Cooling plate and battery pack

Abstract

The application belongs to the technical field of batteries, and discloses a cooling plate and a battery pack, wherein the cooling plate is provided with a turbulence structure on the inner wall of a flow channel, the turbulence structure is a spiral groove extending along the extension direction of the flow channel and coaxial with the flow channel, the setting of the turbulence structure not only enlarges the heat absorption area of the cooling liquid, but also has a turbulence effect on the cooling liquid, effectively improves the heat absorption efficiency of the cooling liquid, and further improves the cooling effect of the cooling plate on the battery cell.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a cooling plate and a battery pack. Background Technology

[0002] The cells in a battery module generate a lot of heat during charging and discharging. To cool the cells, cooling plates are usually installed inside the battery box to absorb the heat generated by the cells and ensure that the cells can operate within a safe temperature range.

[0003] In the prior art, the coolant channel of the cooling plate is a through-slot structure. The coolant enters the coolant channel from one end of the through-slot, flows along the extension direction of the through-slot, and then exits the coolant channel from the other end of the through-slot. When the coolant flows in the through-slot, it absorbs the heat generated by the battery cell, thereby achieving the effect of cooling the battery cell by the cooling plate.

[0004] However, the cooling effect of the aforementioned cooling plate on the battery cell is very limited. Specifically, the flow rate of the coolant in the channel is relatively high, making it difficult for the coolant to form turbulence in the channel, which reduces the heat absorption efficiency of the coolant. At the same time, the limited contact area between the coolant and the inner wall of the channel also reduces the heat absorption efficiency of the coolant, thereby reducing the cooling effect of the cooling plate on the battery cell.

[0005] Therefore, there is an urgent need to propose a cooling plate and battery pack to solve the above-mentioned technical problems. Summary of the Invention

[0006] One object of the present invention is to provide a cooling plate that enables the coolant flowing in the flow channel to have a high heat absorption efficiency.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The cooling plate has flow channels through which coolant flows. The inner wall of the flow channels has a turbulence structure, which is a spiral groove extending along the direction of the flow channels and coaxial with the flow channels.

[0009] Optionally, the turbulence structure includes at least two turbulence channels, which are connected to each other, and the depths of the at least two turbulence channels are different.

[0010] Optionally, along the extension direction of the flow channel, the depth of at least two turbulence channels gradually increases.

[0011] Optionally, along the extension direction of the flow channel, in two adjacent turbulence channels, the depth of the latter turbulence channel is 1 to 2 times the depth of the former turbulence channel.

[0012] Optionally, the turbulence structure further includes at least one transition groove, with two adjacent turbulence grooves connected by the transition groove. Along the extension direction of the flow channel, the depth of the transition groove is less than the depth of the turbulence groove adjacent to the transition groove.

[0013] Optionally, along the extension direction of the flow channel, the depth of the transition groove is 10%-60% of the depth of the turbulence groove adjacent to the transition groove.

[0014] Optionally, the turbulence structure includes a first turbulence channel, a second turbulence channel, and a first transition channel, which are connected sequentially along the extension direction of the flow channel.

[0015] Optionally, the depth d of the first transition groove is 10%-30% of the depth b of the second turbulence groove.

[0016] Optionally, the turbulence structure also includes a second transition groove and a third turbulence groove, which are connected sequentially along the extension direction of the flow channel.

[0017] Optionally, the depth f of the second transition groove is 30%-60% of the depth c of the third turbulence groove.

[0018] Optionally, the depth 'a' of the first turbulence channel is 10%-30% of the channel radius.

[0019] Optionally, the cross-section of the turbulence channel is trapezoidal, and the lower base of the trapezoid faces the axial direction of the flow channel.

[0020] Optionally, the trapezoid is an isosceles trapezoid.

[0021] Optionally, the angle between the lower base and the waist of the isosceles trapezoid is called the lower base angle, and the lower base angle of at least two turbulence channels gradually increases along the extension direction of the flow channel.

