CN104426173A - Charging circuit - Google Patents

Charging circuit Download PDF

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Publication number
CN104426173A
CN104426173A CN201310375574.2A CN201310375574A CN104426173A CN 104426173 A CN104426173 A CN 104426173A CN 201310375574 A CN201310375574 A CN 201310375574A CN 104426173 A CN104426173 A CN 104426173A
Authority
CN
China
Prior art keywords
described
charging circuit
silicon controlled
voltage
connects
Prior art date
Application number
CN201310375574.2A
Other languages
Chinese (zh)
Inventor
周明杰
杨超慧
Original Assignee
深圳市海洋王照明工程有限公司
海洋王照明科技股份有限公司
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 深圳市海洋王照明工程有限公司, 海洋王照明科技股份有限公司 filed Critical 深圳市海洋王照明工程有限公司
Priority to CN201310375574.2A priority Critical patent/CN104426173A/en
Publication of CN104426173A publication Critical patent/CN104426173A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04Regulation of charging current or voltage

Abstract

Disclosed in the embodiment of the invention is a charging circuit comprising a protection circuit and a rechargeable battery. The protection circuit consists of a triode, a first silicon controlled rectifier, a second silicon controlled rectifier, a first capacitor, a first resistor and a first voltage-regulator tube. An emitting electrode of the triode is connected with a positive output terminal of a power supply, a cathode of the first voltage-regulator tube and a positive electrode of the rechargeable battery; a collector of the triode is connected with an anode of the first silicon controlled rectifier and one end of the first capacitor; and a base electrode of the triode is respectively connected with a control electrode of the first silicon controlled rectifier, an anode of the first voltage-regulator tube, and one end of the first resistor. A cathode of the first silicon controlled rectifier is connected with a negative output terminal of the power supply; a cathode of the second silicon controlled rectifier is connected with the cathode of the first silicon controlled rectifier; an anode of the second silicon controlled rectifier is connected with a negative electrode of the rechargeable battery and the other end of the first resistor; and a control electrode of the second silicon controlled rectifier is connected with the other end of the first capacitor. When the power voltage is higher than the rate charging voltage of the rechargeable battery, the charging circuit can be disconnected automatically, so that the rechargeable battery is protected.

Description

A kind of charging circuit

Technical field

The present invention relates to electronic applications, particularly relate to a kind of charging circuit.

Background technology

Rechargeable battery, can repeatedly discharge and recharge also known as secondary cell, recycles.For primary cell, secondary cell has long service life, and the scope of application is wide, abundant raw materials and the features such as renewable use, has been widely used in the every field such as communication, electric power at present, has also become indispensable product in people's daily life.Secondary cell is relatively stricter to the requirement of charging voltage when charging, if charging voltage is too high, not only can brings the damage of unrepairable to secondary cell, even may set off an explosion, there is potential safety hazard.

Summary of the invention

Technical problem to be solved by this invention is, provides a kind of charging circuit, when charging voltage is too high, automatically can disconnect charging circuit, protection rechargeable battery.

In order to solve the problems of the technologies described above; the charging circuit that embodiments of the invention provide; comprise protective circuit and rechargeable battery, described protective circuit comprises: triode, the first controllable silicon, the second controllable silicon, the first electric capacity, the first resistance and the first voltage-stabiliser tube, wherein:

The emitter of described triode connects the cathode output end of power supply, the negative electrode of described first voltage-stabiliser tube and the positive pole of described rechargeable battery respectively, the collector electrode of described triode connects one end of described first silicon controlled anode and the first electric capacity respectively, and the base stage of described triode connects described first silicon controlled respectively and controls pole, the anode of described first voltage-stabiliser tube and one end of described first resistance;

Described first silicon controlled negative electrode connects the cathode output end of described power supply;

Described second silicon controlled negative electrode connects described first silicon controlled negative electrode, and described second silicon controlled anode connects the negative pole of described rechargeable battery and the other end of described first resistance, and described second silicon controlled controls the other end that pole connects described first electric capacity.

As a kind of feasible execution mode, described protective circuit also comprises the second resistance, and described second resistance is connected on the base stage of described triode and described first silicon controlled controls between pole.

