A charging method for a battery swap station, a vehicle battery swap station, and a battery swap method

Abstract

The present invention relates to the field of vehicle battery replacement technology, and specifically, to a battery replacement station charging method, a vehicle battery replacement station and a battery replacement method. The battery replacement station charging method includes obtaining the output current of clean energy within a first preset range and its output current and its changing trend. The output current is on an upward trend, and the clean energy power supply is controlled to charge at least part of the first battery box. When the first output current is too low and lower than a certain value, the clean energy power supply is controlled to charge the third battery box, and the AC power supply is controlled to charge the first battery box and the second battery box. When charging the battery with clean energy, a DC bus charging scheme is used to minimize energy loss. During general use, the battery box is directly used for vehicle use without energy storage and discharge functions, thereby reducing the loss in the process of clean energy utilization. The vehicle battery replacement station is applied to the battery replacement station charging method, and the battery replacement method is applied to the vehicle battery replacement station. In this way, the problem of low charging efficiency caused by the instability of clean energy is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle battery replacement, and in particular to a charging method for a battery replacement station, a vehicle battery replacement station and a battery replacement method. Background Art

[0002] With the enhancement of environmental awareness and the advancement of technology, clean energy has been greatly developed. Its application in power supply is mainly reflected in the field of power generation. For example, renewable resources such as solar energy, wind energy, hydropower, and geothermal energy are converted into electrical energy. These technologies produce almost no greenhouse gas emissions, which helps to reduce environmental pollution and alleviate the energy crisis. At the same time, the market for electric vehicles continues to expand, and its use cost is reduced and its performance is improved, which in turn drives the increase in demand for charging stations. Therefore, clean energy has been widely used in vehicle replacement stations. The use of clean energy such as solar energy and hydropower not only meets the energy replenishment needs of new energy vehicles, but also promotes the recycling of natural energy.

[0003] However, clean energy is unstable. Both solar energy and wind energy are easily affected by weather and other factors and will not always maintain high current output, which affects the charging efficiency of the battery box at the battery swap station, thereby affecting the efficiency of vehicle battery swapping and easily causing congestion during peak battery swapping periods. Therefore, a battery swapping method that can improve the battery swapping efficiency of clean energy battery swapping stations is urgently needed in the current market. Summary of the invention

[0004] In order to solve the problem of low charging efficiency caused by unstable clean energy in vehicle battery swap stations, the present invention provides a battery swap station charging method, a vehicle battery swap station and a battery swap method.

[0005] In a first aspect, the present invention provides a battery swap station charging method, the battery swap station charging method comprising: Step S10, based on the clean energy power source and the battery box assembly being in an electrically connected state, detecting the output current of the clean energy power source at a preset frequency; the vehicle battery swap station includes a charging assembly and the battery box assembly, and the charging assembly charges the battery box assembly; the charging assembly includes a mains power supply and the clean energy power source; the battery box assembly includes a first battery box, a second battery box and a third battery box; the distances from the first battery box, the second battery box and the third battery box to the parking and battery swapping area of ​​the vehicle battery swap station increase in sequence; Step S20, based on the output current of the clean energy power source being within a first preset range, obtaining a first output current of the clean energy power source and a change trend of the first output current; Step S30, based on the first output current being on an upward trend, controlling the clean energy power supply to charge at least part of the first battery box, and controlling the mains power supply to charge at least the second battery box; Step S40, based on the first output current being on a downward trend, controlling the clean energy power supply to charge the third battery box, and controlling the mains power supply to charge the first battery box and the second battery box.

[0006] In some embodiments, step S30 includes: Step S31, based on the first output current being on an upward trend, obtaining a real-time battery replacement frequency of the first battery box; the number of the first battery boxes is multiple; Step S32, based on the fact that the real-time battery replacement frequency of the first battery box is higher than the preset frequency, the clean energy power supply is controlled to centrally charge a portion of the first battery boxes, and the AC power supply is controlled to charge another portion of the first battery boxes and the second battery box.

[0007] In some embodiments, step S30 further includes: Step S33, based on the fact that the real-time battery replacement frequency of the first battery box is lower than the preset frequency, the clean energy power supply is controlled to charge all of the first battery boxes, and the AC power supply is controlled to charge the second battery box.

[0008] In some embodiments, the battery swap station charging method further includes: Step S40, based on the output current of the clean energy power source being within a second preset range, obtaining a second output current of the clean energy power source and a change trend of the second output current; the number of the second battery boxes is multiple; the minimum value of the second preset range is greater than the maximum value of the first preset range; Step S50, based on the rising trend of the second output current, control the clean energy power supply to charge at least the first battery box, and control the mains power supply to charge at least part of the second battery box.

