Liquid cooling plate structure and battery pack

Abstract

The application relates to the technical field of battery heat dissipation, and provides a liquid cooling plate structure and a battery pack. The liquid cooling plate structure of the application is suitable for cooling an electric core and comprises a structural body, the structural body has two cavities extending along the length direction of the structural body, the two cavities are communicated, and respectively communicate with the liquid inlet and the liquid outlet of the structural body, and a turbulence structure is arranged in at least one cavity, the turbulence structure is in a wave shape and extends along the length direction of the structural body. The liquid cooling plate structure of the application can make the cooling liquid form a vortex by arranging the wave-shaped turbulence structure in the cavity, so that the heat exchange between the cooling liquid and the inner wall of the liquid cooling plate is more sufficient, thereby the cooling efficiency can be improved, the heat dissipation capacity of the battery pack is improved, and the overall safety performance of the battery pack can also be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery heat dissipation technology, and in particular to a liquid cooling plate structure and a battery pack. Background Technology

[0002] Currently, heat dissipation of battery packs in new energy electric vehicles has become a crucial factor affecting their performance. To improve the heat dissipation efficiency of individual battery cells, the industry has designed a liquid cooling plate that can contact the cells for heat dissipation. This liquid cooling plate is sandwiched between adjacent groups of cells, allowing it to contact each cell and thus improve heat dissipation efficiency.

[0003] However, in traditional designs, uneven heat exchange inside the liquid cooling plate leads to local thermal imbalance in the battery cell, which may cause excessive heat in some areas of the cell and lead to thermal runaway. This is detrimental to improving the heat dissipation capacity of the battery pack and the overall safety performance of the battery pack. Utility Model Content

[0004] In view of this, this application aims to propose a liquid cooling plate structure to improve the heat dissipation capacity of the battery pack, thereby improving the overall safety performance of the battery pack.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] A liquid cooling plate structure suitable for cooling battery cells includes a structural body having two cavities extending along its length.

[0007] The two cavities are connected and respectively connected to the liquid inlet and liquid outlet of the structure body, and at least one of the cavities is provided with a turbulence structure, which is wave-shaped and extends along the length of the structure body.

[0008] Furthermore, the turbulence structure includes a turbulence plate connected between the two side walls of the cavity, the turbulence plate dividing the cavity into multiple sub-cavities.

[0009] Furthermore, the spoiler is sinusoidal in shape, and the chord length a of the spoiler and the width w of the battery cell satisfy: w≤a≤2w.

[0010] Furthermore, the cross-section of the cavity is rectangular, arranged along the height direction of the structural body; the spoiler is connected between the two side walls in the width direction of the cavity.

[0011] Furthermore, the height h1 of the cavity and the height h of the battery cell satisfy the following: h1 ≥ 0.25h; and / or, the thickness t of the spoiler is between 1mm and 1.5mm.

[0012] Furthermore, the turbulence structure is disposed on the cavity wall of the cavity and is integrally formed with the structure body.

[0013] Furthermore, the cross-section of the cavity is rectangular, arranged along the height direction of the structure body; the cavity walls on both sides in the width direction of the cavity are provided with the turbulence structure, and the turbulence structure on both sides defines a wave-shaped flow channel in the cavity.

[0014] Furthermore, the contour surface of the turbulence structure near the flow channel is a sine curve, and the period length c of the sine curve satisfies the following relationship with the width w of the battery cell: 0.5w≤c≤w; and / or, the amplitude H of the sine curve satisfies the following relationship with the wall thickness t1 between the structure body and the peak of the sine curve and the wall thickness t2 between the structure body and the center line surface of the sine curve: H=t1-t2, and t1=(0.2~0.3)w1, t2=(0.6~0.8)t1, where W1 is the width of the structure body and W1 is not less than 5mm.

[0015] Furthermore, the two cavities are arranged sequentially along the height direction of the structural body; and / or, the structural body includes a main body and a seat portion located at the bottom of the main body, the liquid inlet, the liquid outlet and the cavity are located on the main body, and the seat portion protrudes to two opposite sides of the main body.

[0016] Compared with the prior art, this application has the following advantages:

[0017] (1) The liquid cooling plate structure described in this application is suitable for cooling battery cells. It is constructed by providing a cavity extending along the length of the structure body and containing a turbulence structure. The turbulence structure is wave-shaped and extends along the length of the structure body. This allows the coolant to form vortices, thereby enabling more thorough heat exchange between the coolant and the inner wall of the liquid cooling plate. This improves cooling efficiency, enhances the heat dissipation capacity of the battery pack, and also helps improve the overall safety performance of the battery pack.

