Laptop battery specialist

In addition to the notebook processing power by the people's attention, there is an indicator of considerable concern to users, and that is battery life. In addition to Chinese consumers for carrying a notebook, more importantly, it does not need to be limited by the power, do not have to need a long "tail", in the absence of an external power supply can also be occasions to use as usual, so the battery for users It is a very sensitive thing, if put in a notebook around, but no battery power, and that scales with a weight belt is no different. Therefore, to understand their own laptop battery life is the time users on the occasion of the imminent and urgent need to avoid the use of the IBM 40Y6795 Battery, IBM 40Y6791 Battery , IBM 02K6576 Battery,
IBM 08K8183 Battery when it "strikes". In this regard, what should we be more "authority" to detect the use of battery time? Nanbu Cheng us with a stopwatch to time? In fact, there is special software on the battery life for more objective assessment, for example, Battery Mark, Battery Eater, MobileMark2002 and so on. To introduce a more authoritative, but also the application of a relatively large number of software testing battery Battery Mark and the use of attention should be paid.

First of all, let us together find out the Battery Mark principle of it. In fact, Battery Mark use the built-in Graphics engine, Processor engine, Disk engine, Think engine, 4 engines to simulate the actual operation of the battery power consumption. 4 passage of the engine cycle between the non-stop operation of the simulation environment for users to a comprehensive IBM 08K8184 Battery, IBM 40Y7001 Battery, IBM 73H9952 Battery of tests to the specific situation. Every 2 to 3 minutes to test the software will automatically save the data to a specific directory below. When the battery will run out to complete, automatic shutdown before the last save as a result of the test will be the end result.

(Small knowledge: Graphics engine simulation multimedia notebook during the course of the operation. Processor engine is simulated in the notebook IBM 02K6616 Battery, IBM 02K6601 Battery, IBM 40Y6799 Battery in high-load environment. Disk engine simulation of actual use of them working hard. Think engine in practice simulation in a notebook idle state Environment.)

Usage

Some of the software to understand the basic situation, then let us take a look at how to operate the set.

Run the premise is that we have to charge the notebook's IBM 40Y6797 Battery , IBM FRU 92P0998 Battery, IBM FRU 02K6513 Battery, IBM ASM 08K8192 Battery to full power, then the system shut down a number of related management systems, which shut down the specific needs, see below.

First of all, should close the screen saver, if the screen open procedure, the test process, there may be a matter of time and activate the screen saver. Right-click on the desktop, choose "Properties" and "Screen Saver" page to screen selected as the program "(no)", then "application."

Click on the next page in the lower right corner of the "Power" button, be able to enter the power management, power scheme will be following all the items are changed to "never."

Switch to the "warning" page will be "less IBM ThinkPad R30 Battery , IBM ThinkPad 770 Battery, ThinkPad T20 Series Battery, ThinkPad A30 Series Battery, ThinkPad R32 Series Battery alarm" and "a serious shortage of battery alarm" two Duigou are removed.

Switch to the "dormancy" of the page to see the "start dormant" in front of check whether there are (now the vast majority of notebooks will be able to activate dormant features of the system) and, if so, will remove the hook. Then click "OK", this has been shut down power management.

Battery Mark because of the Graphics engine needs to show some full-screen graphics, and some sub-standard screen resolution of 1024X768 resolution, the first adjustment will be mandatory for 1024X768, if more than 1024X768 resolution would not have had. Also due toDell 1691P Battery , Dell M5701 Battery, Dell 1X793 BatteryMark in full-screen display and in the middle between the switch and the task bar will have a negative impact, it is best to the task bar at the top of the total removal of the option.

