Power battery liquid cooling heat dissipation device with bionic sharkskin runner structure

Abstract

A power battery liquid cooling heat dissipation device with a bionic sharkskin flow channel structure belongs to the field of power battery cooling, and comprises a cover plate, a substrate and a cooling liquid flow channel arranged on the substrate, the cover plate and the substrate are connected to form a liquid cooling plate, and the cooling liquid flow channel is a groove arranged on the substrate. The sharkskin is covered with placoid scales, a single shark placoid scale is rhombic, grooves and ribs are distributed on the outer surface of the single shark placoid scale, a cooling liquid flow channel is divided into a plurality of rhombic flow channels, namely single rhombic areas, the rhombic flow channels imitate the rhombus of the shark placoid scales, a plurality of straight flow channels penetrate through the rhombic flow channels, and the straight flow channels imitate the groove structures of the placoid scales. The ribs of the placoid scales are imitated at the parts which are not penetrated by the straight flow channels, and the ribs and the grooves are distributed in a staggered manner, so that the cooling liquid flow channels imitate the placoid scales of the sharkskin, the resistance of water flow can be effectively reduced, the flowing efficiency of fluid is improved, the heat dissipation performance is further improved, and the radiator is simple in structure, convenient to process, low in cost and suitable for popularization.

Description

Technical Field

[0001] The invention belongs to the field of power battery cooling, and in particular to a power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure. Background Art

[0002] With the rapid development of electric vehicles and renewable energy storage systems, the energy density and efficiency of power batteries are constantly improving. However, the battery will generate a lot of heat during the charging and discharging process, which not only affects the working efficiency of the battery, but also may reduce the battery life and even cause safety problems. Therefore, the heat dissipation problem of the battery has become a key problem in the technical research and development of electric vehicles and related application fields.

[0003] Traditional battery cooling systems mostly use air cooling or liquid cooling technology. The air cooling system usually has a simpler structure, but the heat dissipation efficiency is low, and it is difficult to control local overheating. The liquid cooling system removes the heat generated by the battery through circulating coolant, which usually provides better heat dissipation effect. Especially in high power density applications, the advantages of liquid cooling technology are more obvious. However, the liquid cooling system still faces some challenges in practical applications. The flow channel structure of the traditional liquid cooling system has problems such as uneven coolant flow, excessive flow resistance, and unsatisfactory heat dissipation efficiency, which leads to overheating of the power battery and reduced life, posing a challenge to the safety of the power battery. The existing bionic structure flow channel has a complex structure and difficult processing, which greatly increases the manufacturing cost of the liquid cooling system.

[0004] Therefore, designing a power battery liquid cooling device that can economically and effectively improve the fluid flow performance of the liquid cooling system, optimize the heat dissipation efficiency, and reduce energy loss has become an urgent need in current technological development. Summary of the invention

[0005] The present invention provides a power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure, so as to solve the defects in the prior art.

[0006] The present invention is achieved through the following technical solutions: A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure comprises a cover plate, a base and a coolant flow channel arranged on the base, the cover plate and the base are connected to form a liquid cooling plate, the coolant flow channel is a groove opened on the base, and comprises a bionic shark skin flow channel, a coolant inlet and a coolant outlet; the bionic shark skin flow channel comprises a straight flow channel and an oblique flow channel, the oblique flow channels are staggered to form a uniformly distributed single rhombus area, and the straight flow channel runs through the single rhombus area.

[0007] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, the included angle between two intersecting said inclined flow channels is ɑ, the spacing between the parallel inclined flow channels on the same side is equal, the single diamond region is the smallest diamond region formed by the intersecting inclined flow channels, and there are N straight flow channels arranged in the single diamond region.

[0008] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, the coolant inlet is located at the midpoint of the front end of the base, a cross flow channel perpendicular to the straight flow channel is provided at the coolant inlet, and the cross flow channel and the intersecting inclined flow channels form a triangular region; similarly, the coolant outlet is located at the midpoint of the rear end of the base, a cross flow channel perpendicular to the straight flow channel is also provided at the coolant outlet, and this cross flow channel and the intersecting inclined flow channels also form a triangular region.

[0009] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, the cover plate, the base and the coolant flow channels form a liquid cooling and heat dissipation device, and single batteries are arranged on both sides of the liquid cooling and heat dissipation device.

[0010] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, spoiler fins are fixedly arranged on the side walls of the straight flow channels and the inclined flow channels.

