Photovoltaic battery swap station

Abstract

The utility model discloses a photovoltaic battery swap station, which comprises a photovoltaic array, a direct current bus, an alternating current / direct current conversion module, a direct current conversion module, a battery, an acquisition module and a generated power control module, the photovoltaic array is electrically connected with the direct current bus; the AC / DC conversion module is electrically connected between a power supply grid and a DC bus; the DC conversion module is electrically connected between the DC bus and the battery; the acquisition module is at least electrically connected with the DC bus and the generated power control module; the generation power control module is also electrically connected with the AC / DC conversion module and / or the DC conversion module. By the adoption of the technical scheme, the number of times of photovoltaic energy conversion can be reduced, the utilization efficiency of photovoltaic energy is improved, and the electricity utilization cost of a photovoltaic battery swap station is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery replacement for new energy vehicles, and in particular to a photovoltaic battery replacement station. Background Art

[0002] Photovoltaic power generation can provide energy for battery swap stations on sunny days, and the battery swap stations can store the energy in batteries, so that the battery swap stations can also use the energy generated by photovoltaic power generation at night or on cloudy days. This solves the intermittent problem of photovoltaic power generation, can achieve smooth energy output, and brings more possibilities for the application of new energy.

[0003] The photovoltaic array converts the absorbed sunlight energy into direct current through the "photovoltaic effect", and then converts the direct current into alternating current through the DC / AC converter for use by the load or into the power grid; before the energy generated by the photovoltaic array enters the battery, it must first be converted into alternating current through the DC / AC converter, and then converted into direct current through the AC / DC converter. Figure 1 As shown, the signal on the bus is AC power, and the two-stage conversion increases the energy cost of the battery swap station and reduces the utilization efficiency of photovoltaic energy.

[0004] There are also solutions for direct DC connection of photovoltaic arrays, such as Figure 2 As shown, the signal on the bus is DC power. However, in order to adapt to the voltage of different batteries, DC converters need to be connected to the photovoltaic array access side and the battery access side respectively. This also requires two-stage conversion, and the utilization efficiency of photovoltaic energy is low.

[0005] Therefore, how to reduce the energy loss of battery swap stations and improve the utilization efficiency of photovoltaic energy has become a technical problem that needs to be solved urgently. Utility Model Content

[0006] The utility model provides a photovoltaic battery swap station to reduce energy loss in the battery swap station and improve the utilization efficiency of photovoltaic energy.

[0007] According to the utility model, a photovoltaic battery swap station is provided, comprising: a photovoltaic array, a DC bus, an AC / DC conversion module, a DC conversion module, a battery, a collection module and a power generation control module;

[0008] The photovoltaic array is electrically connected to the DC bus; the AC / DC conversion module is electrically connected between the power supply grid and the DC bus; the DC conversion module is electrically connected between the DC bus and the battery;

[0009] The acquisition module is electrically connected to at least the DC bus and the power generation control module; the power generation control module is also electrically connected to the AC / DC conversion module and / or the DC conversion module.

[0010] Optionally, the acquisition module comprises a voltage acquisition device and a current acquisition device.

[0011] The voltage acquisition device is configured to acquire an output voltage of the photovoltaic array, and the current acquisition device is configured to acquire an output current of the photovoltaic array.

[0012] Optionally, the AC / DC conversion module comprises an AC / DC controller and an AC / DC converter, the AC / DC controller is electrically connected to the power generation power control module and the AC / DC converter respectively, and the AC / DC converter is electrically connected between the power supply grid and the DC bus.

[0013] The DC conversion module comprises a DC controller and a DC converter, the DC converter is electrically connected to the power generation power control module and the DC converter respectively, and the DC converter is electrically connected between the DC bus and the battery.

[0014] Optionally, the power generation power control module comprises a power generation power calculator, a power generation power comparator, a memory and a power generation power adjustment unit.

[0015] The input end of the power generation power calculator is electrically connected to the acquisition module, and the output end of the power generation power calculator is electrically connected to the power input end of the power generation power comparator; wherein the output end of the power generation power calculator outputs photovoltaic power generation power.

