Notebook battery
Notebook battery is a more important component, its state is directly related to a laptop environment in the absence of power in the ability to work. The batteries in notebook computers is also a serious consumption of parts, so related to notebook computer batteries for the maintenance and rational use issues are also frequently discussed topic. However, some users of some of the maintenance of the understanding is wrong, the following have to do something to explain.
Nickel-metal hydride batteries are now fitted models have basically will not see, the universal application of a lithium-ion batteries. General lithium-ion battery life-cycle of 300 to 500 charge-discharge. But this does not mean that it can rarely use the battery life extension. Original Batteries as a physical work environment factors susceptible to influence, but the main reason leading to cell loss is caused by oxidation of the Sony NP-FM90 Battery internal resistance increases, which is why many users will complain that they are fully charged battery in use why suddenly had no electricity. It may therefore be understood that this problem is that when the end of the battery assembly off the production line, its internal life, the clock will then start walking, even if you do not set aside the battery, it can only be to a certain extent, the loss rate of only delay the battery. However, in other words, if the battery is always resting the side of the meaning of mobile notebook computers talk about?
Lithium-ion battery cathode material is usually formed by a lithium-active compounds, the negative electrode is a special molecular structure of carbon. Common cathode material for the major components of LiCoO2, charging, added to the battery positive pole of the electric potential to force the release of compounds, lithium ion, 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, 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, eventually reducing the battery charge-discharge process can be free to move 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. Therefore, lithium-ion batteries are usually equipped with charge-discharge control circuit.
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 Canon BP-2L12 Battery charging temperature is normal.
And deep charge-discharge lithium-ion batteries can improve the actual capacity? According to experts, the answer, it is meaningless. Experts even say that the so-called three full charge-discharge prior to use of "activation" in their knowledge of Dr. Lane, do not understand this as a need. Why do so many people, however, after the deep charge-discharge capacity of Battery Information label will occur where a change? 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. 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 now is to fix these registers where the wrong values, 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 constant-voltage current decreasing phase (the battery indicator light flashes green. Constant-current fast charge phase, the battery voltage is gradually increased The standard voltage to the battery, 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 rising gradually weakened to 0, and the ultimate completion of charging.
Statistics chip power consumption by recording the discharge curve (voltage, current, time) can calculate the sample battery power, this is what we read in the Battery Information inside wh. 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. Therefore, the need of deep charge-discharge to calibrate the battery chips.
Proper maintenance of the battery is necessary, so many people have asked how to protect a battery but it will not early on in the lifetime retirement this problem. As the battery life is mainly determined by the number of charge cycles, so to avoid the frequent use of the battery can be said that one of the most fundamental way, that is using the power of the environment, as far as possible not to use battery-powered.
This leads to a question, that is, whether the use of power when the battery removed from the machine, it is indeed an issue people a headache. However, the high charge state and the high temperature accelerated the decline in battery capacity. I now invite all Let's imagine that if you do not remove the battery, notebook computers because of the role of charging protection circuit, so that the battery be maintained at 95-100% of the high charge state at a time when the battery in which the ambient temperature at least 30 ° c so, if it is hot weather, the temperature will be higher, so the stability of the AC power supply, we should try to remove the battery using computers. If you intend a long time do not use batteries, battery charge to 40% should be placed in a cool place after the save. If the battery is fully charged, will be placed at high temperatures, so that the battery will cause great damage. Because, charging 100% in the 60 ° c environmental conservation, 3 months after the battery capacity has dropped by 40%. Set aside for the preservation of the battery should be at least a month will be used once the battery Zhuangshang Qu, recharged, so to avoid loss of activity of ion battery.
Similarly, dust and moisture also acts as a battery-killer role, they will destroy the battery circuit board and accelerate the oxidation of the internal battery, so for those long-term preservation of the battery, you can put on a layer of thin films to low-grade dust and moisture infringement.
In addition, lithium batteries how should a reasonable charge and discharge it? As the lithium-ion Canon BP-2L13 Battery that can power a small memory effect is negligible, so charging it halfway through the injury is not too great, and its fear most is the excessive discharge (full discharge). Lithium-ion batteries often the result of excessive low discharge the battery can only be scrapped in advance, such as those bios discharge, discharge procedures, and even connected to the discharge light bulb is the best way to see no alternative but to not try. So for lithium-ion batteries need not wait until the 0% recharge.
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