便携式设备锂电池充电技术研究

发布时间：2019-06-24 20:22

【摘要】：随着电子技术的快速发展，智能手机、平板电脑等便携式设备的功能变得更加丰富，给生活和通讯带来了极大的便利，同时也增加了消费者使用便携式设备的频率。然而目前便携式设备中锂电池的电量无法给设备提供较长的续航时间，人们在外出时经常会遇到手机没电等问题。此外，目前便携式设备大多采用有线充电的方式，如果消费者找不到数据线就无法给移动设备充电。因此采用无线充电方式给便携设备充电的相关产品，开始逐渐在市场上出现。本文针对便携式设备锂电池充电问题，分别设计了移动电源和无线充电器，从而满足消费者对充电方式的不同需求。移动电源自身携带了大容量的锂电池组，升压模块将电池电压升高后，通过USB数据线给便携式设备充电。此款移动电源具有较高的电能转化效率，并且具有两个USB输出口可同时为两个便携式设备充电。无线充电器虽然电能转换效率不高，但在充电过程中便携式设备无需通过USB数据线与其连接，充电方式更为便捷。本文设计的移动电源中主要包括基于ASC8513的锂电池充电模块，基于ME2109和FP6291的升压模块，以及S-8261ABPMD锂电池保护模块，通过HT46R065B单片机实现系统控制。此款移动电源自身的最大充电电流和输出电流均可达到2A，比普通产品的1A电流高出1倍，并具有多重电路保护和自动开机、关机等人性化功能。无线充电器通过Atmega16单片机产生频率可调的方波来驱动全桥逆变器，将直流电能转换为变化的磁场，，最后传递到接收端将其转为电能给锂电池充电。此款无线充电器开机后能够自动识别负载，并在充电过程中时刻检测电流、电压等反馈信号，从而控制系统在安全的范围内工作。
[Abstract]:With the rapid development of electronic technology, the functions of portable devices such as smartphones and tablets have become more abundant, which has brought great convenience to life and communication, and also increased the frequency of consumers using portable devices. However, at present, the power of lithium battery in portable devices can not provide a long life for the device, people often encounter mobile phone power and other problems when they go out. In addition, most portable devices use wired charging, if consumers can not find a data line to charge mobile devices. Therefore, the use of wireless charging mode to charge portable devices related products, began to gradually appear in the market. In this paper, aiming at the charging problem of lithium battery, mobile power supply and wireless charger are designed respectively to meet the different needs of consumers for charging methods. The mobile power supply itself carries a large capacity lithium battery pack, and the boost module increases the battery voltage and charges the portable device through the USB data line. This mobile power supply has high power conversion efficiency and has two USB ports to charge two portable devices at the same time. Although the power conversion efficiency of wireless charger is not high, the portable device does not need to be connected to it through USB data line in the charging process, and the charging mode is more convenient. The mobile power supply designed in this paper mainly includes lithium battery charging module based on ASC8513, boost module based on ME2109 and FP6291, and S-8261ABPMD lithium battery protection module, which is controlled by HT46R065B single chip microcomputer. The maximum charging current and output current of this mobile power supply can reach 2A, which is twice as high as the 1A current of ordinary products, and has multiple circuit protection, automatic boot, shutdown and other humanized functions. The wireless charger drives the full-bridge inverter through the square wave with adjustable frequency generated by Atmega16 single chip microcomputer, converts the DC electric energy into a changing magnetic field, and finally transmits it to the receiver to convert it into electric energy to charge the lithium battery. This wireless charger can automatically identify the load after switching on, and detect current, voltage and other feedback signals at all times in the charging process, so as to control the system to work in a safe range.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM912

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