[Explained] Battery can store AC or DC and Why?


Why battery cannot store ac, are batteries ac or dc


There is only one device using which we can store electrical energy for a long time that is Battery. Nowadays Supercapacitor also comes which can store electrical energy for a long time but less than a battery. The most economical and conventional device for storing electrical energy is Battery. There are some questions arise are batteries AC or DC, Battery can store AC or DC, and Why Battery cannot store AC.




Are Batteries AC or DC?



I have noticed, lots of people search on Google "are batteries ac or dc". Always remember that batteries are DC devices, not AC. For the power backup, we used the Inverter in our home and the inverter gives AC supply. The inverter uses the battery for storing electrical energy. So sometimes peoples confused and they said batteries are AC because inverter gives AC output.


The inverter converts AC to DC for the charging of batteries and again convert DC to AC to give AC power supply to our home appliances. So Always remember that batteries are DC devices.




A battery can store AC or DC?


As I told before the battery is a DC device so it can store DC. The battery cannot store AC.




Why battery cannot store AC?



Actually, any device does not know what is AC and what is DC they only know the electrical energy. Some devices can convert electrical energy to another energy and some devices can convert another to electrical energy. We can say AC and DC are the different forms of electrical energy.


First, know how a battery store electrical energy. A Battery store electrical energy in the form of chemical energy. When we connect the battery to the power supply for charging it converts electrical energy into chemical energy and stored it. But when we connect the battery with a load, it converts the stored chemical energy into electrical energy and delivers to the load.



During the discharge time, a chemical reaction happens inside the battery, the anode of the battery starts release electrons, this electrons flowing through the load and ultimately goes to the cathode of the battery which absorbs the electrons.

During Charging time, the applied voltage forced the electrons to release from the cathode and go to the anode. So, in this case, cathode release electrons and anode absorbs electrons.



Now we connect a battery with an AC power supply to store AC supply. AC changes their polarity according to their frequency. If it has 50Hz frequency then the polarity is changed 50 times per second. So during the positive half cycle, a positive voltage will be applied to the battery and the battery will be charged but in the negative half cycle, a reverse voltage will be applied to the battery which forces the battery discharge quickly. So the total average voltage applied to the battery will be zero and it will not be charged.

The battery can be charged by the AC supply if we interchange the terminals of the battery with changing of the polarity of AC supply which is not highly possible.


So battery has the property that electrons can flow one plate to another plate in one direction only at the same time that is why the battery cannot store AC.


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[Explained] Battery can store AC or DC and Why? [Explained] Battery can store AC or DC and Why? Reviewed by ETechnoG on 17:57 Rating: 5
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