JPS6483172A - Checking circuit of residual capacity of battery - Google Patents
Checking circuit of residual capacity of batteryInfo
- Publication number
- JPS6483172A JPS6483172A JP62238817A JP23881787A JPS6483172A JP S6483172 A JPS6483172 A JP S6483172A JP 62238817 A JP62238817 A JP 62238817A JP 23881787 A JP23881787 A JP 23881787A JP S6483172 A JPS6483172 A JP S6483172A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- load
- residual capacity
- large current
- 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)
Abstract
PURPOSE:To prevent a variation in a battery voltage from affecting a load even when the residual capacity of a battery is checked by a flow of a large current therethrough, by a method wherein the backflow of a voltage on the lead side onto the battery side is prevented by a backflow preventing means provided on a power line. CONSTITUTION:A current from a battery 1 is supplied to a load 2 through a diode (D) 6, and a voltage of the battery 1 is accumulated in a capacitor 3 through (D) 6. Since the load 2 designed to operate with a relatively low current, the voltage of the battery 1 drops little. When a transistor (T) 42 is turned ON momentarily by a control circuit of the load 2 so as to enlarge this little drop of the voltage for detection, a large current flows from the battery 1 through a resistor 41 and T 42. Consequently, the voltage of the battery 1 drops to a battery voltage caused by the large current. Accordingly, the residual capacity of the battery 1 can be checked by detecting the state of the drop of the voltage thereof by a voltage detector 5 in the above-stated condition. By connecting (D)6, a backflow preventing means, between the battery 1 and the load 2, a false operation of the load 2 due to the effect of the lowered voltage of the battery 1 can be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238817A JPS6483172A (en) | 1987-09-25 | 1987-09-25 | Checking circuit of residual capacity of battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238817A JPS6483172A (en) | 1987-09-25 | 1987-09-25 | Checking circuit of residual capacity of battery |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6483172A true JPS6483172A (en) | 1989-03-28 |
Family
ID=17035722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62238817A Pending JPS6483172A (en) | 1987-09-25 | 1987-09-25 | Checking circuit of residual capacity of battery |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6483172A (en) |
-
1987
- 1987-09-25 JP JP62238817A patent/JPS6483172A/en active Pending
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