CN106980037A - Alternating current detection circuit of bidirectional vehicle-mounted charger and electric automobile - Google Patents
Alternating current detection circuit of bidirectional vehicle-mounted charger and electric automobile Download PDFInfo
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- CN106980037A CN106980037A CN201710232522.8A CN201710232522A CN106980037A CN 106980037 A CN106980037 A CN 106980037A CN 201710232522 A CN201710232522 A CN 201710232522A CN 106980037 A CN106980037 A CN 106980037A
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- alternating current
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 230000002457 bidirectional effect Effects 0.000 title abstract 3
- 230000033228 biological regulation Effects 0.000 claims description 32
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 210000004899 c-terminal region Anatomy 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an alternating current detection circuit of a bidirectional vehicle-mounted charger and an electric automobile. Two-way on-vehicle quick-witted alternating current detection circuitry that charges, power drive side circuit includes: a detection circuit and a voltage follower; the detection circuit outputs a detection signal through a detection signal line, the detection signal line is connected to the homodromous input end of the voltage follower, the reverse input end is connected to the output end of the voltage follower, and the output end is connected with a corresponding pin on the connector; the low-voltage control side circuit includes: a sampling signal line connected to the corresponding pin; and one end of the pull-down resistor is connected with the sampling signal line, and the other end of the pull-down resistor is grounded. The alternating current detection circuit of the bidirectional vehicle-mounted charger solves the problem that software and hardware are mistakenly protected and shut down due to the fact that after pins of a connector are suspended or disconnected, a power drive board circuit of a sampled object of alternating current and a low-voltage control board circuit of the sampled object of alternating current can have suspended voltage. The detection circuit can enhance the anti-interference capability and improve the sampling precision.
Description
Technical field
Field, more particularly to a kind of two-way Vehicular charger alternating current detection circuit are manufactured the present invention relates to electric automobile
And electric automobile.
Background technology
In two-way Vehicular charger circuit design, all kinds of input (output) electric currents in detection and upper telegraph circuit are typically required to
(voltage) value, with observation circuit working condition, protection circuit device, relevant device and personal safety etc..
In power drive and low voltage control separate the two-way Vehicular charger circuit design framework of making sheet, low voltage control plate
It is generally responsible for the functions, power driving device such as vehicle communication interaction, power driving circuit control and signal sampling, overcurrent protection
Connected with low voltage control plate by all kinds of connectors.Power driving device is using circuit arrangement sampled current signals such as precision resistances
When, exported by connector pinout and give low voltage control plate sampled signal all the way, the signal passes through low voltage control plate process circuit again
Enter the sampling that Chip Microcomputer A/D C-terminal mouthful completes power driving device correlated current signal afterwards.
In the prior art, it is the problem of alternating current sample circuit, when connector connection is good, adjusts resistance
Also function as pull down resistor, suspended voltage do not had into low voltage control plate Chip Microcomputer A/D C-terminal mouthful, and when connector pin is hanging or
When breaking, low voltage control plate end pin can have suspended voltage, if single-chip microcomputer is collected more than after threshold voltage signal, can cause
Pipe is closed in protection to software and hardware by mistake.
