Photovoltaic synergistic-air-cooled heat dissipation energy storage container and heat dissipation management method thereof

Abstract

The application relates to the technical field of new energy storage systems, and discloses a photovoltaic cooperative-air-cooled heat dissipation energy storage container and a heat dissipation management method thereof. The container comprises an energy storage box body and a foldable photovoltaic array arranged on the top of the energy storage box body. The container is divided into a control compartment and an energy storage compartment. The energy storage compartment is provided with energy storage units through a support. The support is respectively provided with an air outlet space and an air return space. The air outlet space is provided with an air outlet guide plate with a flat top surface and an inclined bottom surface. The air return space is provided with an air return guide plate with an inclined top surface and a flat bottom surface. The heat dissipation management method comprises the following steps: collecting environmental structure, photovoltaic array and energy storage parameters, calculating priority weight and dividing low / middle / high heat dissipation levels, executing corresponding air-cooled system strategies and photovoltaic cooperative strategies, and performing a correction step after the strategy execution. The application helps to optimize the space layout of the energy storage compartment, improve the air circulation efficiency, reduce the heat dissipation energy consumption, realize the cooperation of photovoltaic shading and power supply, and improve the operation benefit of the energy storage system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy storage systems, in particular to a photovoltaic cooperative-air cooling heat dissipation energy storage container and a heat dissipation management method thereof. BACKGROUND

[0002] Energy storage power stations are often used as outdoor power supply equipment with high integration degree, strong mobility and flexible deployment. Since they need to be exposed to the open air for a long time, the container not only directly absorbs the heat from the outside environment, but also releases a large amount of heat during the charging and discharging of the energy storage batteries inside. Therefore, the container needs to be specially designed with a wind channel structure to timely discharge the accumulated heat.

[0003] The ventilation channel of the traditional energy storage container has the problem of high space occupancy rate, and the internal space ratio can reach more than 15%, which directly compresses the effective placement space of the energy storage batteries, thereby causing a significant decrease in the air circulation efficiency inside the container. This decrease in efficiency mainly manifests in two aspects: first, the uneven distribution of cold air flow leads to a large temperature difference between the battery clusters, thereby limiting the battery arrangement density; second, the airflow flow path is blocked, and the internal airflow is difficult to enter the return air channel, directly increasing the energy consumption burden of the heat dissipation system.

[0004] The cooling system of the energy storage power station needs to rely on its own energy storage resources to drive operation. Research data shows that the cooling and heat dissipation energy consumption of the current energy storage power station accounts for more than 18% of the total energy consumption of the energy storage system. The high heat dissipation energy consumption directly weakens the operation efficiency of the energy storage power station, and the cause of the problem is not only related to the internal wind channel structure defect of the container described above, but also closely related to the unreasonable control logic of the heat dissipation system.

[0005] In the prior art, the heat dissipation control logic of the energy storage container mostly adopts a fixed threshold control mode, and mainly adopts a one-way control mode of "monitoring-execution", which cannot execute a reverse correction strategy according to the actual heat dissipation effect (such as the battery temperature uniformity, air velocity of the ventilation port, and other key indicators). Such control logic lacks flexibility and is difficult to dynamically adapt to changes in the external environment and fluctuations in internal working conditions, resulting in the heat dissipation system always being in a non-optimal operating state. SUMMARY

[0006] In a first aspect, the present application provides a photovoltaic cooperative-air cooling heat dissipation energy storage container.

[0007] The technical solution of the present application is as follows:

[0008] A photovoltaic cooperative-air cooling heat dissipation energy storage container, comprising an energy storage container body and a photovoltaic array arranged on the top of the energy storage container body; the energy storage container body has a control compartment and an energy storage compartment inside, the energy storage compartment is arranged with each energy storage unit through a plurality of groups of supports,

[0009] The lower and upper parts of the bracket are respectively configured as an air outlet space and an air return space;

[0010] The air outlet space is provided with an air outlet guide plate, which is configured as a cavity structure with a flat top surface and an inclined bottom surface, so that the air outlet guide plate forms a low side and a high side at the middle and edges of the energy storage container respectively; the high side of the air outlet guide plate is provided with an air inlet channel for cold air to pass through, and the top surface of the air outlet guide plate is provided with an airflow driving member;

[0011] The air return space is provided with an air return guide plate, which is configured as a cavity structure with an inclined top surface and a flat bottom surface, so that the air return guide plate forms a high side and a low side at the middle and edges of the energy storage container respectively, and the high side of the air return guide plate leads to an air return channel, and the other end of the air return channel is connected to the high side of the air outlet guide plate.

[0012] Further, the photovoltaic array includes upper, middle and lower photovoltaic panels, and the photovoltaic array is unfolded or stored through a folding mechanism;

[0013] The folding mechanism includes:

[0014] A support frame having a frame body and fixed support columns and adjustable support columns respectively arranged at the front side and rear side of the frame body; the middle photovoltaic panel is fixed in the frame body;

[0015] A front wheel shaft rotatably arranged at the top of the front side of the frame body and fixedly connected with the lower photovoltaic panel;

[0016] A rear wheel shaft rotatably arranged at the top of the rear side of the frame body and fixedly connected with the upper photovoltaic panel;

[0017] A transmission mechanism arranged at the side of the frame body and used to drive the front wheel shaft and the rear wheel shaft to rotate synchronously.

