Shell assembly and battery pack

Abstract

The utility model provides a casing assembly and battery pack, casing assembly includes casing, first fan and second fan, casing forms the mounting cavity, the mounting cavity is used for the battery module installation, casing includes surrounding the side wall of mounting cavity, forms first air duct and second air duct in interval in the side wall, the side wall includes a plurality of side plate that connects in proper order, and the first fan and the second fan are connected in proper order. The first air duct and the second air duct are at least partially located on the side plates facing different directions, the first air duct is provided with a first air inlet and a first air outlet which are communicated with the installation cavity, the second air duct is provided with a second air inlet and a second air outlet which are communicated with the installation cavity, the first fan is installed on the first air duct, and the second fan is installed on the second air duct. At least one heat exchange circulation flow path is formed on the peripheral side of the battery module, hot air flow on the peripheral side of the battery module is promoted to flow and enter the first air channel and the second air channel for heat exchange, heat dissipation dead angles are reduced, and uniform heat dissipation of the battery module is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a shell component and a battery pack. Background Art

[0002] Battery packs will inevitably have heating problems in daily operation. If the heat dissipation and cooling work cannot be completed in time, the heat accumulation in the battery module will lead to many problems such as decreased battery cell electrical performance, capacity attenuation and shortened battery life.

[0003] In the related art, a heat dissipation duct is provided in the shell of the battery pack. However, the existence of the heat dissipation duct makes it difficult to evenly remove the heat from various parts of the battery module, resulting in poor consistency of the internal temperature of the battery pack. Utility Model Content

[0004] The embodiments of the utility model provide a shell assembly and a battery pack, which can improve the problem in the related art that it is difficult to evenly remove the heat from various parts of the battery module by setting a heat dissipation duct in the shell of the battery pack, resulting in poor consistency of the internal temperature of the battery pack.

[0005] In a first aspect, an embodiment of the present invention provides a housing assembly.

[0006] In one embodiment, the housing assembly comprises:

[0007] A housing is formed with an installation cavity, the installation cavity is used for installing a battery module, the housing includes a side wall surrounding the installation cavity, a first air duct and a second air duct are formed in the side wall, the side wall includes a plurality of side panels connected in sequence, the first air duct and the second air duct are at least partially located on side panels facing different directions, the first air duct has a first air inlet and a first air outlet connected to the installation cavity, and the second air duct has a second air inlet and a second air outlet connected to the installation cavity;

[0008] a first fan, installed in the first air duct, for promoting the flow of gas in the first air duct;

[0009] The second fan is installed in the second air duct to promote the flow of gas in the second air duct.

[0010] In one embodiment, the first air duct and the second air duct are both extended along the circumference of the side wall.

[0011] In one embodiment, the first air inlet is disposed opposite to the second air outlet, and the first air outlet is disposed opposite to the second air inlet.

[0012] In one embodiment, the first air duct and the second air duct are disposed adjacent to the top of the housing.

[0013] In one embodiment, the first fan is disposed adjacent to the first air outlet; and / or,

[0014] the second fan is disposed adjacent to the second air outlet.

[0015] In one embodiment, the plurality of side plates include a first side plate and a second side plate disposed opposite to each other;

[0016] The first side plate includes a first base body and a first cover body. The first cover body is disposed on a side of the first base body facing the installation cavity, and the first cover body covers the first base body so that a first air duct is formed by enclosing between the first cover body and the first base body;

[0017] The second side plate includes a second base body and a second cover body. The second cover body is disposed on a side of the second base body facing the installation cavity, and the second cover body covers the second base body so that a second air duct is formed by enclosing between the second cover body and the second base body.

[0018] In one embodiment, the first cover body has a first cover plate disposed opposite to the first base body. The first cover plate is provided with the first air inlet and the first air outlet in a direction away from the first base body; and / or,

[0019] The second cover body has a second cover plate disposed opposite to the second base body. The second cover plate is provided with the second air inlet and the second air outlet in a direction away from the second base body.

[0020] In one embodiment, a heat dissipation structure is further included. The heat dissipation structure is installed on an outer wall surface of the housing, and the heat dissipation structure is used for exchanging heat with the gas in the first air duct and / or the second air duct.

[0021] In one embodiment, the outer wall surface of the housing includes a first outer wall surface and a second outer wall surface. The first outer wall surface corresponds to the first air duct, and the second outer wall surface corresponds to the second air duct;

[0022] The heat dissipation structure includes a plurality of first heat dissipation fins. The plurality of first heat dissipation fins are respectively disposed on the first outer wall surface and / or the second outer wall surface, and the plurality of first heat dissipation fins are arranged at intervals.

[0023] In one embodiment, the housing includes a bottom plate and a top plate. A plurality of heat dissipation air ducts are provided inside the bottom plate and / or the top plate, and each heat dissipation air duct is provided through the bottom plate or the top plate along the length direction corresponding thereto.

