CN113895263B - Electric automobile fills electric pile cooling system - Google Patents

Electric automobile fills electric pile cooling system Download PDF

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Publication number
CN113895263B
CN113895263B CN202111196205.8A CN202111196205A CN113895263B CN 113895263 B CN113895263 B CN 113895263B CN 202111196205 A CN202111196205 A CN 202111196205A CN 113895263 B CN113895263 B CN 113895263B
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China
Prior art keywords
charging pile
cooling water
pipeline
heat dissipation
water tank
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CN113895263A (en
Inventor
朱传辉
闫树斌
沈莉芳
李惠英
罗权权
崔洋
黄碧漪
张伟
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Zhejiang University of Water Resources and Electric Power
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Zhejiang University of Water Resources and Electric Power
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Priority to CN202111196205.8A priority Critical patent/CN113895263B/en
Priority to ZA2021/10085A priority patent/ZA202110085B/en
Publication of CN113895263A publication Critical patent/CN113895263A/en
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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
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
    • F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention provides a heat dissipation system of an electric automobile charging pile. The electric automobile fills electric pile cooling system includes absorber, solution pump, generator, condenser, first cold water tank, second cold water tank, choke valve, evaporimeter including second cooling water circulation pipeline fill electric pile, first electromagnetism three-way valve, second electromagnetism three-way valve and PLC switch board including first cooling water circulation pipeline. The PLC control cabinet is arranged for controlling the solution pump, the charging pile, the first electromagnetic three-way valve and/or the second electromagnetic three-way valve. This electric automobile fills electric pile cooling system through using the coolant to fill electric pile and cool off, can avoid dust, corrosive gas, moisture etc. to get into the accurate components and parts of pollution in the cabinet, and the radiating effect is also more direct, reliable.

Description

Electric automobile fills electric pile cooling system
Technical Field
The invention relates to the technical field of absorption refrigeration, in particular to a heat dissipation system of an electric automobile charging pile.
Background
With the continuous development of electric automobile technology, electric automobiles are becoming more and more popular in daily trips, and are also being increasingly supported by consumers due to the environmental protection property. By 2020, about 500 ten thousand electric vehicles exist nationwide, more than 1.2 ten thousand centralized charging stations are newly added, more than 480 ten thousand distributed charging piles are added, the construction investment scale of charging facilities reaches 1240 hundred million yuan, and the market is in great development opportunity.
An important factor of the electric vehicle is the convenience of the electric vehicle in the use process, and the most important factor is whether the electric vehicle can meet the requirement of quick charging. In order to meet the requirement of quick charging, electric vehicles and charging pile manufacturers continuously improve the charging speed of the electric vehicles, however, along with the acceleration of the charging speed of the electric vehicles, charging current and charging voltage are also greatly increased, and further the power of the charging pile inductance module is increased. In the charging process, elements such as an inductance module, a power module and the like of the charging pile can generate heat rapidly and in a large amount. For example, the power range of the commercial direct current charging pile is 30KW, 60KW and 120KW, and the efficiency is generally about 95%, so that 5% of the power is converted into heat loss, and the heat loss is 1.5KW, 3KW and 6KW. If not timely dissipated, the heat can accelerate the aging of the equipment and can cause a great safety accident. Meanwhile, the outdoor equipment is required to be subjected to waterproof and dustproof treatment so as to prevent the situations of short circuit and signal disorder of the electronic equipment. Therefore, the heat dissipation problem of the charging pile is one of the problems which must be solved by the popularization and construction of the charging pile of the electric automobile.
At present, the conventional heat dissipation mode that adopts of electric pile is mostly radiator fan. But the cooling fan easily causes outdoor dust to enter the cabinet to pollute the precise components. In addition, if the heat dissipation of the heating body is not strong, heat is easy to accumulate in the heating body, and even if the external heat dissipation force is large, the heat dissipation effect is limited. Meanwhile, the heat radiation fan is not beneficial to light integrated design, and the air inlet and outlet of the heat radiation fan can bring interference of dust, corrosive gas, moisture and the like.
