Cooling structure, battery module, and battery pack

Abstract

The application relates to the technical field of battery cooling, and provides a cooling structure, a battery module and a battery pack. The cooling structure of the application is suitable for cooling cylindrical batteries, and comprises a cooling plate extending along the axial direction of the cylindrical battery and a flow channel arranged on the cooling plate. The cooling plate is in a cylindrical shape suitable for the cylindrical battery, and is formed with an accommodating cavity accommodating the cylindrical battery. One side of the cooling plate is provided with an opening communicating with the accommodating cavity, and the opening is arranged in a penetrating mode along the axial direction of the cooling plate. The cooling structure of the application is provided with the cooling plate extending along the axial direction of the cylindrical battery and the flow channel arranged on the cooling plate, so that the cooling plate can be closely attached to the outer surface of the cylindrical battery, thereby facilitating the improvement of the cooling effect of the cooling structure. The opening communicating with the accommodating cavity is arranged on one side of the cooling plate, so that the high-temperature flue gas generated by thermal runaway of the battery cell can be guided, thereby facilitating the improvement of the safety of the cooling structure.

Description

Technical Field

[0001] This application relates to the field of battery cooling technology, and in particular to a cooling structure, battery module and battery pack. Background Technology

[0002] As a crucial system within a battery, the battery cooling system directly impacts its charge and discharge performance. With increasing charge and discharge power, the heat generated by the battery cells and other electrical components also intensifies. Therefore, the heat dissipation capacity of the battery cooling system plays a vital role in battery performance. However, traditional cylindrical battery cooling solutions suffer from ineffective cooling performance. Utility Model Content

[0003] In view of this, this application aims to propose a cooling structure to improve the cooling effect on cylindrical batteries.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows: A cooling structure suitable for cooling a cylindrical battery includes a cooling plate extending along the axial direction of the cylindrical battery and a flow channel disposed on the cooling plate. The cooling plate is cylindrical and adapted to the cylindrical battery, and has a cavity for accommodating the cylindrical battery. One side of the cooling plate has a notch that communicates with the cavity, and the notch extends through the cooling plate along its axial direction.

[0005] Furthermore, a sealing block is provided at at least one end of the cooling plate along its axial direction. The sealing block is located within the receiving cavity and is used to abut against the cylindrical battery.

[0006] Furthermore, the flow channel is serpentine and extends axially along the cooling plate.

[0007] Furthermore, the cooling plate has an inlet and an outlet at both ends of its axial direction, which are respectively connected to the flow channel, and the inlet and the outlet are respectively located on both sides of the notch; the inlet and / or the outlet are rectangular openings extending along the axial direction of the cooling plate.

[0008] Furthermore, the cavity wall of the receiving cavity is coated with an insulating and thermally conductive adhesive, which is used to fill the gap between the cylindrical battery and the cavity wall of the receiving cavity.

[0009] Compared with the prior art, this application has the following advantages: (1) This application provides a cooling structure suitable for cooling a cylindrical battery, including a cooling plate extending along the axial direction of the cylindrical battery and a flow channel provided on the cooling plate. The cooling plate is cylindrical and adapted to the cylindrical battery, and has a receiving cavity for accommodating the cylindrical battery, so that the cooling plate can fit tightly against the outer surface of the cylindrical battery, thereby improving the cooling effect of the cooling structure. A notch communicating with the receiving cavity is provided on one side of the cooling plate. The notch is provided through the axial direction of the cooling plate, so that the high temperature flue gas generated by thermal runaway can be easily discharged when the battery cell generates thermal runaway, thereby avoiding pressure accumulation and improving the safety of the cooling structure.

[0010] (2) By providing a sealing block at at least one end of the cooling plate along the axial direction, and the sealing block being located within the receiving cavity and used to abut against the cylindrical battery, the battery position can be fixed in the axial direction of the cooling plate, preventing displacement of the cylindrical battery due to vibration or thermal expansion, ensuring that the battery and the cooling plate always maintain good contact, thereby helping to ensure conduction efficiency and thus helping to ensure the cooling effect of the cooling structure. At the same time, the setting of the sealing block also helps to enhance the overall integrity of the cooling structure, preventing it from deforming during operation, thereby helping to improve the durability of the cooling structure.

