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A power switching circuit

A power supply switching and voltage circuit technology, applied in the field of circuits, can solve problems such as high cost, achieve low design and manufacturing costs and maintenance and repair costs, and reduce design and production costs and post-maintenance costs.

Active Publication Date: 2021-01-05
湖南康通电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a power supply switching circuit, which is used to overcome defects such as high cost in the prior art, realize low-voltage protection of the battery and seamless switching function of power supply, and save design cost at the same time

Method used

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  • A power switching circuit

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Embodiment 1

[0015] The invention provides a power supply switching circuit.

[0016] Please refer to figure 1 , a power supply switching circuit, comprising: a power switching part 1, a power protection part 2, and a charging part 3, wherein:

[0017] The power switching part 1 includes a rectifier 11 connected to the commercial power and a first field effect transistor 12, which is used to control the on-off of the drain of the first field effect transistor through the first voltage circuit 13 connected to the gate of the first field effect transistor. The power supply switching between the rectifier and the rechargeable battery; the rectifier 11 is used to convert the alternating current of the connected commercial power into direct current to supply power to the load;

[0018] Wherein the first voltage control circuit 13 is mainly formed by connecting components such as resistors and capacitors, wherein when there is mains power, the output voltage of the rectifier 11 is normal, the f...

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Abstract

The invention discloses a supply switching circuit, composed of a power switching portion, a power protecting portion and a charging portion. The circuit is capable of realizing continuous power supply to external equipment to cause the external power demand equipment to be not restarted or to abnormally work, and capable of detecting the battery voltage in real time to carry out protection duringa low voltage of the battery and improve the service life of the battery. While such type of integrated circuit adopted by battery management in the market has a cost about three times higher than that of the invention, the supply switching circuit provided by the invention greatly reduces the production cost.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to a power supply switching circuit. Background technique [0002] In recent years, batteries have been widely used in handheld terminals, smart home terminals, emergency system terminals and other fields. Generally speaking, the battery management system consists of the following parts: charging circuit, power switching circuit, battery protection circuit; some systems also include a battery power acquisition circuit. [0003] In current battery management applications, most expensive integrated circuit ICs are used to implement power management. However, in some products with strict cost requirements, the high price of integrated circuit ICs obviously cannot meet the expected demand. Contents of the invention [0004] The invention provides a power supply switching circuit, which is used to overcome defects such as high cost in the prior art, realize battery low-voltage protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/06H02J7/00
CPCH02J7/0031H02J9/061H02J7/00306
Inventor 李浩谢春晖刘雅浪蔡兆云
Owner 湖南康通电子股份有限公司
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