The content of the invention
In order to overcome the connector pin of alternating current sample circuit in the prior art because hanging or disconnection has suspended voltage
Software and hardware is caused to protect the technical problem for closing pipe by mistake, the invention provides a kind of two-way Vehicular charger alternating current detection circuit
And electric automobile.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：
The invention provides a kind of two-way Vehicular charger alternating current detection circuit, including the work(connected by connector
Rate drive-side circuit and low voltage control lateral circuit,
The power drive lateral circuit includes：Detection circuit and voltage follower for acquisition testing signal；
The detection circuit exports the detection signal by a signal lines, and the signal lines are connected to described
The input in the same direction of voltage follower, the reverse input end of the voltage follower is connected to the output of the voltage follower
End, the output end of the voltage follower is connected with the corresponding pin on the connector；
The low voltage control lateral circuit includes：Sampled signal line, is connected to the correspondence pin；
Pull down resistor, the pull down resistor one terminates the sampled signal line, other end ground connection.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the power drive lateral circuit
Including：
The transformer of primary coil and secondary coil composition；
The secondary coil is connected with rectifier bridge；
The rectifier bridge is connected by signal lines with the detection circuit；
The detection circuit includes：Multiple regulation resistance, the first filter capacitor and the second filter capacitor are connected respectively.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the low voltage control lateral circuit
Also include：
3rd filter capacitor, connects with the pull down resistor；
Current-limiting resistance, it is in parallel with the pull down resistor.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the rectifier bridge, multiple regulations
Resistance, the first filter capacitor and the second filter capacitor are connected to ground by ground wire respectively.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the low voltage control lateral circuit
Also include：
Protection diode, is connected with the current-limiting resistance.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the regulation resistance includes：
First regulation resistance, the second regulation resistance, the 3rd regulation resistance and the 4th regulation resistance；
The first regulation resistance, the second regulation resistance, the 3rd regulation resistance and the 4th regulation resistance
One end be connected with the signal lines, the other end is connected with the ground wire.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the rectifier bridge includes first
Commutation diode, the second commutation diode, the 3rd commutation diode and the 4th commutation diode；
First commutation diode and the 3rd commutation diode are connected with the ground wire, second rectification two
Pole pipe and the 4th commutation diode are connected with the signal lines.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the voltage follower is also wrapped
Include power end and earth terminal.
Furthermore, it is understood that in described two-way Vehicular charger alternating current detection circuit, the one of the protection diode
End connection 3.3V power supplys, other end ground connection.
Present invention also offers a kind of electric automobile, including two-way Vehicular charger alternating current detection electricity as described above
Road.
The beneficial effects of the invention are as follows：The two-way Vehicular charger alternating current detection circuit of the present invention, solves alternation
Electric current is sampled target power driving plate circuit and sample objects low voltage control plate circuit because connector pin is hanging or disconnected
After opening, might have suspended voltage causes software and hardware to protect the problem of closing pipe by mistake.The detection circuit simultaneously can strengthen antijamming capability,
Lift sampling precision.
Brief description of the drawings
Fig. 1 represents the catenation principle figure of two-way Vehicular charger alternating current detection circuit in the embodiment of the present invention.
Embodiment
It is right below in conjunction with the accompanying drawings and the specific embodiments to make the object, technical solutions and advantages of the present invention clearer
The present invention is described in detail.
Shown in reference picture 1, the invention provides a kind of two-way Vehicular charger alternating current detection circuit, including by even
The power drive lateral circuit 1 and low voltage control lateral circuit 3 of device connection are connect, power drive lateral circuit 1 includes：For acquisition testing letter
Number detection circuit and voltage follower U1；Detection circuit exports the detection signal, detection letter by a signal lines 10
Number line 10 is connected to voltage follower U1 input in the same direction, and voltage follower U1 reverse input end is connected to voltage follower
U1 output end, voltage follower U1 output end is connected with the corresponding pin on connector；Low voltage control lateral circuit 2 includes：
Sampled signal line 30, is connected to the correspondence pin；Pull down resistor R5, a termination sampled signal line 30, other end ground connection.
Furthermore, it is understood that power drive lateral circuit 1 includes：The transformer T1 of primary coil and secondary coil composition；Secondary coil connects
It is connected to rectifier bridge；Rectifier bridge is connected by signal lines 10 with detection circuit.Detection circuit includes：Multiple regulation resistance, the
One filter capacitor C1 and the second filter capacitor C2 are connected with signal lines 10 respectively.
