Energy storage cabinet and cabinet body and battery module thereof

Abstract

The utility model relates to an energy storage cabinet, a cabinet body thereof and a battery module, and belongs to the field of energy storage devices. At least one group of battery module mounting spaces arranged in the vertical direction is arranged in a frame of the energy storage cabinet, heat exchange air channels arranged in the vertical direction are formed in the positions, on the two sides of each group of battery module mounting spaces, of the frame, and air flow spraying holes are formed in the area, facing battery modules, of each heat exchange air channel. Heat exchange air suction inlets are formed in the spaced side faces between the front and rear battery single bodies of the battery module, an air path is arranged in the battery module, and an exhaust fan communicated with the air path is arranged at the front end of the battery module. Due to the fact that the air flow spraying holes are directly formed in the frame, loss of heat exchange air pressure is avoided, and the problem that in the prior art, air flow channels are limited by the box bodies of the battery module, leakage occurs between the box bodies, and consequently the exhaust pressure of the air flow channels from top to bottom is different is solved.

Description

Technical Field

[0001] The utility model relates to an energy storage cabinet, a cabinet body thereof and a battery module, and belongs to the field of energy storage devices. Background Art

[0002] With the growing emphasis on renewable energy sources such as wind and solar power, an increasing number of solar and wind power stations have emerged. However, the power generation capacity of these stations is intermittent and uncontrollable, fluctuating significantly with daytime and weather conditions. Therefore, energy storage cabinets are often included in the construction of these stations. Energy storage cabinets are used to store and release electricity, and a single cabinet typically contains multiple battery modules. When the power station's generated power exceeds actual demand, the excess power is stored in the energy storage cabinets. When the power station's generated power falls short of actual demand, the stored energy is quickly released to compensate for the shortfall, ultimately achieving a stable power supply.

[0003] Energy storage cabinets generate a large amount of heat during the charging and discharging process. If this heat cannot be dissipated in time, it will accumulate, causing the battery temperature to rise and the temperature difference to increase, affecting the charging and discharging performance of the energy storage system. In serious cases, it may even cause safety issues. Therefore, energy storage cabinets are generally equipped with heat dissipation structures. For example, the Chinese utility model patent with an authorization announcement date of March 14, 2023 and authorization announcement number CN218632280U discloses a battery cabinet and containerized energy storage system. The energy storage system includes a cage-shaped mounting bracket (i.e., a frame) comprising columns, longitudinal beams, and cross beams. In addition, side panels are provided on the outermost side of the frame. This structure can define multiple compartments for the placement of battery modules. The battery module includes a housing and a battery cluster disposed within it. Vertically arranged air inlets are provided on the sidewalls of the housing, parallel to the side panels. Exhaust vents are provided on the front sidewalls of the housing. The battery cluster comprises two rows of multiple battery cells arranged front and back, with internal heat dissipation channels formed between the two rows of battery cells. The exhaust vents on the housing correspond to the internal heat dissipation channels, facilitating the extraction of gas from the battery cluster, thereby allowing external cool air to re-enter the batteries. Batteries generate significant heat, and simple air cooling can only remove a limited amount of heat. Therefore, the energy storage system also includes an air conditioner. The air conditioner's outlet blows cool air into the energy storage cabinet via an air guide module. Cool air from the air guide module flows through airflow channels into the battery housing. Airflow channels are formed between the battery housing and the side panels, as well as between adjacent battery housings. Cool air from the air conditioner passes through the air guide module, enters the airflow channels, and finally flows into the housing. When cooling is required, on the one hand, the air conditioner generates cold air that is introduced into the energy storage cabinet through the air guide module and then into the box. On the other hand, the exhaust fan of the battery cluster in the box works, forming a negative pressure inside the battery cluster, actively drawing the external cold air into the battery cluster and then exhausting this cold air outward through the exhaust fan. During the flow of cold air, heat exchange occurs between the cold air and the battery cells, transferring the heat from charging and discharging.

[0004] In the above technical solution, in order for the cold air flowing out of the air guide outlet of the air guide module to flow into the box, it needs to pass through the air flow channel surrounded by the side walls of the box. The box of the battery module is independently provided, that is, the air flow channel itself is not continuous, and there will be a gap between the bottom plate and the top plate of the box. In the process of the cold air flowing from top to bottom in the air flow channel, part of the cold air will enter the box of the battery module, and part of it will enter between the boxes arranged at intervals above and below. The exhaust port is located on the side wall of the box, and then the air is discharged outward, which will cause waste of cold air and loss of air intake pressure. At the same time, a separate box is provided on the battery module, and the gas channel is defined by the boxes between adjacent battery modules. This will result in the use of more materials, making the overall mass of the energy storage cabinet larger. In addition, when a battery cell in the battery module has a problem and needs to be repaired and replaced, the battery box needs to be disassembled first, and then the box needs to be fixed to the periphery of the battery cell after the repair is completed, which makes the operation more cumbersome. Utility Model Content

[0005] The present invention aims to provide an energy storage cabinet that solves the problem in the prior art where the airflow passage is limited by the battery module housing, resulting in leakage between the housings and causing different exhaust pressures in the airflow passage from top to bottom. The present invention also aims to provide a battery module for an energy storage cabinet that, when used in conjunction with a corresponding cabinet, solves the aforementioned technical problem. The present invention also aims to provide an energy storage cabinet body that, when used in conjunction with a corresponding battery module, solves the aforementioned technical problem.

