阅读说明：本技术 Dc充电电缆以及用于确定所述dc充电电缆的温度的方法 (The method of DC charging cable and the temperature for determining the DC charging cable ) 是由 W.佐恩 R.比尔德比克 S.拉吉马克斯 G.库伦 于 2019-05-23 设计创作，主要内容包括：本发明涉及直流DC充电电缆,所述直流DC充电电缆包括：两个DC导体,所述两个DC导体配置用于在电动车辆与充电装置之间传送电能；至少信号线路,所述至少信号线具有第一信号线路端和第二相反的信号线路端；以及控制装置,由此所述第一信号线路端在第一连接点处连接到所述DC导体中的一个导体,以及所述控制装置配置用于测量所述第二信号线路端与远离所述第一连接点的所述DC导体中的所述一个导体的第二连接点之间的电压差,以用于确定所述DC充电电缆的温度。(The present invention relates to direct current DC charging cable, the direct current DC charging cable includes: two DC conductors, and described two DC conductors are configured to transmit electric energy between electric vehicle and charging unit；At least signal line, at least signal wire have the first signal wire terminal and the second opposite signal wire terminal；And control device, thus the first signal wire terminal is connected to a conductor in the DC conductor at the first tie point, and the control device is configured to measure the voltage difference between the second tie point of one conductor in the DC conductor of the second signal line scan pickup coil side and separate first tie point, for determining the temperature of the DC charging cable.)

1. a kind of direct current DC charging cable, the direct current DC charging cable includes: two DC conductors, described two DC conductor configurations For transmitting electric energy between the charging unit in electric vehicle and for the electric vehicle；At least signal line, it is described at least Signal line has the first signal wire terminal and the second opposite signal wire terminal；And control device, thus

The first signal wire terminal is connected to a DC conductor in the DC conductor at the first tie point, and

The DC that the control device is configured to measure the second signal line scan pickup coil side and separate first tie point is led Between second tie point of one DC conductor in body because one DC conductor in the DC conductor inside electricity Voltage difference caused by hindering, for determining the temperature of the DC charging cable.

2. DC charging cable as described in claim 1, including be arranged in the second signal line scan pickup coil side and connect with described second Voltage measuring apparatus between point, and/or thus the signal line is parallel with one DC conductor in the DC conductor Ground extends between first tie point and second tie point.

3. DC charging cable as described in claim 1, including second signal route, the second signal route has corresponding the One signal wire terminal and corresponding second opposite signal wire terminal, thus

The corresponding first signal wire terminal is connected to another conductor in the DC conductor at corresponding first tie point, with And

The control device is configured to measure the corresponding second signal line scan pickup coil side and separate corresponding first tie point Second voltage between corresponding second tie point of another conductor in the DC conductor is poor, for determining the DC charging The second temperature of cable.

4. DC charging cable as claimed in claim 3, thus the control device is configured to combine measured voltage difference With measured second voltage difference and/or identified temperature and identified second temperature.

5. DC charging cable as described in claim 1, thus the DC charging cable includes first end and the second opposite end, institute The first tie point is stated to be at the first end, and second tie point is at the second end.

6. DC charging cable as described in claim 1, first end or the second opposite end company, institute including the DC charging cable The charge connector being connected to, thus first tie point is arranged in the charge connector.

7. DC charging cable as described in claim 1, first end or the second opposite end company, institute including the DC charging cable The charging unit being connected to, thus second tie point is arranged in the charging unit.

8. DC charging cable as described in claim 1, thus the control device is configured to calibrate for the temperature Measured voltage difference and/or the control device are configured to measure the electric current of at least one of described DC conductor.

9. DC charging cable as described in claim 1, thus the control device is configured to based on the DC conductor Predetermined calibration resistance at a temperature of knowing determines that the temperature and/or the control device are configured in response to measured Temperature and the charging current for controlling the DC conductor.

