Dynamic photovoltaic power generation system, refrigerator car and working method

Abstract

The invention belongs to the technical field of power generation, and particularly relates to a power supply or distribution circuit system, in particular to a dynamic photovoltaic power generation system, a refrigerator car and a working method.The dynamic photovoltaic power generation system comprises a plurality of power generation modules, the power generation modules are electrically connected with MPPT modules, and the power generation modules are connected through solid-state relay modules; the power generation module, the MPPT module and the solid-state relay module are electrically connected with the control module; the control module is configured to obtain the real-time output power of each power generation module according to each MPPT module at each detection time interval, and control the solid-state relay module of the corresponding power generation module to work according to the real-time output power from high to low, so that the total output power after the plurality of power generation modules are connected in series meets the preset required charging total power; and the rest of the power generation modules are connected in parallel with one of the power generation modules connected in series, so that the series-parallel connection mode between the power generation modules can be adjusted according to different requirements, and the charging amount can be improved while different charging requirements are met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of power generation, and particularly relates to a power supply or distribution circuit system, and especially relates to a dynamic photovoltaic power generation system, a refrigerated truck and a working method. BACKGROUND

[0002] In a related photovoltaic power generation system, a plurality of power generation modules are arranged, and a plurality of power generation modules are arranged on the outer wall of the carriage of the refrigerated truck. The connection mode between the power generation modules is fixed, that is, series or parallel connection. The illumination of the sun on each power generation module of the refrigerated truck changes during the driving process of the refrigerated truck. However, the power generation capacity is fixed due to the fixed series and parallel connection mode between the power generation modules, and cannot be dynamically adjusted to meet different requirements.

[0003] Therefore, due to the technical problem that the series and parallel connection mode between the power generation modules in the photovoltaic power generation system of the refrigerated truck is fixed, the power generation capacity is fixed and cannot be dynamically adjusted to meet different requirements, a dynamic photovoltaic power generation system, a refrigerated truck and a working method need to be designed.

[0004] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered to constitute information of the prior art. SUMMARY

[0005] The present application at least provides a dynamic photovoltaic power generation system, a refrigerated truck and a working method.

[0006] In a first aspect, the present application provides a dynamic photovoltaic power generation system, comprising: a plurality of power generation modules, each of which is electrically connected with MPPT a module, and each power generation module is connected through a solid-state relay module; the power generation module, MPPT the module and the solid-state relay module are electrically connected with a control module; the control module is configured to obtain the real-time output power of each power generation module every interval detection time, and control the solid-state relay module of the corresponding power generation module to work from high to low according to the real-time output power, so that the total output power of the series connection of the plurality of power generation modules meets the preset required total charging power, and the remaining power generation modules are connected in parallel with one of the series connected power generation modules. MPPT In an optional implementation, the control module is configured to sequentially number all the power generation modules, obtain the real-time output power of each power generation module every interval detection time, and correspond the real-time output power of each power generation module with the number, and sort each power generation module from large to small according to the real-time output power.

[0007]

[0008] ​In an alternative embodiment, the power generation module is electrically connected with a battery module, and the battery module comprises a plurality of capacitor groups and a plurality of battery groups. The capacitor groups are electrically connected with the power generation module, and the capacitor groups are electrically connected with the battery groups. The capacitor groups and the battery groups are electrically connected with the control module. The control module is configured to control the power generation module to sequentially charge the capacitor groups, charge the next capacitor group when one capacitor group is fully charged, and sequentially charge the battery groups through the fully charged capacitor group when the capacitor group is fully charged.

[0009] In an alternative embodiment, the detection time is: T = α / n ; wherein, T is the detection time; α is the preset time; n is the number of battery groups to be charged.

[0010] In an alternative embodiment, the control module is further configured to accumulate the real-time output power from large to small according to the preset total required charging power, and when the accumulated total output power meets the preset total required charging power, the corresponding power generation module is connected in series, and the remaining other power generation modules are connected in parallel with any power generation module connected in series. If the total output power of all power generation modules connected in series is less than the preset total required charging power, the current real-time output power is used for charging.

