Energy storage all-in-one machine, air duct control method and system of energy storage all-in-one machine

Abstract

The application provides an energy storage integrated machine, an air duct control method and system of the energy storage integrated machine. The energy storage integrated machine comprises a shell, a heat dissipation fin is arranged outside the shell, an energy storage converter, a battery module, the battery module is arranged below the energy storage converter, a first air duct cover plate is arranged opposite to the energy storage converter, a first air duct is formed between the first air duct cover plate and the heat dissipation fin, a second air duct cover plate is arranged opposite to the battery module, a second air duct is formed between the second air duct cover plate and the heat dissipation fin, a fan is arranged between the first air duct and the second air duct, and the second air duct cover plate comprises a first movable cover plate, a second movable cover plate and a fixed cover plate. The first movable cover plate and the second movable cover plate are movably connected with the fixed cover plate respectively, and the first movable cover plate and the second movable cover plate are switched between an open position and a closed position based on the temperature of the battery module. The application can make the battery module stably and long-term in the best working temperature range.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and more specifically, to an integrated energy storage unit, a method and system for controlling the air duct of the integrated energy storage unit. Background Technology

[0002] With the development of the industry, the output power and cell discharge rate of integrated energy storage devices are getting higher and higher. Energy storage converters and battery modules need to have stronger heat dissipation performance. Since energy storage products are widely used around the world, they often face low temperature or high temperature usage scenarios. However, excessively high and low temperatures will affect the performance and life of the cells. How to efficiently keep the cells at the optimal operating temperature has become the development direction of the industry. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, the first aspect of the present invention proposes an integrated energy storage device.

[0005] A second aspect of the present invention proposes a method for controlling the air duct of an integrated energy storage unit.

[0006] A third aspect of the present invention proposes a duct control system for an integrated energy storage unit.

[0007] In view of this, according to a first aspect of the present invention, an integrated energy storage device is provided, comprising: a housing, the exterior of which is provided with heat dissipation fins; an energy storage converter disposed inside the housing; a battery module disposed inside the housing and located below the energy storage converter; a first air duct cover plate disposed outside the housing and opposite to the energy storage converter, forming a first air duct between the first air duct cover plate and the heat dissipation fins; and a second air duct cover plate disposed outside the housing and opposite to the battery module, forming a second air duct. A second air duct is formed between the cover plate and the heat dissipation fins; a fan is disposed between the first air duct and the second air duct; the second air duct cover plate includes: a first movable cover plate, a second movable cover plate and a fixed cover plate, wherein the first movable cover plate and the second movable cover plate are respectively movably connected to the fixed cover plate; when the first movable cover plate is in the open position, the first air duct and the second air duct are connected; when the second movable cover plate is in the open position, external air can enter the second air duct; wherein, based on the temperature of the battery module, the first movable cover plate and the second movable cover plate switch between the open position and the closed position.

[0008] The energy storage integrated unit provided by this invention mainly includes: a housing, an energy storage converter, a battery module, a first air duct cover, a second air duct cover, and a fan. The housing has external heat dissipation fins for auxiliary heat dissipation. The energy storage converter is installed in the upper part of the housing, and the battery module is installed in the lower part of the housing, forming a layered layout. The first air duct cover is mounted on the outside of the housing, facing the energy storage converter, and together with the heat dissipation fins, forms the first air duct, specifically for cooling the energy storage converter. The second air duct cover is mounted on the outside of the housing, facing the battery module, and together with the heat dissipation fins, forms the second air duct, specifically for cooling the battery module. The fan is positioned between the first and second air ducts, serving as an airflow power source. When the temperature of the energy storage converter becomes too high, the fan can be activated to allow outside air to enter the first air duct, thus achieving heat dissipation for the energy storage converter.

[0009] The second air duct cover consists of a first movable cover, a second movable cover, and a fixed cover. The first and second movable covers are movably connected to the fixed cover, meaning they can rotate relative to it. The first movable cover can rotate between a first position and a second position. When the first movable cover is in the first position (open), the first and second air ducts are connected, allowing airflow. When the first movable cover is in the second position (closed), the first and second air ducts are not connected, and airflow from above cannot enter the second air duct. The second movable cover can rotate between a third and a fourth position. When the second movable cover is in the third position (open), air from the bottom can enter the second air duct directly without passing through the first air duct. When the second movable cover is in the fourth position (closed), air from the bottom cannot enter the second air duct.

[0010] When the integrated energy storage unit is operating, the temperature of the battery module is monitored in real time. Based on this temperature, the first and second movable covers switch between open and closed positions. For example, when the battery module temperature exceeds a set maximum temperature, the first movable cover is controlled to a first position and the second movable cover to a third position (both open), and the fan is activated, allowing air to directly enter the second air duct from the second movable cover, thus cooling the battery module. When the battery module temperature is below a set minimum temperature, the first movable cover is controlled to a first position and the second movable cover to a fourth position (open and closed), and the fan is activated, allowing external air to enter the second air duct through the first air duct. It is understood that the external air is heated by the heat emitted by the energy storage converter as it passes through the first air duct; therefore, upon entering the second air duct, the heated external air uses its own heat to heat the battery module, increasing its temperature.

[0011] This invention achieves flexible and controllable airflow structure and airflow path by integrating heat dissipation fins into the housing, arranging the energy storage converter and battery module in upper and lower layers, independently setting the first and second air ducts, and using a combination structure of a first movable cover plate, a second movable cover plate, and a fixed cover plate that can be switched on and off in the second air duct. It can form a directional and efficient heat dissipation channel for the energy storage converter and dynamically adjust the airflow conduction mode according to the battery module temperature. Without the need for additional heating / cooling components, it simultaneously meets the dual requirements of efficient heat dissipation of the energy storage converter and forced heat dissipation and self-heating of the battery module at high temperatures. By independently partitioning the air ducts and opening and closing them as needed, it reduces unnecessary fan operation at the source, significantly reduces the overall operating noise, optimizes heat dissipation and power consumption, and keeps the battery module in the optimal operating temperature range for a long time. This effectively protects the performance and lifespan of the battery cells and greatly improves the adaptability and user experience of the integrated energy storage unit in various temperature environments around the world.

[0012] In some technical solutions, optionally, the energy storage converter includes at least two working modules; the first air duct includes at least two independent air ducts, wherein each independent air duct corresponds to one working module and each independent air duct corresponds to at least one fan, wherein, based on the working mode of the integrated energy storage unit and the temperature of each working module, the fan corresponding to the working module switches between starting and not starting.

[0013] In some technical solutions, optionally, the energy storage converter includes: a photovoltaic module, a DC-DC step-up / step-down module, and an AC / DC inverter module arranged in sequence; the first air duct includes: a third air duct, a fourth air duct, and a fifth air duct; the fan includes: a first fan, a second fan, and a third fan, wherein the third air duct, the fourth air duct, and the fifth air duct are independent of each other, the third air duct corresponds to the photovoltaic module, the fourth air duct corresponds to the DC-DC step-up / step-down module, and the fifth air duct corresponds to the AC / DC inverter module; the first fan is located below the third air duct, the second fan is located below the fourth air duct, and the third fan is located below the fifth air duct.

