JPS57173770A - Residual battery capacity measurement device - Google Patents

Residual battery capacity measurement device

Info

Publication number
JPS57173770A
JPS57173770A JP56060188A JP6018881A JPS57173770A JP S57173770 A JPS57173770 A JP S57173770A JP 56060188 A JP56060188 A JP 56060188A JP 6018881 A JP6018881 A JP 6018881A JP S57173770 A JPS57173770 A JP S57173770A
Authority
JP
Japan
Prior art keywords
voltage
battery
memory element
residual capacity
measurement device
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
Application number
JP56060188A
Other languages
Japanese (ja)
Inventor
Hiromasa Yamamoto
Tatsu Osagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56060188A priority Critical patent/JPS57173770A/en
Publication of JPS57173770A publication Critical patent/JPS57173770A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tests Of Electric Status Of Batteries (AREA)

Abstract

PURPOSE:To indicate the residual capacity of a battery without passing current through the battery by making the terminal voltage of the battery follow the element voltage of a voltage memory element and displaying the element battery as a residual capacity. CONSTITUTION:A battery 11 is discharged through a load 3 by means of a switch 12. The voltage between the terminals R-W of a voltage memory element 15 is amplified by an amplifier 16 and added to the input to a comparator 14. In the comparator 14 the battery voltage and the amplified voltage are compared and an element 15 is charged or discharged through a switch. Accordingly the element voltage of the voltage memory element follows the terminal voltage of the battery 11 with a proportional constant. Because an amplifier 18 is constituted, so that its output becomes zero at the voltage of the voltage memory element when, for example, the battery 11 reaches the voltage at which discharge stops, the drop in voltage at the time of battery discharge can be displayed in almost linear relationship as decrease in residual capacity by providing graduation of 0-100% on an indicator 19.
JP56060188A 1981-04-20 1981-04-20 Residual battery capacity measurement device Pending JPS57173770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56060188A JPS57173770A (en) 1981-04-20 1981-04-20 Residual battery capacity measurement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56060188A JPS57173770A (en) 1981-04-20 1981-04-20 Residual battery capacity measurement device

Publications (1)

Publication Number Publication Date
JPS57173770A true JPS57173770A (en) 1982-10-26

Family

ID=13134932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56060188A Pending JPS57173770A (en) 1981-04-20 1981-04-20 Residual battery capacity measurement device

Country Status (1)

Country Link
JP (1) JPS57173770A (en)

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