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A battery charging anti-reverse circuit

A battery charging and anti-reverse technology, which is applied to battery circuit devices, circuit devices, emergency protection circuit devices, etc., can solve the problems of prolonged charging time, poor anti-reverse stability, battery damage, etc., and achieve good anti-reverse stability and process Simple, low energy loss effect

Inactive Publication Date: 2015-09-02
NINGBO AMBON EMERGENCY PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are two main types of existing battery charging anti-reverse circuits: the first anti-reverse circuit is composed of a diode. Because the diode itself can generate a voltage above 0.3V, it will generate a large voltage when charging the battery with a large current. Energy loss, resulting in serious heating of the anti-reverse diode, and longer charging time; the second anti-reverse circuit is composed of two field effect transistors connected back to back. When the anti-reverse circuit is used for battery anti-reverse, if the charging input terminal is reversed Or short circuit, the anti-reverse circuit cannot detect the input voltage or charging current, so the battery will directly enter the charging process and be damaged. Therefore, the anti-reverse circuit needs to be used with a single-chip circuit with a control program. The single-chip circuit first charges The voltage or charging current at the input terminal is detected whether it is normal or not, and then a corresponding control signal is generated and sent to the anti-reverse circuit. The reverse circuit needs to be used in conjunction with the single-chip circuit and software program, the anti-reverse processing process is more complicated, and the anti-reverse stability is poor

Method used

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  • A battery charging anti-reverse circuit
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Embodiment 1

[0011] Embodiment 1: As shown in the figure, a battery charging anti-reverse circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first field effect transistor T1, The second field effect transistor T2, the third field effect transistor T3, the fourth field effect transistor T4, the diode D1 and the fuse FUSE1, one end of the first resistor R1 is connected to one end of the fuse FUSE1 and its connection end is the positive charging input end, the second The other end of the first resistor R1, one end of the second resistor R2 are connected to the source of the first field effect transistor T1, the other end of the second resistor R2, the gate of the first field effect transistor T1 and the source of the third field effect transistor T3 The drain is connected and its connection terminal is the negative charge input terminal, the drain of the first field effect transistor T1, the gate of the third field effe...

Embodiment 2

[0013] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that the first capacitor C1 is connected in parallel at both ends of the second resistor, and the second capacitor C2 is connected in parallel at both ends of the third resistor R3. In this embodiment, the first capacitor C1 and the second capacitor C2 are added, the first capacitor C1 and the second capacitor C2 filter out the high-frequency interference signal in the anti-reverse circuit, and improve the anti-interference ability of the anti-reverse circuit, the circuit of this embodiment Compared with Embodiment 1, the circuit stability is stronger.

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Abstract

The invention discloses a reverse charging preventing circuit of battery charging. One end of a first resistor in the circuit is connected with one end of a fuse, the other end of the first resistor, one end of a second resistor and a source electrode of a first field effect tube are connected, the other end of the second resistor, a grid electrode of the first field effect tube and a drain electrode of a third field effect tube are connected, a drain electrode of the first field effect tube, a grid electrode of the third field effect tube, one end of a third resistor, a drain electrode of the second field effect tube and a grid electrode of a fourth field effect tube are connected, a source electrode of the third field effect tube, the other end of the third resistor, a source electrode of the second field effect tube, one end of a fourth resistor and a source electrode of the fourth field effect tube are connected, a grid electrode of the second field effect tube, the other end of the fourth resistor and one end of a fifth resistor are connected, and the other end of the fifth resistor is connected with a negative pole of a diode. The circuit has the advantages of being small in energy loss, simple in an inverse charging preventing processing process and good in inversion charging prevention stability.

Description

technical field [0001] The invention relates to a charging anti-reverse circuit, in particular to a battery charging anti-reverse circuit. Background technique [0002] There are two main types of existing battery charging anti-reverse circuits: the first anti-reverse circuit is composed of a diode. Because the diode itself can generate a voltage above 0.3V, it will generate a large voltage when charging the battery with a large current. Energy loss, resulting in serious heating of the anti-reverse diode, and longer charging time; the second anti-reverse circuit is composed of two field effect transistors connected back to back. When the anti-reverse circuit is used for battery anti-reverse, if the charging input terminal is reversed Or short circuit, the anti-reverse circuit cannot detect the input voltage or charging current, so the battery will directly enter the charging process and be damaged. Therefore, the anti-reverse circuit needs to be used with a single-chip circu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02H7/18
Inventor 何建芬徐乃军
Owner NINGBO AMBON EMERGENCY PROD