An air-cooled battery cabinet system

Abstract

The present application relates to an air-cooled battery cabinet system, and relates to the technical field of battery heat dissipation; it comprises a cabinet body, in which a battery pack is arranged, and also comprises a cooling device and a gas transmission equipment, wherein the cooling device is used to transmit a refrigerant into the cabinet body, and the gas transmission equipment is arranged at a position of the cabinet close to the battery pack, so as to transmit the refrigerant to the battery pack, so that the refrigerant is in contact with the battery pack; the present application can realize efficient heat dissipation of the battery pack in the battery cabinet.

Description

Technical Field

[0001] The present application relates to the technical field of battery heat dissipation, and in particular to an air-cooled battery cabinet system. Background Art

[0002] The battery cabinet consists of a cabinet, a battery pack and a BDU. The BDU is a battery management system and is electrically connected to the battery pack. The battery pack is installed in the cabinet and is used for external loads to realize the function of the load.

[0003] Since the battery pack will generate heat during long-term operation and the battery pack is centrally placed in a relatively closed cabinet, the heat generated by the battery pack cannot be dissipated efficiently. The heat accumulates around the battery pack. When the temperature is too high, it may cause the battery pack to malfunction or shorten its life, or even cause a fire. Therefore, there is an urgent need for a system structure that can effectively dissipate the heat of the battery pack in the energy storage cabinet to ensure that the battery pack works in a suitable temperature environment, thereby effectively exerting the performance of the battery pack and ensuring the battery life. Summary of the invention

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

[0005] The present application provides an air-cooled battery cabinet system, which adopts the following technical solution:

[0006] A wind-cooled battery cabinet system includes a cabinet body, a battery pack is arranged in the cabinet body, and also includes a cooling device and a gas transmission equipment. The cooling device is used to transport refrigerant into the cabinet body, and the gas transmission equipment is arranged at a position of the cabinet close to the battery pack to transport the refrigerant to the battery pack so that the refrigerant is in contact with the battery pack.

[0007] By adopting the above technical solution, refrigerant is supplied through the refrigeration device, and the refrigerant is transmitted through the gas transmission equipment, so that the refrigerant enters the cabinet and contacts the battery pack, thereby realizing heat exchange between the refrigerant and the battery pack. Heat exchange is used to dissipate heat for the battery pack, so that the battery pack works in an environment of suitable temperature, ensuring that the battery pack can effectively exert its performance.

[0008] Preferably, the refrigerant is cold air, an air inlet cavity is provided on the top of the cabinet, and the lower part of the cabinet is divided into an air delivery cavity and an exhaust cavity by the battery pack, the air delivery cavity is located outside the battery pack, and the exhaust cavity is located between the battery packs; air vents are provided between adjacent battery packs arranged along the length direction of the air delivery cavity and the exhaust cavity, and the air delivery cavity and the exhaust cavity are connected through the air vents; the air inlet cavity is connected with the air delivery cavity, the air supply device is used to deliver cold air into the air inlet cavity, and the air delivery equipment is used to pump the air in the air delivery cavity to the outside of the cabinet.

[0009] By adopting the above technical scheme, since the air intake chamber is connected with the air delivery chamber, and the exhaust chamber is connected with the air delivery chamber through the vent, the cooling device delivers cold air to the air intake chamber, and the air delivery equipment pumps gas into the exhaust chamber. It is not difficult to see that the flow path of the cold air is: entering the air intake chamber at the top of the cabinet, under the action of its own density, the pressure of the air in the air intake chamber, and the extraction force of the air delivery equipment, it flows into the air delivery chamber, and enters the exhaust chamber through the vent, and finally is extracted by the air delivery equipment and discharged out of the cabinet. In the process of passing through the vent and entering the air delivery chamber and the exhaust chamber, the cold air will contact with the battery pack to realize heat exchange with the battery pack.

[0010] Preferably, the size of the air delivery cavity gradually decreases from top to bottom along the height direction of the cabinet.

