CN116424124A - Charging pile liquid cooling system and cooling method - Google Patents
Charging pile liquid cooling system and cooling method Download PDFInfo
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- CN116424124A CN116424124A CN202310302108.5A CN202310302108A CN116424124A CN 116424124 A CN116424124 A CN 116424124A CN 202310302108 A CN202310302108 A CN 202310302108A CN 116424124 A CN116424124 A CN 116424124A
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- 239000007788 liquid Substances 0.000 title claims abstract description 79
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- 239000000110 cooling liquid Substances 0.000 claims abstract description 54
- 239000000498 cooling water Substances 0.000 claims abstract description 21
- 230000017525 heat dissipation Effects 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000005057 refrigeration Methods 0.000 claims abstract description 15
- 239000012809 cooling fluid Substances 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 10
- 239000003507 refrigerant Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
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- 230000005611 electricity Effects 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 description 7
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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
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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
- B60L53/31—Charging columns specially adapted for electric vehicles
-
- 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
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- 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)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The cooling liquid distribution unit distributes cooling fluid in the charging pile body and transmits heat from the charging pile body to the external circulation cooling water system, the cooling liquid distribution unit comprises a first side pipeline communicated with the external circulation cooling water system and used for absorbing heat in the charging pile body and a second side pipeline communicated with the water tank and the cold plate, the second side pipeline, the cold plate and the water tank form a cooling cycle, a charging gun is detachably and electrically connected with a charging gun seat of a new energy automobile, the charging gun and a charging cable are provided with a liquid cooling flow path for heat exchange, the expansion valve, the charging gun, the charging cable and the compression mechanism form a closed refrigeration compression cycle, and the refrigeration compression cycle is at least partially arranged on the cold plate; the closed cooling tower, the pump and the primary side pipeline form a heat dissipation loop.
Description
Technical Field
The invention belongs to the technical field of charging piles, and particularly relates to a charging pile liquid cooling system and a cooling method.
Background
The new energy industry represented by electric automobiles is vigorous, the rapid development of the industry brings higher requirements to the battery rapid charging technology, meanwhile, the power increase in the rapid charging process is inevitably accompanied with the rapid increase of heat generation in the device, on one hand, the joule heat of the power element in the device is suddenly increased, on the other hand, the charging gun and the circuit are also severely heated, and particularly, the contact resistance exists at the contact pin of the charging gun, so that the higher heat flow density is caused. Therefore, a rapid and efficient heat dissipation system is needed for the electric vehicle charging device.
At present, aiming at efficient heat dissipation of the electric vehicle charging pile device, the device generates heat mainly through forced air cooling or indirect liquid cooling, and safe and high-performance operation of the charging pile device is ensured. Such as a liquid-cooled charging stake (CN 14084007 a), the charging module and the charging gun are respectively located in two inner circulation loops, which can jointly guide heat into the outer circulation cooling loop, and then the outer circulation cooling loop transfers the heat into the environment. For another example, a central liquid cooling fast charging station system (CN 112092658A) uses cooling liquid to dissipate heat for each charging pile unit, and external components such as a liquid pump, a water tank, a radiator and the like are arranged, so that the internal structure of the liquid cooling charging pile is simplified. The heat dissipation scheme and the heat dissipation device for the charging pile are complex in internal structure, waste heat and cooling liquid cannot be reused on one hand, serious resource waste is caused, and accurate temperature control of an internal power element cannot be achieved on the other hand.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore may contain information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a charging pile liquid cooling system and a cooling method, which utilize the characteristics of superhigh heat exchange rate of two-phase heat transfer and utilize the phase-change electric heat of a heat transfer working medium to absorb the heat generated by a charging gun and a charging cable; transferring heat in the charging gun liquid cooling system to a charging pile power element temperature control system by utilizing cold plate radiation; the liquid cooling plate is adopted to dissipate heat of the power element, so that the electronic element is ensured to operate at a proper temperature; distributing cooling fluid in the charging pile by using a refrigerating fluid distribution unit (CDU) and simultaneously transferring heat to an external circulation side; radiating heat of the liquid loop to the outdoor atmosphere through a closed cooling tower; and the water tank is used for storing water, so that the waste heat of the high-temperature cooling liquid is fully utilized.