[0011] (3) Setting the flow channel as a serpentine shape extending along the axial direction of the cooling plate can achieve a longer cooling path in a limited space. This increases the contact area between the cooling medium and the cooling plate, thereby more fully absorbing the heat generated by the battery, which is conducive to improving the heat dissipation efficiency of the cooling structure. At the same time, the serpentine flow channel design makes the flow of the cooling medium in the flow channel smoother, avoiding heat accumulation caused by poor flow of the cooling medium in the flow channel, which is conducive to further improving the heat dissipation efficiency of the cooling structure.

[0012] (4) An inlet and an outlet connected to the flow channel are respectively provided at both ends of the cooling plate along the axial direction, and the inlet and outlet are located on both sides of the notch, so that the cooling medium can smoothly enter and exit the flow channel along the axial direction of the cooling plate, avoiding heat accumulation in the flow channel due to poor flow, which is conducive to improving the heat dissipation efficiency of the cooling structure. Setting the inlet and / or outlet as a rectangular opening extending along the axial direction of the cooling plate can provide a larger flow cross-sectional area under the same space constraints, thereby reducing the flow velocity of the coolant when entering and exiting, reducing local resistance, which is conducive to ensuring a larger coolant flow rate, and thus improving the heat dissipation capacity of the cooling structure.

[0013] (5) An insulating thermally conductive adhesive is coated on the cavity wall of the receiving cavity, and the insulating thermally conductive adhesive fills the gap between the cylindrical battery and the cavity wall. This helps to ensure that the cylindrical battery and the cooling plate always maintain good contact, reduces thermal resistance, and allows the heat generated by the cylindrical battery to be quickly transferred to the cooling plate, thereby improving the heat dissipation efficiency of the cooling structure. At the same time, the insulating thermally conductive adhesive that fully fills the gap between the cylindrical battery and the cavity wall also prevents the cylindrical battery from shaking in the receiving cavity. The insulating thermally conductive adhesive also forms a protective layer, thereby ensuring good electrical isolation between the cylindrical battery and the cooling plate and external moisture. While improving system safety, it can also effectively protect the cylindrical battery and extend its service life.

[0014] In addition, this application also proposes a battery module, which includes the cooling structure described above and a cylindrical battery disposed in the receiving cavity.

[0015] Furthermore, the cylindrical batteries are multiple units stacked along the axial direction of the cooling plate, and adjacent cylindrical batteries are connected by palladium sheets.

[0016] Furthermore, the palladium sheet includes two connecting portions spaced apart along the axial direction of the cooling plate, and a support portion disposed between the two connecting portions, the two connecting portions being respectively connected to the cylindrical battery on the corresponding side.

[0017] Furthermore, the cooling plate is surrounded by cable ties that bind multiple cylindrical batteries together with the cooling plate.

[0018] The battery module described in this application, by setting the cooling structure as described above, can improve the heat dissipation performance of the battery module, enhance the structural stability of the battery module, and improve the safety performance of the battery module, thereby helping to enhance the market competitiveness of the battery module.

[0019] By stacking multiple cylindrical batteries along the axial direction of a cooling plate, with adjacent batteries connected by palladium sheets, displacement of the batteries in the axial direction of the cooling plate due to vibration or impact can be prevented. This helps avoid loosening or damage to electrical connections caused by axial displacement of the batteries, thus improving the reliability of the battery module. Furthermore, the palladium sheet connection structure is simple and easy to implement, simplifying the battery pack structure and reducing production difficulty, thereby facilitating the manufacturing of the battery module.