[0011] In an alternative embodiment, the control module is further electrically connected with a plurality of increment modules, and the increment modules are also electrically connected with MPPT a capacitor module and a solid-state relay module. The increment module is connected in parallel with one of the series-connected power generation modules.

[0012] In an alternative embodiment, the increment module and the power generation module each comprise a plurality of series-connected photovoltaic cell pieces.

[0013] In an alternative embodiment, the output voltages of the increment module and the power generation module are the same.

[0014] In a second aspect, the embodiments of the present disclosure further provide a refrigerated truck, comprising: The dynamic photovoltaic power generation system described above is adopted.

[0015] In a third aspect, the embodiments of the present disclosure further provide a working method of the dynamic photovoltaic power generation system described above, comprising: The control module controls the solid state relay module of each MPPT The control module controls the solid state relay module of each

[0016] The dynamic photovoltaic power generation system has the advantages that the dynamic photovoltaic power generation system comprises a plurality of power generation modules, MPPT The power generation modules are connected through the solid state relay modules; the power generation modules, MPPT The power generation modules, the solid state relay modules and the control module are electrically connected; the control module is configured to acquire the real-time output power of each power generation module every detection time interval, MPPT The control module controls the solid state relay module of each

[0017] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and advantages of the application will be realized and attained by means of the instrumentalities and combinations pointed out in the description and appended claims.

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 A principle block diagram of a dynamic photovoltaic power generation system provided by the embodiment of the present disclosure is shown in the figure; Figure 2 An expanded schematic diagram of each power generation module of a refrigerated truck provided by the embodiment of the present disclosure is shown in the figure; Figure 3 A schematic diagram of photovoltaic cell installation on a refrigerated truck provided by the embodiment of the present disclosure is shown in the figure.

[0021] In the drawings: 1 power generation module, 2 photovoltaic cell. DETAILED DESCRIPTION

[0022] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the drawings, obviously, the described embodiments are some 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 those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] As used herein, the phrases "in an embodiment", "according to an embodiment", "in some embodiments", and the like generally mean the fact that a particular feature, structure, or characteristic described after the phrase can be included in at least one embodiment of the present disclosure. Therefore, the particular feature, structure, or characteristic can be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example", "exemplary", and the like are used as an example, instance, or illustration. Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example", "exemplary", and the like is intended to present the concept in a specific manner.

[0024] In a related photovoltaic power generation system, a plurality of power generation modules are arranged, and the connection mode between the power generation modules is fixed, i.e. series or parallel connection. However, in this mode, the power generation capacity is fixed due to the fixed series and parallel connection mode, and cannot be dynamically adjusted to meet different requirements.

[0025] The above-mentioned defects are the results of the inventors after practice and careful research, and therefore, the discovery process of the above-mentioned problems and the solutions proposed by the present disclosure for the above-mentioned problems should be the contributions of the inventors to the present disclosure in the process of the present disclosure.

[0026] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0028] As Figure 1As shown, at least one disclosed embodiment provides a dynamic photovoltaic power generation system, including: a plurality of power generation modules 1, each of which is electrically connected to... MPPT ( Maximum Power Point Tracking The power generation modules 1 are connected via solid-state relay modules, and each power generation module 1 is a maximum power point tracking (MPPT) module. MPPT Both the module and the solid-state relay module are electrically connected to the control module; the control module is configured to... MPPT The module acquires the real-time output power of each power generation module 1 at regular intervals and controls the solid-state relay module of the corresponding power generation module 1 to work from high to low according to the real-time output power, so that the total output power of several power generation modules 1 connected in series meets the preset total charging power. The remaining power generation modules 1 are connected in parallel with one of the power generation modules 1 connected in series, thereby realizing the adjustment of the series and parallel connection mode between the power generation modules 1 according to different needs. It can increase the charging capacity while meeting different charging needs. For example, the preset total charging power required when the refrigerated truck is in motion will be greater than the preset total charging power required when it is parked, so as to better charge the battery module during the refrigerated truck's operation, so that the battery module can better power the refrigeration system of the refrigerated truck and meet the refrigeration needs of the goods inside the refrigerated truck.