[0006] To achieve the above objectives, the energy storage cabinet in this utility model adopts the following technical solutions:

[0007] An energy storage cabinet is provided with at least one group of battery module installation spaces arranged in an up-down direction within its frame, heat exchange air passages arranged in an up-down direction are provided on the frames on both sides of each group of battery module installation spaces, air flow nozzles are provided at least in the area of ​​the side facing the battery module on the partition facing the battery module installation space of each heat exchange air passage, a gap is provided between the partition and the side of the corresponding battery module, each battery module is installed in the corresponding battery module installation space by two longitudinal beams arranged in the depth direction on the frame, each battery module has a battery cell and a tray for holding the battery cell, the tray is installed on the corresponding longitudinal beam, a heat exchange air intake is provided on the side between the battery cells in front and behind the battery module, an air path is provided inside the battery module, and an exhaust fan connected to the air path is provided at the front end of the battery module.

[0008] Furthermore, the air flow nozzles are arranged in groups, and multiple groups of air flow nozzles are arranged horizontally at intervals. The air flow nozzles in each group are circular holes or polygonal holes arranged vertically at intervals so as to correspond to the heat exchange air intake in the battery module when in use.

[0009] Furthermore, the air flow nozzle is a vertically arranged long hole, and multiple air flow nozzles are arranged horizontally at intervals so as to correspond to the heat exchange air intake inlets in the battery module respectively when in use.

[0010] Furthermore, the air flow nozzles are long holes corresponding to the depth direction of the battery module and extending horizontally, and a plurality of air flow nozzles are arranged vertically at intervals.

[0011] Furthermore, the tray is in sliding or rolling engagement with the longitudinal beam, and the bottom surface and / or side surfaces of the tray are used for sealing contact engagement with the longitudinal beam.

[0012] Furthermore, the longitudinal beam includes a horizontally arranged supporting plate and a vertically arranged limiting plate, and the tray includes a vertically arranged flange located outside the battery cell.

[0013] Furthermore, the battery module includes a panel located at the front end of the battery module, an exhaust port corresponding to the exhaust fan is provided in the middle of the panel, and an annular sealing area for sealing with the frame is provided on the rear side of the panel.

[0014] Furthermore, a heat sink is provided between the battery cells of the battery module, a horizontally extending air duct is provided on the heat sink, and an air duct inlet on the heat sink constitutes the heat exchange air intake.

[0015] Furthermore, a top plate is provided above the topmost battery module of a group of battery modules on the frame, and two sides of the top plate are respectively fitted and fixed to the partitions.

[0016] The beneficial effects of the energy storage cabinet in the present invention are as follows: the present invention pioneers an energy storage cabinet, which forms a battery module installation space on a frame for installing battery modules arranged in an upper and lower direction; arranges heat exchange air channels on both sides of the frame located at the battery module installation space to facilitate the transportation of heat exchange air in the frame, and arranges air flow nozzles on the partitions on the sides of the frame corresponding to the battery modules to facilitate the spraying of these air flows onto the battery modules. When delivering cold air, it can cool and dissipate heat for the battery modules, and when delivering warm air, it can heat and keep the battery modules warm to maintain the battery modules in a working environment with a relatively suitable temperature; since there is a gap between the partition and the corresponding battery module, on the one hand, it is convenient to form a complete flow channel, and on the other hand, it can also The sides of the battery module are insulated or cooled; the battery module is easily arranged in the corresponding battery module installation space by setting the longitudinal beam; a heat exchange air intake port is provided between the battery cells in front and behind the battery module, and an exhaust fan is provided at the front end of the battery module to facilitate negative pressure suction, so that the heat exchange air flowing out of the heat exchange air channel can enter from the heat exchange air intake port on the side of the battery module and flow out from the exhaust fan at the front end of the battery module, thereby keeping the inside of the battery module warm or cooling down. Since the air flow nozzles are directly formed on the frame, the loss of heat exchange air pressure is avoided, thereby solving the problem in the prior art that the air flow channel is limited by the box body of the battery module and leaks between the boxes, resulting in different exhaust pressures of the air flow channel from top to bottom.

