CN102545163A - Battery discharge protection circuit and LED (Light Emitting Diode) lamp - Google Patents
Battery discharge protection circuit and LED (Light Emitting Diode) lamp Download PDFInfo
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- CN102545163A CN102545163A CN201010604176XA CN201010604176A CN102545163A CN 102545163 A CN102545163 A CN 102545163A CN 201010604176X A CN201010604176X A CN 201010604176XA CN 201010604176 A CN201010604176 A CN 201010604176A CN 102545163 A CN102545163 A CN 102545163A
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Abstract
The invention is suitable for the field of the battery protection circuit and provides a battery discharge protection circuit and an LED (Light Emitting Diode) lamp. The battery discharge protection circuit comprises a battery, a voltage stabilization unit, a control unit, a switching unit and a voltage sampling unit, wherein the detection end of the control unit is connected with the anode of the battery by the voltage sampling unit; the output end of the control unit is connected with the control end of the switching unit; and the control unit is used for switching off or conducting a circuit between the battery and a load by controlling the switching unit according to the detected battery discharging state. In the embodiment of the invention, the battery discharge protection circuit comprises the switching unit and the control unit, the control unit detects that the battery is subjected to over discharge, and the switching unit is controlled to switch off a discharge passage between the battery and the load so as to prevent the battery from over discharge and prolong the service life of the battery.
Description
Technical field
The invention belongs to the battery protecting circuit field, relate in particular to a kind of battery discharge prevention circuit and LED light fixture.
Background technology
Battery is widely used in the middle of the daily life as electronic installation commonly used, and common battery has lead-acid battery, nickel-cadmium cell and lithium ion battery etc.
Now, develop short-circuit protection, its objective is, play the effect of protection for when short circuit appears in battery for battery.And battery the phenomenon of over-discharge can also may occur except the phenomenon of short circuit occurring, and over-discharge can shorten the useful life of battery.But, the also untapped now protective circuit that goes out can prevent the battery over-discharge can.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of battery discharge prevention circuit, is intended to solve the problem that can't solve the battery over-discharge can now.
The embodiment of the invention is achieved in that a kind of battery discharge prevention circuit, and said battery discharge prevention circuit comprises: battery, voltage regulation unit, control unit, switch element and voltage sample unit; Wherein,
Said voltage regulation unit is electrically connected with the positive pole of said battery and the operating voltage input of control unit respectively, for said control unit provides a stabilized voltage power supply;
The test side of said control unit is connected with the positive pole of battery through a voltage sample unit; The control end of the output termination switch element of said control unit; Said control unit is used for according to detected battery discharge status, through controlling the circuit between said switch element shutoff or said battery of conducting and the load;
Said switch element comprises first switching tube; And the second switch pipe that is electrically connected with said first switching tube; Said first control end of switching tube is connected with the output of said control unit; The output termination load of said second switch pipe, the positive pole of the input termination battery of said second switch pipe;
The minus earth of battery.Another purpose of the embodiment of the invention is to provide a kind of LED light fixture that comprises above-mentioned battery discharge prevention circuit.
In embodiments of the present invention; Battery discharge prevention circuit comprises switch element and control unit, and control unit detects the battery over-discharge can, and control switch unit is turn-offed the discharge path between battery and the load; Thereby can prevent the battery over-discharge can, improve the useful life of battery.
Description of drawings
Fig. 1 is the module map of the battery discharge prevention circuit that provides of the embodiment of the invention;
Fig. 2 is the exemplary circuit figure of the battery discharge prevention circuit that provides of the embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 shows the modular structure of the battery discharge prevention circuit that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Battery discharge prevention circuit comprises: battery 500, voltage regulation unit 400, control unit 200, switch element 100 and voltage sample unit 600; Wherein,
The test side of control unit 200 is connected with the positive pole of battery 500 through a voltage sample unit 600; The control end of the output termination switch element 100 of control unit 200; Control unit 200 is used for according to detected battery 500 discharge conditions, through the circuit between control switch unit 100 shutoffs or turn-on battery 500 and the load;
The minus earth of battery 500.
Fig. 2 shows the exemplary circuit structure of the battery discharge prevention circuit that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
As one embodiment of the invention; Control unit 200 adopts Attiny13 type control chip U1; The test side b4/adc2 of control chip U1 is the test side of control unit 200; The output b1 of control chip U1 is the output of control unit 200, the earth terminal gnd ground connection of control chip U1, and the power end VCC of control chip U1 is the operating voltage input of control unit 200.
As one embodiment of the invention; Voltage sample unit 600 comprises the first voltage sample resistance R 1 and the second voltage sample resistance R 2; The second voltage sample resistance R, 2 one ends are connected with the positive pole of battery BT; The other end is connected with an end of the first voltage sample resistance R 1, and the other end of the first voltage sample resistance R 1 is connected back ground connection with the earth terminal gnd of control chip U1, and the points of common connection of the first voltage sample resistance R 1 and the second voltage sample resistance R 2 is connected with the test side b4/adc2 of control chip U1.
