CN113422419B

CN113422419B - Battery changing station

Info

Publication number: CN113422419B
Application number: CN202110971552.7A
Authority: CN
Inventors: 刘大为; 姚帅; 马满堂; 李�昊; 朱连峻; 周科; 刘明义; 裴杰; 曹传钊; 朱勇; 曹曦; 徐若晨
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Clean Energy Research Institute
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-02-08
Anticipated expiration: 2041-08-24
Also published as: WO2023025040A1; CN113422419A

Abstract

The invention discloses a power swapping station. Should trade the power station and include: the system comprises a new energy power generation device, a power grid access device, an inverter, a battery replacement battery and a controller; the new energy power generation device is used for converting new energy into first alternating current electric energy of a first voltage level and outputting the first alternating current electric energy; the power grid access device is used for receiving second alternating current electric energy of a second voltage grade from a power grid and outputting the second alternating current electric energy; the controller is used for sending a charging instruction to the inverter, the inverter can convert at least one of the first alternating current electric energy and the second alternating current electric energy into first direct current electric energy of a third voltage level based on the charging instruction, and the battery replacement battery is charged by using the first direct current electric energy. From this, trade the power station and include new forms of energy power generation facility and electric wire netting access device, can combine the use with the alternating current electric energy that new forms of energy power generation facility and electric wire netting produced respectively, the charge mode is more nimble, has improved the stability and the reliability that trade the power supply of power station, can satisfy user's power consumption demand.

Description

Battery changing station

Technical Field

The invention relates to the technical field of charging, in particular to a power conversion station.

Background

At present, electric energy is widely applied to daily life of people, for example, a sweeping robot, an electric kettle and an induction cooker in household appliances have the advantages of convenience and rapidness, the housework burden of people can be greatly reduced, and the pollution of an electric automobile on the environment in traffic travel is small. In the prior art, the electric equipment can be charged through the battery replacing station, however, the charging mode of the existing battery replacing station is not flexible enough, the stability and reliability of power supply of the battery replacing station are low, and the power demand of a user cannot be met.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above.

Therefore, a first object of the present invention is to provide a battery replacement station, which includes a new energy power generation device and a power grid access device, and can combine the ac power generated by the new energy power generation device and the power grid, so that the charging mode is more flexible, the stability and reliability of power supply of the battery replacement station are improved, and the power demand of the user can be met.

An embodiment of a first aspect of the present invention provides a power swapping station, including: the system comprises a new energy power generation device, a power grid access device, an inverter, a battery replacement battery and a controller; the inverter is electrically connected with the new energy power generation device, the power grid access device and the battery replacement battery respectively; the new energy power generation device is used for converting new energy into first alternating current electric energy of a first voltage level and outputting the first alternating current electric energy; the power grid access device is used for receiving second alternating current electric energy of a second voltage grade from a power grid and outputting the second alternating current electric energy; the controller is used for sending a charging instruction to the inverter, and the inverter can convert at least one of the first alternating current electric energy and the second alternating current electric energy into first direct current electric energy of a third voltage level based on the charging instruction and charge the battery with the first direct current electric energy.

According to the power exchanging station provided by the embodiment of the invention, the power exchanging station comprises the new energy power generation device and the power grid access device, and the alternating current electric energy generated by the new energy power generation device and the power grid can be combined for use, so that the charging mode is more flexible, the power supply stability and reliability of the power exchanging station are improved, and the power consumption requirement of a user can be met.

In addition, the swapping station proposed according to the above embodiment of the present invention may further have the following additional technical features:

in an embodiment of the present invention, the controller is further configured to detect whether a preset power grid access condition is currently met, and send an access instruction to the power grid access device when the preset power grid access condition is currently met, where the power grid access device may establish an electrical connection with the power grid based on the access instruction; or the controller detects that the power grid access condition is not met currently, and sends a disconnection instruction to the power grid access device, and the power grid access device can disconnect the electric connection between the power grid access device and the power grid based on the disconnection instruction.

In one embodiment of the invention, the grid access condition comprises at least one of: the first alternating current electric energy is smaller than the electric energy required by the power exchanging station; and the target parameters of the power grid are in a preset target value range.

