JPS5995270U

JPS5995270U - Battery voltage detection circuit

Info

Publication number: JPS5995270U
Application number: JP1983152602U
Authority: JP
Inventors: 大野　義隆
Original assignee: 三菱電機株式会社
Priority date: 1978-02-16
Filing date: 1983-09-29
Publication date: 1984-06-28
Also published as: JPS54109882A

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の回路例を示す回路図、第２区はバッテリ
電圧の時間変化を示す説明図、第３図はこの考案によ−
る一実施例を示す回路図、第４図はこの考案の他の実施
例を示す回路図である。図中、Ｂはバッテリ、ＶＢはバッテリ電圧、ＶＩ、ｌは
バッテリ電圧の上限値、■、はバッテリ電圧の下限値、
ＲＬはリレーコイル、Ｒ８は既のブレイク接点、Ｃは充
電回路、Ａはリレーを含む増重部、２、、２２はゼナー
ダイオード、Ｄはダイオード、ＲＡ、　Ｒ３，Ｒ１は抵
抗、Ｓはシュミット回路、Ｔｒｌ。Ｔｒ２．Ｔｒ３はトランジスタ、ＲＶ、、　ＲＶ２は可
変抵抗または固定抵抗、Ｒ８１，ＲＢ２．ＲＥは抵抗、
Ｃ８はコンデンサである。Figure 1 is a circuit diagram showing an example of a conventional circuit, Section 2 is an explanatory diagram showing changes in battery voltage over time, and Figure 3 is a circuit diagram based on this invention.
FIG. 4 is a circuit diagram showing another embodiment of this invention. In the figure, B is the battery, VB is the battery voltage, VI, l is the upper limit of the battery voltage, ■ is the lower limit of the battery voltage,
RL is the relay coil, R8 is the existing break contact, C is the charging circuit, A is the multiplication part including the relay, 2, 22 are Zener diodes, D is the diode, RA, R3, R1 are resistors, S is Schmitt circuit, Trl. Tr2. Tr3 is a transistor, RV2 is a variable resistor or fixed resistor, R81, RB2 . RE is resistance;
C8 is a capacitor.

Claims

[Scope of utility model registration request]

(1) In a circuit that detects the upper and lower limits of the voltage of a rechargeable battery and generates a command to turn on or shut off the battery charging circuit, a hysteresis characteristic corresponding to the upper and lower limits of the battery voltage is applied. a transistor-type Schmitt circuit, a first Zener diode that converts the battery voltage into a constant voltage and supplies it between the collector and emitter of the input stage transistor of the Schmitt circuit; and a first Zener diode that divides the battery voltage and supplies the voltage to the input stage transistor. The first zener diode is connected to each resistor supplied between the collector φ base and between the emitter and base, and the cathode is inserted in series with the voltage dividing resistor with the collector output between the collector and base of the input stage transistor. A battery voltage detection circuit comprising: a second zener diode having a voltage temperature coefficient with a polarity different from that of the voltage temperature coefficient.

(2) Utility Model Registration Scope of Claims In the item described in claim 1, a conventional Schmitt circuit in which an emitter follower circuit is inserted between the collector output of the input stage transistor and the base input of the output stage transistor is used as a Schmitt circuit. The voltage detection circuit used in the batch.