digital batteries

With the popularity of high frequency switching power supply, valve lead acid batteries have been widely used in the power system. Because of its completely sealed, no need to add water to maintain previously known as “maintenance free” battery. That maintenance “free” is a misleading term, which allows the user to relax on the valve regulated lead daily maintenance of battery acid and management, which reduces Laptop battery capacity and lesions early due to lack of battery capacity, or failure in substations and power generation plant accidents were frequent. Therefore, the proper use and care dimensional lead-acid battery VRLA battery to increase their service life is of great importance.

Affecting a major valve battery life

The normal life valve lead acid batteries for over 10 years, in theory, may be 20 years but in actual use often insufficient capacity, failure or early phenomenon. Affect the life of valve lead acid batteries of many factors, including:

1, the ambient temperature

The battery at 25 ℃ environment, availability of a longer life. Temperature, the battery will exacerbate corrosion of the plates at the same time will consume more water, thus reducing battery life, long term operating temperature if higher than 10 ℃, life is about halfway. Valve lead-acid IBM ThinkPad R51 battery changes in capacity with changes in temperature, 25 ℃ when the battery has a capacity of 100% at above 25 ℃, 10 ℃ for each increase in battery capacity would be halved .

Must be careful to do according to actual temperature changes to streamline construction lead-discharge battery acid present, while a battery compartment of the right to control the temperature kept at 22 ℃ ~ 25 ℃ or less.

2 overload

The long-term overload state, the cathode due to the reaction of oxygen evolution, the water is consumed, H + increase, which increases the acidity and near the cathode, the grid corrosion accelerated, causing thinning of the accelerated corrosion of the grid battery, battery capacity reduced, the same time due to water loss intensified, would have drained the danger of the Dell Inspiron 1501 battery, affecting the battery life.

3, an excessive discharge of

Excessive battery discharge occurred mainly in the AC power outage, the battery time to load. When the battery runs down its on-voltage is too low or zero, this will lead to a large number of sulfuric acid inside the battery lead is adsorbed on the surface of the cathode of battery, resulting in the cathode Battery “sulfate.” Lead sulphate is an insulator, its formation is related to the battery charge and discharge performance, have a tremendous negative impact, and therefore the formation of sulphate in the cathode, the higher the greater the internal resistance of batteries, the battery charge and discharge performance, the worse the shorter the lifespan of the battery.

4, the conditions of low discharge current, the impact of

In the discharge current small formed under the particle size of lead sulfate as the conditions of the large discharge current, the size requirements of mainstream higher than the rate of formation of crystals smaller than current conditions, slow the growth of crystals too late to be oxidized very rapidly reduced, and thus a relatively smaller size, whereas in conditions of low current, a crystal of lead sulfate great can be easily restored. Such that crystals of lead sulfate is not a long-term cleanup, will certainly affect the hp 338794-001 battery capacity and longevity. Therefore, the actual expense of the current battery capacity must be executed under a precise calculation.

5, the unbalanced nature of the impact of charge-discharge

The study results showed: composition of the grid alloy and structure in different parts of the distribution is different, leading to the unbalanced nature of the electrochemical properties grid [2], the imbalance is to turn in the float and the load condition of discharge voltage are different, and will be in charge and discharge cycle, so that this difference is increasing and training the so-called “rear battery (battery failure).” The current domestic standards in a group of toshiba PA3191U-2BRS battery float voltage difference between the largest to be ≤ 50mV, the norm in developed countries are ≤ 20mV, should pay attention to the battery and reduce floating state operating voltage differences.

6, thermal runaway phenomenon

As the use of depleted fluid valve regulated lead acid battery design, the infusion of battery electrolyte are adsorbed on the fiber glass, when the load current increases, it is necessary to leave the gas valve, which causes the loss of farm water resistance by significant volume reduction of the charge and discharge large amounts of heat generated in the process, which propagate the heat that the temperature has been taken too late, they will form a thermal runaway. Thermal runaway causes are not promptly reduced float voltage, lax safety valve or pressure valve is open too low, etc. In severe cases of thermal runaway if the landfill has the potential DIP apple A1008 battery voltage transient and Sustainable Housing battery temperature rose to 70 ℃ ~ 80 ℃, and therefore thermal runaway must be a high level of attention.

7, long-term impact of floating charge

Float charging status of battery in the long term, pricing and not the discharge is required to cause passivation of the anode of the battery flat, so that the battery internal resistance increases, the capacity is severely reduced, resulting a shortened life of the battery.

Second, improve the life of valve lead acid battery of measures

With this purpose the life valve lead-acid batteries of factor analysis to improve the life of valve lead acid batteries, we must do:

1 battery of stringent quality levels. In selecting the battery and the process of procurement, we must fully understand the production process manufacturer, manufacturing process and quality control, as well as specifications and so on, if necessary, require manufacturers to conduct the first in the capacity of experiments to screen a difference smaller IBM ThinkPad T40 battery.

