Energy storage systems (ESS) can store energy from different power generation methods (coal, nuclear, wind, solar, etc.) in various forms, such as electrochemical energy storage, mechanical energy storage, etc. Battery Energy Storage System (BESS) is widely used in both residential and commercial scenarios and is a popular research field.

In residential scenarios, battery energy storage systems can serve as backup power sources to avoid sudden power outages. At the same time, by transferring electricity from low electricity price periods to high electricity price periods, they help users save on electricity costs. In commercial scenarios, the scale of energy storage systems is usually larger, which can efficiently store and manage the clean energy generated by solar inverters, thereby achieving low-carbon emissions. Nowadays, another key role of battery energy storage systems is to alleviate the pressure on the power grid caused by the increasing demand for electric vehicle (EV) charging. This article will comprehensively introduce energy storage systems and market conditions, as well as onsemi's leading products and solutions.

Block diagram - AC coupled battery energy storage system

The following figure shows the AC coupled battery energy storage system solution recommended by Ansenmei. This system achieves AC energy storage through the use of an inverter, combining flexibility and reliability. Ansenmei offers key products including discrete silicon carbide (SiC) devices and IGBTs, power modules, isolated gate drivers, and power management controllers, suitable for residential and commercial applications.

Block diagram - DC coupled battery energy storage system

The following figure shows the recommended DC coupled battery energy storage system solution by Ansenmei. The system directly stores electrical energy from photovoltaic modules, minimizing conversion losses and ensuring system efficiency. The key products provided by Ansenmei include discrete silicon carbide (SiC) devices and IGBTs, power modules, isolated gate drivers, and power management controllers, suitable for residential, commercial, and utility applications.

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Power module solution for battery energy storage system

图 1：三电平 I-NPC 拓扑

Three level I-NPC and three-level ANPC are common bidirectional topologies in power conversion systems (PCS), which can meet the increasing demand for output power. Compared to two-level topology, three-level topology requires more components, driving signals, and more complex control structures. But its advantages are also very obvious: the three-level structure can effectively reduce power loss and current ripple (due to halving the voltage it can withstand), and has better anti electromagnetic interference (EMI) performance.

·The NXH800H120L7QDSG is Ansenmi's latest QDual3 series 1200V 800A half bridge IGBT power module, which has lower conduction and switching losses, achieving high efficiency and excellent reliability. By paralleling multiple QDual3 modules, a three-level ANPC module can be formed, and the system's set output power can reach up to 1.6MW to 1.8MW.

·NXH600N105L7F5S1HG is the latest F5BP series 1050V 600A I-NPC IGBT power module launched by Anson Mei. The F5BP module exhibits excellent thermal performance, with a thermal resistance 9% lower than that of the F5-PIM module. It combines silicon (Si) and silicon carbide (SiC) devices, optimizes design flexibility, supports 1500V DC systems, and is an ideal choice for utility level applications.

图 3： QDual3 封装

图 4： F5BP 封装

DESAT (desaturation) is one of the preferred important protective measures in high-power conversion. It can prevent IGBT/MOSFETs from being damaged due to short circuits by quickly turning off the switching devices.

The NCD57000 integrates a desaturation detection function. When the VCESAT reaches the set threshold, the internal STO (soft turn off) MOSFET will be activated, discharging the gate capacitor to reduce overvoltage stress and losses caused by high dV/dt.

In addition, this single channel gate driver also has a pull current capability of up to 4A/6A, electrical isolation of 5 kVrms, and other protection functions such as undervoltage lockout (UVLO), active Miller clamp, etc.

About The Author

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry

They are committed to providing customers around the world with the most necessary, outdated, licensed, and hard-to-find parts.

Media Relations

Name: John Chen

Email: salesdept@topcomponents.ru

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry. They are committed to p with the most necessary, outdated, licensed, and hard-to-find parts.

Media Relations Name: John Chen

Email: salesdept@topcomponents.ru