Therefore, a new technology is urgently needed to solve the above-mentioned problems.
Disclosure of Invention
In order to make up the defect of the prior art, the application provides an electric automobile fills electric pile cooling system. This electric automobile fills electric pile cooling system through using the coolant to fill electric pile and cool off, can avoid dust, corrosive gas, moisture etc. to get into the accurate components and parts of pollution in the cabinet, and the radiating effect is also more direct, reliable. The electric automobile fills electric pile cooling system and has independent refrigeration, power supply and cold-storage system, can be stable and effectual for fill electric pile and provide the heat dissipation function.
An aspect of the application is to provide a heat dissipation system of an electric automobile charging pile. The electric automobile fills electric pile cooling system includes absorber, solution pump, generator, condenser, first cold water tank, second cold water tank, choke valve, evaporimeter including second cooling water circulation pipeline fill electric pile, first electromagnetism three-way valve, second electromagnetism three-way valve and PLC switch board including first cooling water circulation pipeline. The PLC control cabinet is arranged for controlling the solution pump, the charging pile, the first electromagnetic three-way valve and/or the second electromagnetic three-way valve.
The absorber and the generator are respectively connected with a dilute solution pipeline through a concentrated solution pipeline, the dilute solution pipeline is provided with a solution pump, the generator is connected with a condenser, the condenser is connected with an evaporator through a throttle valve, and the evaporator is connected with the absorber to form a refrigeration cycle loop.
The water inlet of the cooling water pipeline of the condenser is connected with the water outlet of the first cooling water tank, the water outlet of the cooling water pipeline of the condenser is connected with the water inlet of the first cooling water tank, a first cooling water circulation loop is formed, and the first cooling water circulation loop further comprises a circulating pump which is arranged between the water inlet of the cooling water pipeline of the condenser and the water outlet of the first cooling water tank or between the water outlet of the cooling water pipeline of the condenser and the water inlet of the first cooling water tank.
The water inlet of the cooling water pipeline of the evaporator is respectively connected with the water outlet of the second cooling water tank and the water outlet of the cooling water pipeline of the charging pile through the first electromagnetic three-way valve, the water outlet of the cooling water pipeline of the evaporator is respectively connected with the water inlet of the second cooling water tank and the water inlet of the cooling water pipeline of the charging pile through the second electromagnetic three-way valve to form a charging pile cooling loop, the charging pile cooling loop further comprises a cooling circulating pump, and the cooling circulating pump is arranged between the water inlet of the cooling water pipeline of the evaporator and the first electromagnetic three-way valve or between the water outlet of the cooling water pipeline of the evaporator and the second electromagnetic three-way valve.
In some embodiments, the electric vehicle charging pile heat dissipation system further comprises a parking garage comprising a parking area and a solar house area disposed above the parking area, the charging pile is disposed in the parking area, and the generator is disposed in the solar house area.
In some embodiments, the electric automobile fills electric pile cooling system and further includes wind-guiding pipeline and the wind-guiding fan that sets up in the wind-guiding pipeline is inside, and the one end of wind-guiding pipeline links to each other in filling the electric pile, and the other end of wind-guiding pipeline links to each other with the sun room region.
In some embodiments, the PLC control cabinet is configured to control alternating operation of the wind-guiding blower and the cooling circulation pump.
In some embodiments, a glass cover plate is provided on top of the solar house area, and a thermal insulation layer is provided between the solar house area and the parking area.
In some embodiments, the electric vehicle charging pile heat dissipation system further comprises a temperature sensor, wherein the temperature sensor is arranged in the charging pile and/or the solar house area, and the temperature sensor is in communication connection with the PLC control cabinet.
