JPS56664A - Battery display unit - Google Patents
Battery display unitInfo
- Publication number
- JPS56664A JPS56664A JP7527179A JP7527179A JPS56664A JP S56664 A JPS56664 A JP S56664A JP 7527179 A JP7527179 A JP 7527179A JP 7527179 A JP7527179 A JP 7527179A JP S56664 A JPS56664 A JP S56664A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- battery
- output voltage
- availability time
- vbl
- 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 display hours for which a battery can be used still, by constituting a unit so that the detected battery voltage may be converted to an availability time on a basis of current consumption of a measuring circuit and so on given previously and this availability time may be digital-displayed.
CONSTITUTION: When battery check signal BC is applied, selector switch SW2 is connected to the (b) contact side. Here, the level of output voltage E0 in differential amplifier AMP is proportional to battery voltage VB. Consequently, if circuit conditions are so selected that output voltage E0 of AMP may be zero in case of VB= VBL where the lower limit value of the operating voltage is VBL, output voltage E0 indicates the availability time of battery BAT. Output voltage E0 of AMP is compared with reference voltage ES, by comparator COMP; and when output voltage E0 is smaller than reference voltage ES this voltage is a through selector switches SW1 and SW2 and is supplied to display circuit DIS and is displayed as the availability time of battery BAT.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7527179A JPS56664A (en) | 1979-06-15 | 1979-06-15 | Battery display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7527179A JPS56664A (en) | 1979-06-15 | 1979-06-15 | Battery display unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56664A true JPS56664A (en) | 1981-01-07 |
Family
ID=13571392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7527179A Pending JPS56664A (en) | 1979-06-15 | 1979-06-15 | Battery display unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56664A (en) |
-
1979
- 1979-06-15 JP JP7527179A patent/JPS56664A/en active Pending
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