1. Different application conditions
(1) On the finished product of the rechargeable battery
For mobile phone batteries, it is generally only a single lithium cell, so the balance between multiple cells does not need to be considered in terms of battery protection, and the safety factor is higher than that of a battery composed of multiple cells. The battery energy density can be improved to a certain extent. The drone battery is generally composed of two or more lithium cells through the mutual cooperation of series and parallel to achieve a certain voltage and capacity value to meet the needs of the drone. In this case, the function of the battery protection board And the performance requirements will be higher. In order to reduce the data error (capacity difference, internal resistance difference, voltage difference, etc.) between the cells, the capacity density of the battery must be reduced to a certain extent in exchange for the "consistency" of the cells. better question.
(2) In terms of battery discharge
For mobile phone batteries, the discharge current is generally not large, and the size is very stable, which is conducive to improving the energy density per unit volume of the battery, while for drone batteries, the discharge current is generally relatively large, and The discharge current is also sometimes large and sometimes small (sometimes high-speed driving, sometimes slow-speed driving). In order to meet a certain service life and safety of the battery, coupled with the collaborative work requirements of multiple cells, these all require drones. Batteries need to be taken care of by reducing the energy density per unit volume.
The battery of the drone is used frequently and the discharge current is large
From the actual use, if you pay attention, the battery life of the mobile phone is basically more than three years, and the battery of the drone is scrapped in about half a year or a year, mainly because the battery of the drone is not only because of the number of cells The battery life is not very long in general, and the usage is much more complicated than that of the mobile phone when the current is discharged and the battery is used frequently.
The application of drone battery
2. In terms of the manufacturing process
Because of the different needs of the actual use, the different requirements for the discharge performance of the battery will lead to different requirements for the battery production and manufacturing process. Naturally, under the same volume, the difference in capacity is very large.
If it is disassembled from the battery pole piece, and the pole piece of the same size is weighed, the mobile phone battery is heavier than the drone battery. In terms of compaction density, the battery of the mobile phone is more compact than the battery of the drone, because the drone needs to achieve high-current discharge, the compaction density is smaller, because the material reaction will be more violent under the high-current discharge, and the material density If it is too large, it is easy to be broken when the temperature rises, which directly causes the battery to be scrapped;
UAV batteries are generally used relatively frequently
3. From the ratio of raw materials for battery production
In addition, although mobile phone batteries and drone batteries are both lithium batteries, the ratio of raw materials they use is different. For example, the electrolyte is different. The drone battery uses heat-resistant and easy-to-dissipate heat, while the mobile phone does not need it.
In fact, the application of lithium batteries is mainly determined according to the actual application requirements of electronic equipment. Different power requirements, there will be certain differences in the production process and raw materials of lithium batteries.
The above is the fundamental reason why the battery capacity of mobile phones is larger than that of drones under the same volume.
