Battery cabinet self-balancing system principle

What is battery balancing?

Battery balancing, or so-called battery equalization, is considered as one of the most effective methods to reduce the inconsistent effect on the battery string [ 11, 12]. For the configuration of the battery balancing, it is classified as the passive balancing method (PBM) and the active balancing method.

How do you maintain a battery balancing system?

Avoid excessive speed or degree of balancing that could damage the individual battery units or cause performance declines. Continuously monitor changes in parameters such as voltage, current, and temperature during the balancing process to ensure safety and effectiveness.

How to combine battery balancing techniques into a BMS?

A deep knowledge of both the chosen balancing approach and the overall system structure of the BMS is needed for combining battery balancing techniques into a BMS. It consists of accurate control strategies, careful design, strong safety mechanisms, and complete diagnostics and maintenance methods.

What are the different types of battery balancing?

For the configuration of the battery balancing, it is classified as the passive balancing method (PBM) and the active balancing method. The PBM usually dissipates the energy through the paralleling resistors. In contrast, the active balancing method utilizes one part of the battery string to charge another.

What is active battery balancing?

An advanced method of managing an equal SOC across the battery pack’s cell is known as active battery balancing. Instead of dissipating the excess energy, the active balancing redistributes it, resulting in an increased efficiency and performance at the expense of elevated complexity and cost.

What is a model based balancing system?

The battery string consists of n battery cells connected in series. A MOSFET is connected in parallel to each battery cell to realize the balancing function. The model based balancing control module measures the current of the battery string and voltages of all the battery cells. Fig. 1. The schematics of the model based balancing system.