Building a new type of power system with new energy as the main body has become a global consensus, and the concept of energy storage has become popular. The energy storage market in China has also developed rapidly in recent years. Among them, electrochemical energy storage is the most controversial and attracting attention.

Today we will talk about the three major terms in electrochemical energy storage: BMS, EMS, and PCS.

Composition of 01 Energy Storage System

A complete electrochemical energy storage system mainly consists of battery packs, battery management systems (BMS), energy management systems (EMS), energy storage converters (PCS), and other electrical equipment.

In the energy storage system, the battery pack feeds back status information to the battery management system BMS, which shares it with the energy management system EMS and the energy storage converter PCS; EMS distributes control information to PCS and BMS based on optimization and scheduling decisions to control the charging and discharging of individual batteries/battery packs.

Battery Management System BMS: plays a perception role, mainly responsible for monitoring, evaluating, protecting, and balancing batteries; Energy Management System EMS: plays a decision-making role, mainly responsible for data collection, network monitoring, and energy scheduling; Energy storage converter PCS: plays an executive role, mainly controlling the charging and discharging processes of the energy storage battery pack, and performing AC/DC conversion.

02 BMS (Battery Management System)

BMS (Battery Management System), commonly known as a battery nanny or battery butler, is a device that monitors the status of energy storage batteries. The battery cells together form the battery system.

BMS measures the basic parameters of the battery, including voltage, current, temperature, etc., to prevent overcharging and discharging, and extend the battery's service life.

BMS needs to calculate and analyze the SOC (remaining battery capacity) and SOH (battery health status) of the battery, and report abnormal information in a timely manner.

04 PCS (bidirectional converter)

The energy storage inverter PCS, also known as the bidirectional energy storage inverter, is the core component between the energy storage system and the power grid to achieve bidirectional flow of electrical energy. It is used to control the charging and discharging processes of batteries and perform AC/DC conversion.

In recent years, the global energy storage market has exploded, and the demand for PCS has increased. Domestic manufacturers are constantly expanding overseas markets, and research on PCS has become a hot topic of concern.

PCS working principle: The working principle of the energy storage converter is a controllable four quadrant operation converter device on the AC and DC sides, achieving bidirectional conversion of electrical energy between AC and DC. The principle is to use microgrid monitoring commands for constant power or current control, to charge or discharge batteries, while smoothing the output of fluctuating power sources such as wind and solar power.

Product characteristics of Sino Soar's bidirectional energy storage converter

✔ Intelligent and efficient

Advanced three-level circuit topology with a maximum conversion efficiency of 98%

Wide DC voltage range, 600-950V

Advanced control algorithms with multiple operation modes including constant current, constant voltage, and constant power available

Equipped with off grid output function

Supports long-term overload operation at 110% rated power, and overload at 150% rated power for 10ms

Stable operation of intelligent air cooling and liquid cooling

✔ Economically friendly

Ultra high power density, smaller volume with equal power

Integrated design for easy transportation and integration

Support multi machine AC/DC parallel connection and flexible expansion

Independent modular architecture, convenient maintenance

✔ Safe and reliable

Complete battery protection and maintenance strategies to improve battery life

Protection against overcurrent, overheating, overload, overvoltage, short circuit, lightning protection and grounding

Equipped with zero voltage and high voltage traversal functions, with strong adaptability to the power grid

High performance DSP, optimized control circuit design, more stable system

Adapt to harsh environments of low temperature, high humidity, and high altitude

✔ Smart Internet

Supports RS485, Ethermet, and CAN communication methods, and can receive BMS commands in real-time

Support MODBUS-RTU/MODBUS-TCP/CAN2.0B/

About us

Sino Soar was established in 2015 and is located in Shenzhen, the electronic city of China. The company is committed to providing users with system solutions for power monitoring, power quality management, electrical safety, etc. It is a national high-tech enterprise specializing in the research and development, manufacturing, sales, and service of power electronic devices.

The company's main products include PCS energy storage converters, optical storage integrated machines, and energy storage system