Double-layer inclined rib harmonica-shaped tube heat dissipation plate and battery pack

Abstract

The utility model provides a double-layer diagonal rib harmonica-shaped tube heat dissipation plate and battery pack, wherein the heat dissipation plate comprises a plate body, a partition plate, diagonal ribs and a convex structure, the plate body forms a flow channel cavity through two parallel and connected heat exchange plates, the partition plate is arranged in the flow channel cavity and parallel to the heat exchange plates to divide the flow channel cavity into two layers, and the convex structure is arranged on the partition plate. The inclined ribs are distributed in the double-layer flow channel cavity and divide the double-layer flow channel cavity into a plurality of flow channels, the expansion tolerance of the battery cell is absorbed through elastic deformation of the double-layer inclined ribs, shearing dislocation is avoided, and meanwhile heat transfer is blocked during single-side thermal runaway; the protruding structures are distributed on the inner surface of the flow channel cavity to provide support and guarantee circulation of heat exchange media, the inclined ribs are matched with the protrusions to improve heat exchange efficiency, the protruding structures are arranged to guarantee even distribution of battery temperature, the problems of gaps and cracks of a heat dissipation interface are solved through the heat dissipation plate structure, and the heat dissipation efficiency is improved. And the durability, the pressure resistance and the thermal safety of the battery pack are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal management technology, specifically to a double-layer ribbed harmonica tube heat sink and a battery pack. Background Technology

[0002] With the rapid development of new energy vehicles, the performance and lifespan of the power battery, as its core component, directly affect the performance and safety of the entire vehicle. Batteries generate a large amount of heat during operation; if this heat cannot be dissipated in time, the battery temperature will rise, affecting battery performance and lifespan, and even causing safety issues.

[0003] Existing battery cooling solutions are divided into bottom cooling and side cooling. Bottom cooling is a relatively mature solution. Side cooling is more difficult to design and manufacture. The main challenge is that the battery expands during operation. Traditional side cooling heat sinks have a rigid structure, which is difficult to absorb the tolerance of cell expansion, and is prone to deformation. During the expansion and contraction of the battery, gaps are generated, which affect the heat transfer effect and may even damage the battery. On the other hand, the inclined rib cold plate with tolerance absorption will be misaligned in the vertical direction when it collapses, generating shear force in the heat transfer section, resulting in interface cracks and affecting the heat exchange effect. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a double-layer oblique rib harmonica tube heat dissipation plate and battery pack, which can solve the problems of misalignment and interface gap caused by the battery heat dissipation side plate absorbing the expansion tolerance of the cell, effectively improve heat exchange efficiency and structural durability, and enhance battery safety performance.

[0005] To achieve the above and other related objectives, this utility model provides a double-layer oblique-ribbed harmonica tube heat dissipation plate, comprising:

[0006] The plate body includes two parallel heat exchange plates, the two ends of which are connected by side plates to form a flow channel cavity;

[0007] A baffle is disposed in the flow channel cavity, and the baffle is arranged parallel to the heat exchange plate to divide the flow channel cavity into a first flow channel cavity and a second flow channel cavity.

[0008] Inclined ribs are disposed in the first flow channel cavity and the second flow channel cavity, and are symmetrically arranged on both sides of the partition. The inclined ribs divide the first flow channel cavity and the second flow channel cavity into multiple flow channels respectively.

[0009] In an optional embodiment of this utility model, each of the flow channels is provided with a protruding structure along the height direction of the flow channel.

[0010] In an optional embodiment of the present invention, the protruding structures are symmetrically arranged in the first flow channel cavity and the second flow channel cavity on both sides of the partition.

[0011] In an optional embodiment of this utility model, the protruding structure is disposed on the inner wall of the heat exchange plate.

[0012] In an optional embodiment of this utility model, the protruding structure is disposed on both sides of the partition.

[0013] In an optional embodiment of this utility model, the protruding structure is disposed at the connection between the partition and the inclined rib.

[0014] In an optional embodiment of this utility model, the cross-section of the protrusion structure is polygonal and / or arc-shaped.

[0015] In an optional embodiment of the present invention, the width and / or number of the protrusions in at least a portion of the flow channels are different from those in adjacent flow channels.

