CN204578058U - A kind of vehicle-mounted high-voltage turn-off circuit - Google Patents
A kind of vehicle-mounted high-voltage turn-off circuit Download PDFInfo
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- CN204578058U CN204578058U CN201520164349.9U CN201520164349U CN204578058U CN 204578058 U CN204578058 U CN 204578058U CN 201520164349 U CN201520164349 U CN 201520164349U CN 204578058 U CN204578058 U CN 204578058U
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Abstract
A kind of vehicle-mounted high-voltage turn-off circuit; comprise voltage collection circuit, control circuit, switching circuit, set up under-voltage protecting circuit, when the voltage of storage battery positive pole is lower than 8V; second triode and the 5th triode ON, make the voltage V between the grid of switching tube and source electrode
gS=0, switching tube is in closed condition, plays under-voltage protection effect.After the voltage of storage battery positive pole is higher than 8V, the 4th triode ON, the second triode and the 5th triode are closed, and switching tube conducting, for subsequent conditioning circuit is powered.When the voltage of storage battery positive pole is higher than 33V, the first triode and the second triode ON, make the voltage V between the grid of switching tube and source electrode
gS=0, switching tube is in closed condition, plays overvoltage protection effect.The utility model not only can realize over-voltage protecting function, can also realize under-voltage protection function, can effectively prevent vehicular power-bottle depleted and cause car cannot start the generation of situation, extend the useful life of storage battery.
Description
Technical field
The utility model belongs to circuit supervision technical field, relates to a kind of vehicle-mounted high-voltage turn-off circuit.
Background technology
Overvoltage protection is for the protection of the destruction of subsequent conditioning circuit from throw load or instantaneous pressure; have a wide range of applications in automotive field; the patent No. be 201120188111.1 patent discloses a kind of vehicle-mounted high-voltage turn-off circuit; once the voltage that power supply exports reaches the peak of setting; just cut off the circuit between load and power supply, effectively ensure that load can not suffer damage because of high-voltage signal.But the electronic product in recent years sending a car gets more and more, after car is flame-out, much keep operating state in addition, their power supply source is exactly the storage battery on car, in vehicle commander's time idle situation, vehicular power-bottle is easy to depleted, causes car to start, even causes storage battery to damage.Dilly occurs that the words of this problem can be considered by go-cart, car to be push, but this large-scale car body of excavator can not be realized by go-cart, so excavator just can not start well.Therefore once occur low pressure, will be broken the equipment of some lasting electricity consumptions as soon as possible, but the patent that the patent No. is 201120188111.1 only has high pressure measuring ability, and function ratio is more single, the low-pressure state how carried out on detection vehicle power detects to be at present and is also in space state.
Summary of the invention
The utility model is in order to overcome the defect of prior art; devise a kind of vehicle-mounted high-voltage turn-off circuit; not only over-voltage protecting function can be realized; under-voltage protection function can also be realized; can effectively prevent vehicular power-bottle depleted and cause car cannot start the generation of situation, extend the useful life of storage battery.
The concrete technical scheme that the utility model adopts is: a kind of vehicle-mounted high-voltage turn-off circuit, comprises the voltage collection circuit, control circuit, the switching circuit that are connected between storage battery positive pole and load,
Switching circuit comprises switching tube, is connected after the source electrode differential concatenation rectifier diode of switching tube with storage battery positive pole, and the drain electrode of switching tube is connected with load and is connected with 24V DC power supply;
Voltage collection circuit comprises the first voltage stabilizing didoe, the first resistance, second resistance of connecting successively, the negative pole of the first voltage stabilizing didoe is connected with the source electrode of switching tube, the positive pole of the first voltage stabilizing didoe is connected with the first resistance, and the other end of the second resistance is connected to ground;
Control circuit comprises the first triode, second triode, 4th resistance, 5th resistance, the base stage of the first triode is connected with the mid point of the first resistance and the second resistance, the emitter of the first triode is connected to ground, be connected with the base stage of the second triode after collector electrode series connection the 3rd resistance of the first triode, the emitter of the second triode is connected with the source electrode of switching tube, the emitter of the second triode is connected successively after the 4th resistance and the 5th resistance and is connected to ground, the collector electrode of the second triode is connected with the mid point of the 4th resistance and the 5th resistance, the grid of switching tube is connected with the collector electrode of the second triode,
Key is: set up under-voltage protecting circuit, under-voltage protecting circuit comprises the 4th triode, 5th triode, 6th voltage stabilizing didoe, the base stage of the 4th triode is connected successively after the 6th resistance and the 7th resistance and is connected to ground, the positive pole of the 6th voltage stabilizing didoe is connected with the mid point of the 6th resistance and the 7th resistance, the negative pole of the 6th voltage stabilizing didoe is connected with the source electrode of switching tube, be connected with the source electrode of switching tube after collector electrode series connection the 9th resistance of the 4th triode, the collector electrode of the 4th triode is connected with the base stage of the 5th triode, be connected with the source electrode of switching tube after collector electrode series connection the 8th resistance of the 5th triode, the collector electrode of the 5th triode is connected with the collector electrode of the first triode, the emitter of the 4th triode and the emitter of the 5th triode are all connected to ground.
