How Long Is The True Life Of Lead-acid Batteries?

How Long Is The True Life Of Lead-acid Batteries?

Date:Dec 10, 2020

1. Depth of discharge

The depth of discharge refers to the extent to which the discharge starts and stops during use. 100% depth refers to the full capacity released. The life of lead-acid batteries is greatly affected by the depth of discharge. The focus of design consideration is deep cycle use, shallow cycle use or floating charge use. If the battery used in shallow cycle is used in deep cycle, the lead-acid battery will quickly fail.

Because the positive active material lead dioxide itself is not well-bonded with each other, lead sulfate is generated during discharge, and returns to lead dioxide during charging. The molar volume of lead sulfate is larger than that of lead oxide, and the volume of the active material expands during discharge. If one mole of lead oxide is converted into one mole of lead sulfate, the volume will increase by 95%. Repeated contraction and expansion will gradually loosen the bond between the lead dioxide particles and easily fall off. If only 20% of the active material of one mole of lead dioxide is discharged, the degree of contraction and expansion will be greatly reduced, and the destruction of binding force will become slower. Therefore, the deeper the discharge depth, the shorter the cycle life.

2. Overcharge level

A large amount of gas is precipitated during overcharging. At this time, the active material of the positive plate is impacted by the gas. This impact will promote the active material to fall off; in addition, the positive electrode grid alloy also suffers from severe anodic oxidation and corrosion, so the battery will be overcharged. The application period is shortened.

3. The influence of temperature

The lifespan of lead-acid batteries increases with increasing temperature. Between 10°C and 35°C, every 1°C increase will increase about 5~6 cycles. Between 35°C and 45°C, each 1°C increase can prolong life by more than 25 cycles; higher than 50°C will be due to The vulcanization capacity of the negative electrode is lost and the life is reduced.

Battery life increases with increasing temperature within a certain temperature range because the capacity increases with increasing temperature. If the discharge capacity does not change, the depth of discharge decreases when the temperature increases, and the solid life is extended.

Is the service life of lead-acid batteries the number of years or the number of uses_what is the difference between lead-carbon batteries and lead-acid batteries and lead-carbon batteries

4. The influence of sulfuric acid concentration

Although the increase in acid density is beneficial to the capacity of the positive plate, the self-discharge of the battery increases and the corrosion of the grid accelerates, which also promotes the loosening of lead dioxide. As the acid density in the battery increases, the cycle life decreases.

5. The influence of discharge current density

As the discharge current density increases, the battery's lifespan decreases, because under the conditions of high current density and high acid concentration, the positive lead dioxide is promoted to loosen and fall off.

Lead-carbon batteries are an innovative technology of lead-acid batteries, which have many advantages over lead-acid batteries. Lead-carbon batteries have the following advantages: First, they charge fast, increasing the charging speed by 8 times; Second, the discharge power is increased by 3 times; Third, the cycle life is increased to 6 times, and the number of cycle charging is 2000 times; Fourth, the cost performance is higher than that of lead. The price of acid batteries has increased, but the cycle life has been greatly improved; fifth, it is safe and stable to use, and can be widely used in various new energy and energy-saving fields. In addition, lead-carbon batteries also take advantage of the specific energy advantages of lead-acid batteries, and have very good charge and discharge performance-it can be fully charged in 90 minutes (the life of lead-acid batteries is less than 30 times if charged and discharged in this way). Moreover, the addition of carbon (graphene) prevents the sulfation of the negative electrode and improves a factor of battery failure.

Lead-carbon battery is a new type of super battery that combines both lead-acid batteries and supercapacitors: it not only takes advantage of the instant large-capacity charging of supercapacitors, but also takes advantage of the specific energy advantages of lead-acid batteries, and has very Good charging and discharging performance-it can be fully charged in 90 minutes (the life of lead-acid battery is less than 30 times if it is charged and discharged in this way). Moreover, the addition of carbon (graphene) prevents the sulfation of the negative electrode, which improves a factor of battery failure in the past and extends the battery life. Lead-carbon battery is a mixture of asymmetric supercapacitors and lead-acid batteries using internal parallel connection. As a new type of super battery, lead-carbon batteries are a combination of lead-acid batteries and supercapacitors. A dual-function energy storage battery with both capacitive and battery characteristics. Therefore, both the advantages of instantaneous power and large-capacity charging of supercapacitors are brought into play, and the energy advantages of lead-acid batteries are also used, which can be fully charged in one hour. Has good charge and discharge performance. Due to the use of lead-carbon technology, the performance of lead-carbon batteries is far superior to traditional lead-acid batteries, and can be used in new energy vehicles, such as hybrid vehicles, electric bicycles, etc.; it can also be used in the field of new energy storage. Such as wind power generation and energy storage. Lead-carbon batteries have the advantages of low cost and mature industrial manufacturing similar to traditional lead-acid batteries, and have strong competitive advantages in various application fields.

This hybrid technology can quickly output and input charges during vehicle acceleration and braking, and is particularly suitable for the "stop-start" system of micro-hybrid vehicles. Lead-carbon batteries can increase the power of the original lead-acid batteries and extend their service life.

Lead-carbon battery characteristics:

Technical advantages

The first is fast charging, which increases the charging speed by 8 times; the second is the discharge power is increased by 3 times; the third is the cycle life is increased to 6 times, and the number of recharging cycles reaches 2000; the fourth is the high cost performance, which is lower than the price of lead-acid batteries Improved, but the cycle life is greatly improved; Fifth, it is safe and stable to use, and can be widely used in various new energy and energy-saving fields. In addition, lead-carbon batteries also take advantage of the specific energy advantages of lead-acid batteries, and have very good charge-discharge performance-it can be fully charged in 90 minutes (the life of lead-acid batteries is less than 30 times if charged and discharged in this way). Moreover, the addition of carbon (graphene) prevents the sulfation of the negative electrode and improves a factor of battery failure.

1. The positive and negative lead paste adopts a unique formula and optimized curing process. The positive electrode active material has strong anti-softening ability, good deep cycle life, and high active material utilization rate; the negative electrode lead paste has strong anti-sulfurization ability, low capacity decay rate, and good low-temperature startup performance.

2. The positive electrode grid adopts new special alloy and reasonable structure design, which has good corrosion resistance, reasonable current distribution, close combination with active materials, high current performance and strong charge acceptance.

3. Using new electrolyte additives, the battery has high hydrogen and oxygen evolution over potential, and the battery is not easy to lose water

4. When the battery is charged and discharged with frequent instantaneous high current, the current is mainly released or received by the carbon material with capacitive characteristics, which inhibits the "sulfation of the negative electrode" of the lead-acid battery and effectively extends the battery life;

5. When the battery is working at low current for a long time, it is mainly operated by the sponge lead negative electrode to continuously provide energy;

6. The high carbon content of Lead-carbon super composite electrode makes the electrode have better low-temperature starting ability, charge acceptance and high current charge and discharge performance than traditional lead-acid batteries.


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