[0011] By adopting the above technical solution, by limiting the space of the air delivery cavity to gradually decrease from top to bottom in the height direction, the flow of cold air from the large air delivery cavity to the small air delivery cavity is accelerated, the flow rate and pressure are increased, which is conducive to the same cold air pressure around battery packs at different heights, thereby ensuring that battery packs at different heights have the same heat dissipation effect.

[0012] Preferably, a plurality of groups of diverter plates are arranged in the air inlet cavity, each group of diverter plates comprises two symmetrically arranged diverter branches, a diverter channel for cold air to pass through is formed between two adjacent diverter branches belonging to different diverter plates, and the diverter channel is connected to the air delivery cavity; a diverter member is also included, and the diverter member is used to drive each group of diverter plates to move so that the two diverter branches belonging to the same diverter plate move toward or away from each other.

[0013] By adopting the above-mentioned technical scheme, the diversion channel formed by the diverter plate can divert the cold air entering the air inlet cavity so that the cold air can flow into the air delivery cavity more evenly. In addition, the diverter can drive the two diverter branches of each same diverter plate to move, thereby adjusting the position of the diverter channel, so as to further expand the diversion and delivery range of the cold air during the movement of the diverter branch plate and improve the uniformity of the cold air delivery.

[0014] Preferably, a connecting rod is commonly connected between two adjacent flow branch plates belonging to different flow branch plates; two flow branch plates included in a group of flow branch plates closest to the symmetry center are respectively provided with active rotating shafts, and the active rotating shafts are rotatably connected to the air inlet cavity; the flow dividing member includes a push plate, a sliding member and a reset torsion spring, and the reset torsion spring is sleeved on the active rotating shaft and connected between the flow branch plate and the inner wall of the air inlet cavity;

[0015] A plug-in gap for inserting a push plate is reserved between the two diversion branches included in a group of diversion plates closest to the symmetry center, and the side walls of the two diversion branches included in the group of diversion plates closest to the symmetry center are provided with a docking arc surface, the push plate is inserted in the plug-in gap and contacts with the docking arc surface, 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 in the direction away from the active rotating shaft, the reset torsion spring is used to drive the diversion branches to move toward each other.

[0016] By adopting the above technical solution, the push plate is driven by the sliding component to be inserted into the plug-in gap and moved in the direction close to the active rotating shaft, so that the diverter branch plate moves in the direction away from the plug-in gap under the pushing action of the push plate, the yielding action of the docking arc surface and the rotation yielding action of the active rotating shaft. When the push plate moves in the direction away from the active rotating shaft, the diverter branch plate will move in the direction close to the plug-in gap under the elastic force of the reset torsion spring to achieve reset.

[0017] Preferably, each of the connecting rods is rotatably connected to a guide vane.

[0018] By adopting the above technical solution, the rotation setting of the guide blade can guide the cold air in the diversion channel and promote the flow of the cold air.

[0019] Preferably, it also includes a docking arc plate, a docking rod, and a gear; the docking rod, the gear and the connecting rod are arranged in a one-to-one correspondence, the docking arc plate and the active rotating shaft are arranged in a one-to-one correspondence, and the docking arc plate is an arc-shaped plate with the active rotating shaft as the center; the docking arc plate is arranged in the air intake cavity; the gears corresponding to all the diversion branch plates belonging to different diversion plates and located on the same side of the plug-in gap are all engaged with the corresponding docking arc plate, the guide blades 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.

[0020] By adopting the above technical solution, when the diverter branch plate rotates around the corresponding active shaft, the corresponding gear rotates with the diverter branch plate under the meshing action of the docking arc plate, thereby causing the docking rod and the guide blade to rotate.

[0021] Preferably, an air delivery plate is inserted between two adjacent battery packs arranged along the length direction of the exhaust cavity and the air delivery cavity, the air delivery plate is in contact with the surface of the battery pack, and the vent is provided on the air delivery plate; a baffle is provided at one end of the air delivery plate close to the exhaust cavity, and also includes an opening and closing member, the opening and closing member is used to drive the baffle to move so that the baffle opens and closes the connecting position between the vent and the exhaust cavity during the movement.