As one embodiment of the invention, first switching tube 101 is triode Q1, and second switch pipe 102 is switching tube Q2; The base stage of this triode Q1 is as the control end of switch element 100; Be connected with the output of control unit 200, the grounded emitter of this triode Q1, the collector electrode of this triode Q1 is electrically connected with the control end G of switching tube Q2; It is anodal that the input S of switching tube Q2 meets battery BT, and the output D of switching tube Q2 connects load.
As one embodiment of the invention, the base stage of triode Q1 is electrically connected with the output of control unit 200 through the first driving resistor R3; The base stage of triode Q1 is through the second driving resistor R7 ground connection.
As one embodiment of the invention, switching tube Q2 adopts 4435 models.
As one embodiment of the invention, the control end G of switching tube Q2 is electrically connected with the collector electrode of triode Q1 through the 3rd driving resistor R6; Be connected with the moving resistance R 5 of 4 wheel driven between the control end G of switching tube Q2 and the input S.
As one embodiment of the invention; Battery discharge prevention circuit also comprises the Auxiliary Control Element 300 that connects control unit 200; Being used to control control unit 200 makes switch element 100 turn-off or connect the discharge path between battery BT and the load; Auxiliary Control Element 300 is a key switch SW, the input b0 of the first termination control chip U1 of key switch SW, the second end ground connection of key switch SW.
As one embodiment of the invention; Voltage regulation unit 400 comprises current-limiting resistance R4, voltage-stabiliser tube U2 and filter capacitor C1; The voltage input end in of voltage-stabiliser tube U2 is connected with the positive pole of battery BT through current-limiting resistance R4; The output out of voltage-stabiliser tube U2 holds between the gnd with ground and is connected in series filter capacitor C1, the ground end gnd ground connection of voltage-stabiliser tube U2, and the output out of voltage-stabiliser tube U2 is electrically connected with the operating voltage input of 200 control units.
Another purpose of the embodiment of the invention is to provide a kind of LED light fixture that comprises above-mentioned battery discharge prevention circuit.
For example the operation principle of battery discharge prevention circuit is described below:
When control chip U1 detects cell voltage and is lower than 19V, can turn-off triode Q1 by the output low level signal, on-off switching tube Q2 indirectly, battery just can stop power consumption like this; When control chip U1 detects cell voltage and is higher than 22V, can export high level and open triode Q1, open switching tube Q2 indirectly, battery is normally powered to the load.Switching tube Q2 can change the switching tube of different model according to need of load, adjusts its ability of passing through electric current.
In addition, through manual control key switch SW, can send control signal to control chip U1, control chip U1 turn-offs switching tube Q2 or connects the discharge path between battery and the load.
In embodiments of the present invention; Battery discharge prevention circuit comprises switch element and control unit, and control unit detects the battery over-discharge can, and control switch unit is turn-offed the discharge path between battery and the load; Thereby can prevent the battery over-discharge can, improve the useful life of battery.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a battery discharge prevention circuit is characterized in that, said battery discharge prevention circuit comprises: battery, voltage regulation unit, control unit, switch element and voltage sample unit; Wherein,
Said voltage regulation unit is electrically connected with the positive pole of said battery and the operating voltage input of control unit respectively, for said control unit provides a stabilized voltage power supply;
The test side of said control unit is connected with the positive pole of battery through a voltage sample unit; The control end of the output termination switch element of said control unit; Said control unit is used for according to detected battery discharge status, through controlling the circuit between said switch element shutoff or said battery of conducting and the load;
Said switch element comprises first switching tube; And the second switch pipe that is electrically connected with said first switching tube; Said first control end of switching tube is connected with the output of said control unit; The output termination load of said second switch pipe, the positive pole of the input termination battery of said second switch pipe;
The minus earth of battery.
2. battery discharge prevention circuit as claimed in claim 1; It is characterized in that; Said control unit adopts Attiny13 type control chip, and the test side of said control chip is the test side of said control unit, and the output of said control chip is the output of said control unit; The earth terminal ground connection of said control chip, the power end of said control chip are the operating voltage input of said control unit.
3. battery discharge prevention circuit as claimed in claim 2; It is characterized in that; Said voltage sample unit comprises the first voltage sample resistance R 1 and the second voltage sample resistance R 2; The said second voltage sample resistance R, 2 one ends are connected with the positive pole of said battery; The other end is connected with an end of the said first voltage sample resistance R 1, and the other end of the said first voltage sample resistance R 1 is connected back ground connection with the earth terminal of said control chip, and the points of common connection of the said first voltage sample resistance R 1 and the second voltage sample resistance R 2 is connected with the test side of said control chip.
4. battery discharge prevention circuit as claimed in claim 1 is characterized in that, said first switching tube is triode Q1; Said second switch pipe is switching tube Q2, and the base stage of this triode Q1 is connected with the output of said control unit as the control end of said switch element; The grounded emitter of this triode Q1; The collector electrode of this triode Q1 is electrically connected with the control end of said switching tube Q2, the input termination anode of said switching tube Q2, the output termination load of said switching tube Q2.
