OPzV Battery


With the development of science and technology, the advent of the information age, the large-scale construction of data center and communication center, the rapid development of computers and a large number of communication equipment, and the growing demand for green power. OPzV battery has the characteristics of large capacity, long cycle life, and less maintenance. As a backup power supply and energy storage power supply, OPzV battery is used in various aspects. The power supply quality of OPzV battery is focused on users, and the market is growing.

On an interesting note… OPzV battery Definition is derived from German words and stands for  O – Ortsfest (in German means Stationary) Pz – PanZerPlate means Tubular plate (for sturdy and robust) V – Stands for Verschlossen or Closed.

What is OPzV battery?

OPzV batteries are deep cycle batteries and generally refer to Sealed Maintenance Free Tubular Gel lead Acid Batteries in ABS containers. These batteries have a cell voltage of  2 volts and are connected together to obtain required voltages, usually used as a backup source in, Solar Battery applications, Power Generating Stations & Substation, Oil & Gas, Nuclear, Hydro & Thermal Power Generation Facilities, and Standby applications. The electrolyte is in gelled form and the battery does not leak.

The capacity range of OpzV battery (Valve controlled sealed gel battery) is from 200ah to 3000ah. The battery pack is composed of 2V single cell batteries, that is, 24 or 30 single cells constitute 48V or 60V batteries respectively. It’s important to note that the battery of the same quality should be used in a group of batteries, so as not to cause a voltage drop, thus affecting the service life of the battery. Spaceflight Power has more than 25 years of experience in manufacturing lead-acid batteries. After years of technical summary and update, there are 12 automatic production chains. The quality of opzv batteries produced is stable, which is a good choice.

Each cell in the battery pack is sealed to prevent oxygen from entering. In order to release the overpressure that may form in the battery, a safety valve is installed on the battery cover. This kind of battery has the following characteristics: the capacity range is 200ah-3000ah, the volume is smaller than the ordinary lead-acid battery with the same capacity; it has little self discharge and almost no water loss; it can be placed in any orientation without the risk of electrolyte leakage.

These batteries are installed in various portable electronic devices and used in various fixed UPS systems, such as communication systems, alarm systems, and data centers. This kind of battery also has a great advantage: the battery is not recharged in time after deep discharge, that is, recharging shortly after discharge (such as a few weeks), which has no adverse effect on the OPzV battery and does not affect the service life of OPzV battery.

OPzV batteries offer the highest cycle life among all other lead-acid batteries, with significant savings on the cost per cycle. They are maintenance-free and have robust construction, providing the highest level of reliability and performance. OPzV batteries have superior deep discharge durability and excellent recharging properties. They are the best choice of batteries for industrial projects, even in remote installations with minimal supervision. In some regions of the world, where electricity is unstable, high capacity backup power is required. Whether you’re generating backup power from solar panels or wind turbines, frequent power outages require high performing batteries with excellent deep cycling capabilities.

What are 2v OPzV batteries? OPzV battery meaning

There are two principal methods for acid immobilisation:use of absorptive glass mat which holds the acid in place called AGM VRLA batteries.The other, adding a fine silica powder to make a gel as in Gel Battery

Both methods, although very different, achieve the goal of immobilisation. They also provide the added benefit of recombining the gases released on charge to reform water, thereby removing the need for the water-addition maintenance procedures mentioned earlier for flooded lead-acid batteries.

Out of these two methods, the use of silica-gelled electrolyte is universally recognised as the best solution for deep discharge gel cell battery designs. There are two main reasons for this: the first is that the use of gelled electrolyte allows a tubular positive plate to be used, which is recognised as providing the best deep cycle properties for lead-acid batteries. The second reason is that the stratification of acid associated with deep discharges and limited-voltage recharging without gassing is avoided.

OPzV Battery technology

So just how do this combination of tubular plate and GEL electrolyte work? To understand we have to look at several elements which contribute to the battery’s properties, these are:

An electrolyte which is immobilized as a GEL to ensure non-spillage and also to enable the transportation of hydrogen and oxygen released on charging (which is held inside the battery under pressure) to be recombined to form water. The benefit of immobilization extends further, it prevents the creation of strata of acid with different densities within the cells, called Acid Stratification.

In flooded batteries and sometimes AGM VRLA designs, denser gravity acid produced at the plates during charge can drop to the bottom of the cell leaving the weaker gravity acid at the top. Batteries in this condition suffer early failure from battery sulfation, premature capacity loss (PCL) and grid corrosion.

OPzV vs OPzS Battery

OPzV Batteries are sealed maintenance-free batteries working on the VRLA oxygen recombination principle & requires no water topping-up. The vent is sealed with a valve-regulated plug which should not be opened. OPzS batteries are similar in basic construction using tubular plates however the electrolyte is flooded. The cell container has a vent for topping-up water lost during normal battery operations.

