Lithium Battery Series And Parallel Instructions
When we use lithium batteries for series and parallel connection, there are actually many points that need to be paid attention to. Let’s take a look today.
The basic pricinple
The first is the basic concept, about the series connection of lithium batteries, as shown in the figure below:
When in a circuit, all the positive and negative electrodes of the batteries are connected in sequence, and there is no other circulation, the simplest circuit is generally called a series circuit.The parallel circuit corresponds to the series circuit, as shown in the following picture:
You will see that the positive poles are connected together and the negative poles are also connected together, thus forming a parallel circuit.
Generally speaking, the current of the series circuit is equal, but the voltage is different, the total voltage is the sum of the voltage of each battery.
For parallel circuits, the different cicle voltages are the same, the difference is the current.
In actual use, we often encounter series and parallel connections. Here are some common precautions:
- Series connection can make the voltage higher, such as 12V, can become 24V, 36V, 48V
- Parallel connection can increase the capacity, such as two 12.8V 100Ah lithium iron phosphate battery packs, you can connect them in parallel to become 12.8V 200Ah
- If you need to connect in series and parallel, please don’t do it directly. If you are using a lithium battery, be sure to consult your battery seller, and they will tell you whether your idea is ok
- Under normal circumstances, the number of series and parallel connections is limited, and the specific manufacturers are different.
- If you need to connect batteries in parallel, be careful not to put the final total positive and negative poles on the same battery, on the contrary, they should be as far away as possible, as shown in the figure below:
How it works?
You may be confused, why should this be? If you want to explain this, you need to describe it from a deeper physics perspective. But we don’t explain it that way today, now there is a good analogy. You can imagine a battery as a person, he is lazy. If you have connected a lot of batteries in parallel, but you haven’t separated the total positive pole and the total negative pole as far as possible, a phenomenon will happen at this time, that is, you may be lazy and don’t want to finish all the batteries, so you just walk in front of you A few batteries after that will do the trick. The principle is actually that simple. If we connect the total positive and negative electrodes to the same battery when connecting many batteries in parallel, the usage rate of this battery may be significantly increased, and the usage rate of other batteries may be significantly reduced. This will bring The voltage of the battery pack system (between different batteries) is inconsistent, which will bring about various potential problems, which is obviously not what everyone wants to see.
Regarding the balance of lithium-ion batteries, we will write an article in the future blog for everyone to analyze. Due to limited space, we will stop here today, and then we will publish more tips on lithium battery selection in the follow-up Blog, please stay tuned to JustlithiumBattery©, stay tunes!
When we use lithium batteries for series and parallel connection, there are actually many points that need to be paid attention to. Let’s take a look today.
The basic pricinple
The first is the basic concept, about the series connection of lithium batteries, as shown in the figure below:
When in a circuit, all the positive and negative electrodes of the batteries are connected in sequence, and there is no other circulation, the simplest circuit is generally called a series circuit.The parallel circuit corresponds to the series circuit, as shown in the following picture:
You will see that the positive poles are connected together and the negative poles are also connected together, thus forming a parallel circuit.
Generally speaking, the current of the series circuit is equal, but the voltage is different, the total voltage is the sum of the voltage of each battery.
For parallel circuits, the different cicle voltages are the same, the difference is the current.
In actual use, we often encounter series and parallel connections. Here are some common precautions:
- Series connection can make the voltage higher, such as 12V, can become 24V, 36V, 48V
- Parallel connection can increase the capacity, such as two 12.8V 100Ah lithium iron phosphate battery packs, you can connect them in parallel to become 12.8V 200Ah
- If you need to connect in series and parallel, please don’t do it directly. If you are using a lithium battery, be sure to consult your battery seller, and they will tell you whether your idea is ok
- Under normal circumstances, the number of series and parallel connections is limited, and the specific manufacturers are different.
- If you need to connect batteries in parallel, be careful not to put the final total positive and negative poles on the same battery, on the contrary, they should be as far away as possible, as shown in the figure below:
How it works?
You may be confused, why should this be? If you want to explain this, you need to describe it from a deeper physics perspective. But we don’t explain it that way today, now there is a good analogy. You can imagine a battery as a person, he is lazy. If you have connected a lot of batteries in parallel, but you haven’t separated the total positive pole and the total negative pole as far as possible, a phenomenon will happen at this time, that is, you may be lazy and don’t want to finish all the batteries, so you just walk in front of you A few batteries after that will do the trick. The principle is actually that simple. If we connect the total positive and negative electrodes to the same battery when connecting many batteries in parallel, the usage rate of this battery may be significantly increased, and the usage rate of other batteries may be significantly reduced. This will bring The voltage of the battery pack system (between different batteries) is inconsistent, which will bring about various potential problems, which is obviously not what everyone wants to see.
Regarding the balance of lithium-ion batteries, we will write an article in the future blog for everyone to analyze. Due to limited space, we will stop here today, and then we will publish more tips on lithium battery selection in the follow-up Blog, please stay tuned to JustlithiumBattery©, stay tunes!
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