10. a kind of method for determining the temperature of DC charging cable, the DC charging cable includes: two DC conductors, described Two DC conductors are configured to transmit electric energy between the charging unit in electric vehicle and for the electric vehicle；At least signal Route, at least signal line have the first signal wire terminal and the second opposite signal wire terminal, thus

The first signal wire terminal is connected to a conductor and the method in the DC conductor at the first tie point Include the following steps:

It measures in the DC conductor at the second tie point of the second signal line scan pickup coil side and separate first tie point Voltage difference caused by the internal resistance because of one conductor in the DC conductor between one conductor, for true The temperature of the fixed DC charging cable.

11. method as claimed in claim 11, thus one conductor in the signal line and the DC conductor is flat Row ground extends between first tie point and second tie point.

12. method as claimed in claim 11, including second signal route, the second signal route has corresponding first letter Number line scan pickup coil side and corresponding second opposite signal wire terminal, thus

The corresponding first signal wire terminal is connected to another conductor in the DC conductor at corresponding first tie point, and And thus the method includes the following steps:

Measure the corresponding second signal line scan pickup coil side to far from corresponding first tie point the DC conductor in another Second voltage between corresponding second tie point of conductor is poor, for determining the second temperature of the DC charging cable.

13. method as claimed in claim 12, thus the method includes the following steps: combining measured voltage difference and institute The second voltage difference of measurement and/or identified temperature and identified second temperature.

14. method as claimed in claim 11, thus the DC charging cable includes first end and the second opposite end, described One tie point is at the first end, and second tie point is at the second end.

15. method as claimed in claim 11, first end or the second opposite end including the DC charging cable are connected to Charge connector, thus first tie point is arranged in the charge connector.

16. method as claimed in claim 11, first end or the second opposite end including the DC charging cable are connected to Charging unit, thus second tie point is arranged in the charging unit.

17. method as claimed in claim 11, including the following steps: calibrate measured voltage difference for the temperature.

18. DC charging cable as described in any one of preceding claims or method, including the following steps: measure the DC The electric current of at least one of conductor.

19. DC charging cable as described in any one of preceding claims or method, including the following steps: be based on the DC Predetermined resistance under the known temperature of conductor determines the temperature.

20. method as claimed in claim 11, including the following steps: control the DC conductor in response to measured temperature Charging current.

Technical field

The present invention relates to direct current DC charging cable, the direct current DC charging cable include be configured to electric vehicle with fill Two DC conductors of electric energy are transmitted between electric installation.The invention further relates to the sides for determining the temperature of the DC charging cable Method, the DC charging cable include two DC conductors for being configured to transmit electric energy between electric vehicle and charging unit.

Background technique

Electric vehicle has become very popular in many countries.In order to be charged using electric energy to the vehicle, fill Electric installation is mounted in public space (such as parking lot) or at private site.The charging unit equipped with charging cable, The charging cable is inserted into electric vehicle by charge connector.In the charging session using current charging unit During (charging session), 500 A or more than electric current be applied on charging cable, with for realizing it is so-called quickly Charging.The cable resistance of copper in charging cable causes the temperature of charging cable to increase.If apply 500 A or more than electricity Stream, even if then charging cable is cooled down by coolant, charging cable is also easy to reach 70 DEG C or more of temperature.

Therefore, the temperature for monitoring charging cable is importance, to avoid the overheat and failure of charging cable.But Current conventional components do not allow to accurately determine the temperature of this kind of charging cable.For example, as it is known that solution do not monitor it is whole A charging cable stops when the flowing stopping of coolant or the measurement solution for temperature are not applicable in electric vehicle Only monitoring temperature.

Summary of the invention

Therefore, the purpose of the present invention is to DC charging cable to be provided and for easily and securely determining charging cable The correlation method of temperature.

The purpose is solved by the feature of independent claims.Preferred embodiment is described in detail in the dependent claims.

