KR20020069916A - Display method for remainder of battery - Google Patents

Abstract

PURPOSE: A method for displaying the residual of a battery is provided to display the residual of a battery in time by dividing discharging intervals according to the discharging characteristics of a battery, connecting the discharging time of each interval to a voltage level, and detecting the voltage levels of the battery at regular time intervals. CONSTITUTION: A portable terminal measures the voltage levels of the battery at regular time intervals and divides the discharging intervals of the battery according to the discharging widths. The portable phone stores each of the detected voltage levels with each discharging time. The portable phone detects the present voltage level and determines which interval the detected voltage level belongs to. The portable phone sums the discharging time based on the detected voltage level of the determined interval and the discharging time at the other intervals and outputs the sum as the residual time of the battery.

Description

How to display remaining battery charge {DISPLAY METHOD FOR REMAINDER OF BATTERY}

The present invention relates to a method of displaying a remaining amount of battery, and more particularly, to a method of displaying a remaining amount of a battery for displaying a remaining amount of a battery used as a power source in various portable devices with time.

In recent years, as the variety of portable devices has increased, the demand for batteries used as power sources has also increased. However, due to the characteristics of the battery, since power cannot be infinitely supplied, there is a problem in that all of the power can be discharged during use of the device.

Therefore, most portable devices use an AD converter (ADC circuit) to detect the remaining battery level and display it on the display of the terminal so that the user may have a spare battery or prevent the operation from stopping during operation. Allow replacement of new batteries.

In other words, it is possible to predict the discharge time of the battery in advance to prevent the inconvenience, such as work interruption accordingly.

Currently, the most representative device among portable devices is a mobile communication terminal, which is a microprocessor, a codec, a vocoder, and a main processor (MSM: Mobile Station) that implements interface functions for mobile communication. Modem), and the MSM chip further includes three ADC circuits.

In this case, the ADC circuits are being used for temperature, battery capacity, and high power detection, respectively.

In general, in most portable devices, the remaining amount of the battery is displayed using a few bars to intuitively know the discharge state of the battery as shown in FIG. 1.

In other words, all three bars are displayed in the fully charged state, only two bars are displayed in the slightly discharged state, and one bar is displayed in the almost discharged state.

In more detail, in order to display the remaining battery capacity, the minimum and maximum values corresponding to the voltages of the battery usage intervals are set, and the software is divided into three or four sections in advance based on this, and then displayed according to each section value. Set the number of bars to do.

When the power is turned on, the voltage of the battery is applied to the AD converter circuit (not shown). At this time, the detected voltage level is compared with the data set internally in the software, and the bar corresponding to the value of the current voltage level is displayed and the corresponding function (warning sound) Or power off).

However, as described above, in the related art, only the battery remaining amount is schematically displayed by the number of bars, and there is a problem in that it is not possible to know how long the correct use time and the available time remain.

Therefore, the present invention was created in order to solve the conventional problems as described above, the battery is divided into predetermined sections according to the discharge characteristics, the discharge time in each section to correspond to the voltage level, and then at regular intervals SUMMARY OF THE INVENTION An object of the present invention is to provide a method for displaying a remaining amount of a battery that detects a voltage level of the battery and displays the remaining amount of the battery at a time.

1 is an exemplary view showing a battery remaining amount display method using a conventional bar graph.

2 is a graph showing discharge characteristics of a battery.

3 is a flow chart illustrating a method for displaying battery remaining time by the present invention.

The present invention for achieving the above object, the first step of measuring the voltage level of the battery at a predetermined time interval and distinguishing the discharge period of the battery according to the discharge width; A second step of storing the voltage level detected in each discharge section in correspondence with a discharge time; Detecting a current voltage level and determining which section of the divided discharge sections corresponds to a third step; And a fourth step of outputting, as the remaining time of the battery, a value obtained by adding the discharge time of the sub-section to the discharge time according to the detected voltage level of the section.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Until now, batteries have been difficult to display due to their nonlinear nature. Therefore, in the present invention, as shown in FIG. 2, the battery discharge curve section is divided into three sections, and the voltage level is detected by varying the resolution of the ADC in each section, so that the remaining battery capacity can be displayed over time.

