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Active Equalization Battery Management System (BMS)
In today's increasingly developed Battery technology, Battery Management System (BMS) has become an important component to ensure battery performance, safety and service life. With the popularity of electric vehicles, renewable energy storage systems and other applications, the balanced management of battery packs is particularly important. As an advanced battery Balancing technology, Active Balancing BMS (Active Balancing BMS) offers higher energy efficiency, faster balancing speed, and better battery performance than passive balancing systems. This paper will introduce the working principle, advantages and disadvantages, application scenarios and future development trend of active balanced BMS in detail.
What is passive equilibrium BMS?
Active Balance BMS is a management system that achieves battery balance by actively allocating the flow of electrical energy between battery cells. Unlike passive equalization systems that achieve equalization by consuming excess power, active equalization systems reduce energy loss and improve overall energy utilization efficiency by transferring excess power from one cell to another that needs to be charged.
the working principle
Condition monitoring
The system monitors the voltage, temperature, and state of charge (SOC) of each cell in real time, collecting data to assess the overall health of the battery pack.
Battery balance determination
When the system detects a large voltage difference between battery cells, the system starts the equalization mode. At this point, those cells that are overcharged and those that need to be charged are identified.
Energy transfer
Using efficient energy transfer devices (such as DC-DC converters), active equalization systems can electrically transfer the power of excess battery cells to cells with lower power, thus achieving rapid equalization. This process can take place during the charging and discharging phases.
Cycle monitoring and adjustment
The system constantly monitors the status of the battery unit and adjusts the balancing strategy as needed to ensure that each unit is always in the optimal charging state.
Advantages of active balanced BMS
Active balanced BMS offers several significant advantages:
High energy efficiency:
By efficiently distributing and transferring electricity, energy loss is reduced and the overall energy utilization of the battery pack is improved.
Fast balancing:
The active balancing system can quickly respond to the power difference between the battery cells and quickly adjust, thereby avoiding the phenomenon of overcharging or overdischarging the battery cells.
Extended battery life:
By ensuring that the battery unit operates in a similar charging state, the battery life can be significantly extended and maintenance costs reduced.
Temperature Management:
Active equalization can reduce the overheating caused by battery imbalance and improve the safety of the system.
Strong adaptability:
Suitable for large and small scale battery systems, providing flexible solutions for different battery pack needs.
Disadvantages of active balanced BMS
Although actively balanced BMS has many advantages in performance and efficiency, there are also some disadvantages:
Higher cost:
The complex hardware and software design of actively balanced BMS systems leads to relatively high manufacturing costs, which may increase the investment in the overall battery system.
Complexity:
The design and implementation of active balancing system requires a high technical threshold, which increases the complexity of development and maintenance.
High requirements for batteries:
Most active equalization solutions require a high-performance battery cell and may not be compatible with all types of batteries.
Potential failure risks:
Conversion equipment in various energy conversion processes may introduce new failure modes, and effective protection measures are required to reduce the risk.
Application Scenarios
Electric vehicles
In electric vehicles, actively equalizing BMS improves the overall performance of the battery pack, extends the range, and improves battery life.
Renewable energy systems
In wind and solar energy storage systems, actively equalizing BMS helps optimize the charge and discharge efficiency of the battery pack, ensuring stable energy output.
Large-scale energy storage system
For large energy storage systems that require efficient management and coordination of multiple battery cells, such as power scheduling and delayed demand response, active balanced BMS is ideal.
High Performance portable devices
In portable devices that require high performance and long battery life, active balancing provides a more optimized battery management solution.
CONCLUSION
With its advantages of high efficiency, intelligence and reliability, active balanced battery management system has become an indispensable technical solution for modern battery management. Although there are some cost and complexity issues, with the progress of technology and the growth of market demand, active balanced BMS will continue to expand applications in the fields of electric vehicles, renewable energy and energy storage systems, helping to promote the future development of green energy.
Home energy storage product series
A lithium battery pack for home energy storage systems, which is compatible with solar panels and the sun The inverter can work together with the power grid to power household appliances, and it can also be used as a For off grid systems.
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