CN114123426A - Charging system of battery replacement station - Google Patents

Charging system of battery replacement station Download PDF

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Publication number
CN114123426A
CN114123426A CN202111497974.1A CN202111497974A CN114123426A CN 114123426 A CN114123426 A CN 114123426A CN 202111497974 A CN202111497974 A CN 202111497974A CN 114123426 A CN114123426 A CN 114123426A
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CN
China
Prior art keywords
charging
battery
charged
parallel
voltage
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Granted
Application number
CN202111497974.1A
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Chinese (zh)
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CN114123426B (en
Inventor
董继维
徐斌
叶华春
马增
刘宏健
陈昌鑫
李博鹏
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Zhejiang Geely Holding Group Co Ltd
Zhejiang Jizhi New Energy Automobile Technology Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Zhejiang Jizhi New Energy Automobile Technology Co Ltd
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Priority to CN202111497974.1A priority Critical patent/CN114123426B/en
Publication of CN114123426A publication Critical patent/CN114123426A/en
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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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • 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
    • B60L53/80—Exchanging energy storage elements, e.g. removable batteries
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H02J7/007184—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a charging system of a battery replacement station, and relates to the technical field of vehicle battery replacement. The charging system comprises a parallel charging unit, a plurality of charging bins and a controller, wherein the input end of each charging bin is electrically connected with the output end of the parallel charging unit, the output end of each charging bin is electrically connected with a battery to be charged, and a contactor capable of controlling the on-off of a circuit of the charging bin is arranged between the input end and the output end of each charging bin. The controller is connected with the parallel charging unit and the plurality of charging bins and is used for acquiring the initial charging voltage of the battery to be charged according to the charging request of the battery to be charged in the charging bins and controlling the contactor in the charging bin where the battery to be charged is located to be closed when the initial charging voltage is equal to the output voltage of the parallel charging unit. According to the technical scheme, the parallel charging units are adopted, so that all the batteries to be charged can be continuously charged when a single charger fails, and the charging reliability of the battery replacement station is improved.

Description

Charging system of battery replacement station
Technical Field
The invention relates to the technical field of vehicle battery replacement, in particular to a charging system of a battery replacement station.
Background
The vehicle battery replacement is rapidly developed as a new energy supplementing type at present, and has the advantages of short energy supplementing time, reduction of electricity consumption cost, vehicle-electricity separation, reduction of vehicle purchasing cost and the like. At present, the charging of batteries in a battery replacement station is similar to the charging mode of a vehicle, namely, one charger charges one power battery, and the chargers correspond to charging positions of the power batteries one by one. In the charging mode, each charging bin is required to be provided with one charger, and the charging power of the chargers needs to meet the peak charging power of the batteries, so that the number of chargers of the whole power changing station and the power of a single charger are large, and the cost and the volume of the whole power changing station are increased. If a certain charger fails, the charging bin corresponding to the charger cannot be charged, and the charging reliability of the whole station is reduced.
Disclosure of Invention
The invention aims to provide a charging system for a battery replacement station, and solves the technical problem that in the prior art, the charging reliability of a vehicle battery replacement station is low.
According to an object of the present invention, there is provided a charging system for a charging station, including:
a charging unit is connected in parallel;
the input end of each charging bin is electrically connected with the output end of the parallel charging unit, the output end of each charging bin is electrically connected with a battery to be charged, and a contactor capable of controlling the on-off of a circuit of the charging bin is arranged between the input end and the output end of each charging bin;
and the controller is connected with the parallel charging unit and the plurality of charging bins, and is used for acquiring the initial charging voltage of the battery to be charged according to the charging request of the battery to be charged in the charging bins and controlling the contactor in the charging bin where the battery to be charged is located to be closed when the initial charging voltage is equal to the output voltage of the parallel charging unit.
Optionally, the controller is further configured to control the output voltage of the parallel charging unit to increase to a first target voltage equal to the initial charging voltage when the initial charging voltage is greater than the output voltage of the parallel charging unit, and then control the contactor in the charging bay where the battery to be charged is located to close.
