CN207263326U - The temperature measuring equipment of charging gun and its contact point - Google Patents
The temperature measuring equipment of charging gun and its contact point Download PDFInfo
- Publication number
- CN207263326U CN207263326U CN201721088369.8U CN201721088369U CN207263326U CN 207263326 U CN207263326 U CN 207263326U CN 201721088369 U CN201721088369 U CN 201721088369U CN 207263326 U CN207263326 U CN 207263326U
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- Prior art keywords
- temperature
- contact point
- signal
- temperature sensor
- sampling
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Abstract
A kind of temperature measuring equipment of charging gun and its contact point is the utility model is related to, which includes：At least two temperature sensors of the connecting portion diverse location are arranged on, and the position of at least two temperature sensor and the position of contact point to be measured are on the same line, the straight line is parallel with the axis of the contact pin；Temperature signal for being detected at least two temperature sensors samples, to obtain the sampling module of temperature sampling signal；For according to the temperature sampling signal, determining the processing module of the temperature of the contact point.Implement the technical solution of the utility model, at least two temperature sensors are installed by the connecting portion in contact pin, and the temperature value that the temperature sensor to being installed is detected is handled, and can obtain the temperature value at the contact point that the insertion section of contact pin not directly measures.
Description
Technical field
It the utility model is related to electric automobile charging field, more particularly to the temperature survey of a kind of charging gun and its contact point
Device.
Background technology
When electric automobile charging current is bigger, charging plug and cable may all overheat, and jeopardize operation
Personnel safety.Wherein, charging plug is exposed in natural environment, after long-play, the contact point of charging plug and jack
Resistance becomes larger, and contact point fever is serious, in order to ensure charging safety is, it is necessary to which the temperature of butt contact is monitored.But charging is inserted
The structure qualification of head can not install temp probe in contacting points position, and cannot be true in other positions installation temp probe
Reflect the temperature of contact point.Therefore need to take special processing, being capable of charging plug and jack in accurate measurements charging process
The temperature of connecting portion.
Utility model content
The technical problems to be solved in the utility model is that above-mentioned for the prior art can not accurate measurements charging process
The defects of temperature of the connecting portion of middle charging plug and jack, there is provided the temperature survey dress of a kind of charging gun and its contact point
Put.
Technical solution is used by the utility model solves its technical problem：Construct a kind of temperature of charging gun contact point
Measuring device, charging gun includes gun body and contact pin, and the contact pin has intercalation part and the setting being arranged on the outside of the gun body
Connecting portion in the gun body, including：
It is arranged at least two temperature sensors of the connecting portion diverse location, and at least two temperature sensor
Position and contact point to be measured position on the same line, the straight line is parallel with the axis of the contact pin；
Temperature signal for being detected at least two temperature sensors is sampled to obtain temperature sampling signal
Sampling module；
Processing module for the temperature that the contact point is determined according to the temperature sampling signal.
Preferably, it is characterised in that
The processing module according to the temperature sampling signal, at least two temperature sensor position and described connect
The position of contact, calculates the temperature of the contact point.
Preferably, the quantity of the temperature sensor be two, and second temperature sensor be located at contact point position and
Between the position of first temperature sensor；
The processing module includes：
For providing the reference power supply of reference voltage；
It is poor to obtain first for the temperature sampling sampled from the first temperature sensor signal to be subtracted each other with reference voltage
First difference channel of sub-signal；
It is poor to obtain second for the temperature sampling sampled from second temperature sensor signal to be subtracted each other with reference voltage
Second difference channel of sub-signal；
After the second differential signal and the first differential signal are subtracted each other, multiplied by with proportionality coefficient, to obtain among first
The subtraction circuit of signal, wherein, the proportionality coefficient and the first temperature sensor, the position of second temperature sensor and contact point
It is related；
For the first M signal to be superimposed with first differential signal, to obtain the addition of second M signal
Circuit；
For handling the second M signal, to obtain the microcontroller of the temperature value of the contact point.
Preferably, the sampling module is bridge-type sampling module.
The utility model also constructs a kind of charging gun, including gun body and contact pin, and the contact pin, which has, is arranged on the gun body
The intercalation part in outside and the connecting portion being arranged in the gun body, it is characterised in that further include the temperature described in any of the above item
Measuring device.
Implement the technical solution of the utility model, by installing at least two temperature sensors in the connecting portion of contact pin, and
The temperature value detected to the temperature sensor installed is handled, and can obtain that the insertion section of contact pin not directly measures connects
Temperature value at contact, then limits charging current using the temperature value calculated or is protected, avoid charging process
Accident occurs.
