Lithium batteries often feature three terminals instead of the standard two, with the additional terminal serving critical functions such as temperature monitoring and improved safety.
These three wires are connected to the main board of your product, and the middle pole is Give your product motherboard to monitor the voltage of the lithium battery.
How do you know if a lithium battery is protected?
A 4s lithium battery has 0, 3.7, 7.4, 11.1, 14.8, and 5 different potentials. If it is a protected version, the two red and black wires should be internally shorted. The white wire is the flag of the protection chip. It is a high battery voltage when it is protected and a low voltage when it is not.
What is the 3rd pin on a battery?
The third pin is usually found on Li-Poly, or Lithium Polymer batteries and is required in order to charge the battery safely. Because these batteries are usually multi-cell, the third pin is used for balancing the charge between each of the cells.
What is inside a Li+ battery pack?
In mobile phones, some Li+ battery packs have 3 terminals. Two possibilities: positive, negative, 1-wire bus. The latter is a digital communication bus that's connected to a gas gauge IC inside the pack. If you want to explore what's inside single-cell Li+ battery packs, look-up bq27000 gas gauge IC and associated application notes.
What if my battery does not have a protective plate?
1) If your battery does not have a protective plate, the three wires are: the red wire is the positive pole, the black wire is the negative pole, and the other color wires are the middle pole of the battery.
What is a lithium battery smart battery?
The lithium Battery Smart batteries have internal cell balancing and an external battery management system (BMS). With cell balancing and internal or external battery management system (BMS). Each battery has the ability to communicate with each other, but they can also communicate with a monitoring device. In Victron's case, this is a GX device.