Air-cooled battery cabinet system

Abstract

The present application relates to the technical field of battery heat dissipation, and relates to an air-cooled battery cabinet system. The system comprises a cabinet body, wherein battery packs are provided in the cabinet body. The system further comprises a cooling apparatus and air delivery devices, wherein the cooling apparatus is used for delivering a refrigerant into the cabinet body, and the air delivery devices are arranged at the positions of the cabinet close to the battery packs, so as to deliver the refrigerant to the battery packs, such that the refrigerant is in contact with the battery packs. The present application can achieve efficient heat dissipation for battery packs inside a battery cabinet.

Description

A type of air-cooled battery cabinet system Technical Field

[0001] This application relates to the field of battery heat dissipation technology, and in particular to an air-cooled battery cabinet system. Background Technology

[0002] The battery cabinet consists of a cabinet, a battery pack, and a BDU (Battery Management Unit). The BDU is a battery management system that is electrically connected to the battery pack. The battery pack is installed inside the cabinet and is used to connect external loads to achieve the function of powering the loads.

[0003] Battery packs generate heat during long-term operation, and their centralized placement within a relatively enclosed cabinet hinders efficient heat dissipation. This heat accumulation around the battery pack, especially at excessively high temperatures, can lead to malfunctions, shortened lifespan, or even fires. Therefore, a system structure capable of effectively cooling the battery packs within the energy storage cabinet is urgently needed to ensure they operate in a suitable temperature environment, thereby maximizing battery performance and extending battery life. Summary of the Invention

[0004] In order to achieve effective heat dissipation of the battery pack inside the energy storage cabinet and ensure that the battery pack operates in a suitable temperature environment, this application provides an air-cooled battery cabinet system.

[0005] This application provides an air-cooled battery cabinet system including a cabinet, in which a battery pack is disposed, and also includes a cooling device and a gas supply device. The cooling device is used to supply refrigerant into the cabinet, and the gas supply device is disposed in the cabinet near the battery pack to deliver the refrigerant to the battery pack so that the refrigerant comes into contact with the battery pack.

[0006] By adopting the above technical solution, refrigerant is supplied through a cooling device and transported through a gas transmission device, so that the refrigerant enters the cabinet and comes into contact with the battery pack, thereby realizing heat exchange between the refrigerant and the battery pack. Heat exchange is used to dissipate heat from the battery pack, so that the battery pack operates in a suitable temperature environment and ensures that the battery pack can effectively perform its functions.

[0007] Preferably, the refrigerant is cold air. The top of the cabinet is provided with an air inlet chamber, and the bottom of the cabinet is divided into an air supply chamber and an exhaust chamber by the battery pack. The air supply chamber is located around the battery pack, and the exhaust chamber is located between the battery packs. Ventilation holes are provided between adjacent battery packs arranged along the length of the air supply chamber and the exhaust chamber. The air supply chamber and the exhaust chamber are connected through the ventilation holes. The air inlet chamber is connected to the air supply chamber. The air supply device is used to supply cold air into the air inlet chamber, and the air supply device is used to pump the air in the air supply chamber to the outside of the cabinet.

[0008] By adopting the above technical solution, since the air inlet chamber and the air delivery chamber are connected, and the exhaust chamber is connected to the air delivery chamber through the vent, the cooling device delivers cold air into the air inlet chamber, while the air delivery device draws gas into the exhaust chamber. It is easy to see that the flow path of the cold air is as follows: it enters the air inlet chamber at the top of the cabinet, and under the action of its own density, the pressure of the air in the air inlet chamber, and the extraction force of the air delivery device, it flows into the air delivery chamber, and enters the exhaust chamber through the vent. Finally, it is drawn out by the air delivery device and discharged from the cabinet. The cold air will come into contact with the battery pack during the process of passing through the vent and entering the air delivery chamber and the exhaust chamber, so as to achieve heat exchange with the battery pack.

[0009] Preferably, the size of the air supply chamber gradually decreases from top to bottom along the height of the cabinet.

[0010] By adopting the above technical solution, the air delivery chamber space is gradually reduced from top to bottom along the height direction, which promotes the flow of cold air from the large air delivery chamber to the small air delivery chamber. The increased flow rate and pressure are beneficial to the uniformity of cold air pressure around the battery pack at different heights, thereby ensuring that the battery pack at different heights has the same heat dissipation effect.