[0022] Optionally, the angle between the lower base and the waist of the isosceles trapezoid is the lower base angle. The turbulence structure includes a first turbulence groove and a second turbulence groove. The first turbulence groove and the second turbulence groove are connected in sequence along the extension direction of the flow channel. The lower base angle β of the first turbulence groove is in the range of 15°-45°, and the lower base angle γ of the second turbulence groove is in the range of 25°-60°.

[0023] Optionally, the turbulence structure also includes a third turbulence channel. Along the extension direction of the flow channel, the first turbulence channel, the second turbulence channel and the third turbulence channel are connected in sequence, and the lower bottom angle δ of the third turbulence channel is in the range of 40°-75°.

[0024] Optionally, there may be multiple turbulence structures, which are arranged sequentially along the extension direction of the flow channel.

[0025] Optionally, multiple turbulence structures are spaced apart along the extension direction of the flow channel.

[0026] Optionally, the spacing h between two adjacent perturbation structures is 1mm-5mm.

[0027] Optionally, a turbulence-inducing structure is provided on the inner wall of the flow channel from the inlet to the outlet.

[0028] Another object of the present invention is to provide a battery pack that has high safety.

[0029] To achieve this objective, the present invention adopts the following technical solution:

[0030] The battery pack includes a battery box, battery modules, and the aforementioned cooling plate, with the battery modules and cooling plate both installed inside the battery box.

[0031] Optionally, the battery module includes multiple battery cells arranged sequentially along a preset direction, and the outer wall of the cooling plate is a contoured surface that conforms to the shape of the battery cells.

[0032] Optionally, the battery cell is a cylindrical battery cell, and the outer wall of the cooling plate is a continuous wave-like shape.

[0033] Beneficial effects:

[0034] The cooling plate provided by this invention has a turbulence structure on the inner wall of the flow channel. The turbulence structure is a spiral groove extending along the direction of the flow channel and coaxial with the flow channel. The coolant can not only contact the inner wall of the flow channel, but also the bottom and sidewalls of the groove, effectively expanding the heat absorption area of ​​the coolant and improving the heat absorption efficiency of the coolant. At the same time, the spiral groove creates a turbulence effect on the coolant, enabling the coolant to form turbulence in the flow channel, further improving the heat absorption efficiency of the coolant, and thus improving the cooling effect of the cooling plate provided by this invention on the battery cell.

[0035] The battery pack provided by this invention uses the aforementioned cooling plate, which can efficiently absorb the heat generated by the battery cells in the battery module, reducing the probability of thermal runaway due to excessive temperature and effectively improving the safety of the battery pack. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the assembly structure of the cooling plate, the liquid inlet collector, and the liquid outlet collector provided by the present invention.

[0037] Figure 2 This is an enlarged schematic diagram of the end structure of the cooling plate provided by the present invention;

[0038] Figure 3 This is a cross-sectional view of the middle section of the cooling plate provided by the present invention;

[0039] Figure 4 yes Figure 3Sectional view in the XX direction;

[0040] Figure 5 yes Figure 4 Enlarged view of a portion of point A in the middle.

[0041] In the picture:

[0042] 100 Cooling plate; 200 Liquid inlet collector; 300 Liquid outlet collector; 110 Flow channel; 120 Turbulence structure; 121 First turbulence groove; 122 Second turbulence groove; 123 Third turbulence groove; 124 First transition groove; 125 Second transition groove. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0047] This embodiment provides a cooling plate that enables the coolant flowing in the channel to have a high heat absorption efficiency.

[0048] Specifically, such as Figures 1 to 4 As shown, the cooling plate 100 has a flow channel 110, in which coolant flows. The inner wall of the flow channel 110 has a turbulence structure 120, which is a spiral groove extending along the extension direction of the flow channel 110 and coaxial with the flow channel 110.

[0049] The cooling plate 100 has a turbulence structure 120 on the inner wall of the flow channel 110. The turbulence structure 120 is a spiral groove extending along the direction of the flow channel 110 and coaxial with the flow channel 110. The coolant can not only contact the inner wall of the flow channel 110, but also the bottom and sidewalls of the groove, effectively expanding the heat absorption area of ​​the coolant and improving the heat absorption efficiency of the coolant. At the same time, the spiral groove creates a turbulence effect on the coolant, enabling the coolant to form turbulence within the flow channel 110, further improving the heat absorption efficiency of the coolant, and thus improving the cooling effect of the cooling plate 100 provided by this invention on the battery cell. It should be noted that the coolant can be a refrigerant or cooling water, depending on the specific application requirements.

