Views: 212 Author: Hedy Publish Time: 2023-07-21 Origin: Site
Lithium thionyl chloride batteries (Li/SOCl2) are a kind of lithium primary cell. These cells, unlike lithium ion or lithium polymer batteries, cannot be recharged once they have been discharged. However, because of their lengthy lifespan, this feature is of minimal consequence in ordinary use. Indeed, lithium thionyl chloride batteries may run applications for months or even years before needing to be replaced.
For many years, Jauch's battery portfolio has included Li/SOCl2 batteries. This year, the offering was expanded to include Jauch's own brand batteries. The most critical characteristics of this cell chemistry are summarized here.
The cell voltage of lithium primary cells, also known as lithium iron sulfide or lithium manganese dioxide batteries, is typically between 1.5 and 3 volts. The cell voltage of a lithium thionyl chloride battery, on the other hand, is substantially higher: 3.6 volts. The battery performs at the level of lithium ion batteries at this value. The battery maintains this voltage level practically throughout the discharge phase, which is a distinct selling advantage of lithium thionyl chloride cell chemistry.
Li/SOCl2 batteries outperform all other primary cells in terms of energy density. It is feasible to get values of up to 710 watt hours/kilogram.
Diagram of the discharge characteristics of a lithium thionyl chloride battery
Constant voltage: Li/SOCl2 batteries maintain a constant voltage of 3.6 volts until nearly fully discharged.
Lithium thionyl chloride batteries are employed when low currents over long periods of time are required.Locking cylinders, timers, toll systems, and various metering applications are examples of typical uses. Because of the high energy density of the thionyl chloride cells, these applications can run for months or even years without needing to replace the battery.
Lithium thionyl chloride batteries are intended to be used at temperatures ranging from -60 to +85 degrees Celsius.The cells' performance at low temperatures is particularly impressive. Even at negative double digit temperatures, the cells maintain a steady high voltage.
Diagram of a lithium thionyl chloride battery's voltage-temperature ratio Temperature: Even at double-digit sub-zero temperatures, Jauch Li/SOCl2 batteries successfully produce high voltages.
Lithium thionyl chloride batteries are extremely long lasting and have a very long shelf life. The annual self-discharge rate of barely 1% speaks for itself.
The chemistry of the cell is responsible for the lifespan of lithium thionyl chloride batteries. The lithium thionyl chloride cell, unlike other lithium primary cells, involves a chemical interaction between the lithium anode and the electrolyte. As a result, a protective coating develops on the lithium anode, obstructing ion transport between the anode and cathode. This process is known as "passivation" of the battery cell.
This phenomena has both benefits and drawbacks.On the one hand, passivation is responsible for the battery's low self-discharge rate. However, when the battery is turned on, the resultant protective coating initially obstructs current passage. As the battery continues to work, the protective layer eventually goes away. However, it reforms as soon as the battery no longer draws electricity. As a result, lithium thionyl chloride batteries are particularly well suited to low-power consumption applications. The application's power requirements might be either steady or pulse-shaped.