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Why do mobile phone batteries have 4 electrodes
sourceCarol
publisherCarol
time2021/12/30
- Mobile phone batteries are detachable. You can also buy a few extra batteries for spares yourself. A careful friend may find that there are three or four exposed electrodes on the phone battery, which are used to contact the phone at this time. Each electrode has a different meaning. The picture below shows a battery with four electrodes.
Mobile phone batteries are detachable. You can also buy a few extra batteries for spares yourself.
A careful friend may find that there are three or four exposed electrodes on the phone battery, which are used to contact the phone at this time. Each electrode has a different meaning.
The picture below shows a battery with four electrodes.
The following describes the meaning of each battery electrode.
Generally speaking, there are three or four electrodes in a battery. Two of the electrodes are the positive and negative poles of the battery, and the positive and negative poles of the battery are connected to the main board of the mobile phone to supply power to the main board. When charging, the battery is also charged through the positive and negative poles.
The third interface realizes the temperature detection function. The battery is very sensitive to temperature, and it may cause the temperature of the battery to rise sharply when playing the mobile phone for a long time and charging. If the temperature is too high, if it is not controlled in time, it may cause the battery to catch fire and explode. , So it is necessary to detect the temperature of the battery in real time.
The battery manufacturer integrates an NTC thermistor into the battery, and the mobile phone can detect the temperature of the battery in real time through AD sampling, thereby realizing the safety of the battery.
In addition to the above three interfaces, some batteries also have a fourth interface, which is used to implement online battery detection.
Some mobile phone manufacturers require battery capacity testing and online testing. If you replace the non-original battery, it will not work properly and you can only buy the original battery.
A resistance or other solution is added to the battery. After the battery is connected, the mobile phone will detect the state of the battery. If the match is successful, it will work normally, otherwise the mobile phone will not work normally.
The above is the meaning of the battery interface.