CN116494805B - Charging device, charging system, and charging control method - Google Patents
Charging device, charging system, and charging control method Download PDFInfo
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- CN116494805B CN116494805B CN202310740536.6A CN202310740536A CN116494805B CN 116494805 B CN116494805 B CN 116494805B CN 202310740536 A CN202310740536 A CN 202310740536A CN 116494805 B CN116494805 B CN 116494805B
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- 238000001816 cooling Methods 0.000 claims abstract description 156
- 238000006243 chemical reaction Methods 0.000 claims abstract description 118
- 239000007788 liquid Substances 0.000 claims abstract description 112
- 230000005540 biological transmission Effects 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 27
- 238000010586 diagram Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 239000000110 cooling liquid Substances 0.000 description 6
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- 230000004044 response Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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
- B60L53/31—Charging columns specially adapted for electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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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
- B60L53/60—Monitoring or controlling charging stations
-
- 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
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- 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 application relates to a charging device, a charging system and a charging control method. The charging device comprises a first type charging pile and at least two second type charging piles; the first type charging pile comprises a first type alternating-direct conversion module group and a liquid cooling charging gun; the first alternating-current-direct-current conversion module group is connected with the liquid-cooling charging gun; the output power of the first alternating-direct conversion module group is smaller than the maximum support power of the liquid cooling charging gun; the sum of the output power of the first type charging pile and the second type charging pile is larger than the maximum support power of the liquid cooling charging gun; after the output power of two or more second-type charging piles is switched to the first-type charging piles, the power which can be transmitted by the liquid cooling charging gun is larger than the sum of the power of the first-type alternating-direct conversion module group and any switched second-type charging pile. The application avoids the problem of high cost caused by directly constructing the super charging pile, can gradually reform the existing constructed charging station to improve the output power, and fully utilizes the resources.
Description
Technical Field
The application relates to the technical field of charging piles, in particular to a charging device, a charging system and a charging control method.
Background
With the gradual implementation of new energy planning by the country and the increasing demands for implementation and application of new energy, new energy charging piles are listed in the fourth large field of the seven new capital construction fields in China. Therefore, the new energy charging station needs to continuously meet the increasing demand for the new energy automobile charging pile, which is a problem to be solved by the current charging station. At present, the following problems still exist in the existing charging station technology for the requirements of new energy charging piles:
1. the charging rate of electric vehicles is increasing, so that the charging equipment needs to be updated at an increasing speed, and the built charging equipment is difficult to upgrade to new charging equipment with higher power.
2. The high-power quick charging and super charging pile has high cost and is difficult to popularize.
3. The construction of new equipment such as a charging pile containing super fast charging is basically equivalent to the construction of a new charging station again, and the equipment which is already put into use is difficult to use.
Disclosure of Invention
Based on this, it is necessary to provide a charging device, a charging system and a charging control method for the problem that the conventional charging pile cannot meet the faster and faster charging requirements.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a charging device, including a first type charging pile and at least two second type charging piles; the first type charging pile comprises a first type alternating-direct conversion module group and a liquid cooling charging gun; the first alternating-current-direct-current conversion module group is connected with the liquid-cooling charging gun;
the power transmission port of the first type charging pile is connected with the power transmission port of the second type charging pile; the second type of charging piles which are directly connected are connected through power transmission ports of the second type of charging piles;
the first type charging piles and the second type charging piles which are directly connected are in communication connection, and the second type charging piles which are directly connected are in communication connection;
the output power of the first alternating-direct conversion module group is smaller than the maximum support power of the liquid cooling charging gun; the sum of the output power of the first type charging pile and the second type charging pile is larger than the maximum support power of the liquid cooling charging gun; after the output power of two or more second-type charging piles is switched to the first-type charging piles, the power which can be transmitted by the liquid cooling charging gun is larger than the sum of the power of the first-type alternating-direct conversion module group and any switched second-type charging pile.
In one embodiment, the first type charging pile further comprises a first alternating current input module, a liquid cooling module and a plurality of first type direct current contactor groups;
the first alternating current input module is connected with the first alternating current-direct current conversion module group and is used for being connected with an alternating current power supply;
the first type AC-DC conversion module group is connected with the liquid cooling charging gun through the first type DC contactor group; the liquid cooling charging gun is connected with the liquid cooling module;
a first type direct current contactor group is connected between the first type alternating current-direct current conversion module and the power transmission port of the first type charging pile.
In one embodiment, the liquid cooling module comprises an oil pump, an oil tank, a fan, a radiator and a liquid cooling controller; the liquid cooling charging gun comprises a liquid cooling pipeline;
the oil pump is communicated with the liquid cooling pipeline; the liquid cooling pipeline is communicated with the radiator; the radiator is communicated with an oil tank which is connected with an oil pump;
the liquid cooling controller is respectively connected with the fan and the oil pump; the fan delivers or draws air to the radiator when activated.
In one embodiment, the first-type charging pile further comprises a second-type alternating-current-to-direct-current conversion module group, a second-type direct-current contactor group and a natural cooling charging gun; the natural cooling charging gun is used for transmitting charging power below 250 kilowatts;
The first alternating current input module is connected with the second type alternating current-direct current conversion module group; the second type AC-DC conversion module group is connected with the natural cooling charging gun through the second type DC contactor group;
a first type direct current contactor group is connected between the first type alternating current-direct current conversion module group and the second type alternating current-direct current conversion module group; after the output power of two or more second-type charging piles and the output power of the natural cooling charging gun are switched to the first-type charging piles, the liquid cooling charging gun can transmit more power than the sum of the power of the first-type alternating-current/direct-current conversion module group, the power of the second-type alternating-current/direct-current conversion module group and the power of any switched second-type charging pile.
