Solar photovoltaic power generation energy storage system

Abstract

The invention relates to the technical field of photovoltaic power generation, and provides a solar photovoltaic power generation energy storage system, which comprises a photovoltaic power generation module, the photovoltaic power generation module is electrically connected with an inverter through a photovoltaic controller, the inverter is electrically connected with a switching device, and the switching device is electrically connected with an external power grid and an alternating current load; the energy storage battery module is electrically connected with the photovoltaic controller, and the energy storage battery module is electrically connected with the battery management module; the main control module is electrically connected with the photovoltaic controller, the inverter, the switching device, the battery management module and the display module; the energy storage battery module comprises a shell, a vertical partition plate and a plurality of horizontal partition plates, and an energy storage battery pack is arranged at the upper end of each horizontal partition plate; a first cooling fan is arranged between the horizontal partition plates located at the upper ends of the energy storage battery packs or the inner wall of the upper end of the shell, ventilation holes are formed in the vertical partition plates, and a ventilation mechanism is arranged on the left side wall of the shell. And the first cooling fan and the ventilation mechanism are matched for cooling, so that the cooling effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a solar photovoltaic power generation and energy storage system. Background Art

[0002] With the depletion of fossil energy and its serious impact on the environment, people are in urgent need of environmentally friendly renewable energy. At present, the existing renewable clean energy sources include hydropower, wind power and solar energy. Since solar energy is cleaner during use and is more widely distributed, solar power generation has received more and more attention.

[0003] Solar photovoltaic power generation and energy storage systems usually include energy storage devices. Existing energy storage devices, such as CN207320198U, a photovoltaic energy storage device, have the following problems: only ventilation holes are provided for ventilation and heat dissipation, and it is difficult to quickly cool down the battery when the battery temperature is high, which affects the battery life. Summary of the invention

[0004] The present invention provides a solar photovoltaic power generation and energy storage system to solve the technical problems of the prior art proposed in the above background technology.

[0005] In order to solve the above problems, the present invention discloses a solar photovoltaic power generation and energy storage system, comprising:

[0006] A photovoltaic power generation module, the photovoltaic power generation module is electrically connected to an inverter through a photovoltaic controller, the inverter is electrically connected to a switching device, and the switching device is electrically connected to an external power grid and an AC load;

[0007] The energy storage battery module is electrically connected to the photovoltaic controller, and the energy storage battery module is electrically connected to the battery management module;

[0008] The main control module is electrically connected to the photovoltaic controller, the inverter, the switching device, the battery management module, and the display module respectively;

[0009] The energy storage battery module includes: a shell, a vertical partition is arranged on the left side of the shell, a plurality of horizontal partitions are arranged between the right side of the vertical partition and the right inner wall of the shell at intervals, the horizontal partition is connected to the right side of the vertical partition and the inner wall of the shell, and an energy storage battery group is arranged on the upper end of each horizontal partition; a first cooling fan is arranged between the horizontal partition at the upper end of each energy storage battery group or the inner wall of the upper end of the shell, the vertical partition is provided with ventilation holes, and a ventilation mechanism is arranged on the left side wall of the shell.

[0010] Preferably, the energy storage battery module is electrically connected to the photovoltaic controller via a DC converter.

[0011] Preferably, the ventilation mechanism is a suction fan or a second heat dissipation fan.

[0012] Preferably, it also includes:

[0013] A region division module, used for dividing the interior of the housing into a plurality of first regions, each first region corresponding to a first cooling fan and an energy storage battery pack;

[0014] A first temperature detection module, each first area corresponds to a first temperature detection module, the first temperature detection module includes a plurality of first temperature detection units, and the first temperature detection unit is used to detect the surface temperature of the energy storage battery pack in the first area;

[0015] A second temperature detection module, each first area corresponds to a second temperature detection module, the first temperature detection module includes a plurality of second temperature detection units, and the second temperature detection unit is used to detect the ambient temperature of the first area where it is located;

[0016] A third temperature detection module, used to detect the ambient temperature outside the housing;

[0017] A first calculation module, used for calculating the current equivalent heat dissipation requirement of each first area;

[0018] A first determination module is used to determine a first working power of the ventilation mechanism based on an equivalent heat dissipation requirement of a first area with a maximum current equivalent heat dissipation requirement and a current detection result of a third temperature detection module;

[0019] The first control module is used to control the ventilation module to operate at a first operating power for continuous ventilation for a third set time period.

