JPS646574U

JPS646574U -

Info

Publication number: JPS646574U
Application number: JP10048987U
Authority: JP
Priority date: 1987-06-30
Filing date: 1987-06-30
Publication date: 1989-01-13

Description

[Brief explanation of the drawing]

図面は本考案の一実施例の構成を示すブロツク
図である。１……２次電池、２……抵抗、３……Ａ／Ｄコ
ンバータ、４……マイクロコンピユータ。 The drawing is a block diagram showing the configuration of an embodiment of the present invention. 1... Secondary battery, 2... Resistor, 3... A/D converter, 4... Microcomputer.

Claims

[Claims for Utility Model Registration] (1) A resistor connected in series with the secondary battery, an analog/digital converter that outputs the value of current flowing through the resistor as a digital signal, and an analog/digital converter that outputs the value of the current flowing through the resistor as a digital signal, Determine the discharge current and its duration, calculate the amount of discharged charge from that value, accumulate it, subtract it from the initial amount of charge of the secondary battery to determine the amount of remaining charge, and calculate the amount of remaining charge and the amount of initial charge. A remaining capacity detection circuit for a secondary battery, comprising a microcomputer that outputs a comparison result. (2) The microcomputer calculates the initial charge amount of the secondary battery from the sum of the cumulative value of the charge amount obtained from the charging current of the secondary battery and its duration, and the remaining charge amount before the start of charging. A remaining capacity detection circuit for a secondary battery according to claim 1 of the utility model registration claim. (3) The remaining capacity detection circuit according to claim 1 or 2, wherein the comparison result between the remaining charge amount and the initial charge amount is expressed as a ratio of the remaining charge amount to the initial charge amount. .