The solar street light is a lighting device that uses solar energy to generate electricity and store electrical energy. It converts solar energy into electrical energy using solar panels and stores electrical energy in lithium batteries for night lighting. According to the information provided, the solar street light has a power of 200 watts and is equipped with a 15,000 mAh lithium battery. Now let's analyze whether this configuration is enough to keep the solar street light bright all night.
First of all, we need to understand the relationship between solar street lights power and battery capacity. Power refers to the energy consumed or generated per unit time, while battery capacity refers to the electrical energy that the battery can store. In this case, the solar street light has a power of 200 watts and a battery capacity of 15,000 mAh.
Secondly, we need to consider the working time of solar street lights. Generally speaking, solar street lights need to work continuously at night, so we need to determine the working time in one night. In general, the duration of night work is around 10 hours.
Then we can calculate the energy consumption of solar street lights in one night. According to the ratio of power and working time, the energy consumption of solar street lights in one night is 200 watts * 10 hours = 2,000 watt hours.
Next, we need to determine the energy storage of the lithium battery. Lithium battery capacity is measured in milliamp-hours, while energy is measured in watt-hours. In order to convert the capacity of a lithium battery into energy, we need to convert its capacity to watt hours. Since 1 watt hour equals 1,000 milliamps, 15,000 milliamps correspondsndent to 15 watt hours.
Finally, we can compare the energy consumption of solar street lights and the energy storage of lithium batteries. According to the calculation results, the energy consumption of solar street lights in one night is 2,000 watt hours, while the energy storage of lithium batteries is 15 watt hours. It is found that the energy storage of lithium batteries is far from sufficient to support the work of solar street lights for one night.
In summary, according to the information provided, a 200 watt solar street light equipped with a 15,000 mAh lithium battery cannot light up all night. To ensure that solar street lights can continue to work all night, we need to increase the capacity of lithium batteries or use more efficient solar panels to provide more energy.
The battery can be used for a long time, so startt electricity stored?
Mechanism of action
Lithium-ion batteries use carbon materials as the negative electrode and lithium-containing compounds as the positive electrode. There is no metallic lithium, only lithium ions. , which are lithium-ion batteries. Lithium-ion battery refers to the general term for batteries using lithium-ion intercalation compounds as positive electrode materials. The charging and discharging process of lithium-ion batteries is the process of intercalation and deintercalation of lithium ions. During the process of intercalation and deintercalation of lithium ions, it is also accompanied by the incorporation and deintercalation of electrons equivalent to lithium ions (it is customary to express the positive electrode as insertion or deintercalation, and the negative electrode by insertion or deintercalation). During the charging process anddischarge, lithium ions are intercalated/deintercalated and inserted/deintercalated between the positive and negative electrodes, which is vividly called "rocking chair battery".
When the battery is charged, lithium ions are generated on the positive electrode of the battery and the generated lithium ions move to the negative electrode via the electrolyte. The carbon used as a negative electrode has a layered structure with numerous micropores. The lithium ions that reach the negative electrode are integrated into the micropores of the carbon layer. The more lithium ions, the higher the charging capacity. Similarly, when the battery is discharged (that is, the process in which we use the battery), the lithium ions embedded in the carbon layer of the negative electrode are released and return to the positive electrode. The more lithium ions returned to the positive electrode, the higher the discharge capacity.vee.
Generally, the charging current of lithium batteries is set between 0.2 C and 1 C. The higher the current, the faster the charging and the hotter the battery. Additionally, charging with too much current will not fully fill the capacity because the electrochemical reaction inside the battery takes time. Just like pouring beer, if you pour it too quickly it will produce foam and make it unsatisfactory.
Precautions for use (discharge)
For batteries, the normal use is the discharge process. There are several points to note when discharging lithium batteries:
First, the discharge current should not be too large. Excessive current will cause internal heating of the battery and may cause permanent damage. On mobile phones this is no problem and can be ignored.
As the right picture shows, the higher the die currentbattery charge is high, the lower the discharge capacity, the faster the voltage drops.
Second, you should not overload! The internal storage of electrical energy in lithium batteries is achieved by a reversible chemical change in electrochemistry. Excessive discharge will cause an irreversible reaction of this chemical change. Therefore, lithium batteries are more afraid of over-discharge once the discharge voltage is lower. exceeds 2.7V, it may cause the battery to be discarded. Fortunately, cell phone batteries have built-in protection circuits. The protection circuit will come into effect and stop discharging before the voltage is low enough to damage the battery.
There is no way to store alternating current, so electricity production and consumption occur at the same timetime. The electricity we use in our homes is usually alternating current, which means that the generator is still producing electricity while we are using electricity. Rechargeable cells and batteries primarily convert electrical energy into other forms of energy to conserve electricity. Because society is changing faster and faster and many household appliances are becoming more and more advanced, so electricity is very important for everyone.
If there is no electricity, many electrical appliances will not be able to operate normally and our lives will be in difficulty, especially when it is cold in summer and winter. If there is no electricity, there will be some. There will be no way to use air conditioners and other heating equipment, making it difficult for people to live comfortably. Many people are curious when using electricity, how these maDo gasins stock it? If the generator one day runs out of electricity, how will we live?
The most commonly used electricity in our lives is alternating current, solar energy, batteries, etc. Alternating current is the most commonly used current in our daily lives. The electrical appliances we use in our homes, as well as all kinds of everyday electricity, are essentially alternating current. There is no way to store AC power. It is usually generated by power plants and then transmitted. Transformed and transported to residential areas, allowing everyone to use electricity normally. The electricity in the battery can be stored, but the storage method is not to store the electricity directly in the battery.
Instead, the electricity is converted into other energy and stored in the battery. When she isused, voltage is generated by the intersection of the electrodes to generate electricity. There is no way to store solar energy. Solar power typically uses an energy version to convert solar heat into electrical energy and then stores it in batteries. Therefore, the battery can be used for a long time because the electricity is stored by other means and then converted into electrical energy when used, so it can be used for a very long time.