The invention aims at realizing the technical scheme that the liquid cooling system of the charging pile comprises,
at least one power element temperature control system, comprising,
the charging pile body is provided with at least one radiating hole communicated with the external environment;
at least one cold plate arranged in the charging pile body;
the power element is arranged on the cold plate and comprises a heating element;
at least one fan arranged in the charging pile body to forcedly wind the inside of the charging pile body;
the water tank is arranged in the charging pile body and stores cooling fluid;
the cooling liquid distribution unit distributes cooling fluid in the charging pile body and transfers heat from the charging pile body to the external circulating cooling water system, the cooling liquid distribution unit comprises a first side pipeline communicated with the external circulating cooling water system and used for absorbing heat in the charging pile body and a second side pipeline communicated with the water tank and the cold plate, and the second side pipeline, the cold plate and the water tank form cooling circulation;
at least one charging gun cooling subsystem, comprising,
the charging gun is detachably and electrically connected with a charging gun seat of the new energy automobile, and the charging gun and the charging cable are provided with a liquid cooling flow path for heat exchange;
a compressor which communicates with the liquid cooling flow path to compress and drive the refrigerant in the liquid cooling flow path;
an expansion valve, one end of which is connected with the compressor, and the other end of which is connected with the liquid cooling flow path to reduce pressure and regulate flow of the liquid cooling flow path, wherein the expansion valve, the charging gun, the charging cable and the compressor form a closed refrigeration compression cycle, and the refrigeration compression cycle is at least partially arranged on the cold plate;
at least one external circulation cooling water system comprising,
a closed cooling tower configured to dissipate heat from an external environment;
and one end of the pump is connected with the closed cooling tower, the other end of the pump is connected with the primary side pipeline, the closed cooling tower, the pump and the primary side pipeline form a heat dissipation loop, and the pump drives a cooling medium to flow in the heat dissipation loop.
In the charging pile liquid cooling system, a power element is arranged on the cold plate through a heat sink, and a heating element comprises a capacitor, an inductor, an MOS tube and/or a transformer.
In the charging pile liquid cooling system, the refrigeration compression cycle is two-phase cooling, and the refrigerant comprises a phase-change refrigerant.
In the charging pile liquid cooling system, the refrigeration compression cycle further comprises a heat exchanger connected with the expansion plug.
In the liquid cooling system of the charging pile, the cooling fluid or the cooling medium comprises air, water, glycol solution or heat conduction oil.
In the charging pile liquid cooling system, the cooling mode of the charging cable is active cooling, and the active cooling comprises water and electricity isolation, copper-clad water or copper-clad water.
In the charging pile liquid cooling system, the cooling mode of the charging gun is isolated cooling or non-isolated cooling.
In the charging pile liquid cooling system, the cooling liquid distribution unit is arranged outside the charging pile body.
In the charging pile liquid cooling system, the cooling liquid distribution unit is internally arranged in the charging pile body, the water tank is arranged in the heat dissipation loop, the closed cooling tower, the pump, the primary side pipeline and the water tank form the heat dissipation loop, and the second side pipeline, the cold plate and the water tank form the cooling circulation.
