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Batteries

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Duramp - Valve Regulated Lead Acid Batteries

A newer type of sealed battery uses "Absorbed Glass Mats", or AGM between the plates. These type of batteries have all the advantages of gelled, but can stand much more shock and vibrations since the plates are tightly packed and rigidly mounted. As the mat is about 95% saturated, the battery will not leak acid even if broken. In addition, since here is no liquid to freeze and expand, they are practically immune from freezing damage.

Nearly all AGM batteries are "recombinant" - what that means is that the Oxygen and Hydrogen recombine INSIDE the battery, thus preventing the loss of water through electrolysis. Also, since the internal resistance is extremely low, there is almost no heating of the battery even under heavy charge and discharge currents. Even under severe overcharge conditions hydrogen emission are far below those of standard batteries.AGM's have a very low self-discharge - from 1% to 3% per month is usual. This means that they can sit in storage for much longer periods without charging than standard batteries.

AGM batteries main advantages are no maintenance, completely sealed against fumes, Hydrogen, or leakage, non-spilling even if they are broken, and can survive most freezes.

Applications

Duramp Deep Cycle VRLA sealed batteries are ideally used with Wind Turbines and Photovoltaic applications. These are designed to take the high initial motorized loads without leading to shorter life capacity, while at the same time these have a long life (5-8 years or more). These batteries also provide greater safety and do not require maintenance. They are ideal for use in homes and other indoor applications.

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Product Offering - VRLA Batteries

A newer type of sealed battery uses "Absorbed Glass Mats", or AGM between the plates. These type of batteries have all the advantages of gelled, but can stand much more shock and vibrations since the plates are tightly packed and rigidly mounted. As the mat is about 95% saturated, the battery will not leak acid even if broken. In addition, since there is no liquid to freeze and expand, they are practically immune from freezing damage.

Nearly all AGM batteries are "recombinant" - what that means is that the Oxygen and Hydrogen recombine INSIDE the battery, thus preventing the loss of water through electrolysis. Also, since the internal resistance is extremely low, there is almost no heating of the battery even under heavy charge and discharge currents. Even under severe overcharge conditions hydrogen emission are far below those of standard batteries.AGM's have a very low self-discharge - from 1% to 3% per month is usual. This means that they can sit in storage for much longer periods without charging than standard batteries.

AGM batteries main advantages are no maintenance, completely sealed against fumes, Hydrogen, or leakage, non-spilling even if they are broken, and can survive most freezes.

1. NPC Series – Deep Cycle Battery

Among our AGM type VRLA batteries, the NPC series is a Deep Cycle battery. These batteries are ideal for Wind Turbines and Solar PV applications since they have a design life of >750 cycles at 50% D.O.D. for most of the models. In addition, where batteries are set in an area where fumes or leakage is a worry, a standard or industrial Deep Cycle battery is a better economic choice.

2. GEL Series - Gelled Electrolyte Battery

Gelled batteries, or "Gel Cells" contain acid that has been "gelled" by the addition of Silica Gel. The advantage of these batteries is that it is impossible to spill acid even if they are broken. However, due to this property, the Gel cells, to prevent damage, must be charged at a slower rate than the classical lead-acid batteries. The voltage must also be kept low, as voids can develop in the gel which will never heal, causing a loss in battery capacity.

3. NP Series - Standard Battery

This series is most commonly used for powering uninterrupted electrical source (UPS), Emergency Lights, Electric power system, Alarm system, Solar application system and Medical Equipment. This series can discharge to 50% at most, hence it is used for equipment that requires low capacity power output.

4. FA series - Front Access Battery

The terminals on this battery are in front, and the battery is long and narrow in dimension, making it convenient for customers to load. These batteries are typically used for Telecommunication power system, Switch electrical source, Control equipments and UPS, Emergency electrical sources, etc.

5. STXL Series - Classic Battery

This battery is used with equipment that has a high ampere-hour requirement. It is typically used for systems that have long operation periods, such as Telecommunication Equipment.

Product Features

Maintenance-Free
There is no need to replenish with water, thanks to the unique gas recombination system which totally transforms the generated gas into water.

Gas pressure Venting System
Designed to release excessive gas and reseal automatically in the event gas pressure rises to a level above the normal rate, thus, there is no excessive gas build-up in the battery.

No Free Acid
The special electrolyte retentive separators firmly hold the acid and thus there is no free acid inside the battery, and therefore the battery can be mounted in any position.

Explosion-Proof, Safety
A safety valve prevents the chance of battery explosion and ensures complete safety in normal use.

Inspection
Batteries will be 100% inspected before shipment (Inspecting sealed intensity, inner-resistance, open-circuit voltage and closed-circuit voltage).

Certificate
All series of the products have been awarded CE, UL and ISO9001:2000 certificate.

Chemical Reaction and Sealing Mechanism

Interior Chemical Reaction of the Battery: PbO2 + 2H2SO4 + Pb PbSO4 + 2H2O + PbSO4

At discharge, lead oxide in positive plates and spongy lead in negative plates react with sulfuric acid in the electrolyte and gradually transform into lead sulfate, during which the sulfuric acid concentration decreases. Conversely, when the battery is charged, the positive and negative active materials which has been turned into lead sulfate gradually revert to lead oxide and spongy lead respectively releasing the sulfuric acid absorbed in the active materials, during which the sulfuric acid concentration increases, as shown in Fig.1.

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Discharge Characteristics

The battery capacity is the parameter to scale the output of the battery discharge. The following factors affect the battery capacity: discharge current, discharge temperature, and final discharge voltage.

fig2

 

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