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CN110014959B - Temperature detection method and equipment of charging device and charging device - Google Patents

Temperature detection method and equipment of charging device and charging device Download PDF

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Publication number
CN110014959B
CN110014959B CN201711009585.3A CN201711009585A CN110014959B CN 110014959 B CN110014959 B CN 110014959B CN 201711009585 A CN201711009585 A CN 201711009585A CN 110014959 B CN110014959 B CN 110014959B
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temperature
control box
cable
section
plug
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CN110014959A (en
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陆珂伟
潘志强
汪国康
王飞
吴巍峰
傅杰文
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SAIC Motor Corp Ltd
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SAIC Motor Corp Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The application discloses a temperature detection method and equipment of a charging device and the charging device, wherein the charging device comprises a control box, a plug and a charging gun end, the input end of the control box is connected with the plug through a first section of cable, and the output end of the control box is connected with the charging gun end through a second section of cable; the method comprises the following steps: detecting the temperature Tm of any position on the first section of cable, and obtaining the temperature T of the plug position by using the TmA；TAIs proportional to Tm; detecting the temperature Tn of any position on the second section of cable, and obtaining the temperature T of the charging gun end by utilizing the TnC；TCProportional to Tn; when T isAGreater than a first set temperature, or, TCAnd if the temperature is higher than the second set temperature, determining that the external temperature of the control box is too high. Can reduce the low-voltage pencil between plug and the control box input and the low-voltage pencil between the control box output and the rifle end that charges, reduce electromagnetic interference, the outside temperature of more accurate acquisition control box. When the temperature is too high, the over-temperature prompt can be carried out, so that corresponding over-temperature protection can be carried out in time, and charging faults are prevented.

Description

Temperature detection method and equipment of charging device and charging device
Technical Field
The application relates to the technical field of electric automobiles, in particular to a temperature detection method and equipment for a charging device and the charging device.
Background
The rapid development of electric vehicles must rely on the continuous perfection of charging facilities, charging equipment, technology and markets. The charging equipment comprises equipment such as a charging pile, a charging gun and a vehicle-mounted charger, and the charging equipment is used as a key component of the whole battery power supply system of the electric automobile, and reliability and safety must be considered.
The new national standard charging mode 2 adopts a charging device with a cable-mounted control box to charge the electric automobile, and the charging mode is an indispensable charging mode of the electric automobile. The in-cable control box (in-cable control box) is a device which is installed on the charging connection device near the power supply plug and has at least control functions of connection confirmation, leakage protection and the like.
The charging device with the on-cable control box has a first end connected with an alternating current network end through a plug and a second end connected with an alternating current slow charging port of the electric automobile.
The charging device has the over-temperature condition in the use process, and the charging safety can be influenced when the temperature is too high, so that the charging accident is caused.
Temperature sensing and over-temperature protection for charging devices with on-cable control boxes are technical problems that need to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems in the prior art, the application provides a temperature detection method and device for a charging device, and the charging device, which can accurately detect the temperature of the charging device and warn when the temperature of the charging device is too high.
The embodiment of the invention provides a temperature detection method of a charging device, wherein the charging device comprises a control box, a plug and a charging gun end, wherein the input end of the control box is connected with the plug through a first section of cable, and the output end of the control box is connected with the charging gun end through a second section of cable; the method comprises the following steps:
detecting the temperature Tm of any position on the first section of cable, and obtaining the temperature T of the plug position by using the TmA(ii) a The T isAIs proportional to Tm;
detecting the temperature Tn of any position on the second section of cable, and obtaining the temperature T of the charging gun end by using the TnC(ii) a The T isCProportional to Tn;
when said T isAGreater than a first set temperature, or, TCAnd if the temperature is higher than the second set temperature, determining that the external temperature of the control box is too high.
Preferably, said TAProportional to Tm, specifically: t isATm + m, wherein α and m are both constants;
the T isCProportional to Tn, specifically: t isCβ × Tn + n, where β and n are both constants.
Preferably, the method further comprises the following steps:
detecting the temperature of any position on the first section of cable as Tm and the temperature T of the plug positionADetecting at least two sets of Tm and TAThrough TAObtaining α and m as α + Tm + m;
detecting the temperature of any position on the second section of cable as Tn, and detecting the temperature T of the charging gun endCDetecting at least two groups of Tn and TCThrough TCβ and n are obtained β + Tn.