Therefore, which is solved by direct current DC charging cable, and the direct current DC charging cable preferably includes: at least Two DC conductors, at least two DC conductor are configured to transmit electric energy between electric vehicle and charging unit；At least believe Number route, at least signal line have the first signal wire terminal and the second opposite signal wire terminal；And control device, Thus

First signal wire terminal is connected to a conductor in DC conductor at the first tie point, and

Control device is configured to measurement second signal line scan pickup coil side and leads with one in the DC conductor of separate first tie point Voltage difference between second tie point of body, for determining the temperature of DC charging cable.

By solving for the method for determining the temperature of DC charging cable, the DC charging cable preferably wraps the purpose Include: at least two DC conductors, at least two DC conductor are configured to transmit electric energy between electric vehicle and charging unit； At least signal line, at least signal line have the first signal wire terminal and the second opposite signal wire terminal；Thus

The conductor and this method that first signal wire terminal is connected in DC conductor at the first tie point include following step It is rapid:

Measure one conductor in the DC conductor at the second tie point of second signal line scan pickup coil side and separate first tie point Between voltage difference, for determining the temperature of DC charging cable.

Therefore, key point of the invention is measurement voltage difference, and determines DC conductor and/or DC charging electricity based on this The temperature of cable.Charging normal ession for telecommunication, for so-called quick charge the usual electric current in the range of 500A from filling Electric installation flows to electric vehicle.A conductor being only connected at the first signal wire terminal due to signal line in DC conductor, So while being for example connected to DC conductor by voltage measuring apparatus at second signal line scan pickup coil side, letter also is flowed through without electric current Number route, so that voltage difference is not present between the first signal wire terminal and second signal line scan pickup coil side.

Due to flowing through the electric current of DC conductor and due to the internal resistance of DC conductor, connect in second signal line scan pickup coil side and second Between contact measured voltage difference (also referred to as voltage drop) allow to determine DC conductor copper and/or DC conductor actual temperature with And it is thus determined that DC cable actual temperature because the voltage drop on copper cable under some electric current depend on its temperature.Therefore, The DC charging cable and/or method proposed uses the thermoelectric property of DC conductor itself, easily and accurately to determine DC conductor Actual temperature.Particularly, the DC charging cable that is proposed and/or method are in particular upon known to DC conductor and/or calibrating Resistance, based on actual charge current and based on the DC conductor from measured electric current and voltage difference in this way determine practical electricity It hinders and allows the accurate determination to the temperature of DC charging cable and/or DC conductor.

DC charging cable may include other conductors, such as such as be used for close to pilot tone (proximity pilot) PP signal PP route, the CP route for controlling pilot tone CP signal line and/or the PE route for PE signal.PP route, CP route And/or PE route and corresponding signaling preferably according to so-called combined charging system CCS agreement (particularly according to IEC 61851 or IEC 61851-23 standard) Lai Shixian.Combined charging system CCS agreement is a kind of for filling to electric vehicle The fast charge method of electricity, via from (derived from) SAE J1772 standard (IEC Class1) or IEC type 2 The charge connector of connector transmits high voltage direct current.Support CCS auto manufacturing include Jaguar, Volkswagen, General Motors, BMW, Daimler, Ford, FCA, Tesla and Hyundai.CSS standard is by so-called CharIN association (consortium) it controls.In addition, such as such as CHAdeMO (abbreviation as CHArge de Move) or particularly pressing Other agreements of GB/T according to 20234.3-2011 standard etc can also make together with the DC charging cable and/or method With.DC charging cable and method are applicable to different types of electric vehicle, including such as electrobus.Preferably, DC Charging cable and/or method are configured to charge to electric vehicle using the DC input voltage of up to 1500V DC.

In general, voltage difference (and referred to simply as voltage) can be determined by different modes.According to preferred implementation, DC charging cable or method include voltage measuring apparatus, and the voltage measuring apparatus is arranged in second signal line scan pickup coil side and second and connects Between contact, and it is configured to determine and/or measure voltage difference.Voltage measuring apparatus can be integrated in DC charging cable, It is integrated and/or is integrated in charging unit with control device.

