KR100531855B1 - A method and a device of displaying remained discharge time for rechargeable battery - Google Patents

Abstract

The present invention is to calculate and display the correct remaining time by detecting the number of charge and discharge of the charge and discharge battery and the temperature, the charge and discharge battery to repeat the process of storing and outputting the current; A protection unit for measuring the voltage of the charging / discharging battery, accumulating the charging / discharging frequency and detecting the internal temperature; A digital converting unit detecting information of the charging / discharging battery through the protection unit and converting the information into the digital information; A control unit for inputting and analyzing information of the charging / discharging battery and monitoring and controlling each functional unit; A mapping memory configured to output a discharge characteristic curve equation based on temperature information of a charge / discharge battery applied from a controller; A processor configured to calculate a remaining time by inputting a measurement voltage, a measurement time, charge / discharge frequency information, and a discharge characteristic curve equation of the charge / discharge battery applied from the controller; A display unit for visually displaying remaining time information applied from the processing unit, and further comprising: detecting and measuring the corresponding information of the charge / discharge battery; Determining whether the measured voltage of the charge / discharge battery is greater than a threshold value; A first calculation process of calculating a remaining time by subtracting a measurement time larger than a threshold value from an updated end time when the measured voltage is greater than a threshold value; In the above process, if the measured voltage is smaller than the threshold value, the remaining time is calculated by subtracting the measured time smaller than the threshold value from the updated end time.

Calculating a second calculation process; It characterized in that the process of displaying the remaining amount of new calculated in the above process.

Description

Residual time display device and method of charging / discharging battery {A METHOD AND A DEVICE OF DISPLAYING REMAINED DISCHARGE TIME FOR RECHARGEABLE BATTERY}

The present invention relates to displaying remaining time of a charge / discharge battery, and more particularly, to a remaining time display device and method for a charge / discharge battery for calculating and displaying an accurate remaining time by reflecting the number of charge and discharge cycles and temperature.

RECHARGEABLE BATTERY is to supply DC power by charging DC power and discharging the charged power as above. It is used to supply operation power to mobile electronic equipment. .

Recently, a mobile terminal, one of the mobile communication equipments, uses a charge / discharge battery for supplying operating power.In the characteristic of communication equipment, if the power supply is interrupted during communication, important contents cannot be delivered. In the case of no communication content transmission, the remaining discharge capacity or remaining capacity of the charge / discharge battery is displayed to prevent problems such as an opportunity loss.

As described above, the method of displaying the remaining amount of the charge / discharge battery may be displayed in the amount of the current remaining capacity and in the time reflecting the current consumption, and the present invention relates to the method of displaying in time.

As the number of charge / discharge batteries increases, the charge / discharge capacity gradually decreases as the number of charge / discharge batteries increases, and the charge / discharge capacity does not decrease in proportion to time even when a certain amount of current is consumed. Therefore, it is necessary to develop a method of displaying a more accurate remaining amount by reflecting the above characteristics.

In addition, the charge and discharge battery manufacturer provides a corresponding charge and discharge characteristics graph, the graph provides that measured under the condition of the number of charge and discharge cycles of the best state.

Hereinafter, the remaining amount display method of the charge-discharge battery according to the prior art will be described with reference to the accompanying drawings.

1 is a functional configuration diagram of a remaining time display device of a charge / discharge battery according to the prior art, and FIG. 2 is a flowchart of a remaining time display method of a charge / discharge battery according to the prior art.

Referring to FIG. 1, the charging / discharging battery 10 is repeatedly reused by storing DC power by charging and supplying DC power by discharging; A digital converter 20 for converting an analog value of a direct current (DC) power output from the charge / discharge battery 10 into a digital value; A mapping memory (30) for converting and storing a discharge characteristic curve graph of the charge / discharge battery (10) into a digitized table and outputting a residual capacity corresponding to a voltage applied and mapped from the digital converter (20); A processing unit 40 which calculates and outputs a remaining time by dividing the remaining capacitance output from the mapping memory 30 by the consumption current; A display unit 50 for visually displaying remaining time information output from the processing unit 40; It is a structure comprised by the control part 60 which controls and monitors each said functional part.