[0020] Preferably, the first calculation module calculates the current equivalent required heat dissipation of each first area based on the following formula:

[0021]

[0022] P i is the current equivalent heat dissipation required of the i-th first region; c is the specific heat capacity of the battery in the energy storage battery group (4); m is the mass of a single energy storage battery group; T i is the average detection value of the first temperature detection unit of the i-th first area within the current first set time; the ventilation mechanism and the first cooling fan are not working within the current first set time; T0 is the target operating temperature of the energy storage battery pack; T max is the maximum allowable operating temperature of the energy storage battery pack; T i1 The average detection value of the second temperature detection unit in the i-th first area within the current first set time period; lg is the logarithm with base 10; e is a natural constant; P i1 is the theoretical heating power of the energy storage battery pack in the current i-th first area within the second set time after the current first set time ends; t i For the i-th first region, T i the maximum permissible hours of work;

[0023] Preferably, it also includes:

[0024] A first wind speed detection module, each first area corresponds to a first wind speed detection module, the first wind speed detection module comprises a plurality of first wind speed detection units, and the first temperature detection unit is used to detect the wind speed at the location thereof; the first wind speed detection units are arranged on different surfaces of the energy storage battery pack (4);

[0025] A first acquisition module is used to obtain a first variation curve of the average wind speed of each first area as the power of the ventilation mechanism changes, wherein the abscissa of the first variation curve is the power of the ventilation mechanism, and the ordinate is the average wind speed of the first area; the average wind speed of each first area is an average detection value of the first wind speed detection unit of each first area within a fourth set time period when the ventilation mechanism works at the corresponding power;

[0026] The second determination module is used to obtain maxP i The target abscissa of the first variation curve of the corresponding first region having an average wind speed equal to the corresponding preset reference wind speed;

[0027] The first determination module calculates the first working power of the ventilation mechanism based on the following formula;

[0028]

[0029] P is the first working power of the ventilation mechanism; is maxP i The wind speed loss coefficient corresponding to the distance between the center of the corresponding first area and the distance between the outlet of the ventilation mechanism; σ is the specific heat capacity of air; T1 is the temperature before the air flows through the energy storage battery pack corresponding to the first area with the largest equivalent heat dissipation when the current ventilation mechanism works at the power corresponding to the target horizontal coordinate for the fourth set time; T2 is the temperature after the air flows through the energy storage battery pack corresponding to the first area with the largest equivalent heat dissipation when the current ventilation mechanism works at the power corresponding to the target horizontal coordinate for the fourth set time; for The corresponding first working power of the ventilation mechanism; ρ is the density of air; S is the surface area of ​​the energy storage battery pack; P0 is the basic equivalent heat dissipation required by the energy storage battery pack corresponding to the preset reference wind speed.

[0030] Preferably, the first control module controls the first temperature detection unit to perform multiple detections within a time period of 0.9 times the third set time length to the third set time length when the ventilation mechanism works at the first working power and ventilates; the time period of 0.9 times the third set time length to the third set time length is the target time period; the solar photovoltaic power generation and energy storage system also includes:

[0031] A first wind speed detection module, each first area corresponds to a first wind speed detection module, the first wind speed detection module includes a plurality of first wind speed detection units, and the first temperature detection unit is used to detect the wind speed at the location thereof; the first wind speed detection units are arranged on different surfaces of the energy storage battery pack;

[0032] A second calculation module, used for calculating the heat dissipation abnormality value of each first area based on the detection values ​​of the first temperature detection unit and the first wind speed unit within the target time period;

[0033]

[0034] D i is the abnormal heat dissipation value of the first region of the i-th region; B ij is the average detection value of the jth first temperature detection unit in the i-th first area within the target time period; T0 is the target operating temperature of the energy storage battery pack 4; B ih1 is the average value of the detection values ​​of the hth first wind speed detection unit in the i-th first area within the target time period; n i1 is the B in the first region i within the target time period ij The total number of first temperature detection units greater than T0; n i2 is the B in the first region i within the target time period ij The total number of first temperature detection units less than T0; B i0 is all B in the first region i within the target time period ij The standard deviation of i is the total number of first temperature detection units in the i-th first region; ε1 and ε2 are the first weight and the second weight respectively; ln is the natural logarithm, e is the natural constant; T1 is the unit temperature; θ0 is the unit wind speed; m i is the total number of first wind speed detection units in the i-th first area;

[0035] The third determination module is used to determine that the first area with a heat dissipation abnormality value greater than or equal to a preset abnormality value is an abnormal first area, and the first control module controls the first heat dissipation fan in the abnormal first area to work to dissipate heat in the abnormal first area.