[0029] In this embodiment, by connecting several power generation modules 1 in series, the total output power meets the preset required total charging power and satisfies the charging demand. Then, the parallel-connected charging modules increase the output capacity, thereby increasing the power generation.

[0030] In this embodiment, since the exposure of each power generation module 1 on the refrigerated truck to sunlight changes continuously during the refrigerated truck's operation, the real-time output power of each power generation module 1 changes.

[0031] In one optional implementation, the detection time is: T = α / n ; in, T The detection time is in minutes. α This is a preset time, in minutes; n The number of battery packs that need to be charged, dimensionless.

[0032] In this embodiment, in order to maintain the stability of charging, the more battery packs that need to be charged, the shorter the interval detection time, that is, the shorter the interval for real-time output power detection, and then the series-connected power generation module 1 is adjusted according to the detection results of each time.

[0033] In the embodiment, the preset time can be 60 minutes, etc., which can be set according to actual needs.

[0034] In an optional embodiment, the control module is configured to sequentially number all the power generation modules 1, obtain the real-time output power of each power generation module 1 every interval detection time, and correspond the real-time output power of each power generation module 1 to the number, and sort the power generation modules 1 according to the real-time output power from large to small.

[0035] In the embodiment, the real-time output power is sorted from large to small after each detection, which can quickly determine the required series connection of the power generation modules 1.

[0036] In an optional embodiment, the control module is further configured to accumulate the real-time output power from large to small according to the preset required total charging power, and after the total output power after accumulation meets the preset required total charging power, the corresponding power generation module 1 is connected in series, and the remaining other power generation modules 1 are connected in parallel with any power generation module 1 connected in series, and if the total output power of all the power generation modules 1 connected in series is less than the preset required total charging power, the current real-time output power sum is used for charging.

[0037] In the embodiment, the preset required total charging power can be adjusted according to needs.

[0038] In the embodiment, the real-time output power is accumulated from large to small, which can quickly reach the preset required total charging power.

[0039] In an optional embodiment, the power generation module 1 is electrically connected with a battery module, the battery module includes a plurality of capacitor groups and a plurality of battery groups; the capacitor group is electrically connected with the power generation module 1, and the capacitor group is electrically connected with each battery group; the capacitor group and the battery group are electrically connected with the control module; the control module is configured to control the power generation module 1 to sequentially charge the capacitor group, charge the next capacitor group when one capacitor group is fully charged, and sequentially charge the battery group through the fully charged capacitor group when the capacitor group is fully charged.

[0040] In the embodiment, the capacitor group can use supercapacitors with high pulse discharge performance, which can be quickly charged and meet the demand of fast response, and thus can adapt to the adjustment of the total output power of the series-parallel connection of the power generation modules 1.

[0041] In the embodiment, the battery group can be retired power batteries or batch-produced energy storage special batteries, which can be regularly charged and discharged under the unified regulation of the system, and can delay the battery attenuation to the maximum extent.

[0042] In the embodiment, the capacitor group can be divided into B 1、B 2、 B 3...., the battery pack can be divided into A 1、 A 2、 A 3...., during charging, the power generation module 1 adjusted in series and parallel can first charge the capacitor group respectively, for example B 1after charging, charge B 2, and so on, and after B 1charging, the battery pack that needs to be charged can be charged by B 1.

[0043] In this embodiment, the preset required total charging power is PMax , the real-time output power of each power generation module 1 is PX , the real-time output power is sorted from large to small, and PX is accumulated to meet PMax , at this time, the accumulated PX corresponding power generation module 1 is connected in series.