All of the above are Windows power management bring their own set of procedures, some of the larger manufacturers will have its own dedicated power management procedures, the basic substance of the same, as long as the above, in accordance with the principles of setting it. (Of course, the above is set for the media for the evaluation, as individuals in the test of time, manufacturers can use its own allocation of special procedures, the test of time the Dell HD438 Battery, Dell D5318 Battery, Dell F5136 Battery, Dell 312-0393 Battery, Dell 310-5351 Battery will be a little bit long)After a of settings above, basically there is no need to set up the other, then we can run the Battery Mark (the beginning of the procedure ¡ú ¡ú Ziff Davis Media BenchMarks ¡ú Ziff Davis Media Battery Mark 4.0.1), but we do not have to be anxious Disconnect the power supply, because there are behind the "long" things to look at it.

First of all we see is the screen License. At this point the page on the "Proceed" for the gray can not click, we simply rolled on the right side of the scroll bar at the bottom, "Proceed" button will automatically become availableDell 312-0435 Battery , Dell Latitude X1 Battery, Dell Inspiron 9100 Battery, Dell Inspiron 300M Battery Then the software will be prompted to fill in with the names of organizations, here we can not fill, do not care.

Following the confirmation page, click "OK" on it.

After "a lot of hard work", has finally seen the "truth." That just spent a long time ago and have only a little more than the beginning. Here are a few options:

1.Run (test)

2.Save results (save the test results)

3.Compare results (results of the comparison)

4.Help (help)

Click Run, software, hardware platform will be tested to see if it meets the requirements, if not you can not continue to run Dell Inspiron 2500 Battery, Dell Inspiron 630m Battery, Dell Inspiron 1300 Battery Mark. (Black mark in line with the machines that test the minimum requirements; yellow X machines, although that did not meet the minimum requirements, but also can finish the whole test; red X machines were unable to finish the whole test.)

According to the "next step" will show that the so-called Battery Mark minimum configuration requirements.

"The next step," there is a full page of English here, Battery Mark will once again stressed the resolution as well as the adjustment of the taskbar to hide the problem. At the bottom of the test is needed to install the font what the requirements are generally No missing fonts (not the lack of fonts).

You Dianfan feel, is an interface in the top of our concern is not specified. In order to avoid the testing process by the impact of other procedures, Inspiron 500m Series Battery, Inspiron 700m Series Battery , Inspiron 1100 Series Battery, Inspiron 2600 Series Battery ,
Latitude X300 Series Battery Mark will automatically detect the program is running, side by side, if the yellow X, will not have an impact.

Then this page has suggested that if the software runs on Windows Me system, the first ME "system restore" feature off, or will affect the test.

Zhongyu Ao under this end, than the feeling of the Long March was also hard at this point "to complete" could be the beginning of the test (if it happened in front of a red X, will complete the button is gray.).

Fainted, was to deceive the feelings of the software. This is a test page Presario 1200 Battery
, Presario 1800T Battery , Presario 2100 Series Battery , Presario 2500 Series Battery Mark and machine power management procedures compatible Continue at the beginning of testing. (As the old models for the power management compatibility, Battery Mark for a dedicated power management compatibility less)

If the point of no big changes (only the bottom), 60 seconds after the emergence of Retry with the Cancel option at this time we should be bold by Cancel, will not fall into the cycle of death.

At this point a warning will pop up, suggesting Battery Mark will be no power management of the operation, according to the F3 to continue, according to exit Esc.

F3 test by entering the selection window, where we can choose Conditioning Run and Life Test of two test mode. Conditioning Run full load model, which is called 3 engine: Graphics engine, Processor engine, Disk engine, simulation notebook in a large workload of the state for a long time Presario R3000 Series Battery , Presario X1000 Battery, Presario R4000 Series Battery,
COMPAQ HSTNN-DB02 Battery . Conditioning Run compared with the model, Life Test model with a multi-engine Think engine, the main simulation in the practical application of these notebooks. Under normal circumstances, Life Test mode than Conditioning Run mode for a long time 30% -40%.

Choose to test the project, according to the F3, there will be a warning (Does not have the power management of the test). At this point the power adapter disconnected, and then press F3 to start.

If the wrong selection of test items, the need to withdraw from the case by F3, and then again by confirmation from the F3. Choosing the right to re-test to test (to remember the first first full power).