As a kind of feasible execution mode, described protective circuit also comprises diode, and the anode of described diode connects one end of described second resistance, and the negative electrode of described diode connects described first silicon controlled and controls pole.

As a kind of feasible execution mode, described charging circuit also comprises light-emitting diode, and the anode of described light-emitting diode connects the negative pole of described rechargeable battery, and the negative electrode of described light-emitting diode connects described second silicon controlled anode.

As a kind of feasible execution mode, described charging circuit also comprises Transformer Rectifier circuit, and described Transformer Rectifier circuit comprises transformer and rectifier bridge, wherein:

Two inputs of the primary coil of described transformer are connected across between civil power input line, and two outputs of the secondary coil of described transformer connect two ac input ends of described rectifier bridge respectively;

The positive DC of described rectifier bridge exports the cathode output end of power supply described in termination, and the negative DC of described rectifier bridge exports the cathode output end of power supply described in termination.

As a kind of feasible execution mode, described charging circuit also comprises filter circuit, and described filter circuit comprises the second electric capacity, between the cathode output end that described second electric capacity is connected on described power supply and cathode output end.

As a kind of feasible execution mode, described charging circuit also comprises voltage stabilizing circuit, described voltage stabilizing circuit comprises the second voltage-stabiliser tube, and the negative electrode of described second voltage-stabiliser tube connects the cathode output end of described power supply, and the anode of described second voltage-stabiliser tube connects the cathode output end of described power supply.

As a kind of feasible execution mode, described triode is PNP type triode, and described first controllable silicon and described second controllable silicon are single-phase silicon-controlled.

As a kind of feasible execution mode, described rechargeable battery is secondary cell.

As a kind of feasible execution mode, described transformer is single-phase transformer, and described rectifier bridge is fullwave rectification bridge.

Embodiment of the present invention tool has the following advantages or beneficial effect:

Charging circuit of the present invention comprises voltage conversion circuit, protective circuit, cue circuit and rechargeable battery, and wherein protective circuit comprises triode, the first controllable silicon, the second controllable silicon, the first electric capacity, the first resistance and the first voltage-stabiliser tube.When charging voltage is too high; first voltage-stabiliser tube conducting; first electric resistance partial pressure makes the base stage of triode and the first silicon controlled control pole and is in high potential; triode ends; first controlled silicon conducting, makes the first capacitor discharge simultaneously, thus the second controllable silicon is blocked; charging circuit disconnects, and plays the effect of protection rechargeable battery.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the electrical block diagram of an embodiment of charging circuit of the present invention;

Fig. 2 is the electrical block diagram of another embodiment of charging circuit of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Referring to Fig. 1, is the electrical block diagram of an embodiment of charging circuit of the present invention.As shown in Figure 1, charging circuit of the present invention comprises protective circuit and rechargeable battery BT, protective circuit comprises: triode Q1, first controllable silicon SCR 1, second controllable silicon SCR 2, first electric capacity C1, first resistance R1 and the first voltage-stabiliser tube ZD1, wherein: the emitter of triode Q1 connects the cathode output end of power supply respectively, the negative electrode of the first voltage-stabiliser tube ZD1 and the positive pole of rechargeable battery BT, the collector electrode of triode Q1 connects the anode of the first controllable silicon SCR 1 and one end of the first electric capacity C1 respectively, the base stage of triode Q1 connects the control pole of the first controllable silicon SCR 1 respectively, the anode of the first voltage-stabiliser tube ZD1 and one end of the first resistance R1, the negative electrode of the first controllable silicon SCR 1 connects the cathode output end of power supply, the negative electrode of the second controllable silicon SCR 2 connects the first silicon controlled negative electrode, and the anode of the second controllable silicon SCR 2 connects the negative pole of rechargeable battery BT and the other end of the first resistance R1, and the control pole of the second controllable silicon SCR 2 connects the other end of the first electric capacity C1.

As a kind of feasible execution mode, triode Q1 of the present invention is PNP type triode, and the first controllable silicon SCR 1 and the second controllable silicon SCR 2 are single-phase silicon-controlled, and power supply is DC power supply.This power supply can be battery, also can be the direct current that civil power obtains after Transformer Rectifier filtering.

