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Basic safety of battery circuits

From:CTECHI GROUP Limited     Release time:2019-04-18

Overview:In order to reduce the global risks and safety of batteries in transportation, storage and operation of batteries, the safety regulations for nickel-based and lithium-based batteries and batteries for portable applications in the United States in 2012 were unified under IEC 62133. The most basic safety device in a 3.6V 2000mah Li-SOCl2 battery is a fuse that opens at high currents.

In order to reduce the global risks and safety of batteries in transportation, storage and operation of batteries, the safety regulations for nickel-based and lithium-based batteries and batteries for portable applications in the United States in 2012 were unified under IEC 62133. The most basic safety device in a 3.6V 2000mah Li-SOCl2 battery is a fuse that opens at high currents. Some fuses are permanently turned on, making the battery useless. The positive temperature coefficient (PTC) is a resettable device that creates a resistor with a high overcurrent and returns to a low ON position when the condition is normalized. More protective layers are solid-state switches that measure current and voltage, and if the value is too high, the circuit is broken. The lithium ion protection circuit works on this on/off basis. All switching devices have a residual resistance, resulting in a slight increase in overall battery resistance followed by a voltage drop.

Safety is paramount when using electronic equipment in hazardous areas. Intrinsically Safe (IS) ensures innocuous operation in areas where sparks can ignite flammable gases or dust (hazardous areas include refineries, chemical plants, grain elevators and textile mills.) All electronic equipment entering a hazardous area must be intrinsically safe of. This includes two-way radios, mobile phones, laptops, cameras, flashlights, gas detectors, test equipment and medical instruments, even with AA and AAA batteries. Intrinsically safe equipment and batteries contain protection circuitry to prevent overcurrent, resulting in high temperatures, sparks and explosions. If you want to learn more about Lithium Manganese Dioxide battery for digital cameras,you can contact us.


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