Preferably, a plurality of α, a plurality of m, a plurality of β and a plurality of n are obtained;
taking the average value of a plurality of alpha as final alpha;
taking the average value of a plurality of m as the final m;
taking the average value of a plurality of beta as final beta;
the average of a plurality of n is taken as the final n.
Preferably, when the external temperature of the control box is determined to be too high, the first LED lamp is controlled to display in a first mode, and the second LED lamp is controlled to display in a second mode.
Preferably, the method further comprises the following steps:
detecting an internal temperature of the control box;
and when the internal temperature is higher than a third set temperature, determining that the internal temperature of the control box is too high.
Preferably, when the temperature in the control box is determined to be too high, the first LED lamp is controlled to display in a third mode, and the second LED lamp is controlled to display in a fourth mode.
The embodiment of the invention also provides temperature detection equipment of the charging device, the charging device comprises a control box, a plug and a charging gun end, the input end of the control box is connected with the plug through a first section of cable, and the output end of the control box is connected with the charging gun end through a second section of cable; the apparatus comprises: a first temperature sensor, a second temperature sensor and a controller;
the first temperature sensor is used for detecting the temperature Tm of any position on the first section of cable;
the second temperature sensor is used for detecting the temperature Tn of any position on the second section of cable;
the controller is used for obtaining the temperature T of the plug position by using the TmA(ii) a The T isAIs proportional to Tm; obtaining the temperature T of the charging gun end by using the TnC(ii) a The T isCProportional to Tn; when said T isAGreater than a first set temperature, or, TCAnd if the temperature is higher than the second set temperature, determining that the external temperature of the control box is too high.
Preferably, the method further comprises the following steps: a first LED lamp and a second LED lamp;
the controller is further used for controlling the first LED lamp to display in a first mode and controlling the second LED lamp to display in a second mode when the external temperature of the control box is determined to be too high.
An embodiment of the present invention further provides a charging device, including: the apparatus described; further comprising: the charging device comprises a control box, a plug and a charging gun end;
the input of control box passes through first section cable junction plug, the output of control box passes through second section cable junction rifle end that charges.
Compared with the prior art, the method has the advantages that:
in the application, the plug position temperature T is obtained by detecting the temperature of any position on the first section of cable between the plug position and the input end of the control boxAThe temperature T of the charging gun end is obtained by detecting the temperature of any position on the second section of cable between the output end of the control box and the charging gun endC. Will TAAnd TCAnd respectively comparing the temperature with the corresponding preset temperature, and judging whether the temperature of two sections of cables outside the control box is too high. Through this application embodiment, can reduce the low pressure pencil between plug to the control box input and control box is defeatedThe low-voltage wire harness between the outlet end and the charging gun end reduces electromagnetic interference and more accurately obtains the temperature outside the control box. When the temperature is too high, the over-temperature prompt can be carried out, so that corresponding over-temperature protection can be carried out in time, and charging faults are prevented.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a charging device with an on-cable control box as provided herein;
fig. 2 is a flowchart illustrating a method for detecting a temperature of a charging device according to an embodiment of the present disclosure;
fig. 3 is a flowchart illustrating an embodiment of a method for detecting a temperature of a charging device according to the present application;
FIG. 4 is a schematic illustration of a temperature status display provided herein;
FIG. 5 is a schematic illustration of another temperature state display provided herein;
fig. 6 is a schematic diagram of a temperature detection device of a charging device provided in the present application;
fig. 7 is a schematic diagram of a charging device provided in the present application.
Detailed Description
In order to make the technical solution of the present application more intuitively understood by those skilled in the art, a charging device with an on-cable control box is described below with reference to fig. 1, and in particular, fig. 1 is a schematic diagram of a charging device with an on-cable control box.
The charging device with the on-cable control box comprises a plug A, a control box B and a charging gun end C.
The input end of the control box B is connected with a plug A through a first section of cable L1, and the plug A can be connected with an alternating current power supply. The output end of the control box B is connected with a charging gun end C through a second section of cable L2, and the charging gun end C is used as a charging port of the electric automobile.
