• The nominal voltage of LiFePO4 batteries is usually 3.2V, for example, 4 3.2V batteries connected in series can get a 12.8V battery pack, so series connection is essential for applications that require higher voltages. Contact online >>
• The nominal voltage of LiFePO4 batteries is usually 3.2V, for example, 4 3.2V batteries connected in series can get a 12.8V battery pack, so series connection is essential for applications that require higher voltages.
• Higher voltage output：Connecting multiple batteries in series increases the total voltage of the battery pack, making it suitable for high voltage applications, such as connecting four 12V batteries in series to obtain a voltage of 48V.
• More efficient energy storage：Battery packs in series share the load equally, ensuring that the batteries charge and discharge at the same rate.As a result, there is a higher efficiency in overall energy storage.
• Overcharge Risk: Different battery cells in a series battery pack may discharge at different rates, resulting in an unbalanced voltage in the battery pack. The battery pack can be shorted in life if some battery cells are overcharged.
Battery capacities and ages must be similar in a series battery pack in order to avoid these problems. Furthermore, properly charging the battery pack and monitoring its voltage are essential for preventing overcharging and ensuring its efficiency.
In a series connection, it is critical to ensure that all cells have similar characteristics, including capacity and internal resistance. If there is a severe imbalance between cells, one or more cells may be overcharged or over-discharged, resulting in performance degradation and potential damage.
LiFePO4 series batteries require careful management of the charging and discharging processes. It can be detrimental to the overall performance and life of a battery system if differences in charge or discharge rates between cells are not properly controlled.
It is possible to solve the problem of unbalanced cells in series by implementing a balanced charging system. By balancing the charge to each cell, the cells are prevented from being overcharged or overdischarged. Balancing can be achieved through active circuits or passive methods, such as resistance-based methods.
For series LiFePO4 batteries, BMS are highly recommended. Each cell is monitored and controlled by the BMS to ensure that it operates within a safe range during charging and discharging. This prolongs the battery’s life and optimizes its performance by preventing overcharging, overdischarging, and extreme temperatures.
Balanced charging and a BMS can effectively mitigate problems with series connections in LiFePO4 battery systems. As a result, the battery system will perform optimally, have a longer life, and be safe.
• For example, 2 100ah batteries connected in parallel can get a 200ah battery pack. Parallel connection should be adopted when more energy storage or longer discharge time without increasing voltage is required.
• Increased capacity: When multiple batteries are connected in parallel, the overall capacity of the battery pack increases, making it suitable for high-power applications. If four 12.8V 100AH batteries are connected in parallel, the voltage remains the same, but the capacity increases to 400Ah.
About Lifepo4 series
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