CN209730800U - A kind of automobile power source line protective devices - Google Patents
A kind of automobile power source line protective devices Download PDFInfo
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- CN209730800U CN209730800U CN201790000141.0U CN201790000141U CN209730800U CN 209730800 U CN209730800 U CN 209730800U CN 201790000141 U CN201790000141 U CN 201790000141U CN 209730800 U CN209730800 U CN 209730800U
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency 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
- H02H7/10—Emergency 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 converters; for rectifiers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
A kind of automobile power source line protective devices, it include: the current detecting unit (10) being connected with equipment power supply signal, the voltage detection unit (20) being connected between control unit (30) and output interface, respectively with current detecting unit (10), voltage detection unit (20) and the control unit (30) of switch unit (40) connection, the switch unit (40) being connected with control unit (30) and current detecting unit (10) and the one-way conduction unit (50) being connected between switch unit (40) and output interface, the electric current and voltage of automobile power source route are detected by current detecting unit (10) and voltage detection unit (10), and the feedback current abnormal signal when electric current exceeds predetermined current range, the feedback voltage abnormal signal when voltage exceeds predetermined voltage range Control unit (30) receives meeting control switch unit (40) shutdown after current anomaly signal or electric voltage exception signal, and then disconnects power circuit, and electronic equipment is protected not to be damaged; it improves the safety of power circuit and realizes simply, it is at low cost.
Description
Technical field
The utility model relates to electronic technology field more particularly to a kind of automobile power source line protective devices.
Background technique
Since the electronic equipment on automobile is numerous and wiring is complicated, often since wiring error causes electronic equipment to damage
It is bad, further, since the cable on automobile is often worn and will cause cable damage, and then electronic equipment is caused to damage, in order to subtract
It is few to cause electronic equipment to be damaged due to cable connection error or cable damage, it will usually to use special connector and harness
Protector realizes route protection function, and special connector can reduce artificial wrong line, and Bindle wire protector can reduce cable mill
Damage.It is not tackled the problem at its root using special connector and Bindle wire protector, still occurs route wrong and damage can
Energy property, and then electronic equipment is caused to be damaged.In addition, special connector and Bindle wire protector can all increase additional cost.
In conclusion existing automobile power source route guard method has that safety is low and at high cost.
Utility model content
It is low and at high cost that there are safeties in order to solve the problems, such as existing automobile power source route guard method, this is practical new
Type embodiment provides a kind of automobile power source line protective devices.
The purpose of this utility model is to provide a kind of automobile power source line protective devices comprising:
Current detecting unit is connected with equipment power supply signal, for the electric current of detection device, and in the electric current beyond pre-
If feedback current abnormal signal when current range；
Voltage detection unit is connected between control unit and output interface, and the voltage detection unit is set for detecting
Standby voltage, and the feedback voltage abnormal signal when the voltage exceeds predetermined voltage range；
Control unit is connect with the current detecting unit, the voltage detection unit and switch unit respectively, described
Control unit is used to feed back corresponding control letter according to the testing result of the current detecting unit and the voltage detection unit
Number；
Switch unit is connected with described control unit and the current detecting unit, and the switch unit is used for according to institute
The control signal for stating control unit is connected or is turned off；
One-way conduction unit, is connected between switch unit and output interface, and the one-way conduction unit is for unidirectionally leading
Circuit passband prevents foreign current from entering equipment.
