What are the advantages of gel batteries?

The colloidal battery is a lead-acid battery in which a gelling agent is added to the sulfuric acid to change the sulfuric acid electrolysis into a colloidal state. The difference with conventional lead-acid batteries is not only that the electro-hydraulic is changed to gelatinous. For example, non-solidified aqueous colloids are the same colloidal battery from the electrochemical classification structure and characteristics. Another example is the attachment of polymer materials in the grid, commonly known as ceramic grids, which can also be regarded as the application characteristics of gel batteries. Recently, the laboratory has added a targeting coupling agent to the plate formulation, which greatly improved the reaction utilization rate of the active material of the plate. According to non-public data, the energy ratio of 70wh/kg can be achieved. Features:

1: The inside of the colloidal battery is mainly SiO2 porous network structure, there are a lot of tiny gaps, which can make the oxygen generated by the positive electrode of the battery migrate smoothly to the negative electrode plate, which is convenient for the negative electrode to absorb and combine; 2: The acid battery has a large amount of acid Therefore, its capacity is basically the same as AGM battery; 3: the internal resistance of the gel battery is large, generally does not have good high current discharge characteristics; 4: heat is easy to spread, not easy to heat up, the probability of thermal runaway is small;

This component is also a gel formed by sulfuric acid, water and silica. Therefore, it is water or sulfuric acid which produces electrochemical action. The reaction process is not much different, but the structural change can bring many advantages. Specifically, please ask the mosaic users to introduce more.

China's colloidal batteries are still using AGM separators. In the early days, I also had to put Chinese colloidal batteries on the quotation marks to distinguish them from the German colloidal batteries. Later, I wrote more and ignored them. China In addition to the so-called gel battery, there are many different methods of calling, such as: "lead crystal battery", "solid battery", "silicon battery", "battery battery".

The domestic colloidal battery said by the mosaic users, when filling the glue, half of it is also filled, they call themselves "semi-colloid battery", the lower part has ordinary electrolyte and the upper part is colloid.

The advantage of the gel battery is that it has good cycle life, over-discharge resistance, long-term insufficiency of electricity and discharge (AGM battery is easy to use vulcanization failure), and high-temperature performance is better than AGM.

To put it bluntly, it is tolerant to abuse.

I said that there are very few domestic manufacturers of colloidal batteries for such lithographic paste plates. Except for our Haizhi, the output of Shuangdeng is not small, and there are no big factories.

The cost of such colloidal batteries is obviously higher than that of ordinary batteries, and it is generally used by industry users.

Advantage

The main advantages of colloidal batteries: high quality and long cycle life. The colloidal electrolyte can form a solid protective layer around the plates, protect the plates from damage or breakage caused by vibration or collision, prevent the plates from being corroded, and reduce the bending of the plates and the plates between the plates during heavy load. The short circuit does not lead to a decrease in capacity and has good physical and chemical protection, which is twice the life of a normal lead-acid battery.

It’s safe to use, environmentally friendly, and a true green power source. The electrolyte of the colloidal battery is solid, sealed, gel electrolyte, never leaking, so that the specific gravity of each part of the battery is consistent. The use of special calcium-lead-tin alloy grids is more resistant to corrosion and better charge acceptance. Use ultra-high strength separators to avoid short circuits. It is imported high quality safety valve, precise valve control to regulate pressure. Equipped with a filter acid mist explosion-proof device, it is safer and more reliable. When used, there is no acid mist gas precipitation, no electrolyte overflow, no harmful elements in the production process, no toxicity, no pollution, and avoid the large amount of electrolyte leakage in the traditional lead-acid battery during use. The float charge flow is small, the battery generates less heat, and the electrolyte does not undergo acid stratification.

Deep discharge cycle performance is good. After the battery is deeply discharged and then recharged in time, the capacity can be 100% recharged, which can meet the needs of high frequency and deep discharge, so its use range is wider than that of lead-acid batteries.

The self-discharge is small, the deep discharge performance is good, the charging acceptance ability is strong, the upper and lower potential difference is small, and the electric capacity is large. In the low temperature start-up ability, charge retention ability, electrolyte retention capacity, cycle durability, vibration resistance, temperature resistance and other aspects have been significantly improved. It is stored at 20 ° C for 2 years at room temperature, ready to run without charging.

Adapt to the environment (temperature) a wide range. It can be used in the temperature range of -40 ° C - 65 ° C, especially low temperature performance, suitable for cold and cold regions in the north. It has good seismic performance and can be safely used in various harsh environments. It is not limited by space and can be placed in any position when in use.

It is quick and convenient to use. Since the internal resistance, capacity and float voltage of the single battery are consistent, there is no need for balanced charging and no need for frequent maintenance.

Disadvantage

Production technology is difficult and costly.

There are two measures for the life of the battery. One is the life of the float, that is, the number of years that the maximum capacity of the battery can be released is not less than 80% of the rated capacity under standard temperature and continuous floating state.

The second is the 80% deep cycle charge and discharge times, that is, the full capacity of the German solar battery to discharge 80% of the rated capacity and then fully charged, so the number of times that can be recycled. Often, engineers pay attention to the former and ignore the latter.

The 80% deep cycle charge and discharge times represent the actual number of times the battery can be used. In the case of frequent power outages or low mains quality, when the actual number of times the battery has been used has exceeded the specified number of cycles of charge and discharge, despite the actual use time calibrated float life has not been reached, but the battery has actually failed. If it is not found in time, it will bring a big accident.

Therefore, when choosing a battery, we should pay attention to both life indicators. The latter is especially important under the condition that the main is often interrupted. When choosing a UPS for German solar cells, we should consider a sufficient float life margin. According to experience, the actual service life of a battery is often only 50% to 80% of the life of the calibration float. This is because the actual float life of the battery is related to many factors such as defining the standard temperature, the actual ambient temperature, the battery charging voltage, and the maintenance of the battery.

When the actual ambient temperature rises by 10 °C than the defined standard ambient temperature, the battery will be shortened by half due to the internal chemical reaction speed doubled. Therefore, the UPS battery room should be equipped with air conditioning equipment. In terms of defining temperature values, the European standard is 20 ° C, and the standards of China, Japan, and the United States are 25 ° C. A battery with a floating life of 10 ° C for 10 years is equivalent to a 25 ° C standard, which is equivalent to a floating life of 7 to 8 years.

The nominal float life of the associated battery should be the value obtained by dividing the actual battery life of our desired battery by a life factor. This life factor is usually determined empirically, with a high reliability of 0.8 for battery reliability and 0.5 for low reliability.

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