the post (22), to effect a secure and leak proof connection without melting of the terminal posts (22) and with lesser chance for damage to the plastic cover (20). The plastic cover (20) further includes integrally formed annular mold sections (45) in the form of upstanding bosses (46) which completely surround respective bushings (21) and posts (22) to contain melted material of the bushings (21) during the heating operation and to form the terminals (22) into final shape.