[0014] According to a second aspect of the present invention, a duct control method for an integrated energy storage unit is proposed, for use in any of the above-described technical solutions. The duct control method for the integrated energy storage unit includes: acquiring a first temperature of the battery module, a second temperature of the photovoltaic module, a third temperature of the DC-DC buck-boost module, and a fourth temperature of the AC-DC inverter module; controlling a first movable cover and a second movable cover to switch between an open position and a closed position based on the first temperature; and controlling a first fan, a second fan, and a third fan to operate based on the operating mode of the integrated energy storage unit, the second temperature, the third temperature, and the fourth temperature.

[0015] The present invention provides a duct control method for an integrated energy storage device, applicable to any of the aforementioned technical solutions. The duct control method includes: firstly, acquiring in real-time the first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module. The photovoltaic module, DC-DC buck-boost module, and AC-DC inverter module are sequentially integrated into an energy storage converter. The first duct includes a third, fourth, and fifth duct. The third duct corresponds to the photovoltaic module, allowing air to pass through it for heat dissipation; the fourth duct corresponds to the DC-DC buck-boost module, allowing air to pass through it for heat dissipation; and the fifth duct corresponds to the AC-DC inverter module, allowing air to pass through it for heat dissipation. The fan includes a first fan, a second fan, and a third fan. The first fan is located below the third duct, allowing external air to enter the third duct for heat dissipation of the photovoltaic module when the first fan is activated. The second fan is located below the fourth air duct. When the second fan is turned on, outside air can enter the fourth air duct to dissipate heat from the DC-DC buck-boost module. The third fan is located below the fifth air duct. When the third fan is turned on, outside air can enter the fifth air duct to dissipate heat from the AC-DC inverter module. Subsequently, the first and second movable covers are switched between open and closed positions according to the first temperature control, so that the battery module can be cooled when the temperature is high and heated when the temperature is low, thus keeping the battery module at a suitable temperature. The operation of the first, second, and third fans can also be controlled according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature. For example, the first fan can be controlled according to the operating mode of the energy storage unit and the second temperature to dissipate heat from the photovoltaic module. The second fan can be controlled according to the operating mode of the energy storage unit and the third temperature to dissipate heat from the DC-DC buck-boost module. The third fan can be controlled according to the operating mode of the energy storage unit and the fourth temperature to dissipate heat from the AC-DC inverter module. This invention uses temperature as the core control basis, combines the working mode to determine the heat dissipation requirements, and adjusts in real time through closed-loop control to ensure that the core components are always at a suitable temperature, thereby improving the reliability of the equipment.

[0016] Optionally, in some technical solutions, the step of controlling the first and second movable covers to switch between open and closed positions based on a first temperature includes: when the first temperature is greater than a first preset temperature, controlling both the first and second movable covers to be in the open position, and simultaneously controlling the first, second, and third fans to operate so that external airflow can dissipate heat from the battery module through the second air duct; when the first temperature is less than a second preset temperature, controlling the first movable cover to be in the open position, controlling the second movable cover to be in the closed position, and simultaneously controlling the first, second, and third fans to operate so that the heated airflow flowing through the first air duct can heat the battery module; when the temperature of the battery module is greater than the second preset temperature but less than the first preset temperature, controlling both the first and second movable covers to be in the closed position.

[0017] In some technical solutions, optionally, the steps of controlling the operation of the first fan, the second fan, and the third fan according to the working mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature include: when the working mode of the energy storage unit is photovoltaic charging mode, controlling the first fan to start according to the second temperature; controlling the second fan to start according to the third temperature; and controlling the third fan not to start.

[0018] In some technical solutions, optionally, the steps of controlling the operation of the first fan, the second fan, and the third fan according to the working mode of the integrated energy storage unit, the second temperature, the third temperature, and the fourth temperature include: when the working mode of the integrated energy storage unit is photovoltaic grid-connected output mode, controlling the first fan to start according to the second temperature; controlling the third fan to start according to the fourth temperature; and controlling the second fan not to start.

[0019] In some technical solutions, optionally, the steps of controlling the operation of the first fan, the second fan, and the third fan according to the working mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature include: when the working mode of the energy storage unit is the bidirectional charging and discharging mode of the battery module and the grid, controlling the second fan to start according to the third temperature; controlling the third fan to start according to the fourth temperature; and controlling the first fan not to start.

[0020] In some technical solutions, optionally, the steps of controlling the operation of the first fan, the second fan, and the third fan according to the working mode of the integrated energy storage unit, the second temperature, the third temperature, and the fourth temperature include: when the working mode of the integrated energy storage unit is to simultaneously perform photovoltaic charging and grid feeding, controlling the first fan to start according to the second temperature; controlling the second fan to start according to the third temperature; and controlling the third fan to start according to the fourth temperature.

[0021] According to a third aspect of the present invention, a duct control system for an integrated energy storage unit is provided, for use in any of the above-described technical solutions. The duct control system for the integrated energy storage unit includes: a first acquisition module, configured to acquire a first temperature of the battery module, a second temperature of the photovoltaic module, a third temperature of the DC-DC buck-boost module, and a fourth temperature of the AC-DC inverter module; a first processing module, configured to control a first movable cover and a second movable cover to switch between an open position and a closed position based on the first temperature; and a second processing module, configured to control a first fan, a second fan, and a third fan to operate based on the operating mode of the integrated energy storage unit, the second temperature, the third temperature, and the fourth temperature.

[0022] The present invention provides an air duct control system for an integrated energy storage device, used in any of the above-described technical solutions. The air duct control system includes a first acquisition module, a first processing module, and a second processing module. The first acquisition module first acquires in real-time the first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module. The photovoltaic module, the DC-DC buck-boost module, and the AC-DC inverter module are sequentially integrated into the energy storage converter. The first air duct includes a third air duct, a fourth air duct, and a fifth air duct. The third air duct corresponds to the photovoltaic module, meaning that air passing through the third air duct can dissipate heat from the photovoltaic module; the fourth air duct corresponds to the DC-DC buck-boost module, meaning that air passing through the fourth air duct can dissipate heat from the DC-DC buck-boost module; and the fifth air duct corresponds to the AC-DC inverter module, meaning that air passing through the fifth air duct can dissipate heat from the AC-DC inverter module. The fan includes a first fan, a second fan, and a third fan. The system comprises three fan configurations: a first fan located below the third air duct, allowing outside air to enter and cool the photovoltaic module when activated; a second fan located below the fourth air duct, allowing outside air to enter and cool the DC-DC buck-boost module when activated; and a third fan located below the fifth air duct, allowing outside air to enter and cool the AC-DC inverter module when activated. The first processing module controls the first and second movable covers to switch between open and closed positions based on a first temperature. This allows for cooling the battery module when its temperature is high and heating it when its temperature is low, ensuring the battery module remains at a suitable temperature. The second processing module can also control the operation of the first, second, and third fans based on the energy storage unit's operating mode, a second temperature, a third temperature, and a fourth temperature. For example, the first fan can be controlled based on the energy storage unit's operating mode and the second temperature to cool the photovoltaic module, and the second fan can be controlled based on the energy storage unit's operating mode and the third temperature to cool the DC-DC buck-boost module. Based on the operating mode of the integrated energy storage unit and the operation of the third fan controlled by the fourth temperature controller, heat dissipation is achieved for the AC / DC inverter module. This invention uses temperature as the core control basis, combines the operating mode to determine heat dissipation requirements, and adjusts in real time through closed-loop control to ensure that core components are always at a suitable temperature, thereby improving equipment reliability.