[0036] Preferably, it also includes:

[0037] A fourth temperature detection module, used to detect the temperatures of different temperature detection points on the surface of the photovoltaic panel of the photovoltaic power generation module;

[0038] A fifth temperature detection module, used to detect the ambient temperature of the photovoltaic panel;

[0039] A second wind speed detection module is used to detect the ambient wind speed at the photovoltaic panel;

[0040] The third calculation module is used to calculate the current temperature stability coefficient of the current photovoltaic panel;

[0041] The first warning module issues a warning when the current temperature stability coefficient of the photovoltaic panel is greater than a preset temperature stability coefficient threshold;

[0042] The first collection module is used to collect the light intensity of the surface of the front photovoltaic panel that is exposed to sunlight;

[0043] A third calculation module is used to calculate the current theoretical power generation power Q of the current photovoltaic panel based on the current detection value of the first acquisition module, the current temperature stability coefficient, the current detection value of the fifth temperature detection module, and the current detection value of the second wind speed detection module when the first warning module does not warn;

[0044] The second acquisition module is used to acquire the current actual power generation of the current photovoltaic panel;

[0045] The second early warning module is used to generate an alarm when the ratio of the current actual power generation of the current photovoltaic panel to the current theoretical power generation of the current photovoltaic panel is less than a first preset ratio.

[0046] Compared with the prior art, the present invention has the following beneficial effects: the photovoltaic controller is used to output the power of the photovoltaic power generation module to the energy storage battery or the inverter; the inverter is used to convert the direct current from the photovoltaic power generation module or the energy storage battery into alternating current; the switching device is used to control the external power grid to supply power to the AC load, or to supply power to the AC load with the output power of the inverter;

[0047] When there are fewer energy storage battery groups working, the corresponding first cooling fan can be used to dissipate heat; when there are more energy storage battery groups working at the same time or the entire right side space of the vertical partition needs to be ventilated, the ventilation mechanism is started to achieve simultaneous heat dissipation of more energy storage battery groups;

[0048] The present invention solves the following problems raised by the background technology: existing energy storage devices, such as CN207320198U, a photovoltaic energy storage device, have the following problems: only ventilation holes are provided for ventilation and heat dissipation, and it is difficult to cool down quickly when the battery temperature is high, which affects the service life of the battery.

[0049] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0051] Figure 1 It is a schematic diagram of the logical structure of the system of the present invention;

[0052] Figure 2 It is a schematic structural diagram of the energy storage battery module of the present invention.

[0053] In the figure: 1. Shell; 2. Vertical partition; 3. Horizontal partition; 4. Energy storage battery pack; 5. First cooling fan; 6. Ventilation hole; 7. Ventilation mechanism. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0055] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0057] The present invention provides the following embodiments

[0058] Example 1

[0059] The embodiment of the present invention provides a solar photovoltaic power generation and energy storage system, such as Figure 1-Figure 2 As shown, including:

[0060] A photovoltaic power generation module, the photovoltaic power generation module is electrically connected to an inverter through a photovoltaic controller, the inverter is electrically connected to a switching device, and the switching device is electrically connected to an external power grid and an AC load;

[0061] The energy storage battery module is electrically connected to the photovoltaic controller, and the energy storage battery module is electrically connected to the battery management module;

[0062] The main control module is electrically connected to the photovoltaic controller, the inverter, the switching device, the battery management module, and the display module respectively;

[0063] The energy storage battery module includes: a shell 1, a vertical partition 2 is arranged on the left side of the shell 1, a plurality of horizontal partitions 3 are arranged between the right side of the vertical partition 2 and the right inner wall of the shell 1 at intervals, the horizontal partition 3 is connected to the right side of the vertical partition 2 and the inner wall of the shell 1, and an energy storage battery group 4 is arranged on the upper end of each horizontal partition 3; a first cooling fan 5 is arranged between the horizontal partition 3 at the upper end of each energy storage battery group 4 or the upper inner wall of the shell 1, the vertical partition 2 is provided with ventilation holes 6, and a ventilation mechanism 7 is arranged on the left side wall of the shell 1.

[0064] Preferably, the energy storage battery module is electrically connected to the photovoltaic controller via a DC converter.

[0065] Preferably, the ventilation mechanism 7 is a suction fan or a second heat dissipation fan.

[0066] The working principle and beneficial effects of the above technical solution are:

[0067] The photovoltaic controller is used to output the power of the photovoltaic power generation module to the energy storage battery or the inverter; the inverter is used to convert the direct current from the photovoltaic power generation module or the energy storage battery into alternating current; the switching device is used to control the external power grid to supply power to the AC load, or to supply power to the AC load with the output power of the inverter;

[0068] When there are fewer energy storage battery groups 4 in operation, the corresponding first cooling fan 5 can be used to dissipate heat; when there are more energy storage battery groups 4 in operation at the same time or the entire right side space of the vertical partition 2 needs to be ventilated, the ventilation mechanism is started to achieve simultaneous heat dissipation of more energy storage battery groups 4;

[0069] The present invention solves the following problems raised by the background technology: existing energy storage devices, such as CN207320198U, a photovoltaic energy storage device, have the following problems: only ventilation holes are provided for ventilation and heat dissipation, and it is difficult to cool down quickly when the battery temperature is high, which affects the service life of the battery.

