CN112421604A - Charging device of interconnection - Google Patents
Charging device of interconnection Download PDFInfo
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- CN112421604A CN112421604A CN202011438642.1A CN202011438642A CN112421604A CN 112421604 A CN112421604 A CN 112421604A CN 202011438642 A CN202011438642 A CN 202011438642A CN 112421604 A CN112421604 A CN 112421604A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
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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
- B60L53/63—Monitoring or controlling charging stations in response to network capacity
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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
- B60L53/67—Controlling two or more charging stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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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 invention provides an interconnected charging device, which comprises a plurality of power modules and a controller, wherein the power modules are electrically connected with each other through contactors respectively, and the contactors are electrically connected with the controller; each power module includes at least three power cells electrically connected to the charge terminal. According to the technical scheme, the power units can realize the functions of internal distribution and external distribution of the device through an interconnection technology, so that interconnection of multiple sets of equipment or the power units of the whole charging station is realized, the utilization rate of the power units is improved, the maximum output power of single equipment is improved, the idle rate of the power units is reduced, and meanwhile, the later transformation that the capacity increase is needed to meet the requirement of quick charging due to the occurrence of high-power electric vehicles is reduced.
Description
Technical Field
The present disclosure relates to charging devices, and particularly to a charging device.
Background
With the advance of new energy, electric vehicles are rapidly developing. People have higher and higher power requirements on electric automobiles, and the requirement on quick charging is higher and higher. However, the power distribution technology of the existing charging device is limited to one set of device, and the distribution path is single, and the power utilization rate is not good; and the electric automobile with high power needs to be charged, and when the power of a single set of charging facility cannot meet the maximum requirement of a single vehicle, the quick charging needs to be realized through capacity expansion, so that the cost is increased.
Disclosure of Invention
Aiming at the technical problems, the invention discloses an interconnected charging device, which can solve the problem of distribution paths, can also expand the power distribution technology between devices, and enables power units to completely realize interconnection and intercommunication of the power units through in-device distribution and out-device distribution technologies, thereby improving the utilization rate of power.
In contrast, the technical scheme adopted by the invention is as follows:
the charging device comprises a plurality of power modules and a controller, wherein the power modules are electrically connected with each other through contactors to form a bridging structure, and the contactors are electrically connected with the controller; each power module includes at least three power cells electrically connected to the charge terminal.
By adopting the technical scheme, the contactors are controlled by the controller to realize the communication between the power modules, so that the power distribution between the power modules is realized. Wherein, power module can be for filling electric pile, charging terminal is the rifle that charges.
As a further improvement of the invention, at least two power modules are electrically connected with each other through a first contactor to form a charging group, and the two charging groups are electrically connected through a second contactor to form a bridging structure for external power distribution; the first contactor and the second contactor are electrically connected with the controller.
By adopting the technical scheme, the external power distribution in the charging group can be realized by controlling the switches of the first contactors, the external power distribution among the charging groups can be realized by controlling the switches of the second contactors, the idle rate of the power unit is reduced, the maximum output power of a single device is improved, and the requirement improvement of the quick charging which is required by capacity increasing and is met by the aid of a high-power electric automobile in the later stage can be reduced.
As a further improvement of the present invention, each power module includes at least 3 power units electrically connected to the charging terminal, the power units are electrically connected to each other through a third contactor, and the third contactor is electrically connected to the controller for performing intra-power distribution. By adopting the technical scheme, the controller can control the switch of each third contactor, so that the power distribution in each power module is realized, and the power utilization efficiency in each power module is improved.
As a further improvement of the present invention, the interconnected charging devices include first to nth charging groups, and the power modules in each charging group are electrically connected to the power modules in the other two charging groups through second contactors; wherein n is a natural number not less than 2. Furthermore, the power module in each charging group is correspondingly and electrically connected with the power modules in the other two charging groups through the second contactor.
As a further improvement of the present invention, the first to nth charging groups include the same number of power modules.