The cooling method of the liquid cooling system of the charging pile comprises the following steps,
step S1, the charging gun is electrically connected with a new energy automobile to start charging;
s2, acquiring a first temperature value of a charging gun contact pin, a second temperature value of a charging cable, a third temperature value of a charging pile body in real time, and setting a first temperature threshold, a second temperature threshold and a third temperature threshold, wherein the first temperature threshold is smaller than the second temperature threshold, and the second temperature threshold is smaller than the third temperature threshold;
s3, cooling by means of natural convection in an initial state; when at least one of the first temperature value, the second temperature value and the third temperature value reaches a first temperature threshold, starting the charging pile liquid cooling system, and controlling the cooling liquid distribution unit to change the internal temperature of the flow control charging pile body and the heat dissipation capacity of the charging gun cooling system;
s4, when at least one of the first temperature value, the second temperature value and the third temperature value reaches a second temperature threshold, starting a fan to assist the cold plate to dissipate heat, and controlling the cooling liquid distribution unit and the fan to regulate and cool power;
s5, stopping charging and discharging of the charging gun when at least one of the first temperature value, the second temperature value and the third temperature value reaches a third temperature threshold, and continuously operating the charging pile liquid cooling system until the first temperature value, the second temperature value and the third temperature value are not higher than the first temperature threshold, and starting charging and discharging;
and S6, stopping charging when the charging quantity meets the requirement, and stopping the operation of the liquid cooling system of the charging pile.
Compared with the prior art, the invention has the following advantages: the invention has strong cooling effect. The charging gun part is cooled by two phases, so that ideal temperature control can be realized, and the temperature response is faster; simplifying the internal structure. The heat of the charging gun subsystem is taken away by utilizing the cold plate in the charging pile, and a special condenser is not needed; the power density is high. The current limit power density of a single liquid cooling plate can reach 5W/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the And the deployment and maintenance are easy. The cabinet can be closed without external heat management; the CDU is supported, and a secondary pipeline is avoided; supporting the plug-in maintenance of local nodes; the energy utilization rate is high. The liquid cooling system has high heat exchange efficiency, can recycle waste heat, and uses the water tank such as cooling liquid in the heat exchanged water tank for life use. The main heat in the charging pile can be taken away through the cooling liquid distribution unit through heat exchange by the external circulating cooling water system, and a small amount of heat is taken out through air blown by the cooling fan. Therefore, the charging gun and the work can be realized under high powerAnd the cooling of the rate element improves the charging efficiency and the safety of the charging pile.
Drawings
Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is evident that the figures described below are only some embodiments of the invention, from which other figures can be obtained without inventive effort for a person skilled in the art. Also, like reference numerals are used to designate like parts throughout the figures.
In the drawings:
fig. 1 is a schematic structural view of an external tank type liquid cooling system for a charging pile according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a liquid cooling system of a built-in frame type charging pile according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a liquid cooling system of a charging pile using an external box type cooling liquid distribution unit, a power element and a cooling subsystem of a charging gun for cooling respectively according to an embodiment of the present invention.
The invention is further explained below with reference to the drawings and examples.
Detailed Description
Specific embodiments of the present invention will be described in more detail below with reference to fig. 1 to 3. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It should be noted that certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will understand that a person may refer to the same component by different names. The description and claims do not identify differences in terms of components, but rather differences in terms of the functionality of the components. As used throughout the specification and claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description hereinafter sets forth a preferred embodiment for practicing the invention, but is not intended to limit the scope of the invention, as the description proceeds with reference to the general principles of the description. The scope of the invention is defined by the appended claims.
For the purpose of facilitating an understanding of the embodiments of the present invention, reference will now be made to the drawings, by way of example, and specific examples of which are illustrated in the accompanying drawings.
