Welded Battery Lids

When it comes to guaranteeing hermeticity for critical applications, Hermetic Seal Technology stands as the unrivaled solution provider. Trust us to elevate your battery sealing solutions to the highest standards of excellence. Contact us today to discuss your requirements and experience the difference with HST!

Welded Battery Lids

At Hermetic Seal Technology (HST), we specialize in providing top-notch welded battery lids that meet the stringent demands of various industries including healthcare, military, aerospace, electronics, and automotive sectors.

Here’s why our welded battery lids stand out:

  1. Expert Welding Capabilities: With our wealth of experience and expertise in hermetic welding and brazing, we deliver a diverse range of glass-to-metal seals tailored to your specific application needs.
  2. Precision Resistance Welding: Utilizing advanced resistance welding techniques, we seamlessly join glass-to-metal seals to battery lids while ensuring high hermeticity. Our meticulous attention to detail considers material types, component design, and welding parameters to prevent any damage to the seals during the welding process.
  3. Brazed Leak-Tight Assemblies: Beyond welding, HST excels in producing brazed leak-tight assemblies, offering flexibility in joining various components and materials with utmost precision.
  4. Stringent Quality Assurance: All our welded and brazed packages undergo rigorous 100% leak tests, guaranteeing hermeticity better than 1 x 10-8 cc/sec of helium. We meticulously inspect both the weld (or braze) and the glass-to-metal seal to ensure impeccable quality and reliability.

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.


  • Brazing
  • Glass Formulation
  • Glass Sealing
  • Resistance Welding

Glass-to-Metal Seal Advantages

HST hermetic seals are hermetic (leak – tight) to isolate lithium batteries from external moisture and foreign contaminants to ensure long battery life
HST glass seals can resist extreme temperature and pressure variations while maintaining hermeticity. Our specially formulated glass materials have high corrosion resistance to lithium electrolytes eliminating glass corrosion which reduces shelf life.

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


  • Lithium / Manganese Dioxide (LiMnO2)
  • Lithium / Silver chromate (Li-Ag2CrO4)
  • Lithium / Silver oxide+vanadium pentoxide (Li-Ag2V4O11 )
  • Lithium / Sulfur Dioxide (Li/SO2)
  • Lithium / Sulfuryl Chloride (Li-SO2Cl2)
  • Lithium / Thionyl Chloride (Li/SOCl2)
  • 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
  • Mild Steel
  • Stainless Steel
  • Titanium
  • 52 Alloy
  • Copper Core 446 or 52 alloy
  • Molybdenum
  • Platinum-Iridium
  • Stainless Steel
  • Other Materials Available Upon Request
  • Babal
  • Cabal 12 and other low silica glass
  • Corning 9010
  • Corning 9013
  • HST Custom Lithium Corrosion Resistant Glass
  • TA-23
  • Other Borosilicate, Barium Alkali, and Soda-Lime glass
  • Hermeticity Testing (100 % leak tests are performed on all seals)
  • Hypot (High Voltage) Testing / Breakdown Voltage
  • Insulation Resistance Testing (Isolation)
  • Electrochemical Corrosion Testing
  • Glass Smelting
  • Humidity Testing
  • Laser Welding
  • Machining
  • Plating
  • Salt Spray Testing
  • Stamping

1 x 10^8 cc/sec helium leak rate

All HST seals are 100% leak tested to ensure quality and performance

Industries Served






Companies Using HST Seals

Quality Control

Contact Hermetic Seal Technology Today

Elevate your projects with HST’s welded battery lids! Expert welding and brazing ensure top-notch hermeticity. Trust in our meticulous craftsmanship. Contact us today!