As a further improvement of the invention, each charging group comprises four power modules, and the four power modules in each charging group are electrically connected through a first contactor to form a cross-shaped ring structure.
Furthermore, the interconnected charging device comprises a first charging group and a second charging group, the first charging group comprises a first power module, a second power module, a third power module and a fourth power module, the second charging group comprises a fifth power module, a sixth power module, a seventh power module and an eighth power module, and the first power module, the second power module, the third power module and the fourth power module are respectively and electrically connected through a first contactor to form a cross-shaped annular structure; and the first power module and the sixth power module, the second power module and the fifth power module, the third power module and the eighth power module, and the fourth power module and the seventh power module are electrically connected through second contactors, so as to form a bridging structure.
As a further improvement of the present invention, each power module includes 4 groups of power units, and the 4 groups of power units are electrically connected with each other through a third contactor to form a cross-shaped ring structure; and realizing intra-power distribution.
Specifically, each power module comprises a first power unit electrically connected with a first charging terminal, a second power unit electrically connected with a second charging terminal, a third power unit electrically connected with a third charging terminal, and a fourth power unit electrically connected with a fourth charging terminal, wherein the first power unit, the second power unit, the third power unit, and the fourth power unit are electrically connected through a third contactor respectively to form a cross-shaped annular structure.
Compared with the prior art, the invention has the beneficial effects that:
according to the technical scheme, the power units can realize the functions of internal distribution and external distribution of the device through an interconnection technology, so that interconnection of multiple sets of equipment or the power units of the whole charging station is realized, the utilization rate of the power units is improved, the maximum output power of single equipment is improved, the idle rate of the power units is reduced, and meanwhile, the later transformation that the capacity increase is needed to meet the requirement of quick charging due to the occurrence of high-power electric vehicles is reduced.
Drawings
Fig. 1 is a schematic diagram of an external distribution model of an interconnected charging device according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of an internal distribution model of each power module of embodiment 1 of the present invention.
Fig. 3 is a circuit schematic diagram of an internal distribution model of each power module of embodiment 1 of the present invention.
Fig. 4 is a schematic circuit diagram of an external distribution model of an interconnected charging device according to embodiment 1 of the present invention.
Fig. 5 is an application explanatory diagram of an interconnected charging device according to embodiment 1 of the present invention, where a) is a schematic diagram of interconnection between a # 1 pile and # 2 to # 4 piles, b) is a schematic diagram of interconnection between a # 1 pile and # 2, # 3, and # 6 piles, c) is a schematic diagram of interconnection between a # 1 pile and # 2 piles, and # 5, and # 6 piles, and d) is a schematic diagram of interconnection between a # 1 pile and other charging piles to achieve rapid capacity increase.
Fig. 6 is a schematic diagram of an internal distribution model of power modules of an interconnected charging device according to embodiment 2 of the present invention.
Fig. 7 is a circuit schematic diagram of an internal distribution model of a power module according to embodiment 2 of the present invention.
Fig. 8 is a schematic diagram of an external distribution model of an interconnected charging device in embodiment 2 of the present invention.
Fig. 9 is a schematic circuit diagram of an external distribution model of an interconnected charging device according to embodiment 2 of the present invention.
Fig. 10 is a schematic diagram of an internal distribution model of power modules of an interconnected charging device according to embodiment 3 of the present invention.
Fig. 11 is a circuit schematic diagram of an internal distribution model of a power module according to embodiment 3 of the present invention.
Fig. 12 is a schematic diagram of an external distribution model of an interconnected charging device according to embodiment 3 of the present invention.
Fig. 13 is a schematic circuit diagram of an external distribution model of an interconnected charging device according to embodiment 3 of the present invention.
Fig. 14 is a schematic diagram of an external distribution model of an interconnected charging device according to embodiment 4 of the present invention.
Fig. 15 is a schematic circuit diagram of an external distribution model according to embodiment 4 of the present invention.