For better understanding, in one embodiment, as shown in fig. 1, a charge pile liquid cooling system includes,
at least one power element temperature control system, comprising,
the charging pile body 22 is provided with at least one radiating hole communicated with the external environment;
at least one cold plate 23 provided in the charging pile 22;
a power element 24 provided on the cold plate 23, the power element 24 including a heat generating element;
at least one fan 28 provided inside the charging pile 22 to force air-cooled inside the charging pile 22;
a water tank 29 provided in the charging pile 22, the water tank 29 storing a cooling fluid;
a cooling liquid distribution unit 21 for distributing cooling liquid in the charging pile 22 and transferring heat from the charging pile 22 to an external circulation cooling water system, wherein the cooling liquid distribution unit 21 comprises a first side pipeline communicated with the external circulation cooling water system and used for absorbing heat in the charging pile 22, and a second side pipeline communicated with the water tank 29 and the cooling plate 23, the second side pipeline, the cooling plate 23 and the water tank 29 form a cooling circulation, further, the cooling liquid in the secondary side pipeline flows into the cooling plate 23 after being cooled by the primary side pipeline, heat from the power element 24 and the charging gun cooling subsystem is taken away, and the cooling liquid flows into the water tank 29 and is absorbed by the secondary side pipeline again after flowing into the secondary side pipeline;
at least one charging gun cooling subsystem, comprising,
a charging gun and a charging cable 26, which are connected with the charging pile body 22, wherein the charging gun is detachably and electrically connected with a charging gun seat of the new energy automobile, and the charging gun and the charging cable 26 are provided with a liquid cooling flow path for heat exchange;
a compressor 27 that communicates with the liquid cooling passage to compress and drive the refrigerant in the liquid cooling passage;
an expansion valve 25 having one end connected to the compressor 27 and the other end connected to the liquid cooling passage to reduce pressure and regulate the flow rate of the liquid cooling passage, wherein the expansion valve 25, the charging gun, the charging cable 26 and the compressor 27 constitute a closed refrigeration compression cycle, and the refrigeration compression cycle is at least partially disposed on the cold plate 23;
at least one external circulation cooling water system comprising,
a closed cooling tower 11 configured to dissipate heat from the external environment;
and one end of the pump 12 is connected with the closed cooling tower 11, the other end of the pump 12 is connected with the primary side pipeline, the closed cooling tower 11, the pump 12 and the primary side pipeline form a heat dissipation loop, the pump 12 drives a cooling medium to flow in the heat dissipation loop, and further, the cooling medium from the primary side pipeline flows into the closed cooling tower 11 under the driving of the pump 12, and flows into the primary side pipeline after being cooled for continuously absorbing heat.
In the preferred embodiment of the liquid cooling system for the charging pile, the power element 24 is disposed on the cooling plate 23 via a heat sink, and the heating element includes a capacitor, an inductor, an MOS tube and/or a transformer.
In a preferred embodiment of the charging pile liquid cooling system, the refrigeration compression cycle is two-phase cooling, and the refrigerant comprises a phase-change refrigerant.
In the preferred embodiment of the charging pile liquid cooling system, the refrigeration compression cycle further comprises a heat exchanger connected with the expansion plug.
In a preferred embodiment of the electric pile liquid cooling system, the cooling fluid or the cooling medium includes air, water, glycol solution or heat conducting oil.
In the preferred embodiment of the liquid cooling system for the charging pile, the cooling mode of the charging cable is active cooling, and the active cooling comprises water and electricity isolation, copper-clad water or copper-clad water.
In the preferred embodiment of the liquid cooling system for the charging pile, the cooling mode of the charging gun is isolated cooling or non-isolated cooling.
In the preferred embodiment of the liquid cooling system for the charging pile, the cooling liquid distribution unit 21 is externally arranged on the charging pile body 22.
In the preferred embodiment of the liquid cooling system for the charging pile, the cooling liquid distribution unit 21 is built in the charging pile body 22, the water tank 29 is arranged in a heat dissipation circuit, the closed cooling tower 11, the pump 12, the primary side pipeline and the water tank 29 form a heat dissipation circuit, and the second side pipeline, the cooling plate 23 and the water tank 29 form a cooling cycle.
