CN208520923U - Contact impedance measuring device - Google Patents
Contact impedance measuring device Download PDFInfo
- Publication number
- CN208520923U CN208520923U CN201820673413.XU CN201820673413U CN208520923U CN 208520923 U CN208520923 U CN 208520923U CN 201820673413 U CN201820673413 U CN 201820673413U CN 208520923 U CN208520923 U CN 208520923U
- Authority
- CN
- China
- Prior art keywords
- contact
- conductive part
- electric energy
- electric
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
This application involves a kind of contact impedance measuring devices, it include: baseplug, the baseplug includes that at least two electric energy transmit contact, the at least two electric energy transmission contact is used to matchingly contact at least two electric energy transmission terminals of the power output plug of the electric car power supply unit respectively, wherein one or more of at least two electric energy transmission contact includes the main conductive part being electrically isolated from each other and time conductive part；Electric energy transmission channel, tension measuring circuit, current measurement circuit and signal processor.Signal processor generates the contact impedance between the electric energy transmission terminal of power output plug of the electric car power supply unit and the electric energy transmission contact of the baseplug according to the voltage measurements of the tension measuring circuit and the current measurement result of the current measurement circuit.
Description
Technical field
This application involves electronic measurement techniques, electronic for measuring more particularly, to a kind of contact impedance measuring device
The contact impedance of plug connection between automobile power supply unit and electric car.
Background technique
Electric car is using vehicle power supply as power and with the vehicle of motor driven wheels travel.Due to effect on environment phase
It is smaller to orthodox car, therefore electric car has obtained extensive concern.With the continuous development of the relevant technologies, electric car day
Benefit is universal, has progressed into daily life.
As auxiliary facility, electric car is usually by electric car power supply unit (Electric Vehicle Supply
Equipment, EVSE) power supply, to charge to vehicle power supply.Electric car power supply unit usually have charging pile and with
The charging cable and charging plug of charging pile coupling.In charging, the charging plug and electric car of electric car power supply unit
On charging socket be connected, so that electric energy can be transferred to the vehicle power supply of electric car by charging pile.
Utility model content
In order to measure the electricity transmitted to electric car, electric car power supply unit would generally integrate electric energy meter.However, this
Application inventors have found that the reading and the electricity that is an actually-received of electric vehicle of the electric energy meter integrated on electric car power supply unit
There can be large error.
It is tested by many experiments, inventors have found that the power output plug of the charging cable of electric car power supply unit
(i.e. charging plug) is usually the charging socket of connecting electric automobile in a plug-in manner, and this plug connection has certain contact
Resistance.When transmission electric current is smaller, the voltage drop formed on the contact resistance is smaller, thus will not influence electrical energy measurement substantially
Accuracy.However, electric car power supply unit usually requires to charge with biggish rated current to electric car, the rated current
Usually 50 to 300A.Therefore, big rated current can form significant voltage drop on contact resistance, to influence electric energy meter
The accuracy of amount.In addition, the impedance of the contact resistance between this socket can gradually increase with the increase for using the time, thus
Error is caused to be continuously increased.In addition, biggish contact resistance also adds security risk.
The first purpose of the application is to provide a kind of can measure between electric car power supply unit and electric car
The device of the contact impedance of plug connection.
