2010年11月29日星期一
Lithium-ion batteries working
The array central a laptop is lithium-ion, which agency that its electrodes (the conductors in a ambit that affix non-metal parts) are fabricated of lithium and carbon. The absolute cathode is fabricated of lithium azure oxide, which emits absolute lithium ions; the abrogating anode is fabricated of carbon. The electrodes are placed in a gel electrolyte, a actual that conducts electricity, and afar by a area of perforated plastic. If recharging a dell 6400 battery, the lithium ions move from the cathode to the anode and actualize an electric abeyant aberration (a voltage of about 3.7 volts), according to www.HowStuffWorks.com. If the array is discharging, the lithium ions move aback from the anode to the cathode. Total acquittal occurs if the acknowledgment of ions to the cathode decreases the voltage to zero. A lithium-ion array that is absolutely absolved will be unusable, though, so these batteries accept a failsafe apparatus that shuts them down afore they acquittal too much.
This system, which itself is a baby computer absorbed to the array pack, monitors the charging levels and temperature of the array to anticipate alarming usage. This adviser uses power, which is one of the affidavit that a array not in use will still lose allegation and acquaintance a abatement in voltage over time. This is how batteries can become broke even after use.
To prolong array life, do not acquiesce your laptop array to cesspool all the way to 10 percent or lower after after charging it. Contrary to accepted belief, there is no allegation to absolutely discharge, or "deep discharge," a laptop array or any added affectionate of battery, including those in corpuscle phones and iPods, anniversary time it is used. In addition, lithium-ion batteries can handle hundreds of again cycles of charging and discharging. The alone accessible issue, therefore, is not the action of charging, but the aliment of a minimum voltage. If a array goes to aught voltage, it will no best be able to recharge, and the alone band-aid is to buy a new one.
From the moment lithium-ion batteries are manufactured, they consistently abase and lose charge, so a laptop array will alone endure two to three years, behindhand of usage. Make abiding to analysis the accomplishment date if you buy a new battery. An bare array that has been sitting about is just as base as one that has been in use for the aforementioned bulk of time. Calefaction will aswell abase lithium-ion batteries faster than normal. According to Accepted Science magazine, analytical temperatures for a laptop array action about 70 degrees Fahrenheit. Storing a lithium-ion array at temperatures at or aloft this akin will abase it added quickly. HP pavilllion battery.
Lithium is a actual acknowledging element, abnormally compared to advance and nickel, which are what car batteries (lead-acid batteries) and cyberbanking toy batteries (nickel-cadmium) about contain. Hence, lithium-ion batteries can abundance a lot added activity than archetypal batteries — about 150 watt-hours per kilogram of battery, according to HowStuffWorks.com. However, back lithium-ion batteries accept so abundant energy, they aswell balmy up bound from the calefaction broadcast during discharge. If the array becomes too hot, it releases the polymer gel, which can be afire by calefaction or a spark. This agitation is what causes some laptop batteries to bolt fire.
2010年10月12日星期二
Care for Laptop Batteries
Lithium Ion album batteries chafe down because of two factors: 1) animate accepting in your album arrangement and 2) acclimatized crumbling of the album battery. Both will chafe down your album arrangement over time; the ambuscade is to abridge their appulse while still accepting the accomplishment out of your laptop arrangement that you need.
The a lot of important activity to acquire about laptop batteries is that they are consistently blow a babyish bit of their charge. The hotter the temperature, the faster album batteries afar their charge. So adage bulk one is: accrue your album arrangement cool. Album arrangement manufacturers affluence their online writing at about 60F. (It doesn't admonition to put them in the refrigerator, and you can blow a arrangement by freezing it.)
The added a lot of important activity to acquire about album batteries is dell 6400 battery that their adaptation decreases with ceremony aeon of charging and absolution (or usage). By itself, this is not hasty - but if accumulated with the anterior point, it leads to a hasty conclusion.
When laptop users leave their laptop arrangement axial the accoutrement but leave the computer acquainted into the wall, the laptop arrangement is traveling through a affiliated charge-discharge cycle. The album arrangement is sitting bald axial the notebook, absolution a little faster than acclimatized because of the notebook's heat. Once its accusation affiliated drops to a agreed affiliated (which is adapted for ceremony manufacturer), the AC adapter provides added abstruse to "top off" the album battery. As the laptop arrangement gets older, it tends to self-discharge a little faster, which accelerates the activity even further.
Lithium ion album batteries frequently activity 600 to 800 charge/discharge cycles over 1.5 to 3 years of advantageous life. If you use your album arrangement as declared above, you are needlessly appliance your accession of recharges.
One added note: abounding bodies anamnesis that beforehand album batteries on ancient computers formed best if they were in fact absolved afore accepting recharged. While that charcoal authentic for Nickel Cadmium technology, today's Lithium Ion album batteries plan best if they are recharged if they still acquire 10 to 20% adaptation remaining. So if you are appliance your album arrangement on a connected flight, try not to get in the addiction of appliance the album arrangement until it has about no charge. Your laptop arrangement in fact won't be the above if you re-charge it the next time.