[0022] By adopting the above technical solution, the connecting position between the vent hole and the exhaust cavity is closed by a baffle, that is, the vent hole and the exhaust cavity are not connected to each other, so as to extend the residence time of the cold air in the air supply plate, thereby extending the heat exchange time between the cold air and the battery pack through the air supply plate. On the other hand, in this way, the cold air can also be guided to flow downward along the height direction of the cabinet to the lower air supply cavity, thereby further improving the circulation uniformity of the cold air.

[0023] Preferably, the opening and closing parts include a driven shaft arranged in the exhaust cavity at each height, a docking ring sleeved on each driven shaft, and a docking plate arranged in one-to-one correspondence with the docking ring; the ends of the driven shafts at different heights are connected to each other, and the driven shaft located at the top is transmission-connected to the end of the driving shaft, all baffles in the exhaust cavity 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 cavity, the side wall of the docking ring is provided with a tooth block, and the side wall of the docking plate is provided with a tooth groove for meshing with the tooth block of the docking plate.

[0024] By adopting the above technical solution, the driven shaft rotates with the rotation of the driving shaft, and during the rotation process, the docking ring and the docking plate mesh with each other and cause the docking plate to slide, so that the baffle slides relative to the corresponding air supply plate and closes the vent hole. When the driving shaft is reversed and reset under the drive of the reset torsion spring, the docking ring reverses and drives the docking plate to slide and reset in the opposite direction, so that the docking plate drives the baffle to move and open the vent hole under the action of the reset spring.

[0025] Preferably, the opening and closing member is used to sequentially open and close the communication position between the vent hole and the exhaust cavity at each height along the height direction of the gas delivery cavity.

[0026] By adopting the above technical solution, the opening and closing sequence of the circulation is limited, and the cold air is further guided to flow downward along the height direction of the cabinet to the lower air delivery cavity, thereby further optimizing the circulation uniformity of the cold air.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] The cold air is supplied by the cooling device and transmitted by the air transmission equipment, so that the cold air enters the air intake cavity at the top of the cabinet, then flows to the air transmission cavity, and then enters the exhaust cavity through the vent, and finally flows to the exhaust cavity and outside the cabinet through the air transmission equipment. The cold air passes through the vent to form an internal and external double circulation, thereby achieving efficient heat dissipation of the battery pack, ensuring that the battery pack works in an environment with a suitable temperature, and ensuring that the battery pack effectively exerts its performance;

[0029] By limiting the size of the air delivery cavity to gradually decrease from top to bottom in the height direction, the flow of cold air from the large air delivery cavity to the small air delivery cavity is promoted, which is beneficial to making the cold air pressure around battery packs at different heights the same, thereby ensuring that battery packs at different heights have the same heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an air-cooled battery cabinet system disclosed in Example 1 of the present application.

[0031] Figure 2 yes Figure 1 Sectional view along AA direction.

[0032] Figure 3 yes Figure 1 Cross-sectional view along the BB axis.

[0033] Figure 4 yes Figure 1 Sectional view along CC direction.

[0034] Figure 5 It is a schematic diagram used to illustrate the structure of the gas transmission plate in Example 1 of the present application.

[0035] Figure 6 It is a top view of the structure inside the air intake cavity of the air-cooled battery cabinet system in Example 2 of the present application.

[0036] Figure 7 It is a cross-sectional view used to illustrate the connection relationship between the guide vane and the air inlet cavity in Example 2 of the present application.

[0037] Figure 8 It is a cross-sectional view used to illustrate the connection relationship between the driving shaft and the driven shaft in the embodiment of the present application.

[0038] Fig. 9 It is a cross-sectional view used to reflect the structure inside the exhaust cavity in Example 2 of the present application.

[0039] Fig.10 It is a schematic diagram for reflecting the positional relationship between the docking ring gear block and the docking plate at different heights in the height direction of the cabinet in other embodiments disclosed in the present application that are different from Embodiment 1 and Embodiment 2.