In some embodiments, the electric vehicle charging pile heat dissipation system further comprises a photovoltaic power generation device, the photovoltaic power generation device is arranged to supply power to the electric vehicle charging pile heat dissipation system, the solar power generation device comprises a solar photovoltaic panel, a photovoltaic controller connected with the solar photovoltaic panel, a storage battery connected with the solar photovoltaic panel and the photovoltaic controller respectively, and a power supply connected with the storage battery, the photovoltaic power generation device is arranged inside a solar house area, an insulation layer is arranged between the photovoltaic power generation device and the generator, and a fan is arranged on the insulation layer.
In some embodiments, the refrigeration cycle includes a refrigeration working pair, the refrigeration working pair being water/lithium bromide.
In some embodiments, the electric vehicle charging pile heat dissipation system further includes a heat exchanger, the heat exchanger is disposed on the concentrated solution pipeline and the dilute solution pipeline between the absorber and the generator, the heat exchanger is used for heat exchange between the concentrated solution pipeline and the dilute solution pipeline, and an electromagnetic valve is disposed on the concentrated solution pipeline between the heat exchanger and the absorber.
In some embodiments, the phase change material used in the first cold water tank and/or the second cold water tank has a phase change temperature in the range of 15-25 ℃.
Drawings
The present application may be better understood by describing embodiments thereof in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic view of a liquid path structure of a heat dissipation system of an electric vehicle charging pile according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a heat dissipation system of an electric vehicle charging pile according to an embodiment shown in fig. 1; and
fig. 3 is a schematic structural view of the photovoltaic power generation device in the embodiment shown in fig. 1.
Reference numerals illustrate:
100: an absorber;
110: a solution pump;
120: a generator;
130: a condenser;
140: a first cold water tank;
150: a second cold water tank;
160: a throttle valve;
170: an evaporator;
180: charging piles;
190: a first electromagnetic three-way valve;
200: a second electromagnetic three-way valve;
210: a PLC control cabinet;
220: a concentrated solution pipeline;
230: a dilute solution line;
240: a circulation pump;
250: a cooling circulation pump;
260: a parking garage;
270: a parking area;
280: a solar house area;
290: an air guide duct;
300: an air guide fan;
310: a glass cover plate;
320: a thermal insulation layer;
330: a photovoltaic power generation device;
340: a solar photovoltaic panel;
350: a photovoltaic controller;
360: a storage battery;
370: a power supply;
380: a heat preservation layer;
390: a blower;
400: a heat exchanger;
410, electromagnetic valve;
420: a liquid adding tube.
Detailed Description
Unless defined otherwise, technical or scientific terms used in the specification and claims should be given the ordinary meaning as understood by one of ordinary skill in the art to which the invention pertains.
All numerical values recited herein as being from the lowest value to the highest value refer to all numerical values obtained in increments of one unit between the lowest value and the highest value when there is a difference of more than two units between the lowest value and the highest value.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, 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 can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that in the course of the detailed description of these embodiments, it is not possible in this specification to describe all features of an actual embodiment in detail for the sake of brevity.
The embodiment of the application relates to an electric automobile charging pile heat dissipation system as shown in fig. 1 to 3. The electric automobile charging pile heat dissipation system comprises an absorber 100, a solution pump 110, a generator 120, a condenser 130 comprising a first cooling water circulation pipeline, a first cold water tank 140, a second cold water tank 150, a throttle valve 160, an evaporator 170, a charging pile 180 comprising a second cooling water circulation pipeline, a first electromagnetic three-way valve 190, a second electromagnetic three-way valve 200 and a PLC control cabinet 210. The PLC control cabinet 210 is provided for controlling the solution pump 110, the charging pile 180, the first electromagnetic three-way valve 190, and/or the second electromagnetic three-way valve 200.
The absorber 100 and the generator 120 are respectively connected with a dilute solution pipeline 230 through a concentrated solution pipeline 220, the dilute solution pipeline 230 is provided with a solution pump 110, the generator 120 is connected with a condenser 130, the condenser 130 is connected with an evaporator 170 through a throttle valve 160, and the evaporator 170 is connected with the absorber 100 to form a refrigeration cycle. In some embodiments, the refrigeration cycle includes a refrigeration working pair, the refrigeration working pair being water/lithium bromide.
