CN111835055A - Centralized charging cabinet - Google Patents

Centralized charging cabinet Download PDF

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Publication number
CN111835055A
CN111835055A CN201911244784.1A CN201911244784A CN111835055A CN 111835055 A CN111835055 A CN 111835055A CN 201911244784 A CN201911244784 A CN 201911244784A CN 111835055 A CN111835055 A CN 111835055A
Authority
CN
China
Prior art keywords
charging
area
unit
power distribution
row
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911244784.1A
Other languages
Chinese (zh)
Inventor
吴洪洋
祝建
孙丽萍
言超
李前丰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delta Electronics Shanghai Co Ltd
Original Assignee
Delta Electronics Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delta Electronics Shanghai Co Ltd filed Critical Delta Electronics Shanghai Co Ltd
Priority to US16/851,089 priority Critical patent/US11588337B2/en
Priority to ES20170235T priority patent/ES2934597T3/en
Priority to EP20170235.4A priority patent/EP3726695B1/en
Publication of CN111835055A publication Critical patent/CN111835055A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Abstract

The invention provides a centralized charging cabinet, comprising: the charging cabinet body is internally provided with an isolation region and a charging region; an isolation transformer disposed within the isolation region; at least one charging unit disposed in the charging region; each charging unit is electrically connected with the secondary winding of the isolation transformer through a plurality of first connecting structures; and the plurality of first connection structures are located in a back surface area of the charging area. In the centralized charging cabinet, the isolation transformer is arranged in the isolation area inside the charging cabinet body, the charging unit is arranged in the charging area inside the charging cabinet body, the centralized layout of the isolation transformer and the charging unit is realized, and the space utilization rate is improved. The charging unit is arranged in the charging cabinet body, the design requirement of the shell of the charging unit can be reduced, in addition, the charging area is divided into a back area and a front area, a power line connected with the isolation transformer and the charging unit is arranged in the back area which is not easy to contact, the isolation of a high-voltage area is realized, and the safety of the centralized charging cabinet is improved.

Description

Centralized charging cabinet
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a centralized charging cabinet.
Background
With the outstanding environmental problems, a policy for supporting the development of the electric vehicle is made in multiple countries around the world, and a matched electric vehicle charging system is continuously improved.
Fig. 1 is a schematic structural diagram of a charging system in the prior art. As shown in fig. 1, the charging system includes a distribution station, a switch box and a charging device, wherein, a 10kV high voltage is electrically connected to the 10kV switch box, the 10kV switch box is connected to the 10kV/0.4kV distribution station through a connection line, the distribution station includes a plurality of transformers, the charging device includes a plurality of rectifying units, the transformers are connected with the rectifying units in a one-to-one correspondence, the output of the rectifying units is used for charging the electric vehicle through a charging gun, and an automatic display screen and a control device are also configured in the charging system.
However, in the above charging system, the rectifying devices, the distribution station, and the control device are arranged in a distributed manner, and the space utilization rate is low.
Disclosure of Invention
The invention provides a centralized charging cabinet, which aims to solve the technical problem of low space utilization rate caused by distributed arrangement of rectifying equipment, a power distribution station and a control device in the conventional charging system.
The invention provides a centralized charging cabinet, comprising: the charging cabinet body is internally provided with an isolation region and a charging region; an isolation transformer disposed within the isolation region; at least one charging unit disposed in the charging region; each charging unit is electrically connected with the secondary winding of the isolation transformer through a plurality of first connecting structures; and the plurality of first connection structures are located in a back surface area of the charging area.
Optionally, the charging unit comprises: the charging control module is electrically connected with the M charging modules; the rear end of each charging module is provided with a first row of quick plug terminals; the rear end of the charging control module is provided with a second row of quick plug terminals and a third row of quick plug terminals; the first row of quick plug terminals are correspondingly connected with the second row of quick plug terminals one by one, and the corresponding quick plug terminals are connected through a connecting bus; the first row of quick plug terminals, the second row of quick plug terminals, the third row of quick plug terminals and the connecting bus bar are all positioned in the back area of the charging area; wherein M is a positive integer greater than or equal to 1.
Optionally, the third row of quick-connect terminals comprises: a plurality of input terminals and a plurality of output terminals; the plurality of input terminals are correspondingly connected with one ends of the plurality of first connecting structures one by one.
Optionally, a power distribution unit for electrically connecting with an external charging device is further arranged in the charging area; the charging unit is electrically connected with the power distribution unit through a plurality of second connecting structures; and a plurality of second connection structures are located at a back region of the charging region.
Optionally, a plurality of output terminals of the third row of fast plug terminals are correspondingly connected with one end of a plurality of second connection structures one by one, and the second connection structures are electrically connected with the power distribution unit through second connection lines so as to realize the electrical connection between the charging unit and the power distribution unit; and the second connecting wire is connected into the power distribution unit along the bottom of the charging cabinet body so as to realize the electrical connection with the second connecting structure.
Optionally, the primary winding of the isolation transformer is arranged in the front area of the isolation area and is connected with the power distribution network; the secondary winding of the isolation transformer is arranged in the back area of the isolation area.
Optionally, the secondary winding of the isolation transformer is electrically connected to the first connection structure through a first connection line, so that the charging unit is electrically connected to the secondary winding of the isolation transformer; the first connecting wire enters the charging area from the isolation area along the top of the charging cabinet body so as to be electrically connected with the first connecting structure.
Optionally, at least one energy storage unit is further arranged in the charging region; each energy storage unit is electrically connected with the secondary winding of the isolation transformer through a plurality of third connecting structures; each energy storage unit is also electrically connected with the power distribution unit through a plurality of fourth connecting structures, and the energy storage units are electrically connected with the external battery through the power distribution unit; the plurality of third connection structures and the plurality of fourth connection structures are respectively located in the back area of the charging area.
Optionally, the external battery is a battery with capacity exceeding a first threshold, the charging area is provided with an energy storage unit with capacity exceeding a second threshold, and the energy storage unit is correspondingly connected with the battery through the power distribution unit; or the external batteries are a plurality of batteries with the capacity smaller than a third threshold value, a plurality of energy storage units with the capacity smaller than a fourth threshold value are arranged in the charging area, and the plurality of energy storage units are electrically connected with the plurality of batteries in a one-to-one correspondence mode through the power distribution unit.
Optionally, the energy storage unit includes an energy storage control module and L energy storage modules; the energy storage control module is electrically connected with the L energy storage modules; the rear end of each energy storage module is provided with a fourth row of quick plug terminals; the rear end of the energy storage control module is provided with a fifth row of quick plug terminals and a sixth row of quick plug terminals; the fourth row of quick plug terminals are correspondingly connected with the fifth row of quick plug terminals one by one, and the corresponding quick plug terminals are connected through a connecting bus; the fourth row of quick plug terminals, the fifth row of quick plug terminals, the sixth row of quick plug terminals and the connecting bus are all positioned in the back area of the charging area; wherein L is a positive integer greater than or equal to 1.