In an embodiment of the present invention, the controller is further configured to detect whether a preset charging condition is currently satisfied, and send the charging instruction to the inverter when detecting that the preset charging condition is currently satisfied.

In an embodiment of the present invention, the swapping station further includes: the cloud server is used for detecting whether preset charging conditions are met or not at present, when the charging conditions are met at present, the cloud server sends the charging instruction to the controller, and the controller feeds the charging instruction back to the inverter.

In one embodiment of the invention, the charging conditions comprise at least one of: the method comprises the following steps that the residual electric quantity of any battery replacing battery in the battery replacing station is smaller than a first preset threshold value; the accumulated waiting time of any equipment to be charged in the charging station reaches a second preset threshold; the remaining waiting time of any equipment to be charged in the charging station is less than a third preset threshold; the first alternating current electric energy is larger than the required electric energy of the power conversion station, and the difference value between the first alternating current electric energy and the required electric energy is larger than a fourth preset threshold value.

In one embodiment of the present invention, the new energy power generation device includes at least one of a photovoltaic power generation device and a wind power generation device.

In one embodiment of the invention, the inverter is a bidirectional energy storage converter.

In an embodiment of the present invention, the charging instruction carries at least one of identification information, a charging start time, a charging end time, and a charging power of the battery replacement battery.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a swapping station according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a swapping station according to another embodiment of the present invention.

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.

The power swapping station according to an embodiment of the present invention is described below with reference to the drawings.

Fig. 1 is a schematic diagram of a swapping station according to an embodiment of the present invention.

As shown in fig. 1, the battery replacement station 100 according to the embodiment of the present invention includes a new energy power generation apparatus 1, a power grid access apparatus 2, an inverter 3, a battery replacement battery 4, and a controller 5.

The inverter 3 is respectively and electrically connected with the new energy power generation device 1, the power grid access device 2 and the battery replacement 4.

In the embodiment of the present disclosure, the new energy power generation device 1 is configured to convert new energy into first ac power at a first voltage level and output the first ac power.

In the embodiment of the present disclosure, the grid access device 2 is configured to receive the second ac power of the second voltage level from the grid and output the second ac power.

In the embodiment of the disclosure, the controller 5 is configured to send a charging instruction to the inverter 3, and the inverter 3 may convert at least one of the first alternating current electric energy and the second alternating current electric energy into the first direct current electric energy of the third voltage level based on the charging instruction, and charge the battery charger 4 with the first direct current electric energy.

In the embodiment of the present disclosure, the inverter 3 may directly convert at least one of the first ac power and the second ac power into the first dc power, that is, directly convert the ac power of the voltage class a into the dc power of the voltage class B, and compared with the related art, the inverter mostly converts the ac power of the voltage class a into the dc power of the voltage class a and then converts the dc power of the voltage class a into the dc power of the voltage class B, so that the conversion step of the inverter is simplified, which is helpful for improving the power conversion efficiency and reducing the power conversion loss.

The first voltage level, the second voltage level, and the third voltage level may be set according to actual situations, and are not limited herein. For example, the first voltage level and the second voltage level are both greater than the third voltage level.

In the embodiment of the present disclosure, the inverter 3 may convert at least one of the first ac power and the second ac power into the first dc power of the third voltage level based on the charging command, and may include the following three possible embodiments:

in the method 1, the inverter 3 may convert only the first ac power into the first dc power of the third voltage level based on the charging command, that is, only the first ac power generated by the new energy power generation apparatus 1 is used to charge the battery 4.

In the mode 2, the inverter 3 can convert both the first alternating current electric energy and the second alternating current electric energy into the first direct current electric energy of the third voltage level based on the charging instruction, that is, the first alternating current electric energy generated by the new energy power generation device 1 and the second alternating current electric energy output by the power grid can be simultaneously used for charging the battery 4.

In the method 3, the inverter 3 may convert only the second ac power into the first dc power at the third voltage level based on the charging command, that is, only the second ac power output by the power grid is used to charge the battery 4.

In the embodiment of the disclosure, the battery replacement station comprises the new energy power generation device and the power grid access device, and alternating current electric energy generated by the new energy power generation device and the power grid can be used in combination, so that the charging mode is more flexible, the stability and reliability of power supply of the battery replacement station are improved, and the power consumption requirement of a user can be met.

