Why does a mobile phone battery have three electrodes? 5

Nowadays, the common lithium-ion batteries for mobile phones have a set of temperature detection circuits inside, and some batteries also have pressure and model parameter circuits, so that in addition to the two poles (positive and negative) poles for charging and discharging, there will be one to three more electrodes. These electrodes provide information such as battery temperature, pressure, and model number to the internal circuit of the mobile phone for use by the mobile phone to ensure that the charging is intact and safe to use.

The mobile phone battery is an energy storage tool that provides power for the mobile phone, and the mobile phone battery generally uses lithium batteries and nickel-metal hydride batteries.

"mah" is the unit of battery capacity, and the Chinese name is milliampere-hours.

In layman's terms, these three electrodes are only used in maintenance, there are instruments, touch the electrodes, and the content of each electrode is different, so as to judge what is wrong, and the size of the index is only understood by professionals.

Some batteries are used for detection and protection, but some mobile phones only use 2 electrodes.

In addition to the positive and negative poles, the white line in the middle.

Some of the functions of the contact are to record battery information and protect the battery.

The red line is the positive pole, the black line is the negative pole, and the other color lines are the middle pole of the battery, and these three wires are connected to the main board of the product. The middle pole is the main board of the product to monitor the voltage of the lithium battery.

When two batteries are used in series, the intermediate connection is used for voltage balancing. That is, when the terminal voltages of the two batteries are inconsistent, it is necessary to adjust the charge and discharge of the batteries through a special balance circuit to make their terminal voltages consistent and ensure the overall battery characteristics after series connection.

The power is measured, and the phone does not show the power after blocking it, but it is used normally, you can try.

Mobile phone batteries generally have three or four electrodes, two of which are well understood, which are positive and negative.

The other one or two does. It is used to detect the change of battery capacity, when the battery is full of mobile phones, the charging circuit will be automatically cut off to avoid overcharging the battery, and when the battery is empty, it will automatically prompt the battery to be low and make the software automatically shut down. To put it simply, it is a safety to monitor the discharge of battery charges.

It is used to detect the temperature of the mobile phone battery.

Generally, lithium batteries have three terminals: + - T or + - C, and more high-end lithium batteries such as cameras also have four terminals: + - T d or + - C D

- I won't talk about it, t:temperature is the abbreviation of the mobile phone, which is used by the mobile phone to detect the temperature of the battery, when the mobile phone detects that the battery temperature is higher than a certain set value, it will judge that the battery is in an abnormal state, and will automatically cut off the power supply of the mobile phone. c:

The abbreviation of control is related to the design of mobile phones or other electrical appliances such as cameras, mainly for control, and the specific functions of each manufacturer can be defined by themselves. d: The abbreviation of data, the data transmission port, such as the transmission of encrypted digital dramas, can only match the product used by using the original battery, otherwise, it cannot be turned on, etc.

Because the three terminals of T CD only play a specific function when used with the corresponding product, there is no necessary connection with charging, so only the +- terminal is connected when charging.

This is the special feature of mobile phone batteries, general mobile phone batteries, whether it is authentic original mobile phone batteries, or commercial batteries of well-known brands such as our domestic Hongyi batteries, all have three metal contacts, in addition to the positive and negative electrodes. The one in the middle, the white line contact mentioned above, has some functions to record battery information and protect the battery. Hope it helps.

The red wire is positive, the black wire is negative, and the white wire is connected to the positive pole through a resistor, which is used for detection.

Red line positive, black line negative, white line detection.

The other is to provide a signal to the mobile phone detection circuit. Avoid damage caused by over-discharge of the battery, and automatically shut down and cut off the power supply.

Pin, also known as pin, is called PIN in English. It is the wiring of the internal circuit of the integrated circuit (chip) and the peripheral circuit, and all the pins constitute the interface of the chip. A section at the end of the lead wire that is soldered together with the pads on the PCB to form a solder joint.

The pins can be divided into heel (bottom), toe (toe), side (side) and other parts.

This pole is the output of the temperature sensing voltage, which is used to monitor the internal temperature of the cell at any time.

1. Expansion: 1) Function: It is easy to cause the battery temperature to be too high when charging, at this time the charging will automatically be cut off, which is to rely on this pole, when the mobile phone is working, when the mobile phone detects this voltage, it will automatically shut down immediately to protect the mobile phone and the battery. This pole is useful.

2) Distribution: Usually put the mobile phone battery electrodes facing upwards and facing you, the left is positive, the right is negative, and the middle is the temperature electrode.

The special nature of mobile phone batteries lies in this, the current mobile phone batteries, whether they are authentic original mobile phone batteries, or our domestic Hongyi batteries and other well-known brands of commercial batteries, have three metal contacts, and some mobile phone batteries also have four metal contacts, in addition to the positive and negative poles, other contacts are used to protect the mobile phone battery circuit, and also have the role of recording mobile phone battery information, I hope to help you.

Most mobile phone batteries have three contacts, one is the positive pole, one is the negative pole, and one is the data interface.

The data interface is usually used to transmit information such as the temperature of the battery, the number of charges, etc., and some also rely on this electrode to transmit information about whether the battery is genuine.

The positive electrode is used to provide power to the mobile phone, and at the same time provides the battery voltage signal to the fuel detection circuit in the machine, and transmits electric energy to the battery during charging.

The left and right points of the three poles are the positive and negative poles of the power supply, which can be measured with a multimeter to determine which is the positive and which negative, and the middle is the signal pole (such as temperature, battery model, charging signal, etc.).