[0017] To achieve the above objectives, the battery module for the energy storage cabinet in the present invention adopts the following technical solutions:

[0018] A battery module for an energy storage cabinet includes battery cells and a tray. The tray has a support portion for supporting the longitudinal beam of the energy storage cabinet. Adjacent battery cells are arranged at intervals to form a heat exchange air intake between the battery cells for heat exchange air to pass through. An exhaust fan is provided at the front end of the battery module to form an air path inside the battery module with air entering from the side and exiting from the front end.

[0019] Furthermore, the battery module includes a panel located at the front end of the battery module, an exhaust port corresponding to the exhaust fan is provided in the middle of the panel, and an annular sealing belt for sealing with the frame is provided on the rear side of the panel.

[0020] Furthermore, a heat sink is provided between the battery cells of the battery module, a horizontally extending air duct is provided on the heat sink, and an air duct inlet on the heat sink constitutes the heat exchange air intake.

[0021] The beneficial effects of the battery module for the energy storage cabinet in the present invention are as follows: the present invention is a pioneering invention, and modular design is facilitated by providing battery cells and a tray, and a support portion is provided on the tray to prevent the battery from directly contacting the cabinet body when the battery module is installed in the cabinet body of the energy storage cabinet; a heat exchange air intake port for heat exchange air to pass through is formed between the battery cells by arranging two adjacent battery cells at intervals, and an exhaust fan is provided at the front end of the battery module for exhausting air outwards. During the exhaust process, negative pressure is generated inside the battery, which, on the one hand, discharges the air in the battery module, and on the other hand, draws the heat exchange air from the heat exchange air intake port, thereby facilitating the formation of a complete gas flow channel. Furthermore, when the cabinet body of the corresponding energy storage cabinet is adapted, the present invention can solve the problem in the prior art that the air flow channel is limited by the box body of the battery module and leaks between the boxes, resulting in different exhaust pressures in the air flow channel from top to bottom.

[0022] To achieve the above objectives, the energy storage cabinet in the present invention adopts the following technical solutions:

[0023] A cabinet body of an energy storage cabinet includes a frame, in which at least one group of battery module installation spaces arranged in the vertical direction is provided. Heat exchange air channels arranged in the vertical direction are provided on the frames on both sides of each group of battery module installation spaces. Air flow nozzles are arranged on the partitions of each heat exchange air channel facing the battery module installation space, at least in the area on the side facing the battery module. The partitions are used to cooperate with the side clearances of the battery modules. The frame is provided with longitudinal beams arranged in the depth direction. The longitudinal beams are arranged in groups of two in the same height direction to support the corresponding battery modules.

[0024] Furthermore, the air flow nozzles are arranged in groups, and multiple groups of air flow nozzles are arranged horizontally at intervals. The air flow nozzles in each group are circular holes or polygonal holes arranged vertically at intervals so as to correspond to the heat exchange air intake in the battery module when in use.

[0025] Furthermore, the air flow nozzle is a vertically arranged long hole, and multiple air flow nozzles are arranged horizontally at intervals so as to correspond to the heat exchange air intake inlets in the battery module respectively when in use.

[0026] Furthermore, the air flow nozzles are long holes corresponding to the depth direction of the battery module and extending horizontally, and a plurality of air flow nozzles are arranged vertically at intervals.

[0027] Furthermore, a top plate is provided above the topmost battery module of a group of battery modules on the frame, and two sides of the top plate are respectively fitted and fixed to the partitions.

[0028] The beneficial effects of the energy storage cabinet body of the present invention are as follows: the present invention improves the energy storage cabinet body of the prior art by forming battery module mounting spaces on the frame for mounting battery modules arranged in a vertical direction; heat exchange air ducts are arranged on both sides of the frame located in the battery module mounting spaces to facilitate the delivery of heat exchange air within the frame; and air flow nozzles are arranged on the partitions on the sides of the frame corresponding to the battery modules to facilitate the spraying of this air flow onto the battery modules. When delivering cold air, the battery modules can be cooled and dissipated; when delivering warm air, the battery modules can be heated and insulated to maintain a relatively suitable operating temperature for the battery modules; the gaps between the partitions and the corresponding battery modules facilitate the formation of a complete flow channel and also insulate or cool the sides of the battery modules; the provision of longitudinal beams facilitates the placement of the battery modules in the corresponding battery module mounting spaces; and the formation of air flow nozzles directly on the frame avoids loss of heat exchange air pressure. Furthermore, when combined with the corresponding battery modules, the problem of different exhaust pressures in the air flow channel from top to bottom caused by leakage between the boxes due to the air flow channel being defined by the battery module box in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of an embodiment of an energy storage cabinet in the present utility model;

[0030] Figure 2 This is a structural diagram of an embodiment of the energy storage cabinet in the present utility model (an air guide plate is hidden);

