Shell and battery pack

Abstract

The utility model relates to a shell and a battery pack, and relates to the technical field of batteries, the shell comprises a cover plate, a bottom plate, a side plate and a hollow air duct plate, the hollow air duct plate is provided with a first air opening communicated with a hollow cavity of the hollow air duct plate, the side plate is provided with a second air opening, the cover plate, the bottom plate, the side plate and the hollow air duct plate jointly form a containing cavity, and the hollow air duct plate is provided with a second air opening. A cooling air duct is arranged on the side, away from the containing cavity, of the bottom plate, and the first air opening, the cooling air duct and the second air opening communicate with one another. Through the arrangement of the cooling air channel, the hollow air channel plate, the first air openings in the hollow air channel plate and the second air openings in the side plates, a penetrating air channel formed by converging and communicating three-dimensional air channels in multiple directions is formed, and therefore cooling and heat dissipation work can be carried out on objects placed in the containing cavity in multiple directions; and the problem of cooling of the battery cell in a high-temperature environment can be solved through a multi-azimuth heat dissipation cooling mode, so that the problem of service life of the battery cell in the high-temperature environment can be effectively solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a housing and a battery pack. Background Art

[0002] Battery cell storage temperature refers to the temperature range that a battery or battery cell can withstand during storage. As a storage device, the performance and life of a battery are closely related to temperature. Therefore, the correct storage temperature is crucial to protect the battery cell from damage and extend its service life.

[0003] At present, the cooling method for the battery cells in indoor battery packs is mainly to use fans to blow air directly into the gaps between the battery cells inside the battery pack, forming air-cooling inside the pack; however, due to the indoor direct ventilation type of internal cooling of the battery pack, it cannot be directly applied to outdoor scenes and must be provided with a cabinet for IP protection, resulting in high product costs.

[0004] The existing technology mainly uses liquid cooling or air cooling to cool outdoor high IP-level battery packs, forming a single-sided liquid cooling plate conduction at the bottom of the battery cell installation or a single-sided air cooling conduction by a fan on the outside of the bottom plate of the battery pack structure. However, the external cooling method used in outdoor scenarios is currently single-sided conduction cooling from the bottom, which has a high cost for bottom liquid cooling, is difficult to install and maintain, and is prone to condensation. In addition, the bottom external air cooling method only has a single side of the small flat surface of the battery cell in contact with the bottom, resulting in insufficient cooling capacity of the battery cell and high energy consumption, and cannot effectively solve the life problem of the battery cell in high temperature environments. Utility Model Content

[0005] In order to solve the problem of cooling battery cells in a high temperature environment, the present application provides a housing and a battery pack.

[0006] The present application provides a housing and a battery pack using the following technical solutions:

[0007] A shell includes a cover plate, a bottom plate, a side plate and a hollow air duct plate, the hollow air duct plate is provided with a first air outlet connected to a cavity therein, the side plate is provided with a second air outlet, the cover plate, the bottom plate, the side plate and the hollow air duct plate together form a accommodating cavity, a cooling air duct is provided on a side of the bottom plate away from the accommodating cavity, and the first air outlet, the cooling air duct and the second air outlet are connected to each other.

[0008] By adopting the above-mentioned technical scheme, utilizing the setting of the cooling air duct, the hollow air duct plate and the first air outlet thereon, and the second air outlet on the side plate, when working, air enters from the first air outlet through the cavity therein and converges at the cooling air duct at the bottom. In this process, part of the air will directly enter the cooling air duct, thereby forming a through air duct in which three-dimensional air ducts in multiple directions converge and connect, so as to realize multi-directional cooling of the objects in the accommodating cavity during the movement of air; thereby, the objects placed in the accommodating cavity can be cooled and dissipated in a multi-directional manner, and the multi-directional heat dissipation cooling method can solve the problem of cooling the battery cells in a high temperature environment, thereby effectively solving the problem of the life of the battery cells in a high temperature environment; and through the setting of the accommodating cavity formed by the cover plate, the bottom plate, the side plate and the hollow air duct plate, a protective structure can be formed for the objects in the accommodating cavity, so that the shell of the present application can be suitable for battery packs with high IP levels and play an IP protection role for them.