Optionally, the controller is further configured to obtain an initial charging voltage of the battery to be charged according to the charging request of the battery to be charged in the charging bin, control the output voltage of the parallel charging unit to rise to a second target voltage equal to the initial charging voltage, and then control the contactor in the charging bin where the battery to be charged is located to be closed.
Optionally, the controller is further configured to obtain initial charging voltages corresponding to the multiple batteries to be charged according to charging requests of the multiple batteries to be charged corresponding to the multiple charging bins, and control the output voltage of the parallel charging unit to gradually increase from a lowest initial charging voltage of all the initial charging voltages of the multiple batteries to be charged to a highest initial charging voltage of all the initial charging voltages;
and the contactor corresponding to any one charging bin is configured to be closed when the output voltage of the parallel charging unit is equal to the initial charging voltage of the battery to be charged on the charging bin.
Optionally, the controller is further configured to obtain initial charging voltages corresponding to the multiple batteries to be charged according to charging requests of the multiple batteries to be charged corresponding to the multiple charging bays, and control the contactors of the charging bays corresponding to the batteries to be charged to be always in an open state when the initial charging voltages are lower than the current output voltage of the parallel charging unit, until the output voltage of the parallel charging unit is reduced to be equal to the initial charging voltage of the batteries to be charged, and control the corresponding contactors to be closed.
Optionally, the parallel charging set comprises a plurality of chargers connected in parallel.
Optionally, the controller is further configured to control the contactor of the charging bin corresponding to the charging battery to open when a full charge or a charging failure of a plurality of charging batteries in the plurality of charging bins is detected.
Optionally, the controller is further configured to control any one of the chargers to be separated from the parallel charging unit when the controller detects that the charger is out of order.
Optionally, the powers of the chargers are the same or different.
Optionally, the number of the plurality of chargers is the same as the number of the plurality of charging bays.
The charging system comprises a parallel charging unit, a plurality of charging bins and a controller, wherein the input end of each charging bin is electrically connected with the output end of the parallel charging unit, the output end of each charging bin is electrically connected with a battery to be charged, and a contactor capable of controlling the on-off of a circuit of the charging bin is arranged between the input end and the output end of each charging bin. The controller is connected with the parallel charging unit and the plurality of charging bins and is used for acquiring the initial charging voltage of the battery to be charged according to the charging request of the battery to be charged in the charging bins and controlling the contactor in the charging bin where the battery to be charged is located to be closed when the initial charging voltage is equal to the output voltage of the parallel charging unit. According to the technical scheme, the parallel charging units are adopted, so that all the batteries to be charged can be continuously charged when a single charger fails, and the charging reliability of the battery replacement station is improved. And above-mentioned technical scheme can compare its initial charging voltage and the output voltage of parallelly connected charging unit when waiting to charge the charging request of battery, only when the two are equal can control contactor closed to can avoid the output voltage of parallelly connected charging unit and the condition emergence that the battery that waits to charge mismatching and cause charging fault.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic block diagram of a charging system of a charging station according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a charging method of a charging station according to an embodiment of the invention.