Optionally, the sixth row of fast plug terminals includes a plurality of input terminals and a plurality of output terminals, the plurality of input terminals are connected to one end of the plurality of third connection structures in a one-to-one correspondence, and the plurality of output terminals are connected to one end of the plurality of fourth connection structures in a one-to-one correspondence; the secondary winding of the isolation transformer is electrically connected with the other end of the third connecting structure through a third connecting wire, and the third connecting wire enters the charging area from the isolation area along the top of the charging cabinet body; the fourth connecting structure is electrically connected with the power distribution unit through a fourth connecting wire, and the fourth connecting wire is connected into the power distribution unit along the bottom of the charging cabinet body.
Optionally, the charging cabinet body is provided with an auxiliary area, and the auxiliary area is provided with one or more of the following combinations: an auxiliary power supply and a monitoring unit; the monitoring unit comprises a monitor and a communication module; the auxiliary power supply is electrically connected with the secondary winding of the isolation transformer; or the auxiliary power supply is respectively and electrically connected with the secondary winding of the isolation transformer, the monitor and the communication module; the monitor is electrically connected with at least one charging unit and the communication module respectively; the communication module is electrically connected with an external central control management platform.
Optionally, the isolation transformer is connected with the power distribution network through a power distribution cabinet of the power grid; and the monitor is connected with the power distribution network and used for acquiring the opening and closing state of the isolation area door and sending a disconnection instruction to the power distribution network when the opening and closing state is determined to be an abnormal opening state so as to disconnect the electric connection between the power distribution network and the charging cabinet.
Optionally, a cooling fan and a control module are arranged in the charging control module, and the cooling fan is arranged on a front panel of the charging control module.
Optionally, the charging cabinet further comprises: a water cooling machine; a main water inlet pipe, a main water outlet pipe, at least one branch water inlet pipe and at least one branch water outlet pipe are arranged in the charging cabinet body, and each charging module is provided with two heat dissipation ports; the output end of the water cooling machine is connected with the main water inlet pipe, and the input end of the water cooling machine is connected with the main water outlet pipe; each branch water inlet pipe is connected with the main water inlet pipe, and each branch water outlet pipe is connected with the main water outlet pipe; two heat dissipation ports of each charging module are respectively connected with one branch water outlet pipe and one branch water inlet pipe.
The invention provides a centralized charging cabinet, in which an isolation transformer is arranged in an isolation area inside a charging cabinet body, a charging unit is arranged in a charging area inside the charging cabinet body, the centralized layout of the isolation transformer and the charging unit is realized, and the space utilization is improved. The charging unit is arranged in the charging cabinet body, the design requirement of the shell of the charging unit can be reduced, in addition, the charging area is divided into a back area and a front area, and a power line connected with the isolation transformer and the charging unit is arranged in the back area, so that high-voltage area isolation is realized, and the safety of the centralized charging cabinet is improved.
Drawings
Fig. 1 is a schematic structural diagram of a charging system in the prior art;
fig. 2 is a schematic front view of a centralized charging cabinet according to an exemplary embodiment of the present invention;
fig. 3 is a schematic diagram of a rear structure of the centralized charging cabinet according to the embodiment of the invention shown in fig. 2;
fig. 4 is a circuit schematic of a centralized charging cabinet according to another exemplary embodiment of the present invention;
fig. 5 is a diagram illustrating an output manner of the centralized charging cabinet according to the embodiment shown in fig. 4;
FIG. 6 is a schematic circuit diagram of a charging unit in the centralized charging cabinet according to the present invention;
fig. 7 is a schematic structural diagram of a charging unit in the centralized charging cabinet according to the present invention;
FIG. 8 is a schematic diagram of a quick-connect terminal of the charging unit shown in FIG. 7 according to the present invention;
fig. 9 is a schematic diagram illustrating the connection of the charging unit in the centralized charging cabinet according to the present invention;
fig. 10 is a schematic structural diagram of a charging control module in a centralized charging cabinet according to the present invention;
fig. 11 is a circuit schematic of a centralized charging cabinet according to yet another exemplary embodiment of the present invention;
fig. 12 is a schematic structural diagram of a centralized charging cabinet according to the embodiment shown in fig. 11;
fig. 13 is a schematic side view of a centralized charging cabinet according to yet another exemplary embodiment of the present invention;
fig. 14 is a schematic circuit diagram of the centralized charging cabinet shown in fig. 13 according to the embodiment of the present invention;
fig. 15 is a schematic circuit diagram of a centralized charging cabinet according to yet another exemplary embodiment of the present invention;
fig. 16 is a schematic circuit diagram of a centralized charging cabinet according to yet another exemplary embodiment of the present invention;
fig. 17 is a layout diagram of a charging station built by a centralized charging cabinet according to the present invention;
fig. 18 is a schematic structural view of a cabinet provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a centralized charging cabinet which can solve the technical problem of low space utilization rate caused by distributed arrangement of rectifying equipment, a power distribution station and a control device in the conventional charging system.
Fig. 2 is a schematic front structural diagram of a centralized charging cabinet according to an exemplary embodiment of the present invention. Fig. 3 is a schematic diagram of a rear structure of the centralized charging cabinet according to the embodiment of the invention shown in fig. 2. As shown in fig. 2 and 3, the centralized charging cabinet 100 provided in the present embodiment includes a charging cabinet body 110, an isolation transformer 120, and a charging unit 130. The number of the charging units 130 is one or more. The charging cabinet body can be a standard container or a specially-customized cabinet body. The charging cabinet 110 is divided into two regions: one region is an isolation region 111 and the other region is a charging region 112. An isolation transformer 120 is disposed within the isolation region 111. The isolation transformer 120 may be a phase-shifting transformer or a multi-winding transformer, or the isolation transformer may only include one set of secondary windings, and the structure of the isolation transformer is not limited. The charging unit 130 is disposed in the charging area 112, and when the number of the charging units is multiple, the charging units 130 are arranged in the charging area 112 in an array, for example, four rows in fig. 2, each row includes 6 charging units, it should be noted that the present invention is not limited thereto, and the number and the arrangement manner of the charging units can be flexibly set according to actual requirements.
In the above-described centralized charging cabinet, the charging region is divided into the front region 113 and the rear region 114, and each charging unit 130 is electrically connected to the secondary winding of the isolation transformer through a plurality of first connection structures. And a plurality of first connection structures are located in the backside region 114 of the charging region. The isolation region is also divided into a front region 115 and a back region 116.
In this embodiment, the primary winding of the isolation transformer 120 is connected to a power distribution network, a group of secondary windings of the isolation transformer 120 is connected to the ac side of one charging unit 130 through a plurality of first connection structures, and the dc side of the charging unit 130 is connected to an external charging device, so that one charging unit 130 charges one external charging device.