[0020] The palladium sheet includes two connecting portions spaced apart along the axial direction of the cooling plate, and a supporting portion located between the two connecting portions. Each connecting portion is connected to a cylindrical battery on a corresponding side. This axial spacing between the two connecting portions absorbs tolerances, further preventing displacement of the cylindrical batteries along the axial direction of the cooling plate due to vibration or impact, thus improving the reliability of the battery module. The connection of the two connecting portions spaced apart along the axial direction of the cooling plate to the cylindrical batteries on corresponding sides effectively ensures the stability of the electrical connection between adjacent cylindrical batteries, further enhancing the reliability of the battery module.

[0021] Cable ties surround the cooling plate, binding multiple cylindrical batteries together to ensure tight contact and improve heat dissipation. This also prevents the batteries from shifting or shaking within the cooling plate due to vibration or impact, enhancing the battery module's reliability. Furthermore, the simple cable tie structure facilitates manufacturing, reducing production costs and increasing the battery module's market competitiveness.

[0022] In addition, this application also proposes a battery pack equipped with the above-mentioned battery module.

[0023] The battery pack of this application, by setting up the battery module as described above, can improve the reliability and safety of the battery pack, while also helping to control the manufacturing cost of the battery pack, thereby enhancing the market competitiveness of the battery pack. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the cooling structure described in the embodiments of this application; Figure 2 This is a schematic diagram of the flow channel structure described in the embodiments of this application; Figure 3 This is an exploded view of the battery module described in the embodiments of this application; Figure 4 This is a cross-sectional view of the battery module described in the embodiments of this application; Figure 5 for Figure 4 A partial structural diagram at point A in the middle; Figure 6 for Figure 4 A schematic diagram of the local structure at point B; Figure 7 This is a cross-sectional view of the sealing block described in an embodiment of this application; Figure 8 This is a schematic diagram of the palladium sheet structure described in the embodiments of this application; Explanation of reference numerals in the attached figures: 1. Cooling plate; 11. Notch; 12. Receiving cavity; 13. Liquid inlet; 14. Liquid outlet; 15. Flow channel; 2. Cylindrical battery; 3. Palladium sheet; 31. Connecting part; 32. Supporting part; 4. Sealing block; 41. Main body; 42. Electrode clearance hole; 43. Opening; 5. Output electrode palladium sheet; 6. Cable tie. Detailed Implementation

[0025] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0029] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0031] The first aspect of this application provides a cooling structure, which is mainly used to cool a cylindrical battery. Furthermore, the cooling structure of this embodiment, through its innovative structural design, can improve the cooling effect on the cylindrical battery while enhancing the ability to suppress thermal runaway of the cylindrical battery.

[0032] As a critical system within the battery, the battery cooling system not only directly affects the battery's charge and discharge performance but is also closely related to its stable operation. With the continuous increase in battery charge and discharge power, the heat generation of the battery cells and other electrical components also intensifies. Therefore, the heat dissipation capacity of the battery cooling system plays a vital role in fully realizing the battery's performance.

[0033] In related technologies, power battery system cooling mainly includes liquid thermal cooling, refrigerant cooling, air cooling, and immersion liquid cooling. Among these, liquid cooling is the most widely used and is also one of the most efficient solutions. Traditional cylindrical battery cooling solutions are mainly divided into serpentine tube liquid cooling and immersion liquid cooling. However, serpentine tube cooling, due to its small cooling area, is difficult to meet the heat dissipation requirements of high-rate charging; immersion liquid cooling carries the risk of insulation failure due to prolonged cycling and has poor protection against thermal runaway. Therefore, traditional cylindrical battery cooling solutions generally suffer from poor cooling performance and difficulty in effectively suppressing thermal runaway.

[0034] In view of this, in order to overcome the shortcomings of the prior art, the cooling structure of this embodiment combines... Figures 1 to 8 As shown, the overall design includes a cooling plate 1 extending along the axial direction of the cylindrical battery 2, and a flow channel 15 disposed on the cooling plate 1.