The utility model provides a kind of automobile power source line protective devices, comprising: the electric current being connected with equipment power supply signal
Detection unit, the voltage detection unit being connected between control unit and output interface, respectively with the current detecting unit, institute
The control unit for stating voltage detection unit and switch unit connection, is connected with described control unit and the current detecting unit
Switch unit and the one-way conduction unit that is connected between switch unit and output interface, pass through current detecting unit and electricity
The electric current and voltage of detection unit detection automobile power source route are pressed, and feedback current is abnormal when electric current exceeds predetermined current range
Signal, voltage exceed predetermined voltage range when feedback voltage abnormal signal, control unit receive current anomaly signal or
Meeting control switch unit shutdown after electric voltage exception signal, and then power circuit is disconnected, protect electronic equipment not to be damaged, in addition,
By one-way conduction unit can only unilateal conduction, be effectively prevented foreign current damage equipment, improve the safety of power circuit
Property and realize simple, at low cost, there are safety is low and cost for the existing automobile power source route guard method of effective solution
High problem.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of automobile power source line protective devices provided by the embodiment of the utility model；
Fig. 2 is current detecting unit in a kind of automobile power source line protective devices of another embodiment offer of the utility model
Electrical block diagram；
Fig. 3 is voltage detection unit in a kind of automobile power source line protective devices of another embodiment offer of the utility model
Structural schematic diagram；
Fig. 4 is a kind of electrical block diagram of automobile power source line protective devices provided by the embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
It is low and at high cost that there are safeties in order to solve the problems, such as existing automobile power source route guard method, this is practical new
Type embodiment provides a kind of automobile power source line protective devices, detects automobile by current detecting unit and voltage detection unit
The electric current and voltage of power circuit, and the feedback current abnormal signal when electric current exceeds predetermined current range, in voltage beyond pre-
If feedback voltage abnormal signal when voltage range, control unit can be controlled after receiving current anomaly signal or electric voltage exception signal
Switch unit shutdown processed, and then power circuit is disconnected, protect electronic equipment not to be damaged, in addition, passing through one-way conduction unit energy
Enough only unilateal conductions are effectively prevented foreign current damage equipment, improve the safety of power circuit and realize simple, cost
It is low.
In order to illustrate technical solution provided by the utility model embodiment, said below by specific embodiment
It is bright.
Fig. 1 shows a kind of structure of automobile power source line protective devices provided by the embodiment of the utility model, such as Fig. 1 institute
Show, automobile power source line protective devices 100 include: current detecting unit 10, voltage detection unit 20, control unit 30, switch
Unit 40 and one-way conduction unit 50.
Current detecting unit 10 is connected with equipment power supply signal, for the electric current of detection device, and in electric current beyond default
Feedback current abnormal signal when current range.
Voltage detection unit 20 is connected between control unit 30 and output interface, and voltage detection unit 20 is for detecting
The voltage of equipment, and the feedback voltage abnormal signal when voltage exceeds predetermined voltage range.
Control unit 30 is connect with current detecting unit 10, voltage detection unit 20 and switch unit 40 respectively, control
Unit 30 is used to feed back corresponding control signal according to the testing result of current detecting unit 10 and voltage detection unit 20.
Switch unit 40 is connected with control unit 30 and current detecting unit 20, and switch unit 40 is used for single according to control
The control signal of member 30 is connected or is turned off.
One-way conduction unit 50 is connected between switch unit 40 and output interface, and one-way conduction unit 50 is for unidirectional
Turning circuit prevents foreign current from entering equipment.
Current detecting unit 10 detects the electric current of automobile power source route, voltage detection unit 20 detects automobile power source route
Voltage, the feedback current abnormal signal when electric current exceeds predetermined current range of current detecting unit 10 are given to control unit 30, electricity
Pressure detection unit 20 feedback voltage abnormal signal when voltage exceeds predetermined voltage range is given to control unit 30, control unit 30
Meeting control switch unit 40 turns off after receiving current anomaly signal or electric voltage exception signal, and then disconnects power circuit, leads to
50 unilateal conduction of one-way conduction unit is crossed, foreign current damage equipment is effectively prevented, improves the safety of power circuit.
Further, as a kind of possibility realized of the utility model embodiment, above-mentioned current detecting unit 10 includes:
Signal amplification unit and comparing unit.
