[특허]Battery charge monitor and fuel gauge

Battery charge monitor and fuel gauge 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02J-007/04
출원번호	US-0825638 (1992-01-24)
발명자 / 주소	Hess Randall L. (Cypress TX) Cooper Patrick R. (Houston TX) Interiano Armando (Houston TX) Freiman Joseph F. (Cypress TX)
출원인 / 주소	Compaq Computer Corp. (Houston TX 02)
인용정보	피인용 횟수 : 75 인용 특허 : 0

초록 ▼

A battery charge controller and fuel gauge which accurately monitors the voltage, temperature, and charge and discharge current of a rechargeable battery, and calculates the battery\s charge capacity and charge level. Each time the battery is fully discharged, any calculated charge level remaining is divided by two and subtracted from the previously calculated charge capacity. When the battery is fully charged, the charge level is set equal to the charge capacity. During subsequent charge and discharge, the current is converted to a coulomb count and added or subtracted from the charge level to maintain an accurate charge level. Fast charge inefficiency due to temperature is considered by subtracting a temperature proportional factor before the charge level of the battery is updated. The charge level, voltage and temperature are used to determine the optimal fast charge termination point to achieve full charge and prevent temperature abuse and overcharge. A fast charge is applied only if the battery is within proper voltage and temperature ranges. The charge controller includes a microcontroller circuit within the same battery pack as the battery, which is powered by the battery when AC power is unavailable. The microcontroller circuit consumes very little power, measures circuit errors to assure data accuracy, times periods of self-discharge and updates the charge level accordingly. The microcontroller circuit also includes memory to store the battery charge information and a communication port to provide the charge information to a computer system connected to the battery pack.

대표청구항 ▼

An apparatus for determining an incremental battery charge value comprising: a battery; means for providing charging current to said battery; means for measuring the charging current being provided to said battery at a predetermined interval; means for measuring the temperature of said battery; and means coupled to said means for measuring charging current and said means for measuring battery temperature for developing an incremental charge value of said battery during said predetermined interval, said incremental charge value being based on the measured current value times said predetermined interval less a fraction of said measured temperature.

이 특허를 인용한 특허 (75)

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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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메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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연합인증

Battery charge monitor and fuel gauge 원문보기

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Battery charge monitor and fuel gauge 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (75)

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