Referring to FIG. 2, the remaining time display method of the charge / discharge battery according to the prior art will be described.

A first step (S10) of measuring a current analog voltage output from the charge / discharge battery (10); A second step (S20) input by the digital converter 20 and converting the digital voltage value; A third step S30 of determining whether a current value consumed by the load LOAD has been confirmed; A fourth step (S40) of measuring a voltage of the charge / discharge battery 10 at predetermined time intervals when the current consumption of the load is not determined as determined in the third step (S30); A fifth step S50 of mapping the voltages measured at predetermined time intervals to the discharge graph table stored in the mapping memory as described above; A sixth step S60 of calculating a residual current corresponding to a voltage at a predetermined time interval mapped in the step S50 to calculate a current consumption and detecting a final remaining capacity of the charge / discharge battery 10; ; A seventh step (S70) of mapping the digital voltage value to a discharge graph table when the current consumption of the load is confirmed in the third step (S30); An eighth step (S80) of detecting a residual capacitance corresponding to the voltage mapped in the step (S70); A ninth step S90 of dividing the detected final residual capacity by the identified current consumption to calculate a remaining time; The configuration includes the tenth step S100 of outputting the remaining time calculated in the step S90 to the corresponding display unit 50 for displaying and ending the same.

Hereinafter, by the configuration as described above, the remaining time display method of the charge-discharge battery according to the prior art will be described in detail with reference to the accompanying drawings.

The analog power output from the charge / discharge battery 10 is applied to the digital conversion unit 20 and measured (S10), and the analog voltage value measured as described above is converted into a digital voltage value by the digital conversion unit 20. It is converted and output to the mapping memory 30.

The controller 60 checks whether the current value consumed by the load is known (S30), and when it is confirmed in step S30 that the current consumption value of the load is not known, the charge / discharge battery 10 at a predetermined time period. Measure the output voltage value again (S40).

The output voltage value of the charge / discharge battery 10 measured at the time period as described above is mapped to the discharge graph table stored in the mapping memory 30 (S50), and the remaining capacity of the time period measured by the mapping is analyzed to determine the time. The final residual capacity is detected while calculating the current consumption of the unit (S60).

In addition, if it is determined in step S30 that the current consumption of the load LOAD is already known, the controller 60 discharges the voltage value output from the digital converter 20 to the mapping memory 30. By mapping to a graph table (S70), the current remaining capacity of the charge / discharge battery 10 is detected (S80).

As described above, the current consumption of the load has already been confirmed or calculated by calculation, and the controller 60 controls the processor 40 while detecting the remaining capacity of the current time of the charge / discharge battery 10. The remaining time is calculated because the process of dividing the detected residual capacity by the consumption current is performed (S90), and the remaining time calculated as described above is consumed when the load LOAD consumes the remaining capacity of the charge / discharge battery 10. It represents the time that can be continuously consumed based on the current, and is applied to the display unit 50 under the control of the control unit 60, thereby displaying the time that can continue to use the charge-discharge battery 10 more.

However, the prior art as described above does not reflect the characteristic that the charge capacity continues to decrease constantly as the number of charge / discharge cycles of the charge / discharge battery 10 increases, which causes a problem of not accurately displaying the actual remaining time.

In addition, the prior art as described above is based on the premise that the remaining capacity of the charge / discharge battery 10 decreases linearly with time, and in practice, the remaining capacity does not decrease linearly with time. Or there is a problem that does not display the remaining amount correctly.

In addition, the prior art as described above is based on the premise that the remaining capacity of the charge-discharge battery 10 corresponds to the voltage one-to-one (ONE TO ONE MAPPING), but the remaining capacity or the remaining amount by the characteristic that does not actually correspond one-to-one There is a problem with not displaying correctly.

In addition, the charge / discharge battery 10 has a problem that the internal temperature is changed by the temperature of the surrounding use environment, and does not reflect the change in the discharge characteristics due to the temperature change as described above, and thus does not display the correct remaining time. There is.

