Battery control device, battery control method, battery pack, electronic apparatus and control circuit for calculating charging-discharging count of battery
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/00
G06F-017/40
출원번호
UP-0858303
(2007-09-20)
등록번호
US-7693671
(2010-05-20)
우선권정보
JP-2006-312046(2006-11-17)
발명자
/ 주소
Okumura, Masafumi
Fukuda, Hideo
출원인 / 주소
Fujitsu Limited
인용정보
피인용 횟수 :
4인용 특허 :
5
초록▼
A battery control device includes a unit to measure a voltage of a battery, a unit to measure an electric current of the battery, and a control unit to calculate an open-circuit voltage of the battery based on the voltage and the electric current of the battery, and to calculate a battery residual q
A battery control device includes a unit to measure a voltage of a battery, a unit to measure an electric current of the battery, and a control unit to calculate an open-circuit voltage of the battery based on the voltage and the electric current of the battery, and to calculate a battery residual quantity ratio of the battery by use of relative information and the calculated open-circuit voltage, wherein the control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio at charge ending time from a battery residual quantity ratio at charge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated.
대표청구항▼
What is claimed is: 1. A battery control device comprising: a voltage measuring unit to measure a voltage of a battery; a current measuring unit to measure an electric current of the battery; and a power source control unit to calculate an open-circuit voltage of the battery based on the voltage of
What is claimed is: 1. A battery control device comprising: a voltage measuring unit to measure a voltage of a battery; a current measuring unit to measure an electric current of the battery; and a power source control unit to calculate an open-circuit voltage of the battery based on the voltage of the battery and the electric current of the battery, and to calculate a battery residual quantity ratio of the battery by use of relative information representing a relationship between the battery residual quantity ratio defined as a value representing a ratio of a residual quantity of the battery to a total capacity of the battery and the open-circuit voltage, and by use of the calculated open-circuit voltage, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at charge ending time from a battery residual quantity ratio of the battery at charge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 2. A battery control device according to claim 1, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at discharge ending time from a battery residual quantity ratio of the battery at discharge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 3. A battery control device according to claim 1, wherein the power source control unit, if the charging-discharging count exceeds a predetermined value, calculates the predetermined value as the charging-discharging count and, if the charging-discharging count does not exceed the predetermined value, calculates, as the charging-discharging count, a value obtained by multiplying the charge quantity ratio by the correction coefficient. 4. A battery control device according to claim 1, wherein the correction coefficient is a value calculated based on a discharge capacity of the battery that decreases due to deterioration of the battery. 5. A battery control method comprising: measuring a voltage of a battery; measuring an electric current of the battery; calculating an open-circuit voltage of the battery based on the voltage of the battery and the electric current of the battery, and calculating a battery residual quantity ratio of the battery by use of relative information representing a relationship between the battery residual quantity ratio defined as a value representing a ratio of a residual quantity of the battery to a total capacity of the battery and the open-circuit voltage, and by use of the calculated open-circuit voltage; and calculating a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at charge ending time from a battery residual quantity ratio of the battery at charge starting time, calculating a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrating the charging-discharging count each time the charging-discharging count is calculated. 6. A battery control method according to claim 5, further comprising calculating a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at discharge ending time from a battery residual quantity ratio of the battery at discharge starting time, calculating a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrating the charging-discharging count each time the charging-discharging count is calculated. 7. A battery control method according to claim 5, further comprising if the charging-discharging count exceeds a predetermined value, calculating the predetermined value as the charging-discharging count and, if the charging-discharging count does not exceed the predetermined value, calculating, as the charging-discharging count, a value obtained by multiplying the charge quantity ratio by the correction coefficient. 8. A battery control method according to claim 5, wherein the correction coefficient is a value calculated based on a discharge capacity of the battery that decreases due to deterioration of the battery. 9. A battery pack comprising: a voltage measuring unit to measure a voltage of a battery; a current measuring unit to measure an electric current of the battery; and a power source control unit to calculate an open-circuit voltage of the battery based on the voltage of the battery and the electric current of the battery, and to calculate a battery residual quantity ratio of the battery by use of relative information representing a relationship between the battery residual quantity ratio defined as a value representing a ratio of a residual quantity of the battery to a total capacity of the battery and the open-circuit voltage, and by use of the calculated open-circuit voltage, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at charge ending time from a battery residual quantity ratio of the battery at charge starting time, calculates a value obtained by the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 10. A battery pack according to claim 9, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at discharge ending time from a battery residual quantity ratio of the battery at discharge starting time, calculates a value obtained by the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 11. A battery pack according to claim 9, wherein the power source control unit, if the charging-discharging count exceeds a predetermined value, calculates the predetermined value as the charging-discharging count and, if the charging-discharging count does not exceed the predetermined value, calculates, as the charging-discharging count, a value obtained by multiplying the charge quantity ratio by the correction coefficient. 12. A battery pack according to claim 9, wherein the correction coefficient is a value calculated based on a discharge capacity of the battery that decreases due to deterioration of the battery. 