KR20040055207A - Method for processing the battery charge of mobile phone - Google Patents

Method for processing the battery charge of mobile phone Download PDF

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Publication number
KR20040055207A
KR20040055207A KR1020020081833A KR20020081833A KR20040055207A KR 20040055207 A KR20040055207 A KR 20040055207A KR 1020020081833 A KR1020020081833 A KR 1020020081833A KR 20020081833 A KR20020081833 A KR 20020081833A KR 20040055207 A KR20040055207 A KR 20040055207A
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South Korea
Prior art keywords
charging
battery
timer
adc value
charge
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KR1020020081833A
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Korean (ko)
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김은주
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엘지전자 주식회사
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Priority to KR1020020081833A priority Critical patent/KR20040055207A/en
Publication of KR20040055207A publication Critical patent/KR20040055207A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

PURPOSE: A method for processing a battery charging operation of a mobile terminal is provided to terminate charging by simultaneously measuring an ADC value of a battery as well as an EOC(End Of Charge). CONSTITUTION: When a battery charging operation starts(201) and a charging mode proceeds(202), software processes a periodically read ADC value, and if the ADC value becomes greater than a certain voltage, the operation of reading the ADC value is stopped. It is determined whether a charging completion timer is still performed(203). If the charging completion timer is not performed, it is determined whether the charging completion timer has been time-out(204). If the charging completion timer has been time-out, the charging completion timer is stopped to terminate the charging operation(208). If the charging completion timer has not been time-out, it is determined whether the ADC value of the battery in charging is greater than a reference voltage(205). If the ADC value of the battery is not greater than the reference voltage, it jumps to a charging mode(202).

Description

이동통신 단말기의 배터리 충전동작 처리방법{Method for processing the battery charge of mobile phone}Method for processing the battery charging operation of the mobile terminal {Method for processing the battery charge of mobile phone}

본 발명은 이동통신 단말기의 배터리 충전동작을 처리하는 방법에 관한 것으로, 특히 충전중인 배터리의 충전종료를 위해 EOC(End of charge) 뿐만 아니라 배터리의 ADC 값을 동시에 측정하여 배터리의 충전종료를 하고자하는 이동통신 단말기의 충전 및 방전 처리방법에 관한 것이다.The present invention relates to a method for processing a battery charging operation of a mobile communication terminal, in particular to end the charging of the battery by simultaneously measuring the ADC value of the battery as well as the end of charge (EOC) The present invention relates to a charging and discharging processing method of a mobile communication terminal.

일반적으로, 이동통신 단말기는 개인이 휴대용으로 사용하므로 에너지를 저장해두는 충전식 배터리를 사용하고 있다. 이러한, 이동통신 단말기에 많이 사용되는 리튬이온 배터리는 초기에는 일정 전류로 4.2V까지 충전을 하고 4.2V에 도달하면, 일정한 전압 4.2V로 충전을 하게 되는데, 배터리의 용량은 배터리로 입력된 전류와 시간을 곱한 양, 즉 전류 그래프를 시간에 대해 적분한 양이 된다.In general, a mobile communication terminal uses a rechargeable battery that stores energy because an individual uses it as a portable device. The lithium ion battery used in many mobile communication terminals initially charges up to 4.2V with a constant current and reaches 4.2V, and then charges with a constant voltage of 4.2V. The product of time multiplied, that is, the current graph integrated over time.

통상적으로 이동통신 단말기에서 사용되는 PM IC(Power Management Chip)에는 두가지 종류가 있으며, 그중에 한가지는 단말기의 배터리를 충전할 때 배터리 셀에 인가되는 전류와 전압을 소프트웨어에서 직접 컨트롤하여 적당한 전압과 전류에서 충전종료를 시키는 방식이고, 다른 한가지는 PM IC가 자체적으로 충전종료를 판단하여 단말기의 메인 칩으로 신호를 보내주면 충전을 종료하는 방식이다.There are two kinds of PM IC (Power Management Chip) used in mobile communication terminals. One of them is the software that directly controls the current and voltage applied to the battery cell when charging the battery of the terminal. The other method is to terminate the charging. The other method is that the PM IC determines the end of charging and sends a signal to the main chip of the terminal to terminate the charging.