[0050] Optionally, such as Figures 1 to 5 As shown, the turbulence structure 120 includes at least two turbulence channels. Exemplarily, the number of turbulence channels can be two, three, or four, etc. The at least two turbulence channels are connected, and the depths of the at least two turbulence channels are different. By setting the depths of the at least two turbulence channels to be different, as the coolant flows along the extension direction of the flow channel 110, the turbulence effect of each turbulence channel on the coolant will vary depending on the depth of the turbulence channel. This is beneficial for further enhancing the turbulence effect of the turbulence channels on the coolant, promoting the formation of turbulence in the coolant, and thus further improving the heat absorption efficiency of the coolant. It should be noted that, for ease of understanding, Figure 5 The dashed line in the middle represents the inner wall of the flow channel 110 when the turbulence structure 120 is not set.

[0051] Furthermore, such as Figures 1 to 5As shown, along the extension direction of the flow channel 110, the depth of at least two turbulence grooves gradually increases. The turbulence effect of the turbulence grooves on the coolant increases with the increase of the groove depth. Therefore, this structural arrangement will cause the coolant to experience a gradually increasing turbulence effect as it flows along the extension direction of the flow channel 110, which is beneficial for creating a better turbulence effect in the flow channel 110, thereby improving the heat absorption efficiency of the coolant. Preferably, along the extension direction of the flow channel 110, in two adjacent turbulence grooves, the depth of the latter turbulence groove is 1 to 2 times the depth of the former turbulence groove. For example, in two adjacent turbulence grooves, the depth of the latter turbulence groove can be 1, 1.2, 1.5, or 2 times the depth of the former turbulence groove, etc. This can both create a better turbulence effect in the coolant within the flow channel 110 and control the groove depth within a certain range to ensure the structural strength of the cooling plate 100.

[0052] Optionally, such as Figures 1 to 5 As shown, the turbulence structure 120 also includes at least one transition groove. Two adjacent turbulence grooves are connected by the transition groove. Along the extension direction of the flow channel 110, the depth of the transition groove is less than the depth of the adjacent turbulence groove, so as to further enhance the turbulence effect of the turbulence structure 120 on the coolant, thereby further improving the heat absorption efficiency of the coolant, and also ensuring the structural strength of the cooling plate 100 to a certain extent. Further, along the extension direction of the flow channel 110, the depth of the transition groove is 10%-60% of the depth of the adjacent turbulence groove. For example, along the extension direction of the flow channel 110, the depth of the transition groove can be 10%, 25%, 45%, or 60% of the depth of the adjacent turbulence groove, etc.

[0053] Optionally, such as Figures 1 to 5 As shown, the turbulence structure 120 includes a first turbulence groove 121, a second turbulence groove 122 and a first transition groove 124. Along the extension direction of the flow channel 110, the first turbulence groove 121, the first transition groove 124 and the second turbulence groove 122 are connected in sequence. Furthermore, the depth b of the second turbulence channel 122 is 1 to 2 times the depth a of the first turbulence channel 121. For example, the depth b of the second turbulence channel 122 can be 1, 1.2, 1.5, or 2 times the depth a of the first turbulence channel 121, etc. The depth d of the first transition channel 124 is 10% to 30% of the depth b of the second turbulence channel 122. For example, the depth d of the first transition channel 124 can be 10%, 25%, or 30% of the depth b of the second turbulence channel 122, etc., with 25% being preferred, so as to maximize the turbulence effect of the turbulence structure 120 on the coolant, thereby improving the heat absorption efficiency of the coolant.

