The series and parallel storage

admin — Fri, 13 Nov 2009 00:33:13 +0000

The battery series and parallel up use, this sounds like very simple, however, follow some simple rules, can avoid unnecessary problems.
The cells of the battery are needed to connect, the working voltage. If you need a higher capacity and more current, it should be parallel. Batteries, Other cells, the series and parallel to combine these two kinds of methods. A laptop battery may be the fourth quarter 3.6 V lithium ion battery connection, total voltage reached 14.4 V, And then, the two groups together, so the battery in parallel, the total power of the battery can be from 2000 to 4000 ma ma when. This method is called “four strings up two and”, it means: the two groups of four batteries battery series in parallel.
The watch, backup storage and cellular phone in general use a battery. A quarter of the nominal voltage nickel-based battery is 1.2 V, alkaline battery is 1.5 V, silver oxide battery is 1.6 V, lead acid battery is 2V, li-ion battery is 3V, and lithium ion battery of nominal voltage is 3.6 V. Using lithium-ion polymer and other types of lithium battery, its rated voltage is generally 3.7 V. If you want to get this uncommon as 11.1 V of voltage, would get three series of the battery. Along with the development of modern microelectronics technology, we have to use a 3.6 V of lithium ion battery, cellular phone and low consumption of portable communication products. In the 1960s, illuminance meter in widely used in battery, mercury from the consideration of environmental protection, now fully to withdraw from the market.
The nominal voltage nickel-based battery for 1.2 V or 1.25 V. Between them, in addition to the market preferences, doesn’t make any difference. Most of the commercial battery, the battery voltage for each section 1.2 V, Industrial battery, the battery, the battery and military aviation each battery voltage is still 1.25 V.
tandem
The portable power to high, usually by two or more batteries battery power of the connection. If the use of high voltage battery, conductor and the size of the switch can be done very small. Moderate price industrial power tools generally use voltage for 12V to amounts of V battery power, And advanced electric tools used for 36V of voltage 24V to battery to gain greater power. Automobile industry ultimately starter ignition battery voltage from 12V (actually is 14V) to 42V 36V, even. These cells are up by 18 series lead acid battery. In the early hybrid cars, used to supply voltage, 148V battery. Compare the new models used batteries, 450V voltage up to 500V, most of the battery is nickel base. A voltage 480V for the battery is nickel metal hydrogen by 400 section nickel metal hydrogen battery series. Some hybrid cars also in lead acid battery had done a test.
42 V battery expensive cars with, and compared with the 12V batteries, it will produce more arc switch. Using high voltage battery brings another problem is the batteries are likely to encounter a battery failure. It is like a chain of battery, together, appear this kind of circumstance of higher risk. If a battery has a problem, it will reduce the voltage. Finally, a section of the battery “disconnect” could interrupt current. And to replace “bad” battery is no easy task, for new and old battery is mutually match. Generally speaking, the new battery capacity than the old battery is much higher.
We look at an example in the third quarter of the battery, the battery only 0.6 V voltage, rather than the normal 1.2 V (figure 1). With the working voltage drop, it is faster than normal cells to discharge the critical point, at the same time, the end of its use time also has shortened. Once a device for low voltage power off and the rest in quarters, still can put the battery power to send out of the store. Then, in the third quarter of batteries are still, if still contain internal, then, will load the battery voltage output chain will drop dramatically. In one group, a quarter of serial battery of battery, like a blocking pipe plug, will produce the huge resistance, prevent current flow in the past. The third section battery will short-circuit, this will make the terminal voltage drops to 3.6 V, or that link disconnect the battery and cut off the electricity. A battery performance depends on the stack the worst performance of the battery.
parallel

In order to get more power, can put two or more a battery parallel. Besides the batteries in parallel, another option is to use the size bigger batteries. Due to the limit of the battery can be chosen, this method does not apply to all cases. In addition, large size batteries are not suitable for battery needs to make the appearance of specifications. Most of the chemical battery can be used in parallel, the most suitable for lithium ion batteries used in parallel. By four batteries in parallel to keep the battery voltage, current, and 1.2 V and running time is up to four times.
Compared with the battery, the battery in parallel in the series circuit, the high impedance or “open”, but the batteries battery, will reduce load capacity in parallel, and shorten the time of operation. This is just like an engine just launched three cylinders. The damage caused by a short circuit will be bigger, because, this is, in short, when malfunction of the battery will rapidly deplete power, the other battery and fire
parallel
Using this method, the series is flexible in design, can use the standard cell size needed to achieve the rated voltage and current (figure 3). Should notice: the total power of the battery will because of different connection method and change. Power equal voltage by current.

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The series and parallel storage