[0040] Explanation of the accompanying drawings: 1. cabinet; 11. rack; 12. air inlet chamber; 13. air delivery chamber; 14. exhaust chamber; 2. battery pack; 21. battery cell; 22. air delivery plate; 221. vent; 3. BDU; 4. cooling device; 42. air inlet; 41. air outlet; 5. gas delivery equipment; 6. diverter plate; 61. diverter branch plate; 611. docking arc surface; 62. diverter channel; 63. connecting rod; 64. driving shaft; 65. plug-in gap; 7. diverter member; 71. push plate; 72. sliding member; 73. reset torsion spring; 74. docking rod; 75. gear; 76. docking arc plate; 77. guide blade; 8. baffle; 9. opening and closing member; 91. driven shaft; 92. docking ring; 921. gear block; 93. docking plate. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-10 This application is described in further detail. Example 1

[0042] Embodiment 1 of the present application discloses an air-cooled battery cabinet system. Figure 1 , Figure 2 and Figure 3 The air-cooled battery cabinet system includes a cabinet 1, in which a rack 11 is arranged. The rack 11 is arranged along the height direction of the cabinet 1, and the rack 11 is provided with several layers of storage space for placing battery packs 2 along its height direction. Two groups of battery packs 2 are placed in each layer of storage space along the width direction of the cabinet 1, and a BDU 3 electrically connected to the battery pack 2 is installed on the rack 11 below the battery pack 2 on the bottom layer.

[0043] Reference Figure 3 , Figure 4 and Figure 5 The internal space of the cabinet 1 is divided into an air intake chamber 12, an air delivery chamber 13 and an air 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 delivery chamber 13 is located at both sides of the battery pack 2, and the air exhaust chamber 14 is located between two groups of battery packs 2 on each layer. Each group of battery packs 2 includes a plurality of battery cells 21, and an air delivery plate 22 is inserted between adjacent battery cells 21. The air delivery plate 22 is in contact with the surface of the battery cell 21. The structure of the air delivery plate 22 is as follows: Figure 5 As shown, a vent hole 221 is opened on the side wall of the air delivery plate 22 , and the exhaust cavity 14 is connected to the air delivery cavity 13 through the vent hole 221 , and the air delivery cavity 13 is connected to the air inlet cavity 12 .

[0044] Reference Figure 1 , Figure 2 and Figure 3, the cabinet 1 is also provided with a cooling device 4 and an air delivery device 5. The cooling device 4 is used to deliver refrigerant to the cabinet 1, and the air delivery device 5 is used to deliver refrigerant in the cabinet 1. Specifically, the refrigerant disclosed in the embodiment of the present application is cold air, the cooling device 4 is an industrial air conditioner, and the air delivery device 5 is a fan. The air inlet 42 of the cooling device 4 is connected to the inside of the cabinet 1 and faces the battery pack 2. The air outlet 41 of the cooling device 4 faces the air inlet cavity 12, so as to extract the hot air in the cabinet 1 and output the cold air to the air inlet cavity 12 after refrigeration. In order to improve the sealing performance, a sealing layer is provided on the inner wall of the cabinet door near the air inlet cavity. The sealing layer in this embodiment can be made of EPDM. The air delivery 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 delivery cavity 13 on both sides of each layer of battery pack 2 is different, and the space of the air delivery cavity 13 gradually decreases along the height direction of the cabinet 1. Each layer of the exhaust cavity 14 corresponds to an air delivery device 5 , and the air delivery device 5 is used to guide the air in the corresponding exhaust cavity 14 to the air inlet 42 of the cooling device 4 .