In addition, since the mapping memory 30, which digitalizes the discharge characteristic curve provided by the charge / discharge battery 10 manufacturer and stores it as a table, requires a large memory capacity, there is a problem that the size becomes large and costly.

The present invention provides an apparatus and method for displaying remaining time of a charge / discharge battery that accurately calculates and displays a remaining time by accurately detecting a remaining capacity by reflecting the number of charge / discharge cycles and temperature changes of the charge / discharge battery and dividing by the consumption current of the load. That is the purpose.

The present invention devised to achieve the above object, the charging and discharging battery to repeat the process of storing the current by the charge, and outputting the current by the discharge; A protection unit for charging and discharging the charging / discharging battery, measuring a voltage, accumulating a charging / discharging frequency, and detecting an internal temperature by a resistance value change; A digital converter which detects the measured voltage, the number of charge / discharge cycles and the temperature of the charge / discharge battery through the protection unit, and converts the measured voltage into digital information; A control unit for inputting and analyzing information of the charging / discharging battery from the digital conversion unit, monitoring each function unit, and performing corresponding control; A mapping memory for outputting a corresponding discharge characteristic curve equation based on temperature information of a charge / discharge battery applied from the controller; A processor configured to calculate a remaining time by inputting a measurement voltage, a measurement time, charge / discharge frequency information, and a discharge characteristic curve equation of the charge / discharge battery applied from the controller; And a display unit for visually displaying remaining time information applied from the processing unit.

In addition, the present invention devised to achieve the above object, the process of detecting the voltage, the number of charge and discharge, the internal temperature of the charge-discharge battery and reading the corresponding discharge characteristic curve equation; Determining whether the measured voltage of the charge / discharge battery is greater than a threshold in the process; A first calculation step of calculating the remaining time by calculating a subtraction of the measurement time when the measurement voltage is greater than the threshold value from the end time in which the number of charge and discharge cycles is determined in the process; A second calculation step of calculating the remaining time by subtracting the measurement time when the measurement voltage is smaller than the threshold value from the end time in which the number of charge / discharge cycles is reflected when it is determined in the above process; The remaining time calculated in the above process is characterized by consisting of the process of displaying on the display.

Hereinafter, an apparatus and method for displaying a remaining time of a charge / discharge battery according to the present invention will be described with reference to the accompanying drawings.

3 is a functional configuration diagram of a remaining time display device of a charge / discharge battery according to the present invention, FIG. 4 is a detailed functional configuration diagram of a protection unit according to the present invention, and FIG. Figure 6 is an illustration of the charge and discharge battery discharge characteristic curve stored in the mapping memory of Figure 6 is an illustration of the formula of the discharge characteristic curve of the measured voltage versus the remaining time according to the present invention in two circle equation, Figure 7 An example of charging and discharging characteristics curve of 0.04 slope versus charge capacity characteristic curve according to an example, Figure 8 is an illustration of the discharge characteristic curve reflecting the number of charging and discharging according to the present invention, Figure 9 is the remaining amount of charge and discharge battery according to the present invention It is a time display flowchart.

Referring to FIG. 3, the remaining time display device of the charge / discharge battery according to the present invention includes a charge / discharge battery which stores a current by charging and outputs the stored current by discharging. RECHARGEABLE) (100),

Charge and discharge the charge and discharge battery 100, measure the voltage, count the number of charge and discharge (ACCUMULATING COUNT), and by detecting the internal temperature changed by the resistance value change, the charge and discharge battery 100 Limiting unit 112 for blocking the overcharge and discharge (OVER CHARGING / DISCHARGING) by limiting the voltage input and output to the predetermined range and measuring the current voltage (Vme); A counting unit 114 for accumulating (ACCUMULATING COUNT) the number of charge / discharge cycles (N) of the charge / discharge battery (100); A protection unit 110 including a temperature unit 116 for detecting a change in temperature by detecting a change in internal resistance of the charge / discharge battery 100;