[0016] The power output end of the power generation power comparator is electrically connected to the input end of the memory, and the output end of the memory is electrically connected to the reference input end of the power generation power comparator; wherein the power output end of the power generation power comparator outputs the photovoltaic power generation power.

[0017] The comparison output end of the power generation power comparator is electrically connected to the input end of the power generation power adjustment unit, and the output end of the power generation power adjustment unit is electrically connected to the control end of the AC / DC conversion module and / or the control end of the DC conversion module.

[0018] Optionally, the power generation power control module further comprises a supply-demand comparator, and the memory comprises a selection output switch.

[0019] The first input end of the supply-demand comparator is electrically connected to the output end of the power generation power calculator, and the second input end of the supply-demand comparator is electrically connected to the power output end of the DC conversion module, and the DC conversion module is further electrically connected to the battery; wherein the power output end of the DC conversion module outputs the charging demand power of the battery.

[0020] The comparison output end of the supply-demand comparator is electrically connected to the control end of the selection output switch.

[0021] The first input end of the selection output switch is electrically connected with the power output end of the generated power comparator; the second input end of the selection output switch is electrically connected with the power output end of the DC conversion module; the output end of the selection output switch is electrically connected with the reference input end of the generated power comparator; wherein the output end of the selection output switch outputs the photovoltaic generated power or the charging demand power.

[0022] Optionally, the comparison output end of the supply-demand comparator is further electrically connected with the enable end of the AC / DC conversion module and the enable end of the DC conversion module respectively.

[0023] Optionally, the generated power adjusting unit comprises an MPPT controller.

[0024] The input end of the MPPT controller is electrically connected with the comparison output end of the generated power comparator; the output end of the MPTT controller is electrically connected with the control end of the AC / DC conversion module and / or the control end of the DC conversion module.

[0025] Optionally, the generated power adjusting unit further comprises a PWM controller.

[0026] The output end of the MPPT controller is electrically connected with the control end of the PWM controller; the output end of the PWM controller is electrically connected with the control end of the AC / DC conversion module and / or the control end of the DC conversion module; wherein the output end of the PWM controller outputs a PWM signal.

[0027] Optionally, the AC / DC conversion module comprises a bidirectional AC / DC conversion module; and / or the DC conversion module comprises a bidirectional DC conversion module.

[0028] Optionally, the photovoltaic battery swap station comprises a plurality of the AC / DC conversion modules, a plurality of the DC conversion modules and a plurality of the batteries.

[0029] The power supply grid is electrically connected with the DC bus through a plurality of parallelly connected AC / DC conversion modules; the batteries are correspondingly electrically connected with the DC conversion modules.

[0030] The technical scheme of the utility model discloses, through setting up the direct current bus, the photovoltaic array is connected with the direct current bus electricity, make the photovoltaic energy that photovoltaic array generates only through the direct current conversion module that is connected between the direct current bus and the battery conversion once, namely, can be used by the load of photovoltaic power station, need not like the prior art as through multistage conversion, reduce the conversion times of photovoltaic energy, can effectively improve the utilization efficiency of photovoltaic energy, in addition, still through setting up acquisition module and power generation power control module, can detect the photovoltaic power of photovoltaic array, and through power generation power control module control the voltage of direct current bus, can realize making the maximum photovoltaic power of photovoltaic array, to further improve the utilization efficiency of photovoltaic energy, is favorable for reducing the electricity cost of photovoltaic power station.

[0031] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for ordinary skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0033] Figure 1 It is a kind of photovoltaic power station structure schematic view in prior art;

[0034] Figure 2 It is another kind of photovoltaic power station structure schematic view in prior art;

[0035] Figure 3 It is a kind of photovoltaic power station structure schematic view provided in the embodiment of the utility model;

[0036] Figure 4 It is another kind of photovoltaic power station structure schematic view provided in the embodiment of the utility model;

[0037] Figure 5 It is a kind of power generation power control module structure schematic view provided in the embodiment of the utility model;

[0038] Figure 6 It is a kind of power generation power adjustment unit structure schematic view provided in the embodiment of the utility model;