In one embodiment, the second type of charging pile comprises a second alternating current input module, a third type of alternating current-direct current conversion module group, a natural cooling charging gun and a plurality of third type of direct current contactor groups; the natural cooling charging gun is used for transmitting charging power below 250 kilowatts;
the second alternating current input module is connected with a third alternating current-direct current conversion module group and is used for being connected with an alternating current power supply;
the third type of alternating-current-direct-current conversion module group is connected with the natural cooling charging gun through the third type of direct-current contactor group; a third type of direct current contactor group is connected between the third type of alternating current-direct current conversion module groups;
And a third type direct current contactor is connected between the third type alternating current-direct current conversion module group and the power transmission port of the second type charging pile.
In one embodiment, a first type of charging stake includes a first charging control module; the second type of charging piles comprise a second charging control module;
the first charging control module is connected with the liquid cooling charging gun, the liquid cooling module and the first direct current contactor group of the first type charging pile;
the second charging control module is connected with a third type of direct current contactor group and a natural cooling charging gun;
the first charging control module is in communication connection with the second charging control module between the first type charging pile and the second type charging pile which are directly connected; and a second charging control communication connection between the directly connected second type of charging piles.
On the other hand, the embodiment of the application provides a charging system, which comprises N charging devices;
the charging device is sequentially connected with communication and power to form a chain charging structure; in the chain charging structure, at least one second type charging pile is connected between adjacent first type charging piles.
In one embodiment, in the chain charging structure, the head charging pile and the tail charging pile are in power and communication connection; the head charging piles are the first type charging piles or the second type charging piles; the tail charging piles are the first type charging piles or the second type charging piles.
In still another aspect, an embodiment of the present application provides a charging control method, which is applied to a charging device, where the charging device includes a first type charging pile and at least two second type charging piles; the first type charging pile comprises a first type alternating-direct conversion module group and a liquid cooling charging gun; the first alternating-current-direct-current conversion module group is connected with the liquid-cooling charging gun; the power transmission port of the first type charging pile is connected with the power transmission port of the second type charging pile; and/or the second type charging pile is connected through a power transmission port of the second type charging pile; the first type charging piles and the second type charging piles which are directly connected are in communication connection, and the second type charging piles which are directly connected are in communication connection; the first type of charging piles are connected with a charging vehicle; the output power of the first alternating-direct conversion module group is smaller than the maximum support power of the liquid cooling charging gun; the sum of the output power of the first type charging pile and the second type charging pile is larger than the maximum support power of the liquid cooling charging gun; after the output power of the second type charging pile is switched to the first type charging pile, the power which can be transmitted by the liquid cooling charging gun is larger than the sum of the power of the first type alternating-current and direct-current conversion module group and any switched second type charging pile;
The method comprises the following steps:
when charging demand power sent by a charging vehicle is received, judging whether the charging demand power is larger than the output power of the first type AC-DC conversion module;
if the charging demand power is larger than the output power of the first class AC-DC conversion module, searching an idle second class charging pile;
if the idle second-type charging pile exists, a control instruction is sent to the idle second-type charging pile which meets the charging demand power by the sum of the output power of the first-type charging pile, so that the idle second-type charging pile is instructed to switch the output power to the first-type charging pile;
if the idle second-type charging pile does not exist or the idle second-type charging pile cannot meet the charging demand power, a control instruction is sent to the second-type charging pile in a charging state to instruct the second-type charging pile in the charging state to enter a waiting charging state, and output power is switched to the first-type charging pile.
In one embodiment, the first type of charging stake includes a liquid cooled charging gun and a naturally cooled charging gun; the liquid cooling charging gun is connected with a charging vehicle;
the method comprises the following steps:
when receiving the charging demand power sent by the charging vehicle through the liquid cooling charging gun, judging whether the charging demand power is larger than the output power of the first type AC-DC conversion module;
If the charging demand power is larger than the output power of the first type AC-DC conversion module, controlling the natural cooling charging gun to enter a waiting charging state, and switching the output power of the corresponding second type AC-DC conversion module to the liquid cooling charging gun;
if the sum of the output power of the liquid cooling charging gun and the natural cooling charging gun can not meet the charging demand power, searching for an idle second type charging pile;
if the idle second-type charging pile exists, a control instruction is sent to the idle second-type charging pile which meets the charging demand power by the sum of the output power of the first-type charging pile, so that the idle second-type charging pile is instructed to switch the output power to the first-type charging pile;
if the idle second-type charging pile does not exist or the idle second-type charging pile cannot meet the charging demand power, a control instruction is sent to the second-type charging pile in a charging state to instruct the second-type charging pile in the charging state to enter a waiting charging state, and output power is switched to the first-type charging pile.