A kind of contact impedance measuring device is disclosed in the one aspect of the application, for measuring electric car power supply unit
The contact impedance of plug connection between electric car, the contact impedance measuring device includes: baseplug, the baseplug
Contact is transmitted including at least two electric energy, at least two electric energy transmission contact is described electronic for can matchingly contact respectively
At least two electric energy transmission terminals of the power output plug of automobile power supply unit, wherein at least two electric energy transmits contact
One or more of include the main conductive part that is electrically isolated from each other and time conductive part；Electric energy transmission channel, the electric energy transmission are logical
Road has at least two transmission lines, and at least two transmission line respectively transmits at least two electric energy of the baseplug
Contact and load coupled are with from the electric car power supply unit to the load transmission electric energy, wherein at least two transmission
One or more transmission lines in line are respectively coupled to the main conductive part of one or more electric energy transmission contacts；Voltage measurement electricity
Road, the tension measuring circuit are couple to the main conductive part and the secondary conductive part, for measuring the main conductive part and institute
State the voltage difference between time respective voltage of conductive part or the main conductive part and the secondary conductive part；Current measurement circuit, institute
At least one transmission line that current measurement circuit is couple at least two transmission line is stated, for measuring when by described electronic
The electric current at least one transmission line that it is coupled is flowed through when automobile power supply unit is to the load transmission electric energy；And at signal
Device is managed, the tension measuring circuit and the current measurement circuit are couple to, for the electricity according to the tension measuring circuit
Pressure measurement result and the current measurement result of the current measurement circuit generate the power output of the electric car power supply unit
Contact impedance between the electric energy transmission terminal of plug and the electric energy transmission contact of the baseplug.
In some embodiments, the electric car power supply unit is direct current drive automobile power supply unit, described at least two
A electric energy transmission contact includes positive contact and negative contact.
In some embodiments, the electric car power supply unit is single-phase alternating current electrical automobile power supply unit, it is described extremely
Few two electric energy transmission contact includes zero curve contact and phase line contact.
In some embodiments, the electric car power supply unit is three-phase alternating current electric car power supply unit, it is described extremely
Few two electric energy transmission contact includes zero curve contact and three phase line contacts；The current measurement circuit is couple to zero curve and three
The corresponding transmission line of phase line.
In some embodiments, the positive contact includes the main conductive part of positive and positive time conductive part, and the negative
Contact includes the main conductive part of negative and negative time conductive part, wherein the tension measuring circuit includes: first voltage amplifying circuit,
For receiving the voltage difference between the main conductive part of the positive and the positive time conductive part, and generate first voltage signal；
Second voltage amplifying circuit, for receiving the voltage difference between the main conductive part of the negative and the negative time conductive part, and
Generate second voltage signal；And tertiary voltage amplifying circuit, it is leading for receiving the main conductive part of the positive and the negative
Voltage difference between electric portion, and generate tertiary voltage signal.
In some embodiments, the current measurement circuit includes: inductance coil, is couple at least two transmission
A transmission line in line simultaneously generates sample rate current, and the sample rate current is proportional to the electric current for flowing through the transmission line；Sampling
Resistance, for the sample rate current to be converted to sampled voltage；And amplifying circuit, for receiving the sampled voltage and life
At voltage signal.
In some embodiments, the contact impedance measuring device is mutually separated with the load, the contact impedance measurement
Device further include: secondary socket, for being coupled with the electric energy input socket of the load.
In some embodiments, the contact area between the main conductive part and the electric energy transmission terminal is greater than described time
Contact area between conductive part and the electric energy transmission terminal.
In some embodiments, at least part of the main conductive part has the shape of hollow cylindrical, in institute
It states when the baseplug of contact impedance measuring device is coupled with the electric car power supply unit around corresponding electric energy transmission terminal.
In some embodiments, the contact impedance measuring device is integrated with the load, and the load is used for
Simulate the operation of the battery of the electric car.
In some embodiments, each electric energy transmission contact in at least two electric energy transmission contact includes mutual
The main conductive part and time conductive part being electrically isolated, and each transmission line at least two transmission line is both coupled to an electricity
The main conductive part of contact can be transmitted.
In some embodiments, the positive contact includes the main conductive part of positive and positive time conductive part, and the negative
Contact includes the main conductive part of negative and negative time conductive part；At least part of the main conductive part of positive and the negative are leading
At least part in electric portion have hollow cylindrical shape, in the contact impedance measuring device baseplug with it is described
Around corresponding electric energy transmission terminal when electric car power supply unit couples；Wherein the tension measuring circuit includes: the first electricity
Amplifying circuit is pressed, for receiving the voltage difference between the main conductive part of the positive and the positive time conductive part, and generates the
One voltage signal；Second voltage amplifying circuit, for receiving between the main conductive part of the negative and the negative time conductive part
Voltage difference, and generate second voltage signal；And tertiary voltage amplifying circuit, for receiving the main conductive part of the positive and institute
The voltage difference between the main conductive part of negative is stated, and generates tertiary voltage signal；The current measurement circuit includes: inductor wire
Circle, a transmission line being couple at least two transmission line simultaneously generate sample rate current, the sample rate current with flow through
The electric current of the transmission line is proportional；Sampling resistor, for the sample rate current to be converted to sampled voltage；And amplification electricity
Road, for receiving the sampled voltage and generating voltage signal.