The water inlet of the cooling water pipe of the condenser 130 is connected with the water outlet of the first cooling water tank 140, the water outlet of the cooling water pipe of the condenser 130 is connected with the water inlet of the first cooling water tank 140, and a first cooling water circulation loop is formed, and the first cooling water circulation loop further comprises a circulation pump 240, wherein the circulation pump 240 is arranged between the water inlet of the cooling water pipe of the condenser 130 and the water outlet of the first cooling water tank 140 or between the water outlet of the cooling water pipe of the condenser 130 and the water inlet of the first cooling water tank 140.
The water inlet of the cooling water pipe of the evaporator 170 is connected with the water outlet of the second cooling water tank 150 and the water outlet of the cooling water pipe of the charging pile 180 through the first electromagnetic three-way valve 190, the water outlet of the cooling water pipe of the evaporator 170 is connected with the water inlet of the second cooling water tank 150 and the water inlet of the cooling water pipe of the charging pile 180 through the second electromagnetic three-way valve 200, a cooling loop of the charging pile 180 is formed, the cooling loop of the charging pile 180 further comprises a cooling circulation pump 250, and the cooling circulation pump 250 is arranged between the water inlet of the cooling water pipe of the evaporator 170 and the first electromagnetic three-way valve 190 or between the water outlet of the cooling water pipe of the evaporator 170 and the second electromagnetic three-way valve 200.
In some embodiments, the electric vehicle charging pile heat dissipation system further includes a parking garage 260, the parking garage 260 including a parking area 270 and a solar house area 280 disposed above the parking area 270, the charging pile 180 disposed within the parking area 270, and the generator 120 disposed within the solar house area 280.
In some embodiments, the electric vehicle charging pile heat dissipation system further includes an air guide duct 290 and an air guide fan 300 disposed inside the air guide duct 290, one end of the air guide duct 290 is connected to the charging pile 180, and the other end of the air guide duct 290 is connected to the solar house area 280. The air guide duct 290 with the air guide fan 300 can extract heat generated during the operation of the charging pile 180 through the fan 390 and convey the heat to the solar house area 280 for use, and specifically, can provide a low-temperature heat source for the generator 120 in the solar house area 280.
In some embodiments, PLC control cabinet 210 is configured to control alternating operation of wind-guiding blower 300 and cooling circulation pump 250. The PLC control cabinet 210 may control to ensure that the temperature delivered into the solar room area 280 by the wind-guiding blower 300 is not lower than a target temperature, which may be an outdoor temperature.
In some embodiments, a glass cover 310 is provided on top of the solar house area 280, and a thermal insulation layer 320 is provided between the solar house area 280 and the parking area 270. The glass cover 310 may be used to collect thermal energy from the sun and the insulating layer 320 may be used to perform a soak process so that the solar room area 280 may reach a target temperature, which may be 75-110 ℃.
In some embodiments, the electric vehicle charging pile heat dissipation system further includes a temperature sensor disposed within the charging pile 180 and/or the solar house area 280, the temperature sensor being communicatively coupled to the PLC control cabinet 210.
In some embodiments, the electric vehicle charging pile heat dissipation system further includes a photovoltaic power generation device 330, the photovoltaic power generation device 330 is configured to supply power to the electric vehicle charging pile heat dissipation system, the photovoltaic power generation device 330 includes a solar photovoltaic panel 340, a photovoltaic controller 350 connected to the solar photovoltaic panel 340, a storage battery 360 connected to the solar photovoltaic panel 340 and the photovoltaic controller 350 respectively, and a power supply 370 connected to the storage battery 360, the photovoltaic power generation device 330 is disposed inside the solar house area 280, a heat preservation layer 380 is disposed between the photovoltaic power generation device 330 and the generator 120, and a fan 390 is disposed on the heat preservation layer 380.