[0035] The cooling plate 1 is cylindrical and adapted to the cylindrical battery 2, and has a cavity 12 for accommodating the cylindrical battery 2. One side of the cooling plate 1 has a notch 11 that communicates with the cavity 12, and the notch 11 is arranged through the axial direction of the cooling plate 1.

[0036] Therefore, by setting a cooling plate 1 extending along the axial direction of the cylindrical battery 2 and a flow channel 15 on the cooling plate 1, the cooling plate 1 is cylindrical to fit the cylindrical battery 2 and forms a receiving cavity 12 to accommodate the cylindrical battery 2, so that the cooling plate 1 can fit tightly against the outer surface of the cylindrical battery 2, thereby improving the cooling effect of the cooling structure. On one side of the cooling plate 1, a notch 11 communicating with the receiving cavity 12 is provided. The notch 11 is provided through the axial direction of the cooling plate 1, so that when the battery cell experiences thermal runaway, the high-temperature flue gas generated by thermal runaway can be easily diverted, thereby avoiding pressure accumulation and improving the safety of the cooling structure.

[0037] Based on the above general introduction, specifically, the cylindrical battery 2 described in this embodiment is usually a large cylindrical battery well known to those skilled in the art, such as 4680, 4695, 46120, etc., which has advantages such as high energy density and high production efficiency compared to traditional small cylindrical batteries (such as 18650, 21700).

[0038] The cooling plate 1 in this embodiment includes a cooling plate 1 body 41 and a cavity disposed inside the cooling plate 1. A supporting rib is provided in the cavity between two opposite sidewalls of the liquid cooling plate. The aforementioned flow channel 15 is formed by the cavity inside the cooling plate 1 and the supporting rib, and is used to allow coolant to flow, thereby cooling the cylindrical battery 2. It should be noted that the liquid cooling plate in this embodiment is typically made of copper or aluminum alloy, which is well known to those skilled in the art, and will not be described further.

[0039] Combination Figure 1 , Figure 3 as well as Figure 7 As shown, in some exemplary embodiments, a sealing block 4 is provided at at least one end of the cooling plate 1 in the axial direction. The sealing block 4 is located in the receiving cavity 12 and is used to abut against the cylindrical battery 2.

[0040] This configuration fixes the cylindrical battery 2 in the axial direction of the cooling plate 1, preventing displacement due to vibration or thermal expansion. It ensures good contact between the battery and the cooling plate 1, thus guaranteeing conductivity and overall cooling performance. Simultaneously, the sealing block 4 enhances the overall integrity of the cooling structure, preventing deformation during operation and improving its durability.

[0041] In detail, the sealing block 4 in this embodiment includes a main body 41, an electrode clearance hole 42, and an opening 43. It is C-shaped overall, with the C-shaped opening 43 corresponding to the notch 11 of the cooling plate 1, and the electrode clearance hole 42 corresponding to the electrode of the cylindrical battery 2. This facilitates the welding of the output palladium plate 5, which is located on the electrode of the cylindrical battery 2, to the cylindrical battery 2, thereby benefiting the production of the battery module.

[0042] Furthermore, in specific implementation, the cooling structure of this embodiment is provided with sealing blocks 4 at both ends of the cooling plate 1 in the axial direction to fix the position of the cylindrical battery 2 in the axial direction of the cooling plate 1. During assembly, the sealing blocks 4 can be C-type springs well known to those skilled in the art, which are fixed to the cooling plate 1 by snap-fit, and the connection reliability between the sealing blocks 4 and the cooling plate 1 can be further improved by applying adhesive.

[0043] Combination Figure 2 As shown, in some exemplary embodiments, the flow channel 15 is serpentine, extending axially along the cooling plate 1. This arrangement allows for a longer cooling path within a limited space, increasing the contact area between the cooling medium and the cooling plate 1, thus more effectively absorbing the heat generated by the battery and improving the heat dissipation efficiency of the cooling structure. Simultaneously, the serpentine flow channel 15 design ensures smoother flow of the cooling medium within the channel 15, preventing heat accumulation due to poor flow and further enhancing the heat dissipation efficiency of the cooling structure.