In another preferred implementation of DC charging cable or method, signal line is parallel with a conductor in DC conductor And/or it is adjacent to the extension (run) between the first tie point and the second tie point.Preferably, signal line is parallel with DC conductor Ground extends at least some distance.It is highly preferred that signal line and DC conductor extend between the entire extension of DC conductor in parallel, And/or the same or like length including DC conductor.The first tie point being electrically connected between signal line and DC conductor and The mutual distance of two tie points is preferably at least 2,3,4 or 5 m.Distance is longer, can more accurately determine temperature.

In another preferred implementation, DC charging cable or method include second signal route, the second signal route tool There are corresponding first signal wire terminal and corresponding second opposite signal wire terminal, thus

Corresponding first signal wire terminal is connected to another conductor in DC conductor at corresponding first tie point, and thus

About DC charging cable,

Control device be configured to measure corresponding second signal line scan pickup coil side to it is another in the DC conductor far from corresponding first tie point Second voltage between corresponding second tie point of one conductor is poor, with for determining the second temperature of DC charging cable, or Thus

About this method, this method includes the following steps:

Measure corresponding the of corresponding second signal line scan pickup coil side and another conductor in the DC conductor far from corresponding first tie point Second voltage between two tie points is poor, for determining the second temperature of DC charging cable.In such manner, it is possible to more accurately determine Temperature, because determining the voltage difference and/or temperature of two DC conductors.

In another preferred implementation of DC charging cable or method, about DC charging cable, control device is configured to group Measured voltage difference and measured second voltage difference and/or identified temperature and identified second temperature are closed, or About this method, this method includes the following steps: to combine measured voltage difference and measured second voltage difference and/or institute really Fixed temperature and identified second temperature.The mean temperature of calculating measured temperature and second temperature can for example be passed through And/or the average voltage difference of voltage difference and second voltage difference is combined.Alternatively, control device can be configured to individually make With and/or this method both measured voltage difference and measured second voltage difference and/or identified temperature is used alone Both with identified second temperature, such as to determine whether charging needs to be stopped or whether charging current needs to be dropped It is low.

In another preferred implementation of DC charging cable or this method, DC charging cable and/or DC conductor include first End and the second opposite end, the first tie point is at first end, and the second tie point is at second end.Therefore, first and Two tie points are preferably arranged in two opposite extreme ends (utmost end) of DC charging cable and/or DC conductor, thus Allow the accurate determination to voltage difference and/or temperature.

In another preferred implementation, DC charging cable or method include first end or the second opposite end institute of DC charging cable The charge connector being connected to, thus the first tie point is arranged in charge connector.In this way, first is believed for charging cable Number line scan pickup coil side is connected at the first tie point of the limit, being capable of temperature very accurately.Charge connector can be AC connector It is and normal to the variant of IEC type 2 and in this case be referred to as joint coupler with the combination of DC option (DC option) Often it is abbreviated as Combo2.Charge connector is also referred to as electric connector or coupler, and/or can be used as electric vehicle power supply equipment EVSE is provided.Being arranged in charge connector means that electrical connection is integrated in charge connector.

In another preferred implementation of DC charging cable or method, charge connector includes contact pin, is connected to DC conductor and the first tie point of composition.Preferably, each DC conductor is connected to corresponding PIN to charge connector.Preferably, One tie point is arranged in charge connector.

In another preferred implementation, DC charging cable or method include first end or the second opposite end institute of DC charging cable The charging unit being connected to, thus the second tie point is arranged in charging unit.Charging unit is preferably configured for via change Depressor and/or rectifier are connected to AC power grid and/or are used for including transformer and/or rectifier, transformer and/or rectifier Reception and/or converting electrical energy, in order to provide electric vehicle is given, to charge for the battery to electric vehicle.Preferably, electric Pressure measuring device is arranged in charging unit.Charging unit may include multiple DC charging cables, respectively that as discussed previously Sample provides, for charging to different electric vehicles.

In another preferred implementation of DC charging cable or method, about DC charging cable, control device is configured to Measured voltage difference is calibrated for temperature, or about this method, including the following steps: calibrate for temperature measured Voltage difference.The actual temperature of the copper of DC charging cable, DC conductor and/or DC conductor can be with the Two-order approximation of measured voltage Two-order approximation proportional or including measured voltage.Therefore, calibration control device and/or this method and step improve control The precision of device processed and/or this method.

