Analysis on the safe use of lithium batteries in drone aerial photography

Analysis on the safe use of lithium batteries in drone aerial photography. The basic parameters of the battery are as follows. Take the 22.2v10000mAh aerial photography power battery as an example. It is composed of 6 lithium batteries with a rated voltage of 3.7v and a capacity of 10000mAh in series. , Which is often referred to as 6S1P. There is also a 6S2P battery, which consists of 12 5000mAh batteries connected in series. One thing to note here is that 6S1P is more secure than 6S2P, because 1P is twice as simple as 2P, and of course 1P is more expensive. In the lithium battery used in the air model, the voltage of a single chip battery is 3.7v as the rated voltage, which is obtained from the average working voltage. The actual voltage of a single lithium battery is 2.75~4.2v, and the superscript capacity of the lithium battery is discharged from 4.2v to 2.75v. Lithium must be kept within the voltage range of 2.75~4.2v. If the voltage is lower than 2.75v, it is over-discharged. Lithium will expand, and the internal chemical liquid will crystallize, which may pierce the internal structure layer and cause a short circuit, or even make the voltage of lithium zero. When charging, a single chip voltage higher than 4.2v is considered to be overcharged, and the internal chemical reaction is too strong. Lithium batteries will swell and swell, and if they continue to be charged, they will swell and burn. Therefore, you must use a standard charger to charge the battery in accordance with safety standards. At the same time, it is strictly forbidden to modify the charger. This may cause very serious consequences! One reminder, remember that you cannot use air power batteries. The single battery voltage is 2.75V. The battery cannot supply the aircraft effectively. In order to ensure the flight, the single-chip alarm can be set to 3.6V voltage, such as voltage, voltage or close, the pilot action will immediately return to execution or land, try to prevent the battery voltage of the fryer from being insufficient . The discharge capacity of the battery is expressed by a multiple (C), that is, the maximum discharge current that can be reached according to the nominal capacity of the battery. The general antenna battery is 15 degrees, 20 degrees, 25 degrees or higher. As for the C number, simply put, 1C is different for batteries of different capacities. 1C refers to the discharge rate at which the battery can continue to work for 1 hour after 1C discharge. For example: a battery with a capacity of 10000mAh can be used for 1 hour, so the average current is 10000mAh, which is 10A, and 10A is the battery's 1C. Another example is the battery 10000mah25C, then the maximum discharge current is 10*25u003d250, if it is 15 degrees, the maximum discharge current is 10x15u003d150, from now on you can see that the aircraft is flying dynamically, and the C battery can supply more The higher the power consumption of the current support, the better the discharge performance, of course, the higher the number of C, the price of the battery will rise. It should be noted here that the discharge cannot exceed the C number of the battery discharge, otherwise the battery may be scrapped or burned and exploded. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.