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.