3V CR17505 LiMnO2 Battery for smart electricity meters, wireless smoke detectors, security alarm systems, industrial PLC memory backup

Mechanical sealing batteries feature built-in safety mechanisms like PTCs and air vents, making them safe for retail consumers. Conversely, welding seal designs lack these internal protections and are strictly for professional use. Always choose mechanical sealing for everyday consumer electronics to ensure safety.

Mechanical Sealing Structure: This design incorporates specific safety components (highlighted in red), including an explosion-proof hole, a PTC device, and an explosion-proof film (bursting disc). These protective features are designed to safely vent high internal pressure, ensuring the battery will not explode. Welded Seal Structure: This alternative design is sealed using argon arc welding and utilizes components like a steel ball, glass, and an insulator plate. Because it lacks the pressure venting mechanisms found in the mechanical seal, this structure carries a risk of explosion if the battery’s internal pressure becomes too high.

After a 24-hour, 70°C shelf test, both VTC CR17505 semi-sealed and competitors’ fully sealed batteries showed zero leakage and negligible weight change. Notably, VTC’s semi-sealed batteries maintained significantly lower internal resistance compared to the fully sealed alternatives.

In the 24-hour high-temperature shelf test, both VTC CR17505 semi-sealed and competitors’ fully sealed batteries showed zero leakage and minimal weight change (≤0.03%). Notably, VTC’s semi-sealed batteries consistently maintained a much lower internal resistance than the fully sealed alternatives.

Following a rigorous 10-cycle thermal shock test (alternating between 75°C and -40°C), VTC CR17505 semi-sealed batteries demonstrated excellent stability with zero liquid leakage and minimal weight loss (≤0.04%). The test concludes that both mechanical and welded sealing structures provide excellent leakage resistance.

According to Van’t Hoff’s law, for every 10℃ rise in temperature, the rate of chemical reaction increases by a factor of 2 to 4. According to this kinetic law of chemical reaction and battery production practice, it is generally believed that battery storage at 60 ℃ for
20 days is equivalent to1 year at room temperature.
In the actual production process, we also usually use this method to test and evaluate the service life of the product.

Plant E products show a significant decrease in OCV and CCV and a significant increase in IR with increasing shelf life.

The discharge capacity of Plant E products decreases significantly with shelf life;
VTC products have no significant change in performance parameters and can ensure a 10-year service life.

Under high internal pressure, mechanical sealing structures deform and safely rupture their bursting discs to relieve pressure, preventing an explosion. Conversely, welding seal structures lack a venting mechanism; pressure continues to build until the battery eventually explodes.