[0023] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 One of the structural schematic diagrams of an energy storage integrated machine according to an embodiment of the present invention is shown;

[0026] Figure 2 A second schematic diagram of the structure of an integrated energy storage device according to an embodiment of the present invention is shown;

[0027] Figure 3 The third schematic diagram shows the structure of an integrated energy storage device according to an embodiment of the present invention;

[0028] Figure 4 The fourth schematic diagram shows the structure of an integrated energy storage device according to an embodiment of the present invention;

[0029] Figure 5 Fifth schematic diagram of the structure of an integrated energy storage device according to an embodiment of the present invention is shown;

[0030] Figure 6 Sixth schematic diagram of the structure of an integrated energy storage device according to an embodiment of the present invention is shown;

[0031] Figure 7 The seventh schematic diagram shows the structure of an integrated energy storage device according to an embodiment of the present invention;

[0032] Figure 8 Eighth schematic diagram of the structure of an integrated energy storage device according to an embodiment of the present invention is shown;

[0033] Figure 9 A schematic diagram of the structure of an integrated energy storage device according to an embodiment of the present invention is shown in Figure 9.

[0034] Figure 10 A flowchart illustrating the air duct control method of an energy storage integrated machine according to an embodiment of the present invention is shown.

[0035] Figure 11 A schematic block diagram of the air duct control system of an energy storage integrated machine according to an embodiment of the present invention is shown.

[0036] in, Figures 1 to 9 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0037] 10. Energy storage unit, 102. Housing, 1022. Heat sink, 104. Energy storage converter, 106. Front cover, 108. Battery module, 110. First air duct cover, 112. Second air duct cover, 1122. First movable cover, 1124. Second movable cover, 1126. Fixed cover, 114. Fan, 1142. First fan, 1144. Second fan, 1146. Third fan, 1042. Working module, 1044. Photovoltaic module, 1046. DC-DC step-up / step-down module, 1048. AC / DC inverter module, 116. Thermal conductive silicone, 120. Motor, 122. Shaft. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0040] like Figures 1 to 9 As shown, the present invention proposes an integrated energy storage device 10, comprising: a housing 102, wherein heat dissipation fins 1022 are disposed on the exterior of the housing 102; an energy storage inverter 104 disposed inside the housing 102; a battery module 108 disposed inside the housing 102 and located below the energy storage inverter 104; a first air duct cover 110 disposed outside the housing 102 and opposite to the energy storage inverter 104, forming a first air duct between the first air duct cover 110 and the heat dissipation fins 1022; and a second air duct cover 112 disposed outside the housing 102 and opposite to the battery module 108. A second air duct is formed between plate 112 and heat dissipation fins 1022; fan 114 is disposed between the first air duct and the second air duct; the second air duct cover 112 includes: a first movable cover 1122, a second movable cover 1124 and a fixed cover 1126, wherein the first movable cover 1122 and the second movable cover 1124 are respectively movably connected to the fixed cover 1126. When the first movable cover 1122 is in the open position, the first air duct and the second air duct are connected. When the second movable cover 1124 is in the open position, external air can enter the second air duct. The first movable cover 1122 and the second movable cover 1124 switch between the open position and the closed position based on the temperature of the battery module 108.

[0041] The energy storage integrated unit 10 provided by this invention mainly includes: a housing 102, an energy storage converter 104, a battery module 108, a first air duct cover 110, a second air duct cover 112, and a fan 114. The housing 102 has heat dissipation fins 1022 on its exterior for auxiliary heat dissipation. The energy storage converter 104 is installed in the upper region inside the housing 102, and the battery module 108 is installed in the lower region inside the housing 102, forming a layered layout. The first air duct cover 110 is mounted on the exterior of the housing 102, directly opposite the energy storage converter 104, and together with the heat dissipation fins 1022, forms a first air duct specifically for heat dissipation of the energy storage converter 104. The second air duct cover 112 is mounted on the exterior of the housing 102, directly opposite the battery module 108, and together with the heat dissipation fins 1022, forms a second air duct specifically for heat dissipation of the battery module 108. The fan 114 is arranged between the first and second air ducts, serving as an airflow power source. When the temperature of the energy storage inverter 104 becomes too high, the fan 114 can be activated to allow outside air to enter the first air duct, thus dissipating heat from the energy storage inverter 104. Simultaneously, the integrated energy storage unit 10 also includes a front cover 106 and thermally conductive silicone 116. After the energy storage inverter 104 and battery module 108 are installed in the housing 102, the front cover 106 can seal them, ensuring the safe operation of the energy storage inverter 104 and battery module 108. At the same time, the housing 102 is filled with thermally conductive silicone 116, which rapidly conducts heat from the energy storage inverter 104 and battery module 108 to the housing 102 and the heat sink fins 1022, enhancing heat dissipation efficiency.

[0042] like Figure 5 As shown, the second air duct cover 112 consists of a first movable cover 1122, a second movable cover 1124, and a fixed cover 1126. The first movable cover 1122 and the second movable cover 1124 are movably connected to the fixed cover 1126, meaning that the first movable cover 1122 and the second movable cover 1124 can rotate relative to the fixed cover 1126. The first movable cover 1122 can rotate between a first position and a second position. When the first movable cover 1122 rotates to the first position, i.e., when the first movable cover 1122 is open, the first air duct and the second air duct are connected, thus enabling airflow exchange. When the first movable cover 1122 rotates to the second position, i.e., when the first movable cover 1122 is closed, the first air duct and the second air duct are not connected. Airflow from above cannot enter the second air duct. The second movable cover 1124 can rotate between the third and fourth positions. When the second movable cover 1124 is rotated to the third position, that is, when the second movable cover 1124 is open, the bottom air can enter the second air duct directly without passing through the first air duct. When the second movable cover 1124 is rotated to the fourth position, that is, when the second movable cover 1124 is closed, the bottom air cannot enter the second air duct.