In the centralized cabinet that charges that this embodiment provided, arrange isolation transformer in the isolation region of the cabinet body that charges, the charging unit is arranged in the charging region of the cabinet body that charges to utilize a plurality of first connection structures to realize that charging unit and isolation transformer are connected, realize with charging unit and isolation transformer integration in a cabinet body, promote space utilization. Further, in concentrating the charging unit to the cabinet body that charges, the shell of charging unit can design according to indoor application, and every charging unit need not design according to outdoor application, has reduced the dustproof and waterproof standard to the charging unit casing, has not only reduced the degree of difficulty of mechanism's design, reduces shell material's grade moreover, saves the cost. In addition, the charging area is divided into a front area and a back area, the first connecting structure is located in the back area of the charging area, so that a power line connecting the secondary winding of the isolation transformer and the charging unit is located in the back area which is not easy to contact, high-voltage area isolation is achieved, and safety of the centralized charging cabinet is improved.
In the centralized charging cabinet 200 shown in accordance with another exemplary embodiment of the present invention, a power distribution unit 240 is further included in addition to the charging cabinet body, the isolation transformer 220, and the charging unit 230. The power distribution unit 240 is located in the charging region. Each of the charging units 230 is electrically connected to the power distribution unit 240 through a plurality of second connection structures, and the plurality of second connection structures are located at a rear region of the charging region, and the power distribution unit 240 is further configured to be electrically connected to an external charging device.
Fig. 4 is a circuit schematic of a centralized charging cabinet according to another exemplary embodiment of the present invention. As shown in fig. 4, in this embodiment, the primary winding of the isolation transformer 220 is connected to an external power distribution cabinet, a group of secondary windings of the isolation transformer 220 is connected to an ac side of one charging unit 230 through a plurality of first connection structures, a dc side of each charging unit 230 is connected to a power distribution unit through a plurality of second connection structures, and an external charging device is connected to the power distribution unit, so that one charging unit 230 charges an external charging device. For example, the output of the power distribution unit is connected to a charging gun, the charging gun is used for charging the charging equipment, and the communication interface of the charging unit is directly connected with the communication interface of the charging gun. The second connecting structure is located in the back area of the charging area, so that a power line connecting the charging unit and the power distribution unit is located in the back area, high-voltage area isolation is achieved, and safety performance of the centralized charging cabinet is improved.
The multi-path output of the power distribution unit can be flexibly configured and combined, and one path of output can be connected with one charging device; two paths of outputs can be combined together to supply power for one charging device, namely two charging units supply power for one charging device; three paths of outputs can be combined together, and the analogy is repeated, so that any combination mode can be met.
When the centralized charging cabinet works, the output power of the power distribution network is output to a charging gun or a distributor of a user through the isolation transformer, the charging unit and the power distribution unit so as to realize charging of the charging equipment.
Fig. 5 is a diagram illustrating an output manner of the centralized charging cabinet according to the embodiment shown in fig. 4. As shown in fig. 5, the output of the centralized charging cabinet 200 may be connected to a charging gun or a distributor (dispenser), and the charging output mode is various. The Charging protocols used at present mainly include three types, namely, the Chademo protocol in japan, the Combined Charging System in europe and the united states, referred to as CCS) standard, and the national standard GB in china. The output communication line of the centralized charging cabinet can be connected with a charging gun or a distributor using any one of the charging protocols, and the universality is very strong.
Fig. 6 is a schematic circuit diagram of a charging unit in the centralized charging cabinet according to the present invention. As shown in fig. 6, the charging unit 230 includes a charging control module and M charging modules, where M is a positive integer greater than or equal to 1. M charge the module parallel connection, and M charge the module and be connected with the control module that charges, there are power connection and communication connection between control module and the M module that charges. The charging control module is internally provided with a switch, the M charging modules are controlled to be connected into or disconnected from the secondary winding of the isolation transformer through the switch, and the output of the M charging modules is controlled to be connected into or disconnected from the power distribution unit through the switch. Wherein, the charging control module gives the charging instruction to M charging modules through the communication line. The input of the charging control module is connected to the secondary winding of the isolation transformer, and the output of the charging control module is connected to the power distribution unit.
Fig. 7 is a schematic structural diagram of a charging unit in the centralized charging cabinet according to the present invention. As shown in fig. 7, the charging unit 230 includes one charging control module 232 and M charging modules 231. Where M is a positive integer greater than or equal to 1, only the case where M is 1 is given in fig. 7, and when M is a positive integer greater than 1, the structure of each charging module 231 is the same. The rear end of each charging module 231 is provided with a first row of quick plug terminals 233, and the rear end of each charging control module 232 is provided with a second row of quick plug terminals 234 and a third row of quick plug terminals 235.
Fig. 8 is a schematic structural diagram of a quick-connect terminal of the charging unit in fig. 7 according to the present invention. As shown in fig. 8, the number of the fast plug terminals 236 in each row of fast plug terminals is 11, wherein the 1 st to 4 th fast plug terminals are dc fast plug terminals, which are dc output terminals of the charging control module or the charging module, the 5 th fast plug terminal is a ground terminal, the fast plug terminal is used for grounding, and the 6 th to 11 th fast plug terminals are ac fast plug terminals, which are ac input terminals of the charging control module or the charging module. When it needs to be explained, the number of each row of the quick-plug terminals in the charging unit is not limited to this, and can be flexibly set according to actual requirements.
In the centralized charging cabinet, the first row of fast plug terminals 233 and the second row of fast plug terminals 234 are connected in a one-to-one correspondence manner, and the corresponding fast plug terminals are connected through a connection busbar; and the first row of quick plug terminals, the second row of quick plug terminals, the third row of quick plug terminals and the connecting bus bar are all positioned in the back area of the charging area.
Fig. 9 is a schematic diagram of the connection of the charging unit in the centralized charging cabinet according to the present invention. As shown in fig. 9, the quick-plug terminals are electrically connected through a connection busbar 252, and the quick-plug terminals are electrically connected with the secondary winding of the transformer and the power distribution unit through a connection busbar 251. The first connection structure and the second connection structure are the wiring busbar 251, the first connection structure is used for realizing the connection between the secondary winding of the isolation transformer and the charging unit, and the second connection structure is used for realizing the connection between the charging unit and the power distribution unit.
