The solar street light is a lighting device that uses solar energy to produce electricity. It converts solar energy into electrical energy via solar panels and then stores it in lithium batteries for nighttime lighting. According to the conditions given in the question, we need to calculate the capacity of lithium batteries required to meet the needs of solar street lights.
First, we need to calculate the total daily energy consumption of solar street lights. According to the conditions given in the question, the light source power of the solar street light is 30W and lights up for 6 hours. Therefore, the daily energy consumption is 30 W * 6 hours = 180 Wh.
Next, we need to calculate the energy consumption of solar street lights on rainy days. According to the conditions given in the question, solar street lights should stay on for 7hours on rainy days. Since there is no solar power supply on rainy days, the power supply must depend on electricity stored in lithium batteries. Let's assume that the energy consumption on rainy days is the same as on sunny days, i.e. 180 Wh per day. Therefore, the energy required on rainy days is 180 Wh * 7 hours = 1260 Wh.
In summary, the total energy consumption of solar street lights per day is 180Wh + 1260Wh = 1440Wh.
Next, we need to calculate the lithium battery capacity needed to meet the needs of the solar street lights. Generally speaking, the capacity unit of a lithium battery is ampere-hour (Ah), which is how long the battery can supply power when the current is 1A. We can calculate the required capacity of the lithium battery using the following formula:
Lithium battery capacitylithium battery (Ah) = total energy consumption (Wh) / voltage (V)
According to the question, there is no voltage check of solar street lights. Generally, the voltage of solar street lights is 12V. Therefore, we can set the voltage to 12V and substitute it into the formula to calculate:
Lithium Battery Capacity (Ah) = 1440Wh / 12V = 120Ah
Therefore, a lithium battery with a capacity of 120 Ah is required in order to meet the usage needs of solar street lights.
In summary, according to the conditions given in the question, the 30W light source of the solar street light can last 6 hours and 7 rainy days, and it should be equipped with a lithium battery with a capacity of 120Ah.
How many years does the lithium battery of solar street lights last?
Many factors affect the price of solar street lights, such as the height of the lamp. pole, yoursize of lithium battery, size of solar panel, style of lamp head and lighting time, etc. dzjnxny
The price of a 12 meter high solar street light is about 3,400,
Jiuneng 12 meter solar street light
dzjnxny solar street light
Thanks to automotive grade electric cells, the lifespan of the lithium battery of solar street lights is more than 15 years.
In recent years, lithium batteries are no longer like they were in the beginning. There are only lithium batteries at the energy storage level. The battery life at the energy storage level is only 3-8 years, like the 18650 three. yuan battery on the market.The battery cells only have 200-300 cycles, which is similar to the lifespan of lead-acid batteries, which is only 2-3 years. Energy storage level 32650 battery can last 4-5 years.
Nowadays, manyreuse car batteries are used step by step. Manufacturers of high-end, high-quality solar street lights directly use new car batteries to obtain the lithium battery life ratio of solar street lights. A good ladder battery has over 1,000 cycles and a lifespan of over 10 years.
There are also current lithium-iron batteries with good low temperature resistance, such as BYD C20 batteries, which charge and discharge 70% at -20 degrees. Our factory has been using lithium battery solar cells in Xinjiang, Inner Mongolia and Qinghai for three winters without any after-sales service.
Car lithium batteries
For more detailed analysis, please see:
What is the life cycle of solar street lights?
Learn more about solar street lighting expertise: Teacher's Lighting Classessor Li is the first free knowledge sharing platform for solar street lighting products in China