[0031] Figure 3 This is a schematic structural diagram of a cabinet body of an embodiment of an energy storage cabinet in the present utility model;

[0032] Figure 4 This is a schematic structural diagram of the cabinet body of an embodiment of the energy storage cabinet in the present utility model (an air guide plate is hidden);

[0033] Figure 5 This is a schematic structural diagram of the cabinet body of an embodiment of the energy storage cabinet in the present utility model (the air guide is hidden);

[0034] Figure 6 This is a schematic structural diagram of the air guide plate in the cabinet body of an embodiment of the energy storage cabinet in the present utility model;

[0035] Figure 7 This is a structural schematic diagram of another embodiment of the air guide plate in the cabinet body of the energy storage cabinet of the present utility model;

[0036] Figure 8 This is a structural schematic diagram of another embodiment of the air guide plate in the cabinet body of the energy storage cabinet of the present utility model;

[0037] Figure 9 This is a schematic structural diagram of an air guide member in a cabinet body of an embodiment of an energy storage cabinet in the present utility model;

[0038] Figure 10 This is a schematic structural diagram of a battery module in an embodiment of an energy storage cabinet in the present utility model;

[0039] Figure 11 This is a schematic diagram of the heat insulation board structure in the battery module of an embodiment of the energy storage cabinet in the utility model;

[0040] Figure 12 A simulation model diagram of the cabinet body of an embodiment of the energy storage cabinet in the present utility model;

[0041] Figure 13 This is a schematic diagram of the test results of the air output of the energy storage cabinet in the present invention under different apertures of the air guide plate (double-sided heat dissipation support);

[0042] Figure 14 This is a schematic diagram of the test results of the air output of the energy storage cabinet in the present invention under different apertures of the air guide plate (single-sided heat dissipation support);

[0043] Figure 15 This is a schematic diagram of the test results of the air outlet resistance of the air guide plate of the energy storage cabinet in the present invention with different apertures;

[0044] Figure 16 The simulation results of the airflow field of the energy storage cabinet in the present invention are as follows;

[0045] Figure 17 This is a schematic diagram of the air flow streamline distribution of the energy storage cabinet in the present invention.

[0046] In the figure: 1. Cabinet; 11. Horizontal beam; 12. Longitudinal beam; 13. Vertical column; 14. Top plate; 2. Battery module; 21. Battery cell; 22. Heat sink; 23. Exhaust fan; 24. Panel; 25. Middle air duct; 26. Tray; 31. Single-side air outlet baffle; 32. Double-side air outlet baffle; 33. Air guide plate; 34. Air flow nozzle; 4. Air guide piece; 41. Air duct inlet; 42. Air duct outlet. DETAILED DESCRIPTION

[0047] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0048] In the utility model, a partition composed of air guide plates arranged at intervals is provided on the frame, so that a heat exchange air channel for the heat exchange air to pass through is formed inside the partition, so that the air can only be discharged outward at the air flow nozzles in the heat exchange outlet area to keep the battery module warm or dissipate heat, thereby avoiding the loss of air and pressure during the movement of the heat exchange air from top to bottom.

[0049] In the embodiment 1 of the energy storage cabinet of the present invention:

[0050] In this embodiment, Figure 1 and Figure 2 As shown, the energy storage cabinet includes a cabinet body 1 and battery modules 2 arranged in the cabinet body 1. The battery modules 2 are divided into two groups, and the two groups of battery modules 2 are stacked from top to bottom in the cabinet body. In order to facilitate better heat dissipation, an air conditioner (not shown in the figure) and an air guide 4 connected to the air outlet of the air conditioner are also provided. The air guide 4 is used to convert the unidirectional air outlet of the same air conditioner into multi-directional air outlet, which facilitates the heat dissipation of the battery modules 2 at different positions.

[0051] Specifically, if Figure 3 、 Figure 4 and Figure 5 As shown, the cabinet 1 has a cubic appearance. The cabinet 1 includes a frame, which includes horizontally arranged longitudinal beams 12 and transverse beams 11, as well as vertically arranged columns 13. The basic skeleton of the cabinet is formed by the arrangement of the frame. In addition, partitions are also provided on the frame, specifically, partitions are also provided between the longitudinal beams 12, transverse beams 11 and columns 13. There are three partitions, two of which are located at the outermost sides of the box body and also constitute the left and right walls of the cabinet 1. There is also a partition parallel to the left and right walls and located between the two side walls. In addition, a rear side wall is also provided at the rear of the frame. The cabinet 1 also essentially constitutes a cage-like structure, forming a compartment inside the cabinet 1 for placing the battery module 2. The battery module 2 can be arranged in the cabinet 1 along the front-to-back direction to facilitate the inspection and maintenance of the battery module 2. Of course, in other embodiments, the transverse beam may no longer be provided, and the entire battery module is placed directly on the longitudinal beam.