On the basis of any of the above embodiments, the controller 5 is further configured to detect whether a preset power grid access condition is currently met, and when the preset power grid access condition is currently met, it indicates that the power conversion station can access the power grid at this time, the controller 5 may send an access instruction to the power grid access device 2, and the power grid access device 2 may establish electrical connection with the power grid based on the access instruction.

Or, the controller 5 detects that the power grid access condition is not met currently, and indicates that the power conversion station cannot be accessed to the power grid at this time, the controller 5 may send a disconnection instruction to the power grid access device 2, and the power grid access device 2 may disconnect the electrical connection between itself and the power grid based on the disconnection instruction.

The power grid access condition can be set according to actual conditions, and is not limited too much here. For example, the grid access condition includes at least one of:

and in the condition 1, the first alternating current electric energy is smaller than the required electric energy of the power conversion station.

If the first alternating current electric energy is smaller than the electric energy required by the battery replacement station, which indicates that the first alternating current electric energy generated by the new energy power generation device 1 cannot meet the power consumption requirement of the battery replacement station, it can be determined that the power grid access condition is met, so as to meet the power consumption requirement of the battery replacement station.

On the contrary, if the first alternating current electric energy is greater than or equal to the electric energy required by the power conversion station, it is indicated that the first alternating current electric energy generated by the new energy power generation device 1 can meet the power consumption requirement of the power conversion station, and the power conversion station can meet the power consumption requirement without being connected to the power grid, and it can be determined that the power grid access condition is not met at this time.

And 2, enabling the target parameters of the power grid to be in a preset target value range.

In the embodiment of the invention, the target parameters of the power grid can be detected in real time or periodically. It should be noted that the category of the target parameter is not limited too much, for example, the target parameter includes, but is not limited to, voltage, current, power, and the like. The target value range is a value range of a target parameter of the power grid in a stable state, and it can be understood that different target value ranges can be corresponded to different target parameters without the category of the target parameter.

If the target parameter of the power grid is within the preset target value range, the fluctuation range of the target parameter is small, the stability of the power grid is good, and at the moment, the condition that the power grid access condition is met can be judged, so that the stability and the reliability of power supply of the power changing station are improved.

On the contrary, if the target parameter of the power grid is not in the preset target value range, which indicates that the fluctuation range of the target parameter is large, the stability of the power grid is poor, and at this time, it can be determined that the power grid access condition is not met, so that the power switching station can be prevented from accessing the power grid when the stability of the power grid is poor, and the stability and the reliability of power supply of the power switching station are improved.

Therefore, the controller can control whether the power grid access device is electrically connected with the power grid or not based on whether the preset power grid access condition is met or not at present, and the power grid access is more flexible.

On the basis of any of the above embodiments, the controller 5 is further configured to detect whether a preset charging condition is currently satisfied, and when detecting that the preset charging condition is currently satisfied, the controller 5 sends a charging instruction to the inverter 3.

The charging condition may be set according to actual conditions, and is not limited herein. For example, the charging conditions include at least one of:

the condition 1 is that the remaining capacity of any battery replacement battery in the battery replacement station is smaller than a first preset threshold.

It should be noted that the first preset threshold is a critical value for determining whether the battery replacement battery needs to be charged, and may be set according to an actual situation, which is not limited herein, for example, the first preset threshold may be a maximum allowable charging amount of the battery replacement battery.

If the residual electric quantity of any battery replacing battery in the battery replacing station is smaller than the first preset threshold value, the battery replacing station is indicated to have a battery replacing battery with lower electric quantity, and the battery replacing battery needs to be charged, and then the charging condition can be judged to be met.

In one embodiment, the remaining capacity Of the battery charger may be a Charge capacity (SOC) Of the battery charger.

And 2, when any equipment to be charged in the charging station reaches a second preset threshold value, the accumulated waiting time of the equipment to be charged is up to the second preset threshold value.

In the embodiment of the disclosure, the accumulated waiting time refers to the accumulated time from the time when the equipment to be charged enters the charging station to the current time.

