CN111347916A - Charging and energy storage integrated battery replacement station - Google Patents
Charging and energy storage integrated battery replacement station Download PDFInfo
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- CN111347916A CN111347916A CN201811572326.6A CN201811572326A CN111347916A CN 111347916 A CN111347916 A CN 111347916A CN 201811572326 A CN201811572326 A CN 201811572326A CN 111347916 A CN111347916 A CN 111347916A
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- 238000010586 diagram Methods 0.000 description 8
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- 230000001131 transforming effect Effects 0.000 description 3
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- 238000012986 modification Methods 0.000 description 2
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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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Abstract
The invention discloses a charging and energy storage integrated power exchanging station, which comprises: the charging unit is used for receiving alternating current of a power grid and converting the alternating current into first direct current, and the first direct current is used for charging a battery to be charged; the energy storage unit is used for receiving alternating current of a power grid and converting the alternating current into second direct current, and the second direct current is used for charging an energy storage battery; and the control unit is used for receiving a control instruction and setting whether the battery to be charged is charged by the first direct current or not and/or whether the battery to be charged is charged by the energy storage battery or not according to the control instruction. According to the technical scheme, the vehicle to be charged can be charged timely and effectively, the frequency of battery replacement is improved, the condition that the vehicle to be charged is queued in a charging peak time period is relieved, and the user experience is improved.
Description
Technical Field
The invention relates to the field of battery replacement of electric automobiles, in particular to a charging and energy storage integrated battery replacement station.
Background
An electric vehicle (BEV) is a vehicle that runs with wheels driven by a motor using a vehicle-mounted power supply as power. The electric automobile has the advantages of simple structure, energy conservation, environmental protection, low noise and the like, so that the market popularization rate of the electric automobile is higher and higher. With the popularization of electric vehicles, how to charge the electric vehicles in time is an important factor restricting the development of the electric vehicles.
In the prior art, continuation of the running mileage of the electric vehicle is generally realized by adopting a power battery charging or power battery replacement mode. The power battery charging mode is to charge the power battery of the electric automobile by using the charging pile, and the mode usually needs a long time, so that the charging vehicles are easily queued and crowded, and the user experience is seriously influenced. However, with the continuous increase of the specific energy of the battery (i.e., the energy generated by the battery in unit weight or unit volume), the power of the conventional charger is difficult to meet the requirement of the frequency of replacing the battery within several minutes (e.g., 3 to 5 minutes), especially during the peak period of replacing the battery, the load that the power grid can bear is close to the full load, and at this time, it is difficult to provide a large charging current to charge the battery with the exhausted power, so the frequency of replacing the battery in the replacing station is seriously affected, and the electric vehicle users queue seriously; if more backup batteries are prepared in advance, the operation cost of the battery replacement station is increased, and in addition, when the volume of the battery replacement station is limited, the number of the backup batteries is also limited.
How to provide a power swapping station which improves the power swapping frequency on the premise of reducing the operation cost of the power swapping station is an urgent problem to be solved at present.
Disclosure of Invention
The invention aims to overcome the defect that the frequency of battery replacement of a battery replacement station is limited in the prior art, and provides a charging and energy storage integrated battery replacement station.
The invention solves the technical problems through the following technical scheme:
a charging and energy storage integrated charging station, comprising:
the charging unit is used for receiving alternating current of a power grid and converting the alternating current into first direct current, and the first direct current is used for charging a battery to be charged;
the energy storage unit is used for receiving and storing the alternating current of the power grid and converting the alternating current into a second direct current, and the second direct current is used for charging an energy storage battery;
and the control unit is used for receiving a control instruction and setting whether the battery to be charged is charged by the first direct current or not and/or whether the battery to be charged is charged by the energy storage battery or not according to the control instruction.
Preferably, when the power grid runs at full load, the control instruction sets the first direct current and the energy storage battery to charge the battery to be charged; when the power grid is not in full-load operation, the control instruction sets the first direct current to charge the battery to be charged.
Preferably, the charging unit includes:
the input end of the transformation module receives the alternating current of the power grid, the transformation module converts the alternating current into a first direct current, and the first direct current is output by the output end of the transformation module;
a DC bus that receives the first DC power;
the battery compartment is provided with a charging interface, the charging interface is connected with the direct current bus, the battery compartment is used for storing the battery to be charged, and the battery to be charged receives the first direct current.