In some embodiments, the insulating layer 380 is used to seal the periphery of the 5kW photovoltaic power generation device 330, the efficiency of the photovoltaic module is generally 20%, that is, the daily power generation capacity of the photovoltaic power generation device 330 is 7kw·h, the use of the power consumption part of the electric pile heat dissipation system of the electric automobile can be satisfied, and the part with redundant power generation capacity is stored in the storage battery 360. While the remaining 80% of the energy, in addition to being partially reflected, increases the temperature inside the solar field 280. The specific elevated temperature varies from region to region. In some embodiments, the solar photovoltaic panel 340 has an area of greater than 30m 2 。
Insulation 380 may be used to perform an insulation process so that solar house area 280 may reach a target temperature. While fans 390 on insulation 380 may be used to draw heat generated during operation of photovoltaic power plant 330 through fans 390 and to transport it to solar room area 280 for use, and in particular, may provide a low temperature heat source for generator 120 within solar room area 280. In some embodiments, the electric vehicle charging pile heat dissipation system further includes a heat exchanger 400, the heat exchanger 400 is disposed on the concentrated solution pipeline 220 and the dilute solution pipeline 230 between the absorber 100 and the generator 120, the heat exchanger 400 is used for heat exchanging between the concentrated solution pipeline 220 and the dilute solution pipeline 230, and an electromagnetic valve 410 is disposed on the concentrated solution pipeline 220 between the heat exchanger 400 and the absorber 100. The heat exchanger 400 may improve system efficiency and reduce losses by heating the dilute solution line 230 using the waste heat in the concentrated solution line 220.
In some embodiments, the phase change material used in the first cold water tank 140 and/or the second cold water tank 150 has a phase change temperature in the range of 15-25 ℃. In some embodiments, the phase change material has a latent heat of phase change of 90 to 250kJ/kg and a thermal conductivity of 0.1 to 0.2W/(mK).
The first cold water tank 140 and/or the second cold water tank 150 may be an underground cold water tank. A filling pipe 420 may be provided on the first cold water tank 140 and/or the second cold water tank 150.
Taking the embodiment shown in fig. 1 to 3 as an example, a brief description will be given of an operation method of the electric vehicle charging pile heat dissipation system according to the embodiment.
As in the embodiment shown in fig. 1-3, water/lithium bromide is used as the refrigeration working substance pair. The operation method of the refrigeration cycle circuit comprises the following steps: first, the water/lithium bromide dilute solution in the absorber 100 is transferred to the generator 120 via the dilute solution pump 110 through the dilute solution line 230. The dilute water/lithium bromide solution in the generator 120 is then heated by the low temperature heat source from the solar house area 280 to become a concentrated water/lithium bromide solution, while generating cryogen vapor. The low temperature heat source may be thermal energy from the sun, thermal energy delivered by wind turbine 300, and/or thermal energy generated by photovoltaic power generation device 330. The water/lithium bromide concentrate flows back to the absorber 100 through the concentrate line 220 and the refrigerant vapor enters the condenser 130, and the cooling water provided by the first cooling water tank 140 is cooled and condensed into a saturated liquid by the first cooling water circulation loop, and the cooling water takes away the heat of the refrigerant vapor. Then, the saturated liquid is throttled and depressurized by the throttle valve 160 to enter the evaporator 170, so as to absorb the heat emitted by the charging pile 180, further cool the charging pile 180, and the saturated liquid is vaporized and becomes saturated gas. Finally, the saturated gas enters the absorber 100 to be absorbed by the water/lithium bromide concentrated solution from the generator 120, the water/lithium bromide concentrated solution is diluted into water/lithium bromide diluted solution, and then the diluted solution is sent to the generator 120 again by the solution pump 110, thus completing the whole refrigeration cycle.