In one embodiment, a charge pile liquid cooling system includes:
the at least one power element temperature control system comprises at least one cold plate 23, at least one charging gun cooling subsystem, at least one power device and at least one water tank 29, wherein the at least one cooling fan 28 and the cold plate 23 are connected with the cooling liquid distribution unit 21;
the charging gun cooling subsystem comprises a charging gun and charging wire, a compressor 27, a heat exchanger and an expansion valve 25;
at least one coolant distribution unit 21 (CDU) having a main function of distributing a flow rate of the liquid to transfer heat from the pile body to the external circulation cooling water system;
at least one external circulation cooling water system comprising a circulation pump 12, a closed cooling tower 11, and a cooling liquid distribution unit 21;
the water tank 29 is connected with an energy-saving unit, and can provide high-temperature hot water for waste heat utilization according to requirements, and the hot water can be used for domestic water, fire protection or facilities such as a hydrogenation station and the like.
In one embodiment, the cooling medium used in the circulating cooling water system may be air, water, glycol solution, heat conducting oil, etc.; the cooling medium adopted by the power element temperature control system can be air, water, glycol solution, heat conducting oil and the like; the cooling medium for the charging gun cooling system can be two-phase cooling liquid such as R134a, ammonia, supercritical CO2 and the like. Besides the main working medium, a proper amount of additive should be added to lubricate, prevent the corrosion of the pipeline and inhibit the growth of bacteria.
In one embodiment, the wires in the charging gun and the charging cable 26 are the main heat generating components, and the active cooling pipe can select direct cooling or indirect cooling according to the thermal and electrical properties of the two-phase cooling liquid.
In this embodiment, the liquid cooling system for the charging pile may have 2 setting forms:
in the first arrangement, as shown in fig. 1 and 2, the cooling liquid distribution unit 21 may be externally or internally arranged according to the requirement, and when the cooling liquid distribution unit 21 is externally arranged, the physical structure of the cooling liquid distribution unit is in a cabinet or box shape; the physical structure is frame-type when the coolant distribution unit 21 is built in, and the system is integrated inside the cabinet.
In the second arrangement, as in fig. 1 and 3, the cooling elements may be scattered like the first cooling plate 231 and the second cooling plate 232 in fig. 3, or may be combined like the cooling plate 23 in fig. 1, depending on the specific situation.
The invention adopts a high-efficiency cooling mode of two-phase cooling to cope with the severe heat exchange condition of the charging gun and the charging wire; the full liquid cooling machine box is adopted, an air conditioner is not required to be arranged outside the equipment, and the defects of high air cooling noise, poor effect and low service life of a fan are avoided; and the waste heat is recycled, so that the energy utilization efficiency is further improved.
In one embodiment, at least one external circulation cooling water system includes: a closed cooling tower 11, a pump 12 and a primary side pipeline of a cooling liquid distribution unit 21, wherein the closed cooling tower 11 is used for radiating heat with the external environment, and the pump 12 is used for driving cooling water to flow in an external circulating cooling water system; the primary side pipeline in the cooling liquid distribution unit 21 is used for absorbing heat in the charging pile body; the cooling liquid in the primary side pipeline in the cooling liquid distribution unit 21 takes away the cooling water in the secondary side pipeline, the high-temperature cooling liquid flows into the closed cooling tower under the driving of the pump 12, and the cooled water flows into the cooling liquid distribution unit 21 for continuous heat exchange.
The at least one power element temperature control system comprises: the cooling liquid distribution unit 21, the charging pile body 22, at least one cold plate 23 in the charging pile body, a power element 24 arranged on the cold plate, a fan 28, a water tank 29 and a charging gun cooling subsystem, wherein the cooling liquid distribution unit 21 is used for distributing heat to an external circulation system and distributing cooling liquid flow and pressure, the charging pile body is used for supporting and protecting internal elements, the power element 24 comprises heating elements such as a capacitor, an inductor, a MOS (metal oxide semiconductor) tube and a transformer, the cold plate 23 is connected with the power element through a heat sink, the charging gun cooling subsystem is used for transmitting heat of a charging gun and a charging cable into the charging pile, the fan 28 is used for forcing the internal elements of the charging pile and directly distributing the heat to the surrounding environment through a radiating hole of the charging pile body 22, and the water tank 29 stores high-temperature cooling water; the secondary side pipeline of the cooling liquid distribution unit 21 flows into the cold plate after being cooled by the primary side cooling liquid, takes away heat from the power element and the charging gun cooling subsystem, and the high-temperature cooling liquid flows into the cooling liquid distribution unit 21 for circulation.