[0070] Embodiment 2, based on embodiment 1, further comprises:

[0071] A region division module is used to divide the housing 1 into a plurality of first regions, each of which corresponds to a first cooling fan 5; and each of which is provided with a plurality of energy storage battery packs 4;

[0072] A first temperature detection module, each first area corresponds to a first temperature detection module, the first temperature detection module includes a plurality of first temperature detection units, and the first temperature detection unit is used to detect the surface temperature of the energy storage battery group 4 in the first area;

[0073] A second temperature detection module, each first area corresponds to a second temperature detection module, the first temperature detection module includes a plurality of second temperature detection units, and the second temperature detection unit is used to detect the ambient temperature of the first area where it is located;

[0074] A third temperature detection module, used to detect the ambient temperature outside the housing 1;

[0075] A first calculation module, used for calculating the current equivalent heat dissipation requirement of each first area;

[0076] A first determination module is used to determine the first working power of the ventilation mechanism based on the equivalent heat requirement of the first area with the largest current equivalent heat requirement and the current detection result of the third temperature detection module (it can be obtained based on a preset calculation model or based on the equivalent heat requirement of the first area with the largest current equivalent heat requirement - the current average detection value of the third temperature detection module - the first working power mapping table);

[0077] A first alarm module, configured to generate an alarm when the first operating power determined by the first determination module is greater than the maximum allowable power of the ventilation mechanism 7;

[0078] The first control module is used to control the ventilation module to operate at the first working power for continuous ventilation for a third set time when the first alarm module does not alarm. The third set time is executed after the first working power is calculated after the first set time, and the third set time is less than or equal to the second set time;

[0079] Preferably, the first calculation module calculates the current equivalent required heat dissipation of each first area based on the following formula:

[0080]

[0081] P i is the current equivalent heat dissipation required of the i-th first region; c is the specific heat capacity of the battery in the energy storage battery pack 4; m is the mass of a single energy storage battery pack 4; T i is the average detection value of the first temperature detection unit of the i-th first area within the current first set time; the ventilation mechanism 7 and the first cooling fan 5 are not working within the current first set time; T0 is the target operating temperature of the energy storage battery pack 4; T max is the maximum allowable operating temperature of the energy storage battery pack; T i1 The average detection value of the second temperature detection unit in the i-th first area within the current first set time period; lg is the logarithm with base 10; e is a natural constant; P i1 is the theoretical heating power of the energy storage battery group 4 in the current i-th first area within the second set time period after the current first set time period ends; t i For the i-th first region, T ithe maximum permissible hours of work;

[0082] The beneficial effects of the above technical solution are as follows: based on the material parameters of the energy storage battery pack 4 (specific heat capacity of the batteries in the energy storage battery pack 4; mass of a single energy storage battery pack), the working state parameters of the energy storage battery pack 4 (the average detection value of the first temperature detection unit of the i-th first area within the current first set time length), the working performance parameters of the energy storage battery pack (the target working temperature of the energy storage battery pack 4; the maximum allowable working temperature of the energy storage battery pack, the i-th first area with T i The maximum allowed working time); environmental parameters (the average detection value of the second temperature detection unit of the i-th first area within the current first set time), the predicted heating state of the battery pack (the theoretical heating power of the energy storage battery pack 4 of the i-th first area within the second set time after the current first set time ends), and the current equivalent heat dissipation required for each first area is calculated, and the calculation is reliable;

[0083] Then, the first working power of the ventilation mechanism is determined according to the equivalent heat dissipation required by the first area with the largest current equivalent heat dissipation required and the current detection result of the third temperature detection module; the appropriate first working power is determined to ensure that the ventilation effect of the ventilation mechanism in each first area meets the demand as much as possible, and to ensure that more first areas can meet the heat dissipation demand only through ventilation and heat dissipation of the ventilation mechanism 7, thereby reducing the use of the first heat dissipation fan;

[0084] Embodiment 3, based on Embodiment 2, further includes:

[0085] A first wind speed detection module, each first area corresponds to a first wind speed detection module, the first wind speed detection module includes a plurality of first wind speed detection units, and the first temperature detection unit is used to detect the wind speed at the location thereof; the first wind speed detection units are arranged on different surfaces of the energy storage battery pack 4;

