Laptop battery tips: out repeatedly charge and discharge depth of the misunderstanding

The laptop is equipped with the original battery, after a period of time after use, there will inevitably be the case of standby time. Some users think: "depth with repeated charge-discharge method, be able to resume the performance of the battery, thereby extending the battery life", I believe that this relatively one-sided.

We must correctly understand the issue, may start using the laptop sony laptop battery types talking about. As we all know, in 1995, previously produced in the laptop, basically to use nickel-cadmium batteries to power. This battery, when used, if the charge-discharge mode is not correct, the battery will have a "memory effect", thereby reducing the battery's actual capacity, the elimination of this "memory effect" is the best way to repeatedly charge and discharge depth manner.

With the emergence of nickel-hydrogen batteries, battery capacity has been significantly improved, but the "memory effect" did not completely eliminate the disadvantage. In recent years, lithium-ion sony pcga-bp1n in the laptop has been rapidly increasing, largely because of lithium-ion batteries have been eliminated after the "memory effect" problem, it is used repeatedly to restore the depth of the battery charge and discharge performance of the method is not applied.

But why lithium-ion battery capacity or the will to reduce the problem? Generate the root causes of this situation, are used in laptop and the original lithium-ion battery in the built-in battery management systems. Battery Management: At present in the laptop, almost all adopted the "sony pcga-bp2nx management" and "charge-discharge control" of two chip-level management systems. The "battery management chip" placed in the internal laptop, the chip registers in memory of the computer used in lithium-ion battery capacity, temperature, ID serial number, charge-discharge state, the cumulative number of charge-discharge and other important information. Information in the use of these data, the need to constantly refresh the actual situation.

The battery built-in "charge-discharge control chip" the most important function, that is, surveillance, control of battery charge and discharge the entire process and be documented. Charge: Lithium-ion sony pcga-bp2r throughout the charging process is divided into "fast charge constant-current" and "Constant current charge decreasing" in two stages. The so-called "constant current fast charge" means just started charging, the charge current and charge voltage to follow a fixed battery terminal voltage gradually increased until they reach their nominal voltage of the charging method. When the battery terminal voltage has reached the standard value, the control chip will be automatically transferred to the "constant current charging regressive" stage, when the charging voltage will no longer continue to rise, while the charge current to follow the battery capacity is rising gradually diminishing, and eventually reach zero, so they completed the full battery charging process.

At the same time, in the charge generated by the process of charging voltage, current and time data curves will be recorded in the sony pcga-bp2s 's "charge-discharge control chip" of memory. "Battery management chip" is through access to these data, and calculated by sampling data such as battery capacity, it is our Battery Information in numerical Wh read.

Fixed: After repeated charging and discharging the sony pcga-bp2t,sony pcga-bp2v,sony vgp-bps8 after use, its built-chip charge-discharge data will of course be changed. If at this time "battery management chip" has not the opportunity to read newer, more complete data, it calculated the battery capacity of course will not be accurate to the user the feeling seems to be reducing the capacity of the battery, and the fact that on the actual battery capacity has not really reduced.

Some brands of laptop charging management software comes with the working principle, is in charge during refresh "charge-discharge control chip" memory of the data, thus ensuring the "battery management chips," the correctness of calculations. If you have a close look of the laptop using the instructions will be found to have "a month in the use of computer time, should make a full battery charge and discharge operation" note. Its main purpose is to use the depth of charge and discharge the way to amend the charge and discharge control chip register data in the curve, so that the battery charge control and sony pcga-bp71 ,sony vgp-bps3,sony vgp-bps5 nominal capacity and the actual situation, as a result the correct value of the battery capacity.