[0043] For example, such as Figure 5 and Figure 6 As shown, the first movable cover plate 1122 is connected to the fixed cover plate 1126 via a rotating shaft 122, and the second movable cover plate 1124 is also connected to the fixed cover plate 1126 via a rotating shaft 122. The first movable cover plate 1122 and the second movable cover plate 1124 can rotate freely. A motor 120 is also provided between the first movable cover plate 1122 and the fixed cover plate 1126, and between the second movable cover plate 1124 and the fixed cover plate 1126. The motor 120 can control the rotation of the first movable cover plate 1122 and the second movable cover plate 1124 to open and close, thereby switching the first movable cover plate 1122 and the second movable cover plate 1124 between open and closed positions.

[0044] When the energy storage unit 10 is operating, it acquires the temperature of the battery module 108 in real time, and then switches the first movable cover 1122 and the second movable cover 1124 between open and closed positions based on the temperature of the battery module 108. For example, as... Figure 7 As shown, Figure 7 The arrows indicate the direction of external airflow. When the temperature of the battery module 108 is between the set maximum and minimum temperatures, the first movable cover 1122 is controlled to be in the second position and the second movable cover 1124 is controlled to be in the fourth position, that is, both the first movable cover 1122 and the second movable cover 1124 are controlled to be in the closed position, thereby preventing external air from entering the second air duct and thus preventing the battery module 108 from being cooled or heated. Figure 8 As shown, Figure 8 The arrows indicate the direction of external airflow. When the temperature of the battery module 108 exceeds the set maximum temperature, the first movable cover 1122 is controlled to be in the first position and the second movable cover 1124 is controlled to be in the third position, that is, both the first movable cover 1122 and the second movable cover 1124 are controlled to be in the open position. At the same time, the fan 114 is controlled to turn on, so that the bottom air enters the second air duct directly from the second movable cover 1124, thereby dissipating heat and cooling the battery module 108. Figure 9 As shown, Figure 9 The arrows in the diagram indicate the direction of external airflow. When the temperature of the battery module 108 is lower than the set minimum temperature, the first movable cover 1122 is controlled to be in the first position and the second movable cover 1124 is controlled to be in the fourth position, that is, the first movable cover 1122 is controlled to be in the open position and the second movable cover 1124 is controlled to be in the closed position. At the same time, the fan 114 is controlled to be turned on, so that the external air enters the second air duct through the first air duct. It can be understood that when the external air passes through the first air duct, it will be heated by the heat emitted by the energy storage inverter 104. Therefore, after entering the second air duct, the heated external air will use its own heat to heat the battery module 108, thereby increasing the temperature of the battery module 108.

[0045] This invention integrates heat dissipation fins 1022 into the housing 102, arranges the energy storage converter 104 and battery module 108 in a layered manner, and independently sets the first and second air ducts. The second air duct adopts a combination structure of a first movable cover 1122, a second movable cover 1124, and a fixed cover 1126 that can be switched on and off. This achieves flexible and controllable air duct structure and airflow path. It can form a directional and efficient heat dissipation channel for the energy storage converter 104, and can dynamically adjust the air duct conduction mode according to the temperature of the battery module 108. Without the need for additional heating / cooling components, it simultaneously meets the dual requirements of efficient heat dissipation of the energy storage converter and forced heat dissipation and self-heating of the battery module 108 at high temperatures. By independently partitioning the air ducts and opening and closing them on demand, unnecessary fan 114 operation is reduced from the source, significantly reducing the overall operating noise and optimizing heat dissipation power consumption. This allows the battery module 108 to remain stable in the optimal operating temperature range for a long time, effectively ensuring the performance and service life of the battery cells, and greatly improving the adaptability and user experience of the integrated energy storage unit 10 in various temperature environments around the world.

[0046] In some embodiments, optionally, such as Figure 2 As shown, the energy storage converter 104 includes at least two working modules 1042; the first air duct includes at least two independent air ducts, wherein each independent air duct corresponds to one working module 1042 and each independent air duct corresponds to at least one fan 114, wherein, based on the working mode of the energy storage unit 10 and the temperature of each working module 1042, the fan 114 corresponding to the working module 1042 switches between starting and not starting.

[0047] In this embodiment, the energy storage converter 104 includes at least two independent working modules 1042, each of which is a unit capable of performing a specific power conversion function. The first air duct is divided into at least two independent air ducts, each corresponding precisely to one working module 1042, and each independent air duct has at least one fan 114 positioned below it. During operation, the operating mode of the integrated energy storage unit 10 and the temperature of each working module 1042 are simultaneously collected. Based on the operating mode and the corresponding module temperature, the fan 114 corresponding to each air duct is independently controlled to start or stop. Simultaneously, each working module 1042 is equipped with an NTC (Negative Temperature Coefficient) temperature sensor to collect the temperature of each working module 1042 in real time. Each independent air duct is completely isolated from the others by a sealed partition to prevent airflow crosstalk and to prevent heat transfer from one working module 1042 to other modules. Each fan 114 supports PWM (Pulse Width Modulation) speed control, allowing the fan speed to be adjusted according to temperature. This invention sets independent air ducts for each working module 1042 in the energy storage converter 104, and then controls the operation of the corresponding fan 114 according to the temperature of different working modules 1042 and the working mode of the energy storage converter 104. That is, the corresponding fan 114 is started and stopped as needed, and only the working module 1042 that generates heat is cooled. The fan 114 corresponding to the working module 1042 that does not generate heat does not work, thereby balancing the heat dissipation effect with energy consumption and noise.

[0048] In some embodiments, optionally, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the energy storage converter 104 includes: a photovoltaic module 1044, a DC-DC step-up / step-down module 1046, and an AC / DC inverter module 1048 arranged in sequence; the first air duct includes: a third air duct, a fourth air duct, and a fifth air duct; the fan 114 includes: a first fan 1142, a second fan 1144, and a third fan 1146, wherein the third air duct, the fourth air duct, and the fifth air duct are independent of each other, the third air duct corresponds to the photovoltaic module 1044, the fourth air duct corresponds to the DC-DC step-up / step-down module 1046, and the fifth air duct corresponds to the AC / DC inverter module 1048; the first fan 1142 is located below the third air duct, the second fan 1144 is located below the fourth air duct, and the third fan 1146 is located below the fifth air duct.

