KR950004680A - Built-in battery overheat protection and voltage regulation circuit - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for miniaturizing battery overheat protection and voltage regulation circuitry, wherein such overheat protection and regulation circuitry is formed in integrated circuits 200 and 600 and embedded in a casing of individual batteries. According to one feature of the invention, MOSFET switch Q1, temperature sensing diode D1 and control circuit 604 may be formed in integrated circuit 600 and embedded in a casing of a battery. The MOSFET switch can be placed in the charge path of the battery to provide an open circuit when the battery temperature exceeds a predetermined level. In accordance with another feature of the invention, the operation of the MOSFET switch Q1 is controlled by the control circuit 204 to provide a constant output voltage from the battery, thereby improving the operation of the portable system using a battery.

Description

Built-in battery overheat protection and voltage regulation circuit

Since this is an open matter, no full text was included.

FIG. 2 is a schematic electrical circuit diagram of a preferred embodiment of a voltage regulating circuit that can be embedded in a battery according to the technique of the present invention, FIG. 3 is a schematic electrical circuit diagram of the control circuit shown in FIG. A chart showing the attenuation of the unregulated battery cell output voltage for FIG. 5 is a chart showing the battery cell output voltage over time according to the technique of the present invention, and FIG. 6 is embedded in a battery according to the technique of the present invention. A schematic electrical circuit diagram of a preferred embodiment of a thermal protection circuit that can be, FIG. 7 is a schematic electrical circuit diagram of the control circuit shown in FIG.

Claims (18)

An electronic circuit embedded in a power source for use in a portable system, comprising: an electronic switch operable to control the level of power flowing between the power source and the system, the electronic switch being operable to control the operation of the electronic switch and the one or more physical And a control circuit responsive to the detection of the parameter. 2. The electronic circuit of claim 1 wherein the electronic switch and control circuit are on a single integrated circuit chip. 2. The electronic circuit of claim 1 wherein the control switch comprises a MOSFET transistor. 2. The electronic circuit of claim 1 wherein the control circuit comprises a P-N junction diode. The electronic circuit of claim 1 wherein the one or more physical parameters comprise a temperature of a predetermined level. The electronic circuit of claim 1 wherein the one or more physical parameters comprise a voltage of a predetermined level. The electronic circuit of claim 1 wherein the power source comprises a rechargeable battery. The electronic circuit of claim 1 wherein the power source comprises a battery that is not rechargeable. The electronic circuit of claim 1 wherein the portable system comprises a portable communication system. A method of controlling the output of a power source of a portable system, comprising: embedding electronic circuitry in the power source, detecting one or more physical parameters of the power source with the embedded electronic circuitry, and in response to the detecting step; Controlling the level of power flowing between the power source and the system with the embedded electronic circuitry. The method of claim 10, wherein detecting the one or more physical parameters comprises detecting one or more predetermined temperature levels. The method of claim 10, wherein detecting the one or more physical parameters comprises detecting one or more predetermined temperature levels. 11. The method of claim 10, wherein said controlling step comprises controlling the current level flowing through the MOSFET transistor. An electronic circuit embedded in a power source for use in a portable system, comprising: a power cell, a transistor coupled to a conduction path between a terminal of the cell and a terminal of the power source, detection operable to detect one or more physical parameters of the power source And a control circuit operable to control conduction of the circuit and the transistor, the control circuit responsive to detection by the detection circuit. 15. The electronic circuit of claim 14 wherein the detection circuit comprises a P-N junction diode. 15. The electronic circuit of claim 14 wherein the control circuit comprises a low voltage drop-out regulator circuit. 15. The electronic circuit of claim 14 wherein the detection circuit comprises a low voltage drop out regulation circuit. 15. The electronic circuit of claim 14 wherein the portable system comprises a portable communication system. ※ Note: The disclosure is based on the initial application.