3.6V ER17505M Li-SoCl2 Battery 2800 mAh | Pkcell

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Passivation is an interesting natural phenomenon observed in Lithium Thionyl Chloride (LiSO₂Cl₂) batteries! When lithium metal touches the thionyl chloride (SOCl₂) electrolyte, a thin, protective layer forms on the surface of the lithium negative electrode. This layer, mostly made up of Lithium Chloride (LiCl), creates a high-resistance barrier that prevents a continuous reaction between the lithium and the electrolyte. Isn't it fascinating how this process helps maintain the battery's performance?

Passivation has some excellent benefits along with a few potential drawbacks that are important to consider:

Benefits:

• Low Self-Discharge: The passivation layer does a fantastic job of slowing down any unwanted side reactions between the lithium and the electrolyte, leading to an impressively low self-discharge rate. Thanks to this, LiSO₂Cl₂ batteries can be stored for many years, often over 10 years, while still keeping most of their capacity intact.
• Long Shelf Life: Because of the low self-discharge, these batteries can hold onto their energy for quite an extended period, which is great for long-term storage.

Potential Drawbacks:

• Voltage Delay: When a passivated battery starts discharging—especially after being stored or during high-current pulses—the current first needs to break through or dissolve the high-resistance passivation layer. This can temporarily drop the battery's voltage below its normal operating level before it bounces back. This occurrence is often referred to as "voltage delay."

 Due to its high energy density, extended life, and superior pulse capability, the ER17505M battery is widely adopted in various industrial and professional applications. These include smart utility metering (e.g., electricity, gas, and water meters with wireless communication modules), GPS asset tracking devices, remote monitoring systems, security sensors and alarms, industrial IoT devices, and memory backup for programmable logic controllers (PLCs) or other industrial equipment that require intermittent high power.

The ER17505M offers several significant advantages for demanding applications:

• High Pulse Current Capability: Its spirally wound design allows it to provide strong current pulses, essential for radio transmission or activating components.
• High Energy Density: It stores a substantial amount of energy in a compact A-size cell, providing long operational life.
• Exceptional Shelf Life: With a very low self-discharge rate (often less than 1% per year), it can typically be stored for 10-20 years.
• Stable Voltage: It delivers a consistent 3.6V throughout most of its service life, critical for the stable operation of electronic devices.
• Wide Operating Temperature: Performs reliably in harsh environments, usually from -55°C to +85°C.

No, the ER17505M is a primary (non-rechargeable) battery. It is designed for single use only. Attempting to recharge this type of battery is extremely dangerous and can lead to severe consequences such as leakage, overheating, fire, or even an explosion. Always replace depleted ER17505M batteries with new ones.

The primary distinction lies in their internal construction and performance profile regarding current delivery. A standard ER17505 typically uses a bobbin-type construction, which is optimized for very low, continuous current drains and maximum overall longevity. The ER17505M, with its spirally wound construction, is engineered to provide significantly higher current pulses, making it better suited for applications that have intermittent demands for more power, such as sending data wirelessly.

While generally safe when used correctly, it's vital to adhere to these safety guidelines:

• Never try to recharge these batteries.
• Avoid short-circuiting the battery terminals, as this can cause rapid heat generation and potential hazards.
• Do not puncture, crush, disassemble, or expose the battery to temperatures outside its specified operating range or to open flame.
• Store batteries in a cool, dry place, away from direct sunlight, moisture, or extreme heat.
• Ensure proper disposal of used or damaged batteries according to local regulations for lithium batteries.
• Keep batteries out of reach of children and pets to prevent accidental ingestion or misuse.