The reference numerals include:
1-a first power module, 2-a second power module, 3-a third power module, 4-a fourth power module, 5-a fifth power module, 6-a sixth power module, 7-a seventh power module, 8-an eighth power module;
11-a first power unit, 12-a second power unit, 13-a third power unit, 14-a fourth power unit;
21-a first power module, 22-a second power module, 23-a third power module, 24-a fourth power module; 25-a fifth power module; 26-a sixth power module;
31-a first power unit, 32-a second power unit, 33-a third power unit;
41-a first power module, 42-a second power module, 43-a third power module, 44-a fourth power module, 45-a fifth power module, 46-a sixth power module, 47-a seventh power module, 48-an eighth power module;
51-a first power unit, 52-a second power unit, 53-a third power unit, 54-a fourth power unit;
61-a first power module, 62-a second power module, 63-a third power module, 64-a fourth power module, 65-a fifth power module.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
Example 1
As shown in fig. 1, an interconnected charging device includes a plurality of power modules and a controller, where at least four power modules are electrically connected to each other through a first contactor to form a charging group, and two charging groups are electrically connected through a second contactor to form a bridging structure for external power distribution; the first contactor and the second contactor are electrically connected with the controller.
Specifically, as shown in fig. 1, in this embodiment, the interconnected charging device includes a first charging group and a second charging group, the first charging group includes a first power module 1, a second power module 2, a third power module 3, and a fourth power module 4, the second charging group includes a fifth power module 5, a sixth power module 6, a seventh power module 7, and an eighth power module 8, and the first power module 1, the second power module 2, the third power module 3, and the fourth power module 4 are electrically connected through a first contactor to form a cross-shaped ring structure; the first power module 1 and the sixth power module 6, the second power module 2 and the fifth power module 5, the third power module 3 and the eighth power module 8, and the fourth power module 4 and the seventh power module 7 are electrically connected through a second contactor, respectively, so as to form a bridging structure.
As shown in fig. 2 and 3, each power module includes 4 power units, that is, a first power unit 11 electrically connected to the first charging gun a, a second power unit 12 electrically connected to the second charging gun b, a third power unit 13 electrically connected to the third charging gun c, and a fourth power unit 14 electrically connected to the fourth charging gun d, and the first power unit 11, the second power unit 12, the third power unit 13, and the fourth power unit 14 are electrically connected to each other through a third contactor to form a cross-ring structure, that is:
the first power unit 11 is electrically connected to the second power unit 12 through the third contactor 2K1, the second power unit 12 is electrically connected to the third power unit 13 through the third contactor 2K2, the third power unit 13 is electrically connected to the fourth power unit 14 through the third contactor 2K3, the first power unit 11 is electrically connected to the third power unit 13 through the third contactor 2K4, the second power unit 12 is electrically connected to the fourth power unit 14 through the third contactor 2K5, and the first power unit 11 is electrically connected to the fourth power unit 14 through the third contactor 2K 6. The third contactor 2K1, the third contactor 2K2, the third contactor 2K3, the third contactor 2K4, the third contactor 2K5 and the third contactor 2K6 are all electrically connected with a controller, the third contactors 2K 1-2K 6 are high-voltage direct-current contactor groups, and the controller controls the on and off of each third contactor, so that the power distribution is carried out in the power distribution.