[0024] In one embodiment, a plurality of air guiding grooves are provided on the inner bottom wall of the housing, and all of them communicate with the installation cavity. Each of the air guiding grooves extends along the direction from the first air inlet to the second air outlet, and both ends of the air guiding groove extend to the side wall.

[0025] In a second aspect, an embodiment of the present invention provides a battery pack.

[0026] In one embodiment, the battery pack includes the housing assembly as described above.

[0027] In one embodiment, the battery pack further includes a battery module, and the battery module is installed in the installation cavity and is located between the first air duct and the second air duct.

[0028] Advantageous effects of the embodiments of the present invention:

[0029] In the embodiment of the present invention, since the first air inlet, the first air outlet, the second air inlet and the second air outlet are all communicated with the installation cavity, this design enables the hot air flow around the battery module to quickly enter the first air duct and the second air duct from the first air inlet and the second air inlet respectively under the action of the first fan and the second fan. After the hot air flow exchanges heat with the side wall of the housing, it cools down to a cold air flow, and the cold air flow blows from the first air outlet and the second air outlet towards the battery module to continue exchanging heat with the battery module, realizing rapid cooling of the battery module. Since the first air duct and the second air duct are arranged at intervals, at least one heat exchange circulation flow path is formed around the battery module, promoting the flow of the hot air flow around the battery module and respectively entering the first air duct and the second air duct for heat exchange. The cold air flow after heat exchange and cooling can contact the battery module more fully, so as to more effectively take away heat, helping to reduce heat dissipation dead corners and realizing uniform heat dissipation of the battery module. This helps to reduce the temperature gradient inside the battery module and improve the performance and service life of the battery. In addition, since the heat exchange circulation flow path is located in the installation cavity, it prevents the outside atmosphere from entering the installation cavity, enabling the battery pack with the housing assembly to meet the dust and waterproof level requirements. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0031] Figure 1 is a three-dimensional schematic diagram of the housing assembly provided by the embodiment of the present invention;

[0032] Figure 2 is Figure 1Schematic diagram of the structure of the shown housing assembly (partial structure);

[0033] Figure 3 is Figure 2 Schematic diagram of the partial enlargement at the shown position A;

[0034] Figure 4 is Figure 2 Schematic diagram of the partial enlargement at the shown position B;

[0035] Figure 5 Schematic diagram of the structure of the battery pack provided by the embodiment of the present invention;

[0036] Figure 6 is Figure 5 Schematic diagram of the partial enlargement at the shown position C;

[0037] Figure 7 is Figure 5 Schematic diagram of the partial enlargement at the shown position D;

[0038] Figure 8 is Figure 5 Cross-sectional view of the shown battery pack;

[0039] Figure 9 is Figure 8 Schematic diagram of the partial enlargement at the shown position E.

[0040] Explanation of reference numerals:

[0041] 10. Housing assembly;

[0042] 1. Housing, 11. Installation cavity, 12. Side wall, 121. Side plate, 122. First side plate, 1221. First base body, 1222. First cover body, 12221. First cover plate, 123. Second side plate, 1231. Second base body, 1232. Second cover body, 12321. Second cover plate, 124. Third side plate, 125. Fourth side plate, 13. Bottom plate, 14. Top plate, 151. First outer wall surface, 152. Second outer wall surface, 153. Third outer wall surface, 154. Fourth outer wall surface, 16. Inner bottom wall;

[0043] 2. First air duct, 21. First air inlet, 22. First air outlet;

[0044] 3. Second air duct, 31. Second air inlet, 32. Second air outlet;

[0045] 4. First fan;

[0046] 5. Second fan;

[0047] 61. First heat dissipation fin;

[0048] 7. Heat dissipation air duct;

[0049] 8. air guide groove, 81. boss;

[0050] 9. Second heat dissipation fin;

[0051] 20. Battery module;

[0052] 100. Battery pack. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0054] Battery packs will inevitably have heating problems in daily operation. If the heat dissipation and cooling work cannot be completed in time, the heat accumulation in the battery module will lead to many problems such as decreased battery cell electrical performance, capacity attenuation and shortened battery life.

[0055] In the related art, a heat dissipation duct is provided in the shell of the battery pack. However, the existence of the heat dissipation duct makes it difficult to evenly remove the heat from various parts of the battery module, and the internal temperature consistency of the battery pack is poor.

[0056] In view of this, the utility model proposes a housing assembly and a battery pack. Figures 1 to 9 The schematic diagram of the structure of the embodiment of the housing assembly and the battery pack provided by the utility model. The housing assembly provided by the utility model can achieve uniform heat dissipation of the battery module, reduce the temperature gradient inside the battery module, and improve the performance and life of the battery. The battery pack will be described in detail in conjunction with the main drawings.