[0086] A first acquisition module is used to obtain a first variation curve of the average wind speed of each first area as the power of the ventilation mechanism changes, wherein the abscissa of the first variation curve is the power of the ventilation mechanism, and the ordinate is the average wind speed of the first area; the average wind speed of each first area is an average detection value of the first wind speed detection unit of each first area within a fourth set time period when the ventilation mechanism works at the corresponding power;

[0087] The second determination module is used to obtain maxP i The target abscissa of the average wind speed in the first variation curve of the corresponding first region being equal to the corresponding preset reference wind speed;

[0088] The first determination module calculates the first working power of the ventilation mechanism 7 based on the following formula;

[0089]

[0090] P is the first working power of the ventilation mechanism 7; is maxP i The wind speed loss coefficient corresponding to the distance between the center of the corresponding first area and the distance between the outlet of the ventilation mechanism 7 (the value is greater than 0 and less than 1, which can be obtained based on the test); σ is the specific heat capacity of the air; T1 is the temperature before the air flows through the energy storage battery pack corresponding to the first area with the largest equivalent heat dissipation when the current ventilation mechanism 7 works at the power corresponding to the target horizontal coordinate for the fourth set time; T2 is the temperature after the air flows through the energy storage battery pack corresponding to the first area with the largest equivalent heat dissipation; for

[0091] The corresponding calculation result is the equivalent wind speed, is the first working power of the ventilation mechanism 7 corresponding to the theoretical working power of the ventilation mechanism 7 when the wind speed at the air outlet of the ventilation mechanism 7 is the equivalent wind speed; ρ is the density of air; S is the surface area of ​​the energy storage battery group 4; P0 is the basic equivalent heat dissipation requirement of the energy storage battery group 4 corresponding to the preset reference wind speed (the preset reference wind speed is the minimum wind speed at the corresponding energy storage battery group 4 that can meet the heat dissipation demand of the energy storage battery group 4 at the average value of the historical equivalent heat dissipation requirement (the equivalent heat dissipation requirement can be periodically calculated and stored based on the first calculation module, and the historical equivalent heat dissipation requirement can be obtained)).

[0092] The beneficial effects of the above technical solution are:

[0093] Get maxP i The average wind speed in the first change curve of the corresponding first area is equal to the target horizontal coordinate of the corresponding preset reference wind speed, and the ventilation mechanism 7 works at the power corresponding to the target horizontal coordinate for the third set time to obtain T1 and T2; based on maxP i , T1, T2, maxP i The first working power is calculated based on the wind speed loss coefficient corresponding to the distance between the center of the corresponding first area and the distance between the center of the ventilation mechanism 7 and the air outlet, and the parameters of the air (density and specific heat capacity of the air), and the appropriate first working power is determined to ensure that the ventilation mechanism can meet the ventilation effect in each first area as much as possible, and try to ensure that more first areas can meet the heat dissipation requirements only through ventilation and heat dissipation through the ventilation mechanism 7, thereby reducing the use of the first cooling fan.

[0094] Embodiment 4, on the basis of any one of Embodiments 2-3, the first control module controls the first temperature detection unit to perform multiple detections during a period of 0.9 times the third set time length to the third set time length when the ventilation mechanism 7 works at the first working power for ventilation (theoretically, each first area should reach or approach the target working temperature of the energy storage battery group 4 within the period of 0.9 times the third set time length to the third set time length); the period of 0.9 times the third set time length to the third set time length is the target period; the solar photovoltaic power generation and energy storage system also includes:

[0095] A first wind speed detection module, each first area corresponds to a first wind speed detection module, the first wind speed detection module includes a plurality of first wind speed detection units, and the first temperature detection unit is used to detect the wind speed at the location thereof; the first wind speed detection units are arranged on different surfaces of the energy storage battery pack 4;

[0096] A second calculation module, used for calculating the heat dissipation abnormality value of each first area based on the detection values ​​of the first temperature detection unit and the first wind speed unit within the target time period;

[0097]

[0098] D i is the abnormal heat dissipation value of the first region of the i-th region; B ij is the average detection value of the jth first temperature detection unit in the i-th first area within the target time period; T0 is the target operating temperature of the energy storage battery pack 4; B ih1 is the average value of the detection values ​​of the hth first wind speed detection unit in the i-th first area within the target time period; n i1 is the B in the first region i within the target time period ij The total number of first temperature detection units greater than T0; n i2 is the B in the first region i within the target time period ij The total number of first temperature detection units less than T0; B i0 is all B in the first region i within the target time period ij The standard deviation of i is the total number of first temperature detection units in the i-th first region; ε1 and ε2 are the first weight and the second weight respectively (both are greater than 0 and less than 1); ln is the natural logarithm, e is the natural constant; T1 is the unit temperature; θ0 is the unit wind speed; m i is the total number of first wind speed detection units in the i-th first area;