A reasonable choice charger. Since the food was monitored over real time and intelligent management capabilities, allowing the battery sealed in the best condition always work, so use high quality switching power supply as a charging unit. High frequency switching power supply system, adopting modular design, when a module is a failure, should be able to immediately withdraw from the race does not affect the normal operation of other modules, module parts should be able AutoFill that batteries are not due to failures caused by excessive discharge module.

With lithium ion battery technology continues to update and develop their light weight, high capacity, long life benefits of gradually consumers. A expanded its market from the phone to the camera, DVD, model aircraft, toys and many other areas. In recent years, lithium-ion batteries in power tools, backup power, electric bicycles, light electric vehicles and other heavy equipment for the purpose of increasing concern, but these devices require batteries to high capacity conditions of high power. Lithium-ion Laptop battery can meet the high security, high power, long life basic requirements, is one of many experts and researchers to explore an important issue.

Power-lithium-ion refers generally to the security of the battery due to misuse of power, malfunction, accidents and abuse cause swelling of the battery drain, temperature and pressure the standard, or even explosion and fire incidents, where a user lives and property are threatened. Explosion and fire incidents are the most serious security. Lithium-ion IBM 40Y6799 battery fire of abuse led to an explosion of internal reasons are complex, but most are caused by temperature and high pressure, both of which can be attributed to the cause of most lithium-ion battery reaction thermal runaway, that is, fever. The fever typically include: the electrodes of batteries SEI film decomposition, built-in lithium and the reaction solvent, the decomposition reaction of the cathode material and so on.

Cathode material of lithium manganese oxide is the main advantage of large

In the Food Lithium-ion battery safety issues, the electrode material of the cathode material is the key, but also leads to lithium-ion battery of the main reasons for potential safety issues. Seeking high energy density, high security, environmental protection and Dell Inspiron E1705 battery power affordable materials for electrodes is the key to development. Currently widely used cathode materials are cobalt oxide, lithium, lithium manganese, nickel, cobalt, lithium and lithium iron phosphate, manganese. Data obtained on the point of domestic and international order, the lithium-cobalt may be able to enhance security are not usually used as cathode materials, battery power, the use of lithium manganese oxide is relatively common, cobalt-nickel-manganese lithium household less in China Taiwan and Japan, some manufacturers.

As the manganese rich in natural resources (especially in China, the world’s third largest reserves), low-cost, environmentally friendly, manganese oxide and lithium with a high voltage discharge, proven techniques, Security is good, with a layered structure of cathode material for the other can be compared to support broadband, the discharge capacity, etc., which is currently in the development of lithium-powered batteries, oxide manganese lithium has a great advantage. Although the specific capacity is relatively low, but the larger hp Pavilion dv6 battery power itself does not constitute a material weakness. Cathode materials in lithium manganese oxide for lithium-ion battery has assembled a very good safety and thermal stability. But when there is capacity Lithium Manganese fading fast cycle (especially in high temperature conditions), the short life of a disadvantage, hampering the process actually used.

Lithium cobalt nickel manganese than the benefits of high capacity, excellent cycling performance. Made of Lithium-ion sony vgp-bps5a battery has a very high specific energy, suitable for severe restrictions on weight and size but need high-energy areas. As the use of cobalt, nickel and other metals, nickel and cobalt after the price of lithium manganese oxide lithium cobalt. However, the current nickel-cobalt Applications lithium-manganese can still be assessed on the national implementation of the field is the path through the doped to improve its safety performance, but do not see the magnitude of demand.

Lithium iron phosphate has a rich source of raw materials, low price, high specific capacity and excellent performance at high temperature cycle characteristics and high safety, etc., are very promising battery cathode material power. Lithium iron phosphate toshiba PA3285U-3BRS battery power as a new cathode material for use in the last years of warming. Because of constraint problems patent in Europe and North America can be mass produced in the lithium iron phosphate with small manufacturers, the market fundamentals have been monopolized by a few suppliers. Although the number of local manufacturers of lithium-ion pairs of Energy Research of the lithium iron phosphate and development put into production, but due to technical differences in the processes and quality products mixed.

Additives, electrolyte Security

Power Lithium-ion battery design also affects the safety of the battery.

Only manufacturers in the report positive and negative, the type of binding, membrane assembly process is extremely ear types and welding, packaging forms, by calculating and careful monitoring to make a pole piece within the current allocation is reasonable, the polarization of the apple PowerBook G4 15 inch battery is low, heat Good and effective security. For security reasons, supply batteries are usually designed to take into account when an exception occurs, the system battery, the rate of heat transfer to the environment if the system is greater than the speed of heat, because it determines the probability of a thermal runaway reaction.

