subject: the right to charge laptop battery? [print this page] the right to charge laptop battery? the right to charge laptop battery?
We love machine exactly how lithium batteries and maintenance will be right?
This problem has plagued many loyal users of laptop computers,dell laptop battery including me.
In checking some of the information, recently had the opportunity to consult a professional in an electrochemical Ph.D. and a well-known domestic 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 cathode material for the major components ofLiCoO2, Charging time, added to the battery positive pole of the electric potential to force release of lithium-ion compounds, embedded negative elements arranged in lamellar structure of the carbon. Discharge, lithium-ion from the lamellar structure of carbon precipitation and re-cathode combination of compounds. 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: the 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 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,Dell G5266 Battery Dell Latitude CPi Battery, Dell Inspiron 8200 Battery, memory effect of the principle is that crystallization, in the lithium batteries will have little reaction. However, lithium-ion battery capacity after repeated charge-discharge will continue to decline, its causes are complex and diverse. is mainly positive and negative changes in the material itself, from the molecular level, the positive and negative electrodes of lithium ion on the hole to accommodate the structure will gradually collapse, plug; from the chemical point of view, is the active anode material is passive, there's the other side to form a stable compounds. Physics will appear on the cathode material gradually falling off, etc., in short, can ultimately reduce the battery charging and discharging process of the free movement of 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, excessive discharge of carbon anode will lead to excessive release of lithium-ion and makes it appear lamellar structure collapsed, over - Rechargeable lithium-ion will too hard go into the negative carbon structure, causing some of the lithium-ion can no longer be released. This is why lithium-ion batteries are usually equipped with charge-discharge control circuit causes.
Not suitable for the temperature, will lead to lithium-ion battery inside the reaction of other chemical compounds that we do not want to see, so many of the lithium-ion batteries are being set up between the protective negative temperature-controlled diaphragm or electrolyte additives. In the battery temperature to a certain case, 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 the battery charging temperature is normal.
And deep charge-discharge lithium-ion batteries can improve the actual capacity?
Experts clearly told me that this is meaningless.Dell Latitude CPi Battery, 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 need. Why do so many people, however, Dell G5266 Battery Dell Latitude CPi Battery, Dell Inspiron 8200 Battery,after the deep charge-dischargeBattery InformationLane marked capacity would change it? Will be mentioned later.
Notebook computer 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 personally believe that the instructions for use in notebook computers in the "Use a month should put a full-charge" approach to a major role should be is to fix 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 charge phase (when the battery indicator light yellow) and the 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 then transferred to constant pressure in the control phase of the next chip, the voltage will not rise in order to ensure that no over-charge, current battery, along with the gradual weakening of the increase in to0And finally completed charging.
Statistics chip power consumption by recording the discharge curve (voltage, current, time) can calculate the sample battery power, which is what we in theBattery InformationRead insidewh.Value. The lithium-ion batteries in repeated use, the discharge curve will change, if the chip has not been opportunity to once again read out a complete discharge curve, which is calculated out of electricity that 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 under the control of deep charge-discharge the battery power to amend the statistics,Dell Inspiron 8200 Battery, but it will not improve your battery's actual capacity.
3. A long-term unused batteries, 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,Dell G5266 Battery Dell Latitude CPi Battery, Dell Inspiron 8200 Battery, long-term without the battery should be charging to a certain degree of power to prevent self-discharge of batteries in 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. The number of times a cell can use, and perhaps more from the battery itself, differences in the manufacture of individual differences, rather than use. Choose a good reputation of the notebook PC brand, is undoubtedly the future long-life battery one of the guarantees.
