Method and apparatus for battery control

• US 5,363,312 A
• Filed: 03/09/1993
• Issued: 11/08/1994
• Est. Priority Date: 03/30/1990
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Ninomiya, Ryozi
• Primary Examiner(s): Teska, Kevin J.
• Application Number:
  US08/029,967
• Time in Patent Office: 609 Days
• Field of Search: 320/2, 320/38, 320/40, 320/48, 320/20, 320/37, 320/30, 320/32, 364/481, 364/483, 364/571.01, 364/571.03, 364/571.07, 324/431, 324/433, 324/430, 324/434, 340/636, 340/660, 340/661, 340/662, 340/663
• US Class Current: 702/63
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage

Abstract

In a power supply control apparatus capable of connecting an AC adapter, it is determined by a controller whether or not the AC adapter is connected. When a battery is set in the apparatus, it is determined whether the battery is in a low battery state. When the AC adapter is connected and the set battery is in a low battery state, charge operation for the battery is started. During charging, a charged state is monitored on the basis of the current value detected by a current detector and a charge time measured by a timer. When the charge amount exceeds a predetermined amount, or the charge time exceeds a predetermined charge time, the charge operation is completed and the battery is used as a power supply.

Claims

1. A battery power supply control apparatus for controlling power supply of a battery set in the apparatus, the apparatus comprising:

a controller;

checking means, operatively communicating with the set battery and the controller, for checking whether or not a charge amount of the set battery is in a low state;

charging means, controlled by the controller, for charging the set battery when the checking means communicates to the controller that the charge amount of the set battery is in the low state;

timer means, operatively communicating with the controller, for starting a time count value when the charging means commences charging the set battery; and

determining means, operatively communicating with the controller, for determining whether or not the time count value exceeds a desired time value, the controller stopping the charging means from charging the set battery in response to a predetermined count of the time count value communicated by the determining means.

2. The apparatus according to claim 1, wherein the determining means further determines whether or not a desired charge amount for the set battery is obtained, the controller stopping the charging means from charging the set battery when the determining means communicates to the controller that the desired charge amount is obtained.

3. The apparatus according to claim 1, further comprising establishing means, operatively communicating with the controller, for establishing that the set battery is set in the apparatus prior to the checking means checking whether or not the charge amount of the set battery is in the low state.

4. The apparatus according to claim 1, wherein the predetermined count of the time count value is when the time count value is determined to exceed at least a first time value corresponding to a rapid time charge.

5. The apparatus according to claim 4, wherein the predetermined count of the time count value is when the time count value is determined to exceed a second time value of greater duration than the first time value, the second time value corresponding to a normal charge time.

6. A battery power supply control method for controlling power supply of at least one battery, the method comprising the steps of:

checking whether or not a charge amount of the at least one battery is in a low state;

charging the at least one battery when the charge amount of the at least one battery is checked to be in the low state;

starting a time count value when the charging of the at least one battery commences;

determining whether or not the time count value exceeds a desired time value; and

stopping the charging of the at least one battery in response to a predetermined count of the time count value.

7. The method according to claim 6, wherein the predetermined count of the time count value is when the time count value is determined to exceed the desired time value.

8. The method according to claim 6, wherein the determining step further includes the step of determining whether or not a desired charge amount for the at least one battery is obtained;

and

the stopping step comprises stopping the charging of the at least one battery either in response to the predetermined count of the time count value or when the desired charge amount is obtained.

9. A battery power supply control apparatus for controlling power supply of a battery set in the apparatus, the apparatus comprising:

a power source, coupled to the set battery, for supplying power from the set battery to a load;

checking means, coupled to the set battery, for checking whether or not a charge amount of the set battery is in a low state;

charging means for charging the set battery when the checking means indicates that the charge amount of the set battery is in the low state;

timer means for starting a time count value when the charging means commences charging the set battery, said charging means stopping charging of the set battery in response to a predetermined count of the time count value; and

control means, coupled to the checking means, for inhibiting the power source from supplying power from the set battery to the load until at least one of the charge amount of the battery and the time count value from said timer means reaches a predetermined value.

10. The apparatus according to claim 9, further comprising:

timer means for starting a time count value when the charging means commences charging the set battery,

wherein the control means inhibits the power source from supplying power from the set battery to the load until the charge amount of the battery reaches the predetermined value and the time count value reaches a predetermined count.

11. The apparatus according to claim 10, wherein the control means stops the charging means from charging the set battery when the time count value reaches the predetermined count.

12. The apparatus according to claim 11, wherein the predetermined count of the time count value is when the time count value reaches a first time value corresponding to a rapid time charge.

13. The apparatus according to claim 11, wherein the predetermined count of the time count value is when the time count value reaches a desired time value.

14. A battery power supply control apparatus for controlling power supply of a battery set in the apparatus, the apparatus comprising:

a power source, coupled to the set battery, for supplying power to a load;

charging means for charging the set battery when the charge amount of the set battery is in the low state; and

a controller for detecting whether a charge amount of the set battery is in a low state, for starting a time count value in timer means When the charging means commences charging the set battery, said charging means stopping charging of the set battery in response to a predetermined count of the time count value, and for inhibiting the power source from supplying power from the set battery to the load until at least one of the charge amount of the battery and the time count value from said timer means reaches a predetermined value.