Correspondingly, the operation method of the cooling loop of the charging pile 180 is as follows: when the charging stake 180 is operated, the cold from the evaporator 170 enters the charging stake 180 through the cooling circulation pump 250 and cools the inside of the charging stake 180. At this time, the first and second solenoid three- way valves 190 and 200 open the circulation in the direction of the charging stake 180, and the direction to the second cold water tank 150 is closed. When the charging pile 180 is not operated, the cold energy from the evaporator 170 enters the second cold water tank 150 through the cooling circulation pump 250 to be stored. At this time, the first and second electromagnetic three- way valves 190 and 200 are closed in the circulation of the direction of the charging pile 180, and opened in the direction toward the second cold water tank 150. Wherein the phase change material used in the second cold water tank 150 has a phase change temperature range of 15-25 deg.c.
In addition, in the process of cooling the charging pile 180, according to temperature information fed back by the temperature sensor installed inside the charging pile 180, the PLC control cabinet 210 controls the air guide fan 300 and the cooling circulation pump 250 to alternately operate, so as to ensure that the temperature of the air guide fan 300 conveyed into the solar house area 280 is not lower than a target temperature, which may be an outdoor temperature.
In daily use, the charging pile works for 10 hours every day, and generally, at least cooling capacity corresponding to 10 hours is needed to perform heat dissipation operation on the charging pile. The power of the common direct current charging pile in the market is 30KW, 60KW and 120KW, and the efficiency is generally about 95 percent, so that 5 percent of the power is converted into heat loss, and the heat loss is 1.5KW, 3KW and 6KW correspondingly. According to the highest standard 6KW/h heat consumption calculation, the refrigerating capacity required for the heat dissipation operation of the charging pile should be greater than or equal to 6KW/h, meanwhile, considering the loss of the refrigerating capacity, and according to the highest loss of 10%, the refrigerating capacity should reach 6.6KW/h to ensure the reliable completion of the heat dissipation operation.
And apply for the electric steamThe test of the vehicle charging pile heat dissipation system shows that when the solar radiation intensity is 780-990W/m 2 When the refrigerating capacity of the system is linearly increased, the refrigerating capacity can be increased from 8.0KW to 16KW. Can completely meet the requirements of daily operation.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention, and are more fully described herein with reference to the accompanying drawings, in which the principles of the present invention are shown and described, and in which the general principles of the invention are defined by the appended claims.

Claims (10)

1. The electric automobile charging pile heat dissipation system is characterized by comprising an absorber, a solution pump, a generator, a condenser comprising a first cooling water circulation pipeline, a first cold water tank, a second cold water tank, a throttle valve, an evaporator, a charging pile comprising a second cooling water circulation pipeline, a first electromagnetic three-way valve, a second electromagnetic three-way valve and a PLC control cabinet; the PLC control cabinet is used for controlling the solution pump, the charging pile, the first electromagnetic three-way valve and/or the second electromagnetic three-way valve; wherein, the liquid crystal display device comprises a liquid crystal display device,
the absorber and the generator are respectively connected with a dilute solution pipeline through a concentrated solution pipeline, the dilute solution pipeline is provided with the solution pump, the generator is connected with the condenser, the condenser is connected with the evaporator through the throttle valve, and the evaporator is connected with the absorber to form a refrigeration cycle loop;
the water inlet of the cooling water pipeline of the condenser is connected with the water outlet of the first cooling water tank, the water outlet of the cooling water pipeline of the condenser is connected with the water inlet of the first cooling water tank to form a first cooling water circulation loop, and the first cooling water circulation loop further comprises a circulating pump which is arranged between the water inlet of the cooling water pipeline of the condenser and the water outlet of the first cooling water tank or between the water outlet of the cooling water pipeline of the condenser and the water inlet of the first cooling water tank;
the water inlet of the cooling water pipeline of the evaporator is respectively connected with the water outlet of the second cooling water tank and the water outlet of the cooling water pipeline of the charging pile through a first electromagnetic three-way valve, the water outlet of the cooling water pipeline of the evaporator is respectively connected with the water inlet of the second cooling water tank and the water inlet of the cooling water pipeline of the charging pile through a second electromagnetic three-way valve to form a charging pile cooling loop, and the charging pile cooling loop further comprises a cooling circulating pump which is arranged between the water inlet of the cooling water pipeline of the evaporator and the first electromagnetic three-way valve or between the water outlet of the cooling water pipeline of the evaporator and the second electromagnetic three-way valve;
wherein the first cold water tank and the second cold water tank are buried cold water tanks.