[0099] The third determination module is used to determine that the first area where the heat dissipation abnormality value is greater than or equal to the preset abnormality value is the abnormal first area, and the first control module controls the first heat dissipation fan 5 in the abnormal first area to work to dissipate heat in the abnormal first area.i The first abnormal area needs to compensate the heat dissipation Based on the heat dissipation to be compensated, the cooling fan in the abnormal first area is controlled to work; T i1 ' is the average detection value of the second temperature detection unit within the target time period;

[0100] The beneficial effects of the above technical solution are: based on the detection values ​​of the first temperature detection unit and the first wind speed unit in the target time period, the heat dissipation abnormality value of each first area is calculated, and the heat dissipation abnormality state of each first area in the target time period is obtained. Based on the average surface temperature state of the energy storage battery group 4 in the first area The surface temperature distribution of the energy storage battery pack 4 is abnormal (B i0 ), Energy storage battery pack 4 Environmental wind speed status The calculation of the abnormal heat dissipation state of each first area is reliable;

[0101] The third determination module is used to determine that the first area whose heat dissipation abnormality value is greater than or equal to the preset abnormality value is an abnormal first area, and the first control module controls the first cooling fan 5 in the abnormal first area to work to dissipate heat for the abnormal first area, thereby ensuring that each first area can dissipate heat reliably.

[0102] Embodiment 5, based on any one of Embodiments 1-4, further comprises:

[0103] A fourth temperature detection module, used to detect the temperatures of different temperature detection points on the surface of the photovoltaic panel of the photovoltaic power generation module;

[0104] A fifth temperature detection module, used to detect the ambient temperature of the photovoltaic panel;

[0105] A second wind speed detection module is used to detect the ambient wind speed at the photovoltaic panel;

[0106] The third calculation module is used to calculate the current temperature stability coefficient of the current photovoltaic panel;

[0107]

[0108] C is the current temperature stability coefficient of the current photovoltaic panel, C s is the current average detection value of the temperature at different temperature detection points on the current photovoltaic panel surface; C s1 is the current maximum detected value of the temperature at different temperature detection points on the current photovoltaic panel surface; C s2 The current minimum detection value of the temperature at different temperature detection points on the current photovoltaic panel surface; are the first state evaluation weight and the second state evaluation weight (the value is greater than 0 and less than 1); C s3 The standard deviation of the current detection values ​​of the temperature at different temperature detection points on the current photovoltaic panel surface;

[0109] The first warning module issues a warning when the current temperature stability coefficient of the photovoltaic panel is greater than a preset temperature stability coefficient threshold;

[0110] The first collection module is used to collect the light intensity of the surface of the front photovoltaic panel that is exposed to sunlight;

[0111] A third calculation module is used to calculate the current theoretical power generation power Q of the current photovoltaic panel based on the current detection value of the first acquisition module, the current temperature stability coefficient, the current detection value of the fifth temperature detection module, and the current detection value of the second wind speed detection module when the first warning module does not warn;

[0112]

[0113] A is the light intensity of the surface of the photovoltaic panel currently exposed to sunlight; S is the area of ​​the surface of the photovoltaic panel currently exposed to sunlight; τ is the photoelectric conversion efficiency corresponding to the current use time of the photovoltaic panel; To combine C s , C, C0, The corresponding power adjustment coefficient obtained (can be based on a preset function or Mapping table acquisition); C0 is the current detection value of the fifth temperature detection module; is the current detection value of the second wind speed detection module;

[0114] The second acquisition module is used to acquire the current actual power generation of the current photovoltaic panel;

[0115] The second early warning module is used to generate an alarm when the ratio of the current actual power generation of the current photovoltaic panel to the current theoretical power generation of the current photovoltaic panel is less than a first preset ratio.

[0116] The above technical solution is: obtaining the temperature stability coefficient of the current photovoltaic panel, and when the temperature stability coefficient of the current photovoltaic panel is greater than the preset temperature stability coefficient threshold, issuing an early warning to remind that the surface temperature stability of the photovoltaic panel is abnormal and needs to be repaired;

[0117] When the first early warning module does not issue an early warning, the current actual power generation of the current photovoltaic panel is calculated based on the current temperature stability coefficient of the photovoltaic panel, the current ambient temperature, the current ambient wind speed, the current average detection value of the temperature of different temperature detection points on the current photovoltaic panel surface, the light intensity of the current photovoltaic panel surface that receives sunlight, the area of ​​the current photovoltaic panel surface that receives sunlight, and the photoelectric conversion efficiency corresponding to the current usage time of the photovoltaic panel. When the ratio of the current actual power generation of the current photovoltaic panel to the current theoretical power generation of the current photovoltaic panel is less than the first preset ratio, an alarm is issued to remind the user that the power generation efficiency of the photovoltaic panel is abnormal and to remind the user to inspect the photovoltaic panel to ensure the reliable use of the photovoltaic panel.

