How long is solar gel battery lifetime?

One factor is temperature condition. If temperature is high,, the lifetime will reduce by half for every 10 degrees of increase when we use 25 degrees as datum

There are also charging conditions. If you are often undercharged and charge less, then it will be "broken" very quickly. The charge of a single cycle should be more than 1.2 times the discharge.

There is also the depth of discharge. For example, if only 30% of the actual capacity of the battery is discharged, it can be circulated more than 1500 times, that is, about 4 years, but if it is 80% every time, it is only more than a year, 100%. It is about a year.

At the same time, do not believe that the applicable life of unconditionally promised by some manufacturers is unscientific. The actual life is this algorithm

Lead-acid battery scrapping reasons and performance:

There are factors in the internal quality of the battery, as well as factors in the use and occasion of the battery, but more than 80% are due to the electrochemical reaction principle of the lead-acid battery itself. The battery is a power source that can perform a reversible reaction of charge and discharge. After the discharge, the substance in the battery reacts into a crystal called lead sulfate. After charging, the lead sulfate converted into lead and sulfuric acid, so that the reaction is reversible. However, when the reaction conditions are not complete and sufficient, lead sulfate cannot be completely converted, resulting in the accumulation of lead sulfate, thereby reducing the amount of substances involved in the reaction, which is reflected in the battery output is less and less battery capacity. Eventually it loses its basic function and becomes waste. This phenomenon of lead-acid batteries called "vulcanization" (also known as aging).

Lead-acid batteries gradually produce lead sulfate crystals on the electrode plates during charge and discharge. This phenomenon leads to the aging of the battery, which is characterized by: difficulty in charging and discharging the battery; lowering the battery capacity; further promoting the corrosion of the electrode plate to reduce the service life of the battery, and the lead-acid battery extension maintenance device solves the above problems. It can completely recover the battery that has expired due to lead sulfate crystals. While it brings huge economic benefits to users, it also saves the country a lot of natural resources and energy, and reduces the serious environmental pollution of used batteries.

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

Colloidal battery editing

The colloidal lead-acid battery is an improvement of the ordinary lead-acid battery for the liquid electrolyte. The colloidal electrolyte substituted for the sulfuric acid electrolyte, which is improved compared with the ordinary battery in terms of safety, storage capacity, and discharge performance and service life.

The colloidal lead-acid battery adopts a gel electrolyte, and there is no free liquid inside. The electrolyte capacity is large under the same volume, the heat capacity is large, and the heat dissipation ability is strong, which can avoid the thermal runaway phenomenon of the general storage battery; the electrolyte concentration is low, and the electrolyte plate is low. The corrosion effect is weak; the concentration is uniform, and there is no electrolyte stratification.

The performance of colloidal lead-acid battery is better than that of valve-regulated sealed lead-acid battery. The colloidal lead-acid battery has stable performance, high reliability, long service life, strong adaptability to ambient temperature (high and low temperature), and long-term discharge capacity. , cycle discharge capacity, deep discharge and high current discharge capacity, overcharge and over discharge self-protection.

The domestic colloidal lead-acid battery used for electric bicycle is vacuum infused in the AGM separator, and the silica gel and sulfuric acid solution poured between the positive and negative plates of the battery. The colloidal lead-acid battery cannot circulated in the initial stage of use. This is because colloid encloses both positive and negative plates. the oxygen generated on the positive plate cannot diffuse to the negative plate, and the lead reduction of the active material on the negative plate cannot achieved. The exhaust valve can only discharge it, which is consistent with the flooded battery.

After the colloidal lead-acid battery used for a period, the colloid starts to crack and shrink, and cracks generated. The oxygen passes through the crack directly to the negative plate for oxygen circulation. The exhaust valve is no longer open frequently, and the colloidal lead-acid battery is close to sealing work, with little water loss. Therefore, the main failure of the electric bicycle battery is the water loss mechanism. The use of the colloidal lead-acid battery can achieve very good results. The colloidal electrolyte obtained by adding a gelling agent to the electrolyte to solidify the sulfuric acid electrolyte into a gelatinous substance. Usually, the colloidal electrolyte further provided with a colloidal stabilizer and a compatibilizer, and some colloidal formulations provided with a retarding colloid solidification and retardation. To facilitate the filling of the gel.

Fumed silica

The colloidal battery gel is fumed silica, which is a high-purity white odorless nano-powder material with thickening, anti-caking, control system rheology and thixotropic effects, in addition to traditional In addition; it has been widely used in colloidal batteries in recent years.

Fumed silica is a nano-scale white powder formed by high temperature hydrolysis of silicon halide in a oxyhydrogen flame. It commonly known as fumed silica. It is an amorphous silica product with a primary particle size of 7-40 nm. The aggregate has a particle size of about 200-500 nm, a specific surface area of 100-400 m2/g, a high purity, and a SiO2 content of not less than 99.8%. The surface untreated fumed silica aggregates contain a plurality of silanol groups, one is an isolated, undisturbed free hydroxyl group; and the other is a bonded silanol group, which forms hydrogen bonds with each other. The surface untreated fumed silica aggregate is an aggregate containing a plurality of -OH, which easily forms a uniform three-dimensional network structure (hydrogen bond) in a liquid system. When the three-dimensional network structure (hydrogen bond) has an external force (shear force, electric field force, etc.), the medium is thinned, the viscosity is decreased, and once the external force disappears, the three-dimensional structure (hydrogen bond) recovers itself and the viscosity rises, that is, This thixotropy is reversible.

Fumed silica mainly used in colloidal storage batteries for its excellent thickening thixotropic properties. The colloidal electrolyte is composed of fumed silica and a certain concentration of sulfuric acid solution in a certain proportion. The sulfuric acid and water in the electrolyte it is "stored" in a silicone gel network and is a "soft solid gel" that appears solid when stationary. When the battery is charged, the "electrolyzed water" reaction in the later stage of charging causes the oxygen generated by the positive electrode to be absorbed by the negative electrode through the numerous cracks, and further It is reduced to water to achieve a battery seal cycle reaction. The concentration of sulfuric acid in the electrolyte at the time of discharge makes it "thinning" and becomes a thin state of the gel before the battery poured. Therefore, the gel battery has a "maintenance-free" effect. The basic use of fumed silica at home and abroad is Degussa AEROSIL200.

Excellent properties of colloidal batteries

1, can significantly extend the life of the battery. According to the relevant literature, the battery life can be extended by 2-3 times.

2. The self-discharge performance of the colloidal lead-acid battery has significantly improved. Under the same sulfuric acid purity and water quality, the storage time of the battery can be extended by more than 2 times.

3. The colloidal lead-acid battery has obvious anti-vulcanization performance in the case of severe power shortage.

4. Colloidal lead-acid batteries have strong recovery ability under severe discharge conditions.

5, colloidal lead-acid battery anti-overcharge ability, through two lead-acid batteries (a colloidal lead-acid battery, a valve-controlled sealed lead-acid battery) also repeated several overcharge test, colloidal lead-acid battery capacity The drop is slower, and the valve-regulated sealed lead-acid battery has a significant drop in capacity due to excessive water consumption.

6. The late period discharge performance of colloidal lead-acid battery has significantly improved.

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