CN104600673A - Under-voltage protection circuit and lamp - Google Patents

Under-voltage protection circuit and lamp Download PDF

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Publication number
CN104600673A
CN104600673A CN201310529204.XA CN201310529204A CN104600673A CN 104600673 A CN104600673 A CN 104600673A CN 201310529204 A CN201310529204 A CN 201310529204A CN 104600673 A CN104600673 A CN 104600673A
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CN
China
Prior art keywords
input
under
output
switch
unit
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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.)
Pending
Application number
CN201310529204.XA
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Chinese (zh)
Inventor
周明杰
王现中
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.)
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Original Assignee
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering 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 Oceans King Lighting Science and Technology Co Ltd, Shenzhen Oceans King Lighting Engineering Co Ltd filed Critical Oceans King Lighting Science and Technology Co Ltd
Priority to CN201310529204.XA priority Critical patent/CN104600673A/en
Publication of CN104600673A publication Critical patent/CN104600673A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an under-voltage protection circuit and a lamp. The under-voltage protection circuit comprises a reset unit, a detection unit, a control unit and a switch unit, wherein the reset unit is connected with a battery; the detection unit is connected with the reset unit; the control unit is connected with the detection unit; the switch unit is connected with the control unit, the battery, the detection unit and a subordinate circuit; the reset unit is used for starting the under-voltage protection circuit to work; when the detection unit detects that the electric quantity of the battery is smaller than a set value, the control unit is used for controlling the switch unit to disconnect the battery and the subordinate circuit; when the circuit of the battery is restored to be normal, a user can newly start the under-voltage protection circuit through the reset unit to realize work; when the under-voltage protection circuit is in a working state, the user can only stop the under-voltage protection circuit through the reset unit. Under-voltage protection can be performed on the battery, the life of the battery is prolonged, a self-locking function is realized, and major accidents are prevented.