[0057] Reference Figure 1 , Figure 2 and Figure 8。The housing assembly 10 includes a housing 1, a first fan 4 and a second fan 5. The housing 1 is formed with an installation cavity 11 for installing the battery module 20. The housing 1 includes a side wall 12 surrounding the installation cavity 11. The side wall 12 includes a plurality of side plates 121 connected in sequence. A first air duct 2 and a second air duct 3 are formed in the side wall 12 at intervals. At least part of the first air duct 2 and the second air duct 3 are located on different side plates 121. The first air duct 2 has a first air inlet 21 and a first air outlet 22. The second air duct 3 has a second air inlet 31 and a second air outlet 32. The first air inlet 21, the first air outlet 22, the second air inlet 31 and the second air outlet 32 are all communicated with the installation cavity 11. The first fan 4 is installed in the first air duct 2 to promote the gas flow in the first air duct 2. The second fan 5 is installed in the second air duct 3 to promote the gas flow in the second air duct 3.

[0058] In an embodiment of the present invention, since the first air inlet 21, the first air outlet 22, the second air inlet 31 and the second air outlet 32 are all communicated with the installation cavity 11, this design enables the hot air flow on the periphery of the battery module 20 to quickly enter the first air duct 2 and the second air duct 3 from the first air inlet 21 and the second air inlet 31 respectively under the action of the first fan and the second fan. After the hot air flow exchanges heat with the side wall 12 of the housing 1, it cools down to a cold air flow. The cold air flow blows from the first air outlet 22 and the second air outlet 32 towards the battery module 20 and continues to exchange heat with the battery module 20, realizing rapid cooling of the battery module 20. Since the first air duct 2 and the second air duct 3 are arranged at intervals, at least one heat exchange circulation flow path is formed on the periphery of the battery module 20, promoting the flow of the hot air flow on the periphery of the battery module 20 and respectively entering the first air duct 2 and the second air duct 3 for heat exchange. The cold air flow after heat exchange and cooling can contact the battery module 20 more fully, thereby more effectively taking away heat, helping to reduce the heat dissipation dead angle and realizing uniform heat dissipation of the battery module 20. This helps to reduce the temperature gradient inside the battery module 20 and improve the performance and lifespan of the battery. In addition, since the heat exchange circulation flow path is located in the installation cavity 11, it prevents the outside atmosphere from entering the installation cavity 11, enabling the battery pack with the housing assembly 10 to meet the dust and waterproof level requirements.

[0059] It should be noted that there are various ways to space the first air duct 2 and the second air duct 3 arranged in the side wall 12. For example, in one embodiment, the first air duct 2 and the second air duct 3 can be spaced along the circumferential direction of the side wall 12. In another embodiment, the first air duct 2 and the second air duct 3 can be spaced along the height direction of the housing 1. Specifically, the spacing manner of the first air duct 2 and the second air duct 3 can be set as needed, and the present application does not limit this.

[0060] In addition, the side wall 12 includes a plurality of side plates 121 connected in sequence, and the orientations of the plurality of side plates 121 are all different. Refer to Figure 2 , taking the housing 1 as a cuboid as an example, the side wall 12 of the corresponding housing 1 includes a first side plate 122, a third side plate 124, a second side plate 123, and a fourth side plate 125 connected in sequence. When the first side plate 122 faces left, the corresponding second side plate 123 faces right, the third side plate 124 faces forward, and the fourth side plate 125 faces backward. There are two embodiments in which the first air duct 2 and the second air duct 3 are at least partially located on side plates 121 with different orientations. In one embodiment, a part of the first air duct 2 and a part of the second air duct 3 are located on side plates 121 with different orientations, and another part of the first air duct 2 and another part of the second air duct 3 are located on the same side plate 121. For example, a part of the first air duct 2 is located on the first side plate 122, a part of the second air duct 3 is located on the second side plate 123, and another part of the first air duct 2 and another part of the second air duct 3 are both located on the third side plate 124. Refer to Figure 2 , in another embodiment, the whole of the first air duct 2 and the whole of the second air duct 3 are located on side plates 121 with different orientations. For example, the whole of the first air duct 2 is located on the first side plate 122, and the whole of the second air duct 3 is located on the second side plate 123.

[0061] Refer to Figure 8 , in one embodiment, both the first air duct 2 and the second air duct 3 are arranged to extend circumferentially along the side wall 12. In this way, the circumferentially extending first air duct 2 and second air duct 3 increase the lengths of the first air duct 2 and the second air duct 3. Correspondingly, the heat exchange area between the first air duct 2 and the second air duct 3 and the housing 1 is increased, so that the hot air flow entering the first air duct 2 and the second air duct 3 can be quickly cooled. In addition, the design of the circumferentially extending first air duct 2 and second air duct 3 usually has a relatively smooth flow channel, which helps to reduce the resistance of the air flow during the flow process. Reducing the air flow resistance can reduce the power consumption of the fan and improve the energy efficiency ratio of the heat dissipation system. At the same time, reducing the air flow resistance also helps to maintain the stability of the air flow and avoid affecting the heat dissipation effect due to air flow disorder.