Specifically, the transformer T1 of primary coil and secondary coil composition；Secondary coil is connected with rectifier bridge；Rectifier bridge passes through inspection
Signal wire 10 is surveyed to be connected respectively with multiple regulation resistance, the first filter capacitor C1 and the second filter capacitor C2；Voltage follower U1,
Its input in the same direction is connected with signal lines 10；Voltage follower U1 output end is believed with the sampling of low voltage control lateral circuit 2
Number line 30 is connected.Low voltage control lateral circuit includes：Pull down resistor R5, is connected with the sampled signal line 30 of low voltage control lateral circuit；
3rd filter capacitor C3, connects with pull down resistor R5；Current-limiting resistance R6, it is in parallel with pull down resistor R5.
Specifically, in two-way Vehicular charger alternating current detection circuit of the invention, voltage follower U1 can be every
From power drive lateral circuit 1 and low voltage control lateral circuit 2.Pull down resistor R5 is arranged in low voltage control lateral circuit 2, will be pulled down
Resistance R5 is used as pull down resistor polarity.The program can solve connector pin very well because hanging or disconnection has suspended voltage
Cause software and hardware to protect the problem of closing pipe by mistake, while can play anti-interference, strengthen the effect of sampling precision.
Furthermore, it is understood that the rectifier bridge, multiple regulation resistance, the first filter capacitor C1 and the second filter capacitor C2 difference
It is connected by ground wire 20 with ground (GND).
Wherein, regulation resistance includes：First regulation resistance R1, the second regulation resistance R2, the 3rd regulation resistance R3 and the 4th
Adjust resistance R4；The first regulation resistance R1, the second regulation resistance R2, the 3rd regulation resistance R3 and the described 4th
Regulation resistance R4 one end is connected with the signal lines 10, and the other end is connected with the ground wire 20.
In addition, the rectifier bridge includes the first commutation diode D1, the second commutation diode D2, the 3rd commutation diode
D11 and the 4th commutation diode D22；
Rectifier bridge is attached with ground wire 20 and signal lines 10.First commutation diode D1 and described 3rd whole
Stream diode D11 is connected with the ground wire 20, the second commutation diode D2 and the 4th commutation diode D22 and institute
Signal lines 10 are stated to connect.
Furthermore, it is understood that voltage follower U1 is connected in signal lines 10.Voltage follower U1 input in the same direction
It is connected with signal lines 10, is used as voltage follower U1 input.Voltage follower U1 output end and voltage follower U1
Reverse input end connection, be used as voltage follower U1 feedback regulation.
In addition, the normal operation in order to ensure voltage follower U1, voltage follower U1 also includes power end and earth terminal,
Respectively with power supply VCC and be connected.
Wherein, the distinguishing feature of voltage follower is exactly that input impedance is high, and output impedance is low.In general, input resistance
It is anti-to reach several megohms, and output impedance is low, it is generally only several ohm, even lower.
In circuit, voltage follower typically does buffer stage (buffer) and isolation level.Because, the output of voltage amplifier
Impedance is typically higher, generally at several kilo-ohms to tens kilo-ohms, if the input impedance of rear class is smaller, then signal just has
Suitable partition losses are in the output resistance of prime.During this time, it is necessary to which voltage follower enters row buffering.Play and hold
Effect under opening.Voltage follower can also improve input impedance, can significantly reduce the size of input capacitance, high for application
The electric capacity of quality provides guarantee.
The approximate input voltage amplitude of voltage isolator output voltage, and be in high-impedance state to front stage circuits, to late-class circuit
In low resistive state, thus " isolation " effect is played to front stage circuit.
Voltage follower makees intergrade, with the influence between " isolation " front stage, now referred to as buffer stage.General principle
Or utilize its input impedance height and the low feature of output impedance.
The input impedance of voltage follower is high, the low feature of output impedance, can extremely go to understand, when input impedance very
Gao Shi, is equivalent to open a way to front stage circuits；When output impedance is very low, a constant pressure source is equivalent to late-class circuit, i.e.,
Output voltage is not by late-class circuit impedance influences.One to front stage circuits equivalent to open circuit, output voltage and not by rear class impedance
The circuit of influence possesses buffer action certainly, makes to be independent of each other between forward and backward level circuit.
