Power supply circuit, power supply device, and control method

A power supply and circuit technology, which is applied in the direction of battery circuit devices, circuit devices, control/regulation systems, etc., can solve the problems of short circuit life, unsafety, explosive pulp, etc., to improve service life and safety, and to use flexibly and safe, volume-reducing effects

Active Publication Date: 2021-01-19
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]Liquid electrolytic capacitors have defects such as short lifespan and explosiv

Method used

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  • Power supply circuit, power supply device, and control method
  • Power supply circuit, power supply device, and control method
  • Power supply circuit, power supply device, and control method

Examples

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Example Embodiment

[0019] The primary side of the power supply circuit in the related art is provided with both a primary rectifying unit and a primary filtering unit. The primary filter unit generally contains one or more liquid electrolytic capacitors. Liquid electrolytic capacitors have the characteristics of large capacitance and strong filtering ability. The presence of the liquid electrolytic capacitor enables the output of the power supply circuit to be a constant direct current. However, the liquid electrolytic capacitor has the characteristics of short life and explosive slurry, which leads to short service life and unsafety of the power supply circuit. In addition, using a constant direct current to charge the battery in the device to be charged will cause polarization and lithium deposition of the battery, which may reduce the service life of the battery.

[0020] In order to improve the service life and safety of the power supply circuit, and alleviate the polarization and lithium ...

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Abstract

Provided are a power supply circuit (10), a power supply device and a control method. The power supply circuit (10) includes a primary rectification unit (11), a modulation unit (12), a transformer (13), a secondary rectification filter unit (14), a current feedback unit (15) and a control unit (16). The power supply circuit (10) removes the liquid electrolytic capacitor on the primary side, so that the volume of the power supply circuit is smaller and the use is safer. In addition, the control unit (16) can determine the voltage type of the input alternating current, and set the current limiting value in the current feedback unit (15) according to the voltage type of the alternating current, so that the use of the power supply circuit (10) is more flexible .

Description

technical field [0001] The present application relates to the field of charging, and more specifically, relates to a power supply circuit, a power supply device and a control method. Background technique [0002] A power supply circuit usually includes a primary conversion unit and a secondary conversion unit. The primary converting unit generally includes a primary rectifying unit and a primary filtering unit. The primary filter unit usually needs to use one or more large-capacity liquid electrolytic capacitors (such as liquid aluminum electrolytic capacitors) to perform primary filtering on the primary rectified voltage. [0003] Liquid electrolytic capacitors have defects such as short lifespan and explosive pulp, which lead to short lifespan and unsafety of traditional power supply circuits. Contents of the invention [0004] The present application provides a power supply circuit, a power supply device and a control method, which can improve the service life and saf...

Claims

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Application Information

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IPC IPC(8): H02M7/02H02M3/335H02M1/32
CPCH02J7/02H02J2207/20H02M1/10H02M3/33507G05F1/10H02M3/33592H02M7/12H02H9/00H02M7/1557H02M7/00H02M3/33576H02M3/33546
Inventor 田晨张加亮
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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