Heat dissipation structure and battery box with same

Abstract

The utility model provides a heat dissipation structure and a battery box with the heat dissipation structure, and the heat dissipation structure comprises two oppositely arranged heat dissipation layers, the multiple heat insulation parts are arranged between the two heat dissipation layers, each heat insulation part is in a strip shape, and the multiple heat insulation parts are distributed at intervals in the preset direction; a heat dissipation air channel is defined by every two adjacent heat insulation parts and the two heat dissipation layers. Each heat dissipation layer is of a hollowed-out structure, so that the heat dissipation layers are communicated with the heat dissipation air channel through holes of the hollowed-out structures. The heat dissipation structure is used for being clamped between two adjacent battery cells, and each heat dissipation layer is used for being attached to the two adjacent battery cells in a one-to-one correspondence mode.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery modules, and in particular to a heat dissipation structure and a battery box having the same. Background Art

[0002] At present, with the widespread application of batteries, battery safety performance has also received much attention, especially the problem of battery thermal runaway. When a battery experiences thermal runaway, it may cause power outages at the very least, or even fires at the worst, endangering people's lives and property safety. Therefore, it is necessary to improve the heat dissipation efficiency of the battery.

[0003] In the prior art, when designing a battery, air duct plates are usually provided between the battery cells to cool the battery cells.

[0004] However, in actual applications, the air duct splint is mainly designed by casting an integral part. In order to prevent the heat from spreading in the thermal runaway state of the battery cell, insulation material is also filled between the battery cell and the air duct splint. However, under normal working conditions, the battery cell is easily unable to dissipate heat to the outside due to the insulation material, thereby reducing the heat dissipation efficiency of the battery. Utility Model Content

[0005] The main purpose of the utility model is to provide a heat dissipation structure and a battery box having the same, so as to solve the problem of low heat dissipation performance of the battery module in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a heat dissipation structure is provided, including: two oppositely arranged heat dissipation layers; multiple heat insulation parts, multiple heat insulation parts are arranged between the two heat dissipation layers, each heat insulation part is strip-shaped, and multiple heat insulation parts are spaced apart along a preset direction; a heat dissipation duct is formed between two adjacent heat insulation parts and the two heat dissipation layers; wherein each heat dissipation layer is a hollow structure, so that the heat dissipation layer is connected to the heat dissipation duct through the holes of the hollow structure; the heat dissipation structure is used to be clamped between two adjacent battery cells, and each heat dissipation layer is used to fit one-to-one with the two adjacent battery cells.

[0007] Furthermore, the heat dissipation layer is foam copper.

[0008] Furthermore, the heat dissipation layer is plate-shaped, and the plurality of heat insulation parts are arranged at intervals along the length direction or the width direction of the heat dissipation layer.

[0009] Furthermore, an adhesive layer is provided on one side of the plurality of heat insulating parts close to the heat dissipation layer, and the plurality of heat insulating parts are bonded to the heat dissipation layer through the adhesive layer.

[0010] Furthermore, the heat insulating portion is a rectangular strip, and the width W of each heat insulating portion along a preset direction has a value range of: 2mm≤W≤6mm.

[0011] Furthermore, the heat dissipation layer is plate-shaped, and the thickness T of the heat dissipation layer has a value range of: 2 mm ≤ T ≤ 10 mm.

[0012] According to another aspect of the present invention, a battery box is provided, including a battery module and a first heat dissipation structure. The first heat dissipation structure is the above-mentioned heat dissipation structure. The battery module includes a battery cell. There are multiple battery cells, and the multiple battery cells are arranged side by side. A heat dissipation structure is provided between each adjacent battery cell.

[0013] Furthermore, the battery box also includes: a bottom shell; a fan, arranged on the bottom shell; a supporting structure, arranged on the bottom shell, the supporting structure having heat dissipation holes, the supporting structure being located on the side of the fan away from the bottom shell, and the battery module being arranged on the side of the supporting structure away from the fan; a cover body, arranged on the outside of the battery module, and the bottom of the cover body being connected to the bottom shell; wherein a second heat dissipation structure is provided at one end of the battery cell close to the supporting structure.