The voltage stabilizing value of the first described voltage stabilizing didoe is 33V, and the voltage stabilizing value of the 6th voltage stabilizing didoe is 8V.
Set up the second voltage stabilizing didoe that voltage stabilizing value is 15V, the positive pole of the second voltage stabilizing didoe is connected with the emitter of the first triode, and the negative pole of the second voltage stabilizing didoe is connected with the base stage of the first triode.
Set up the 3rd voltage stabilizing didoe that voltage stabilizing value is 36V, the positive pole of the 3rd voltage stabilizing didoe is connected with the emitter of the first triode, and the negative pole of the 3rd voltage stabilizing didoe is connected with the collector electrode of the first triode.
Set up the 4th voltage stabilizing didoe that voltage stabilizing value is 15V, the positive pole of the 4th voltage stabilizing didoe is connected with the base stage of the second triode, and the negative pole of the 4th voltage stabilizing didoe is connected with the emitter of the second triode.
Set up the 5th voltage stabilizing didoe that voltage stabilizing value is 15V, the positive pole of the 5th voltage stabilizing didoe is connected with the collector electrode of the second triode, and the negative pole of the 5th voltage stabilizing didoe is connected with the emitter of the second triode.
The beneficial effects of the utility model are: sampled by the voltage of voltage collection circuit to storage battery positive pole, and when the voltage of storage battery positive pole is lower than 8V, the second triode and the 5th triode ON, make the voltage V between the grid of switching tube and source electrode
gS=0, switching tube is in closed condition, plays under-voltage protection effect, can effectively prevent vehicular power-bottle depleted and cause car cannot start the generation of situation, extend the useful life of storage battery.After the voltage of storage battery positive pole is higher than 8V, the 4th triode ON, the second triode and the 5th triode are closed, and switching tube conducting, for subsequent conditioning circuit is powered.When the voltage of storage battery positive pole is higher than 33V, the first triode and the second triode ON, make the voltage V between the grid of switching tube and source electrode
gS=0, switching tube is in closed condition, plays overvoltage protection effect, effectively can prevent load to suffer damage because of high-voltage signal the generation of situation, can protect load better, extend the useful life of load.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
In accompanying drawing, V
+represent storage battery positive pole, VCC represents 24V DC power supply, D1 represents rectifier diode, Q1 represents the first triode, Q2 represents the second triode, Q3 representation switch pipe, Q4 represents the 4th triode, Q5 represents the 5th triode, ZD1 represents the first voltage stabilizing didoe, ZD2 represents the second voltage stabilizing didoe, ZD3 represents the 3rd voltage stabilizing didoe, ZD4 represents the 4th voltage stabilizing didoe, ZD5 represents the 5th voltage stabilizing didoe, ZD6 represents the 6th voltage stabilizing didoe, ZD7 represents the 7th voltage stabilizing didoe, R1 represents the first resistance, R2 represents the second resistance, R3 represents the 3rd resistance, R4 represents the 4th resistance, R5 represents the 5th resistance, R6 represents the 6th resistance, R7 represents the 7th resistance, R8 represents the 8th resistance, R9 represents the 9th resistance, C1 represents the first electric capacity, C201 represents the second electric capacity.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, a kind of vehicle-mounted high-voltage turn-off circuit, comprises and is connected to storage battery positive pole V
+and voltage collection circuit, control circuit, the switching circuit between load,
Switching circuit comprises switching tube Q3, with storage battery positive pole V after the source electrode differential concatenation rectifier diode D1 of switching tube Q3
+connect, the drain electrode of switching tube Q3 is connected with load and is connected with 24V DC power supply VCC;