Reference numerals:
100-a power conversion station charging system, 10-a parallel charging unit, 20-a charging bin, 30-a power battery, 40-a contactor and 50-a controller.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Fig. 1 is a schematic block diagram of a charging system 100 of a charging station according to an embodiment of the present invention. As shown in fig. 1, in a specific embodiment, the charging system 100 for a charging station includes a parallel charging unit 10, a plurality of charging bays 20 and a controller 50, wherein an input end of each charging bay 20 is electrically connected to an output end of the parallel charging unit 10, an output end of each charging bay 20 is electrically connected to a battery to be charged, and a contactor 40 capable of controlling on/off of a circuit of the charging bay 20 is arranged between the input end and the output end of each charging bay 20. The controller 50 is connected to the parallel charging unit 10 and the plurality of charging bays 20, and is configured to obtain an initial charging voltage of the battery to be charged according to a charging request of the battery to be charged in the charging bay 20, and control the contactor 40 in the charging bay 20 where the battery to be charged is located to be closed when the initial charging voltage is equal to the output voltage of the parallel charging unit 10. Here, the battery to be charged refers to the power battery 30 to be charged, and the power battery 30 is mainly used for energy storage, and the electric energy of the power grid is stored in the battery through the charger 11. The charging bin 20 is mainly used for placing the power battery 30 to be charged, and when the power battery 30 is placed in the charging bin 20, the charging bin 20 can automatically obtain the charging requirement of the power battery 30, which includes information such as the initial charging voltage and the remaining power of the power battery 30. The contactor 40 located in the charging bin 20 is used for controlling the connection of the power battery 30 and the parallel charging unit 10, one end of the contactor 40 is connected with the power battery 30 to be charged, and the other end of the contactor 40 is connected with the parallel charging unit 10. The parallel charging set 10 is mainly used for converting a grid alternating current into a direct current with controllable voltage to charge the power battery 30, and the parallel charging set 10 comprises a plurality of chargers 11 connected in parallel. The parallel charging unit 10 is equivalent to connecting all the outputs of the chargers 11 in parallel to form a direct current bus. The controller 50 is mainly used for controlling the coordinated charging process, including obtaining the state of the power battery 30 and the charging request, controlling the on/off of the contactor 40 in the charging bin 20, obtaining the working state of the chargers 11 in the parallel charging unit 10, controlling the output voltage of the parallel charging unit 10 and the output voltages of all the chargers 11 in the parallel charging unit 10, and the like.
In the embodiment, the parallel charging unit 10 is adopted, so that all the batteries to be charged can be continuously charged when a single charger 11 fails, and the charging reliability of the battery replacement station is improved. In addition, the number of chargers 11 of the parallel charging units 10 in the battery charging station can be reduced, the power of a single charger 11 is reduced, and the cost and the volume of the charging system 100 of the battery charging station are further reduced. In addition, according to the technical scheme, when the charging request of the battery to be charged is made, the initial charging voltage of the battery to be charged is compared with the output voltage of the parallel charging unit 10, and the contactor 40 is controlled to be closed only when the initial charging voltage and the output voltage of the battery to be charged are equal to each other, so that the situation that the output voltage of the parallel charging unit 10 is not matched with the battery to be charged to cause a charging fault can be avoided.
In this embodiment, the controller 50 is further configured to control the output voltage of the parallel charging unit 10 to increase to a first target voltage equal to the initial charging voltage when the initial charging voltage is greater than the output voltage of the parallel charging unit 10, and then control the contactor 40 in the charging bin 20 where the battery to be charged is located to close. That is, the corresponding contactor 40 can be controlled to be closed only when the output voltage of the parallel charging group is equal to the initial charging voltage of the battery to be charged. It can be understood that when the parallel charging unit 10 is charging other batteries, the controller 50 receives a charging request of another battery to be charged, determines whether the initial charging voltage of the battery to be charged is greater than the output voltage of the parallel charging unit 10 at the time, and controls the output voltage of the parallel charging unit 10 to increase if the initial charging voltage of the battery to be charged is greater than the output voltage of the parallel charging unit 10 at the time, so as to charge the battery to be charged. In addition, if the battery to be charged is equal to the output voltage of the parallel charging unit 10, the corresponding contactor 40 is directly controlled to be closed, so that the battery to be charged can be directly charged. Here, the control of the output voltage rise of the parallel charging unit 10 is required to satisfy a preset condition to ensure that the charging current to the power battery 30 being charged does not exceed the maximum charging current allowed by the charging battery.
In this embodiment, the controller 50 is further configured to obtain an initial charging voltage of the battery to be charged according to a charging request of the battery to be charged in the charging bay 20, control the output voltage of the parallel charging unit 10 to rise to a second target voltage equal to the initial charging voltage, and then control the contactor 40 in the charging bay 20 where the battery to be charged is located to close. It is understood that the controller 50 directly controls the output voltage of the parallel charging unit 10 to rise when receiving a charging request of a battery to be charged when the parallel charging unit 10 is in an idle state, that is, when any one of the rechargeable batteries is not charged, without comparing the initial charging voltage of the battery to be charged with the output voltage of the parallel charging unit 10.