[0014] Furthermore, the second heat dissipation structure is plate-shaped, the length of the second heat dissipation structure is consistent with the length of the battery cell, the width of the second heat dissipation structure is consistent with the width of the battery cell, there are multiple second heat dissipation structures, and the multiple second heat dissipation structures are arranged in a one-to-one correspondence with the battery cells, and each second heat dissipation structure is arranged on one side of the corresponding battery cell; the bottom shell is plate-shaped, and there are multiple fans, and the multiple fans are arranged at intervals along the length direction or width direction of the bottom shell.

[0015] Furthermore, the second heat dissipation structure is plate-shaped and is integrally formed. The length of the second heat dissipation structure is consistent with the length of the battery module, and the width of the second heat dissipation structure is consistent with the width of the battery module.

[0016] According to the technical solution of the present invention, a heat dissipation structure includes two oppositely disposed heat dissipation layers and multiple heat insulation portions. The multiple heat insulation portions are disposed between the two heat dissipation layers, each heat insulation portion being strip-shaped and spaced apart along a predetermined direction. A heat dissipation duct is formed between two adjacent heat insulation portions and the two heat dissipation layers. Each heat dissipation layer is a hollow structure, allowing the heat dissipation layer to communicate with the heat dissipation duct through the holes in the hollow structure. The heat dissipation structure is configured to be sandwiched between two adjacent battery cells, with each heat dissipation layer being configured to correspond to each of the two adjacent battery cells. Thus, the above arrangement, on the one hand, absorbs heat dissipated by the battery cells through the heat dissipation layers and dissipates it through the heat dissipation duct, thereby reducing the temperature of the battery cells, improving the heat dissipation performance of the battery cells, and enhancing the operational stability of the battery cells. On the other hand, the heat insulation portions provide thermal insulation for the battery cells, preventing heat from spreading during thermal runaway, improving the safety of the battery cells, and thereby enhancing the versatility of the heat dissipation structure. Furthermore, the heat dissipation efficiency of the battery cells is reduced due to filling with insulation material, further improving the heat dissipation performance of the battery cells. At the same time, the hollow structure is set up in a way that realizes the connection area between the heat dissipation layer and the heat dissipation air duct, increases the contact area between the battery cell and the air, further improves the heat dissipation performance and heat dissipation efficiency of the battery module, and thus solves the problem of low heat dissipation performance of the battery module in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 Shows a perspective view of the overall structure of an embodiment of the heat dissipation structure according to the present utility model;

[0019] Figure 2 Shows a side view of the overall structure of an embodiment of the heat dissipation structure according to the present utility model;

[0020] Figure 3 A partial structural schematic diagram of an embodiment of a heat dissipation structure according to the present utility model is shown;

[0021] Figure 4 An exploded view of the overall structure of a battery box according to an embodiment of the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. Heat dissipation layer; 20. Heat insulation portion; 21. Heat dissipation duct;

[0024] 1. Battery module; 101. Battery cell;

[0025] 2. Bottom shell; 201. Partition plate; 202. First bottom shell; 203. Second bottom shell;

[0026] 3. Fan; 4. Bearing structure; 5. Cover; 6. Second heat dissipation structure. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0030] In order to solve the problem of low heat dissipation performance of battery modules in the prior art, the present application provides a heat dissipation structure and a battery box having the same.

[0031] like Figure 1 and Figure 3 As shown, the heat dissipation structure includes two opposing heat dissipation layers 10 and multiple thermal insulation portions 20. The multiple thermal insulation portions 20 are disposed between the two heat dissipation layers 10, each in a strip shape, and are spaced apart along a predetermined direction. A heat dissipation duct 21 is formed between two adjacent heat dissipation portions 20 and the two heat dissipation layers 10. Each heat dissipation layer 10 is a hollow structure, allowing the heat dissipation layer 10 to communicate with the heat dissipation duct 21 through the holes in the hollow structure. The heat dissipation structure is intended to be sandwiched between two adjacent battery cells 101, with each heat dissipation layer 10 being adapted to fit one-to-one with the two adjacent battery cells 101.