As a kind of feasible execution mode, rechargeable battery BT of the present invention is secondary cell, can repeatedly discharge and recharge.

As a kind of feasible execution mode, transformer T1 of the present invention is single-phase transformer, and described rectifier bridge DB1 is fullwave rectification bridge.

Please consulting Fig. 2 further, is the electrical block diagram of another embodiment of charging circuit of the present invention.As shown in Figure 2, in the execution mode that some are feasible, charging circuit of the present invention on the basis of the circuit of Fig. 1, also can comprise in following circuit structure one or more.

1, protective circuit of the present invention also can comprise the second resistance R2, and the second resistance R2 is connected between the base stage of triode Q1 and the control pole of the first controllable silicon SCR 1.Second resistance R2 is used for dividing potential drop current limliting, is the protective resistance of the first controllable silicon SCR 1.

2, protective circuit of the present invention also can comprise diode D1, and the anode of diode D1 connects one end of the second resistance R2, and the negative electrode of diode D1 connects the control pole of the first controllable silicon SCR 1.

3, charging circuit of the present invention also comprises LED, and the anode of LED connects the negative pole of rechargeable battery BT, and the negative electrode of LED connects the anode of the second controllable silicon SCR 2.In the embodiment of the present invention, when the output voltage of power supply is normal, when can charge normal rechargeable battery BT, LED is lighted, and plays indicative function.

4, charging circuit of the present invention also can comprise Transformer Rectifier circuit, and this Transformer Rectifier circuit comprises transformer T1 and rectifier bridge DB1, wherein:

Two inputs of the primary coil of transformer T1 are connected across between civil power input line, and two outputs of the secondary coil of transformer T1 connect two ac input ends of rectifier bridge respectively, and transformer T1 is for reducing the voltage of mains electricity.

The positive DC of rectifier bridge DB1 exports the cathode output end of termination power, and the negative DC of rectifier bridge DB1 exports the cathode output end of termination power, and rectifier bridge DB1 is used for the mains electricity after step-down to become Rectified alternating current.

5, charging circuit of the present invention also can comprise filter circuit, and this filter circuit comprises the second electric capacity C2, and the second electric capacity C2 is connected between the cathode output end of power supply and cathode output end, for filtering to obtain more stable direct current.

6, charging circuit of the present invention also can comprise voltage stabilizing circuit, and this voltage stabilizing circuit comprises the second voltage-stabiliser tube ZD2, and the negative electrode of the second voltage-stabiliser tube ZD2 connects the cathode output end of power supply, and the anode of the second voltage-stabiliser tube ZD2 connects the cathode output end of power supply.Second voltage-stabiliser tube ZD2 is no more than its reverse breakdown voltage for the output voltage controlling power supply, shields to the components and parts of protective circuit.In concrete enforcement, the reverse breakdown voltage rated of the second voltage-stabiliser tube ZD2 should higher than the reverse breakdown voltage rated of the first voltage-stabiliser tube ZD1.

In specific implementation, the operation principle of the circuit of the embodiment of the present invention is roughly as follows:

When charging voltage higher than rechargeable battery of the output voltage of power supply; first voltage-stabiliser tube conducting; first electric resistance partial pressure makes the base stage of triode and the first silicon controlled control pole and is in high potential; triode ends; first controlled silicon conducting, makes the first capacitor discharge simultaneously, thus the second controllable silicon is blocked; charging circuit disconnects, and plays the effect of protection rechargeable battery.

Above-described execution mode, does not form the restriction to this technical scheme protection range.The amendment done within any spirit at above-mentioned execution mode and principle, equivalently to replace and improvement etc., within the protection range that all should be included in this technical scheme.