Voltage collection circuit comprises the first voltage stabilizing didoe ZD1, the first resistance R1, the second resistance R2 that connect successively, the negative pole of the first voltage stabilizing didoe ZD1 is connected with the source electrode of switching tube Q3, the positive pole of the first voltage stabilizing didoe ZD1 is connected with the first resistance R1, the other end of the second resistance R2 is connected to ground, and the voltage stabilizing value of the first voltage stabilizing didoe ZD1 is 33V;
Control circuit comprises the first triode Q1, second triode Q2, 4th resistance R4, 5th resistance R5, the base stage of the first triode Q1 is connected with the mid point of the first resistance R1 and the second resistance R2, the emitter of the first triode Q1 is connected to ground, be connected with the base stage of the second triode Q2 after collector electrode series connection the 3rd resistance R3 of the first triode Q1, the emitter of the second triode Q2 is connected with the source electrode of switching tube Q3, the emitter of the second triode Q2 is connected successively after the 4th resistance R4 and the 5th resistance R5 and is connected to ground, the collector electrode of the second triode Q2 is connected with the mid point of the 4th resistance R4 and the 5th resistance R5, the grid of switching tube Q3 is connected with the collector electrode of the second triode Q2, 3rd resistance R3 plays metering function, prevent by the electric current of the first triode Q1 and the second triode Q2 excessive, the positive pole of the second voltage stabilizing didoe ZD2 is connected with the emitter of the first triode Q1, the negative pole of the second voltage stabilizing didoe ZD2 is connected with the base stage of the first triode Q1, the base stage of the first triode Q1 is shielded, prevent the base voltage of the first triode Q1 more than 15V, the positive pole of the 3rd voltage stabilizing didoe ZD3 is connected with the emitter of the first triode Q1, the negative pole of the 3rd voltage stabilizing didoe ZD3 is connected with the collector electrode of the first triode Q1, the collector and emitter of the first triode Q1 is shielded, voltage between the collector and emitter preventing the first triode Q1 is more than 36V, the positive pole of the 4th voltage stabilizing didoe ZD4 is connected with the base stage of the second triode Q2, the negative pole of the 4th voltage stabilizing didoe ZD4 is connected with the emitter of the second triode Q2, the emitter of the second triode Q2 and base stage are shielded, prevent voltage between the emitter of the second triode Q2 and base stage more than 15V, the positive pole of the 5th voltage stabilizing didoe ZD5 is connected with the collector electrode of the second triode Q2, the negative pole of the 5th voltage stabilizing didoe ZD5 is connected with the emitter of the second triode Q2, the emitter and collector of the second triode Q2 is shielded, voltage between the emitter and collector preventing the second triode Q2 is more than 15V,
Under-voltage protecting circuit comprises the 4th triode Q4, 5th triode Q5, 6th voltage stabilizing didoe ZD6, the voltage stabilizing value of the 6th voltage stabilizing didoe ZD6 is 8V, the base stage of the 4th triode Q4 is connected successively after the 6th resistance R6 and the 7th resistance R7 and is connected to ground, the positive pole of the 6th voltage stabilizing didoe ZD6 is connected with the mid point of the 6th resistance R6 and the 7th resistance R7, the negative pole of the 6th voltage stabilizing didoe ZD6 is connected with the source electrode of switching tube Q3, be connected with the source electrode of switching tube Q3 after collector electrode series connection the 9th resistance R9 of the 4th triode Q4, the collector electrode of the 4th triode Q4 is connected with the base stage of the 5th triode Q5, be connected with the source electrode of switching tube Q3 after collector electrode series connection the 8th resistance R8 of the 5th triode Q5, the collector electrode of the 5th triode Q5 is connected with the collector electrode of the first triode Q1, the emitter of the 4th triode Q4 and the emitter of the 5th triode Q5 are all connected to ground.