[0118] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A solar photovoltaic power generation and energy storage system, characterized in that: include: A photovoltaic power generation module, the photovoltaic power generation module is electrically connected to an inverter through a photovoltaic controller, the inverter is electrically connected to a switching device, and the switching device is electrically connected to an external power grid and an AC load; The energy storage battery module is electrically connected to the photovoltaic controller, and the energy storage battery module is electrically connected to the battery management module; The main control module is electrically connected to the photovoltaic controller, the inverter, the switching device, the battery management module, and the display module respectively; The energy storage battery module comprises: a shell (1), a vertical partition (2) is arranged on the left side of the shell (1), a plurality of horizontal partitions (3) are arranged between the right side of the vertical partition (2) and the right side inner wall of the shell (1) at intervals, the horizontal partition (3) is connected to the right side of the vertical partition (2) and the inner wall of the shell (1), and an energy storage battery group (4) is arranged on the upper end of each horizontal partition (3); a first heat dissipation fan (5) is arranged between the horizontal partition (3) at the upper end of each energy storage battery group (4) or the upper inner wall of the shell (1), the vertical partition (2) is provided with a ventilation hole (6), and a ventilation mechanism (7) is arranged on the left side wall of the shell (1).

2. A solar photovoltaic power generation and energy storage system according to claim 1, characterized in that: The energy storage battery module is electrically connected to the photovoltaic controller through a DC converter.

3. A solar photovoltaic power generation and energy storage system according to claim 1, characterized in that: The ventilation mechanism (7) is a suction fan or a second heat dissipation fan.

4. A solar photovoltaic power generation and energy storage system according to claim 1, characterized in that: Also includes: An area division module, used for dividing the interior of the housing (1) into a plurality of first areas, each first area corresponding to a first cooling fan (5) and an energy storage battery pack (4); A first temperature detection module, each first area corresponds to a first temperature detection module, The first temperature detection module comprises a plurality of first temperature detection units, the first temperature detection units being used to detect the surface temperature of the energy storage battery group (4) in the first area; A second temperature detection module, each first area corresponds to a second temperature detection module, the first temperature detection module includes a plurality of second temperature detection units, and the second temperature detection unit is used to detect the ambient temperature of the first area where it is located; A third temperature detection module, used for detecting the ambient temperature outside the housing (1); A first calculation module, used for calculating the current equivalent heat dissipation requirement of each first area; A first determination module is used to determine a first working power of the ventilation mechanism based on an equivalent heat dissipation requirement of a first area with a maximum current equivalent heat dissipation requirement and a current detection result of a third temperature detection module; The first control module is used to control the ventilation module to operate at a first operating power for continuous ventilation for a third set time period.

5. A solar photovoltaic power generation and energy storage system according to claim 4, characterized in that: The first calculation module calculates the current equivalent heat dissipation requirement of each first area based on the following formula; P i is the current equivalent heat dissipation required of the i-th first region; c is the specific heat capacity of the battery in the energy storage battery group (4); m is the mass of a single energy storage battery group; T i is the average detection value of the first temperature detection unit in the i-th first area within the current first set time period; the ventilation mechanism (7) and the first cooling fan (5) are not working within the current first set time period; T0 is the target operating temperature of the energy storage battery pack (4); T max is the maximum allowable operating temperature of the energy storage battery pack; T i1 The average detection value of the second temperature detection unit in the i-th first area within the current first set time period; lg is the logarithm with base 10; e is a natural constant; P i1 is the theoretical heating power of the energy storage battery group (4) in the i-th first area within the second set time period after the current first set time period ends; t i For the i-th first region, T i The maximum permissible time for work.