15. The apparatus according to claim 14, further comprising:

timer means for starting a time count value when the charging means commences charging the set battery,

wherein the controller inhibits the power source from supplying power from the set battery to the load until the charge amount of the battery reaches the predetermined value and the time count value reaches a predetermined count.

16. The apparatus according to claim 15, wherein the predetermined count of the time count value is when the time count value reaches a first time value corresponding to a rapid time charge.

17. The apparatus according to claim 15, wherein the predetermined count of the time count value is when the time count value reaches a desired time value.

18. The apparatus according to claim 15, wherein the controller stops the charging means from charging the set battery when the time count value reaches the predetermined count.

19. A computer having a system board, comprising:

a battery;

a power source, coupled to the battery, for supplying power from the battery to the system board;

charging means for charging the battery when a charge amount of the battery is in a low state;

timer means for starting a time count value when the charging means commences charging the battery, said charging means stopping charging of the battery in response to a predetermined count of the time count value; and

a controller for detecting whether a charge amount of the battery is in the low state, and for inhibiting the power source from supplying power from the battery to the system board until at least one of the charge amount of the battery and the time count value reaches a predetermined value.

20. The computer according to claim 19, further comprising:

timer means for starting a time count value when the charging means commences charging the battery,

wherein the controller inhibits the power source from supplying power from the battery to the system board until the charge amount of the battery reaches the predetermined value and the time count value reaches a predetermined count.

21. A portable computer having a system board, comprising:

a battery set in the portable computer;

a power source, coupled to the set battery, for supplying power to the system board;

detecting means for detecting whether or not a charge amount of the set battery is in a low state;

charging means for charging the set battery when the detecting means indicates that the charge amount of the set battery is in the low state;

timer means for starting a time count value when the charging means commences charging the set battery, said charging means stopping charging of the set battery in response to a predetermined count of the time count value; and

control means for inhibiting, when the detecting means detects that the charge amount of the battery is in a low state, the power source from supplying power from the set battery to the system until at least one of the charge amount of the set battery and the time count value reaches a predetermined value.

22. A battery power supply control apparatus for controlling power supply of a battery set in the apparatus, the apparatus comprising:

a power source, coupled to the set battery, for supplying power to a load;

detecting means for detecting whether or not a charge amount of the set battery is in a low state;

charging means for charging the set battery when the detecting means detects that the charge amount of the set battery is in the low state; and

control means for inhibiting the power source from supplying power from the set battery to the load until the charge amount of the battery reaches a predetermined value.

23. A battery power supply control apparatus for controlling power supply of a battery set in the apparatus, the apparatus comprising:

a power source, coupled to the set battery, for supplying power to a system board;

detecting means for detecting whether or not a charge amount of the set battery is in a low state;

charging means for charging the set battery when the detecting means detects that the charge amount of the set battery is in a low state;

timer means for starting a time count value when the charging means commences charging the set battery; and

control means for inhibiting the power source from supplying power from the set battery to the system board until the time count value reaches a predetermined count.

24. The apparatus according to claim 23, wherein the control means stops the charging means from charging the set battery when the time count value reaches the predetermined count.

25. The apparatus according to claim 24, wherein the predetermined count of the time count value is when the time count value reaches a desired time value.

26. A portable computer having a system board, comprising:

a battery;

a power source, coupled to the battery, for supplying power to the system board;

detecting means for detecting whether or not a charge amount of the battery is in a low state;

charging means for charging the battery when the detecting means detects that the charge amount of the battery is in a low state;

timer means for starting a time count value when the charging means commences charging the battery; and

control means for inhibiting the power source from supplying power from the battery to the system board until the time count value reaches a predetermined count.

27. The apparatus according to claim 26, wherein the control means stops the charging means from charging the battery when the time count value reaches the predetermined count condition].

28. The apparatus according to claim 27, wherein the predetermined count of the time count value is when the time count value reaches a desired time value.

29. A battery power supply control apparatus for controlling the power supply of a battery set in the apparatus, the apparatus comprising:

a power source, coupled to the set battery, for supplying power to a load;

charging means for charging the set battery when a charge amount of the set battery is in a low state; and

a controller for detecting whether a charge amount of the set battery is in the low state, for monitoring a charge time value of the set battery, and for inhibiting the power source from supplying power from the set battery to the load until at least one of the charge amount of the battery and the charge time value reaches a predetermined value.

30. A battery power supply control apparatus for controlling power supply of a battery set in the apparatus, the apparatus comprising:

a power source, coupled to the set battery, for supplying power from the set battery to a load;

charging means for charging the set battery when a charge amount of the set battery is in a low state;

monitoring means for monitoring a charge time value of the charging means; and

a controller for detecting whether a charge amount of the set battery is in a low state, and for inhibiting the power source from supplying power from the set battery to the load until at least one of the charge amount of the battery and the charge time value from the monitoring means reaches a predetermined value.