支持Qi无线充电的可充电AA电池
A rechargeable AA battery supporting Qi wireless charging
AI总结:
研究提出一种尺寸和输出电压与标准AA电池相同但支持Qi无线充电的电池。核心方法是采用含弯曲接收线圈的串联谐振电路等。主要贡献是为多种电子设备通用地增添无线充电功能。
摘要:
无线电力传输是现代消费电子产品的关键驱动力之一,它能提升许多设备的便利性和可用性。然而,大多数情况下,无线充电仅适用于内置接收器的设备或至少适用于带有标准充电连接器(如USB Type-C)以连接外部接收器的小工具。我们提出一种可充电电池,其尺寸和输出电压与标准AA电池相同,但支持来自广泛使用的Qi标准充电站的无线电力传输。所提出的设计使用带有弯曲接收线圈的串联谐振电路,以及使用由微控制器单元切换的失谐电容器进行负载调制,以实现与Qi基线协议兼容的接收器。它还利用多个DC-DC转换器将能量存储在锂离子电池中并将其转换为1.5V电压电平。我们的设计得到了与平面发射线圈耦合的引入电池的磁场分布和散射参数的数值模拟的支持。对所提出电池的性能进行了实验研究,包括测量电池与允许在各种旋转角度进行无线充电的充电站之间的最大距离以及充电曲线。所开发的电池设计以通用方式促进了向广泛的电子设备添加无线充电功能。
英文摘要:
Wireless power transfer is one of the key drivers in modern consumer electronics, as it allows one to enhance the convenience and usability of many devices. However, in most cases, wireless charging is accessible only to devices with incorporated receivers or at least to gadgets with standard charging connectors, such as USB Type-C, that allow to attach an external receiver. We propose a rechargeable battery that has the size and output voltage of a standard AA battery but supports wireless power transfer from charging stations of the widely used Qi standard. The proposed design uses a series resonant circuit with a curved receiving coil, as well as load modulation using detuning capacitors switched by a microcontroller unit to implement a receiver compatible with the Qi Baseline protocol. It also utilizes a number of DC-DC converters to store energy in a Li-ion cell and convert it to the 1.5 V voltage level. Our design is supported by numerical simulations of magnetic field distributions and scattering parameters of the introduced battery coupled to a planar transmitting coil. The performance of the proposed battery has been studied experimentally, including measurements of the maximal distance between the battery and a charging station that allows wireless charging at various rotation angles and the charge curve. The developed battery design facilitates the addition of wireless charging functionality to a wide range of electronic devices in a universal way.
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