A digital converter 120 which detects the measured voltage (Vme: Vmeasure), the number of charge / discharge, and the temperature of the charge / discharge battery through the protection unit 110 and converts it into digital information;

Input and analyze the information of the charge-discharge battery 100 from the digital conversion unit 120, monitor each function and perform the corresponding control, measurement of the charge-discharge battery 100 through the digital conversion unit 120 The voltage Vme, the number of charge / discharge cycles, and the internal temperature are input as digital values, and the corresponding measured characteristic voltage Vme and the internal temperature are applied to the mapping memory 140 to check the corresponding discharge characteristic curve. A controller 130 for outputting the discharge characteristic curve equation, the measured voltage Vme, and the number of charge / discharge N information, which are identified as described above, to the processor 150;

The discharge characteristic curve equation is output by the temperature information of the charge / discharge battery 100 applied from the controller 130, and the discharge characteristic curve of the voltage vs. residual time for each internal temperature of the charge / discharge battery 100 is calculated. with (ya) ** 2 = (xb) ** 2 and (yc) ** 2 = (xd) ** 2, and two original equations are r ** 2 _UPPER = a ** 2 + b * * 2 and r ** 2 mapping memory 140 that is formulated and stored as _LOWER = c ** 2 + d ** 2, and outputs a discharge characteristic curve corresponding to the input temperature value;

Remaining time (Tre: Tremain) by inputting the measurement voltage (Vme), the measurement time (Tme: Tmeasure), the number of charge and discharge (N) of the charge-discharge battery 100 applied from the controller 130, and the discharge characteristic curve formula ) By calculating the discharge characteristic curve equation, the measured voltage (Vme) and the number of charge and discharge (N) of the charge and discharge battery 100 input from the controller 130 Wow Wow Wow Wow A processing unit 150 for calculating and outputting a remaining time Tre by Trem by processing the equation;

It consists of a display unit 160 for visually displaying the remaining time (Tre) information applied from the processing unit 150.

Hereinafter, the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

The charging and discharging battery 100 is to charge and discharge a number of times, by outputting the current stored in the charge as a discharge to use the load (LOAD) or electronic equipment, for example, the operating power of the portable terminal, the number of charge and discharge According to (N), as shown in FIG. 7, the charging capacity is constantly reduced, and FIG. 7 shows, for example, a characteristic curve of the charge / discharge battery 100 in which the charging capacity is constantly reduced by a slope of 0.04.

5 is a discharge characteristic curve provided by a company that produces and sells the charging / discharging battery 100, and the charging and discharging battery 100 is constantly consumed at a corresponding current consumption. It is shown that different discharge characteristic curves are formed depending on the ambient temperature of the environment or the temperature generated by internal heat.

The charge / discharge battery 100 is a cutoff voltage that is a state in which all the current that can be discharged is called a cutoff voltage, and is generally a voltage of 3 volts (V). Termination voltage (Vsd) to prevent over-discharge, to prevent over-discharge by the limiting unit 112 constituting the protection unit 110, and to supply the operating power to the portable terminal to prevent damage to Is set to a voltage slightly higher than the cutoff voltage.

The limiting unit 112 of the protection unit 110 blocks overdischarge and at the same time blocks overcharge, measures the current voltage of the charge / discharge battery 100, and the counter 114 controls the charge / discharge battery ( Cumulative count of the number of charge and discharge of the 100 and output according to the control signal, the temperature unit 116 changes the internal temperature by the ambient temperature change or charge and discharge of the charge and discharge battery 100, and As the internal temperature of the charge / discharge battery 100 changes as described above, the internal resistance value changes, and the internal resistance value changes as described above. The internal temperature of the charge / discharge battery 100 is relatively measured and output. The internal temperature is measured as shown in FIG. 5 because the discharge characteristic curves of the charge / discharge battery 100 differ from each other according to the internal temperature.

As described above, since the measured voltage, the number of charge / discharge cycles, and the internal temperature of the charge / discharge battery 100 detected and measured by the protection unit 110 are analog values, the digital conversion unit 120 uses the digital values. Is converted to and applied to the controller 130.