본 발명은 상기한 두가지 종류중에서 두번째 방법에 해당하는 기술로서, 그 종래의 방법에 있어서 상기 두번째 방법은 소프트웨어의 충전 알고리즘이 매우 간단해지는 장점은 있으나, PM IC의 동작이 불안하거나 또는 PM IC가 EOC를 판단하기에 알맞은 전류와 전압조건이 주어지지않아 EOC 신호를 보내주지 않으면 충전동작을 한없이 계속함으로써 배터리 셀에 손상을 줄 수 있는 위험한 문제가 있다.The present invention is a technique corresponding to the second method of the above two types, the second method in the conventional method has the advantage that the charging algorithm of the software is very simple, but the operation of the PM IC or the PM IC is EOC There is a dangerous problem that can damage the battery cell by continuing the charging operation without giving the EOC signal because the current and voltage conditions are not given appropriate to determine.

즉, 도 1 에 도시한 바와 같이 종래에는 소프트웨어적인 충전방법에 있어서, 이동통신 단말기의 충전용 배터리에 충전동작이 시작(101)되면 우선 충전기에 충전용 배터리가 꽂힌것을 인식한다.That is, as shown in FIG. 1, in the conventional software charging method, when the charging operation is started to the charging battery of the mobile communication terminal 101, it is first recognized that the rechargeable battery is inserted into the charger.

상기 충전기에 충전용 배터리가 꽂힌것을 인식하게 되면 단말기는 충전모드(202)로 전환되어 무조건 PM IC에 신호를 보내 충전동작을 시작한다.Upon recognizing that the rechargeable battery is inserted into the charger, the terminal switches to the charging mode 202 and unconditionally sends a signal to the PM IC to start the charging operation.

상기 충전동작을 계속하면서 충전기로부터 충전용 배터리가 빠진것이 감지되지 않는 한 계속 충전동작을 진행하다가 PM IC로 부터 충전이 완료되었다는 EOC신호(EOC==TRUE)가 오면(103) PM IC로 다시 신호를 보내 충전기와 물리적으로 차단시켜 충전동작을 종료(104)한다.As long as it is not detected that the rechargeable battery is removed from the charger while continuing the charging operation, when the EOC signal (EOC == TRUE) indicating that the charging is completed from the PM IC is received (103), it is signaled to the PM IC again. Send to physically cut off the charger to terminate the charging operation (104).

상기와 같은 종래의 충전 방법에서는 PM IC의 동작이 불안하거나 또는 PM IC가 EOC를 판단하기에 알맞은 전류와 전압조건이 주어지지않아 EOC 신호를 보내주지 않으면 충전동작을 한없이 계속함으로써 배터리 셀에 손상을 줄 수 있는 심각한 문제가 있다.In the conventional charging method as described above, if the operation of the PM IC is unstable or if the PM IC is not given the current and voltage conditions suitable for determining the EOC, and the EOC signal is not sent, the charging operation continues without limitation. There is a serious problem that can be given.

따라서, 본 발명은 상기한 종래의 문제점을 해결하기 위하여 제안한 것으로, 이동통신 단말기의 배터리 충전중에 충전종료를 위해 EOC(End of charge) 뿐만 아니라 배터리의 ADC 값을 동시에 측정하여 충전종료를 하고자하는 이동통신 단말기의 배터리 충전동작 처리방법을 제공함에 그 목적이 있다.Therefore, the present invention has been proposed to solve the above-described problems, the mobile end of the charge during the charging of the end of the charge to the end of charge (EOC) as well as the movement to end the charge by measuring the ADC value of the battery at the same time It is an object of the present invention to provide a method for processing a battery charging operation of a communication terminal.

