Battery Lids and Connectors
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Technical Details of Battery Lids and Connectors

SCHOTT glass-to-metal sealing has been the technology of choice for more than 20 years for primary lithium and industrial grade lithium-ion batteries. Based on this expertise, SCHOTT GTAS®, the world’s first glass-to-aluminum sealing technology, was specifically developed for long-lasting lithium-ion batteries and capacitors. Glass-to-metal seals are a reliable method of creating long-life seals capable of operating in a broad range of conditions. These seals can withstand electrical current, temperature, pressure variations, and corrosive chemicals.

Made to last. Made to protect

High temperature stability

Depending on design and material combination, SCHOTT battery and capacitor lids can endure temperature ranges from -60°C to +150°C. SCHOTT lids have a high compressive loading on the glass and pin that remains intact even in drastic temperature changes (as long as the entire cover is exposed evenly).

Chemical and electrolyte resistance

Over the years, SCHOTT has worked with customers to develop specialty glasses and tailor-made combinations with metal to fit common chemistries. This has enabled SCHOTT battery and capacitor glasses to exhibit optimal electrolyte corrosion resistance and HF resistance.

Mechanical robustness

SCHOTT battery and capacitor lids are designed as 'compression seals'. Compression sealing takes place when the glass and metal have different coefficients of thermal expansion and the metal shrinks around the solidified glass. Because glass is extremely strong in compression, compression seals can withstand extremely high pressures and physical stress, such as mechanical and thermal shock.

Long-lasting gas-tightness

Glass-to-metal sealed battery and capacitor covers are based on the hermetic meld of glass and metal parts (usually < 1E-8 mbar l/s). Due to the inorganic nature of glass and metal, the level of hermeticity remains consistent over many years, enabling stable battery performance for 15 years or longer.
Specifications

Specifications


 Lithium Primary Battery Covers Lithium-Ion Battery Covers SCHOTT Minicaps™ Ultracapacitor/ Aluminum Electrolyte Capacitor Covers  Battery connector
Gas-tightness 1 x 10-8mbar x l/s 1 x 10-8mbar x l/s
 1 x 10-8mbar x l/s 1 x 10-8mbar x l/s  1 x 10-8mbar x l/s
Electrical Isolation 108Ω to 109Ω

Small designs:108Ω to 109Ω

Large designs:107Ω to 108Ω

 1010Ω

Small designs:108Ω to 109Ω

Large designs:107Ω to 108Ω


 108Ω to 109Ω
Chemical resistance High, against wide range of standard electrolytes incl. LiSO2, LiSOCL2, LiMnO2 High, against range of standard electrolytes
 High, against range of standard electrolytes High, against range of standard electrolytes High, against range of standard electrolytes
Temperature stability High:
from -65 °C to + 150 °C		 High:
from -65 °C to + 150 °C		 High:
from -40 °C to + 150 °C		 High:
from -40 °C to + 150 °C		 High:
from -65 °C to + 150 °C
Pressure tightness Very high High to very high, depending on dimension 10 N to 100 N and more, depending on design High to very high, depending on dimension Very high
Mechanical strength Very high High to very high, depending on dimension 10 N to 100 N and more, depending on design High to very high, depending on dimension Very high
Sealing material Glass Glass Glass Glass Glass
Pins Steel, Nickel Iron Alloys Aluminum, Copper, Steel, Nickel Iron Alloys Stainless Steel/ Nickel Alloy Aluminum Stainless Steel/ Nickel Alloy
Lid Steel, Stainless Steel Aluminum, Stainless Steel Stainless Steel Aluminum, Copper Steel, Stainless Steel
Lifetime Up to 25 years Up to 25 years Up to 25 years
 Up to 25 years Up to 25 years 

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Whether you need more information, samples, a quote, or advice for a project, I would be delighted to talk to you.

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Claire Buckwar, Sales Manager
Claire Buckwar

Head of Strategic Business Field Battery