The msendur ii batteries referenced in this document are stationary, leadacid batteries. Panasonics tough valve regulated lead acid rechargeable batteries are designed to provide outstanding performance in withstanding overcharge, overdischarge, and resisting vibration and shock. Advantages of valve regulated lead acid vrla batteries. A valve regulated lead acid battery vrla battery is a type of lead acid battery characterized by a limited amount of electrolyte starved electrolyte absorbed. The purpose of the requirements contained in this afman is to assure the most reliable system possible with vrla batteries. They are also commonly known as sealed batteries or maintenancefree batteries. The maintenancefree valve regulated lead acid vrla construction makes discover standard agm series batteries the definitive choice for broadband and cable tv catv, uninterruptible power supplies ups, telecommunications, and electronics and security applications. There are different types of leadacid batteries, including vented designs and maintenancefree valveregulated leadacid batteries. Introduction to vrla valveregulated leadacid or vrla, including gel and agm absorbed glass mat battery designs, can be substituted in virtually any flooded leadacid battery. This recommended practice is limited to maintenance, test schedules, and testing procedures that can be used to optimize the life and performance of valve regulated lead acid vrla batteries for stationary applications. Leadacid batteries do not burn, or burn with difficulty. Hbl is the largest manufacturer of specialized batteries in india, for industrial, telecom, railways and defence applications. Valve regulated leadacid batteries do produce hydrogen and oxygen during operation. The lead acid battery works well at cold temperatures and is superior to lithiumion when operating in subzero conditions.
Vrla valveregulated leadacid, also known as sealed or maintenancefree flooded, also called vented or open vrla batteries vrla batteries are sealed and can be mounted in any orientation. Valve regulated lead acid batteries typical applications. Extinguish fire with agent suitable for surrounding combustible materials. Refrain from eating, drinking or smoking in work areas. Methods of charging the valveregulated leadacid battery. This is especially true during charging and discharging. Thermal runaway of valve regulated leadacid vrla batteries. Vrla stands for valve regulated lead acid, which means that the batteries are sealed. Component maintenance manual lt valveregulated leadacid. Request pdf valveregulated leadacid batteries for many decades, the leadacid battery has been the most widely used energystorage device for medium and large. Valveregulated leadacid batteries for many decades, the leadacid battery has been the most widely used energystorage device for mediumand largescale applications approximately 100wh and above. Valveregulated leadacid or vrla, including gel and agm absorbed glass mat battery designs, can be substituted in virtually any flooded leadacid battery application in conjunction with wellregulated charging. Cool exterior of battery if exposed to fire to prevent rupture. Performance of valveregulated leadacid batteries in realworld.
Individual data sheet this information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty w ith respect to any cells and batteries. In this study, the effect of temperature on the electrochemical behaviors of gel electrolyte systems was investigated for valve regulated leadacid battery at 0. It also provides guidance to determine when batteries should be replaced. Gas will escape through the safety valves only in case of overcharging. Valveregulated leadacid vrla technology encompasses both gelled electrolyte and absorbed glass mat agm batteries.
Valveregulated lead acid vrla gsyuasa energy solutions. Valve regulated sealed lead acid batteries the vrla battery is the most popular reserve power design because the electrolyte is captive, preventing it from spilling even when the case is punctured. Concerns about vrla batteries generally center on two issues. The osha pel for dust is 15 mgm3 as total dust or 5 mgm3 as respirable dust. P1188 recommended practice for maintenance, testing, and replacement of valveregulated leadacid vrla batteries for stationary applications this recommended practice is limited to maintenance, test schedules, and testing procedures that can be used to optimize the life and performance of valveregulated leadacid vrla batteries for. Many of the failures are associated with the positive plate, i. Td14800, revision nc or later faa approved revisions. Valve regulated lead acid battery discover battery. Telecommunications mobile phone stations btsstations offgridongrid solutions trafficsyset ms signalling lighting similar to the illustration security lighting. Introduction to vrla valve regulated lead acid or vrla, including gel and agm absorbed glass mat battery designs, can be substituted in virtually any flooded lead acid battery application in conjunction with well regulated charging.
Vrla batteries are relatively new to the market and they have exhibited different aging and failure modes than tra. Valve regulated lead acid vrla batteries are popularly termed as maintenance free lead acid batteries. More than a decade ago, east penn began building valveregulated batteries using tried and true technology backed by more than. Both are sealed valveregulated svr also called valveregulated leadacid vrla. Valveregulated leadacid batteries kindle edition by moseley, patrick t. Guide to vrla batteries 1927 east penn manufacturing. Valveregulated leadacid vrla east penn manufacturing. Ups battery handbook the main characteristics of ups. Installation, commissioning and operating instructions. Vrla batteries are relatively new to the market and they have exhibited different aging and failure modes than traditional vented batteries. Valve regulated lead acid vrla batteries news about. Absorbed glass mat battery designs, can be substituted in virtually any flooded leadacid battery. Valve regulated lead acid aircraft batteries by teledyne battery products on the outer package or marked on the battery.