In another preferred implementation of DC charging cable or method, about DC charging cable, control device is configured to survey The electric current of at least one of DC conductor is measured, or about this method, including the following steps: at least one of measurement DC conductor Electric current.Using the measured electric current flowed in DC conductor when charging to electric vehicle together with the electricity of measurement Pressure, can determine the actual resistance of DC conductor.

In another preferred implementation of DC charging cable or method, about DC charging cable, control device is configured to Based on the predetermined resistance under known temperature and/or institute's calibrating resistance based on DC conductor come temperature, or about this method, Include the following steps: based on the predetermined resistance under known temperature and/or institute's calibrating resistance based on DC conductor come temperature.By Change in the resistance of DC conductor with the temperature of DC conductor, so the institute with predetermined resistance and/or DC conductor under known temperature Calibrating resistance combines, and can calculate the actual temperature of the copper of DC conductor and/or DC conductor.

In another preferred implementation of DC charging cable or method, about DC charging cable, control device is configured to ring Temperature measured by Ying Yu controls the charging current of DC conductor, or about this method, including the following steps: in response to being surveyed The temperature of amount and the charging current for controlling DC conductor.During normal charging operation, such as in Europe, DC charging cable can have 18 DEG C of initial temperature rises to up to 40 DEG C during charging.In desert, the temperature of DC charging cable is risen to Up to 70 DEG C.Therefore, in order to avoid the overheat and/or failure of DC charging cable and/or charging unit, control device and/or should Method can reduce the charging current as provided by charging unit when temperature is more than predefined thresholds.Predefined thresholds can be example Such as 50,60 or 70 DEG C, thus reduces and can be -20, -50 or -100% (that is, shutdown charging).(it being capable of conduct for control device Computerized components provide) and/or this method can be configured to just to restore to charge when temperature is reduced under threshold value.In In another realization, control device and/or this method can be configured to control charging current, so that being no more than during charging predetermined Adopted temperature threshold.

In another preferred implementation of DC charging cable or method, DC conductor includes >=25 mm2,50 mm2 or 70 The diameter of mm2, second signal route include≤0.5 mm2, the diameter of 0.7 mm2 or 1 mm2 and/or charging cable, signal Route includes >=4 m, 5 m or 7.5m and≤5 m, the length of 7.5 m or 10 m and/or DC conductor are cooled.For cold But DC conductor is capable of providing cooling device, is preferably arranged at charging unit, and/or be arranged so that cooling fluid from The first end of DC charging cable and/or DC conductor is transmitted to second end, and is hereafter transmitted to first end from second end.DC charging Cable may include additional DC conductor, that is, more than two DC conductor, it can be equipped with corresponding signal route.Therefore, term " packet Include two DC conductors " to be understood to that additional DC conductor is also likely to be present.Preferably, DC conductor and signal line are encapsulated with cable Coating and/or cable cover(ing), to be used to form DC charging cable.It is highly preferred that DC conductor and/or signal line are insulated, and/ Or including insulating coating.

The other embodiments and advantage of this method pass through those skilled in the art from DC charging cable as discussed previously Directly and clearly obtain.

Detailed description of the invention

The aspects of the invention and other aspect will be apparent according to embodiment described below, and referring to Under the embodiment illustrate.

Attached drawing includes:

Fig. 1 illustrates the direct current DC charging cable realized according to demonstration by signal.

Specific embodiment

Fig. 1 illustrates the direct current DC charging cable realized according to demonstration by signal.DC charging cable includes that two DC are led Body 1,2 is used to transmit electric energy between electric vehicle 3 and charging unit 4, and one of DC conductor 1 has positive potential, and another One DC conductor 2 has negative potential.DC charging cable may include other conductors, such as transmitting the PP line close to pilot tone PP signal Road, the CP route for transmitting control pilot tone CP signal and/or the PE route for transmitting PE signal, are not retouched in Fig. 1 It draws.DC conductor 1,2 includes the diameter usually between 25 to 50 mm2, with the typical charge electricity for transmitting usually 500 A Stream.

