Li-SOCl2 battery bobbin type refers to a type of lithium thionyl chloride (Li-SOCl2) battery that is designed in a cylindrical shape with a central core, or bobbin, made of insulating material such as glass-fiber reinforced polypropylene. The electrodes and electrolyte are wound around the bobbin, which is then enclosed in a metal casing. This design allows for high energy density and long life.
Advantages of Li-SOCl2 Battery Bobbin Type
Wide range of sizes
These batteries are available in a wide range of sizes and formats, including button cells, cylindrical cells, and prismatic cells. This makes them suitable for a wide range of applications, from small low-power devices to large high-power applications.
Low self discharge
Li-SOCl2 batteries have a very low self-discharge rate, which means they can hold their charge for a long time without needing to be recharged. This makes them ideal for applications where the battery is required to operate intermittently over a long period.
High voltage
Li-SOCl2 batteries have a high voltage, typically 3.6V. This means fewer batteries are required to achieve a given voltage, reducing the overall weight and size of the battery pack.
High Energy Density
Li-SOCl2 batteries have a high energy density compared to other types of batteries. This means they can store more energy in a smaller space, making them ideal for applications where size and weight are critical.
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Material of Li-SOCl2 Battery Bobbin Type
Li-SOCl2 battery bobbin types typically have a spool-type construction, consisting of a stainless steel or nickel-plated steel spool with a glass-to-metal seal and a cathode composed of a mixture of carbon and thionyl chloride. to improve durability and stability.
Application of Li-SOCl2 Battery Bobbin Type
Electronic toll collection
Li-SOCl2 batteries are commonly used in applications that require high energy density, long life and low self-discharge characteristics. One common application for Li-SOCl2 batteries is in the electronic toll collection systems used on highways and bridges.
Professional electronics
Li-SOCl2 batteries are used in consumer electronics such as digital cameras, wireless headphones, and remote controls due to their high energy density, long shelf life, and low self-discharge rate.
Utility metering
The bobbin type Li-SOCl2 battery is used in smart utility meters to power the communication module. These meters require long battery life and the ability to operate in extreme temperatures.
Security systems
The bobbin type Li-SOCl2 battery is commonly used in security systems, such as burglar alarms and smoke detectors, where long battery life and reliability are essential.
Composition of Li-SOCl2 Battery Bobbin Type
Positive and negative electrodes The positive electrode is composed of metallic lithium and serves as the anode. The negative electrode is made of graphite and serves as the cathode.
Electrolyte The electrolyte is a mixture of lithium tetrachloroaluminate (LiAlCl4), lithium chloride (LiCl), and thionyl chloride (SOCl2). This mixture is highly reactive and produces a high voltage output.
Separator The separator is a thin insulating layer placed between the positive and negative electrodes to prevent short-circuiting. Usually, a porous polyethylene separator is used in bobbin type construction to allow the electrolyte to flow freely.
Bobbin The battery is housed in a plastic or metal bobbin that holds the electrodes and separator together. The bobbin type construction is ideal for applications that require a small and compact battery, such as in electronic devices.
Maintenance Tips for Li-SOCl2 Battery Bobbin Type
Scheduled maintenance
It is recommended to have the battery undergo scheduled maintenance on a regular basis. This will help in detecting and fixing battery issues early on, which prevents further damage to the battery.
Store in a cool and dry place
The Bobbin type Li-SOCl2 battery should always be stored in a cool and dry place to prevent it from getting damaged due to high temperature or humidity. Check the battery voltage several times during storage to ensure it remains above 3.6V.
Maintain the right temperature
Lithium batteries are sensitive to high-temperature conditions. Avoid exposing the battery to high temperatures for prolonged periods as this may result in damage. The optimum temperature range for these batteries is 20°C to 60°C.
Keep the contacts clean
Clean the contacts of the battery and the device regularly. This will help to ensure a good connection between the battery and the device, and prevent any corrosion on the battery terminals.
Working Principle of Li-SOCl2 Battery Bobbin Type
The battery contains a bobbin like structure made of stainless steel. The bobbin is coated with a layer of graphite or carbon to act as the cathode. The anode is made of lithium metal and is compressed against the bobbin to ensure good electrical contact. When the battery is connected to an external circuit, the lithium metal begins to react with the SOCl2 electrolyte. This reaction generates electrons and lithium chloride salt, which remains in the battery as a solid.
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