6. A solar photovoltaic power generation and energy storage system according to claim 4, characterized in that: Also includes: A first wind speed detection module, each first area corresponds to a first wind speed detection module, the first wind speed detection module comprises a plurality of first wind speed detection units, and the first temperature detection unit is used to detect the wind speed at the location thereof; the first wind speed detection units are arranged on different surfaces of the energy storage battery pack (4); A first acquisition module is used to acquire a first variation curve of the average wind speed of each first area as the power of the ventilation mechanism (7) changes, wherein the abscissa of the first variation curve is the power of the ventilation mechanism (7) and the ordinate is the average wind speed of the first area; the average wind speed of each first area is an average detection value of a first wind speed detection unit of each first area within a fourth set time period when the ventilation mechanism (7) works at a corresponding power; The second determination module is used to obtain maxP i The target abscissa of the first variation curve of the corresponding first region having an average wind speed equal to the corresponding preset reference wind speed; The first determination module calculates the first working power of the ventilation mechanism (7) based on the following formula; P is the first working power of the ventilation mechanism (7); is maxP i The wind speed loss coefficient corresponding to the distance between the center of the corresponding first area and the distance between the outlet of the ventilation mechanism (7); σ is the specific heat capacity of air; T1 is the temperature before the air flows through the energy storage battery group corresponding to the first area with the largest equivalent heat dissipation required at the fourth set time when the current ventilation mechanism (7) works at the power corresponding to the target horizontal coordinate; T2 is the temperature after the air flows through the energy storage battery group (4) corresponding to the first area with the largest equivalent heat dissipation required at the fourth set time when the current ventilation mechanism (7) works at the power corresponding to the target horizontal coordinate; for The first working power of the corresponding ventilation mechanism (7); ρ is the density of air; S is the surface area of ​​the energy storage battery group (4); P0 is the basic equivalent heat dissipation required by the energy storage battery group (4) corresponding to the preset reference wind speed.

7. A solar photovoltaic power generation and energy storage system according to claim 4, characterized in that: The first control module controls the first temperature detection unit to perform multiple detections during a time period from 0.9 times the third set time length to the third set time length when the ventilation mechanism (7) works at the first working power and ventilation; the time period from 0.9 times the third set time length to the third set time length is the target time period; the solar photovoltaic power generation and energy storage system also includes: A first wind speed detection module, each first area corresponds to a first wind speed detection module, the first wind speed detection module comprises a plurality of first wind speed detection units, and the first temperature detection unit is used to detect the wind speed at the location thereof; the first wind speed detection units are arranged on different surfaces of the energy storage battery pack (4); A second calculation module, used for calculating the heat dissipation abnormality value of each first area based on the detection values ​​of the first temperature detection unit and the first wind speed unit within the target time period; D i is the abnormal heat dissipation value of the first region of the i-th region; B ij is the average detection value of the jth first temperature detection unit in the i-th first area within the target time period; T0 is the target operating temperature of the energy storage battery pack 4; B ih1 is the average value of the detection values ​​of the hth first wind speed detection unit in the i-th first area within the target time period; n i1 is the B in the first region i within the target time period ij The total number of first temperature detection units greater than T0; n i2 is the B in the first region i within the target time period ij The total number of first temperature detection units less than T0; B i0 is all B in the first region i within the target time period ij The standard deviation of i is the total number of first temperature detection units in the i-th first region; ε1 and ε2 are the first weight and the second weight respectively; ln is the natural logarithm, e is the natural constant; T1 is the unit temperature; θ0 is the unit wind speed; m i is the total number of first wind speed detection units in the i-th first area; The third determination module is used to determine that a first area with a heat dissipation abnormality value greater than or equal to a preset abnormality value is an abnormal first area, and the first control module controls a first heat dissipation fan (5) in the abnormal first area to operate to dissipate heat from the abnormal first area.

8. A solar photovoltaic power generation and energy storage system according to claim 1, characterized in that: Also includes: A fourth temperature detection module, used to detect the temperatures of different temperature detection points on the surface of the photovoltaic panel of the photovoltaic power generation module; A fifth temperature detection module, used to detect the ambient temperature of the photovoltaic panel; A second wind speed detection module is used to detect the ambient wind speed at the photovoltaic panel; The third calculation module is used to calculate the current temperature stability coefficient of the current photovoltaic panel; The first warning module issues a warning when the current temperature stability coefficient of the photovoltaic panel is greater than a preset temperature stability coefficient threshold; The first collection module is used to collect the light intensity of the surface of the front photovoltaic panel that is exposed to sunlight; A third calculation module is used to calculate the current theoretical power generation power Q of the current photovoltaic panel based on the current detection value of the first acquisition module, the current temperature stability coefficient, the current detection value of the fifth temperature detection module, and the current detection value of the second wind speed detection module when the first warning module does not warn; The second acquisition module is used to acquire the current actual power generation of the current photovoltaic panel; The second early warning module is used to generate an alarm when the ratio of the current actual power generation of the current photovoltaic panel to the current theoretical power generation of the current photovoltaic panel is less than a first preset ratio.

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