[0054] Optionally, such as Figures 1 to 5As shown, the turbulence structure 120 also includes a second transition groove 125 and a third turbulence groove 123. Along the extension direction of the flow channel 110, the second turbulence groove 122, the second transition groove 125, and the third turbulence groove 123 are sequentially connected. Further, the groove depth c of the third turbulence groove 123 is 1 to 2 times the groove depth b of the second turbulence groove 122. For example, the groove depth c of the third turbulence groove 123 can be 1, 1.2, 1.5, or 2 times the groove depth b of the second turbulence groove 122, etc. The groove depth f of the second transition groove 125 is 30% to 60% of the groove depth c of the third turbulence groove 123. For example, the groove depth f of the second transition groove 125 can be 30%, 50%, or 60% of the groove depth c of the third turbulence groove 123, etc., with 50% being preferred, to maximize the turbulence effect of the turbulence structure 120 on the coolant, thereby improving the heat absorption efficiency of the coolant.

[0055] Optionally, such as Figures 1 to 5 As shown, the depth a of the first turbulence groove 121 is 10%-30% of the radius of the flow channel 110. For example, the depth a of the first turbulence groove 121 can be 10%, 25% or 30% of the radius of the flow channel 110, etc., with 25% being preferred, so as to avoid the problem that the cooling plate 100 is crushed by the coolant due to the excessive depth a of the first turbulence groove 121.

[0056] Optionally, such as Figures 1 to 5 As shown, the cross-section of the turbulence groove is trapezoidal, and the lower base of the trapezoid faces the axial direction of the flow channel 110 to increase the turbulence effect on the coolant. Preferably, the trapezoid is an isosceles trapezoid.

[0057] Optionally, such as Figures 1 to 5 As shown, the angle between the lower base and the waist of the isosceles trapezoid is called the lower base angle. Along the extension direction of the flow channel 110, the lower base angles of at least two turbulence grooves gradually increase. The turbulence effect of the turbulence grooves on the coolant increases with the increase of the lower base angle. Therefore, this structure makes the turbulence effect on the coolant gradually increase when it flows along the extension direction of the flow channel 110, which is beneficial to forming a better turbulence effect in the flow channel 110, thereby improving the heat absorption efficiency of the coolant. Furthermore, the pressure drop generated by the coolant flowing through the turbulence grooves increases with the decrease of the lower base angle. Therefore, this structure has the effect of reducing the pressure drop of the coolant.

[0058] Preferably, such as Figures 1 to 5As shown, the angle between the lower base and the waist of the isosceles trapezoid is the lower base angle. The turbulence structure 120 includes a first turbulence groove 121 and a second turbulence groove 122. Along the extension direction of the flow channel 110, the first turbulence groove 121 and the second turbulence groove 122 are connected in sequence. The lower base angle β of the first turbulence groove 121 is in the range of 15°-45°. For example, the lower base angle β of the first turbulence groove 121 can be 15°, 25°, 30°, 35° or 45°, with 30° being preferred. The lower base angle γ of the second turbulence groove 122 is in the range of 25°-60°. For example, the lower base angle γ of the second turbulence groove 122 can be 25°, 35°, 45°, 50° or 60°, with 45° being preferred. This allows the turbulence structure 120 to have a good turbulence effect on the coolant without causing a large pressure drop loss to the coolant.

[0059] Furthermore, such as Figures 1 to 5 As shown, the turbulence structure 120 also includes a third turbulence groove 123. Along the extension direction of the flow channel 110, the first turbulence groove 121, the second turbulence groove 122 and the third turbulence groove 123 are connected in sequence. The lower bottom angle δ of the third turbulence groove 123 is in the range of 40°-75°. For example, the lower bottom angle δ of the third turbulence groove 123 can be 40°, 50°, 55°, 65° or 75°, etc., with 55° being preferred, to further improve the turbulence effect on the coolant and reduce the pressure drop loss caused to the coolant.

[0060] Optionally, such as Figures 1 to 5 As shown, there are multiple turbulence structures 120, which are arranged sequentially along the extension direction of the flow channel 110 to improve the turbulence effect on the coolant and thus improve the heat absorption efficiency of the coolant.