[0018] Further, the air outlet guide plate includes two groups of air outlet guide parts arranged at intervals, and the two groups of air outlet guide parts are connected through a connecting cavity at the high side of the air outlet guide plate;

[0019] The air outlet guide part includes a first air outlet guide unit, a second air outlet guide unit and a third air outlet guide unit with horizontally connected top parts and inclined and stacked bottom parts; the first air outlet guide unit, the second air outlet guide unit and the third air outlet guide unit are provided with air outlets at the top parts, and the air outlets are provided with airflow driving members inside.

[0020] Further, the air return guide plate includes two groups of air return guide parts arranged at intervals, and the two groups of air return guide parts are connected through a connecting cavity at the high side of the air return guide plate;

[0021] The return air guide part comprises a top inclined layer stack, a first return air guide unit with a bottom horizontal joint, a second return air guide unit, and a third return air guide unit; the first return air guide unit, the second return air guide unit, and the third return air guide unit are provided with return air inlets at the bottom.

[0022] Further, the number of the supports is two groups, each group of supports is aligned with a group of return air guide parts and a group of air outlet guide parts from top to bottom, and the top of the energy storage unit in the uppermost layer of the supports is provided with an air flow driving member.

[0023] Further, the high side of the return air guide plate is connected to the inlet of the return air channel through a four-way pipe, and the other two pipe openings of the four-way pipe are respectively provided with an electrically operated ventilation valve and an electrically operated dehumidification valve.

[0024] The return air channel is arranged between the two groups of supports.

[0025] In a second aspect, a heat dissipation management method of a photovoltaic cooperative-air cooling heat dissipation energy storage container is designed according to the above energy storage container, and the method comprises the following steps:

[0026] Step one: collecting parameters, including environmental structure parameters, photovoltaic array parameters, and energy storage parameters;

[0027] Step two: calculating the heat dissipation priority weight according to the priority weight calculation formula, and dividing the heat dissipation level into low demand, medium demand, and high demand according to the priority weight; the priority weight calculation formula is as follows:

[0028]

[0029] In the formula, represents the temperature gradient of the energy storage unit in each column along the vertical direction of the support, RH pack represents the humidity of the energy storage unit in each column along the vertical direction of the support, P pv represents the real-time output power of the photovoltaic array, V wind represents the real-time wind speed;

[0030] Step three: further judging whether the collected parameters meet the judgment condition of the current heat dissipation level according to the heat dissipation level, if yes, executing the air cooling system strategy and the photovoltaic cooperative strategy; if not, not executing.

[0031] Further, the environmental structure parameters include: the longitude and latitude of the energy storage container, the solar radiation intensity, the 24-hour forecast wind speed, wind direction, temperature, humidity, the temperature at the top of the container body, the real-time wind speed, and the angle between the photovoltaic array expansion surface and the sun;

[0032] ​The photovoltaic array parameters include: photovoltaic output voltage, output current, real-time output power, and the optimal tilt angle of the photovoltaic panel after it is unfolded;

[0033] The energy storage parameters include: the average temperature of each column of energy storage units along the vertical support, the PACK temperature, humidity and temperature gradient, the air conditioning power connected to the air inlet channel, the air outlet wind speed, and the on / off status of the electric ventilation valve and the electric dehumidification valve.

[0034] Furthermore, heat dissipation management methods also include:

[0035] Step 4: Collect reference indicators after implementing the air-cooled system strategy and the photovoltaic synergy strategy. If the reference indicators exceed the deviation setting range, execute the correction strategy. The reference indicators include the energy storage side change rate, Change value RH pack Change value, air outlet wind speed V duct Air conditioner inverter power P ac Actual tilt angle of the photovoltaic array.

[0036] Furthermore, in steps two and three, when 0 ≤ Q When the value is less than 3, the corresponding heat dissipation level is low demand. The further criterion for determining the low demand heat dissipation level is the average temperature of the energy storage unit. T avg ≤25 ℃ and ΔT≤2 ℃ and RH pack ≤50%; The strategy for air-cooled systems with low heat dissipation requirements is as follows: stop air intake through the air intake channel, open the electric ventilation valve, close the electric dehumidification valve, and the top of the energy storage unit on the uppermost layer of the support is equipped with an airflow drive component that operates at low speed; The strategy for photovoltaic systems with low heat dissipation requirements is as follows: the photovoltaic array is deployed, the adjustable support column adjusts the photovoltaic array to the optimal tilt angle, and the photovoltaic array prioritizes power supply to the energy storage unit.