[0016] This utility model also proposes a battery pack, including a battery cell and a heat sink as described in any of the above embodiments, wherein the heat sink is attached to the surface of the battery cell for heat exchange.

[0017] In an optional embodiment of this utility model, the battery cell is a square battery and the heat sink is a flat heat sink.

[0018] The technical advantages of this invention lie in the fact that the internal structure of the heat sink is divided into multiple inclined channels by diagonal ribs, and a raised structure is set in the channel to guide the coolant to generate turbulence, further improving heat exchange efficiency. The double-layer diagonal ribs can effectively absorb the tolerance of cell expansion, avoid heat sink deformation, ensure heat dissipation effect, extend battery life, and prevent vertical misalignment during contraction, reducing the formation of interface gaps and improving the durability of the heat exchange system. At the same time, the cross-sectional area of ​​the flow channel is reduced, improving the product's pressure resistance and reducing costs. The raised structure can also provide support while improving heat exchange efficiency, effectively preventing heat sink failure caused by flow channel closure. The double-layer structure can also effectively block the spread of thermal runaway from one side of the cell, greatly improving safety. The diagonal ribs and raised structure can be flexibly arranged according to heat dissipation requirements, making it highly practical. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the heat sink in an optional embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-section of the heat sink in an optional embodiment of the present invention;

[0022] Figure 3 This is a partial structural diagram of the heat sink when the protruding structure is located at the connection between the inclined rib and the partition in an optional embodiment of the present invention.

[0023] Figure 4 This is a partial structural diagram of the heat exchange plate when the protruding structure is located on the inner wall of the heat exchange plate in an optional embodiment of the present invention;

[0024] Figure 5 This is a partial structural diagram of the heat sink when the protruding structure is located on both sides of the partition in an optional embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the heat sink when the protrusion structure is a rectangular protrusion in an optional embodiment of the present invention.

[0026] Figure 7 This is a partial structural diagram of the heat sink when the protrusion structure is a rectangular protrusion in an optional embodiment of the present invention.

[0027] Figure 8 This is a partial structural diagram of the heat sink when the protrusion structure is a trapezoidal protrusion in an optional embodiment of the present invention;

[0028] Figure 9 This is a partial structural diagram of the heat sink when the protrusion structure is a semi-circular protrusion in an optional embodiment of the present invention;

[0029] Figure 10 This is a partial structural diagram of the heat sink when the protrusion structure is a triangular protrusion in an optional embodiment of the present invention.

[0030] Label Explanation:

[0031] 100, Plate body; 200, Partition plate; 300, Diagonal rib; 400, Protruding structure; 110, Flow channel cavity; 111, Flow channel. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] With the development of power battery technology for new energy vehicles, battery heat dissipation has increasingly become a key factor restricting performance and safety. When absorbing cell expansion tolerances, side-cooled heat sinks can experience interfacial gaps and shear stresses due to vertical misalignment, leading to decreased heat transfer efficiency and even crack formation. Existing technologies suffer from insufficient rigidity in heat sink structures and difficulty in balancing expansion absorption with channel stability, while also lacking effective isolation measures in the event of unilateral thermal runaway. Therefore, a novel heat dissipation structure that can both efficiently dissipate heat and adapt to cell expansion is urgently needed.

[0035] Please see Figures 1 to 10This utility model proposes a double-layer oblique-ribbed harmonica tube heat dissipation plate, including a plate body 100, a partition 200, oblique ribs 300, and a raised structure 400. The plate body 100 is a flat tube structure, including two parallel heat exchange plates. The two ends of the heat exchange plates are connected by side plates to form a flow channel cavity 110. The heat exchange medium flows in the flow channel cavity 110 and exchanges heat with the battery through the heat exchange plates. The partition 200 is disposed in the flow channel cavity 110, dividing the flow channel cavity 110 into two layers. The oblique ribs 300 are distributed in the double-layer flow channel cavity 110, dividing the flow channel cavity 110 into multiple flow channels 111. The elasticity of the double-layer oblique ribs 300... The deformation absorbs the expansion tolerance of the battery cell, allowing the plate body 100 to be compressed and preventing shear misalignment. It also blocks heat transfer in the event of unilateral thermal runaway. The protruding structure 400, located on the inner surface of the flow channel cavity 110, provides support and ensures the flow of the heat exchange medium. The inclined ribs 300 and the protruding structure 400 increase the heat dissipation area, improving the heat exchange efficiency between the coolant and the heat sink. The inclined flow channel 111 guides the coolant to generate turbulence, further improving heat exchange efficiency. This heat sink structure solves the problems of gaps and cracks at the heat dissipation interface, improving durability, pressure resistance, and thermal safety. It is understood that this heat sink structure is applicable to battery packs and other devices requiring heat exchange, and can use different heat exchange media according to heat exchange needs, achieving both cooling and heating functions.