[0011] Preferably, the air intake chamber is further provided with several flow dividers, each flow divider including two symmetrically arranged flow divider branches. A flow divider channel for cold air to pass through is formed between two adjacent flow divider branches belonging to different flow dividers, and the flow divider channel is connected to the air supply chamber. The air-cooled battery cabinet system also includes a flow divider component, which is used to drive each flow divider to move so that two flow divider branches belonging to the same flow divider move towards each other or away from each other.

[0012] By adopting the above technical solution, the flow channel formed by the flow divider can divert the cold air entering the intake chamber, so that the cold air can flow more evenly into the air delivery chamber. In addition, the flow divider can drive the two flow divider branches of each corresponding flow divider to move, thereby adjusting the position of the flow divider channel, so as to further expand the flow range of cold air during the movement of the flow divider branches and improve the uniformity of cold air delivery.

[0013] Preferably, two adjacent splitter plates belonging to different splitter plates are connected by a connecting rod; the two splitter plates included in the splitter plate closest to the center of symmetry are respectively provided with active rotating shafts, which are rotatably connected to the intake chamber; the splitter component includes a push plate, a sliding component and a return torsion spring, which is sleeved on the active rotating shaft and connected between the splitter plate and the inner wall of the intake chamber;

[0014] The two branch plates of the branch plate closest to the center of symmetry have a pre-reserved insertion gap for the push plate to be inserted. The side walls of the two branch plates of the branch plate closest to the center of symmetry are provided with mating arc surfaces. The push plate is inserted into the insertion gap and contacts the mating arc surfaces. The sliding component is connected to the push plate so that the push plate moves toward or away from the active rotating shaft. When the push plate moves away from the active rotating shaft, the reset torsion spring is used to drive the branch plates to move toward each other.

[0015] By adopting the above technical solution, the sliding component drives the push plate to be inserted into the insertion gap and move towards the direction of the active rotating shaft. This allows the diversion branch plate to move away from the insertion gap under the pushing action of the push plate, the yielding action of the mating arc surface, and the rotational yielding action of the active rotating shaft. When the push plate moves away from the active rotating shaft, the diversion branch plate will move towards the insertion gap under the elastic force of the reset torsion spring, thus achieving reset.

[0016] Preferably, each of the connecting rods is rotatably connected to a drainage blade.

[0017] By adopting the above technical solution, the rotation setting of the diversion blades can divert cold air in the diversion channel and accelerate the flow of cold air.

[0018] Preferably, the air-cooled battery cabinet system further includes a docking arc plate, a docking rod, and a gear; the docking rod, gear, and connecting rod are arranged in a one-to-one correspondence, the docking arc plate is arranged in a one-to-one correspondence with the active rotating shaft, and the docking arc plate is an arc-shaped plate with the active rotating shaft as the center; the docking arc plate is disposed in the air intake cavity; the gears corresponding to all the different diversion plates and located on the same side of the insertion gap are all meshed with the corresponding docking arc plate, the guide vanes are connected to the corresponding docking rods, the docking rods are rotatably connected to the connecting rods, and the gears are connected to the corresponding connecting rods.

[0019] By adopting the above technical solution, when the diversion support plate rotates around the corresponding active rotating shaft, its corresponding gear rotates due to the meshing action of the docking arc plate during the rotation of the diversion support plate, thereby causing the docking rod and the guide vane to rotate.

[0020] Preferably, an air supply plate is inserted between two adjacent battery packs arranged along the length of the exhaust chamber and the air supply chamber. The air supply plate is in contact with the surface of the battery pack, and the vent is opened on the air supply plate. A baffle is provided at one end of the air supply plate near the exhaust chamber. The air-cooled battery cabinet system also includes an opening and closing component, which is used to drive the baffle to move so that the baffle opens and closes the communication position between the vent and the exhaust chamber during the movement.

[0021] By adopting the above technical solution, the connection between the vent and the exhaust chamber is closed by the baffle, that is, the vent and the exhaust chamber are not connected to each other. In this way, the residence time of cold air in the air supply plate is extended, thereby extending the heat exchange time between the cold air and the battery pack through the air supply plate. On the other hand, this method can also guide the cold air to flow downward along the height of the cabinet to the lower air supply chamber, further improving the uniformity of cold air circulation.