[0044] In specific implementation, the flow channel 15 can be a serpentine shape extending along the axial direction of the cooling plate 1, or other shapes, such as a flat tube straight through. As long as a longer cooling path can be achieved within a limited space and the contact area between the cooling medium and the cooling plate 1 can be increased, which is conducive to improving the heat dissipation efficiency of the cooling structure, it will not be elaborated further.

[0045] Combination Figures 1 to 3 As shown, in some exemplary embodiments, the cooling plate 1 has an inlet 13 and an outlet 14 at both ends of its axial direction, respectively, which communicate with the flow channel 15, and the inlet 13 and outlet 14 are located on both sides of the notch 11. This arrangement allows the cooling medium to smoothly enter and exit the flow channel 15 along the axial direction of the cooling plate 1, avoiding heat accumulation in the flow channel 15 due to poor flow, thereby improving the heat dissipation efficiency of the cooling structure.

[0046] By making the inlet 13 and outlet 14 rectangular openings extending axially along the cooling plate 1, a larger flow cross-sectional area can be provided within the same space constraints. This reduces the flow velocity of the coolant during entry and exit, decreases local resistance, and helps ensure a larger coolant flow rate, thereby improving the heat dissipation capacity of the cooling structure. However, in practical implementation, it should be noted that the inlet 13 and outlet 14 can be not only rectangular openings extending axially along the cooling plate 1, but also other shapes, as long as the design requirements are met.

[0047] Continue to combine Figures 1 to 3 As shown, in some exemplary embodiments, the cavity wall of the receiving cavity 12 is coated with an insulating thermally conductive adhesive, which fills the space between the cylindrical battery 2 and the cavity wall of the receiving cavity 12.

[0048] Thus, it is understandable that the insulating thermally conductive adhesive can fill the gap between the cylindrical battery 2 and the cavity wall of the receiving cavity 12, thereby ensuring good contact between the battery and the cooling plate, reducing thermal resistance, and allowing the heat generated by the cylindrical battery 2 to be quickly transferred to the cooling plate 1, thereby improving the heat dissipation efficiency of the cooling structure. At the same time, the insulating thermally conductive adhesive that fully fills the gap between the cylindrical battery 2 and the cavity wall of the receiving cavity 12 can also prevent the cylindrical battery 2 from shaking in the receiving cavity.

[0049] In addition, the insulating and thermally conductive adhesive covering the cylindrical battery 2 can also form a protective layer, thereby ensuring good electrical isolation between the cylindrical battery 2 and the cooling plate 1 and external moisture. While improving system safety, it can also effectively protect the cylindrical battery 2 and extend its service life.

[0050] In specific implementation, the insulating and thermally conductive adhesive used in this embodiment can be any insulating and thermally conductive adhesive well known to those skilled in the art, such as thermally conductive gel, as long as it can fill the gap between the cylindrical battery 2 and the cavity wall of the receiving cavity 12.

[0051] It is worth noting that, regarding the cooling structure of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 3 As shown, it may include, for example, a cooling plate 1 extending along the axial direction of the cylindrical battery 2, and a flow channel 15 provided on the cooling plate 1.

[0052] The cooling plate 1 is cylindrical and adapted to the cylindrical battery 2, forming a receiving cavity 12 to accommodate the cylindrical battery 2. One side of the cooling plate 1 has a notch 11 communicating with the receiving cavity 12, which extends through the cooling plate 1 axially. Sealing blocks 4 are provided at both ends of the cooling plate 1 axially, located within the receiving cavity 12 and used to abut against the cylindrical battery 2. The flow channel 15 is serpentine and extends along the axial direction of the cooling plate 1.