The at least one charging gun cooling system element comprises: the charging gun and charging cable 26 is connected with a charging gun seat of a new energy automobile through active cooling, the cooling mode of the charging cable can be water and electricity isolation, "copper-clad water" or "copper-clad water", whether cooling liquid is in direct contact with a conductor or not can be selected according to the conductivity of cooling liquid, the cooling mode of a charging gun head can be selected to be in isolation cooling design or non-isolation cooling setting according to actual conditions, the specific cooling liquid flowing direction can be one inlet and one outlet or two inlets and two outlets, the charging gun and the charging cable 26 are used for compressing and driving a refrigerant, and the charging gun cooling system is in a closed refrigeration compression cycle and adopts a two-phase working medium.
The high-temperature cooling water in the water tank 29 can be used for waste heat utilization, such as domestic water, fire protection, or heating liquid hydrogen in cooperation with a hydrogen adding station, etc., and the water tank 29 is connected with the waste heat utilization part 31.
The cooling method of the liquid cooling system of the charging pile comprises the following steps,
step S1, the charging gun is electrically connected with a new energy automobile to start charging;
s2, collecting a first temperature value of a charging gun contact pin, a second temperature value of a charging cable, a third temperature value of a charging pile body 22 and setting a first temperature threshold, a second temperature threshold and a third temperature threshold in real time, wherein the first temperature threshold is smaller than the second temperature threshold, and the second temperature threshold is smaller than the third temperature threshold;
s3, cooling by means of natural convection in an initial state; when at least one of the first temperature value, the second temperature value and the third temperature value reaches a first temperature threshold, starting the charging pile liquid cooling system, and controlling the cooling liquid distribution unit 21 to change the internal temperature of the flow control charging pile body 22 and the heat dissipation capacity of the charging gun cooling system;
step S4, when at least one of the first temperature value, the second temperature value and the third temperature value reaches a second temperature threshold, a fan 28 is started to assist the cold plate 23 to dissipate heat, and the power regulation and cooling of the cooling liquid distribution unit 21 and the fan 28 is controlled;
s5, stopping charging and discharging of the charging gun when at least one of the first temperature value, the second temperature value and the third temperature value reaches a third temperature threshold, and continuously operating the charging pile liquid cooling system until the first temperature value, the second temperature value and the third temperature value are not higher than the first temperature threshold, and starting charging and discharging;
and S6, stopping charging when the charging quantity meets the requirement, and stopping the operation of the liquid cooling system of the charging pile.
In one embodiment, the cooling method comprises,
and S1, after the charging gun is connected with the electric automobile, performing insulation self-checking of a charger, acquiring charging and discharging parameters of the electric automobile through a charging handshake protocol, and starting charging.
And S2, acquiring temperature values of the charging gun pins, the charging cables and the charging pile body 22 in real time through a temperature sensor, performing cooling control based on the measured node temperature, and setting three temperature thresholds, wherein the first temperature threshold to the third temperature threshold are respectively 60 ℃,75 ℃ and 90 ℃.