Referring to fig. 7-9, the fast plug terminals 2331 of the charging module and the fast plug terminals 2341 of the charging control module are electrically connected by a connecting bus bar 252, and the number of the connecting bus bars corresponds to the number of the fast plug terminals in each row, so that the first row of fast plug terminals and the second row of fast plug terminals are correspondingly connected one by one. The quick-plug terminals 2341 in the charging control module belong to the second row of quick-plug terminals. For example, if the number of each row of quick-plug terminals is 11, 11 connection busbars are correspondingly arranged. As shown in fig. 9, each connecting bus bar is provided with a plurality of protrusions 253, the number of the protrusions is the same as the total number of the charging control modules and the charging modules, for example, if the charging unit includes 1 charging module, each connecting bus bar 252 is provided with 2 protrusions 253, and if the charging unit includes 2 charging modules, each connecting bus bar 252 is provided with 3 protrusions 253. The charging unit comprises a charging control module and 1 charging module, the connecting busbar is provided with 2 protrusions, one protrusion of the connecting busbar is inserted into one fast-plug terminal 2331 of the charging module, and the other protrusion of the connecting busbar is inserted into one fast-plug terminal 2341 of the charging control module. The fast plug terminal 2341 belongs to the second row of fast plug terminals, and the two fast plug terminals 2331 and 2341 are located correspondingly, i.e. in the same column, with reference to fig. 9, so as to electrically connect the charging control module and the corresponding power terminal in the charging module, for example, the charging module and the ac input terminal corresponding to the charging control module are electrically connected, or the charging module and the dc output terminal corresponding to the charging control module are electrically connected, or the charging module and the ground terminal corresponding to the charging control module are electrically connected. If the charging unit comprises 3 charging modules, the number of the bulges in the connecting bus bar 252 is 4, the lowest bulge is connected with the quick-plug terminal of the charging control module, and the remaining 3 bulges are respectively connected with the quick-plug terminals of the 3 charging modules correspondingly to realize the parallel connection of the 3 charging modules and the connection of the charging modules and the charging control module.
The charging control module 232 and the charging module 231 are connected through the connecting busbar 252, so that the use of wires is reduced, the space is saved, the installation difficulty is reduced, a user can stand in the front area of the charging area to directly insert the charging control module and the charging module into the connecting busbar or pull the charging control module and the charging module out of the connecting busbar, and the charging control module or the charging module can be easily installed and maintained.
Referring to fig. 7-9, the fast plug terminals 2351 of the charging control module are electrically connected to one end 2511 of the wiring busbar 251, and the number of the wiring busbars corresponds to the number of the fast plug terminals in each row, so as to implement one-to-one corresponding connection of the wiring busbars of the third row of fast plug terminals. The quick-plug terminal 2351 belongs to the third row of quick-plug terminals. For example, if the number of the third row of quick plug terminals is 11, 11 wiring busbars are correspondingly arranged. In the third row of quick plug terminals, the quick plug terminal connected with the alternating current input end of the charging control module is an alternating current quick plug terminal, the quick plug terminal connected with the grounding end of the charging control module is a grounding terminal, the quick plug terminal connected with the direct current output end of the charging control module is a direct current quick plug terminal, the wiring busbar connected with the alternating current quick plug terminal is of a first connection structure, and the wiring busbar connected with the direct current quick plug terminal is of a second connection structure. For example, in fig. 7, the number of each row of quick-plug terminals is 11, the number of the wiring busbars is 11, from left to right, the 1 st to 4 th wiring busbars are all the second connection structures, and the 6 th to 11 th wiring busbars are all the first connection structures.
As shown in fig. 9, one end of the wiring busbar is provided with a protrusion 2511, the other end of the wiring busbar is provided with a threaded hole 2512, and the protrusion 2511 is inserted into a fast plug terminal 2351 of the charging control module, which belongs to a third row of fast plug terminals. The threaded hole 2512 is used to mount a cable tapped from the secondary winding of the isolation transformer or a cable connected to the power distribution unit.
The threaded holes of the second connecting structures are connected to cables of the power distribution unit, the bulges of the second connecting structures are inserted into the direct-current quick-plug terminals of the charging control module in a one-to-one correspondence mode, the direct-current quick-plug terminals belong to the third row quick-plug terminals, one end of each of the direct-current output ends of the charging control module is connected with one end of each of the second connecting structures in a one-to-one correspondence mode, the second connecting structures are electrically connected with the power distribution unit through second connecting lines, and the charging unit is electrically connected with the power distribution unit.
The threaded holes of the first connecting structures are connected with cables connected with secondary windings of the isolation transformer in a tapping mode, the bulges of the first connecting structures are inserted into the alternating current quick-plug terminals of the charging control module in a one-to-one correspondence mode, the alternating current quick-plug terminals belong to third-row quick-plug terminals, a plurality of alternating current input ends of the charging control module are connected with one ends of the first connecting structures in a one-to-one correspondence mode, the first connecting structures are electrically connected with the isolation transformer through first connecting lines, and the charging unit is electrically connected with the secondary windings of the isolation transformer. And the wiring busbar connected with the grounding terminal in the third row of quick plug terminals is connected to the chassis or the ground.
In another embodiment of the present invention, a circuit breaker may be connected in series in the first connection line, and the first connection structure is electrically connected to the isolation transformer through the circuit breaker and the cable. Set up the circuit breaker between first connection structure and isolation transformer, set up the circuit breaker promptly between charging unit and isolation transformer, can realize following function: when the charging unit has a fault and needs maintenance, the breaker corresponding to the fault charging unit is disconnected, so that the uncharged operation is ensured, and the safety guarantee is increased; when the load is abnormal, overcurrent occurs, and the circuit breaker is disconnected for overcurrent protection; when a short circuit occurs inside the charging unit, the breaker is disconnected for short-circuit protection.
Two rows of quick-plug terminals in the charging control module are respectively connected with the connecting busbar and the wiring busbar, so that the use of wires is reduced, the space is saved, the installation difficulty is reduced, a user can stand in the front area of the charging area to directly plug the charging control module into the connecting busbar and the wiring busbar or extract the charging control module from the connecting busbar and the wiring busbar, and the charging control module can be easily installed and maintained.
Fig. 10 is a schematic structural diagram of a charging control module in a centralized charging cabinet according to the present invention. As shown in fig. 10, a cooling fan 238 and a control module 237 are provided in the charging control module. The control module 237 is a plug-in type, and is fixed to the panel by screws, and the control module can be taken out by screwing off the screws for locking the control module 237 to the front panel. Because the heat dissipation fan 238 is fixed to the front panel by screws due to the influence of dust, application environment, service life, etc., when the heat dissipation fan is damaged, the heat dissipation fan can be taken out by screwing off the screws locking the heat dissipation fan 238 to the front panel, which is convenient for replacement.
