Answer: Lithium iron batteries and lead-acid batteries differ in their chemical properties and working principles, which result in different requirements for series and parallel connections.
Firstly, lithium iron batteries use lithium ions as the charge transfer medium, while lead-acid batteries use the chemical reaction of lead and sulfuric acid for charge transfer. Lithium-ion batteries are known for their high voltage stability, fast charge transfer rate, and high energy density, but they also have higher safety requirements.
When connecting and combining lithium iron batteries, it is crucial to maintain voltage and capacity matching between the batteries. If there are differences between the batteries, it can lead to imbalanced currents between them, which can cause safety issues such as overcharging, over-discharging, and thermal runaway. This is because in series connection, batteries with voltage mismatch may be driven by the voltage of other batteries, leading to overcharging and risking battery damage or even explosion. In a parallel connection, batteries with capacity mismatch can result in uneven current distribution, with some batteries bearing excessive load, causing over-discharging and damage.
In comparison, lead-acid batteries have smaller voltage and capacity fluctuations, and they have relatively higher internal resistance, which allows them to tolerate some differences during series and parallel connections. However, lithium batteries exhibit larger voltage and capacity fluctuations and lower internal resistance, requiring stricter guidelines for series and parallel connections.
Therefore, to ensure the safety and stable performance of lithium iron batteries, series, and parallel connections must be carried out according to strict regulations to ensure voltage and capacity matching between the batteries, and to avoid imbalanced current distribution, thereby minimizing safety risks.

Any more questions please feel free to contact: info@szmaxpower.com