Further, the second power unit 12 of the first power module 1 is electrically connected to the second power unit 12 of the second power module 2 through the first contactor 3K1, the third power unit 13 of the first power module 1 is electrically connected to the third power unit 13 of the third power module 3 through the first contactor 3K2, and the fourth power unit 14 of the first power module 1 is electrically connected to the fourth power unit 14 of the fourth power module 4 through the first contactor 3K 3. The fourth power unit 14 of the second power module 2 is electrically connected with the fourth power unit 14 of the third power module 3 through the first contactor 3K4, and the third power unit 13 of the second power module 2 is electrically connected with the third power unit 13 of the fourth power module 4 through the first contactor 3K 5; the second power unit 12 of the third power module 3 is electrically connected to the second power unit 12 of the fourth power module 4 through the first contactor 3K 6. The second power unit 12 of the fifth power module 5 is electrically connected with the second power unit 12 of the sixth power module 6 through the first contactor 4K1, the third power unit 13 of the fifth power module 5 is electrically connected with the third power unit 13 of the seventh power module 7 through the first contactor 4K2, and the fourth power unit 14 of the fifth power module 5 is electrically connected with the fourth power unit 14 of the eighth power module 8 through the first contactor 4K 3; the fourth power unit 14 of the sixth power module 6 is electrically connected with the fourth power unit 14 of the seventh power module 7 through the first contactor 4K4, and the third power unit 13 of the sixth power module 6 is electrically connected with the third power unit 13 of the eighth power module 8 through the first contactor 4K 5; the second power unit 12 of the seventh power module 7 is electrically connected to the second power unit 12 of the eighth power module 8 via the first contactor 4K 6.
As shown in fig. 4, the first power unit 11 of the first power module 1 is electrically connected to the first power unit 11 of the sixth power module 6 through the second contactor 5K1, the first power unit 11 of the second power module 2 is electrically connected to the first power unit 11 of the fifth power module 5 through the second contactor 5K2, the first power unit 11 of the third power module 3 is electrically connected to the first power unit 11 of the eighth power module 8 through the second contactor 5K3, and the first power unit 11 of the fourth power module 4 is electrically connected to the first power unit 11 of the seventh power module 7 through the second contactor 5K 4.
The first contactors 3K 1-3K 6, the first contactors 4K 1-4K 6 and the second contactors 5K 1-5K 4 are electrically connected with a controller respectively, and the first contactors 3K 1-3K 6, the first contactors 4K 1-4K 6 and the second contactors 5K 1-5K 4 are high-voltage direct-current contactors. The switches of the contactors are controlled by a controller, thereby controlling the external distribution of power.
By adopting the technical scheme of the embodiment, the internal distribution adopts a cross-ring design scheme, 4 groups of power units are arranged in each set of charging device, namely a power module, the power units are electrically connected together through a high-voltage direct-current contactor, and the 4 groups of power units are interconnected and intercommunicated through 6 groups of high-voltage direct-current contactors in combination with a control algorithm, so that the purpose of reasonably distributing power is achieved. Each group of power units is electrically connected with one charging gun. The external distribution adopts a design scheme of cross ring and bridging, 8 sets of charging piles, namely power modules on a graph, are interconnected by power modules between piles through 16 groups of high-voltage direct-current contactors, and the interconnection and intercommunication of the power modules between the charging piles are realized by combining a control algorithm. Through the design scheme of internal power distribution and external power distribution, the high-voltage direct-current contactor is matched with a control algorithm to realize interconnection and intercommunication of the whole charging system, the distribution path of the power unit is expanded to the maximum extent, interconnection and intercommunication of a plurality of sets of equipment or the whole charging station is realized, the utilization rate of the power unit and the maximum output power of the charging device are improved, and the multi-path and speed-increasing effect is achieved.
For example, as shown in fig. 5, the first power module 1 to the eighth power module 8 correspond to the charging piles 1# -8 #, the power of the charging piles 1# -8 # is 30kW, the BMS requirement of the existing electric vehicle connected with the pile 1# is 120kW, and 90kW power can be obtained from the pile 2# -4 # through the interconnection technology to meet the 120kW output requirement, as shown in fig. 5 a); if the 4# pile is occupied, 90kW of power can be obtained from the 2#, 3#, 6# piles through the interconnection technology to meet the 120kW output requirement, as shown in fig. 5 b); if 3# and 4# piles are occupied, the 2# pile loop can be used to obtain 5# pile power through the interconnection technology so as to meet the 120kW output requirement, as shown in FIG. 5 c).
