The difference between batteries in parallel and series

The difference between battery parallel and series is mainly the difference in voltage and capacity. Take the voltage of 3.7V, the capacity is 3000mAh lithium battery, the same is two batteries, if it is two strings, then the battery model is: 7.4V /3000mAh, if it is two, the model will become: 3.7V/6000mAh. When connected in series, the voltage will increase and the capacity will not change. When connected in parallel, the capacity will increase and the voltage will not change. But the batteries we often use are all connected in series and parallel, such as: three strings and four. I hope I can help you.

The battery parallel voltage does not change, which can increase the supply current.

The battery can be connected in series to increase the supply voltage, and the current is not

1, dry batteries are widely used in life, series and parallel are common connections.

2. In series: connect the positive electrode of the dry battery to the negative pole of the battery, and then connect it in series.

The advantage of series connection is that the voltage (V) of the power supply is multiplied, which is generally used to drive electric appliances with a large rated voltage.

3. Parallel: The voltage of the general battery is the rated voltage of the relevant electrical appliances. The parallel energy supply of the battery is used. Under the condition of ensuring the constant voltage, the current under the rated voltage can be increased to better drive the electrical appliance.

4. Summary: According to the different needs of different electrical appliances, the series and parallel use of batteries can bring unexpected results.

In the case of the same voltage, using the battery in parallel will increase the use time, and the battery is connected in series to increase the battery voltage to match the voltage of the appliance. If the voltage is low, the appliance cannot be started.

The difference between dry battery series and parallel:

1. When the dry battery is connected in series, since each dry battery has electromotive force and internal resistance, the advantage of the dry battery after series connection is that it can provide a higher voltage; the disadvantage is that the internal resistance is large, so that the power and current supplied by it are affected.

2. After the dry batteries are connected in parallel, the parallel resistance of the battery pack can reduce the internal resistance of the battery pack, so that a larger current and power can be provided; the disadvantage is that the voltage supplied is only equivalent to the voltage of one dry battery.

3. Hybridization of dry batteries: The battery packs in which the dry batteries are connected in series and partially connected in parallel are called hybrid. This solves the problem that cannot be solved when only series and parallel are used. Parallel: Several batteries, positive and negative, negative and negative are connected side by side, the voltage is constant, the capacity increases, and the corresponding current also increases. Tandem: Several battery heads are stringed together with positive and negative, the first section is negatively connected to the second section, and so on. The voltage increases and the capacity does not change. That is to say, if they are connected in series, the electromotive force is the sum of the electromotive forces of the two batteries. If they are connected in parallel, the voltage they provide to the electrical appliances is as large as the electromotive force of only one battery. I hope my answer can help you! I am also learning this part of the knowledge, it is difficult. We must work hard! I wish the landlord academic success!

To consider the internal resistance of the battery, the output voltage is between the two.

I don't know if you are junior high school or high school. Generally, you don't ask for it. If you are in high school, try to read my explanation below:

For the sake of simplicity, first discuss two batteries, the voltage of the electromotive force E1 output U=E2-Ir2=(E1r2-E2r1)/(r1+r2)

Cells in parallel and in series differences have mainly differences in voltage and capacity, took voltage is 3.7V, the capacity is 3000mAh lithium battery, two batteries also, if two strings, and that the battery model is: 7.4V /3000mAh, if it is two, the model will become: 3.7V/6000mAh. When connected in series, the voltage will increase and the capacity will not change. When connected in parallel, the capacity will increase and the voltage will not change. But the batteries we often use are all connected in series and parallel, such as: three strings and four. I hope I can help you.