The above are the general introductions of the application, may there is the case where simplification, summary and omission details, therefore those skilled in the art
Member is it should be appreciated that the part is only Illustrative, and is not intended to restriction the application range in any way.This general introduction portion
Point be both not intended to determine the key features or essential features of claimed subject, nor be intended as determination it is claimed
The supplementary means of the range of theme.
Detailed description of the invention
By following description and appended claims and in conjunction with attached drawing, it will be more fully clearly understood that this
Apply for the above and other feature of content.It is appreciated that these attached drawings depict only several embodiments of teachings herein, because
This is not considered as the restriction to teachings herein range.By using attached drawing, teachings herein will obtain definitely and
It explains in detail.
Fig. 1 shows the contact impedance measuring device 100 according to the application one embodiment；
Fig. 2 shows an examples of the tension measuring circuit of contact impedance measuring device 100 shown in FIG. 1；
Fig. 3 shows an example of the current measurement circuit of contact impedance measuring device 100 shown in FIG. 1.
Specific embodiment
In the following detailed description, with reference to the part thereof of attached drawing of composition.In the accompanying drawings, the usual table of similar symbol
Show similar component part, unless otherwise indicated by context.Illustrative reality described in detailed description, drawings and claims
The mode of applying is not intended to limit.It, can be using other implementations without departing from the spirit or scope of the theme of the application
Mode, and other variations can be made.It is appreciated that can describing to generality in the application, diagram is said in the accompanying drawings
The various aspects of bright teachings herein carry out a variety of differently composed configurations, replacement, combination, design, and all these all bright
Really constitute a part of teachings herein.
Fig. 1 shows the contact impedance measuring device 100 according to the application one embodiment.In some embodiments, should
Contact impedance measuring device 100 is used to measure the contact resistance of the plug connection between electric car power supply unit and electric car
It is anti-.
As shown in Figure 1, contact impedance measuring device 100 includes baseplug, which transmits including at least two electric energy
Contact, such as electric energy transmit contact 102a and 102b.The baseplug is used for the power output of connecting electric automobile power supply unit 10
Plug so that electric energy can be transferred to contact impedance measuring device 100 by electric car power supply unit 10, and passes through in turn
Load 20 is transferred to by the contact impedance measuring device 100.Load 20 is electric car, power battery pack, electronic load, resistance
Load, or can be the load of other simulation batteries of electric automobile operations, such as programmable load etc..In other words, 20 are loaded
Electric car power supply unit 10 can be enabled to power via contact impedance measuring device 100, connected just as electric car
It connects on electric car power supply unit 10.In this way, inserting between electric car power supply unit 10 and contact impedance measuring device 100
It connects in succession and substantially accurately simulates the plug connection of electric car power supply unit 10 Yu electric car.When electric car power supply is set
Standby 10 with contact impedance measuring device 100 when connecting, at least two in the power output plug of electric car power supply unit 10
Electric energy transmission terminal, such as electric energy transmission terminal 12a and 12b are mutually conductively contacted with electric energy transmission contact 102a and 102b.
It is appreciated that in order to realize that the conductive contact, each electric energy transmission contact can have and the matched shape of electric energy transmission terminal.
For example, electric energy transmission contact may be constructed such that hollow cylindrical, internal diameter are substantially identical as the outer diameter of electric energy transmission terminal.