[0011] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, several coolant inlets and coolant outlets are respectively arranged on the base; several coolant inlets in the same row are connected in series through a coolant inlet pipeline, the coolant outlets in the same row are connected in series through a coolant outlet pipeline, and electromagnetic valves are respectively arranged on the coolant inlet pipeline and the coolant outlet pipeline.

[0012] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, the bionic shark skin flow channels are provided with different graded flow channels according to the heat dissipation efficiency, and the graded flow channels are, in ascending order of heat dissipation efficiency, the first - level bionic shark skin diamond flow channel, the second - level bionic shark skin diamond flow channel, the third - level bionic shark skin diamond flow channel, and the N - level bionic shark skin diamond flow channel.

[0013] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, the graded flow channels are realized by changing the spacing of the inclined flow channels.

[0014] A power battery liquid cooling and heat dissipation device with a bionic shark skin flow channel structure as described above, heat conducting fins are arranged in the straight flow channels.

[0015] As described above, a power battery liquid cooling heat dissipation device with a bionic shark skin flow channel structure is provided with a slot corresponding to the heat-conducting fin on the base, and a hinge shaft is inserted and fitted in the slot, the hinge shaft is fixedly connected to the heat-conducting fin, the top side of the heat-conducting fin is in sliding contact with the cover plate, and the hinge shaft is located at one end of the heat-conducting fin facing the coolant inlet.

[0016] The advantages of the present invention are: shark skin is covered with shield scales, a single shark shield scale is rhombus-shaped, and grooves and ribs are distributed on its outer surface. The oblique flow channel in the present device divides the coolant flow channel into several rhombus-shaped flow channels - single rhombus areas, the rhombus-shaped flow channel imitates the rhombus of shark shield scales, several straight flow channels penetrate the rhombus flow channel, the straight flow channel imitates the groove structure of the shield scales, and the part not penetrated by the straight flow channel imitates the ribs of the shield scales, the ribs and the grooves are staggered, so that the coolant flow channel imitates the shield scales of shark skin, which can effectively reduce the resistance of water flow, improve the flow efficiency of the fluid, and thus improve the heat dissipation performance, and the structure is simple, the processing is convenient, the cost is low, and it is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the base structure; Figure 3 is a schematic diagram of the three-dimensional structure of the coolant flow channel; Figure 4 This is a schematic diagram of the local structure of the bionic shark skin flow channel; Figure 5 It is a schematic diagram of the local structure of the coolant outlet flow channel and the coolant inlet flow channel; Figure 6a It is a structural schematic diagram of the test unit of the embodiment; Figure 6b Schematic diagram of flow channel structure of two configurations of the embodiment; Figure 6c A comparison diagram of simulation results of flow channel structures of two configurations in the embodiment; Figure 7 It is a partial enlarged view of the groove structure of the coolant flow channel; Figure 8a It is a schematic diagram of the coolant flow channel structure with multiple inlets and outlets for the coolant; Figure 8b It is a schematic diagram of the assembly structure of the coolant heat dissipation device and the battery module; Figure 9a Schematic diagram of the rhombic flow channel structure of the secondary bionic shark skin Figure 9b Schematic diagram of the rhombic flow channel structure of the tertiary bionic shark skin Figure 10a Schematic diagram of the three - dimensional connection structure between the heat - conducting fin and the substrate Figure 10b Schematic diagram of the connection structure between the heat - conducting fin and the substrate Figure 10c Top view and right view of the heat - conducting fin

[0019] Reference numerals: 1. Cover plate, 2. Coolant flow channel, 3. Substrate, 4. Coolant inlet, 5. Coolant outlet, 6. Bionic shark skin flow channel, 7. Installation position, 8. Straight flow channel, 9. Oblique flow channel, 10. Single - rhombus area, 11. Cross - flow channel, 12. Triangular area, 13. Single cell, 14. Liquid - cooled heat dissipation device, 15. Turbulence fin, 16. Coolant inlet pipe, 17. Coolant outlet pipe, 18. Solenoid valve, 19. Primary bionic shark skin rhombic flow channel, 20. Secondary bionic shark skin rhombic flow channel, 21. Tertiary bionic shark skin rhombic flow channel, 22. Heat - conducting fin, 23. Slot, 24. Hinge shaft Detailed implementation mode