[0052] The longitudinal beam 12 of the cabinet 1 includes a horizontally arranged support plate and a vertically arranged limit plate. The support plate and the limit plate constitute a longitudinal beam 12 with an L-shaped cross section. One side of the L-shape of the longitudinal beam 12 is used to support the battery module 2, and the other side of the L-shape of the longitudinal beam 12 is used to be fixedly connected to the column 13 of the cabinet 1. The plate surface of the partition is used to fit with the plate surface of the limit plate of the longitudinal beam. The longitudinal beam 12 also constitutes a guide rail for facilitating the forward and backward movement of the battery module 2. At the same time, in order to facilitate the passage of airflow, the upper surface of the transverse plate of the longitudinal beam 12 used to support the battery module 2 is sealed with the battery module. Alternatively, in other embodiments, an L-shaped longitudinal beam may no longer be provided, but a square tubular longitudinal beam may be provided. The upper surface of the longitudinal beam is used to seal with the battery module to form a second sealing surface. Alternatively, in other embodiments, the plate surface of the limit plate of the longitudinal beam is sealed with the side of the tray. In this case, rollers can be installed at the bottom of the tray to cooperate with the cabinet in a rolling manner.

[0053] like Figure 5 、 Figure 6 and Figure 9As shown, the partition includes two air guide plates 33 arranged at intervals. The two sides of the partition are respectively connected to the pillars 13. The two air guide plates 33 arranged at intervals form a channel for air to pass through inside the partition. In this embodiment, the air blown out by the air conditioner is used as an example for description. The upper end opening of the partition is connected to the air conditioner. Specifically, an air guide member 4 is provided between the air conditioner and the partition. The air guide member 4 is provided with an air duct inlet 41 connected to the air outlet of the air conditioner and an air duct outlet 42 connected to the partition. The air conditioner's cold air can pass through between the partitions, thereby forming a heat exchange air channel between the partitions. In order to evenly blow the cold air from the air conditioner onto the battery module 2, a heat exchange outlet area is also provided on the air guide plate 33, which is arranged toward the battery module 2. Air flow nozzles 34 are provided in the heat exchange outlet area. The air duct outlet 42 of the air guide member 4 is plugged into the partition. Specifically, the air duct outlet 42 of the air guide member 4 is plugged into the two air guide plates 33 and is respectively bonded and fixed to the two air guide plates 33. Of course, in other embodiments, the air duct outlet of the air guide member can also be welded and fixed to the air guide plate, or, in other embodiments, it is also possible to no longer plug and match, but to set the air duct outlet of the air guide member flush with the plate surface of the air guide plate to achieve docking between the two. Of course, in other embodiments, when the energy storage cabinet is set in remote areas such as Xinjiang, due to the low temperature in the area itself, in order to facilitate the energy storage cabinet to be in the best charging and discharging efficiency, the air conditioner can also be adjusted to the heating mode. At this time, the hot air blown out of the air conditioner is used to keep the battery module warm through the air conditioner so that the battery module is at the best working temperature.

[0054] like Figure 5As shown, there are three partitions, two of which are located on the outermost sides of the cabinet 1 and also constitute the left and right walls of the cabinet 1. One of the three partitions is also located between the left and right walls. The three partitions are parallel to each other and spaced apart. The cold air from the air conditioner needs to be prevented from leaking out, so the left and right walls of the cabinet 1 cannot be connected to the outside. Specifically, of the air guide plates 33 on the two outermost partitions of the cabinet 1, only the inner air guide plate 33 is provided with air flow nozzles 34. The air guide plate 33 on the outer side of the two partitions is a bare plate. These two partitions are denoted as single-sided air outlet partitions 31, and the remaining partition is denoted as double-sided air outlet partition 32. The single-sided air outlet partition 31 on the left side of the cabinet and the double-sided air outlet partition 32 in the middle jointly dissipate heat and cool one group of battery modules 2, while the single-sided air outlet partition 31 on the right side of the cabinet and the double-sided air outlet partition 32 in the middle jointly dissipate heat and cool another group of battery modules 2. Of course, in other embodiments, if the number of battery modules is greater, four baffles may be provided, with two single-sided air outlet baffles located on the outermost sides and the remaining two double-sided air outlet baffles located in the middle. Of course, in other embodiments, the baffles may be arranged in other numbers, provided that there are two single-sided air outlet baffles located on the outermost sides and the remaining double-sided air outlet baffles located between the two single-sided air outlet baffles. Alternatively, in other embodiments, when the number of battery modules is smaller, only two single-sided air outlet baffles may be provided.