[0037] When 3≤ Q When the temperature is below 7°C, the corresponding heat dissipation level is medium demand. A further criterion for determining medium demand heat dissipation level is that the temperature is below 25°C. T avg ≤35 ℃ or 2 ℃<Δ T ≤4℃ or 50% < RH pack ≤60%; The strategy for air-cooled systems with medium heat dissipation requirements is as follows: medium-speed air intake in the air intake channel, closing the electric ventilation valve, opening the electric dehumidification valve, and the top of the energy storage unit on the bracket is equipped with an airflow drive component that operates at medium speed; The strategy for photovoltaic systems with medium heat dissipation requirements is as follows: the photovoltaic array is deployed, the adjustable support column adjusts the photovoltaic array to the optimal tilt angle, the photovoltaic array prioritizes powering the air supply equipment connected to the air intake channel, and the remaining power is supplied to the energy storage unit;

[0038] When 7≤ Q ≤10, the corresponding heat dissipation level is high demand, and the further determination condition of the high demand heat dissipation level is T avg >35℃ or ΔT>4℃ or RH pack >60%; the air cooling system strategy of the high demand heat dissipation level is: high-speed air inlet of the air inlet channel, closing the electric ventilation valve, opening the electric dehumidification valve, and the top of the energy storage unit of the support uppermost layer is provided with an airflow driving member running at high speed; the photovoltaic system strategy of the high demand heat dissipation level is: the photovoltaic array is unfolded, the adjustable support column adjusts the photovoltaic array to the optimal inclination angle, the photovoltaic array preferentially supplies power to the air supply equipment connected to the air inlet channel, and the remaining power is supplied to the energy storage unit.

[0039] Due to the adoption of the above technical solutions, the application has the following beneficial effects:

[0040] 1. The main purpose of airflow management is to prevent the recirculation of hot air and reduce the flow bypass of cold air after supply. In the present application, the cold air is supplied to the energy storage bin through the air inlet channel, and the cold air flows to the air outlet hole in the form of acceleration through the inclined bottom surface of the air outlet guide plate, and the airflow flows upward through each layer of energy storage unit. At the same time, the airflow driving member at the top of the support rotates to accelerate and guide the top hot air, so that the top hot air enters the air return hole and then enters the air return channel, and at the same time, it helps the airflow below to flow upward. Based on the above, the airflow circulation path of the present application is single, and the overhead layout of the support can avoid uneven temperature distribution caused by energy accumulation. The energy storage bin with uniform temperature can reduce the heat difference between each part, thereby reducing the cold air flow bypass and achieving positive feedback.

[0041] 2. In the airflow circulation path, the present application specially designs the structure of the air outlet guide plate and the air return guide plate. The advantage of using a cavity with varying height is that in the air outlet guide plate, the airflow with speed in the air inlet channel is pushed by the airflow behind when passing through the narrow cavity, which has an acceleration effect, which helps the bottom airflow to "spray out" upward; in the air return guide plate, the airflow with speed at the air return port has a deceleration effect when entering the wider cavity, which is more easily "sucked in" by the air return channel, enhancing the circulation effect. For the air return channel, the lower end of the air return channel is connected to the wide side of the air outlet guide plate, and the wide side also makes the airflow enter the area, which has a fast flow rate, low pressure and low temperature, which helps the hot air in the air return channel to flow in, enhancing the airflow circulation effect.

[0042] 3. The present application optimizes the spatial layout of the energy storage bin through overhead layout and guide plate design, integrates the air outlet guide plate and the air return guide plate at the bottom and the top of the energy storage bin, which not only helps the airflow to cover the whole bin and realize the regular flow from bottom to top, but also fully utilizes the space of the energy storage bin, avoiding the accumulation of heat in the narrow space caused by the too close distance between the energy storage unit and the energy storage bin wall.

[0043] 4. The application adopts a folding structure to control the folding storage of the photovoltaic array. The foldable photovoltaic array can block sunlight while generating electricity, reducing the direct sunlight of the energy storage box. The unfolded photovoltaic array has a larger area and can block multiple surfaces of the energy storage box, further improving the sun-shading effect and power generation capacity.

[0044] 5. The application establishes a heat dissipation management method based on the photovoltaic synergy-wind cooling heat dissipation energy storage container. By calculating the heat dissipation priority weight and formulating low, medium and high demand strategies, the synergy of the photovoltaic array and the heat dissipation system is realized, ensuring energy storage in low demand and improving heat dissipation in high demand. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings described herein are used to provide further understanding of the application, and form a part of the application. The schematic embodiments of the application and their descriptions are used to explain the application, and do not constitute an improper limitation on the application.

[0046] Figure 1 A photovoltaic synergy-wind cooling heat dissipation energy storage container structure schematic diagram is provided for the application;

[0047] Figure 2 An explosion view of the photovoltaic synergy-wind cooling heat dissipation energy storage container structure is provided for the application;

[0048] Figure 3 An internal ventilation diagram of the photovoltaic synergy-wind cooling heat dissipation energy storage container is provided for the application;

[0049] Figure 4 A top view of the air outlet guide plate in the embodiment of the application;

[0050] Figure 5 A side view of the air outlet guide plate in the embodiment of the application;

[0051] Figure 6 A side view of the air return guide plate in the embodiment of the application;

[0052] Figure 7 A combination diagram of the air return guide plate, the air outlet guide plate and the air return channel in the embodiment of the application;