[0009] In some embodiments, step S50 includes: Step S51, based on the second output current being on an upward trend, obtaining a real-time battery replacement frequency of the first battery box; Step S52, based on the fact that the real-time battery replacement frequency of the first battery box is lower than the preset frequency, the clean energy power source is controlled to charge the first battery box, and the mains power source is controlled to charge a part of the second battery boxes, and the other part of the second battery boxes are used as standby battery boxes; Step S53, based on the first battery box being fully charged, controlling the clean energy power source to charge the standby battery box; Step S54, based on the fact that the standby battery box is fully charged, controlling the clean energy power source to charge the third battery box.

[0010] In some embodiments, the battery swap station charging method further includes: Step S60, based on the second output current being in a downward trend, obtaining a real-time state of charge of the first battery box; Step S70, based on the fact that the real-time state of charge of the first battery box is higher than the preset state of charge, the clean energy power supply is controlled to charge the first battery box, and the mains power supply is controlled to charge the second battery box.

[0011] In some embodiments, step S70 includes: Step S71, based on the real-time state of charge of the first battery box being higher than a preset state of charge, controlling the clean energy power source to charge the first battery box, and controlling the mains power source to charge the second battery box; Step S72: based on the first battery box reaching a fully charged state, controlling the clean energy power source to charge the third battery box.

[0012] In some embodiments, the battery swap station charging method further includes: Step S80, based on the real-time state of charge of the first battery box being lower than a preset state of charge, controlling the clean energy power supply to charge the third battery box, and controlling the AC power supply to charge the first battery box and the second battery box.

[0013] In a second aspect, the present invention provides a vehicle swap station, the vehicle swap station is applied to any of the battery swap station charging methods in the first aspect, the vehicle swap station comprising: A charging component, the charging component comprising a mains power supply and the clean energy power supply; A battery box assembly, wherein the charging assembly charges the battery box assembly; the battery box assembly includes the first battery box, the second battery box and the third battery box; the distances from the first battery box, the second battery box and the third battery box to the parking and battery swapping area of ​​the vehicle battery swapping station increase successively.

[0014] In a third aspect, the present invention provides a vehicle battery replacement method, the vehicle battery replacement method is applied to the vehicle battery replacement station in the second aspect, and the vehicle battery replacement method includes: Step S100, based on the battery swapping vehicle being located in the parking and battery swapping area of ​​the vehicle battery swapping station, obtaining the real-time charge state of the first battery box; Step S200, based on the real-time state of charge of the first battery box being higher than the reference state of charge, replacing the first battery box with the battery-swapping vehicle; Step S300, obtaining a state of charge of a second battery box based on the real-time state of charge of the first battery box being lower than a reference state of charge; Step S400, based on the real-time state of charge of the second battery box being higher than the reference state of charge, replacing the second battery box with the battery-swapping vehicle; Step S500, based on the real-time state of charge of the second battery box being lower than a reference state of charge, obtaining the state of charge of the third battery box; Step S600, based on the real-time state of charge of the third battery box being higher than the reference state of charge, the third battery box is replaced on the battery-swapping vehicle.

[0015] In order to solve the problem of low charging efficiency caused by the instability of clean energy in vehicle swap stations, the present invention has the following advantages: Based on whether the output current of the clean energy power supply is within the preset range and whether the output current change trend is rising or falling, it can be judged whether the charging efficiency of the clean energy power supply in the future can meet the needs of vehicle battery replacement, and then it can be determined whether the clean energy power supply should be used to charge the battery box assembly closer to the parking battery replacement area or the battery box assembly farther away. In this way, clean energy can be fully utilized and the battery replacement efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram showing a flow chart of a charging method for a battery swap station according to an embodiment; Figure 2 A schematic diagram of a vehicle battery swap station according to an embodiment is shown; Figure 3 A circuit diagram of a vehicle battery swap station according to an embodiment is shown; Figure 4 A schematic flow chart of a battery replacement method according to an embodiment is shown.

