The Lowdown on Lithium Battery Seals

Lithium battery seals are critical components in many types of batteries. From medical equipment to weapons control systems, these batteries must serve as essential power sources. With durability, dependability and power output as important performance indicators, batteries’ seals should adequately support their functionality. In this short guide, you’ll learn about the advantages of battery seals constructed from lithium.

Benefits of Lithium Battery Seals

Battery end seals serve an important function: keeping a battery’s electrolyte and internal components inside its housing. A battery end seal ensures that its power cell stays reliable, functional and safe for ongoing use. Battery seals come in a wide range of materials:

  • Titanium alloys
  • Stainless steel
  • Aluminum
  • Steel alloys
  • Lithium

Complete Hermetics manufactures several lithium battery glass-to-metal sealed lid products. Glass-to-metal seals offer unique advantages. Their construction creates a reliable high-quality seal that withstands exposure to harsh conditions, including temperatures between -40°C and +150°C. They also resist humidity extremes, electrochemical corrosion, pressure variation and high-voltage electrical currents. Lithium seals offer excellent performance in all these areas, along with offering a longer shelf life.

Your Source for Lithium Battery Seals

Complete Hermetics custom crafts glass-to-metal and ceramic-to-metal seals, as well as hermetic seals and feedthroughs. Through engineering and manufacturing excellence, we deliver superior-grade products meeting strict quality standards. Request an online quote now or call us at (714) 265-1238.

Titanium headers

A Quick Overview of Battery End Seals


Battery end seals play important roles in battery life, functionality and power delivery. They create tight seals that stop any unusual loss of electrical energy. With missing or damaged end seals, batteries lose power faster than usual and their typical lifespans decrease.

Lithium Battery Sealed Lids

Hermetic seal technology is key with lithium battery sealed lids. Glass-to-metal sealing techniques require both the glass and the metal to have similar thermal expansion properties to ensure a solid seal when the pieces cool down.

To create a hermetic seal, glass must first be heated to a molten consistency. This occurs at between 1,400 and 1,600 degrees Celsius. Once this happens, the glass can be wetted to the metal. Wetting contacts a liquid with a solid surface through intermolecular interactions. Cohesive and adhesive forces must balance adequately for wetting to succeed.

When the glass-to-metal sealing process is complete, you have a high-quality seal that can handle extreme conditions. Besides mitigating power loss, a good hermetic seal also protects against water and foreign body entry.

Dependability and Durability

Lithium batteries have a wide range of applications. Both durability and reliability are key when it comes to battery end seals. Whether on batteries powering pacemakers, weapons systems or other critical pieces of equipment, Complete Hermetics produces consistently high-quality hermetically sealed components.