In this embodiment, the controller 50 is further configured to obtain initial charging voltages corresponding to a plurality of batteries to be charged according to charging requests of a plurality of batteries to be charged corresponding to the plurality of charging bays 20, and control the output voltage of the parallel charging set 10 to gradually increase from a lowest initial charging voltage to a highest initial charging voltage among all initial charging voltages of the plurality of batteries to be charged. The contactor 40 corresponding to any one charging bay 20 is configured to close when the output voltage of the parallel charging assembly 10 is equal to the initial charging voltage of the battery to be charged on that charging bay 20. It can be understood that when the controller 50 receives the charging requests of the plurality of batteries to be charged simultaneously, the output voltage of the parallel charging unit 10 is controlled to be equal to the lowest initial charging voltage of the plurality of batteries to be charged, and at this time, the contactor 40 corresponding to the battery to be charged with the lowest initial charging voltage is controlled to be closed, so as to charge the battery to be charged. And then controlling the output voltage of the parallel charging unit 10 to gradually increase, and when the output voltage sequentially increases to be equal to the voltages of other batteries to be charged, controlling the corresponding contactor 40 to be closed so as to charge the batteries to be charged at the same time. The process is connected with the parallel charging unit 10 for charging according to the initial charging voltage of a plurality of batteries to be charged from small to large.
In this embodiment, the controller 50 is further configured to obtain an initial charging voltage corresponding to a plurality of batteries to be charged in the plurality of charging bays 20 according to charging requests of the plurality of batteries to be charged corresponding to the plurality of batteries to be charged, and control the contactor 40 of the charging bay 20 corresponding to the battery to be charged to be in an open state when the initial charging voltage is lower than the current output voltage of the parallel charging set 10 until the output voltage of the parallel charging set 10 decreases to be equal to the initial charging voltage of the battery to be charged, and control the corresponding contactor 40 to close. It can be understood that when the parallel charging unit 10 is charging other batteries, the controller 50 receives a charging request of another battery to be charged, and determines whether the initial charging voltage of the battery to be charged is greater than or equal to the output voltage of the parallel charging unit 10 at the moment, and if the initial charging voltage of the battery to be charged is less than the output voltage of the parallel charging unit 10 at the moment, the battery to be charged is kept in a waiting state, and only when the parallel charging unit 10 completes the charging process of this round, that is, completes the charging of all the batteries being charged, the output voltage of the parallel charging unit 10 is controlled to be reduced to be consistent with the initial charging voltage of the battery to be charged, so as to charge the battery.
In this embodiment, the controller 50 is further configured to control the contactor 40 of the charging bin 20 corresponding to the charging battery to open when a charging failure or a full charge of the charging batteries in the charging bins 20 is detected. That is, the controller 50 constantly monitors whether the rechargeable battery is fully charged and whether a charging failure occurs while the power battery 30 is being charged, and controls the contactor 40 to be opened if any of the above conditions is satisfied. Here, when the power battery 30 is fully charged, that is, when the voltage reaches the preset voltage, the corresponding charging bin 20 sends a charging completion message to the controller 50. When the power battery 30 fails to charge, the corresponding charging bin 20 also sends charging failure information to the controller 50.