[0022] Preferably, the opening and closing component includes a driven shaft disposed in the exhaust chamber at each height, a docking ring sleeved on each driven shaft, and a docking plate disposed corresponding to each docking ring; the ends of the driven shafts at different heights are interconnected, and the driven shaft at the top is drivenly connected to the end of the driving shaft; all baffles in the exhaust chamber at each height and on the same side are connected to the same docking plate; the docking plate is slidably connected to the corresponding exhaust chamber; the side wall of the docking ring is provided with toothed blocks; and the side wall of the docking plate is provided with toothed grooves for meshing with the toothed blocks of the docking plate.

[0023] By adopting the above technical solution, the driven shaft rotates with the rotation of the driving shaft. During the rotation, the docking ring and the docking plate mesh with each other, causing the docking plate to slide. This causes the baffle to slide relative to the corresponding air supply plate and close the vent hole. When the driving shaft reverses and resets under the action of the reset torsion spring, the docking ring reverses and drives the docking plate to slide and reset in the opposite direction. This allows the docking plate to drive the baffle to move and open the vent hole under the action of the reset spring.

[0024] Preferably, the opening and closing component is used to sequentially open and close the communication positions between the vent hole and the exhaust chamber at each height along the height direction of the air supply chamber.

[0025] By adopting the above technical solution, the opening and closing sequence of the airflow is limited, and the cold air is further guided to flow downward along the height of the cabinet into the lower air supply chamber, thereby further optimizing the uniformity of cold air flow.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Cold air is supplied through a cooling device and transported through an air conveying device. The cold air enters the air intake chamber at the top of the cabinet, then flows to the air conveying chamber, and then enters the exhaust chamber through the vent. Finally, the air is guided to the exhaust chamber and the outside of the cabinet through the air conveying device. The cold air then enters the vent again, thus forming an internal and external dual circulation to achieve efficient heat dissipation of the battery pack, ensuring that the battery pack operates in a suitable temperature environment and effectively performs its functions.

[0028] 2. By limiting the size of the air delivery chamber to gradually decrease from top to bottom along the height direction, cold air is forced to flow from the large air delivery chamber to the small air delivery chamber. This ensures that the cold air pressure around the battery pack at different heights is the same, thereby ensuring that the battery pack at different heights has the same heat dissipation effect. Attached Figure Description

[0029] Figure 1 is a structural schematic diagram of an air-cooled battery cabinet system disclosed in Embodiment 1 of this application.

[0030] Figure 2 is a cross-sectional view along direction AA in Figure 1.

[0031] Figure 3 is a cross-sectional view along the BB direction in Figure 1.

[0032] Figure 4 is a cross-sectional view along the CC direction in Figure 1.

[0033] Figure 5 is a schematic diagram illustrating the gas delivery plate structure in Embodiment 1 of this application.

[0034] Figure 6 is a top view of the air intake cavity structure of the air-cooled battery cabinet system in Embodiment 2 of this application.

[0035] Figure 7 is a cross-sectional view of Embodiment 2 of this application, which illustrates the connection relationship between the guide vane and the air intake chamber.

[0036] Figure 8 is a cross-sectional view in an embodiment of this application used to illustrate the connection relationship between the driving shaft and the driven shaft.

[0037] Figure 9 is a cross-sectional view of Embodiment 2 of this application, illustrating the internal structure of the exhaust chamber.

[0038] Figure 10 is a schematic diagram showing the positional relationship between the docking ring tooth block and the docking plate at different heights in the cabinet height direction, in other embodiments disclosed in this application that differ from Embodiments 1 and 2.