One of the above technical solutions has the following advantages and beneficial effects:
the charging device provided by the embodiments of the application comprises a first type charging pile and at least two second type charging piles. A power connection and a communication connection exist between the first type of charging pile and the second type of charging pile. The output power of the first alternating-direct conversion module group is smaller than the maximum support power of the liquid cooling charging gun. The sum of the output power of the first type charging pile and the second type charging pile is larger than the maximum support power of the liquid cooling charging gun. After the output power of two or more second-type charging piles is switched to the first-type charging piles, the power which can be transmitted by the liquid cooling charging gun is larger than the sum of the power of the first-type alternating-current-direct-current conversion module group and the power of any switched second-type charging pile. In the practical application process, the second type of charging pile is a built charging pile, but the super charging requirement cannot be met. The first type fills electric pile for adding the electric pile that fills that installs for utilize the liquid cooling to fill electric gun and provide super charge, but the electric pile that fills of first type alone is unable direct super charge that provides, and the power that liquid cooling fills electric gun output when alone is less than super requirement that charges, needs to throw the output of second type to the electric pile that fills of first type when needing super charge on in order to promote the output of liquid cooling and fill electric pile, thereby reaches the demand that dashes super charge. By utilizing the structure of the charging device, the problem of high cost caused by directly constructing the super charging pile is avoided, meanwhile, the existing constructed charging station can be gradually transformed to improve the output power, resources are fully utilized, the resource waste is avoided, the gradual popularization of super charging is facilitated, and the resource waste caused by directly constructing the super charging station due to low current super charging requirement is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a charging device according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a charging device according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a first type of charging pile according to the embodiment of the present application.
Fig. 4 is a schematic structural diagram of another first type of charging pile according to the embodiment of the present application.
Fig. 5 is a schematic structural diagram of a second type of charging pile according to the embodiment of the present application.
Fig. 6 is a schematic structural diagram of a second type of charging pile according to the embodiment of the present application.
Fig. 7 is a schematic structural diagram of a charging system according to an embodiment of the present application.
Fig. 8 is a schematic diagram of another structure of a charging system according to an embodiment of the present application.
Fig. 9 is a schematic flow chart of a charging control method according to an embodiment of the present application.
Fig. 10 is a schematic flow chart of a charging control method according to an embodiment of the present application.
Reference numerals:
11. a first type of charging stake; 111. a first type of alternating-direct conversion module group; 113. liquid cooling charging gun; 115. a first ac input module; 117. a liquid cooling module; 119. a first type of dc contactor set; 121. a second class of ac-dc conversion module set; 123. a second type of dc contactor set; 125. naturally cooling the charging gun; 127. a first charge control module; 51. an oil pump; 53. an oil tank; 55. a fan; 57. a heat sink; 59. a liquid cooling controller; 13. a second type of charging pile; 131. a second ac input module; 133. a third type of ac-dc conversion module group; 135. a third type of dc contactor group; 137. and a second charge control module.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In order to solve the following problems in the conventional charging pile technology: 1. the charging rate of the electric automobile is faster and faster, so that the charging equipment is required to be updated at a faster and faster speed, and the built charging equipment is difficult to upgrade into new charging equipment with higher power; 2. the high-power quick charging and super charging pile has high cost and is difficult to popularize; 3. the construction of new equipment such as a charging pile containing super fast charging is basically equivalent to the construction of a new charging station again, and the equipment which is already put into use is difficult to use. In one embodiment, as shown in fig. 1, a charging device is provided, comprising one charging peg 11 of a first type and at least two charging pegs 13 of a second type. The second type of charging pile 13 may be a fast charging pile that has been constructed, and in general, the output power of the second type of charging pile 13 is 250 kw at the maximum, but cannot meet the requirement of super charging. To boost the charging power and the charging speed to meet the requirement of super charging (for example, the required power is 300 kw, or even greater), the first type charging pile 11 is constructed, the first type charging pile 11 is connected with the second type charging pile 13, and when super charging is required in the actual use process, the output power of the second type charging pile 13 is switched to the first type charging pile 11. Specifically, the power transfer ports of the first type of charging piles 11 are connected to the power transfer ports of the second type of charging piles 13. The directly connected second type charging piles 13 are connected through power transmission ports of the second type charging piles 13, for example, as shown in fig. 2, when the second type charging piles 13 are three, two of the second type charging piles 13 are directly connected to the first type charging pile 11, and the remaining one second type charging pile 13 is connected to one of the second type charging piles 13 connected to the first type charging pile 11. It should be noted that, of course, each second type charging pile 13 is directly connected to the first type charging pile 11, or, some second type charging piles 13 are directly connected to the first type charging pile 11, and some second type charging piles 13 are directly connected to each other. Of course, in order to realize data and signal interaction between the first type charging pile 11 and the second type charging pile 13 and between the second type charging pile 13, communication connection exists between the directly connected first type charging pile 11 and the second type charging pile 13, and communication connection exists between the directly connected second type charging pile 13. It should be noted that super-charging refers to charging a charged vehicle with a great power, for example, 300 kw or more, or even more.
In the super charging process, a large amount of heat is generated, and as shown in fig. 3, the first type charging pile 11 includes a first type ac/dc conversion module set 111 and a liquid cooling charging gun 113, where the first type ac/dc conversion module set 111 is connected to the liquid cooling charging gun 113. The first ac-dc conversion module set 111 is configured to convert ac power into dc power and transmit the dc power to the liquid-cooled charging gun 113, and the liquid-cooled charging gun 113 emits heat emitted by the charging gun during charging by using a cooling liquid.
