In the model lithium battery, the single cell voltage of 3.7V is the rated voltage, which is obtained from the average working voltage. The actual voltage of a single lithium cell is 2.75~4.2V, and the capacity marked on the lithium cell is the power obtained by discharging 4.2V to 2.75V. Lithium battery must be kept in the voltage range of 2.75~4.2V. If the voltage is lower than 2.75V it is over discharged, the LiPo will expand and the internal chemical liquid will crystallize, these crystals may pierce the internal structure layer causing short circuit, and even make the LiPo voltage become zero. When charging the single piece of voltage higher than 4.2V is overcharging, the internal chemical reaction is too intense, the lithium battery will bulge and expand, if continue charging will expand and burn. So be sure to use the regular charger to meet the safety standards for battery charging, while strictly prohibited to the charger for private modification, which may cause very serious consequences!
Also tip, remember not to aerial power single cell voltage to 2.75V, at this time the battery has not been able to supply the aircraft with effective power to fly, in order to fly safely, the single cell alarm voltage can be set to 3.6V, such as to reach this voltage, or close to this voltage, the flyer must immediately perform the return or landing action, as far as possible to prevent the battery voltage is insufficient to cause a bomb.
Why is the model battery bulging, how should it be repaired after bulging, and how to judge whether it can be repaired? Generally speaking, after the model battery bulge that is unable to continue to use, this is usually no matching charging equipment is so, in fact, the use of active equalization charger, model battery bulge after any can continue to use. But certainly and the normal battery will be a little different. Because the capacity has been inconsistent.
The discharge capacity of the battery is expressed in multiples (C), which means the maximum discharge current that can be achieved according to the nominal capacity of the battery. Common batteries for aerial photography are 15C, 20C, 25C or higher C number of batteries. As for the C number, simply put, 1C is different for different capacity batteries. 1C means that the battery can work continuously for 1 hour with a discharge rate of 1C. Example: 10000mAh capacity battery can work continuously for 1 hour, then the average current is 10000mAh, i.e. 10A, 10A is 1C of this battery, then if the battery is marked with 10000mAh25C, then the maximum discharge current is 10A×25=250A, if it is 15C, then the maximum discharge current is 10A×15=150A, from this we can see The higher the C-number, the higher the battery will be able to supply more current support according to the moment of power consumption, and its discharge performance will be better, of course, the higher the C-number, the higher the price of the battery will be. Here we should pay attention to never exceed the battery discharge C number for discharge, otherwise the battery may be scrapped or burned and exploded.
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