Signal amplification unit, for obtaining corresponding voltage according to the electric current of power supply signal, and the voltage that will acquire into
The amplification of row signal；
Comparing unit is connected with signal amplification unit, and comparing unit is used for the amplified voltage value of signal and first is pre-
If voltage threshold is compared, and when the amplified voltage value of signal is greater than the first predetermined voltage threshold, feedback current is abnormal
Signal.
Fig. 2 shows a kind of current detectings for automobile power source line protective devices that another embodiment of the utility model provides
The circuit structure of unit 10, as shown in Fig. 2, above-mentioned current detecting unit includes: signal amplification unit 11 and comparing unit 12.
As a kind of implementation of the utility model embodiment, above-mentioned signal amplification unit 11 include first resistor R1 and
Operational amplifier U1.
The first end of first resistor R1 is connected with equipment power supply signal, second end and 40 phase of switch unit of first resistor R1
Even, the first input end of operational amplifier U1 is connect with the first end of first resistor R1, the second input terminal of operational amplifier U2
It is connect with the second end of first resistor R1, the output end of operational amplifier U1 is connect with comparing unit 12.
Preferably as a kind of implementation of the utility model embodiment, above-mentioned comparing unit 12 includes first voltage
Comparator U2.
The first input end of first voltage comparator U2 is connected with signal amplification unit 11, and the of first voltage comparator U2
Two input terminals access the first predeterminated voltage V1, and the output end of first voltage comparator U1 is connected with control unit 30.
It should be noted that above-mentioned first predeterminated voltage V1 refers to, in order to which whether the electric current of weighing device power supply signal surpasses
Predetermined current range and the voltage value that sets out.
Fig. 3 shows a kind of voltage detecting for automobile power source line protective devices that another embodiment of the utility model provides
The circuit structure of unit 20, as shown in figure 3, voltage detection unit 20 includes second voltage comparator U3.
The first input end of second voltage comparator U3 is connected with output interface, the second input of second voltage comparator U2
It terminates into the second predeterminated voltage V2, the output end of second voltage comparator U2 is connected with control unit 30.
It should be noted that above-mentioned second predeterminated voltage V2 refers in order to which whether the equipment voltage of measurement exceeds predeterminated voltage
Range and the voltage value set.
Fig. 4 is referred to, Fig. 4 shows a kind of automobile power source line protective devices that another embodiment of the utility model provides
Circuit structure diagram, as shown in figure 4, above-mentioned switch unit 40 include switching tube Q1.
The controlled end of switching tube Q1 is connected with control unit 30, and the hot end and current detecting unit 10 of switching tube Q1 connects
It connects, the cold end of switching tube Q1 is connect with one-way conduction unit 50.
Preferably, above-mentioned switching tube Q1 is PMOS tube, and the controlled end of switching tube Q1 is the grid of PMOS tube, Q1 switching tube
Hot end is the source electrode of PMOS tube, and the cold end of Q1 switching tube is the drain electrode of PMOS tube.
Preferably, above-mentioned one-way conduction unit 50 includes diode D1, and the anode of diode D1 is connected with switch unit 40,
The cathode of diode D1 is connected with output interface.
Preferably, above-mentioned control unit 30 include logic control element U4, the first control terminal of logic control element U4 with
Current detecting unit 10 is connected, and the second control terminal of logic control element U4 is connected with voltage detection unit 20, logic control member
The output end of part U4 is connect with switch unit 40.
Preferably as a kind of implementation of the utility model embodiment, above-mentioned control unit 30 includes single-chip microcontroller.It needs
It is noted that whether control unit 30 can be fed back by monolithic machine testing current detecting unit 10 and voltage detection unit 20
Abnormal signal, and in current detecting unit 10 and one of them the feedback abnormal signal of voltage detection unit 20, control switch list
Member shutdown.