Description

Under-voltage protecting circuit and light fixture
Technical field
The present invention relates to protective circuit, particularly relate to under-voltage protecting circuit and light fixture.
Background technology
In prior art, when battery input voltage is too low, if do not carry out under-voltage protection in time, will battery over-discharge be caused, affect battery.In addition in specific occasion, some appliance requires maintenance operating state, if there is people to slip up device shutdown, just likely causes unnecessary economic loss, even cause the generation of serious accident.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency overcoming the existence of above-mentioned prior art; and a kind of under-voltage protecting circuit and light fixture are proposed; it can solve does not have under-voltage protection to cause battery over-discharge; affect battery, and because misoperation brings the problem such as economic loss and potential safety hazard.
For solving the problems of the technologies described above, the present invention proposes a kind of under-voltage protecting circuit, and it comprises: reset unit, it is for starting under-voltage protecting circuit, and keep under-voltage protecting circuit work or disconnect with subordinate circuit, it comprises input and output, and the input of reset unit connects battery; Detecting unit, whether it is for detecting the electricity of battery lower than set point, and it comprises first input end, the second input and output, and the first input end of detecting unit connects the output of reset unit; Control unit, it comprises input and output, and the input of control unit connects the output of detecting unit; Switch element, it is controlled by control unit, and it comprises control end, input and output, the output of the control end connection control unit of switch element, the input of switch element connects battery, and the output of switch element connects the second input and subordinate's circuit of detecting unit; Wherein, reset unit starts under-voltage protecting circuit work; when detecting unit detects the electricity of battery lower than set point; control unit controls switch unit the connection of battery and subordinate's circuit; when the electricity of battery recovers normal; user restarts under-voltage protecting circuit by reset unit and could work, and when under-voltage protecting circuit is in running order, user only has could stop under-voltage protecting circuit work by reset unit.
Preferably, reset unit comprises the first resistance and touch-switch, between the input that the first resistance and touch-switch are connected on reset unit successively and output.
Preferably, detecting unit comprises the second resistance and the 3rd resistance, one end of second resistance connects the second input of detecting unit, and ground connection after other end connection the 3rd resistance of the second resistance, the second resistance is all connected first input end and the output of detecting unit with the junction of the 3rd resistance.
Preferably, control unit comprises the first switching tube and the first electric capacity, first switching tube comprises control end, input and output, the input of the control end connection control unit of the first switching tube, the output of the input connection control unit of the first switching tube, the output head grounding of the first switch, between the base stage that the first electric capacity is connected to the first switching tube and emitter.
Preferably, the first switching tube is triode, and the base stage of triode is the control end of the first switching tube, the input of the current collection of triode very the first switching tube, the output of the transmitting of triode very the first switching tube.
Preferably, switch element comprises second switch pipe and the 4th resistance, second switch pipe comprises control end, input and output, the input of the input connecting valve unit of second switch pipe, the control end of the control end connecting valve pipe unit of second switch pipe, the output of the output connecting valve unit of second switch pipe, between the input that the 4th resistance is connected to second switch pipe and control end.
Preferably, second switch pipe is triode, and the base stage of triode is the control end of second switch pipe, the input of the transmitting of triode very second switch pipe, the output of the current collection of triode very second switch pipe.
Preferably, under-voltage protecting circuit also comprises indicating member, and whether it is under-voltage for showing under-voltage protecting circuit, the output of indicating member connecting valve unit.
Preferably, indicating member comprises indicator light and the 5th resistance, and indicator light and the 5th resistance are connected between the output of switch element and ground successively.
The present invention also proposes a kind of light fixture, and it comprises described under-voltage protecting circuit.
Compared with prior art; the present invention has following beneficial effect: under-voltage protecting circuit of the present invention and light fixture; can protect when battery undervoltage; extend the useful life of battery; and there is auto-lock function, prevent the generation causing economic loss and serious accident because of error closing device.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of under-voltage protecting circuit of the present invention.
Wherein, description of reference numerals is as follows: reset unit 1 first resistance R1 touch-switch S1 detecting unit 2 second resistance R2 the 3rd resistance R3 control unit 3 triode Q1 first electric capacity C1 switch element 4 triode Q2 the 4th resistance R4 indicating member 5 indicator light LED1 the 5th resistance R5.
Embodiment
In order to further illustrate principle of the present invention and structure, existing by reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail.
under-voltage protecting circuit embodiment
A kind of under-voltage protecting circuit, it comprises: reset unit 1, detecting unit 2, control unit 3, switch element 4 and indicating member 5.