The setting form of low voltage control lateral circuit 2 is described below.Low voltage control lateral circuit includes：Pull down resistor R5 is and low
The sampled signal line 30 of voltage-controlled lateral circuit processed 2 is connected；3rd filter capacitor C3, connects with pull down resistor R5；Current-limiting resistance R6, with
Pull down resistor R5 is in parallel.Low voltage control lateral circuit 2 also includes protection diode D3, is connected with current-limiting resistance R6.Protection diode
D3 one end connection 3.3V power supplys, other end ground connection.
By increasing voltage follower U1, isolation power drive lateral circuit 1 and low voltage control side in power drive lateral circuit 1
Circuit 2.And pull down resistor R5 is changed to pull down resistor by low voltage control lateral circuit 2.The program can solve connector very well and draw
Pin has suspended voltage to cause software and hardware to protect the problem of closing pipe by mistake because of hanging or disconnection, while can play anti-interference, enhancing is adopted
The effect of sample precision.
In order to meet the reliability of whole circuit design, and maintenance, installation and the convenience debugged, by power drive side
Connected between the signal lines 10 and low voltage control lateral circuit 2 of circuit 1 by plug connector.Thus facilitate and carry out two circuits
Between dismounting.
The model of not specified chip and all kinds of components, quantity, parameter in the embodiment of this explanation, circuit function are realized
There may be various deformation.
Present invention also offers a kind of electric automobile, including two-way Vehicular charger alternating current detection electricity as described above
Road.
It should be noted that the electric automobile is to include above-mentioned two-way Vehicular charger alternating current to detect the electronic of circuit
Automobile, the implementation of above-mentioned two-way Vehicular charger alternating current detection circuit embodiments is equally applicable to the electric automobile
In embodiment, identical technique effect can be also reached, be will not be repeated here.
The key point of the present invention is to solve in electric automobile, and power drive and low voltage control separate the two-way vehicle-mounted of making sheet
In circuit for charging machine design architecture, alternating current is sampled target power driving plate circuit and sample objects low voltage control plate circuit
Because connector pin is vacantly or after disconnection, might have suspended voltage causes software and hardware to protect the problem of closing pipe by mistake.
In the prior art, the design of two-way Vehicular charger alternating current sample circuit can only ensure that connector connection is good
When be avoided that the influence of suspended voltage.Two-way Vehicular charger alternating current detection circuit in the electric automobile of the present invention, energy
It is more efficient to avoid software and hardware maloperation caused by suspended voltage, and strengthen anti-interference lifting sampling precision.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
Between the difference of other embodiment, each embodiment identical similar part mutually referring to.
In the description of the invention, it is to be understood that term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness ",
Indicating position or the position such as " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer "
It is, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplify description to put relation, rather than
Indicate or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration and operation, therefore can not
It is interpreted as limitation of the present invention.In the description of the invention, unless otherwise indicated, " multiple " be meant that two or two with
On.
Above-described is the preferred embodiment of the present invention, it should be pointed out that come for the ordinary person of the art
Say, some improvements and modifications can also be made under the premise of principle of the present invention is not departed from, and these improvements and modifications also exist
In protection scope of the present invention.
Claims (10)
1. a kind of two-way Vehicular charger alternating current detection circuit, including the power drive lateral circuit that is connected by connector and
Low voltage control lateral circuit, it is characterised in that
The power drive lateral circuit includes：Detection circuit and voltage follower for acquisition testing signal；
The detection circuit exports the detection signal by a signal lines, and the signal lines are connected to the voltage
The input in the same direction of follower, the reverse input end of the voltage follower is connected to the output end of the voltage follower, institute
The output end of voltage follower is stated to connect with the corresponding pin on the connector；
The low voltage control lateral circuit includes：Sampled signal line, is connected to the correspondence pin；
Pull down resistor, the pull down resistor one terminates the sampled signal line, other end ground connection.
