CN116766980B - Liquid cooling heat dissipation charging pile for liquid leakage early warning and early warning method - Google Patents
Liquid cooling heat dissipation charging pile for liquid leakage early warning and early warning method Download PDFInfo
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- CN116766980B CN116766980B CN202311039893.6A CN202311039893A CN116766980B CN 116766980 B CN116766980 B CN 116766980B CN 202311039893 A CN202311039893 A CN 202311039893A CN 116766980 B CN116766980 B CN 116766980B
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- 239000007788 liquid Substances 0.000 title claims abstract description 208
- 238000001816 cooling Methods 0.000 title claims abstract description 95
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000110 cooling liquid Substances 0.000 claims abstract description 178
- 230000003068 static effect Effects 0.000 claims description 26
- 238000012544 monitoring process Methods 0.000 claims description 9
- 239000012809 cooling fluid Substances 0.000 claims 2
- 239000002826 coolant Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
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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
- B60L53/30—Constructional details of charging stations
- B60L53/302—Cooling of charging equipment
-
- 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
- B60L53/60—Monitoring or controlling charging stations
-
- 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
- Y02T90/12—Electric charging stations
Abstract
The invention belongs to the technical field of electric automobile charging piles, and particularly relates to a liquid cooling heat dissipation charging pile for liquid leakage early warning and an early warning method, wherein the liquid cooling heat dissipation charging pile comprises: the device comprises at least one heat conduction module, a heat exchange module, a plurality of pressure sensors and a main controller, wherein the main controller receives the temperature value data of the cooling liquid in real time, compares the temperature value data and sends out a control signal; meanwhile, the liquid level height data and the liquid pressure data of the cooling liquid are received in real time, and corresponding instructions are made according to the comparison result. The liquid cooling heat dissipation charging pile provided by the invention has high heat dissipation efficiency, is not in contact with electronic components, is safer in heat dissipation process, is also provided with a liquid leakage early warning function, and ensures the safety of the charging pile in the use process.
Description
Technical Field
The invention belongs to the technical field of electric automobile charging piles, and particularly relates to a liquid cooling heat dissipation charging pile for liquid leakage early warning and an early warning method.
Background
The electric automobile fills electric pile and has obtained rapid development as one of the infrastructure supporting facilities of new energy automobile.
The electric automobile fills electric pile and can produce a large amount of heat in the use, if these heat can not in time discharge just can't cool down to filling electric pile, this can bring serious potential safety hazard. Most of charging piles in the current market adopt an air cooling heat dissipation or liquid cooling heat dissipation mode for heat dissipation treatment. However, the air cooling heat dissipation efficiency is low, the inside of the charging pile cannot be cooled in time under the external high-temperature environment, and the air cooling heat dissipation can bring external factors such as dust, corrosive gas, moisture and the like to the inside of the charging pile, so that the safety inside the charging pile is affected. The liquid cooling heat dissipation efficiency is higher than the forced air cooling heat dissipation, but along with the long-time use of components and parts, the liquid cooling heat dissipation can make components and parts appear wearing and ageing phenomena to and appear the coolant liquid and reveal scheduling problem, be unfavorable for charging pile's safe handling.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the liquid cooling heat dissipation charging pile and the liquid cooling heat dissipation charging method for the liquid leakage early warning, which aim to perform high-efficiency liquid cooling heat dissipation on the charging pile, simultaneously have the liquid leakage early warning function and improve the safety of the charging pile in the use process.
According to the invention, by setting two working modes, when the actual temperature of the cooling liquid is lower than a built-in temperature threshold value, the main controller operates the first working mode, so that the circulating pump and the cooling fan operate at constant power and rotation speed; when the actual temperature of the cooling liquid is higher than the built-in temperature threshold value, the main controller operates in a second working mode, so that the circulating pump and the cooling fan operate at actual power and actual rotating speed, and the efficient heat dissipation of the cooler in different temperature ranges is facilitated; meanwhile, the liquid leakage early warning function of the liquid cooling heat dissipation charging pile is realized by combining the static pressure liquid level meter and the pressure sensor, the liquid leakage position information can be displayed in real time, once the liquid leakage phenomenon of the cooling liquid circulation pipeline is monitored, the power supply can be directly stopped, the liquid leakage position information is displayed on the charging pile display panel, and the problem that the liquid leakage position is undefined is solved.