[0018] (2) The turbulence structure includes turbulence plates connected between the two side walls of the cavity, which divide the cavity into multiple sub-cavities. This arrangement, with turbulence plates between the two side walls of the cavity, allows the coolant to form vortices within the cavity, improving the heat exchange capacity between the coolant and the inner wall of the liquid cooling plate. It also prevents dead zones in the coolant within the cavity, ensuring that the coolant maintains a good flow state, thereby further improving the heat dissipation capacity of the battery pack.

[0019] (3) The spoiler is sinusoidal in shape, and the chord length a of the spoiler and the width w of the cell satisfy: w≤a≤2w. This setting can reduce the processing difficulty of the spoiler and control the manufacturing cost of the spoiler, while also increasing the eddy current of the coolant, which is conducive to further improving the heat exchange capacity of the coolant and making the heat exchange of the coolant uniform, thus improving the heat dissipation capacity of the battery pack.

[0020] (4) The cross-section of the cavity is rectangular along the height direction of the structure, and the baffles are connected between the two side walls in the width direction of the cavity. The advantage of this arrangement is that the cross-section of the cavity is rectangular along the height direction of the structure, which is simple in structure and easy to process and manufacture, thereby reducing manufacturing costs and improving production efficiency. Connecting the baffles between the two side walls in the width direction of the cavity can better exert their turbulence effect, thereby enhancing the vortex effect of the coolant, which is beneficial to improving the heat dissipation capacity of the battery pack, and can also enhance the structural strength of the liquid cooling plate, thereby improving the reliability and service life of the liquid cooling plate.

[0021] (5) The height h1 of the cavity and the height h of the cell satisfy the following condition: h1 ≥ 0.25h, and the thickness t of the baffle is between 1mm and 1.5mm. This ensures that the height h1 of the cavity and the height h of the cell satisfy h1 ≥ 0.25h, guaranteeing sufficient contact area between the coolant and the cell, thus ensuring sufficient heat exchange area between the cell and the cavity, and consequently ensuring the heat dissipation capacity of the battery pack. Maintaining the thickness t of the baffle between 1mm and 1.5mm ensures the strength of the flow channel structure while reducing unnecessary material waste, thereby lowering manufacturing costs. It also guarantees the flow channel height, ensuring sufficient contact area between the coolant and the cell, further enhancing the heat dissipation capacity of the battery pack.

[0022] (6) The turbulence structure is located on the cavity wall and is integrally formed with the main body of the structure. The advantage of this design is that it can improve production efficiency, simplify the manufacturing process, thereby reducing processing costs and facilitating the large-scale application of liquid cooling plate structures. At the same time, the turbulence structure, which is integrally formed with the main body of the structure, can ensure that the turbulence structure remains stable during long-term use and will not fail due to aging or loosening of the connection points, thereby extending the service life of the liquid cooling plate and reducing maintenance costs.

[0023] (7) The cross-section of the cavity is rectangular, arranged along the height of the structure. Turbulence structures are provided on both sides of the cavity wall in the width direction, and these structures define wavy flow channels within the cavity. This design, with turbulence structures on both sides of the cavity wall in the width direction and defining wavy flow channels, allows the coolant to form vortices within the cavity, thereby improving the heat exchange capacity between the coolant and the inner wall of the liquid cooling plate. Simultaneously, the wavy flow channel design increases the contact area between the coolant and the cavity wall, further enhancing the heat exchange capacity between them.

[0024] (8) The profile of the turbulence structure near the flow channel is a sine curve, and the period length c of the sine curve and the width w of the cell satisfy the condition: 0.5w≤c≤w. The amplitude H of the sine curve and the wall thickness t1 between the structure body and the peak of the sine curve, and the wall thickness t2 between the structure body and the center line surface of the sine curve satisfy the condition: H=t1-t2, and t1=(0.2~0.3)w1, t2=(0.6~0.8)t1, where W1 is the width of the structure body, and W1 is not less than 5mm. In this way, the period length c of the sine curve and the width w of the cell satisfy the condition: 0.5w≤c≤w, which ensures that one period length covers at least the width of a single cell, thereby ensuring sufficient contact area between the coolant and the cell, and thus ensuring the heat exchange efficiency between the coolant and the cell. At the same time, it can also avoid the increase in manufacturing costs caused by too small a period length, which is conducive to the control of manufacturing costs. The wall thickness t1 between the peaks of the sine curve satisfies: t1 = (0.2~0.3)w1, and the t2 between the center lines of the sine curve satisfies: t2 = (0.6~0.8)t1. Both are used to ensure the coolant flow area and the structural strength of the flow channel. A W1 of not less than 5mm can prevent the battery cells from being too close together, thus affecting the heat dissipation effect.