The valveregulated battery a paradigm shift in leadacid technology 1 1. Valve regulated vrla lead acid batteries by storage battery. A valve regulated lead acid battery vrla battery is a type of lead acid battery characterized by a limited amount of electrolyte starved electrolyte absorbed in a plate separator or formed into a gel. The most common type of battery used on ups systems and for backup of telecommunications systems. Technical handbook valveregulated leadacid batteries. Discharge during discharge, the pbo 2 lead dioxide of the. The inspection intervals for these batteries will be the same as outlined in section. In recent years, the traditional, flooded design of the battery has begun to be replaced by an alternative. Do not use water on fires where molten metal is present. Where to recycle your lead acid batteries there are a variety of options available for the recycling of vrla valve regulated lead acid batteries. Methods of charging the valve regulated sealed leadacid. Valveregulated leadacid batteries gives an essential insight into the science that underlies the development and operation of vrla batteries and is a comprehensive reference source for those involved in the practical use of the technology in key energystorage applications. Valveregulated leadacid batteries are maintenance free, safer, office compatible, and have higher volume efficiency than conventional designs.
Material safety data sheet valve regulated lead acid battery, nonspillable us, cn, eu version for international trade protective equipment bunker gear and selfcontained breathing apparatus. Lead acid batteries can be divided into two main classes. Valve regulated lead acid batteries gives an essential insight into the science that underlies the development and operation of vrla batteries and is a comprehensive reference source for those involved in the practical use of the technology in key energystorage applications. Precautions for handling valveregulated leadacid batteries this document should be read in its entirety and its contents fully understood before handling or using panasonic rechargeable valveregulated leadacid batteries. Leadacid batteries a key technology for energy sustainability 1 1.
A cell that is sealed with the exception of a valve that opens to the atmosphere when the internal gas pressure in the cell exceeds atmospheric pressure by a preselected amount. Purchase valveregulated leadacid batteries 1st edition. Valve regulated leadacid vrla battery a leadacid battery in which the internal pressure is regulated by a pressure relief valve and pressure buildup is minimized by internal recombination of gases formed during the charging process. Vrla batteries are considered maintenance free and require no addition of electrolyte or water. A voltage higher than float voltage, applied to a battery to correct the inequalities among battery cells voltage or specific gravity that may develop in service. The change to the socalled valveregulated leadacid vrla technology has not, however, been accomplished without some difficulty. Valve regulated leadacid batteries hoppecke batterien. Failure modes of valveregulated leadacid batteries are discussed and methods are suggested to overcome the problems. Battery products gill 7000 series valveregulated leadacid lt vrla aircraft batteries to ensure continued airworthiness of the batteries. Safety data sheet valve regulated lead acid batteries. Monitoring temperature is important in vrla batteries because they are more sensitive to heat than flooded leadacid batteries and increased temperature can.
Valve regulated leadacid rechargeable batteries conform to the un2800 classification as batteries, wet, nonspillable, and electric storage as a result of passing the vibration and pressure differential test described in d. For optimum life, battery charge voltage should be adjusted with the battery operating temperature. Thermal runaway of valve regulated leadacid vrla batteries, causes and dangers introduction this paper will detail the causes and dangers of vrla battery thermal runaway. Both types are valveregulated and have significant advantages over flooded leadacid products. Methods of charging the valveregulatedleadacid battery. Discover agm series vrla industrial batteries provide superior high integrity and reliability for commercial, industrial, and private applications. Valveregulated leadacid batteries, moseley, patrick t. Valve regulated vrla lead acid batteries by storage.
Valve regulated lead acid battery users manual by storage. Other precautions good personal hygiene and work practices are mandatory. Leadacid batteries have seen relatively wide deployment due to their low cost and relatively long service life, upwards of 15 years, and there are advancements still being made to leadacid battery design, which could enable them to become a more. For valve regulated lead acid batteries electrochemical processes basic theory the following chemical reactions describe the exact transformation which occurs both in the positive and negative plates, due to electrochemical processes.
Each cell in vrla battery will have a value automating operating to allow the gas to escape if developed by the over charging the cells and to hinder the entrance of oxygen from the air. The acid mist and vapors generated by heat or fire are corrosive. Unless involved in recycling operations, do not breach the casing or empty the contents of the battery. Their unique features and benefits deliver an ideal solution for many applications where. Material safety data sheet valve regulated lead acid battery, nonspillable us, cn, eu version for international trade.
They are constructed with an absorbent glass mat agm and are characterized as valve regulated leadacid vrla. Safety data sheet valve regulated lead acid battery, nonspillable handling. Valve regulated lead acid batteries 20 to 200 ampere hours. Lead acid battery an overview sciencedirect topics. Agm batteries and gel batteries are both considered acidstarved. Ieee std 11882005 ieee recommended practice for maintenance, testing, and replacement of valveregulated leadacid batteries for stationary applications. There may be increasing risk of electric shock from strings of connected batteries. Valveregulated leadacid batteries for stationary applications.
