[특허]Maximum power regulated battery charger

Maximum power regulated battery charger 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02J-007/00
출원번호	US-0701657 (1991-05-16)
발명자 / 주소	Dehnel Kris P. (Cypress TX)
출원인 / 주소	Compaq Computer Corporation (Houston TX 02)
인용정보	피인용 횟수 : 55 인용 특허 : 0

초록 ▼

An AC adapter that allows a lower power rating while still providing the necessary power to a load which is substantially constant over a varying voltage range and to charge a discharged Ni-Cad battery in a desired time. The AC adapter regulates its output power to a maximum level just greater than the maximum of the load rather than providing a controlled current until a predetermined fully charged voltage is attained. In this manner, the output voltage and current are allowed to vary inversely with respect to each other in order to maintain the desired power level, allowing the output current level to be reduced as the voltage level increases. A regulated voltage mode is also provided to keep the output voltage from rising above a predetermined maximum level should the Ni-Cad battery be disconnected. One preferred embodiment includes a regulated current mode wherein the current through the Ni-Cad battery is maintained at the desired trickle level once the battery is fully charged.

대표청구항 ▼

An AC adapter having an output for providing DC power to a substantially constant power load which can be selectively enabled or disabled, having a maximum load value and being substantially constant above a lower voltage level and to charge a battery, where the load and the battery are each electrically coupled to the output, and the battery is removably connected to the circuit and has a fully charged voltage level, comprising: power regulated source means having an output power control input, an output power sense output and a voltage output having a positive terminal and a negative terminal, wherein the positive terminal of the battery and the load are connected to said positive terminal of said voltage output, the negative terminal of the load is connected to said negative terminal of said voltage output, and the negative terminal of the battery is coupled to said negative terminal of said voltage output, wherein said voltage output provides the AC adapter output, for providing up to a predetermined maximum power level to the substantially constant load and the battery, said power regulated source means predetermined maximum power level exceeding the maximum load provided by the substantially constant load, such that the battery absorbs the remaining power supplied by said power regulated source means and said predetermined maximum power level being less than the battery fully charged voltage level times the current drawn by the substantially constant power load at the lower voltage level; and means having a sense input and a control output, said control output connected to said output power control input and said sense input connected to said output power sense output, for controlling the voltage output of said power regulated source means, said control means including means for limiting the output power provided by said power regulated source means to said predetermined maximum power level when the battery is in a condition for rapid charging and the total load presented to said power regulated source means by the battery and the substantially constant power load would otherwise cause the power output by said power regulated source means to exceed said predetermined maximum power level.

이 특허를 인용한 특허 (55)

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