[0025] (9) Two cavities are arranged sequentially along the height of the main body. The main body includes a main body and a base portion located at the bottom of the main body. The inlet, outlet, and cavities are located on the main body, and the base portion protrudes to opposite sides of the main body. This sequential arrangement of the two cavities along the height of the main body allows for stratified flow of the coolant, ensuring that the coolant flows separately in each cavity and avoiding direct mixing between the cavities, thereby improving coolant utilization efficiency. The protrusion of the base portion to opposite sides of the main body facilitates the connection between the main body and the battery cell.

[0026] This application also proposes a battery pack, which includes the liquid cooling plate structure described above.

[0027] The battery pack of this application, by setting the liquid cooling plate structure as described above, enables more sufficient heat exchange between the coolant and the inner wall of the liquid cooling plate, thereby improving cooling efficiency, enhancing the heat dissipation capacity of the battery pack, and also helping to improve the overall safety performance of the battery pack. Attached Figure Description

[0028] 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:

[0029] Figure 1 This is a schematic diagram of the overall structure of the liquid cooling plate structure described in the first aspect embodiment of this application;

[0030] Figure 2 This is a front view of the liquid-cooled plate structure described in the first aspect embodiment of this application;

[0031] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0032] Figure 4 This is a cross-sectional view of the liquid cooling plate structure described in the first aspect embodiment of this application;

[0033] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0034] Figure 6 This is a front view of the liquid-cooled plate structure described in the second aspect embodiment of this application;

[0035] Figure 7 for Figure 6 A magnified view of a section at point C;

[0036] Figure 8 This is a cross-sectional view of the liquid cooling plate structure described in the second aspect embodiment of this application;

[0037] Figure 9 for Figure 8 A magnified view of a section at point D;

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Structural body; 11. Main body; 111. Liquid inlet; 112. Liquid outlet; 113. Cavity; 12. Seat part; 13. Side wall; 14. Turbulence structure; 141. Turbulence plate; 15. Cavity wall;

[0040] a. Chord length of the spoiler; w. Width of the battery cell; h1. Height of the cavity; h. Height of the battery cell; t. Thickness of the spoiler; c. Period length of the sine curve; H. Amplitude of the sine curve; t1. Wall thickness between the structural body and the crest of the sine curve; t2. Wall thickness between the structural body and the centerline surface of the sine curve; W1. Width of the structural body. Detailed Implementation

[0041] 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.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] The first aspect of this application provides a liquid cooling plate structure, which is applied in a battery pack and is mainly used to cool the battery cells. Furthermore, the liquid cooling plate structure of this embodiment, with its innovative structural design, can improve the heat exchange capacity between the coolant and the inner wall of the liquid cooling plate, thereby improving the cooling efficiency, thereby improving the heat dissipation capacity of the battery pack, and also helping to improve the overall safety performance of the battery pack.

[0048] In existing technologies, heat dissipation of the battery pack in new energy electric vehicles has become a crucial factor affecting its performance. To improve the heat dissipation efficiency of individual battery cells, the industry has designed a liquid cooling plate that can contact the cells for heat dissipation. This liquid cooling plate is sandwiched between adjacent groups of cells, allowing it to contact each cell and thus improve heat dissipation efficiency.

[0049] However, in traditional designs, uneven heat exchange inside the liquid cooling plate leads to local thermal imbalance in the battery cell, which may cause excessive heat in some areas of the cell and lead to thermal runaway. This is detrimental to improving the heat dissipation capacity of the battery pack and the overall safety performance of the battery pack.

[0050] In view of this, in order to overcome the shortcomings of the prior art, in the liquid cooling plate structure suitable for cooling the battery cell in this embodiment, a combination of Figures 1 to 5 As shown, the overall design includes a structural body 1, which has two cavities 113 extending along its length.