In order to which electric energy is transferred to load 20, contact impedance measuring device 100 further includes electric energy transmission channel comprising extremely
Few two transmission lines, such as transmission line 104a and 104b.Wherein, an electric energy is transmitted contact and load 20 by every transmission line
Corresponding power line is connected, to transmit electric energy from electric car power supply unit 10 to load 20.It is appreciated that in some embodiments
In, it especially loads 20 and is not integrated in the embodiment of contact impedance measuring device 100, contact impedance measuring device 100 may be used also
To include the secondary socket (not shown) for being connected with the electric energy input socket of load 20.Correspondingly, which can
To be arranged on the most downstream of electric energy transmission channel.In some embodiments, load 20 can also be with contact impedance measuring device
100 integrate.
Contact 102a and 102b are transmitted for electric energy, can have the main conductive part P being electrically isolated from each other and time conductive part
S.Wherein, the main conductive part P of electric energy transmission contact 102a is connected with transmission line 104a, and electric energy transmits the main conductive part of contact 102b
P is connected with transmission line 104b；And the secondary conductive part S of electric energy transmission contact 102a is not connected with transmission line 104a, and electric energy passes
The secondary conductive part S of defeated contact 102b is not also connected with transmission line 104b.In this way, being passed from electric car power supply unit 10 to load 20
Transmission of electricity can electric current flow through main conductive part P and without flow through secondary conductive part S.
Contact impedance measuring device 100 further includes tension measuring circuit 106, be couple to electric energy transmission contact 102a and
The main conductive part P of 102b and time conductive part S, for measuring in the respective voltage in these parts or these conductive parts at least
Voltage difference between a part.In some embodiments, tension measuring circuit 106 can use circuit as shown in Figure 3, this will
It is described further below.
Contact impedance device 100 further includes current measurement circuit 108, at least one be couple at least two transmission lines
A transmission line.In the embodiment shown in fig. 1, current measurement circuit 108 is coupled to transmission line 104b.Current measurement circuit
108 flow through the electricity for the transmission line that it is coupled for measuring when transmitting electric energy to load 20 from electric car power supply unit 10
Stream.In some embodiments, current measurement circuit 108 can use circuit as shown in Figure 2, this hereinafter will further be situated between
It continues.
In addition, contact impedance device 100 further includes signal processor 110, it is couple to tension measuring circuit 106 and electric current
Measuring circuit 108, for according to the voltage measurements of tension measuring circuit 106 and the current measurement of current measurement circuit 108
As a result generate electric car power supply unit power output plug electric energy transmission terminal and baseplug electric energy transmission contact it
Between contact impedance.
Specifically, just it has been observed that supply current is basic when transmitting electric energy to load 20 from electric car power supply unit 10
On be transferred in load 20 via the main conductive part P of electric energy transmission contact completely, and be not passed through time conductive part S.In such case
Under, due to existing contact impedance between electric energy transmission terminal and electric energy transmission contact, supply current can be on the contact impedance
Generate apparent voltage drop.For example, 50 amperes of supply current can generate the voltage of 2.5V for the contact impedance of 50 milliohms
Drop, so that the voltage on the main conductive part that tension measuring circuit 106 measures differs markedly from electric car power supply unit
Voltage at the electric energy transmission terminal of power output plug.
On the other hand, since secondary conductive part S is not connected with transmission line, thus supply current will not flow through time conductive part
S.Further, since tension measuring circuit 106 is configured to have very big input impedance, therefore flow through time electricity of conductive part S
Stream is very small, can ignore substantially.In this case, the contact impedance between electric energy transmission terminal and secondary conductive part S will not
Apparent voltage drop is generated because of electric current, because of voltage and the basic phase of voltage of corresponding electric energy transmission terminal on this conductive part S
Deng.
As can be seen that the voltage difference between the main conductive part P and secondary conductive part S of electric energy transmission contact is equal to because of supply current
The caused voltage drop on contact impedance, and current measurement circuit 108 can measure to obtain the supply current for flowing through transmission line (biography
Defeated line 104a and 104b supply current having the same).Therefore, it is based on Ohm's law, by the leading of same electric energy transmission contact
The voltage difference measured between electric portion P and secondary conductive part S divided by supply current, can be obtained the electric energy transmission contact with it is corresponding
Electric energy transmission terminal between contact impedance.The calculation processing can be executed by signal processor 110.