[0045] The implementation principle of an air-cooled battery cabinet system in the embodiment of the present application is as follows: the dotted arrow in the figure is the flow path of air, and air is extracted from the battery pack 2 on one side near the cabinet door by the cooling device 4, and cooled to form cold air, and then delivered to the air inlet cavity 12 at the top of the cabinet body 1 by the air outlet 41 of the cooling device 4. The cold air in the air inlet cavity 12 flows to the air delivery cavity 13 on both sides under the action of air flow pressure and its own density. Since the space of the air delivery cavity 13 gradually decreases in the height direction, this structure helps the cold air in the large air delivery cavity 13 to flow to the small air delivery cavity 13, so that each layer of the air delivery cavity 13 can be cooled. The amount of cold air in the air cavity 13 and the cold air entering each layer of the exhaust cavity 14 is uniform; and the cold air enters the exhaust cavity 14 through the air delivery plate 22. In this process, the air delivery plate 22 and the cold air flowing through it can be used to achieve heat exchange with the battery cell 21, and take away the heat generated by the battery cell 21; finally, the air in the exhaust cavity 14 is guided by the air delivery device 5 to flow out of the exhaust cavity 14 and flow into the space reserved between the cabinet door and the rack 11, and then sucked into the cooling device 4 through the air inlet 42 of the cooling device 4 for cooling, thereby forming an internal and external air cooling cycle in the cabinet 1, thereby improving the cooling effect on the battery pack 2.

[0046] In addition, a fire-fighting component is also provided on the top of the cabinet 1 of the present application. Exemplarily, the fire-fighting component can be a combination structure 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 data in the cabinet 1 is detected by the temperature sensor. The controller controls the opening and closing of the audible and visual alarm based on the temperature data, so as to turn on the audible and visual alarm when the temperature is too high. Example 2

[0047] The difference between Example 2 of the present application and Example 1 is that: Figure 6 and Figure 7 A plurality of groups of diverter plates 6 are provided in the air inlet cavity 12, and each group of diverter plates 6 includes two diverter branches 61 symmetrically arranged with the center of the air inlet cavity 12 as the symmetry center. Among all the diverter branches 61 belonging to different diverter plates 6 and located on the same side of the symmetry center, a diverter channel 62 for cold air to pass through is formed between two adjacent diverter branches 61, and a connecting rod 63 is provided in the diverter channel 62, and the connecting rod 63 is used to connect two adjacent diverter branches 61.

[0048] Reference Figure 6 and Figure 7 , and also includes a flow divider 7, which is used to drive each group of diverter plates 6 to move so that the two diverter branches 61 belonging to the same diverter plate 6 move toward or away from each other. Specifically, the ends of the two diverter branches 61 included in the group of diverter plates 6 closest to the symmetry center are respectively connected to the active shaft 64, and the active shaft 64 is rotatably connected to the air inlet cavity 12. The flow divider 7 includes a push plate 71, a sliding component 72 and a reset torsion spring 73, and the reset torsion spring 73 is arranged in a one-to-one correspondence with the active shaft. The reset torsion spring 73 is sleeved on the corresponding active shaft and connected to the inner wall of the air inlet cavity 12 and the side wall of the corresponding diverter branch plate 61.

[0049] Reference Figure 6 and Figure 7 Each flow branch plate 61 is arc-shaped, and the side walls of the two flow branch plates 61 included in the group of flow branch plates 6 closest to the symmetric center are provided with a butt-jointed arc surface 611, and a plug-in gap 65 is provided between the two flow branch plates 61 included in the group of flow branch plates 6 closest to the symmetric center. The push plate 71 is inserted into the plug-in gap 65 and contacts the butt-jointed arc surface 611, and can slide toward or away from the active rotating shaft 64 by the driving of the sliding component 72, wherein the sliding component 72 can be a cylinder connected to the end of the push plate 71; through the sliding component 72 drives the push plate 71 to move toward the direction approaching the active rotating shaft 64, so that the plug-in gap 65 is expanded by the push of the push plate 71, thereby making the two diverter branches 61 included in each group of diverter plates 6 move away from each other, and the reset torsion spring 73 is deformed at this time; and when the push plate 71 moves in the direction away from the active rotating shaft 64, the push plate 71 releases the push on the diverter branch plate 61, so that all the diverter branch plates 61 are moved and reset together in the direction approaching the plug-in gap 65 under the elastic force of the reset torsion spring 73 and the connection action of the connecting rod 63.