[0053] Figure 8 A side view of the folding mechanism in the embodiment of the application;

[0054] Figure 9 A side view of the folding structure in the embodiment of the application is enlarged locally;

[0055] Figure 10 A top view of the photovoltaic array in the embodiment of the application;

[0056] Figure 11The top of the uppermost energy storage unit of the support in the embodiment of the present application is provided with an airflow driving member schematic diagram;

[0057] In the drawings:

[0058] 1, energy storage box; 2, photovoltaic array; 3, support; 4, energy storage unit; 5, air outlet guide plate; 5-1, air outlet guide part; 5-2, connecting cavity; 5-3, first air outlet guide unit; 5-4, second air outlet guide unit; 5-5, third air outlet guide unit; 5-6, air outlet; 6, air return guide plate; 6-1, air return guide part; 6-2, air return; 6-3, first air return guide unit; 6-4, second air return guide unit; 6-5, third air return guide unit; 7, air inlet channel; 8, airflow driving member; 9, air return channel; 10, upper photovoltaic panel; 11, middle photovoltaic panel; 12, lower photovoltaic panel; 13, support frame; 13-1, fixed support column; 13-2, adjustable support column; 13-3, frame; 14, front axle; 15, rear axle; 16, transmission mechanism; 17, four-way pipe; 18, electrically operated air valve; 19, electrically operated dehumidification valve; 20, servo motor. DETAILED DESCRIPTION

[0059] Based on the background art, the present application provides a photovoltaic synergistic-air cooling heat dissipation energy storage container, which comprises an energy storage box 1 and a photovoltaic array 2 arranged on the top of the energy storage box 1; the energy storage box 1 has a control bin and an energy storage bin inside, and the energy storage bin is arranged with energy storage units 4 through a plurality of groups of supports 3; the lower and upper parts of the support 3 are respectively configured as an air outlet space and an air return space;

[0060] The air outlet space is provided with an air outlet guide plate 5, which is configured as a cavity structure with a flat top surface and an inclined bottom surface, so as to form a low side and a high side at the middle and edge of the energy storage container respectively; the high side of the air outlet guide plate 5 is provided with an air inlet channel 7 communicating with the outside, and the top surface of the air outlet guide plate 5 is provided with an airflow driving member 8;

[0061] The air return space is provided with an air return guide plate 6, which is configured as a cavity structure with an inclined top surface and a flat bottom surface, so as to form a high side and a low side at the middle and edge of the energy storage container respectively; the high side of the air return guide plate 6 leads to an air return channel 9, and the other end of the air return channel 9 communicates with the high side of the air outlet guide plate 5.

[0062] In the present application, as shown in the accompanying Figure 1 Figure 3 ​As shown, the support frame 3 supports the energy storage units 4 to form an overhead layout, and the space below the support frame 3 is an air outlet space, and the space above the support frame 3 is an air return space. In a specific implementation, the energy storage box 1 adopts a 20 / 40 feet standard container, the support frame 3 adopts an H-shaped support, and the energy storage units 4 are arranged along the transverse direction of the container, and a plurality of groups of battery PACKs are arranged.

[0063] It should be noted that in the present application, one side of the air outlet guide plate 5 and the air return guide plate 6 for air outlet / air return is a plane, and the other side is an inclined surface. The inclined surface design can form an inclined internal cavity for guiding airflow. Therefore, the side with higher height is the high side, and the side with lower thickness is the low side. The air outlet guide plate 5 and the air return guide plate 6 are a certain distance away from the support frame 3, so that the airflow has a flow space, and the high side and the low side of the air outlet guide plate 5 and the air return guide plate 6 are opposite.

[0064] In an embodiment of the present application, as shown in FIG. 1, the energy storage box 1 includes a support frame 3, a plurality of energy storage units 4 arranged in the support frame 3, an air outlet guide plate 5 arranged on the top of the support frame 3, and an air return guide plate 6 arranged on the bottom of the support frame 3. Figure 8 Figure 10 As shown, the photovoltaic array 2 includes an upper photovoltaic panel 10, a middle photovoltaic panel 11, and a lower photovoltaic panel 12, and the photovoltaic array 2 is unfolded or folded by a folding mechanism;

[0065] The folding mechanism includes:

[0066] A support frame 13 having a frame body 13-3 and fixed support columns 13-1 and adjustable support columns 13-2 arranged on the front side and the rear side of the frame body 13-3 respectively; the middle photovoltaic panel 11 is fixed in the frame body 13-3;

[0067] A front wheel shaft 14 rotatably arranged on the top of the front side of the frame body 13-3 and fixedly connected with the lower photovoltaic panel 12;

[0068] A rear wheel shaft 15 rotatably arranged on the top of the rear side of the frame body 13-3 and fixedly connected with the upper photovoltaic panel 10;

[0069] A transmission mechanism 16 arranged on the side of the frame body 13-3 and used for driving the front wheel shaft 14 and the rear wheel shaft 15 to rotate synchronously.