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention

[0021] A power battery liquid - cooled heat dissipation device with a bionic shark skin flow channel structure, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6a , Figure 6b , Figure 6c , Figure 7 , Figure 8a , Figure 8b , Figure 9a , Figure 9b , Figure 10a , Figure 10b , Figure 10cAs shown, it includes a cover plate 1, a base 3 and a coolant flow channel 2 arranged on the base 3. The cover plate 1 is connected to the base 3 to form a liquid cooling plate. The cover plate 1 and the base 3 can be fixedly connected or detachably connected. Reserved installation positions 7 are provided at the four corners of the base 3. When the base 3 and the cover plate 1 are detachably connected, a mounting hole is opened on the reserved installation position 7, and a mounting groove is also opened on the cover plate 1. The mounting holes and the mounting grooves correspond to each other one by one. Bolts are used to pass through the mounting grooves and the mounting holes to fasten the cover plate 1 and the base 3 together, and high-temperature resistant sealant is applied to the adjacent sides of the base 3 and the cover plate 1 to increase the sealing of the connection between the cover plate 1 and the base 3. In this embodiment, the cover plate 1 and the base 3 are fixedly connected together by welding. The cover plate 1 and the base 3 are both made of metal materials with good thermal conductivity. In this embodiment, they are all metal aluminum. The coolant flow channel 2 is a groove opened on the base 3, including a bionic shark skin flow channel 6, a coolant inlet 4 and a coolant outlet 5, the bionic shark skin flow channel 6 is located on the top side of the base 3, the coolant inlet 4 and the coolant outlet 5 are located on two opposite sides of the base 3, one end of the bionic shark skin flow channel 6 is connected with the coolant inlet 4, and the other end is connected with the coolant outlet 5, the cover plate 1 covers the groove to form a coolant flow channel 2, when the coolant flows through the coolant flow channel 2, it first enters the bionic shark skin flow channel 6 located in the middle of the flow channel from the coolant inlet 4 located at the front end of the flow channel, and then flows out through the coolant outlet 5 located at the rear end of the flow channel; the bionic shark skin flow channel 6 includes a straight flow channel 8 and an oblique flow channel 9, which effectively reduces the complexity of the bionic structure flow channel, the oblique flow channels 9 are staggered to form a uniformly distributed single rhombus area 10, the straight flow channel 8 runs through the single rhombus area 10, the two ends of the straight flow channel 8 are connected to the two oblique flow channels 9, the straight flow channel 8 is a diversion of the oblique flow channel 9, the flow resistance of the coolant can be effectively reduced by diversion, and the heat exchange area can be increased to improve the uniformity of heat exchange. Shark skin is covered with shield scales, and a single shark shield scale is diamond-shaped, with grooves and ribs distributed on its outer surface. The oblique flow channel 9 in the present device divides the coolant flow channel 2 into several diamond-shaped flow channels - single diamond-shaped areas 10. The diamond-shaped flow channel imitates the diamond shape of shark shield scales, and several straight flow channels 8 penetrate the diamond-shaped flow channel. The straight flow channel 8 imitates the groove structure of the shield scales, and the part not penetrated by the straight flow channel 8 imitates the ribs of the shield scales. The ribs and the grooves are staggered, so that the coolant flow channel 2 imitates the shield scales of shark skin, which can effectively reduce the resistance of water flow, improve the flow efficiency of the fluid, and thus improve the heat dissipation performance. In addition, the structure is simple, the processing is convenient, the cost is low, and it is suitable for promotion.

[0022] Specifically, if Figure 4As shown, the included angle between the two staggered diagonal channels 9 in this embodiment is ɑ, where ɑ is 126.87° in this embodiment. The distances between the parallel diagonal channels 9 on the same side are equal, and the distance is 18.5 mm in this embodiment. The single diamond region 10 is the smallest diamond region formed by the staggered diagonal channels 9. There are N straight channels 8 in the single diamond region 10, where N is 5 in this embodiment, and they are symmetrically distributed within the single diamond region 10 with a distance of 8 mm. This improves the flow characteristics of the coolant and enhances the efficiency of the heat dissipation system.

[0023] Specifically, as Figure 5 shown, the coolant inlet 4 in this embodiment is located at the midpoint of the front end of the base 3. A cross-channel 11 perpendicular to the straight channel 8 is provided at the coolant inlet 4, and the cross-channel 11 and the staggered diagonal channels 9 form a triangular region 12. Similarly, the coolant outlet 5 is located at the midpoint of the rear end of the base 3, and a cross-channel 11 perpendicular to the straight channel 8 is also provided at the coolant outlet 5, and this cross-channel 11 and the staggered diagonal channels 9 also form a triangular region 12. This can enhance the uniformity of heat dissipation at the inlet and outlet of the coolant, and further improve the temperature uniformity of the power battery.