[0036] Please see Figures 1 to 2 In an optional embodiment of this utility model, two heat exchange plates are arranged in parallel and connected at both ends by side plates, forming a flow channel cavity 110 between the heat exchange plates. The heat exchange medium flows within the flow channel cavity 110. The outer wall of the heat exchange plate is tightly attached to the side of the battery cell through an interfacial thermally conductive material. The outer surface of the heat exchange plate can absorb the heat emitted from the surface of the battery cell and transfer it to the inner surface. The heat is transferred out through the flow of the heat exchange medium to help dissipate heat from the battery cell. The side plates are smoothly connected to the heat exchange plates. The side plates can be, for example, a semi-circular arc plate structure or... The inclined plate structure, with its smooth, rounded transition, utilizes the angled plate structure and inclined ribs 300 to better achieve compression of the plate body 100. A partition 200 is disposed within the flow channel cavity 110 and arranged parallel to the heat exchange plate, dividing the flow channel cavity 110 into a first flow channel cavity 110 and a second flow channel cavity 110. This double-layer structure can block heat transfer and prevent the spread of thermal runaway in the event of thermal runaway on one side of the battery cell. Furthermore, the layered structure reduces the cross-sectional area of ​​the flow channel 111, improving the product's pressure resistance. The plate body 100 and partition 200 can be manufactured using an integrated molding process.

[0037] Please see Figures 1 to 10In an optional embodiment of this utility model, the inclined ribs 300 are disposed in the first flow channel cavity 110 and the second flow channel cavity 110. The partition plate 200 and the heat exchange plate are connected by the inclined ribs 300. The heat exchange plate is supported by multiple sets of inclined ribs 300, and the first flow channel cavity 110 and the second flow channel cavity 110 are respectively divided into multiple diamond-shaped flow channels 111. The heat exchange medium can flow in the flow channels 111 and carry away heat. The supporting ribs are inclined relative to the heat exchange plate. When the cell expands, the plate body 100 can be compressed, which plays a role in absorbing tolerance. Moreover, the plate body 100 will not be misaligned in the vertical direction during the contraction process, which reduces the generation of interface gaps and improves the durability of the heat exchange system.

[0038] Specifically, please refer to Figures 1 to 10 The oblique ribs 300 are arranged parallel to the width of the heat exchange plate and form a certain angle with the heat exchange plate. The oblique ribs 300 are arranged in a parallel array and obliquely penetrate the flow channel cavity 110. The structure of the oblique ribs 300 has a large adjustable range of tilt angle, can absorb greater tolerance, and has a simple structure and good smoothness. On both sides of the separator 200, the oblique ribs 300 are symmetrically arranged. The symmetrical oblique ribs 300 generate elastic deformation when the cell expands and is compressed, absorbing the tolerance in the X direction. At the same time, the displacement in the Y and Z directions is eliminated through geometric constraints. During the process of battery expansion and compression of the heat sink in the X direction, the heat exchange plate only has translation in the X direction and no displacement in the Y and Z directions, preventing the generation of shear force. This prevents the formation of gaps, reduced fit, and reduced heat sink performance at the heat exchange interface due to shear force, avoids crack formation, and improves the durability of the battery system. In other embodiments, the oblique ribs 300 with different tilt angles can also be designed. For example, oblique ribs 300 with larger tilt angles can be used in the main stress area of ​​battery expansion, and stress abrupt changes can be eliminated with reasonable transition design with other areas.