Claims (10)

1. a charging circuit, comprises protective circuit and rechargeable battery, it is characterized in that, described protective circuit comprises: triode, the first controllable silicon, the second controllable silicon, the first electric capacity, the first resistance and the first voltage-stabiliser tube, wherein:
The emitter of described triode connects the cathode output end of power supply, the negative electrode of described first voltage-stabiliser tube and the positive pole of described rechargeable battery respectively, the collector electrode of described triode connects one end of described first silicon controlled anode and the first electric capacity respectively, and the base stage of described triode connects described first silicon controlled respectively and controls pole, the anode of described first voltage-stabiliser tube and one end of described first resistance;
Described first silicon controlled negative electrode connects the cathode output end of described power supply;
Described second silicon controlled negative electrode connects described first silicon controlled negative electrode, and described second silicon controlled anode connects the negative pole of described rechargeable battery and the other end of described first resistance, and described second silicon controlled controls the other end that pole connects described first electric capacity.
2. charging circuit as claimed in claim 1, it is characterized in that, described protective circuit also comprises the second resistance, and described second resistance is connected on the base stage of described triode and described first silicon controlled controls between pole.
3. charging circuit as claimed in claim 2, it is characterized in that, described protective circuit also comprises diode, and the anode of described diode connects one end of described second resistance, and the negative electrode of described diode connects described first silicon controlled and controls pole.
4. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises light-emitting diode, and the anode of described light-emitting diode connects the negative pole of described rechargeable battery, and the negative electrode of described light-emitting diode connects described second silicon controlled anode.
5. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises Transformer Rectifier circuit, and described Transformer Rectifier circuit comprises transformer and rectifier bridge, wherein:
Two inputs of the primary coil of described transformer are connected across between civil power input line, and two outputs of the secondary coil of described transformer connect two ac input ends of described rectifier bridge respectively;
The positive DC of described rectifier bridge exports the cathode output end of power supply described in termination, and the negative DC of described rectifier bridge exports the cathode output end of power supply described in termination.
6. charging circuit as claimed in claim 5, it is characterized in that, described charging circuit also comprises filter circuit, and described filter circuit comprises the second electric capacity, between the cathode output end that described second electric capacity is connected on described power supply and cathode output end.
7. charging circuit as claimed in claim 6, it is characterized in that, described charging circuit also comprises voltage stabilizing circuit, described voltage stabilizing circuit comprises the second voltage-stabiliser tube, the negative electrode of described second voltage-stabiliser tube connects the cathode output end of described power supply, and the anode of described second voltage-stabiliser tube connects the cathode output end of described power supply.
8. the charging circuit as described in any one of claim 1-4, is characterized in that, described triode is PNP type triode, and described first controllable silicon and described second controllable silicon are single-phase silicon-controlled.
9. the charging circuit as described in any one of claim 1-4, is characterized in that, described rechargeable battery is secondary cell.
10. charging circuit as claimed in claim 5, it is characterized in that, described transformer is single-phase transformer, and described rectifier bridge is fullwave rectification bridge.
CN201310375574.2A 2013-08-26 2013-08-26 Charging circuit CN104426173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310375574.2A CN104426173A (en) 2013-08-26 2013-08-26 Charging circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310375574.2A CN104426173A (en) 2013-08-26 2013-08-26 Charging circuit

Publications (1)

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CN104426173A true CN104426173A (en) 2015-03-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105656154A (en) * 2016-04-01 2016-06-08 福建科立讯电子有限公司 Charging protection circuit, charging protection system, charging protection method, charger and interphone

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109665U (en) * 1991-11-26 1992-07-08 何永东 Automatic delay cut-off controller of power supply
US20020190693A1 (en) * 2000-10-20 2002-12-19 Katsunori Kitagawa Battery pack and its tester
CN101626199A (en) * 2008-07-08 2010-01-13 张海艇 Transformerless DC voltage-stabilized power supply

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109665U (en) * 1991-11-26 1992-07-08 何永东 Automatic delay cut-off controller of power supply
US20020190693A1 (en) * 2000-10-20 2002-12-19 Katsunori Kitagawa Battery pack and its tester
CN101626199A (en) * 2008-07-08 2010-01-13 张海艇 Transformerless DC voltage-stabilized power supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105656154A (en) * 2016-04-01 2016-06-08 福建科立讯电子有限公司 Charging protection circuit, charging protection system, charging protection method, charger and interphone

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Application publication date: 20150318

RJ01 Rejection of invention patent application after publication