The controller 130 analyzes the input values, outputs a temperature value of the charge / discharge battery 100 to the mapping memory 140, and outputs a formula representing a discharge characteristic curve based on the temperature. Read from).

The attached FIG. 6 converts the discharge characteristic curve shown in FIG. 5 into two circle equations, and shows the reference points of the voltages. The circle and radius is represented by the second circle that is small and located below, the first circle is a circle centered on the points a (a) and b (non) r ** 2 _UPPER = a ** 2 + B ** 2, (ya) ** 2 = (xb) ** 2, where the second circle is a circle centered on c (hour) and d (d) points r ** 2 _LOWER = c * * 2 + d ** 2, (yc) ** 2 = (xd) ** 2

In FIG. 6, the threshold point at which the first circle and the second circle meet is set as the threshold value, and is set as the threshold voltage Vth, and the x (x) axis value of the threshold voltage is x (x) by the second circle. ) D (D), which is an axis center value, the shutdown voltage or shutdown voltage (Vsd: Vshutdown) becomes an end time (Tsd: Tshutdown), and the termination voltage (Vsd) is carried by an example. This is a voltage that various operating programs of the terminal cannot operate.

The controller 140 reads the measured voltage Vme detected from the charge / discharge battery 100, the number of charge / discharge cycles, and the mapping memory 140 to determine a discharge characteristic curve equation corresponding to a temperature. Information is applied to the processing unit 150, and the processing unit 150 analyzes the remaining time (Tre: Tremain) for continuing to use the charge / discharge battery 100 by using the information input as described above. .

 The measured voltage Vme of the charge / discharge battery 100 is the y-axis, and there are two cases in which the x-axis value is expressed by the following equation depending on whether the measured voltage is greater or smaller than the threshold voltage.

(Formula 1)

Referring to FIG. 6, the measurement time Tme of the x-axis by the measurement voltage Vme of the y-axis is expressed as follows.

(Formula 2)

Referring to FIG. 6, the remaining time Tre available for further use of the charge / discharge battery 100 may be expressed by the following equation.

(Formula 3)

Tremain = Tshutdown-Tmeasure

The discharge characteristic curve of FIG. 6 is based on the internal temperature of the charge / discharge battery 100 detected as an example, and when the temperature is different, the discharge characteristic curves are different, so that the center points of the first circle and the second circle are different. According to the shape of the discharge characteristic curve, it may be an elliptic equation instead of a circular equation.

As described above, two circle equations or ellipse equations in which the discharge characteristic curves of the charge / discharge battery 100 according to respective temperatures are modified are stored and stored in the mapping memory 140, and the temperature is stored in the controller 130. It is output by the value input and the corresponding control signal.

Therefore, the conventional mapping memory 30 digitally records a plurality of discharge characteristic curves due to temperature, and thus requires a large amount of memory. However, in the present invention, since the corresponding equations are recorded, the memory of the mapping memory 140 is stored. There is an advantage of greatly reducing the size.

In addition, the charge / discharge battery 100 has a characteristic, as the number of charge / discharge cycles increases, the charge capacity decreases at a constant rate. For example, in FIG. 7, the charge / discharge battery 100 has a slope of 0.04 compared to the number of charge / discharge cycles. Table of charge capacity characteristics is shown.

Referring to FIG. 7, there is a precisely linear relationship between the number of charge and discharge cycles N and the charge capacity (%), and the characteristic table of FIG. 7 may be expressed by the following equation.

 (Formula 4)

y = -0.04x + 100

In the discharge characteristic curve of FIG. 6 according to the above example, the center axis of the second circle or ellipse below moves to the left as shown in FIG. 8 when the number of charge / discharges N according to the above formula is applied. , The movement is linearly moved by the number of charge and discharge cycles (N).

That is, referring to FIG. 8, in order to coincide with a constant end voltage Vsd as the number of charge / discharges increases, a change ΔT occurs in the end time Tsd. Thus, the newly updated end time T 'sd) is detected or calculated.

The number of charge / discharge cycles N is reflected, and the updated end time T'sd is expressed by the following equation.