In the centralized charging cabinet, the primary winding of the isolation transformer is disposed in the front area of the isolation region. The secondary winding of the isolation transformer is arranged in the back area of the isolation area. And a first connecting wire connected with the secondary winding of the isolation transformer enters the charging area from the isolation area along the top of the charging cabinet body so as to realize that the first connecting wire is electrically connected with the first connecting structure. The second connecting wire connected with the charging unit is connected into the power distribution unit along the bottom of the charging cabinet body so as to realize the connection of the second connecting wire and the power distribution unit. The connecting structure for transmitting high-voltage heavy current is located in the back area of the charging area, so that strong current isolation is realized, and the safety of the centralized charging cabinet is improved. The input and the output of the charging area are positioned in the back area of the charging area, the input is from the top of the charging cabinet body, the output is from the bottom of the charging cabinet body, the input and the output are from the top, the wiring is carried out at the same side, the space is saved, the distribution lines are reduced,
in the centralized cabinet that charges that this embodiment provided, set up M and charge the structure of control module 1, can increase every charging unit's charging power, charge control module and the module of charging are connected through connecting female arranging, charge control module still with the female row of being connected of wiring, the use of wire rod has been reduced, the space has been saved, the installation degree of difficulty has been reduced, the user can be at the front region in the district that charges with charge control module and the module of charging direct plug-in female arranging or extract from female arranging, in order to realize that the installation maintains charge control module or the module of charging, the installation is maintained simply and the security performance is high. In addition, the input and output of the charging area are both located in the back area of the charging area, and the back area of the charging area is a higher voltage area and needs to enter when special maintenance is carried out, so that power-off operation is needed. The front area of the charging area only has a communication interface, and the voltage is a safe voltage below 24V, so that the strong and weak current separation is realized, and the general maintenance operation can be performed on the charging unit under the condition of no power failure.
Fig. 11 is a circuit schematic of a centralized charging cabinet according to yet another exemplary embodiment of the present invention. As shown in fig. 11, the centralized charging cabinet 300 provided in this embodiment further includes an energy storage unit 350 in addition to the charging cabinet body, the isolation transformer 320, the charging unit 330, and the power distribution unit 340. The energy storage unit 350 is 1 or more in number and is disposed in the charging region. Each energy storage unit is electrically connected with the secondary winding of the isolation transformer through a plurality of third connecting structures; each energy storage unit is also electrically connected with the power distribution unit through a plurality of fourth connection structures, and the energy storage units are electrically connected with the external battery through the power distribution unit. The plurality of third connection structures and the plurality of fourth connection structures are respectively located in the back area of the charging area.
Fig. 12 is a schematic structural diagram of a centralized charging cabinet according to the embodiment shown in fig. 11. As shown in fig. 12, in this embodiment, the primary winding of the isolation transformer 320 is connected to the power distribution network, a group of secondary windings of the isolation transformer 320 is connected to the ac side of one charging unit 330 through a plurality of first connection structures, the dc side of each charging unit 330 is connected to the power distribution unit through a plurality of second connection structures, and the external charging device is connected to the power distribution unit, so that one charging unit 330 charges one external charging device. A group of secondary windings of the isolation transformer 320 are connected with the alternating current side of one energy storage unit 350 through a plurality of third connection structures, the direct current side of each energy storage unit 350 is connected with a power distribution unit through a plurality of fourth connection structures, and an external battery is connected with the power distribution unit so as to realize that the external battery is expanded for a power distribution network through the energy storage unit.
The energy storage unit is similar with the unit construction that charges, and the energy storage unit contains an energy storage control module and L energy storage module, and the quantity of energy storage module is 1 or a plurality ofly, and energy storage control module and L energy storage module are all connected electrically. L is a positive integer of 1 or more. The ac side of the energy storage control module is connected to the isolation transformer 320, and the dc side of the energy storage control module is connected to the external battery through the power distribution unit.
With continued reference to fig. 12, in the centralized charging cabinet 300, when the capacity of the external battery exceeds a preset first threshold, an energy storage unit with a capacity exceeding a preset second threshold is disposed in the charging area, the centralized charging cabinet 300 only includes one energy storage unit 350, and the energy storage unit 350 is correspondingly connected to the battery through a power distribution unit. The energy storage unit can select the structure that an energy storage control module adds a plurality of energy storage modules, and a single energy storage unit can export bigger power like this, satisfies single battery charge-discharge power demand of large capacity.
When the capacity of the external battery is less than the preset third threshold, a plurality of energy storage units with the capacity less than the preset fourth threshold are disposed in the charging area, the centralized charging cabinet 300 includes a plurality of energy storage units 350, and the plurality of energy storage units are electrically connected with the plurality of batteries in a one-to-one correspondence manner through the power distribution unit. The charging and discharging power of a single small-capacity battery is low, the energy storage unit can select a structure of adding one energy storage control module and one energy storage module, and the charging and discharging power of the energy storage unit is low and matched with the charging and discharging power of the single small-capacity battery. The first threshold is far larger than the third threshold, and the second threshold is far larger than the fourth threshold, that is, the battery with the capacity exceeding the first threshold is a large-capacity battery, but the price is high, and the battery with the capacity smaller than the third threshold is a small-capacity battery, and the price is low.
Compared with the embodiment shown in fig. 1, in fig. 12, L charging units in the charging cabinet are replaced by L energy storage units, the L energy storage units are connected with L batteries in a one-to-one correspondence manner, and one energy storage unit controls the charging and discharging of one small-capacity battery, so that a centralized charging and storing integrated system is formed. In application, due to safety considerations, a plurality of batteries need to be electrically isolated from each other, L energy storage units in the charging cabinet are connected to L sets of secondary windings of the isolation transformer, and are electrically isolated from each other, so that after the L energy storage units are connected with the L batteries, the L batteries are also electrically isolated from each other.
The connection mode of the energy storage unit, the power distribution unit and the isolation transformer is the same as that of the charging unit, the power distribution unit and the isolation transformer. The rear end of each energy storage module is provided with a fourth row of quick plug terminals, and the rear end of each energy storage control module is provided with a fifth row of quick plug terminals and a sixth row of quick plug terminals; the fourth row of quick plug terminals are connected with the fifth row of quick plug terminals in a one-to-one correspondence mode, the corresponding quick plug terminals are connected with each other through a connecting bus bar, so that the energy storage control module is electrically connected with the L energy storage modules, the L energy storage modules are electrically connected in parallel, and the energy storage units are conveniently installed and maintained. And the fourth row of quick plug terminals, the fifth row of quick plug terminals, the sixth row of quick plug terminals and the connecting bus bar are all located in the back area of the charging area, and the structure for transmitting high-voltage large current is located in the back area which is not easy to contact, so that the safety isolation of the high-voltage area is realized, and the safety performance of the centralized charging cabinet is improved.
The terminal is inserted soon to the sixth row includes a plurality of input terminal and a plurality of output terminal, and a plurality of input terminal are connected with a plurality of third connection structure's one end one-to-one, and isolation transformer secondary winding passes through the third connecting wire and is connected with third connection structure's the other end electricity, and the third connecting wire gets into the district that charges from the isolation region along the top of the cabinet body that charges. A plurality of output terminals are connected with one end one-to-one correspondence of a plurality of fourth connection structures, the fourth connection structures are electrically connected with the power distribution unit through fourth connecting wires, and the fourth connecting wires are connected into the power distribution unit along the bottom of the charging cabinet body.