On the one hand, in order to boost the charging power to reach the super charging requirement, on the other hand, in order to avoid the cost increase caused by directly constructing the super charging pile. For this reason, the output power of the first ac/dc conversion module group 111 is smaller than the maximum support power of the liquid-cooled charging gun 113. Although the maximum supported power of the liquid-cooled charging gun 113 meets the power requirement of super charging (that is, the liquid-cooled charging gun 113 has the capability of transmitting the power for super charging, but the power provided by the first type ac-dc conversion module group 111 cannot meet the requirement of super charging), the output power provided by the first type ac-dc conversion module group 111 of the first type charging pile 11 is smaller than the maximum supported power, and the first type charging pile 11 alone cannot provide super charging, so that the construction cost of the first type charging pile 11 is reduced. And the sum of the output powers of the first type charging pile 11 and the second type charging pile 13 is larger than the maximum supporting power of the liquid cooling charging gun 113. The output power of the second type charging pile 13 is switched to the first type charging pile 11, so that the output power of the liquid cooling charging gun 113 is the sum of the output power of the first type charging pile 11 and the output power of the second type charging pile 13, and the super charging requirement is met. Therefore, the second-type charging pile 13 is effectively utilized, the second-type charging pile 13 is changed into a charging pile capable of providing super charging, the waste of resources is avoided, and the problem that the second-type charging pile 13 is difficult to upgrade and reform is also solved. After the output power of two or more second type charging piles 13 is switched to the first type charging pile 11, the power transmittable by the liquid cooling charging gun 113 is larger than the sum of the power of the first type ac-dc conversion module group and any switched second type charging pile, for example, the liquid cooling charging gun 113 transmits 300 kw of output power for super charging the charging vehicle, and of course, may also transmit 300 kw of output power for super charging the charging vehicle.
In one embodiment, as shown in fig. 3, the first type charging pile 11 further includes a first ac input module 115, a liquid cooling module 117, and a plurality of first type dc contactor groups 119. The first ac input module 115 is used for switching in three-phase ac. The liquid cooling module 117 is used for injecting the circulating cooling liquid into the liquid cooling charging gun 113. The first type of dc contactor group 119 is used to control the switching of a line, and in one example, the first type of dc contactor group 119 includes a first dc contactor and a second dc contactor. The first direct current contactor is connected between the cathodes on the line, and the second direct current contactor is connected between the anodes on the line. The number of the first type of dc contactor groups 119 is set according to the actual requirement of the circuit.
The first ac input module 115 is connected to the first ac-dc conversion module set 111, and the first ac input module 115 is used for accessing an ac power source. The first type ac-dc conversion module group 111 is connected to the liquid-cooled charging gun 113 through the first type dc contactor group 119; the liquid cooling charging gun 113 is connected with a liquid cooling module 117; a first type dc contactor group 119 is connected between the first type ac-dc conversion module and the power transmission port of the first type charging pile 11.
In one example, as shown in fig. 4, the first type charging pile 11 further includes a second type ac-dc conversion module group 121, a second type dc contactor group 123, and a natural cooling charging gun 125. The second ac/dc conversion module 121 is configured to convert ac power into dc power, and is connected to the natural cooling charging gun 125, and provides charging power for the charging vehicle through the natural cooling charging gun 125. The natural cooling charging gun 125 is used to deliver a charging power of less than 250 kw. The second type dc contactor group 123 is used to control the connection and disconnection of the line, and in one example, the second type dc contactor group 123 includes a third dc contactor and a fourth dc contactor. The third DC contactor is connected between the cathodes of the lines, and the fourth DC contactor is connected between the anodes of the lines. The number of the second type of dc contactor groups 123 is set according to the actual requirements of the circuit.
The first ac input module 115 is connected to the second ac-dc conversion module set 121. The second ac-dc conversion module set 121 is connected to the natural cooling charging gun 125 through the second dc contactor set 123. A first type dc contactor group 119 is connected between the first type ac-dc conversion module group 111 and the second type ac-dc conversion module group 121. After the output power of two or more second-type charging piles 13 and/or the output power of the natural cooling charging gun 125 are/is switched to the first-type charging pile 11, the power transmittable by the liquid cooling charging gun 113 is greater than the sum of the power of the first-type ac-dc conversion module group, the power of the second-type ac-dc conversion module group and the power of any one of the switched second-type charging piles, for example, the charging power is greater than 250 kw.
In one example, as shown in fig. 5, the liquid cooling module 117 includes an oil pump 51, an oil tank 53, a fan 55, a radiator 57, and a liquid cooling controller 59; the liquid-cooled charging gun 113 includes a liquid-cooled conduit. The oil pump 51 is communicated with the liquid cooling pipeline; the liquid cooling pipeline is communicated with the radiator 57; the radiator 57 communicates with the oil tank 53, and the oil tank 53 is connected to the oil pump 51. The liquid cooling controller 59 is connected to the fan 55 and the oil pump 51, respectively. The fan 55 delivers or draws air to the radiator 57 when activated. The oil pump 51 is used to supply power to cause the coolant to circulate in the pipe. The oil tank is used for storing cooling liquid. The fan 55 is used for supplying air to the radiator 57 and radiating heat therefrom. The radiator 57 is used for heat exchange to cool the coolant. The liquid cooled controller 59 is used to provide control. The oil pump 51 pumps the cooling liquid in the oil tank 53 into the liquid cooling pipeline of the liquid cooling charging gun 113, the cooling liquid in the liquid cooling pipeline takes away the heat generated by the liquid cooling gun and self-heats, and the cooling liquid in the liquid cooling pipeline after heating flows through the radiator to cool and then flows back into the oil tank 53.