[0062] It should be noted that in other embodiments, the first air duct 2 and the second air duct 3 may also be at least partially bent.

[0063] Refer to Figure 5, in one embodiment, the first air inlet 21 and the second air outlet 32 are oppositely arranged, and the first air outlet 22 and the second air inlet 31 are oppositely arranged. In this way, the hot air flow that has completed heat exchange with the battery module 20 enters the first air duct 2 from the first air inlet 21, exchanges heat with the housing 1 and cools down to a cold air flow, and is discharged from the first air outlet 22. The cold air flow discharged from the first air outlet 22 enters the second air duct 3 from the second air inlet 31 after completing heat exchange with the battery module 20, exchanges heat with the housing 1 and cools down to a cold air flow, and is discharged from the second air outlet 32 after completing heat exchange with the battery module 20, forming an efficient air flow cycle. This air flow cycle not only improves the heat dissipation efficiency but also helps to reduce energy consumption. Through the alternating action of the first air duct 2 and the second air duct 3, the cold air flow and the hot air flow form a dynamic balance around the battery module 20, which helps to reduce the temperature gradient inside the battery module 20 and improve the temperature uniformity. This design helps to take away the heat generated by the battery module 20 in time and avoid the adverse impact of local high temperature on the battery performance. At the same time, through the continuous heat cycle and heat exchange process, the system can maintain a relatively stable working state of the battery module 20. The layout with the first air inlet 21 and the second air outlet 32 oppositely arranged and the first air outlet 22 and the second air inlet 31 oppositely arranged can shorten the mixing distance between the cold air flow and the hot air flow and reduce the mixing loss. The cold air flow can reach the surface of the battery module 20 faster for efficient heat exchange, thereby reducing the temperature of the battery module 20. At the same time, the hot air flow can also enter the first air duct 2 and the second air duct 3 faster to exchange heat with the housing 1, avoiding the accumulation of the hot air flow in the housing 1 and causing the temperature to rise. The layout with the first air inlet 21 and the second air outlet 32 oppositely arranged and the first air outlet 22 and the second air inlet 31 oppositely arranged can guide the air flow to form a relatively uniform temperature field around the battery module 20. The alternating flow of the cold air flow and the hot air flow helps to reduce the temperature gradient inside the battery module 20 and improve the temperature uniformity. This is of great significance for extending the battery life and improving the battery performance. The layout with the first air inlet 21 and the second air outlet 32 oppositely arranged and the first air outlet 22 and the second air inlet 31 oppositely arranged can also reduce the resistance of the air flow during the flow process, thereby reducing the power consumption of the fan and improving the energy efficiency ratio of the heat dissipation system.

[0064] Continue to refer to Figure 5, in one embodiment, the first air duct 2 and the second air duct 3 are disposed adjacent to the top of the housing 1. Thus, since a large amount of heat will accumulate at the top during the operation of the battery module 20, disposing the first air duct 2 and the second air duct 3 adjacent to the top of the housing 1 can directly dissipate heat from this heat-accumulating area. This can ensure that the heat is quickly removed, reduce the temperature of the battery module 20, and improve the heat dissipation efficiency. By disposing the first air duct 2 and the second air duct 3 adjacent to the top of the housing 1, the temperature gradient inside the battery module 20 can be reduced, making the temperature distribution more uniform. In a compact design of the battery module 20, the top space is often relatively abundant. Disposing the first air duct 2 and the second air duct 3 adjacent to the top of the housing 1 can make full use of the top space and avoid competing with the battery module 20 and other internal components for horizontal space.

[0065] Refer to Figures 4 to 6 , in one embodiment, the first fan 4 is disposed adjacent to the first air outlet 22. Thus, it can be ensured that the cold air flow that has completed heat exchange with the housing 1 inside the first air duct 2 is directly and quickly discharged, so that the discharged cold air flow can quickly blow towards the battery module 20, thereby improving the heat dissipation efficiency of the battery module 20. The first fan 4 being adjacent to the first air outlet 22 can reduce the resistance inside the first air duct 2, making the air flow pass more smoothly. This helps to reduce the working load of the first fan 4, improve the energy efficiency ratio, and reduce the noise and vibration generated due to excessive resistance. The position where the first fan 4 is adjacent to the first air outlet 22 is usually relatively open, facilitating cleaning and maintenance. This helps to maintain the cleanliness of the first fan 4 and the first air duct 2, and avoid affecting the heat dissipation effect due to the accumulation of dust and debris. When the first fan 4 fails or needs to be replaced, the design adjacent to the first air outlet 22 can make the replacement process more simple and quick. This helps to reduce the maintenance cost and improve the availability of the system.