[0039] Explanation of reference numerals in the attached drawings: 1. Cabinet; 11. Frame; 12. Air inlet chamber; 13. Air delivery chamber; 14. Exhaust chamber; 2. Battery pack; 21. Battery cell; 22. Air delivery plate; 221. Vent hole; 3. BDU; 4. Cooling device; 41. Air inlet; 42. Air outlet; 5. Air delivery equipment; 6. Diverter plate; 61. Diverter support plate; 611. Connecting arc surface; 62. Diverter channel; 63. Connecting rod; 64. Active rotating shaft; 65. Insertion gap; 7. Diverter component; 71. Push plate; 72. Sliding component; 73. Return torsion spring; 74. Connecting rod; 75. Gear; 76. Connecting arc plate; 77. Drain vane; 8. Baffle; 9. Opening and closing component; 91. Driven shaft; 92. Connecting ring; 921. Tooth block; 93. Connecting plate. Detailed Implementation

[0040] The present application will be further described in detail below with reference to Figures 1-10.

[0041] Example 1

[0042] Embodiment 1 of this application discloses an air-cooled battery cabinet system. Referring to Figures 1, 2 and 3, the air-cooled battery cabinet system includes a cabinet 1, and a rack 11 is provided inside the cabinet 1. The rack 11 is arranged along the height direction of the cabinet 1, and the rack 11 has several layers of storage space for placing battery packs 2 along its height direction. Each storage space places two sets of battery packs 2 along the width direction of the cabinet 1. The rack 11 below the bottom battery pack 2 is equipped with a BDU3 that is electrically connected to the battery pack 2.

[0043] Referring to Figures 3, 4, and 5, the internal space of the cabinet 1 is divided into an air intake chamber 12, an air supply chamber 13, and an exhaust chamber 14 by the battery pack 2. The air intake chamber 12 is located at the top of the battery pack 2, the air supply chambers 13 are located on both sides of the battery pack 2, and the exhaust chamber 14 is located between two battery packs 2 on each layer. Each battery pack 2 includes several battery cells 21, and an air supply plate 22 is inserted between adjacent battery cells 21, contacting the surface of the battery cells 21. The structure of the air supply plate 22 is shown in Figure 5. The side wall of the air supply plate 22 has ventilation holes 221, and the exhaust chamber 14 is connected to the air supply chamber 13 through the ventilation holes 221. The air supply chamber 13 is connected to the air intake chamber 12.

[0044] Referring to Figures 1, 2, and 3, the cabinet 1 is also equipped with a cooling device 4 and an air supply device 5. The cooling device 4 is used to supply refrigerant into the cabinet 1, and the air supply device 5 is used to transport refrigerant within the cabinet 1. Specifically, the refrigerant disclosed in this embodiment is cold air, the cooling device 4 is an industrial air conditioner, and the air supply device 5 is a fan. The air inlet 41 of the cooling device 4 is connected to the interior of the cabinet 1 and faces the battery pack 2, while the air outlet 42 of the cooling device 4 faces the air inlet cavity 12, so as to draw in hot air from the cabinet 1, cool it, and then output cold air into the air inlet cavity 12. To improve sealing, a sealing layer is provided on the inner wall of the cabinet door near the air inlet cavity. In this embodiment, the sealing layer can be made of EPDM rubber. The air supply cavity 13 is located below the air inlet cavity 12 and on both sides of the air inlet cavity 12. The space size of the air supply cavity 13 on both sides of each battery pack 2 is different, and the space of the air supply cavity 13 gradually decreases along the height direction of the cabinet 1. Each exhaust chamber 14 corresponds to an air supply device 5, which is used to guide the air in the corresponding exhaust chamber 14 to the air inlet of the cooling device 4.

[0045] The implementation principle of the air-cooled battery cabinet system in this embodiment is as follows: The dashed arrow in the figure represents the airflow path. Air is drawn from the battery pack 2 near the cabinet door by the cooling device 4 and cooled to form cold air. The cold air is then delivered from the air outlet of the cooling device 4 to the air inlet 12 located at the top of the cabinet 1. The cold air in the air inlet 12 flows to the air delivery cavities 13 on both sides under the action of airflow pressure and its own density. Since the space of the air delivery cavities 13 gradually decreases along the height direction, this structure helps the cold air in the large space of the air delivery cavities 13 to flow to the small space of the air delivery cavities 13, so that each layer of air delivery cavities 1... The cold air in the cabinet 1 and the cold air entering each exhaust chamber 14 are of uniform volume; the cold air enters the exhaust chamber 14 through the air conveying plate 22. During this process, the cold air can exchange heat with the battery cell 21 through the air conveying plate 22 and the cold air flowing through it, and take away the heat generated by the battery cell 21; finally, the air in the exhaust chamber 14 is guided out of the exhaust chamber 14 by the air conveying device 5 and flows into the space reserved between the cabinet door and the frame 11, and then is drawn into the cooling device 4 through the air inlet 41 of the cooling device 4 for cooling, thereby forming an internal and external air cooling cycle in the cabinet 1 and improving the cooling effect on the battery pack 2.

