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Battery pack management system
A single Battery Management System (usually called a single battery management system) and a battery management system (BMS) have many similarities, but their scope of action and management content are different.
Battery pack management system
Battery pack management system (battery pack BMS) not only includes the function of individual battery management, but also needs to consider the collaborative work between multiple battery cells, including the balanced management of the battery pack, the overall health status assessment of the battery pack, the integrated charge and discharge management, and the security protection at the battery pack level. The complexity and coordination of the battery pack management system is higher than that of the single battery management system, which is suitable for larger application scenarios, such as electric vehicles and large energy storage systems.
The difference between them
Scope of monitoring
Single BMS: only monitors the voltage, current, temperature and other basic parameters of a single battery cell.
Battery pack BMS: monitors the entire battery pack, including the status of multiple individual batteries, overall voltage, current, temperature and health.
Functional Complexity
Single BMS: focuses on the basic safety protection of single battery, such as overcharge, overdischarge, and overtemperature.
Battery pack BMS: In addition to the protection of individual batteries, it is also responsible for the balanced management of the battery pack, the overall health assessment, and the safety of the battery pack to ensure that multiple battery cells work together.
Balanced management
Single BMS: does not involve battery balancing function.
Battery pack BMS: It is necessary to manage the voltage differences of multiple battery cells in the battery pack through the balancing circuit (passive or active balancing) to optimize the performance of the battery pack.
Communication and Integration
Single BMS: Communication is relatively simple, usually exchanging data with only a single battery.
Battery pack BMS: complex two-way communication with multiple single battery BMS and external devices through communication buses (such as CAN bus) to coordinate the overall work of the battery pack.
Safety and protection
Monomer BMS: protects the monomer battery from the risks of overcharge, overdischarge, overcurrent, and overtemperature.
Battery pack BMS: In addition to the protection of individual cells, it is also responsible for battery pack level protection to ensure voltage balance and temperature distribution between cells within the battery pack and prevent overall system failure.
Life Management
Single BMS: Focus on the health state (SOH) and remaining life of the single battery.
Battery pack BMS: By assessing the SOC and SOH of the entire battery pack, it predicts the life of the battery pack and optimizes the maintenance and use of the battery pack.
low-speed car batteries
Low-speed vehicle battery is a kind of battery designed for low-speed electric vehicles, which has the characteristics of clean, environmental protection, high efficiency and economy, and is widely used in electric golf carts, low-speed electric vehicles (LSV), mobile vendors, campus transportation, cargo trucks and so on
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