[0055] There are multiple heat exchange outlet areas, each corresponding to a battery module 2. Since the battery module 2 is placed on the longitudinal beam 12, the position of the longitudinal beam 12 is the edge of the battery module 2, and the L-shaped plate of the longitudinal beam 12 will also form a block on the air guide 33. The heat exchange outlet area needs to avoid the longitudinal beam 12. The heat exchange outlet areas are arranged at intervals so that the longitudinal beam 12 is located between two adjacent heat exchange outlet areas. This can avoid the longitudinal beam 12 and prevent the longitudinal beam 12 from affecting the air outlet of the heat exchange outlet area. At the same time, the central area of ​​the battery module 2 can also be cooled, resulting in higher cooling efficiency. Of course, in other embodiments, air flow nozzles can also be evenly arranged on the air guide, and the air flow nozzles can be divided into different heat exchange outlet areas by the longitudinal beam.

[0056] like Figure 10 and Figure 11As shown, the battery module 2 within the energy storage cabinet is provided with two rows of battery cells 21. A gap is provided between the two rows of battery cells 21 to form an intermediate air duct 25 between the two rows of battery cells 21. A heat sink 22 is provided between each row of battery cells 21. The heat sink 22 has a horizontally extending air duct that allows air to pass through the heat sink 22 to remove heat. The provision of the heat sink 22 increases the heat dissipation area, facilitating faster heat dissipation from the battery module 2. The battery cells 21 and the heat sink 22 constitute a battery core. In addition, to facilitate the placement of the battery module, a tray 26 is provided at the bottom of the battery core. The bottom surface of the tray 26 is intended to be placed on the longitudinal beam 12. The tray 26 and the longitudinal beam 12 overlap and seal with each other, thereby separating the space within the cabinet between the tray 26 and the longitudinal beam 12. The flat surface at the bottom of the tray 26 also constitutes a first sealing surface for mating with the longitudinal beam. When placed, the tray 26 and the support plate where the battery modules are located above the tray 26 constitute a separate heat dissipation space, which facilitates the separate heat dissipation of the space where each battery module 2 is located, and facilitates uniform heat dissipation. After placement, there is no longer a tray 26 above the topmost battery module. In order to achieve the closure of the topmost battery module, a top plate 14 is also provided above the topmost battery module of the cabinet. The top plate 14 cooperates with one of the support plates to form a separate heat dissipation space. The tray 26 has a battery cell 21 located on the outside of the battery cell with a flange. The flange is separated from the cabinet to facilitate gas entry, while also preventing the battery cell 21 from directly contacting the cabinet. Of course, in other embodiments, the tray can also be provided with no flange, and a gap is maintained between the battery module and the partition of the cabinet during use.

[0057] The heat sink 22 comprises two spaced-apart heat sink sub-plates and an obliquely arranged ribbed plate sandwiched between the sub-plates. This facilitates the secure connection of the battery modules 2 while also allowing cool air to pass through. The inlet of the heat sink 22 also serves as a heat exchange air intake. The battery cells 21 are exposed, allowing them to come into contact with cool air. In addition to removing heat through the heat sink 22, cool air can also pass between the two battery modules 2, exchanging heat with the battery cells 21 and removing some heat. This means that the battery modules 2, instead of using a housing, leave the battery cells 21 exposed, improving heat dissipation.

[0058] The battery cells 21 in the energy storage cabinet are connected in series. The performance of the energy storage cabinet depends on the weakest battery cell. Therefore, when dissipating heat from the battery modules 2 within the energy storage cabinet, attention should be paid to uniform heat dissipation, ensuring that the temperatures of each battery module 2 are approximately equal. This requires that the airflow nozzles 34 in the heat exchange outlet area of ​​the air guide plate 33 be arranged in a certain pattern and size. Specifically, the heat exchange outlet area is provided with at least two groups of horizontally spaced airflow nozzles 34. The airflow nozzles 34 in each group are arranged vertically spaced. The airflow nozzles 34 in each heat exchange outlet area are arranged in a matrix. Each airflow nozzle 34 is a circular hole. Due to the small opening of the hole, the process of cold air flowing outward from the partition generates a high pressure, thereby forming a jet, which drives the surrounding air along with it. The airflow nozzles 34 in each group are arranged opposite the heat dissipation plate 22 on the battery module 2, so that the gas flowing out of the partition can quickly flow into the heat dissipation plate of the battery module 2, facilitating heat dissipation of the battery module. At the same time, due to the spacing between the battery module 2 and the partition, even if the air ejection holes 34 do not correspond to the heat sink 22 due to processing technology or manufacturing accuracy, hot air can still enter and heat can be dissipated from the side of the battery.