[0050] Reference Figure 6 and Figure 7Each connecting rod 63 is also rotatably connected with a docking rod 74. The moving paths formed by the docking rods 74 corresponding to all the diverter branches 61 belonging to different diverter plates 6 and located on the same side of the symmetric center and moving with the active rotating shaft as the center of the circle overlap each other. A guide vane 77 is provided on the docking rod 74. A gear 75 is also sleeved on each docking rod 74. The gears 75 corresponding to all the diverter branches 61 belonging to different diverter plates 6 and located on the same side of the symmetric center are commonly meshed and connected with a docking arc plate 76. The docking arc plate 76 is arc-shaped and is arranged concentrically with the moving path of the connecting rod 63 (the center of the circle is the position of the corresponding active rotating shaft 64). The docking arc plate 76 is embedded in the bottom wall of the air inlet cavity 12, so that when the connecting rod 63 moves with the diverter branch plate 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 vane 77 to rotate, thereby accelerating the flow speed of the cold air in the diverter channel 62.

[0051] Reference Figure 8 and Fig. 9 , and also includes an opening and closing member 9 and a baffle 8. Each air delivery plate 22 is provided with a baffle 8 at one end located at the exhaust chamber 14. The opening and closing member 9 is used to drive the baffle 8 to slide so that the baffle 8 opens and closes the vent hole 221 during the sliding process and is connected to the exhaust chamber 14.

[0052] Reference Figure 8 and Fig. 9 Specifically, the opening and closing member 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 included in each battery pack 2 are connected to the same docking plate 93, and the docking plate 93 is slidably connected to the inner wall of the exhaust cavity 14 along the length direction of the exhaust cavity 14. Each docking plate 93 in each exhaust cavity 14 corresponds to a driven shaft 91, and the driven shaft 91 is rotatably connected to the corresponding exhaust cavity 14, and the driven shafts 91 in the exhaust cavities 14 of adjacent layers are coaxially arranged and connected at their ends. The driven shaft 91 in the exhaust cavity 14 at the top is connected to the driving shaft 64 through a gear set, so that when the driving shaft 64 rotates, all the driven shafts 91 also realize self-rotation, and the rotation direction of the driven shaft 91 is the same as that of the driving shaft 64 connected thereto.

[0053] Reference Figure 8 and Fig. 9 Each driven shaft 91 corresponds to a docking ring 92, and the docking ring 92 is fixedly sleeved on the outside of the corresponding driven shaft 91. A tooth block 921 is provided on the peripheral wall of the docking ring 92, and a tooth groove is provided on the side wall of the docking plate 93 close to the driven shaft 91 for meshing with the tooth block 921 on the surface of the docking ring 92.

