- Identify parts of the E-Cig that constitute voltage, Â current, and resistance. Discuss the role each plays in the E-Cig and Â typical values for each including units.
In this section of our discussion, the components of the E-Cig and Â their functions in relation to Ohm’s Law factor (i.e., current, voltage, Â and resistance) will be summarized. The rechargeable battery is the Â voltage source (sometimes called the electromotive force (EMF) that Â causes electrons to flow (current) through the light and heater. The Â example E-cig in figure 1 shows the two resistors (i.e., the heater and Â light (LED) represented byÂ
and Â Since the current divided equally by each resistorÂ
, Â the voltage (4.2v) is the same across each resistor (parallel Â resistors). The current leaving (1.909A) the battery is equal to the Â current returning to the battery. The heater applies energy Â (vaporization to the nicotine/liquid cartridge when the user inhales or Â pulls on the E-cig. The integrate circuit (I.C. or microprocessor) Â controls the heater and light. The microprocessor has an applied voltage Â and current (although relatively small when compared to the other Â components). The operation of the microprocessor is beyond the scope of Â our present course/discussion
*Discuss the electrical dangers of an E-Cig. Give specific examples.Â
E-cig accidents are most often caused by the rechargeable batteries. Â Explosions can be caused by overcharging, incompatible chargers, and the Â improper handling of carrying spares in the pocket with the terminals Â exposed to other metal objects like car keys and coins. In 1991, the Â relative new lithium-ion battery replaced the older lithium metal Â battery which was very explosive.
The user should never use the E-cig while it is being charged. There Â is a chance of too much current draw and overheating which could result Â in damage to the E-cig circuit components and an electric shock to the Â user. The subject of electric shock by such a small device might seem Â unusual. To briefly explain the phenomena of electric shock, there is a Â relatively small current necessary to cause electric shock in a human. Â Here is a brief representation of values of current and their possible Â effects on a human.
*.001A or 1ma (Threshold of Sensation)
*.01A or 10ma (Mild Sensation)
*.01A to 0.1A or 10ma to 100ma (Painful to Breathing difficulties)
*0.1A to 0.2A or 100ma to 200ma (Death)
*0.2A to 1A or 200ma to 1000ma (Breathing Stops, Severe Burns)
*There are many electrical safety rules.Â Pick one, and discuss its application on a small system, such as the E-Cig.
One safety measure on a small system Â such as an E-cigarette would be to always keep the terminals separated Â and therefore prevent electrical shortages. One example of how ignoring Â this preventative measure could be even more dangerous when applied to Â an automotive system would be to allow a tool such as a long screwdriver Â to come into contact with the positive and negative terminals of the Â large battery (12-V) in an automobile. This “dead short” can produce a Â high level of current (i.e., 600A, 400A, 300A, etc.) Even though this 12 Â V has relatively low voltage the cranking amps of the battery can be as Â high as 800A. Consider the Power Formula (P=IV)Â Â Â Â P= (800A) (12V) = Â 9,600watts or 9.6kw
Schultz, M.E. 2016.Â Grob’s Basic Electronics 12th edition Pg 95-96.
Velvet Cloud. (2018, June 19).Â OHM’S LAW 101 AND E-CIG TECH: Understanding Vape Electrical Lingo. Retrieved from Velvetcloud: https://velvetcloud.com/blogs/news/ohms-law-101-and-e-cig-tech-understanding-vape-electrical-lingo