Zhongtianhe introduces the capacity and energy of lithium-ion batteries
Nowadays, the screens of mobile phones are getting bigger and bigger, and the corresponding power consumption has also increased. Therefore, the battery capacity of a mobile phone has become a very important purchase indicator. After all, no one wants to use a mobile phone while dragging a long charging cable.
Now the unit for measuring the battery capacity of mobile phones is mAh. High school knowledge tells us that this is a unit of electricity, and a voltage is the unit of energy.
Battery energy calculation method:
The energy consumed by the mobile phone is obviously energy, how to measure it with a unit of electricity? ! This is actually because in portable electronic devices such as mobile phones, in order to reduce the size of the battery, the positive electrode of the lithium-ion battery uses lithium cobalt oxide, which has a high compaction density. Because the positive electrode of the mobile phone battery is made of the same material, the voltage of the battery is relatively close (theoretically, it is 3.7V, this specific is related to the process of different battery manufacturers), and there is often only one single cell in the mobile phone. Batteries (please ignore a mobile phone recently released by a mobile phone factory, which contains two 2000mAh batteries). The capacity can actually be used to measure the amount of energy stored in the battery.
But the battery on the computer will be marked with the capacity (power) and energy of the battery at the same time. This is because there is not only one single battery in a computer, there are many batteries in series and parallel connected to form a battery pack, which cannot be measured by the capacity of the battery. High school knowledge tells us: After the batteries of the same model are connected in parallel, the voltage of the battery pack will not change, but the capacity of the battery pack will be increased; if the batteries are connected in series, the capacity of the battery pack will remain unchanged, but the voltage of the battery pack will be increased.
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