In one example, as shown in fig. 5, the second type of charging stake 13 includes a second ac input module 131, a third type of ac-to-dc conversion module group 133, a natural cooling charging gun 125, and a plurality of third type of dc contactor groups 135. The second ac input module 131 is used for switching in three-phase ac. The third ac/dc conversion module group 133 is used for converting ac power into dc power, and providing charging power to the charging vehicle through the natural cooling charging gun 125 together with the natural cooling charging gun 125. The second type of dc contactor group 123 is used to control the switching of the line, and in one example, the third type of dc contactor group 135 includes a fifth dc contactor and a sixth dc contactor. The fifth direct current contactor is connected between the cathodes of the lines, and the sixth direct current contactor is connected between the anodes of the lines. The number of the third type of dc contactor groups 135 is set according to the actual requirement of the circuit. The natural cooling charging gun 125 is used for transmitting charging power below 250 kilowatts;
the second ac input module 131 is connected to the third ac-dc conversion module group 133, and the second ac input module 131 is used for accessing an ac power supply. The third ac-dc conversion module group 133 is connected to the natural cooling charging gun 125 through the third dc contactor group 135; a third type of dc contactor set 135 is connected between the third type of ac-dc conversion module set 133. A third type of dc contactor set 135 is connected between the third type of ac-dc conversion module set 133 and the power transmission port of the second type of charging pile 13.
To enable control of the first type of charging stake 11 and the second type of charging stake 13, in one example, as shown in fig. 6, the first type of charging stake 11 includes a first charging control module 127. The second type of charging stake 13 includes a second charging control module 137. The first charge control module 127 is connected to the liquid-cooled charging gun 113, the liquid-cooled module 117, and the first-type dc contactor group 119 of the first-type charging pile 11. The second charge control module 137 connects the third type of dc contactor set 135 with the natural cooling charging gun 125. Wherein, the first charging control module 127 between the first type charging pile 11 and the second type charging pile 13 which are directly connected is in communication connection with the second charging control module 137; a second charging control communication connection between the directly connected second type of charging piles 13. It should be noted that, the first charge control module 127 is a single chip microcomputer, a system on a chip, a PLC (Programmable Logic Controller, a programmable logic controller) or a microprocessor. The second charge control module 137 is a single chip microcomputer, a system on a chip, a PLC (Programmable Logic Controller ) or a microprocessor.
In various embodiments of the charging device of the present application, the charging device comprises one charging peg 11 of a first type and at least two charging pegs 13 of a second type. There is a power connection and a communication connection between the first type of charging stake 11 and the second type of charging stake 13. The output power of the first ac-dc conversion module set 111 is smaller than the maximum support power of the liquid-cooled charging gun 113. The sum of the output powers of the first type 11 and the second type 13 of charging piles is greater than the maximum support power of the liquid-cooled charging gun 113. After the output power of two or more second-type charging piles 13 is switched to the first-type charging pile 11, the power which can be transmitted by the liquid-cooling charging gun 113 is larger than the sum of the power of the first-type alternating-current-direct-current conversion module group and any one of the switched second-type charging piles. In the practical application process, the second type of charging pile 13 is a charging pile which is already constructed, but cannot meet the requirement of super charging. The first type charging pile 11 is a charging pile additionally arranged and is used for providing super charging by using the liquid cooling charging gun 113, but the first type charging pile 11 alone cannot directly provide super charging, the output power of the liquid cooling charging gun 113 is smaller than the super charging requirement when the liquid cooling charging gun is singly used, and the output power of the second type charging pile 13 needs to be switched to the first type charging pile 11 when the super charging is required so as to improve the output power of the liquid cooling charging pile, thereby achieving the super charging requirement. By utilizing the structure of the charging device, the problem of high cost caused by directly constructing the super charging pile is avoided, meanwhile, the existing constructed charging station can be gradually transformed to improve the output power, resources are fully utilized, the resource waste is avoided, the gradual popularization of super charging is facilitated, and the resource waste caused by directly constructing the super charging station due to low current super charging requirement is avoided.
In one embodiment, as shown in fig. 7, a charging system is provided that includes N charging devices as described above. The charging device is sequentially in communication connection and power connection to form a chain-shaped charging structure. In the chain charging structure, at least one charging pile 13 of the second type is connected between adjacent charging piles 11 of the first type. The N charging devices are connected to form a large chain charging structure, so that a charging station capable of providing super charging is built.
In order to enable full use of the charging posts in a chain charging structure, in one example, as shown in fig. 8, a leading charging post is in power and communication connection with a trailing charging post; the head charging piles are the first type charging piles 11 or the second type charging piles 13; the tail charging piles are the first type charging piles 11 or the second type charging piles 13. The charging piles at the head and the tail in the chain charging structure are connected in a power and communication mode to form an annular charging structure, the charging piles at the tail can call the output power of the charging piles at the head, or the charging piles at the head can call the output power of the charging piles at the tail, so that the charging piles in the charging structure can be fully allocated, and the utilization rate of the output power is improved.