[0017] Figure numerals: 10 charging assembly; 11 AC power supply; 12 clean energy power supply; 20 battery box assembly; 21 first battery box; 22 second battery box; 23 third battery box; 30 parking and battery exchange area; 40 battery exchange vehicle. DETAILED DESCRIPTION

[0018] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0019] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0020] As more and more electric vehicles are used, the demand for charging stations is also growing. In order to reduce costs and protect the environment, the use of clean energy in charging stations is increasing. However, clean energy such as solar energy and wind energy are affected by factors such as weather, and thus cannot provide stable current output. If only clean energy is used, the charging efficiency of the battery swap station cannot be guaranteed. In order to make full use of clean energy and ensure the efficiency of battery swapping, a charging method for a battery swap station is provided in this embodiment, such as Figure 1 As shown, the battery swap station charging method may include steps S10 to S40, and each step is described in detail as follows: Step S10, based on the fact that the clean energy source 12 and the battery box assembly 20 are in electrical connection, the output current of the clean energy source 12 can be detected in real time at a preset frequency. Figure 2 and Figure 3As shown, the vehicle battery swap station may include a charging component 10 and a battery box component 20, and the charging component 10 may charge the battery box component 20. The charging component 10 may include a mains power supply 11 and a clean energy power supply 12, and the mains power supply 11 may provide a stable current output; the clean energy power supply 12 may include multiple charging systems, and the multiple charging systems may be connected in series through a contactor. Both the mains power supply 11 and the clean energy power supply 12 can charge one or more battery boxes at the same time. The battery box assembly 20 may include a first battery box 21, a second battery box 22, and a third battery box 23. The distances from the first battery box 21, the second battery box 22, and the third battery box 23 to the parking and battery swap area 30 of the vehicle battery swap station increase successively. When the vehicle is swapping batteries, the first battery box 21, which is closest, may be replaced first to improve efficiency.

[0021] Step S20, when the detected output current of the clean energy power source 12 is within the first preset range, the first output current of the clean energy power source 12 and the change trend of the first output current can be obtained. Among them, the first preset range can be 20% to 30% of the upper limit of the output current of the clean energy power source 12 in 24 hours. The change trend of the first output current can be obtained by obtaining two current values ​​separated by a certain time period, such as 10 minutes, and the change trend of the first output current can be calculated based on the comparison of the two values. Whether it is rising or falling.

[0022] Step S30, when the first output current is on an upward trend, although the first output current is only 20%~30% of the upper limit of the output current, the current is relatively weak, but it can continue to grow for a period of time. At this time, the clean energy power supply 12 can be controlled to charge at least part of the first battery box 21. At this time, the charging efficiency of the first battery box 21 is less affected, and the AC power supply 11 can be controlled to charge the second battery box 22 to ensure the charge state of the second battery box 22.

[0023] Step S40, when the first output current is on a downward trend, that is, the power output of the clean energy power supply 12 is low and continues to decline for a period of time, and it is very likely that it will not be able to meet the demand for battery replacement. At this time, the clean energy power supply 12 can be controlled to charge the third battery box 23 that is not often replaced, so as to make full use of the small amount of remaining clean energy. Control the mains power supply 11 to charge the first battery box 21 and the second battery box 22 to ensure charging efficiency. That is, at night when clean energy is completely unable to provide electricity, the mains power supply can be used to preferentially charge the battery box closest to the battery replacement vehicle.

[0024] In this embodiment, step S30 may include step S31 and step S32, which are described in detail as follows: Step S31, when the first output current is on an upward trend, the real-time battery replacement frequency of the first battery box 21 can be obtained to determine whether the power output of the first output current can meet the current battery replacement demand. There are multiple first battery boxes 21.

[0025] Step S32, when the real-time power exchange frequency of the first battery box 21 is higher than the preset frequency, that is, the current power output of the clean energy power source 12 is low and in the growth stage, and the power exchange frequency is high, the clean energy power source 12 can be controlled to charge part of the first battery box 21, and the mains power source 11 can be controlled to charge the other part of the first battery box 21 and the second battery box 22, thereby increasing the charging efficiency of part of the first battery box 21, and using the mains power as compensation to supply power to the other part of the first battery box 21, thereby improving the overall charging speed of all the first battery boxes 21. That is, when the demand for power exchange is high and the clean energy power source is insufficient, the mains power source can be used to supplement it, thereby giving priority to ensuring the power exchange efficiency.

[0026] In this embodiment, step S30 may further include step S33, which is described in detail as follows: Step S33, when the real-time power exchange frequency of the first battery box 21 is lower than the preset frequency, the clean energy power supply 12 can be controlled to charge all the first battery boxes 21, and the mains power supply 11 can be controlled to charge the second battery box 22. The output current of the clean energy power supply 12 is within the first preset range and has an upward trend, which can meet the power exchange demand below the preset frequency. Therefore, charging all the first battery boxes 21 can make full use of clean energy, while ensuring the power exchange efficiency and reducing energy consumption.