[0059] Of course, in other embodiments, a heat sink may not be provided, but multiple battery cells may be arranged at intervals, so that a heat exchange channel for gas to pass through and exchange heat with the battery cells is formed between the multiple battery cells. Of course, in other embodiments, the air flow nozzles may no longer correspond to the heat exchange channels, but may be staggered. Due to the fluidity of the gas, the gas flowing out of the air flow nozzles can be sucked into the interior of the battery module through the heat exchange channel and discharged through the exhaust port of the battery module. Alternatively, in other embodiments, the air flow nozzles can be set to polygons such as triangles, squares or pentagons, and spraying can also be performed. However, due to the large wind resistance in the area, the circle is the best embodiment. Alternatively, in other embodiments, such as Figure 7 As shown, the air flow nozzle 34 can also be set as a vertically arranged long hole, which needs to correspond to the heat exchange air intake on the heat sink. Figure 8 As shown, the air flow nozzles 34 are horizontally arranged long holes. There are multiple air flow nozzles arranged at intervals from top to bottom, and the horizontal extension range corresponds to the length of the battery module in the depth direction.

[0060] In order to achieve the purpose of uniform heat dissipation, the present invention simulates and optimizes the cabinet 1 of the energy storage cabinet to obtain the best heat dissipation structure layout. Figure 12As shown, according to the structural characteristics of the cabinet body 1 of the energy storage cabinet, a heat dissipation duct simulation model of the cabinet body 1 of the energy storage cabinet is established and the heat dissipation duct of the simulation model is grid-divided. Different arrangements and sizes of the air flow nozzles 34 are set for testing. Since a plurality of heat exchange outlet areas are provided on the same air guide plate 33, each heat exchange outlet area is designed as a separate area. Specifically, the air guide plate 33 is divided into 8 areas from top to bottom, and the 8 areas are tested with different hole spacings and apertures, for a total of 6 experimental groups. The different hole spacings and apertures are expressed as the number per unit area. At the same time, considering the distribution of the air guide plate 33 on the single-sided air outlet baffle 31 and the double-sided air outlet baffle 32, two tests are conducted on the single-sided air outlet baffle 31 and the double-sided air outlet baffle 32 respectively. The number distribution and diameter distribution of the holes in the 8 areas in the 6 experimental groups are as shown in the following table:

[0061]

[0062] Figure 13 、 Figure 14 The results of the simulation test are shown. It can be seen from the results in the figure that the heat dissipation capacity of air duct 4 and air duct 5 is relatively uniform, among which air duct 4 is the most uniform. Afterwards, the air outlet resistance of different air ducts is simulated and tested, that is, the pressure difference between the inlet of the air guide 4 and the outlet of the air flow nozzle 34 is tested. Figure 15 As shown, the wind resistance of duct 3, duct 5 and duct 6 is relatively small. In summary, duct 5 balances the wind resistance and wind uniformity, and can produce more uniform wind while minimizing the wind resistance. Therefore, the data of duct 5 is also used as the setting form of the air flow nozzle 34 on the cabinet 1. The air flow field simulation results and air flow streamline distribution of the energy storage cabinet are shown in Figure 2. Figure 16 and Figure 17 Specifically, the air ducts are evenly arranged, and each air flow nozzle 34 is an 8mm circular hole. The air flow nozzles 34 in each heat exchange outlet area are arranged to reduce wind resistance. The spacing between the air flow nozzles 34 in each group is 20mm, and the spacing between two adjacent groups of air flow nozzles 34 is 100mm. Of course, the diameter of the air flow nozzles 34 and the spacing between adjacent air flow nozzles 34 can also be adjusted. For example, the air flow nozzles 34 can be set to 7.5mm or 8.5mm diameter circular holes; the spacing between the air flow nozzles in each group can be adjusted to 18mm or 19mm; and the spacing between two adjacent groups of air flow nozzles can be adjusted to 90mm or 110mm.

[0063] Embodiment of the battery module for the energy storage cabinet in the present utility model: The structure of the battery module for the energy storage cabinet in this embodiment is the same as the structure of the battery module in the embodiment of the energy storage cabinet above, and will not be repeated here.

[0064] An embodiment of the cabinet body of the energy storage cabinet in the present utility model: The structure of the cabinet body of the energy storage cabinet in this embodiment is the same as the structure of the cabinet body in the embodiment of the energy storage cabinet, and will not be repeated here.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. An energy storage cabinet, characterized in that: At least one group of battery module installation spaces arranged in an up-down direction is provided in the frame of the energy storage cabinet. Heat exchange air channels arranged in an up-down direction are provided on the frames on both sides of each group of battery module installation spaces. Air flow nozzles are provided at least in the area of ​​the side facing the battery module on the partition facing the battery module installation space of each heat exchange air channel. A gap is provided between the partition and the side of the corresponding battery module. Each battery module is installed in the corresponding battery module installation space by two longitudinal beams arranged in the depth direction on the frame. Each battery module has a battery cell and a tray for holding the battery cell. The tray is installed on the corresponding longitudinal beam. A heat exchange air intake port is provided on the side between the battery cells in front and behind the battery module. An air path is provided inside the battery module, and an exhaust fan connected to the air path is provided at the front end of the battery module.

