The battery is an important part of the solar LED lighting system. Usually the solar LED lighting system operates independently of the power system. The energy storage link becomes a key issue for the performance of the system. Generally, energy storage components account for 30% to 50% of the total system cost. , Its charge and discharge performance directly determines the life of the system. During the day, the battery stores the electric energy generated by the solar battery through the charger and the battery, and in the evening, the electric energy stored in the battery is used to drive the LED lighting through the discharger. In the actual solar LED lighting system, the battery is the most easily damaged and most easily consumed part. According to the needs of different systems, finding the ideal battery has become an important part of the design of solar LED lighting systems.
In solar photovoltaic systems, batteries are usually used to store the electrical energy produced by the solar cells and supply power to the load at any time. The basic unit of each battery is a battery that uses electrochemical principles to charge and discharge. Two or more batteries are combined to form batteries of different voltages and capacities. Through the oxidation-reduction reaction, electrical energy can be converted into chemical energy storage, and the energy can be released and converted into direct current electrical energy when needed. Among the commonly used batteries, the basic unit of the electrochemical cell is shown in Figure 1, and its main components are as follows.
①Positive electrode. The positive electrode of the battery has an active material, and the reduction reaction that combines electrons occurs when the battery is discharged.
②Negative pole. The active material of the negative electrode of the battery undergoes an oxidation reaction when the battery is working, giving out electrons, returning to the positive electrode through an external circuit, and transferring energy to the external circuit at the same time.
③ Electrolyte. Provide the ion conductive medium inside the battery.
④ Diaphragm. The separator can not only prevent the positive and negative active materials from directly contacting and short-circuit, but also can make the gap between the positive and negative electrodes small so that the internal resistance of the battery has a small internal resistance. Generally, the diaphragm adopts various materials with good insulation properties and corrosion resistance.
⑤Shell. The outer shell of the battery is mainly to encapsulate the components of the battery into a whole, so its material must be able to withstand the corrosion of the electrolyte, and should have a certain mechanical strength.
The internal spontaneous reaction of the battery, the process of outputting current to the external electrical equipment of the battery is called discharge; on the contrary, the external input of electric energy into the battery, forming a current opposite to the discharge current direction makes the battery internal reaction opposite to the discharge reaction, this process Called charging. When the battery is discharged, the internal active material will gradually be consumed, and the consumed part can be recovered by charging, so that the battery can be regenerated, so it is also called a rechargeable battery.
Through the above, we have a better understanding of the battery of the solar LED lighting system. If you want to know where to buy a better battery, we can recommend a company for you – Tycorun, the following is the link to his website –takomabattery.com.