What is the balanced working principle of lithium ion battery protection plate?

Lithium-ion battery protection plate is the charge and discharge protection of series-connected lithium-ion batteries; When fully charged, the voltage difference between the single cells can be guaranteed to be less than the set value, so that the single cells of the lithium-ion battery pack can be uniformly charged, and the charging effect under the series charging mode is effectively improved; At the same time, the overvoltage, undervoltage, overcurrent, short circuit and overtemperature state of each single battery in the battery pack are detected to protect and prolong the service life of the battery; Under-voltage protection can prevent each battery from being damaged due to over-discharge when it is discharged.

Equalization principle of Li-ion battery protection plate The commonly used equalization charging technologies include constant shunt resistance equalization charging, on-off shunt resistance equalization charging, average battery voltage equalization charging, switched capacitor equalization charging, buck converter equalization charging, inductance equalization charging and so on.

When charging lithium-ion batteries in series, each battery should be charged evenly, otherwise the performance and life of the whole lithium-ion battery will be affected during use. However, the existing single lithium-ion battery protection chip does not contain the balanced charging control function, and the balanced charging control function of multiple lithium-ion battery protection chips needs to be externally connected to CPU; Through serial communication with the protection chip, the complexity and design difficulty of the protection circuit are increased, the efficiency and reliability of the system are reduced, and the power consumption is increased.

Equalization principle of lithium-ion battery protection board According to the needs of application, after changing the model and series number of protection chips and the power levels of switching devices and energy-consuming components in the circuit, power lithium-ion batteries with any structure and voltage level can be protected and evenly charged.