2. two-way Vehicular charger alternating current detection circuit as claimed in claim 1, it is characterised in that the power drive
Lateral circuit includes：
The transformer of primary coil and secondary coil composition；
The secondary coil is connected with rectifier bridge；
The rectifier bridge is connected by signal lines with the detection circuit；
The detection circuit includes：Multiple regulation resistance, the first filter capacitor and the second filter capacitor are believed with the detection respectively
The connection of number line.
3. two-way Vehicular charger alternating current detection circuit as claimed in claim 1, it is characterised in that the low voltage control
Lateral circuit also includes：
3rd filter capacitor, connects with the pull down resistor；
Current-limiting resistance, it is in parallel with the pull down resistor.
4. two-way Vehicular charger alternating current detection circuit according to claim 2, it is characterised in that the rectification
Bridge, multiple regulation resistance, the first filter capacitor and the second filter capacitor are connected to ground by ground wire respectively.
5. two-way Vehicular charger alternating current detection circuit according to claim 3, it is characterised in that the low pressure control
Lateral circuit processed also includes：
Protection diode, is connected with the current-limiting resistance.
6. two-way Vehicular charger alternating current detection circuit according to claim 2, it is characterised in that the regulation electricity
Resistance includes：
First regulation resistance, the second regulation resistance, the 3rd regulation resistance and the 4th regulation resistance；
The first regulation resistance, the second regulation resistance, the 3rd regulation resistance and the described 4th adjust the one of resistance
End is connected with the signal lines, and the other end is connected with the ground wire.
7. two-way Vehicular charger alternating current detection circuit according to claim 2, it is characterised in that the rectifier bridge
Including the first commutation diode, the second commutation diode, the 3rd commutation diode and the 4th commutation diode；
First commutation diode and the 3rd commutation diode are connected with the ground wire, second commutation diode
It is connected with the 4th commutation diode with the signal lines.
8. two-way Vehicular charger alternating current detection circuit according to claim 1, it is characterised in that the voltage with
Also include power end and earth terminal with device.
9. two-way Vehicular charger alternating current detection circuit according to claim 5, it is characterised in that the protection two
One end connection 3.3V power supplys of pole pipe, other end ground connection.
10. a kind of electric automobile, including two-way Vehicular charger alternating current as in one of claimed in any of claims 1 to 9
Detect circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232522.8A CN106980037A (en) | 2017-04-11 | 2017-04-11 | Alternating current detection circuit of bidirectional vehicle-mounted charger and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232522.8A CN106980037A (en) | 2017-04-11 | 2017-04-11 | Alternating current detection circuit of bidirectional vehicle-mounted charger and electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN106980037A true CN106980037A (en) | 2017-07-25 |
Family
ID=59343836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710232522.8A Pending CN106980037A (en) | 2017-04-11 | 2017-04-11 | Alternating current detection circuit of bidirectional vehicle-mounted charger and electric automobile |
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| CN (1) | CN106980037A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966608A (en) * | 2017-12-02 | 2018-04-27 | 上海仪电科学仪器股份有限公司 | A kind of measuring circuit for gathering bi-directional voltage signal |
| CN114646837A (en) * | 2022-05-13 | 2022-06-21 | 湖南恩智测控技术有限公司 | Equipotential body signal measuring circuit, equipotential body signal measuring device and equipotential body signal measuring instrument |
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| CN101997324A (en) * | 2009-08-05 | 2011-03-30 | 通用汽车环球科技运作公司 | Systems and methods for bi-directional energy delivery with galvanic isolation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107966608A (en) * | 2017-12-02 | 2018-04-27 | 上海仪电科学仪器股份有限公司 | A kind of measuring circuit for gathering bi-directional voltage signal |
| CN114646837A (en) * | 2022-05-13 | 2022-06-21 | 湖南恩智测控技术有限公司 | Equipotential body signal measuring circuit, equipotential body signal measuring device and equipotential body signal measuring instrument |
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