If the accumulated waiting time of any equipment to be replaced in the battery replacement station reaches the second preset threshold, it is indicated that the equipment to be replaced with the longer accumulated waiting time exists in the battery replacement station, the battery in the equipment to be replaced needs to be replaced by the battery replacement battery, or the battery in the equipment to be replaced is charged, and it can be determined that the charging condition is met.

It should be noted that the second preset threshold may be set according to actual situations, and is not limited herein, for example, the second preset threshold may be set to 30 minutes.

In the embodiment of the disclosure, the type of the device to be powered is not limited too much, for example, the device to be powered includes, but is not limited to, a vehicle, a mobile phone, a computer, and the like.

And 3, if any device to be charged exists in the charging station, the remaining available waiting time is less than a third preset threshold.

In the embodiment of the disclosure, the remaining available waiting time refers to a remaining time for which the device to be powered can stay at the power switching station.

If the remaining available waiting time of any device to be charged is smaller than the third preset threshold, it indicates that the device to be charged with a short remaining available waiting time exists in the charging station, and the battery in the device to be charged needs to be replaced by the charging battery, or the battery in the device to be charged is charged, so that the charging condition can be determined to be met.

It should be noted that the third preset threshold may be set according to actual situations, and is not limited herein, for example, the third preset threshold may be set to 1 hour.

And under the condition 4, the first alternating current electric energy is larger than the required electric energy of the power conversion station, and the difference value between the first alternating current electric energy and the required electric energy is larger than a fourth preset threshold value.

In the embodiment of the disclosure, if the first ac power is greater than the required power of the power conversion station, and the difference between the first ac power and the required power is greater than the fourth preset threshold, it indicates that the first ac power generated by the new energy power generation device 1 can meet the power consumption requirement of the power conversion station, and the first ac power is excessive, it can be determined that the charging condition is met, so as to fully utilize the first ac power generated by the new energy power generation device 1.

It should be noted that the fourth preset threshold may be set according to actual situations, and is not limited herein.

Therefore, the controller can send a charging instruction to the inverter when the charging condition is met based on whether the charging condition is met or not, and the charging mode is more flexible.

On the basis of any of the above embodiments, the charging instruction carries at least one of identification information, a charging start time, a charging end time, and charging power of the battery replacement 4.

In the embodiment of the present disclosure, identification information may be set in advance for each battery replacement 4 in the battery replacement station, so as to distinguish different battery replacement 4. The identification information includes, but is not limited to, text, characters, etc., and is not limited herein.

In one embodiment, the controller 5 may determine the swap battery needing to be charged based on the remaining capacity of the swap battery 4, for example, the controller 5 may determine the swap battery 4 with the remaining capacity less than the first preset threshold as the swap battery 4 needing to be charged. The controller 5 may further obtain identification information of the battery replacement 4 that needs to be charged, and send the identification information to the inverter 3, and the inverter 3 may determine the battery replacement 4 that needs to be charged based on the received identification information.

In one embodiment, the controller 5 may determine the charging power of the battery swapping battery based on at least one of the remaining capacity of the battery swapping battery 4, the remaining wait-able time period of the device to be swapped, and the difference between the first ac power and the required power of the swapping station, with the minimum charging power as a constraint condition. Therefore, the method can comprehensively consider the influence of the residual electric quantity of the battery replacement battery, the residual waiting time of the equipment to be replaced and the difference value between the first alternating current electric energy and the required electric energy of the battery replacement station on the charging power, so that the determined charging power is more accurate, the charging efficiency is improved, and the service life of the battery replacement battery is prolonged by taking the minimum charging power as a constraint condition.

On the basis of any of the above embodiments, as shown in fig. 2, the power conversion station 100 further includes a cloud server 6, where the cloud server 6 is configured to detect whether a preset charging condition is currently met, and when it is detected that the preset charging condition is currently met, the cloud server 6 sends a charging instruction to the controller 5, and the controller 5 feeds the charging instruction back to the inverter 3. Therefore, the inverter can charge the battery replacement battery according to the charging instruction of the cloud server. It should be noted that, for the relevant content of the charging condition, reference may be made to the above embodiments, and details are not described here.

