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Selector circuit for power management in multiple battery systems

A technology for selectors and power supply systems, applied to battery circuit devices, arrangements of multiple synchronous batteries, charge equalization circuits, etc., can solve problems such as inability to receive control signals, inability to independently determine corrections and notifications, etc.

Active Publication Date: 2005-02-09
O2 MICRO INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, these selector circuits often cannot independently determine, correct, and notify other components in the power supply module of a power crisis condition
Additionally, these selector circuits cannot receive control signals from the associated primary power management unit (PMU)

Method used

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  • Selector circuit for power management in multiple battery systems
  • Selector circuit for power management in multiple battery systems
  • Selector circuit for power management in multiple battery systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] figure 1 Shown is a simplified block diagram of an electronic device 100 that can be powered by any number of power sources 104,105. These power sources include batteries 105 and a DC power source 104 . The battery 105 can be various types of rechargeable batteries, such as lithium-ion, nickel-cadmium, nickel-hydrogen batteries, and so on. The electronic device 100 can be any device known in the art powered by the power source 104 or 105, such as a portable electronic device (notebook computer, cell phone, pager, personal digital assistant, camcorder, digital camera, cassette player, etc.) etc.), electric vehicles, power tools, etc.

[0019] If the electronic device 100 is a notebook computer, it will include various components (not described in figure 1 shown in ). For example, a notebook computer may include an input device for inputting data into the notebook computer, a central processing unit (CPU) or processor (such as Intel's Pentium processor) for executing ...

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PUM

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Abstract

A selector circuit configured to select among a DC power source and a plurality of batteries for an electronic device. The selector circuit is responsive to an output signal from an associated power management unit. The selector circuit is further configured to permit parallel operation of two or more of the batteries. The selector circuit may further act to independently verify power conditions and override instructions from the PMU in certain instances to enhance power supply safety and battery life such as by preventing inter battery current flow from a higher potential battery to a lower potential battery coupled in parallel. A power supply block including the selector circuit and an electronic device including the power supply block is also provided. The selector circuit may be integrated with a charging circuit on one integrated circuit.

Description

technical field [0001] The present invention relates to selector circuits, and more particularly to selector circuits for multi-battery systems. Background technique [0002] Selector circuits are generally applied to power supply modules of various electronic devices. These selector circuits are typically used to select between a DC power source (such as an AC / DC adapter) and a rechargeable battery. In addition, in various electronic devices, such as notebook computers, these selector circuits are usually controlled by control signals transmitted by a system management bus (SMBus) according to a specific protocol. Additionally, these selector circuits typically cannot independently determine, correct, and notify other components in the power supply module of a power crisis condition. Additionally, these selector circuits cannot receive control signals from the associated primary power management unit (PMU). [0003] Therefore, there is a need in the art for a selector ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/34
CPCH02J2007/0059H02J2007/0067H02J7/34H02J7/0027H02M2001/0045H02J7/0068H02J7/0057H02J7/0018H02J2207/20H02J7/0069H02J7/0025H02M1/0045
Inventor 康斯坦丁·布克法拉·坡贝斯库-斯塔内斯缇玛利安·尼古拉
Owner O2 MICRO INT LTD