상기한 목적을 달성하기 위하여 본 발명은 이동통신 단말기의 배터리장치를 충전하는 방법에 있어서,In order to achieve the above object, the present invention provides a method for charging a battery device of a mobile communication terminal,

충전용 배터리를 충전시키는 충전모드에서 충전종료 타이머를 두고 충전종료 타이머가 계속 진행중이면 PM IC로 부터의 EOC신호에 따라 충전을 종료시키고 충전종료 타이머를 리세트시키는 단계와,In the charging mode for charging the rechargeable battery, if the end of charge timer is in progress and ends the charge according to the EOC signal from the PM IC, resetting the end of charge timer;

상기 충전종료 타이머가 계속 진행중이 아니면 충전종료 타이머가 타임아웃 되었을때 충전을 종료하는 단계와,Terminating the charging when the charging stop timer is timed out if the charging stop timer is not in progress;

상기 충전종료 타이머가 타임아웃되지 않았으면 배터리의 ADC값을 기준전압과 비교하여 그 결과에따라 충전종료 타이머를 제어하는 단계를 포함하여 이루어진 다.If the charge end timer has not timed out, comparing the ADC value of the battery with a reference voltage and controlling the charge end timer according to the result.

상기 충전종료는 PM IC로 부터의 EOC신호 및 PM IC의 ADC값을 이용 하고,The end of the charge using the EOC signal from the PM IC and the ADC value of the PM IC,

상기 충전동작이 시작되면 수초간격의 주기적으로 충전중인 배터리의 레벨값을 읽도록 하며,When the charging operation is started to read the level value of the battery being periodically charged at intervals of several seconds,

상기 배터리의 ADC값을 기준전압과 비교한 결과 배터리의 ADC값이 기준전압보다 크면 충전종료 타이머를 시작하도록한다.When the ADC value of the battery is compared with the reference voltage and the ADC value of the battery is greater than the reference voltage, the end of charge timer is started.

상기 PM IC로 부터의 EOC신호는 EOC==TRUE일때 충전동작을 종료시키도록 하고,The EOC signal from the PM IC terminates the charging operation when EOC == TRUE.

상기 충전종료 타이머의 타임아웃 기간과 기준전압은 배터리 셀의 특성에 맞게 설정해준다.The timeout period and the reference voltage of the charge end timer are set according to the characteristics of the battery cell.

도 1 은 종래의 실시예에 따른 동작흐름을 나타내는 플로우차트.1 is a flowchart showing an operation flow according to a conventional embodiment.

도 2 는 본 발명의 실시예에 따른 충전용 배터리의 전반적인 동작흐름을 나타내는 플로우차트.2 is a flowchart showing the overall operation of the rechargeable battery according to an embodiment of the present invention.

이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하면 다음과같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2 는 본 발명의 실시예에 따른 충전용 배터리의 전반적인 충전동작을 나타내는 플로우차트이다.2 is a flowchart showing an overall charging operation of a rechargeable battery according to an embodiment of the present invention.

도 2 에서 본 발명은 이동통신 단말기의 충전중인 배터리의 충전종료 판단을 EOC에만 의존하지 않고 PM IC의 배터리 ADC값(배터리의 전압레벨을 디지털로 변환한 값)을 이용하여 충전 알고리즘을 보안한 것이다.In FIG. 2, the present invention secures a charging algorithm by using a battery ADC value of a PM IC (a value obtained by converting a battery's voltage level to a digital value) without relying only on the EOC to determine the end of charging of the battery being charged by the mobile communication terminal. .

이동통신 단말기의 충전용 배터리에 충전동작이 시작(201)되면 소프트웨어는 수 초 간격의 주기적으로 충전기에 꽂혀있는 충전용 배터리의 레벨값을 읽는다.When the charging operation is started on the rechargeable battery of the mobile communication terminal 201, the software reads the level value of the rechargeable battery plugged into the charger periodically at intervals of several seconds.

상기 배터리에 충전동작이 시작(201)되어 충전모드(202)로 진행이되면 소프트웨어는 상기 주기적으로 읽은 ADC값을 처리하고, 이 ADC값이 일정전압 이상이 되면 ADC값을 읽는 동작을 중지한다.When the battery starts charging 201 and proceeds to the charging mode 202, the software processes the periodically read ADC value, and stops reading the ADC value when the ADC value reaches a predetermined voltage or more.