In this embodiment, the controller 50 is also configured to control any one of the chargers 11 to disengage from the parallel charging set 10 when a fault is detected in the charger 11. It can be understood that the controller 50 monitors the operating states of all the chargers 11 as long as the parallel charging unit 10 is in the operating state, and controls the chargers 11 to be turned off as long as a fault occurs in the chargers 11, so as to disconnect the output, thereby avoiding affecting the normal charging of the power batteries 30 being charged. That is, in this embodiment, even if the charger 11 fails, the charging of the rechargeable battery is not affected. In addition, in the charging process, the controller 50 may also determine the working states of the plurality of chargers 11 in the parallel charging unit 10, and when the output power of a certain charger 11 decreases due to an excessive output power or an excessive temperature, the controller 50 may control the charging power of the charger 11 to decrease, so as to reduce overload, thereby reducing the risk of shortening the service life of the charger 11. During the charging process, the controller 50 also equalizes the output powers of all the chargers 11 in the parallel charging group according to the operating states of the plurality of chargers 11. Here, the power of the plurality of chargers 11 is the same or different. Since the plurality of chargers 11 are connected in parallel in this embodiment, the power of the chargers 11 can be appropriately reduced, the stand-alone capacity of the chargers 11 can be further reduced in design, and in addition, the load rate is lower when a single charger 11 is in a working state, so that the service life of the chargers 11 and the charging reliability are increased.
In this embodiment, the number of the plurality of chargers 11 is the same as the number of the plurality of charging bays 20. In other embodiments, the number of the plurality of chargers 11 may be set to be different from the number of the plurality of charging bays 20.
Fig. 2 is a schematic flow chart of a charging method of a charging station according to an embodiment of the invention. As shown in fig. 2, in a specific embodiment, the charging method of the battery swapping station specifically includes the following steps:
step S100, acquiring initial charging voltage of a battery to be charged according to a charging request of the battery to be charged in the charging bin 20; here, the charging request of the battery to be charged is sent from the charging bin 20 to the controller 50.
Step S200, comparing the initial charging voltage of the battery to be charged with the output voltage of the parallel charging unit 10;
step S300, when the initial charging voltage of the battery to be charged is equal to the output voltage of the parallel charging unit 10, controlling the corresponding contactor 40 to be closed; when the initial charging voltage of the battery to be charged is greater than the output voltage of the parallel charging unit 10, controlling the output voltage of the parallel charging unit 10 to rise to a first target voltage equal to the initial charging voltage, and then controlling the corresponding contactor 40 to be closed; and when the initial charging voltage of the battery to be charged is lower than the current output voltage of the parallel charging unit 10, controlling the corresponding contactor 40 to be in an open state all the time until the output voltage of the parallel charging unit is reduced to be equal to the initial charging voltage of the battery to be charged, and controlling the corresponding contactor 40 to be closed.
This embodiment is equivalent to that when the initial charging voltage of the battery to be charged is consistent with the output voltage of the parallel charging unit 10, the corresponding contactor 40 can be directly closed, and charging can be directly started. When the initial charging voltage of the battery to be charged is greater than the output voltage of the parallel charging unit 10, the corresponding contactor 40 may be closed until the output voltage of the parallel charging unit 10 gradually increases to be equal to the initial charging voltage, so that charging is started. When the initial charging voltage of the battery to be charged is less than the output voltage of the parallel charging set 10, the charging in this round cannot be performed, and the corresponding contactor 40 can be closed to start charging only after the parallel charging set 10 completes the charging of all the power batteries 30 currently being charged, that is, until the next round of charging is performed, and the output voltage of the parallel charging set 10 is reduced to be equal to the output voltage.
At present, the charging station adopts a technical scheme that one charging bin 20 corresponds to one charger 11, the number of the chargers 11 is equal to that of the charging bins 20, the capacity of each charger 11 can meet the requirement of the peak charging power of the battery, and the working condition that all power batteries 30 in the charging station are charged simultaneously and are at the peak charging power at the same time rarely occurs, so that resource waste is caused. In the embodiment, the charging direct current buses are formed by connecting the plurality of chargers 11 in parallel, the charging bin 20 is not in one-to-one correspondence with the chargers 11, the chargers 11 can be selected according to the charging peak power of the whole charging station, the number of the chargers 11 can be reduced, and the capacity of a single charger 11 can be reduced.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A charging system for a charging station, comprising:
a charging unit is connected in parallel;
the input end of each charging bin is electrically connected with the output end of the parallel charging unit, the output end of each charging bin is electrically connected with a battery to be charged, and a contactor capable of controlling the on-off of a circuit of the charging bin is arranged between the input end and the output end of each charging bin;
and the controller is connected with the parallel charging unit and the plurality of charging bins, and is used for acquiring the initial charging voltage of the battery to be charged according to the charging request of the battery to be charged in the charging bins and controlling the contactor in the charging bin where the battery to be charged is located to be closed when the initial charging voltage is equal to the output voltage of the parallel charging unit.
