Lead acid batteries vs nickel cadmium,restoring a laptop battery life gsmarena,battery baby cars video - Test Out

03.12.2015
Safelec ltd specialise in the segregation and disposal of all types of Batteries with the most common being Alkaline househoulds, 6v Lantern’s, Lead Acid and Ni Cad.
RISK WARNING Investments listed on the Cleantech Investor Platform (provided by Envestors Limited which is authorised and regulated by the Financial Conduct Authority (FCA) in the United Kingdom) carry risks as well as potential rewards. Lead Acid battery cells consist of a lead (Pb) electrode and a lead oxide (PbO2) electrode immersed in a solution of water and sulfuric acid (H2SO4). Common examples of lead acid batteries are car batteries, alarm system backup batteries, and camcorder batteries. No more than six months, varies by temperature (longer at non-freezing low temperatures, shorter at high temperatures). They must not be completely discharged and should be charged immediately after use, or the life will be shortened considerably.
These batteries pose a significant danger should leakage occur, as the electrolyte used in lead-acid batteries is sulfuric acid. The Nickel-Metal Hydride (NiMH) battery was introduced as another option to the Nickel-Cadmium batteries.
NiMH batteries can be recycled by dropping them off at any of our over 7,200 stores nationwide.Should be recycled through your local RadioShack store. Batteries may contain toxic, corrosive and environmentally harmful components and should therefore be properly segregated for collection and recycling. We can offer on-site battery bins and containers as well as a collection service to suit your requirements. All of our Battery collections are complete with Environment Agency approved Consignment notes for audit purposes. Copyright Cleantech Investor 2009by Denis GrossPrimary BatteriesPrimary batteries are non-rechargeable. If you require further details regarding the transaction data, please contact the supplier directly. When the battery is connected to a load, the lead combines with the sulfuric acid to create lead sulfate (PbSO4), and the lead oxide combines with hydrogen and sulfuric acid to create lead sulfate and water (H2O). Lead acid batteries should never be fully discharged; this will effectively kill the battery, making it impossible to charge. Charging should be done in a well-ventilated area, being careful to avoid an electrical discharge that could ignite the oxygen or hydrogen gas. Like Ni-Cds, NiMH batteries are available in the standard cylindrical sizes (AA, AAA, etc.). The Waste Batteries and Accumulators Regulations 2009 require an increasing proportion of portable batteries placed on the UK market to be collected for recycling. In terms of volume, they account for somewhere in the region of 90% of all batteries in the world – mainly small, disposable batteries for consumer use.


As the battery discharges, the lead sulfate builds up on the electrodes, and the water builds up in the sulfuric acid solution. They differ from Ni-Cds, however, in that they are capable of a higher capacity without developing what is often referred to as the Ni-Cd Memory Issue. The main difference between these two battery types is the substitution of a metal hydride instead of cadmium. It also prohibits waste industrial and automotive batteries from going to landfill or incinerator. When the battery is charged, the process reverses, with the lead sulfate combining with water to build up lead and lead oxide on the electrodes. Additional information and a more detailed cutaway view are available by clicking on the image. The battery is normally mounted on racks and is continuously charged except for intermittent discharging intervals of varying times and power. Rechargeable battery types, although accounting for only some 10% of all batteries by volume, represent more than 60% of the global battery market in terms of value. The number of times a battery can be recharged depends upon the material used in its manufacture. Statistics from the Laboratoire de Reactivite et de Chimie des Solides show that, in value terms, the rechargeable battery market accounts for 63% of the total market, around $19 billion of a total market valued at $30 billion. In the next few paragraphs the types of plates and grid alloys for the lead acid and alkaline (Ni­Cad), the electrolyte properties, battery charging, battery safety and finally battery maintenance will be covered. The non-rechargeable battery market (90% of the market in volume terms) is valued at $21 billion – or 37% of the total value.
Lead-acid battery constructionFor the lead acid battery, the positive plates a vailable are: the pasted (F aure) plate which comprises of a latticework metallic grid with the openings filled with lead oxide paste. Within the rechargeable market, transportation is the most important application in value terms, accounting for almost half of the total (see chart).
The grid may be made up of lead antimony or lead calcium, the properties of which will be given later .The second type is the multitubular plates, which use porous plates to contain the lead o xide.
Applications include the automotive industry and other forms of transport such as ships and aircraft. The grid (lead antimony) is basically a row of spines extending from the top bar to the bottom cap bar. The positive plate consists of a grid (lead antimony) of large area with thin layers of lead oxide. When the electrodes are connected via an external circuit, the lead anode dissociates into lead cations and electrons.
The grid of alloys, antimony or calcium, serves both purposes gives physical support and strength to the soft lead and acts as an electric conductor.The grid achieves and retains a physical shape and conducts the current to all parts of the material.


At the cathode the arriving electrons combine with the lead dioxide cathode and hydrogen cations in the electrolyte to produce more lead cations and water. Pasted plates with lead calcium alloy grids are used in sealed maintenance free lead acid cells due to the fact that this type does not require watering during its life time.Lead antimony is preferred for installations where elevated temperature and frequent cycling is encountered.
The lead cations generated associate with the dilute sulphate ions to produce lead sulphate.Thus the electrodes dissolve as the battery discharges, with the sulphuric acid electrolyte becoming lead sulphate. Lead calcium is also used for installations requiring longer intervals between maintenance watering.
Water must then be added to the battery to replace the lost hydrogen.•    Acid stratification, where the concentration of the electrolyte becomes unevenly distributed within the cell. This can be rectified by overcharging, causing gassing that mixes the electrolyte, or by using a dedicated mixing system. The first is inefficient and the second requires an additional power source for the mixer.These problems can be resolved by using valve-regulated lead-acid (VRLA) or sealed lead-acid (SLA) cells. They differ from the flooded type in that the electrolyte is immobilised (eliminating stratification) and they are fitted with a valve to regulate pressure, effectively sealing the cell (eliminating the need to add water). However, the technology can be combined with advanced battery monitoring systems and these batteries are appropriate for the automotive industry.Lithium batteriesLithium-ion (Li-ion) chemistry is currently one of the most popular battery chemistries used to power consumer electronics. This type of rechargeable battery is widely used in cameras, laptop computers, handheld computers and a host of portable electronic devices. There are also efforts under way to extend this technology to electric vehicles and even stationary applications.The attractiveness of lithium-ion batteries stems from a very high energy-to-weight ratio, the slow loss of charge when idle, and no memory loss. Li-ion batteries most widely used to date employ graphite anodes and lithium cobalt oxide cathodes, and these have been prone to overheating and even exploding. Valence incorporates iron and manganese with the phosphate with encouraging results in terms of high specific energy and power, a long cycle life, low environmental impact and enhanced safety. The advances in lithium-ion technology put this battery type in the frame for electric vehicles and transportation applications. Valence batteries, for example, have been deployed in Segway personal transporters and Smith electric vehicles.A123 Systems, headquarted in Watertown, Massachusetts, with high power Li-ion phosphate batteries based on new nanoscale materials initially developed at MIT, claims significant performance advantages over alternative high power technologies. We publish, we share and we spread the knowledge.You're welcome to read, write and contribute to EEP in any way!



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