[0053] The cooling plate 1 has an inlet 13 and an outlet 14 at its two axial ends, which are connected to the flow channel 15. The inlet 13 and outlet 14 are located on both sides of the notch 11 and are rectangular openings extending along the axial direction of the cooling plate 1. The cavity wall of the receiving cavity 12 is coated with insulating thermally conductive adhesive, which fills the space between the cylindrical battery 2 and the cavity wall of the receiving cavity 12.

[0054] In the preferred embodiment of the mounting bracket described above, the specific configuration and arrangement of the cylindrical battery 2, cooling plate 1, and sealing block 4 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the cylindrical battery 2, cooling plate 1, and sealing block 4 can also be referred to the descriptions in the above exemplary embodiments.

[0055] The cooling structure of this embodiment adopts the above design. By setting a cooling plate 1 extending along the axial direction of the cylindrical battery 2 and a flow channel 15 on the cooling plate 1, the cooling plate 1 is cylindrical to fit the cylindrical battery 2 and forms a receiving cavity 12 to accommodate the cylindrical battery 2. This allows the cooling plate 1 to fit tightly against the outer surface of the cylindrical battery 2, thereby improving the cooling effect of the cooling structure. A notch 11 communicating with the receiving cavity 12 is set on one side of the cooling plate 1. The notch 11 is arranged through the axial direction of the cooling plate 1, which facilitates the drainage of high-temperature flue gas generated by thermal runaway when the battery cell experiences thermal runaway. This helps to avoid pressure accumulation and improves the safety of the cooling structure.

[0056] The second aspect of this application provides a battery module in which the cooling structure described in the first aspect of this application is provided.

[0057] The battery module in this embodiment, by setting the cooling structure as described above, can improve the heat dissipation performance of the battery module, enhance the structural stability of the battery module, and improve the safety performance of the battery module, thereby helping to enhance the market competitiveness of the battery module.

[0058] Combination Figures 3 to 6 As shown, in some exemplary embodiments, the cylindrical cells 2 are multiple cells stacked along the axial direction of the cooling plate 1, and adjacent cylindrical cells 2 are connected by palladium sheets 3.

[0059] This design prevents the cylindrical battery 2 from shifting axially along the cooling plate 1 due to vibration or impact, thus avoiding loosening or damage to electrical connections caused by axial displacement of the cylindrical battery 2 along the cooling plate 1, and consequently improving the reliability of the battery module. At the same time, the palladium sheet 3 connection structure is simple and easy to implement, simplifying the battery pack structure and reducing production difficulty, thereby facilitating the manufacturing of the battery module.

[0060] Combination Figure 6 as well as Figure 8 As shown, in some exemplary embodiments, the palladium sheet 3 includes two connecting portions 31 spaced apart along the axial direction of the cooling plate 1, and a support portion 32 disposed between the two connecting portions 31, the two connecting portions 31 being connected to the cylindrical battery 2 on the corresponding side.

[0061] Thus, it is understandable that the axial spacing of the two connecting parts 31 can absorb tolerances, thereby further preventing the cylindrical battery 2 from shifting axially in the cooling plate 1 due to vibration or impact, which in turn helps to improve the reliability of the battery module. Furthermore, the two connecting parts 31, spaced axially along the cooling plate 1, are respectively connected to the cylindrical batteries 2 on the corresponding sides, effectively ensuring the stability of the electrical connection between adjacent cylindrical batteries 2, thereby further improving the reliability of the battery module.

[0062] Combination Figure 1 as well as Figure 3 As shown, in some exemplary embodiments, a cable tie 6 surrounds the cooling plate 1, binding multiple cylindrical batteries 2 together with the cooling plate 1. This arrangement ensures tight contact between the batteries and the cooling plate 1, thereby further improving the heat dissipation effect of the cooling plate 1. Simultaneously, binding the multiple cylindrical batteries 2 together with the cooling plate 1 via the cable tie 6 also prevents the cylindrical batteries 2 from radially wobbling within the cooling plate 1 due to vibration or impact, which helps improve the reliability of the battery module. Furthermore, the cable tie 6's fixing structure is simple and easy to manufacture, thus helping to reduce the production cost of the battery module and thereby enhancing its market competitiveness.