[0049] In this embodiment, the energy storage converter 104 contains a photovoltaic module 1044, a DC-DC step-up / step-down module 1046, and an AC / DC inverter module 1048 arranged sequentially. The photovoltaic module 1044 converts photovoltaic DC power into DC power suitable for the device. The DC-DC step-up / step-down module adjusts the DC voltage amplitude to achieve voltage matching between the battery and the grid / photovoltaic system. The AC / DC inverter module converts DC power into AC power or vice versa to adapt to the grid and household loads. The first air duct is divided into three independent air ducts: a third air duct, a fourth air duct, and a fifth air duct. These three independent air ducts are arranged horizontally and parallel to each other along the housing 102, with widths matching the heating area of ​​the corresponding modules. They correspond to the photovoltaic module 1044, the DC-DC step-up / step-down module 1046, and the AC / DC inverter module 1048, respectively. The inner walls of the third, fourth, and fifth air ducts are treated with airflow guiding to reduce airflow resistance and improve heat dissipation efficiency. The heat-generating area of ​​the photovoltaic module 1044 is precisely aligned with the air inlet of the third air duct, the DC-DC buck-boost module 1046 is precisely aligned with the air inlet of the fourth air duct, and the AC-DC inverter module 1048 is precisely aligned with the air inlet of the fifth air duct, thus ensuring that the airflow directly blows onto the heat-generating core. Fans 114 are divided into a first fan 1142, a second fan 1144, and a third fan 1146. The first fan 1142 is located below the third air duct, the second fan 1144 is below the fourth air duct, and the third fan 1146 is below the fifth air duct. Each fan 114 is an axial fan, and its airflow is adapted to the heat dissipation requirements of the corresponding module, thus forming a one-to-one correspondence structure of three modules, three independent air ducts, and three independent fans 114. This invention, by setting a one-to-one correspondence structure, allows each working module 1042 to have its own dedicated heat dissipation system, independently cooling according to its own heat generation, preventing overheating of one module from affecting other modules, and improving the stability of the inverter.

[0050] Figure 10 A flowchart illustrating a method for controlling the air duct of an integrated energy storage device according to an embodiment of the present invention is shown; wherein, the method for controlling the air duct of the integrated energy storage device includes:

[0051] Step 1002: Obtain the first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module;

[0052] Step 1004: Control the first and second movable covers to switch between the open and closed positions according to the first temperature;

[0053] Step 1006: Control the operation of the first fan, the second fan, and the third fan according to the working mode, the second temperature, the third temperature, and the fourth temperature of the energy storage unit.

[0054] The present invention provides a duct control method for an integrated energy storage device, used in any of the above embodiments. The duct control method includes: firstly, acquiring in real-time the first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module. The photovoltaic module, the DC-DC buck-boost module, and the AC-DC inverter module are sequentially integrated into an energy storage converter. The first duct includes a third duct, a fourth duct, and a fifth duct. The third duct corresponds to the photovoltaic module, allowing air to pass through it for heat dissipation; the fourth duct corresponds to the DC-DC buck-boost module, allowing air to pass through it for heat dissipation; and the fifth duct corresponds to the AC-DC inverter module, allowing air to pass through it for heat dissipation. The fan includes a first fan, a second fan, and a third fan. The first fan is located below the third duct, allowing external air to enter the third duct for heat dissipation of the photovoltaic module when the first fan is activated. The second fan is located below the fourth air duct. When the second fan is turned on, outside air can enter the fourth air duct to dissipate heat from the DC-DC buck-boost module. The third fan is located below the fifth air duct. When the third fan is turned on, outside air can enter the fifth air duct to dissipate heat from the AC-DC inverter module. Subsequently, the first and second movable covers are switched between open and closed positions according to the first temperature control, so that the battery module can be cooled when the temperature is high and heated when the temperature is low, thus keeping the battery module at a suitable temperature. The operation of the first, second, and third fans can also be controlled according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature. For example, the first fan can be controlled according to the operating mode of the energy storage unit and the second temperature to dissipate heat from the photovoltaic module. The second fan can be controlled according to the operating mode of the energy storage unit and the third temperature to dissipate heat from the DC-DC buck-boost module. The third fan can be controlled according to the operating mode of the energy storage unit and the fourth temperature to dissipate heat from the AC-DC inverter module. This invention uses temperature as the core control basis, combines the working mode to determine the heat dissipation requirements, and adjusts in real time through closed-loop control to ensure that the core components are always at a suitable temperature, thereby improving the reliability of the equipment.

[0055] Optionally, the step of controlling the first movable cover and the second movable cover to switch between an open position and a closed position based on a first temperature includes: when the first temperature is greater than a first preset temperature, controlling both the first and second movable covers to be in the open position, and simultaneously controlling the first fan, the second fan, and the third fan to operate so that external airflow can dissipate heat from the battery module through the second air duct; when the first temperature is less than a second preset temperature, controlling the first movable cover to be in the open position, controlling the second movable cover to be in the closed position, and simultaneously controlling the first fan, the second fan, and the third fan to operate so that the heated airflow flowing through the first air duct can heat the battery module; when the temperature of the battery module is greater than the second preset temperature and less than the first preset temperature, controlling both the first and second movable covers to be in the closed position.

[0056] In this embodiment, the step of controlling the first movable cover and the second movable cover to switch between the open and closed positions according to the first temperature includes: when the first temperature is greater than the first preset temperature, wherein the first preset temperature is the high temperature warning value of the battery module, that is, when the first temperature is greater than the first preset temperature, it indicates that the battery module needs to dissipate heat. Therefore, the first movable cover and the second movable cover are both controlled to be in the open position, and the first fan, the second fan and the third fan are controlled to work at the same time, that is, all fans are started, so that the external cold air enters the second air duct from the second movable cover and directly forces heat dissipation for the battery module. When the first temperature is lower than the second preset temperature (where the second preset temperature is the low-temperature warning value for the battery module), indicating that the battery module needs heating, the first movable cover is opened and the second movable cover is closed. Simultaneously, the first, second, and third fans are activated, meaning all fans are started. This allows airflow to first absorb waste heat from the energy storage converter through the first air duct, then pass through the first movable cover into the second air duct to heat the battery module. When controlling the first, second, and third fans, they need to be reversed to guide the hot air precisely towards the battery module. When the first temperature is between the second and first preset temperatures (i.e., when the battery module temperature is at a suitable level), both movable covers are closed, and the fans can run at low speed or stop. This maintains a stable battery module temperature and reduces the entry of external dust into the energy storage unit. The specific values ​​of the first and second preset temperatures can be customized according to the type of cells in the battery module. For example, the first preset temperature can be set to 45°C and the second preset temperature can be set to 5°C. This invention uses a first and second movable cover to switch the airflow, introducing cool air for heat dissipation when the battery module is at a high temperature and utilizing the waste heat from the energy storage converter for heating when the battery module is at a low temperature. This eliminates the need for additional heating devices, ensuring the battery module always operates within its optimal temperature range.

[0057] In some embodiments, optionally, the step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: when the operating mode of the energy storage unit is photovoltaic charging mode, controlling the first fan to start according to the second temperature; controlling the second fan to start according to the third temperature; and controlling the third fan not to start.

[0058] In this embodiment, the steps of controlling the operation of the first, second, and third fans based on the operating mode of the energy storage unit, a second temperature, a third temperature, and a fourth temperature include: when the energy storage inverter is operating in photovoltaic charging mode, controlling the first fan to start or adjust its speed based on the second temperature of the photovoltaic module to dissipate heat from the photovoltaic module; and controlling the second fan to start or adjust its speed based on the third temperature of the DC-DC buck-boost module to dissipate heat from the DC-DC buck-boost module, while keeping the third fan off. It can be understood that photovoltaic charging mode refers to the operating state where the energy storage unit only collects solar energy through photovoltaic panels to charge the battery module. Therefore, when the energy storage inverter is operating in photovoltaic charging mode, the photovoltaic module and the DC-DC buck-boost module in the energy storage inverter are working, while the AC / DC inverter module is not working. Thus, when the energy storage inverter is operating in photovoltaic charging mode, controlling the first fan to start or adjust its speed based on the second temperature, and controlling the second fan to start or adjust its speed based on the third temperature, achieves precise fan control, balances fan operation and heat dissipation requirements, and optimizes noise levels, user experience, and heat dissipation power consumption.