The inventor of the present application has found through research that, for the temperature detection outside the control box of the charging device with the on-cable control box, the temperature of the plug a and the temperature of the charging gun end C are generally detected. This detection method is generally implemented by a temperature sensor fixed at the plug position and the charging gun end, and the sensor feeds back the detected temperature to the control box. The L1 low-voltage wire harness is required to be added to fix the temperature sensor at the plug position, and the L2 low-voltage wire harness is required to be added to fix the temperature sensor at the charging gun end. The addition of the low-voltage wiring harnesses in the sections L1 and L2 can cause large electromagnetic interference, thereby affecting the accuracy of temperature detection. The automobile charging device can not normally alarm when the temperature outside the control box is too high, and can mistakenly report temperature faults when the temperature outside the control box is normal, so that the automobile charging is influenced.
The application provides a temperature detection method and equipment of a charging device and the charging device, which can accurately detect the external temperature of a control box.
It should be noted that the specific type of the plug a may be set according to the actual application requirement, and the following embodiments of the present application do not specifically limit the type of the plug a, and fig. 1 only illustrates three plugs as an example.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
First embodiment
Referring to fig. 2, it is a flowchart of an embodiment of a method for detecting a temperature of a charging device provided in the present application.
The temperature detection method provided by the embodiment is applied to a charging device. The charging device comprises a control box, a plug and a charging gun end, wherein the input end of the control box is connected with the plug through a first section of cable, and the output end of the control box is connected with the charging gun end through a second section of cable. The method comprises the following steps:
s201: and detecting the temperature Tm of any position on the first section of cable, and detecting the temperature Tn of any position on the second section of cable.
The external temperature of the control box comprises two parts, wherein one part is a plug and a part of a cable between the plug and the input end of the control box, and the other part is a cable part between the output end of the control box and the charging gun end. Sensing the temperature outside the control box requires both of these parts. In this embodiment, the detecting the temperature on the first cable section may be detected by a temperature sensor fixed at a position on the first cable section, and the detecting the temperature on the second cable section may be detected by a temperature sensor fixed at a position on the second cable section. It will be appreciated that the closer the temperature sensor is to the control box, the shorter the added low voltage wiring harness.
In practical application, the optimal monitoring points on the first section of cable and the second section of cable can be determined through experimental tests, so that T can be accurately reflected by TmASo that Tn can accurately represent TCThe low-voltage wire harness can be shortened, electromagnetic interference is reduced, and the plug position and the temperature of the charging gun end can be accurately obtained.
S202: obtaining the temperature T of the plug position using TmAObtaining the temperature T of the charging gun end by using TnC. Wherein, TAProportional to Tm, TCProportional to Tn.
In this example, Tm and T are passedAThe relationship between them gives TA. It can be understood that TAProportional to Tm, the higher the temperature of the cable from the plug to the input of the control box, the higher the temperature of the corresponding plug location; the lower the temperature of the cable between the plug to the input of the control box, the lower the temperature of the corresponding plug location.
By Tn and TCObtaining T from the relationship ofC. It can be understood that TCProportional to Tn, from the output terminal of the control box to the charging gun terminalThe higher the temperature of the cable between, the higher the temperature of the corresponding rifle end that charges also can be, the lower the temperature of the cable between control box output end to the rifle end that charges, the lower the temperature of the corresponding rifle end that charges also can be.
S203: when T isAGreater than a first predetermined temperature or TCAnd when the temperature is higher than the second preset temperature, determining that the external temperature of the control box is too high.
The first preset temperature is the temperature allowed by the safety range of the plug position when T isAWhen the temperature is less than or equal to the first preset temperature, the charging process of the charging device is not influenced, and when T is less than or equal to the first preset temperatureAWhen the temperature exceeds the first preset temperature, the normal charging of the automobile by the charging device may be affected, and even the charging device may be damaged.
The second preset temperature is the temperature allowed by the safety range of the charging gun end when T is reachedCWhen the temperature is less than or equal to the second preset temperature, the charging device can be charged normally, the temperature cannot influence the charging process of the charging device, and when T is less than or equal to the second preset temperatureCWhen the temperature reaches or exceeds the second preset temperature, the charging device may be influenced to normally charge the automobile, and even the charging device may be damaged.
At TAAnd TCCan ensure that the charging device works in a normal state T without exceeding the corresponding preset temperatureAAnd TCIf one of the temperatures exceeds the corresponding preset temperature, the external temperature of the control box is considered to be too high.
For example: temperature T of plug positionAGreater than a first preset temperature, the temperature T of the charging gun endCAnd when the temperature is lower than the second preset temperature, the external temperature of the control box is considered to be too high. For example: temperature T of plug positionALess than the first preset temperature, the temperature T of the charging gun endCAnd if the temperature is higher than the second preset temperature, the external temperature of the control box is considered to be too high. For example: temperature T of plug positionAGreater than a first preset temperature, the temperature T of the charging gun endCAnd if the temperature is higher than the second preset temperature, the external temperature of the control box is considered to be too high.