[0027] In this embodiment, the battery swap station charging method may further include steps S40 to S50, which are described in detail as follows: Step S40, when the output current of the clean energy power source 12 is within the second preset range, the second output current of the clean energy power source 12 and the change trend of the second output current can be obtained. Among them, the number of the second battery box 22 is multiple. The minimum value of the second preset range is greater than the maximum value of the first preset range. The second preset range can be, for example, 70% to 80% of the upper limit value of the output current of the clean energy power source 12 in 24 hours, that is, at this time, the output current of the clean energy power source 12 reaches a higher value.

[0028] Step S50, when the second output current is on an upward trend, the output of the clean energy power supply 12 is sufficient, and the clean energy power supply 12 can be controlled to charge at least the first battery box 21, and the AC power supply 11 can be controlled to charge at least part of the second battery box 22.

[0029] In addition, excess electricity from clean energy can be uploaded to the power grid to power other electrical equipment.

[0030] The traditional method of utilizing clean energy requires first converting it into AC power for grid connection, and then rectifying it into DC power to charge the battery box, resulting in large power loss. In this embodiment, the clean energy power supply can directly charge the first battery box through the DC-DC power supply module, resulting in less power loss, avoiding a large amount of power loss, and achieving the purpose of energy saving.

[0031] In this embodiment, step S50 includes step S51 to step S54, and each step is described in detail as follows: Step S51, when the detected second output current shows an upward trend, the real-time battery replacement frequency of the first battery box 21 can be obtained.

[0032] Step S52, when the real-time battery replacement frequency of the first battery box 21 is lower than the preset frequency, the clean energy power supply 12 can be controlled to charge all the first battery boxes 21, and the AC power supply 11 can be controlled to charge part of the second battery boxes 22, and the other part of the second battery boxes 22 can be used as reserve battery boxes.

[0033] Step S53, when the first battery box 21 is fully charged, the clean energy power supply 12 can be controlled to charge the standby battery box. At this time, the frequency of power replacement is low, but the clean energy power is sufficient and still has a growth trend. The speed of charging the first battery box 21 with clean energy is sufficient to meet the demand for power replacement, but there is still power remaining. At this time, in order to maximize the utilization of clean energy, a standby battery box is reserved so that the clean energy power supply 12 can charge the standby battery box. Among them, the standby battery box can be used as a storage battery to power other electrical equipment in an emergency.

[0034] Step S54, when all the reserve battery boxes are fully charged, the clean energy power source 12 can be controlled to charge the third battery box 23.

[0035] When the output current of the clean energy power supply 12 is high and still on an upward trend, the clean energy power supply 12 is controlled to charge the first battery box 21, the second battery box 22 as a backup battery box, and the third battery box 23 in turn, which can make full use of clean energy and avoid energy waste.

[0036] In this embodiment, the battery swap station charging method may further include steps S60 to S70, each of which is described in detail as follows: Step S60, when the second output current is in a downward trend, that is, the output current of the clean energy power source 12 is currently high but cannot be guaranteed in the future, the real-time charge state of the first battery box 21 can be obtained.

[0037] Step S70, when the real-time state of charge of the first battery box 21 is higher than the preset state of charge, that is, when the first battery box 21 has a high charge and can be fully charged quickly, the clean energy power source 12 can be controlled to charge the first battery box 21, so that the charging efficiency of the first battery box 21 is not easily affected by the output current decline of the clean energy power source 12. Control the AC power source 11 to charge the second battery box 22.

[0038] In this embodiment, step S70 may include step S71 to step S72, and each step is described in detail as follows: Step S71 , when the real-time state of charge of the first battery box 21 is higher than the preset state of charge, the clean energy power source 12 can be controlled to charge the first battery box 21 , and the AC power source 11 can be controlled to charge the second battery box 22 .

[0039] Step S72, when the first battery box 21 reaches a fully charged state, the clean energy power supply 12 is controlled to charge the third battery box 23. Because the output current of the clean energy power supply 12 at this time is on a downward trend, the output current after the first battery box 21 is fully charged may not be able to meet the subsequent battery replacement needs, so the mains power supply 11 is controlled to charge the first battery box 21 and the second battery box 22, and the clean energy power supply 12 is controlled to charge the third battery box 23 to ensure the battery replacement efficiency.