[0063] It should be noted that related structures not mentioned in this embodiment, such as cable ties 6, can be referred to as cable tie structures and accessories well known to those skilled in the art, and will not be described in detail here.

[0064] In this embodiment, the battery module is assembled as follows: First, multiple cylindrical batteries 2 are arranged in a stacked configuration along the axial direction of the cooling plate 1, and adjacent cylindrical batteries 2 are connected by palladium sheets 3. Then, insulating thermally conductive adhesive is applied to the cavity wall of the receiving cavity 12, and a sealing block 4 is snapped onto one end of the cooling plate 1 along its axial direction, with adhesive used for auxiliary fixation. Next, the battery group is placed into the receiving cavity 12, ensuring the cylindrical batteries 2 abut against the sealing block 4. At this point, a sealing block 4 is snapped onto the other end of the cooling plate 1 along its axial direction, and adhesive is used for auxiliary fixation to achieve axial positioning of the batteries on the cooling plate 1. Multiple cable ties 6 are arranged along the axial direction of the cooling plate 1 and tightened to bind the multiple cylindrical batteries 2 together with the cooling plate 1, thereby achieving radial contact between the cylindrical batteries 2 and the cooling plate 1 to prevent radial movement of the cylindrical batteries 2. Finally, output palladium sheets 5 are welded to the electrodes of the cylindrical batteries 2 at both ends of the cooling plate 1 along its axial direction, serving as the positive and negative electrodes of the battery module.

[0065] This embodiment also proposes a battery pack, which includes the battery module described above.

[0066] The battery pack in this embodiment, by setting up the battery modules as described above, can improve the reliability and safety of the battery pack while also helping to control the manufacturing cost of the battery pack, thereby enhancing the market competitiveness of the battery pack.

[0067] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A cooling structure suitable for cooling a cylindrical battery, characterized in that: It includes a cooling plate extending along the axial direction of the cylindrical battery, and a flow channel disposed on the cooling plate; The cooling plate is cylindrical and adapted to the cylindrical battery, and has a cavity for accommodating the cylindrical battery. One side of the cooling plate has a notch that communicates with the cavity, and the notch extends through the cooling plate along its axial direction.

2. The cooling structure according to claim 1, characterized in that: A sealing block is provided at at least one end of the cooling plate along its axial direction. The sealing block is located within the receiving cavity and is used to abut against the cylindrical battery.

3. The cooling structure according to claim 1, characterized in that: The flow channel is serpentine and extends axially along the cooling plate.

4. The cooling structure according to claim 1, characterized in that: The cooling plate has an inlet and an outlet at both ends of its axial direction, which are respectively connected to the flow channel, and the inlet and outlet are respectively located on both sides of the notch. The liquid inlet and / or the liquid outlet are rectangular openings extending axially along the cooling plate.

5. The cooling structure according to any one of claims 1 to 4, characterized in that: The cavity wall is coated with an insulating and thermally conductive adhesive, which fills the space between the cylindrical battery and the cavity wall.

6. A battery module, characterized in that: It includes the cooling structure according to any one of claims 1 to 5, and a cylindrical battery disposed within the receiving cavity.

7. The battery module according to claim 6, characterized in that: The cylindrical cells are multiple cells stacked along the axial direction of the cooling plate, and adjacent cylindrical cells are connected by palladium sheets.

8. The battery module according to claim 7, characterized in that: The palladium sheet includes two connecting portions spaced apart along the axial direction of the cooling plate, and a supporting portion disposed between the two connecting portions; The two connecting portions are respectively connected to the cylindrical battery on the corresponding side.

9. The battery module according to any one of claims 6 to 8, characterized in that: The cooling plate is surrounded by cable ties, which bind multiple cylindrical batteries together with the cooling plate.

10. A battery pack, characterized in that: The battery pack is provided with the battery module as described in any one of claims 6 to 9.

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