[0051] The two cavities 113 are connected and are respectively connected to the liquid inlet 111 and the liquid outlet 112 of the structure body 1. A turbulence structure 14 is provided in at least one of the cavities 113. The turbulence structure 14 is wave-shaped and extends along the length direction of the structure body 1.

[0052] Therefore, by setting a wave-shaped turbulence structure 14 inside the cavity 113, the coolant can form a vortex, thereby making the heat exchange between the coolant and the inner wall of the liquid cooling plate more complete, thus improving the cooling efficiency, thereby enhancing the heat dissipation capacity of the battery pack, and also helping to improve the overall safety performance of the battery pack.

[0053] In detail, in this embodiment, the provision of a turbulence structure 14 in at least one cavity 113 means that the turbulence structure 14 can be provided in either of the two cavities 113, or the turbulence structure 14 can be provided in both cavities 113. Preferably, in the liquid cooling plate structure of this embodiment, the turbulence structure 14 is provided in both cavities 113.

[0054] Based on the above general introduction, specifically, the battery cell 3 in this embodiment can be a battery cell 3 structure that is well known to those skilled in the art, and will not be described in detail here.

[0055] Combination Figures 2 to 4 As shown, in some exemplary embodiments, the turbulence structure 14 includes a turbulence plate 141 connected between the two side walls 13 of the cavity 113, which divides the cavity 113 into multiple sub-cavities. This arrangement, with the turbulence plate 141 between the two side walls 13 of the cavity 113, allows the coolant to form vortices within the cavity 113, improving the heat exchange capacity between the coolant and the inner wall of the liquid cooling plate. It also prevents dead zones in the coolant within the cavity 113, ensuring good flow of the coolant and further enhancing the heat dissipation capacity of the battery pack.

[0056] Combination Figures 4 to 5 As shown, in some exemplary embodiments, the spoiler 141 is sinusoidal in shape, and the chord length 'a' of the spoiler 141 and the width 'w' of the battery cell satisfy: w ≤ a ≤ 2w. This configuration reduces the processing difficulty and manufacturing cost of the spoiler 141 while increasing coolant vortex flow, thereby further enhancing the coolant's heat exchange capacity and ensuring uniform heat transfer, ultimately improving the battery pack's heat dissipation capabilities.

[0057] Continue to combine Figures 3 to 5 As shown, in some exemplary embodiments, the cavity 113 has a rectangular cross-section arranged along the height direction of the structure body 1, and the spoiler 141 is connected between the two side walls 13 in the width direction of the cavity 113.

[0058] The advantage of this arrangement is that the cross-section of the cavity 113 is rectangular, arranged along the height direction of the main body 1. This structure is simple, easy to process and manufacture, thus reducing manufacturing costs and improving production efficiency. Connecting the baffle 141 between the two side walls 13 in the width direction of the cavity 113 allows for better flow control, enhancing the vortex effect of the coolant, which is beneficial for improving the heat dissipation capacity of the battery pack. It also strengthens the structural strength of the liquid cooling plate, thereby improving its reliability and service life.

[0059] Combination Figures 4 to 5 As shown, in some exemplary embodiments, the height h1 of cavity 113 and the height h of cell satisfy the following condition: h1 ≥ 0.25h, and the thickness t of spoiler 141 is between 1mm and 1.5mm.

[0060] This ensures that the height h1 of the cavity 113 and the height h of the battery cell satisfy the condition: h1≥0.25h. This ensures that the coolant and the battery cell have sufficient contact area, thereby ensuring sufficient heat exchange area between the battery cell and the cavity 113, and thus ensuring the heat dissipation capacity of the battery pack.

[0061] By ensuring that the thickness t of the spoiler 141 is between 1mm and 1.5mm, unnecessary material waste can be reduced while maintaining the strength of the flow channel structure, thereby reducing manufacturing costs. It can also ensure the height of the flow channel, thereby ensuring sufficient contact area between the coolant and the battery cell, which in turn helps to further ensure the heat dissipation capacity of the battery pack.

[0062] Continue to combine Figures 1 to 5 As shown, in some exemplary embodiments, two cavities 113 are arranged sequentially along the height direction of the structural body 1. The structural body 1 includes a main body 11 and a seat 12 located at the bottom of the main body 11. The inlet 111, the outlet 112 and the cavity 113 are located on the main body 11, and the seat 12 protrudes to two opposite sides of the main body 11.