In other words, Figure 2 is a graph showing the discharge characteristics of the battery, the battery discharge speed is fast in the first section and the third section shows a sharp slope, the discharge rate is relatively low in the second section shows a gentle slope.

Accordingly, in the present invention, two types of ADC circuits are provided, and one section and three sections use a conventional ADC (Analog / Digital Converter) circuit that does not have a high resolution, and two sections use an ADC circuit having a high resolution. .

That is, since the slope of the voltage fluctuation with time is low in the second section, an ADC circuit having a high resolution is used to measure it.

This will be described in more detail with reference to the flowchart of FIG. 3.

First, a low-resolution conventional ADC circuit measures the voltage value over time until the battery is fully discharged, and divides it into three sections according to the change in voltage level over time.

In other words, in the full state, set the section with a large discharge width for a certain time to 1 section, set the section with a small discharge width for a time to 2 sections, and again increase the discharge width rapidly until complete discharge occurs. Set to section.

Next, the detection voltage level for the time in each section is set.

For example, to display the remaining battery capacity of a battery with a voltage level of 3 V in a full state, set 3 V to 2.71 V as one section, 2.7 V to 2.31 V in two sections, and 2.3 V or less in three sections. When set to, the value obtained by dividing the discharge time by N equals and the voltage level at each section (when discharge time is 1 minute for 10 minutes, discharge time for 2 sections is 30 minutes and discharge time for 3 sections is 5 minutes) Match it.

Accordingly, when the detected voltage level of the battery is one section, the remaining battery capacity that can be displayed as time is the time obtained by adding the remaining time in one section to the time in two and three sections (30 minutes + 5 minutes). .

Of course, in order to measure accurate time in two sections, a high-resolution ADC circuit should be used because the discharge width is small.

That is, when the battery is checked while the phone is in use, when the end point of one section, that is, the ADC value enters the dotted area A of each section in FIG. Similarly, when the 3 sections reach the end point region of the 2 sections, the 3 sections are measured by switching back to the ADC circuit of the original resolution.

Using this method, the time for each ADC value can be displayed, allowing the battery level indication to be displayed in time.

As described above, the method of displaying the remaining power of the battery according to the present invention divides the battery into predetermined sections according to the discharge characteristics, makes the discharge time in each section correspond to the voltage level, and then detects the voltage level of the battery at regular time intervals. By displaying the remaining battery time at that time, the more accurate usage time can be known and the application field of the battery remaining indication can be used more widely than present.

Claims (4)

Measuring a voltage level of the battery at predetermined time intervals and classifying a discharge period of the battery according to the discharge width; A second step of storing the voltage level detected in each discharge section in correspondence with a discharge time; Detecting a current voltage level and determining which section of the divided discharge sections corresponds to a third step; According to each of the determined intervals, the remaining amount of the battery, characterized in that the fourth step of outputting the remaining time of the battery, the sum of the discharge time according to the detected voltage level of the interval and the discharge time in the following intervals; Way. The method of claim 1, wherein when the voltage level currently detected in the fourth step is the first section, the discharge time according to the detected voltage level of the first section is added to the discharge time of the second section and the third section. Remaining battery time display method, characterized in that for outputting the remaining battery time. The battery remaining time of claim 1, wherein when the voltage level currently detected in the fourth step is a second section, the discharge time according to the detected voltage level of the second section is added to the discharge time of the third section. Remaining amount of the battery display method characterized in that the output. 4. When detecting the voltage level in the second section, detection by the ADC circuit having a higher resolution than the ADC circuit for detecting the voltage level in the first section and the third section. The remaining amount display method of the battery, characterized in that.