[0059] In some embodiments, optionally, the step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: when the operating mode of the energy storage unit is photovoltaic grid-connected output mode, controlling the first fan to start according to the second temperature; controlling the third fan to start according to the fourth temperature; and controlling the second fan not to start.

[0060] In this embodiment, the steps of controlling the operation of the first, second, and third fans based on the operating mode, second temperature, third temperature, and fourth temperature of the integrated energy storage unit include: when the energy storage converter is operating in photovoltaic grid-connected output mode, controlling the first fan to start or adjust its speed according to the second temperature of the photovoltaic module to dissipate heat from the photovoltaic module; and controlling the third fan to start or adjust its speed according to the fourth temperature of the AC / DC inverter module to dissipate heat from the AC / DC inverter module, while controlling the second fan to remain stationary. It can be understood that photovoltaic grid-connected output mode refers to directly transmitting the electricity generated by the photovoltaic system to the grid for sale or supplying it to household loads connected to the grid. Therefore, when the energy storage converter is operating in photovoltaic grid-connected output mode, the photovoltaic module and AC / DC inverter module in the energy storage converter are operational, while the DC step-up / step-down module is not operational. Therefore, when the energy storage converter operates in photovoltaic grid-connected output mode, the first fan is started or its speed is adjusted according to the second temperature, and the third fan is started or its speed is adjusted according to the fourth temperature, thereby achieving precise control of the fans, balancing fan operation and heat dissipation needs, and optimizing noise, user experience and heat dissipation power consumption.

[0061] In some embodiments, optionally, the step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: when the operating mode of the energy storage unit is a bidirectional charging and discharging mode between the battery module and the grid, controlling the second fan to start according to the third temperature; controlling the third fan to start according to the fourth temperature; and controlling the first fan not to start.

[0062] In this embodiment, the steps of controlling the operation of the first, second, and third fans based on the operating mode, second temperature, third temperature, and fourth temperature of the integrated energy storage unit include: when the energy storage converter is operating in a bidirectional charging and discharging mode between the battery module and the grid, controlling the second fan to start or adjust its speed based on the third temperature of the DC-DC buck-boost module to dissipate heat from the DC-DC buck-boost module, and controlling the third fan to start or adjust its speed based on the fourth temperature of the AC-DC inverter module to dissipate heat from the AC-DC inverter module, while keeping the first fan off. It is understood that the bidirectional charging and discharging mode between the battery module and the grid refers to the operating state in which power is transmitted bidirectionally between the battery and the grid. Therefore, when the energy storage converter is operating in this mode, the DC-DC buck-boost module and the AC-DC inverter module in the energy storage converter are working, while the photovoltaic module is not. Therefore, when the energy storage converter operates in a bidirectional charging and discharging mode between the battery module and the grid, the second fan is started or its speed is adjusted according to the third temperature, and the third fan is started or its speed is adjusted according to the fourth temperature. This achieves precise control of the fans, balances the fan operation and heat dissipation requirements, and optimizes the noise experience and heat dissipation power consumption.

[0063] In some embodiments, optionally, the step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: controlling the first fan to start according to the second temperature when the operating mode of the energy storage unit is to simultaneously perform photovoltaic charging and grid feeding; controlling the second fan to start according to the third temperature; and controlling the third fan to start according to the fourth temperature.

[0064] In this embodiment, the steps of controlling the operation of the first, second, and third fans based on the operating mode, second temperature, third temperature, and fourth temperature of the integrated energy storage unit include: when the energy storage converter operates in a mode simultaneously performing photovoltaic charging and grid feeding, controlling the first fan to start or adjust its speed based on the second temperature of the photovoltaic module to dissipate heat from the photovoltaic module; controlling the second fan to start or adjust its speed based on the third temperature of the DC-DC buck-boost module to dissipate heat from the DC-DC buck-boost module; and controlling the third fan to start or adjust its speed based on the fourth temperature of the AC-DC inverter module to dissipate heat from the AC-DC inverter module. It is understood that the mode simultaneously performing photovoltaic charging and grid feeding refers to the integrated energy storage unit simultaneously completing a composite operation state of photovoltaic charging and grid feeding. Therefore, when the energy storage converter operates in this mode, the photovoltaic module, DC-DC buck-boost module, and AC-DC inverter module in the energy storage converter all operate. Therefore, when the energy storage converter simultaneously performs photovoltaic charging and grid feeding, the first fan is started or its speed is adjusted according to the second temperature, the second fan is started or its speed is adjusted according to the third temperature, and the third fan is started or its speed is adjusted according to the fourth temperature. This achieves precise control of the fans, balances the fan operation and heat dissipation requirements, and optimizes the noise experience and heat dissipation power consumption.

[0065] In some embodiments, when the energy storage converter is in standby mode, that is, when the photovoltaic module, DC buck-boost module and AC / DC inverter module in the energy storage converter are not working, the first fan, the second fan and the third fan are all stopped to reduce power consumption.

[0066] Figure 11 A schematic block diagram of the air duct control system of an integrated energy storage device according to an embodiment of the present invention is shown. The air duct control system of the integrated energy storage device is used in any of the above embodiments. The air duct control system 1100 of the integrated energy storage device includes:

[0067] The first acquisition module 1102 is used to acquire the first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module.

[0068] The first processing module 1104 is used to control the first movable cover and the second movable cover to switch between the open position and the closed position according to the first temperature.

[0069] The second processing module 1106 is used to control the operation of the first fan, the second fan, and the third fan according to the working mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature.