It is appreciated that the electric energy of the contact impedance measuring device 100 transmits one in contact according to the difference of concrete application
It is a or it is multiple can have main conductive part and time conductive part, to carry out the measurement of contact impedance respectively.Preferably, contact impedance is surveyed
Each electric energy transmission contact of amount device 100 can have main conductive part and time conductive part, to supply for measuring electric car
The electric energy transmission corresponding with the electric energy input socket of electric car of each electric energy transmission terminal of the power output plug of electric equipment
Contact impedance between contact.
In some embodiments, electric car power supply unit is direct current drive automobile power supply unit, with positive electric energy
Output terminal and negative power output terminal.Correspondingly, at least two electric energy transmission contact of contact impedance measuring device 100 can
To include positive contact and negative contact.Wherein, positive contact includes the main conductive part of positive and positive time conductive part, and negative touches
Head includes the main conductive part of negative and negative time conductive part.Since positive power output terminal and negative power output terminal are corresponding
Two transmission lines electric current having the same, under this configuration, current measurement circuit can be connected only to a transmission line.
In some embodiments, electric car power supply unit is single-phase alternating current electrical automobile power supply unit, has one
Phase line power output terminal and a zero curve power output terminal.Correspondingly, at least two electricity of contact impedance measuring device 100
It may include zero curve contact and phase line contact that contact, which can be transmitted, and each contact may include main conductive part and time conductive part.
Due to two transmission lines phase lines and zero curve electric current having the same, under this configuration, current measurement circuit can be connected only to
One transmission line.
In some embodiments, electric car power supply unit is three-phase alternating current electric car power supply unit, and there are three tools
Phase line power output terminal and a zero curve power output terminal.Correspondingly, at least two electricity of contact impedance measuring device 100
It may include zero curve contact and three phase line contacts that contact, which can be transmitted, and each contact may include main conductive part and time conduction
Portion.Since three phase lines and a zero curve may have different electric currents, under this configuration, current measurement circuit be can connect
To this four transmission lines, and the electric current for measuring obtained each transmission line is passed for corresponding to power output terminal and electric energy
The calculating of contact resistance between defeated contact.
It is appreciated that the contact impedance measuring device of the application can measure the electric car power supply unit of various standards
Charging plug, including but not limited to such as GB/T 20234.1-2015, GB/T 20234.2-2015, GB/T 20234.3-
Charging plug specified in 2015.
Fig. 2 shows the current measurement circuits 200 according to one embodiment of the application, can be used as shown in Fig. 1
One example of current measurement circuit 108.
As shown in Fig. 2, current measurement circuit 200 includes inductance coil 201, sampling resistor R0 and amplifying circuit 203.This
Outside, current measurement circuit further includes power supply 202 and analog-digital converter (ADC) 204.Inductance coil 201 is coupled at least two
One or more transmission lines in transmission line make transmission line pass through inductance coil 201, so that inductance coil 201 can be with induced flow
The electric current of transmission line is crossed, and generates the sample rate current that the electric current of transmission line is flowed through in instruction.What the sample rate current and transmission line flowed through
It is proportional by side electric current.Power supply 202 is used to power to inductance coil 201.Sampling resistor R0 is adopted for being converted to sample rate current
Sample voltage.Amplifying circuit 203 can receive sampled voltage, and be amplified, to generate voltage signal.The voltage signal
The amplification level of the requirement of ADC 204 can be met to guarantee the good working performance of ADC 204.ADC 204, which can receive, to be put
The analog voltage signal that big circuit 203 generates, is converted to digital signal for the analog voltage signal and exports.The digital signal can
To be output to signal processor (not shown) for further handling.In some embodiments, the number of voltage
Signal can also with or be output to display equipment (not shown) to show the supply current measured to user.
It will be appreciated by those skilled in the art that the DC current or friendship in inductive power supply line can also be carried out using various devices
Galvanic electricity stream is to realize current measurement circuit, such as hall effect sensor, resistive current shunt device and Zero flux electric current
The devices such as mutual inductor, the application are without limitation.
