CN210821864U - Pluggable or movable charging station system arranged in power plant - Google Patents

Pluggable or movable charging station system arranged in power plant Download PDF

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Publication number
CN210821864U
CN210821864U CN201921209881.2U CN201921209881U CN210821864U CN 210821864 U CN210821864 U CN 210821864U CN 201921209881 U CN201921209881 U CN 201921209881U CN 210821864 U CN210821864 U CN 210821864U
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China
Prior art keywords
charging
power plant
battery
power
pluggable
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CN201921209881.2U
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崔华
杨豫森
黄晓辉
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Hep Energy And Environment Technology Co ltd
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Hep Energy And Environment Technology Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations

Abstract

The utility model provides a pluggable or movable charging station system arranged in a power plant, which comprises a power plant centralized control system of the power plant and a pluggable or movable charging station arranged in the power plant; the charging station comprises a charging and discharging control cabinet and a pluggable or movable modular charging battery; the charging and discharging control cabinet is electrically connected with the modularized rechargeable battery and is used for controlling charging and discharging of the modularized rechargeable battery; at least one of an outlet bus of a generator of a power plant, a bus of a booster station and a bus of service power is electrically connected to an alternating current input end of the charge and discharge control cabinet through a switch respectively; and the power plant centralized control system is in control connection with each switch and the charging and discharging control cabinet. The utility model discloses can realize utilizing the low-priced electric power in the power plant to carry out large capacity, concentrate, high-efficient, safe rechargeable battery's energy storage and use.

