With the development of high-power light-emitting diodes (LEDs), the heat flux density of devices has continued to increase, which, in turn, requires the development of increasingly effective methods of heat dissipation to control the working temperature of LEDs. Due to their impressive performance in solid refrigeration and energy harvesting, thermoelectric devices such as thermoelectric coolers (TECs) and thermoelectric generators (TEGs) have been used to develop the methods of heat dissipation, which have been applied to power components and electronic devices. This article proposes a delayed electrothermal collaborative cooling system based on a TEC–TEG system that uses an auxiliary charging technique for energy harvesting. In the designed delay circuit, two power source rails containing a TEG and a charged capacitor are switched automatically to supply energy to a TEC according to the charge on the capacitor and the discharge time of the delay circuit used for energy transmission. The results of experiments show that using the proposed scheme, the electromotive force can be increased by 21.6%, from 0.37 to 0.45 V, in the TEG module compared with the collaborative electrothermal cooling system without auto-delayed power rail switching. The switching time cost of the proposed system was only 0.8 s, and it could continuously supply enough electromotive force to drive the TEC and the overall cooling system. The proposed electrothermal collaborative cooling system with delayed power rail switching and auxiliary charging can improve energy utilization and reduce device cost, which helps to efficiently manage heat dissipation in high-power LEDs.

中文翻译：

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考虑大功率LED能量收集机制的延迟电源导轨开关辅助充电的电热协同冷却

随着大功率发光二极管（LED）的发展，器件的热通量密度持续增加，这反过来又需要开发越来越有效的散热方法来控制LED的工作温度。由于它们在固体制冷和能量收集方面的出色表现，诸如热电冷却器（TEC）和热电发电机（TEG）之类的热电设备已被用于开发散热方法，这些方法已应用于功率组件和电子设备。本文提出了一种基于TEC–TEG系统的延迟电热协同冷却系统，该系统使用辅助充电技术进行能量收集。在设计的延迟电路中 根据电容器上的电荷和用于能量传输的延迟电路的放电时间，两个包含TEG和已充电电容器的电源轨自动切换为TEC提供能量。实验结果表明，与不带自动延迟电源切换的协同电热冷却系统相比，使用该方案，TEG模块中的电动势可以从0.37 V提高到21.65 V，提高了21.6％。拟议系统的切换时间成本仅为0.8 s，它可以持续提供足够的电动势来驱动TEC和整个冷却系统。提议的电热协作冷却系统具有延迟的电源切换和辅助充电功能，可以提高能源利用率并降低设备成本，