Rechargeable batteries – store electricity for use in windless hours. They also equalize and stabilize the output voltage from the generator. Thanks to them, you get a stable voltage without interruption, even in gusty winds. Your facility is powered by rechargeable batteries.
Rechargeable batteries are used as energy storage in uninterruptible power supply systems, wind turbines, solar panels. Also used to start trolling or starting boat electric motors, car starters, and gasoline boat engines.
Rechargeable batteries can differ not only in price but also in basic parameters.
The difference between the batteries in the main parameters:
- Maximum service life
- Battery capacity
- Number of recharge cycles
- Self-discharge parameters
- Overall dimensions
- Operating temperature range
- Possibility of accelerated charging
- Maximum shelf life.
Rechargeable batteries can be made in the form of one or more elements connected in series with each other in one housing. The electrolyte in the battery can be in liquid or gel form. In conventional lead-acid, the electrolyte is in a liquid state and the battery needs maintenance, electrolyte replacement, and topping up. In-gel maintenance-free, the electrolyte is thickened to a gel state. These are easy to operate, maintenance-free, and can be installed in any position.
You can buy rechargeable batteries of various types. If necessary, our experts will help you choose the right type of battery, and will carry out all installation work related to its installation and connection.
What to look for when selecting for alternative energy systems:
In Volts (B), the voltage is expressed.
The input voltage to the inverter and the output voltage from the generator must be equal to the total voltage of all connected batteries. If the output voltage from your generator is 48 volts, you need four 12-volt batteries or two 24-volt batteries.
In Ampere-hours (Ag) is the capacity of batteries.
The term of autonomous work of your object at windlessness depends on the capacity of storage batteries. The wind turbine accumulates electricity in batteries and the greater their capacity, the greater the supply of electricity in them, and the longer the battery life of your facility.
Approximate battery capacity.
If you take a 12 V-200 Ag battery, it can last for about 2 hours, at a load of 1 kW or 1 hour at a load of 2 kW. Battery 12 V-150 Ah – 1.5 hours at a load of 1 kW, or 45 minutes at a load of 2 kW. The 12 V-100 Ag rechargeable battery can last about 1 hour at a load of 1 kW, or 30 minutes at a load of 2 kW, and so on in descending order. That is, the greater the load, the less battery life.
The choice of battery for wind turbines depends on the length of the windless period. Due to the fact that it is sometimes very difficult to accurately determine the number of consecutive windless days, the wind turbine battery must be designed for more days than the battery for the FEB. The minimum should be a battery that can support the operation of wind turbines for 7 days. If financially possible, you should increase the battery to 14 days. Thanks to a more powerful battery, the wind turbine will work more efficiently and be less dependent on weather conditions.
These calculations are usually approximate, as there are factors that affect the battery life, such as the temperature of the batteries, the structure of the batteries and their brands, the mode of use of the accumulated charge, and so on. In any case, the batteries must be the same, of the same make, model, and with the same service life.
Types of rechargeable batteries
The most commonly used in mobile phones and radio are the following types of batteries:
- nickel-cadmium (Ni-Cd)
- nickel-metal hydride (Ni-MH)
- lithium-ion (Li-Ion)
- sealed lead-acid (SLA)
- lithium polymer (Li-polymer)
Different types of batteries have not only different values but also differ in basic parameters: the number of recharge cycles, the maximum storage life given to the tank, size, temperature range, the ability to accelerate charging, etc.
Batteries are made as a single element, and several sequentially included and decorated in one case elements – batteries. Some battery models include electronic controls that control the charge mode and protect the battery from improper use.
As a rule, each manufacturer uses the original production technology, and, accordingly, their own developments in the design of certain models. Nevertheless, there are several general approaches to the design of different types of batteries.
For example, a lead-acid battery usually consists of two plates (electrodes) placed in an electrolyte (aqueous solution of sulfuric acid).
In the nickel-cadmium element, the negative and positive plates are rolled together and placed in a metal cylinder. The positive plate consists of nickel hydroxide and the negative – of cadmium hydroxide.
The two plates are insulated by a separator, which is moistened with electrolyte. Nickel-metal hydride battery is structurally similar to a nickel-cadmium battery but has a different chemical composition of the electrolyte and electrodes. In a lithium-ion battery, the electrodes and the separator (separator) are placed in an electrolyte of lithium salt.
Capacity, expressed in ampere-hours (A • h, mA · h) or watt-hours (W · h), is the amount of energy a battery can put into a load in one hour.
In practice, battery capacity is usually measured by a battery analyzer. For example, a rechargeable battery with a nominal capacity of 1200 mAh. gives a load current of 1200 mA for one hour.
In theory, the energy consumption in a shorter time should be the same as in the case of a slower discharge, as the same amount of energy is given, only for a shorter time – but in practice, this is not the case, mainly due to the final internal resistance of the battery. . When discharging the battery installed in the analyzer, which allows you to adjust different discharge currents, a higher energy will be given if the battery is discharged with a lower current.