[0039] Figure 7 It is another kind of power generation power control module structure schematic view provided in the embodiment of the utility model. DETAILED DESCRIPTION

[0040] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0041] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application. The technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0043] Figure 3 is a structural schematic diagram of a photovoltaic battery swap station provided by the embodiments of the present application, referring to Figure 3 The photovoltaic battery swap station includes a photovoltaic array 20, a direct current bus 01, an AC / DC conversion module 30, a DC conversion module 40, a battery 50, an acquisition module 60 and a power generation power control module 70. The photovoltaic array 20 is electrically connected with the direct current bus 01, the AC / DC conversion module 30 is electrically connected between a power supply grid and the direct current bus 01, and the DC conversion module 40 is electrically connected between the direct current bus 01 and the battery 50. The acquisition module 60 is electrically connected with at least the direct current bus 01 and the power generation power control module 70; the power generation power control module 70 is also electrically connected with the AC / DC conversion module 30 and / or the DC conversion module 40.

[0044] The photovoltaic array 20 can include a plurality of photovoltaic components assembled together, and direct current generated by the photovoltaic array 20 can be directly provided to the direct current bus 01. The direct current bus 01 can include a positive line 011 and a negative line 012. The power supply grid can include a commercial power supply, which is generally alternating current.

[0045] The AC / DC conversion module 30 includes a unidirectional AC / DC converter for converting alternating current in the power supply grid into direct current and transmitting the direct current to the direct current bus 01. The DC conversion module 40 includes a unidirectional DC / DC converter for converting high-voltage direct current of the direct current bus 01 into medium / low-voltage direct current and providing the medium / low-voltage direct current to the battery 50. In an optional embodiment, the AC / DC conversion module 30 and the DC conversion module 40 each include a monitoring unit for monitoring and feeding back current, voltage, power, and the like.

[0046] The battery 50 can include a storage battery of the photovoltaic battery swap station to balance intermittent photovoltaic energy provided by the photovoltaic array 20, so that the photovoltaic battery swap station can always have power; the battery 50 can also include a battery swap battery, which can be a battery replaced in a new energy vehicle or a battery located in a new energy vehicle.

[0047] The acquisition module 60 is configured to acquire output current and output voltage of the photovoltaic array 20. In an optional embodiment, the acquisition module 60 includes a voltage acquisition device 610 and a current acquisition device 620. The voltage acquisition device 610 can acquire output voltage of the photovoltaic array 20 by acquiring voltage of the direct current bus 01, or the voltage acquisition device 610 can acquire output voltage of the photovoltaic array 20 by directly acquiring voltage of an output end of the photovoltaic array 20. The current acquisition device 620 can acquire output current of the photovoltaic array 20 by acquiring current of the output end of the photovoltaic array 20.

[0048] The power generation power control module 70 is configured to acquire photovoltaic power generation power of the photovoltaic array 20 according to output current and output voltage of the photovoltaic array 20 acquired by the acquisition module 60, and to control output voltage of the AC / DC conversion module 30 and / or input voltage of the DC conversion module 40 according to the photovoltaic power generation power of the photovoltaic array 20, so as to indirectly control voltage of the direct current bus 01, thereby achieving control of the photovoltaic power generation power of the photovoltaic array 20.

[0049] For example, the photovoltaic array 20 can generate photovoltaic energy on a sunny day, and the photovoltaic energy generated by the photovoltaic array 20 can be directly transmitted to the DC bus 01 to supply power to the photovoltaic battery swap station; the DC conversion module 40 can convert the DC power of the DC bus 01 into DC power with a voltage suitable for charging the battery 50; and the battery 50 can store the photovoltaic energy generated by the photovoltaic array 20. On a cloudy day or at night, when the battery 50 of the photovoltaic battery swap station stores less energy, or when the photovoltaic power generation power of the photovoltaic array 20 is less than the charging demand power of the battery 50, the AC / DC conversion module 30 can convert the AC power of the power supply grid into DC power and transmit the DC power to the DC bus 01 to supply power to the photovoltaic battery swap station.