[0070] The present invention provides an air duct control system 1100 for an integrated energy storage device, used in any of the above embodiments. The air duct control system 1100 includes: a first acquisition module 1102, a first processing module 1104, and a second processing module 1106. The first acquisition module 1102 first acquires in real-time the first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module. The photovoltaic module, the DC-DC buck-boost module, and the AC-DC inverter module are sequentially integrated into the energy storage converter. The first air duct includes a third air duct, a fourth air duct, and a fifth air duct. The third air duct corresponds to the photovoltaic module, meaning that air passing through the third air duct can dissipate heat from the photovoltaic module; the fourth air duct corresponds to the DC-DC buck-boost module, meaning that air passing through the fourth air duct can dissipate heat from the DC-DC buck-boost module; and the fifth air duct corresponds to the AC-DC inverter module, meaning that air passing through the fifth air duct can dissipate heat from the AC-DC inverter module. The fan includes a first fan, a second fan, and a third fan. The system comprises the following components: a first fan located below the third air duct, allowing outside air to enter and cool the photovoltaic module when activated; a second fan located below the fourth air duct, allowing outside air to enter and cool the DC-DC buck-boost module when activated; and a third fan located below the fifth air duct, allowing outside air to enter and cool the AC-DC inverter module when activated. The first processing module 1104 controls the first and second movable covers to switch between open and closed positions based on a first temperature, enabling heat dissipation when the battery module temperature is high and heating when the battery module temperature is low, thus maintaining the battery module at a suitable temperature. The second processing module 1106 can then control the operation of the first, second, and third fans based on the energy storage unit's operating mode, the second temperature, the third temperature, and the fourth temperature. For example, the first fan can be controlled based on the energy storage unit's operating mode and the second temperature to cool the photovoltaic module. The second fan can be activated based on the operating mode of the energy storage unit and the third temperature control to dissipate heat from the DC-DC buck-boost module. The third fan can be activated based on the operating mode of the energy storage unit and the fourth temperature control to dissipate heat from the AC-DC inverter module. This invention uses temperature as the core control basis, combined with the operating mode to determine heat dissipation requirements, and adjusts in real time through closed-loop control to ensure that core components are always at a suitable temperature, thus improving equipment reliability.

[0071] Optionally, in some embodiments, the first processing module 1104 is specifically configured to: control both the first and second movable covers to be in the open position when the first temperature is greater than the first preset temperature, and simultaneously control the first, second, and third fans to operate so that external airflow can dissipate heat from the battery module through the second air duct; control the first movable cover to be in the open position and the second movable cover to be in the closed position when the first temperature is less than the second preset temperature, and simultaneously control the first, second, and third fans to operate so that the heated airflow flowing through the first air duct can heat the battery module; and control both the first and second movable covers to be in the closed position when the temperature of the battery module is greater than the second preset temperature but less than the first preset temperature.

[0072] In this embodiment, the first processing module 1104 is specifically used to control the first movable cover and the second movable cover to be in the open position, and simultaneously control the first fan, the second fan and the third fan to work, that is, to start all the fans, so that the external cold air enters the second air duct from the second movable cover and directly forces the battery module to dissipate heat. When the first temperature is lower than the second preset temperature (where the second preset temperature is the low-temperature warning value for the battery module), indicating that the battery module needs heating, the first movable cover is opened and the second movable cover is closed. Simultaneously, the first, second, and third fans are activated, meaning all fans are started. This allows airflow to first absorb waste heat from the energy storage converter through the first air duct, then pass through the first movable cover into the second air duct to heat the battery module. When controlling the first, second, and third fans, they need to be reversed to guide the hot air precisely towards the battery module. When the first temperature is between the second and first preset temperatures (i.e., when the battery module temperature is at a suitable level), both movable covers are closed, and the fans can run at low speed or stop. This maintains a stable battery module temperature and reduces the entry of external dust into the energy storage unit. The specific values ​​of the first and second preset temperatures can be customized according to the type of cells in the battery module. For example, the first preset temperature can be set to 45°C and the second preset temperature can be set to 5°C. This invention uses a first and second movable cover to switch the airflow, introducing cool air for heat dissipation when the battery module is at a high temperature and utilizing the waste heat from the energy storage converter for heating when the battery module is at a low temperature. This eliminates the need for additional heating devices, ensuring the battery module always operates within its optimal temperature range.

[0073] In some embodiments, optionally, the second processing module 1106 is specifically configured to, when the working mode of the energy storage unit is photovoltaic charging mode, control the first fan to start according to a second temperature; control the second fan to start according to a third temperature; and control the third fan not to start.

[0074] In this embodiment, the second processing module 1106 is specifically used to control the first fan to start or adjust its speed based on the second temperature of the photovoltaic module when the energy storage inverter is operating in photovoltaic charging mode, in order to dissipate heat from the photovoltaic module; and to control the second fan to start or adjust its speed based on the third temperature of the DC-DC buck-boost module, in order to dissipate heat from the DC-DC buck-boost module, while keeping the third fan off. It can be understood that photovoltaic charging mode refers to the operating state where the energy storage unit only collects solar energy through photovoltaic panels to charge the battery module. Therefore, when the energy storage inverter is operating in photovoltaic charging mode, the photovoltaic module and the DC-DC buck-boost module in the energy storage inverter are working, while the AC / DC inverter module is not working. Thus, by controlling the first fan to start or adjust its speed based on the second temperature and the second fan to start or adjust its speed based on the third temperature when the energy storage inverter is operating in photovoltaic charging mode, precise fan control is achieved, balancing fan operation and heat dissipation requirements, and optimizing noise levels, user experience, and power consumption.

[0075] In some embodiments, optionally, the second processing module 1106 is further configured to, when the working mode of the energy storage unit is photovoltaic grid-connected output mode, control the first fan to start according to the second temperature; control the third fan to start according to the fourth temperature; and control the second fan not to start.

[0076] In this embodiment, the second processing module 1106 is further specifically used to, when the energy storage converter is operating in photovoltaic grid-connected output mode, control the first fan to start or adjust its speed based on the second temperature of the photovoltaic module to dissipate heat from the photovoltaic module, and control the third fan to start or adjust its speed based on the fourth temperature of the AC / DC inverter module to dissipate heat from the AC / DC inverter module, while controlling the second fan to remain off. It can be understood that photovoltaic grid-connected output mode refers to directly transmitting the electricity generated by the photovoltaic system to the grid for sale or supply to household loads connected to the grid. Therefore, when the energy storage converter is operating in photovoltaic grid-connected output mode, the photovoltaic module and AC / DC inverter module in the energy storage converter operate, while the DC step-up / step-down module does not operate. Thus, by controlling the first fan to start or adjust its speed based on the second temperature and the third fan to start or adjust its speed based on the fourth temperature when the energy storage converter is operating in photovoltaic grid-connected output mode, precise fan control is achieved, balancing fan operation and heat dissipation needs, and optimizing noise levels, user experience, and power consumption.

[0077] In some embodiments, optionally, the second processing module 1106 is further configured to, when the working mode of the energy storage unit is a bidirectional charging and discharging mode between the battery module and the grid, control the second fan to start according to a third temperature; control the third fan to start according to a fourth temperature; and control the first fan not to start.

[0078] In this embodiment, the second processing module 1106 is further specifically used to control the second fan to start or adjust its speed based on the third temperature of the DC-DC buck-boost module when the energy storage converter is operating in the bidirectional charging and discharging mode between the battery module and the grid, in order to dissipate heat from the DC-DC buck-boost module; and to control the third fan to start or adjust its speed based on the fourth temperature of the AC-DC inverter module, in order to dissipate heat from the AC-DC inverter module, while controlling the first fan to remain off. It can be understood that the bidirectional charging and discharging mode between the battery module and the grid refers to the operating state in which power is transmitted bidirectionally between the battery and the grid. Therefore, when the energy storage converter is operating in this mode, the DC-DC buck-boost module and the AC-DC inverter module in the energy storage converter are working, while the photovoltaic module is not. Thus, by controlling the second fan to start or adjust its speed based on the third temperature and the third fan to start or adjust its speed based on the fourth temperature when the energy storage converter is operating in this mode, precise fan control is achieved, balancing fan operation and heat dissipation requirements, and optimizing noise levels, user experience, and power consumption.