Brief description of the drawings
, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of the utility model embodiment
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the utility model, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.In attached drawing：
Fig. 1 is the flow chart of the thermometry embodiment one of the utility model charging gun contact point；
Fig. 2 is the structure diagram of the utility model charging gun embodiment one；
Fig. 3 is the circuit diagram of the temperature measuring equipment embodiment one of the utility model charging gun contact point.
Embodiment
Fig. 1 is the flow chart of the thermometry embodiment one of charging gun contact point, is illustrated first, charging gun bag
Include gun body and contact pin, and contact pin has and is arranged on the intercalation part on the outside of gun body and the connecting portion being arranged in gun body, wherein, connection
Portion is connected with the cable of charging pile, and intercalation part is inserted into the socket on electric automobile when charging for electric automobile, forms contact
Point.By the method for the embodiment, temperature survey, specifically, the charging gun contact point of the embodiment can be carried out to the contact point
Thermometry comprise the following steps：
S10. the temperature signal detected respectively at least two temperature sensors samples, to obtain temperature sampling letter
Number, at least two temperature sensor is separately positioned on the diverse location of the connecting portion, and with contact point position to be measured
Put on the same line, the straight line is parallel with the axis of contact pin, in this step, temperature sensor can use PT1000 or its
His temperature element；
S20. according to the temperature sampling signal, the temperature value of the contact point is determined.
In the technical solution of the embodiment, firstly, since the connecting portion of contact pin is arranged in gun body, and for connecting electricity
Cable, so, on connecting portion can mounting temperature sensor, and the plug of intercalation part is not influenced after mounting temperature sensor.The implementation
Example is due to the connecting portion by the way that at least two temperature sensors to be arranged on to contact pin, and the position of temperature sensor and contact point exist
On same straight line, the straight line is parallel with the axis of contact pin, so, after the structure and material of contact pin determines, multiple temperature sensing
Thermal resistance between device position and contacting points position meets certain relation, therefore, can be detected according to the plurality of temperature sensor
Temperature value, determine the temperature value at contact point.
In a specific embodiment, step S20 includes：
According to the position of the temperature sampling signal, the position of at least two temperature sensor and the contact point,
Calculate the temperature of the contact point.
In another specific embodiment, step S20 includes：
According to the temperature sampling signal and pre-set temperature calculation models, the temperature of the contact point is calculated, its
In, the temperature calculation models are established according to the position of at least two temperature sensor and the position of the contact point
, and the temperature calculation models are modified according to multigroup test data.
The embodiment is when calculating the temperature of contact point, due to being calculated according to the temperature calculation models that pre-set
, and the temperature calculation models are corrected after foundation always according to multigroup test data, so, the contact point calculated
Temperature value it is more accurate, compared to a upper embodiment, error smaller.
Fig. 2 is the structure diagram of the utility model charging gun embodiment one, the charging gun of the embodiment include gun body 20,
Contact pin 10 and temperature testing device (not shown), contact pin 10 have the intercalation part 12 for being arranged on the outside of gun body 20 and are arranged on gun body
Connecting portion 11 in 20, wherein, connecting portion 11 is connected with the cable of charging pile.Intercalation part 12 is inserted on electric automobile in charging
Socket in, contact point is formed, for example, contact point temperature to be measured is the temperature at the A of position.
In addition, temperature measuring equipment includes two temperature sensors, sampling module and processing module, wherein, two temperature
Sensor is separately positioned at position B, C of connecting portion 11, and its installation site B, C and the position A of contact point to be measured exist
On same straight line, the straight line is parallel with the axis of contact pin.Sampling module is used for the temperature letter detected to two temperature sensors
Number sampled, to obtain respective temperature sampling signal.The preferred bridge-type sampling module of sampling module.Processing module is used for basis
The temperature sampling signal, determines the temperature of contact point, i.e. the temperature at the position A of contact pin.
In certain embodiments, processing module only includes processor or controller with data operation processing function, i.e.
The temperature sampling signal of sampling module output is sent directly into processing module, and processing module includes but not limited to microprocessor, micro-
Controller, digital signal processor, micro calculator, central processing unit, field programming gate array, programmable logic device etc. are set
It is standby.Then, by the processing module according to the temperature sampling signal, the temperature of contact point is determined.Specifically, in one embodiment
In, processing module is used for according to the temperature sampling signals of two temperature sensors, the position of two temperature sensors and contact point
Position, calculate the temperature of the contact point.In another embodiment, processing module is used for according to the temperature sampling signal
And pre-set temperature calculation models, the temperature of the contact point is calculated, wherein, the temperature calculation models are according to two
What the position of temperature sensor and the position of the contact point were established, and according to multigroup test data to the temperature computation mould
Type is modified.
