CN107478347A - The thermometry of charging gun and its contact point, device - Google Patents
The thermometry of charging gun and its contact point, device Download PDFInfo
- Publication number
- CN107478347A CN107478347A CN201710744160.0A CN201710744160A CN107478347A CN 107478347 A CN107478347 A CN 107478347A CN 201710744160 A CN201710744160 A CN 201710744160A CN 107478347 A CN107478347 A CN 107478347A
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- CN
- China
- Prior art keywords
- temperature
- contact point
- signal
- temperature sensor
- charging gun
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Abstract
The present invention relates to the thermometry of a kind of charging gun and its contact point, device, the thermometry comprises the following steps：S10. the temperature signal detected respectively at least two temperature sensors samples, to obtain temperature sampling signal, at least two temperature sensor is separately positioned on the diverse location of the connecting portion, and, the diameter parallel of the straight line and contact pin. with contacting points position to be measured on the same line；S20. according to the temperature sampling signal, the temperature value of the contact point is determined.Implement technical scheme, 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
The present invention relates to charging electric vehicle field, more particularly to the temperature survey side of a kind of charging gun and its contact point
Method, device.
Background technology
When charging electric vehicle electric current is bigger, charging plug and cable may all overheat, and jeopardize operation
Personal security.Wherein, charging plug is exposed in natural environment, after long-play, the contact point of charging plug and jack
Resistance becomes big, and contact point heating 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 can not 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.
The content of the invention
The technical problem to be solved in the present invention is that above-mentioned for prior art can not fill in accurate measurements charging process
The defects of temperature of the connecting portion of plug and jack, there is provided a kind of thermometry of charging gun and its contact point, dress
Put.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of temperature survey of charging gun contact point
Method, charging gun include gun body and contact pin, and the contact pin has and is arranged on the intercalation part on the outside of the gun body and is arranged on institute
The connecting portion in gun body is stated, the thermometry comprises 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 diameter parallel of the straight line and the contact pin；
S20. according to the temperature sampling signal, the temperature value of the contact point is determined.
Preferably, the 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.
Preferably, the step S20 includes：
According to the temperature sampling signal and the temperature calculation models pre-set, 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 present invention also constructs a kind of temperature measuring equipment of charging gun contact point, and charging gun includes gun body and contact pin, and institute
State contact pin have be arranged on the intercalation part on the outside of the gun body and the connecting portion being arranged 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 diameter parallel of the straight line and the contact pin；
Sampling module, the temperature signal for being detected at least two temperature sensors sample, to obtain temperature
Sampled signal；
Processing module, for according to the temperature sampling signal, determining the temperature of the contact point.
Preferably, the processing module, for according to the temperature sampling signal, at least two temperature sensor
Position and the position of the contact point, calculate the temperature of the contact point.
Preferably, the processing module, for according to the temperature sampling signal and the temperature calculation models pre-set,
The temperature of the contact point is calculated, wherein, the temperature calculation models are the positions according at least two temperature sensor
And the position of the contact point is established, and according to multigroup test data the temperature calculation models are modified.
Preferably, the quantity of the temperature sensor be two, and second temperature sensor be located at test point position and
Between the position of first temperature sensor；
The processing module includes：
For providing the reference power supply of reference voltage；
First difference channel, for temperature sampling signal and the reference voltage phase that will be sampled from the first temperature sensor
Subtract, to obtain the first differential signal；
Second difference channel, for temperature sampling signal and the reference voltage phase that will be sampled from second temperature sensor
Subtract, to obtain the second differential signal；
Subtraction circuit, after the second differential signal and the first differential signal are subtracted each other, multiplied by with proportionality coefficient, to obtain
First M signal, wherein, the position phase of the proportionality coefficient and the first temperature sensor, second temperature sensor and contact point
Close；
Add circuit, for the first M signal to be superimposed with first differential signal, to obtain among second
Signal；
Single-chip microcomputer, for handling the second M signal, to obtain the temperature value of the contact point.
Preferably, the sampling module is bridge-type sampling module.