[0046] In addition, the top of the cabinet 1 in this application is also provided with a fire-fighting component. For example, the fire-fighting component can be a combination of a temperature sensor, an audible and visual alarm, and a controller. The temperature sensor and the audible and visual alarm are electrically connected to the controller. The temperature sensor detects the temperature data inside the cabinet 1, and the controller controls the opening and closing of the audible and visual alarm based on the temperature data so that the audible and visual alarm is activated when the temperature is too high.

[0047] Example 2

[0048] The difference between Embodiment 2 and Embodiment 1 is as follows: Referring to Figures 6 and 7, the air intake chamber 12 is provided with a plurality of flow dividers 6. Each flow divider 6 includes two flow divider branches 61 symmetrically arranged with the center of the air intake chamber 12 as the center of symmetry. Among all the flow divider branches 61 belonging to different flow dividers 6 and located on the same side of the center of symmetry, a flow divider channel 62 for cold air to pass through is formed between two adjacent flow divider branches 61. A connecting rod 63 is provided in the flow divider channel 62, and the connecting rod 63 is used to connect two adjacent flow divider branches 61.

[0049] Referring to Figures 6 and 7, the system also includes a flow divider 7, which drives each set of flow dividers 6 to move, so that the two flow divider branches 61 belonging to the same flow divider 6 move towards or away from each other. Specifically, the ends of the two flow divider branches 61 included in the set of flow dividers 6 closest to the center of symmetry are respectively connected to an active rotating shaft 64, which is rotatably connected to the intake chamber 12. The flow divider 7 includes a pusher plate 71, a sliding component 72, and a return torsion spring 73. The return torsion spring 73 is arranged in a one-to-one correspondence with the active rotating shaft, and is sleeved on the corresponding active rotating shaft and connected to the inner wall of the intake chamber 12 and the side wall of the corresponding flow divider branch 61.

[0050] Referring to Figures 6 and 7, each diversion branch plate 61 is arc-shaped. The two diversion branch plates 61 included in the diversion branch plate 6 closest to the center of symmetry have mating arc surfaces 611 on their side walls, and there is an insertion gap 65 between the two diversion branch plates 61 included in the diversion branch plate 6 closest to the center of symmetry. The push plate 71 is inserted into the insertion gap 65 and contacts the mating arc surface 611. It can slide towards or away from the active rotating shaft 64 by means of the sliding component 72. The sliding component 72 can be a cylinder connected to the end of the push plate 71. The sliding component 72 drives the push plate 71 to move towards the active rotating shaft 64, so that the insertion gap 65 is widened by the push of the push plate 71, thereby causing the two branch plates 61 contained in each branch plate 6 to move away from each other. At this time, the reset torsion spring 73 deforms. When the push plate 71 moves away from the active rotating shaft 64, the push plate 71 releases the push on the branch plates 61, so that all branch plates 61 move and reset towards the insertion gap 65 together under the elastic force of the reset torsion spring 73 and the connecting action of the connecting rod 63.

[0051] Referring to Figures 6 and 7, each connecting rod 63 is also rotatably connected to a docking rod 74. The movement paths formed by the docking rods 74 corresponding to all different flow dividers 61 located on the same side of the center of symmetry, moving around the active rotating shaft, coincide with each other. The docking rods 74 are equipped with guide vanes 77, and each docking rod 74 is also fitted with a gear 75. The gears 75 corresponding to all different flow dividers 61 located on the same side of the center of symmetry mesh together with a docking arc plate 76. The docking arc plate 76 is arc-shaped and centered on the movement path of the connecting rod 63 (this center is the position of the corresponding active rotating shaft 64). The docking arc plate 76 is embedded in the bottom wall of the air intake chamber 12, so that when the connecting rod 63 moves with the flow divider 61, the meshing action of the gear 75 and the docking arc plate 76 causes the connecting rod 63 to rotate, thereby causing the guide vanes 77 to rotate and increasing the flow speed of the cold air in the flow divider channel 62.

