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release time:2023-03-17
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In the lithium battery pack, multiple lithium batteries are connected in series to obtain the required work voltage. If you need a higher capacity and larger current, you should connect lithium batteries in parallel. There are also some battery packs that combine the two methods of tandem and parallel. The battery of a laptop may connect the four 3.6V lithium -ion batteries in the four sections, and the total voltage reaches 14.4V; then, the battery that connects the two groups together in parallel. Menho was raised to 4000 mAh. This kind of connection is called "four strings and two", which means: the two groups connect the battery pack between the two batteries together in parallel. The nominal voltage of the lithium -ion battery is 3.6V. The rated voltage of lithium ion polymer and other types of lithium batteries is generally 3.7V. If you want to get an uncommon voltage like 11.1V, you have to connect three batteries together. Candidate requires high -electricity portable equipment, which is generally powered by two or more battery packs connected in series or more batteries. Another problem brought by using a high voltage battery pack is that a battery failure in the battery pack may be invalidated. This is like a chain. The more batteries connected together, the higher the chance of this situation. As long as there is a problem with a battery, its voltage will be reduced. In the end, a "disconnected" battery may interrupt the current transport. And it is not easy to replace the "bad" battery, because the new and old batteries are not matched with each other. Generally speaking, the capacity of the new battery is much higher than the old battery. As the working voltage decreases, it has reached the critical point of the end of discharge faster than the normal battery pack. At the same time, its use time has also been shortened. Once the equipment is cut off due to the low voltage, the battery that is still intact for the remaining single batteries cannot send out the stored power. At this time, the bad battery battery also shows a large internal resistance. If there is a load at this time, then the output voltage of the entire battery chain will decrease significantly. In a set of series of batteries, a battery with poor performance is like a plug blocked by the water pipe, which will generate huge resistance and prevent the current from flowing. Other batteries will also be short -circuited, which will reduce the voltage of the terminal to 3.6V, or to disconnect the battery group link and cut off the current. The performance of a battery pack depends on the performance of the worst battery in the battery pack.
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