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A DC output anti-backfeed protection circuit

A protection circuit, DC output technology, applied in safety/protection circuits, emergency protection circuit devices, circuit devices, etc., can solve problems such as poor reliability, achieve high control reliability, protect charging modules, and avoid back-feeding effects.

Active Publication Date: 2020-12-04
XJ POWER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a DC output anti-backfeed protection circuit, which is used to solve the problem of poor reliability of the battery charging current backfeed control by using a relay switch

Method used

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  • A DC output anti-backfeed protection circuit

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The structural diagram of the DC output anti-backfeed protection circuit of the present invention is as follows: figure 1 As shown, it includes a power switch module, a driver IC module and a peripheral voltage divider circuit, a circuit input port VO1 for connecting a DC charging module, and a circuit output port VO for connecting a battery. The circuit input port VO1 is used for connecting a DC charging module. The circuit output port VO is used to connect the battery to be charged. Wherein, the power switch module is arranged in series between the circuit input port VO1 and the circuit output port VO, and the driving IC module samples and connects the circuit input port VO1 and the circuit output port VO, and controls the connect...

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Abstract

The invention relates to a direct-current output anti-backflow protection circuit comprising a driving IC module, a circuit input port for connecting a direct-current charging module, and a circuit output port for connecting a battery. A power switch module is connected in series between the circuit input port and the circuit output port. The driving IC module is connected with the circuit input port and the circuit output port in a sampling manner and is in control connection with the power switch module. According to the invention, the power switch module is connected in series between the direct-current charging module and the battery, the driving IC module collects the output voltage of the direct-current charging module and the battery voltage; and the connection or disconnection of the power switch module is controlled by comparison of the two voltages. All devices have the fast reaction speeds; the control reliability is high; the anti-backflow phenomenon of the battery voltageis avoided; and the charging module is protected effectively.

Description

technical field [0001] The invention relates to a DC output anti-backfeed protection circuit, which belongs to the technical field of power electronics. Background technique [0002] When the charger module charges the battery, the battery is the charging object and also the load of the power supply. When the charging power supply stops outputting, the battery will supply power to the output side of the charger module, that is, there will be backflow. If the charger module does not have an anti-backfeed protection circuit, the battery power will not only be wasted, but also the excessive back-feed voltage may cause damage to the charger module. Therefore, it is very necessary to provide an anti-backfeed protection circuit on the DC output side of the charger module. [0003] The Chinese patent document with the notification number CN203278367U discloses a high-power battery charging device that prevents battery reverse connection, and uses a relay switch to cooperate with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02H11/00
CPCH02H11/00H02J7/0029H02J7/0034H02J7/0036
Inventor 董钦邓长吉曹亚曹智慧李杰朱子庚黄栋杰胡永华杨明陈松伟董鹤
Owner XJ POWER CO LTD
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