Operation principle of the present utility model is: as storage battery positive pole V
+voltage lower than 8V time, first voltage stabilizing didoe ZD1 and the 6th voltage stabilizing didoe ZD6 is in reverse blocking state, first triode Q1, the 4th triode Q4 end, and the second triode Q2 and the 5th triode Q5 conducting, make the voltage V between the grid of switching tube Q3 and source electrode
gS=0, switching tube Q3 is in closed condition, plays under-voltage protection effect, can effectively prevent vehicular power-bottle depleted and cause car cannot start the generation of situation, extend the useful life of storage battery.
As storage battery positive pole V
+voltage reach 8V after, the 4th triode Q4 conducting, the second triode Q2 and the 5th triode Q5 closes, and makes the voltage V between the grid of switching tube Q3 and source electrode
gSproduced by the 4th resistance R4 and the 5th resistance R5 dividing potential drop, switching tube Q3 conducting, for subsequent conditioning circuit is powered.
As storage battery positive pole V
+voltage higher than 33V time, the first triode Q1 and the second triode Q2 conducting, make the voltage V between the grid of switching tube Q3 and source electrode
gS=0, switching tube Q3 is in closed condition, plays overvoltage protection effect, effectively can prevent load to suffer damage the generation of situation because of high-voltage signal, can protect load better, extend the useful life of load.
Claims (6)
1. a vehicle-mounted high-voltage turn-off circuit, comprises and is connected to storage battery positive pole (V
+) and load between voltage collection circuit, control circuit, switching circuit,
Switching circuit comprises switching tube (Q3), the source electrode differential concatenation rectifier diode (D1) of switching tube (Q3) afterwards with storage battery positive pole (V
+) connect, the drain electrode of switching tube (Q3) is connected with load and is connected with 24V DC power supply (VCC);
Voltage collection circuit comprises the first voltage stabilizing didoe (ZD1), the first resistance (R1), second resistance (R2) of connecting successively, the negative pole of the first voltage stabilizing didoe (ZD1) is connected with the source electrode of switching tube (Q3), the positive pole of the first voltage stabilizing didoe (ZD1) is connected with the first resistance (R1), and the other end of the second resistance (R2) is connected to ground;
Control circuit comprises the first triode (Q1), second triode (Q2), 4th resistance (R4), 5th resistance (R5), the base stage of the first triode (Q1) is connected with the mid point of the first resistance (R1) and the second resistance (R2), the emitter of the first triode (Q1) is connected to ground, collector electrode series connection the 3rd resistance (R3) of the first triode (Q1) is connected with the base stage of the second triode (Q2) afterwards, the emitter of the second triode (Q2) is connected with the source electrode of switching tube (Q3), the emitter of the second triode (Q2) is connected successively after the 4th resistance (R4) and the 5th resistance (R5) and is connected to ground, the collector electrode of the second triode (Q2) is connected with the mid point of the 4th resistance (R4) and the 5th resistance (R5), the grid of switching tube (Q3) is connected with the collector electrode of the second triode (Q2),
It is characterized in that: set up under-voltage protecting circuit, under-voltage protecting circuit comprises the 4th triode (Q4), 5th triode (Q5), 6th voltage stabilizing didoe (ZD6), the base stage of the 4th triode (Q4) is connected successively after the 6th resistance (R6) and the 7th resistance (R7) and is connected to ground, the positive pole of the 6th voltage stabilizing didoe (ZD6) is connected with the mid point of the 6th resistance (R6) and the 7th resistance (R7), the negative pole of the 6th voltage stabilizing didoe (ZD6) is connected with the source electrode of switching tube (Q3), collector electrode series connection the 9th resistance (R9) of the 4th triode (Q4) is connected with the source electrode of switching tube (Q3) afterwards, the collector electrode of the 4th triode (Q4) is connected with the base stage of the 5th triode (Q5), collector electrode series connection the 8th resistance (R8) of the 5th triode (Q5) is connected with the source electrode of switching tube (Q3) afterwards, the collector electrode of the 5th triode (Q5) is connected with the collector electrode of the first triode (Q1), the emitter of the 4th triode (Q4) and the emitter of the 5th triode (Q5) are all connected to ground.
2. a kind of vehicle-mounted high-voltage turn-off circuit according to claim 1, is characterized in that: the voltage stabilizing value of described the first voltage stabilizing didoe (ZD1) is 33V, and the voltage stabilizing value of the 6th voltage stabilizing didoe (ZD6) is 8V.
