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How to judge the state of charge of the battery?

How to judge the state of charge of the battery?
Update Time:2019-05-14

Power adapters are ubiquitous in our lives. Mobile phones, electric vehicles, and computers all require it. Power adapters can be said to be widely used. The power adapter is mainly to provide energy for the electronic device, so how to determine whether the battery is full during use?


Power adapters are ubiquitous in our lives. Mobile phones, electric vehicles, and computers all require it. Power adapters can be said to be widely used. The power adapter is mainly to provide energy for the electronic device, so how to determine whether the battery is full during use? The following is how the charger can tell you whether the battery is fully charged:


In the process of charging the power adapter, it usually takes a while to judge whether the battery is full, instead of judging it immediately, usually by judging the way the power is supplied.


At present, the more mainstream and generally accepted more accurate methods of judgment are - ΔV and 0 ΔV. Under normal circumstances, the judgment of the medium and high-end chargers mainly adopts these two methods. However, after the battery is charged in the charger and the battery is fully charged, if the battery is fully charged, the battery will not appear immediately or a sufficient amount of -ΔV or 0ΔV will appear, but it will take some time to appear. Or, there are enough chargers to judge -ΔV or 0△V, so the smart charger needs some time to identify the battery that has been fully charged.


Conversely, the charger uses the lowest voltage comparison method to determine the "full charge" battery in a shorter period of time because the voltage comparison charger only determines the battery voltage and is judged to be "full" as long as the battery voltage is reached. Usually, at that voltage, the battery still has a lot of space to reach saturation, that is, basically nothing is really full. Therefore, this method of judging is generally only applicable to the lowest power adapter.

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