Tuesday, June 2, 2009

Laptop Battery secret

Earlier APPLE, DELL, SONY, HP and other international well-known giant of the notebook PC battery problems have appeared in the original recall? Today I would like to extend the topic to talk about some of the notebook battery knowledge to share with you?

Notebook battery why The more you use less electricity? Why do battery calibration function will power to restore a part of? How to charge the battery correct? All this power from the battery of the method for calculating the start … …

Whether it has been out of the nickel-metal hydride HP Pavilion ZT3000 batteries, now used in lithium-ion battery, or not commonly lithium polymer batteries, and even Future Star of the silver zinc batteries, are equivalent to the power of a storage warehouse, is the difference between them and out of the way the Treasury, the volume of stocks it. Notebook computer batteries, as well as those responsible for the management of a big battery - power computing chips, it is the management of battery, computing power, is responsible for charging and discharging of the “responsible person.”

In the measurement of IBM Thinkpad T42 battery technology, a common method of four kinds, but not a different brand of battery books only one way of calculating the power, usually using a combination of methods to one of the main method of calculating , and the remaining auxiliary power calculation means, the management. The first one is the open circuit voltage measurement, this method is by measuring the battery voltage under static values to calculate the remaining battery capacity, but as a result of stationary lithium-ion battery voltage and remaining capacity at the relationship between belonging to non-linear, Thus the measured value of this method is not accurate, the vast majority of mobile phone batteries are calculated using this method; the second is called Coulomb calculation, the method is by measuring the battery charge and discharge current, the current value and time value After the calculation of product integration has been carried out by filling the battery into the power and the release of electricity, Coulomb’s method is a more accurate method of calculating power; The third is the impedance measurement, IBM ThinkPad T60 Battery by measuring its resistance to be within the remaining battery capacity value; the fourth is a comprehensive look-up table method, by setting up a related form, the voltage, current, temperature and other parameters, you can query the remaining battery capacity.

Therefore, in addition to the internal structure of the battery batteries, there are management chip, chip which contains 1-2 kinds of batteries power measurement method of calculation, and a charge-discharge protection circuit. Laptop is in the system, and through access to the chip-driven interface, and then set on the battery management.

So, why the battery will become less and less power consumption, but implementation of the battery calibration function to restore a part of the capacity it can? hp pavilion Dv6000 Notebook battery 6-cell so-called General Electric, 4-core power, means that there are a number of battery cell batteries. So many batteries together, the more electricity is used the less fundamental reasons: batteries and the batteries between the quality of discharge can not be exactly the same level, such as discharge, the batteries which power a substantial reduction in In order to maintain voltage stability, the battery management chip will be in accordance with the “bucket principle”, according to the worst charge that the protection of core power, so after the electricity charge will decrease even more than the impact of irreversible cell of Chemical Physics change.

hp pavilion ZD7000 battery  calibration function is to balance the multiple batteries, the battery internal resistance as a result of their own can not be completely consistent, the internal resistance of a large battery will shoulder a greater current, leading to their own consumption more than any other battery, but also more wear and tear, so regular battery calibration is necessary - this can balance the burden of multiple batteries by “work”, thereby extending the overall life expectancy

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