To further improve the security of battery power, many manufacturers in the electrolyte of the battery of functional additives. These additives are anti-overload and anti-air, improve the low temperature and the flame retarding effect. It is worth mentioning that the fire is added to the electrolyte to improve battery power as an important direction for security. The purpose of the addition of flame retardants is to increase the index of electrolyte fuel oxygen. As we all know where the material, the oxygen index of more than 27 hours are fireproof material, the current development of flame retardants have been close to or reach that goal. For the electrolyte of the TravelMate 290 battery supply, in the opinion of the individual functional additive in the development of indicators is not difficult, the challenge is to ensure the safety of the electrolyte must be balanced, while conventional performance. Electrolyte to balance the various functions, several functional groups, research additive is composed of research and development directions.

Necessary to protect the plate

To enhance the safety of lithium-ion battery power, the shield is equipped with facilities necessary for the battery. In most cases, welfare committee lithium should have control over working conditions use lithium-ion autonomy to these working conditions, including voltage, current temperature, and thus on. Given the special nature of the use of lithium-ion Dell Y9943 battery, making power lithium-board ion battery protection must be used with matching to ensure the safety and reliability of the entire system. Multi-multi-channel and the adequacy of the Assembly battery, long-term use in the process, necessarily there are individual differences, the protection board (or management system of the battery) to be responsible for the whole group of the battery voltage, current and temperature, and even the ability to monitor, you must obtain accurate and quick action to fully play its role. At the same time, due to the battery performance of individual differences in the same charge and discharge voltage of each cell and the available capacity will be different, with the cycles increased, the difference in battery performance become increasingly important, and would therefore significantly reduce performance of the battery life any shorter. To make the performance of the battery at or near the level of single cell performance must be weighed against the hp PB995A battery so the battery loading and unloading in the degradation of performance unique in the extent reduced to a minimum. Most manufacturers have adopted a balanced plate pricing protection of lithium-ion batteries for maintenance.

Thus, in lithium-ion batteries power the safety factors, the electrode materials is critical, is currently able to guarantee the implementation of industry standard materials to test the system for only one oxide manganese lithium iron phosphate lithium. Manufacturers commonly used in good safety performance and compatibility of electrolyte additives to protect the impetus for greater use of lithium-ion battery. In addition, lithium-ion shield provides a protective function of lithium batteries, can maximize the protection of the safe and reliable power to battery use. Charge equalization ensures that the practical lithium-ion battery to power high-security long working life. From the trend of the future power lithium-ion batteries, protective panels and special equipment for the joint development of the three is a scientific development.

In the new energy vehicle development in countries and regions around the world have been based on their assessment of different options, research the appropriate technology and Laptop battery development and to encourage support for taking a different strategy. In the current situation as a whole, Japan and the United States and Europe has focused on lithium batteries and fuel cells, but our country to take into account the resources and the maturity of technologies, the accent newly released policies on the promotion of nickel-hydride batteries in metal.

Ni-MH battery to become the object of political support China’s current

In our letter of the Department of June 25, the “new energy automotive manufacturing companies and the rules of access management products,” the vehicle, according to new energy vehicles, systems and key deadlines assembly technology, the degree of IBM ThinkPad R51 battery perfection of the national and industry standards, and industrial degree of difference will be divided into initial phase where the development period, three different stages of maturity of the technology and give Management classified.

According to state regulators, the home-products only in the production of small volumes, and only in approved areas, scope, duration and conditions of model runs, and the operational status of all products for real-time monitoring, product development phase allows the mass production only the approved area, scope, duration and conditions of sale, use, and at least 20% of sales of products running in the real-time monitoring, mature products and conventional products for the Dell Inspiron 1300 battery automobile, “the automakers and ad management product even in the sale and use of the same products with conventional automotive .

This means that in China, December 31, 2010, equipped with lithium batteries and hybrid electric vehicles will be limited to the sale and use areas, use nickel-metal hydride battery and hybrid electric vehicles can be sold and used across the country.

Experts believe that the reason why countries are now central to the development of lithium nickel-hydride batteries, metal, the main reason is that the nickel-hydride technology of metals of the hp PB992A battery is more mature than the Lithium, the most abundant mineral resources, the future of new energy vehicles will track better access to the advertising phase.

“Ni-MH – Lithium-Ion battery – fuel cell,” Industrialization Path

In the three commonly used types of car batteries, batteries lead acid to cause serious pollution of the environment has long been out of the consumer applications, nickel-metal hydride batteries, although the marketing of the integrating the moment, but key indicators of laboratory data were lower than lithium batteries, and the theory Basically, there is no room for; lithium despite superior performance, but still can not be guaranteed safety and the relatively high costs have also affected its business.