It is carried out below in conjunction with working principle of the Fig. 4 to automobile power source line protective devices provided by the embodiment of the utility model
It is described in detail:
The electric current that current detecting unit 10 is got from equipment power supply signal generates voltage drop after first resistor,
After operational amplifier U1 amplifies the voltage drop of generation, amplified voltage value is sent to first voltage comparator U2, the
Amplified voltage value is compared by one voltage comparator U2 with the first predeterminated voltage V1, when amplified voltage value is greater than the
When one predeterminated voltage V1, illustrate the size of current of equipment beyond predetermined current range, first voltage comparator U2 can be exported at this time
One current anomaly signal is given to control unit 30, illustratively, when amplified voltage value is greater than the first predeterminated voltage V1,
First voltage comparator U2 exports high level.
The voltage value of 20 detection device of voltage detection unit, and the voltage value of equipment is sent to second voltage comparator U3,
The voltage value of equipment is compared by second voltage comparator U3 with the second predeterminated voltage V2, when the voltage value of equipment is greater than second
When predeterminated voltage V2, illustrate the voltage of equipment beyond predetermined voltage range, at this point, second voltage comparator U2 can export an electricity
Reduce off-flavor regular signal is given to control unit 30, illustratively, when the voltage value of equipment is greater than the second predeterminated voltage V2, second voltage
Comparator U3 exports high level.
The logic control element or single-chip microcontroller of control unit 30 are different in the electric current for receiving the feedback of current detecting unit 10
Regular signal, or the electric voltage exception signal of the defeated feedback of voltage detection unit 20 is being received, or receive electric current inspection simultaneously
When the survey unit 10 current anomaly signal fed back and the electric voltage exception signal of the defeated feedback of voltage detection unit 20, control unit output
Shutdown control signal is with the shutdown of control switch unit 40, so that power circuit disconnects.Illustratively, above-mentioned logic control member
Part is logic nor gate, when first voltage comparator U2 exports high level or second voltage comparator U3 output high level, is patrolled
It collects nor gate and exports low level, at this point, switching tube Q1 is unsatisfactory for turn-on condition, therefore switching tube Q1 is turned off, so that power supply
Route disconnects.
A kind of automobile power source line protective devices provided by the embodiment of the utility model, can by current detecting unit and
Voltage detection unit detects the electric current and voltage of automobile power source route, and feedback current is different when electric current exceeds predetermined current range
Regular signal, voltage exceed predetermined voltage range when feedback voltage abnormal signal, control unit receive current anomaly signal or
Meeting control switch unit shutdown after person's electric voltage exception signal, and then power circuit is disconnected, it protects electronic equipment not to be damaged, passes through
One-way conduction unit can only unilateal conduction, be effectively prevented foreign current damage equipment, improve the safety of power circuit and
It realizes simply, it is at low cost.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, make several equivalent substitute or obvious modifications without departing from the concept of the premise utility, and performance or
Purposes is identical, all shall be regarded as belonging to the utility model scope of patent protection determined by the appended claims.
Claims (10)
1. a kind of automobile power source line protective devices, which is characterized in that the automobile power source line protective devices include:
Current detecting unit is connected with equipment power supply signal, for the electric current of detection device, and in the electric current beyond default electricity
Feedback current abnormal signal when flowing range；
Voltage detection unit is connected between control unit and output interface, and the voltage detection unit is for detection device
Voltage, and the feedback voltage abnormal signal when the voltage exceeds predetermined voltage range；
Control unit is connect with the current detecting unit, the voltage detection unit and switch unit, the control respectively
Unit is used to feed back corresponding control signal according to the testing result of the current detecting unit and the voltage detection unit；
Switch unit is connected with described control unit and the current detecting unit, and the switch unit is used for according to the control
The control signal of unit processed is connected or is turned off；
One-way conduction unit, is connected between switch unit and output interface, and the one-way conduction unit is for one-way conduction electricity
Road prevents foreign current from entering equipment.
2. automobile power source line protective devices according to claim 1, which is characterized in that the current detecting unit packet
It includes: signal amplification unit and comparing unit；
The signal amplification unit, for obtaining corresponding voltage according to the electric current of power supply signal, and by the electricity got
Pressure carries out signal amplification；
The comparing unit is connected with the signal amplification unit, and the comparing unit is used for the amplified voltage value of signal
It is compared with the first predetermined voltage threshold, and when the amplified voltage value of signal is greater than first predetermined voltage threshold,
Feedback current abnormal signal.
