现代储能系统中使用的锂离子电池确实可以提供卓越的性能，但对每个电池单元进行密切监控至关重要，以确保其正确充电并避免不平衡、过度充电、深度放电或过热。为此，需要为每个电池单元或电池阵列提供独立、隔离的电源电压控制电路。

 

对于标称电压高达48V的电池阵列，可以使用标准工业DC/DC电源转换器模块，这些模块提供500V或1600V的隔离屏障。然而，对于更高功率的系统，尤其是那些连接到交流电源并提供数百千瓦时甚至数兆瓦时储能容量的系统，电池阵列的电压可以达到600-800V。这种情况下，需要具有更高隔离屏障的解决方案。

 

为了增强抗噪能力，P-DUKE提供了一系列拥有5kV隔离屏障的医疗级电源转换器，超过了4kV的项目需求。在该项目中，选择了MPD30-24S12模块，该模块能够从公共24V直流总线产生必要的12V/30W电源电压。

 

通常的工业级30W DC/DC电源转换器的输入输出电容高达1500pF。如果并联多达200个转换器，电池单元（通过充电器连接到交流电网）和24V总线之间的总电容可能达到300nF，这会导致超过20mA的交流漏电流。而漏电流超过10mA可能会引发严重的触电风险和事故。

 

然而，MPD30-24S12的输入输出电容仅为20pF，即使并联200个转换器，总电容也只有4nF，漏电流低于1mA。这种极低的电容还避免了瞬态或任何噪声通过转换器耦合到中央电池管理系统的敏感通讯信号中。因此，这种解决方案有效解决了4kV隔离和低漏电流的要求。

 

在整个安装过程中，通信系统的中央BMS控制器使用WiFi路由器，并通过以太网由25W的53V电源供电。根据安装，电源电压可以由230Vac主电源或内部24Vdc总线提供。对于230Vac电源，可以使用TSD30系列转换器。此外，该系列还提供DIN导轨式版本，便于安装在控制器机架中。

The lithium-ion batteries used in modern energy storage systems can indeed provide excellent performance, but close monitoring of each battery unit is crucial to ensure proper charging and avoid imbalance, overcharging, deep discharge, or overheating. For this, it is necessary to provide independent and isolated power supply voltage control circuits for each battery unit or battery array.

For battery arrays with a nominal voltage of up to 48V, standard industrial DC/DC power converter modules can be used, which provide isolation barriers of 500V or 1600V. However, for higher power systems, especially those connected to AC power and providing energy storage capacity of hundreds or even megawatt hours, the voltage of the battery array can reach 600-800V. In this case, a solution with higher isolation barriers is needed.

In order to enhance noise resistance, P-DUKE offers a range of medical grade power converters with 5kV isolation barriers, exceeding the project requirements of 4kV. In this project, the MPD30-24S12 module was selected, which can generate the necessary 12V/30W power voltage from the common 24V DC bus.

The input and output capacitance of a typical industrial grade 30W DC/DC power converter can reach up to 1500pF. If up to 200 converters are connected in parallel, the total capacitance between the battery unit (connected to the AC grid through a charger) and the 24V bus may reach 300nF, which can result in AC leakage currents exceeding 20mA. Leakage current exceeding 10mA may cause serious electric shock risks and accidents.

However, The input and output capacitance of MPD30-24S12 is only 20pF, even if 200 converters are connected in parallel, the total capacitance is only 4nF, and the leakage current is less than 1mA. This extremely low capacitance also avoids transient or any noise coupling into the sensitive communication signal of the central battery management system through the converter. Therefore, this solution effectively addresses the requirements of 4kV isolation and low leakage current.

Throughout the installation process, the central BMS controller of the communication system uses a WiFi router and is powered by a 25W 53V power supply via Ethernet. According to the final installation, the power supply voltage can be provided by a 230Vac main power supply or an internal 24Vdc bus. For a 230Vac power supply, the TSD30 series converter can be used. In addition, the series also offers a DIN rail version for easy installation in the controller rack.