2. The energy storage cabinet according to claim 1, characterized in that: The air flow nozzles are arranged in groups, and multiple groups of air flow nozzles are arranged horizontally at intervals. The air flow nozzles in each group are circular holes or polygonal holes arranged vertically at intervals so as to correspond to the heat exchange air intake inlets in the battery modules when in use.

3. The energy storage cabinet according to claim 1, characterized in that: The air flow nozzles are vertically arranged long holes, and multiple air flow nozzles are arranged horizontally at intervals so as to correspond to the heat exchange air intake ports in the battery modules respectively when in use.

4. The energy storage cabinet according to claim 1, characterized in that: The air flow nozzles are long holes corresponding to the depth direction of the battery module and extending horizontally, and multiple air flow nozzles are arranged vertically at intervals.

5. The energy storage cabinet according to any one of claims 1 to 4, characterized in that: The tray is in sliding or rolling engagement with the longitudinal beams, and the bottom surface and / or side surfaces of the tray are used for sealing contact engagement with the longitudinal beams.

6. The energy storage cabinet according to claim 5, characterized in that: The longitudinal beam includes a horizontally arranged supporting plate and a vertically arranged limiting plate, and the tray includes a vertically arranged flange located outside the battery cell.

7. The energy storage cabinet according to any one of claims 1 to 4, characterized in that: The battery module includes a panel located at the front end of the battery module, an exhaust port corresponding to the exhaust fan is provided in the middle of the panel, and an annular sealing area for sealing with the frame is provided on the rear side of the panel.

8. The energy storage cabinet according to any one of claims 1 to 4, characterized in that: A heat sink is provided between the battery cells of the battery module. A horizontally extending air duct is provided on the heat sink. The air duct inlet on the heat sink constitutes the heat exchange air intake.

9. The energy storage cabinet according to any one of claims 1 to 4, characterized in that: A top plate is further provided above the topmost battery module of a group of battery modules on the frame, and two sides of the top plate are respectively fitted and fixed to the partitions.

10. A battery module for an energy storage cabinet, characterized in that: It includes a battery cell and a tray arranged at the bottom of the battery cell to support the battery cell. The tray has a supporting portion for supporting on the longitudinal beam of the energy storage cabinet. Adjacent battery cells are arranged at intervals to form a heat exchange air intake for heat exchange air to pass through the battery cells. An exhaust fan is provided at the front end of the battery module to form an air path inside the battery module with air inlet at the side and air outlet at the front end.

11. The battery module for an energy storage cabinet according to claim 10, characterized in that: The battery module includes a panel located at the front end of the battery module, an exhaust port corresponding to the exhaust fan is provided in the middle of the panel, and an annular sealing belt for sealing with the frame is provided on the rear side of the panel.

12. The battery module for an energy storage cabinet according to claim 10 or 11, characterized in that: A heat sink is provided between the battery cells of the battery module. A horizontally extending air duct is provided on the heat sink. The air duct inlet on the heat sink constitutes the heat exchange air intake.

13. An energy storage cabinet body, comprising a frame, wherein the frame is provided with at least one set of battery module installation spaces arranged in an up-and-down direction, characterized in that: Heat exchange air channels arranged in the up-down direction are provided on the frames on both sides of each group of battery module installation space. Air flow nozzles are arranged on the partitions of each heat exchange air channel facing the battery module installation space at least in the area on the side facing the battery module. The partitions are used to cooperate with the side gaps of the battery modules. Longitudinal beams arranged in the depth direction are provided on the frame. The longitudinal beams are arranged in groups of two in the same height direction to support the corresponding battery modules.

14. The energy storage cabinet according to claim 13, characterized in that: The air flow nozzles are arranged in groups, and multiple groups of air flow nozzles are arranged horizontally at intervals. The air flow nozzles in each group are circular holes or polygonal holes arranged vertically at intervals so as to correspond to the heat exchange air intake inlets in the battery modules when in use.

15. The energy storage cabinet according to claim 13, characterized in that: The air flow nozzles are vertically arranged long holes, and multiple air flow nozzles are arranged horizontally at intervals so as to correspond to the heat exchange air intake ports in the battery modules respectively when in use.

16. The energy storage cabinet body according to claim 13, characterized in that: The air flow nozzles are long holes corresponding to the depth direction of the battery module and extending horizontally, and multiple air flow nozzles are arranged vertically at intervals.

17. The energy storage cabinet according to any one of claims 13 to 16, characterized in that: A top plate is further provided above the topmost battery module of a group of battery modules on the frame, and two sides of the top plate are respectively fitted and fixed to the partitions.

Images