IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0259312
(1999-03-01)
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발명자
/ 주소 |
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출원인 / 주소 |
- Ma Lien Electrical Engineering Co., Ltd., TWX
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
4 |
초록
▼
A charging circuit includes a programable CPU for supplying a constant voltage and a constant current respectively to a voltage control circuit and a current control circuit so as to obtain function of automatically adjust the charging voltage and fix the current. A voltage checking circuit is provi
A charging circuit includes a programable CPU for supplying a constant voltage and a constant current respectively to a voltage control circuit and a current control circuit so as to obtain function of automatically adjust the charging voltage and fix the current. A voltage checking circuit is provided to coordinate with the CPU for keeping watch of charging operation and checking if a battery being charged is normal or not. If the stored electric volume is less than a quarter (indicating the battery is damaged), if the positive and the negative of the charging circuit are connected reversely with those of the battery, if pinchers of the charging circuit contact each other in a short-circuited condition, or if the pinchers fall off the poles of the battery, the CPU stops at once charging operation so as to protect the charging circuit and batteries.
대표청구항
▼
[ What is claimed is:] [1.] A charging circuit comprising a power circuit, a drive circuit, a PWM circuit, a voltage control circuit, a current control circuit, a central control circuit and a voltage checking circuit;said power circuit rectifying power and filtering wave and stabilizing voltage to
[ What is claimed is:] [1.] A charging circuit comprising a power circuit, a drive circuit, a PWM circuit, a voltage control circuit, a current control circuit, a central control circuit and a voltage checking circuit;said power circuit rectifying power and filtering wave and stabilizing voltage to be supplied to the other circuits;said drive circuit consisting of transformer having a charging negative formed at a center point of its coil, two ouputs of said transformer respectively connected to A pins of two silicon-controlled rectifiers, K pins of said two rectifiers connected with each other and then connected with a shunt to act as a charging positive, trigger pins of said two silicon-controlled rectifiers connected to the emitter of a transistor Q3, the collector of said transistor Q3 connected with said power circuit, the base of said transistor Q3 connected to the output of said PWM circuit;said PWM circuit consisting of an amplifier U2A for amplifying output signal of said voltage control circuit and feeding it to a comparator U2B as a DC level, a standard triangle wave fed to another input of said comparator U2B, the output of said comparator U2B connected to the base of said transistor Q3;characterized by said voltage control circuit having an OP amplifier U2D for fading the voltage at the input charging negative and then feeding it to a comparator U2C for comparing it with that at its pin, said compared value fed to the input of said amplifier U2A of said PWM circuit for adjusting and stabilizing the output voltge of said charging circuit;said current control circuit having an OP amplifier U3C as a differential amplifier for amplifying the current of said shunt of said drive circuit, said amplified circuit faded by two resistors R11, r13 and then fed to a comparator U3D, the output of said comparator U3D connected to the output of another comparator U2C via a diode D3, said OP amplifier U3B amplifying the current of said shunt and feeding it to said comparator U3D for comparison with the constant current, said comparator U3D having a high output, the negative of said diode D3 having a higher voltage than the positive in case of the normal output current not exceeding the constant current, thus the voltage of said comparator U2C fed to said amplifier U2A being not affected, the output of said comparator U3D being low potential and the positive voltage of said diode D3 being higher than that of the negative to make said diode ON in case of said current exceeding the constant current, thus the voltage of said comparator U2C fed to said amplifier U2A becoming lower to alter the output charging voltage and thus obtaining function of fixing a constant current;said central control circuit having a CPU for controlling charging operation in coordination with an inner program, dividing the charging operation into two stages of a first equalizing charge and a second floating charge, the output port of said CPU supplying the constant voltage to said comparator U2C of said voltage control circuit and the constant current to said comparator U3D of said current control circuit; andsaid voltage checking circuit having an OP amplifier U3B as a phase invert amplifier, inverting phase and amplifying the voltage of the input charging negative, said phase inverting amplifier of said OP amplifier U3B having its output being low potential and said CPU stopping at once charging operation so as to protect said charging circuit and a battery being charged in case of any irregularity occurring in charging operation, said OP amplifier U3B having its output being high potential and said CPU keeping on normal and no irregularity.
이 특허에 인용된 특허 (4)
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Hinohara Makoto (Tokyo JPX), Battery charger which detects the battery charging status.
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Sasaki Masayoshi (Miyagi JPX) Umetsu Koji (Miyagi JPX) Sameshima Tsugio (Chiba JPX), Multi-rate constant voltage battery charger with display.
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Hinohara Makoto,JPX, Power-supply apparatus and its mounting-completion indication method.
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Lee Chang-Hum,KRX, Rechargeable battery charging circuit.
이 특허를 인용한 특허 (5)
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Wang, Han-Che; Zhao, Xin; Ouyang, Hong-Sheng; Li, Xiao-Guang; Chung, Shin-Hong, Battery charging circuit with trickle charging mode.
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Yagi Kazuhiko,JPX ; Sato Noboru,JPX ; Ishikura Takashi,JPX, Battery charging device.
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David Small ; Brian Farley ; James McKeefery, Methods and apparatuses for rechargeable battery pack chargers.
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Jolivet, Paul; Deprun, Jean-Francois, Performing contactless applications in battery off mode.
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Small David ; Farley Brian D. ; McKeefery W. James, Rechargeable battery pack charging system with redundant safety systems.
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