The present invention also constructs a kind of charging gun, including gun body and contact pin, and the contact pin, which has, to be arranged on the outside of the gun body
Intercalation part and the connecting portion that is arranged in the gun body, it is characterised in that the temperature survey described in also including any of the above item
Device.
Implement technical scheme, at least two temperature sensors are installed by the connecting portion in contact pin, and to institute
The temperature value that the temperature sensor of installation is detected is handled, and can obtain the contact point that the insertion section of contact pin not directly measures
The temperature value at place, then limit charging current using the temperature value calculated or protected, avoid charging process accident
Occur.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used makees letter in being described below to embodiment
Singly introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for the common skill in this area
For art personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.Accompanying drawing
In：
Fig. 1 is the flow chart of the thermometry embodiment one of charging gun contact point of the present invention；
Fig. 2 is the structural representation of charging gun embodiment one of the present invention；
Fig. 3 is the circuit diagram of the temperature measuring equipment embodiment one of charging gun contact point of the present invention.
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 forms contact to be inserted during charging electric vehicle in the socket on electric automobile
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 diameter parallel of the straight line and 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 scheme 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 influenceed 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 diameter parallel of the straight line and contact pin, so, after the structure and material of contact pin determines, multiple TEMPs
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 the temperature calculation models pre-set, 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, it is smaller compared to a upper embodiment, error.
Fig. 2 is the structural representation of charging gun embodiment one of the present invention, and the charging gun of the embodiment includes gun body 20, contact pin
10 and temperature testing device (not shown), contact pin 10 has the intercalation part 12 for being arranged on the outside of gun body 20 and is arranged in gun body 20
Connecting portion 11, wherein, connecting portion 11 is connected with the cable of charging pile.Intercalation part 12 inserts inserting on electric automobile in charging
In seat, 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 contact point to be measured position A exist
On same straight line, the diameter parallel of the straight line and 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, determine 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 is 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 the temperature calculation models pre-set, 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 TEMP
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 single-chip microcomputer.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；Single-chip microcomputer 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 voltage-regulator diode ZD1, and resistance R1 one end connects power supply (VCC), its
Other end connection voltage-regulator diode ZD1 negative pole, voltage-regulator diode ZD1 plus earth, resistance R2, R3 are connected on the pole of voltage stabilizing two
Between pipe ZD1 negative pole and ground.
Sampling module is bridge-type sampling module, after resistance R4 connects with resistance RT1, one end connection voltage-regulator diode ZD1's
Negative pole, other end ground connection.After resistance R5 connects with resistance RT2, one end connection voltage-regulator diode ZD1 negative pole, other end ground connection.
First difference channel includes amplifier U1, resistance R6, R7, R8, R12, moreover, amplifier U1 inverting input passes through electricity
Hinder R6 connection resistance R2, R3 tie point, the company that amplifier U1 in-phase input end passes through resistance R7 connection resistance R4 and resistance RT1
Contact, amplifier U1 in-phase input end are also grounded by resistance R8, are connected between amplifier U1 output end and inverting input
Resistance R12.When resistance R12, R6, R7 resistance 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, amplifier U2 inverting input passes through resistance
R9 connection resistance R2, R3 tie point, the company that amplifier U2 in-phase input end passes through resistance R10 connection resistance R5 and resistance RT2
Contact, amplifier U2 in-phase input end are also grounded by resistance R11, are connected between amplifier U2 output end and inverting input
Resistance R13.When resistance R13, R9, R10 resistance 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, amplifier U3 inverting input passes through resistance R14
Amplifier U1 output end is connect, amplifier U3 in-phase input end connects amplifier U2 output end by resistance R15, and resistance R16 is connected to
Between amplifier U3 output end and inverting input.When resistance R14, R15 resistance are equal, and with resistance R16 resistance
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, amplifier U4 in-phase input end ground connection, its is anti-phase
Input connects amplifier U3 output end by resistance R18, resistance R17 be connected to amplifier U4 inverting input and amplifier U1 it is defeated
Go out between end, resistance R19 is connected between amplifier U4 output end and inverting input.When resistance R19, R17, R18 resistance
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.
