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The service life of lead-acid batteries is related to many factors and cannot be generalized. There are the following factors that affect the service life of lead-acid batteries:

1. Discharge depth

The discharge depth refers to the degree to which the discharge stops during use. 100% depth refers to the discharge of all capacity. The lifespan of lead-acid batteries is greatly affected by the discharge depth. The focus of design consideration is on deep cycle use, shallow cycle use, or float charging. If a shallow cycle battery is used for deep cycle use, it will quickly fail

Because the binding of the positive electrode active material lead dioxide itself is not strong, lead sulfate is generated during discharge, and it returns to lead dioxide during charging. The molar volume of lead sulfate is larger than that of lead oxide, so the volume of the active material expands during discharge. If one mole of lead oxide is converted to one mole of lead sulfate, the volume increases by 95%. This repeated contraction and expansion gradually relaxes the binding between lead dioxide particles, making it easy to fall off. If only 20% of the active material in one mole of lead dioxide is discharged, the degree of contraction and expansion is greatly reduced, and the damage to the binding force slows down. Therefore, the deeper the discharge depth, the shorter the cycle life

2. Overcharge level

During overcharging, a large amount of gas precipitates, and at this time, the active substance on the positive electrode plate is subjected to the impact of the gas, which will promote the detachment of the active substance; In addition, the positive electrode grid alloy also suffers from severe anodic oxidation and corrosion, so overcharging the battery can shorten its application period

3. The influence of temperature

The lifespan of lead-acid batteries increases with temperature. Between 10 ℃ and 35 ℃, for every 1 ℃ increase, it increases by approximately 5-6 cycles. Between 35 ℃ and 45 ℃, for every 1 ℃ increase, the lifespan can be extended by more than 25 cycles; Above 50 ℃, the lifespan is reduced due to the loss of negative electrode sulfurization capacity

The battery life increases with temperature within a certain temperature range because the capacity increases with temperature. If the discharge capacity remains unchanged, the discharge depth decreases and the solid life extends as the temperature increases

4. The influence of sulfuric acid concentration

The increase in acid density is beneficial for the capacity of the positive electrode plate, but the increase in self discharge of the battery accelerates the corrosion of the grid, and also promotes the loose detachment of lead dioxide. With the increase in acid density used in the battery, the cycle life decreases

5. The influence of discharge current density

As the discharge current density increases, the lifespan of the battery decreases because under high current density and high acid concentration conditions, it promotes the loose detachment of lead dioxide from the positive electrode

The design float life of domestic single 12V lead-acid batteries is 5-8 years, but they are completely scrapped within 1-2 years; Regardless of any lead-acid battery (including domestic and imported), there is always a vicious cycle of early scrapping in use. This is a globally recognized problem for over 140 years since the invention of lead-acid batteries - irreversible vulcanization of lead-acid batteries, which leads to a significant reduction in battery life and premature scrapping of batteries.

Reasons and manifestations of scrapping lead-acid batteries:

There are factors related to the intrinsic quality of batteries, as well as factors related to the usage methods and occasions of batteries, but over 80% of them are still due to the electrochemical reaction principle of lead-acid batteries themselves. A battery is a power source that can undergo reversible charging and discharging reactions. After discharge, the substances in the battery react and transform into a crystal called lead sulfate. After charging, lead sulfate is then converted into lead and sulfuric acid, resulting in a reversible reaction. However, when the reaction conditions are not complete and sufficient, lead sulfate cannot be completely converted, resulting in the accumulation of lead sulfate and reducing the amount of substances involved in the reaction. This is reflected in the decreasing battery capacity, ultimately leading to the loss of basic functions and becoming waste. This phenomenon in lead-acid batteries is called "vulcanization" (also known as aging).