[0040] In this embodiment, the battery swap station charging method may further include step S80, which is described in detail as follows: Step S80, when the real-time state of charge of the first battery box 21 is lower than the preset state of charge, that is, the first battery box 21 needs a long time to be fully charged, the clean energy power supply 12 can be controlled to charge the third battery box 23, and the AC power supply 11 can be controlled to charge the second battery box 22.

[0041] The output current of the clean energy power supply 12 shows a downward trend, while the power of the first battery box 21 is relatively low. If the first battery box 21 is charged with the clean energy power supply 12, the charging speed may become slower and slower over time, and it is impossible to provide a fully charged battery for the battery replacement vehicle 40, thereby affecting the battery replacement efficiency.

[0042] This embodiment provides a vehicle swap station, which is applied to any of the battery swap station charging methods in the above embodiments, such as Figure 2 and Figure 3 As shown, the vehicle battery swap station includes a charging assembly 10 and a battery box assembly 20 .

[0043] The charging assembly 10 may include a mains power supply 11 and a clean energy power supply 12. The clean energy power supply 12 may include at least one of a wind power supply, a solar power supply, and a hydropower supply. The charging assembly 10 may charge the battery box assembly 20, and the mains power supply 11 may provide a stable current output; the clean energy power supply 12 may include multiple charging systems, and the multiple charging systems may be connected in series through a contactor. Both the mains power supply 11 and the clean energy power supply 12 may charge one or more battery boxes at the same time.

[0044] The battery box assembly 20 may include a first battery box 21, a second battery box 22, and a third battery box 23. The distances from the first battery box 21, the second battery box 22, and the third battery box 23 to the parking and battery swapping area 30 of the vehicle battery swapping station increase in sequence. There may be multiple first battery boxes 21, second battery boxes 22, and third battery boxes 23.

[0045] This embodiment provides a vehicle battery replacement method, which is applied to the vehicle battery replacement station in the above embodiment, such as Figure 4 As shown, the vehicle battery replacement method may include steps S100 to S600, and each step is described in detail as follows: Step S100, based on the battery swapping vehicle 40 being located in the parking and battery swapping area 30 of the vehicle battery swapping station, the real-time charge status of the first battery box 21 is obtained.

[0046] Step S200, when the real-time state of charge of the first battery box 21 is higher than the reference state of charge, the first battery box 21 can be replaced on the battery swapping vehicle 40. The first battery box 21 is the battery box assembly 20 closest to the vehicle battery swapping station, so the battery swapping speed is the fastest. The reference state of charge can be a full charge state or an 80% state of charge.

[0047] Step S300 : when the real-time state of charge of the first battery box 21 is lower than the reference state of charge, the state of charge of the second battery box 22 is obtained.

[0048] Step S400, when the real-time state of charge of the second battery box 22 is higher than the reference state of charge, the second battery box 22 is replaced on the battery-swap vehicle 40.

[0049] Step S500 : when the real-time state of charge of the second battery box 22 is lower than the reference state of charge, the state of charge of the third battery box 23 is acquired.

[0050] Step S600, when the real-time state of charge of the third battery box 23 is higher than the reference state of charge, the third battery box 23 is replaced on the battery-swap vehicle 40.

[0051] The distances from the first battery box 21, the second battery box 22 and the third battery box 23 to the parking and battery swapping area 30 of the vehicle battery swapping station increase successively, and the battery box assembly 20 that is closest to the reference charge state is captured first, which can ensure a faster battery swapping speed.

[0052] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A charging method for a battery swap station, characterized in that: The battery swap station charging method comprises: Step S10, based on the clean energy power source and the battery box assembly being in an electrically connected state, detecting the output current of the clean energy power source at a preset frequency; the vehicle battery swap station includes a charging assembly and the battery box assembly, and the charging assembly charges the battery box assembly; the charging assembly includes a mains power supply and the clean energy power source; the battery box assembly includes a first battery box, a second battery box and a third battery box; the distances from the first battery box, the second battery box and the third battery box to the parking and battery swapping area of ​​the vehicle battery swap station increase in sequence; Step S20, based on the output current of the clean energy power source being within a first preset range, obtaining a first output current of the clean energy power source and a change trend of the first output current; Step S30, based on the first output current being on an upward trend, controlling the clean energy power source to charge at least part of the first battery box; Step S40, based on the first output current being on a downward trend, controlling the clean energy power supply to charge the third battery box, and controlling the mains power supply to charge the first battery box and the second battery box.

