Micro energy harvesting management system with low current start and voltage monitoring function
A voltage monitoring, collection and management technology, applied in the field of micro-energy collection, can solve the problems of slow-satisfying system load chips, normal power consumption, abnormal system operation, etc., to achieve the effects of ensuring normal power consumption, expanding the space range, and improving sensitivity
Active Publication Date: 2021-07-20
湖北集慧科技有限公司
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Problems solved by technology
[0007]
At the same time, when the existing micro-energy collection management system is working, the system load chip and other chips are often working all the time. When the system collects energy slowly, it is very slow to meet the normal power consumption of the system load chip, which leads to the failure of the system to work. abnormal
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[0060] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0061] refer to figure 1 , figure 1 It is the principle diagram of the first embodiment of the micro-energy collection management system with low current start and voltage monitoring function of the present invention. The micro-energy collection and management system that can be started at 0.9V and 160nA in this embodiment includes: a first energy storage device C1, a DC / DC conversion chip U2, a first voltage monitoring chip U1, a first diode D1, a first Resistor R1, second resistor R2, second resistor R3, first N-type switch tube Q1, second diode D2, second energy storage device C2, first P-type MOS tube Q2, second P-type MOS tube Q3 , the second voltage monitoring chip U3, the pull-up resistor R4, the second N-type ...
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The invention discloses a micro-energy collection and management system with low-current startup and voltage monitoring function. The invention can be used for energy collection in environments such as weak light, low vibration intensity, and small temperature difference. In the collection scene, a micro-energy collection and power management system that can be started at 0.9V, 160nA is realized, and the start-up power of energy collection is reduced to 0.144μW, which can significantly improve the sensitivity of energy collection. After testing, the minimum The RF input power -21dBm@915MHz can effectively expand the spatial range of RF energy collection; at the same time, by adding the voltage monitoring function, it can ensure the normal power consumption of the system.
Description
technical field [0001] The invention relates to the field of micro-energy collection, and more specifically relates to a micro-energy collection management system with low current start and voltage monitoring function. Background technique [0002] Energy harvesting is a key technology to enable long-term maintenance-free operation of low-power circuit systems such as passive IoT. By capturing these energies in the environment, such as lighting, temperature differences, vibrations, and electromagnetic waves (radio frequency energy), low-power electronics can function properly. Among these micropower sources, energy from RF transmitters has unique advantages, including predictable and consistent power over distance, enabling passive IoT away from the constraints of batteries and wired power. [0003] Capturing ambient RF energy is now available from tens of billions of wireless transmitters around the world, and the number is growing, including mobile phones, handheld radios...
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IPC IPC(8): H02J50/20H02J7/34H02J15/00
CPCH02J7/34H02J7/345H02J15/00H02J50/20
Inventor 谢桂辉焦向开徐浪魏权刘子扬
Owner 湖北集慧科技有限公司