[0024] Furthermore, as Figure 6a and Figure 6b shown, the cover plate 1, the base 3, and the coolant flow channel 2 in this embodiment form a liquid-cooled heat dissipation device 14. Single cells 13 are arranged on both sides of the liquid-cooled heat dissipation device 14. According to the actual size parameters, physical property parameters of the power battery, and the actual heat dissipation requirements of the battery heat generation rate, two single cells 13 in the battery module are selected as the test units. The capacity of the single cell 13 is 30 Ah, the size parameters are 150 mm × 150 mm × 9 mm, the discharge rate is 2C, and the volume heat generation rate is 54531 W / m³. The thickness of the cover plate 1 is 1 mm, the thickness of the base 3 is 3 mm, the depth of the coolant flow channel 2 is 2 mm, and the width is 2 mm. Under the same flow channel structure parameters, numerical simulation comparisons are carried out using Figure 6b Configuration I - the traditional parallel flow channel liquid-cooled heat dissipation device and Configuration II - the biomimetic shark skin flow channel liquid-cooled heat dissipation device of this device; the flow channel heat transfer area of Configuration I is 7692 mm², the number N of the straight channels 8 in the single diamond region 10 of Configuration II is 3, and its heat transfer area is 7147.67 mm²; According to Figure 6cIn the comparison results, compared with Configuration I, the average pressure drop, maximum temperature, average temperature, and maximum temperature difference of Configuration II are all lower, which proves that the device has a more efficient heat exchange effect and can significantly reduce the maximum temperature and average temperature of the power battery. Since the coolant flow channels provided are straight channels 8 and inclined channels 9, the flow channel structure is simple. Compared with the existing bionic flow channels, the processing difficulty and cost are greatly reduced; the number N of straight channels and the flow channel size parameters within the single diamond-shaped region can select more suitable parameters according to the actual working conditions, and the machining processability is more prominent.

[0025] Furthermore, as Figure 7 shown, in the case of high heat exchange, turbulator fins 15 are fixedly provided on the side walls of the straight channels 8 and inclined channels 9 of this embodiment. The turbulator fins 15 are evenly distributed on the side walls of the flow channels in the single diamond-shaped region 10; the cross-sectional shape of the turbulator fins 15 can be limited to a circle, a sector, a water droplet shape, or a polygon according to the actual processing conditions and heat dissipation requirements. In this embodiment, the cross-section of the turbulator fins 15 is a circle. The turbulator fins 15 can enhance the heat exchange effect and improve the heat exchange efficiency.

[0026] Furthermore, as Figure 8a and Figure 8b shown, several coolant inlets 4 and coolant outlets 5 on the base 3 of this embodiment are respectively provided. In actual application, the number of coolant inlets and outlets can be set according to the heat dissipation requirements and the structure of the liquid cooling plate. In this embodiment, three coolant inlets 4 and three coolant outlets 5 are respectively provided, so three coolant inlet pipes 16 and three coolant outlet pipes 17 are also respectively provided to enhance the heat exchange capacity of the liquid cooling and heat dissipation device 14; several coolant inlets 4 in the same row are connected in series through the coolant inlet pipe 16, and the coolant outlets 5 in the same row are connected in series through the coolant outlet pipe 17. Solenoid valves 18 are respectively provided on the coolant inlet pipe 16 and the coolant outlet pipe 17. The coolant enters the coolant inlet 4 through the coolant inlet pipe 16, flows through the bionic shark skin flow channel 6 and then is discharged through the coolant outlet 5 and flows into the coolant outlet pipe 17. By controlling the solenoid valve 18, the flow rate of the coolant can be controlled under different heat exchange requirements.

[0027] Furthermore, as Figure 9a and Figure 9bAs shown in the figure, to solve the problem of excessive local temperature at the coolant outlet 5, the bionic shark skin flow channel 6 in this embodiment is provided with different graded flow channels according to the heat dissipation efficiency. The graded flow channels are, in ascending order of heat dissipation efficiency, the first-level bionic shark skin diamond flow channel 19, the second-level bionic shark skin diamond flow channel 20, the third-level bionic shark skin diamond flow channel 21, and the N-level bionic shark skin diamond flow channel. In this embodiment, the schematic plan views of the first-level bionic shark skin diamond flow channel 19, the second-level bionic shark skin diamond flow channel 20, and the third-level bionic shark skin diamond flow channel 21 are given. The coolant flows into the second-level bionic shark skin diamond flow channel 20 through the first-level bionic shark skin diamond flow channel 19, increasing the heat exchange area of the coolant and enhancing the heat exchange of the part of the coolant outlet 5, thereby reducing the temperature difference of the battery; the graded flow channel design can set the number of grades according to the battery heat dissipation requirements. Figure 9b The schematic plan view with the structure of the third-level bionic shark skin diamond flow channel 21 is given.