[0063] Thus, the two cavities 113 are arranged sequentially along the height direction of the main body 1, which enables the stratified flow of coolant. This ensures that the coolant flows separately in the two cavities 113, avoiding direct mixing of coolant between the cavities 113 and improving the utilization efficiency of the coolant. Furthermore, the fact that the base portion 12 protrudes onto the two opposite sides of the main body portion 11 facilitates the connection between the main body 1 and the battery cell.

[0064] It is worth noting that, regarding the liquid-cooled plate structure of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 5 As shown, it may include, for example, a structural body 1 having two cavities 113 extending along its length.

[0065] The two cavities 113 are connected and communicate with the liquid inlet 111 and liquid outlet 112 of the main body 1, respectively. Each cavity 113 is provided with a turbulence structure 14, which is wave-shaped and extends along the length of the main body 1. The turbulence structure 14 includes a turbulence plate 141 connected between the two side walls 13 of the cavity 113, which divides the cavity 113 into multiple sub-cavities.

[0066] The spoiler 141 is sinusoidal in shape, and the chord length 'a' of the spoiler 141 satisfies the relationship between the width 'w' of the battery cell and the chord length 'a'. The cross-section of the cavity 113 is rectangular, arranged along the height direction of the main structure 1. The spoiler 141 connects the two sidewalls 13 of the cavity 113 in the width direction. The height 'h1' of the cavity 113 satisfies the relationship between the height 'h' of the battery cell and the chord length 'h', where h1 ≥ 0.25h, and the thickness 't' of the spoiler 141 is 1.5 mm.

[0067] In the above preferred embodiments, the specific configuration and arrangement of the spoiler 141, the structural body 1, and the cavity 113 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 spoiler 141, the structural body 1, and the cavity 113 can also be referred to the descriptions in the above exemplary embodiments.

[0068] The liquid cooling plate structure applicable to cooling the battery cell in this embodiment adopts the above design. By setting a wave-shaped turbulence structure 14 in the cavity 113, the coolant can form a vortex, thereby making the heat exchange between the coolant and the inner wall of the liquid cooling plate more sufficient, thus improving the cooling efficiency, thereby improving the heat dissipation capacity of the battery pack, and also helping to improve the overall safety performance of the battery pack.

[0069] An embodiment of the second aspect of this application also provides a liquid cooling plate structure suitable for cooling battery cells. For example... Figures 6 to 9 As shown, the liquid cooling plate structure of this embodiment also includes a structural body 1, a cavity 113, etc., and its overall structure is the same as that of the embodiment of the first aspect. The only difference is that the turbulence structure 14 is provided on the cavity wall 15 of the cavity 113 and is integrally formed with the structural body 1.

[0070] This design improves production efficiency and simplifies manufacturing processes, thereby reducing processing costs and facilitating the large-scale application of liquid-cooled plate structures. Simultaneously, the integrated flow-dissipating structure 14 ensures stability during long-term use, preventing failure due to aging or loosening of connection points, thus extending the service life of the liquid-cooled plate and reducing maintenance costs.

[0071] Continue to combine Figures 6 to 9 As shown, in some exemplary embodiments, the cross-section of the cavity 113 is rectangular along the height direction of the structure body 1, and the cavity walls 15 on both sides of the width direction of the cavity 113 are provided with turbulence structures 14, and the turbulence structures 14 on both sides define a wave-shaped flow channel in the cavity 113.

[0072] Thus, turbulence structures 14 are provided on both sides of the cavity wall 15 in the width direction of the cavity 113, and the turbulence structures 14 on both sides define a wave-shaped flow channel in the cavity 113, which enables the coolant to form a vortex in the cavity 113, thereby improving the heat exchange capacity between the coolant and the inner wall of the liquid cooling plate. At the same time, the wave-shaped flow channel design increases the contact area between the coolant and the cavity wall 15, thereby further improving the heat exchange capacity between the coolant and the cavity wall 15.

[0073] Continue to combine Figures 8 to 9 As shown, in some exemplary embodiments, the profile of the turbulence structure 14 near the flow channel is a sine curve, and the period length c of the sine curve satisfies the following relationship with the width w of the cell: 0.5w≤c≤w.