Fig. 3 shows the tension measuring circuit 300 according to one embodiment of the application, can be used as shown in Fig. 1
One example of current measurement circuit 106.The tension measuring circuit 300 can measure such as positive contact and negative contact and wrap
Include the baseplug of main conductive part and time conductive part.
As shown in figure 3, tension measuring circuit 300 includes:
First voltage amplifying circuit 302, for receiving between the main conductive part V1 of the positive and positive time conductive part V2
Voltage difference, and generate first voltage signal；
Second voltage amplifying circuit 304, for receiving the voltage between the main conductive part GND of negative and negative time conductive part V3
Difference, and generate second voltage signal；And
Tertiary voltage amplifying circuit 306, for receiving the voltage between the main conductive part V1 of positive and the main conductive part GND of negative
Difference, and generate tertiary voltage signal.
Wherein, each voltage amplifier circuit may each comprise an ADC so that the voltage signal of simulation is converted to digital letter
Number, and be supplied to signal processor and handled.
As can be seen that amplifying electricity for the first voltage for being couple to positive time conductive part V2 and negative time conductive part V3
Road 302 and second voltage amplifying circuit 304, with biggish input impedance, thus can be electric to avoid biggish input is generated
Stream influences the voltage measurement to power output terminal.Meanwhile first voltage amplifying circuit 302 and second voltage amplifying circuit
304 detect and the voltage difference amplified reflects contact impedance between positive terminal and positive contact and negative terminal and negative respectively
Voltage drop caused by contact impedance between phase contact, thus it is convenient for the subsequent processing of signal processor.
It should be noted that above-mentioned tension measuring circuit 300 it is merely exemplary show can use voltage measurement electricity
The structure on road also carries out the change of circuit structure in practical applications as needed.
In some embodiments, the contact area between main conductive part and electric energy transmission terminal is greater than time conductive part and electric energy
Contact area between transmission terminal.In this way, secondary conductive part not substantially affects between main conductive part and electric energy transmission terminal
Contact.
In some embodiments, at least part of main conductive part has the shape of hollow cylindrical, for connecing described
The baseplug for touching impedance measurement device is passed with when the coupling of the power output plug of electric car power supply unit around corresponding electric energy
Output terminals.In some embodiments, secondary conductive part can take up a part of side wall of hollow cylindrical, but with main conductive part electricity every
From.
In practical applications, it by using the contact impedance measuring device of the application, can measure to obtain electric car confession
The contact impedance of plug connection between electric equipment and electric car.In this way, when carrying out electrical energy measurement, which can be with
It is taken into account, to eliminate electric energy metering error caused by contact impedance.In addition, in some cases, contact impedance measurement
Device can monitor the variation of contact impedance, when contact impedance increases above certain threshold value, it means that electric car supplies
Plug connection aging between electric equipment and electric car needs replacing the power output plug of electric car power supply unit.This
Effectively reduce security risk.
It should be noted that although being referred to several modules or submodule of contact impedance measuring device in the above detailed description
Block, but this division is only exemplary rather than enforceable.In fact, according to an embodiment of the present application, above description
The feature and function of two or more modules can be embodied in a module.Conversely, an above-described module
Feature and function can be to be embodied by multiple modules with further division.
The those skilled in the art of those the art can pass through research specification, disclosure and attached drawing and appended
Claims, understand and implement other changes to the embodiment of disclosure.In the claims, word " comprising " is not arranged
Except other elements and step, and wording " one ", "one" be not excluded for plural number.In the practical application of the application, one zero
The function of cited multiple technical characteristics in the possible perform claim requirement of part.Any appended drawing reference in claim should not manage
Solution is the limitation to range.