The invention provides a liquid cooling heat dissipation charging pile for liquid leakage early warning, which comprises a charging pile main body and further comprises:
the heat conduction module is arranged in the charging pile main body, each heat conduction module comprises a circulating pump and a heat conduction box which are communicated through a closed cooling liquid circulating pipeline, a plurality of heat conduction loops are arranged in the heat conduction box, a charging module is arranged at the middle position of each two adjacent heat conduction loops, the charging module is cooled by cooling liquid which circularly flows in the heat conduction loops, and in addition, a temperature sensor is arranged at the position of a liquid outlet of the heat conduction box and used for monitoring the temperature value of the cooling liquid in real time;
the heat exchange module is arranged below the heat conduction modules and communicated with each heat conduction module through a cooling liquid circulation pipeline, wherein the heat exchange module comprises a cooling liquid tank, a cooling fan and a static pressure liquid level meter, wherein the cooling liquid tank, the cooling fan and the static pressure liquid level meter are communicated with the cooling liquid circulation pipeline, and the static pressure liquid level meter is used for monitoring the liquid level height value of the cooling liquid in real time;
the pressure sensors are uniformly distributed on the inner side of the pipe wall of the cooling liquid circulation pipeline at equal intervals and are used for monitoring the pressure value of the cooling liquid in the cooling liquid circulation pipeline in real time;
the main controller is arranged in the charging pile main body, receives the temperature value data of the cooling liquid monitored by the temperature sensor in real time, compares the temperature value data with a temperature threshold value arranged in the main controller, and sends out control signals for controlling the circulating pump and the cooling fan; meanwhile, the liquid level height data of the cooling liquid and the liquid pressure value data of the cooling liquid monitored by the static pressure liquid level meter and the pressure sensor are received in real time, the liquid level height data of the cooling liquid is compared with a liquid level height threshold value arranged in the main controller, and if the liquid level height data of the cooling liquid received by the main controller is higher than the liquid level height threshold value arranged in the main controller, the main controller clears the liquid level height data of the cooling liquid synchronously received; if the liquid level height value data of the cooling liquid received by the main controller is lower than the built-in liquid level height threshold value, the main controller invokes the synchronously received liquid level value data of the cooling liquid to be compared with the built-in pressure threshold value in the main controller, judges the liquid leakage position and sends out an early warning signal.
Preferably, a display panel is further arranged outside the charging pile body and used for displaying specific leakage position information in the cooling liquid circulation pipeline sent by the main controller.
Preferably, 3 heat conducting loops are arranged in each heat conducting box, the heat conducting loops are distributed in a serpentine shape in the heat conducting boxes, and a plurality of protruding heat conducting blocks are uniformly distributed in each heat conducting loop at equal intervals.
Preferably, the front side of the cooling liquid tank is provided with a radiating fin, and the front side of the radiating fin corresponds to the radiating fan.
Preferably, the front and rear of the cooling fan are respectively provided with a front filter screen and a rear filter screen, and the front filter screen and the rear filter screen are respectively provided with a plurality of uneven heat dissipation holes, and the front filter screen, the cooling fan and the rear filter screen are integrated and embedded into the front cover plate of the charging pile main body.
Preferably, a first working mode and a second working mode are arranged in the main controller, wherein the first working mode is a working mode in which the temperature value of the cooling liquid monitored by the temperature sensor in real time is lower than a built-in temperature threshold value Tt, the circulating pump operates at constant power Pe in the first working mode, and the cooling fan rotates at constant rotating speed Re; the second working mode is a working mode that the temperature value of the cooling liquid monitored by the temperature sensor in real time is higher than the built-in temperature threshold value Tt, the circulating pump operates at the actual power Pa under the second working mode, the cooling fan rotates at the actual rotating speed Ra, and the actual power Pa of the circulating pump has the following calculation formula:
，
，
wherein Pa represents the actual power of the circulating pump in the second working mode, pe represents the constant power of the circulating pump in the first working mode, kp represents the power gain of the circulating pump, ta represents the actual temperature of the cooling liquid at the liquid outlet of the heat conducting box, and Tt represents the built-in temperature threshold;
the actual rotation speed Ra of the cooling fan is calculated as follows:
，
，
wherein Ra represents the actual rotation speed of the cooling fan in the second working mode, re represents the constant rotation speed of the cooling fan in the first working mode, kr represents the rotation speed gain of the cooling fan, ta represents the actual temperature of the cooling liquid at the liquid outlet of the heat conducting box, and Tt represents the built-in temperature threshold value.
Preferably, the cooling liquid circulation pipeline comprises a first circulation pipeline, a second circulation pipeline and a third circulation pipeline, the circulation pump is communicated with the heat conduction box through the first circulation pipeline, the heat conduction box is communicated with the cooling liquid box through the second circulation pipeline, and the cooling liquid box is communicated with the circulation pump through the third circulation pipeline.
Preferably, the display panel, the charging module, the temperature sensor, the static pressure liquid level meter, the pressure sensor, the circulating pump and the cooling fan are electrically connected with the main controller.