[0050] The power generation power control module 70 can adjust the voltage of the DC bus 01 by controlling the AC / DC conversion module 30 and / or the DC conversion module 40, so that the photovoltaic power generation power of the photovoltaic array 20 reaches the maximum, and the utilization rate of the photovoltaic energy of the photovoltaic array 20 is improved.

[0051] The photovoltaic battery swap station provided by the embodiment of the utility model, through setting DC bus, make photovoltaic array with DC bus electric connection, make photovoltaic array generate's photovoltaic energy only through the DC conversion module of electric connection between DC bus and battery conversion once, namely can be used by the load of photovoltaic battery swap station, do not need like prior art as through multistage conversion, reduce the conversion times of photovoltaic energy, can effectively improve the utilization efficiency of photovoltaic energy, in addition, still through setting acquisition module and power generation power control module, can detect the photovoltaic power generation power of photovoltaic array, and through power generation power control module control DC bus's voltage, can realize make photovoltaic array's maximum photovoltaic power generation power, thereby further improve the utilization efficiency of photovoltaic energy, be favorable to reduce the electricity cost of photovoltaic battery swap station.

[0052] Optionally, the AC / DC conversion module 30 comprises a bidirectional AC / DC conversion module; and / or, the DC conversion module 40 comprises a bidirectional DC conversion module.

[0053] For example, when the photovoltaic power generation power of the photovoltaic array 20 is greater than the charging demand power of the battery 50, the photovoltaic energy of the photovoltaic array 20 can be transmitted to the power supply grid through the AC / DC conversion module 30, so that the photovoltaic array 20 can supply power to the power supply grid in reverse, which is conducive to improving the utilization efficiency of photovoltaic energy and reducing the electricity cost of the photovoltaic battery swap station.

[0054] When the photovoltaic power generation power of the photovoltaic array 20 is small, and the power supply grid is abnormally powered off or the AC / DC conversion module 30 is faulty, the energy stored in the battery 50 can be transmitted to the DC bus 01 in reverse through the DC conversion module 40, so that other loads of the photovoltaic battery swap station can work normally, the normal operation of the photovoltaic battery swap station is maintained, and the operation and maintenance cost of the battery swap station is reduced.

[0055] Optionally, with reference to Figure 3 , the photovoltaic power station comprises a plurality of AC / DC conversion modules 30, a plurality of DC conversion modules 40 and a plurality of batteries 50, the power grid is electrically connected with the DC bus 01 through the plurality of AC / DC conversion modules 30 connected in parallel, and the batteries 50 are correspondingly electrically connected with the DC conversion modules 40.

[0056] Specifically, the plurality of AC / DC conversion modules 30 are connected in parallel, which can make the rated power of the AC / DC conversion modules 30 smaller, is conducive to reducing the procurement and construction cost, and can avoid the influence of the failure of the AC / DC conversion modules 30 on the normal operation of the photovoltaic power station, which is conducive to reducing the operation and maintenance cost. The plurality of batteries 50 and the plurality of DC conversion modules 40 are respectively correspondingly electrically connected, which is conducive to matching the photovoltaic power generation power of the photovoltaic array 20, so that each DC conversion module 40 works in a full load state, and the conversion efficiency is improved.

[0057] Optionally, Figure 4 is a structural schematic diagram of another photovoltaic power station provided by the embodiment of the utility model, with reference to Figure 4 , the AC / DC conversion module 30 comprises an AC / DC controller 310 and an AC / DC converter 320, the AC / DC controller 310 is electrically connected with the power generation power control module 70 and the AC / DC converter 320 respectively, and the AC / DC converter 320 is electrically connected between the power grid and the DC bus 01; the DC conversion module 40 comprises a DC controller 410 and a DC converter 420, the DC controller 410 is electrically connected with the power generation power control module 70 and the DC converter 420 respectively, and the DC converter 420 is electrically connected between the DC bus 01 and the battery 50.

[0058] Illustratively, the power generation power control module 70 can output a first control signal to the AC / DC controller 310, and the AC / DC controller 310 can control the working state, input voltage and output voltage of the AC / DC converter 320 according to the received first control signal. The power generation power control module 70 can also output a second control signal to the DC controller 410, and the DC controller 410 can control the working state, input voltage and output voltage of the DC converter 420 according to the received second control signal.

