How to choose a battery for a small wind turbine?

What do input and output refer to?

Answer:

Output refers to the output power of the wind turbine: Watts, which is W,

Input refers to the input power for charging the battery: VA That is W,

How are the above data calculated?

For example, if a 100W wind turbine is equipped with a 120Ah battery (2 pieces of 60Ah),

can I use one 120Ah battery, or three 40Ah batteries? ?

Answer:

You may not know much about batteries.

You only pay attention to the capacity of the battery,

not to the voltage of the battery. .

The voltage of a single lead-acid battery is 2V,

The voltage of a single lithium battery is 3.6V,

The voltage of a single nickel metal hydride, nickel iron, and nickel cadmium battery The voltage is 1.2V.

For example, a 100W wind turbine is matched with a 120Ah battery (60Ah 2 pieces),

Here,

60Ah predicts that you are referring to a 60Ah*12V lead-acid battery ,

The 60Ah*12V lead-acid battery is composed of six 2V lead-acid batteries connected in series,

then a 60Ah2 block can be composed of:

1. 120Ah*12V lead-acid battery;

2. 60Ah*24V lead-acid battery

I predict it should be point 2, that is, 60Ah*24V lead-acid battery,

And the 120Ah battery you mentioned is wrong!

If you are wrong about the 120Ah battery,

then you cannot use a 120Ah battery,

nor can you use a 40Ah battery. Three batteries!

And if what you said about the 120Ah battery is correct,

then you can use a 120Ah battery, or you can use a 40Ah battery. Three pieces!

The above involves the problem of series and parallel connection of batteries.

Series connection increases the battery voltage but the capacity remains unchanged.

Parallel connection increases the battery capacity but the voltage remains unchanged. .

There are usually three types of lead-acid batteries for electric vehicles: 24V, 36V and 48V.

After you understand the principles of battery series and parallel connection,

I will answer your question "Who can help me with the calculation process of the above selection"

Calculation and comparison,

For your wrong

"750W wind turbine matched with 240Ah battery (120Ah 3 pieces)"

Modify to:

The 750W wind turbine is matched with 360Ah batteries (120Ah 3 pieces)

And

"750W wind turbineMatching 360Ah batteries (120Ah 3 pieces)"

It may also be wrong, modified to:

750W wind turbine matches 120Ah*36V batteries (120Ah 3 pieces),

After other similar errors have been corrected,

According to the fact that the input is greater than the output, the output is less than the input and the calculation is as follows:

Output: less than input:

100W wind power generation The machine is matched with a 60Ah*24V battery (60Ah2 pieces);

100W is less than 24V*12A=288W

The 200W wind turbine is matched with a 60Ah*24V battery (60Ah2 pieces);

200W is less than 24V*12A=288W

200W wind turbine is matched with 90Ah*24V battery (90Ah 2 pieces);

200W is less than 24V*18A=432W

300W is less than 24V*24A=576W

750W wind turbine is matched with 120Ah*36V battery (120Ah 3 pieces) ;

750W is less than 36V*24A=864W

1000W wind turbine matches 120Ah*48V battery (120Ah 4 pieces)

1000W is less than 48V*24A=1152W.

Note: The above current is the data obtained by dividing the capacity by 5.

About the purchase of wind turbines

This kind of household use. It is best for the off-grid type to provide the electricity load, electricity consumption time, the number of days of use on rainy days, and which city the house is in. Only with these parameters can things be more accurate.

The price is available upstairs, using 12V batteries and 2 2000w inverters. The price of amorphous and polycrystalline solar cells is now about the same, about 5 yuan per watt. About. Now some batteries are integrated into the inverter

How big is the wind power battery?

Unstable wind is a common phenomenon, it is best to add a set of batteries The system is designed as a wind charging and battery power supply system to solve the problem of instability. The power generation is generally 150W, 200W, 300W, 500W, etc., not 12V, 24V, 48V, which depends on the output voltage specification. The total power of the light bulb is used to calculate how many watts of generator are needed.Depending on the power voltage of the bulb, determine whether it is 12V or 48V. If it is designed to be directly powered by the battery, first look at the working voltage of the TV. For LED TVs, 12V power supply is the best. Then, your generator should be equipped with a power of about 200W, a 24V wind motor, a 12-24V wind charger, and a set of 65A/H, 12V batteries. In this way, the TV is powered directly by the 12V battery. For 6-70 light bulbs, it is best to use LED high-brightness light-emitting diodes, which are both power-saving and safe. Four of them are connected in series (to form a light bulb unit), which is about one watt. When calculated as 1W, 100 "bulbs" can be installed. . Then, all the light bulbs are connected in parallel and connected to the battery. They are also directly powered by the battery at 12V, which is the most efficient. When there is wind, the battery is charged first, or it can be powered at the same time. When there is no wind, the battery is powered to ensure the continuity of power consumption. The rated wind speed of 10M/S refers to the wind force of 10 meters per second to reach the rated power. Therefore, the generator can be either 24V or 48V, but the charger must be matched. Choosing a higher voltage is to prevent weak winds that are lower than the rated wind speed, because the wind may be strong and weak in bursts. Choosing a wind motor with a slightly higher voltage is conducive to charging.

4 12V200AH.

Wind power generation batteries are configured according to the standard configuration of 5 kilowatt hours of electricity per day. The batteries require four 12V200AH batteries, an inverter of 2000W, and a wind turbine of 2000W. Since the home does not have access to the power grid, it can only use an off-grid power generation system. To use an off-grid system, you need to first match the original energy storage component - the battery. According to the household electricity load of 3.5kwh per day.

In small wind power generation equipment, the battery is one of the important auxiliary equipment. Batteries play an important role in storing electrical energy and stabilizing voltage in DC power supply systems.