[0070] ​The transmission mechanism 16 includes gears mounted on the front axle 14 and the rear axle 15, and a chain meshing with the gears. A servo motor 20 is mounted on the rear axle 15, which drives the rear axle 15 to rotate, simultaneously driving the front axle 14 to rotate, thus enabling the photovoltaic panel to unfold and fold. In this embodiment, the central photovoltaic panel is fixed to the frame 13-3, which is fixed to the energy storage container via a fixed support column 13-1 and an adjustable support column 13-2. The adjustable support column 13-2 can be an electro-hydraulic rod, which adjusts the tilt angle of the photovoltaic array 2 by raising the rear frame 13-3. In a specific implementation, the front end of the frame 13-3 is hinged to the fixed support column 13-1.

[0071] In one embodiment, as shown in the appendix Figure 4 ~Appendix Figure 6 As shown, the air outlet guide plate 5 includes two sets of air outlet guide sections 5-1 spaced apart, and the two sets of air outlet guide sections 5-1 are connected on the high side of the air outlet guide plate 5 through a connecting cavity 5-2; the air outlet guide section 5-1 includes a first air outlet guide unit 5-3, a second air outlet guide unit 5-4, and a third air outlet guide unit 5-5 that are horizontally connected at the top and stacked at the bottom with an inclined bottom; the first air outlet guide unit 5-3, the second air outlet guide unit 5-4, and the third air outlet guide unit 5-5 are provided with air outlets 5-6 at the top, and airflow driving components 8 are provided inside the air outlets 5-6.

[0072] The first air outlet guiding unit 5-3, the second air outlet guiding unit 5-4, and the third air outlet guiding unit 5-5 are stacked. After the airflow passes through the connecting cavity 5-2 and enters each air outlet guiding unit, it flows out of the air outlet 5-6 along its respective cavity. In a specific implementation, the airflow driving component 8 inside the air outlet 5-6 can be a non-powered axial flow fan used to guide the airflow upward.

[0073] In one embodiment, as shown in the appendix Figure 7 Appendix Figure 8 As shown, the return air guide plate 6 includes two sets of spaced return air guide sections 6-1, which are connected by a connecting cavity 5-2 on the high side of the return air guide plate 6. Each return air guide section 6-1 includes a first return air guide unit 6-3, a second return air guide unit 6-4, and a third return air guide unit 6-5, which are inclined and stacked at the top and horizontally connected at the bottom. The first return air guide unit 6-3, the second return air guide unit 6-4, and the third return air guide unit 6-5 are provided with return air inlets 6-2 at their bottoms.

[0074] Similar to the air outlet guide plate 5, the air outlet guide plate 5 takes the manifold as two return air guide parts 6-1, and each return air guide part 6-1 is directed to a row of supports 3. The airflow at the top of the energy storage unit 4 enters the cavities of the first return air guide unit 6-3, the second return air guide unit 6-4, and the third return air guide unit 6-5 through the return air inlet 6-2, and is gathered in the connecting cavity 5-2.

[0075] In one embodiment, as shown in the accompanying drawings Figure 7 and the accompanying drawings Figure 11 , the number of supports 3 is two groups, each group of supports 3 is aligned with a group of return air guide parts 6-1 and a group of air outlet guide parts 5-1, and the airflow driving part 8 is arranged at the top of the energy storage unit 4 in the uppermost layer of the supports 3. The airflow driving part 8 at the top of the energy storage unit 4 in the uppermost layer of the supports 3 is powered by the energy storage unit 4, controlled by the control bin, and is a small power axial fan that can be adjusted at low, medium and high speeds.

[0076] In one embodiment, as shown in the accompanying drawings Figure 3 , the high side of the return air guide plate 6 is connected to the inlet of the return air passage 9 through a four-way pipe 17, and the other two pipe openings of the four-way pipe 17 are respectively provided with an electrically operated ventilation valve 18 and an electrically operated dehumidification valve 19; the return air passage 9 is arranged between the two groups of supports 3. The horizontal section of the return air passage 9 is higher than the uppermost layer of the energy storage unit 4, and the vertical section is close to the tank wall, so as to avoid blocking the airflow.

[0077] The application also provides a heat dissipation management method of a photovoltaic cooperative-air cooling heat dissipation energy storage container, comprising the following steps:

[0078] In this embodiment, cold air is generated by an air conditioner outside and introduced into the air inlet passage.

[0079] Step 1: Collect parameters, including environmental structure parameters, photovoltaic array parameters, and energy storage parameters;

[0080] The environmental structure parameters include: the latitude and longitude of the energy storage container, 24-hour forecast wind speed, wind direction, temperature, humidity, and tank top temperature T top , real-time wind speed, solar radiation intensity, and the angle between the unfolded surface of the photovoltaic array and the direction of the sun;

[0081] The photovoltaic array parameters include: the output voltage, output current, real-time output power of the photovoltaic, and the inclination angle after unfolding the photovoltaic panel. Among them, the solar radiation intensity is used to determine the daytime or nighttime condition, and the output voltage and output current of the photovoltaic are used to calculate the output power for later adjustment. Tank top temperature T top as an execution judgment index for strategy correction.