Preferably, the voltage transformation module includes:
the input end of the standard voltage transformation module receives the alternating current of the power grid, and the output end of the standard voltage transformation module is directly connected with the direct current bus;
the input end of the maneuvering transformation module receives the alternating current of the power grid, the output end of the maneuvering transformation module is connected with the first end of the gating switch, and the second end of the gating switch is connected with the direct current bus.
Preferably, the number of the voltage transformation modules is N1, and different voltage transformation modules output different first direct currents, where N1 is a positive integer.
Preferably, the energy storage unit includes:
the energy storage converter is used for receiving the alternating current of the power grid and outputting the second direct current;
and the direct current adjusting module is used for receiving the second direct current and outputting an adjusted direct current, the current value of the adjusted direct current is smaller than that of the second direct current, and the adjusted direct current is used for charging the energy storage battery.
Preferably, the energy storage battery comprises N2 energy storage sub-batteries connected in parallel, wherein N2 is a positive integer.
Preferably, the input end of the charging unit and the input end of the energy storage unit are connected to the same ac bus, and the ac bus is connected to the power grid.
Preferably, the charging unit is connected to the ac bus through a first isolation switch, and/or the energy storage unit is connected to the ac bus through a second isolation switch, and/or the grid is connected to the ac bus through a third isolation switch.
Preferably, the number of the dc adjustment modules is N3, and different dc adjustment modules output different adjusted dc currents, where N3 is a positive integer.
Preferably, the charging unit and the energy storage unit are installed in the same container in the battery replacement station together.
The positive progress effects of the invention are as follows: according to the technical scheme, the charging unit and the energy storage unit are arranged in the battery replacement station, and the charging strategy of the battery to be charged is adjusted according to different load states of a power grid. Therefore, the vehicles to be charged can be charged timely and effectively, the frequency of battery replacement is improved, the condition that the vehicles to be charged are queued in a charging peak time period is relieved, and the user experience is improved.
Furthermore, according to the technical scheme of the invention, the standard voltage transformation module and the motor-driven voltage transformation module are arranged, so that the power supplied to the direct current bus can be conveniently adjusted, the flexible charging of the vehicle to be charged can be realized, and the flexibility of charging is improved.
Furthermore, in the technical scheme of the invention, the charging unit and the energy storage unit are designed into a group by adopting modules, so that the free combination of the charging unit and the energy storage unit can be realized, the expansion performance is good, and the optimization of the construction cost of the battery replacement station is facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a charging and energy storage integrated charging station according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a charging and energy storage integrated charging station according to embodiment 2 of the present invention.
FIG. 3 is a schematic structural diagram of a first non-limiting embodiment of example 2 of the present invention.
FIG. 4 is a schematic structural diagram of a second non-limiting embodiment of example 2 of the present invention.
FIG. 5 is a schematic structural diagram of a third non-limiting embodiment of example 2 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
A charging and energy storage integrated charging station, as shown in fig. 1, may include:
the charging device comprises a charging unit 1, a charging unit and a control unit, wherein the charging unit 1 is used for receiving alternating current of a power grid W and converting the alternating current into first direct current, and the first direct current is used for charging a battery to be charged;
the energy storage unit 2 is used for receiving and storing the alternating current of the power grid W and converting the alternating current into a second direct current, and the second direct current is used for charging an energy storage battery 4;
and the control unit 3 is used for receiving a control instruction, and setting whether the battery to be charged is charged by the first direct current and/or whether the battery to be charged is charged by the energy storage battery 4 according to the control instruction.
In this embodiment, the charging unit 1 and the energy storage unit 2 may be installed in a same container in the battery replacement station together.
Further, the input of the charging unit 1 and the input of the energy storage unit 2 may be connected to the same ac bus a1, and the ac bus a1 is connected to the grid W.
Specifically, the charging unit 1 may be connected to the ac bus a1 via a first disconnector K1, and/or the energy storage unit 2 may be connected to the ac bus a1 via a second disconnector K2, and/or the grid W may be connected to the ac bus a1 via a third disconnector K3.
Further, the control unit 3 may have a human-machine interface, and a user may select different control instructions or input different control instructions on the human-machine interface according to specific requirements.
Specifically, the control instruction may be input by text or voice, and correspondingly, when the control instruction is input by text, the control unit 3 further includes a text recognition device to recognize the text instruction input by the user; when the control instruction is input by voice, the control unit 3 further includes voice recognition means to recognize a voice instruction of the user.