상기 ADC값을 읽는 동작을 중지한 후 일정시간이 경과되면 타임아웃되는 충전종료 타이머를 시작하고, 충전종료 타이머가 계속 진행중인지를 판단(203)하여 충전종료타이머가 계속 진행중이 아니면 충전종료 타이머가 타임아웃 되었는지 판단(204)한다.After stopping the operation of reading the ADC value, the charging end timer starts to time out when a certain time elapses, and it is determined whether the charging end timer is in progress (203), and if the charging end timer is not in progress, the charging end timer is timed out. It is determined whether it is out (204).

상기 충전종료 타이머가 타임아웃 되었는지 판단(204)한 결과 충전종료 타이머가 타임아웃 되었으면 종료 타이머를 스톱하여 충전동작을 모두 종료(208)하고, 상기 충전종료 타이머가 타임아웃 되었는지 판단(204)한 결과 충전종료 타이머가 아직 타임아웃 되지 않았으면 충전중인 배터리의 ADC값이 기준전압보다 큰지 작은지 판단(205)한다.As a result of determining whether the charging end timer has timed out (204), if the charging end timer has timed out, all of the charging operations are terminated by stopping the termination timer (208), and determining whether the charging end timer has timed out (204). If the charge end timer has not yet timed out, it is determined whether the ADC value of the battery being charged is greater or less than the reference voltage (205).

상기 충전중인 배터리의 ADC값이 기준전압보다 큰지 작은지 판단(205)한 결과 배터리의 ADC값이 기준전압보다 크지 않으면 상기 충전모드단계(202)로 점프하여 진행하고, 상기 충전중인 배터리의 ADC값이 기준전압보다 큰지 작은지 판단(205)한 결과 배터리의 ADC값이 기준전압보다 크면 충전종료 타이머를 시작(206)한 다음 상기 충전모드단계(202)로 점프하여 진행한다.If the ADC value of the battery that is being charged is greater than or equal to the reference voltage (205), if the ADC value of the battery is not greater than the reference voltage, the process jumps to the charging mode step 202 and proceeds to the ADC value of the battery being charged. If the ADC value of the battery is greater than the reference voltage as a result of determining (205) whether it is greater than or equal to the reference voltage (205), the charging end timer is started (206) and then jumps to the charging mode step (202) to proceed.

상기 충전종료 타이머의 타임아웃 기간과 기준전압은 테스트를 통해 배터리 셀의 특성에 맞게 설정해준다.The timeout period and the reference voltage of the charge end timer are set according to the characteristics of the battery cell through a test.

상기 충전종료 타이머가 계속 진행중인지를 판단(203)한 결과 충전종료 타이머가 계속 진행중이면 PM IC로 부터 충전이 완료되었다는 EOC신호(EOC==TRUE)가 왔는지 오지않았는지 판단(207)하여 아직 오지 않았으면 상기 충전모드단계(202)로 점프하여 진행하고, 상기 PM IC로 부터 충전이 완료되었다는 EOC신호(EOC==TRUE)가 오면(103) PM IC로 다시 신호를 보내 충전기와 물리적으로 차단시켜 충전동작을 종료(208)한다.As a result of determining whether the end of charging timer is in progress (203), if the end of charging timer is in progress, it is determined whether or not an EOC signal (EOC == TRUE) indicating that the charging is completed has come or not (207). If the EOC signal (EOC == TRUE) indicating that the charging is completed from the PM IC (103), the signal is sent back to the PM IC to physically block and charge the charger. The operation ends (208).

이와같이 충전종료 타이머가 타임아웃 될때까지 PM IC로 부터 EOC신호가 오지 않으면 타임아웃 되었을때 충전을 종료한다.As such, if the EOC signal does not come from the PM IC until the end of charge timer has timed out, charging is terminated when it has timed out.

여기에서 만일 타이머가 타임아웃 되기전에 PM IC로 부터 EOC신호가 발생하는 경우 충전을 종료시키고 충전종료 타이머를 리세트(reset)한다.Here, if the EOC signal is generated from the PM IC before the timer times out, the charging is terminated and the charging stop timer is reset.

