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Cell reversal-connection protection circuit

A reverse polarity protection circuit and battery technology, applied to battery circuit devices, emergency protection circuit devices, circuit devices, etc., can solve the problems of complex circuits and low reliability of reverse polarity protection, and achieve low power consumption, simple and reliable configuration sex high effect

Inactive Publication Date: 2014-06-04
OCEANKING DONGGUAN LIGHTING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a battery reverse connection protection circuit, which aims to solve the problem of low reliability and complex circuit of reverse connection protection existing in the prior art using fuses or relays

Method used

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  • Cell reversal-connection protection circuit

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Embodiment Construction

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0017] figure 1 A structural schematic diagram of the battery reverse connection protection circuit provided by the embodiment of the present invention is shown.

[0018] The battery reverse polarity protection circuit in this figure includes a triode Q1, a field effect transistor Q2, a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, one end of the first resistor R1 is connect...

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Abstract

The invention discloses a cell reversal-connection protection circuit. The cell reversal-connection protection circuit includes a triode, a filed effect transistor, a first diode, a second diode, a first resistor, a second resistor, a third resistor and a forth resistor. In the cell reversal-connection protection circuit, the connection poles of a cell are judged directly through a pole judgment circuit connected in parallel at cell ends and then switch-on and switch-off of the field effect transistor is driven and thus a reversal-connection protection function is realized. The cell reversal-connection protection circuit is simple and rapid to form, small in number of used elements, low in power consumption and high in reliability.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a battery reverse connection protection circuit. Background technique [0002] The charging problem of rechargeable batteries has always been the focus of people's concern. Correct and good charging methods can ensure the battery life. If the positive and negative poles of the rechargeable battery are reversely connected to the charging device by mistake, a large current loop will be formed by the charger and the battery, resulting in the occurrence of polarized components such as integrated circuits, diodes, and electrolytic capacitors inside the charging device. Damage, or certain damage to the shape of the battery, may even bring greater safety hazards to the charging site. Therefore, it is necessary to strictly prevent wrong polarity connection, or to adopt a protection circuit to prevent battery reverse polarity. The usual approach is as follows: [0003] 1. The output ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18H02H11/00H02J7/00
Inventor 周明杰刘金财
Owner OCEANKING DONGGUAN LIGHTING TECH
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