Batteries Configuration. Series or Parallel?
Basic Electrical Engineering Interview Question and Answers Series:
Batteries configuration. Are these two batteries connected in series or parallel? and how to connect load to this type of batteries connection.
Short Answer: The batteries are connected in parallel.
If the positive (+) terminal of one battery is connected to the positive terminal of second battery and negative (-) terminal to the negative terminal, it is known as parallel connection of batteries. As shown in the above fig, the (-ve) terminal is connected to the (-ve) and (+ve) terminal to the (+ve). Hence these two batteries has been connected in parallel. The parallel connection of batteries and load connection to this kind of wiring is also shown in the following fig.
Keep in mind that the voltage at each point is same while current is additive in a parallel connection i.e.
I1 + I2 + I3 … + In
If the negative terminal of battery is connected to the positive terminal and so on, It is known as series connection of batteries. In series connection, voltage are additive while current is same at each junction and section i.e.
V1 + V2 + V3 … Vn
In case of a complex circuit i.e. both series and parallel connection in single circuit, it is known as series-parallel connection of batteries.
The following fig shows different types of batteries connection i.e. series connection, parallel connection and series-parallel connection.
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