A lithium iron phosphate battery is a type of lithium-ion battery that uses lithium iron phosphate (LiFepO4) as the positive electrode material and carbon as the negative electrode material. The rated voltage of a single cell is 3.2V, and the charging cut-off voltage is 3.6V~3.65V.
During charging, some lithium ions in lithium iron phosphate batteries are released and transferred to the negative electrode via the electrolyte, where they embed into the carbon material. Simultaneously, electrons are released from the positive electrode and travel from the external circuit to the negative electrode, maintaining the chemical reaction balance. During discharging, lithium ions are released from the negative electrode and travel to the positive electrode via the electrolyte. At the same time, electrons are released from the negative electrode and travel from the external circuit to the positive electrode, supplying energy to the external environment. Lithium iron phosphate batteries have advantages such as high operating voltage, high energy density, long cycle life, good safety performance, low self-discharge rate, and no memory effect.
With the surge in energy storage demand for 5G base stations, the comeback of lithium iron phosphate batteries seems to be gradually beginning. A BMS (Battery Management System) can transform a group of "dumb" cells into a smart lithium-ion battery pack, leading to a "skyrocketing" demand for lithium iron phosphate batteries in base stations.
The lithium iron phosphate battery BMS management system is highly compatible with the development of 5G base stations.
The Battery Management System (BMS) for lithium iron phosphate (LFP) batteries can be divided into two main sections: battery monitoring and battery control. The monitoring section includes voltage and temperature measurement as well as battery charge balancing. These are the fundamental attributes of a lithium-ion battery management system. The safety management mode of the battery management system is crucial for battery safety. A typical LFP battery management system includes a data acquisition unit, a calculation and control unit, a balancing unit, a control execution unit, and a communication unit.
The BMS (Battery Management System) of lithium iron phosphate batteries can monitor the entire battery system and monitor the performance of each battery in the backup power supply. Users can easily monitor the remaining power of each battery and the operation of the device with their fingers. This aligns perfectly with the development of smart 5G base stations.
The manufacturing process of lithium iron phosphate (LFP) batteries is relatively complex, and the consistency variation of individual cells is greater than that of valve-regulated lead-acid (VRA) batteries. This causes the voltage of individual cells in the battery pack to rise rapidly in the later stages of charging, and since communication base stations are often unattended, this rise is difficult to detect in time. This leads to a shortened lifespan or damage to the LFP-phosphate battery pack. To prevent this, a battery management system must be used to ensure the safety and reliability of the batteries.
Lithium iron phosphate (LFP) batteries can meet the requirements of 5G base stations. Due to their small size, light weight, excellent high-temperature performance, excellent cycle performance, high-rate charge and discharge, and environmental friendliness, LFP battery systems are more suitable for harsh base station environments, such as high ambient temperatures, small room size, and low load-bearing capacity, ensuring the safe operation of 5G base stations.
The lithium iron phosphate (LFP) battery management system employs advanced self-diagnostic and fault-tolerant technologies, and features self-checking capabilities for both the module's software and hardware. Even internal faults or equipment damage will not affect the safety of battery operation. The BMS has corresponding digital communication interfaces and open communication protocols, as well as necessary input and output terminals. It can be flexibly connected to a power storage system (PSS), energy storage power station monitoring and dispatching systems, etc., to achieve coordinated control, improve the efficiency of energy storage power stations, and optimize load control and dispatching decisions.
Lithium iron phosphate (LFP) batteries are a new type of environmentally friendly backup power source for energy storage and backup power. This system uses environmentally friendly LFP batteries, is equipped with a high-performance battery management system (BMS) for effective battery management, and has a wider range of performance and application advantages compared to traditional batteries. The country's emphasis on 5G base stations has also brought more development opportunities to LFP batteries. The bidding for mobile devices in my country is just the beginning of 5G communication this year. It is expected that as the pandemic improves, the energy storage market will further develop, and the LFP battery industry will have greater room for growth by 2020.
The company has added R&D to lithium iron phosphate (LFP) batteries, invested in and expanded production, and a new round of market competition has gradually begun. In future new 5G base station projects, we will continue to encourage the use of LFP batteries as backup power batteries for base stations and promote their large-scale application in base stations.
