Large energy storage battery balancing circuit

How a battery balancing circuit works?

In this balancing circuit, a series LC (resonant tank) is used as an energy carrier connected with the bus connection. All battery cells (n number) and MOSFET switches are connected in the bus (Fig. 1). The resonant tank stores the excess energy from the strong cell and releases this energy to the weak cell to the battery cell string.

How LC energy balancing circuit works?

The series of energy storage devices, namely battery, super/ultra-capacitor string voltage balancing circuit, based on a single LC energy converter, is presented in this paper. It transfers the excess energy directly from the higher cell to the lower cell in the string.

What are the different types of battery charge balancing?

There are two types of battery charge balancing methods. In the passive charge balancing system, the strong cell's excessive energy is diminished by a resistor, Zener diode, or transistor and equal to the lower voltage cell.

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.

What are the different types of battery balancing methods?

These methods can be broadly categorized into four types: passive cell balancing, active cell balancing using capacitors, Lossless Balancing, and Redox Shuttle. Each Cell Balancing Technique approaches cell voltage and state of charge (SOC) equalization differently. Dig into the types of Battery balancing methods and learn their comparison!

What is active balancing circuit?

It transfers the excess energy directly from the higher cell to the lower cell in the string. This requires n-4 bidirectional MOSFET switches and a single LC tank for n number of energy storage device strings. This active balancing circuit has high efficiency, fast balancing speed, small size, low cost, and maximum energy recovery.