5. battery discharge prevention circuit as claimed in claim 4 is characterized in that, the base stage of said triode Q1 is electrically connected with the output of said control unit through the first driving resistor R3; The base stage of said triode Q1 is through the second driving resistor R7 ground connection.
6. battery discharge prevention circuit as claimed in claim 4 is characterized in that, said switching tube Q2 adopts 4435 models.
7. battery discharge prevention circuit as claimed in claim 4 is characterized in that, the control end of said switching tube Q2 is electrically connected with the collector electrode of said triode Q1 through the 3rd driving resistor R6; Be connected with the moving resistance R 5 of 4 wheel driven between the control end of said switching tube Q2 and the input.
8. battery discharge prevention circuit as claimed in claim 2; It is characterized in that; Said battery discharge prevention circuit also comprises the Auxiliary Control Element that connects said control unit, is used to control said control unit and makes said switch element shutoff or connect the discharge path between said battery and the load, and said Auxiliary Control Element is a key switch; The input of the said control chip of first termination of said key switch, the second end ground connection of said key switch.
9. battery discharge prevention circuit as claimed in claim 1; It is characterized in that; Said voltage regulation unit comprises current-limiting resistance R4, voltage-stabiliser tube and filter capacitor C1, and the voltage input end of said voltage-stabiliser tube is connected with the positive pole of battery through current-limiting resistance R4, the output of said voltage-stabiliser tube be connected in series filter capacitor C1 between ground is held; The ground end ground connection of said voltage-stabiliser tube, the output of said voltage-stabiliser tube is electrically connected with the operating voltage input of said control unit.
10. a LED light fixture is characterized in that, said LED light fixture comprises each described battery discharge prevention circuit like claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010604176XA CN102545163A (en) | 2010-12-24 | 2010-12-24 | Battery discharge protection circuit and LED (Light Emitting Diode) lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010604176XA CN102545163A (en) | 2010-12-24 | 2010-12-24 | Battery discharge protection circuit and LED (Light Emitting Diode) lamp |
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| Publication Number | Publication Date |
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| CN102545163A true CN102545163A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010604176XA Pending CN102545163A (en) | 2010-12-24 | 2010-12-24 | Battery discharge protection circuit and LED (Light Emitting Diode) lamp |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103687126A (en) * | 2012-09-19 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Lamp and lamp charging overvoltage protection circuit |
| CN103779839A (en) * | 2014-01-24 | 2014-05-07 | 南京邮电大学 | Automatic opening type starting circuit powered up by rechargeable battery |
| CN103812088A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Electricity-taking protection device |
| CN104218539A (en) * | 2013-05-29 | 2014-12-17 | 惠州市吉瑞科技有限公司 | Charging circuit and charging method capable of preventing reverse connection of rechargeable power supply |
| CN104426138A (en) * | 2013-08-20 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Over-discharge protection circuit of chargeable battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03139120A (en) * | 1989-10-25 | 1991-06-13 | Akuson Data Mach Kk | Battery overdischarge prevention circuit |
| US20030096158A1 (en) * | 2001-11-21 | 2003-05-22 | Hitachi Koki Co., Ltd. | Battery pack and cordless power tool using the same as power source |
| US20070188142A1 (en) * | 2006-01-18 | 2007-08-16 | Takao Nakashimo | Charging and discharging control circuit and charging type power supply device |
-
2010
- 2010-12-24 CN CN201010604176XA patent/CN102545163A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03139120A (en) * | 1989-10-25 | 1991-06-13 | Akuson Data Mach Kk | Battery overdischarge prevention circuit |
| US20030096158A1 (en) * | 2001-11-21 | 2003-05-22 | Hitachi Koki Co., Ltd. | Battery pack and cordless power tool using the same as power source |
| US20070188142A1 (en) * | 2006-01-18 | 2007-08-16 | Takao Nakashimo | Charging and discharging control circuit and charging type power supply device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103687126A (en) * | 2012-09-19 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Lamp and lamp charging overvoltage protection circuit |
| CN103687126B (en) * | 2012-09-19 | 2017-07-28 | 深圳市海洋王照明工程有限公司 | Light fixture and light fixture charging overvoltage protection circuit |
| CN103812088A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Electricity-taking protection device |
| CN104218539A (en) * | 2013-05-29 | 2014-12-17 | 惠州市吉瑞科技有限公司 | Charging circuit and charging method capable of preventing reverse connection of rechargeable power supply |
| CN104426138A (en) * | 2013-08-20 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Over-discharge protection circuit of chargeable battery |
| CN103779839A (en) * | 2014-01-24 | 2014-05-07 | 南京邮电大学 | Automatic opening type starting circuit powered up by rechargeable battery |
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Application publication date: 20120704 |