[0032] Applying the technical solution of this embodiment, the heat dissipation structure includes two oppositely arranged heat dissipation layers 10 and a plurality of heat insulation parts 20. The plurality of heat insulation parts 20 are arranged between the two heat dissipation layers 10, each heat insulation part 20 is strip-shaped, and the plurality of heat insulation parts 20 are spaced apart along a preset direction. A heat dissipation duct 21 is formed between two adjacent heat insulation parts 20 and the two heat dissipation layers 10. Among them, each heat dissipation layer 10 is a hollow structure, so that the heat dissipation layer 10 is connected to the heat dissipation duct 21 through the holes of the hollow structure. The heat dissipation structure is used to be sandwiched between two adjacent battery cells 101, and each heat dissipation layer 10 is used to fit one-to-one with two adjacent battery cells 101. In this way, the above arrangement, on the one hand, absorbs the heat emitted by the battery cell 101 through the heat dissipation layer 10, and dissipates the heat from the battery cell 101 through the heat dissipation duct 21, thereby reducing the temperature of the battery cell 101, improving the heat dissipation performance of the battery cell 101, and improving the operating stability of the battery cell 101; on the other hand, the heat insulation portion 20 achieves heat insulation for the battery cell 101, preventing the spread of heat from the battery cell 101 in a thermal runaway state, improving the safety of the battery cell 101, thereby improving the versatility of the heat dissipation structure, and avoiding the reduction of the heat dissipation efficiency of the battery cell 101 due to filling with insulation materials, further improving the heat dissipation performance of the battery cell 101. At the same time, the hollow structure setting method realizes the connection area between the heat dissipation layer 10 and the heat dissipation duct 21, increases the contact area between the battery cell 101 and the air, further improves the heat dissipation performance and heat dissipation efficiency of the battery module 1, and thus solves the problem of low heat dissipation performance of the battery module 1 in the prior art.

[0033] In this embodiment, the battery cell 101 is a square battery.

[0034] In this embodiment, the heat insulating portion 20 is a silicone foam strip. This configuration not only prevents the heat from spreading during thermal runaway of the battery cells 101, thereby improving the safety of the battery cells 101, but also cushions the expansion of the battery cells 101, preventing the expansion of the battery cells 101 from increasing the pressure between adjacent battery cells 101, thereby extending the service life of the battery cells 101.

[0035] In this embodiment, an adhesive layer is provided on one side of the plurality of thermal insulation portions 20 close to the heat dissipation layer 10, and the plurality of thermal insulation portions 20 are bonded to the heat dissipation layer 10 via the adhesive layer. This arrangement simplifies and facilitates the connection between the plurality of thermal insulation portions 20 and the heat dissipation layer 10, reduces operational difficulty for the operator, and improves work efficiency.

[0036] In this embodiment, the adhesive layer is glue.

[0037] Specifically, the heat dissipation layer 10 is made of foamed metal. This configuration improves the thermal conductivity of the heat dissipation layer 10, thereby increasing the efficiency of the heat dissipation layer 10 in absorbing heat, and thereby improving the heat dissipation efficiency of the battery cell 101. It also reduces the manufacturing cost of the heat dissipation layer 10, thereby reducing the cost of the heat dissipation structure and improving the economic efficiency of the heat dissipation structure.

[0038] Specifically, the heat dissipation layer 10 is foam copper.

[0039] like Figure 1 As shown, the heat dissipation layer 10 is plate-shaped, with multiple insulation sections 20 spaced apart along the length or width of the heat dissipation layer 10. This arrangement simplifies the formation of the heat dissipation layer 10, making it easier to process and implement, thereby reducing the complexity of the process. Furthermore, the arrangement of the insulation sections 20 not only improves the thermal insulation efficiency of the heat dissipation structure, thereby enhancing the safety of the battery cells 101, but also allows for more flexible and diverse configurations, increasing flexibility in fabrication.

