Heat dissipation system and battery pack

Abstract

The utility model provides a heat dissipation system and battery pack, the heat dissipation system comprises a heat dissipation plate and an air cooling pipe, one side surface of the heat dissipation plate is used for placing a battery module and exchanging heat with the battery module, a first flow channel and a second flow channel are arranged in the heat dissipation plate, the first flow channel is used for circulation of cooling liquid, and the second flow channel is used for circulation of airflow. Heat exchange is carried out between the first flow channel and the second flow channel; the air cooling pipe is used for surrounding the side part, deviating from the heat dissipation plate, of the battery module and the other two opposite side parts, the two end parts of the air cooling pipe are respectively connected to the heat dissipation plate, and the interior of the air cooling pipe is communicated with the second flow channel to jointly form an air cooling channel.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely relates to a heat dissipation system and battery pack. BACKGROUND

[0002] At present, in the energy storage battery, the heat dissipation mode mainly concentrates in liquid cooling and air cooling. The air cooling system passes through forced convection to transfer heat, is suitable for fast heat dissipation and simple maintenance application. The liquid cooling system utilizes liquid circulation to take away heat, can usually provide higher heat exchange efficiency and better temperature control, is suitable for high temperature or high power density environment. The heat dissipation system of the related technology sets up air cooling system and liquid cooling system simultaneously to dissipate heat, can automatically adjust cooling mode under different working conditions, ensures that the battery always operates in the optimum temperature range;But the combination of air cooling system and liquid cooling system makes the heat dissipation system structure complex, and the components increase. CONTENT OF UTILITY MODEL

[0003] The embodiment of the utility model provides a kind of heat dissipation system and battery pack, can improve the technical problem of heat dissipation system structure complex.

[0004] First, the embodiment of the utility model provides a kind of heat dissipation system, comprising:

[0005] The side surface of the heat dissipation plate is used for the battery module to rest, and exchanges heat with the battery module, first flow channel and second flow channel are arranged in the heat dissipation plate, the first flow channel is used for cooling liquid to flow, the second flow channel is used for air flow to flow, and the first flow channel and the second flow channel exchange heat;And,

[0006] The air cooling pipe is surrounded by the side of the battery module away from the heat dissipation plate and the other two opposite sides, the two ends of the air cooling pipe are connected to the heat dissipation plate respectively, the inside of the air cooling pipe is communicated with the second flow channel, and forms air cooling channel together.

[0007] In an embodiment, the air cooling pipe is provided with air inlet opposite the battery module, and the air inlet is provided with fan;

[0008] The heat dissipation plate is provided with air outlet communicated with the second flow channel.

[0009] In an embodiment, the heat dissipation system further includes a heat conduction assembly, the heat conduction assembly includes a heat conduction plate and a heat dissipation fin, the heat conduction plate is arranged on the side of the battery module, the heat dissipation fin is arranged on the side surface of the heat conduction plate away from the battery module, and the heat dissipation fin is arranged opposite the air inlet;

[0010] The central axis of the fan is arranged to cross the surface of the heat conduction plate.

[0011] In an embodiment, the heat conduction assembly further comprises a vapor chamber, which is arranged between two adjacent battery cells in the battery module, and is in thermal contact with the heat conduction plate for heat conduction.

[0012] In an embodiment, the heat dissipation system comprises a plurality of heat conduction assemblies arranged side by side, each of which is used for a corresponding group of battery cells.

[0013] In an embodiment, the heat dissipation plate is provided with a hot air inlet and an air outlet communicating with the second flow channel, and the hot air inlet is in communication with the inside of the air cooling pipe;

[0014] A plurality of flow guides are arranged in the second flow channel, and the plurality of flow guides are arranged side by side and configured in the extension direction of the flow guides from the hot air inlet to the cold air outlet.

[0015] In an embodiment, the first flow channel and the second flow channel are arranged side by side in the thickness direction of the heat dissipation plate, and the first flow channel is located on the side of the second flow channel close to the battery module, and the orthographic projection of the first flow channel on the heat dissipation plate covers the orthographic projection of the battery module on the heat dissipation plate.