[0066] Refer to Figures 4 to 6 , the second fan 5 is disposed adjacent to the second air outlet 32. Thus, it can be ensured that the cold air flow that has completed heat exchange with the housing 1 inside the second air duct 3 is directly and quickly discharged, so that the discharged cold air flow can quickly blow towards the battery module 20, thereby improving the heat dissipation efficiency of the battery module 20. The second fan 5 being adjacent to the second air outlet 32 can reduce the resistance inside the second air duct 3, making the air flow pass more smoothly. This helps to reduce the working load of the second fan 5, improve the energy efficiency ratio, and reduce the noise and vibration generated due to excessive resistance. The position where the second fan 5 is adjacent to the second air outlet 32 is usually relatively open, facilitating cleaning and maintenance. This helps to maintain the cleanliness of the second fan 5 and the second air duct 3, and avoid affecting the heat dissipation effect due to the accumulation of dust and debris. When the second fan 5 fails or needs to be replaced, the design adjacent to the second air outlet 32 can make the replacement process more simple and quick. This helps to reduce the maintenance cost and improve the availability of the system.

[0067] Referring to Figure 2 , Figure 5 and Figure 8 , in one embodiment, the plurality of side plates 121 include a first side plate 122 and a second side plate 123 which are oppositely arranged. The first side plate 122 includes a first base body 1221 and a first cover body 1222. The first cover body 1222 is arranged on the side of the first base body 1221 facing the installation cavity 11, and the first cover body 1222 covers the first base body 1221 so that a first air duct 2 is formed by enclosing between the first cover body 1222 and the first base body 1221. The second side plate 123 includes a second base body 1231 and a second cover body 1232. The second cover body 1232 is arranged on the side of the second base body 1231 facing the installation cavity 11, and the second cover body 1232 covers the second base body 1231 so that a second air duct 3 is formed by enclosing between the second cover body 1232 and the second base body 1231. Thus, an air flow circulation path extending along the circumferential direction of the side part is formed among the first air duct 2, the second air duct 3 and the installation cavity 11. This air flow circulation not only improves the heat dissipation efficiency, but also helps to reduce the energy consumption. Through the alternating action of the first air duct 2 and the second air duct 3, cold air flow and hot air flow form a dynamic balance around the battery module 20, which helps to reduce the temperature gradient inside the battery module 20 and improve the temperature uniformity. This design helps to timely take away the heat generated by the battery module 20 and avoid the adverse impact of local high temperature on the battery performance. The combined design of the first base body 1221 and the first cover body 1222 forms the first air duct 2, which not only makes the processing operation of the first air duct 2 simple, but also enhances the overall structural strength of the first side plate 122. This helps to resist external impacts and vibrations and improve the durability of the first side plate 122. The combined design of the second base body 1231 and the second cover body 1232 forms the second air duct 3, which not only makes the processing operation of the first air duct 2 simple, but also enhances the overall structural strength of the second side plate 123. This helps to resist external impacts and vibrations and improve the durability of the second side plate 123.

[0068] It should be noted that there are various fixing methods between the first base body 1221 and the first cover body 1222. For example, in one embodiment, the first base body 1221 and the first cover body 1222 can be fixedly bonded by glue. In another embodiment, the first base body 1221 and the first cover body 1222 can also be fixed by a screw member. In other embodiments, the first base body 1221 and the first cover body 1222 can also be fixedly welded. The fixing method between the first base body 1221 and the first cover body 1222 can be selected according to needs, and the present application does not limit this. In addition, there are various fixing methods between the second base body 1231 and the second cover body 1232. For example, in one embodiment, the second base body 1231 and the second cover body 1232 can be fixedly bonded by glue. In another embodiment, the second base body 1231 and the second cover body 1232 can also be fixed by a screw member. In other embodiments, the second base body 1231 and the second cover body 1232 can also be fixedly welded. The fixing method between the second base body 1231 and the second cover body 1232 can be selected according to needs, and the present application does not limit this.

[0069] Referring to FIG. Figure 5 and Figure 6 , in one embodiment, the first cover body 1222 has a first cover plate 12221 disposed opposite to the first base body 1221. The first cover plate 12221 is provided with a first air inlet 21 and a first air outlet 22 penetrating along the direction away from the first base body 1221. Thus, the first air inlet 21 and the first air outlet 22 penetrating through the first cover plate 12221 are such that both the first air inlet 21 and the first air outlet 22 face the battery module 20, which can guide the cold air flow to flow more evenly through each part of the battery module 20. This helps to reduce the temperature gradient inside the battery module 20, ensuring that each battery cell can be fully cooled, thereby improving the overall temperature uniformity of the battery pack. In addition, since both the first air inlet 21 and the first air outlet 22 face the battery module 20, the cold air flow discharged from the first air outlet 22 can quickly blow towards the battery module 20, and the hot air flow on the periphery of the battery module 20 can quickly enter the first air inlet 21, thereby improving the heat dissipation efficiency of the battery module 20.