S2, the liquid cooling system is not started in an initial state and is cooled only by natural convection; when the data transmitted by one temperature sensor of the three parts reaches a first temperature threshold, a liquid cooling system is started, a cooling liquid distribution unit is controlled by adopting modes such as PID control and the like, and the temperature of a power element 24 in the charging pile body and the heat dissipation capacity of a charging gun cooling system are controlled by changing the flow;
step S3, when the data transmitted by a certain temperature sensor of the three parts reaches a second temperature threshold, a fan auxiliary cold plate 23 is started to radiate heat, and the cooling liquid distribution unit and the fan power are controlled in a PID control mode to radiate heat of the charging pile system;
and S4, when the data transmitted by one of the temperature sensors of the three parts reaches a third temperature threshold, stopping charging and discharging of the electric automobile, and continuously operating the liquid cooling system until the data measured by each temperature sensor reaches the first temperature threshold, and starting charging and discharging of the electric automobile.
And S5, stopping charging when the charging quantity meets the requirement of a user, and stopping the cooling system.
Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described specific embodiments and application fields, and the above-described specific embodiments are merely illustrative, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous forms of the invention without departing from the scope of the invention as claimed.
Claims (10)
1. A liquid cooling system of a charging pile is characterized by comprising,
at least one power element temperature control system, comprising,
the charging pile body is provided with at least one radiating hole communicated with the external environment;
at least one cold plate arranged in the charging pile body;
the power element is arranged on the cold plate and comprises a heating element;
at least one fan arranged in the charging pile body to forcedly wind the inside of the charging pile body;
the water tank is arranged in the charging pile body and stores cooling fluid;
the cooling liquid distribution unit distributes cooling fluid in the charging pile body and transfers heat from the charging pile body to the external circulating cooling water system, the cooling liquid distribution unit comprises a first side pipeline communicated with the external circulating cooling water system and used for absorbing heat in the charging pile body and a second side pipeline communicated with the water tank and the cold plate, and the second side pipeline, the cold plate and the water tank form cooling circulation;
at least one charging gun cooling subsystem, comprising,
the charging gun is detachably and electrically connected with a charging gun seat of the new energy automobile, and the charging gun and the charging cable are provided with a liquid cooling flow path for heat exchange;
a compressor which communicates with the liquid cooling flow path to compress and drive the refrigerant in the liquid cooling flow path;
an expansion valve, one end of which is connected with the compressor, and the other end of which is connected with the liquid cooling flow path to reduce pressure and regulate flow of the liquid cooling flow path, wherein the expansion valve, the charging gun, the charging cable and the compressor form a closed refrigeration compression cycle, and the refrigeration compression cycle is at least partially arranged on the cold plate;
at least one external circulation cooling water system comprising,
a closed cooling tower configured to dissipate heat from an external environment;
and one end of the pump is connected with the closed cooling tower, the other end of the pump is connected with the primary side pipeline, the closed cooling tower, the pump and the primary side pipeline form a heat dissipation loop, and the pump drives a cooling medium to flow in the heat dissipation loop.
2. The charging pile liquid cooling system according to claim 1, wherein preferably, the power element is arranged on the cold plate via a heat sink, and the heating element comprises a capacitor, an inductor, a MOS tube and/or a transformer.
3. The fill column liquid cooling system of claim 1 wherein the refrigeration compression cycle is two-phase cooling and the refrigerant comprises a phase change refrigerant.
4. The fill column liquid cooling system of claim 1 wherein the refrigeration compression cycle further comprises a heat exchanger connected to the expansion plug.
5. The fill pile liquid cooling system of claim 1, wherein the cooling fluid or the cooling medium comprises air, water, glycol solution, or heat transfer oil.
6. The fill level liquid cooling system of claim 1 wherein the cooling of the fill cable is active cooling comprising water and electricity isolation, copper-in-water or copper-in-water.
7. The fill level liquid cooling system of claim 1 wherein the fill level gun is cooled in an isolated or non-isolated manner.
8. The charging pile liquid cooling system according to claim 1, wherein the cooling liquid distribution unit is externally arranged on the charging pile body.
9. The liquid cooling system of claim 1, wherein the cooling liquid distribution unit is built in the charging pile body, the water tank is arranged in a heat dissipation loop, the closed cooling tower, the pump, the primary side pipeline and the water tank form a heat dissipation loop, and the second side pipeline, the cooling plate and the water tank form a cooling cycle.