Single-chip microcomputer (not shown) connection amplifier U4 output end, 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 K value between BC.Certainly, in practice, it is reduction
Error, before charging gun use, the K values (initial value) can be calibrated using multigroup test data.In addition, it can also pass through
The mode of multigroup test data fitting asks for K values.
It should be noted that, above example is exemplified by installing two temperature sensors in the connecting portion of contact pin in addition
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 preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, any bun made
Change, equivalent substitution, improvement etc., should be included within scope of the presently claimed invention.
Claims (9)
1. a kind of thermometry 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 the thermometry
Comprise the following steps：
S10. the temperature signal detected respectively at least two temperature sensors samples, to obtain temperature sampling signal,
At least two temperature sensor is separately positioned on the diverse location of the connecting portion, and exists with contacting points position to be measured
On same straight line, the diameter parallel of the straight line and the contact pin；
S20. according to the temperature sampling signal, the temperature value of the contact point is determined.
2. the thermometry of charging gun contact point according to claim 1, it is characterised in that the step S20 bags
Include：
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.
3. the thermometry of charging gun contact point according to claim 1, it is characterised in that the step S20 bags
Include：
According to the temperature sampling signal and the temperature calculation models pre-set, the temperature of the contact point is calculated, wherein, institute
Stating temperature calculation models is 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.
4. 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 diameter parallel of the straight line and the contact pin；
Sampling module, the temperature signal for being detected at least two temperature sensors sample, to obtain temperature sampling
Signal；
Processing module, for according to the temperature sampling signal, determining the temperature of the contact point.
5. the temperature measuring equipment of charging gun contact point according to claim 4, it is characterised in that
The processing module, for according to the temperature sampling signal, the position of at least two temperature sensor and described
The position of contact point, calculate the temperature of the contact point.
6. the temperature measuring equipment of charging gun contact point according to claim 4, it is characterised in that
The processing module, for according to the temperature sampling signal and the temperature calculation models pre-set, being connect described in calculating
The temperature of contact, wherein, the temperature calculation models are the position and the contact according at least two temperature sensor
What the position of point was established, and the temperature calculation models are modified according to multigroup test data.
7. the temperature measuring equipment of charging gun contact point according to claim 4, 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；
First difference channel, for the temperature sampling sampled from the first temperature sensor signal to be subtracted each other with reference voltage, with
Obtain the first differential signal；
Second difference channel, for the temperature sampling sampled from second temperature sensor signal to be subtracted each other with reference voltage, with
Obtain the second differential signal；
Subtraction circuit, after the second differential signal and the first differential signal are subtracted each other, 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, for the first M signal to be superimposed with first differential signal, to obtain second M signal；
Single-chip microcomputer, for handling the second M signal, to obtain the temperature value of the contact point.
8. the temperature measuring equipment of charging gun contact point according to claim 4, it is characterised in that the sampling module is
Bridge-type sampling module.
9. 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 the temperature measuring equipment described in also including claim any one of 4-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710744160.0A CN107478347B (en) | 2017-08-25 | 2017-08-25 | Charging gun and temperature measuring method and device for contact point of charging gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710744160.0A CN107478347B (en) | 2017-08-25 | 2017-08-25 | Charging gun and temperature measuring method and device for contact point of charging gun |
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| Publication Number | Publication Date |
|---|---|
| CN107478347A true CN107478347A (en) | 2017-12-15 |
| CN107478347B CN107478347B (en) | 2023-08-01 |
Family
ID=60602651
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710744160.0A Active CN107478347B (en) | 2017-08-25 | 2017-08-25 | Charging gun and temperature measuring method and device for contact point of charging gun |
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Cited By (1)
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| JP2021129455A (en) * | 2020-02-14 | 2021-09-02 | トヨタ自動車株式会社 | Electric motor car |
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| Publication number | Publication date |
|---|---|
| CN107478347B (en) | 2023-08-01 |
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