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Hermetic Seal Technology, Inc.
2150 Schappelle Lane
Cincinnati, OH 45240
Phone: 513.851.4899
Fax: 513.851.4817
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Lithium Battery Seals

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Hermetic Seal Technology (HST) has been setting the standards for custom glass-to-metal seals, especially lithium battery seals, since 1994. We have specially formulated Lithium corrosion resistant glass to greatly reduce corrosion and to isolate lithium electrolytes, such as lithium / manganese dioxide (LiMnO2), lithium / sulfur dioxide (Li/SO2), and lithium / thionyl chloride (Li/SOCl2) in lithium-ion batteries, from foreign agents. HST lithium battery seals can withstand corrosive chemicals, electrical variations, as well as extreme temperatures to give your battery a long shelf life.

For high performance lithium batteries, we fabricate reliable hermetic seals from high-conductivity pin materials, exotic alloys and"both standard and custom formulated lithium battery glasses. We specialize in consistently processing lithium compatible glass materials including Cabal 12, TA-23, and Babal. Sealing hermetic glass to stainless steels or pure metals such as titanium and molybdenum, is our specialty.

Our extensive sealing and welding capabilities enable us to seal into an eyelet, seal directly into the battery lid, or even hermetically weld the eyelet into the lid. We specially design eyelets that can be either resistance-welded or laser welded into the battery lid. With in-house hermeticity testing capabilities, HST performs 100% leak checks on all parts to guarantee that the seal is hermetic to better than 1 x 10-8 cc/sec helium.


Types of Lithium-ion Battery Systems

Lithium / Iodine
Lithium / Manganese Dioxide (LiMnO2)

Lithium / Molybdenum Disulfide

Lithium / Thionyl Chloride (Li/SOCl2) Lithium / Sulfur Dioxide (Li/SO2)


  • Oil Exploration and Down Hole monitoring
  • Lithium Systems in Communication Systems, Torpedoes, and Missiles
  • Medical Lithium Battery Applications for Implantable Defibrillators, Pacemakers, Neurostimulators, and Drug Infusion Systems
  • Lithium Batteries in Consumption Meters, Memory Back-up, Portable Diagnostic Equipment, and Emergency Locator Transmitters
  • Body Materials

    Mild Steel
    Stainless Steel


    Pin Materials

    52 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


    Glass Formulation

    Glass Sealing

    Resistance Welding


    Hermeticity Testing (100 % leak tests are performed on all seals)
    Hypot (High Voltage) Testing / Breakdown Voltage

    Insulation Resistance Testing (Isolation)

    Outsourced Services

    Electrochemical Corrosion Testing
    Glass Smelting

    Humidity Testing

    Laser Welding



    Salt Spray Testing



    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
  • HST can help you with free hermetic seal design and development to insurance you have a reliable and robust glass to metal seal
  • Glass-to-Metal Seal Advantages

  • Withstands corrosive chemicals, extreme temperature, electrical current, and pressure variations
  • Ensures long life of the battery
  • Hermetic seals isolate lithium batteries from foreign contaminants
  • Our specially formulated glass materials have high corrosion resistance and molecular adhesion properties
  • Our "Clean- Seal" technology ensures the high quality of glass-to-metal parts that are free from oxidation and chemical residue that can effect welding and material corrosion resistance
  • Industries Served






    Oil Exploration


    Companies Using HST Seals


    Quality Control

    ISO Compliant


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