SigmasTek batteries in parallel and series

　　The main difference between parallel connection and series connection of SigmasTek batteries is the difference in voltage and capacity. Take a lithium battery with a voltage of 3.7V and a capacity of 3000mAh, which is also two batteries. If it is two strings, the model of the battery pack is 7.4V/3000mAh. If it is two strings, the model becomes 3.7V/6000mAh. When connected in series, the voltage increases while the capacity remains unchanged, while when connected in parallel, the capacity increases while the voltage remains unchanged. However, the batteries we often use are all in series and parallel, such as three series and four parallel batteries. I hope I can help you.

　　The parallel voltage of the Sigma Tek battery remains unchanged, which can increase the power supply current

　　Series connection of Sigma Tek batteries can increase the supply voltage, and the current is not

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

　　2. Series connection: Connect the positive electrode of the dry battery to the negative electrode of the battery, and then connect it in sequence. This is called series connection.

　　The advantage of series connection is that it multiplies the voltage (V) of the power supply and is generally used to drive appliances with a higher rated voltage.

　　3. Parallel connection: Generally, the voltage of the battery is the rated voltage of the relevant electrical appliance, and the parallel connection of the battery is used for power supply. Under the condition that the voltage remains unchanged, the current at the rated voltage can be increased to better drive the electrical appliance.

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

　　Under the same voltage, using batteries in parallel will increase the usage time, while batteries in series are used to improve the battery voltage to match the voltage of the appliance. If the voltage is low, the appliance cannot be started

　　Difference between series connection and parallel connection of dry batteries:

　　1. When dry batteries are connected in series, because each dry battery has an electromotive force and internal resistance, the advantages of connecting dry batteries in series are: it can provide a higher voltage; The disadvantage is that its internal resistance is large, which affects the power and current provided by it.

　　2. After parallel connection of dry batteries, because parallel connection can reduce the internal resistance of the battery pack, it can provide greater current and power; The disadvantage is that the voltage it provides is only equivalent to the voltage of a dry battery.

　　3. Hybrid connection of dry batteries: A battery set that connects dry batteries in series or in parallel is called a hybrid connection. This can solve problems that cannot be solved by using only series and parallel connections. Parallel connection: Several batteries, positive and positive, negative and negative, are connected side by side, with the voltage unchanged, the capacity increased, and the corresponding current increased. Series connection: Several batteries are connected in series, i.e., positive and negative. The negative end of the first battery is connected to the positive end of the second battery, and so on. As the voltage increases, the capacity remains unchanged. In other words, if connected in series, the electromotive force is the sum of the electromotive forces of two batteries. If connected in parallel, the voltage they provide to the consumer 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 knowledge, which is difficult, so I need to work hard! I wish the landlord success in his studies!

　　The internal resistance of the battery should be considered, and the output voltage should be between the two

　　I don't know if you are in junior high school or senior high school, but generally you don't require it. For senior high school students, try my explanation below:

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

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