3. a kind of vehicle-mounted high-voltage turn-off circuit according to claim 1, it is characterized in that: set up the second voltage stabilizing didoe (ZD2) that voltage stabilizing value is 15V, the positive pole of the second voltage stabilizing didoe (ZD2) is connected with the emitter of the first triode (Q1), and the negative pole of the second voltage stabilizing didoe (ZD2) is connected with the base stage of the first triode (Q1).
4. a kind of vehicle-mounted high-voltage turn-off circuit according to claim 1, it is characterized in that: set up the 3rd voltage stabilizing didoe (ZD3) that voltage stabilizing value is 36V, the positive pole of the 3rd voltage stabilizing didoe (ZD3) is connected with the emitter of the first triode (Q1), and the negative pole of the 3rd voltage stabilizing didoe (ZD3) is connected with the collector electrode of the first triode (Q1).
5. a kind of vehicle-mounted high-voltage turn-off circuit according to claim 1, it is characterized in that: set up the 4th voltage stabilizing didoe (ZD4) that voltage stabilizing value is 15V, the positive pole of the 4th voltage stabilizing didoe (ZD4) is connected with the base stage of the second triode (Q2), and the negative pole of the 4th voltage stabilizing didoe (ZD4) is connected with the emitter of the second triode (Q2).
6. a kind of vehicle-mounted high-voltage turn-off circuit according to claim 1, it is characterized in that: set up the 5th voltage stabilizing didoe (ZD5) that voltage stabilizing value is 15V, the positive pole of the 5th voltage stabilizing didoe (ZD5) is connected with the collector electrode of the second triode (Q2), and the negative pole of the 5th voltage stabilizing didoe (ZD5) is connected with the emitter of the second triode (Q2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520164349.9U CN204578058U (en) | 2015-03-23 | 2015-03-23 | A kind of vehicle-mounted high-voltage turn-off circuit |
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|---|---|---|---|
| CN201520164349.9U CN204578058U (en) | 2015-03-23 | 2015-03-23 | A kind of vehicle-mounted high-voltage turn-off circuit |
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| CN204578058U true CN204578058U (en) | 2015-08-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054809A (en) * | 2018-01-23 | 2018-05-18 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
| CN109494831A (en) * | 2018-11-12 | 2019-03-19 | 前海远程信息科技(深圳)有限公司 | Vehicular power protective circuit |
| CN110474298A (en) * | 2019-07-15 | 2019-11-19 | 上海锐承通讯技术有限公司 | A kind of detection of simple vehicle-mounted storage battery and protection circuit |
| CN113690846A (en) * | 2021-07-15 | 2021-11-23 | 深圳市有为信息技术发展有限公司 | Overvoltage protection circuit, vehicle-mounted terminal and commercial vehicle |
| CN114284991A (en) * | 2021-12-29 | 2022-04-05 | 南京英锐创电子科技有限公司 | Overvoltage protection circuit and chip control circuit |
-
2015
- 2015-03-23 CN CN201520164349.9U patent/CN204578058U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054809A (en) * | 2018-01-23 | 2018-05-18 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
| CN109494831A (en) * | 2018-11-12 | 2019-03-19 | 前海远程信息科技(深圳)有限公司 | Vehicular power protective circuit |
| CN109494831B (en) * | 2018-11-12 | 2022-06-17 | 前海远程信息科技(深圳)有限公司 | Vehicle-mounted power supply protection circuit |
| CN110474298A (en) * | 2019-07-15 | 2019-11-19 | 上海锐承通讯技术有限公司 | A kind of detection of simple vehicle-mounted storage battery and protection circuit |
| CN110474298B (en) * | 2019-07-15 | 2021-09-28 | 上海锐承通讯技术有限公司 | Simple vehicle-mounted storage battery detection and protection circuit |
| CN113690846A (en) * | 2021-07-15 | 2021-11-23 | 深圳市有为信息技术发展有限公司 | Overvoltage protection circuit, vehicle-mounted terminal and commercial vehicle |
| CN114284991A (en) * | 2021-12-29 | 2022-04-05 | 南京英锐创电子科技有限公司 | Overvoltage protection circuit and chip control circuit |
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