Description

Pluggable or movable charging station system arranged in power plant
Technical Field
The utility model relates to a charging station technical field, concretely relates to but plug or mobile charging station system of setting in power plant.
Background
Generally, electric energy cannot be stored (the current battery energy storage is high in cost and limited in energy storage), so that the power plant needs to synchronously generate more electric energy according to the electric energy required by a user, and energy is not wasted. However, the required electrical load of each power plant in the power system is usually changed constantly, and in order to maintain the active power balance and keep the system frequency stable, the power generation department needs to correspondingly change the power generation amount of the generator to adapt to the change of the electrical load, which is called peak shaving.
In the three northeast regions of China, the capacity of an electric power market is rich, peak-adjustable power supplies such as a gas turbine and pumped storage are scarce, the contradiction between peak adjustment of a power grid and the flexibility of a thermal power generating unit is prominent, the capacity of the power grid for absorbing new energy such as wind power, photoelectricity, hydropower and nuclear power is insufficient, and the phenomena of wind abandoning, light abandoning, water abandoning and nuclear power abandon are serious.
On the other hand, under the high concern of global energy conservation and environmental protection, new energy automobiles are in the process of transportation, and in recent years, the market of the new energy automobiles in China is continuously heated and is in a rapid development state. The scale of new energy automobiles in China is continuously enlarged, the demand on charging piles is increased day by day, but the construction quantity of the charging piles in China is far lower than the sales volume of the new energy automobiles, the current situation of difficult charging is increasingly prominent, and the development of the new energy automobiles is severely restricted by the slow development of the charging piles.
The battery replacement mode based on the battery rental mode in cooperation with the large-scale centralized charging has become a competitive business technology mode for the development of the current electric vehicles, because: 1) the car purchasing cost of the user can be reduced by adopting a battery rental mode; 2) the centralized charging of the battery can adopt a slow charging mode, so that the shortening of the service life of the battery caused by improper charging is avoided; 3) the fluctuation of the power grid caused by random charging of the electric automobile can be reduced by carrying out centralized management on the batteries; 4) the battery under the replacement can be utilized in echelon at the centralized charging station, so that the utilization rate of the battery is improved, and the secondary pollution of the battery to the environment is reduced.
The battery swapping mode based on battery lease is practically applied and popularized in countries such as Israel, Canada, Australia and Denmark; as an active participant in the electric vehicle industry, the national grid company and the southern grid company are also preparing to adopt an electric vehicle development mode mainly for battery replacement, and in terms of charging, the national grid company also defines a business mode of "centralized charging and unified distribution".
The centralized charging station can be regarded as a large-scale charging load, is used as an energy storage unit, can also be used as a standby power supply of a system when conditions are mature, and along with the development of batteries, the electric quantity can become a commodity in the future, and the commodity can be sold in a supermarket, and the electric quantity of a large-scale business or a user can be completely derived from a centralized replaceable charging battery.
However, in practice, the centralized charging station built on the grid side has the problems of difficulty in land acquisition in urban areas, high charging price on the load side of the grid, complex peak-valley price policy, difficulty in implementation and the like, so that a lot of difficulties are encountered in implementation of such projects, and the number of projects implemented domestically at present is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but plug or mobile charging station system of setting in the power plant, can realize utilizing the low-priced electric power in the power plant to carry out large capacity, concentrate, high-efficient, safe rechargeable battery's energy storage and use, the power plant can obtain the peak regulation subsidy from this, the charging station then can obtain with this and minimum be the cost price of charging of burden price to overcome the not enough and the difficult problem of new energy automobile charging of the peak regulation flexibility of present power plant.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pluggable or movable charging station system arranged in a power plant comprises a power plant centralized control system of the power plant and a pluggable or movable charging station arranged in the power plant; the charging station comprises a charging and discharging control cabinet and a pluggable or movable modular charging battery; the charging and discharging control cabinet is electrically connected with the modularized rechargeable battery and is used for controlling charging and discharging of the modularized rechargeable battery; at least one of an outlet bus of a generator of a power plant, a bus of a booster station and a bus of service power is electrically connected to an alternating current input end of the charge and discharge control cabinet through a switch respectively; and the power plant centralized control system is in control connection with each switch and the charging and discharging control cabinet.
Further, at least one of the outlet bus of the generator of the power plant, the bus of the booster station and the bus of the service power is connected to the respective switch via a transformer.
Further, the charging and discharging control cabinet comprises an inverter and a charging control unit; the alternating current input end of the inverter is electrically connected to the output end of each switch, and the direct current output end of the inverter is electrically connected to the charging end of the modular rechargeable battery; the charging control unit is connected with the modularized rechargeable battery in a control mode and is used for controlling charging and discharging of the modularized rechargeable battery.
Further, the power plant includes any one of a thermal power plant, a hydraulic power plant, and a nuclear power plant.
Further, the electric energy output end of the charging and discharging control cabinet is electrically connected with the bus of the booster station through a switch and a transformer.
Furthermore, the pluggable or movable modular rechargeable battery is any one or combination of a lithium ion battery, a nickel-hydrogen or nickel-cadmium battery, a lead-acid battery, a nickel-hydrogen storage battery, a sodium-sulfur storage battery, a sodium ion battery, a nickel-zinc storage battery, a zinc-air storage battery and a super capacitor.
The beneficial effects of the utility model reside in that:
1. the utility model discloses utilize the in-plant resource of power plant, including the project open space that has a large amount of second phase or future project extensions in the general power plant, or the open space such as power plant coal yard establishes the charging station, can effectively practice thrift land used resource;