It is understood that a person skilled in the art may adaptively select an input form of the corresponding control instruction according to specific requirements, for example, a gesture input mode may also be adopted, or the control unit 3 and an App in the mobile terminal may also be bound to each other, the control instruction is input in the App, and the control instruction input in the App by the user is wirelessly transmitted to the control unit 3 through communication between the mobile terminal and the control unit 3. The embodiment of the present invention does not limit the specific input form of the control command.
The control instructions may control a power source of the battery to be charged. Specifically, when the power grid W is running at full load, the control instruction may set the first direct current and the energy storage battery 4 to charge the battery to be charged; when the power grid W is not running at full load, the control instruction may set the battery to be charged by the first direct current.
Further, the charging unit 1 may include: the input end of the transformation module 11 receives the alternating current of the power grid W, the transformation module 11 converts the alternating current into the first direct current, and the first direct current is output by the output end of the transformation module 11; a DC bus M that receives the first DC power; the battery compartment 12, the battery compartment 12 has the interface that charges, the interface that charges with direct current generating line M is connected, the battery compartment 12 is used for depositing the battery of waiting to charge, the battery of waiting to charge receives the first direct current.
Further, the number of the transformer modules 11 may be N1, where N1 is a positive integer. Preferably, the number of the transforming modules 11 is plural, and different transforming modules 11 can output different first direct current.
In particular, the transforming module 11 may be a transformer, which may receive an alternating current (e.g., 380V alternating current) of the power grid W. The capacity of the transformer may be adaptively set according to a specific application. When the charging unit 1 includes a plurality of transformers, the capacities of the transformers may be the same or different.
It should be noted that the specific value of N1 may be set according to the volume of the swapping station and the number of users to be served by the swapping station, and the like, which is not limited in this embodiment of the present invention.
The battery compartment 12 is used for placing a battery to be charged, when the battery is charged, a charging interface in the battery compartment 12 is connected with the battery to be charged, and the battery to be charged receives a first direct current from the direct current bus M through the charging interface.
Further, the energy storage unit 2 may include: the energy storage converter 21 is used for receiving the alternating current of the power grid and outputting the second direct current; and the direct current adjustment module 22 is configured to receive the second direct current and output an adjusted direct current, a current value of the adjusted direct current is smaller than a current value of the second direct current, and the adjusted direct current is used to charge the energy storage battery 4.
In this embodiment, the energy storage converter 21 may be a 100KW energy storage converter. The DC adjusting module 22 may be a DC/DC converting module, and the DC/DC converting module may convert the high voltage DC output by the energy storage converter 21 into a low voltage DC to meet the requirement of charging the energy storage battery 4.
It should be noted that the voltage values of the "high voltage" and the "low voltage" in the embodiment of the present invention are not particularly limited as long as the voltage value of the high voltage is higher than the voltage value of the low voltage.
Further, the number of the dc adjusting modules 22 may be plural, and the capacities of the plural dc adjusting modules 22 may be the same or different. Accordingly, when the capacities of the plurality of dc adjust modules 22 are the same, they can output the same adjusted dc power; when the capacities of the plurality of direct current adjusting modules are different, the direct current adjusting modules can output different adjusted direct currents.
Further, the energy storage battery 4 may include N2 energy storage sub-batteries connected in parallel, where N2 is a positive integer. Furthermore, an energy storage station can be provided for each energy storage sub-cell.
It should be noted that the specific value of N2 may be set according to the volume of the swapping station and the number of users to be served by the swapping station, and the like, which is not limited in this embodiment of the present invention.
According to the technical scheme of the embodiment of the invention, the vehicle to be charged can be effectively charged in time during implementation, the frequency of battery replacement is improved, the condition that the vehicle to be charged is queued in a charging peak time period is relieved, and the user experience is improved. In addition, the charging unit and the energy storage unit can be designed into a group by adopting modules, so that the charging unit and the energy storage unit can be freely combined, the expansion performance is good, and the optimization of the construction cost of the battery replacement station is facilitated.
Example 2
A charging and energy storage integrated battery replacement station, the battery replacement station of this embodiment is a further improvement on the basis of embodiment 1, as shown in fig. 2, a voltage transformation module of the battery replacement station may include:
the input end of the standard transformation module 111 receives the alternating current of the power grid W, and the output end of the standard transformation module 111 is directly connected with the direct current bus M;
the input end of the motorized voltage transformation module 112 receives the alternating current of the power grid W, the output end of the motorized voltage transformation module 112 is connected with the first end of a gating switch S, and the second end of the gating switch S is connected with the direct current bus M.