Based on any of the above embodiments, the new energy source includes, but is not limited to, light energy, wind energy, ocean energy, etc., which is not limited herein. For example, the new energy power generation apparatus 1 may include at least one of a photovoltaic power generation apparatus, which may include a photovoltaic module, and a wind power generation apparatus, which may include a horizontal axis fan, a vertical axis fan, and the like.

In any of the above embodiments, the inverter 3 is a bidirectional energy storage converter (PCS).

As shown in fig. 2, the power conversion station 100 further includes an energy storage battery 7, and the inverter 3 is electrically connected to the energy storage battery 7. The controller 5 is further configured to send an energy storage instruction to the inverter 3, and the inverter 3 may convert at least one of the first alternating current electric energy and the second alternating current electric energy into a first direct current electric energy of a third voltage level based on the energy storage instruction, and charge the energy storage battery 7 with the first direct current electric energy to realize storage of the direct current electric energy; the controller 5 is further configured to send a discharge instruction to the inverter 3, and the inverter 3 may convert the first direct-current electric energy of the third voltage level stored in the energy storage battery 7 into at least one of the first alternating-current electric energy of the first voltage level and the second alternating-current electric energy of the second voltage level based on the discharge instruction, so as to implement feedback of the alternating-current electric energy.

On the basis of any of the above embodiments, the controller 5 may respectively establish network connections with the grid access device 2 and the inverter 3 to perform data transmission with the grid access device 2 and the inverter 3, so that the controller 5 may respectively send instructions to the grid access device 2 and the inverter 3 through the network connections. Alternatively, the network connection may be a mobile network, such as 3G, 4G, 5G, etc.

On the basis of any of the above embodiments, the power swapping station 100 may further include a distributed communication device for realizing communication between devices in the power swapping station 100, which is beneficial to shortening the wiring length in the power swapping station, improving the communication quality of the power swapping station, and having good expandability.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A power swapping station, comprising:

the system comprises a new energy power generation device, a power grid access device, an inverter, a battery replacement battery and a controller; the inverter is electrically connected with the new energy power generation device, the power grid access device and the battery replacement battery respectively;

the new energy power generation device is used for converting new energy into first alternating current electric energy of a first voltage level and outputting the first alternating current electric energy;

the power grid access device is used for receiving second alternating current electric energy of a second voltage grade from a power grid and outputting the second alternating current electric energy;

the controller is used for sending a charging instruction to the inverter, and the inverter can convert at least one of the first alternating current electric energy and the second alternating current electric energy into first direct current electric energy of a third voltage level based on the charging instruction and charge the battery with the first direct current electric energy;

the controller is further configured to detect whether a preset power grid access condition is currently met, where the power grid access condition includes that the first alternating current electric energy is smaller than the electric energy required by the power conversion station, and/or a target parameter of the power grid is within a preset target value range, where the target value range is a value range of the target parameter of the power grid in a stable state;

the controller is further configured to detect that the power grid access condition is currently met, and send an access instruction to the power grid access device, where the power grid access device may establish an electrical connection with the power grid based on the access instruction; alternatively, the first and second electrodes may be,

the controller detects that the power grid access condition is not met currently, and sends a disconnection instruction to the power grid access device, and the power grid access device can be electrically disconnected with the power grid based on the disconnection instruction;

the controller is further used for detecting whether a preset charging condition is met or not at present, and sending the charging instruction to the inverter by the controller when the charging condition is met at present;

the power swapping station further comprises:

the cloud server is used for detecting whether a preset charging condition is met currently or not, sending the charging instruction to the controller when the charging condition is met currently, and feeding the charging instruction back to the inverter by the controller;

the charging conditions include at least one of:

the method comprises the following steps that the residual electric quantity of any battery replacing battery in the battery replacing station is smaller than a first preset threshold value;

the accumulated waiting time of any equipment to be charged in the charging station reaches a second preset threshold;

the remaining waiting time of any equipment to be charged in the charging station is less than a third preset threshold;

the first alternating current electric energy is larger than the required electric energy of the power conversion station, and the difference value between the first alternating current electric energy and the required electric energy is larger than a fourth preset threshold value.

2. The power conversion station of claim 1, wherein the new energy power generation device comprises at least one of a photovoltaic power generation device and a wind power generation device.

3. The power conversion station of claim 1, wherein the inverter is a bidirectional energy storage converter.