Reset unit 1 comprises input and output, and detecting unit 2 comprises first input end, the second input and output, and control unit 3 comprises input and output, and switch element 4 comprises control end, input and output.The input of reset unit 1 connects battery, the first input end of detecting unit 2 connects the output of reset unit 1, the input of control unit 3 connects the output of detecting unit 2, the output of the control end connection control unit 3 of switch element 4, the input of switch element 4 connects battery, and the output of switch element 4 connects the second input of detecting unit 2, subordinate's circuit and indicating member 5.
Reset unit 1 is for starting under-voltage protecting circuit; and keep under-voltage protecting circuit work or disconnect with subordinate circuit; whether detecting unit 2 is for detecting the electricity of battery lower than set point; switch element 4 is controlled by control unit 3; when detecting unit 2 detects the electricity of battery lower than set point; it is under-voltage that indicating member 5 shows under-voltage protecting circuit, and control unit 3 control switch unit 4 disconnects the connection of battery and subordinate's circuit.When the electricity of battery recovers normally, user can restart under-voltage protecting circuit by reset unit 1 and could work.When described under-voltage protecting circuit is in running order, user only has could stop described under-voltage protecting circuit work by described reset unit, and indicating member 5 shows under-voltage protecting circuit and is in normal condition.
Reset unit 1 comprises the first resistance R1 and touch-switch S1.Between the input that first resistance R1 and touch-switch S1 is connected on reset unit 1 successively and output.
Detecting unit 2 comprises the second resistance R2 and the 3rd resistance R3.One end of second resistance R2 connects the second input of detecting unit 2, and ground connection after other end connection the 3rd resistance R3 of the second resistance R2, the second resistance R2 is all connected first input end and the output of detecting unit 2 with the junction of the 3rd resistance R3.
Control unit 3 comprises the first switching tube and the first electric capacity C1.First switching tube comprises control end, input and output, the input of the control end connection control unit 3 of the first switching tube, the output of the input connection control unit 3 of the first switching tube, the output head grounding of the first switch, between the base stage that the first electric capacity C1 is connected to the first switching tube and emitter.
In the present embodiment, the first switching tube is triode Q1, and the base stage of triode Q1 is the control end of the first switching tube, the input of the current collection of triode Q1 very the first switching tube, the output of the transmitting of triode Q1 very the first switching tube.In other embodiments, triode Q1 also can replace with metal-oxide-semiconductor.
Switch element 4 comprises second switch pipe and the 4th resistance R4.Second switch pipe comprises control end, input and output, the input of the input connecting valve unit 4 of second switch pipe, the control end of the control end connecting valve pipe unit of second switch pipe, the output of the output connecting valve unit 4 of second switch pipe, between the input that the 4th resistance R4 is connected to second switch pipe and control end.
In the present embodiment, second switch pipe is triode Q2, and the base stage of triode Q2 is the control end of second switch pipe, the input of the transmitting of triode Q2 very second switch pipe, the output of the current collection of triode Q2 very second switch pipe.In other embodiments, triode Q2 also can replace with metal-oxide-semiconductor.
Indicating member 5 comprises indicator light LED1 and the 5th resistance R5.Between the output that indicator light LED1 and the 5th resistance R5 is connected on switch element 4 successively and ground.When battery undervoltage time, indicator light LED1 stops luminescence, and when battery is normal, indicator light LED1 is luminous.
light fixture embodiment: the present invention also proposes a kind of light fixture, and it comprises under-voltage protecting circuit as above.
Operation principle of the present invention is described in detail below in conjunction with Fig. 1.
Under normal circumstances, press touch-switch S1, triode Q1 voltage obtains and electricly becomes high level, triode Q1 conducting, makes the base stage of triode Q2 be low level.Because triode Q2 is PNP type triode, so triode Q2 conducting, VCC is through triode Q2 to output end vo, and Vo is that high voltage exports.After second resistance R2, the 3rd resistance R3 dividing potential drop, the base stage of triode Q2 maintains high level, make triode Q1, triode Q2 constant conduction, so indicator light LED1 lights, output voltage Vo maintains high level always, now unclamp touch-switch S1, export and also can be in high level lock-out state.
When input voltage is lower than set point, after 3rd resistance R3, the 4th resistance R4 dividing potential drop, the base stage of triode Q1 becomes low level, triode Q1 is made to become shutoff from conducting, triode Q1 turns off, the base stage of triode Q1 is made to become high level, triode Q1 also turns off, Non voltage output, and working station indicator LED1 extinguishes.
When VCC recovers after normal condition, output voltage Vo is defaulted as low-voltage, can not output HIGH voltage automatically, because triode Q2 is in off state.After only pressing touch-switch S1, it is high level that the base voltage of triode Q1 obtains electric, triode Q1 conducting, make triode Q2 also conducting, Vo is that high voltage exports, and after the second resistance R2 and the 3rd resistance R3 dividing potential drop, the base stage of triode Q1 maintains high level, makes triode Q1, triode Q2 constant conduction, indicator light LED1 lights, and output voltage Vo becomes high level.
Compared with prior art; the present invention has following beneficial effect: under-voltage protecting circuit of the present invention and light fixture; can protect when battery undervoltage; extend the useful life of battery; and there is auto-lock function, prevent the generation causing economic loss and serious accident because of error closing device.
These are only better possible embodiments of the present invention, not limit the scope of the invention, all utilizations specification of the present invention and the change of the equivalent structure done by accompanying drawing content, be all included in protection scope of the present invention.