[0009] In a specific possible implementation mode, a plurality of air guide strips are provided in the hollow cavity of the hollow air duct plate, and an air guide channel is formed between adjacent air guide strips, and the air guide channel is connected to both the first air outlet and the cooling air duct.

[0010] By adopting the above technical solution, a number of air guide strips arranged in the hollow cavity of the hollow air duct plate can be used to form a plurality of air guide channels in the hollow cavity, thereby controlling the flow direction of the air, making the air move and thus accelerating the air flow rate, thereby achieving a better air supply effect and improving the overall cooling effect.

[0011] In a specific possible implementation mode, the plurality of air guide strips are arranged in parallel and evenly distributed along the length direction of the hollow air duct plate, and the plurality of air guide strips form an angle of 0°-90° with the length direction of the hollow air duct plate.

[0012] By adopting the above technical solution, a number of air guide strips are arranged in parallel and evenly distributed along the length direction of the hollow air duct plate, so that the air guide strips can guide the air flow more evenly, and can also speed up the speed of air flowing to the side of the second air outlet, thereby improving the overall cooling effect. During the air flow process, the air in the air guide channel can better cool the objects in the accommodating cavity, and can achieve the purpose of converging and cooling the bottom air duct.

[0013] In a specific feasible implementation manner, the first air outlet comprises a plurality of air holes, which are arranged in one-to-one correspondence with the air guide channels, and the air holes are arranged on the top side of the hollow air duct plate close to the cover plate and on the side of the hollow air duct plate away from the second air outlet.

[0014] By adopting the above technical solution, during cooling, air enters the air guide channel from several air holes on the top and side of the hollow air duct plate, so that the air can enter the air guide channel more evenly to perform laterally cooling on the objects in the accommodating cavity, thereby improving the cooling effect.

[0015] In a specific feasible implementation scheme, a third air outlet is opened on one side of several of the air guide channels close to the cooling air duct, the third air outlet corresponds one-to-one with the air hole, and the third air outlet is arranged on the bottom side of the hollow air duct plate close to the bottom plate.

[0016] By adopting the above technical solution, during cooling, air enters the air guide channel from several air holes on the top and side of the hollow air duct plate, and flows into the cooling channel through the third air outlet on the bottom of the air guide channel, so that the air can converge in the bottom cooling air duct, and flow out from the second air outlet through the cooling air duct, thereby realizing multi-directional three-dimensional cooling and improving the cooling effect.

[0017] In a specific possible implementation manner, the second air outlet is further provided with a fan.

[0018] By adopting the above technical solution and utilizing the fan arranged on the second air outlet, the fan can speed up the air flow, so that the air entering from the first air outlet and the cooling air duct can flow out from the second air outlet faster, thereby speeding up the air flow speed and enhancing the overall cooling effect.

[0019] In a specific possible implementation manner, the second air outlet is further provided with a plurality of air guide plates, and the air guide plates are located between the fan and the cooling air duct.

[0020] By adopting the above technical solution, utilizing the air guide plate arranged on the second air outlet, and arranging the air guide plate between the fan and the cooling air duct, it is possible to control the flow direction of the air, thereby making the air move and thus speeding up the air flow rate, speeding up the outflow of air from the cooling air duct to the second air outlet, thereby improving the overall cooling effect.

[0021] In a specific possible implementation scheme, the side plate includes a first side plate and a second side plate, the second air outlet is arranged on the second side plate, the first side plate is provided with a fourth air outlet, and the fourth air outlet is connected to the cooling air duct.

[0022] By adopting the above technical solution and utilizing the setting of the fourth air outlet, air can directly enter the cooling air duct from the fourth air outlet to cool the bottom of the object in the accommodating cavity, thereby enhancing the cooling effect of the bottom and further improving the overall cooling effect.

[0023] In a specific possible implementation scheme, the shell also includes an installation frame, and the cover plate, the bottom plate, the side plate and the hollow air duct plate jointly enclose the installation frame to form the accommodating cavity, and the cover plate, the side plate and the hollow air duct plate are all connected to the installation frame by screws.