(Formula 5)

Since the end time Tsd is changed to the updated end time T'sd by the number of charge / discharge cycles as described above, the expression representing the lower characteristic curve is changed as follows.

(Formula 6)

(y-c) ** 2 = (x-d + 4 * (10 **-4) * N * Tshutdown) ** 2

Considering the number of charge and discharge cycles N as described above, the remaining time (Tre: Tremain) and the measurement time (Tme: Tmeasure) are expressed as follows.

(Formula 7)

The controller 130 reading the above equation from the mapping memory 140 applies the equation, the measurement voltage Vme, and the number of charge / discharge information to the processor 150, and The required remaining time Tre is calculated by the calculation, and the calculated remaining time Tre is displayed on the display unit 160 as time information.

Hereinafter, the remaining time display method of the charge-discharge battery according to the present invention will be described with reference to the accompanying drawings.

A voltage Vme of the charge / discharge battery 100 is measured by the protection unit 110 and converted into a digital value signal by the digital conversion unit 120 (S110); The number of charge / discharge cycles (N) of the charge / discharge battery 100 and the internal temperature are detected and measured through the protection unit 110, and converted into a digital value signal by the digital conversion unit 120. A measurement process of reading the corresponding discharge characteristic curve equation (S120);

The measurement voltage Vme of the charging / discharging battery 100 in the measuring process is changed by two equations or ellipses by two equations indicating the corresponding discharge characteristic curvature by the measured and measured internal temperature of the charging / discharging battery 100. Determining whether the value is greater than the voltage Vth due to the threshold value at the meeting point (S130);

When the measured voltage Vme is greater than the threshold value Vth as determined in the determination process (S130), the number of charge / discharge cycles (N) is reflected, and in the discharge characteristic curve due to the temperature of the charge / discharge battery 100. The remaining time Tre is calculated by subtracting the measurement time Tme when the threshold voltage Vth is greater than the threshold time Vth from the updated end time T'sd of the time at which the end voltage Vsd which cannot be used as the power supply is detected. By calculating the improved end time T'sd by subtracting the end time Tsd multiplied by the charge capacity reflecting the number of charge / discharges N from the end time Tsd; The absolute value obtained by subtracting the value of A (a) of the first circle or ellipse from the measured voltage Vme of the charge / discharge battery 100 is subtracted from the ratio (b), and the equation Tme = b-| Vme-a | (Tme: measurement time, b: x-axis center value of the first circle, Vme: measurement voltage, a: y-axis center value of the first circle) to calculate the measurement time value Tme; A first calculation process S140 of subtracting the measurement time Tme from the improved end time T'sd and setting it as a remaining time Tre;

When the measured voltage Vme is smaller than the threshold value Vth as determined in the determination process S130, the threshold value Vth is determined from the updated end time T'sd reflecting the number of charge / discharge times N. The remaining time Tre is calculated by subtracting the measurement time Tme in the case of smaller than), and subtracting the end time Tsd by multiplying the charging capacity by the number of charge / discharge times from the end time Tsd. Calculated end time T'sd; The absolute value obtained by subtracting the time value (c) of the second circle or ellipse from the measured voltage Vme of the charge / discharge battery 100 is the capacity decrease amount by the end time (Tsd), the number of charge / discharge cycles (N), and the percentage (%). And subtracting the result of the operation from the d (d) value of the second circle or ellipse, and the equation Tme = d-4 * 10 ** (-4) * N * Tsd + Vme- a | Measurement time calculated by (Tme: measurement time, d: center of x axis of second circle, N: number of charge and discharge cycles, Tsd: end time, Vme: measurement voltage, c: center of y axis of second circle) A second calculation process (S150) of setting a value Tm and subtracting the measurement time Tme from the improved end time T'sd and setting it as a remaining time time Tre;

The remaining time Tre calculated in the above process is displayed on the display unit 160.

