Solar power storage batteries is the application of ‘battery’ in solar photovoltaic power generation. At present, there are four kinds of lead-acid maintenance free battery, ordinary lead-acid battery, colloidal battery and alkaline nickel cadmium battery. At present, the widely used solar batteries in China are mainly lead-acid maintenance free batteries and colloidal batteries. Because of their inherent “maintenance free” characteristics and less pollution to the environment, these two types of batteries are very suitable for reliable solar power supply systems, especially unattended workstations.
The solar power storage batteries shall have the following advantages:
1.Solar energy resources are inexhaustible.
2.Green environmental protection. Photovoltaic power generation itself does not need fuel, has no carbon dioxide emission and does not pollute the air and no noise.
3.Wide range of applications. Solar power generation system can be used wherever light can be obtained. Which is not restricted by geographical, altitude and other factors.
4.No mechanical rotating parts, simple operation and maintenance, stable and reliable operation. As long as there is a solar cell in a photovoltaic system, the battery module will generate electricity. In addition, it now adopts automatic control number, which basically does not need manual operation.
5.Solar cell production materials are abundant: silicon materials are abundant, and the abundance of the earth’s crust ranks second after oxygen, up to 26%.
6.Long service life. Crystalline silicon solar cells can last up to 2035 years. In the photovoltaic power generation system, as long as the design is reasonable and the type selection is appropriate, the service life of the battery can also be as long as 10 years.
7.The solar cell module has the advantages of simple structure, small and light volume, convenient transportation and installation, and short construction cycle.
8.Easy system combination. Several solar cell modules and battery cells are combined to a solar cell array. Inverter and controller can also be integrated. The system can be large or small, which is very easy to expand.
9.The energy recovery period is short, about 0.8-3.0 years; The energy increment effect is obvious, about 8-30 times.
Working principle of solar power storage batteries
During the day, the sunlight shines on the solar module to generate a certain range of DC voltage, convert the light energy into electric energy, and then transmit it to the intelligent controller. After the overcharge protection of the intelligent controller, the electric energy transmitted from the solar module is transmitted to the battery for storage; Storage requires storage battery, which is an electrochemical equipment that stores chemical energy and releases electric energy when necessary.
Use and maintenance of solar power storage batteries
(1)Suitable working temperature: 15 ~ 20 ℃
(2)The solar power storage batteries is connected by connecting the positive pole and the positive pole, and the negative pole and the negative pole. In this way, the power of the solar power storage batteries will double, and the voltage is the same as that of batteries. The two poles shall not be short circuited (bumped).
(3)Keep the battery clean. The installed solar power storage batteries pole shall be coated with vase line to prevent corrosion of the pole.
(4)Configure on-line monitoring and management technology for solar power storage batteries, measure and analyze the internal resistance of solar power storage batteries on-line, find the defects of battery in time and maintain it in time.
(5) Prevent the solar power storage batteries from frost cracking in winter and direct sunlight in summer. The batteries should be placed in a ventilated, shady and cold place.
The more fully discharged the lithium battery pack, the greater the loss of the battery. The more fully charged the battery, the greater the loss of the battery. The lithium battery pack is in the middle of the power. In that case, the battery life is long.
Lithium Ion Battery Discharge Misunderstanding
At present, most batteries of electronic products use lithium battery pack. There is no need to charge the lithium battery to 100% full power, let alone use up the power. Under appropriate circumstances, try to keep the battery power near the half full state, and the smaller the range of charging and discharging, the better.
① The state of too high and too low electricity has an adverse impact on the life of lithium battery pack, while the number of charge and discharge cycles is secondary.
② The long-term low or no power state will increase the resistance to the movement of electrons in the battery, resulting in the reduction of the battery capacity.
③ Temperature also has a great impact on the service life of lithium battery pack.
④ The lithium battery pack will be easily scrapped if it is in full charge for a long time.
⑤ Don’t use it under high temperature. Don’t charge it when the temperature is too low. The battery power should not be too low as far as possible.
⑥ Try not to plug in the charger for a long time. The charger should be from a regular company. Do not use miscellaneous brands. Too fast charging speed will also affect the battery life.
Precautions for Lithium Ion Battery Storage
1. The battery cannot be charged immediately after it is discharged from the outdoor or retrieved at high temperature. It can be charged only after the surface temperature of the battery cools down.
2. Store in a dry and safe room; Low temperature storage will not damage the battery. But the battery temperature shall be increased during use, and it shall be placed in the vehicle as far as possible during outdoor use.
3. Pay attention to the “+” and “-” marks on the battery and electrical appliances, and correctly install the battery into the electrical appliances. If the battery is installed reversely, it may be short circuited. And it is resulting in overheating, leakage, discharge, rupture, explosion, fire and personal injury.
4. When replacing batteries, replace all batteries with new batteries of the same brand and model at the same time. When batteries of different brands and models or old and new batteries are mixed. Due to the difference of voltage or capacity. Some batteries may be over discharged or forcibly discharged, resulting in leakage, discharge, explosion, fire and personal injury.
5. Keeping the lithium battery pack moderately charged and discharged can prolong the battery life. Maintaining the power of lithium battery at 10% ~ 90% is conducive to protecting the battery. This means that there is no need to reach a large value when charging the batteries of digital products such as mobile phones and laptops.
The structure and characteristics of 12V lithium ion battery
When lithium ion battery cell is overcurrent, overcharged and overheated. The protection board will automatically disconnect the power supply. It is the safety cover of lithium ion battery. Once there is a problem with the protective plate, Combustion or explosion may occur.
the cell is equivalent to the core of 12V lithium ion battery. There are many kinds of cells, and the performance characteristics are also very different. Lithium iron phosphate and polymer lithium batteries have the characteristics of long service life, high safety and no memory. The failure of lithium iron phosphate battery cell is only combustion at most and will not explode.
Process technology is the key to determine the quality of lithium-ion batteries. Different manufacturers will have different technologies. Under the same conditions, inferior batteries are more likely to explode or burn. Fake and defective batteries are also an important factor causing many lithium-ion battery explosions. Therefore, when purchasing 12V lithium-ion batteries, we must choose reliable manufacturers.
Acupuncture: The damaged part will cause local short circuit and a large amount of heat, which will raise the internal temperature of the battery to the temperature of positive thermal decomposition, but at most let the battery cell burn without explosion;
Short circuit: a large amount of heat appears at the moment when the current passes through the battery, heating the battery to raise the battery temperature to the temperature of positive decomposition, which leads to battery heat out of control, resulting in combustion or explosion.
Ambient temperature: when the ambient temperature is too high, the interior of the battery is like a reaction chain, and the positive material will also undergo thermal decomposition in such an environment. In such a sealed case, the cell will bulge and burst when the pressure reaches the limit.