As for the test of time, depending on the specific model. As measured by the author before the Sony TX, C mode, running a total of more than 4 hours, while the L model run, a night to sleep, wake up the next morning, not run, a full 7 hours. However, under normal circumstances, even if another big-power (or small-capacity COMPAQ 319411-001 Battery, COMPAQ 367759-001 Battery, COMPAQ 116314-001 Battery), have generally come to an hour, so we can go red cup of coffee, look at Bianhe Bian-series, read again, it is estimated that almost nine.

Notes:

1. Life Test in the test, the general is to adjust the screen brightness to 50 (some models in the use of batteries, will automatically reduce the brightness of the screen, this time to go without their adjustment), if the laptop's own Special software can be transferred to the best COMPAQ 337607-002 Battery, COMPAQ 346970-001 Battery, COMPAQ 196345-B21 Battery,
COMPAQ 291694-001 Battery performance mode. And Conditioning Run mode, then the best would be transferred to a maximum brightness of the screen, the software settings for optimal performance mode.

1.Battery Mark memory of a certain request, if the memory of the relatively low death may occur, the proposed system, Win98, at least 64MB RAM or more, Win2k more than 128MB system, WinXP 256MB or more in order to avoid the crash occurred.

2. Attention to the settings should be revised, such as the power to use the program, warning, status bar, the screen saver, hibernation, we should double-check if there are any omissions, affect the accuracy of test results.

3. Battery Mark sometimes run the wrong time, the user need not worry as long as a good restart, but also in front and then continued to interrupt the test.

4. Lithium COMPAQ 182281-001 Battery , COMPAQ 301956-001 Battery because of the limited number of charge and discharge, and occasionally you will not run on life have much effect, but if too frequent use of the Battery Mark test, will affect battery life.