In this embodiment, the position of the plug is detected to the input end of the control boxObtaining plug position temperature T from temperature of any position on a section of cableAThe temperature T of the charging gun end is obtained by detecting the temperature of any position on the second section of cable between the output end of the control box and the charging gun endC. Will TAAnd TCAnd respectively comparing the temperature with the corresponding preset temperature to judge whether the temperature outside the control box is too high. Through this embodiment, can reduce the low pressure pencil between plug to the control box input and the control box output to the low pressure pencil between the rifle end that charges, reduce electromagnetic interference, more accurate obtains the outside temperature of control box, when the high temperature, can carry out the suggestion of excess temperature to in time carry out corresponding excess temperature protection, prevent to take place the trouble of charging.
Second embodiment
Referring to fig. 3, which is a flowchart illustrating an embodiment of a method for detecting a temperature of a charging device according to the present application.
The temperature detection method provided by the embodiment comprises the following steps:
s301: and detecting the temperature Tm of any position on the first section of cable, and detecting the temperature Tn of any position on the second section of cable.
S302: obtaining the temperature T of the plug position using TmAObtaining the temperature T of the charging gun end by using TnC. Wherein, TATm + m, both α and m being constants, TCβ × Tn + n, β and n are constants.
It will be appreciated that the temperature T of the plug locationAHas a quantitative relation with the temperature Tm of the first cable section, and generally speaking, the higher the temperature of the first cable section is, the higher the temperature T of the corresponding plug positionAThe higher, TAAnd Tm is in direct proportion. Likewise, TCAnd Tn are also proportional.
It should be noted that the constants α, m, β, and n are obtained by pre-calibration, and the specific calibration process is described below with reference to fig. 1. The specific calibration process comprises the following steps:
according to the formula TAIf two parameters α and m need to be calculated, two sets of T need to be measured, as can be seen by α Tm + mAAnd Tm can yield the numbers of α and mThe value is obtained. In the embodiment of the present application, the calibration method that can be adopted is: detecting temperature T of two sets of plug positionsAAnd temperatures Tm on the two sets of LI section cables, where the temperature at a point on the L1 section cable can be measured as Tm, calculated as α and m. In order to make the values of α and m more accurate and reliable, the present embodiment may employ detecting the temperature T of more than two sets of plug positionsAAnd the temperature Tm at a point on the L1 section cable, taken as the average of α and m. It will be appreciated that the temperature detection point on the first cable section can be identified from the fixed position of the temperature sensor in actual use.
For example: detecting for the first time and recording the temperature T of the plug positionA1Recording the temperature Tm1 at point 1 on the L1 section of cable; detecting for the second time and recording the temperature T of the plug positionA2The temperature Tm2 at point 1 on the L1 length of cable was recorded. Detecting for the third time and recording the temperature T of the plug positionA3Recording the temperature Tm3 at point 1 on the L1 section of cable; detecting for the fourth time and recording the temperature T of the plug positionA4The temperature Tm4 at point 1 on the L1 length of cable was recorded. And calculating a plurality of groups of values alpha and m according to the detected four groups of data in a pairwise combination mode. Specifically, the method comprises the following steps:
Figure BDA0001445179990000071
Figure BDA0001445179990000072
from the above combinations, α 1, α 2, α 3, α 4, α 5, α 6, and m1, m2, m3, m4, m5, m6 can be derived. The parameters α and m may be derived by averaging. Namely:
Figure BDA0001445179990000081
of course, in the calibration process, it is not necessary to combine the measured multiple groups two by two to obtain corresponding α and m, and other methods may be used to obtain multiple groups of α and m. For example, four groups of T are detectedAAnd after Tm, α 1 and m1 were calculated using the first two groups, α 2 and m2 were calculated using the last two groups, α being the average of α 1 and α 2, and m being the average of m1 and m 2. Of course, other combinations may be used to obtain multiple sets of α and m values, and finally, the average value of the multiple sets of α and m may be used as the final parameter. The embodiment of the present application does not limit the manner of obtaining the multiple sets of α and m. It can be understood that the plug position and the charging gun end are not fixed with temperature sensors, and the temperature of the plug position and the temperature of the charging gun end can be detected by temperature detection equipment in the calibration process.