[0074] This ensures that the period length c of the sine curve and the cell width w satisfy the condition: 0.5w ≤ c ≤ w. This guarantees that one period length covers at least the width of a single cell, ensuring sufficient contact area between the coolant and the cell, thereby ensuring efficient heat exchange between them. Simultaneously, it avoids the increased manufacturing costs associated with excessively short period lengths, thus contributing to cost control.

[0075] The amplitude H of the sine curve and the wall thickness t1 between the structure body 1 and the peak of the sine curve, and the wall thickness t2 between the structure body 1 and the center line surface of the sine curve satisfy: H = t1 - t2, and t1 = (0.2 ~ 0.3)w1, t2 = (0.6 ~ 0.8)t1, where W1 is the width of the structure body 1, and W1 is not less than 5mm.

[0076] The wall thickness t1 between the peaks of the sine curve satisfies: t1 = (0.2~0.3)w1, and the t2 between the center lines of the sine curve satisfies: t2 = (0.6~0.8)t1. These conditions are used to ensure the coolant flow area and the structural strength of the flow channel. A minimum W1 of 5mm prevents the battery cells from being too close together, which could affect heat dissipation.

[0077] It should be noted that related structures and their beneficial effects not mentioned in this embodiment, such as cavity 113 and seat portion 12, can refer to the related structures in the embodiment of the first aspect above.

[0078] An embodiment of the third aspect of this application provides a battery pack having a liquid cooling plate structure as described in any one of the first and second aspects.

[0079] The battery pack in this embodiment, by setting the liquid cooling plate structure as described above, enables more thorough heat exchange between the coolant and the inner wall of the liquid cooling plate, thereby improving cooling efficiency, enhancing the heat dissipation capacity of the battery pack, and also contributing to improving the overall safety performance of the battery pack.

[0080] 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 liquid cooling plate structure suitable for cooling battery cells, characterized in that: Includes a structural body having two cavities extending along its length; The two cavities are connected and respectively connected to the liquid inlet and liquid outlet of the structure body, and at least one of the cavities is provided with a turbulence structure, which is wave-shaped and extends along the length of the structure body.

2. The liquid-cooled plate structure according to claim 1, characterized in that: The turbulence structure includes a turbulence plate connected between the two side walls of the cavity, which divides the cavity into multiple sub-cavities.

3. The liquid-cooled plate structure according to claim 2, characterized in that: The spoiler is sinusoidal in shape, and the chord length a of the spoiler and the width w of the battery cell satisfy: w≤a≤2w.

4. The liquid-cooled plate structure according to claim 2, characterized in that: The cross-section of the cavity is rectangular, arranged along the height direction of the structural body; The spoiler is connected between the two side walls in the width direction of the cavity.

5. The liquid-cooled plate structure according to claim 2, characterized in that: The height h1 of the cavity and the height h of the battery cell satisfy the following conditions: h1 ≥ 0.25h; and / or, The thickness t of the spoiler is between 1mm and 1.5mm.

6. The liquid-cooled plate structure according to claim 1, characterized in that: The turbulence structure is disposed on the cavity wall of the cavity and is integrally formed with the structure body.

7. The liquid-cooled plate structure according to claim 6, characterized in that: The cross-section of the cavity is rectangular, arranged along the height direction of the structural body; The turbulence structure is provided on both sides of the cavity wall in the width direction of the cavity, and the turbulence structure on both sides defines a wave-shaped flow channel in the cavity.

8. The liquid-cooled plate structure according to claim 7, characterized in that: The profile of the turbulence structure near the flow channel is a sine curve, and the period length c of the sine curve satisfies the following relationship with the width w of the battery cell: 0.5w ≤ c ≤ w; and / or, The amplitude H of the sine curve, the wall thickness t1 between the structure body and the peak of the sine curve, and the wall thickness t2 between the structure body and the center line surface of the sine curve satisfy: H = t1 - t2, and t1 = (0.2 ~ 0.3)w1, t2 = (0.6 ~ 0.8)t1, where W1 is the width of the structure body and W1 is not less than 5mm.

9. The liquid-cooled plate structure according to any one of claims 1 to 8, characterized in that: The two cavities are arranged sequentially along the height direction of the structural body; and / or, The structure includes a main body and a base portion located at the bottom of the main body. The liquid inlet, the liquid outlet and the cavity are located on the main body, and the base portion protrudes to two opposite sides of the main body.

10. A battery pack, characterized in that: The battery pack includes a liquid cooling plate structure as described in any one of claims 1 to 9.

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