2. The electric vehicle charging pile heat dissipation system of claim 1, further comprising a parking garage comprising a parking area and a solar house area disposed above the parking area, wherein the charging pile is disposed in the parking area and the generator is disposed in the solar house area.
3. The electric vehicle charging pile heat dissipation system according to claim 2, further comprising an air guide pipeline and an air guide fan arranged inside the air guide pipeline, wherein one end of the air guide pipeline is connected with the charging pile, and the other end of the air guide pipeline is connected with the solar house area.
4. The electric car charging pile heat dissipation system according to claim 3, wherein the PLC control cabinet is configured to control the wind guide blower and the cooling circulation pump to alternately operate.
5. The electric vehicle charging pile heat dissipation system according to claim 2, wherein a glass cover plate is arranged at the top of the solar house area, and a heat insulation layer is arranged between the solar house area and the parking area.
6. The electric vehicle charging pile heat dissipation system of claim 2, further comprising a temperature sensor disposed in the charging pile and/or the solar house area, the temperature sensor in communication with the PLC control cabinet.
7. The electric vehicle charging pile heat dissipation system of claim 2, further comprising a photovoltaic power generation device configured to supply power to the electric vehicle charging pile heat dissipation system, the photovoltaic power generation device comprising a solar photovoltaic panel, a photovoltaic controller connected to the solar photovoltaic panel, a storage battery connected to the solar photovoltaic panel and the photovoltaic controller, and a power supply connected to the storage battery, the photovoltaic power generation device being disposed inside the solar house area, a thermal insulation layer being disposed between the photovoltaic power generation device and the generator, a fan being disposed on the thermal insulation layer, the area of the solar photovoltaic panel being greater than 30m 2 。
8. The electric car charging pile heat dissipation system of claim 1, wherein the refrigeration cycle circuit comprises a refrigeration working pair, the refrigeration working pair being water/lithium bromide.
9. The electric vehicle charging pile heat dissipation system according to claim 1, further comprising a heat exchanger provided on the concentrated solution pipe and the dilute solution pipe between the absorber and the generator, the heat exchanger being for heat exchanging the concentrated solution pipe and the dilute solution pipe, and an electromagnetic valve being provided on the concentrated solution pipe between the heat exchanger and the absorber.
10. The electric car charging pile heat dissipation system according to claim 1, wherein the phase change material used by the first cold water tank and/or the second cold water tank has a phase change temperature range of 15-25 ℃.
CN202111196205.8A 2021-10-14 2021-10-14 Electric automobile fills electric pile cooling system Active CN113895263B (en)

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ZA2021/10085A ZA202110085B (en) 2021-10-14 2021-12-07 Heat dissipation system for electric vehicle charging post

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CN102322706B (en) * 2011-09-30 2014-10-15 深圳市唯克瑞投资咨询有限公司 Vehicle-mounted refrigeration equipment driven by engine waste heat
CN104776634A (en) * 2015-04-16 2015-07-15 广州大学 Double-effect absorption-type automotive air-conditioner
CN106080230A (en) * 2016-06-13 2016-11-09 苏州迈奇杰智能技术有限公司 A kind of from cooling down self-service photovoltaic charged stake
CN106766356A (en) * 2016-11-11 2017-05-31 江苏大学 A kind of solar energy assisted absorption refrigerating plant for refrigerator car
CN111787762A (en) * 2020-06-24 2020-10-16 浙江万马新能源有限公司 Fill electric pile cooling heat dissipation system
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