[0024] By adopting the above-mentioned technical solution, during installation, the side panels and the hollow air duct panel are connected to the installation frame by screws, the object is placed in the accommodating cavity, and then the cover plate is connected to the installation frame by screws, thereby forming an accommodating cavity to enclose the object in the accommodating cavity, thereby forming a protective structure for the object in the accommodating cavity, so that the shell of the present application can be suitable for battery packs with high IP levels and provide IP protection for them.

[0025] In a specific possible implementation manner, a heat dissipation tooth structure is provided on a side of the bottom plate close to the cooling air duct.

[0026] By adopting the above technical solution, a heat dissipation tooth structure is provided on one side of the bottom plate close to the cooling air duct. The heat dissipation tooth structure can accelerate the flow of air flowing into the cooling air duct, thereby accelerating the speed at which air flows out of the cooling air duct from the second air outlet, thereby improving the overall cooling effect.

[0027] A battery pack includes a battery cell. The battery pack has a shell as described above, and the battery cell is placed in the accommodating cavity.

[0028] By adopting the above-mentioned technical scheme, the battery cell is placed in the accommodating cavity of the shell provided in the present application, so that the battery cell placed in the accommodating cavity can be cooled and dissipated in multiple directions. The multiple-directional heat dissipation cooling method can solve the problem of cooling the battery cell in a high-temperature environment, thereby effectively solving the problem of the life of the battery cell in a high-temperature environment; and through the setting of the accommodating cavity formed by the cover plate, the bottom plate, the side plate and the hollow air duct plate, a protective structure can be formed for the battery cell in the accommodating cavity, so that the shell of the present application can be suitable for battery packs with high IP levels and play an IP protection role for them.

[0029] In a specific possible implementation manner, the outer wall of the battery core is in contact with and fits with the bottom plate and the inner wall of the hollow air duct plate.

[0030] By adopting the above technical solution, the outer wall of the battery cell is in contact with the bottom plate and the inner wall of the hollow air duct plate; thereby, the air cooling on the hollow air duct plate and the bottom plate can directly act on the battery cell due to the fitting arrangement, and a three-dimensional cooling system can be formed for the battery cell, thereby improving the cooling effect of the battery cell.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. The present application mainly forms an active external through-air cooling system through a fan, an air guide channel on a hollow air duct plate, and a cooling air duct at the bottom, which can accelerate air flow and effectively reduce the temperature of objects in the accommodating cavity; and through the bonding of the battery cell with the bottom plate and the hollow air duct plate, the air guide channel and the cooling air duct form a sandwich air duct for the battery cell, thereby forming a multi-directional three-dimensional cooling system for the battery cell, thereby solving the life problem of the battery cell in a high temperature environment;

[0033] 2. The present application utilizes a plurality of air guide strips arranged in the hollow cavity of the hollow air duct plate to form a plurality of air guide channels in the hollow cavity, thereby controlling the flow direction of the air, making the air move and thus speeding up the air flow speed, thereby achieving a better air supply effect and improving the overall cooling effect;

[0034] 3. The present application places the battery cells of the battery pack in the accommodating cavity of the shell provided in the present application, thereby being able to perform multi-directional cooling and heat dissipation work on the battery cells placed in the accommodating cavity. The multi-directional heat dissipation cooling method can solve the problem of cooling the battery cells in a high-temperature environment, thereby being able to effectively solve the problem of the life of the battery cells in a high-temperature environment; and through the setting of the accommodating cavity formed by the cover plate, the bottom plate, the side plate and the hollow air duct plate, a protective structure can be formed for the battery cells in the accommodating cavity, so that the shell of the present application can be suitable for battery packs with high IP levels and play an IP protection role for them. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a shell in an embodiment of the present application.

[0036] Figure 2 It is an exploded view used to show the cover plate, bottom plate, side plate and hollow duct plate.

[0037] Figure 3 It is a schematic diagram used to show the structure of the hollow air duct plate.

[0038] Figure 4 It is a cross-sectional view used to show the air guide strips and air guide channels in the hollow air duct plate.

[0039] Figure 5 It is a structural schematic diagram for showing the cooling air duct and the fourth air outlet.