[0070] It should be noted that the present application does not limit the sizes and shapes of the first air inlet 21 and the first air outlet 22. The sizes and shapes of the first air inlet 21 and the first air outlet 22 can be adjusted according to different requirements. For example, in a system that requires large-flow heat exchange, the sizes of the air inlet and the air outlet can be increased. For example, for the convenience of processing, the first air inlet 21 and the first air outlet 22 can be set as circular holes.

[0071] Referring to Figures 7 to 9, in one embodiment, the second cover body 1232 has a second cover plate 12321 disposed opposite to the second base body 1231. The second cover plate 12321 is provided with a second air inlet 31 and a second air outlet 32 penetrating in a direction away from the second base body 1231. In this way, both the second air inlet 31 and the second air outlet 32 face the battery module 20, which can guide the cold air flow to flow more evenly through each part of the battery module 20. This helps to reduce the temperature gradient inside the battery module 20, ensure that each battery cell can be fully cooled, and thus improve the overall temperature uniformity of the battery pack. In addition, since both the second air inlet 31 and the second air outlet 32 face the battery module 20, the cold air flow discharged from the second air outlet 32 can quickly blow towards the battery module 20, and the hot air flow on the periphery of the battery module 20 can quickly enter the second air inlet 31, thereby improving the heat dissipation efficiency of the battery module 20.

[0072] It should be noted that the present application does not limit the sizes and shapes of the second air inlet 31 and the second air outlet 32. The sizes and shapes of the second air inlet 31 and the second air outlet 32 can be adjusted according to different requirements. For example, in a system that requires large-flow heat exchange, the sizes of the air inlet and the air outlet can be increased. For example, for the convenience of processing, the second air inlet 31 and the second air outlet 32 can be set as round holes.

[0073] In one embodiment, the housing assembly 10 further includes a heat dissipation structure, which is installed on the outer wall surface of the housing 1 and is used for heat exchange with the gas in the first air duct 2 and / or the second air duct 3. In this way, by installing the heat dissipation structure on the outer wall surface of the housing 1, it helps to quickly reduce the temperature of the hot air flow in the first air duct 2 and the second air duct 3.

[0074] It should be noted that there are various types of heat dissipation structures. For example, in one embodiment, the heat dissipation structure may include a heat dissipation fan. By installing the heat dissipation fan on the outer wall surface of the housing 1, it is realized that the heat dissipation fan promotes the air flow outside the housing 1 to exchange heat with the housing 1, so as to cool down the housing 1. The cooled housing 1 can continue to exchange heat with the hot air flow in the first air duct 2. In another embodiment, the heat dissipation structure may further include a liquid cooling plate, which is attached to the outer wall surface of the housing 1 and exchanges heat with the housing 1 to cool down the housing 1. The cooled housing 1 can continue to exchange heat with the hot air flow in the first air duct 2. In other embodiments, the heat dissipation structure may further include a thermoelectric cooler. The cold end of the thermoelectric cooler is in contact with the outer wall surface of the housing 1 and exchanges heat with the housing 1 to cool down the housing 1. The cooled housing 1 can continue to exchange heat with the hot air flow in the first air duct 2. The type of the heat dissipation structure can be selected according to needs, and the present application does not limit this.

[0075] Refer to Figure 1 and Figure 2In one embodiment, the outer wall surface of the housing 1 includes a first outer wall surface 151 and a second outer wall surface 152, the first outer wall surface 151 corresponds to the first air duct 2, and the second outer wall surface 152 corresponds to the second air duct 3. The heat dissipation structure includes a plurality of first heat dissipation fins 61, and the plurality of first heat dissipation fins 61 are arranged on the first outer wall surface 151 and / or the second outer wall surface 152, and the plurality of first heat dissipation fins 61 are arranged at intervals. In this way, by arranging a plurality of first heat dissipation fins 61 on the outer wall surface of the housing 1 and arranging them at intervals, the heat dissipation area of ​​the housing 1 can be significantly increased. The increase in the heat dissipation area means that more heat can be dissipated to the surrounding environment through the outer surface of the housing 1, thereby improving the heat dissipation efficiency. The first outer wall surface 151 corresponds to the first air duct 2, and the second outer wall surface 152 corresponds to the second air duct 3. This layout enables the first heat dissipation fins 61 to directly face the hot air flow in the first air duct 2 and the second air duct 3, which is conducive to the heat exchange between the hot air flow and the first heat dissipation fins 61, and further improves the heat dissipation effect. The spaced arrangement of the first heat dissipation fins 61 not only helps to dissipate heat, but also disperses the stress on the shell 1 to a certain extent. When the shell 1 is subjected to thermal stress caused by external impact or internal temperature changes, the spaced fins can provide additional support and buffering effects, thereby enhancing the structural strength and stability of the shell 1. The intervals between the first heat dissipation fins 61 provide a channel for airflow, so that the airflow outside the shell 1 can flow smoothly through the surface of the first heat dissipation fins 61, taking away more heat. At the same time, this design also helps to reduce the resistance of airflow and improve heat dissipation efficiency. The spaced arrangement of the first heat dissipation fins 61 makes it easier to disassemble and replace a single fin. When a fin is damaged or needs to be replaced, it can be operated separately without affecting the normal operation of other fins. In addition, this design is also helpful for subsequent upgrades and improvements to the heat dissipation structure.

