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Alternative looping recharger

A charging device and circuit technology, which is applied in the direction of circuit devices, battery circuit devices, current collectors, etc., can solve the problems of inability to effectively reduce the size of the package, expensive, complex control circuits, etc.

Inactive Publication Date: 2007-01-17
GAOYIDA SCI & TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The known battery charging device consumes a lot of electronic components, which makes it impossible to effectively reduce the size of the package. At the same time, the used controller 170 has relatively many output / input pins, which makes the control circuit more complicated. It is also expensive

Method used

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Embodiment Construction

[0039] Please refer to image 3 , is a schematic circuit diagram of the present invention. The alternating circuit charging device of the present invention includes: a controller 270 capable of providing a first reference voltage 221 and a second reference voltage 232; a voltage error amplifier 220, connected to the battery 40 and the controller 270, is to detect Measure a battery voltage signal 223 and the first reference voltage 221, and compare the battery voltage signal 223 with the first reference voltage 221 to output a voltage error signal 222; a current error amplifier 230 is connected to the The battery 40 and the controller 270 obtain a battery current signal 231 and the second reference voltage 232, and compare the battery current signal 231 with the second reference voltage 232 to output a current error signal 233; A signal selector 280, connected to the voltage error amplifier 220 and the current error amplifier 230, receives the voltage error signal 222 and the ...

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Abstract

A alternative loop charging equipment, including: the controller that provides the first reference voltage and the second reference voltage; a voltage error amplifier connects with the battery and the controller that can get the battery voltage signal and the first reference voltage, compares and computes to output the voltage error signal; the current error amplifier connects with the battery and the controller that can get the battery voltage signal and the second reference voltage, compares and computes to output the current error signal; the signal selector connects with the voltage amplifier and the current amplifier that receives the voltage error signal and the current error signal to select one of them as the feedback signal; the transducer connects with the power supply and the battery, transforms the power supply into the fit charging power source according to the feedback signal outputting from the signal selector.

Description

technical field [0001] The invention relates to an alternate loop charging device, in particular to a charging device which alternately charges a battery by using a constant voltage mode and a constant current mode. Background technique [0002] It is generally known that the charging of a lithium battery needs to go through a pre-charging stage (precharge), a constant current charging stage (normal charge), and a constant voltage charging stage (top-off), and finally the charging is completed and the charging is automatically terminated. Please refer to figure 1 , is a schematic diagram of the known charging stages of the battery. When the battery has been deeply discharged, the battery charging should first enter the pre-charging stage. In the pre-charging stage, the power supply part provides a small constant current IP to charge the battery until the battery voltage reaches a normal voltage value Vn. After the pre-charging stage, it enters the constant current charging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/10
Inventor 何国斌
Owner GAOYIDA SCI & TECH SHENZHEN
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