The invention also provides a liquid cooling heat dissipation charging pile early warning method for liquid leakage early warning, which is applied to the liquid cooling heat dissipation charging pile for liquid leakage early warning, and comprises a temperature early warning method and a liquid leakage early warning method, wherein the temperature early warning method comprises the following specific steps:
s11: when the charging pile starts to be used, the main controller operates a first working mode;
s12: the temperature sensor monitors the temperature value of the cooling liquid in real time, and the main controller receives the data of the temperature value of the cooling liquid monitored by the temperature sensor in real time and compares the data with a built-in temperature threshold value;
s13: if the received cooling liquid temperature value data is lower than the built-in temperature threshold value, returning to the step S11, and continuously operating the first working mode by the main controller to control the circulating pump and the cooling fan to operate at constant power and constant rotating speed;
s14: if the received cooling liquid temperature value data is higher than the built-in temperature threshold value, the main controller operates a second working mode, controls the circulating pump and the cooling fan to operate at actual power and actual rotating speed, and returns to the step S12 to continuously monitor the actual temperature of the cooling liquid in real time until the cooling liquid temperature value data received by the main controller again is lower than the built-in temperature threshold value, and the main controller operates the first working mode again, and circulates in this way until the charging pile stops being used;
the liquid leakage early warning method specifically comprises the following steps:
s21: when the charging pile starts to be used, the static pressure liquid level meter monitors the liquid level height value of the cooling liquid in real time, and the pressure sensor monitors the liquid pressure value of the cooling liquid in real time;
s22: the main controller receives the liquid level height data of the cooling liquid and the liquid pressure data of the cooling liquid monitored by the static pressure liquid level meter and the pressure sensor in real time, and compares the received liquid level height data of the cooling liquid with a built-in liquid level height threshold value;
s23: if the received liquid level height value data of the cooling liquid is higher than the built-in liquid level height threshold value, the main controller clears the synchronously received liquid level pressure value data of the cooling liquid and returns to the step S21;
s24: if the received liquid level height value data of the cooling liquid is lower than the built-in liquid level height threshold value, the main controller invokes the synchronously received liquid level value data of the cooling liquid to be compared with the built-in pressure threshold value, judges the liquid leakage position and sends out an early warning signal.
Preferably, in step S24, the coolant pressure value data in the first operation mode is compared with a built-in first operation mode pressure threshold value, and the coolant pressure value data in the second operation mode is compared with a built-in second operation mode pressure threshold value.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, by setting two working modes, when the actual temperature of the cooling liquid is lower than a built-in temperature threshold value, the main controller operates the first working mode, so that the circulating pump and the cooling fan operate at constant power and rotation speed; when the actual temperature of the cooling liquid is higher than the built-in temperature threshold value, the main controller operates in a second working mode, so that the circulating pump and the cooling fan operate at actual power and actual rotating speed, and efficient heat dissipation of the cooler in different temperature ranges is facilitated.
2. According to the invention, the cooling liquid only circularly flows in the sealed heat conduction loop and is not in direct contact with the charging module and other electronic components, so that the safety of liquid cooling heat dissipation is improved, and the practical service life of the electronic components is effectively prolonged; meanwhile, the heat conducting blocks are arranged in the heat conducting loop at equal intervals, so that a larger contact area is formed between the cooling liquid and the inside of the heat conducting box when the cooling liquid circularly flows, heat can be transferred better, and the heat conducting efficiency is effectively improved.
3. The charging pile disclosed by the invention is provided with a leakage early warning function by combining the static pressure liquid level meter and the pressure sensor, can display leakage position information in real time, can directly stop power supply once the leakage phenomenon of the cooling liquid circulation pipeline is monitored, and displays the leakage position information on the charging pile display panel, so that the problem that the leakage position is undefined is solved, and the safety of the charging pile in the use process is further improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic view of the external structure of a charging pile body according to the present invention;
fig. 2 is a schematic view of the internal structure of the charging pile body according to the present invention;
FIG. 3 is a schematic view of the external structures of the heat conduction module and the heat exchange module according to the present invention;
FIG. 4 is a schematic cross-sectional view of a heat conducting box according to the present invention;
FIG. 5 is a schematic view of the flow direction of the coolant inside the heat transfer tank of the present invention;
FIG. 6 is a schematic diagram of a heat dissipating fan and heat exchanging module according to the present invention;
FIG. 7 is a schematic diagram of an embodiment of the leakage level determination according to the present invention;
FIG. 8 is a schematic flow chart of a liquid cooling heat dissipation charging pile temperature early warning method for liquid leakage early warning provided by the invention;
fig. 9 is a schematic flow chart of a liquid cooling heat dissipation charging pile liquid leakage early warning method for liquid leakage early warning provided by the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-7, the invention provides a liquid cooling heat dissipation charging pile for liquid leakage early warning, which comprises a charging pile main body 1, and further comprises: at least one heat conduction module 2, a heat exchange module 3, a plurality of pressure sensors 5 and a main controller 12.
The invention relates to at least one heat conduction module 2 which is arranged in a charging pile main body 1, wherein each heat conduction module 2 comprises a circulating pump 21 and a heat conduction box 23 which are communicated through a closed cooling liquid circulating pipeline, a plurality of heat conduction loops 234 are arranged in the heat conduction box 23, a charging module 24 is arranged at the middle position of every two adjacent heat conduction loops 234, the charging module 24 is cooled by cooling liquid which circularly flows in the heat conduction loops 234, and in addition, a temperature sensor 235 is arranged at the position of a liquid outlet 232 of the heat conduction box and used for monitoring the temperature value of the cooling liquid in real time.
In this embodiment, the heat conduction tank 23 is further provided with a heat conduction tank liquid inlet 231, and the circulation pump 21 is communicated with the heat conduction tank liquid inlet 231 through a cooling liquid circulation pipeline.
