Balancing lithium-ion batteries during discharge takes a longer time. Due to the relationship between discharge speed and load resistance value, the efficiency of balancing during system operation is low. If equalization is carried out during discharge and a shorter equalization time is desired, an external power transistor with a smaller conduction resistance should be connected, which is very common, such as MOSFET or FET.

If you want to quickly balance during discharge, you must connect a low resistance resistor in series with a power transistor to reduce the power consumption of the power transistor. Without this current limiting resistor, the transistor would quickly consume the power of the lithium-ion battery.

Measuring the voltage of lithium-ion batteries during charging is not accurate and can cause premature equalization of lithium-ion batteries. Therefore, it is necessary to periodically stop charging in order to measure battery voltage. During charging, balancing requires an external power transistor with low conduction resistance to achieve battery balancing, which will overcome the same limitations as balancing during current discharge.

The design of balance management process is crucial in any lithium-ion battery system. Nowadays, balance management is indispensable for both electric forklift lithium-ion battery systems and lithium-ion battery systems used in new energy vehicles. In the internal balance management of battery packaging, whether it is traditional lead-acid batteries or popular lithium-ion batteries, the performance is not just about the performance of individual cells, It depends more on the balanced management performance of the overall lithium-ion battery pack.