[0040] In this embodiment, the number of the heat insulating parts 20 is eleven.

[0041] It should be noted that the number of the heat insulating parts 20 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the heat insulating parts 20 is two, three, five, six, nine, twelve, or more.

[0042] like Figure 2 As shown, the heat insulating portion 20 is a rectangular strip, and the width W of each heat insulating portion 20 along a predetermined direction is within the range of 2mm≤W≤6mm. This arrangement allows the heat dissipation structure to prevent the spread of heat in the battery cell 101 during thermal runaway while also dissipating heat from the battery cell 101. This enhances the versatility of the heat dissipation structure and, in turn, improves the safety and operational stability of the battery cell 101.

[0043] In this embodiment, the width W of the heat insulating portion 20 along the preset direction is 4 mm, to ensure that the width W of the heat insulating portion 20 along the preset direction is the most appropriate, and also to reduce the processing difficulty of the staff.

[0044] like Figure 2 As shown, the heat dissipation layer 10 is plate-shaped, and the thickness T of the heat dissipation layer 10 is in the range of 2 mm ≤ T ≤ 10 mm. This configuration allows the heat dissipation layer 10 to absorb heat from the battery cells 101 while also ensuring sufficient space for the battery cells 101. This avoids adding a heat dissipation layer 10 that would increase the installation space for the battery cells 101 and reduce the number of battery cells 101, thereby reducing processing costs and improving the economic efficiency of the battery cell 101 installation.

[0045] In this embodiment, the thickness T of the heat dissipation layer 10 is set to 2 mm, so as to ensure that the thickness T of the heat dissipation layer 10 is the most appropriate, thereby further reducing the production cost.

[0046] Specifically, the holes of the hollow structure can be circular holes or polygonal holes, and the flow area of ​​the holes ranges from 3.14 mm to 4.3 mm. 2 ≤S≤78.5mm 2 Thus, the above arrangement ensures the contact area between the battery cell 101 and the air, ensures the fluidity of the air, and thus improves the heat dissipation efficiency of the battery cell 101; on the other hand, it makes the arrangement of the hollow structure more flexible and diverse, and improves the processing flexibility of the staff.

[0047] The present application also provides a battery box including a battery module 1 and a first heat dissipation structure. The first heat dissipation structure is the heat dissipation structure described above. The battery module 1 includes multiple battery cells 101, which are arranged side by side. A heat dissipation structure is provided between each adjacent battery cell 101. Thus, the above arrangement improves the heat dissipation performance of the battery module 1, further improving the heat dissipation performance of the battery box.

[0048] like Figure 4 As shown, the battery box also includes a bottom shell 2, a fan 3, a supporting structure 4, a cover 5, and a second heat dissipation structure 6. The fan 3 is mounted on the bottom shell. The supporting structure 4 is also mounted on the bottom shell and has heat dissipation holes. The supporting structure 4 is located on the side of the supporting structure 4 away from the fan 3, and the battery module 1 is mounted on the side of the supporting structure 4 away from the fan 3. The cover 5 is mounted outside the battery module 1, with its bottom connected to the bottom shell. The second heat dissipation structure 6 is located on the end of the battery cell 101 closest to the supporting structure 4. This arrangement of the fan 3 improves air flow and enhances the heat dissipation efficiency of the battery box. Furthermore, the arrangement of the supporting structure 4 not only supports the battery module 1, ensuring its installation stability, but also separates the battery module 1 from the fan 3, preventing interference between the two operating modes and thus improving the operational stability of the battery box. Furthermore, the arrangement of the heat dissipation holes enables the fan 3 to dissipate heat from the battery module 1, further improving its heat dissipation efficiency. At the same time, the configuration of the cover 5 reduces the contact area between the battery module 1, fan 3, support structure 4, and second heat dissipation structure 6 and the outside world, preventing damage to the battery module 1, fan 3, support structure 4, and second heat dissipation structure 6 by external impurities, thereby extending the service life of the battery module 1, fan 3, support structure 4, and second heat dissipation structure 6. Furthermore, the configuration of the second heat dissipation structure 6 dissipates heat from the bottom of the battery cell 101, further improving the heat dissipation performance of the battery cell 101 and ensuring the operational stability of the battery cell 101.