[0076] It should be noted that the present application does not limit the number, size, spacing and other parameters of the first heat dissipation fins 61. The number, size, spacing and other parameters of the first heat dissipation fins 61 can be flexibly adapted to different heat dissipation requirements. For example, the number of fins can be increased and the spacing can be reduced in areas with greater heat dissipation requirements; the number of fins can be reduced or the spacing can be increased in areas with less heat dissipation requirements.

[0077] Reference Figure 1The outer wall surface of the housing 1 includes a third outer wall surface 153 and a fourth outer wall surface 154. The first outer wall surface 151, the second outer wall surface 152, the third outer wall surface 153 and the fourth outer wall surface 154 have different orientations. The third outer wall surface 153 and the fourth outer wall surface 154 can also be provided with a plurality of second heat dissipation fins 9, and the plurality of second heat dissipation fins 9 are arranged at intervals. In this way, by arranging the second heat dissipation fins 9 on the third outer wall surface 153 and the fourth outer wall surface 154, the total heat dissipation area of ​​the housing 1 is significantly increased. As an extended surface for heat exchange, the second heat dissipation fins 9 can more effectively exchange heat with the surrounding airflow, thereby accelerating the dissipation of heat. The interval arrangement between the second heat dissipation fins 9 helps to form an airflow flow channel, so that the airflow can flow smoothly through the fin surface and take away more heat. This design improves the uniformity and efficiency of the airflow and further enhances the heat dissipation effect.

[0078] Reference Figure 5 In one embodiment, the housing 1 includes a bottom plate 13 and a top plate 14, and a plurality of heat dissipation ducts 7 are arranged inside the bottom plate 13 and / or the top plate 14, and each heat dissipation duct 7 is arranged along the length direction of the corresponding bottom plate 13 or the top plate 14. In this way, by arranging the heat dissipation duct 7 through the bottom plate 13 and / or the top plate 14, the cold air flow outside the housing 1 can enter the heat dissipation duct 7 and exchange heat with the bottom plate 13 and the top plate 14, thereby reducing the temperature of the bottom plate 13 and the top plate 14. The cooled bottom plate 13 and the top plate 14 can exchange heat with the hot air flow in the installation cavity 11, thereby cooling the hot air flow in the housing 1, thereby ensuring that the battery module 20 in the housing 1 can work normally. By arranging the heat dissipation duct 7 through the bottom plate 13 and / or the top plate 14, the internal space of the housing 1 is fully utilized, and there is no need to add additional heat dissipation elements on the outside. This helps to reduce the overall size of the housing 1 and improve space utilization. The integrated design of the heat dissipation duct 7, the bottom plate 13 and the top plate 14 makes the structure of the entire housing 1 more compact.

[0079] Reference Figure 2 and Figure 3 In one embodiment, the inner bottom wall of the shell 1 is provided with a plurality of wind guide grooves 8 which are all connected to the installation cavity 11. Each wind guide groove 8 is extended in the direction from the first air inlet 21 to the second air outlet 32. Both ends of the wind guide groove 8 extend to the side wall 12. By providing the wind guide groove 8, a smoother channel can be provided for the airflow near the inner bottom wall of the shell 1, reducing the resistance of the airflow when flowing inside the shell 1, thereby reducing wind noise and improving the heat dissipation effect. The provision of the wind guide groove 8 increases the heat dissipation area inside the shell 1, so that more heat can be dissipated to the surrounding environment through the surface of the shell 1. The wind guide groove 8 helps to guide the hot air flow in the installation cavity 11 to the surface of the shell 1, and exchange heat with the external cold air flow, thereby accelerating the heat dissipation process. In addition, the provision of the wind guide groove 8 also facilitates the heat dissipation at the bottom of the battery module 20.

[0080] Continue to refer to Figure 2 and Figure 3 In the embodiment of the present application, a plurality of bosses 81 are convexly provided on the inner bottom wall 16 of the housing 1. The plurality of bosses 81 extend along the direction from the first air inlet 21 to the second air outlet 32. Both ends of each boss 81 extend to the side wall 12. The plurality of bosses 81 are spaced along the direction from the first air inlet 21 to the first air outlet 22. A wind guiding groove 8 is formed between two adjacent bosses 81. In this way, while improving the heat dissipation efficiency, the arrangement of the bosses 81 is equivalent to a reinforcing rib, which improves the strength of the bottom of the housing 1 to a certain extent.