[0040] Explanation of the accompanying drawings: 1. Cover plate; 11. Mounting groove; 2. Bottom plate; 21. Heat dissipation tooth structure; 3. Side plate; 31. First side plate; 311. Fourth air outlet; 32. Second side plate; 321. Second air outlet; 4. Hollow air duct plate; 41. First air outlet; 411. Wind hole; 42. Wind guide strip; 43. Wind guide channel; 44. Third air outlet; 5. Accommodating chamber; 6. Cooling air duct; 7. Fan; 8. Air guide plate; 9. Mounting frame; 10. Screw; 101. Mounting hole. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-5 This application is described in further detail.

[0042] Embodiment 1

[0043] Reference Figure 1 and Figure 2 , the embodiment of the present application discloses a shell, the shell includes a cover plate 1, a bottom plate 2, a side plate 3 and a hollow air duct plate 4. In this embodiment, the cover plate 1, the bottom plate 2, the side plate 3 and the hollow air duct plate 4 are all rectangular plates, and there are two hollow air duct plates 4. The two hollow air duct plates 4 are arranged opposite to each other and are arranged along the length direction of the bottom plate 2. The two hollow air duct plates 4 are both provided with a first air outlet 41 connected to the cavity therein;

[0044] In this embodiment, two side panels 3 are provided, the two side panels 3 are arranged opposite to each other and are arranged along the width direction of the bottom plate 2, the side panels 3 include a first side panel 313 and a second side panel 323, the second side panel 323 is provided with a second air outlet 321, and the first side panel 313 is provided with a fourth air outlet 311. In this embodiment, the second air outlet 321 and the fourth air outlet 311 are both arranged close to the bottom plate 2;

[0045] The cover plate 1, the bottom plate 2, the side plate 3 and the hollow air duct plate 4 together form a receiving cavity 5. A cooling air duct 6 is provided on a side of the bottom plate 2 away from the receiving cavity 5. The fourth air port 311, the first air port 41, the cooling air duct 6 and the second air port 321 are connected to each other. In this embodiment, air enters the hollow cavity of the hollow air duct plate 4 from the first air port 41 and flows to the cooling air duct 6 to form a lateral cooling system for the object in the receiving cavity 5. Air enters the cooling air duct 6 from the fourth air port 311 to form a bottom cooling system for the object in the receiving cavity 5. Thus, a multi-directional three-dimensional cooling system is formed for the object in the receiving cavity 5.

[0046] The housing further includes a mounting frame 9, the cover plate 1, the bottom plate 2, the side plate 3 and the hollow air duct plate 4 jointly enclose the mounting frame 9 to form a receiving chamber 5, the cover plate 1, the side plate 3 and the hollow air duct plate 4 are all connected to the mounting frame 9 by screws 10, in this embodiment, the cover plate 1 is provided with a mounting groove 11, and the hollow air duct plate 4, the side plate 3 and the mounting groove 11 of the cover plate 1 are all provided with mounting holes 101 for the screws 10 to pass through for installation;

[0047] During installation, the side panels 3 and the hollow air duct panel 4 are connected to the installation frame 9 by means of screws 10, the object is placed in the accommodating cavity 5, and the cover panel 1 is connected to the installation frame 9 by means of screws 10, thereby forming the accommodating cavity 5 to enclose the object in the accommodating cavity 5, so as to form a protective structure for the object in the accommodating cavity 5;

[0048] During operation, air enters from the first air outlet 41 through the cavity thereof and converges at the cooling air duct 6 at the bottom and is discharged from the second air outlet 321. During this process, part of the air will directly enter the cooling air duct 6 through the fourth air outlet 311 and be discharged from the second air outlet 321, thereby forming a through air duct in which three-dimensional air ducts in multiple directions converge and connect, so that the objects in the accommodating cavity 5 can be cooled in all directions during the movement of the air; thereby, the objects placed in the accommodating cavity 5 can be cooled and dissipated in all directions, and the all-directional heat dissipation cooling method can solve the problem of cooling the objects in the accommodating cavity 5 under high temperature environment, thereby effectively solving the problem of the life of the objects in the accommodating cavity 5 under high temperature environment.

