JPS6459176A - Power source circuit - Google Patents
Power source circuitInfo
- Publication number
- JPS6459176A JPS6459176A JP62217672A JP21767287A JPS6459176A JP S6459176 A JPS6459176 A JP S6459176A JP 62217672 A JP62217672 A JP 62217672A JP 21767287 A JP21767287 A JP 21767287A JP S6459176 A JPS6459176 A JP S6459176A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- time
- load
- switch
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Tests Of Electric Status Of Batteries (AREA)
- Power Sources (AREA)
Abstract
PURPOSE:To more accurately monitor the residual capacity of a battery, by a method wherein detected voltage changes in conjunction with the switch of a power source circuit and the detected voltage at the time of load is made lower than that at the time of non-load. CONSTITUTION:The output voltage of a reference voltage generator 6 is obtained in conjunction with a switch 4 and the voltage at the open time of the switch 4 is set to VRH and the voltage at the close time of the switch 4 is set to VRL. Then, VRH is set to non-load voltage when the capacity of a battery 3 is almost lost and VRL is set to the voltage when a current is supplied to a load 2 when the capacity is almost lost. When the switch 4 is closed, the battery 3 is reduced in its capacity by self-discharge and voltage B is dropped. At the time of VB<VRH, a comparator 5 outputs LOW. When the switch 4 is closed, the battery 3 is discharged at the load 2 and, at the time of VB<VRL, the comparator 5 outputs LOW to issue an alarm. As mentioned above, by differentiating the detected voltage at the time of load from that at the time of non-load, the residual capacity of the battery is more accurately monitored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62217672A JPS6459176A (en) | 1987-08-31 | 1987-08-31 | Power source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62217672A JPS6459176A (en) | 1987-08-31 | 1987-08-31 | Power source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6459176A true JPS6459176A (en) | 1989-03-06 |
Family
ID=16707912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62217672A Pending JPS6459176A (en) | 1987-08-31 | 1987-08-31 | Power source circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6459176A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05111170A (en) * | 1991-10-11 | 1993-04-30 | Yamaha Corp | Battery driven electronic appliance |
| JPH07218562A (en) * | 1994-01-31 | 1995-08-18 | Nec Corp | Electric power source apparatus |
| CN100397745C (en) * | 2004-03-05 | 2008-06-25 | 日立工机株式会社 | Battery-powered tool capable of detecting discharged battery pack |
| CN112739603A (en) * | 2018-09-19 | 2021-04-30 | 克诺尔转向系统日本有限公司 | Steering device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6258568B2 (en) * | 1980-05-06 | 1987-12-07 | Nippon Electric Co |
-
1987
- 1987-08-31 JP JP62217672A patent/JPS6459176A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6258568B2 (en) * | 1980-05-06 | 1987-12-07 | Nippon Electric Co |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05111170A (en) * | 1991-10-11 | 1993-04-30 | Yamaha Corp | Battery driven electronic appliance |
| JPH07218562A (en) * | 1994-01-31 | 1995-08-18 | Nec Corp | Electric power source apparatus |
| CN100397745C (en) * | 2004-03-05 | 2008-06-25 | 日立工机株式会社 | Battery-powered tool capable of detecting discharged battery pack |
| CN112739603A (en) * | 2018-09-19 | 2021-04-30 | 克诺尔转向系统日本有限公司 | Steering device |
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