[0054] In other embodiments, reference Fig.10When the reset torsion spring 73 on the active shaft 64 is not deformed, that is, when the active shaft 64 is not rotating, the tooth block 921 on the docking ring 92 on the driven shaft 91 in different exhaust chambers 14 is at different positions relative to the docking plate 93, so that when the active shaft 64 rotates, the docking rings 92 in the exhaust chambers 14 at different heights can be rotated to the position meshed with the corresponding docking plate 93 in sequence from top to bottom in the height direction of the cabinet 1, that is, the baffles 8 in the exhaust chambers 14 at corresponding heights can sequentially close the corresponding vents 221 in sequence from top to bottom in the height direction of the cabinet 1. When the active shaft 64 is reversed and reset under the action of the reset torsion spring 73, the baffles 8 at different heights can sequentially open the corresponding vents 221 in sequence from bottom to top by virtue of the meshing action of the tooth block 921 on the docking ring 92 and the docking plate 93.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air-cooled battery cabinet system, comprising a cabinet body (1), wherein a battery pack (2) is arranged in the cabinet body (1), characterized in that: It also includes a cooling device (4) and a gas delivery device (5), wherein the cooling device (4) is used to deliver a refrigerant into the cabinet (1), and the gas delivery device (5) is arranged at a position of the cabinet close to the battery pack (2) to deliver the refrigerant to the battery pack (2) so that the refrigerant is in contact with the battery pack (2); The refrigerant is cold air, an air inlet cavity (12) is provided on the top of the cabinet (1), and the lower part of the cabinet (1) is divided into an air delivery cavity (13) and an air exhaust cavity (14) by the battery pack (2); air vents (221) are provided between adjacent battery packs (2) arranged along the length direction of the air delivery cavity (13) and the air exhaust cavity (14), and the air delivery cavity (13) and the air exhaust cavity (14) are connected via the air vents (221); the air inlet cavity (12) is connected to the air delivery cavity (13); The air inlet cavity (12) is further provided with a plurality of groups of splitter plates (6), each group of splitter plates (6) includes two symmetrically arranged splitter branches (61), a splitter channel (62) for cold air to pass through is formed between two adjacent splitter branches (61) of different splitter plates (6), and the splitter channel (62) is connected to the air delivery cavity (13); the splitter element (7) is also provided, and the splitter element (7) is used to drive each group of splitter plates (6) to move so that the two splitter branches (61) of the same splitter plate (6) move toward or away from each other; A connecting rod (63) is commonly connected between two adjacent flow dividing branches (61) of the same flow dividing plate (6); two flow dividing branches (61) included in a group of flow dividing plates (6) closest to the symmetry center are respectively provided with an active rotating shaft (64), and the active rotating shaft (64) is rotatably connected to the air inlet cavity (12); the flow dividing member (7) comprises a push plate (71), a sliding member (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 dividing branch plate (61) and the inner wall of the air inlet cavity (12); A plug-in gap (65) for inserting a push plate (71) is reserved between two flow diversion branches (61) included in a group of diversion plates (6) closest to the symmetry center, and a butt-jointed arc surface (611) is provided on the side walls of the two flow diversion branches (61) included in the group of diversion plates (6) closest to the symmetry center. The push plate (71) is inserted in the plug-in gap (65) and contacts the butt-jointed 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 toward the direction away from the active rotating shaft (64), the return torsion spring (73) is used to drive the flow diversion branches (61) to move toward each other. An air delivery plate (22) is inserted between two adjacent battery packs (2) arranged along the length direction of the exhaust cavity (14) and the air delivery cavity (13), the air delivery plate (22) is in contact with the surface of the battery pack (2), and the vent hole (221) is provided on the air delivery plate (22); a baffle (8) is provided at one end of the air delivery plate (22) close to the exhaust cavity (14), and also includes an opening and closing member (9), the opening and closing member (9) is used to drive the baffle plate (8) to move, so that the baffle plate (8) opens and closes the communication position between the vent hole (221) and the exhaust cavity (14) during the movement; The opening and closing member (9) comprises a driven shaft (91) arranged in an exhaust cavity (14) at each height, a docking ring (92) sleeved on each driven shaft (91), and a docking plate (93) arranged in 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) located at the top is transmission-connected to the end of the driving shaft; all baffles (8) in the exhaust cavity (14) at each height and on the same side are connected to the same docking plate (93); the docking plate (93) is slidably connected in the corresponding exhaust cavity (14); a tooth block (921) is provided on the side wall of the docking ring (92); and a tooth groove for meshing with the tooth block (921) of the docking plate (93) is provided on the side wall of the docking plate (93).

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

3. The air-cooled battery cabinet system according to claim 2, characterized in that: The space size of the air delivery cavity (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 guide vane (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 of the circle; the docking arc plate (76) is arranged in the air intake cavity (12); the gears (75) corresponding to all the diversion branch plates (61) belonging to different diversion plates (6) and located on the same side of the plug-in gap (65) are all meshed with the corresponding docking arc plate (76), the guide blade (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 member (9) is used to sequentially open and close the communication position between the vent hole (221) and the exhaust cavity (14) at each height along the height direction of the gas delivery cavity (13).

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