[0052] Referring to Figures 8 and 9, the system also includes an opening / closing member 9 and a baffle 8. Each air supply plate 22 has a baffle 8 at one end located in the exhaust chamber 14. The opening / closing member 9 is used to drive the baffle 8 to slide so that the baffle 8 opens and closes the position where the vent 221 is connected to the exhaust chamber 14 during the sliding process.

[0053] Referring to Figures 8 and 9, specifically, the opening / closing component 9 includes a driven shaft 91, a docking ring 92, and a docking plate 93. The baffles 8 at the ends of the gas delivery plates 22 between the cells 21 in each battery pack 2 are connected to the same docking plate 93. The docking plate 93 slides along the length of the exhaust chamber 14 and is connected to the inner wall of the exhaust chamber 14. Each docking plate 93 in each exhaust chamber 14 corresponds to a driven shaft 91. The driven shaft 91 is rotatably connected to the corresponding exhaust chamber 14, and the driven shafts 91 in adjacent exhaust chambers 14 are coaxially arranged and connected at their ends. The driven shaft 91 in the topmost exhaust chamber 14 is connected to the driving shaft 64 via a gear set, so that when the driving shaft 64 rotates, all driven shafts 91 rotate accordingly, and the rotation direction of the driven shaft 91 is the same as the rotation direction of the driving shaft 64 connected to it.

[0054] Referring to Figures 8 and 9, each driven shaft 91 corresponds to a mating ring 92. The mating ring 92 is fixedly sleeved on the outside of the corresponding driven shaft 91. The peripheral wall of the mating ring 92 is provided with toothed blocks 921. The side wall of the mating plate 93 near the driven shaft 91 is provided with toothed grooves for meshing with the toothed blocks 921 on the surface of the mating ring 92.

