Measurements of radiation emission of a portable power bank with a capacity of 10400 mAh

The dataset contains the emission measurement results that are part of comprehensive tests carried out for portable power banks with different capacities. The measurements were performed in the frequency range from 30 MHz to 3 GHz using a Gigahertz Transverse Electromagnetic (GTEM) cell (Fig. 1). The test setup was configured to measure a portable power bank for various modes of operation. The data represents emission test results for a portable power bank with a capacity of 10400 mAh, consisted of rechargeable lithium-ion batteries installed in a protective cover, guided by a printed circuit board with DC-DC converter based on pulse frequency modulation technology. The basic parameters of the examined power bank are input rating of DC 5 V, 2 A, output rating of DC 5 V, 1 A or 2 A, mini USB input port, and double USB output port. Radiated emissions measurements of electrical and electronic devices are carried out under the requirements set out in the standards of electromagnetic compatibility (EMC). The standard environment for emission measurements in the frequency range from 30 MHz to 3 GHz is the OATS (Open Area Test Site). A GTEM cell is an alternative measurement method, which allows evaluating the radiated EMC interference emitted from small electrical and electronic equipment. The results of the measurements carried out in the GTEM cell are the basis for the estimation of an equivalent OATS field strength. The comprehensive tests were performed for different cases in charge and discharge mode, respectively. In a discharging condition, the power bank was connected to a typical smartphone. To become independent of the type of load, in this mode of operation, the test was carried out for a resistive load, with two different load currents, 0.5 A and 1 A, respectively, resulting from the technical specifications of the power banks. The emission test was also performed when the power bank was in standby mode without a USB cable. The measurement results reported undesirable effects related to the power bank’s operation. It was shown that the higher intensity of the electric field strength was caused by the tested power bank as well as devices connected to it. The attached dataset contains files described as follows: EMI Report_capacity_mode of operation.Mode of operation: standby mode, without the USB cable, discharge mode 2_1A. a resistive load, load current equal to1 A, 2_2. a power bank connected to the smartphone Samsung J3, 2_0.5A a resistive load, load current equal to 0.5 A, charge mode, a power bank connected to an AC mains outside or inside of the GTEM. Additionally, a file EMI Report_surroundings.pdf containing the results of the measurements carried out with the GTEM door open without the power bank was attached. EMI Report includes a hardware setup, EMI Auto Test Template, a spectrum of the radiated emission of the power bank in the OATS and on the GTEM cell’s output, and the final results of spectral components of the emission spectrum. Figure 1. The measurement setup

本数据集包含针对不同容量便携式移动电源开展的综合测试中的电磁发射测量结果。测试在30 MHz至3 GHz的频率范围内进行，采用吉赫兹横电磁波（Gigahertz Transverse Electromagnetic, GTEM）室（图1）完成，测试配置用于对便携式移动电源的多种工作模式开展测量。
本次测试的数据对应一款容量为10400 mAh的便携式移动电源的发射测试结果，该电源采用可充电锂离子电池组装于防护外壳内，由搭载基于脉冲频率调制技术的DC-DC转换器的印刷电路板进行管控。该被测移动电源的基本参数为：直流输入额定值5 V、2 A，直流输出额定值5 V、1 A或2 A，配备迷你USB输入接口与双USB输出接口。
电气电子设备的辐射发射测量需符合电磁兼容（Electromagnetic Compatibility, EMC）相关标准的要求。频率范围30 MHz至3 GHz的发射测量的标准测试环境为开阔场测试场地（Open Area Test Site, OATS）。GTEM室是一种替代测量方案，可用于评估小型电气电子设备产生的辐射式EMC干扰。在GTEM室内获取的测量结果可作为等效OATS场强估算的依据。
本次综合测试分别针对充电与放电模式下的多种工况开展。放电工况中，移动电源连接至典型智能手机。为消除负载类型对测试结果的影响，该工作模式下采用电阻性负载开展测试，分别设置0.5 A与1 A两种负载电流，该参数由移动电源的技术规格确定。此外，还在未连接USB线缆的待机模式下完成了发射测试。
本次测量结果反映了该移动电源运行过程中产生的不良电磁效应。测试表明，被测移动电源及其外接设备会产生更高的电场强度。
本数据集附带文件EMI Report_capacity_mode of operation，其涵盖的工作模式包括：待机模式（未连接USB线缆）、放电模式2_1A（电阻性负载，负载电流为1 A）、2_2（移动电源连接三星J3智能手机）、2_0.5A（电阻性负载，负载电流为0.5 A）、充电模式（移动电源连接至交流市电，可置于GTEM室内或室外）。
此外，数据集还附带了文件EMI Report_surroundings.pdf，该文件包含GTEM室门打开且未放置移动电源时的测量结果。每份EMI Report文件均包含硬件测试配置、EMI自动测试模板、移动电源在OATS与GTEM室输出端口的辐射发射频谱，以及发射频谱的频谱分量最终结果。
图1：测试设置