[0082] The energy storage parameter includes: average temperature of each column of energy storage units along the vertical direction of the support T avg , PACK temperature, humidity and temperature gradient, air inlet channel connected air conditioner power, air outlet velocity, electrically operated ventilation valve and electrically operated dehumidification valve switching state.

[0083] Step two: calculate the heat dissipation priority weight according to the priority weight calculation formula, and divide the heat dissipation level into low demand, medium demand and high demand according to the priority weight; the priority weight calculation formula is as follows:

[0084] ;

[0085] In the formula, represents the temperature gradient of each column of energy storage units along the vertical direction of the support, RH pack represents the humidity of each column of energy storage units along the vertical direction of the support, P pv represents the real-time output power of the photovoltaic array, V wind represents the real-time wind speed;

[0086] The maximum and minimum values of the PACK temperature are calculated.

[0087] Step three: further judge whether the collection parameters meet the judgment condition of the current heat dissipation level according to the heat dissipation level, if yes, execute the air cooling system strategy and the photovoltaic cooperative strategy; if not, do not execute.

[0088] In specific implementation, all judgment conditions need to be judged during the day and when the wind speed is less than or equal to 10 m / s, when the wind speed is greater than 10 m / s, the photovoltaic array is folded, and only the air cooling system strategy is executed.

[0089] In step two and step three, when 0≤ Q < 3, the corresponding heat dissipation level is low demand, and the further judgment condition of the low demand heat dissipation level is T avg ≤ 25 ℃ and ΔT≤ 2 ℃ and RH pack ≤ 50 %; the air cooling system strategy of the low demand heat dissipation level is: stop air inlet of the air inlet channel, open the electrically operated ventilation valve, close the electrically operated dehumidification valve, and the top of the energy storage unit of the uppermost layer of the support is provided with an airflow driving member running at low speed; the photovoltaic system strategy of the low demand heat dissipation level is: the photovoltaic array is unfolded, the adjustable support column adjusts the photovoltaic array to the optimal inclination angle, and the photovoltaic array preferentially supplies power to the energy storage unit.

[0090] In the specific implementation, the top of the uppermost layer of the support is provided with an airflow driving member which is a small power axial flow fan driven by the energy storage battery. According to the performance parameters of the axial flow fan, the wind speed is divided into three grades, which are respectively used as low-speed, medium-speed and high-speed working conditions. In this embodiment, the air inlet passage is stopped by closing the air conditioner.

[0091] When 3≤ Q <7, the corresponding heat dissipation level is medium demand, and the further determination condition of the medium demand heat dissipation level is 25℃< T avg ≤35 ℃ or 2 ℃<Δ T ≤4 ℃ or 50 %< RH pack ≤60 %; the air cooling system strategy of the medium demand heat dissipation level is that the air inlet passage is in medium-speed air inlet, the electric ventilation valve is closed, the electric dehumidification valve is opened, and the airflow driving member at the top of the uppermost layer of the support is in medium-speed operation; the photovoltaic system strategy of the medium demand heat dissipation level is that the photovoltaic array is unfolded, the adjustable support column adjusts the photovoltaic array to the optimal inclination, the photovoltaic array preferentially supplies power to the air supply equipment connected to the air inlet passage, and the remaining power is supplied to the energy storage unit.

[0092] In this embodiment, the medium-speed air inlet of the air inlet passage is realized by adjusting the air conditioner power. When the air is supplied at medium speed, the air conditioner operates at 50% rated power. Further, the opening and closing of the electric dehumidification valve can be further subdivided in this embodiment. With 55% as the boundary, the electric dehumidification valve is opened when the boundary is exceeded, and the electric dehumidification valve is closed when the boundary is not exceeded.

[0093] When 7≤ Q ≤10, the corresponding heat dissipation level is high demand, and the further determination condition of the high demand heat dissipation level is T avg >35 ℃ or ΔT>4 ℃ or RH pack >60 %; the air cooling system strategy of the high demand heat dissipation level is that the air inlet passage is in high-speed air inlet, the electric ventilation valve is closed, the electric dehumidification valve is opened, and the airflow driving member at the top of the uppermost layer of the support is in high-speed operation; the photovoltaic system strategy of the high demand heat dissipation level is that the photovoltaic array is unfolded, the adjustable support column adjusts the photovoltaic array to the optimal inclination, the photovoltaic array preferentially supplies power to the air supply equipment connected to the air inlet passage, and the remaining power is supplied to the energy storage unit.

[0094] Further, the opening and closing of the electric ventilation valve and the electric dehumidification valve can be further subdivided in this embodiment, RH pack the ventilation valve is closed when >60%, T avg >35 ℃ and RH pack the electric ventilation valve is opened and the electric dehumidification valve is closed when ≤55 %, and onlyRH pack ≤55 % when both valves are closed.

[0095] In addition, the execution strategy also includes two constraint conditions: first, when T top > 35℃, regardless of photovoltaic power, forced to adjust the photovoltaic expansion area to the maximum for sunshade linkage to reduce the heat radiation absorption of the box. Second, when the real-time output power of the photovoltaic P pv < 0.3 P ac When (air conditioner variable frequency power), switch to energy storage battery power supply, and at the same time reduce the air conditioner power to 30% rated power, and reduce the axial flow fan speed to low speed, to avoid excessive consumption of energy storage.

