subject: How to use laptop batteriey(2) [print this page] How to use laptop batteriey(2) How to use laptop batteriey(2)
Out the error of repeated charge and discharge depth
With the original notebook computer batteries , after use over time there will inevitably be the case standby time . Some users said: "The depth with repeated charge-discharge method , you can restore the battery performance , thereby extending battery life ,Dell Vostro 1510 Battery, Dell Winbook N4 Battery, Dell Winbook Z1 Battery, Dell XPS M1210 Battery, " I believe that this relatively one-sided .
To understand this issue correctly , may start using the laptop battery types talk about . We all know that before 1995 the production of notebook computers are basically used nickel-cadmium battery. This battery , when used, if the discharge is not the right way , the battery will have a " memory effect " , thereby reducing the battery 's actual capacity , eliminate the "memory effect " is used repeatedly the best way to approach the depth of discharge . With the emergence of nickel-metal hydride batteries , battery capacity has improved significantly , but the " memory effect " did not completely eliminate the shortcomings .
In recent years, lithium-ion batteryIn notebook computers has been rapid popularity due to lithium-ion batteries have basically eliminated the " memory effect "problem , so the depth with repeated charge and discharge method to restore the battery no longer apply. But lithium-ion battery capacity reduction occurs , Dell Winbook N4 Battery, or why the problem? The root causes of that situation, it is used in notebook computers and Yuanzhuang Li -ion battery built-in battery management system caused .
Battery Management :Currently in notebook computers , almost all adopted the " battery management "and" charge and discharge control " of two chip-level management system. The " battery management chip " inside the computer placed in notebooks , the chip registers in the computer storage forward to the Taiwan Li-ion battery capacity , operating temperature , ID series number , charge and discharge, charge and discharge Leijicishuo other important information. The data information in the course of the need to constantly refresh the actual situation . The battery built-in " charge and discharge control chip , " the most important role is to monitor and control the battery charge and discharge the entire process and be documented.
Charge :Lithium -ion battery charging process of the whole , divided into " fast charge constant current "and" reduced charge constant current " two phases. The so-called " constant current fast charge "means the charge in the beginning , the charge current constant while the charge voltage to follow the battery voltage increased gradually until it reaches the nominal voltage of the charging . When the battery voltage has reached the standard value, the control chip will automatically turn into " reduced charge constant current "phase , this time charging voltage will no longer continue to rise , while the charge current to follow the battery capacity is increasing gradually decreasing And eventually reach zero , so it completed the full battery charging .
At the same time , the charge generated during the charging voltage , current and time data curve , will be recorded in the battery 's " charge and discharge control chip " in the memory. " Battery Management " is through the retrieval of the data , Dell Vostro 1510 Battery, Dell Winbook N4 Battery, Dell Winbook Z1 Battery, Dell XPS M1210 Battery, calculated by sampling data such as battery capacity , which is what we read in the Battery Information in the value of Wh .
Fixed:After several charge and discharge the battery after use , its built-in chip in the charge and discharge data will of course change. If at this time , " Battery Management " has no opportunity to read the newer, more complete data , it calculated battery capacity would of course not accurate , and give the user the impression that the battery capacity has decreased, but the fact that The actual capacity of the battery does not really reduce . Dell Vostro 1510 Battery, Some brands of notebook computers comes with charging management software works is in the process of charging refresh " charge and discharge control chip " memory in the data , thus ensuring " battery management chips , " the results are correct.
If you carefully look at the notebook computer for use, will find them , " one month after the use of computers should be on the battery for a full charge and discharge operation " instructions. Its main purpose is to use the depth of charge and discharge means to modify the charge and discharge control of the chip registers in the curve of the data , so that the battery charge control and battery nominal capacity and consistent with the actual situation , which reached the correct battery capacity values .