How to charge OPzV battery

Theoretically, the more complete the charge of the OPzV battery, the more completes the chemical reaction between the electrolyte and the plate in the battery. When all available active substances in the battery have been converted, the battery is in a fully charged state. The key point of valve regulated lead-acid battery maintenance is to ensure the charging effect of the battery and establish an effective charging method for OPzV battery.

If the charging voltage is too high, the charging current will increase, and the generated gas is greater than the recombination efficiency, which will cause the battery water loss.

If the charging voltage is too low, the negative lead plate will be sulfated, the charging receiving capacity will be reduced, and the capacity will be attenuated. It is easy to appear a single backward OPzV battery, resulting in voltage difference and affecting the service life of the battery. What kind of charging voltage should we use?

1) Floating charge

The optimal ambient temperature of an OPzV battery is 5 ~ 30 ℃, and the battery is usually in a floating charge operation state. The room is equipped with an air conditioner to keep the ambient temperature at 20 ℃, and the floating charging voltage of the battery is 2.23v/each battery at 20 ℃. If the battery is operated under the ambient temperature below 20 ℃ for a long time, the temperature compensation coefficient is usually ± 3mV per degree centigrade. That is, when the temperature is low, the floating charge voltage is increased; when the temperature is high, the floating charge voltage is reduced.

2) Equalizing charge

When the battery runs for a long time, it is found that the voltage drop of an individual battery is too large (for example, the floating charge voltage measurement is less than 1.8V), it is necessary to adopt the method of balanced charging to adjust. At the same time, periodic equalizing charging can ensure that the OPzV battery is in a fully charged state and prolong the service life of the battery. In addition, it is suggested to charge the battery every 6 months for about 10 hours, and the average charging voltage is 2.35v/OPzV battery.

The charging method of the OPzV battery also affects the service life of the battery. By mastering the performance characteristics of the OPzV battery, users can control the charging voltage to charge the battery according to different ambient temperature conditions. The most important thing is that the maintenance and charging of the OPzV battery must be carried out by professionals. Non professionals should not touch the battery at will. Daily use must comply with the requirements of OPzV battery and charging equipment. Protective equipment (mask, goggles, gloves, etc.) should be used when working with the OPzV battery or near the battery.

How to maintain OPzV battery?

OPzV battery is designed with a colloidal electrolyte and a tubular positive plate. It has the advantages of a wet battery (Maintenance free) and dry battery (Long cycle life), which is especially suitable for the backup time of 1 to 20 hours. Because it is not limited by the user environment or maintenance conditions, the OPzV battery is suitable for the environment with large temperature differences and unstable power grid, or renewable energy storage system in a long-term electrical state. For example, the off-grid wind power system, because Wind Power is considered highly intermittent in many areas (e.g. monsoon area). It needs to use an OPzV battery which can be deeply cycled.

OPzV battery is different from a normal lead-acid battery. Because many people leak of know enough about OPzV battery, there are some problems such as insufficient maintenance and unable to master the battery capacity.

Principle and characteristics of OPzV battery

The charge discharge reaction mode of an OPzV battery is the same as that of an ordinary lead-acid battery, which is converted into electric energy by chemical energy. The difference between the OPzV battery and the ordinary lead-acid battery is that the OPzV battery uses colloidal electrolyte and tubular plate. Its maintenance free and long-life characteristics are realized through the control of the chemical reaction.

Suggestions on operation and maintenance of OPzV battery

1. Clean the battery regularly to keep the battery clean.

2. Regularly check whether the battery shell is damaged, whether the safety valve is clamped in place, and whether the electrolyte leaks.

3. Check the total floating charge voltage of the battery pack once a month and adjust it in time if there is any difference from the standard.

4. Check the floating charging voltage of a single battery once a month and record it.

5. Use an infrared thermometer to check the surface temperature of the battery once a month and record it.

6. Check whether the connection parts are loose once a year and fasten them in time.

In some scenarios, the floating charge voltage of the OPzV battery is in a floating charge state for a long time. Due to the uneven distribution of every single cell and other reasons, the floating charge voltage of single cell gradually forms deviation in the use process. This deviation leads to different degrees of sulfation of the backward negative plate of the battery, which affects the discharge capacity of the whole battery. The solution suggested by Spaceflight Power is that the OPzV battery pack needs to be balanced and changed regularly, so as to reduce the degree of sulfation and increase the service life of the battery.

In conclusion, Spaceflight Power has 26 years of experience in manufacturing lead-acid batteries. There are 12 automatic production chains in the factory workshop. The quality of OPzV batteries produced by Spaceflight Power is stable and very popular in the market. Although OPzV has the characteristics of long life and maintenance free, proper maintenance can make the service life longer.

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