How does solar street lamp use accumulator to choose and maintain?

<p>With the increasingly mature new energy technology, the country vigorously promote energy conservation and emission reduction, the application of <a href="https://www.srssolargroup.com/solar-street-light" rel="noopener noreferrer" target="_blank"><strong><a href="https://www.srssolargroup.com/solar-street-light" target="_blank">solar street lamp</a></strong></a> system is more and more extensive, so as a core of its system accessories, solar street battery how to choose?</p><p><br></p><p>At present, there are mainly lead-acid battery, colloid battery, ternary lithium battery and iron phosphate lithium battery used in the market.</p><p><br></p><p>1, lead acid battery: lead acid battery plate is composed of lead and lead oxide, electrolyte is an aqueous solution of sulfuric acid. The main advantage of lead-acid battery is that the voltage is relatively stable, the price is cheaper, the safety is high; The disadvantage is that lead-acid battery has a relatively short service life and a much larger volume than ordinary batteries. However, due to its price advantage, it still occupies a dominant position in the use of solar street lamp industry.</p><p><br></p><p>2, colloidal battery: it is equivalent to the upgraded version of lead-acid battery, maintenance free less maintenance, mainly internal colloidal electrolyte instead of sulfuric acid electrolyte, in the storage, discharge, safety performance and life have been improved; In addition, the full name of its temperature with a wider range, colloidal battery can be used in the temperature range of -40℃ -- 65℃, low temperature performance is better, in the northern alpine regions or higher temperature tropical regions, colloidal battery is the best choice; Its seismic performance is also very good, can safely use in a variety of harsh conditions, the service life of ordinary lead-acid battery is twice or even more.</p><p><br></p><p>3, ternary lithium battery: ternary lithium battery has many advantages, it is higher than the energy, small size, fast charging, high price. The number of its deep cycle is about 500-800 times, the life of the colloidal battery is about the same, the temperature range of use in -15℃-45℃. However, ternary lithium battery also has disadvantages, poor safety, if the battery is not stable, or is not qualified manufacturers of ternary lithium battery, it is very likely in the process of overcharge or high temperature environment, it is possible to explode.</p><p><br></p><p>4, lithium iron phosphate battery: higher specific energy, small size, quick charging, good stability, temperature is also wide range of application, but the price is the highest of all batteries. At present, due to its cost, it has not been implemented on a large scale</p><p><br></p><p>Since most solar street lighting systems currently use lead-acid or colloid batteries, we introduce the maintenance of these two batteries:</p><p><br></p><p>1. Avoid overcharging</p><p><br></p><p>In addition to external maintenance, the battery life of solar street lights is also closely related to the accumulation of heat generated inside. If the solar battery is overcharged, the temperature inside the battery will rise step by step and thermal runaway will occur. If it is serious, it may significantly shorten the battery life, or even cause the battery to be scrapped. If we want to prevent the battery from overcharging, we should provide the charging voltage value strictly according to the manufacturer's instructions.</p><p><br></p><p>2. To prevent insufficient charging</p><p><br></p><p>In addition to preventing overcharging, solar cells also need to prevent undercharging. Undercharging may also be due to a problem with the rack system, or the voltage may be too low. Frequent undercharging leads to fewer cycles and a shorter battery life.</p><p><br></p><p>3, to prevent overrelease</p><p><br></p><p>The discharge depth of the battery is closely related to the number of charge and discharge cycles (service life) designed by the battery. Proportionately, if the discharge depth is 10%, the number of cycles is 10,000, and if the discharge depth is 70%, the number of cycles is only 500. The deeper the discharge, the fewer cycles.</p><p><br></p><p>If the discharge is serious, the life of the battery will be shorter, serious may cause the battery can not be activated to the best state, or even a sudden scrap. In order to prevent the excessive discharge of this battery, it is necessary to install a BMS system in the battery, so that the voltage of the battery can be adjusted, and the voltage and current between the batteries can be balanced, so that there will not be a case of eating and starving.</p><p><br></p><p>4. Control the ambient temperature</p><p><br></p><p>Especially high temperature environment can shorten the life of solar battery by half, so the control of solar cell temperature is very important. The service life of the battery is relatively long under normal temperature weather, if the temperature weather, the battery is very suffering. If the environment is relatively harsh, there is a very low temperature or very high temperature of the case, it is best to choose the battery when the use of temperature range of a wider range of colloidal battery.</p>