[0049] In this embodiment, the cover 5 is provided with strip-shaped through holes to ensure air circulation, thereby improving the heat dissipation performance of the battery box.

[0050] Specifically, the second heat dissipation structure 6 is foam copper.

[0051] like Figure 4 As shown, the second heat dissipation structure 6 is plate-shaped, with the length and width of the battery cell 101 being consistent. There are multiple second heat dissipation structures 6, each corresponding to a battery cell 101, and each second heat dissipation structure 6 is positioned on one side of a corresponding battery cell 101. The bottom shell 2 is plate-shaped, and there are multiple fans 3, spaced apart along the length or width of the bottom shell 2. This arrangement not only ensures the heat dissipation performance of the battery cell 101 near the supporting structure 4, further improving the heat dissipation performance of the battery cell 101, but also reduces the production cost of the second heat dissipation structure 6, improving its economic performance. Furthermore, the arrangement of multiple fans 3 further improves the heat dissipation efficiency of the battery cell 101.

[0052] Specifically, there are ten fans 3 provided, which are arranged at intervals along the length direction or the width direction of the bottom shell 2 .

[0053] It should be noted that the number of fans 3 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, there are two, three, five, six, nine, twelve, or more fans 3.

[0054] In this embodiment, the bottom shell 2 is provided with a partition plate 201 to separate the bottom shell 2 into a first bottom shell 202 and a second bottom shell 203. The first bottom shell 202 and the second bottom shell 203 are both rectangular. Five fans 3 are provided on the first bottom shell 202, spaced apart along its length. Five fans 3 are provided on the second bottom shell 203, spaced apart along its length.

[0055] Optionally, the second heat dissipation structure 6 is plate-shaped and integrally formed, with the length of the second heat dissipation structure 6 being consistent with the length of the battery module, and the width of the second heat dissipation structure 6 being consistent with the width of the battery module. This arrangement simplifies the formation of the second heat dissipation structure 6 and makes it easier to process and implement, thereby reducing the processing difficulty for the staff, improving the staff's work efficiency, and thus improving production efficiency.

[0056] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0057] The heat dissipation structure includes two opposing heat dissipation layers and multiple thermal insulation portions. The multiple thermal insulation portions are disposed between the two heat dissipation layers, each of which is strip-shaped and spaced apart along a predetermined direction. A heat dissipation duct is formed between two adjacent heat insulation portions and the two heat dissipation layers. Each heat dissipation layer is a hollow structure, allowing the heat dissipation layer to communicate with the heat dissipation duct through the holes in the hollow structure. The heat dissipation structure is intended to be sandwiched between two adjacent battery cells, with each heat dissipation layer being adapted to fit one-to-one with the two adjacent battery cells. Thus, the above arrangement, on the one hand, absorbs heat dissipated by the battery cells through the heat dissipation layers and dissipates it through the heat dissipation duct, thereby reducing the temperature of the battery cells, improving the heat dissipation performance of the battery cells, and enhancing the operational stability of the battery cells. On the other hand, the thermal insulation portions provide thermal insulation for the battery cells, preventing heat from spreading during thermal runaway, improving the safety of the battery cells, and thereby enhancing the versatility of the heat dissipation structure. This also avoids the reduction in heat dissipation efficiency of the battery cells caused by filling with thermal insulation material, further improving the heat dissipation performance of the battery cells. At the same time, the hollow structure is set up in a way that realizes the connection area between the heat dissipation layer and the heat dissipation air duct, increases the contact area between the battery cell and the air, further improves the heat dissipation performance and heat dissipation efficiency of the battery module, and thus solves the problem of low heat dissipation performance of the battery module in the existing technology.