[0096] The heat dissipation management method further includes:

[0097] Step four: collect the reference index after executing the air cooling system strategy and the photovoltaic coordination strategy, and if the reference index exceeds the deviation setting range, execute the correction strategy; the reference index includes the energy storage side change rate, change value, RH pack change value, and the air outlet wind speed on the equipment side V duct 、 P ac actual power, and actual inclination angle of the photovoltaic array. The energy storage change rate is ΔT avg / Δt, and Δt represents the time change interval.

[0098] In one specific embodiment, if ΔT avg / Δt≤0.3 ℃ / 5min (the heat dissipation effect does not reach the expectation) or ΔT increases by >1 ℃ (the uniformity is deteriorated) or T top ΔT > 3 ℃ within 5 minutes and P pv decreases by >8% (the photovoltaic overheating causes power attenuation) or the real-time wind speed suddenly rises to above 10 m / s or suddenly drops by <1 m / s (environmental mutation), when any of the above situations occurs, the correction strategy can be executed according to the specific triggering scene. For the scene where the heat dissipation effect does not reach the expectation, the heat dissipation priority can be changed to increase the air conditioner power and the axial flow fan speed. For the scene where the uniformity is deteriorated, the air conditioner power can be adjusted, and the axial flow fan of the region is started. For the scene where the photovoltaic overheating causes power attenuation, the photovoltaic inclination angle and the air conditioner power can be adjusted to preferentially guarantee the photovoltaic efficiency. For the environmental mutation scene, the photovoltaic array can be folded, the ventilation valve is closed, the air conditioner power is reduced, and the axial flow fan speed is reduced.

[0099] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0100] The above embodiments are only used to illustrate the present application, but not to limit it. Various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present application shall fall into the scope of claims of the present application.

Claims

1. A photovoltaic synergistic-wind cooling heat dissipation energy storage container, comprising an energy storage box and a photovoltaic array arranged on the top of the energy storage box; the inside of the energy storage box has a control room and an energy storage room, and each energy storage unit is arranged in the energy storage room through a plurality of groups of supports, characterized in that, the lower part of the support is configured as an air outlet space, and the upper part is configured as an air return space; the air outlet space is provided with an air outlet guide plate, the air outlet guide plate is configured as a cavity structure with a flat top surface and an inclined bottom surface, so that the air outlet guide plate forms a low side and a high side at the middle and the edge of the energy storage container respectively; the high side of the air outlet guide plate is provided with an air inlet channel for cold air to pass in, and the top surface of the air outlet guide plate is provided with an airflow driving member; the air outlet guide plate comprises two groups of air outlet guide parts arranged at intervals, and the two groups of air outlet guide parts are connected through a connecting cavity at the high side of the air outlet guide plate; the air outlet guide part comprises a first air outlet guide unit, a second air outlet guide unit and a third air outlet guide unit which are horizontally connected at the top and are inclined and stacked at the bottom; the first air outlet guide unit, the second air outlet guide unit and the third air outlet guide unit are provided with air outlets at the top, and the air outlets are provided with airflow driving members inside; the air return space is provided with an air return guide plate, the air return guide plate is configured as a cavity structure with an inclined top surface and a flat bottom surface, so that the air return guide plate forms a high side and a low side at the middle and the edge of the energy storage container respectively, and the high side of the air return guide plate leads out an air return channel, the other end of the air return channel is connected to the high side of the air outlet guide plate; the air return guide plate comprises two groups of air return guide parts arranged at intervals, and the two groups of air return guide parts are connected through a connecting cavity at the high side of the air return guide plate; the air return guide part comprises a first air return guide unit, a second air return guide unit and a third air return guide unit which are inclined and stacked at the top and are horizontally connected at the bottom; the first air return guide unit, the second air return guide unit and the third air return guide unit are provided with air return ports at the bottom. 2.The photovoltaic synergistic-wind cooling heat dissipation energy storage container according to claim 1, characterized in that, the photovoltaic array comprises upper photovoltaic panels, middle photovoltaic panels and lower photovoltaic panels, and the photovoltaic array is unfolded or stored through a folding mechanism; the folding mechanism comprises: a support frame having a frame body and fixed support columns and adjustable support columns arranged on the front side and the rear side of the frame body respectively; the middle photovoltaic panels are fixed in the frame body; a front wheel shaft rotatably arranged on the top of the front side of the frame body and fixedly connected with the lower photovoltaic panels; a rear wheel shaft rotatably arranged on the top of the rear side of the frame body and fixedly connected with the upper photovoltaic panels; a transmission mechanism arranged on the side of the frame body and used for driving the front wheel shaft and the rear wheel shaft to rotate synchronously. 3.The photovoltaic synergistic-wind cooling heat dissipation energy storage container according to claim 2, characterized in that, the number of supports is two groups, each group of supports is aligned with a group of air return guide parts and a group of air outlet guide parts, and the top of the energy storage unit located at the uppermost layer of the support is provided with an airflow driving member.

