Difference Between Capacitor and Battery

Capacitor vs Battery

A battery is an electronic device that changes over chemical energy into electrical energy to give a static electrical charge to power. Though a capacitor is an electronic part that stores electrostatic energy in an electric field. Both the capacitor and battery play out a similar capacity of putting away and discharging an energy, be that as it may, there are basic contrasts among capacitor and battery in the manner they work. Albeit the two batteries and capacitors play out a similar capacity of putting away energy, the primary distinction between them lies in the manner they play out this task. Battery store and disperse energy straightly while capacitors store and circulate energy in short blasts. In this article, we will study in detail about what is the difference between capacitor and battery. Let us look at what the capacitor vs battery is. 


What is Battery

A battery is an electronic device made of at least one cells which changes over the chemical energy stuffed inside its dynamic materials into electrical energy to give a static electrical charge to power. 

Electrons are created through electrochemical reactions which include the move of electrons by means of an electronic circuit. 

In straightforward terms, the battery is a consistent wellspring of power which supplies electricity as direct current (DC). A battery, for the most part, contains a positive (+ve) and a negative (- ve) terminal. 

The cell is the essential power unit of the battery which comprises of three primary bits. In addition, there are two electrodes and a chemical called an electrolyte which fills the hole between the electrodes. 

At the point when the electrodes are associated with a circuit, the electrons cross from the negative to the positive terminal, in the long run making an electrical charge. Energy is stored inside the battery as chemical energy which gets changed over into electrical energy, discharging electricity through a chemical reaction which in the end generates an electric current.


What is Capacitor 

A capacitor (otherwise called a condenser) is likewise an electronic part that stores electrostatic energy in an electric field. 

They are progressively similar to a battery however they are utilized for totally unique reason. While a battery utilizes chemical reactions to store electrical energy and discharges power gradually through an electronic circuit, capacitors are fit for discharging energy quickly. 

A capacitor contains in any event two electrical conductors separated by an insulator (dielectric). At the point when an electric field creates over the insulator, it stops the flow and an electric charge is beginning to develop on the plates. 


Difference Between Capacitor and Battery 

  1. Meaning of Capacitor and Battery: While a battery stores its potential energy as chemical reactions before changing over it into electrical energy, capacitors store potential energy in an electric field. In contrast to a battery, a capacitor voltage is variable and is relative to the measure of electrical charge stored on the plates.

  2. Use of Capacitor and Battery: A battery can as a rule store a bigger measure of electrical charge, while a capacitor, then again, are equipped for dealing with high voltage applications and perfect for high-frequency employments. 

  3. Charge/Discharge Rate of Capacitor and Battery: The rate at which a capacitor can charge and discharge is typically quicker than what a battery is equipped for in light of the fact that a capacitor stores the electrical energy directly onto the plates. The procedure gets postponed a piece if there should arise an occurrence of a battery because of the chemical reaction included while changing over chemical energy into electrical energy. 

  4. Energy Storage of Capacitor and Battery : While both electronic devices are utilized to store electrical energy, the manner in which they do fluctuate drastically. A battery stores electrical energy as chemical energy, while a capacitor stores electrical energy in an attractive field. This is the reason batteries store a great deal of charge however they charge/discharge gradually. 

  5. The Polarity of Capacitor and Battery: The polarity of the electronic circuit must be opposite while charging a battery, while it must be same as it should be while utilizing if there should be an occurrence of a capacitor. A battery keeps up a steady voltage flow over the terminals and it is discharged just when the voltage goes down.

FAQ (Frequently Asked Questions)

1. Which is Better a Capacitor or Battery?

Capacitors have a much lower internal opposition which implies they can easily supply high currents up to several amps, yet they have two impediments, they don't create energy (you have to charge them for energy to be discharged from them) and furthermore they have low limit, even supercapacitors can just store small parts of the energy that an aa battery can store. The supercapacitor is better in certain regards to the ordinary rechargeable battery and it likewise has some genuine impediments. As the supercapacitor creates it will turn out to be far and away superior. The eventual fate of energy storage (the biggest issue for sustainable power source) likely could be comprehended by the restored advancement of the supercapacitor.

2. Why can't we Use Capacitors Instead of Batteries?

A battery's voltage remains about constant as it discharges at a constant current. Subsequently, the power output is almost constant. A capacitor's voltage drops straightly after some time at a constant current. Along these lines, power output drops directly. So as to utilize the capacitor as a battery substitution, you need a voltage guideline circuit that can step up the voltage as it drops, which implies you need a straight increment in current output to convey a constant power output.

3. Can You Use a Capacitor as a Battery?

Capacitors have a lot of more terrible energy thickness than batteries. While capacitors have improved a great deal as of late, so have batteries, and you will, in any case, need 10 – 100 fold the amount of mass and size of capacitors to store proportional energy to a battery. 

Batteries additionally have the advantage of having a generally constant output voltage as they discharge. Capacitors have an output voltage which diminishes directly all through their charge, which implies you need costly voltage managing circuitry to coordinate them to a heap.