2. A battery swap station charging method according to claim 1, characterized in that: The step S30 comprises: Step S31, based on the first output current being on an upward trend, obtaining a real-time battery replacement frequency of the first battery box; the number of the first battery boxes is multiple; Step S32, based on the fact that the real-time battery replacement frequency of the first battery box is higher than the preset frequency, the clean energy power supply is controlled to centrally charge a portion of the first battery boxes, and the AC power supply is controlled to charge another portion of the first battery boxes and the second battery box.

3. A charging method for a battery swap station according to claim 2, characterized in that: The step S30 further includes: Step S33, based on the fact that the real-time battery replacement frequency of the first battery box is lower than the preset frequency, the clean energy power supply is controlled to charge all of the first battery boxes, and the AC power supply is controlled to charge the second battery box.

4. A battery swap station charging method according to claim 1, characterized in that: The battery swap station charging method further includes: Step S40, based on the output current of the clean energy power source being within a second preset range, obtaining a second output current of the clean energy power source and a change trend of the second output current; the number of the second battery boxes is multiple; the minimum value of the second preset range is greater than the maximum value of the first preset range; Step S50, based on the rising trend of the second output current, control the clean energy power supply to charge at least the first battery box, and control the mains power supply to charge at least part of the second battery box.

5. A charging method for a battery swap station according to claim 4, characterized in that: The step S50 comprises: Step S51, based on the second output current being on an upward trend, obtaining a real-time battery replacement frequency of the first battery box; Step S52, based on the fact that the real-time battery replacement frequency of the first battery box is lower than the preset frequency, the clean energy power source is controlled to charge the first battery box, and the mains power source is controlled to charge a portion of the second battery boxes, and the other portion of the second battery boxes are used as standby battery boxes; Step S53, based on the first battery box being fully charged, controlling the clean energy power source to charge the standby battery box; Step S54, based on the fact that the standby battery box is fully charged, controlling the clean energy power source to charge the third battery box.

6. A charging method for a battery swap station according to claim 4, characterized in that: The battery swap station charging method further includes: Step S60, based on the second output current being in a downward trend, obtaining a real-time state of charge of the first battery box; Step S70, based on the fact that the real-time state of charge of the first battery box is higher than the preset state of charge, the clean energy power supply is controlled to charge the first battery box, and the mains power supply is controlled to charge the second battery box.

7. A charging method for a battery swap station according to claim 6, characterized in that: The step S70 includes: Step S71, based on the real-time state of charge of the first battery box being higher than a preset state of charge, controlling the clean energy power source to charge the first battery box, and controlling the mains power source to charge the second battery box; Step S72: based on the first battery box reaching a fully charged state, controlling the clean energy power source to charge the third battery box.

8. A battery swap station charging method according to claim 6, characterized in that: The battery swap station charging method further includes: Step S80, based on the real-time state of charge of the first battery box being lower than a preset state of charge, controlling the clean energy power supply to charge the third battery box, and controlling the AC power supply to charge the first battery box and the second battery box.

9. A vehicle battery swap station, applied to the battery swap station charging method according to any one of claims 1 to 8, characterized in that: The vehicle swap station comprises: A charging component, the charging component comprising a mains power supply and the clean energy power supply; A battery box assembly, wherein the charging assembly charges the battery box assembly; the battery box assembly includes the first battery box, the second battery box and the third battery box; the distances from the first battery box, the second battery box and the third battery box to the parking and battery swapping area of ​​the vehicle battery swapping station increase successively.

10. A vehicle battery replacement method, applied to the vehicle battery replacement station according to claim 9, characterized in that: The vehicle battery replacement method comprises: Step S100, based on the battery swapping vehicle being located in the parking and battery swapping area of ​​the vehicle battery swapping station, obtaining the real-time charge state of the first battery box; Step S200, based on the real-time state of charge of the first battery box being higher than the reference state of charge, replacing the first battery box with the battery-swapping vehicle; Step S300, obtaining a state of charge of a second battery box based on the real-time state of charge of the first battery box being lower than a reference state of charge; Step S400, based on the real-time state of charge of the second battery box being higher than the reference state of charge, replacing the second battery box with the battery-swapping vehicle; Step S500, based on the real-time state of charge of the second battery box being lower than a reference state of charge, obtaining the state of charge of the third battery box; Step S600, based on the real-time state of charge of the third battery box being higher than the reference state of charge, the third battery box is replaced on the battery-swapping vehicle.

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