[0016] In an embodiment, the heat dissipation plate comprises a first plate and a second plate arranged in a stack in the thickness direction thereof, one side surface of the second plate is provided with a groove, and the first plate is located in the slot of the groove and is arranged in a spaced manner with the bottom wall of the groove to jointly form the second flow channel, and the first flow channel is formed in the first plate.

[0017] In an embodiment, the first plate is provided with a first opening and a second opening communicating with the groove, the first opening is arranged as the hot air inlet of the second flow channel, and the second opening is arranged as the cold air outlet of the second flow channel.

[0018] The two ends of the air cooling pipe are respectively connected to the first plate, and the inside thereof is in communication with the first opening.

[0019] In an embodiment, the peripheral side wall of the first plate is partially recessed compared to the peripheral side wall of the second plate to form a plurality of openings communicating with the second flow channel, and the plurality of openings are distributed along the peripheral side of the first plate, wherein the two opposite openings are arranged as the first opening, and the remaining openings are arranged as the second opening.

[0020] The two ends of the air cooling pipe are respectively inserted into the two opposite openings.

[0021] In an embodiment, two of the openings are located on opposite sides of the first plate in a first direction, and the remaining openings are located on one side of the first plate in a second direction, the first direction and the second direction being arranged in a cross manner.

[0022] In an embodiment, the heat dissipation plate further comprises a plurality of flow guide ribs protruding from the bottom wall of the groove, the plurality of flow guide ribs being arranged side by side, the extension direction of the flow guide ribs being arranged from the first opening to the second opening, and the end of the flow guide ribs being flush with the groove opening of the groove.

[0023] In an embodiment, the first plate is placed on the ends of the plurality of flow guide ribs.

[0024] In an embodiment, the extension path of the flow guide ribs is arranged in an arc shape from the first opening to the second opening.

[0025] In an embodiment, one side surface of the heat dissipation plate is provided with a liquid inlet and a liquid outlet communicating with the first flow channel.

[0026] The heat dissipation system further comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe being arranged on one side surface of the heat dissipation plate, one end of the liquid inlet pipe being communicated with the liquid inlet, and one end of the liquid outlet pipe being communicated with the liquid outlet.

[0027] In an embodiment, the first flow channel comprises a first flow section, a second flow section, and a third flow section, the first flow section and the second flow section being arranged side by side in a first direction and extending along a second direction, and the two ends of the same side of the first flow section and the second flow section being communicated by the third flow section.

[0028] The liquid inlet and the liquid outlet are arranged on the same side and are respectively communicated with the other two ends of the same side of the first flow section and the second flow section.

[0029] In an embodiment, two first flow channels are arranged in the heat dissipation plate, and in the first direction, the two first flow channels are symmetrically distributed along the central axis of the heat dissipation plate.

[0030] In an embodiment, two first flow sections of the two first flow channels are arranged adjacent to each other, the liquid inlet is communicated with the ends of the two first flow sections, and the liquid outlet is provided with two liquid outlets and is respectively communicated with the ends of the two second flow sections.

[0031] In an embodiment, the air-cooled pipe is arranged around the battery module on the side of the battery module away from the heat dissipation plate and on the two sides opposite in the first direction.

[0032] The heat dissipation system comprises at least two air-cooled pipes, and the two air-cooled pipes are arranged side by side in the second direction.

[0033] In a second aspect, the embodiments of the utility model provide a battery pack, including:

[0034] The heat dissipation system described above; and,

[0035] The battery module is arranged on one side surface of the heat dissipation plate of the heat dissipation system.

[0036] In an embodiment, the battery pack further comprises a box body, the box body is formed with an accommodating cavity with an opening downward, the box body is arranged on the heat dissipation plate of the heat dissipation system, so that the accommodating cavity is in a sealed state, and the battery module and the air-cooled pipe of the heat dissipation system are accommodated in the accommodating cavity.

