What is the BMS of lifepo4 battery pack?
We often see the words of “with intelligent BMS” in lithium iron phosphate battery packs description. What is the “BMS”? What role does it play in the lithium iron phosphate battery pack? Next, let us discuss the BMS of the lithium iron phosphate battery pack.
What is BMS?
BMS is a set of electronics that monitors and manages the performance of all the batteries. The battery management system (BMS) of a lithium iron phosphate battery pack typically includes functions such as calculating the remaining battery power, monitoring battery temperature, and detecting battery safety and health status. It plays a crucial role in preventing or avoiding abnormal conditions such as over-charge, over-discharge, over-temperature, overcurrent, and short circuit. Due to its integral role in ensuring the safe and efficient operation of the battery pack, the BMS is often referred to as the “brain” of the battery pack.
What are the main functions of BMS?
The main functions of BMS generally involve monitoring battery status, alarm and protection, balance management, communication and positioning, etc.
Monitoring battery status function
BMS includes the measurement and calculation of some indicator parameters, including battery voltage, current, temperature, power, SOC (state of charge), SOH (state of health), SOP (state of power), and SOE (state of energy). With this data, the battery state can be monitored in real-time, enabling more convenient battery management.
Alarm and protection function
When an abnormality occurs, the BMS will issue an alarm and take protective measures to shut down the battery, and send the alarm information to the monitoring platform. The main alarms generally involve the following:
Overcharge: cell and total voltage are overvoltage, charging overcurrent;
Over-discharge: cell and total voltage are under voltage, discharge overcurrent;
Temperature: high cell temperature, high ambient temperature, low cell temperature, low ambient temperature.
Status: upside down, collision, water immersion status etc.
Balancing management function
Just as there are no two identical leaves in the world, no two battery cells are exactly the same.
From a production point of view, although the material type and process of producing battery cells are the same, there will still be subtle differences in the produced battery cells from the perspective of subtle structure. The chemical reactions occurring within battery cells during the charging and discharging process can never be entirely consistent. Because of this, the cells will still have differences within a certain range in terms of voltage difference, internal resistance, etc. Therefore, the battery pack composed of cells needs to be balanced to maintain Maximum performance of the battery.
Communication and positioning function
The BMS has a separate communication module, which is mainly used for data transmission and battery positioning, allowing the monitoring platform to monitor the battery state in real-time.
To sum up, the lifepo4 battery pack is equipped with a battery management system (BMS) that enables real-time monitoring and management of the battery’s status. This system ensures optimal battery life, efficiency, and safety. As a manufacturer of lithium iron phosphate battery packs, PLB has equipped each of its battery pack products with a BMS that not only maximizes battery performance, but also allows battery users to use it with satisfaction and comfort!