Charge connector 5 is connected to the first end 6 of DC charging cable, and the second opposite end 7 of DC charging cable is connected to Charging unit 4.In this way, DC charging cable extends between its first end 6 and its second end 7 along the distance of 5 m.Charge connector 5 include contact pin 8, the first end 6 of DC conductor 1,2 is connected to, for being electrically connected electric vehicle 3.

Other than two DC conductors 1,2, DC charging cable further includes two signal lines 9,10 for being portrayed as dotted line, Distance along 5 m is extended parallel to according to insulation mode and DC conductor 1,2.Specifically, referring to Fig.1, upper signal line 9 with it is upper DC conductor 1 extends parallel to, and at its first signal wire terminal 11, at the first tie point 12, at upper contact pin 8 It is connected to DC conductor 1.In a similar way, lower signal line 10 is extended parallel to lower DC conductor 2, and its corresponding Lower DC conductor 2 is connected at one signal wire terminal 11, at corresponding first tie point 12, at corresponding lower contact pin 8.

The opposite signal wire terminal 13 of the second of upper signal line 9 is being arranged in charging unit via voltage measuring apparatus 15 DC conductor 1 is connected at the second tie point 14 in 4.In a similar way, the corresponding second opposite letter of lower signal line 9 Number line scan pickup coil side 13 is connected at corresponding second tie point 14 being arranged in charging unit 4 via relevant voltage measuring device 15 Lower DC conductor 2.In this way, the second tie point 14 is arranged far from the first tie point 12.

Computerization control device 16 is arranged in charging unit 4, and is configured to two second signal routes of measurement Relevant voltage between end 13 and two the second tie points 14 is poor.Control device 16 also measures the charging current of DC conductor 1,2.Base Institute's calibrating resistance of DC conductor 1,2 under known temperature, control device 16 is from measured voltage difference and measures charging current Come determine DC conductor 1,2 and/or conductor 1,2 copper actual temperature.Control device 16 can be combined or be calculated as a result, leads in upper DC It is measured at body 9 and lower conductor 10 and/or to upper DC conductor 9 and the measured voltage difference calculated of lower conductor 10, charging electricity The average of stream and/or temperature.Can also be required of, control device for example by the reference data with voltage difference and temperature into Row relatively carrys out calibration measurement voltage difference to be directed to temperature.

In response to identified temperature, control device 16 can control the charging current of DC conductor 1,2.If DC conductor 1,2 Temperature be more than predefined thresholds, then charging current can reduce some degree or even turn off.For example, charging can be in temperature Stop when more than 70 DEG C, and being capable of the recovery when temperature drops to 50 DEG C.Alternatively, control device 16 can control DC conductor 1, 2 charging current, so that the temperature of DC conductor 1,2 is no more than predefined thresholds.

Although illustrating and describing the present invention in detail in attached drawing and above description, this illustrate and describe is considered It is illustrative or exemplary rather than restrictive；The invention is not limited to the disclosed embodiments.It is attached by studying Figure, disclosure and the accompanying claims book, can exist to other changes of the disclosed embodiments by those skilled in the art Implement to understand and realize in claimed invention.In detail in the claims, other yuan are not precluded in word " comprising " Part or step and indefinite article "a" or "an" are not precluded multiple.It is old in mutually different dependent claims The combination that the fact that state certain measures is not offered as these measures cannot be used to advantage.It is any with reference to symbol in claims Number it is understood not to limitation range.

List of reference characters

1 (on) DC conductor

2 (under) DC conductor

3 electric vehicles

4 charging units

5 charge connectors

6 first ends

7 second opposite ends

8 contact pins

9 (on) signal line

10 (under) signal line

11 first signal wire terminals

12 first tie points

13 second opposite signal wire terminals

14 second tie points

15 measuring devices

16 control devices.