In one embodiment, the embodiment of the application provides a charging control method, which is applied to a charging device, wherein the charging device comprises a first type charging pile 11 and at least two second type charging piles 13; the first type charging pile 11 comprises a first type alternating-current-direct-current conversion module group 111 and a liquid cooling charging gun 113; the first type of alternating-direct conversion module group 111 is connected with the liquid cooling charging gun 113; the power transmission port of the first type charging pile 11 is connected with the power transmission port of the second type charging pile 13; and/or the second type charging pile 13 is connected through a power transmission port of the second type charging pile 13; the first type charging piles 11 and the second type charging piles 13 which are directly connected are in communication connection, and the second type charging piles 13 which are directly connected are in communication connection; the first type charging pile 11 is connected with a charging vehicle; the output power of the first ac-dc conversion module set 111 is smaller than the maximum supporting power of the liquid cooling charging gun 113; the sum of the output power of the first type charging pile 11 and the second type charging pile 13 is larger than the maximum supporting power of the liquid cooling charging gun 113; after the output power of two or more second-type charging piles 13 is switched to the first-type charging pile 11, the power which can be transmitted by the liquid-cooling charging gun 113 is larger than the sum of the power of the first-type alternating-current-direct-current conversion module group, the second-type alternating-current-direct-current conversion module group and any switched second-type charging pile. It should be noted that, in the charging control method of the present application, the charging device is the same as the charging device of the present application, and details of the charging device of the present application are not repeated herein.
As shown in fig. 9, the charge control method includes:
in step S910, when the charging demand power sent by the charging vehicle is received through the liquid cooling charging gun, it is determined whether the charging demand power is greater than the output power of the first type ac/dc conversion module. It should be noted that, in the charging process, the liquid cooling charging gun of the first type charging pile is inserted into the charging port of the charging vehicle, and the charging vehicle sends the charging demand power to the first type charging pile through the liquid cooling charging gun, for example, the charging demand power can be sent to the charging control module of the first type charging pile, and the charging control module compares the charging demand power with the output power of the first type ac/dc conversion module (where the output power of the first type ac/dc conversion module is the rated output power of the first type ac/dc conversion module, that is, the maximum output power that the first type ac/dc conversion module can output). In one example, the charging demand power is 300 kilowatts, 600 kilowatts, or 1000 kilowatts, or the like.
In step S920, if the charging power is greater than the output power of the first ac-dc conversion module, an idle second type charging pile is searched. The charging demand power is larger than the output power of the first type AC-DC conversion module, which indicates that the output power of the first type AC-DC conversion module cannot meet the charging demand power, the current charging demand power is the super charging demand, and the output power of the second type charging pile needs to be switched to the liquid cooling charging gun of the first type charging pile. In one mode, a second type of charging pile in an idle state is searched for, wherein the idle second type of charging pile is a charging pile in the second type of charging pile, and the charging pile is not connected with a charging vehicle.
Step S930, if there is an idle second-type charging pile, a control instruction is sent to the idle second-type charging pile which meets the charging demand power by the sum of the output power of the first-type charging pile, so as to instruct the idle second-type charging pile to switch the output power to the first-type charging pile. In an example in which the first type of charging pile comprises a first charging control module and the second type of charging pile comprises a second charging control module, the first charging control module sends a control instruction to the second charging control module, and the second charging control module switches the output power of the second type of charging pile to the first type of charging pile in response to the control instruction. In an example in which the first type charging pile comprises a first type direct current contactor group and the second type charging pile comprises a third type direct current contactor group, the first type charging pile controls the first type direct current contactor group between the first type alternating current-direct current conversion module and the power transmission port of the first type charging pile to be closed, and the second type charging pile closes the third type direct current contactor between the third type alternating current-direct current conversion module group and the power transmission port of the second type charging pile according to a control instruction, so that output power of the second type charging pile is switched to the first type charging pile.
Step S940, if there is no free second-class charging pile or the free second-class charging pile cannot meet the charging demand power, a control instruction is sent to the second-class charging pile in the charging state to instruct the second-class charging pile in the charging state to enter a waiting charging state, and output power is switched to the first-class charging pile. The second type of charging stake of charge state refers to a second type of charging stake of forward charging vehicle output charging power. In the first case, the second type of charging piles are connected with a charging vehicle and charge the charging vehicle. In the second case, part of the second-class charging piles are connected with the charging vehicle and charge the charging vehicle, and part of the second-class charging piles are in an idle state, and although the output power of the idle second-class charging piles is switched to the output power of the first-class charging piles, the charging demand power still cannot be met. Thus, the first type of charging peg sends control instructions to the second type of charging peg in the charged state, e.g. to the charging control module of the second type of charging peg in the charged state. And the second type of charging piles in the charging state respond to the control instruction, stop charging the charging vehicle and switch to the waiting charging state.
After the electric quantity of the charging vehicle connected with the liquid cooling charging gun is charged to a certain extent, the required charging power is gradually reduced, and the first type charging pile sends a notification to the switched second type charging pile to inform the second type charging pile to stop switching the output power to the first type charging pile under the condition that the required charging power is lower than the output power of the first type alternating-direct conversion module. In an example where the first type of charging stake includes a first charging control module and the second type of charging stake includes a second charging control module, the first charging control module sends a notification to the second charging control module, and the second charging control module stops switching output power to the first type of charging stake in response to the notification. In an example in which the first type charging pile comprises a first type direct current contactor group and the second type charging pile comprises a third type direct current contactor group, the first type charging pile controls the first type direct current contactor group between the first type alternating current-direct current conversion module and the power transmission port of the first type charging pile to be disconnected, and the second type charging pile closes the third type direct current contactor between the third type alternating current-direct current conversion module group and the power transmission port of the second type charging pile according to the control instruction, so that the second type charging pile stops switching output power to the first type charging pile. And (5) restoring the charging for the second type of charging piles waiting for the charging state.
