As an expert in electrical engineering, I can provide you with a detailed explanation of what happens when you put two batteries in parallel.

When you connect two batteries in parallel, you are essentially connecting their positive terminals together and their negative terminals together. This configuration has several implications on the electrical characteristics of the combined batteries:


1. Voltage Remains Constant: The voltage across the terminals of the combined batteries remains the same as the voltage of either individual battery. This is because the voltage of a battery is a characteristic of the chemical reactions occurring within it, and connecting batteries in parallel does not alter these reactions.


2. Capacity Increases: The capacity of a battery, often measured in ampere-hours (Ah), refers to the amount of electrical charge it can deliver over time. When two batteries are connected in parallel, their capacities add up. This means that the combined system can deliver the same current for a longer period of time compared to a single battery.


3. Current Sharing: In a parallel configuration, the current drawn from the system is shared between the batteries. Each battery will contribute to the total current based on its internal resistance and the voltage across its terminals. If the batteries are identical, they will share the load equally.


4. Protection Against Failure: Using batteries in parallel can provide a level of redundancy. If one battery fails, the other can continue to supply power, albeit at a reduced capacity.


5. Efficiency: The efficiency of the system can be improved by using parallel connections, as it allows for a higher total capacity without increasing the voltage. This can be particularly useful in applications where a constant voltage is required, but a higher capacity is needed to meet the power demands.


6. Heat Dissipation: Since the load is shared between the batteries, the heat generated by each battery is reduced, which can help in maintaining a cooler operating temperature and potentially extending the life of the batteries.

7.
Maintenance: It is important to ensure that the batteries are matched in terms of their chemistry, capacity, and age. Mismatched batteries can lead to uneven load sharing, which can cause one battery to degrade faster than the other.

Now, let's address the reference content provided. The statement that "When you connect two identical batteries in parallel, you double the output capacity while keep the output voltage the same as either battery" is correct. However, the second part of the statement regarding series connection is not directly related to the question about parallel connection and should be considered separately.

To summarize, connecting two batteries in parallel is a way to increase the capacity of the power source without changing the voltage. This can be beneficial in applications requiring a longer runtime at a constant voltage. Proper selection and matching of batteries are crucial to ensure optimal performance and longevity.

read more >>

When you connect two identical batteries in parallel, you double the output capacity while keep the output voltage the same as either battery. In the other case, if two identical batteries are connected in series, the output voltage is doubled but the output capacity is kept the same as either battery.read more >>