In further embodiments, processing module is collectively constituted by logic circuit and processor or controller.Specifically, exist
In one embodiment, two temperature sensors are respectively the first temperature sensor and second temperature sensor, the first temperature sensing
The resistance of device is RT1, and the resistance of second temperature sensor is RT2, moreover, second temperature sensor be located at the position of contact point with
Between the position of first temperature sensor, with reference to Fig. 2, the first temperature sensor is installed at the C of position, installation second is warm at the B of position
Sensor is spent, and assumes that the thermal resistance between AC is Rt1, the thermal resistance between BC is Rt2.Processing module includes reference power supply, first
Difference channel, the second difference channel, subtraction circuit, add circuit and microcontroller.Wherein, the first difference channel is used for the first temperature
Temperature sampling signal corresponding to degree sensor subtracts each other with reference voltage, to obtain the first differential signal；Second difference channel is used
Subtract each other in by the temperature sampling signal corresponding to second temperature sensor with reference voltage, to obtain the second differential signal；Subtraction
Circuit is used for after subtracting each other the second differential signal and the first differential signal, multiplied by with proportionality coefficient, to obtain first M signal,
Wherein, the proportionality coefficient is related to the position of the first temperature sensor, second temperature sensor and contact point；Add circuit is used
In the first M signal is superimposed with first differential signal, to obtain second M signal；Microcontroller is used for institute
State second M signal to be handled, to obtain the temperature value of the contact point.Illustrate the tool of the processing module with reference to Fig. 3
Body circuit：
Reference power supply includes resistance R1, R2, R3 and zener diode ZD1, and one end of resistance R1 connects power supply (VCC), its
The anode of other end connection zener diode ZD1, the plus earth of zener diode ZD1, resistance R2, R3 are connected on two pole of voltage stabilizing
Between the anode and ground of pipe ZD1.
Sampling module is bridge-type sampling module, after resistance R4 connects with resistance RT1, one end connection zener diode ZD1's
Anode, other end ground connection.After resistance R5 connects with resistance RT2, the anode of one end connection zener diode ZD1, other end ground connection.
First difference channel includes amplifier U1, resistance R6, R7, R8, R12, moreover, the inverting input of amplifier U1 passes through electricity
Hinder the tie point of R6 connection resistance R2, R3, the company that the in-phase input end of amplifier U1 passes through resistance R7 connection resistance R4 and resistance RT1
Contact, the in-phase input end of amplifier U1 are also grounded by resistance R8, are connected between the output terminal and inverting input of amplifier U1
Resistance R12.When the resistance value of resistance R12, R6, R7 are equal, amplifier U1 and resistance R6, R7, R8, R12 form subtracter, pass through by
The temperature sampling signal of the first temperature sensor sampled subtracts each other with reference voltage, so as to export the first differential signal.Equally
Ground, the second difference channel includes amplifier U2, resistance R9, R10, R11, R13, moreover, the inverting input of amplifier U2 passes through resistance
The tie point of R9 connection resistance R2, R3, the company that the in-phase input end of amplifier U2 passes through resistance R10 connection resistance R5 and resistance RT2
Contact, the in-phase input end of amplifier U2 are also grounded by resistance R11, are connected between the output terminal and inverting input of amplifier U2
Resistance R13.When the resistance value of resistance R13, R9, R10 are equal, amplifier U2 and resistance R9, R10, R11, R13 form subtracter, lead to
The temperature sampling signal for crossing the second temperature sensor that will be sampled subtracts each other with reference voltage, so as to export the second differential signal.
Subtraction circuit includes amplifier U3, resistance R14, R15, R16, moreover, the inverting input of amplifier U3 passes through resistance R14
The output terminal of amplifier U1 is connect, the in-phase input end of amplifier U3 connects the output terminal of amplifier U2 by resistance R15, and resistance R16 is connected to
Between the output terminal and inverting input of amplifier U3.When the resistance value of resistance R14, R15 are equal, and differed with the resistance value of resistance R16
When, amplifier U3 and resistance R14, R15, R16 form subtracter, after the second differential signal and the first differential signal are subtracted each other,
Multiplied by with Proportional coefficient K (R16/R14), so as to export first M signal.Herein it should be noted that, choose R14, R15,
During R16, the position relationship of the first temperature sensor, second temperature sensor and contact point should be referred to.