Considering that the rifle that charges when in actual use may use under different environment, the service environment of rifle that charges is different, and the cable heat dissipation condition also can be different, so the cable temperature also has difference. Therefore, the parameters α and m corresponding to different use environments are different, so that in actual calibration, calibration can be performed at different temperatures respectively to obtain the parameters α and m corresponding to different temperatures. For example, the corresponding parameters α and m are respectively calibrated at-5 deg.C, 0 deg.C, 5 deg.C, 10 deg.C, 15 deg.C, 20 deg.C, 25 deg.C, and 30 deg.C. For the parameter between two adjacent ambient temperatures, it can be solved by a linear difference. For example, after the parameters corresponding to 20 ℃ and 25 ℃ are calibrated, the parameter corresponding to 23 ℃ can be calculated according to the parameters corresponding to 20 ℃ and 25 ℃. When the external temperature of the control box is actually measured, the corresponding calibration parameters can be adopted for calculation according to different environmental temperatures.
It should be noted that α and m, and β and n, which are specified at different ambient temperatures, may be stored, for example, a comparison between α and m, and β and n, and the temperature may be stored. When the charging gun is actually used, the initial temperature detected by the temperature sensor is the current ambient temperature, so that alpha, m, beta and n at the ambient temperature can be found by inquiring the comparison relation, and then the temperature correction algorithm T is usedATm + m and TC＝β*Tn+n。
The calibration process of the parameters β and n is similar to the calibration process of the parameters α and m, and the specific calibration process may refer to the specific description part of the calibration process of the parameters α and m, which is not described in detail herein.
S303: when T isAGreater than a first predetermined temperature or TCAnd when the temperature is higher than the second preset temperature, determining that the external temperature of the control box is too high.
And after the temperature of the plug position is calculated according to the temperature correction algorithm, comparing the temperature with a first preset temperature which is the temperature allowed by the safety range of the plug position, and if the calculated temperature of the plug position is higher than the first preset temperature, determining that the external temperature of the control box is overhigh. Similarly, the temperature of the charging gun end is calculated according to a temperature correction algorithm, the calculated temperature is compared with the temperature allowed by the safety range of the charging gun end, namely the second preset temperature, and if the calculated temperature of the charging gun end is higher than the second preset temperature, the external temperature of the control box is considered to be too high.
S304: detecting the internal temperature T of the control boxB。
It can be understood that the normal charging of the vehicle may be affected by an excessive temperature outside the control box or inside the control box. Therefore, in addition to detecting the temperature outside the control box, the temperature inside the control box can be detected. Specifically, the internal temperature of the control box can be obtained through a temperature sensor, and can also be obtained through detection of other temperature detection devices, and the specific mode for detecting the internal temperature of the control box is not limited in the application.
It should be noted that step S304 is a step added to the original method for detecting the external temperature of the control box, but the execution sequence of step S304 is not limited in the embodiment of the present application. For example, S304 may be executed before S303, or may be executed simultaneously with any of steps S301, S302, and S303.
S305, judging TBAnd when the temperature is higher than the third preset temperature, the internal temperature of the control box is judged to be too high.
The third preset temperature is the temperature allowed by the safety range inside the control box, and when the detected temperature inside the control box exceeds the third preset temperature, the temperature inside the control box is considered to be too high, so that the normal work of the charging device can be influenced, and the automobile cannot be charged normally.
It should be noted that step S305 needs to be executed after step S304, that is, after the temperature T inside the control box is detectedBThe relationship between the temperature and the third predetermined temperature can be determined. It is understood that there is no sequential limitation between step S305 and steps S301, S302, S303. The specific execution steps can be adaptively adjusted according to actual situations, and the order is not limited in the embodiment of the present application.