Hereinafter, the charge and discharge battery remaining time display method according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

The voltage Vme of the charge / discharge battery 100 is measured and converted into a digital value signal (S110). At the same time, the number of charge / discharge times (N) and temperature are detected and converted into a digital value signal. The corresponding discharge characteristic curve equation based on the internal temperature is read from the mapping memory 140 (S120), and the measured voltage characteristic Vme of the charge / discharge battery 100 is determined by analyzing the read discharge characteristic curve equation. It is determined whether the voltage is a larger value or a smaller value (S130).

In the determination (S130), when the measured voltage Vme is greater than the threshold voltage Vth, the updated end time T'sd is obtained as shown in Equation 5, and the remaining time Tre as shown in Equation 7. And the measurement time (Tme) "Tme = b-| Vme-a |" are respectively obtained (S140).

Further, in the determination (S130), when the measured voltage Vme is smaller than the threshold voltage Vth, the updated end time T'sd is obtained as shown in Equation 5, and the remaining time Tre as shown in Equation 7 above. ) And the measurement time (Tme) "Tme = d-4 * 10 ** (-4) * N * Tsd + | Vme-c |", respectively (S150).

Since the remaining time (Tre) information of the charge-discharge battery 100 obtained as described above is visually displayed on the display unit 160, the time can be further confirmed.

The present invention having the above configuration has an industrial use effect of displaying the remaining capacity of the charge / discharge battery with accurate time information reflecting the temperature and the number of charge / discharge cycles.

In addition, since each characteristic curve according to the temperature of the charge-discharge battery is stored and referred to as two circle or ellipse equations, there is an industrial use effect of reducing the amount of memory, reducing the size of the product, and reducing the cost.

In addition, since the remaining capacity of the charge-discharge battery is displayed as time information, there is a convenient effect in use to easily confirm the time that can be used continuously.

1 is a functional configuration of the remaining time display device of the charge and discharge battery according to the prior art,

2 is a flowchart illustrating a remaining time display method of a charge / discharge battery according to the prior art;

3 is a functional configuration of the remaining time display device of the charge-discharge battery according to the present invention;

4 is a detailed functional configuration of the protection unit according to the present invention;

5 is an exemplary view of a charge / discharge battery discharge characteristic curve stored in the mapping memory of the present invention;

6 is an exemplary diagram for formulating a discharge characteristic curve of measured voltage versus remaining time by two circular equations according to the present invention;

7 is a diagram illustrating a charge capacity characteristic curve versus a charge / discharge frequency of 0.04 slope according to an example of the present invention;

8 is an exemplary discharge characteristic curve reflecting the number of charge and discharge cycles according to the present invention;

9 is a flowchart illustrating a remaining time display method of a charge / discharge battery according to the present invention.

** Explanation of symbols on the main parts of the drawing **

100: charge and discharge battery 110: protection unit 112: limiting unit

114: counting unit 116: temperature unit 120: digital conversion unit

130 control unit 140 mapping memory 150 processing unit

160: display unit

Claims (13)

