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Date / Time: 11/7/2009 3:49 AM UTC
We love machine exactly how laptop battery lithium batteries and maintenance will be right? This problem has plagued many loyal cell phone users, packet Including me. In checking some of the information, recently had the opportunity to consult a professional in an electrochemical Ph.D. and a domestic knowledge Name of the battery, deputy director of the Institute. Now a number of recently acquired knowledge and experience in writing, to satisfy the reader of you.
Lithium-ion battery cathode material of lithium active compounds are usually composed of negative electrode is a special molecular structure of carbon. Common The cathode material mainly composed of LiCoO2, charging, added to the battery positive pole of the electric potential to force the release of compounds from lithium Son, embedded negative elements arranged in lamellar structure of the carbon. Discharge, lithium-ion from the lamellar structure of carbon in precipitation, re - And the combination of positive compounds. INSPIRON 2600 Lithium-ion movement generated a current.
Although the chemical reaction principle is very simple, but in the actual industrial production, the practical problems need to be considered much more: Cathode material additives required to maintain the multiple charge-discharge activity, the negative electrode material, which needs to design the molecular structure of class to accommodate the More lithium ion; fill in the electrolyte between the positive and negative electrodes, in addition to maintaining stability, but also need to have good electrical conductivity, reducing the Battery internal resistance.
Although the lithium-ion batteries little nickel-cadmium battery memory effect, memory effect of the principle is that crystallization, in lithium batteries for several Peace will not produce such a response. However, lithium-ion battery capacity after repeated charge-discharge will continue to decline, its causes are complex and multi - Like. Is mainly positive and negative changes in the material itself, from the molecular level, the positive and negative electrodes on the capacity of 312-0292 lithium-ion hole structure will Progressive collapse, plug; from the chemical point of view, is the active anode material is passive, there to form a stable of other side effects of Adduct. Physics will appear on the cathode material gradually falling off, etc., in short, ultimately reduce the battery charge and discharge can be free to The process of moving the number of lithium-ion.
Over-charging and over-discharge, lithium-ion batteries will be positive and negative result in permanent damage, from the molecular level, intuitive Understanding, over-discharge of carbon anode will lead to excessive release of lithium ion and makes it appear lamellar structure collapsed, over-charging will Too many negative electrode of lithium ion into the carbon structure of a hard go, causing some of the lithium-ion can no longer be released. This is the lithium - Why do ion batteries are usually equipped with charge and discharge control circuit causes.
Not suitable for the temperature, will lead to Inspiron 2200 lithium-ion battery inside the reaction of other chemical compounds that we do not want to see, the To the lithium-ion batteries in a number of positive and negative with the protection of temperature between the diaphragm or electrolyte additives. In the battery temperature to a Given circumstances, the composite membrane electrolyte membrane hole closed or degeneration, increased battery internal resistance until the circuit, the battery is no longer to heat up, to ensure that Charge the battery temperature is normal.
And deep charge-discharge lithium-ion batteries can improve the actual capacity? Experts clearly told me that this is meaningless. They Even said that the so-called three full charge-discharge prior to use of "activation" in the knowledge of both of them, Dr. Lane, do not understand this as a Necessary. Why do so many people, however, after the deep charge-discharge capacity of Battery Information Lane marking will occur change? After Surface will be referred to.
Inspiron 1000 Lithium-ion batteries are generally with the management of chip and charge control chips. Which management chip in a series of registers, There is capacity, temperature, ID, charge status, discharge frequency values. These values are in use will gradually change. I am a People think that the use of instructions in the "Use a month or so should put a full-charge" approach is that the main role should be amended These registers where the wrong value, making the battery charge control and the nominal capacity of the battery match the actual situation.
Charge control the main control chip, the battery charging process. Lithium-ion battery charging process is divided into two phases, constant-current fast Filling stage (when the battery indicator light yellow) and constant-voltage current decreasing phase (the battery indicator light flashes green. Constant Current Fast Charge Stage, the battery voltage gradually rises to the standard battery voltage, and subsequently transferred under constant pressure phase control chip, voltage is no longer l High to ensure that no over-charge, current battery, along with the rising gradually weakened to 0, and the ultimate TD347 completion of charging.
Statistics chip power consumption by recording the discharge curve (voltage, current, time) can calculate the sample battery power, which Is what we read in the Battery Information inside wh. Value. The lithium-ion batteries in repeated use, discharge Qu Line will change, if the chip has not been opportunity to once again read out a complete discharge curve, its calculated capacity is also Is not accurate. So we need to deep charge-discharge to calibrate the battery chips.
Finally, I right battery maintenance view is:
1. No need to ensure that every time a re-release END electric charge;
2. A period of time to do a protection circuit placed under the control of deep-charge battery power to amend the statistics, but it does not improve The actual capacity of your battery.
3. A long time without the KD476 battery, should be placed in the shade in order to weaken its internal self-passivation reaction speed.
4. Protection circuit is also able to monitor the battery self-discharge, long-term without the battery should be charging to a certain degree of power to prevent the battery Self-discharge during storage in the discharge of excessive lead to excessive damage.
In fact, there is not much to take into account the battery use of attention, in other words is taken into account is not much use. Can use a battery How many times, perhaps more from the battery itself, differences in the manufacture of individual differences, rather than use. Choose a good Mobile phone brand reputation is undoubtedly the future long-life battery one of the guarantees.
