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Low-voltage and flow-backward-preventing rectifying circuit

A rectifier circuit and anti-backflow technology, applied in circuit devices, battery circuit devices, charging stations, etc., can solve the problems of decreased power efficiency, high rectification power consumption, and no reliable safety measures for charging, and achieve the effect of convenient use.

Pending Publication Date: 2017-12-08
镇江金日电子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, electric vehicles and electric bicycles have been widely popularized, but there are no reliable safety measures for charging. When not charging, the charging port is still directly connected to the battery pack, which has potential safety hazards. Once the charging port is short-circuited, it will cause a great safety accident. , ranging from burning the vehicle to causing personal safety accidents
In order to solve this technical problem in the prior art, various rectification circuits are widely used, but due to the existence of the diode’s own characteristics, there is a voltage drop in the forward conduction. When the load current is large, the rectification power consumption will be high, and the power supply efficiency will be greatly reduced

Method used

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  • Low-voltage and flow-backward-preventing rectifying circuit

Examples

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Embodiment 1

[0029] This embodiment is a low-voltage drop anti-backflow rectification circuit, such as figure 1 and figure 2 As shown, it includes auxiliary power supply circuit, whether there is input charger voltage and charging voltage polarity discrimination circuit and electronic switch circuit; auxiliary power supply circuit includes resistor R1, resistor R5, Zener diode D1; whether there is input charger voltage and charging voltage The polarity discrimination circuit includes operational amplifier U1, MOS transistor Q1, resistor R2, resistor R3, diode D2 and diode D3; the electronic switch circuit includes MOS transistor Q1 and integrated operational amplifier U1;

[0030] One end of the resistor R1 is connected to the positive pole of the battery pack and the charging input, and the other end is connected to the positive pole Vcc of the power supply of the operational amplifier U1 and the negative pole of the Zener diode D1, while the negative pole Vss of the power supply of the ...

Embodiment 2

[0040] This embodiment is a low-voltage drop anti-backflow rectification circuit, such as figure 1 and image 3 As shown, it includes auxiliary power supply circuit, input charger voltage and charging voltage polarity discrimination circuit and electronic switch circuit; auxiliary power supply circuit includes resistor R1, resistor R2, resistor R3, diode D2 and diode D3; electronic switch circuit includes MOS Tube Q1 and operational amplifier U1; the presence or absence of the input charger voltage and the voltage polarity discrimination circuit include operational amplifier U1, MOS tube Q1, resistor R2, resistor R3, diode D2 and diode D3;

[0041] One end of the resistor R1 is connected to the positive pole of the battery pack and charging input, the other end is connected to the positive pole Vcc of the power supply of the operational amplifier U1, and the negative pole Vss of the power supply of the operational amplifier U1 is directly connected to the negative pole of the ...

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PUM

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Abstract

The invention discloses a low-voltage and flow-backward-preventing rectifying circuit. The low-voltage and flow-backward-preventing rectifying circuit comprises an auxiliary power supply circuit, a circuit for judging whether a charger voltage is input or not and judging the polarity of the charging voltage, and an electronic switch circuit; the auxiliary power supply circuit comprises resistor R1, a resistor R5 and a voltage-stabilizing diode D1; the circuit for judging whether the charger voltage is input or not and judging the polarity of the charging voltage comprises an operational amplifier U1, an MOS transistor Q1, a resistor R2, a resistor R3, a diode D2 and a diode D3; and the electronic switch circuit comprises the MOS transistor Q1 and the operational amplifier U1. By virtue of the low-voltage and flow-backward-preventing rectifying circuit, the potential safety hazard of an electric bicycle and automotive charging input port can be solved successfully.

Description

technical field [0001] The invention relates to an anti-backflow circuit, in particular to a low-voltage drop anti-backflow rectification circuit for electric vehicles and electric bicycles. Background technique [0002] At present, electric vehicles and electric bicycles have been popularized in large numbers, but there are no reliable safety measures for charging. When not charging, the charging port is still directly connected to the battery pack, which has potential safety hazards. Once the charging port is short-circuited, it will cause a great safety accident. , ranging from burning the vehicle to causing personal safety accidents. In order to solve this technical problem in the prior art, various rectification circuits are widely used, but due to the existence of the diode’s own characteristics, there is a voltage drop in the forward conduction. When the load current is large, the rectification power consumption will be high, and the power supply Efficiency will be g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H02J7/06H02M7/217B60L11/18
CPCH02J7/027H02J7/06H02M7/217B60L53/22B60L2200/24B60L2200/12Y02T10/72Y02T10/70Y02T10/7072Y02T90/14
Inventor 虞兴保
Owner 镇江金日电子科技有限公司