Further, the gating switch S may include a plurality of gating subswitches, and the motorized voltage transformation module 112 may be connected to different dc buses M through different gating subswitches.
Referring to FIG. 3, FIG. 3 is a schematic diagram of a first non-limiting embodiment of example 2. In this embodiment, when the power grid W is not running at full load, the control command may set the first direct current to charge the battery to be charged.
The four direct current buses M1, M2, M3 and M4 are arranged, the total number of the four direct current buses is 8, the four direct current buses are sequentially a first transformation module, a second transformation module, a third transformation module, … … and an eighth transformation module, and the 8 transformation modules form a transformation module group. The first transformation module, the second transformation module, the third transformation module and the fourth transformation module are standard transformation modules which are respectively and correspondingly connected to corresponding direct current buses, and the fifth transformation module, the sixth transformation module, the seventh transformation module and the eighth transformation module are motorized transformation modules which are respectively connected to the direct current buses M1, M2, M3 and M4 through gating switches S1, S2, S3 and S4; the first battery compartment, the second battery compartment, the third battery compartment and the fourth battery compartment are respectively provided with a battery to be charged.
At this time, the first disconnector K1 and the third disconnector K3 are closed, the second disconnector K2 is opened, the power grid W supplies power to the illustrated plurality of voltage transformation modules through the ac bus a1, and each dc bus is directly connected to a respective corresponding standard voltage transformation module.
If the capacities of the batteries in the first battery compartment and the third battery compartment are larger and the batteries need to be charged more quickly, the motorized voltage transformation module can be put into use. In specific implementation, the fifth transformation module supplies power to the first dc bus M1 through the sub-switch in the gating switch K1, and the sixth transformation module supplies power to the third dc bus M3 through the sub-switch in the gating switch K2.
Referring to FIG. 4, FIG. 4 is a schematic diagram of a second non-limiting embodiment of example 2. The specific implementation mode is applied to a scene of full-load operation of a power grid W, and a user sends a control instruction which can set that the battery to be charged is charged by a first direct current and the energy storage battery.
At this time, the first isolating switch K1, the second isolating switch K2 and the third isolating switch K3 are closed, the power grid W supplies power to the multiple voltage transformation modules through the alternating current bus a1, direct current output by the multiple groups of energy storage batteries is converted into alternating current through the direct current adjustment module and the energy storage converter and then is connected to the alternating current bus a1, and electric energy supplied to the alternating current bus a1 supplies power to the multiple voltage transformation modules through the first isolating switch K1.
In this scenario, if the capacity of the battery to be charged in the second battery compartment is large and rapid charging is required, the motorized voltage transformation module may be put into use, and in specific implementation, the fifth voltage transformation module supplies power to the second dc bus M2 through the sub-switch in the gating switch S1, and the eighth voltage transformation module supplies power to the second dc bus M2 through the sub-switch in the gating switch S4.
Referring to FIG. 5, FIG. 5 is a schematic diagram of a third non-limiting embodiment of example 2. The specific implementation mode is applied to a scene that the rechargeable battery is not required to be charged and only the energy storage battery is charged, and the scene is usually in the middle of the night electricity consumption valley period, can only use lower electricity price to charge the energy storage battery and is prepared for charging the rechargeable battery in the daytime at the peak electricity consumption period.
In this scenario, the first isolating switch K1 is opened, the second isolating switch K2 and the third isolating switch K3 are closed, the power grid W supplies power to the ac bus a1 through the third isolating switch K3, and the power received by the ac bus a1 is supplied to the plurality of energy storage batteries through the energy storage converter and the plurality of dc adjusting modules.
It should be noted that the above three embodiments are only exemplary to describe the way in which the respective isolating switch, the gating switch and the power transformation module cooperate with each other. Wherein, the opening and closing of each isolator and each gating switch can be set according to specific demands, and the quantity of vary voltage module, battery compartment, direct current adjustment module, energy storage battery also can increase or reduce according to the specific application scene, for example: the number of the transformation modules may be set to 16 (which may include 10 standard transformation modules and 6 power transformation modules), the number of the direct current adjustment modules may be set to 8, and each energy storage battery may be set to be composed of 4 energy storage sub-batteries connected in parallel, which is not limited in this embodiment.