4. The photovoltaic synergic-air cooling heat dissipation energy storage container according to claim 3, characterized in that, the high edge side of the return air guide plate is connected with the inlet of the return air passage through a four-way pipe, and the other two pipe openings of the four-way pipe are respectively provided with an electric air valve and an electric dehumidification valve; the return air passage is arranged between the two groups of supports.

5. The heat dissipation management method of the photovoltaic synergistic- air-cooled heat dissipation energy storage container according to claim 4, characterized in that, The method comprises the following steps: Step 1: Collecting parameters, including environmental structure parameters, photovoltaic array parameters and energy storage parameters; Step 2: Calculate the heat dissipation priority weight according to the priority weight calculation formula, and divide the heat dissipation level into low demand, medium demand and high demand according to the priority weight; the priority weight calculation formula is as follows: ； wherein, represents the temperature gradient of each column of energy storage units along the vertical direction of the rack, RH pack represents the humidity of each column of energy storage units along the vertical direction of the rack, P pv represents the real-time output power of the photovoltaic array, V wind represents the real-time wind speed; Step 3: Further judge whether the collected parameters meet the judgment condition of the current heat dissipation level according to the heat dissipation level, if yes, execute the air cooling system strategy and the photovoltaic synergic strategy; if not, do not execute.

6. The heat dissipation management method of the photovoltaic synergic-air cooling heat dissipation energy storage container according to claim 5, characterized in that, the environmental structure parameters include: the latitude and longitude of the energy storage container, the solar radiation intensity, the 24-hour forecast wind speed, wind direction, temperature, humidity, the temperature of the top of the container body, the real-time wind speed, and the angle between the unfolded surface of the photovoltaic array and the sun; the photovoltaic array parameters include: the output voltage, output current, real-time output power of the photovoltaic, and the optimal inclination angle after unfolding of the photovoltaic panel; the energy storage parameters include: the average temperature of each column of energy storage units along the vertical direction of the support, the PACK temperature, humidity and temperature gradient, the air conditioning power connected with the air inlet passage, the air outlet speed, and the switch state of the electric air valve and the electric dehumidification valve.

7. The heat dissipation management method of the photovoltaic synergic-air cooling heat dissipation energy storage container according to claim 6, characterized in that, The heat dissipation management method further comprises: Step four: collect the reference index after the execution of the air cooling system strategy and the photovoltaic coordination strategy, if the reference index exceeds the deviation setting range, execute the correction strategy; the reference index includes the energy storage side change rate, change value, RH pack change value, air outlet wind speed V duct , air conditioner variable frequency power P ac , actual inclination angle of photovoltaic array.

8. The heat dissipation management method of the photovoltaic synergic-air cooling heat dissipation energy storage container according to claim 7, characterized in that, In step two and step three, when 0≤ Q <3, the corresponding heat dissipation level is low demand, and the further determination condition of the low demand heat dissipation level is that the average temperature of the energy storage unit T avg ≤25 ℃ and ΔT≤2 ℃ and RH pack ≤50 %; the air cooling system strategy of the low demand heat dissipation level is to stop the air inlet of the air inlet channel, open the electric ventilation valve, close the electric dehumidification valve, and the top of the energy storage unit at the uppermost layer of the support is provided with a low-speed running airflow driving member; the photovoltaic system strategy of the low demand heat dissipation level is that the photovoltaic array is unfolded, the adjustable support column adjusts the photovoltaic array to the optimal inclination angle, and the photovoltaic array preferentially supplies power to the energy storage unit; when 3≤ Q <7, the corresponding heat dissipation level is medium demand, and the further determination condition of the medium demand heat dissipation level is 25 ℃< T avg ≤35 ℃ or 2 ℃<Δ T ≤4 ℃ or 50 %< RH pack ≤60 %; the air cooling system strategy of the medium demand heat dissipation level is that the air inlet channel is in medium-speed air inlet, the electric ventilation valve is closed, the electric dehumidification valve is opened, and the airflow driving member on the top of the uppermost layer of the support is in medium-speed operation; the photovoltaic system strategy of the medium demand heat dissipation level is that the photovoltaic array is unfolded, the adjustable support column adjusts the photovoltaic array to the optimal inclination angle, the photovoltaic array preferentially supplies power to the air supply equipment connected to the air inlet channel, and the remaining power is supplied to the energy storage unit; when 7≤ Q ≤10, the corresponding heat dissipation level is high demand, and the further determination condition of the high demand heat dissipation level is T avg > 35℃ or ΔT > 4℃ or RH pack > 60 %; the air cooling system strategy of the high demand heat dissipation level is: high-speed air inlet of the air inlet channel, closing the electric ventilation valve, opening the electric dehumidification valve, and the top of the energy storage unit on the uppermost layer of the support is provided with an airflow driving member running at high speed; the photovoltaic system strategy of the high demand heat dissipation level is: the photovoltaic array is unfolded, the adjustable support column adjusts the photovoltaic array to the optimal inclination angle, the photovoltaic array preferentially supplies power to the air supply equipment connected to the air inlet channel, and the remaining power supplies the energy storage unit.

Images