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Home > Blog>Daly BMS: Contrasting Energy Storage and Power Battery Modules

Comparing Energy Storage and Power Battery Modules in Daly BMS

daly BMS

Daly Battery Management System distinguishes between Energy Storage Battery Management Systems (ES-BMS) and Power Battery Management Systems (PB-BMS) based on several key factors:

Functional Interactions:

  • ES-BMS: Within energy storage systems, the ES-BMS orchestrates interactions primarily between the energy storage converter and high-voltage energy storage batteries. This involves power exchange between the AC grid and the battery pack, managed through the converter. Communication of crucial status data occurs between the ES-BMS, converter, and the energy storage power station's dispatching system (PCS).
  • PB-BMS: In contrast, PB-BMS in electric vehicles interacts with the electric motor and charger at high voltage. It communicates extensively with the vehicle controller during the entire operational cycle, specifically during the charging process.

Hardware Architecture:

  • ES-BMS: Energy storage management systems generally adopt a two-layer or three-layer model, with larger systems typically using a three-layer structure to accommodate the scale of energy storage.
  • PB-BMS: Power battery management systems predominantly employ either a centralized single-layer or a two-layer distributed system. Smaller vehicles usually incorporate a centralized one-layer system or a two-layer distributed system.
  • From a functional standpoint, the modules in ES-BMS's first and second layers align with PB-BMS's first-layer acquisition module and second-layer main control module. ES-BMS's third layer handles the complexity arising from managing extensive energy storage, analogous to appointing multiple layers of management as a department grows in size.

energy management system

Communication Protocols:

  • ES-BMS: Internal communication within the energy storage battery management system predominantly employs the CAN protocol. However, communication with external systems, notably the energy storage power station's PCS, often involves the use of the TCP/IP protocol.
  • PB-BMS: Power batteries within electric vehicles utilize the CAN protocol for both internal component interactions within the battery pack and external communication between the battery pack and the vehicle.

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