The voltage and temperature

With daily life in portable applications have emerged more and more, the rechargeable batteries become more important than ever. They are widespread in the laptop pc, cellular phone, pda and more applications in the future. Pc laptop in the more powerful, more compact size, low price, while its battery standby time is not the same speed increase. Bluetooth is a 24-hour active color display and a new type of cellular phone, also shorten the waiting time. Chemical battery technology reached a moderate stage of development, unprecedented growth has not kept pace with the demand for portable applications, such a situation to the battery manufacturers have brought tremendous pressure. Waiting for a breakthrough in fuel cell technology, while vendors for rechargeable batteries to the complexity of chemical products, through improved battery management design, greater access to energy. Lithium-ion battery technology Today’s portable applications widely used in rechargeable battery technology is the chemical lithium-ion technology, energy density is about 100 wh / kg, is portable applications. Performance of its products is the nearest nimh, the energy density of 75 wh / kg. Pc in the laptop, with other electronic components become smaller, lighter, battery has become the total weight on an increasingly prominent part. Cost is not particularly high in the circumstances, light energy will be favored. Lithium-ion technology they have very low self-discharge rate, low maintenance and relatively short charging time, able to compete successfully in today. As lithium-ion in the management and monitoring is also a highly complex chemical technology, therefore, the paper will be pc laptop batteries as an example, focus on the technology. The lithium-ion technology issues Lithium-ion technology is not perfect embodiment, although low self-discharge rate advantage is its life, but it still faces some impact on the life of other factors, see Figure 1. The first is the problem of aging batteries. Lithium-ion batteries from the manufacturer at the start even if not, will gradually lose its full charge capacity (fcc). This aging rate depends on temperature and battery charging status. Pc laptop batteries most often deposited in the office environment, that is, 100% charge and at room temperature conditions. Under such conditions, the battery will lose its annual fcc of 20%. The temperature is higher than 25 ¡æ, stolen, will be more serious. This problem can reduce the storage temperature and charge state to be resolved. In 40 percent of capacity and 0 ¡æ, the annual loss of battery power is about 4 per cent of its fcc, but it will challenge the flexibility of working at portable applications. Clearly, the actual lithium-ion battery life than the expected short. Decided to lithium-ion batteries in the health status of the life cycle is another factor that the battery in its power greatly reduced tolerance before the charge / discharge cycle a few. Lithium-ion batteries with low maintenance, is that they do not require users to battery “deep cycle (deep cycle)”, as nicd nimh batteries or in the case. In fact, a deep discharge cycles will actually increase the impedance of the battery, reducing its capacity. Lithium-ion battery voltage level below a certain value (for the traditional 2 v) will be permanently damaged. The latest technological developments to further reduce the minimum voltage value, but it still exists. When the battery impedance increases, the battery voltage current load will soon dropped this low, reducing the need for rechargeable batteries before the effective running time. In addition, the cycle of life will be shortened as the temperature increases. Early intelligent power management system Pc laptop users certainly do not want to pc battery storage to the refrigerator, in power do not want to run out before, always worrying about battery use the remaining time. To this end, the laptop power supply designers to design power management system to calculate battery life, and a reliable feedback to use the remaining time. This feature laptop pc commitment from the past, but are now usually from their own internal battery completed. In order to fcc and the battery life cycle to make a good estimate, power management systems need to understand the aging batteries and the number has been recycled. pc battery life than the head, not only with a battery, will be above those parameters stored in a battery cell itself, stored in the pc than in the more appropriate. Some other help to enhance the accuracy of estimates of the parameters are temperature logging and cyclical battery impedance measurement. The use of modern smart battery technology is to increase the battery capacity of a viable programme. Early today, and some battery management systems, and batteries do not fcc specific real-time assessment of the necessary parameters to track. This system is a surplus of electricity is estimated that the battery does not consider the degradation of state. This surplus capacity is expected to increase over time become increasingly inaccurate, the results will have two situations. If a case is the valuation of the remaining capacity for optimism, then the battery failure, and the pc still on the screen indicates that the battery is also available in time. This usually caused by the user’s dissatisfaction, which are often avoided by the designers. Another case is the valuation of surplus electricity for the pessimistic, although this method will not appear ahead of the end of battery life, but to a certain extent, the residual waste of electricity. Many designers still prefer the battery pessimistic estimation. Coulomb counting method Keep the battery pack fcc forecast for the remainder of the real-time electricity consumption is estimated to provide a more accurate basis. This will enable battery designers can reduce the estimated surplus of electricity, “protected areas”, thereby increasing user access to electricity from the battery pack the actual time. Fcc to maintain real-time estimates of modern smart battery technology is not the challenges faced by the end. Users concerned about the stability of the remaining power, this figure depends on the state of rechargeable batteries, rechargeable battery status equivalent to the fcc cut so far consumed power. In addition, the remainder of a battery depends on the load current valuation. Users through a wireless lan way to full brightness in their lcd screen tv programmes broadcast on the flow of electricity consumption, only documents than in the operation and no other peripheral devices running the circumstances much more. In the development of the battery monitoring system from the battery voltage is estimated charge state. This approach also applied for the pc battery not sufficiently precise. Batteries need time to track the inflow or outflow of current, and record their total. This monitoring method known as Coulomb count (coulomb counting), see Figure 2, it needs to accumulate points or adc fixed to monitor the inflow or outflow of current battery. Through Coulomb count, batteries can also know that the remaining number of its own electricity. Know the remaining capacity, the remaining time will be able to load from the current continuous measurement of the estimated. In short, the smart battery of modern technology must be able to tell users in the current load, how long the battery can use. To enable the accurate valuation of as much as possible, the battery needs: ¢Å adc monitor the use of high-resolution current load; ¢Æ Coulomb Counter calculated using the surplus electricity; ¢Ç use cycle counter (usually stored in eeprom in a value), battery life, temperature logging, based on simultaneous real-time measurement of voltage and current parameters such as battery impedance calculation of the battery charge of the whole. Available to the user’s end-use batteries fcc time will be left to the charge state calculated, it depends on the load on the battery, taking into account impedance of the battery, so as to avoid damage of a low voltage. Coulomb counting methods used to achieve the remaining capacity calculation is a great challenge. It requires a dedicated high-pressure-resistant analog circuits for monitoring, non-volatile memory for parameter storage and a powerful cpu to calculation. atmel atmega 406 companies to provide the smart battery mcu can be achieved Coulomb count programme. atmega 406 with an on-chip voltage regulator can directly from the pc battery to 4 ~ 25 v the scope of supply. It has four high-voltage differential resistance adc access to the lithium-ion battery up to four separate monitor. atmega 406 inside a cumulative two-way automatic Coulomb Counter, a 18 per second have tired of value-added. The voltage and temperature measurements, a 13 the sigma / delta adc. atmega 406 based on the commonly used avr (r) 8 architecture, a 40 kb on-chip memory and 512 b procedures of the eeprom (used to store parameters). Sm-bus device equipped with communications functions, the lqfp a 48-lead package. It is also an independent ad hoc battery protection circuit. Summary Intelligent battery within the ingenious use of microelectronics technology for battery users a lot of convenience. Intelligent power management system to achieve a simple understanding of the programme is not battery charging status, and battery life before the arrival of the shutdown, or show than the actual available capacity of slightly less electricity. Another programme that is a mature Coulomb count, can the life of the battery, the use of history, load status and charging parameters such as track, to provide users with the best safety of the remaining time estimated