In the centralized charging cabinet provided in this embodiment, the connection manner between the energy storage unit and the isolation transformer and between the energy storage unit and the power distribution unit is the same as that between the isolation transformer and the power distribution unit of the charging unit mentioned above, and replacement of the energy storage unit with the charging unit can be quickly achieved. The connection relationship between the energy storage control module and the energy storage module in the energy storage unit is also the same as the connection relationship between the charging control module and the charging module, and is not described herein again. Some charging units change into the energy storage unit in the cabinet body that charges, are equipped with external battery simultaneously, and centralized cabinet that charges can realize filling and storing up integrative system, realizes under the not enough condition of distribution network capacity, provides the electric energy by external battery.
Fig. 13 is a schematic side view of a centralized charging cabinet according to another exemplary embodiment of the invention. As shown in fig. 13, in the centralized charging cabinet 400 provided in this embodiment, in addition to the charging cabinet body 410, the isolation transformer 420, the charging unit 430, and the power distribution unit 440, an auxiliary power supply 450, a monitoring unit 460, and a heat dissipation system 470 are further included. An auxiliary area 411 is provided in the charging area, and the auxiliary power supply 450 and the monitoring unit 460 are located in the auxiliary area 411. The monitoring unit comprises a monitor and a communication module. According to the requirement, if a plurality of vehicles need to be charged simultaneously, a large centralized charging cabinet comprising a communication module, an auxiliary power supply and a monitor can be selected and equipped.
Fig. 14 is a schematic circuit diagram of the centralized charging cabinet according to the embodiment of the invention shown in fig. 13. As shown in fig. 14, the primary winding of the isolation transformer 420 is connected to a power distribution cabinet of a power grid outside the charging cabinet, the secondary winding of the transformer is connected to N charging units, N is a positive integer greater than or equal to 1, the power outputs of the N charging units are connected to a power distribution unit, the output of the power distribution unit is connected to a charging gun or a distributor, and the communication interface of the charging unit is directly connected to the communication interface of the charging gun or the distributor. The auxiliary power supply 450 is electrically connected to the secondary winding of the isolation transformer 420, the monitor, and the communication module, respectively. The communication module is communicated with an external central control management platform. The monitor communicates with the charging unit 430 and the communication module, respectively.
When the large-scale centralized charging cabinet works, the monitor communicates with each charging unit to acquire charging voltage, current and running state information of each charging unit, the monitor simultaneously monitors the temperature and humidity inside the whole charging cabinet body and the temperature of the isolation transformer, and outputs the information to the central control management platform through the communication module, the central control management platform can issue a maximum charging power instruction to the monitor through the communication module, the monitor sends the instruction to the charging unit again, and the maximum power which can be output by the charging unit is limited. The monitor is communicated with the power distribution cabinet, and when serious faults occur, such as overhigh temperature in the charging cabinet body or overhigh temperature of the isolation transformer, the monitor informs the power distribution cabinet to disconnect the power grid.
Fig. 15 is a schematic circuit diagram of a centralized charging cabinet according to still another exemplary embodiment of the present invention. Compared with fig. 14, in the present embodiment, a plurality of charging units are replaced with a plurality of energy storage units, so as to form a centralized intelligent charging cabinet. For details, please refer to fig. 14, which is not repeated herein.
Fig. 16 is a schematic circuit diagram of a centralized charging cabinet according to still another exemplary embodiment of the present invention. If only one vehicle needs to be charged, the centralized charging cabinet does not comprise a communication module, an auxiliary power supply and a monitor, and is a small centralized charging system. The primary winding of the isolation transformer is connected with a power distribution cabinet of a power grid outside the charging cabinet, the secondary winding of the isolation transformer is connected to the charging unit, the output of the charging unit is connected to the power distribution unit, and the power output of the charging unit is connected to a charging gun or a distributor of a user by the power distribution unit. The charging cabinet only comprises one charging unit, the charging unit monitors the temperature and humidity inside the whole charging cabinet and the temperature of the isolation transformer, the charging unit is communicated with the power grid power distribution cabinet through a communication line located in the front area of a charging area, and when serious faults such as overhigh temperature inside the charging cabinet or overhigh temperature of the isolation transformer occur, the charging unit informs the power grid power distribution cabinet to disconnect the power grid. The charging unit comprises a charging control module and a plurality of charging modules which are connected in parallel, and the charging power of the single trolley can be increased by connecting the plurality of charging modules in parallel.
In this embodiment, the isolation transformer may be a phase-shifting transformer or a multi-winding transformer. The primary winding of the isolation transformer is connected with a power distribution network, and the power distribution network can be a low-voltage 380V power network or a medium-voltage power network. When the isolation transformer is a phase-shifting transformer, the phase-shifting transformer is provided with 2N +1 groups of secondary windings, wherein one group of secondary windings supplies power to an auxiliary power supply and a heat dissipation System, the auxiliary power supply is used for supplying power to the monitor and the communication module, the auxiliary power supply is simultaneously connected with an Uninterruptible Power Supply (UPS), and when the isolation transformer or the power distribution network has a fault, the UPS supplies power to the monitor and the communication module. The remaining 2N sets of secondary windings are connected into N charging units of the charging area, and each two sets of secondary windings are connected into one charging unit. If the isolation transformer is a multi-winding transformer, the isolation transformer is provided with N +1 groups of secondary windings, wherein one group of secondary windings also supplies power for the auxiliary power supply and the heat dissipation system. The auxiliary power supply is used for supplying power to the monitor and the communication module, the auxiliary power supply is connected with the UPS at the same time, when the isolation transformer or the power grid fails, the monitor and the communication module are supplied with power, the remaining N groups of secondary side windings are connected into N charging units in the charging area, and each group of secondary side windings are connected into one charging unit.
Because the secondary windings of the isolation transformer are electrically isolated from each other, different charging units are connected to different secondary windings, the electrical isolation of the N charging units is also realized, the charging units can not be electrically isolated any more, and the centralized isolation is realized.
In this embodiment, the door of the isolation region of the charging cabinet body and the power distribution cabinet have an interlocking mechanism, and only when the switch of the power distribution cabinet is disconnected, the door of the isolation region can be opened to ensure the safety of the operator. Referring to fig. 15, when the isolation transformer is connected to the medium voltage power grid, the monitor communicates with the power distribution cabinet, the monitor monitors the state of the door of the isolation region in real time, and when the door of the isolation region is abnormally opened, the monitor informs the power distribution cabinet to disconnect the power grid through communication with the power distribution cabinet. Referring to fig. 16, when the isolation transformer is connected to the medium voltage power grid, the charging unit communicates with the power distribution cabinet, the charging unit monitors the state of the isolation region gate in real time, and when the isolation region gate is opened abnormally, the charging unit notifies the power distribution cabinet to disconnect the power grid through communication with the power distribution cabinet.
