Connecting batteries in parallel can achieve voltage equalization to some extent, but the equalization effect depends on the battery itself and the design of the equalizer.
I. Basic Concepts of Battery Parallel Connection
Battery parallel connection utilizes the simultaneous discharge of multiple batteries to increase the total voltage and total capacity. For example, connecting two identical batteries in parallel doubles the total voltage and capacity of a single battery. Therefore, in applications requiring high capacity and high voltage, parallel connection of batteries is commonly used to provide power.
II. Voltage Equalization Issues in Parallel Battery Connections
While parallel connection of batteries can increase voltage and capacity, it can lead to voltage imbalances between different batteries. This is because even batteries of the same type, manufacturer, and specifications can have slight differences, resulting in variations in their internal electrochemical reactions and consequently, voltage variations. When multiple batteries are connected in parallel, these slight differences cause voltage imbalances, which in turn can lead to shortened battery life and energy waste. Therefore, measures need to be taken to address this issue when connecting batteries in parallel.