10. The cooling method of the liquid cooling system for charging pile according to any one of claims 1 to 9, comprising the steps of,
step S1, the charging gun is electrically connected with a new energy automobile to start charging;
s2, acquiring a first temperature value of a charging gun contact pin, a second temperature value of a charging cable, a third temperature value of a charging pile body in real time, and setting a first temperature threshold, a second temperature threshold and a third temperature threshold, wherein the first temperature threshold is smaller than the second temperature threshold, and the second temperature threshold is smaller than the third temperature threshold;
s3, cooling by means of natural convection in an initial state; when at least one of the first temperature value, the second temperature value and the third temperature value reaches a first temperature threshold, starting the charging pile liquid cooling system, and controlling the cooling liquid distribution unit to change the internal temperature of the flow control charging pile body and the heat dissipation capacity of the charging gun cooling system;
s4, when at least one of the first temperature value, the second temperature value and the third temperature value reaches a second temperature threshold, starting a fan to assist the cold plate to dissipate heat, and controlling the cooling liquid distribution unit and the fan to regulate and cool power;
s5, stopping charging and discharging of the charging gun when at least one of the first temperature value, the second temperature value and the third temperature value reaches a third temperature threshold, and continuously operating the charging pile liquid cooling system until the first temperature value, the second temperature value and the third temperature value are not higher than the first temperature threshold, and starting charging and discharging;
and S6, stopping charging when the charging quantity meets the requirement, and stopping the operation of the liquid cooling system of the charging pile.
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| CN202310302108.5A CN116424124A (en) | 2023-03-27 | 2023-03-27 | Charging pile liquid cooling system and cooling method |
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| CN202310302108.5A CN116424124A (en) | 2023-03-27 | 2023-03-27 | Charging pile liquid cooling system and cooling method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117002296A (en) * | 2023-09-18 | 2023-11-07 | 广东天枢新能源科技有限公司 | Liquid cooling variable flow control method and system for charging pile |
| CN117162827A (en) * | 2023-11-02 | 2023-12-05 | 威胜信息技术股份有限公司 | Heat radiation structure and heat radiation system for direct current charging pile |
| CN117922339A (en) * | 2024-03-22 | 2024-04-26 | 南京瑞凡达新能源科技有限公司 | Fill electric pile equipment of circulating accuse temperature |
| CN117944483A (en) * | 2024-03-11 | 2024-04-30 | 广东海洋大学 | Direct current fills electric pile cooling structure and fills electric pile |
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2023
- 2023-03-27 CN CN202310302108.5A patent/CN116424124A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117002296A (en) * | 2023-09-18 | 2023-11-07 | 广东天枢新能源科技有限公司 | Liquid cooling variable flow control method and system for charging pile |
| CN117002296B (en) * | 2023-09-18 | 2024-04-12 | 广东天枢新能源科技有限公司 | Liquid cooling variable flow control method and system for charging pile |
| CN117162827A (en) * | 2023-11-02 | 2023-12-05 | 威胜信息技术股份有限公司 | Heat radiation structure and heat radiation system for direct current charging pile |
| CN117162827B (en) * | 2023-11-02 | 2023-12-29 | 威胜信息技术股份有限公司 | Heat radiation structure and heat radiation system for direct current charging pile |
| CN117944483A (en) * | 2024-03-11 | 2024-04-30 | 广东海洋大学 | Direct current fills electric pile cooling structure and fills electric pile |
| CN117922339A (en) * | 2024-03-22 | 2024-04-26 | 南京瑞凡达新能源科技有限公司 | Fill electric pile equipment of circulating accuse temperature |
| CN117922339B (en) * | 2024-03-22 | 2024-06-18 | 南京瑞凡达新能源科技有限公司 | Fill electric pile equipment of circulating accuse temperature |
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