Now that the vast majority of electronic products, such as digital cameras, mobile phones, portable computers and so uses a lithium battery, so I make re-explain the principles of such batteries. Currently the mainstream notebook batteries are used, and the most widely used is a lithium-ion (Li-ion) batteries. The reason is lithium (Li) in use at the same time more dangerous, we all know that lithium is a more active metal element, use less secure, we often see charging when burning, bursting. The lithium-ion battery (Li-ion) added element lithium can inhibit the active ingredient, which is the alternative to lithium batteries, and its possession of the anode used to suck the carbon-lithium-ion, discharge, lithium into lithium-ion, from the the battery anode, GD761 lithium-ion battery cathode reached. Charging, the cathode of lithium atoms into the lithium-ion and electron ionization, and the lithium-ion to the anode movement and electronic synthesis of lithium atoms. Discharge, the lithium atoms from the graphite anode surface of the crystal into a lithium-ion and electron ionization, and the synthesis of lithium atoms at the cathode. Therefore, in the lithium batteries with lithium-ion form forever appear, there will not be the form of lithium metal, of course, will not appear combustion, explosion and other dangers. Lithium ion moves between the anode and cathode, the electrode itself does not change. This is the lithium-ion batteries and lithium batteries is essentially the difference. So that lithium really a safe, efficient, convenient, while the older Lithium-Ion battery also will be eliminated. They distinguish between the method is quite simple: from the battery label will be able to identify the identity of lithium as Li, while the lithium-ion battery for Li-ion. Now, laptops and cell phones using the so-called lithium, in fact, lithium-ion battery. Lithium-ion batteries with other batteries can not match advantage: working voltage is high; small size, light weight, energy is high; safe and fast charging; allows a wide temperature range; discharge current is small, no memory effect, no pollution, etc., these decisions its presence in the mainstream notebook batteries. Of course, Inspiron E1505 lithium-ion batteries also have their own deficiencies, that is, high prices can not be charging a small number of fast charging, with no interchangeability of batteries, voltage changes, discharge rate of large, rapid decline in capacity can not be high-current discharge. Therefore, the current battery is, and can not find a class of perfect solution, even if the lithium-ion battery can only be relative terms it is more beneficial to move some of the advantages inherent in Bale.
With regard to the use of lithium batteries, simply speaking three aspects:
First of all, lithium batteries do not need extraordinary time charge to activate, you can not do so would have meant charging circuit protection, plug is also useless
Secondly, the activation of lithium batteries (in fact, correct charging curve) generally appear in the first use for a long time to place, any use, or that the charge that is frequently used for some time, the methodology is a complete charge and discharge, after which the battery can be that with the charge, and only in the long run is only necessary for the use of full charge and discharge once again re-calibration
Finally, the Inspiron 6400 lithium battery life is mainly reflected in the charge-discharge cycles, this cycle is an absolute concept, for example, if you last used the 30% electricity, full of electricity, the next time the use of 70% of electricity, but also full of electricity, the happens to be a charge cycle, rather than two, so those who like to make a rechargeable battery the player himself aggregate it, do in fact accelerated the end of battery life
Detailed instructions, read the full text and pictures. . .
Explain the charge cycle:
The source of some misunderstanding
Every time this is the exhaustion of the battery re-charging the battery comes from the ancient NICD, this nickel-cadmium batteries have memory effect, if the letting go to make electricity, the battery will increase the number of times with the use of showing fewer and fewer of the state power Later, the NIMH batteries, in fact, has no obvious memory effect, but it still needs a complete charge and discharge current to maintain its normal capacity shows that it is some Japanese Ni-MH charger offers the principle of refresh functions The lithium batteries there was virtually no memory effect, of course, after prolonged usage charge curves there was still a little inaccurate, Apple provides a simple ical Inspiron 8600 prompts you to charge and discharge the battery from time to time for the correction, but does not require very high frequency. With regard to activation, newly manufactured lithium batteries need to be achieved in a number of the best condition after use, this is true, but the use of 10 hours of activation is absolutely no need (and does not make sense) is now charging circuits are taken into account user convenience, the battery will automatically cut off after full charging circuit, so you can sleep at ease is not, at this time could not get plugged in fact there is no distinction between Turning to the habit of charging 10 hours, this is from the old nicd or nimh batteries, etc. Talking about the slow charge mode, as the original battery charging circuit design behind the general in order to maintain battery temperature normal and to prevent battery damage , are used in small current charging mode is slow, and this circuit under normal circumstances do not have the power to determine an accurate function, so users are recommended 14-16 hours of charging this way, take a look at the error will generally be in 2,3 hours, if the charging current is too large, over-charge the battery will cause serious harm to Later, and now for the nimh lithium 8N544 battery fast charging circuit, already has a very good power detection, you can use pulsed high-current fast charging, and can maintain the battery in the normal temperature range, but to near when the full power quickly in order to prevent overcharge, the circuit from the high-current pulse is converted to a gradual narrowing of the trickle charge, so even if the full power-up detection of some deviation, due to the closer full electric current is smaller, at the last moment charge current is close to 0, no damage to the battery, and this is why that 80% of pre-charge lithium batteries 1 hour can be completed, and full of the last 20% of the electricity have to 4 hours of the reasons for
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