CN206364550U - A kind of car emergency power supply of output voltage analog detection - Google Patents
A kind of car emergency power supply of output voltage analog detection Download PDFInfo
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- CN206364550U CN206364550U CN201621483728.5U CN201621483728U CN206364550U CN 206364550 U CN206364550 U CN 206364550U CN 201621483728 U CN201621483728 U CN 201621483728U CN 206364550 U CN206364550 U CN 206364550U
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Abstract
The utility model provides a kind of car emergency power supply of output voltage analog detection, including power supply circuit, output interface and the controlling switch for controlling power supply circuit to work, the external loading for being coupled to output interface is powered when power supply circuit works, the output current to car emergency power supply carries out analog sampling at regular intervals, voltage sample module, including a voltage sample holding circuit and a protection switch, the protection switch is coupled between external loading and output interface, in response to the drive signal to disconnect the electrical connection between the external loading and output interface；The voltage sample holding circuit includes an input and output end, the input couples the power supply circuit, the sampled voltage of the magnitude of voltage of the reflection of the output end output one power supply circuit output, Autonomous test is realized by the clock signal of interrupted output, cycle is short, it can be found that the abnormal conditions of output current, remind, prevent load life from receiving influence in time.
Description
Technical field
The utility model is related to car emergency power technique fields, is specifically related to a kind of vapour of output voltage analog detection
Car emergency power supply.
Background technology
Car emergency startup power supply be in order to automobile lead to not because of storage battery not enough power supply complete firing action when, vapour
A kind of aid of car emergency start, it can be directly connected to storage battery and the power supply of offer in short-term, be moved with aiding in completing igniting
Make, it includes input charging circuit, battery, power supply circuit and some output ends, set controlling switch to be used to control to supply
Circuit works, the load supplying of docking on the output when power supply circuit works.
But car emergency power supply has a problem that, due to car emergency power supply long-time without using or other situations
Under, easily there is component aging, or limited by use environment so that exception occurs in its output voltage, and once exports
There is exception in voltage, easily produces influence on load in charging, and this inner case user is difficult to oneself and detected, so
Cause larger inconvenience.
Utility model content
For the above-mentioned problems in the prior art, a kind of car emergency of output voltage analog detection is now aimed to provide
Power supply, to solve the above problems,
Concrete technical scheme is as follows：A kind of car emergency power supply of output voltage analog detection, including power supply circuit, output
Interface and the controlling switch for controlling power supply circuit to work, to being coupled to the outer of output interface during the power supply circuit work
Section load is powered, it is characterised in that also including electric current self-detection circuit, and the electric current self-detection circuit includes
Intermittent driving module, the intermittent driving module continues the second preset time at interval of the first preset time output one
Drive signal, the controlling switch acted in response to the drive signal so that the power supply circuit work；
Voltage sample module, including a voltage sample holding circuit and a protection switch, the protection switch are coupled to outer
Between section load and output interface, in response to the drive signal to disconnect being electrically connected between the external loading and output interface
Connect；The voltage sample holding circuit includes an input and output end, and the input couples the power supply circuit, described defeated
Go out the sampled voltage of the magnitude of voltage of the reflection of the end output one power supply circuit output；
Comparison module, is coupled to the sampling node, when the sampled voltage is more than upper limit reference voltage or less than lower limit
During reference voltage, outputting alarm signal；
Alarm module, is coupled to comparison module, is worked when receiving alarm signal.
Further, the voltage sample holding circuit includes a sampling switch, and the sampling switch is controlled by the drive
Dynamic signal closure, during the sampling switch closure, electricity of being sampled described in the output end formation one in the voltage sample holding circuit
Pressure.
Further, the protection switch is set to controllable silicon, and the controlled terminal of the controllable silicon connects the intermittent driving
Module.
Further, the resistance of the fictitious load is less than 1 ohm.
Further, the comparison module includes upper limit comparing unit and lower limit comparing unit；
The upper limit comparing unit includes upper limit comparator and upper limit reference section, and the upper limit reference section is coupled to the upper limit
The negative input end of comparator, for providing upper limit reference voltage；The positive input terminal of the upper limit comparator is coupled to the sampling
Node, the output end of the upper limit comparator is used to export the alarm signal；
The lower limit comparing unit includes lower limit comparator and lower limit reference section, and the lower limit reference section is coupled to lower limit ratio
Compared with the positive input terminal of device, for providing lower limit reference voltage；The negative input end of the lower limit comparator is coupled to the sampling section
Point, the output end of the lower limit comparator is used to export the alarm signal.