3. automobile power source line protective devices according to claim 2, which is characterized in that the signal amplification unit packet
It includes: first resistor and operational amplifier；
The first end of the first resistor is connected with equipment power supply signal, second end and the switch unit phase of the first resistor
Even, the first input end of the operational amplifier is connect with the first end of the first resistor, and the second of the operational amplifier
Input terminal is connect with the second end of the first resistor, and the output end of the operational amplifier is connect with comparing unit.
4. automobile power source line protective devices according to claim 2, which is characterized in that the comparing unit includes first
Voltage comparator；
The first input end of the first voltage comparator is connected with the signal amplification unit, the first voltage comparator
Second input terminal accesses the first predeterminated voltage, and the output end of the first voltage comparator is connected with control unit.
5. automobile power source line protective devices according to claim 1, which is characterized in that the voltage detection unit includes
Second voltage comparator；
The first input end of the second voltage comparator is connected with output interface, the second input of the second voltage comparator
It terminates into the second predeterminated voltage, the output end of the second voltage comparator is connected with control unit.
6. automobile power source line protective devices according to claim 1, which is characterized in that the switch unit includes switch
Pipe；
The controlled end of the switching tube is connected with control unit, and the hot end of the switching tube is connect with current detecting unit,
The cold end of the switching tube is connect with one-way conduction unit.
7. automobile power source line protective devices according to claim 1, which is characterized in that the one-way conduction unit includes
Diode；
The anode of the diode is connected with the switch unit, and the cathode of the diode is connected with output interface.
8. automobile power source line protective devices according to claim 1, which is characterized in that described control unit includes logic
Control element；
First control terminal of the logic control element is connected with the current detecting unit, and the second of the logic control element
Control terminal is connected with the voltage detection unit, and the output end of the logic control element is connect with the switch unit.
9. automobile power source line protective devices according to claim 1, which is characterized in that described control unit includes monolithic
Machine.
10. automobile power source line protective devices according to claim 6, which is characterized in that the switching tube is PMOS tube,
The controlled end of the switching tube is the grid of the PMOS tube, and the hot end of the switching tube is the source electrode of the PMOS tube,
The cold end of the switching tube is the drain electrode of the PMOS tube.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/099282 WO2019041092A1 (en) | 2017-08-28 | 2017-08-28 | Automobile power line protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209730800U true CN209730800U (en) | 2019-12-03 |
Family
ID=65524746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201790000141.0U Active CN209730800U (en) | 2017-08-28 | 2017-08-28 | A kind of automobile power source line protective devices |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209730800U (en) |
| WO (1) | WO2019041092A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7057377B1 (en) * | 2004-12-23 | 2006-06-06 | Ana Semiconductor | Z-state circuit for switching regulators |
| CN200947538Y (en) * | 2006-06-16 | 2007-09-12 | 罗英约 | Leakage protection switch of short circuit detection before switch on |
| CN201134662Y (en) * | 2007-12-27 | 2008-10-15 | 余博贺 | Leakage detecting and protecting device |
| CN105991013B (en) * | 2015-02-06 | 2019-07-12 | 上海东软载波微电子有限公司 | Power-supply system protects circuit |
| CN105790222B (en) * | 2015-12-25 | 2018-09-21 | 华为技术有限公司 | The protective device and method and Switching Power Supply of Switching Power Supply |
| CN205882678U (en) * | 2016-08-02 | 2017-01-11 | 河海大学常州校区 | High -power DCDC converter protection device |
-
2017
- 2017-08-28 WO PCT/CN2017/099282 patent/WO2019041092A1/en active Application Filing
- 2017-08-28 CN CN201790000141.0U patent/CN209730800U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019041092A1 (en) | 2019-03-07 |
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