[0037] The embodiments of the utility model have the beneficial effects of:

[0038] In the embodiments of the utility model, the heat dissipation system comprises a heat dissipation plate and an air-cooled pipe, the first flow channel for liquid cooling is formed on the heat dissipation plate; the second flow channel is formed on the heat dissipation plate, the inside of the air-cooled pipe is communicated with the second flow channel, and the air-cooled channel is formed by the air-cooled pipe and the second flow channel, the structure of the heat dissipation system can be simplified by integrating the liquid cooling channel and part of the air-cooled channel on the heat dissipation plate; meanwhile, the first flow channel carries out liquid cooling on one side of the battery module resting on the heat dissipation plate, the air-cooled pipe carries out air cooling on the side of the battery module away from the heat dissipation plate and the other two opposite sides, so that the whole battery module is uniformly cooled; and the heat exchange is carried out between the first flow channel and the second flow channel, the hot air entering the second flow channel is cooled and discharged, the air temperature in the battery pack can be reduced, so that the heat exchange efficiency of the heat dissipation system is improved, and the operation temperature of the battery module is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0040] Figure 1 It is the axial view of the heat dissipation system (with battery module) provided by the embodiments of the utility model;

[0041] Figure 2 It is the axial view of the heat dissipation system (exposing the heat plate) provided by the embodiments of the utility model;

[0042] Figure 3is the axial view of the heat dissipation fin provided by the embodiment of the utility model;

[0043] Figure 4 is the axial view of the heat dissipation system (without battery module) provided by the embodiment of the utility model;

[0044] Figure 5 is the exploded schematic view of the heat dissipation system (without battery module) provided by the embodiment of the utility model;

[0045] Figure 6 is Figure 4 the sectional view along A-A in it;

[0046] Figure 7 is Figure 4 the sectional view along B-B in it;

[0047] Figure 8 is Figure 4 the sectional view along C-C in it;

[0048] Figure 9 is Figure 8 the enlarged schematic view of partial D in it;

[0049] Figure 10 is Figure 4 the axial view of the heat dissipation plate in it;

[0050] Figure 11 is Figure 10 the sectional view along E-E in it;

[0051] Figure 12 is Figure 10 the sectional view along F-F in it;

[0052] Figure 13 is Figure 4 the axial view of the air-cooled pipe in it;

[0053] Figure 14 is the axial view of the battery pack provided by the embodiment of the utility model;

[0054] Figure 15 is Figure 14 the sectional view along G-G in it.

[0055] The name of the component corresponding to the corresponding reference sign in the figure is:

[0056] 1000 battery pack;

[0057] 100 heat dissipation system; 1 heat dissipation plate; 11 one side surface; 12 first flow channel; 121 first flow section; 122 second flow section; 123 third flow section; 13 second flow channel; 141 hot air inlet; 142 air outlet; 15 first plate; 151 one side surface; 152 circumferential wall; 153 first opening; 154 second opening; 155 opening; 16 second plate; 161 one side surface; 162 groove; 1621 bottom wall; 1622 groove; 163 circumferential wall; 18 liquid inlet; 19 liquid outlet; 2 air cooling pipe; 21 end; 22 air cooling channel; 23 air inlet; 24 fan; 3 heat conduction assembly; 31 heat conduction plate; 311 one side surface; 32 heat dissipation fin; 33 heat spreading plate; 331 top; 4 flow guide; 41 flow guide convex rib; 411 top; 5 liquid inlet pipe; 6 liquid outlet pipe;

[0058] 200 battery module; 201 battery cell group; 2011 battery cell; 200a one side; 200b side; 200c side;

[0059] 300 box; 301 accommodating cavity;

[0060] F1 first direction; F2 first direction; F3 thickness direction DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific direction is the direction of the drawing in the drawings. And "inner" and "outer" are relative to the outline of the device.