A charge and discharge battery that stores a current by charging and repeats a process of outputting a current by discharge; A protection unit for charging and discharging the charging / discharging battery, measuring a voltage, accumulating the charging / discharging frequency, and detecting an internal temperature by a change in resistance value; A digital converter which detects the measured voltage, the number of charge / discharge cycles, and the temperature of the charge / discharge battery through the protection unit and converts the measured information into digital information; A control unit for inputting and analyzing information of a charge / discharge battery from the digital conversion unit, monitoring each function unit, and performing corresponding control; A mapping memory for outputting a corresponding discharge characteristic curve equation based on temperature information of a charge / discharge battery applied from the controller; A processor configured to calculate a residual time by inputting a measurement voltage, a measurement time, charge and discharge count information, and a discharge characteristic curve equation of the charge / discharge battery applied from the controller; Remaining time display device of the charge-discharge battery, characterized in that consisting of a display unit for visually displaying the remaining time information applied from the processing unit. The method of claim 1, wherein the protection unit, Limiting unit for limiting the voltage input and output to the charge-discharge battery to a predetermined range to block overcharge and discharge and measure the current voltage; A counting unit for accumulatively counting the number of charge / discharge cycles of the charge / discharge battery; Remaining time display device of the charge-discharge battery, characterized in that consisting of a temperature unit for detecting a change in the internal resistance value of the charge-discharge battery. The method of claim 1, wherein the control unit, Through the digital converter, the measured voltage, the number of charge / discharge cycles, and the internal temperature of the charge / discharge battery are input as digital values, and the corresponding measured voltage and internal temperature are applied to the mapping memory to check the corresponding discharge characteristic curves. A remaining time display device for a charge / discharge battery, characterized in that for outputting the discharge characteristic curve equation and the measured voltage and the number of charge and discharge information identified in the processing unit. The method of claim 1, wherein the mapping memory, Residual time display device of the charge-discharge battery, characterized in that for storing the discharge characteristic curve of voltage vs. residual time for each internal temperature of the charge-discharge battery with the following equation, and outputs a discharge characteristic curve corresponding to the input temperature value . Equation; (y-a) ** 2 = (x-b) ** 2 (y-c) ** 2 = (x-d) ** 2 delete The method of claim 1, wherein the processing unit, Residual time display device of the charge-discharge battery, characterized in that the calculation of the discharge characteristic curve of the charge-discharge battery input from the controller, the measurement voltage and the number of charge-discharge information calculated by the following formula to calculate and output the remaining time. Equation; Detecting and measuring the voltage, the number of charge / discharge and internal temperature of the charge / discharge battery, and read the corresponding discharge characteristic curve formula; Determining whether the measured voltage of the charge / discharge battery is greater than a threshold value; A first calculation process of calculating the remaining time by calculating the number of charge / discharge times and subtracting the measurement time when the measurement voltage is greater than the threshold value from the updated end time when the measurement voltage is greater than the threshold value as determined in the above process; A second calculation step of calculating the remaining time by calculating the number of charge / discharge times and subtracting the measurement time when the measurement voltage is smaller than the threshold value from the updated end time when the measurement voltage is smaller than the threshold value as determined in the above process; Remaining time display method of the charge-discharge battery, characterized in that consisting of the step of displaying the remaining time calculated in the process on the display. The method of claim 7, wherein the threshold value, A remaining time display method for a charge / discharge battery, characterized in that the voltage value at the point where two circles meet by two equations indicating the discharge characteristic curvature of the charge / discharge battery. The method of claim 7, wherein the end time, A remaining time display method for a charge / discharge battery, characterized in that it is a time when an end voltage which cannot be used as a power source is detected in the discharge characteristic curve of the charge / discharge battery. The method of claim 7, wherein the first operation process, Calculating the improved end time by subtracting the end time multiplied by the charge capacity by the number of charge and discharge cycles from the end time; The absolute value obtained by subtracting the A value of the first circle from the measured voltage of the charge / discharge battery is subtracted from the ratio value to determine the measured time value, The remaining time display method of the charge-discharge battery, characterized in that the step of setting the remaining time by subtracting the measurement time from the improved end time. The method of claim 10, wherein the measurement time value, Formula Tme = b-| Vme-a | (Tme: measurement time, b: x-axis center value of the first circle, Vme: measurement voltage, a: y-axis center value of the first circle). The method of claim 7, wherein the second operation process, Calculating the improved end time by subtracting the end time multiplied by the charge capacity by the number of charge and discharge cycles from the end time; The absolute value obtained by subtracting the time value of the second circle from the measured voltage of the charge / discharge battery is added to the value obtained by multiplying the end time, the number of charge and discharge times, and the capacity reduction by a percentage, and the result of the calculation is determined from the di value of the second circle. Subtract the measurement time value, The remaining time display method of the charge-discharge battery, characterized in that the step of setting the remaining time by subtracting the measurement time from the improved end time. The method of claim 12, wherein the measurement time value, Formula Tme = d-4 * 10 ** (-4) * N * Tsd + | Vme-c | (Tme: measurement time, d: x-axis center value of second circle, N: number of charge and discharge cycles, Tsd: end time, Vme: measurement voltage, c: y-axis center value of second circle) The remaining time display method of the charge-discharge battery.