[0028] Furthermore, as Figure 9a and Figure 9b shown, the graded flow channels in this embodiment are realized by changing the spacing of the inclined flow channels 9. Specifically, when the battery discharge rate is 2C, the liquid cooling heat dissipation device 14 with the second-level bionic shark skin diamond flow channel 20 as shown in Figure 9a can be adopted. The base 3 is divided into two parts with equal upper and lower areas. The upper part is the first-level bionic shark skin diamond flow channel 19 connected to the coolant inlet 4, and the lower part is the second-level bionic shark skin diamond flow channel 20 connected to the coolant outlet 5; if the spacing of the inclined flow channels 9 in the part of the first-level bionic shark skin diamond flow channel 19 is D, then the spacing of the inclined flow channels 9 in the part of the second-level bionic shark skin diamond flow channel 20 is D / 2. When the battery discharge rate is 3C, the liquid cooling heat dissipation device 14 with the third-level bionic shark skin diamond flow channel 21 as shown in Figure 9b can be adopted. The base 3 is divided into three parts with equal upper, middle, and lower areas. The upper part is the first-level bionic shark skin diamond flow channel 19 connected to the coolant inlet 4, the middle part is the second-level bionic shark skin diamond flow channel 20, and the lower part is the third-level bionic shark skin diamond flow channel 21 connected to the coolant outlet 5; if the spacing of the inclined flow channels 9 in the part of the first-level bionic shark skin diamond flow channel 19 is D, then the spacing of the inclined flow channels 9 in the part of the second-level bionic shark skin diamond flow channel 20 is D / 2, and the spacing of the inclined flow channels 9 in the part of the third-level bionic shark skin diamond flow channel 21 is D / 4.

[0029] Furthermore, as Figure 10a , Figure 10b and Figure 10c shown, heat conducting fins 22 are provided in the straight flow channel 8 in this embodiment. Figure 10bAre the three views of the heat-conducting fin 22. Further, the thickness of the heat-conducting fin 22 is generally selected according to the width of the flow channel, and the shapes of its two ends are generally sharp corners and rounded corners. In this embodiment, they are rounded corners. The heat-conducting fins 22 are evenly arranged in the straight flow channels 8 within the single-rhombus region 10. The fin length is selected according to the length of the shortest straight flow channel 8 within the single-rhombus region 10 of each stage of the bionic shark-skin rhombic flow channel and is less than the shortest straight flow channel 8. By increasing the heat-conducting fins 22, the heat transfer between the coolant and the liquid-cooling plate is enhanced, enabling the present invention to be applicable to the heat dissipation of high-output thermal batteries with higher discharge rates.

[0030] Furthermore, as Figure 10a , Figure 10b and Figure 10c shown, in this embodiment, slots 23 are opened on the base 3 corresponding to the heat-conducting fins 22. The slots 23 are located on the bottom side of the straight flow channels 8. An articulated shaft 24 is inserted and fitted in the slots 23. The articulated shaft 24 can rotate within the corresponding slots 23 and can be pulled out of the slots 23. Moreover, the outer periphery of the articulated shaft 24 is in sliding contact and fit with the inner periphery of the slots 23. The articulated shaft 24 is coaxially arranged with the slots 23. The articulated shaft 24 is fixedly connected to the heat-conducting fin 22. The top side of the heat-conducting fin 22 is in sliding contact and fit with the cover plate 1 to prevent the articulated shaft 24 from falling out of the slots 23. The articulated shaft 24 is located at one end of the heat-conducting fin 22 facing the coolant inlet 4. The axis of the articulated shaft 24 is coaxially arranged with the rounded corner at the end of the heat-conducting fin 22. The heat-conducting fin 22 is articulated on the base 3 through the cooperation of the slots 23 and the articulated shaft 24. The heat-conducting fin 22 can rotate along the axis of the articulated shaft 24 within the straight flow channel 8. After the cover plate 1 is removed from the base 3, the articulated shaft 24 can be pulled out of the slots 23. The structure is simple, convenient for processing and installation. When the coolant flows through the straight flow channel 8, the heat-conducting fin 22 divides the coolant, increasing the turbulence of the coolant. The disturbance of the turbulence can destroy the thermal boundary layer, thereby improving the heat transfer efficiency. Under the impact of the turbulent coolant, the heat-conducting fin 22 swings along the articulated shaft 24, further increasing the turbulence of the coolant.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A liquid-cooled heat dissipation device for a power battery with a bionic shark skin flow channel structure, comprising a cover plate (1), a base (3), and a coolant flow channel (2) provided on the base (3). The cover plate (1) is connected to the base (3) to form a liquid-cooled plate, and is characterized in that: The coolant flow channel (2) is a groove formed on the base (3), and includes a biomimetic shark skin flow channel (6), a coolant inlet (4), and a coolant outlet (5); the biomimetic shark skin flow channel (6) includes a straight flow channel (8) and an inclined flow channel (9), and the inclined flow channels (9) intersect with each other to form a uniformly distributed single diamond region (10), and the straight flow channel (8) penetrates through the single diamond region (10).