Preferably, 3 heat conducting loops 234 are arranged in each heat conducting box 23, the heat conducting loops 234 are distributed in a serpentine shape in the heat conducting boxes 23, and a plurality of protruding heat conducting blocks 233 are uniformly distributed in each heat conducting loop 234 at equal intervals.
When the cooling liquid flows through the heat conducting loop 234, the plurality of heat conducting blocks 233 uniformly distributed at equal intervals can make the contact area between the cooling liquid and the inner wall of the heat conducting box 23 larger, thereby improving the heat conducting efficiency.
The heat exchange module 3 is arranged below the heat conduction modules 2 and is communicated with each heat conduction module 2 through a cooling liquid circulation pipeline, wherein the heat exchange module 3 comprises a cooling liquid tank 32, a cooling fan 36 and a static pressure liquid level meter 4, wherein the cooling liquid tank 32, the cooling fan 36 and the static pressure liquid level meter 4 are communicated with the cooling liquid circulation pipeline, and the static pressure liquid level meter 4 is used for monitoring the liquid level height value of the cooling liquid in real time.
The static pressure level gauge 4 in the present embodiment is disposed inside the cooling liquid tank 32.
Preferably, a heat dissipation fin 33 is disposed on the front side of the cooling liquid tank 32, and the front side of the heat dissipation fin 33 corresponds to the heat dissipation fan 36.
It should be noted that, the cooling fan 36 in the present embodiment is a plurality of small cooling fans 36, and the cooling fans 36 disposed in front of the cooling fins 33 can effectively promote the circulation of air around the cooling fins 33 so as to reduce the temperature of the cooling liquid in the cooling liquid tank 32.
Preferably, the front and rear of the cooling fan 36 are respectively provided with a front filter screen 37 and a rear filter screen 35, and the front filter screen 37 and the rear filter screen 35 are respectively provided with a plurality of uneven heat dissipation holes 38, and the front filter screen 37, the cooling fan 36 and the rear filter screen 35 are integrally embedded into the front cover plate of the charging pile body 1.
It should be noted that, the heat dissipation holes 38 in the present invention are beneficial to keeping the air inside the charging pile flowing, and do not affect the heat dissipation effect inside the charging pile.
It should be noted that the heat conducting module 2 and the heat exchanging module 3 in the present invention are in sealed communication through a cooling liquid circulation pipeline to form a closed pipeline.
In this embodiment, the cooling liquid tank 32 includes a cooling liquid tank inlet 321 and a cooling liquid tank outlet 322, the cooling liquid circulation pipeline includes a first circulation pipeline 22, a second circulation pipeline 31 and a third circulation pipeline 34, the liquid outlet of the circulation pump 21 is communicated with the heat conduction tank inlet 231 through the first circulation pipeline 22, the liquid outlet 232 is communicated with the cooling liquid tank inlet 321 through the second circulation pipeline 31, and the cooling liquid tank outlet 322 is communicated with the liquid inlet of the circulation pump 21 through the third circulation pipeline 34.
The pressure sensors 5 are uniformly distributed on the inner side of the pipe wall of the cooling liquid circulation pipeline at equal intervals and are used for monitoring the pressure value of the cooling liquid in the cooling liquid circulation pipeline in real time.
In the present invention, the pressure sensors 5 are equally distributed on the inner sides of the walls of the first circulation line 22, the second circulation line 31, and the third circulation line 34, the pressure sensors 5 are respectively numbered S001, S002 … …, and S00N, and the intermediate areas of adjacent pressure sensors 5 are numbered R001, R002 … …, and R00N.
For example, the center area between the S001-type pressure sensor 5 and the S002-type pressure sensor 5 is numbered as R001, the center area between the S002-type pressure sensor 5 and the S003-type pressure sensor 5 is numbered as R002, & gtof & lt, & gtof the center area between the S00N-type pressure sensor 5 and the S00N-type pressure sensor 5 is numbered as R00N-1, and the center area between the S00N-type pressure sensor 5 and the S001-type pressure sensor 5 is numbered as R00N.
It should be noted that, the pressure sensors 5 provided in fig. 7 and located in the second circulation pipeline 31 and numbered S001 and S002 are only examples of the initial positions of the pressure sensors 5 provided in the present invention, and the initial positions of the pressure sensors 5 are set according to the actual requirements during the actual use.
The main controller 12 is arranged in the charging pile main body 1, the main controller 12 receives the temperature value data of the cooling liquid monitored by the temperature sensor in real time, compares the temperature value data with a temperature threshold value built in the main controller 12 and then sends out control signals for controlling the circulating pump 21 and the cooling fan 36; meanwhile, the liquid level height data and the liquid pressure value data of the cooling liquid monitored by the static pressure liquid level meter 4 and the pressure sensor 5 are received in real time, the liquid level height data of the cooling liquid is compared with a liquid level height threshold value built in the main controller 12, and if the liquid level height data of the cooling liquid received by the main controller 12 is higher than the built-in liquid level height threshold value, the main controller 12 clears the synchronously received liquid pressure value data of the cooling liquid; if the liquid level height value data of the cooling liquid received by the main controller 12 is lower than the built-in liquid level height threshold value, the main controller 12 calls the synchronously received liquid level pressure value data to be compared with the built-in pressure threshold value in the main controller 12, judges the liquid leakage position and sends out an early warning signal.