Thoroughly wash hands, face, neck and arms, before eating, drinking and smoking. Component maintenance manual ltvalveregulated leadacid. Simple classification of lead acid batteries by type sealed lead acid sla or vrla group batteries, also known as maintenance free batteries, are sealed with a pressure release valve, which limits the escape of gas to above the release pressure. Party responsible for furnishing th e vrla batteries. Vrla batteries are designed to be maintenance free and the hydrogen that is emitted is recombined internally so that the. Compact, these batteries save installation space, while providing full and reliable power. Gelled electrolytes prepared from fumed silica for use in absorptive glass mat valve regulated lead acid agm vrla batteries and the effect of veratraldehyde addition on the electrochemical. More specifically, the document provides the user with guidance in the preparation of his purchasing. Use features like bookmarks, note taking and highlighting while reading valveregulated leadacid batteries. Agm series vrla industrial batteries provide superior high integrity and reliability for. Valveregulated leadacid or vrla, including gel and agm. In a gel battery, the electrolyte does not flow like a normal liquid.
Dec 10, 2014 the valve regulated lead acid vrla battery is a type of rechargeable battery. Batteries should be stored under roof for protection against adverse weather conditions. Request pdf valveregulated leadacid batteries for many decades, the leadacid battery has been the most widely used energystorage device for. In the previous revision of this recommended practice, the discharge rate for the timeadjustment method was adjusted for temperature before conducting the test. Valve regulated leadacid batteries typical applications. The vrla battery is the most popular reserve power design because the electrolyte is captive, preventing it from spilling even when the case is punctured. Identification product identifier other means of identification recommended use recommended restrictions safety data sheet valve regulated lead acid battery nonspillable lead acid battery, sealed lead acid battery. Ieee recommended practice for maintenance, testing, and replacement of valveregulated lead acid vrla batteries for stationary applications i e e e 3 park avenue new york, ny100165997, usa 8 february 2006 ieee power engineering society sponsored by the stationary battery committee. Valveregulated lead acid vrla vrla stands for valveregulated leadacid and is the designation for lowmaintenance leadacid rechargeable batteries. Valve regulated lead acid aircraft batteries by teledyne battery products valveregulated leadacid batteries 3. Recommended practice for maintenance, testing and replacement of valve regulated leadacid vrla batteries for stationary applications.
Float agm battery block tank formed leadtincalcium plates deliver. The tsoc173c173a authorized batteries are listed in teledyne battery products document no. Peters e a csiro, division of minerals, po box 124, port. Experience has demonstrated forcibly the fundamental differences between the two systems, and the lead acid battery manufacturing industry has faced major challenges in investing the. Valve regulated lead acid batteries 20 to 200 ampere hours lead acid battery theory of operation discharge and charging reactions the lead acid battery is a truly unique device an assembly of the active materials of a lead dioxide pbo 2 positive plate, sulfuric acid h 2so 4 electrolyte and a sponge porous lead pb negative plate. Storage battery systems valve regulated lead acid and agm batteries are classified as nonspillable and have been. Because of their construction, vrla batteries do not require regular addition of water to the cells. The 7000 series lt valve regulated lead acid ltvrla batteries are designed with an optimum lead alloy with tin and copper to provide the best possible electrode characteristics necessary for performance. Pdf valve regulated lead acid batteries vrla 6v and. Vrla cells provide a means for recombination of internally generated. Valveregulated lead acid batteries technical handbook 0304.
Valveregulated leadacid vrla batteries request pdf. The maintenancefree valve regulated lead acid vrla construction makes discover standard agm series batteries the definitive choice for broadband and cable tv catv. A vrla battery requires no maintenance of the liquid level which is. Vrla batteries page 2 august 2003 precautions for handling valveregulated leadacid batteries this document should be read in its entirety and its contents fully understood before handling or using panasonic rechargeable valveregulated leadacid batteries. These ltvrla batteries contain electrolyte absorbed in glassmat separators, eferred to as sealed or recombinantgas. Valve regulated lead acid battery vrla use a patented mfx alloy for the positive grid, which exhibits excellent deep discharge performance. J download it once and read it on your kindle device, pc, phones or tablets. Valve regulated leadacid storage batteries for stationary applications. Battery design n east penns vrla features and benefits n east penns quality assurance checks iv. Valveregulated leadacid batteries 1st edition elsevier. Hence the term valve regulated lead acid, or vrla for short.
Valve regulated lead acid battery, nonspillable additional information batteries are housed in polypropylene cases which are regulated as total dust or respirable dust only when they are ground up during recycling. These lt vrla batteries contain electrolyte absorbed in glassmat separators, with no free electrolyte and. If there are any questions, please contact panasonic. Ieee recommended practice for maintenance, testing, and. The electrolyte has the consistency and appearance of petroleum jelly. Pdf valve regulated lead acid batteries vrla 6v and 12v. Combining the two formulae one can therefore obtain. See figure 1, for state of charge at various voltages. Failure modes of valveregulated leadacid batteries in. The 7000 series lt valveregulated leadacid ltvrla batteries are designed with an optimum lead alloy with tin and copper to provide the best possible electrode characteristics necessary for performance. Valveregulated leadacid batteries request pdf researchgate.