[0055] In other embodiments, referring to FIG10, when the reset torsion spring 73 on the active rotating shaft 64 is not deformed, that is, when the active rotating shaft 64 is not rotating, the toothed blocks 921 on the mating rings 92 on the driven shafts 91 in different exhaust chambers 14 are positioned differently relative to the mating plates 93. This allows the mating rings 92 in exhaust chambers 14 at different heights to rotate sequentially to the position of engaging with the corresponding mating plates 93 in the order from top to bottom along the height direction of the cabinet 1, that is, the baffles 8 in exhaust chambers 14 at corresponding heights to sequentially close the corresponding vent holes 221 in the order from top to bottom along the height direction of the cabinet 1. When the active rotating shaft 64 reverses and resets under the action of the reset torsion spring 73, the meshing action of the toothed blocks 921 on the mating rings 92 and the mating plates 93 causes the baffles 8 at different heights to sequentially open the corresponding vent holes 221 in the order from bottom to top.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wind-cooled battery cabinet system, comprising a cabinet (1), wherein a battery pack (2) is disposed within the cabinet (1), characterized in that: It also includes a cooling device (4) and a gas supply device (5). The cooling device (4) is used to supply refrigerant into the cabinet (1). The gas supply device (5) is located in the cabinet near the battery pack (2) to deliver refrigerant to the battery pack (2) so that the refrigerant comes into contact with the battery pack (2). The refrigerant is cold air. The top of the cabinet (1) is provided with an air inlet chamber (12). The bottom of the cabinet (1) is divided into an air supply chamber (13) and an exhaust chamber (14) by the battery pack (2). A vent hole (221) is provided between adjacent battery packs (2) arranged along the length direction of the air supply chamber (13) and the exhaust chamber (14). The air supply chamber (13) and the exhaust chamber (14) are connected through the vent hole (221). The air inlet chamber (12) is connected to the air supply chamber (13). The air intake chamber (12) is also provided with several flow dividers (6), each flow divider (6) including two symmetrically arranged flow divider branches (61). A flow divider channel (62) for cold air to pass through is formed between two adjacent flow divider branches (61) belonging to different flow dividers (6), and the flow divider channel (62) is connected to the air delivery chamber (13). The air-cooled battery cabinet system also includes a flow divider component (7), which is used to drive each flow divider (6) to move so that two flow divider branches (61) belonging to the same flow divider (6) move towards each other or away from each other. The flow divider (6) is connected by a connecting rod (63) between two adjacent flow divider branches (61) belonging to different flow dividers (6); the two flow divider branches (61) included in the flow divider group closest to the center of symmetry are respectively provided with active rotating shafts (64), and the active rotating shafts (64) are rotatably connected to the air intake chamber (12); the flow divider (7) includes a push plate (71), a sliding component (72) and a return torsion spring (73), and the return torsion spring (73) is sleeved on the active rotating shaft (64) and connected between the flow divider branch (61) and the inner wall of the air intake chamber (12); A pre-reserved insertion gap (65) is provided between the two branch plates (61) of the branch plate (6) closest to the center of symmetry for the insertion of the push plate (71). The side walls of the two branch plates (61) of the branch plate (6) closest to the center of symmetry are provided with mating arc surfaces (611). The push plate (71) is inserted into the insertion gap (65) and contacts the mating arc surface (611). The sliding component (72) is connected to the push plate (71) so that the push plate (71) moves toward or away from the active rotating shaft (64). When the push plate (71) moves away from the active rotating shaft (64), the reset torsion spring (73) is used to drive the branch plates (61) to move toward each other. An air supply plate (22) is inserted between two adjacent battery packs (2) arranged along the length direction of the exhaust chamber (14) and the air supply chamber (13). The air supply plate (22) is in contact with the surface of the battery pack (2). The vent hole (221) is opened on the air supply plate (22). A baffle (8) is provided at one end of the air supply plate (22) near the exhaust chamber (14). The air-cooled battery cabinet system also includes an opening and closing component (9). The opening and closing component (9) is used to drive the baffle (8) to move so that the baffle (8) opens and closes the communication position between the vent hole (221) and the exhaust chamber (14) during the movement. The opening and closing component (9) includes a driven shaft (91) disposed in the exhaust chamber (14) at each height, a docking ring (92) sleeved on each driven shaft (91), and a docking plate (93) disposed in a one-to-one correspondence with the docking ring (92); the ends of the driven shafts (91) at different heights are connected to each other, and the driven shaft (91) at the top is driven to the end of the driving shaft. All baffles (8) in the exhaust chamber (14) at each height and on the same side are connected to the same docking plate (93). The docking plate (93) is slidably connected to the corresponding exhaust chamber (14). The side wall of the docking ring (92) is provided with a toothed block (921), and the side wall of the docking plate (93) is provided with a toothed groove for meshing with the toothed block (921) of the docking plate (93).

2. The air-cooled battery cabinet system according to claim 1, characterized in that: The air supply chamber (13) is located outside the battery pack (2), the exhaust chamber (14) is located between the battery packs (2), the cooling device (4) is used to supply cold air into the air inlet chamber (12), and the air supply device (5) is used to pump the air in the air supply chamber (13) to the outside of the cabinet (1).

3. The air-cooled battery cabinet system according to claim 2, characterized in that: The size of the air supply chamber (13) gradually decreases from top to bottom along the height direction of the cabinet (1).

4. The air-cooled battery cabinet system according to claim 1, characterized in that: Each of the connecting rods (63) is rotatably connected to a drainage blade (77).

5. The air-cooled battery cabinet system according to claim 4, characterized in that: It also includes a docking arc plate (76), a docking rod (74), and a gear (75); the docking rod (74), the gear (75), and the connecting rod (63) are arranged in a one-to-one correspondence; the docking arc plate (76) and the active rotating shaft (64) are arranged in a one-to-one correspondence; and the docking arc plate (76) is an arc-shaped plate with the active rotating shaft (64) as the center; the docking arc plate (76) is set in the air intake chamber (12); the gears (75) corresponding to all the different flow dividers (6) and located on the same side of the insertion gap (65) are meshed with the corresponding docking arc plate (76); the guide vane (77) is connected to the corresponding docking rod (74); the docking rod (74) is rotatably connected to the connecting rod (63); and the gear (75) is connected to the corresponding connecting rod (63).

6. The air-cooled battery cabinet system according to claim 1, characterized in that: The opening and closing component (9) is used to sequentially open and close the communication positions of the vent (221) and the exhaust chamber (14) at each height along the height direction of the air supply chamber (13).

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