It should be noted that, in the present invention, the temperature threshold value and the liquid level height threshold value built in the main controller 12 are set by themselves according to actual requirements.
It should be noted that the charging pile mentioned in the invention is regularly maintained and supplemented with the cooling liquid amount by a special person, so that the invention does not need to consider the loss amount of the cooling liquid in the recycling process when the liquid level height threshold value is set according to the actual requirement.
In the invention, the pressure threshold value built in the main controller 12 is an optimal value obtained by performing test measurement for a plurality of times under different working conditions based on the constant power Pe of the circulating pump 21 and the constant rotating speed Re of the cooling fan 36.
When the invention needs to be described, the built-in pressure threshold values corresponding to the pressure sensors 5 under different working conditions are obtained after manual actual test measurement for many times and cannot be obtained through the existing formulas and theorem, so that the test measurement process is not specifically described in the invention.
The actual pressure of each area in the cooling liquid circulation pipeline is different, so that the built-in pressure threshold value corresponding to each pressure sensor 5 at the inner side of the pipe wall of the cooling liquid circulation pipeline is required to be determined according to actual test practice.
Meanwhile, two working modes are arranged in the main controller 12, so that the built-in pressure thresholds corresponding to the same pressure sensor 5 in different working modes are different. For example, in the first operation mode, the built-in pressure threshold value corresponding to the pressure sensor 5 at the position, close to the liquid outlet of the circulating pump 21, of the first circulating pipeline 22 is 0.1±0.01MPa, and the built-in pressure threshold value corresponding to the pressure sensor 5 at the position, close to the liquid inlet 231 of the heat conducting tank is 0.1±0.02MPa; however, in the second operation mode, the built-in pressure threshold corresponding to the pressure sensor 5 at the position, close to the liquid outlet of the circulating pump 21, of the first circulating pipeline 22 is 0.12+/-0.01 MPa, and the built-in pressure threshold corresponding to the pressure sensor 5 at the position, close to the liquid inlet 231 of the heat conducting box is 0.12+/-0.02 MPa.
In the invention, a first working mode and a second working mode are arranged in the main controller 12, wherein the first working mode is a working mode in which the temperature value of the cooling liquid monitored by the temperature sensor 235 in real time is lower than a built-in temperature threshold value Tt, the circulating pump 21 runs at constant power Pe in the first working mode, and the cooling fan 36 rotates at constant rotating speed Re; the second operation mode is an operation mode in which the temperature value of the cooling liquid monitored by the temperature sensor 235 in real time is higher than the built-in temperature threshold value Tt, and in the second operation mode, the circulation pump 21 is operated at the actual power Pa, the cooling fan 36 is rotated at the actual rotation speed Ra, and the actual power Pa of the circulation pump 21 is calculated as follows:
，
，
wherein Pa represents the actual power of the circulating pump in the second working mode, pe represents the constant power of the circulating pump in the first working mode, kp represents the power gain of the circulating pump, ta represents the actual temperature of the cooling liquid at the liquid outlet of the heat conducting box, and Tt represents the built-in temperature threshold;
the actual rotation speed Ra of the radiator fan 36 is calculated as follows:
，
，
wherein Ra represents the actual rotation speed of the cooling fan in the second working mode, re represents the constant rotation speed of the cooling fan in the first working mode, kr represents the rotation speed gain of the cooling fan, ta represents the actual temperature of the cooling liquid at the liquid outlet of the heat conducting box, and Tt represents the built-in temperature threshold value.
In the first operation mode of the present invention, the constant power Pe of the circulation pump 21 and the constant rotation speed Re of the cooling fan 36 are both set according to the actual requirements.
In the second operation mode of the present invention, the actual power Pa of the circulation pump 21 and the actual rotational speed Ra of the radiator fan 36 are both determined by the actual coolant temperature Ta and the built-in temperature threshold value Tt. Therefore, in the present invention, the larger the difference between the actual temperature Ta of the cooling liquid and the built-in temperature threshold Tt is, the larger the actual power Pa of the circulation pump 21 is, and at this time, the cooling liquid flowing speed is increased, the rotation speed of the cooling fan 36 is increased, the overall cooling capacity of the charging pile is increased, and the charging module 24 is rapidly cooled.
In the invention, the exterior of the charging pile main body 1 is also provided with a display panel 11 for displaying the specific leakage position information in the cooling liquid circulation pipeline sent by the main controller 12.
The display panel 11, the charging module 24, the temperature sensor 235, the static pressure level meter 4, the pressure sensor 5, the circulation pump 21, and the cooling fan 36 are electrically connected to the main controller 12.