2. The liquid cooling and heat dissipation device for a power battery with a bionic shark skin flow channel structure according to claim 1, characterized in that: The included angle between two intersecting inclined flow channels (9) is ɑ, the spacing between the parallel inclined flow channels (9) on the same side is equal, the single diamond region (10) is the smallest diamond region formed by the intersecting inclined flow channels (9), and N straight flow channels (8) are provided in the single diamond region (10).

3. A liquid-cooled heat dissipation device for a power battery with a bionic shark skin flow channel structure according to claim 1, characterized in that: The coolant inlet (4) is located at the midpoint of the front end of the base (3), a cross flow channel (11) perpendicular to the straight flow channel (8) is provided at the coolant inlet (4), and the cross flow channel (11) and the intersecting inclined flow channels (9) form a triangular region (12); similarly, the coolant outlet (5) is located at the midpoint of the rear end of the base (3), and a cross flow channel (11) perpendicular to the straight flow channel (8) is also provided at the coolant outlet (5), and this cross flow channel (11) and the intersecting inclined flow channels (9) also form a triangular region (12).

4. A liquid-cooling heat dissipation device for a power battery with a bionic shark skin flow channel structure according to claim 1, characterized in that: The cover plate (1), the base (3), and the coolant flow channel (2) form a liquid cooling heat dissipation device (14), and single cells (13) are arranged on both sides of the liquid cooling heat dissipation device (14).

5. The liquid cooling and heat dissipation device for a power battery with a bionic shark skin flow channel structure according to claim 1, characterized in that: Turbulence fins (15) are fixedly provided on the side walls of the straight flow channel (8) and the inclined flow channel (9).

6. The liquid cooling and heat dissipation device for power battery with a bionic shark skin flow channel structure according to claim 1, characterized in that: A plurality of coolant inlets (4) and coolant outlets (5) are respectively provided on the base (3); several coolant inlets (4) in the same row are connected in series through a coolant inlet pipe (16), several coolant outlets (5) in the same row are connected in series through a coolant outlet pipe (17), and solenoid valves (18) are respectively provided on the coolant inlet pipe (16) and the coolant outlet pipe (17).

7. The liquid cooling and heat dissipation device for power battery with a biomimetic shark skin flow channel structure according to claim 1, characterized in that: The biomimetic shark skin flow channel (6) is provided with different graded flow channels according to the heat dissipation efficiency, and the graded flow channels are, in order of increasing heat dissipation efficiency, a first-level biomimetic shark skin diamond flow channel (19), a second-level biomimetic shark skin diamond flow channel (20), a third-level biomimetic shark skin diamond flow channel (21), and an N-level biomimetic shark skin diamond flow channel.

8. The liquid-cooling heat dissipation device for power battery with a bionic shark skin flow channel structure according to claim 7, wherein: The graded flow channels are realized by changing the spacing of the inclined flow channels (9).

9. The liquid-cooling heat dissipation device for a power battery with a bionic shark skin flow channel structure according to claim 1, wherein: Heat conduction fins (22) are provided in the straight flow channel (8).

10. A liquid cooling and heat dissipation device for a power battery with a biomimetic shark skin flow channel structure according to claim 1, characterized in that: Slots (23) are formed on the base (3) corresponding to the heat conduction fins (22), hinge shafts (24) are inserted and fitted in the slots (23), the hinge shafts (24) are fixedly connected to the heat conduction fins (22), the top side of the heat conduction fins (22) is in sliding contact with the cover plate (1), and the hinge shafts (24) are located at one end of the heat conduction fins (22) facing the coolant inlet (4).

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