[0061] Furthermore, such as Figures 1 to 5 As shown, multiple turbulence-disrupting structures 120 are spaced apart along the extension direction of the flow channel 110 to minimize the pressure drop loss of the coolant. Preferably, the spacing h between two adjacent turbulence-disrupting structures 120 is 1mm-5mm. For example, the spacing h between two adjacent turbulence-disrupting structures 120 can be 1mm, 2mm, or 5mm, etc., which can ensure the turbulence effect on the coolant while reducing the impact on the pressure drop of the coolant.

[0062] Optionally, from the inlet to the outlet of the flow channel 110, the inner wall of the flow channel 110 is provided with a turbulence structure 120, so that the coolant can be disturbed by the turbulence structure 120 from the beginning of entering the flow channel 110 to the end of exiting the flow channel 110. This ensures that the coolant can always maintain a turbulent state when flowing in the flow channel 110, which improves the heat absorption efficiency of the cooling plate 100 and also improves the uniformity of the heat absorption efficiency of the cooling plate 100.

[0063] Optionally, such as Figures 1 to 5 As shown, there are multiple flow channels 110. At both ends of the cooling plate 100, there are liquid inlet collectors 200 and liquid outlet collectors 300. Both liquid inlet collectors 200 and liquid outlet collectors 300 are connected to multiple flow channels 110. Coolant enters multiple flow channels 110 through liquid inlet collectors 200, flows along the extension direction of flow channels 110, and then exits flow channels 110 into liquid outlet collectors 300.

[0064] This embodiment also provides a battery pack, which includes a battery box, battery modules, and the aforementioned cooling plate 100. Both the battery modules and the cooling plate 100 are installed inside the battery box. The battery pack utilizes the aforementioned cooling plate 100, which efficiently absorbs the heat generated by the battery cells in the battery modules, reducing the probability of thermal runaway due to overheating and effectively improving the safety of the battery pack.

[0065] Optionally, the battery module includes multiple cells arranged sequentially along a preset direction. The outer wall of the cooling plate 100 is a contoured surface that conforms to the shape of the cells. After the cooling plate 100 and the battery module are assembled into the battery box, the distance between the cooling plate 100 and the cells in the battery module can be minimized as much as possible, thereby improving the heat transfer efficiency between the cooling plate 100 and the cells.

[0066] Optionally, such as Figure 1 As shown, the battery cell is cylindrical, and the outer wall of the cooling plate 100 is continuously wavy. Furthermore, the outer wall of the cooling plate 100 and the outer wall of the battery cell can be either tightly fitted together or have gaps between them, depending on the actual assembly. In this embodiment, the outer wall of the cooling plate 100 and the outer wall of the battery cell are bonded together with thermally conductive adhesive to achieve close contact between the cooling plate 100 and the battery cell, thereby improving the cooling effect of the cooling plate 100 on the battery cell.

[0067] It is understandable that the battery cell can also be a square battery cell. If the battery cell is a square battery cell, then the outer wall of the cooling plate 100 is a flat plate structure.

[0068] Optionally, the shape of the flow channel 110 is adapted to the shape of the outer wall of the cooling plate 100. In this embodiment, the outer wall of the cooling plate 100 is a continuous wave shape, so the shape of the flow channel 110 is also a continuous wave shape, and the bending direction of the flow channel 110 is the same as the bending direction of the outer wall of the cooling plate 100, and the bending angle of the flow channel 110 is the same as the bending angle of the outer wall of the cooling plate 100, so as to shorten the distance between the coolant and the battery cell in the flow channel 110 and improve the effect of the coolant absorbing the heat of the battery cell.

[0069] It should be noted that the extension direction of the aforementioned flow channel 110 is... Figure 4 and Figure 5 The direction from left to right in the middle.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cooling plate, characterized in that, The cooling plate has a flow channel (110) and coolant flows through the flow channel (110). The inner wall of the flow channel (110) is provided with a turbulence structure (120). The turbulence structure (120) is a spiral groove that extends along the extension direction of the flow channel (110) and is coaxial with the flow channel (110). The number of the turbulence structures (120) is multiple, and the multiple turbulence structures (120) are arranged sequentially along the extension direction of the flow channel (110); The turbulence structure (120) includes at least two turbulence grooves, the at least two turbulence grooves are connected, and the groove depths of the at least two turbulence grooves are different from each other; The cross-section of the turbulence channel is trapezoidal, and the lower base of the trapezoid faces the axial direction of the flow channel (110); The angle between the lower base and the waist of the trapezoid is the lower base angle. Along the extension direction of the flow channel (110), the lower base angle of at least two of the turbulence channels gradually increases, and the trapezoid is an isosceles trapezoid.

