CN204103480U - A kind of charger reversal connection and short-circuit protection circuit - Google Patents

A kind of charger reversal connection and short-circuit protection circuit Download PDF

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Publication number
CN204103480U
CN204103480U CN201320892998.1U CN201320892998U CN204103480U CN 204103480 U CN204103480 U CN 204103480U CN 201320892998 U CN201320892998 U CN 201320892998U CN 204103480 U CN204103480 U CN 204103480U
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CN
China
Prior art keywords
charger
resistance
circuit
short
reversal connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320892998.1U
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Chinese (zh)
Inventor
徐成宪
陈海龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGZHOU KINGPAN INDUSTRIAL Co Ltd
Original Assignee
GUANGZHOU KINGPAN INDUSTRIAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUANGZHOU KINGPAN INDUSTRIAL Co Ltd filed Critical GUANGZHOU KINGPAN INDUSTRIAL Co Ltd
Priority to CN201320892998.1U priority Critical patent/CN204103480U/en
Application granted granted Critical
Publication of CN204103480U publication Critical patent/CN204103480U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides the reversal connection of a kind of Switching Power Supply charger and short-circuit protection circuit, protection when there is the phenomenon of reversal connection or short circuit when charging process for charger.This circuit adds switching device at the output of rechargable battery device, is reached the object of protection by the break-make of reversal connection and short block control switch device.This circuit structure is simple, is easy to realize, and has good defencive function to charger.Greatly reduce the harm of charger when there is the problem in reversal connection, short circuit.

Description

A kind of charger reversal connection and short-circuit protection circuit
Technical field
The utility model relates to battery charger field, particularly a kind of charger protection circuit.
Background technology
At present, the use of Switching Power Supply charger is more and more extensive.People progressively increase for the demand of charger.But due to some artificial and unartificial factors, battery charger failure also gets more and more.Therefore, a good charger, its safeguard measure is also an important index.At present, though most of charger has safeguard procedures, circuit is comparatively complicated, and charger cost is increased.
And this circuit structure is simple, comprise element few.While protection charger, can reduce costs again.
Utility model content
The purpose of this utility model is by providing a kind of structure simple, with low cost, the charger reversal connection that protected effect is outstanding and short-circuit protection circuit, realizes protection when reversal connection or short-circuit conditions appear in charger.
The technical scheme of this novel practical is as follows: a kind of charger reversal connection and short-circuit protection circuit, is characterized in that: comprise resistance R1, R2, R3, R4, transistor, switch element, charger and battery;
Described resistance R4 is connected with charger output with switch element one end in parallel, and the other end is connected with battery;
The collector electrode of described transistor is connected with switch element, for turning on and off of control switch element;
Described resistance R1 and resistance R2 connects afterwards and cell parallel;
The base stage of described transistor is connected with resistance R3, and the resistance R3 other end is connected with resistance R1 and resistance R2 simultaneously;
One end of one end of described charger, the emitter of transistor, resistance R2 one end and battery connects and ground connection.
Accompanying drawing explanation
Accompanying drawing 1 is circuit theory diagrams of the present utility model;
Embodiment
Below in conjunction with Fig. 1, utility model works principle is described further:
As shown in Figure 1, a kind of charger reversal connection and short-circuit protection circuit: comprise resistance R11, R22, R33, R44, transistor 5, switch element 6, charger 7 and battery 8; Resistance R44 is connected with charger 7 output with switch element 6 one end in parallel, and the other end is connected with battery 8; The collector electrode of transistor 5 is connected with switch element 6, for turning on and off of control switch element 6; Resistance R11 and resistance R22 is in parallel with battery 8 after connecting; The base stage of transistor 5 is connected with resistance R33, and the resistance R33 other end is connected with resistance R11 and resistance R22 simultaneously; One end of one end of charger 7, the emitter of transistor 5, resistance R22 one end and battery 8 connects and ground connection.
When charger 7, battery 8 connect normal, resistance R11 and resistance R22 is connected to battery two ends, has the effect of dividing potential drop.Resistance R22 the voltage that divides be input to the base stage of transistor 5 through resistance R33.If now charger works on power, then the collector and emitter of transistor 5 can form path, causes switching elements conductive, and charging starts.
If output short-circuit, then transistor 5 base voltage is 0V, triode not conducting, thus switch element 6 is disconnected.Now, resistance R44 seals in charger 7 output, the effect of electric current when can reach restriction short circuit by changing resistance R44 resistance.Because resistance R44 is in parallel with switch element 6, when normally working, resistance R44 resistance is shorted, and can not produce power consumption.During output no-load, do not have current circuit, resistance R44 can not produce unnecessary power consumption equally.
If output reversal connection, then transistor 5 base voltage is negative value, and now the collector electrode of transistor 5 and emitter can not conductings, and switch element disconnects.Resistance R44 plays the effect of Limited Current equally.Select the resistance of suitable resistance, can current limit very little, now just can protect charger and battery simultaneously.
Above-described the utility model execution mode, does not form the restriction to the utility model protection range.Any do within spirit of the present utility model and principle amendment, equivalent to replace and improvement etc., all should be included within claims of the present utility model.

Claims (1)

1. charger reversal connection and a short-circuit protection circuit, is characterized in that: comprise resistance R1 (1), R2 (2), R3 (3), R4 (4), transistor (5), switch element (6), charger (7) and battery (8);
Described resistance R4 (4) is connected with charger (7) output with switch element (6) one end in parallel, and the other end is connected with battery (8);
The collector electrode of described transistor (5) is connected with switch element (6), for turning on and off of control switch element (6);
In parallel with battery (8) after described resistance R1 (1) and resistance R2 (2) series connection;
The base stage of described transistor (5) is connected with resistance R3 (3), and resistance R3 (3) other end is connected with resistance R1 (1) and resistance R2 (2) simultaneously;
One end of one end of described charger (7), the emitter of transistor (5), resistance R2 (2) one end and battery (8) connects and ground connection.
CN201320892998.1U 2013-12-31 2013-12-31 A kind of charger reversal connection and short-circuit protection circuit Expired - Fee Related CN204103480U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320892998.1U CN204103480U (en) 2013-12-31 2013-12-31 A kind of charger reversal connection and short-circuit protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320892998.1U CN204103480U (en) 2013-12-31 2013-12-31 A kind of charger reversal connection and short-circuit protection circuit

Publications (1)

Publication Number Publication Date
CN204103480U true CN204103480U (en) 2015-01-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320892998.1U Expired - Fee Related CN204103480U (en) 2013-12-31 2013-12-31 A kind of charger reversal connection and short-circuit protection circuit

Country Status (1)

Country Link
CN (1) CN204103480U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107979146A (en) * 2017-11-06 2018-05-01 珠海格力智能装备有限公司 Charge protector, method and bionical equipment
CN109659925A (en) * 2017-10-11 2019-04-19 致茂电子(苏州)有限公司 Power supply device with wiring protection

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109659925A (en) * 2017-10-11 2019-04-19 致茂电子(苏州)有限公司 Power supply device with wiring protection
CN109659925B (en) * 2017-10-11 2019-12-10 致茂电子(苏州)有限公司 Power supply device with wiring protection
CN107979146A (en) * 2017-11-06 2018-05-01 珠海格力智能装备有限公司 Charge protector, method and bionical equipment

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150114

Termination date: 20151231

EXPY Termination of patent right or utility model