22 Years' Battery Customization
Oct 31, 2020 Pageview：525
As we continue to have more advancements in electronics and other related fields, the need for a more efficient energy system keeps staring us in the face. Engineers and tech enthusiasts don’t seem like they are slowing down in their efforts to help us with robust batteries.
From the lead acid batteries to lithium batteries to super-capacitors, the trend have been quite obvious and self-explanatory. Therefore, during the course of this post, you will be learning how a capacitor battery works, as well as whether it is the right fit for someone like you.
Whenever we talk about capacitor batteries many people are quick to assume it to be the same as the regular capacitors. That is totally wrong. Capacitor batteries and regular capacitors are not exactly the same in various aspects.
Capacitor batteries are clearly different from ordinary batteries. They are composed of static electric charges that are built up on the capacitor plates. Unlike what you have with normal batteries that generate energies via electrochemical reactions. The charges you get from these capacitors are as a result of the static charges and nothing more. This is possible when a voltage differential is applied on the negative and positive plate of the capacitor, thereby leading to its charging and storage of charges. Quite similar with what happens when you comb your hair with a plastic comb.
Capacitors are different from batteries in a couple of ways;
?For batteries, you must have an electrolyte that will separate the two electrodes, which are the cathode and anode poles. The electrolyte can be anything that has the ability to conduct ions. In sharp contrast, the negative and positive plates of a capacitor are separated by an insulator. That is, something that is not a conductor of electricity. In the early days, the insulator used to be air. Engineers needed to think of something else since such air-insulators could not hold up much charges as they wanted.
?Some batteries comprise chemicals that are not environmentally friendly. Such batteries will need to be recycled when they can no longer hold charges. For capacitors, you can hardly have anything like that. Their gaps are made from insulators that are not harmful to the environment.
?The quantity of stored energy you can get from a capacitor is varied according to a number of factors. Those factors are not the same with what defines the amount of stored energy that is possible with batteries.
Capacitors look every inch like their battery counterparts, given how they are charged and how they can also deliver stored energy. However, it will be wrong for one to substantially state that these two are exactly the same. Let us see how they are similar or equivalent but aren’t exactly the same.
?Potential energy – capacitors store their potential energy in their electric field, whereas batteries store theirs in a chemical form so they can be converted to electrical energy later.
?Circuit component – while batteries remain active components in any circuits they find themselves, capacitors are seen as passive in their circuit set up.
?Energy density – capacitors and batteries are largely different in this regards. Capacitors do not have as much energy-density as batteries have, which makes them highly unsuitable for high energy applications.
?Discharging and charging rates – capacitors charge and discharge their batteries faster than batteries since they store their charges directly on the plates. Batteries charge and discharge relatively slower than capacitors due to the transition from chemical to electrical energy.
?Discharge rate – when a capacitor is discharging it does that in a single swoop. But when a battery is discharging it will take longer.
?Output voltage – in capacitors, voltage value will keep decreasing as you continue to use it. But for batteries, the output voltage is always the same regardless of how long you use it.
?Cost – when comparing these two items on the basis of cost, one is more expensive than the other. Capacitors seem to be far more expensive than batteries.
?Primary components – capacitors comprise thin sheet metals that separated by insulator, whereas batteries are composed of metal plates and chemicals in the form of electrolyte.
Capacitors and batteries may look very much alike in their manner of operations, but they are quite different when you look at them closely. And that is exactly what we have just done.
Anytime a capacitor is connected to a battery charges move from the battery to the plates of the capacitor. That would lead to capacitor to be charged to the optimal level, depending on how much energy the battery can give out.
But the real question is what happens after the capacitor has been charged to the highest level. Is it going to continue to consume the battery’s energy at the said rate? Well, for ideal capacitors, this is not going to happen. Instead, the capacitor will keep collecting energy slowly due to the leakage currents experienced in it. How much energy will be used up in this scenario has a lot to do with what is known as insulation resistance. Although many engineers side with the above view, others are of a different opinion. Some think in the case of an idea capacitor, there should not be any current leakage, hence no further energy will be sapped from the battery.
While that remains the case, real capacitors have been evidenced to have leakage current problems. And according to those engineers, the quantity of leakage currents will depend largely on a couple of factors like capacitor types, electrolytic, etc.
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