2. in addition, the cost and the price of electricity in the power plant are low, if the deep peak-shaving price of electricity in the power plant is utilized, the charging cost is lower, some power plants can utilize a battery of a centralized charging station to participate in the grid frequency modulation auxiliary service, negative price charging can be realized, namely the more charging, the more profit is;
3. utilize operation and technical staff and management team in the power plant, carry out professional operation and maintenance to centralized charging station, not only can guarantee the safe operation of charging station, facility such as safety, fire control, voltage transformation in the power plant can all directly be applied to the charging station moreover, compare the newly-built charging station of urban area electric wire netting load side, but its total investment greatly reduced.
4. The pluggable modular rechargeable battery pack is used for selling directly to the outside after being fully charged with electricity, the rechargeable battery assets are checked, the investment is rapidly recovered by using the battery deposit, the external selling circulation of the battery is realized, and the supermarket selling electric power is realized.
Drawings
Fig. 1 is a schematic diagram of a system structure according to embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a system structure according to embodiment 2 of the present invention;
fig. 3 is a schematic diagram of a system structure according to embodiment 3 of the present invention.
Fig. 4 is a schematic diagram of the overall relationship between the power plant, the charging station and the power grid in the system according to embodiments 1-4 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.
Example 1
This embodiment provides a pluggable or portable charging station system of setting in the power plant, can utilize the charge-discharge of the rechargeable battery group in the charging station, respond to any one of electric wire netting auxiliary service such as electric wire netting peak shaver, frequency modulation, black start, interruptible electric power storage load, the modularization rechargeable battery who is fully charged can directly pull out the dismantlement from the charging control cabinet of charging station, directly sell or directly rent to the outside, the modularization rechargeable battery that the user used up the electric quantity retrieves the power plant, install and recharge in the charging control cabinet of charging station.
Specifically, as shown in fig. 1, the system of the present embodiment includes a high-voltage transformer 1, a high-voltage switch 2, a medium-voltage transformer 3, a medium-voltage switch 4, a plant power transformer 5, a plant substation switch 6, and a charging station, where the charging station includes a charging and discharging control cabinet 7 and a rechargeable battery 8; the charging and discharging control cabinet 7 is electrically connected to the rechargeable battery 8 and is used for controlling charging and discharging of the rechargeable battery 8; the input end of the medium voltage transformer 3 is electrically connected to the output end of the generator 100 of the power plant, and the output end of the medium voltage transformer is electrically connected to the alternating current input end of the charge and discharge control cabinet 7 through a medium voltage switch 4; the input end of the high-voltage transformer 1 is electrically connected to the output end bus of the booster station 101 of the power plant, and the output end of the high-voltage transformer is electrically connected to the alternating current input end of the charge and discharge control cabinet 7 through the high-voltage switch 2; the power transformer 5 is arranged on a service power line of a power plant and is electrically connected to an alternating current input end of the charge and discharge control cabinet 7 through a power switch 6; the power plant centralized control system 102 of the power plant is respectively in control connection with the high-voltage transformer 1, the high-voltage switch 2, the medium-voltage transformer 3, the medium-voltage switch 4, the plant power transformer 5, the plant transformer switch 6 and the charging and discharging control cabinet 7.
In addition, an outlet bus of a generator of a power plant, a bus of a booster station and a bus of service power can also be directly connected without a transformer and electrically connected with an alternating current input end of the charging and discharging control cabinet 7 through the high-voltage switch 2, the medium-voltage switch 4 and the plant transformer switch 6.
In the present embodiment, the charge and discharge control cabinet 7 includes an inverter and a charge control unit; the alternating current input end of the inverter is electrically connected to the output ends of the high-voltage switch, the medium-voltage switch and the plant transformer switch respectively, and the direct current output end of the inverter is electrically connected to the charging end of the rechargeable battery; the charging control unit is connected with the rechargeable battery in a control mode and is used for controlling charging and discharging of the rechargeable battery.
In this embodiment, the power plant is a thermal power plant. As shown in fig. 1, the power plant unit now mainly includes a steam turbine 103 and a generator 100.
The working principle of the system is as follows:
in the time period that the power plant needs to participate in the deep peak shaving of the power grid, the power grid generally expects the power plant to reduce the deep peak shaving of the generated energy, at the moment, the charging station is used as an energy storage unit, and the electric power generated by the power plant is directly charged to the charging station by using the deep peak shaving load electric power, so that the on-grid electric quantity is reduced, and the peak shaving benefit is obtained.
In this embodiment, the electric energy sources of the charging station mainly include an outlet bus of a generator of the power plant, a bus of the booster station, and a bus of the service power. When the power generation amount of the power plant needs to be reduced, the power grid power dispatching center 104 sends a dispatching instruction to the power plant centralized control system 102 of the power plant, the power plant centralized control system 102 controls one or more of the high-voltage switch 2, the medium-voltage switch 4 and the plant transformer 6 to be closed, controls the medium-voltage transformer 3, the high-voltage transformer 1 and the plant transformer 5 to work, and sends a charging instruction to the charging and discharging control cabinet 7 (charging and discharging control unit), so that output electric energy of an outlet bus of a generator of the power plant, a bus of a booster station and plant electricity is output to the charging and discharging control cabinet 7 through the medium-voltage transformer 3, the high-voltage transformer 1 and the plant transformer 5 respectively, and the charging and discharging control cabinet 7 (inverter) converts alternating current into direct current and then charges a charging battery. The power plant centralized control system 102 acquires charging information of the charging and discharging control cabinet 7, controls the electric quantity supplied to the charging station according to the peak shaving requirement, and when the upper limit of the electric quantity which can be supplied to the charging station is reached, the power plant centralized control system controls the high-voltage switch 2, the medium-voltage switch 4 and the plant transformer 6 to be closed, controls the medium-voltage transformer 3, the high-voltage transformer 1 and the plant transformer 5 to stop working, and controls the charging and discharging control cabinet 7 (charging and discharging control unit) to stop charging the rechargeable battery.
The power plant can obtain the peak regulation subsidy through the peak regulation process, and the charging station can obtain the lowest charging cost price which is the negative electricity price.
