The use of portable electronic products, can at any time that the remaining laptop battery power, working hours, and the application of this regulation, it is undoubtedly a very easy matter, particularly the use of smart phones or PDA mobile phone business people. Battery detection technology in notebook computers has been a common occurrence, most notebook computers have power management "> power management options, with different power modes of operation and battery alarm function, but in smaller and more portable product market, this technology Also rare.
     Portable products provided by the increasingly complex functions, users increasingly require accurate monitoring of hp laptop battery power, so a flexible management of available power, clearly shows that the remaining work time, as far as possible extension of the system is running. Most cell phones now use the power measurement method is relatively simple, the lack of precision. According to the company in charge of TI's portable power products engineers Xin He Long, the current mainstream detection method is a simple measure battery voltage, and then divided by 4 or 5, which is normally on the screen and see four or five grid of the electricity grid Bar, so The accuracy of each grid that is 20 percent or 25 percent, when the battery voltage at 2.9 V-2.7V when power will be shut down. Long Xin He pointed out that although the work of mobile phone battery voltage between 2.9 V-4.2V, but under normal circumstances, the stability of operating voltage range is 3.6 V-3.8V, in this area outside the battery discharge rate is very fast, can not To maintain adequate working hours.
     The current standard of electricity through the detection method of calculation Coulomb (Coulomb Counting) test current, voltage and temperature, and integrates the current time. This approach needs batteries and F2019B manufacturers, through the static modeling techniques based on the battery discharge rate, temperature and aging compensation, the self-discharge rate and other Bukeceliang of the current model. As model itself on the existence of error, and it is difficult to minimize, so users difficult to accurately understand the aging batteries and the actual running time, can only rely on past experience to make up for.
     Battery detection technology will be introduced to the phone can be accurately measured in single lithium-ion battery of data, so that under all conditions (and even cell aging) to calculate the remaining F1739A power. TI's Impedance Track (impedance tracking) technology 2 years has been successfully applied in the notebook market, TI has introduced for single battery power detection chip bq27500, used in cell phones. The micro and small IC can compare the battery voltage, battery impedance or resistance, and the current score, accurate analysis of the charging status, according to calculations of the discharge curve upward or downward the remaining charge state.
     bq27500 system is used in the chip side, the host system circuit board used to support embedded or removable F3172A. Xin He pointed out that system-side implementation of the programme are the advantages do not need the battery on the integrated electronic components, batteries can effectively control the size and cost, but also to control and management of other major battery management features, such as batteries certification (which is used for cell phone manufacturers Its own brand name products in the OEM battery performance of the certification).