In order to achieve a better balance of equalization, try to use a 25.6V switching source to charge (self-stop current is less than 30mA) because the equalization current of the equalization IC is around 45mA. Most of the 25.2V lithium battery chargers on the market will stop when the charge detection is less than 100mA. If there is no balance, there will be no charge, which will cause the battery voltage of each group to be unbalanced. There is a problem with the voltage drop between the battery voltage and the output voltage. The working principle of this type of protection board is the negative pole protection. Some combination will have a voltage drop of 0.1-0.3V, and charging and discharging several times will reduce the voltage drop. It is normal. The charger should try not to use the 25V power supply. The 6-string lithium battery is fully charged at 25.2V, and the 25V power supply will be full. The protective board is also not protected, and it is always charged, and long-term use has an impact on the life of the battery.
The power range described applies to the following products:
Massager battery pack, LED light backup power supply, 12V electronic products, solar street light battery pack, monitoring standby power supply, and other products
T point description:
adding a normally closed temperature sensor switch can extend the temperature protection function, and the switch should remove the 0R resistor next to the solder joint.