IEC 62830-7:2021 pdf download.Semiconductor devices - Semiconductor devices for energy harvesting and generation
1 Scope
This part of IEC 62830 defines terms, definitions, symbols, configurations, and test methods that can be used to evaluate and determine the performance characteristics of linear sliding mode triboelectric energy harvesting devices for practical use. This document is applicable to energy harvesting devices for consumer, general industries, military and aerospace applications without any limitations on device technology and size.
3.1.2 sliding-based energy harvester
energy transducer that transforms physical sliding energy into electrical energy
Note 1 to entry: A linear sliding mode triboelectric energy harvester to convert linear sliding to electricity comprises dielectric materials, a surface electrode, an external load, and a relative displacement between dielectric materials as shown in Figure 1. The sliding makes the two dielectric material surfaces come into physical touch, and relative displacement makes the gap between those two materials. The top and bottom electrodes on the two dielectric materials harvest charges generated from the coupling of triboelectrification and electrostatic induction. The triboelectric charges are generated by the charge transfer between two thin organic/inorganic films that exhibit distinct surface electron affinity, and the potential difference results from the separation of the triboelectric charges; under short-circuit conditions, electrons are driven to flow between two electrodes attached on the back side of the films through the load in order to balance the potential difference resulting from mechanical action.
3.3.9 contact area
area of physical contact of one object with the other object
Note 1 to entry: When two objects touch, a certain portion of their surface areas will be in contact with each other.The contact area is the fraction of this area that consists of the atoms of one object in contact with the atoms of the other object. Because objects are never perfectly flat because of asperities, the actual contact area (on a microscopic scale) is usually much less than the contact area apparent on a macroscopic scale. The contact area may depend on the normal force between the two objects because of deformation.
5.1 General
Basically, general test procedures for a linear sliding-based energy harvester are performed as shown in Figure 3. After the linear sliding mode triboelectric energy harvester has been mounted on a test fixture, it is measured by using an oscilloscope/electrometer and a linear variable differential transformer (LVDT). For measuring and characterizing these devices accurately, ultra-high-impedance meters should be used. Before connecting the triboelectric energy harvester to the test fixture, measuring meters shall be calibrated. After calibration,connect a test cable to the energy harvester test fixture mounted on an actuator or a force gauge. The output voltage or current reading on the display of the meters is carefully taken,together with induced linear displacement, which is measured by the LVDT.IEC 62830-7 pdf download.