In examples where the first type of charging stake includes a liquid cooled charging gun and a natural cooling charging gun, the liquid cooled charging gun is connected to the charging vehicle.
As shown in fig. 10, the charge control method includes:
in step S1010, when the charging power required by the charging vehicle is received through the liquid cooling charging gun, it is determined whether the charging power required is greater than the output power of the first type ac/dc conversion module.
In step S1020, if the charging power is greater than the output power of the first ac-dc conversion module, the natural cooling charging gun is controlled to enter a waiting state, and the output power of the corresponding second ac-dc conversion module is switched to the liquid cooling charging gun. In an example where the first-type charging stake further includes a second-type ac-dc conversion module group, the second-type ac-dc conversion module group is controlled to close with a second-type dc contactor group of the natural cooling charging gun therebetween.
And step S1030, if the sum of the output power of the liquid cooling charging gun and the natural cooling charging gun can not meet the charging demand power, searching for an idle second-type charging pile.
And step S1040, if the idle second-type charging pile exists, a control instruction is sent to the idle second-type charging pile which meets the charging demand power by the sum of the output power of the first-type charging pile, so as to instruct the idle second-type charging pile to switch the output power to the first-type charging pile.
Step S1050, if there is no free second-class charging pile or the free second-class charging pile cannot meet the charging demand power, a control instruction is sent to the second-class charging pile in the charging state to instruct the second-class charging pile in the charging state to enter a waiting charging state, and output power is switched to the first-class charging pile.
The charge control method of this example is substantially the same as that of the foregoing example, except that the first-type charging stake includes a natural cooling charging gun in this example, and the example switches the output power of the natural cooling charging gun of the first-type charging stake to the liquid cooling charging gun preferentially.
After the electric quantity of the charging vehicle connected with the liquid cooling charging gun is charged to a certain extent, the required charging power is gradually reduced, and under the condition that the charging power is lower than the output power of the first class AC-DC conversion module, the first class charging pile preferentially sends a notification to the switched second class charging pile to inform the second class charging pile to stop switching the output power to the first class charging pile. In an example where the first type of charging stake includes a first charging control module and the second type of charging stake includes a second charging control module, the first charging control module sends a notification to the second charging control module, and the second charging control module stops switching output power to the first type of charging stake in response to the notification. In an example in which the first type charging pile comprises a first type direct current contactor group and the second type charging pile comprises a third type direct current contactor group, the first type charging pile controls the first type direct current contactor group between the first type alternating current-direct current conversion module and the power transmission port of the first type charging pile to be disconnected, and the second type charging pile closes the third type direct current contactor between the third type alternating current-direct current conversion module group and the power transmission port of the second type charging pile according to the control instruction, so that the second type charging pile stops switching output power to the first type charging pile. And (5) restoring the charging for the second type of charging piles waiting for the charging state.
After all the switched second-class charging piles are stopped, the first-class charging piles control the second-class alternating-direct-current conversion module group to be disconnected with the second-class direct-current contactor group of the natural cooling charging gun, the switching of the output power of the natural cooling charging gun to the liquid cooling charging gun is stopped, and the natural cooling charging gun is restored to charge the charging vehicle.
Compared with a charging pile needing to be charged with new high-power super charging, the charging station of the built quick charging pile (the second type charging pile) can be additionally provided with the first type charging pile with the same power as the original quick charging pile or less than 1/2 of the maximum output power of super charging, so that the power of a charging module of the built charging pile is effectively utilized, and the charging of updating equipment is reduced under the condition of meeting the super charging requirement.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (6)
1. The charging device is characterized by comprising a first type charging pile and at least two second type charging piles; the first type charging pile comprises a first type alternating-direct conversion module group and a liquid cooling charging gun; the first alternating-current-direct-current conversion module group is connected with the liquid-cooling charging gun;
the power transmission port of the first type charging pile is connected with the power transmission port of the second type charging pile; the second type charging piles which are directly connected are connected through the power transmission ports of the second type charging piles;
the first type charging piles and the second type charging piles which are directly connected are in communication connection, and the second type charging piles which are directly connected are in communication connection;
the output power of the first type AC-DC conversion module group is smaller than the maximum support power of the liquid cooling charging gun; after the output power of two or more second-type charging piles is switched to the first-type charging piles, the power which can be transmitted by the liquid cooling charging gun is larger than the sum of the power of the first-type alternating-current-direct-current conversion module group and the power of any switched second-type charging pile; the liquid cooling charging gun is used for transmitting charging power of more than or equal to 300 kilowatts;
The first type charging pile further comprises a first alternating current input module, a liquid cooling module and a plurality of first type direct current contactor groups; the first alternating current input module is connected with the first alternating current-direct current conversion module group and is used for being connected with an alternating current power supply; the first type AC-DC conversion module group is connected with the liquid cooling charging gun through the first type DC contactor group; the liquid cooling charging gun is connected with the liquid cooling module; the first type direct current contactor group is connected between the first type alternating current-direct current conversion module and the power transmission port of the first type charging pile;
the liquid cooling module comprises an oil pump, an oil tank, a fan, a radiator and a liquid cooling controller; the liquid cooling charging gun comprises a liquid cooling pipeline; the oil pump is communicated with the liquid cooling pipeline; the liquid cooling pipeline is communicated with the radiator; the radiator is communicated with the oil tank, and the oil tank is connected with the oil pump; the liquid cooling controller is respectively connected with the fan and the oil pump; the fan is used for conveying or extracting air quantity to the radiator when being started;
the first-type charging pile further comprises a second-type alternating-current-direct-current conversion module group, a second-type direct-current contactor group and a natural cooling charging gun; the natural cooling charging gun is used for transmitting charging power below 250 kilowatts; the first alternating current input module is connected with the second alternating current-direct current conversion module group; the second type AC-DC conversion module group is connected with the natural cooling charging gun through the second type DC contactor group; the first type direct current contactor group is connected between the first type alternating current-direct current conversion module group and the second type alternating current-direct current conversion module group; after the output power of two or more second-type charging piles and the output power of the natural cooling charging gun are switched to the first-type charging piles, the power which can be transmitted by the liquid cooling charging gun is larger than the sum of the power of the first-type alternating-direct conversion module group, the power of the second-type alternating-direct conversion module group and the power of any one of the switched second-type charging piles;
The second type charging pile comprises a second alternating current input module, a third type alternating current-direct current conversion module group, the natural cooling charging gun and a plurality of third type direct current contactor groups; the second type of charging piles are not provided with liquid cooling charging guns; the second alternating current input module is connected with the third alternating current-direct current conversion module group and is used for being connected with an alternating current power supply; the third type of alternating-current-direct-current conversion module group is connected with the natural cooling charging gun through the third type of direct-current contactor group; the third type of DC contactor group is connected between the third type of AC-DC conversion module groups; and the third type direct current contactor is connected between the third type alternating current-direct current conversion module group and the power transmission port of the second type charging pile.