[0044] In this embodiment, if all PX does not meet PMax , feedback the current state of power generation is normal, and the charging can be normally carried out, but the control module will issue a low charging efficiency prompt.

[0045] In an optional implementation, the control module is also electrically connected with a plurality of incremental modules, the incremental modules are also electrically connected with MPPT modules and solid-state relay modules; the incremental modules are connected in parallel with one of the series-connected power generation modules 1.

[0046] As shown in Figure 2 , in an optional implementation, the incremental module and the power generation module 1 each include a plurality of series-connected photovoltaic cell pieces 2.

[0047] In an optional implementation, the output voltages of the incremental module and the power generation module 1 are the same.

[0048] In this embodiment, the output voltages of the incremental module and the power generation module can be adjusted according to actual needs.

[0049] In this embodiment, each solid-state relay module can be integrated in a switching area, so that the solid-state relay modules are centrally arranged.

[0050] In this embodiment, as shown in Figure 3 , the photovoltaic cell piece 2 can be installed on the outer wall of the refrigerated vehicle compartment.

[0051] In the embodiment, if 10 power generation modules 1 are provided, 5 of which are at the maximum power point, the corresponding parameters are current 8A, voltage 30V, and the power of a single power generation module 1 is 240W; the other 5 are not at the maximum power point, the corresponding parameters are current 4A, weak light causes the current to drop, the voltage V is about 30V, and the power of a single power generation module 1 is 120W. If the conventional method is used, 5 power generation modules 1 are connected in series as a branch, and two branches are connected in parallel, each branch contains power generation modules 1 at the maximum power point and power generation modules 1 not at the maximum power point, resulting in a single branch power of 4A*150V=600W, and the total power after the two branches are connected in parallel is 1200W. In a single branch, because there are power generation modules 1 not at the maximum power point, the power generation modules 1 at the maximum power point need to work at 4A, resulting in power waste. In the embodiment, if the total required charging power is 1200W, 5 power generation modules 1 at the maximum power point can be directly connected in series to meet the demand of 1200W, and the other power generation modules 1 not at the maximum power point are connected in parallel to improve the charging capacity.

[0052] At least one other disclosed embodiment also provides a refrigerated truck, comprising: the dynamic photovoltaic power generation system described above, wherein the control module can be electrically connected with the refrigerated truck ECU .

[0053] At least one other disclosed embodiment also provides a working method of the dynamic photovoltaic power generation system described above, comprising: the control module obtains the real-time output power of each power generation module 1 every interval detection time, and controls the solid-state relay module of the corresponding power generation module 1 from high to low according to the real-time output power, so that the total output power of a plurality of power generation modules 1 connected in series meets the preset total required charging power, and the remaining power generation modules 1 are connected in parallel with one of the power generation modules 1 connected in series. MPPT

[0054] In summary, the dynamic photovoltaic power generation system comprises: a plurality of power generation modules 1, each of which is electrically connected with MPPT a solid-state relay module, and the power generation modules 1 are connected through the solid-state relay modules; the power generation modules 1, MPPT the solid-state relay modules and the control module are electrically connected; the control module is configured to obtain the real-time output power of each power generation module 1 every interval detection time, and control the solid-state relay module of the corresponding power generation module 1 from high to low according to the real-time output power, so that the total output power of a plurality of power generation modules 1 connected in series meets the preset total required charging power, and the remaining power generation modules 1 are connected in parallel with one of the power generation modules 1 connected in series. MPPT ​The module acquires the real-time output power of each power generation module 1 every interval detection time, and controls the solid-state relay module of the corresponding power generation module 1 from high to low according to the real-time output power, so that the total output power of a plurality of power generation modules 1 connected in series meets the preset required total charging power, and the remaining power generation modules 1 are connected in parallel with one of the power generation modules 1 connected in series, thereby realizing the adjustment of the series-parallel connection mode between the power generation modules 1 according to different requirements, and improving the charging capacity under the condition of meeting different charging requirements.