In this mode, the charging cost of the charging station is the lowest cost electricity price in the thermal power plant, for example, the electricity generation cost electricity price determined by the coal burning cost of the general northern thermal power plant is 0.3 yuan/kWh, and after the operation cost and the profit of the charging station are added to the operation project company of the charging station, the charging price in the thermal power plant is quoted to the outside for 0.5 yuan. If a charging station is required to transport the charged battery to the customers in the urban area and to install it on the replaceable battery device, then the transport price is added, and the final customer receives the price to be paid for the replacement of the fully charged battery.
At present, the electricity price of the charging market of the electric vehicle is taken in a certain park, and the charging price is 1.2 yuan/degree (electricity price per degree) +0.1983 yuan/degree (service fee unit price) + parking fee (2 yuan/hour), so compared with the current situation, the centralized replaceable rechargeable battery provided by the system of the embodiment has the advantages of price and maintenance cost no matter from the aspects of charging electricity price or service fee and the like.
In practical application, after the rechargeable battery is fully charged by the power supply of the power plant, part of the fully charged rechargeable battery can be sold, the selling mode can adopt a deposit and electricity fee payment mode, and the externally sold rechargeable battery can be used for a vehicle-mounted power battery, a building standby power supply or a main power supply battery, a household standby power supply or a main power supply battery and a low-price battery power supply of a large supermarket data center. And after the customer uses the electric quantity in the battery, the electric quantity is sent back to the charging station.
Example 2
The system structure in this embodiment is substantially the same as that in embodiment 1, and the main difference is that, as shown in fig. 2, in this embodiment, the electric energy output end of the charge and discharge control cabinet is electrically connected to the output end bus of the booster station through a high-voltage switch and a high-voltage transformer. Namely, the output buses of the charging station and the booster station are connected in a bidirectional mode.
When the power grid is in peak demand, the charging station can increase the peak load capacity of the tip of the power plant. Specifically, after the power grid power dispatching center sends a dispatching instruction to the power plant centralized control system, the power plant centralized control system sends a control instruction to the charge and discharge control cabinet and controls the high-voltage switch to be closed, the charge and discharge control cabinet (charge and discharge control unit) controls the rechargeable battery to discharge, and the electric energy of the rechargeable battery is converted into alternating current through the charge and discharge control cabinet (inverter) and is output to the output end bus of the booster station after being boosted, so that the electric energy is collected into a 220kV power grid line.
When the power grid frequency modulation auxiliary service needs the power plant to increase the online electric quantity rapidly, the surplus electric quantity in the charging station can be utilized by the system of the embodiment to realize the response of increasing the online electric quantity by the frequency modulation auxiliary service through the discharge of the rechargeable battery, at the moment, the load of the power plant unit does not need to be changed, and the operation safety of the power plant unit is ensured. Under the condition, if the load demand of the power plant group is increased and decreased by fast responding to the frequency modulation, the steam turbine opening degree is required to be adjusted by fast increasing and decreasing, so that the working condition of the steam turbine is changed violently, and the safety of the power plant is influenced. Other emergency variable working condition adjusting modes, such as measures of quickly reducing fuel quantity of a boiler or throttling condensed water, can influence the operation safety of a power plant unit.
Example 3
The structure of the system of this embodiment is substantially the same as that of embodiment 1, and the main difference is that, as shown in fig. 3, in this embodiment, the power plant is a hydroelectric power plant, and the power plant unit mainly includes a water turbine 103 and a generator 100.
In this mode, the charging cost of the charging station is the lowest cost electricity price in the hydroelectric power plant, for example, the cost electricity price of the hydropower station in the southern rich water period may be as low as 0.1 yuan, after adding the operation cost and profit of the charging station to the operation project company of the charging station, the charging price in the externally quoted hydropower plant is 0.3 yuan, if the charging station is required to transport the fully charged battery to the customers in the urban area and to install the battery on the replaceable battery device, the charging station is added with the transportation price, which is the price to be paid by the final customer to obtain the replaced fully charged battery.
Example 4
The system of this embodiment has substantially the same structure as that of embodiment 1, and the main difference is that in this embodiment, the power plant is a nuclear power plant.
Example 5
This embodiment is directed to a method for designing the system according to embodiments 1-4, comprising the steps of:
s1, determining whether the charging station is in a one-way charging operation mode or a two-way charging and discharging operation mode according to the type of the power plant and the type of the power grid auxiliary service which can be developed by the cooperation of the local power plant and the power grid;
and S2, determining the capacity of the modular rechargeable battery of the charging station according to the generated energy scale of the power plant, the depth and the load of the peak-shaving frequency modulation of the power plant participating in the power grid auxiliary service, and the demand of the pluggable or movable modular rechargeable battery needing to be guaranteed for sale.
Example 6
The present embodiment provides an operation method using the above pluggable or removable charging station system installed in a power plant, where the pluggable or removable charging station responds to a grid auxiliary service by charging or discharging a modular rechargeable battery, and sells a fully charged modular rechargeable battery and recovers the modular rechargeable battery that is used by a user and needs to be charged; the power grid auxiliary service comprises any one or combination of peak shaving, frequency modulation, black start or interruptible power storage load response; the fully charged modular rechargeable battery can be directly unplugged from the charging unit of the pluggable or movable charging station for disassembly and can be directly sold or rented to the outside; the modular rechargeable battery which is used up by the user is recovered to the power plant and installed in the charging unit of the pluggable or removable charging station for recharging.
Example 6
This example describes the connection between the power plant, the charging station and the grid in the systems described in examples 1-4. As shown in fig. 4, the power plant 200 may provide power to the charging station 300 and the power grid 400, respectively, and distribute the power according to peak shaving requirements. Charging station 300 may also provide power back to grid 400 during peak demand.
Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.