In the embodiment of the application, firstly, the relation parameters alpha and m of the temperature of the plug position and the temperature of the first section of cable, and the relation parameters beta and n of the temperature of the charging gun end and the temperature of the second section of cable are calibrated through a calibration algorithm. After the parameters are calibrated, a temperature correction algorithm is determined. The temperature T of the plug position is calculated by detecting the temperature of any position on the first section of cable and utilizing a temperature correction algorithmACalculating the temperature T of the charging gun end by detecting the temperature of any position on the second section of cable and utilizing a temperature correction algorithmC. Will TAAnd TCAnd respectively comparing the temperature with the corresponding preset temperature to judge whether the temperature outside the control box is too high. Because the calibration process of the parameters alpha and m and beta and n adopts a mode of multiple evaluation and averaging, and determines the parameter adaptive to the ambient temperature, the accurate temperature correction algorithm can be obtained. Through this embodiment, can reduce the low-voltage pencil between plug to the control box input and the control box output to the low-voltage pencil between the rifle end that charges, reduce electromagnetic interference, the outside temperature of more accurate acquisition control box. In addition, the step of detecting the internal temperature of the control box is added in the embodiment, the internal temperature of the control box is compared with a third preset temperature, and whether the internal temperature of the control box is higher or not is judged. In the present embodiment, the temperature of the entire charging device is obtained by detecting both the temperature outside the control box and the temperature inside the control box. When the temperature is too high, the over-temperature prompt can be carried out, so that corresponding over-temperature protection can be carried out in time, and charging faults are prevented.
Third embodiment
The second embodiment of the application provides a method for judging the overhigh temperature inside the control box and the overhigh temperature outside the control box, and the method considers that the temperature of the charging device is overhigh in practice and needs to be processed in time, so that the self damage of the charging device or the damage to the vehicle being charged caused by the overhigh temperature of the charging device is avoided. This application still shows charging device different temperature state.
It should be noted that the LED lamp used in the embodiment of the present application may be a single-color LED lamp or a dual-color LED lamp, and the type of the LED lamp is not limited in the embodiment of the present application.
It should be noted that in the embodiment of the present application, two LED lamps are used to represent the temperature and other faults of the charging device, or a plurality of LED lamps may be used, for example, 3 LED lamps, 4 LED lamps, and the like may be used. The embodiment of the present application does not limit this feature.
The following three temperature state display modes are each explained by using two-color LED lamps.
A first temperature state display manner, see fig. 4, and fig. 4 is a schematic temperature state display diagram provided in the present application.
And when the external temperature of the control box is determined to be overhigh, the first LED lamp is controlled to display in the first display mode, and the second LED lamp is controlled to display in the second display mode. In the embodiment of the present application, the display modes of the first LED lamp and the second LED lamp are not limited. The first display mode and the second display mode may be the same or different.
For example, when the temperature of the cable outside the control box is too high, the first LED lamp is turned off, and the second LED lamp is turned on normally. For example, when the external temperature of the control box is too high, the first LED lamp is always on, and the second LED lamp flickers. For example, when the external temperature of the control box is too high, the first LED lamp flashes in red and the second LED lamp always lights in red. Of course, the first LED lamp and the second LED lamp may also be displayed in other display modes. The embodiments of the present application do not limit this feature. In the display mode, the display modes of two LED lamps are used for distinguishing whether the temperature of the cable outside the control box is over-temperature or not.
It can be understood that, in the use process of the charging device, if the outside of the control box is over-temperature, the over-temperature part needs to be positioned at the first time, and faults are eliminated in time. In this embodiment, whether the plug position temperature or the charging gun end temperature is over-temperature can be distinguished by different combination display modes of the first LED lamp and the second LED lamp. For example, when the temperature of the plug position is over-temperature, the first LED lamp is turned off, and the second LED lamp flashes in red; when the temperature of the charging gun end is over-temperature, the first LED lamp flashes in red, and the second LED lamp is turned off; when the plug position and the charging gun end are both over-temperature, the first LED lamp and the second LED lamp are both red and twinkle.
A second temperature state display manner, see fig. 5, and fig. 5 is another temperature state display schematic diagram provided by the present application.
And when the internal temperature of the control box is determined to be overhigh, the first LED lamp is controlled to display in a third display mode, and the second LED lamp is controlled to display in a fourth display mode. In the embodiment of the present application, the display modes of the first LED lamp and the second LED lamp are not limited. The third display mode and the fourth display mode may be the same or different.
For example, when the temperature inside the control box is too high, the first LED lamp is turned off, and the second LED lamp flickers intermittently. For example. When the temperature in the control box is too high, the first LED lamp red light is normally on, and the second LED lamp red light flickers. For example, when the temperature inside the control box is too high, the first LED lamp flashes in red and the second LED lamp always lights in red. Of course, the first LED lamp and the second LED lamp may also be displayed in other display modes. The embodiments of the present application do not limit this feature. In this display mode, the presence or absence of an excessive temperature in the control box is discriminated by the display mode of the two LEDs.
