1. Over-discharge protection: When the battery is almost exhausted and the voltage reaches a minimum required value, the protection panel will also be closed and it will no longer be discharged. The product will turn off automatically. , forming protection against excessive discharge.
2. Overcharge protection: When charging the product, when the voltage reaches the maximum battery voltage (4.2V), the protection board will automatically turn off and turn off, indicating that it is fully charged and does not will no longer continue to charge. A form of overload protection.
3. Short circuit protection: When the battery is accidentally short circuited, the protection board will automatically close within a few milliseconds and will not be turned on at that time, everything will be fine even if the. the positive and negative electrodes touch each other, forming a kind of protection against short-circuits which will not cause explosions.
4. Overcurrent Protection: When the battery is discharged, the protection board will have a maximum current limit. Different products are different. When the discharge exceeds this current, the protection panel will automatically close.
Detailed information
1. Main functions: overcharge protection function, overdischarge protection function, short circuit protection function, overcurrent protection function, overheating protection function, balanced protection function.
2. Interface definition: The charging port and discharge port of the board are independent of each other. They share the positive electrode B- is the negative electrode connected to the battery, C- is the negative. the charging port electrode; P- is the discharge port. Negative electrodes ; pads B-, P- and C are all through-hole type, and the diameter of the pad holes is 3mm; output in the form of a DC pin socket.
Baidu Encyclopedia - Lithium Battery Protection Board
Under normal circumstances, the life of lithium polymer batteries can reach more than 500 times.
Lithium-ion polymer batteries have the following characteristics:
① Shaping flexibility
② Higher mass specific energy (3 times that of the MH-Ni battery); ;
③Wide electrochemical stability window, up to 5V;
④Perfect safety and reliability;
⑤Longer life, capacity Less loss;
>⑥Using high volumes;
Detailed information:
Precautions for using lithium polymer batteries:
Be careful of short circuit conditions< /p>
Lithium-ion polymer batteries are subject tox short circuits during the charging process. Including: internal short circuit, external short circuit, etc.
Although most lithium-ion batteries now have short circuit protection circuits and explosion-proof wires, in many cases this protection circuit may not work under various circumstances. Explosion-proof wires. The role he can play is. also very limited.
Do not overcharge during the second charge
If the lithium-ion polymer battery is charged for too long, the possibility of expansion will increase.
The chemical properties of lithium are very active and easy to burn. As the battery is charged and discharged, the temperature inside the battery continues to rise. The gas generated during the activation process expands and internal pressure. battery increases. The pressure reaches to a certain extent, if the outer shell is damaged, it will breakwill be, causing a leak, fire or even explosion. And lithium-ion polymer batteries are only getting bigger.
Everyone should pay attention to safety when using it.
Reference materials:
Lithium-ion polymer battery Baidu Encyclopedia