In this embodiment, 1/3 of the height department is provided with one deck intermediate baffle in the electric pile main part 1, and heat conduction module 2 is located intermediate baffle top, and heat transfer module 3 is located the inside top of electric pile main part 1 bottom, is equipped with the through-hole that is convenient for coolant circulation pipeline to pass on the intermediate baffle.
The invention relates to a liquid cooling heat dissipation charging pile for liquid leakage early warning, which comprises the following using principle: when the charging pile is used, the charging module 24 continuously generates heat, heat is transferred into the heat conducting box 23 in close contact, the circulating pump 21 pumps cooling liquid cooled by the cooling fan 36 in the cooling liquid box 32 into the heat conducting loop 234 arranged in the heat conducting box 23, the cooling liquid circularly flows in the heat conducting loop 234, heat transferred by the heat conducting box 23 is taken away, the heat conducting box 23 is cooled, and therefore cooling of the inside of the charging pile is achieved. The temperature sensor 235 arranged at the liquid outlet 232 of the heat conducting box monitors the temperature value of the flowing cooling liquid in real time and uploads the value to the main controller 12 for receiving, when the main controller 12 judges that the temperature value data of the cooling liquid uploaded by the temperature sensor 235 in real time is lower than the temperature threshold value built in the main controller 12, the main controller 12 operates in a first working mode, the circulating pump 21 is controlled to operate at constant power, and the cooling fan 36 rotates at constant rotation speed; when the main controller 12 determines that the temperature value data of the cooling liquid uploaded by the temperature sensor 235 in real time is higher than the temperature threshold value built in the main controller 12, the main controller 12 operates in the second working mode, the circulating pump 21 is controlled to operate at the actual power, the cooling fan 36 rotates at the actual rotating speed, and the charging module 24 is indicated to complete cooling when the temperature sensor 235 monitors that the temperature value of the cooling liquid flowing out of the liquid outlet 232 of the heat conducting box is lower than the temperature threshold value built in the main controller 12 again in real time, at the moment, the main controller 12 operates in the first working mode again, the circulating pump 21 is controlled to operate at the constant power, the cooling fan 36 rotates at the constant rotating speed, and the circulation is performed until the charging pile stops being used.
Referring to fig. 8-9, the invention further provides a liquid cooling heat dissipation charging pile early warning method for liquid leakage early warning, which is applied to the liquid cooling heat dissipation charging pile for liquid leakage early warning, and comprises a temperature early warning method and a liquid leakage early warning method, wherein the temperature early warning method specifically comprises the following steps:
s11: when the charging pile starts to be used, the main controller operates a first working mode;
s12: the temperature sensor monitors the temperature value of the cooling liquid in real time, and the main controller receives the data of the temperature value of the cooling liquid monitored by the temperature sensor in real time and compares the data with a built-in temperature threshold value;
s13: if the received cooling liquid temperature value data is lower than the built-in temperature threshold value, returning to the step S11, and continuously operating the first working mode by the main controller to control the circulating pump and the cooling fan to operate at constant power and constant rotating speed;
s14: if the received cooling liquid temperature value data is higher than the built-in temperature threshold value, the main controller operates a second working mode, controls the circulating pump and the cooling fan to operate at actual power and actual rotating speed, and returns to the step S12 to continuously monitor the actual temperature of the cooling liquid in real time until the cooling liquid temperature value data received by the main controller again is lower than the built-in temperature threshold value, and the main controller operates the first working mode again, and circulates in this way until the charging pile stops being used;
the liquid leakage early warning method specifically comprises the following steps:
s21: when the charging pile starts to be used, the static pressure liquid level meter monitors the liquid level height value of the cooling liquid in real time, and the pressure sensor monitors the liquid pressure value of the cooling liquid in real time;
s22: the main controller receives the liquid level height data of the cooling liquid and the liquid pressure data of the cooling liquid monitored by the static pressure liquid level meter and the pressure sensor in real time, and compares the received liquid level height data of the cooling liquid with a built-in liquid level height threshold value;
s23: if the received liquid level height value data of the cooling liquid is higher than the built-in liquid level height threshold value, the main controller clears the synchronously received liquid level pressure value data of the cooling liquid and returns to the step S21;
s24: if the received liquid level height value data of the cooling liquid is lower than the built-in liquid level height threshold value, the main controller invokes the synchronously received liquid level value data of the cooling liquid to be compared with the built-in pressure threshold value, judges the liquid leakage position and sends out an early warning signal.
It should be noted that the coolant pressure value data in the first operation mode in step S24 is compared with the built-in first operation mode pressure threshold value, and the coolant pressure value data in the second operation mode is compared with the built-in second operation mode pressure threshold value.
It should be noted that, in the present invention, the charging pile is used for maintenance and replenishment of the cooling liquid amount by a dedicated person, so that it is not necessary to consider the situation that the cooling liquid pressure value monitored by the static pressure liquid level meter 4 in real time is not abnormal when the cooling liquid level value monitored by the pressure sensor 5 in real time is lower than the built-in liquid level height threshold value when the cooling liquid leakage phenomenon is monitored.