In this embodiment, the heat dissipation system includes water-cooling machine, total inlet tube, total outlet pipe, branch inlet tube and branch outlet pipe, and the quantity of branch inlet tube and branch outlet pipe all can be 1, or be a plurality of. Wherein, total inlet tube, total outlet pipe, branch's inlet tube and branch's outlet pipe all set up at the cabinet that charges internally, total outlet pipe and total inlet tube are located the cabinet bottom that charges, total outlet pipe and total inlet tube get into the district that charges after, from up drawing forth several groups branch water pipe and branch's inlet tube down, branch's outlet pipe and branch's inlet tube are in with each horizontal position of the module that charges, respectively pull out a thin water pipe, two thin water pipe end-to-end have connect the water swivel public head, be equipped with two heat dissipation ports on every module that charges, be equipped with the female head of water swivel on the heat dissipation port, the public head of water swivel of two thin water pipes is connected with the female head of water swivel of the module that charges.
When the heat dissipation system works, the isolation transformer provides power for the water cooling machine, the water cooling machine enables cooling liquid to flow into the charging unit from the water inlet pipe and flow out of the charging unit to the water outlet pipe, and heat of the N charging units is concentrated on the water cooling machine through flowing of the cooling liquid.
Fig. 17 is a layout diagram of a charging station built by a centralized charging cabinet provided in the present invention. As shown in fig. 17, the cabinet that charges is arranged on the side in the charging station place, and the other places of charging station all can be planned to the parking stall, and the parking stall supplies electric automobile to charge, because adopt centralized cabinet that charges in the embodiment, more parking stalls can be held to the same land area.
A centralized charging cabinet provided by another exemplary embodiment of the present invention includes: the intelligent charging system comprises a charging cabinet body, an isolation transformer, a charging unit, a power distribution unit, an auxiliary power supply, a monitoring unit and a heat dissipation system. Wherein, the monitoring unit includes again: monitor and communication module. The heat dissipation system further includes: water-cooling pipe, water-cooling machine and cooling fan. Fig. 18 is a schematic structural view of a cabinet provided by the present invention. As shown in fig. 18, the cabinet 510 is provided with an isolation region 511 and a charging region 512, and the charging region 512 contains a power module bin 513, a power distribution bin 514 and a control bin 515. The isolation transformer is located in the isolation region 511, the charging unit is located in the power module bin 513, the power distribution unit is placed in the power distribution bin 514, and the auxiliary power supply, the monitor and the communication module are placed in the control bin 515. The water cooling machine is arranged at the edge of the cabinet body, and is convenient to carry out convection heat dissipation with air. The isolation region 511 and the power module bin 514 are respectively provided with a cooling fan.
In this embodiment, a specific process of installing the centralized charging cabinet may be as follows: according to the preset installation sequence, all the parts in the cabinet body are placed in sequence and then connected, so that the cabinet is convenient to assemble. For example, the first step installation sequence is: the isolation transformer and the charging unit are arranged in the isolation area 511, the charging unit is arranged in the power module bin 513, and the isolation transformer and the charging unit are connected through a wiring busbar. The second step of installation order is: a power distribution unit. The power distribution unit is placed in the power distribution compartment 514 and the power distribution unit and the charging unit are connected through the wiring busbar. The third step is that the installation sequence is as follows: auxiliary power supply, watch-dog and communication module. The auxiliary power supply, monitor and communication module are placed in the control pod 515 and the control lines are connected. Fourthly, a water cooling pipe is laid in the cabinet body and connected with a water cooling machine.
At the beginning of design, the centralized charging cabinet reasonably designs the cabinet body by considering the three aspects of heat dissipation after concentration, safety regulation and assembly convenience, divides the cabinet body into a plurality of areas, puts an isolation transformer into an isolation area, and puts a charging unit and other components into each cabin in the charging area. Through the division of a plurality of storehouse bodies for the heat dissipation of the internal part of cabinet is relatively independent, and the heat can not superpose between each other, does not have local overheated problem, solves the heat dissipation problem after concentrating well. In addition, if the isolation transformer is a medium voltage transformer, the whole cabinet body has two voltage levels of medium voltage and low voltage. The isolation of medium and low voltages relies on an isolation transformer on the one hand; on the other hand, the middle pressure and the low pressure are limited in different areas by the area division of the cabinet body and the cabin body division. When the installation maintenance personnel carry out maintenance operation, independent maintenance operation is carried out in different areas, and the safety performance is improved.
In the centralized cabinet that charges that this embodiment provided, when needs charge for many cars simultaneously, still include monitoring unit, auxiliary power source and cooling system in the centralized cabinet that charges, monitoring unit monitors the state of the cabinet body that charges, isolation transformer and the unit that charges, realizes the protection to the cabinet that charges, utilizes cooling system to concentrate and dispel the heat to the unit that charges, and the radiating efficiency is high.
In the centralized charging cabinet provided by the invention, the isolation region and the charging region are arranged in the charging cabinet body, the isolation transformer is arranged in the isolation region, and the charging unit is arranged in the charging region, so that the centralized layout of the isolation transformer and the charging unit is realized, the space utilization rate and the power density of the charging cabinet are improved, and the design requirement of the shell of the charging unit is reduced. The charging area is divided into a back area and a front area, and a power line connecting the isolation transformer and the charging unit is arranged in the back area, so that high-voltage area isolation is realized, and the safety of the centralized charging cabinet is improved.
In the centralized charging cabinet provided by the invention, the quick plug terminals are arranged at the rear ends of the charging control module and each charging module, the corresponding quick plug terminals are connected by using the connecting bus bar, the connection between the charging control module and each charging module is realized in the charging area, the space utilization rate is improved, the quick plug terminals of the charging control module and each charging module are arranged at the rear ends, and the quick plug terminals and the connecting bus bar are positioned in the back area of the charging area, so that the isolation of a high voltage area is realized, and the safety of the centralized charging cabinet is improved.
The centralized charging cabinet is also provided with an energy storage unit, the energy storage unit is connected with an external power supply, when the power of the power distribution network is insufficient, the energy storage unit and the external power supply can provide charging power for charging equipment, and when the power of the power distribution network is sufficient, the power of the power distribution network is stored to the external power supply through the energy storage unit, so that a charging and storing integrated system is realized, and the load of the power distribution network is reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (15)

1. A centralized charging cabinet, comprising:
the charging cabinet body is internally provided with an isolation region and a charging region;
an isolation transformer disposed within the isolation region;
at least one charging unit disposed within the charging region; each charging unit is electrically connected with the secondary winding of the isolation transformer through a plurality of first connecting structures; and the plurality of first connection structures are located in a back surface area of the charging region.