The combination of the first display mode and the second display mode may be the same as or different from the combination of the third display mode and the fourth display mode, and the four display modes are not limited in the present application.
The third temperature state display mode is shown in table 1 below. In another temperature status display manner provided by the application, the temperature conditions of the cables inside and outside the control box can be embodied by utilizing different display mode combinations of the two LED lamps.
TABLE 1
Figure BDA0001445179990000121
The first LED lamp and the second LED lamp are displayed in corresponding modes corresponding to different conditions of the external temperature of the control box and the internal temperature of the control box. It should be noted that, in the embodiment of the present application, the combination of the display modes of the two LED lamps in a specific case is not limited.
For example, in the above table, when the outside temperature of the control box is normal and the inside temperature of the control box is also normal, the display states of the first LED lamp and the second LED lamp are both green and always on, and in the embodiment of the present application, the first LED lamp and the second LED lamp may be in other display modes. For example, the first LED lamp flashes in green and the second LED lamp flashes in green, and other display modes may be used.
It is to be understood that, for the four cases 1, 2, 3, and 4 in the above table, the display modes of the first LED lamp and the second LED lamp corresponding to each case are not limited, but the display modes of the first LED lamp and the second LED lamp corresponding to the four cases 1, 2, 3, and 4 in the above table should be different in combination because the temperature inside the temperature control box is represented by the display modes of the first LED lamp and the second LED lamp.
It is understood that, for example, corresponding to the two cases of serial No. 2 and serial No. 3 in the above table, if the display mode of the first LED lamp and the display mode of the second LED lamp correspond to the two cases of red light blinking, there is no way to determine whether the temperature inside the control box is too high or the temperature outside the control box is too high according to the display conditions of the two LED lamps when the user sees that the first LED lamp and the second LED lamp are red light blinking.
It should be noted that, in the present application, the display mode combinations of the two LED lamps may be various, and besides the display mode combinations are used for displaying the temperature condition of the charging device, other faults of the charging device, such as an external electrical fault of the charging device, an internal electrical fault of the charging gun, and the like, may also be displayed through other display mode combinations of the two LED lamps.
In the embodiment of the application, the temperature detection information of the charging device is directly expressed in the form of the LED lamp, so that a user can visually obtain the temperature information of the charging device.
Fourth embodiment
The present application further provides a temperature detection device of a charging device, as shown in fig. 6, which is a schematic diagram of the temperature detection device of the charging device provided in the present application. The charging device temperature detection apparatus includes: a first temperature sensor 610, a second temperature sensor 620, and a controller 630.
The first temperature sensor 610 is used for detecting the temperature Tm at any position on the first cable section.
And a second temperature sensor 620 for detecting the temperature Tn at any position on the second cable section.
The controller 630: for obtaining the temperature T of the plug position by using the temperature Tm of any position on the first section of cableA(ii) a The T isAIs proportional to Tm; the temperature Tn of any position on the second section of cable detected by the second temperature sensor 620 is used for obtaining the temperature T of the charging gun endC(ii) a The T isCProportional to Tn; when said T isAGreater than a first set temperature, or, TCAnd if the temperature is higher than the second set temperature, determining that the external temperature of the control box is too high.
Optionally, the apparatus further comprises a first LED lamp 640 and a second LED lamp 650.
The first LED lamp and the second LED lamp show the temperature of the charging device and other fault conditions of the charging device through different display states, and for specific description, reference is made to the description of relevant parts in the third embodiment of the present application, which is not described herein again.
In this embodiment, the temperature Tm at any position on the first cable section is detected by the first temperature sensor, and the temperature Tn at any position on the second cable section is detected by the second temperature sensor. The controller obtains the temperature T of the plug position according to TmAObtaining the temperature T of the charging gun end according to TnC. Will TAAnd TCAnd respectively comparing the temperature with the corresponding preset temperature to judge whether the external temperature of the control box is too high. Through this embodiment, can reduce the low-voltage pencil between plug to the control box input and the control box output to the low-voltage pencil between the rifle end that charges, reduce electromagnetic interference, the outside temperature of more accurate acquisition control box. And the temperature detection information of the charging device is directly expressed in the form of the LED lamp, so that the temperature information of the charging device can be intuitively obtained by a user.
Fifth embodiment
The present application further provides a charging device, see fig. 7, which is a schematic diagram of the charging device provided in the present application. The device comprises a plug A, a control box B and a charging gun C.
The plug A is connected with the input end of the control box B through a section of cable, and the plug connection can be an alternating current network end.