2. The charging device of claim 1, wherein the first type of charging peg comprises a first charging control module; the second type of charging piles comprise a second charging control module;
the first charging control module is connected with the liquid cooling charging gun, the liquid cooling module and the first direct current contactor group of the first type charging pile;
the second charging control module is connected with the third type direct current contactor group and the natural cooling charging gun;
The first charging control module is in communication connection with the second charging control module between the first type charging pile and the second type charging pile which are directly connected; and the second charging control modules are in communication connection with the second type of charging piles which are directly connected.
3. A charging system comprising N charging devices according to claim 1 or 2;
the charging device is sequentially connected with communication and power to form a chain charging structure; in the chain charging structure, at least one second-type charging pile is connected between adjacent first-type charging piles.
4. A charging system according to claim 3, wherein in the chain charging configuration, a leading charging peg is in power and communication connection with a trailing charging peg; the head charging pile is the first type charging pile or the second type charging pile; the tail charging piles are the first type charging piles or the second type charging piles.
5. A charging control method, characterized in that it is applied to a charging device according to claim 1 or 2, said charging device comprising one charging peg of a first type and at least two charging pegs of a second type; the first type charging pile comprises a first type alternating-direct conversion module group and a liquid cooling charging gun; the first alternating-current-direct-current conversion module group is connected with the liquid-cooling charging gun; the power transmission port of the first type charging pile is connected with the power transmission port of the second type charging pile; the second type charging piles are connected through power transmission ports of the second type charging piles; the first type charging piles and the second type charging piles which are directly connected are in communication connection, and the second type charging piles which are directly connected are in communication connection; the first type charging piles are connected with a charging vehicle; the output power of the first type AC-DC conversion module group is smaller than the maximum support power of the liquid cooling charging gun; after the output power of the second type charging pile is switched to the first type charging pile, the power which can be transmitted by the liquid cooling charging gun is larger than the sum of the power of the first type alternating-current-direct current conversion module group and the power of any switched second type charging pile;
The method comprises the following steps:
when receiving the charging demand power sent by the charging vehicle through a liquid cooling charging gun, judging whether the charging demand power is larger than the output power of a first type AC-DC conversion module;
if the charging demand power is larger than the output power of the first class AC-DC conversion module, searching the idle second class charging pile;
if the idle second-type charging pile exists, sending a control instruction to the idle second-type charging pile which meets the charging demand power by the sum of the output power of the first-type charging pile so as to instruct the idle second-type charging pile to switch the output power to the first-type charging pile;
if the idle second-class charging pile does not exist or the idle second-class charging pile cannot meet the charging demand power, a control instruction is sent to the second-class charging pile in a charging state to instruct the second-class charging pile in the charging state to enter a waiting charging state, and output power is switched to the first-class charging pile.
6. The charge control method of claim 5, wherein the first type of charging stake comprises a liquid cooled charging gun and a natural cooling charging gun; the liquid cooling charging gun is connected with the charging vehicle;
The method comprises the following steps:
when receiving the charging demand power sent by the charging vehicle through the liquid cooling charging gun, judging whether the charging demand power is larger than the output power of the first type AC-DC conversion module;
if the charging demand power is larger than the output power of the first type AC-DC conversion module, controlling the natural cooling charging gun to enter a waiting charging state, and switching the output power of the corresponding second type AC-DC conversion module to the liquid cooling charging gun;
if the sum of the output power of the liquid cooling charging gun and the natural cooling charging gun can not meet the charging demand power, searching for the idle second-type charging pile;
if the idle second-type charging pile exists, sending a control instruction to the idle second-type charging pile which meets the charging demand power by the sum of the output power of the first-type charging pile so as to instruct the idle second-type charging pile to switch the output power to the first-type charging pile;
if the idle second-class charging pile does not exist or the idle second-class charging pile cannot meet the charging demand power, a control instruction is sent to the second-class charging pile in a charging state to instruct the second-class charging pile in the charging state to enter a waiting charging state, and output power is switched to the first-class charging pile.
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