[0079] Optionally, in some embodiments, the second processing module 1106 is further configured to, when the working mode of the energy storage unit is to simultaneously perform photovoltaic charging and grid feeding, control the first fan to start according to a second temperature; control the second fan to start according to a third temperature; and control the third fan to start according to a fourth temperature.

[0080] In this embodiment, the second processing module 1106 is further specifically used to control the first fan to start or adjust its speed based on the second temperature of the photovoltaic module when the energy storage converter is operating in a mode that simultaneously performs photovoltaic charging and grid feeding, in order to dissipate heat from the photovoltaic module. Based on the third temperature of the DC-DC buck-boost module, it controls the second fan to start or adjust its speed to dissipate heat from the DC-DC buck-boost module, and based on the fourth temperature of the AC / DC inverter module, it controls the third fan to start or adjust its speed to dissipate heat from the AC / DC inverter module. It can be understood that the mode of simultaneously performing photovoltaic charging and grid feeding refers to the combined operation state of the integrated energy storage device simultaneously completing photovoltaic charging and grid feeding. Therefore, when the energy storage converter is operating in this mode, the photovoltaic module, DC-DC buck-boost module, and AC / DC inverter module in the energy storage converter are all working. Therefore, when the energy storage converter simultaneously performs photovoltaic charging and grid feeding, the first fan is started or its speed is adjusted according to the second temperature, the second fan is started or its speed is adjusted according to the third temperature, and the third fan is started or its speed is adjusted according to the fourth temperature. This achieves precise control of the fans, balances the fan operation and heat dissipation requirements, and optimizes the noise experience and heat dissipation power consumption.

[0081] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, unless otherwise expressly specified and limited. The terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0082] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated energy storage unit, characterized in that, include: The housing has heat dissipation fins on its exterior. An energy storage converter, wherein the energy storage converter is disposed inside the housing; A battery module is disposed inside the housing and located below the energy storage converter; The first air duct cover plate is disposed on the outside of the housing and is disposed opposite to the energy storage converter. The first air duct cover plate and the heat dissipation fins form a first air duct. The second air duct cover is disposed on the outside of the housing and opposite to the battery module. The second air duct cover and the heat dissipation fins form a second air duct. A fan is disposed between the first air duct and the second air duct; The second air duct cover includes a first movable cover, a second movable cover, and a fixed cover. The first movable cover and the second movable cover are movably connected to the fixed cover. When the first movable cover is in the open position, the first air duct and the second air duct are connected. When the second movable cover is in the open position, external air can enter the second air duct. The first movable cover and the second movable cover switch between the open position and the closed position based on the temperature of the battery module.

2. The integrated energy storage unit according to claim 1, characterized in that, The energy storage converter includes at least two working modules; the first air duct includes at least two independent air ducts, wherein each independent air duct corresponds to one of the working modules and each independent air duct corresponds to at least one of the fans, wherein the fan corresponding to the working module switches between starting and not starting based on the working mode of the energy storage unit and the temperature of each working module.

3. The integrated energy storage unit according to claim 2, characterized in that, The energy storage converter includes: a photovoltaic module, a DC-DC step-up / step-down module, and an AC / DC inverter module arranged in sequence; the first air duct includes: a third air duct, a fourth air duct, and a fifth air duct; the fan includes: a first fan, a second fan, and a third fan, wherein the third air duct, the fourth air duct, and the fifth air duct are independent of each other, the third air duct corresponds to the photovoltaic module, the fourth air duct corresponds to the DC-DC step-up / step-down module, and the fifth air duct corresponds to the AC / DC inverter module; the first fan is located below the third air duct, the second fan is located below the fourth air duct, and the third fan is located below the fifth air duct.

4. A method for controlling the air duct of an integrated energy storage unit, used in any one of claims 1 to 3, characterized in that, include: The first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module are obtained. Based on the first temperature, the first and second movable covers switch between open and closed positions; The first fan, the second fan, and the third fan are controlled to operate according to the working mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature.

5. The air duct control method for the integrated energy storage unit according to claim 4, characterized in that, The step of controlling the first and second movable covers to switch between open and closed positions based on the first temperature includes: When the first temperature is greater than the first preset temperature, the first movable cover and the second movable cover are both controlled to be in the open position, and the first fan, the second fan and the third fan are controlled to work so that the external airflow can dissipate heat from the battery module through the second air duct. When the first temperature is lower than the second preset temperature, the first movable cover is controlled to be in the open position, the second movable cover is controlled to be in the closed position, and the first fan, the second fan and the third fan are controlled to work so that the heating airflow flowing through the first air duct heats the battery module. When the temperature of the battery module is greater than the second preset temperature but less than the first preset temperature, both the first movable cover and the second movable cover are controlled to be in the closed position.

6. The air duct control method for the integrated energy storage unit according to claim 5, characterized in that, The step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: When the energy storage unit is in photovoltaic charging mode, the first fan is started according to the second temperature control. The second fan is started according to the third temperature control. Control the third fan to not start.

7. The air duct control method for the integrated energy storage unit according to claim 5, characterized in that, The step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: When the energy storage unit operates in photovoltaic grid-connected output mode, the first fan is started according to the second temperature control. The third fan is started according to the fourth temperature control. Control the second fan to not start.

8. The air duct control method for the integrated energy storage unit according to claim 5, characterized in that, The step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: When the working mode of the energy storage unit is a bidirectional charging and discharging mode between the battery module and the power grid, the second fan is started according to the third temperature control. The third fan is started according to the fourth temperature control. Control the first fan to not start.

9. The air duct control method for the integrated energy storage unit according to claim 5, characterized in that, The step of controlling the operation of the first fan, the second fan, and the third fan according to the operating mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature includes: When the energy storage unit operates in a mode that simultaneously performs photovoltaic charging and grid power feeding, the first fan is started according to the second temperature control. The second fan is started according to the third temperature control. The third fan is started according to the fourth temperature control.

10. A duct control system for an integrated energy storage unit, used in any one of claims 1 to 3, characterized in that, The air duct control system of the energy storage unit includes: The first acquisition module is used to acquire the first temperature of the battery module, the second temperature of the photovoltaic module, the third temperature of the DC-DC buck-boost module, and the fourth temperature of the AC-DC inverter module. A first processing module is configured to control the first movable cover and the second movable cover to switch between an open position and a closed position based on the first temperature. The second processing module is used to control the operation of the first fan, the second fan, and the third fan according to the working mode of the energy storage unit, the second temperature, the third temperature, and the fourth temperature.

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