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In photovoltaic power generation systems, especially photovoltaic lighting systems, the battery is in a deep discharge cycle every day. Usually, the depth of discharge is 25% to 35% every day and night. It is very important to detect and control the battery to avoid over-discharging. The discharge characteristic curve of lead-acid battery is shown in […]
In the photovoltaic power generation system, the input of electric energy generated by solar energy is not stable, so the control of the photovoltaic system brings uncertainty. In addition, the various components of the system also change with the environment and use time, so reasonable charging control to reduce the damage to the battery has […]
In the independent solar photovoltaic lighting system, the control system defines and controls the charging and discharging conditions of the battery, and controls the power output of the solar cell components and the battery to the load according to the power demand of the load, which is the core control part of the entire system. […]
Valve regulated lead acid battery (VRLA battery for short) was born in the 1970s. Although this battery is also a lead-acid battery, it has many advantages compared with the original lead-acid battery, and is popular with users, especially for users who need to install battery supporting equipment together (or a workshop), such as UPS, telecommunications […]
After understanding the charging and discharging characteristics of battery, how to control the charging and discharging process is the key to the application of battery in photovoltaic power generation system. In 1967, American scientist J.A. MAS made a lot of experimental research on the gas evolution problem in the charging process of lead-acid batteries, and […]
1. The development of lead-acid batteriesThe lead-acid battery was invented by Plante in 1859 and has a history of more than 100 years. Since its invention, lead-acid batteries have always had an absolute advantage in chemical power sources. This is because of its low price, easy availability of raw materials, sufficient reliability in use, suitable […]
In photovoltaic systems, especially stand-alone photovoltaic systems, it is very important to choose a suitable battery. When choosing a battery, power, weight and quality are mainly considered, so the battery is required to be small in size, high in energy density, light in weight, durable and cost-effective. At present, the types of batteries used in […]
Supercapacitors are also called electrochemical capacitors. Its performance is between ordinary capacitors and batteries. It has excellent pulse charge and discharge performance and high-power energy storage performance. Because of its large stored energy, light weight, and multiple charge and discharge A new type of energy storage device. At present, there are many kinds of super […]
A fuel cell is an energy conversion device that directly converts the chemical energy of the supplied fuel into electrical energy through an electrode reaction. It is a power generation device that can continuously obtain electricity by continuously supplying fuel. The biggest feature of this device is that since the reaction process does not involve […]
Lithium batteries are batteries that use lithium metal as the anode. Because lithium metal has lower mass density, higher specific power and higher electrode potential, lithium batteries have higher energy density. Lithium batteries are divided into primary lithium batteries and secondary lithium batteries. The primary lithium battery uses lithium metal as the anode and MnO2 […]