Claims (11)
1. a kind of contact impedance measuring device, for measuring the plug connection between electric car power supply unit and electric car
Contact impedance, the contact impedance measuring device include:
Baseplug, the baseplug include that at least two electric energy transmit contact, and at least two electric energy transmission contact is for dividing
At least two electric energy transmission terminals of the power output plug of the electric car power supply unit can not be contacted matchingly, wherein institute
Stating one or more of at least two electric energy transmission contact includes the main conductive part being electrically isolated from each other and time conductive part；
Electric energy transmission channel, the electric energy transmission channel have at least two transmission lines, and at least two transmission line respectively will
At least two electric energy transmission contact and load coupled of the baseplug are from the electric car power supply unit to described
Load transmission electric energy, wherein one or more transmission lines at least two transmission line are respectively coupled to one or more electricity
The main conductive part of contact can be transmitted；
Tension measuring circuit, the tension measuring circuit is couple to the main conductive part and the secondary conductive part, for measuring
State the voltage difference between main conductive part and the respective voltage of the secondary conductive part or the main conductive part and the secondary conductive part；
Current measurement circuit, the current measurement circuit are couple at least one transmission line at least two transmission line,
Its at least one biography coupled is flowed through when from the electric car power supply unit to the load transmission electric energy for measuring
The electric current of defeated line；And
Signal processor is couple to the tension measuring circuit and the current measurement circuit, for being surveyed according to the voltage
The current measurement result of the voltage measurements and the current measurement circuit of measuring circuit generates the electric car power supply unit
Power output plug electric energy transmission terminal and the baseplug electric energy transmission contact between contact impedance.
2. contact impedance measuring device according to claim 1, which is characterized in that the electric car power supply unit is straight
Galvanic electricity electrical automobile power supply unit, at least two electric energy transmission contact includes positive contact and negative contact.
3. contact impedance measuring device according to claim 1, which is characterized in that the electric car power supply unit is single
Phase a.c. electric car power supply unit, at least two electric energy transmission contact includes zero curve contact and phase line contact.
4. contact impedance measuring device according to claim 1, which is characterized in that the electric car power supply unit is three
Phase a.c. electric car power supply unit, at least two electric energy transmission contact includes zero curve contact and three phase line contacts；Institute
It states current measurement circuit and is couple to zero curve and the corresponding transmission line of three phase lines.
5. contact impedance measuring device according to claim 2, which is characterized in that the positive contact includes that positive is leading
Electric portion and positive time conductive part, and the negative contact includes the main conductive part of negative and negative time conductive part, wherein the voltage
Measuring circuit includes:
First voltage amplifying circuit, for receiving the voltage difference between the main conductive part of the positive and the positive time conductive part,
And generate first voltage signal；
Second voltage amplifying circuit, for receiving the voltage difference between the main conductive part of the negative and the negative time conductive part,
And generate second voltage signal；And
Tertiary voltage amplifying circuit, for receiving the voltage difference between the main conductive part of the positive and the main conductive part of the negative,
And generate tertiary voltage signal.
6. contact impedance measuring device according to claim 1, which is characterized in that the current measurement circuit includes:
Inductance coil, a transmission line being couple at least two transmission line simultaneously generate sample rate current, the sampling
Electric current is proportional to the electric current for flowing through the transmission line；
Sampling resistor, for the sample rate current to be converted to sampled voltage；And
Amplifying circuit, for receiving the sampled voltage and generating voltage signal.
7. contact impedance measuring device according to claim 1, which is characterized in that the main conductive part and the electric energy pass
Contact area between output terminals is greater than the contact area between the secondary conductive part and the electric energy transmission terminal.
8. contact impedance measuring device according to claim 1, which is characterized in that at least part of the main conductive part
Shape with hollow cylindrical, for the baseplug and the electric car power supply unit in the contact impedance measuring device
Around corresponding electric energy transmission terminal when coupling.
9. contact impedance measuring device according to claim 1, which is characterized in that the contact impedance measuring device and institute
It states load to integrate, the operation loaded for simulating the battery of the electric car.
10. contact impedance measuring device according to claim 1, which is characterized in that at least two electric energy transmission touching
Each electric energy transmission contact in head includes the main conductive part being electrically isolated from each other and time conductive part, and described at least two pass
Each transmission line in defeated line is both coupled to the main conductive part of an electric energy transmission contact.