Claims (6)

1. A pluggable or removable charging station system for installation in a power generation plant, comprising a central control system (102) for the power generation plant, characterized by comprising a pluggable or removable charging station for installation in the power generation plant; the charging station comprises a charging and discharging control cabinet (7) and a pluggable or movable modularized charging battery (8); the charging and discharging control cabinet (7) is electrically connected with the modularized rechargeable battery (8) and is used for controlling charging and discharging of the modularized rechargeable battery (8); at least one of an outlet bus of a generator (100) of a power plant, a bus of a booster station (101) and a bus of service power is electrically connected to an alternating current input end of the charging and discharging control cabinet (7) through a switch respectively; and the power plant centralized control system (102) is in control connection with each switch and the charging and discharging control cabinet (7).
2. Pluggable or mobile charging station system arranged within a power plant according to claim 1, characterized in that at least one of the outlet bus of the generator (100) of the power plant, the bus of the booster station (101) and the bus of the service power is connected with the respective switch via a transformer.
3. Pluggable or removable charging station system arranged within a power plant according to claim 1, characterized in that the charging and discharging control cabinet (7) comprises an inverter and a charging control unit; the alternating current input end of the inverter is electrically connected to the output end of each switch, and the direct current output end of the inverter is electrically connected to the charging end of the modular rechargeable battery; the charging control unit is connected with the modularized rechargeable battery in a control mode and is used for controlling charging and discharging of the modularized rechargeable battery.
4. Pluggable or removable charging station system provided within a power plant according to claim 1, characterized in that the power plant comprises any one of a thermal power plant, a hydroelectric power plant, a nuclear power plant.
5. Pluggable or mobile charging station system arranged in a power plant according to claim 1, characterized in that the power output of the charging and discharging control cabinet (7) is electrically connected to the bus of the booster station (101) via switches and transformers.
6. The pluggable or removable charging station system disposed within a power plant of claim 1, wherein the pluggable or removable modular charging battery is any one or combination of a lithium ion battery, a nickel metal hydride or nickel cadmium battery, a lead acid battery, a nickel metal hydride battery, a sodium sulfur battery, a sodium ion battery, a nickel zinc battery, a zinc air battery, a super capacitor.
CN201921209881.2U 2019-07-29 2019-07-29 Pluggable or movable charging station system arranged in power plant Active CN210821864U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921209881.2U CN210821864U (en) 2019-07-29 2019-07-29 Pluggable or movable charging station system arranged in power plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921209881.2U CN210821864U (en) 2019-07-29 2019-07-29 Pluggable or movable charging station system arranged in power plant

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Publication Number Publication Date
CN210821864U true CN210821864U (en) 2020-06-23

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