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Hermetic Seal Technology, Inc.
2150 Schappelle Lane
Cincinnati, OH 45240
Phone: 513.851.4899
Fax: 513.851.4817
All Categories > Welded & Brazed Parts for Battery Seals  

Welded & Brazed Parts for Battery Seals

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Our experience and expertise in hermetic welding plus brazing allows us to offer range of glass-to-metal seals for the healthcare, military, aerospace, electronic, and automotive industries. Using resistance welding we are able to hermetically join glass seals to metal surfaces. To ensure the high hermeticity of the seals, we take into consideration factors such as the type of materials used in the welding process and the temperature to which the glass seal is heated.

Our in-house welding and testing capabilities enable us to produce leak-tight hermetic assemblies. In addition to welded glass-to-metal seals, we also produce hermetically brazed assemblies. By hermetic brazing, HST manufactures leak-tight seals. Regardless of the processing approach we adopt, be it welding or brazing, all our hermetically sealed components are subject to 100% leak tests. We guarantee a hermeticity of 1 x 10-8 cc/sec on all our welded or brazed seals.



  • All types of Lithium batteries
  • Industrial
  • Military
  • Automotive
  • Aerospace
  • Sensors, Consumption Meters, Cameras, and Computers
  • Shell Materials

    Other Materials Available on Request
    Stainless Steel


    Pin Materials

    52 Alloy (Ni/Fe alloy)
    Copper Core 446 or 52 alloy



    Stainless Steel

    Other Materials Available Upon Request

    Glass Materials

    Cabal 12 and other low silica glass

    Corning 9010

    Corning 9013

    HST Custom Lithium Corrosion Resistant Glass


    Other Borosilicate, Barium Alkali, and Soda-Lime glass


    Leak Checking
    Resistance Welding

    Plating Options

    And Many Others
    Copper Plating

    Electroless Ni Plating

    Electrolytic Ni Plating

    Hard Gold Plating

    Pure Gold Plating

    Silver Plating

    Welding Considerations

  • The type of materials used in the welding process
  • Heat shock applied to the glass seal during the welding process
  • Hermetic Brazing Materials

    Mild Steel
    Stainless Steel

    Types of Joints (Brazing)

    Butt Joints
    Lap Joints

    Rod-in-tube Joint

    Tube-in-tube Joint

    Bond Strength (Brazing)

    Dependant on specifications and configuation of part


    Hypot (High Voltage) Testing / Breakdown Voltage
    Insulation Resistance Testing (Isolation)

    Less than 1 x 10-8 cc/sec helium leak rate (100% tested)


    1 x 10-8 cc/sec helium leak rate

    Production Capability

  • We have the ability to handle orders from ten parts to millions of parts
  • We can also do sample parts
  • Industries Served






    Oil Exploration


    Quality Control

    ISO Compliant


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Technology Inc.