[0039] It should be noted that the thickness of the inclined rib 300 and the heat exchange plate, as well as the included angle between the inclined rib 300 and the heat exchange plate, can be designed in combination with the deformation of the heat exchange plate material, pressure resistance requirements, and heat dissipation requirements. Since the double-layer inclined rib 300 reduces the cross-sectional area of ​​the flow channel 111 and improves the pressure resistance performance, the spacing of the inclined rib 300 can be adjusted according to the expansion of the battery cell. The large spacing design combined with the thin-walled plate design reduces material costs, and the double-layer structure maintains the cross-sectional area of ​​the flow channel 111, increasing the flow rate.

[0040] Please see Figures 1 to 10In an optional embodiment of this utility model, a protruding structure 400 is provided in each flow channel 111 along the height direction of the flow channel 111. This structure plays a role in turbulence when the heat exchange medium flows, and provides support when the heat exchange plate is compressed to its limit position. Specifically, the protruding structure 400 can be distributed on the inner wall of the heat exchange plate and / or the partition 200. The protruding structure 400 can increase the heat exchange area, improve the heat exchange efficiency, and provide support when the heat dissipation plate is flattened and contracted to absorb the expansion tolerance of the battery cell. This prevents the heat exchange plates on both sides from being excessively squeezed, causing the internal flow channel 111 to close, thus avoiding the serious consequences of the heat exchange medium not flowing and the heat dissipation plate failing to function.

[0041] Please see Figures 1 to 10 In an optional embodiment of this utility model, the cross-section of the protruding structure 400 is polygonal and / or arc-shaped. The protruding structure 400 can be, for example, a rectangular protrusion, a trapezoidal protrusion, a semi-circular protrusion, or a triangular protrusion, etc. One or more protruding structures 400 can be provided in each flow channel 111 to achieve a turbulence effect; and on both sides of the partition plate 200, the protruding structures 400 are symmetrically arranged in the first flow channel cavity 110 and the second flow channel cavity 110, so that when the heat sink is compressed, a resultant force can be formed to achieve better deformation, avoiding shearing when compressed to the limit and causing harmful deformation. By utilizing the arrangement of the protruding structures 400, the heat dissipation efficiency can be improved by locally expanding the heat exchange area, and at the same time, the flow channel 111 can be prevented from closing when flattened and contracted, ensuring the reliability of the cooling medium flow.

[0042] Please see Figure 3 In an optional embodiment of this utility model, the protrusion can be set at the connection between the inclined rib 300 and the partition plate 200 to form multi-point support to evenly distribute compressive stress and avoid local collapse. The inclined rib 300 and the protrusion structure 400 work together to increase the heat dissipation area and guide the heat exchange medium to form turbulence, thereby improving the heat exchange efficiency.

[0043] Please see Figures 4 to 10In another optional embodiment of this utility model, the protruding structure 400 can also be disposed on the inner wall of the heat exchange plate. The protruding structure 400 thins the thermal boundary layer, making it easier for heat to be transferred from the object being cooled to the heat exchange medium, thus improving the heat dissipation effect. The width and / or number of the protruding structures 400 in at least some of the flow channels 111 differ from those in adjacent flow channels 111. That is, in the flow channels 111 on both sides of the separator 200, the width or number of the protruding structures 400 can be differentiated according to the heat dissipation requirements of different parts of the battery. For example, long protrusions can be provided on the inner wall of the heat exchange plate at both ends, and short protrusions can be provided in the middle flow channel 111. Alternatively, according to heat dissipation requirements, a high-density protruding structure 400 can be used for heat exchange in high-heat areas, while conventional configurations are used in other areas to reduce pressure loss, achieving an optimized match between heat dissipation and fluid resistance, resulting in a uniform overall temperature distribution of the battery pack and avoiding localized overheating. In other embodiments, the protruding structure 400 can also be disposed on both sides of the separator 200, and its distribution can be reasonably adjusted according to heat exchange requirements.

[0044] Specifically, considering that heat tends to accumulate in the middle of the battery pack, and the deformation is greatest in the middle section when the battery expands, the number of protrusions 400 in the middle flow channel 111 can be appropriately increased. The flow channel 111 near the cell terminals can also have denser protrusions 400 to specifically enhance local heat dissipation. To ensure uniform deformation and good support during compression, the protrusions 400 on both sides are symmetrically arranged, and the width and density of the protrusions 400 are adjusted according to heat dissipation requirements and process specifications to suit different areas.

