Why are solar street lights now powered by lithium batteries?

Why are solar street lights now powered by lithium batteries?

With the continuous advancement of technology, lithium batteries, as an advanced energy storage technology, are widely used in various fields. Especially in the field of solar street lights, lithium batteries are gradually replacing traditional colloidal batteries due to their unique advantages. This article will analyze the advantages and disadvantages of lithium batteries in order to better understand the characteristics and application scenarios of this battery technology.
1、 Advantages of lithium batteries
1. Higher average voltage

The single cell voltage of lithium batteries is 3.7V, which has a higher average voltage compared to the traditional colloidal battery's 12V. This means that lithium batteries can provide higher energy density at the same level of charge. Therefore, lithium batteries of the same size have higher energy storage capacity than colloidal batteries.

2. Higher discharge depth

The discharge depth of lithium batteries can reach over 80%, which means that during the discharge process, lithium batteries can maintain a higher level of charge for a longer period of time. This enables lithium batteries to provide a more stable and reliable energy supply during continuous discharge.

3. High energy density

Due to the more efficient internal chemical reactions of lithium batteries, their energy density is much higher than traditional colloidal batteries. This means that under the same weight, lithium batteries can store more electrical energy, making them an ideal choice for lightweight and high-performance applications.

4. Faster charging speed

Lithium batteries have a fast charging speed and can be charged with high current, greatly reducing the charging time. This makes lithium batteries significantly advantageous in applications that require fast charging, such as electric vehicles and drones.

5. Easy installation

Compared to traditional colloidal batteries, the installation of lithium batteries is simpler and more convenient. Due to its compact size and lightweight design, there is no need to dig pits to bury batteries, saving installation time and costs. In addition, the modular design of lithium batteries also facilitates later maintenance and replacement.

6. Environmental friendliness

Lithium batteries can be recycled and reused at the end of their service life, and there is less waste generated during the production process, resulting in a relatively small impact on the environment. Therefore, using lithium batteries can help achieve sustainable development and environmental goals.

2、 Disadvantages of lithium batteries
1. Insufficient safety and stability

Although lithium batteries have many advantages, their safety and stability issues cannot be ignored. In certain situations, such as overcharging or discharging, high temperature environments, etc., lithium batteries may experience safety issues such as combustion or explosion. Therefore, corresponding safety measures need to be taken during use, such as using protective circuits, avoiding overcharging and overdischarging, etc.

2. High cost

Due to the complex manufacturing process of lithium batteries, their cost is relatively high. Especially compared to traditional colloidal batteries, the cost of lithium batteries is higher. This may make the use of lithium batteries less cost-effective in some low-cost applications.

3. Poor low-temperature resistance

The low temperature resistance of lithium batteries is poor. When the temperature is below 0 ℃, their performance will be affected and their discharge capacity will decrease. In low-temperature areas of the north, especially in winter, lithium batteries may experience performance degradation or even damage. Therefore, special attention should be paid to the limitations of low temperature resistance when using lithium batteries in northern regions.

4. Limited lifecycle

Although lithium batteries have a high energy density, their lifespan is limited. As the number of charge and discharge cycles increases, the performance of lithium batteries will gradually decline, ultimately leading to the end of battery life. Therefore, for long-term use or frequent charging and discharging applications, it is necessary to regularly replace lithium batteries to ensure their performance and safety.

In summary, Solar Street Light Battery have many advantages, such as high energy density, high average voltage, fast charging, and environmental friendliness, making them significantly advantageous in high-performance, lightweight, and environmentally friendly applications such as solar street lights. However, lithium batteries also have some drawbacks, such as safety and stability issues, high cost, poor low-temperature resistance, and limited lifespan. Therefore, in practical applications, it is necessary to choose whether to use lithium batteries based on specific needs and scenarios. At the same time, addressing the drawbacks and limitations of lithium batteries