2. The charging system for a battery swapping station as claimed in claim 1, wherein the controller is further configured to control the output voltage of the parallel charging unit to increase to a first target voltage equal to the initial charging voltage when the initial charging voltage is greater than the output voltage of the parallel charging unit, and then control the contactor in the charging bay where the battery to be charged is located to close.
3. The charging system for a battery swapping station according to claim 1, wherein the controller is further configured to obtain an initial charging voltage of the battery to be charged according to the charging request of the battery to be charged in the charging bay, control the output voltage of the parallel charging unit to rise to a second target voltage equal to the initial charging voltage, and then control a contactor in the charging bay where the battery to be charged is located to close.
4. The charging system for a battery swapping station according to claim 1, wherein the controller is further configured to obtain initial charging voltages corresponding to a plurality of batteries to be charged according to charging requests of the plurality of batteries to be charged corresponding to the plurality of charging bays, and control the output voltage of the parallel charging set to gradually increase from a lowest initial charging voltage to a highest initial charging voltage among all the initial charging voltages of the plurality of batteries to be charged;
and the contactor corresponding to any one charging bin is configured to be closed when the output voltage of the parallel charging unit is equal to the initial charging voltage of the battery to be charged on the charging bin.
5. The charging system for a battery swapping station according to claim 1, wherein the controller is further configured to obtain initial charging voltages corresponding to a plurality of batteries to be charged in the plurality of charging bays according to charging requests of the plurality of batteries to be charged corresponding to the plurality of charging bays, and control the contactor of the charging bay corresponding to the battery to be charged to be in an open state when the initial charging voltage is lower than the current output voltage of the parallel charging unit until the output voltage of the parallel charging unit is reduced to be equal to the initial charging voltage of the battery to be charged, and control the corresponding contactor to be closed.
6. The charging system for a charging station according to any one of claims 1 to 5, wherein the parallel charging unit comprises a plurality of chargers connected in parallel.
7. The charging system for a charging station according to any one of claims 1 to 5, wherein the controller is further configured to control the contactor of the charging bin corresponding to the charging battery to open when a charging fault or a full charge of the charging battery corresponding to the charging bin is detected.
8. The charging system for a battery charging station according to claim 6, wherein the controller is further configured to control any one of the plurality of chargers to be detached from the parallel charging set when the charger is detected to be out of order.
9. The charging system for a battery replacement station according to claim 6,
the power of the chargers is the same or different.
10. The charging system for a battery replacement station according to claim 6,
the number of the chargers is the same as that of the charging bins.
CN202111497974.1A 2021-12-09 2021-12-09 Charging system of power exchange station Active CN114123426B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170124851A (en) * 2016-05-03 2017-11-13 월드탑텍(주) High-speed battery charger for vehicles using distributed power conversion
CN111347916A (en) * 2018-12-21 2020-06-30 奥动新能源汽车科技有限公司 Charging and energy storage integrated battery replacement station
CN112498167A (en) * 2020-12-10 2021-03-16 国网智慧能源交通技术创新中心(苏州)有限公司 Charging method and charging system for battery replacing box

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170124851A (en) * 2016-05-03 2017-11-13 월드탑텍(주) High-speed battery charger for vehicles using distributed power conversion
CN111347916A (en) * 2018-12-21 2020-06-30 奥动新能源汽车科技有限公司 Charging and energy storage integrated battery replacement station
CN112498167A (en) * 2020-12-10 2021-03-16 国网智慧能源交通技术创新中心(苏州)有限公司 Charging method and charging system for battery replacing box

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