DALY LFP 11S 40A 3.6V BMS Hardware Lithium Battery

The DALY LFP 11S 40A 3.6V BMS is a Battery Management System (BMS) designed to manage and protect 11-series lithium iron phosphate (LiFePO4) battery packs. This system is tailored for applications requiring moderate to high power output, offering essential safety features and protection while supporting a continuous discharge current of 40A. Below is a detailed description of the hardware, features, and specifications of the DALY LFP 11S 40A 3.6V BMS:

Key Features and Specifications:

1. Battery Configuration:
   • 11S Configuration: The BMS is designed for an 11-series LiFePO4 battery pack, meaning it manages 11 individual cells connected in series.
   • Nominal Voltage: With each LiFePO4 cell having a nominal voltage of 3.6V, the total nominal voltage of the pack is 39.6V (3.6V × 11 cells).
   • Full Charge Voltage: Each cell can be charged up to 3.65V, resulting in a total maximum voltage of 40.15V for the entire pack.
   • Cut-off Voltage: The BMS disconnects the pack when the voltage of any individual cell falls below a preset threshold, typically around 2.5V to 3.0V per cell, which results in a cut-off voltage range of 27.5V to 30V for the full pack.
2. Current Rating:
   • 40A Continuous Discharge Current: The BMS is rated to handle a continuous discharge current of up to 40A, making it suitable for applications requiring higher power output compared to lower current models (such as 20A versions). It can support moderate power needs in various electric mobility, energy storage, and high-power electronics applications.
   • Peak Current: The BMS can typically handle surge or peak currents (often double the continuous rating for short periods), depending on the specific model, to handle sudden high-power demands without damage.
3. Protection Features: The DALY LFP 11S 40A BMS is equipped with several protection mechanisms to ensure safe and reliable operation of the battery pack:
   • Overcharge Protection: Prevents overcharging by disconnecting the charging circuit if any cell voltage exceeds the maximum limit, typically 3.65V per cell.
   • Overdischarge Protection: Disconnects the battery pack if the voltage of any cell drops below a safe level (usually 2.5V to 2.8V per cell), preventing deep discharge that could damage the cells.
   • Overcurrent Protection: Protects against excessive current draw by disconnecting the load if the current exceeds the 40A continuous rating, preventing overheating or other damage.
   • Short-Circuit Protection: In the event of a short circuit, the BMS will disconnect the battery to prevent excessive current flow and potential damage to the pack.
   • Temperature Protection: Monitors the temperature of the cells, disconnecting the system if the temperature exceeds safe operating limits (typically 60°C to 75°C) to prevent thermal damage or thermal runaway.
4. Cell Balancing:
   • Active Cell Balancing: The BMS ensures that all cells in the 11S pack are balanced, meaning they are kept at the same voltage level during charging. This helps prevent overcharging or overdischarging of individual cells, which can reduce battery performance and lifespan.
   • Balancing Current: The BMS typically provides cell balancing currents of around 50mA to 100mA per cell to maintain equal voltage levels across the pack.
5. Communication and Monitoring:
   • CAN Bus or UART Communication: Some versions of this BMS include CAN Bus or UART communication protocols, allowing for easy integration with external devices or controllers. This allows for:
     • Real-time monitoring of battery health, including voltage, current, and temperature.
     • State of Charge (SOC) tracking, providing users with data on the remaining charge in the battery pack.
     • Voltage and Current Readouts: Offers precise data on the voltage of each cell and the overall pack, as well as the discharge current.
     • Temperature Monitoring: Helps ensure the battery remains within a safe operating temperature range.
   • Data Logging: Some models allow for the collection and analysis of operational data such as charge cycles, current draw, and battery performance for maintenance and troubleshooting.
6. Hardware Features:
   • MOSFET Transistors: The BMS utilizes high-quality MOSFETs for efficient power management, ensuring smooth current handling with low losses and minimal heat generation.
   • Heat Management: The BMS features an optimized PCB design that includes heat dissipation pathways such as thermal vias to prevent overheating during high-current operations.
   • Connector Pins: The BMS is equipped with secure connector pins for interfacing with the battery pack and for seamless integration into a system, ensuring reliable connections during operation.
   • Durability and Robustness: The BMS features a high-quality PCB and other durable components that ensure longevity and stable operation in various conditions.
7. Applications: The DALY LFP 11S 40A BMS is well-suited for various high-power applications:
   • Electric Vehicles (EVs): It is ideal for electric bikes, electric scooters, and small electric cars that require up to 40A of continuous discharge current.
   • Energy Storage Systems (ESS): Suitable for solar energy storage, backup power systems, and off-grid energy solutions where moderate to high current output is necessary.
   • Portable Power Stations: Used in portable energy storage devices for outdoor, emergency, or off-grid power applications.
   • Power Tools: The BMS can also be used in battery-powered power tools and high-power equipment that require reliable battery management.
   • Marine and RV Applications: Perfect for marine applications (e.g., electric boats) and RV battery systems requiring high efficiency and safety.

Summary:

The DALY LFP 11S 40A 3.6V BMS is a high-performance Battery Management System for 11-series LiFePO4 battery packs. It supports a continuous discharge current of 40A, providing essential protections including overcharge, overdischarge, overcurrent, short-circuit, and temperature protection. The BMS features active cell balancing and communication interfaces (such as CAN Bus or UART) for real-time monitoring and integration into larger systems. Ideal for applications in electric vehicles, energy storage systems, and high-power tools, the DALY LFP 11S 40A BMS ensures reliable, safe, and efficient performance of the battery pack over its lifetime.