[특허]Bidirectional current control circuit suitable for controlling the charging and discharging of rechargeable battery cel

[미국특허] Bidirectional current control circuit suitable for controlling the charging and discharging of rechargeable battery cel 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02J-007/00
출원번호	US-0904138 (1997-07-31)
발명자 / 주소	Smith Gregory J. Shacter Stuart Martinez Steve
출원인 / 주소	National Semiconductor Corporation
대리인 / 주소	Limbach & Limbach L.L.P.
인용정보	피인용 횟수 : 17 인용 특허 : 9

초록 ▼

A bidirectional current control circuit suitable for use in controlling the charging and discharging of rechargeable battery cells includes two serially connected metal oxide semiconductor field effect transistors (MOSFETs) with respective body diodes, a resistor which is connected in series with the MOSFETs and develops a voltage based upon the current through such MOSFETs, and a control circuit. The control circuit monitors the voltage across the resistor and selectively switches the MOSFETs on or off individually. As long as the current through the MOSFETs is less than a maximum positive current and more than a minimum negative current, both MOSFETs are maintained in their respective on states. When the negative current becomes less than a minimum negative current, the first MOSFET is turned off while the second MOSFET is turned on, and when the positive current becomes greater than a maximum positive current, the second MOSFET is turned off while the first MOSFET is turned on. In both situations, when the current conducted by the MOSFET which is turned on and the body diode of the MOSFET which is turned off reverses direction and rises above a minimum current while remaining below the corresponding maximum current, a return to a safe operating condition is thereby indicated and both MOSFETs are turned on. In an alternative embodiment, the control circuit monitors the voltage across the MOSFETs themselves to determine whether and when to switch the individual MOSFETs on or off.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus including a bidirectional current control circuit suitable for use in controlling the charging and discharging of rechargeable battery cells, comprising:a current control circuit withan on state which provides a bidirectional current conductivity,a first partially off state which provides a first unidirectional current conductivity in a first direction, anda second partially off state which provides a second unidirectional current conductivity in a second direction which is opposite to said first direction;a current detection circuit, coupled to said current control circuit, configured to detect a magnitude and a direction of a current being conducted through said current control circuit; anda switch controller, coupled to said current control circuit and said current detection circuit, configured tomaintain said current control circuit in said on state when said current magnitude is less than first and second maximum currents,switch said current control circuit from said on state to said first partially off state when said current direction is in said second direction and said current magnitude is greater than said second maximum current,switch said current control circuit from said first partially off state to said on state when said current direction changes from said second direction to said first direction and said current magnitude is greater than a first minimum current,switch said current control circuit from said on state to said second partially off state when said current direction is in said first direction and said current magnitude is greater than said first maximum current, andswitch said current control circuit from said second partially off state to said on state when said current direction changes from said first direction to said second direction and said current magnitude is greater than a second minimum current.

이 특허에 인용된 특허 (9) 인용/피인용 타임라인 분석

Eguchi Yasuhito (Kanagawa JPX) Murano Kanji (Tokyo JPX) Sanpei Akira (Fukushima JPX) Tamiya Hajime (Tokyo JPX), Battery charge control circuit.
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Eguchi Yasuhito (Kanagawa JPX) Okada Hitoshi (Chiba JPX) Murano Kanji (Tokyo JPX) Sanpei Akira (Fukushima JPX), Battery protection circuit.
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Sudo Minoru,JPX ; Takashina Takayuki,JPX ; Kojima Yoshikazu,JPX ; Shimoda Sadashi,JPX ; Mukainakano Hiroshi,JPX, Charge/discharge control circuit and chargeable electric power source apparatus.
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Tamai Mikitaka,JPX, Charging circuit.
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Eguchi Yasuhito (Kanagawa JPX) Sato Masayuki (Tokyo JPX) Narushima Toshio (Kanagawa JPX) Sanpei Akira (Fukushima JPX) Murano Kanji (Tokyo JPX), Circuit for preventing overcharge and overdischarge of secondary batteries.
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Smith Gregory J. (Tucson AZ) Kunst David J. (Tucson AZ), Integrated resistor for sensing electrical parameters.
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Smith Gregory J. (Tucson AZ), Methods and apparatus for protecting battery cells from overcharge.
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Nagai Tamiji,JPX ; Ozawa Kazunori,JPX, Secondary battery pack.
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Higashijima Yasuhisa (Atsugi JPX) Takeuchi Masaru (Atsugi JPX), Secondary cell protection unit for protecting a secondary cell from overdischarge or overcharge without excessive power.
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이 특허를 인용한 특허 (17) 인용/피인용 타임라인 분석

Kobayashi, Tetsuya; Itou, Masaya, Apparatus for discharging a combination battery consisting of a plurality of secondary batteries.
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Wiesner, Bernd; Beck, Tobias, Arrangement for measuring a single cell in a rechargeable battery pack and rechargeable battery pack comprising such an arrangement.
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Wozniak, John A., Battery pack with protection circuit.
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De Cremoux,Guillaume; Van Loo,Insun; Dikken,Jan; Nieuwhoff,Ferry; Christoforou,Yovgos; Kenc,Aykut; Willemsen,Wilhelmus Johannes Remigius, Bi-directional double NMOS switch.
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Mukainakano Hiroshi,JPX, Charge and discharge control circuit with function detecting charge and discharge current and chargeable power supply unit.
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Ryoo,Tae Ha; Jang,Byung Tak; Ryoo,Ji yeoul, Circuit and method for eliminating pop noise in digital audio amplifier using dual power supply.
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Michael Hanson, Connecting lug used as a current-sense resistor.
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Nguyen, Don J.; Solivan, Thovane, Current limiting super capacitor charger.
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Potanin,Vladislav; Potanina,Elena; Vijeh,Khosrow; Dye,Richard, Dual-source CMOS battery charger.
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Jaoui, Younes; Morin, Christophe, Electric energy storage system comprising an inverter.
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Ferguson, Bruce, Four quadrant MOSFET based switch.
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Stellberger,Achim, Integrated circuit implementing protection switch for battery charging and discharging with enhanced reverse voltage protection.
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Girard, Gregory J.; Karditsas, Nick; Collier, John, Intelligent charging and discharging system for parallel configuration of series cells with semiconductor switching.
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Ronald, Timothy R., Lithium-ion over voltage protection circuit.
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Girard, Gregory J.; Karditsas, Nick; Collier, John, Parallel configuration of series cells with semiconductor switching.
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George E. Sage ; Jay A. Fuhr, Passively protected battery pack with on load charge and on load conditioning-discharge capability and charging system.
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Check, Kenneth A., Solid state safety relay.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Bidirectional current control circuit suitable for controlling the charging and discharging of rechargeable battery cel 원문보기