[0058] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0060] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat dissipation structure, characterized in that: The heat dissipation structure includes: Two heat dissipation layers (10) arranged opposite to each other; a plurality of heat insulating portions (20), the plurality of heat insulating portions (20) being arranged between two heat dissipation layers (10), each heat insulating portion (20) being strip-shaped, and the plurality of heat insulating portions (20) being spaced and distributed along a preset direction; a heat dissipation duct (21) being formed between two adjacent heat insulating portions (20) and the two heat dissipation layers (10); Each of the heat dissipation layers (10) is a hollow structure, so that the heat dissipation layer (10) is connected to the heat dissipation duct (21) through the holes of the hollow structure; The heat dissipation structure is used to be sandwiched between two adjacent battery cells (101), and each heat dissipation layer (10) is used to be fitted with the two adjacent battery cells (101) in a one-to-one correspondence.

2. The heat dissipation structure according to claim 1, characterized in that: The heat dissipation layer (10) is foam metal.

3. The heat dissipation structure according to claim 1, characterized in that: The heat dissipation layer (10) is plate-shaped, and the plurality of heat insulation parts (20) are distributed at intervals along the length direction or width direction of the heat dissipation layer (10).

4. The heat dissipation structure according to claim 1, characterized in that: An adhesive layer is provided on one side of the plurality of heat insulating parts (20) close to the heat dissipation layer (10), and the plurality of heat insulating parts (20) are bonded to the heat dissipation layer (10) via the adhesive layer.

5. The heat dissipation structure according to claim 1, characterized in that: The heat insulating portion (20) is a rectangular strip, and the width W of each heat insulating portion (20) along the preset direction has a value range of: 2 mm ≤ W ≤ 6 mm.

6. The heat dissipation structure according to claim 1, characterized in that: The heat dissipation layer (10) is plate-shaped, and the thickness T of the heat dissipation layer (10) is in the range of 2 mm ≤ T ≤ 10 mm.

7. A battery box, characterized in that: It comprises a battery module (1) and a first heat dissipation structure, wherein the first heat dissipation structure is the heat dissipation structure according to any one of claims 1 to 6, The battery module (1) comprises a plurality of battery cells (101), the plurality of battery cells (101) are arranged side by side, and the heat dissipation structure is provided between two adjacent battery cells (101).

8. The battery box according to claim 7, characterized in that: The battery box also includes: bottom shell (2); A fan (3) is arranged on the bottom shell (2); A bearing structure (4) is arranged on the bottom shell (2), the bearing structure (4) having heat dissipation holes, the bearing structure (4) being located on a side of the fan (3) away from the bottom shell (2), and the battery module (1) being arranged on a side of the bearing structure (4) away from the fan (3); A cover body (5) is provided on the outside of the battery module (1), and the bottom of the cover body (5) is connected to the bottom shell (2); Wherein, a second heat dissipation structure (6) is provided at one end of the battery core (101) close to the supporting structure (4).

9. The battery box according to claim 8, characterized in that: The second heat dissipation structure (6) is in a plate shape, The length of the second heat dissipation structure (6) is consistent with the length of the battery core (101), the width of the second heat dissipation structure (6) is consistent with the width of the battery core (101), there are multiple second heat dissipation structures (6), the multiple second heat dissipation structures (6) are arranged in a one-to-one correspondence with the multiple battery cores (101), and each second heat dissipation structure (6) is arranged on one side of the corresponding battery core (101); The bottom shell (2) is plate-shaped, and there are a plurality of fans (3), which are arranged at intervals along the length direction or width direction of the bottom shell (2).

10. The battery box according to claim 8, characterized in that: The second heat dissipation structure (6) is plate-shaped and is integrally formed. The length of the second heat dissipation structure (6) is consistent with the length of the battery module (1), the width of the second heat dissipation structure (6) is consistent with the width of the battery module (1), and the second heat dissipation structure (6) is arranged on one side of the battery module (1).

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