Factors Affecting Lifespan of Solar Road Light Battery

Solar road lights are common solar products in our daily lives. There are integrated and split types, and the application scenarios are also diverse. It is often installed on both sides of roads, squares, parking lots, parks and other places. The service life of solar road lights is a problem that most people concerned. It is mainly composed of light sources, batteries, solar panels, controllers, light poles and other accessories. The battery is the most important accessory in solar road lights. Its performance directly affects the service life of the street lamp, so what factors affect the service life of the battery?

There are four main factors that affect the service life of solar road light batteries:

1. Depth of discharge

The depth of discharge has a great influence on the cycle life of the battery. If it is frequently discharged deeply, the cycle life will be shortened. According to the load power, the less the total discharge of the battery each time accounts for, the longer the lifespan of the battery will be! Generally, the service life of a product that discharges 30% of the total capacity each time is 4 to 5 years. The battery used in EXC solar road lights only accounts for less than 20% of the total discharge each time, which greatly extends the battery life cycle;

2. The rate of discharge

The discharge rate affects the terminal voltage value of the battery. The larger the discharge current, the smaller the capacity given by the battery, and the faster the voltage value drops, which will easily cause the power supply to be interrupted and the excessive consumption of active materials. Then the battery will be unable to be fully charged and the capacity to drop in the later stage. On the other hand, the discharge rate is not as low as possible. Long-term excessively low discharge rate will significantly increase the amount of lead sulfate molecules produced, which will cause stress to cause the plate to bend and the active material to fall off, which will also reduce the service life of the battery.

3. The temperature of the environment

The battery lifespan of solar road lights will decrease as the ambient temperature rises. The lifespan of batteries with poorer quality will decrease rapidly after the temperature rises, and some will be damaged even after less than a year of use. The rated capacity of the battery refers to the value of the battery at 25°C. If the battery temperature is too low, the capacity will decrease. When the ambient temperature rises, it is easy to cause the battery to overcharge, the electrolyte heats up, and the corrosion rate of the positive plate is accelerated, so that the battery is scrapped. Temperature is an important factor affecting battery performance. Therefore, when installing solar road lights, how to properly place the battery is a very important issue. Some manufacturers install the battery in a sealed battery box and then install it on the street light pole, but the installation position is higher. There are also some solar street lamp manufacturers who choose to bury the battery deep in the soil to ensure a constant temperature of 20 degrees Celsius to minimize the impact of the environment; the specific battery installation method can be constructed by a professional street lamp manufacturer according to the site conditions.

4. Charging situation

The accumulator should be charged in a timely and sufficient amount. If the battery is overcharged, its voltage will gradually rise. When it rises to a certain extent, the battery will release a large amount of gas, which will reduce the capacity of the battery.

During the day, solar panels absorb solar energy and convert it into electrical energy for storage in batteries. At night, the battery supplies power to the street lights under the command of the controller. The important role of batteries can be seen from this. If you want to buy cost-effective solar road lights, good quality batteries are essential. Lithium iron phosphate battery is the choice of most solar road light manufacturers nowadays. It has long lifespan and no pollution. Shenzhen EXC-LED Technology Co., Ltd. is a high-tech enterprise intergrating outdoor LED lighting product design, R&D, production, sale and service. The EXC solar road light adopts high performance lithium iron phosphate battery to guarantee the quality of the solar road light.