System of energy management to meet the greatest challenge is how to extend the operating time of battery. In addition to the search for new energy density and power system designers looking to use the battery as efficiently as possible methods. Most of them focus on improving the DC / DC conversion efficiency, prolonging battery life, but often neglected and the efficiency of power conversion and battery capacity as important as issues gas gauge the accuracy of the battery. If the battery gauges to monitor the margin of error of ± 10% in order to avoid loss of critical data, the system can only use 90% of battery power. This equates to a loss of 10% of the capacity of the battery or battery life. B150XG02 B154EW01 B154EW02
management wireless account access, data processing and medical monitoring and many other mobile applications remaining capacity of the battery requirements of high accuracy to avoid a sudden closure due to run out of power. However, to ensure that the life cycle of the battery, the overheated state or use excess electricity load measurement accuracy is difficult, end users, and even some system designers have underestimated this. Mainly because of the battery can power and firing speed, temperature, aging and self-discharge characteristics of a function. Develop an algorithm to accurately define the characteristics of the battery self-discharge and the effects of aging on the capacity of the battery are almost impossible to achieve. In addition, the fuel gauges traditional battery requires the battery is fully charged and discharged completely current capacity of the battery, which rarely occur in real applications, resulting in greater measurement error. Therefore, the battery is difficult to accurately predict the operating cycle, the remaining battery capacity and time.
This article describes how to use the latest technology 11 for measuring battery impedance tracking technology to solve the above problems, the document also cites a unique solution of the lithium-ion batteries for a case of simple design. B154EW04 V.7 B154EW04 V.1 B154EW03
The existing electricity problems in measurement techniques
Down lithium-ion battery is the main reason for the battery duration of the film, this common misunderstanding. In fact, continued to increase the impedance of the battery (not decrease battery capacity), which led to the battery life, system shutdown ahead of a key. 100 in the battery charge and discharge cycles or so, the capacity of the battery is only down 5%, while the DC impedance of the battery increases to double or triple the rate of factor party. The aging of the increase in impedance of the battery is a direct consequence of the fall of internal pressure caused by the load current increases. A result, aging batteries to minimum operating voltage (or the termination voltage) of the time much sooner than the new battery.
Traditional battery measurement technique is mainly based on the voltage and coulomb counting algorithm development, and measure the performance limitations are obvious. Since low cost and simple, based on the method of voltage measurement is widely used in mobile phones and other handheld devices, but using the impedance of the battery over time will change and affect the accuracy of the method. B154EW04 B154EW08 B154EW08 V.1
The loading conditions and temperature changes can cause the battery capacity of up to 50% discount. Most end users in the use of real gas gauge is not equipped with handheld devices, have experienced a sudden battery drain caused by the closure of the situation. On the other hand, Coulomb counting method adopted a different method of continuously thanks to the integral of Coulomb to calculate the amount consumed and the charge state of charge (SOC), while the total capacity is known therefore, the remaining capacity can be valuable. The disadvantage of this approach is difficult to accurately quantify (model) of the discharge power, and because the method does not perform a periodic calibration cycle, resulting in measurement error over time is increasing. These algorithms do not solve the change in impedance of the battery. To avoid a sudden stop, the designer must be an early termination of the system, to retain more energy, which leads to much electricity is wasted. Dell Vostro 1320 battery Dell Vostro 1500 battery
The chemical capacity of the battery impedance and dynamic control
Impedance Track (IT) technology is unique, more Jingqu existing solutions because it is Jishu learning mechanism with Neng Zhi Dao Dezi address under the impedance of the battery and vacuum conditions Huaxue all Rongliang (Qmax ) occurred Bianhua aging Wen Ti. Impedance technologically to learn and use a dynamic simulation algorithm to track the characteristics of the battery, that is, the process actually used in the battery, the first measurement of impedance and capacitance value, then follow evolution. The use of the algorithm is complete without calibration capability regular cycle. Dell Vostro 1200 battery Dell Vostro 1310 battery