US2004033157A1PendingUtilityA1

Alloy for battery grids

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Assignee: JOHNSON CONTROLS TECH COPriority: Aug 13, 2002Filed: Aug 13, 2002Published: Feb 19, 2004
Est. expiryAug 13, 2022(expired)· nominal 20-yr term from priority
Inventors:Charles J. Schaeffer
H01M 4/72H01M 4/685C22C 11/06C22C 9/02Y02E60/10
45
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Claims

Abstract

A lead alloy for a grid for a battery is disclosed. The alloy includes calcium in an amount of about 0.05 percent by weight to about 0.0725 percent by weight, tin in an amount of about 1.2 percent by weight to about 1.8 percent by weight, silver in an amount of greater than about 0.001 percent by weight, and bismuth in an amount of about 0.0005 percent by weight to less than about 0.04 percent by weight. An alloy for a grid for a battery is also disclosed having calcium in an amount of about 0.05 percent by weight to about 0.07 percent by weight, tin in an amount of about 1.2 percent by weight to about 1.5 percent by weight, silver in an amount of greater than about 0.001 percent by weight and bismuth in an amount of greater than about 0.0115 percent by weight.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A lead alloy for a grid for a battery consisting essentially of: 
 calcium in an amount of about 0.05 percent by weight to about 0.0725 percent by weight;    tin in an amount of about 1.2 percent by weight to about 1.8 percent by weight;    silver in an amount of greater than about 0.001 percent by weight;    bismuth in an amount of about 0.0005 percent by weight to less than about 0.04 percent by weight;    wherein the balance of the alloy comprises lead.    
     
     
         2 . The alloy of  claim 1  wherein the calcium is in an amount of about 0.055 percent by weight to about 0.07 percent by weight.  
     
     
         3 . The alloy of  claim 2  wherein the calcium is in an amount of about 0.06 percent by weight to about 0.07 percent by weight.  
     
     
         4 . The alloy of  claim 1  wherein the tin is in an amount of about 1.2 percent by weight to about 1.65 percent by weight.  
     
     
         5 . The alloy of  claim 1  wherein the ratio of the calcium to the tin is greater than about 12 to 1.  
     
     
         6 . The alloy of  claim 1  wherein the silver is in an amount of about 0.001 percent by weight to about 0.015 percent by weight.  
     
     
         7 . The alloy of  claim 6  wherein the silver is in an amount of about 0.001 percent by weight to about 0.01 percent by weight.  
     
     
         8 . The alloy of  claim 7  wherein the silver is in an amount of about 0.001 percent by weight to about 0.005 percent by weight.  
     
     
         9 . The alloy of  claim 8  wherein the bismuth is in an amount of about 0.0005 percent by weight to about 0.0275 percent by weight.  
     
     
         10 . The alloy of  claim 9  wherein the bismuth is in an amount of about 0.0005 percent by weight to about 0.0225 percent by weight.  
     
     
         11 . The alloy of  claim 10  wherein the bismuth is in an amount of about 0.001 percent by weight to about 0.0190 percent by weight.  
     
     
         12 . The alloy of  claim 11  wherein the bismuth is in an amount of greater than about 0.0115 percent by weight.  
     
     
         13 . An alloy for a grid for a battery consisting essentially of: 
 calcium in an amount of about 0.05 percent by weight to about 0.07 percent by weight;    tin in an amount of about 1.2 percent by weight to about 1.5 percent by weight;    silver in an amount of greater than about 0.001 percent by weight;    bismuth in an amount of greater than about 0.0115 percent by weight;    wherein the balance of the alloy comprises lead.    
     
     
         14 . The alloy of  claim 13  wherein the silver is in an amount of about 0.001 percent by weight to about 0.015 percent by weight.  
     
     
         15 . The alloy of  claim 14  wherein the silver is in an amount of about 0.001 percent by weight to about 0.01 percent by weight.  
     
     
         16 . The alloy of  claim 15  wherein the silver is in an amount of about 0.001 percent by weight to about 0.005 percent by weight.  
     
     
         17 . The alloy of  claim 14  wherein the bismuth is in an amount of less than about 0.0275 percent by weight.  
     
     
         18 . The alloy of  claim 17  wherein the bismuth is in an amount of less than about 0.0225 percent by weight.  
     
     
         19 . The alloy of  claim 18  wherein the bismuth is in an amount of less than about 0.019 percent by weight.  
     
     
         20 . The alloy of  claim 19  wherein the bismuth is in an amount of about 0.015 percent by weight to about 0.0165 percent by weight.  
     
     
         21 . A method of producing an alloy for use in a battery grid comprising: 
 alloying lead with calcium, tin, silver and bismuth;    wherein the alloy consists essentially of: 
 calcium in an amount about 0.05 percent by weight to about 0.0725 percent by weight;  
 tin in an amount of about 1.2 percent by weight to about 1.8 percent by weight;  
 silver in an amount of greater than about 0.001 percent by weight;  
 bismuth in an amount of 0.0005 percent by weight to less than about 0.0275 percent by weight;  
 the balance of the alloy comprising lead.

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