13. A battery pack according to claim 9, wherein the battery pack is constructed attachably and detachably to and from an electronic apparatus including a load and, when attached to the electronic apparatus, supplies driving electric power to the load from the battery. 14. An electronic apparatus driving a load by electric power supplied from a battery, comprising: a voltage measuring unit to measure a voltage of a battery; a current measuring unit to measure an electric current of the battery; and a power source control unit to calculate an open-circuit voltage of the battery based on the voltage of the battery and the electric current of the battery, and to calculate a battery residual quantity ratio of the battery by use of relative information representing a relationship between the battery residual quantity ratio defined as a value representing a ratio of a residual quantity of the battery to a total capacity of the battery and the open-circuit voltage, and by use of the calculated open-circuit voltage, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at charge ending time from a battery residual quantity ratio of the battery at charge starting time, calculates a value obtained by the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 15. An electronic apparatus according to claim 14, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at discharge ending time from a battery residual quantity ratio of the battery at discharge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 16. An electronic apparatus according to claim 14, wherein the power source control unit, if the charging-discharging count exceeds a predetermined value, calculates the predetermined value as the charging-discharging count and, if the charging-discharging count does not exceed the predetermined value, calculates, as the charging-discharging count, a value obtained by multiplying the charge quantity ratio by the correction coefficient. 17. An electronic apparatus according to claim 14, wherein the correction coefficient is a value calculated based on a discharge capacity of the battery that decreases due to deterioration of the battery. 18. An electronic apparatus according to claim 14, wherein the battery includes a recording unit, and the power source control unit records the integrated charging-discharging count in the recording unit. 19. An electronic apparatus according to claim 18, wherein the battery is an attachable-detachable battery. 20. An electronic apparatus according to claim 14, wherein the power source control unit, when supplied with the electric power from an external power source, executes control of supplying the electric power to the load. 21. An electronic apparatus according to claim 20, wherein the power source control unit executes the control of charging the battery with the electric power from the external power source. 22. A computer readable storage medium storing a battery control program, making a computer perform the functions of a battery control device by executing: measuring a voltage of a battery; measuring an electric current of the battery; calculating an open-circuit voltage of the battery based on the voltage of the battery and the electric current of the battery, and calculating a battery residual quantity ratio of the battery by use of relative information representing a relationship between the battery residual quantity ratio defined as a value representing a ratio of a residual quantity of the battery to a total capacity of the battery and the open-circuit voltage, and by use of the calculated open-circuit voltage; and calculating a charge quantity ratio of the battery by subtracting a battery residual quantity ratio at charge ending time from a battery residual quantity ratio of the battery at charge starting time, calculating a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrating the charging-discharging count each time the charging-discharging count is calculated. 23. A computer readable storage medium storing a battery control program according to claim 22, further making the battery control device execute calculating a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at discharge ending time from a battery residual quantity ratio of the battery at discharge starting time, calculating a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrating the charging-discharging count each time the charging-discharging count is calculated. 24. A computer readable storage medium storing a battery control program according to claim 22, further making the battery control device execute, if the charging-discharging count exceeds a predetermined value, calculating the predetermined value as the charging-discharging count and, if the charging-discharging count does not exceed the predetermined value, calculating, as the charging-discharging count, a value obtained by multiplying the charge quantity ratio by the correction coefficient. 25. A computer readable storage medium storing a battery control program according to claim 22, wherein the correction coefficient is a value calculated based on a discharge capacity of the battery that decreases due to deterioration of the battery. 26. A control circuit of a battery control device including a voltage measuring unit to measure a voltage of a battery and a current measuring unit to measure an electric current of the battery, and controlling a charging-discharging count of the battery, the control circuit comprising: a power source control unit to calculate an open-circuit voltage of the battery based on the measured voltage of the battery and the measured electric current of the battery, and calculating a battery residual quantity ratio of the battery by use of relative information representing a relationship between the battery residual quantity ratio defined as a value representing a ratio of a residual quantity of the battery to a total capacity of the battery and the open-circuit voltage, and by use of the calculated open-circuit voltage, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at charge ending time from a battery residual quantity ratio of the battery at charge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 27. A control circuit according to claim 26, wherein the power source control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio of the battery at discharge ending time from a battery residual quantity ratio of the battery at discharge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated. 28. A control circuit according to claim 26, wherein the power source control unit, if the charging-discharging count exceeds a predetermined value, calculates the predetermined value as the charging-discharging count and, if the charging-discharging count does not exceed the predetermined value, calculates, as the charging-discharging count, a value obtained by multiplying the charge quantity ratio by the correction coefficient. 29. A control circuit according to claim 26, wherein the correction coefficient is a value calculated based on a discharge capacity of the battery that decreases due to deterioration of the battery.
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