[0059] In other optional embodiments, the AC / DC controller 310 and / or the DC controller 410 can be integrated in the power generation power control module 70.

[0060] Optionally, Figure 5 is a structural schematic diagram of a power generation power control module provided by the embodiment of the utility model, with reference to Figure 4 and Figure 5The power generation power control module 70 comprises a power generation power calculator 710, a power generation power comparator 720, a memory 730 and a power generation power adjustment unit 740. The input end 711 of the power generation power calculator 710 is electrically connected with the acquisition module 60, and the output end 712 of the power generation power calculator 710 is electrically connected with the power input end 721 of the power generation power comparator 720; wherein the output end 712 of the power generation power calculator 710 outputs the photovoltaic power generation power. The power output end 722 of the power generation power comparator 720 is electrically connected with the input end 731 of the memory 730, and the output end 732 of the memory 730 is electrically connected with the reference input end 723 of the power generation power comparator 720; wherein the power output end 722 of the power generation power comparator 720 outputs the photovoltaic power generation power. The comparison output end 724 of the power generation power comparator 720 is electrically connected with the input end 741 of the power generation power adjustment unit 740, and the output end 742 of the power generation power adjustment unit 740 is electrically connected with the control end 313 of the AC / DC conversion module 30 and / or the control end of the DC conversion module 40.

[0061] Specifically, the acquisition module 60 outputs the acquired output current and output voltage of the photovoltaic array 20 to the power generation power calculator 710, and the power generation power calculator 710 is used for calculating the photovoltaic power generation power according to the output current and output voltage of the photovoltaic array 20 acquired by the acquisition module 60. The power input end 721 of the power generation power comparator 720 can receive the photovoltaic power generation power calculated by the power generation power calculator 710 and output the photovoltaic power generation power to the memory 430; the memory 430 can store the photovoltaic power generation power and output the photovoltaic power generation power to the reference input end 723 of the power generation power comparator 720, so that the power generation power comparator 720 can compare the current obtained photovoltaic power generation power with the last obtained photovoltaic power generation power. The power generation power adjustment unit 740 can determine the trend of the photovoltaic power generation power according to the comparison result of the current obtained photovoltaic power generation power and the last obtained photovoltaic power generation power, so as to output the control signal to the control end 311 of the DC / AC conversion module 30 and / or the control end of the DC conversion module 40, adjust the voltage of the DC bus 01, and realize the maximum photovoltaic power generation power.

[0062] For example, when the power generation power adjustment unit 740 increases or decreases the voltage of the DC bus 01 by controlling the AC / DC conversion module 30 and / or the DC conversion module 40, if the current obtained photovoltaic power generation power is greater than the last obtained photovoltaic power generation power, the voltage of the DC bus 01 is further increased or decreased, so that the photovoltaic power generation power continues to increase; if the current obtained photovoltaic power generation power is less than the last obtained photovoltaic power generation power, the voltage of the DC bus 01 is reversely decreased or increased, so that the photovoltaic power generation power increases.

[0063] In an optional embodiment, Figure 6is a structural schematic view of a power generation power adjusting unit provided by the embodiment of the utility model, reference Figure 5 and Figure 6 , the power generation power adjusting unit 740 includes MPPT controller 780, and the input end 781 of MPPT controller 780 is electrically connected with the comparison output end 724 of the power generation power comparator 720, and the output end 782 of MPPT controller 780 is electrically connected with the control end 313 of AC / DC conversion module 30 and / or the control end of DC conversion module 40.

[0064] Exemplarily, MPPT controller 780 can execute perturb and observe method, tracks maximum photovoltaic power generation power, and realizes maximum photovoltaic power generation power.

[0065] On the basis of the above embodiment, continue to refer to Figure 6 , the power generation power adjusting unit 740 further includes PWM controller 770, and the output end 782 of MPPT controller 780 is electrically connected with the control end 773 of PWM controller 770, and the output end 774 of PWM controller 770 is electrically connected with the control end 313 of AC / DC conversion module 30 and / or the control end of DC conversion module 40;Wherein, the output end 774 of PWM controller 770 outputs PWM signal.