And the charging gun C is connected with the output end of the control box B through a section of cable, and the charging gun is used as a charging port of the electric automobile.
The charging apparatus further includes a temperature detection device as shown in fig. 6. For a description of the temperature detection device, reference is made to the description of the fourth embodiment of the present application, which is not repeated herein.
The charging device that this application embodiment provided can realize charging device self temperature detection to show the temperature testing result through the form of LED lamp, when charging device high temperature, handle the trouble as early as possible, avoid because charging device's high temperature and the charging device self that brings damages and other harmful effects. And the user can intuitively obtain the temperature information of the charging device through the LED lamp display.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application in any way. Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application. Those skilled in the art can now make numerous possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the claimed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the protection scope of the technical solution of the present application without departing from the content of the technical solution of the present application.

Claims (10)

1. The temperature detection method of the charging device is characterized in that the charging device comprises a control box, a plug and a charging gun end, wherein the input end of the control box is connected with the plug through a first section of cable, and the output end of the control box is connected with the charging gun end through a second section of cable; the method comprises the following steps:
detecting the temperature Tm of any position on the first section of cable, and obtaining the temperature T of the plug position by using the TmA(ii) a The T isAIs proportional to Tm;
detecting the temperature Tn of any position on the second section of cable, and obtaining the temperature T of the charging gun end by using the TnC(ii) a The T isCProportional to Tn;
when said T isAGreater than a first set temperature, or, TCAnd if the temperature is higher than the second set temperature, determining that the external temperature of the control box is too high.
2. The temperature detection method according to claim 1, wherein T isAProportional to Tm, specifically: t isATm + m, wherein α and m are both constants;
the T isCProportional to Tn, specifically: t isCβ × Tn + n, where β and n are both constants.
3. The temperature detection method according to claim 2, further comprising:
detecting the temperature of any position on the first section of cable as Tm and the temperature T of the plug positionADetecting at least two sets of Tm and TAThrough TAObtaining α and m as α + Tm + m;
detecting the temperature of any position on the second section of cable as Tn, and detecting the temperature T of the charging gun endCDetecting at least two groups of Tn and TCThrough TCβ and n are obtained β + Tn.
4. The temperature detection method according to claim 3, wherein a plurality of α, a plurality of m, a plurality of β, and a plurality of n are obtained;
taking the average value of a plurality of alpha as final alpha;
taking the average value of a plurality of m as the final m;
taking the average value of a plurality of beta as final beta;
the average of a plurality of n is taken as the final n.
5. The temperature detecting method according to any one of claims 1 to 4, wherein when it is determined that the temperature outside the control box is too high, the first LED lamp is controlled to display in the first mode, and the second LED lamp is controlled to display in the second mode.
6. The method of claim 1, further comprising:
detecting an internal temperature of the control box;
and when the internal temperature is higher than a third set temperature, determining that the internal temperature of the control box is too high.
7. The method according to claim 6, wherein when the temperature inside the control box is determined to be too high, the first LED lamp is controlled to display in a third mode, and the second LED lamp is controlled to display in a fourth mode.
8. The temperature detection equipment of the charging device is characterized by comprising a control box, a plug and a charging gun end, wherein the input end of the control box is connected with the plug through a first section of cable, and the output end of the control box is connected with the charging gun end through a second section of cable; the apparatus comprises: a first temperature sensor, a second temperature sensor and a controller;
the first temperature sensor is used for detecting the temperature Tm of any position on the first section of cable;
the second temperature sensor is used for detecting the temperature Tn of any position on the second section of cable;
the controller is used for obtaining the temperature T of the plug position by using the TmA(ii) a The T isAIs proportional to Tm; obtaining the temperature T of the charging gun end by using the TnC(ii) a The T isCProportional to Tn; when said T isAGreater than a first set temperature, or, TCAnd if the temperature is higher than the second set temperature, determining that the external temperature of the control box is too high.
9. The apparatus of claim 8, further comprising: a first LED lamp and a second LED lamp;
the controller is further used for controlling the first LED lamp to display in a first mode and controlling the second LED lamp to display in a second mode when the external temperature of the control box is determined to be too high.
10. A charging device, comprising: the apparatus of any one of claims 8-9; further comprising: the charging device comprises a control box, a plug and a charging gun end;
the input of control box passes through first section cable junction plug, the output of control box passes through second section cable junction rifle end that charges.
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