Because the cooling liquid circulates in the sealed cooling liquid circulation pipeline, if a liquid leakage phenomenon occurs at a certain position of the cooling liquid circulation pipeline, the cooling liquid pressure value measured by the pressure sensor 5 adjacent to the cooling liquid circulation pipeline can be instantaneously reduced, if liquid leakage is continuously performed, the cooling liquid pressure values measured by all the pressure sensors 5 can be continuously reduced, and at the moment, the situation that a liquid leakage position exists in the area between two adjacent pressure sensors 5 with the instantaneous pressure reduction at first can be considered.
Therefore, in the liquid cooling heat dissipation charging pile early warning method for liquid leakage early warning, the charging pile is used at first, the static pressure liquid level meter 4 and the pressure sensor 5 can respectively monitor the liquid level height value of the cooling liquid and the liquid pressure value of the cooling liquid in real time, and if the liquid level height value data of the cooling liquid received by the main controller 12 is not abnormal in one period, the liquid pressure value data of the cooling liquid received by the main controller 12 in the one period is cleared; if the height value data of the liquid level of the cooling liquid received by the main controller 12 in the period is abnormal, the main controller 12 judges that the liquid leakage phenomenon exists in the cooling liquid circulation pipeline, and immediately invokes the data of the liquid level value of the cooling liquid in the period to start processing, so as to find the liquid leakage position.
For example, if there is a leakage level between the S001 and S002 pressure sensors 5, the coolant pressure at the S001 and S002 positions is instantaneously reduced, and then the coolant pressure monitored by the pressure sensors 5 uniformly distributed in the coolant circulation line is continuously reduced, so that it is considered that there is a leakage level in the middle region R001 between the S001 and S002 pressure sensors 5, at this time, the main controller 12 sends a power supply stopping instruction to the charging module 24, and displays the leakage position information on the display panel 11, and the vehicle BMS terminates charging, thereby realizing the self-protection function of the charging pile.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (9)
1. Liquid cooling heat dissipation fills electric pile of weeping early warning, including filling electric pile main part, its characterized in that still includes:
the heat conduction module is arranged in the charging pile main body, each heat conduction module comprises a circulating pump and a heat conduction box which are communicated through a closed cooling liquid circulating pipeline, a plurality of heat conduction loops are arranged in the heat conduction box, a charging module is arranged at the middle position of each two adjacent heat conduction loops, the charging module is cooled by cooling liquid which circularly flows in the heat conduction loops, and in addition, a temperature sensor is arranged at the position of a liquid outlet of the heat conduction box and used for monitoring the temperature value of the cooling liquid in real time;
the heat exchange module is arranged below the heat conduction modules and communicated with each heat conduction module through a cooling liquid circulation pipeline, wherein the heat exchange module comprises a cooling liquid tank, a cooling fan and a static pressure liquid level meter, wherein the cooling liquid tank, the cooling fan and the static pressure liquid level meter are communicated with the cooling liquid circulation pipeline, and the static pressure liquid level meter is used for monitoring the liquid level height value of the cooling liquid in real time;
the pressure sensors are uniformly distributed on the inner side of the pipe wall of the cooling liquid circulation pipeline at equal intervals and are used for monitoring the pressure value of the cooling liquid in the cooling liquid circulation pipeline in real time;
the main controller is arranged in the charging pile main body, receives the temperature value data of the cooling liquid monitored by the temperature sensor in real time, compares the temperature value data with a temperature threshold value arranged in the main controller, and sends out control signals for controlling the circulating pump and the cooling fan; meanwhile, the liquid level height data of the cooling liquid and the liquid pressure value data of the cooling liquid monitored by the static pressure liquid level meter and the pressure sensor are received in real time, the liquid level height data of the cooling liquid is compared with a liquid level height threshold value arranged in the main controller, and if the liquid level height data of the cooling liquid received by the main controller is higher than the liquid level height threshold value arranged in the main controller, the main controller clears the liquid level height data of the cooling liquid synchronously received; if the liquid level height value data of the cooling liquid received by the main controller is lower than the built-in liquid level height threshold value, the main controller invokes the synchronously received liquid level value data of the cooling liquid to be compared with the built-in pressure threshold value in the main controller, judges the liquid leakage position and sends out an early warning signal;
a first working mode and a second working mode are arranged in the main controller, wherein the first working mode is a working mode in which the temperature value of the cooling liquid monitored by the temperature sensor in real time is lower than a built-in temperature threshold Tt, the circulating pump operates at constant power Pe in the first working mode, and the cooling fan rotates at constant rotating speed Re; the second working mode is a working mode that the temperature value of the cooling liquid monitored by the temperature sensor in real time is higher than the built-in temperature threshold value Tt, the circulating pump operates at the actual power Pa under the second working mode, the cooling fan rotates at the actual rotating speed Ra, and the actual power Pa of the circulating pump has the following calculation formula:
，
，
wherein Pa represents the actual power of the circulating pump in the second working mode, pe represents the constant power of the circulating pump in the first working mode, kp represents the power gain of the circulating pump, ta represents the actual temperature of the cooling liquid at the liquid outlet of the heat conducting box, and Tt represents the built-in temperature threshold;
the actual rotation speed Ra of the cooling fan is calculated as follows:
，
，
wherein Ra represents the actual rotation speed of the cooling fan in the second working mode, re represents the constant rotation speed of the cooling fan in the first working mode, kr represents the rotation speed gain of the cooling fan, ta represents the actual temperature of the cooling liquid at the liquid outlet of the heat conducting box, and Tt represents the built-in temperature threshold value.