The maximum allowable charging multiplying power of the electric automobile can be guaranteed by meeting the required power, and the optimal charging experience is brought to the automobile owner. Assuming a 120kW demand for 1C charging, the charging time to meet the 120kW demand would only require 1 hour, but if only 30kW of charging power could be provided at this time, the system could only charge at 1/4C, with the charging time increasing to 4 hours.
The diversity of distribution path that interconnection and intercommunication technique realized not only improves the utilization ratio of power but also is equivalent to increased the redundant design of system, makes to fill electric pile and can be more suitable for the complicated service condition in scene.
The above is a description of the multipath effect, and the following is a description of the velocity-increasing effect. The power of the charging piles of # 1 to # 8 is 30kW, the BMS requirement of the electric vehicle connected with the existing # 1 pile is 240kW, the power of the charging piles in all stations can be gathered to the output of the # 1 pile rapidly through the interconnection technology, and as shown in fig. 5 d), the maximum output power of single equipment is improved, the purpose of rapid capacity increase without transformation is achieved, and the flexibility of system capacity increase and the utilization rate of the idle charging pile are greatly improved.
The above case description is also applicable to charging piles in other locations, and further description is given below for variations of the in-power distribution and the out-of-power distribution.
Example 2
As shown in fig. 6 to 9, in the charging device of the present invention, based on embodiment 1, an internal distribution model is changed, an internal distribution unit is decreased, and an external distribution is increased, as shown in fig. 6 and 8. For the reduced interior distribution unit, specifically, as shown in fig. 6 and 7, each power module, that is, the charging pile or the charging device, includes three power units, that is, a first power unit 31, a second power unit 32, and a third power unit 33, where the first power unit 31, the second power unit 32, and the third power unit 33 are electrically connected to each other through a third contactor; the first power unit 31, the second power unit 32 and the third power unit 33 are respectively and correspondingly electrically connected with a charging gun a, a charging gun b and a charging gun c, the first power unit 31 is electrically connected with the second power unit 32 through a third contactor 2K1, the second power unit 32 is electrically connected with the third power unit 33 through a third contactor 2K2, the first power unit 31 is electrically connected with the third power unit 33 through a third contactor 2K3, and the third contactor 2K 1-2K 3 represents a high-voltage direct-current contactor group.
As shown in fig. 8, an external distribution is added, which includes first power modules 21 to N +2 th power modules, three power modules are electrically connected through a first contactor to form a charging group, one charging group is electrically connected with another two charging groups through a second contactor, and each power module includes three power units of the above-described electrically connected structure. Specifically, as shown in fig. 9, the first power unit of the first power module 21 is electrically connected to the first power unit of the second power module 22 through the first contactor 3K1, the third power unit of the first power module 21 is electrically connected to the third power unit of the third power module 23 through the first contactor 3K2, and the second power unit of the second power module 22 is electrically connected to the second power unit of the third power module 23 through the first contactor 3K 3. The same applies to the charging groups formed by the fourth power module 24 to the sixth power module 26, in which the first power unit of the fourth power module 24 is electrically connected to the first power unit of the fifth power module 25 through the first contactor 4K1, the third power unit of the fourth power module 24 is electrically connected to the third power unit of the sixth power module 26 through the first contactor 4K2, and the second power unit of the fifth power module 25 is electrically connected to the second power unit of the sixth power module 26 through the first contactor 4K 3. By analogy, the first power unit of the nth power module is electrically connected with the first power unit of the (N + 1) th power module through the first contactor nK1, the third power unit of the (N + 1) th power module is electrically connected with the third power unit of the (N + 2) th power module through the first contactor nK2, and the second power unit of the (N + 1) th power module is electrically connected with the second power unit of the (N + 2) th power module through the first contactor nK 3. The first contactors 3K 1-3K 3, … … nK 1-nK 3, the second contactors and the third contactors 2K 1-2K 3 are electrically connected with the controller respectively, and the controller controls power internal distribution and power external distribution.