Add circuit includes amplifier U4, resistance R17, R18, R19, moreover, the in-phase input end ground connection of amplifier U4, its is anti-phase
Input terminal connects the output terminal of amplifier U3 by resistance R18, resistance R17 be connected to amplifier U4 inverting input and amplifier U1 it is defeated
Between outlet, resistance R19 is connected between the output terminal and inverting input of amplifier U4.When the resistance value of resistance R19, R17, R18
When equal, amplifier U4, resistance R17, R18, R19 form adder, first M signal are added with the first differential signal, with defeated
Go out second M signal.
The output terminal of microcontroller (not shown) connection amplifier U4, for the second M signal inputted to be processed into temperature
Signal, the temperature signal are the temperature at contact point A.
Finally it should be noted that, on Proportional coefficient K, ideally, fixed in the material of the contact pin of charging gun, and be
During cylindric or rectangular shape, the ratio of length between the length and AC of the value of K between BC.Certainly, in practice, it is reduction
Error, before charging gun use, can calibrate the K values (initial value) using multigroup test data.In addition, it can also pass through
The mode of multigroup test data fitting asks for K values.
In addition it should be noted that, above example is exemplified by installing two temperature sensors in the connecting portion of contact pin
Illustrate, it should be appreciated that in other embodiments, greater number temperature sensor can be set, then according to each two
The temperature value that temperature sensor is detected calculates the temperature of contact point, finally carries out fusion meter to all temperature values obtained
Calculate.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, made it is any distort, equivalent substitution, improvement etc., should be included within the right of the utility model.
Claims (5)
1. a kind of temperature measuring equipment of charging gun contact point, charging gun includes gun body and contact pin, and the contact pin has setting
Intercalation part on the outside of the gun body and the connecting portion being arranged in the gun body, it is characterised in that including：
It is arranged at least two temperature sensors of the connecting portion diverse location, and the position of at least two temperature sensor
Put with the position of contact point to be measured on the same line, the straight line is parallel with the axis of the contact pin；
Temperature signal for being detected at least two temperature sensors is sampled to obtain the sampling of temperature sampling signal
Module；
Processing module for the temperature that the contact point is determined according to the temperature sampling signal.
2. the temperature measuring equipment of charging gun contact point according to claim 1, it is characterised in that
The processing module is according to the temperature sampling signal, the position of at least two temperature sensor and the contact point
Position, calculate the temperature of the contact point.
3. the temperature measuring equipment of charging gun contact point according to claim 1, it is characterised in that the temperature sensor
Quantity be two, and second temperature sensor is located between the position of contact point and the position of the first temperature sensor；
The processing module includes：
For providing the reference power supply of reference voltage；
For the temperature sampling sampled from the first temperature sensor signal to be subtracted each other with reference voltage, to obtain the first difference letter
Number the first difference channel；
For the temperature sampling sampled from second temperature sensor signal to be subtracted each other with reference voltage, to obtain the second difference letter
Number the second difference channel；
After the second differential signal and the first differential signal are subtracted each other, multiplied by with proportionality coefficient, to obtain first M signal
Subtraction circuit, wherein, the position phase of the proportionality coefficient and the first temperature sensor, second temperature sensor and contact point
Close；
For the first M signal to be superimposed with first differential signal, to obtain the addition of second M signal electricity
Road；
For handling the second M signal, to obtain the microcontroller of the temperature value of the contact point.
4. the temperature measuring equipment of charging gun contact point according to claim 1, it is characterised in that the sampling module is
Bridge-type sampling module.
5. a kind of charging gun, including gun body and contact pin, the contact pin has intercalation part and the setting being arranged on the outside of the gun body
Connecting portion in the gun body, it is characterised in that further include claim 1-4 any one of them temperature measuring equipments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721088369.8U CN207263326U (en) | 2017-08-25 | 2017-08-25 | The temperature measuring equipment of charging gun and its contact point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721088369.8U CN207263326U (en) | 2017-08-25 | 2017-08-25 | The temperature measuring equipment of charging gun and its contact point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207263326U true CN207263326U (en) | 2018-04-20 |
Family
ID=61923248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721088369.8U Expired - Fee Related CN207263326U (en) | 2017-08-25 | 2017-08-25 | The temperature measuring equipment of charging gun and its contact point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207263326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478347A (en) * | 2017-08-25 | 2017-12-15 | 深圳奥特迅电力设备股份有限公司 | The thermometry of charging gun and its contact point, device |
-
2017
- 2017-08-25 CN CN201721088369.8U patent/CN207263326U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478347A (en) * | 2017-08-25 | 2017-12-15 | 深圳奥特迅电力设备股份有限公司 | The thermometry of charging gun and its contact point, device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20210825 |