During the charging and discharging process of lead-acid batteries, lead sulfate crystals gradually form on the electrode plate. This phenomenon leads to battery aging, which is manifested as: difficulty in charging and discharging the battery; Reduced battery capacity; Furthermore, it promotes the corrosion of the electrode plate and reduces the service life of the battery. The lead-acid battery extension maintenance device solves the above problems with ease. It can completely restore expired batteries caused by lead sulfate crystal formation. It not only brings huge economic benefits to users, but also saves a lot of natural resources and energy for the country, and reduces the serious environmental impact of waste batteries

Pollution. The widespread application of this technology will bring enormous benefits to the economy, environment, and society.

Lead acid battery (VRLA) is a type of battery where the electrodes are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. In the discharge state of lead-acid batteries, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead; In the charging state, the main component of the positive and negative electrodes is lead sulfate.

The nominal voltage of a single cell lead-acid battery is 2.0V, which can discharge up to 1.5V and charge up to 2.4V; In applications, six single cell lead-acid batteries are often connected in series to form lead-acid batteries with a nominal voltage of 12V, as well as 24V, 36V, 48V, etc.

The Frenchman Prandtl invented lead-acid batteries in 1859 and has gone through nearly 150 years of development. lead-acid batteries have made significant progress in theoretical research, product types and varieties, and electrical performance. Whether in transportation, communication, electricity, specialty, navigation, and other economic fields, lead-acid batteries have played an indispensable and important role.

Construction of lead-acid batteries

Construction of lead-acid batteries

According to the differences in structure and use of lead-acid batteries, they can be roughly divided into four categories: 1. Lead acid batteries for starting; 2. Lead acid batteries for power use; 3. Fixed valve controlled sealed lead-acid batteries; 4. Other categories include small valve controlled sealed lead-acid batteries, lead-acid batteries for mining lamps, etc.

The nominal voltage of a single cell lead-acid battery is 2.0V, which can discharge up to 1.5V and charge up to 2.4V. In applications, six single cell lead-acid batteries are often connected in series to form a nominal 12V lead-acid battery. There are also 24V, 36V, 48V, etc.

Main features

Safe sealing

Lead acid battery

Lead acid battery

During normal operation, the electrolyte will not leak from the terminals or casing of the battery. No free acids

The special suction partition keeps the acid inside, and there is no free acid inside the battery, so the battery can be placed in any position.

Air release system

After the internal pressure of the battery exceeds the normal level, the VRLA battery will release excess gas and automatically reseal to ensure that there is no excess gas inside the battery.

Easy maintenance

Due to the gas recombination system converting the generated gas into water, there is no need to add water during the use of VRLA batteries.

Long service life

The VRLA battery, which adopts a corrosion-resistant structure and a lead calcium alloy fence board, can be used for floating charging for 10-15 years.

Stable quality and high reliability

By adopting advanced production processes and strict quality control systems, VRLA batteries have stable quality and reliable performance. Voltage, capacity, and

Seal and conduct 100% inspection online.

Security certification

All VRLA batteries have passed UL safety certification.

Product application

emergency power supply

*Telecommunications

*Solar energy system

*Electronic switch system

*Communication equipment: base station, PBX，CATV,WLL,ONU,STB, Cordless phones, etc

*Backup power supply: UPS, ECR, computer backup system, Sequence, ETC, etc

*Emergency equipment: emergency lights, fire and theft alarms, fire dampers

Main power supply

*Communication equipment: transceiver

*Electric controlled locomotives: collection vehicles, automatic transport vehicles, electric wheelchairs, cleaning robots, electric vehicles, etc

*Mechanical tool starters: lawn mowers, hedgetrimmers, cordless drills, electric screwdrivers, electric sleds, etc

*Industrial equipment/instruments

*Camera: flash, VTR/VCR, movie lights, etc

Other portable devices, etc

product mix

The VRLA battery is designed in this way: in the battery, a portion of the electrolyte is absorbed into the electrode and separator to increase the negative electrode's oxygen absorption capacity, prevent electrolyte loss, and enable the battery to achieve sealing.

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