According to the technical scheme, the standard voltage transformation module and the motor-driven voltage transformation module are arranged, so that the power supplied to the direct-current bus can be conveniently adjusted, flexible charging of a vehicle to be charged can be achieved, the number and the combination mode of the modules can be flexibly adjusted according to needs, and the flexibility of the design of the power conversion station is effectively improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (11)
1. The utility model provides a power station is traded with energy storage integral type to charging, its characterized in that trades the power station and includes:
the charging unit is used for receiving alternating current of a power grid and converting the alternating current into first direct current, and the first direct current is used for charging a battery to be charged;
the energy storage unit is used for receiving and storing the alternating current of the power grid and converting the alternating current into a second direct current, and the second direct current is used for charging an energy storage battery;
and the control unit is used for receiving a control instruction and setting whether the battery to be charged is charged by the first direct current or not and/or whether the battery to be charged is charged by the energy storage battery or not according to the control instruction.
2. The charging and energy storage integrated power station as claimed in claim 1,
when the power grid runs at full load, the control instruction sets that the battery to be charged is charged by the first direct current and the energy storage battery;
when the power grid is not in full-load operation, the control instruction sets the first direct current to charge the battery to be charged.
3. The integrated charging and energy storage charging station as claimed in claim 1, wherein the charging unit comprises:
the input end of the transformation module receives the alternating current of the power grid, the transformation module converts the alternating current into a first direct current, and the first direct current is output by the output end of the transformation module;
a DC bus that receives the first DC power;
the battery compartment is provided with a charging interface, the charging interface is connected with the direct current bus, the battery compartment is used for storing the battery to be charged, and the battery to be charged receives the first direct current.
4. The integrated charging and energy storage charging station as claimed in claim 3, wherein the voltage transformation module comprises:
the input end of the standard voltage transformation module receives the alternating current of the power grid, and the output end of the standard voltage transformation module is directly connected with the direct current bus;
the input end of the maneuvering transformation module receives the alternating current of the power grid, the output end of the maneuvering transformation module is connected with the first end of the gating switch, and the second end of the gating switch is connected with the direct current bus.
5. The charging and energy storage integrated power conversion station as claimed in claim 3, wherein the number of the voltage transformation modules is N1, different voltage transformation modules output different first direct currents, and N1 is a positive integer.
6. The integrated charging and energy storage charging station as claimed in claim 1, wherein the energy storage unit comprises:
the energy storage converter is used for receiving the alternating current of the power grid and outputting the second direct current;
and the direct current adjusting module is used for receiving the second direct current and outputting an adjusted direct current, the current value of the adjusted direct current is smaller than that of the second direct current, and the adjusted direct current is used for charging the energy storage battery.
7. The integrated charging and energy storage charging station as claimed in claim 6, wherein the energy storage battery comprises N2 energy storage sub-batteries connected in parallel, wherein N2 is a positive integer.
8. The integrated charging and energy storage charging station as claimed in claim 1, wherein the input end of the charging unit and the input end of the energy storage unit are connected to the same AC bus, and the AC bus is connected to the power grid.
9. The integrated charging and energy storage charging station as claimed in claim 8, wherein the charging unit is connected with the alternating current bus through a first isolating switch, and/or the energy storage unit is connected with the alternating current bus through a second isolating switch, and/or the power grid is connected with the alternating current bus through a third isolating switch.
10. The charging and energy storage integrated power conversion station as claimed in claim 6, wherein the number of the direct current regulation modules is N3, different direct current regulation modules output different regulated direct currents, and N3 is a positive integer.
11. The charging and energy storage integrated charging station as claimed in claim 1, wherein the charging unit and the energy storage unit are mounted together in a same container in the charging station.
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| CN201811572326.6A CN111347916A (en) | 2018-12-21 | 2018-12-21 | Charging and energy storage integrated battery replacement station |
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| CN201811572326.6A CN111347916A (en) | 2018-12-21 | 2018-12-21 | Charging and energy storage integrated battery replacement station |
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| CN113422419A (en) * | 2021-08-24 | 2021-09-21 | 中国华能集团清洁能源技术研究院有限公司 | Battery changing station |
| CN113422419B (en) * | 2021-08-24 | 2022-02-08 | 中国华能集团清洁能源技术研究院有限公司 | Battery changing station |
| CN114123426A (en) * | 2021-12-09 | 2022-03-01 | 浙江吉智新能源汽车科技有限公司 | Charging system of battery replacement station |
| CN114123426B (en) * | 2021-12-09 | 2023-12-19 | 浙江吉智新能源汽车科技有限公司 | Charging system of power exchange station |
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