Further, the upper limit reference section includes some reference resistances being arranged in series, the reference resistance coupling
Node provides the upper limit reference voltage.
Further, lower limit reference section includes some reference resistances being arranged in series, the node of the reference resistance coupling
The lower limit reference voltage is provided.
Further, the output end of the lower limit comparator and the upper limit comparator is connected to a diode, two
The negative electrode of the individual diode is connected with each other, the node outputting alarm signal of connection.
Further, the alarm module is set to be controlled by the buzzer or indicator lamp of the alarm signal work.
Further, the intermittent driving module is set to multivibrator.
The good effect of above-mentioned technical proposal is：By in this way, at regular intervals to the defeated of car emergency power supply
Go out voltage and carry out analog sampling, by judging the size of sampled value, so as to judge the size of analog voltage, pass through interrupted output
Clock signal realizes Autonomous test, and the cycle is short, it can be found that the abnormal conditions of output voltage, remind, prevent load life from receiving in time
To influence.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the car emergency power supply of output voltage analog detection of the present utility model；
Fig. 2 is interval drive module circuit diagram in embodiment 1 of the present utility model；
Fig. 3 is interval drive module circuit diagram in embodiment 2 of the present utility model；
Fig. 4 is comparison module of the present utility model and alarm module circuit diagram；
Fig. 5 is the circuit theory schematic diagram of voltage sample holding circuit of the present utility model.
In accompanying drawing：1st, sampling node；100th, power supply circuit；110th, output interface；200th, voltage sample module；300th, interval
Drive module；310th, multivibrator；301st, driver element；320th, the first counter module；330th, the second counter module；
400th, comparison module；410th, upper limit comparing unit；411st, upper limit reference section；412nd, upper limit comparator；420th, lower limit comparing unit；
421st, lower limit reference section；422nd, lower limit comparator；500th, alarm module.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, with
The technical scheme that lower embodiment combination accompanying drawing 1 is provided the utility model to accompanying drawing 4 is specifically addressed, but herein below not as
It is of the present utility model to limit.
With reference to embodiment illustrated in fig. 11, detailed description, a kind of output voltage analog detection are made to circuit theory and annexation
Car emergency power supply, including power supply circuit 100, output interface 110 and for control power supply circuit 100 work control open
Close, as shown in figure 1, controlling switch is arranged on K2 position, can also be arranged between power supply circuit 100 and battery, herein
Do not do and limit to, it is an object of the invention to control the opening and closing of controlling switch, and pass through relay as shown in Figure 2 or Figure 3
Device coil K2 controls its action to realize the output connection relation of control power supply circuit 100, will not be described here, power supply circuit
The external loading for being coupled to output interface 110 is powered during 100 work, in addition to electric current self-detection circuit, electric current Autonomous test electricity
Road includes
Intermittent driving module 300, intermittent driving module 300 at interval of the first preset time output one continue second it is default when
Between drive signal, controlling switch in response to drive signal act so that power supply circuit 100 works；Intermittent driving module 300 is set
Multivibrator 310, and driver element 301 as shown in Figure 2 are set to, many thanks oscillator can be realized by 555 timers,
The oscillating circuit that can also be made up of other elements realizes the output of square wave, and the first preset time and the second preset time can
With by change component parameters realize the output duty cycle of many thanks oscillator and the regulation of bandwidth realize the first preset time and
The configuration of second preset time, it is preferred that the first preset time be more than 24 hours, and the second preset time be more than 10 seconds, also
It is to say, the state of the emergency power supply of detection in each 24 hours plays the effect of an alarm, and the second preset time is namely
The duration of detection, only with offer enough sampling times, that is to say, that each first preset time can export a high point
It is flat, realize and sample as drive signal.
