Battery Compensation of Solar Streetlight

Solar streetlights are widely used in roads, parking lots, parks, highways, and other places due to their environmental protection characteristics. Solar streetlights are mainly composed of solar panels, batteries, light sources, controllers, and other components. Solar streetlights are installed outdoors and often encounter bad weather such as rain, snow and hail, the adaptability of solar modules to outdoor environments is particularly important. Common solar streetlight batteries include lead-acid/gel batteries and lithium batteries. At room temperature (about 25°), when the ambient temperature drops by 1 degree or rises by 1 degree, the pressure difference of every 2V battery will reach about 0.002-0.003V. Especially in winter and summer, the outdoor ambient temperature in many areas is as low as minus 30 degrees and the highest is 50 degrees above zero. In this situation, the corresponding voltage compensation for the temperature change of the solar street lamp battery is called "temperature compensation".

It is very necessary to compensate the temperature of the solar street lamp battery. If the battery is not temperature compensated, for example, the charging capacity of the battery in winter may only reach about 80% of the normal temperature, or even lower, which will inevitably make the battery discharge and become less effective. In terms of battery selection, it is best to choose lithium batteries rather than gel batteries. Lithium batteries have better performance in terms of cold resistance and heat resistance. If the battery is buried in the ground, it should be buried a little deeper, at least 45 cm. On the one hand, it can reduce the influence of temperature, on the other hand, it can also prevent flooding and prevent water from affecting the battery.

Many solar streetlight controllers are designed with temperature compensation functions. There is a temperature sensor probe inside the controller, the purpose is to realize the voltage compensation for the solar street lamp battery in real time after sensing the temperature of the environment. The controller will sense the surrounding ambient temperature, too. When the battery and the controller are put together, the compensated voltage is accurate, but there are very few solar street lamp controllers and the battery put together in the engineering construction. For integrated solar street light, the controller is integrated in the light pole. In order to better guard against theft and prevent excessive temperature changes, most of the batteries are buried in the ground. In this way, the ambient temperature of the solar street light controller and the ambient temperature of the battery may be inaccurate. Of course, the compensated voltage value is also a wrong compensation, which will cause the solar streetlight battery to be overcharged or over discharged, thereby reducing the lifespan of the battery. It is necessary to consider thoroughly before construction. First, determine whether the solar street light controller has temperature compensation. If you plan to place the controller separately from the battery, you must customize a controller with a temperature sensing line. In this way, even if the controller is separated from the battery, the controller can detect the real-time ambient temperature of the battery through the temperature sensing line and give the most accurate voltage compensation.

To provide best service for the customers, as the best solar street lamp manufacturer in China, the solar streetlights produced by EXC are equipped with temperature sensor. If you still have doubts about the rechargeable battery temperature compensation, feel free to contact us.