[0045] Please see Figures 1 to 10 This utility model also proposes a battery pack, including a battery cell and a heat sink as described in any of the above embodiments. The heat sink is attached to the surface of the battery cell for heat exchange. Specifically, the battery cell is a square battery, and the heat sink is a flat heat sink. The outer surface of the heat sink is tightly attached to the surface of the battery through an interfacial thermally conductive material. The heat of the battery is conducted from the outer surface of the heat sink to the inner surface. The heat exchange medium flows into the flow channel 111 from the inlet end of the heat sink for heat exchange. The heat exchange medium can form turbulence by being guided by the inclined ribs 300 and the raised structure 400, which enhances the heat exchange efficiency. The distribution of the raised structure 400 is different in different heat dissipation areas, so that the temperature of each area of ​​the battery remains uniform and consistent, and local overheating will not occur. When the cell expands, the symmetrical deformation of the inclined ribs 300 can compress the heat sink and ensure the continuous adhesion of the heat exchange interface.

[0046] In summary, this invention significantly improves heat dissipation efficiency and tolerance absorption capacity through the synergistic effect of the double-layer inclined ribs 300 and the raised structure 400, avoids heat dissipation plate deformation, ensures heat dissipation effect, and extends battery life. Furthermore, the differentiated arrangement of the raised structure 400 ensures uniform temperature distribution and prevents localized overheating. The layered inclined rib structure 300 and symmetrical deformation effectively prevent the formation of interface gaps and shear cracks, and improve pressure resistance, allowing for the use of thinner materials to meet the required pressure resistance, thus reducing raw material costs. The double-layer structure can block heat transfer in the event of thermal runaway on one side of the cell, effectively preventing the spread of thermal runaway and ensuring safety and reliability. Finally, the heat dissipation plate structure of this invention effectively improves the durability of the battery system.

[0047] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0048] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0049] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0050] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0051] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a capability of separation or combination that is unclear, a combination of components or steps will also be considered as indicated.

[0052] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0053] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0054] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0055] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A double-layered, diagonally ribbed harmonica tube heat dissipation plate, characterized in that, include: The plate body includes two parallel heat exchange plates, the two ends of which are connected by side plates to form a flow channel cavity; A baffle is disposed in the flow channel cavity, and the baffle is arranged parallel to the heat exchange plate to divide the flow channel cavity into a first flow channel cavity and a second flow channel cavity. Inclined ribs are disposed in the first flow channel cavity and the second flow channel cavity, and are symmetrically arranged on both sides of the partition. The inclined ribs divide the first flow channel cavity and the second flow channel cavity into multiple flow channels respectively.

2. The double-layered beveled-rimmed harmonica heat sink of claim 1, wherein, Each of the flow channels has a protruding structure along its height direction.

3. The double-layered beveled-lip harmonica heat spreader of claim 2, wherein, On both sides of the partition, the protruding structures are symmetrically arranged in the first flow channel cavity and the second flow channel cavity.

4. The double-layered beveled-lip harmonica heat spreader of claim 2, wherein, The protruding structure is disposed on the inner wall of the heat exchange plate.

5. The double-layered beveled-lip harmonica heat spreader of claim 2, wherein, The protruding structures are disposed on both sides of the partition.

6. The double-layered beveled-lip harmonica heat spreader of claim 2, wherein, The protruding structure is located at the connection between the partition and the diagonal rib.

7. The double-layered beveled-lip harmonica heat spreader of claim 2, wherein, The cross-section of the protruding structure is polygonal and / or arc-shaped.

8. The double-layered beveled-lip harmonica heat spreader of claim 2, wherein, The width and / or number of the protrusions in at least a portion of the flow channels differ from those in adjacent flow channels.

9. A battery pack, characterized by, It includes a battery cell and a heat sink as described in any one of claims 1 to 7, wherein the heat sink is attached to the surface of the battery cell for heat exchange.

10. The battery pack according to claim 9, characterized in that, The battery cell is a square battery, and the heat sink is a flat heat sink.

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