11. contact impedance measuring device according to claim 10, which is characterized in that the electric car power supply unit is
Direct current drive automobile power supply unit, at least two electric energy transmission contact includes positive contact and negative contact；The positive
Contact includes the main conductive part of positive and positive time conductive part, and the negative contact includes that the main conductive part of negative and negative time are conductive
Portion；At least part of the main conductive part of positive and at least part of the main conductive part of the negative have hollow cylindrical
Shape, around corresponding when being coupled for the baseplug in the contact impedance measuring device with the electric car power supply unit
Electric energy transmission terminal；
Wherein the tension measuring circuit includes:
First voltage amplifying circuit, for receiving the voltage difference between the main conductive part of the positive and the positive time conductive part,
And generate first voltage signal；
Second voltage amplifying circuit, for receiving the voltage difference between the main conductive part of the negative and the negative time conductive part,
And generate second voltage signal；And
Tertiary voltage amplifying circuit, for receiving the voltage difference between the main conductive part of the positive and the main conductive part of the negative,
And generate tertiary voltage signal；
The current measurement circuit includes:
Inductance coil, a transmission line being couple at least two transmission line simultaneously generate sample rate current, the sampling
Electric current is proportional to the electric current for flowing through the transmission line；
Sampling resistor, for the sample rate current to be converted to sampled voltage；And
Amplifying circuit, for receiving the sampled voltage and generating voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820673413.XU CN208520923U (en) | 2018-05-07 | 2018-05-07 | Contact impedance measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820673413.XU CN208520923U (en) | 2018-05-07 | 2018-05-07 | Contact impedance measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208520923U true CN208520923U (en) | 2019-02-19 |
Family
ID=65342437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820673413.XU Active CN208520923U (en) | 2018-05-07 | 2018-05-07 | Contact impedance measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208520923U (en) |
-
2018
- 2018-05-07 CN CN201820673413.XU patent/CN208520923U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1247304B1 (en) | Shunt resistance device for monitoring battery state of charge | |
| JP4241787B2 (en) | Total battery voltage detection and leak detection device | |
| CN101256204B (en) | Current detecting device and calibration method | |
| CN101216515B (en) | Powerline pole tower ground resistance measurement method and its tester | |
| CN201955421U (en) | Wiring detector for multifunctional electric energy metering device | |
| CN102928657B (en) | Current measurement method and device | |
| KR20150052139A (en) | Device for detecting and measuring an insulation fault | |
| CN105116278B (en) | A kind of electric energy meter is visited one house after another wire searcher | |
| CN105223536A (en) | A kind of portable electric meter field calibration system | |
| CN109633240A (en) | Power battery pack voltage detection method and device | |
| CN102736049B (en) | Wireless-remote-control simulated dielectric loss device | |
| CN208520923U (en) | Contact impedance measuring device | |
| CN212410750U (en) | Data acquisition device suitable for single-phase earth fault line selection | |
| CN208721738U (en) | For measuring from electric car power supply unit to the direct current of load transmitting, exchange and device including direct current with the electric energy exchanged | |
| CN210465576U (en) | Multipoint potential equalization testing device | |
| CN205384360U (en) | BMS current parameter calibrating device | |
| CN209014646U (en) | The current detection circuit and electric machine controller of direct measuring type Hall sensor | |
| JP2021081240A (en) | Electric signal detector | |
| CN203502497U (en) | Measurement device of electrode impedance of three-electrode electric furnace | |
| CN102998531B (en) | Impedance bioelectrical measurement device | |
| CN214585665U (en) | Multi-shunt current sampling circuit, current measuring device and battery pack | |
| CN204964744U (en) | On --spot calibration system of portable electric energy meter | |
| CN103472305A (en) | Measurement device and measurement method of electrode impedance of three-electrode electric furnace | |
| US8907679B2 (en) | Meter apparatus having three-phase judgment function | |
| CN109085417A (en) | The current detection circuit and electric machine controller of direct measuring type Hall sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |