Cell system, control method thereof and charger for cell system

A battery system and control method technology, applied in battery circuit devices, current collectors, instruments, etc., can solve problems such as power loss and achieve the effect of reducing power loss

Inactive Publication Date: 2010-03-24
RICHTEK TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In U.S. Patent No. 6,957,292, a detection method is proposed, which utilizes a USB transmit receiver for detection, however, in this method, the USB transmit receiver will always

Method used

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  • Cell system, control method thereof and charger for cell system
  • Cell system, control method thereof and charger for cell system
  • Cell system, control method thereof and charger for cell system

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[0037] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0038] see now figure 1 , figure 1 It is a schematic diagram of the lithium-ion battery system of the present invention. As shown in the figure, the lithium-ion battery system 10 includes a power input terminal 12 for connecting to an external voltage source, the charger 14 for controlling the charging of the battery BAT, and a baseband chipset for transmitting and receiving digital Signal. The charger 14 includes a switch CH_SW connected between the VIN pin of the power input terminal 12 and the battery BAT. The charging controller 1402 controls the current through the switch CH_SW according to the signal S1, thereby controlling the charging of the battery BAT. The switch RL_SW is connected to the power supply. Between the D+ pin of the input terminal and the USB detector 1404, the USB detector 1404 detects the level on the D+ pin to generate signals S1 a...

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Abstract

The invention relates to a charger for a cell system, the cell system comprises an input end which is used for connecting with an external voltage source, a USB transmission receiver which exchanges data with an external circuit through a first pin and a second pin in the input end and an internal voltage source, the charger comprises a detector and a controller, and the charger is characterized in that the detector is used for detecting at least one quasi-position in the first pin and the second pin for judging whether the external voltage source is a USB voltage source or not; and the controller starts the internal voltage source for providing a power supply for the USB transmission receiver when the detector judges that the external voltage source is the USB voltage source.

Description

technical field [0001] The present invention relates to a battery system, in particular to a battery system, a control method thereof and a charger for the battery system. Background technique [0002] In addition to being charged by an alternating current (AC) voltage source, the lithium-ion battery system of an existing portable electronic device can also be charged by a USB slot on a computer. At present, most of the portable electronic devices have only one power input port, and the power input port can be connected to AC voltage source and USB voltage source, so the battery system must detect the type of input power source, if the input power source is AC voltage source , it can only charge the battery, if the input power is a USB voltage source, it can not only charge the battery but also transmit data. [0003] A detection method is proposed in US Pat. No. 6,957,292, which utilizes a USB transmitter receiver for detection. However, in this method, the USB transmitter...

Claims

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Application Information

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IPC IPC(8): H02J7/00G06F13/38G06F3/00
Inventor 龚能辉陈俊聪
Owner RICHTEK TECH
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