Voltage sample module 200, including a voltage sample holding circuit and a protection switch K1, the protection switch K1 couplings
It is connected between external loading and output interface 110, in response to the drive signal to disconnect the external loading and output interface
Electrical connection between 110；The voltage sample holding circuit includes an input and output end, and the input coupling is described to supply
Circuit 100, the sampled voltage for the magnitude of voltage that the reflection power supply circuit 100 of output end output one is exported；Voltage sample
Holding circuit realizes the acquisition of sampled voltage as shown in figure 5, acted by sampling switch K2, and during K2 closures, is now tested electricity
Pressure is just formed in the output end of amplifier, even and if discharge K2 buttons, although tested voltage disappears, and output end can still keep defeated
Go out magnitude of voltage, now circuit is in anti-phase magnifying state, and gain is 1, therefore C3 high side is sample voltage value, when adopting again
During collection, moment is discharged by C2, forms discharge loop, it is ensured that electric discharge is normal, and amplifier elects LM357 as, due to LM357 impedance compared with
It is high, it is possible to ensure that reading is accurate, and the output end of comparator formation sampling node 1.
As shown in figure 4, comparison module 400, can equally be controlled by drive signal work, play the effect for saving energy consumption,
Sampling node 1 is coupled to, when sampled voltage is more than upper limit reference voltage or less than lower limit reference voltage, outputting alarm signal；
Comparison module 400 includes upper limit comparing unit 410 and lower limit comparing unit 420；Upper limit comparing unit 410 includes the upper limit and compared
Device 412 and upper limit reference section 411, upper limit reference section 411 is coupled to the negative input end of upper limit comparator 412, for providing the upper limit
Reference voltage；The positive input terminal of upper limit comparator 412 is coupled to sampling node 1, and the output end of upper limit comparator 412 is used to export
Alarm signal；Lower limit comparing unit 420 includes lower limit comparator 422 and lower limit reference section 421, and lower limit reference section 421 is coupled to
The positive input terminal of lower limit comparator 422, for providing lower limit reference voltage；The negative input end of lower limit comparator 422, which is coupled to, to be adopted
Sample node 1, the output end of lower limit comparator 422 is used for outputting alarm signal.Upper limit reference section 411 includes some be arranged in series
Reference resistance, the node of reference resistance coupling provides upper limit reference voltage.Lower limit reference section 421 includes some bases being arranged in series
Quasi- resistance, the node of reference resistance coupling provides lower limit reference voltage, and reference resistance can be set as shown in R11-14 in Fig. 4
For adjustable resistance with adjust alarm signal output sensitivity.The output end difference of lower limit comparator 422 and upper limit comparator 412
Be connected with a diode, the negative electrode of two diodes is connected with each other, the node outputting alarm signal of connection, D1 in such as Fig. 3 and
D2 can play an effect for preventing signals reverse from exporting.
Alarm module 500, is coupled to comparison module 400, is worked when receiving alarm signal.Alarm module 500 is set
To be controlled by the buzzer SP or indicator lamp LED of alarm signal work, its work is controlled by D3, and when working, user is just
Abnormal conditions can be known.
Embodiment 2 with the difference of embodiment 1 as shown in figure 3, be, intermittent driving module 300 passes through the first counter mould
The combination of the counter module 330 of block 320 and second is realized, when the first counter module 320 is preset for configuration register 1 first
Between, the second counter module 330 configures the second preset time by register 2, and the cp ends of counter 2 are Enable Pin, and r ends are multiple
Position end, and the first counter module 320 and the second counter module 330 are respectively arranged with crystal oscillator X1 and X2, the first counter
Overflow the triggering end that end Q is connected to the second counter, that is to say, that each first preset time, the first counter just occurs
Count and overflow, and trigger the second counter works, the output of the second counter continues the high level of the second preset time as driving
Signal, the first rolling counters forward of control and the second counter are resetted simultaneously, i.e. and its D ends working condition end is believed for driving
Number, the effect of intermittent driving can also be realized.
The utility model preferred embodiment is these are only, embodiment of the present utility model and protection is not thereby limited
Scope, to those skilled in the art, should can appreciate that all utilization the utility model specifications and diagramatic content institute
Scheme obtained by the equivalent substitution made and obvious change, should be included in protection domain of the present utility model
It is interior.
