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How to charge a sealed lead acid battery

With the development of science and technology, sealed lead-acid batteries are widely used in various fields, such as UPS power supply, power system, communication equipment, electric vehicles, etc., due to their low cost, large capacity, and good safety performance. However, how to properly charge sealed lead-acid batteries to improve battery life and performance has become a concern for many people. This article will deeply discuss the principle, characteristics, charging methods and application scenarios of sealed lead-acid battery, and reveal its charm for you.
sealed lead-acid battery

Principles of sealed lead-acid battery

Sealed lead-acid battery, also known as valve-regulated lead-acid battery, is a chemical power source that uses redox reactions to convert electrical energy. It is mainly composed of positive plate, negative plate, electrolyte and separator. During the charging process, the active material PbO2 on the positive plate undergoes a redox reaction with the active material Pb on the negative plate, converting electrical energy into chemical energy; during discharge, the chemical energy is converted into electrical energy.
Compared with traditional open lead-acid batteries, sealed lead-acid batteries have innovations in design and structure, which makes the electrolyte inside the battery not easy to lose, thereby reducing maintenance costs and prolonging the service life.
Sealed lead-acid batteries work on the same principle as conventional lead-acid batteries, generating electricity through a chemical reaction between sulfuric acid and lead plates. In terms of structure, the sealed lead-acid battery uses a special sealing material to isolate the electrolyte inside the battery from the external environment, effectively avoiding leakage and corrosion of the electrolyte.
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Features of sealed lead-acid battery

1. Cycle life: Sealed lead-acid batteries have a relatively high life in the process of cycle charge and discharge. Under normal use conditions, the cycle life of sealed lead-acid batteries can reach 500-1000 times, or even higher. This makes sealed lead-acid batteries advantageous in scenarios that require frequent charging and discharging, such as electric vehicles, electric energy storage, etc.
2. Strong endurance: the sealed lead-acid battery has a large capacity and a gentle discharge curve, which can provide a durable and stable power source for electrical appliances;
3. High stability: The sealed lead-acid battery adopts valve control technology, which can effectively prevent electrolyte leakage and gas generation, thereby improving the stability of the battery.
4. Strong reliability: The manufacturing process of sealed lead-acid batteries is relatively mature, and the material cost is low, which effectively guarantees the reliability of the battery.
5. Large capacity: The sealed lead-acid battery has a large capacity, which can meet the power demand of various equipment.
6. Low self-discharge rate: The self-discharge rate of sealed lead-acid batteries is low, which can ensure that the battery will not lose too much power during storage.
7. Strong environmental adaptability: sealed lead-acid batteries can still maintain stable performance in harsh environments such as high temperature and low temperature.
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12v sealed lead acid battery

Advantages and disadvantages of sealed lead-acid battery

1. Mature technology
The development history of sealed lead-acid batteries has exceeded 100 years, and the technology maturity is quite high. Among the many types of batteries, sealed lead-acid batteries are undoubtedly one of the most popular. Its long history, stable performance and environmental protection features make it a leader in the battery industry.
2. Stable performance
Sealed lead-acid batteries have very high stability during charging and discharging, which is mainly due to their internal structural design. The inside of the sealed lead-acid battery adopts a multi-layer sealing structure, which effectively prevents the leakage of the electrolyte, so that the battery can work stably in various environments.
3. Environmental protection features
Sealed lead-acid batteries have less environmental pollution during the production process, and are less likely to produce environmental pollutants during use. In addition, its recycling after scrapping is relatively simple and will not cause a large burden on the environment.
4. Large capacity
Sealed lead-acid batteries come in relatively large capacities, ranging from 3 Ah to 5000 Ah. This allows it to meet the needs of different occasions and equipment, and provide stable power for various electrical appliances.
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sealed lead-acid battery (2) Shortcomings

1. Heavy weight
Sealed lead-acid batteries are relatively heavy while ensuring capacity. For some occasions that require high portability, sealed lead-acid batteries may not be the best choice.
2. The charging and discharging speed is relatively slow
The charging and discharging speed of sealed lead-acid batteries is relatively slow, which cannot meet some occasions that require high instantaneous high current. However, in daily use, its charging and discharging speed can fully meet the needs of most devices.
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Application scenarios of sealed lead-acid battery

1. Power system: Sealed lead-acid batteries are used as a backup power supply, which can provide stable and reliable power supply guarantee for the power system, such as uninterruptible power supply (UPS), emergency power supply (EPS), etc.
2. Communication system: Sealed lead-acid batteries play a vital role in communication systems, providing stable power support for base stations, dispatch centers and other equipment.
3. Emergency lighting: Sealed lead-acid batteries can provide long-lasting and stable power for emergency lighting systems to ensure that lighting can be provided in time in emergencies.

4. Electric vehicles: Sealed lead-acid batteries are one of the main power sources of electric vehicles. Their stability and reliability have been widely recognized by the market, and they can provide long-mileage and high-performance power support for electric vehicles.
5. Solar energy storage: sealed lead-acid batteries can be used as energy storage equipment for solar power generation systems to achieve efficient use of solar energy.
6. Military equipment: Sealed lead-acid batteries are also widely used in military equipment, such as armored vehicles and ships.


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Charging methods of sealed lead-acid battery

With the rapid development of science and technology, energy storage power supply has gradually become an essential choice for people's family emergency and outdoor activities.
Portable power station with built-in sealed lead-acid battery, as the name suggests, refers to the power supply equipment that uses sealed lead-acid battery as the energy storage device inside the power supply. Compared with the traditional portable power station, its biggest advantage lies in its higher safety performance, longer service life and more convenient charging method.
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Portable power station with built-in sealed lead-acid battery adopts intelligent charging technology in the charging method. This technology can automatically adjust the charging current according to the state of the battery to avoid battery damage caused by overcharging. At the same time, the system also has overcharge protection, overdischarge protection and other functions to ensure the safety performance of the battery during charging. This technology can also improve the charging efficiency of the battery, further extending the service life of the battery.
Portable power station with built-in sealed lead-acid batteries generally support various methods such as solar charging and AC charging. Users can choose the most suitable charging method according to different usage scenarios. This variety of charging methods enables users to charge the power supply more conveniently during use.


We are a professional portable solar power station manufacturer and supplier in China. Our product models such as 200W portable solar power station with lead-acid batty(Eg003), 500W portable solar power station with lead-acid batty (Eg004), 150W portable solar power station with lead-acid batty(Eg008).They all sealed have built-in lead-acid batteries. Compared with traditional portable power station, those with built-in sealed lead-acid batteries have obvious advantages in performance. Sealed lead-acid batteries have high pressure and temperature resistance, and can adapt to various harsh environments. Portable power station with built-in sealed lead-acid battery pays attention to safety performance during the design and production process. There are multiple safety protection devices inside the battery, which can effectively prevent overcharge, overdischarge, overcurrent, short circuit and other phenomena to ensure user safety. Our products support AC charging and solar charging, and can provide you with stable and reliable power.
With its excellent performance and stability, sealed lead-acid battery has become an ideal power source choice in many fields. With the continuous development of science and technology, there is still a lot of room for improvement in terms of materials, technology and performance of sealed lead-acid batteries in the future. As a member of the battery industry, we should continue to pay attention to the research progress of sealed lead-acid battery, strive to improve their performance and application range, and contribute to the promotion of global sustainable development and green energy revolution.

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