[0049] Reference Figure 3 and Figure 4 A plurality of air guide strips 42 are connected to the inner wall of the hollow cavity of the hollow air duct plate 4, and an air guide channel 43 is formed between adjacent air guide strips 42, and the air guide channel 43 is connected to the first air outlet 41 and the cooling air duct 6; the multiple air guide channels 43 formed by the plurality of air guide strips 42 can control the flow direction of the air, and can also make the air move to speed up the air flow rate, so as to achieve a better air supply effect, thereby improving the overall cooling effect.

[0050] The plurality of air guide strips 42 are arranged in parallel, and the plurality of air guide strips 42 are evenly distributed along the length direction of the hollow air duct plate 4; thus, the air guide strips 42 can guide the flow of air more evenly, thereby improving the overall cooling effect;

[0051] The plurality of air guide strips 42 and the length direction of the hollow air duct plate 4 are all at an angle of 0°-90°. In this embodiment, the angle between the inclined surface of the air guide strip 42 and the surface of the hollow air duct plate 4 close to the bottom plate 2 is an acute angle or a right angle on the vertical projection plane, and the angle ranges from 0° to 90°.

[0052] Therefore, the air guide strip 42 can directly guide the air to the bottom cooling air duct 6 close to the second air outlet 321 , thereby accelerating the speed of air flowing to the second air outlet 321 , thereby improving the overall cooling effect.

[0053] The first air outlet 41 includes a plurality of air holes 411, which are arranged one by one in correspondence with and communicated with the air guide channel 43. The air holes 411 are arranged on the top side of the hollow air duct plate 4 close to the cover plate 1 and on the side of the hollow air duct plate 4 away from the second air outlet 321.

[0054] A third air outlet 44 is provided on one side of the plurality of air guide channels 43 close to the cooling air channel 6. The third air outlet 44 is arranged in one-to-one correspondence with the air hole 411. The third air outlet 44 is arranged on the bottom side of the hollow air channel plate 4 close to the bottom plate 2.

[0055] During cooling, the air enters the air guide channel 43 from the air hole 411 and then flows out from the third air outlet 44 to converge in the cooling air duct 6 at the bottom, and flows out from the second air outlet 321 through the cooling air duct 6. The air converges in the cooling air duct 6 at the bottom to cool the bottom of the object in the accommodating cavity 5, thereby realizing multi-directional cooling of the object in the accommodating cavity 5 by the air.

[0056] Reference Figure 4 and Figure 5 The second air outlet 321 is also provided with a fan 7. In the present embodiment, the fan 7 drives the air flow by exhausting. Specifically, when the fan 7 is started during operation, the fan 7 drives part of the air from the plurality of air holes 411 of the first air outlet 41 into the air guide channel 43 by exhausting, and then flows out from the third air outlet 44 and converges in the cooling air duct 6 at the bottom and is extracted from the second air outlet 321, thereby forming a lateral cooling system for the object in the accommodating cavity 5; at the same time, the fan 7 drives part of the air from the fourth air outlet 311 to directly flow into the cooling air duct 6 and is extracted from the second air outlet 321, thereby forming a bottom cooling system for the object in the accommodating cavity 5;

[0057] Thereby, the air guide channel 43 on the hollow air duct plate 4 and the cooling air duct 6 at the bottom form an active outside-enclosed through-air refrigeration cooling system, forming a double-walled air duct, which can speed up the air flow and effectively reduce the temperature of the objects in the accommodating cavity 5, so that the air entering from the first air outlet 41 and the cooling air duct 6 can be drawn out from the second air outlet 321 more quickly, thereby speeding up the air flow speed, thereby effectively reducing the temperature of the objects in the accommodating cavity 5 and enhancing the overall cooling effect.

[0058] A plurality of air guide plates 8 are also provided on the second air outlet 321. In the present embodiment, the plurality of air guide plates 8 are arranged in parallel and evenly distributed along the length direction of the second air outlet 321, and the plurality of air guide plates 8 are arranged along the width direction of the second air outlet 321. The plurality of air guide plates 8 are located between the fan 7 and the cooling air duct 6; thereby, the air flow direction can be controlled, the air can be moved, and the air flow speed can be accelerated, which accelerates the effect of air flowing out from the cooling air duct 6 to the second air outlet 321, thereby improving the overall cooling effect.