2. The liquid cooling heat dissipation charging pile for liquid leakage early warning according to claim 1, wherein a display panel is further arranged outside the charging pile body and used for displaying specific liquid leakage position information in a cooling liquid circulation pipeline sent by the main controller.
3. The liquid cooling heat dissipation charging pile for liquid leakage early warning according to claim 2, wherein 3 heat conduction loops are arranged in each heat conduction box, the heat conduction loops are distributed in a serpentine shape in the heat conduction box, and a plurality of protruding heat conduction blocks are uniformly distributed in each heat conduction loop at equal intervals.
4. The liquid cooling heat dissipation charging pile for liquid leakage pre-warning according to claim 3, wherein heat dissipation fins are arranged on the front side of the cooling liquid tank, and the front side of each heat dissipation fin corresponds to the heat dissipation fan.
5. The liquid cooling heat dissipation charging pile for liquid leakage pre-warning according to claim 4, wherein a front filter screen and a rear filter screen are respectively arranged in front of and behind the heat dissipation fan, a plurality of uneven heat dissipation holes are formed in the front filter screen and the rear filter screen, and the front filter screen, the heat dissipation fan and the rear filter screen are integrated and embedded into a front cover plate of the charging pile body.
6. The liquid cooling heat dissipation charging pile for liquid leakage pre-warning according to claim 5, wherein the cooling liquid circulation pipeline comprises a first circulation pipeline, a second circulation pipeline and a third circulation pipeline, the circulation pump is communicated with the heat conduction box through the first circulation pipeline, the heat conduction box is communicated with the cooling liquid box through the second circulation pipeline, and the cooling liquid box is communicated with the circulation pump through the third circulation pipeline.
7. The liquid cooling heat dissipation and charge pile for liquid leakage pre-warning according to claim 6, wherein the display panel, the charging module, the temperature sensor, the static pressure liquid level meter, the pressure sensor, the circulating pump and the heat dissipation fan are electrically connected with the main controller.
8. The liquid cooling heat dissipation charging pile early warning method for liquid leakage early warning is applied to the liquid cooling heat dissipation charging pile for liquid leakage early warning according to any one of claims 1-7, and is characterized by comprising a temperature early warning method and a liquid leakage early warning method, wherein the temperature early warning method specifically comprises the following steps:
s11: when the charging pile starts to be used, the main controller operates a first working mode;
s12: the temperature sensor monitors the temperature value of the cooling liquid in real time, and the main controller receives the data of the temperature value of the cooling liquid monitored by the temperature sensor in real time and compares the data with a built-in temperature threshold value;
s13: if the received cooling liquid temperature value data is lower than the built-in temperature threshold value, returning to the step S11, and continuously operating the first working mode by the main controller to control the circulating pump and the cooling fan to operate at constant power and constant rotating speed;
s14: if the received cooling liquid temperature value data is higher than the built-in temperature threshold value, the main controller operates a second working mode, controls the circulating pump and the cooling fan to operate at actual power and actual rotating speed, and returns to the step S12 to continuously monitor the actual temperature of the cooling liquid in real time until the cooling liquid temperature value data received by the main controller again is lower than the built-in temperature threshold value, and the main controller operates the first working mode again, and circulates in this way until the charging pile stops being used;
the liquid leakage early warning method specifically comprises the following steps:
s21: when the charging pile starts to be used, the static pressure liquid level meter monitors the liquid level height value of the cooling liquid in real time, and the pressure sensor monitors the liquid pressure value of the cooling liquid in real time;
s22: the main controller receives the liquid level height data of the cooling liquid and the liquid pressure data of the cooling liquid monitored by the static pressure liquid level meter and the pressure sensor in real time, and compares the received liquid level height data of the cooling liquid with a built-in liquid level height threshold value;
s23: if the received liquid level height value data of the cooling liquid is higher than the built-in liquid level height threshold value, the main controller clears the synchronously received liquid level pressure value data of the cooling liquid and returns to the step S21;
s24: if the received liquid level height value data of the cooling liquid is lower than the built-in liquid level height threshold value, the main controller invokes the synchronously received liquid level value data of the cooling liquid to be compared with the built-in pressure threshold value, judges the liquid leakage position and sends out an early warning signal.
9. The liquid cooling heat dissipation charging pile pre-warning method of claim 8, wherein in the step S24, the cooling fluid pressure value data in the first operation mode is compared with the built-in first operation mode pressure threshold value, and the cooling fluid pressure value data in the second operation mode is compared with the built-in second operation mode pressure threshold value.
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