Experts predict that the new energy vehicles will be in the “Ni-MH – Lithium-Ion sony VGP-BPS5 battery- fuel cell” industry-oriented development path. From the trend of development and rates, and short-term performance can be achieved only with nickel-hydrogen batteries, nickel-hydride technology of metal drums since the most mature in the next three years, will remain the mainstream new energy vehicles, followed by nickel-hydride technology of metals of the lithium and iron phosphate, hydrogen fuel cells, one third of the world, 5-lithium year and will gradually replaced by fuel cells. Battery giant Panasonic and Sanyo also found that lithium-ion battery can be replaced within 2 ~ 3 years, nickel-hydrogen batteries, mainly due to cheaper nickel-safe hydrogen batteries, has reached high production wide. Lithium batteries also need to continue to research topics such as security, so take time business.

According to economic analysis of Japan Fuji mainstream nickel-metal hydride batteries will be able to continue until 2011, but after 2011, Li-ion toshiba PA3465U-1BRS battery will gradually erode the market share of nickel-hydride batteries, metal The agency predicted in 2009 car-use nickel-metal hydride rechargeable batteries in the world market size than the previous year by 23.7% to ¥ 92,000,000,000, but the 2015 Ni-MH rechargeable battery-vehicle market will be reduced to ¥ 55,000,000,000.

Market demand for nickel-hydrogen batteries to save 2-3 years of rapid growth in

Nickel-technology hydrogen fuel cell, and the industry chain to determine their maturity will be a period of time with the coexistence of lithium batteries, lithium iron phosphate cathode material for lithium batteries allows the emergence of performance and cost advantage has been achieved, but stable, production capacity and lack of effective management of the lack of apple A1175 battery testing continues to be a part of the new energy discourage automobile manufacturers, however, batteries nickel Hydrogen-crossed many years of fighting, technical and industrial chains are quite perfect, in a short period of time can form a stable vehicle support capabilities, and therefore can still be a period of time in vehicles new energy and widely applicable.

According to industry estimates, the market for nickel-hydrogen cell is still expected to get 2-3 years of rapid growth over the next 2-3 years, “10 City 1000″ program, the growing popularity of hybrid cars and export markets overseas for nickel and other factors make hydrogen market demand from the Aspire 3000 battery to strong growth, and when the nickel-hydride batteries, metal and batteries Lithium is still Nanfenbozhong when the nickel-hydrogen batteries will usher in a short period of rapid growth.

Among them, China has launched a “10 City, 1000″ How to get the first batch of nickel demand hydrogen battery market. It is estimated that in “10 City, 1000″ program, about 3200-4000 vehicles, new energy vehicles (including buses and cars) using Chinese-made nickel-hydrogen batteries in three years , bringing a total of about 3.5-4.4 one million kilowatts-hour nickel-hydrogen , VGP-BPS2C needs.

Together, both domestic demand and exports weakened in 2012 after the nickel-hydrogen batteries are gradually replaced by lithium batteries.

Maintaining the pace of R & D policy

In the production of automotive Dell U4873 battery business in China with a production capacity of nickel-hydrogen batteries have represented the majority of companies, including Chunlan Group, Ke-Li Yuan, the Torch High Technology, Hunan Shenzhou share Kane etc., which Chunlan Group is the nickel-metal hydride HEV battery power technology, leading market shares in a leading position in the Torch High Technology and Hunan Shenzhou possessed a certain amount of technical base and position market.

As for the lithium battery, most domestic manufacturers are not capable of mass production, but the planning of the corresponding production has been implemented, it is expected after 2010 are capable of mass production .

Experts believe that technological advances, prices for cars in China and business related to the IBM ThinkPad X60 battery in addition to promoting the industrialization of nickel-hydride batteries, metal, more attention should be some of long term, to devote resources to research and lithium battery development, and maintaining fuel cell monitoring techniques to fill a broader energy market new car is ready.

Lithium-ion battery in 2-3 years, although difficult to replace the nickel-hydrogen batteries, however, not to ignore is the future of lithium batteries replace nickel-hydride batteries in the metal abreast of new energy vehicles. From a global viewpoint, Japan is the international motor current energy news and research cell power and application of more advanced countries, Japan has big businesses in automotive and HSTNN-LB31 battery has invested in building lithium-ion power line battery production, concentrated in the 2010-2011 production. Fuji economy as lithium-ion battery will begin in 2011 to gradually replace nickel-hydride batteries, metal, lithium-ion battery, as no doubt the future of consumer technology path.

Today, Japan In addition to switch focus on lithium batteries, the Japanese cars in the development of new energy and use, particularly in the development of fuel cell vehicles and promotion, many faster than expected China’s internal. Some years ago the Japanese economy, Trade and Industry on development of vehicle fuel cell law and the promotion of a calendar, its strategic objectives are as follows: In 2010, the Japanese used vehicles fuel cell to reach 50000; in 2020 to 5 million; 2030, year to universal access to cars to fuel cell.