[0059] The present application also provides a battery pack, the battery pack includes a battery cell, and the battery pack has a shell as described above (please refer to Figure 1-5 ), the battery cell is placed in the accommodating cavity 5;

[0060] Preferably, the outer wall of the battery cell is in contact with and fits with the bottom plate 2 and the inner wall of the hollow air duct plate 4; thereby, the air cooling on the hollow air duct plate 4 and the bottom plate 2 can directly act on the battery cell due to the fitting arrangement, and a three-dimensional cooling system can be formed for the battery cell, thereby improving the cooling effect of the battery cell;

[0061] By placing the battery cells of the battery pack in the accommodating cavity 5 of the shell provided in the present application, the battery cells placed in the accommodating cavity 5 can be cooled and dissipated in multiple directions. The multiple-directional heat dissipation cooling method can solve the problem of cooling the battery cells in a high-temperature environment, thereby effectively solving the problem of the life of the battery cells in a high-temperature environment; and through the setting of the accommodating cavity 5 formed by the cover plate 1, the bottom plate 2, the side plate 3 and the hollow air duct plate 4, a protective structure can be formed for the battery cells in the accommodating cavity 5, so that the shell of the present application can be suitable for battery packs with high IP levels and play an IP protection role for them.

[0062] The implementation principle of the embodiment of the present application is as follows: the present application mainly forms an active external through-air cooling system through the fan 7, the air guide channel 43 on the hollow air duct plate 4 and the cooling air duct 6 at the bottom; and through the battery cell being fitted with the bottom plate 2 and the hollow air duct plate 4, the air guide channel 43 and the cooling air duct 6 form a sandwich air duct for the battery cell, thereby forming a multi-directional three-dimensional cooling system for the battery cell, thereby solving the problem of the battery cell life in a high temperature environment;

[0063] During installation, the side panels 3 and the hollow air duct plate 4 are connected to the installation frame 9 by screws 10, and the battery cells of the battery pack are placed in the accommodating cavity 5. At this time, the outer wall of the battery cell is in contact with the inner wall of the bottom plate 2 and the hollow air duct plate 4, and then the cover plate 1 is connected to the installation frame 9 by screws 10, so as to form an accommodating cavity 5 to enclose the battery cell in the accommodating cavity 5, so as to form a protective structure for the battery cell in the accommodating cavity 5, so that the housing of the present application can be suitable for battery packs with high IP levels and play an IP protection role for them;

[0064] When working, the fan 7 is started, and the fan 7 drives part of the air from the plurality of air holes 411 of the first air outlet 41 into the air guide channel 43 by exhausting, and then flows out from the third air outlet 44 to converge in the cooling air duct 6 at the bottom and is extracted from the second air outlet 321, thereby forming a lateral cooling system for the object in the accommodating cavity 5; at the same time, the fan 7 drives part of the air from the fourth air outlet 311 to directly flow into the cooling air duct 6 and is extracted from the second air outlet 321, thereby forming a bottom cooling system for the object in the accommodating cavity 5;

[0065] Under the action of the fan 7, the fan 7 can make the air guide channel 43 on the hollow air duct plate 4 and the cooling air duct 6 at the bottom form an active outside-through air cooling cooling system, and can also speed up the air flow, effectively reducing the temperature of the object in the accommodating cavity 5; and in this process, since the outer wall of the battery cell is in contact with the bottom plate 2 and the inner wall of the hollow air duct plate 4, a sandwich wall air duct is formed, thereby forming a three-dimensional cooling system for the battery cell;

[0066] Thereby, a through air duct is formed in the accommodating cavity 5, where three-dimensional air ducts converge and connect in multiple directions. In the process of air movement, multi-directional cooling of the objects in the accommodating cavity 5 is achieved, so that the objects placed in the accommodating cavity 5 can be cooled and dissipated in multiple directions. The multi-directional heat dissipation cooling method can solve the problem of cooling the battery cells in a high temperature environment, thereby effectively solving the problem of the life of the battery cells in a high temperature environment.