Lithium ion batteries history

Lithium ion batteries were first proposed by M.S. Whittingham (Binghamton University), then at Exxon, in the 1970s. Whittingham used titanium sulfide as the cathode and lithium metal as the anode.

The electrochemical properties of the lithium intercalation in graphite were first discovered in 1982 by Rajeeva R. Agarwal and J. Robert Selman at the Illinois Institute of Technology. They obtained the activity of lithium in graphite and showed the diffusion of lithium was rapid and reversible in essence proving its rechargeability.

Lithium batteries in which the anode is made from metallic lithium pose severe safety issues. As a result, lithium-ion batteries were developed in which the anode, like the cathode, is made of a material containing lithium ions. Lithium-ion batteries came into reality when Bell Labs developed a workable graphite anode to provide an alternative to the (metallic lithium anode) lithium battery. Following groundbreaking cathode research by a team led by John Goodenough, the first commercial lithium-ion battery was released by Sony in 1991. The cells used layered oxide chemistry, specifically lithium cobalt oxide. These batteries revolutionized consumer electronics.

In 1983, Michael Thackeray, John Goodenough, and coworkers identified manganese spinel as a cathode material. Spinel showed great promise, since it is a low-cost material, has good electronic and lithium ion conductivity, and possesses a three-dimensional structure which gives it good structural stability. Although pure manganese spinel fades with cycling, this can be overcome with additional chemical modification of the material. Manganese spinel is currently used in commercial cells.


In 1989, Arumugam Manthiram and John Goodenough of the University of Texas at Austin showed that cathodes containing polyanions, eg. sulfates, produce higher voltage than oxides due to the inductive effect of the polyanion.

In late 1996, Padhi, Goodenough and coworkers identified the lithium iron phosphate (LiFePO4) and other phospho-olivines (lithium metal phosphates with olivine-structure) as cathode material for lithium ion batteries. Owing to its tremendous superiority over other cathode materials in terms of cost, safety, stability and performance, LiFePO4 is currently being used or developed for most lithium-ion batteries to power portable devices such as laptop computers and power tools. LiFePO4 is most suitable for large batteries for electric automobiles and other energy storage applications such as load saving, where safety is of utmost importance.

In 2002, Yet-Ming Chiang and his group at MIT published a paper in which they showed a dramatic improvement in the performance of Li batteries by boosting the material's conductivity by doping it with aluminium, niobium and zirconium, though at the time, the exact mechanism causing the increase became the subject of a heated debate.

In 2004, Chiang again increased performance by utilizing iron-phosphate particles less than 100 nanometres across. This miniaturized the particle density by almost 100 fold, increased the surface area of the electrode and improved the battery's ability to store and deliver energy. Commercialization of the iron-phosphate technology led to a competitive market and a patent-infringement battle between Chiang and Goodenough, two of the leading developers of the technology.