[0055] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, terms such as "first", "second" and other numerical terms are used herein, unless otherwise explicitly indicated herein. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0057] Spatially relative terms, such as "inner", "outer", "below", "below", "lower", "above", "upper", and the like, can be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the drawings. In addition to the orientation depicted in the drawings, the spatially relative terms can be intended to cover different orientations of the device in use or operation. For example, if the device in the drawing is turned over, the element described as "below" or "under" the other element or feature will be oriented "above" the other element or feature. Therefore, the example term "below" can cover the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0058] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A dynamic photovoltaic power generation system, characterized in that, include: Several power generation modules (1), each power generation module (1) is electrically connected to... MPPT The modules are connected to each other via solid-state relay modules; The power generation module (1) is installed on the outer wall of the refrigerated truck compartment; The power generation module (1) MPPT Both the module and the solid-state relay module are electrically connected to the control module; The control module is configured to, according to each MPPT The module acquires the real-time output power of each power generation module (1) at intervals of detection time, and controls the solid-state relay module of the corresponding power generation module (1) to work from high to low according to the real-time output power, so that the total output power of several power generation modules (1) connected in series meets the preset required total charging power, and the remaining power generation modules (1) are connected in parallel with one of the power generation modules (1) connected in series. The detection time is: T = α / n ； in, T For detection time; α Preset time; n The number of battery packs that need to be charged.

2. The dynamic photovoltaic power generation system as described in claim 1, characterized in that, The control module is configured to sequentially number all power generation modules (1), acquire the real-time output power of each power generation module (1) at intervals of detection time, and match the real-time output power of each power generation module (1) with its number, and sort the power generation modules (1) from largest to smallest according to their real-time output power.

3. The dynamic photovoltaic power generation system as described in claim 1, characterized in that, The power generation module (1) is electrically connected to the battery module, and the battery module includes: several capacitor groups and several battery groups; The capacitor bank is electrically connected to the power generation module (1), and the capacitor bank is electrically connected to each battery bank. The capacitor bank and the battery bank are electrically connected to the control module; The control module is configured to control the power generation module (1) to charge the capacitor bank sequentially, and to charge the next capacitor bank after one capacitor bank is fully charged, and to charge the battery bank sequentially through the fully charged capacitor bank after the capacitor bank is fully charged.

4. The dynamic photovoltaic power generation system as described in claim 3, characterized in that, The control module is also configured to accumulate the real-time output power from large to small according to the preset required total charging power. After the accumulated total output power meets the preset required total charging power, the corresponding power generation module (1) is connected in series, and the remaining other power generation modules (1) are connected in parallel with any of the series-connected power generation modules (1). If the total output power of all the power generation modules (1) connected in series is less than the preset total charging power, then the charging will be performed using the sum of the current real-time output power.

5. The dynamic photovoltaic power generation system as described in claim 1, characterized in that, The control module is also electrically connected to several incremental modules, and each incremental module is also electrically connected to a corresponding module. MPPT Modules and solid-state relay modules; The incremental module is connected in parallel with one of the power generation modules (1) connected in series.

6. The dynamic photovoltaic power generation system as described in claim 5, characterized in that, Both the incremental module and the power generation module (1) include several photovoltaic cells (2) connected in series.

7. The dynamic photovoltaic power generation system as described in claim 6, characterized in that, The output voltages of the incremental module and the power generation module (1) are the same.

8. A refrigerated truck, characterized in that, include: The dynamic photovoltaic power generation system as described in claim 1 is adopted.

9. A method for operating a dynamic photovoltaic power generation system as described in claim 1, characterized in that, include: The control module is based on each MPPT The module acquires the real-time output power of each power generation module (1) at intervals and controls the solid-state relay module of the corresponding power generation module (1) to work from high to low according to the real-time output power, so that the total output power of several power generation modules (1) connected in series meets the preset total charging power, and the remaining power generation modules (1) are connected in parallel with one of the power generation modules (1) connected in series.

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