[0067] Embodiment 2

[0068] The housing structure of this embodiment is the same as that of the first embodiment. Figure 1-5 , the difference between this embodiment and the first embodiment is that the fan 7 in this embodiment drives the air flow by blowing;

[0069] Specifically: when the fan 7 is working, the fan 7 drives the air to blow from the second air port 321 into the cooling air duct 6 by blowing. At this time, the fan 7 drives part of the air in the cooling air duct 6 to flow from the third air port 44 into the air guide channel 43 by blowing on the cooling air duct 6, and then drives the air in the air guide channel 43 to be blown out from the plurality of air holes 411 of the first air port 41, thereby forming a lateral cooling system for the objects in the accommodating chamber 5; at the same time, the fan 7 drives part of the air in the cooling air duct 6 to be blown out directly from the fourth air port 311, thereby forming a bottom cooling system for the objects in the accommodating chamber 5;

[0070] Thereby, the air guide channel 43 on the hollow air duct plate 4 and the cooling air duct 6 at the bottom form an active outside-enclosed through-air refrigeration cooling system, forming a double-walled air duct, which can accelerate the air flow and effectively reduce the temperature of the objects in the accommodating cavity 5, so that the air blown in from the second air outlet 321 can be blown out to the first air outlet 41 and the fourth air outlet 311 through the cooling air duct 6 more quickly, thereby accelerating the air flow speed, thereby effectively reducing the temperature of the objects in the accommodating cavity 5 and enhancing the overall cooling effect.

[0071] 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. A housing, characterized in that: It includes a cover plate, a bottom plate, a side plate and a hollow air duct plate, the hollow air duct plate is provided with a first air outlet connected to the hollow cavity therein, the side plate is provided with a second air outlet, the cover plate, the bottom plate, the side plate and the hollow air duct plate together form a accommodating cavity, the bottom plate is provided with a cooling air duct on a side away from the accommodating cavity, and the first air outlet, the cooling air duct and the second air outlet are connected.

2. The housing according to claim 1, characterized in that: A plurality of air guide strips are arranged in the hollow cavity of the hollow air duct plate, and an air guide channel is formed between adjacent air guide strips. The air guide channel is connected to both the first air outlet and the cooling air duct.

3. The housing according to claim 2, characterized in that: The plurality of air guide strips are arranged in parallel and evenly distributed along the length direction of the hollow air duct plate, and the plurality of air guide strips form an angle of 0°-90° with the length direction of the hollow air duct plate.

4. The housing according to claim 2, characterized in that: The first air outlet includes a plurality of air holes, which are arranged in one-to-one correspondence with the air guide channel. The air holes are arranged on the top side of the hollow air duct plate close to the cover plate and on the side of the hollow air duct plate away from the second air outlet.

5. The housing according to claim 4, characterized in that: A third air outlet is provided on one side of several of the air guide channels close to the cooling air duct, the third air outlet corresponds to the air hole one by one, and the third air outlet is provided on the bottom side of the hollow air duct plate close to the bottom plate.

6. The housing according to claim 1, characterized in that: The second air outlet is also provided with a fan.

7. The housing according to claim 6, characterized in that: The second air outlet is further provided with a plurality of air guide plates, and the air guide plates are located between the fan and the cooling air duct.

8. The housing according to claim 1, characterized in that: The side plate includes a first side plate and a second side plate, the second air outlet is arranged on the second side plate, the first side plate is provided with a fourth air outlet, and the fourth air outlet is communicated with the cooling air duct.

9. The housing according to claim 1, characterized in that: The shell also includes a mounting frame, and the cover plate, the bottom plate, the side plate and the hollow air duct plate jointly enclose the mounting frame to form the accommodating cavity, and the cover plate, the side plate and the hollow air duct plate are all connected to the mounting frame by screws.

10. The housing according to claim 1, characterized in that: A heat dissipation tooth structure is provided on one side of the bottom plate close to the cooling air duct.

11. A battery pack, comprising a battery cell, characterized in that: The battery pack has a shell as described in any one of claims 1 to 10, and the battery cell is placed in the accommodating cavity.

12. The pool package according to claim 11, characterized in that: The outer wall of the battery core is in contact with and fits with the bottom plate and the inner wall of the hollow air duct plate.

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