2. The cooling plate according to claim 1, characterized in that, Along the extension direction of the flow channel (110), the depth of at least two of the turbulence grooves gradually increases.

3. The cooling plate according to claim 1, characterized in that, Along the extension direction of the flow channel (110), in two adjacent turbulence channels, the depth of the latter turbulence channel is 1 to 2 times the depth of the former turbulence channel, but not equal to 1.

4. The cooling plate according to claim 1, characterized in that, The turbulence structure (120) further includes at least one transition groove, and two adjacent turbulence grooves are connected through the transition groove. Along the extension direction of the flow channel (110), the depth of the transition groove is less than the depth of the turbulence groove adjacent to the transition groove.

5. The cooling plate according to claim 4, characterized in that, Along the extension direction of the flow channel (110), the depth of the transition groove is 10%-60% of the depth of the turbulence groove adjacent to the transition groove.

6. The cooling plate according to claim 1, characterized in that, The turbulence structure (120) includes a first turbulence groove (121), a second turbulence groove (122), and a first transition groove (124). Along the extension direction of the flow channel (110), the first turbulence groove (121), the first transition groove (124), and the second turbulence groove (122) are connected in sequence.

7. The cooling plate according to claim 6, characterized in that, The depth d of the first transition groove (124) is 10%-30% of the depth b of the second turbulence groove (122).

8. The cooling plate according to claim 6, characterized in that, The turbulence structure (120) further includes a second transition groove (125) and a third turbulence groove (123). Along the extension direction of the flow channel (110), the second turbulence groove (122), the second transition groove (125) and the third turbulence groove (123) are connected in sequence.

9. The cooling plate according to claim 8, characterized in that, The depth f of the second transition groove (125) is 30%-60% of the depth c of the third turbulence groove (123).

10. The cooling plate according to claim 6, characterized in that, The groove depth a of the first turbulence groove (121) is 10%-30% of the radius of the flow channel (110).

11. The cooling plate according to claim 1, characterized in that, The angle between the lower base and the waist of the isosceles trapezoid is the lower base angle. The turbulence structure (120) includes a first turbulence groove (121) and a second turbulence groove (122). Along the extension direction of the flow channel (110), the first turbulence groove (121) and the second turbulence groove (122) are connected in sequence. The lower base angle β of the first turbulence groove (121) is in the range of 15°-45°, and the lower base angle γ of the second turbulence groove (122) is in the range of 25°-60°.

12. The cooling plate according to claim 11, characterized in that, The turbulence structure (120) further includes a third turbulence groove (123). Along the extension direction of the flow channel (110), the first turbulence groove (121), the second turbulence groove (122), and the third turbulence groove (123) are connected in sequence. The lower bottom angle δ of the third turbulence groove (123) is in the range of 40°-75°.

13. The cooling plate according to claim 1, characterized in that, Multiple of the aforementioned turbulence structures (120) are spaced apart along the extension direction of the flow channel (110).

14. The cooling plate according to claim 13, characterized in that, The spacing h between two adjacent perturbation structures (120) is 1mm-5mm.

15. The cooling plate according to any one of claims 1-12, characterized in that, The flow channel (110) has a turbulence structure (120) on its inner wall from the inlet to the outlet.

16. A battery pack, characterized in that, It includes a battery box, a battery module, and a cooling plate (100) as described in any one of claims 1-14, wherein the battery module and the cooling plate (100) are both installed inside the battery box.

17. The battery pack according to claim 16, characterized in that, The battery module includes multiple battery cells arranged sequentially along a preset direction. The outer wall of the cooling plate (100) is a contoured surface that conforms to the shape of the battery cells.

18. The battery pack according to claim 17, characterized in that, The battery cell is a cylindrical battery cell, and the outer wall of the cooling plate (100) is a continuous wave shape.

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