이상에서 상세히 설명한 바와같이 본 발명은 이동통신 단말기의 배터리 충전중에 충전종료를 위해 EOC(End of charge) 뿐만 아니라 배터리의 ADC 값을 동시에 측정하여 충전종료를 함으로써 PM IC의 동작이 안정되고, PM IC가 EOC를 판단하기에 알맞은 전류와 전압조건이 형성됨으로써 충전동작이 안정되어 배터리 셀에 손상을 줄 염려가 전혀없는 유용한 효과를 제공한다.As described in detail above, the present invention stabilizes the operation of the PM IC by simultaneously terminating the charge by measuring the ADC value of the battery as well as the end of charge (EOC) for the termination of the charging of the mobile communication terminal. The current and voltage conditions suitable for determining the EOC are formed, so that the charging operation is stabilized, thereby providing a useful effect with no fear of damaging the battery cells.

Claims (6)

이동통신 단말기의 배터리장치를 충전하는 방법에 있어서,In the method for charging the battery device of the mobile communication terminal, 충전용 배터리를 충전시키는 충전모드에서 충전종료 타이머를 두고 충전종료 타이머가 계속 진행중이면 PM IC로 부터의 EOC신호에 따라 충전을 종료시키고 충전종료 타이머를 리세트시키는 단계와,In the charging mode for charging the rechargeable battery, if the end of charge timer is in progress and ends the charge according to the EOC signal from the PM IC, resetting the end of charge timer; 상기 충전종료 타이머가 계속 진행중이 아니면 충전종료 타이머가 타임아웃 되었을때 충전을 종료하는 단계와,Terminating the charging when the charging stop timer is timed out if the charging stop timer is not in progress; 상기 충전종료 타이머가 타임아웃되지 않았으면 배터리의 ADC값을 기준전압과 비교하여 그 결과에따라 충전종료 타이머를 제어하는 단계를 포함하여 이루어진 것을 특징으로 하는 이동통신 단말기의 배터리 충전동작 처리방법.And comparing the ADC value of the battery with a reference voltage and controlling the charging end timer according to the result if the charging end timer has not timed out. 청구항 1 항에 있어서,The method according to claim 1, 상기 충전종료는 PM IC로 부터의 EOC신호 및 PM IC의 ADC값을 이용한 것이 특징인 이동통신 단말기의 배터리 충전동작 처리방법.The charging end is a battery charging operation processing method of the mobile communication terminal, characterized in that using the EOC signal from the PM IC and the ADC value of the PM IC. 청구항 1 항에 있어서,The method according to claim 1, 상기 충전동작이 시작되면 수초간격의 주기적으로 충전중인 배터리의 레벨값을 읽는 것이 특징인 이동통신 단말기의 배터리 충전동작 처리방법.When the charging operation is started, the battery charging operation processing method of the mobile communication terminal, characterized in that for reading the level value of the battery being periodically charged at intervals of several seconds. 청구항 1 항에 있어서,The method according to claim 1, 상기 배터리의 ADC값을 기준전압과 비교한 결과 배터리의 ADC값이 기준전압보다 크면 충전종료 타이머를 시작하도록한 것이 특징인 이동통신 단말기의 배터리 충전동작 처리방법.And comparing the ADC value of the battery with a reference voltage and starting the charging end timer if the ADC value of the battery is greater than the reference voltage. 청구항 1 항에 있어서,The method according to claim 1, 상기 PM IC로 부터의 EOC신호는 EOC==TRUE일때 충전동작을 종료시키도록한 것이 특징인 이동통신 단말기의 배터리 충전동작 처리방법.And the EOC signal from the PM IC terminates the charging operation when EOC == TRUE. 청구항 1 항에 있어서,The method according to claim 1, 상기 충전종료 타이머의 타임아웃 기간과 기준전압은 배터리 셀의 특성에 맞게 설정해준 것이 특징인 이동통신 단말기의 배터리 충전동작 처리방법.The battery charging operation processing method of the mobile terminal, characterized in that the timeout period and the reference voltage of the charge end timer is set according to the characteristics of the battery cell.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9052369B2 (en) 2011-10-28 2015-06-09 Samsung Electronics Co., Ltd Method and apparatus for measuring a remaining capacity of a battery when charging constant current/constant voltage mode in a portable terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9052369B2 (en) 2011-10-28 2015-06-09 Samsung Electronics Co., Ltd Method and apparatus for measuring a remaining capacity of a battery when charging constant current/constant voltage mode in a portable terminal

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