Claims (10)
1. a kind of car emergency power supply of output voltage analog detection, including power supply circuit, output interface and for controlling to supply
The controlling switch of circuit work, powers during the power supply circuit work to the external loading for being coupled to output interface, its feature
It is, in addition to electric current self-detection circuit, the electric current self-detection circuit includes
Intermittent driving module, the intermittent driving module exports a drive for continuing the second preset time at interval of the first preset time
Dynamic signal, the controlling switch is acted in response to the drive signal so that the power supply circuit works；
Voltage sample module, including a voltage sample holding circuit and a protection switch, the protection switch are coupled to outside negative
Carry between output interface, in response to the drive signal to disconnect the electrical connection between the external loading and output interface；
The voltage sample holding circuit includes an input and output end, and the input couples the power supply circuit, the output
The sampled voltage of the magnitude of voltage of the reflection of the end output one power supply circuit output；
Comparison module, is coupled to the sampling node, when the sampled voltage is more than upper limit reference voltage or less than lower limit benchmark
During voltage, outputting alarm signal；
Alarm module, is coupled to comparison module, is worked when receiving alarm signal.
2. a kind of car emergency power supply of output voltage analog detection according to claim 1, it is characterised in that the electricity
Sampling hold circuit is pressed to include a sampling switch, the sampling switch is controlled by the drive signal closure, the sampling switch
During closure, sampled voltage described in the output end formation one in the voltage sample holding circuit.
3. a kind of car emergency power supply of output voltage analog detection according to claim 1, it is characterised in that the guarantor
Shield switch is set to controllable silicon, and the controlled terminal of the controllable silicon connects the intermittent driving module.
4. a kind of car emergency power supply of output voltage analog detection according to claim 1, it is characterised in that the mould
The resistance for intending load is less than 1 ohm.
5. a kind of car emergency power supply of output voltage analog detection according to claim 1, it is characterised in that the ratio
Include upper limit comparing unit and lower limit comparing unit compared with module；
The upper limit comparing unit includes upper limit comparator and upper limit reference section, and the upper limit reference section is coupled to the upper limit and compared
The negative input end of device, for providing upper limit reference voltage；The positive input terminal of the upper limit comparator is coupled to the sampling node,
The output end of the upper limit comparator is used to export the alarm signal；
The lower limit comparing unit includes lower limit comparator and lower limit reference section, and the lower limit reference section is coupled to lower limit comparator
Positive input terminal, for providing lower limit reference voltage；The negative input end of the lower limit comparator is coupled to the sampling node, institute
Stating the output end of lower limit comparator is used to export the alarm signal.
6. the car emergency power supply of a kind of output voltage analog detection according to claim 5, it is characterised in that on described
Limiting reference section includes some reference resistances being arranged in series, and the node of the reference resistance coupling provides the upper limit benchmark electricity
Pressure.
7. a kind of car emergency power supply of output voltage analog detection according to claim 5, it is characterised in that lower limit base
Quasi- portion includes some reference resistances being arranged in series, and the node of the reference resistance coupling provides the lower limit reference voltage.
8. the car emergency power supply of a kind of output voltage analog detection according to claim 5, it is characterised in that under described
The output end of limit comparator and the upper limit comparator is connected to a diode, and the negative electrode of two diodes is mutually interconnected
Connect, the node outputting alarm signal of connection.
9. a kind of car emergency power supply of output voltage analog detection according to claim 1, it is characterised in that the announcement
Alert module is set to be controlled by the buzzer or indicator lamp of the alarm signal work.
10. the car emergency power supply of a kind of output voltage analog detection according to claim 1, it is characterised in that described
Intermittent driving module is set to multivibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621483728.5U CN206364550U (en) | 2016-12-30 | 2016-12-30 | A kind of car emergency power supply of output voltage analog detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621483728.5U CN206364550U (en) | 2016-12-30 | 2016-12-30 | A kind of car emergency power supply of output voltage analog detection |
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| CN206364550U true CN206364550U (en) | 2017-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021971A (en) * | 2017-12-12 | 2019-07-16 | 株式会社自动网络技术研究所 | Power supply control apparatus and method for controlling power supply |
-
2016
- 2016-12-30 CN CN201621483728.5U patent/CN206364550U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021971A (en) * | 2017-12-12 | 2019-07-16 | 株式会社自动网络技术研究所 | Power supply control apparatus and method for controlling power supply |
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