[0066] Exemplarily, PWM controller 770 can output PWM signal of different duty cycles according to the control signal output by MPPT controller 780, controls the output voltage of AC / DC conversion module 30 and / or the input voltage of DC conversion module 40.

[0067] Optionally, Figure 7 is another structural schematic view of a power generation power control module provided by the embodiment of the utility model, reference Figure 4 and Figure 7The power generation power control module 70 further comprises a supply-demand comparator 750, and the memory 730 comprises a selection output switch 790. A first input end 751 of the supply-demand comparator 750 is electrically connected with an output end 712 of the power generation power calculator 710, a second input end 752 of the supply-demand comparator 750 is electrically connected with a power output end 444 of the DC conversion module 40, and the DC conversion module 40 is further electrically connected with the battery 50; wherein the power output end 444 of the DC conversion module 40 outputs the charging demand power of the battery 50. A comparison output end 754 of the supply-demand comparator 750 is electrically connected with a control end 793 of the selection output switch 790, a first input end 791 of the selection output switch 790 is electrically connected with a power output end 722 of the power generation power comparator 720, a second input end 792 of the selection output switch 790 is electrically connected with the power output end 444 of the DC conversion module 40, and an output end 794 of the selection output switch 790 is electrically connected with a reference input end 723 of the power generation power comparator 720; wherein the output end of the selection output switch 790 outputs the photovoltaic power generation power or the charging demand power.

[0068] Specifically, the DC conversion module 40 can monitor the charging demand power of the battery 50, and output the charging demand power to the supply-demand comparator 750. The supply-demand comparator 750 can also receive the photovoltaic power generation power calculated by the power generation power calculator 710, and compare the charging demand power of the battery 50 and the photovoltaic power generation power of the photovoltaic array 20. The selection output switch 790 can output the photovoltaic power generation power or the charging demand power to the reference input end 723 of the power generation power comparator 720 according to the comparison result of the charging demand power and the photovoltaic power generation power, and in combination with the power generation power adjustment unit 740, the photovoltaic power generation power of the photovoltaic array 20 can be continuously increased until the maximum is reached, or the photovoltaic power generation power of the photovoltaic array 20 can be continuously close to the charging demand power.

[0069] For example, when the charging demand power of the battery 50 is greater than the photovoltaic power generation power of the photovoltaic array 20, the selection output switch 790 can output the photovoltaic power generation power output by the power generation power comparator 720 according to the comparison result, so that the power generation power comparator 720 can compare the current obtained photovoltaic power generation power with the last obtained photovoltaic power generation power, which is conducive to realizing the maximum photovoltaic power generation power. When the charging demand power of the battery 50 is less than or equal to the photovoltaic power generation power of the photovoltaic array 20, the selection output switch 790 can output the charging demand power according to the comparison result, so that the power generation power comparator 720 can compare the current obtained photovoltaic power generation power with the charging demand power, which is conducive to matching the photovoltaic power generation power and the charging demand power, and realizing the energy conservation.

[0070] In an optional embodiment, continuing to refer to Figure 4 and Figure 7The comparison output end 754 of the supply-demand comparator 750 is also electrically connected with the enable end 301 of the AC / DC conversion module 30 and the enable end 401 of the DC conversion module 40 respectively.

[0071] For example, when the charging demand power of the battery 50 is greater than the photovoltaic power generation power of the photovoltaic array 20, the comparison output end 754 of the supply-demand comparator 750 can output a corresponding signal to control the AC / DC conversion module 30 and the DC conversion module 40 to work normally, and the photovoltaic array 20 and the power supply network supply power to the battery 50 at the same time. When the charging demand power of the battery 50 is less than or equal to the photovoltaic power generation power of the photovoltaic array 20, the comparison output end 754 of the supply-demand comparator 750 can output a corresponding signal to control the AC / DC conversion module 30 to stop working, and the DC conversion module 40 to work normally, and the photovoltaic array 20 supplies power to the battery 50.