[0081] It should be noted that in other embodiments, the wind guiding groove 8 may also be concavely formed on the inner bottom wall 16 of the housing 1. Specifically, the present application does not limit the specific formation manner of the wind guiding groove 8.

[0082] Refer to Figures 5 to 9 In the embodiment of the present utility model, a battery pack 100 is further proposed. The battery pack 100 includes the housing assembly 10 as described above. The specific structure of the housing assembly 10 refers to the above embodiment. Since the battery pack 100 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0083] In one embodiment, the battery pack 100 further includes a battery module 20. The battery module 20 is installed in the installation cavity 11 and is located between the first air duct 2 and the second air duct 3. In this way, it can be ensured that the cold air flow can directly flow through the surface of the battery module 20, effectively taking away the heat generated by the module. This direct heat dissipation method significantly improves the heat dissipation efficiency and helps to keep the battery module 20 within a suitable working temperature range. The design of the first air duct 2 and the second air duct 3 helps to achieve uniform temperature distribution in the installation cavity 11. When the cold air flow is discharged from the first air outlet 22 and the second air outlet 32 and flows through the battery module 20, it can take away the heat on the surface of the module. The cold air flow is heated to a hot air flow and enters the first air duct 2 and the second air duct 3 through the first air inlet 21 and the second air inlet 31, thereby avoiding local overheating of the battery module 20. This helps to maintain the temperature consistency of each part of the battery module 20 and improves the overall performance and service life of the battery pack 100.

[0084] The embodiments of the present utility model have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A housing assembly, characterized in that: include: A housing is formed with an installation cavity, the installation cavity is used for installing a battery module, the housing includes a side wall surrounding the installation cavity, a first air duct and a second air duct are formed in the side wall, the side wall includes a plurality of side panels connected in sequence, the first air duct and the second air duct are at least partially located on side panels facing different directions, the first air duct has a first air inlet and a first air outlet connected to the installation cavity, and the second air duct has a second air inlet and a second air outlet connected to the installation cavity; a first fan, installed in the first air duct, for promoting the flow of gas in the first air duct; The second fan is installed in the second air duct to promote the flow of gas in the second air duct.

2. The housing assembly according to claim 1, characterized in that: The first air duct and the second air duct are both extended along the circumference of the side wall.

3. The housing assembly according to claim 2, characterized in that: The first air inlet is arranged opposite to the second air outlet, and the first air outlet is arranged opposite to the second air inlet.

4. The housing assembly according to claim 3, characterized in that: The first air duct and the second air duct are arranged adjacent to the top of the housing.

5. The housing assembly according to claim 1, characterized in that: The first fan is disposed adjacent to the first air outlet; and / or, The second fan is disposed adjacent to the second air outlet.

6. The housing assembly according to any one of claims 1 to 5, characterized in that: The plurality of side panels include a first side panel and a second side panel that are arranged opposite to each other, the first side panel includes a first base and a first cover, the first cover is arranged on a side of the first base facing the installation cavity, the first cover is covered on the first base, so that a first air duct is enclosed between the first cover and the first base, and the second side panel includes a second base and a second cover, the second cover is arranged on a side of the second base facing the installation cavity, the second cover is covered on the second base, so that a second air duct is enclosed between the second cover and the second base; and / or, The shell assembly further includes a heat dissipation structure, which is mounted on an outer wall surface of the shell and is used for exchanging heat with the gas in the first air duct and / or the second air duct.

7. The housing assembly according to claim 6, characterized in that: The first cover body has a first cover plate arranged opposite to the first base, and the first air inlet and the first air outlet are penetrated by the first cover plate in a direction away from the first base; and / or, The second cover body has a second cover plate arranged opposite to the second base body, and the second air inlet and the second air outlet are penetrated by the second cover plate in a direction away from the second base body; and / or, The outer wall surface of the shell includes a first outer wall surface and a second outer wall surface, the first outer wall surface corresponds to the first air duct, and the second outer wall surface corresponds to the second air duct. The heat dissipation structure includes a plurality of first heat dissipation fins, and the plurality of first heat dissipation fins are respectively arranged on the first outer wall surface and / or the second outer wall surface, and the plurality of first heat dissipation fins are arranged at intervals.

8. The housing assembly according to any one of claims 1 to 5, characterized in that: The housing comprises a bottom plate and a top plate, wherein the bottom plate and / or the top plate are provided with a plurality of heat dissipation ducts, and each of the heat dissipation ducts is arranged along the length direction of the corresponding bottom plate or the top plate; and / or, The inner bottom wall of the shell is provided with a plurality of air guide grooves which are all connected with the installation cavity, each of the air guide grooves is extended from the first air inlet to the second air outlet, and both ends of the air guide grooves extend to the side walls.

9. A battery pack, characterized in that: Comprising the housing assembly according to any one of claims 1 to 8.

10. The battery pack according to claim 9, characterized in that: It also includes a battery module, which is installed in the installation cavity and between the first air duct and the second air duct.

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