Example 3
An interconnected charging device is additionally provided with an external distribution unit on the basis of embodiment 1, as shown in fig. 10. Each power module of the charging device, that is, the internal distribution structure of the charging pile, is the same as that in embodiment 1, that is, each power module includes four power units, namely, a first power unit 51, a second power unit 52, a third power unit 53, and a fourth power unit 54, the four power units are respectively electrically connected to the charging gun, the four charging units are electrically connected to each other through third contactors 2K 1-2K 6 to form a cross ring structure, and the circuit diagram is as shown in fig. 11, wherein the third contactors 2K 1-2K 6 are high-voltage direct-current contactor sets and are electrically connected to the controller, so as to realize internal distribution in power.
The present embodiment is different from embodiment 1 in that the present embodiment includes a first power module 41, a second power module 42, a third power module 43, a fourth power module 44, a fifth power module 45, a sixth power module 46, a seventh power module 47, an eighth power module 48, and … … N +3 power modules, every four power modules are electrically connected through a first contactor to form a cross ring structure, so as to form a charging group, there are (N + 3)/4 charging groups, each charging group is electrically connected with two other charging groups through a second contactor to form a bridging structure, the first contactor and the second contactor are respectively electrically connected with a controller, so as to implement external power distribution, a specific external distribution model diagram is shown in fig. 12, and a circuit diagram is shown in fig. 13.
Example 4
In this embodiment, the inner allocation model is not limited, and the outer allocation is added. As shown in fig. 14 to 15, each power module may include n power units, each power unit is electrically connected to one charging gun, and each power unit is electrically connected to two power units through a third contactor, so as to form a ring structure.
As shown in fig. 14 to 15, the present embodiment includes N power modules, that is, includes a first power module 61, a second power module 62, a third power module 63, a fourth power module 64, a fifth power module 65, and … … N power modules, each power module is electrically connected to two power modules through a first contactor to form a ring structure, that is, the first power module 61 is electrically connected to the second power module 62 through a contactor K1, the second power module 62 is electrically connected to the third power module 63 through a contactor K2, the third power module 63 is electrically connected to the fourth power module 64 through a contactor K3, according to this rule, finally, the N-1 power module is electrically connected to the N power module through a contactor Kn, and the first power module is electrically connected to the N power module through a contactor Kn +1, as shown in fig. 14. The third contactor and the first contactors K1-Kn + 1 are all high-voltage direct-current contactor groups and are electrically connected with the controller respectively, and the controller realizes power external distribution by controlling the on-off of the first contactors.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. An interconnection charging device, its characterized in that: the power module comprises a plurality of power modules and a controller, wherein the power modules are electrically connected with each other through contactors respectively, and the contactors are electrically connected with the controller; each power module includes at least three power cells electrically connected to the charge terminal.
2. The interconnected charging device of claim 1, wherein: at least two power modules are electrically connected with each other through a first contactor to form a charging group, and the two charging groups are electrically connected through a second contactor to form a bridging structure for external power distribution; the first contactor and the second contactor are electrically connected with the controller.
3. The interconnected charging device of claim 2, wherein: the power units are electrically connected through a third contactor, and the third contactor is electrically connected with the controller to perform internal power distribution.
4. The interconnected charging device of claim 3, wherein: the charging system comprises a first charging group to an nth charging group, wherein a power module in each charging group is correspondingly and electrically connected with power modules in the other two charging groups through a second contactor; wherein n is a natural number not less than 2.
5. The interconnected charging device of claim 4, wherein: the first to nth charging groups include the same number of power modules.
6. The interconnected charging device of claim 5, wherein: each charging group comprises four power modules, and the four power modules in each charging group are electrically connected through a first contactor to form a cross annular structure.
7. The interconnected charging device of claim 5, wherein: each power module comprises 4 groups of power units, and the 4 groups of power units are electrically connected with each other through third contactors to form a cross-shaped annular structure.
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