If the positive terminal of 12 volt battery is connected to the +6 volt and the negative terminal is connected to the -6 volt supply, Does it leaves any side effect on the battery? if yes please discuss the effect.
As DC system have two types of configuration?
1. unipolar: two wire system (Positive pole and neutral pole)
2. Biploar configuration: three wire system (Positive, neutral and negative pole)
for example if we have a 12 volt unipolar (+12 volat, 0 volt) and biploar (+6 volt, 0 volt, -6 volt). if the load is connected to the (+6 volt and -6 volt ) the potential difference these two will be 12 volt same line 12 volt uniploar system.
So my query is that, if the load is 12 volt battery and this connected across the positive pole and negative pole of unipolar (+6volt, 0 volt, -6 volt) system. then what will be the side effect on the battery
The theoretical case: there is no negative effect. It is only the voltage difference between the terminal that counts - not the voltage with reference to ground (as ground is not connected to the battery).
The practical case: depending on the battery type, 12 Volt may not be enough to keep the battery fully charged.
Regards
A very original question, Rajeev... It would be interesting for me to know how you got the idea for such a bizarre connection...
Well, you have connected a 12V battery in parallel to another 12V (6V + 6V) battery. Generally speaking, it is not a good idea to connect voltage sources in parallel since practically they can not have exactly equal voltages. As a result, when there is even a small difference between their voltages, equalizing currents will flow between them.
Such a difference can be result of connecting various loads (like your DC motor) to any of these sources. Depending on these loads and the particular battery characteristic, all sorts of currents with various directions will flow...
It would be a good mental excercise to imagine where currents will flow. Here is an initial picture...
By establishing a 0 V level, you have established a ground. The battery will be happy across the -6 v, +6V connections unless you have inadvertently established a second ground in the battery, e;g. via a metal case.
On a different topic I sent you a question via your gmail account. I hope you can respond soon.
Polarity is with reference to ground/earth obtained, as two 6volt power supply are used to get +6v and -6v by connecting zero volt of one, with +6 volt, of another to +6V, obtained -6v from zero of the second one, and total obtained difference would be 12V. Could be used to charged 12V battery with proper pre cossion with in current range.
Normally batteries are connected in parallel to increase current capacity.
Dear Dr. Rajeev Kumar Chauhan
Have a nice time and good day
Before we know the effect of connecting these two batteries? Let us ask what are the aims and benefits of such connection?
About the connection itself I thinks that the effect depends strongly on the load resistance, the batteries themself and the current directions.
Dear Dr. Ahmed Saeed Hassanien,
I am design a Autonomous DC microgrid for home. The microgrid consists of Photovoltaic (PV ) plant. Most of the load are 24 volt. So I want to connect the batter with the 24 volt DC bus of the micrgrid without using any DC-DC converter.
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