2. The centralized charging cabinet of claim 1, wherein the charging unit comprises: the charging control module is electrically connected with the M charging modules;
the rear end of each charging module is provided with a first row of quick plug terminals;
the rear end of the charging control module is provided with a second row of quick plug terminals and a third row of quick plug terminals;
the first row of quick plug terminals are correspondingly connected with the second row of quick plug terminals one by one, and the corresponding quick plug terminals are connected through a connecting bus; the first row of quick plug terminals, the second row of quick plug terminals, the third row of quick plug terminals and the connecting bus bar are all located in the back area of the charging area;
wherein M is a positive integer greater than or equal to 1.
3. The centralized charging cabinet of claim 2, wherein the third row of quick-connect terminals comprises: a plurality of input terminals and a plurality of output terminals;
the input terminals are correspondingly connected with one ends of the first connecting structures one by one.
4. The centralized charging cabinet of claim 3, wherein:
a power distribution unit electrically connected with external charging equipment is also arranged in the charging area;
wherein the charging unit is electrically connected with the power distribution unit through a plurality of second connection structures; and the plurality of second connection structures are located at a back region of the charging region.
5. The centralized charging cabinet of claim 4, wherein:
a plurality of output terminals of the third row of quick plug terminals are correspondingly connected with one ends of a plurality of second connecting structures one by one, and the second connecting structures are electrically connected with the power distribution unit through second connecting lines so as to realize the electrical connection of the charging unit and the power distribution unit;
the second connecting line is connected to the power distribution unit along the bottom of the charging cabinet body so as to be electrically connected with the second connecting structure.
6. The centralized charging cabinet of claim 1, wherein:
the primary winding of the isolation transformer is arranged in the front area of the isolation area and is connected with the power distribution network;
and the secondary winding of the isolation transformer is arranged in the back area of the isolation area.
7. The centralized charging cabinet of claim 3, wherein:
the secondary winding of the isolation transformer is electrically connected with the first connecting structure through a first connecting wire so as to realize the electrical connection of the charging unit and the secondary winding of the isolation transformer;
the first connecting line enters the charging area from the isolation area along the top of the charging cabinet body so as to be electrically connected with the first connecting structure.
8. The centralized charging cabinet of claim 4, wherein at least one energy storage unit is further disposed within the charging region;
each energy storage unit is electrically connected with the secondary winding of the isolation transformer through a plurality of third connecting structures; each energy storage unit is also electrically connected with a power distribution unit through a plurality of fourth connecting structures, and the energy storage units are electrically connected with an external battery through the power distribution units;
the plurality of third connection structures and the plurality of fourth connection structures are respectively located in a back area of the charging area.
9. The centralized charging cabinet according to claim 8, wherein the external battery is a battery with a capacity exceeding a first threshold, the charging area is provided with an energy storage unit with a capacity exceeding a second threshold, and the energy storage unit is correspondingly connected with the battery through the power distribution unit; or
The external batteries are batteries with the capacity smaller than a third threshold value, the charging area is provided with a plurality of energy storage units with the capacity smaller than a fourth threshold value, and the energy storage units are electrically connected with the batteries in a one-to-one correspondence mode through the power distribution unit.
10. The centralized charging cabinet of claim 8, wherein the energy storage unit comprises an energy storage control module and L energy storage modules; the energy storage control module is electrically connected with the L energy storage modules;
the rear end of each energy storage module is provided with a fourth row of quick plug terminals;
the rear end of the energy storage control module is provided with a fifth row of quick plug terminals and a sixth row of quick plug terminals;
the fourth row of quick plug terminals are correspondingly connected with the fifth row of quick plug terminals one by one, and the corresponding quick plug terminals are connected through a connecting bus; the fourth row of quick plug terminals, the fifth row of quick plug terminals, the sixth row of quick plug terminals and the connecting bus bar are all located in the back area of the charging area;
wherein L is a positive integer greater than or equal to 1.
11. The centralized charging cabinet of claim 10, wherein the sixth row of quick-connect terminals comprises a plurality of input terminals connected in a one-to-one correspondence with one end of the third plurality of connection structures and a plurality of output terminals connected in a one-to-one correspondence with one end of the fourth plurality of connection structures;
the secondary winding of the isolation transformer is electrically connected with the other end of the third connecting structure through a third connecting wire, and the third connecting wire enters the charging area from the isolation area along the top of the charging cabinet body;
the fourth connection structure is electrically connected with the power distribution unit through a fourth connection line, and the fourth connection line is connected to the power distribution unit along the bottom of the charging cabinet body.
12. The centralized charging cabinet according to claim 1, wherein an auxiliary area is further disposed inside the charging cabinet body, and one or a combination of the following is disposed in the auxiliary area:
an auxiliary power supply and a monitoring unit;
wherein the content of the first and second substances,
the monitoring unit comprises a monitor and a communication module;
the auxiliary power supply is electrically connected with the secondary winding of the isolation transformer; or the auxiliary power supply is respectively and electrically connected with the secondary winding of the isolation transformer, the monitor and the communication module;
the monitor is electrically connected with the at least one charging unit and the communication module respectively;
the communication module is electrically connected with an external central control management platform.
13. The centralized charging cabinet of claim 12, wherein:
the isolation transformer is connected with a power distribution network through a power distribution cabinet of the power grid;
the monitor is connected with the power grid power distribution cabinet and used for acquiring the opening and closing state of the isolation area door and sending a disconnection instruction to the power grid power distribution cabinet when the opening and closing state is determined to be an abnormal opening state so as to disconnect the electric connection between the power distribution network and the charging cabinet.
14. The centralized charging cabinet of claim 2, wherein a cooling fan and a control module are disposed in the charging control module, and the cooling fan is disposed on a front panel of the charging control module.
15. The centralized charging cabinet of claim 2, further comprising: a water cooling machine;
a main water inlet pipe, a main water outlet pipe, at least one branch water inlet pipe and at least one branch water outlet pipe are arranged in the charging cabinet body, and two heat dissipation ports are arranged on each charging module;
the output end of the water-cooling machine is connected with the main water inlet pipe, and the input end of the water-cooling machine is connected with the main water outlet pipe;
each branch water inlet pipe is connected with the main water inlet pipe, and each branch water outlet pipe is connected with the main water outlet pipe; and two heat dissipation ports of each charging module are respectively connected with one branch water outlet pipe and one branch water inlet pipe.
CN201911244784.1A 2019-04-18 2019-12-06 Centralized charging cabinet Pending CN111835055A (en)

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US16/851,089 US11588337B2 (en) 2019-04-18 2020-04-16 Centralized charging cabinet provided with isolation area and charging area
ES20170235T ES2934597T3 (en) 2019-04-18 2020-04-17 Centralized charging cabinet
EP20170235.4A EP3726695B1 (en) 2019-04-18 2020-04-17 Centralized charging cabinet

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