[0072] It should be noted that the above are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

Claims

1. A photovoltaic battery swap station, characterized in that: include: Photovoltaic array, DC bus, AC / DC conversion module, DC conversion module, battery, acquisition module and power generation control module; The photovoltaic array is electrically connected to the DC bus; the AC / DC conversion module is electrically connected between the power supply grid and the DC bus; the DC conversion module is electrically connected between the DC bus and the battery; The acquisition module is electrically connected to at least the DC bus and the power generation control module; The power generation control module includes a power generation calculator, a power generation comparator, a memory, a power generation adjustment unit and a supply and demand comparator; the memory includes a selection output switch; The input end of the power generation calculator is electrically connected to the acquisition module, and the output end of the power generation calculator is electrically connected to the power input end of the power generation comparator; wherein the output end of the power generation calculator outputs the photovoltaic power generation; The power output end of the power generation power comparator is electrically connected to the first input end of the selection output switch, the second input end of the selection output switch is electrically connected to the power output end of the DC conversion module, and the output end of the selection output switch is electrically connected to the reference input end of the power generation power comparator; wherein, the power output end of the power generation power comparator outputs the photovoltaic power generation power, the power output end of the DC conversion module outputs the charging requirement power of the battery, and the output end of the selection output switch outputs the photovoltaic power generation power or the charging requirement power. The first input terminal of the supply-demand comparator is electrically connected to the output terminal of the power generation calculator; the second input terminal of the supply-demand comparator is electrically connected to the power output terminal of the DC conversion module, and the DC conversion module is also electrically connected to the battery; the comparison output terminal of the supply-demand comparator is electrically connected to the control terminal of the output selection switch; The comparison output terminal of the power generation comparator is electrically connected to the input terminal of the power generation adjustment unit, and the output terminal of the power generation adjustment unit is electrically connected to the control terminal of the AC / DC conversion module and / or the control terminal of the DC conversion module; The generated power adjustment unit is used to control the voltage of the DC bus according to the signal of the comparison output terminal of the generated power comparator.

2. The photovoltaic battery swap station according to claim 1, characterized in that: The acquisition module includes a voltage collector and a current collector; The voltage collector is used to collect the output voltage of the photovoltaic array; the current collector is used to collect the output current of the photovoltaic array.

3. The photovoltaic battery swap station according to claim 1, characterized in that: The AC / DC conversion module includes an AC / DC controller and an AC / DC converter; the AC / DC controller is electrically connected to the power generation control module and the AC / DC converter respectively; the AC / DC converter is electrically connected between the power supply grid and the DC bus; The DC conversion module includes a DC controller and a DC converter; the DC converter is electrically connected to the power generation control module and the DC converter respectively; the DC converter is electrically connected between the DC bus and the battery.

4. The photovoltaic battery swap station according to claim 1, characterized in that: The comparison output terminal of the supply-demand comparator is also electrically connected to the enable terminal of the AC / DC conversion module and the enable terminal of the DC conversion module respectively.

5. The photovoltaic battery swap station according to claim 1, characterized in that: The power generation adjustment unit includes an MPPT controller; The input end of the MPPT controller is electrically connected to the comparison output end of the power generation comparator; the output end of the MPPT controller is electrically connected to the control end of the AC / DC conversion module and / or the control end of the DC conversion module.

6. The photovoltaic battery swap station according to claim 5, characterized in that: The power generation adjustment unit further includes a PWM controller; The output end of the MPPT controller is electrically connected to the control end of the PWM controller; the output end of the PWM controller is electrically connected to the control end of the AC / DC conversion module and / or the control end of the DC conversion module; wherein the output end of the PWM controller outputs a PWM signal.

7. The photovoltaic battery swap station according to claim 1, characterized in that: The AC / DC conversion module includes a bidirectional AC / DC conversion module; and / or the DC conversion module includes a bidirectional DC conversion module.

8. The photovoltaic battery swap station according to claim 1, characterized in that: The photovoltaic battery swap station includes: a plurality of the AC / DC conversion modules, a plurality of the DC conversion modules and a plurality of the batteries; The power supply grid is electrically connected to the DC bus through a plurality of AC / DC conversion modules connected in parallel; and the battery is electrically connected to the DC conversion modules accordingly.

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