Claims (10)

1. a under-voltage protecting circuit, is characterized in that, it comprises:
Reset unit, it is for starting described under-voltage protecting circuit, and keeps described under-voltage protecting circuit work or disconnect with subordinate circuit, and it comprises input and output, and the input of described reset unit connects battery;
Detecting unit, whether it is for detecting the electricity of described battery lower than set point, and it comprises first input end, the second input and output, and the first input end of described detecting unit connects the output of described reset unit;
Control unit, it comprises input and output, and the input of described control unit connects the output of described detecting unit;
Switch element, it is controlled by described control unit, it comprises control end, input and output, the control end of described switch element connects the output of described control unit, the input of described switch element connects described battery, and the output of described switch element connects the second input and subordinate's circuit of described detecting unit;
Wherein, described reset unit starts described under-voltage protecting circuit work, and when described detecting unit detects the electricity of described battery lower than described set point, described control unit controls the connection that described switch element disconnects described battery and described subordinate circuit; When the electricity of described battery recovers normal, user restarts described under-voltage protecting circuit by described reset unit and could work; When described under-voltage protecting circuit is in running order, user only has could stop described under-voltage protecting circuit work by described reset unit.
2. under-voltage protecting circuit as claimed in claim 1, it is characterized in that, described reset unit comprises the first resistance and touch-switch, between the input that described first resistance and touch-switch are connected on described reset unit successively and output.
3. under-voltage protecting circuit as claimed in claim 1; it is characterized in that; described detecting unit comprises the second resistance and the 3rd resistance; one end of described second resistance connects the second input of described detecting unit; ground connection after described 3rd resistance of other end connection of described second resistance, described second resistance is all connected first input end and the output of described detecting unit with the junction of the 3rd resistance.
4. under-voltage protecting circuit as claimed in claim 1; it is characterized in that; described control unit comprises the first switching tube and the first electric capacity; described first switching tube comprises control end, input and output; the control end of described first switching tube connects the input of described control unit; the input of described first switching tube connects the output of described control unit, and the output head grounding of described first switch, between the base stage that described first electric capacity is connected to described first switching tube and emitter.
5. under-voltage protecting circuit as claimed in claim 4; it is characterized in that; described first switching tube is triode; the base stage of described triode is the control end of described first switching tube; the input of very described first switching tube of current collection of described triode, the output of very described first switching tube of transmitting of described triode.
6. under-voltage protecting circuit as claimed in claim 1; it is characterized in that; described switch element comprises second switch pipe and the 4th resistance; described second switch pipe comprises control end, input and output; the input of described second switch pipe connects the input of described switch element; the control end of described second switch pipe connects the control end of described switching tube unit; the output of described second switch pipe connects the output of described switch element, between the input that described 4th resistance is connected to described second switch pipe and control end.
7. under-voltage protecting circuit as claimed in claim 6; it is characterized in that; described second switch pipe is triode; the base stage of described triode is the control end of described second switch pipe; the input of the very described second switch pipe of transmitting of described triode, the output of the very described second switch pipe of current collection of described triode.
8. under-voltage protecting circuit as claimed in claim 1, it is characterized in that, described under-voltage protecting circuit also comprises indicating member, and whether it is under-voltage for showing described under-voltage protecting circuit, and described indicating member connects the output of described switch element.
9. under-voltage protecting circuit as claimed in claim 8, it is characterized in that, described indicating member comprises indicator light and the 5th resistance, between the output that described indicator light and the 5th resistance are connected on described switch element successively and ground.
10. a light fixture, is characterized in that, it comprises the under-voltage protecting circuit as described in claim 1 to 9 any one.
CN201310529204.XA 2013-10-30 2013-10-30 Under-voltage protection circuit and lamp Pending CN104600673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310529204.XA CN104600673A (en) 2013-10-30 2013-10-30 Under-voltage protection circuit and lamp

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Application Number Priority Date Filing Date Title
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CN104600673A true CN104600673A (en) 2015-05-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109103949A (en) * 2017-06-20 2018-12-28 通用电气公司 Battery management system
CN109450071A (en) * 2018-11-13 2019-03-08 湖南康通电子股份有限公司 A kind of power switching circuit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201490685U (en) * 2009-07-24 2010-05-26 深圳市中兴移动通信有限公司 Multifunction power protection circuit
CN201504096U (en) * 2009-07-30 2010-06-09 中兴通讯股份有限公司 Power supply circuit protection device
CN102231553A (en) * 2011-07-06 2011-11-02 天津市松正电动汽车技术股份有限公司 Battery management system with power supply control function
CN102570552A (en) * 2012-01-04 2012-07-11 周宇超 Multifunctional control and protection circuit for storage battery power supply
US20130155733A1 (en) * 2011-12-20 2013-06-20 Power Integrations, Inc. Generating a fast reset-signal using a fault-protection latch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201490685U (en) * 2009-07-24 2010-05-26 深圳市中兴移动通信有限公司 Multifunction power protection circuit
CN201504096U (en) * 2009-07-30 2010-06-09 中兴通讯股份有限公司 Power supply circuit protection device
CN102231553A (en) * 2011-07-06 2011-11-02 天津市松正电动汽车技术股份有限公司 Battery management system with power supply control function
US20130155733A1 (en) * 2011-12-20 2013-06-20 Power Integrations, Inc. Generating a fast reset-signal using a fault-protection latch
CN102570552A (en) * 2012-01-04 2012-07-11 周宇超 Multifunctional control and protection circuit for storage battery power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109103949A (en) * 2017-06-20 2018-12-28 通用电气公司 Battery management system
CN109450071A (en) * 2018-11-13 2019-03-08 湖南康通电子股份有限公司 A kind of power switching circuit

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Application publication date: 20150506