[0062] In a first aspect, the present application provides a heat dissipation system 100. Please refer to Figures 1 to 7The heat dissipation system 100 comprises a heat dissipation plate 1 and a forced air cooling pipe 2; one side surface 11 of the heat dissipation plate 1 is used for placing the battery module 200 and exchanges heat with the battery module 200; the heat dissipation plate 1 is internally provided with a first flow channel 12 and a second flow channel 13; the first flow channel 12 is used for flowing cooling liquid; the second flow channel 13 is used for flowing air; the first flow channel 12 and the second flow channel 13 exchange heat; the forced air cooling pipe 2 surrounds the top 200a and the two opposite side portions 200c of the battery module 200; the two end portions 21 of the forced air cooling pipe 2 are respectively connected to the heat dissipation plate 1; the inside of the forced air cooling pipe 2 communicates with the second flow channel 13 and jointly forms a forced air cooling channel 22.

[0063] In the embodiment of the utility model, the heat dissipation system 100 comprises a heat dissipation plate 1 and a forced air cooling pipe 2; one side surface 11 of the heat dissipation plate 1 is used for placing the battery module 200; the first flow channel 12 in the heat dissipation plate 1 liquid-cools the battery module 200; the inside of the forced air cooling pipe 2 and the second flow channel 13 in the heat dissipation plate 1 jointly form a forced air cooling channel 22 to air-cool the battery module 200; compared with the scheme in the prior art in which the liquid cooling system and the forced air cooling system are independent of each other, the embodiment integrates the liquid cooling channel and part of the forced air cooling channel 22 on one heat dissipation plate 1, can simplify the structure of the heat dissipation system 100 and further integrates the heat dissipation system 100, so that the internal space of the battery pack 1000 is more reasonably arranged.

[0064] Meanwhile, the first flow channel 12 liquid-cools one side 200b of the battery module 200 placed on the heat dissipation plate 1, and the forced air cooling pipe 2 air-cools the side portion 200a of the battery module 200 away from the heat dissipation plate 1 and the other two opposite side portions 200c, so that the battery module 200 is uniformly cooled as a whole; and the first flow channel 12 and the second flow channel 13 exchange heat, the hot air entering the second flow channel 13 is cooled and discharged, so that the air temperature in the battery pack 1000 is reduced, the heat exchange efficiency of the heat dissipation system 100 is improved, and the operation temperature of the battery module 200 is ensured.

[0065] In one embodiment, the forced air cooling pipe 2 is provided with an air inlet 23 opposite the battery module 200; the air inlet 23 is provided with a fan 24; the heat dissipation plate 1 is provided with an air outlet 142 communicating with the second flow channel 13.

[0066] In liquid cooling, the first flow channel 12 in the heat dissipation plate 1 performs liquid cooling on the side 200b of the battery module 200 resting on the heat dissipation plate 1; in air cooling, the fan 24 works, and the hot air flow at the side 200a of the battery module 200 away from the heat dissipation plate 1 and the other two opposite sides 200c enters the air cooling pipe 2 from the air inlet 23, and then enters the second flow channel 13 through the air cooling pipe 2, and exchanges heat with the cooling liquid in the first flow channel 12, and the hot air flow in the second flow channel 13 is cooled and discharged from the air outlet 142, so as to realize heat dissipation of the side 200a of the battery module 200 away from the heat dissipation plate 1 and the other two opposite sides 200c; in this way, the combination of liquid cooling and air cooling can realize uniform heat dissipation of the whole battery module 200, and improve the problem of poor temperature consistency of the battery module 200. At the same time, the hot air flow in the second flow channel 13 is cooled and discharged from the air outlet 142, which can reduce the air temperature in the battery pack 1000, thereby improving the heat exchange efficiency of the heat dissipation system 100 and ensuring the operating temperature of the battery module 200.

[0067] Moreover, the air cooling pipe 2 is provided with the air inlet 23 opposite to the battery module 200, and the fan 24 is arranged at the air inlet 23; in air cooling, the fan 24 works, and the hot air flow at the side 200a of the battery module 200 away from the heat dissipation plate 1 and the other two opposite sides 200c enters the air cooling pipe 2 from the air inlet 23. The fan 24 and the air cooling pipe 2 arranged opposite to the battery module 200 can quickly gather the wind speed streamline of the hot air flow, ensure that the hot air flow flows along the preset air cooling path, and the single air cooling path makes the air flow more regular, which is beneficial to improving the air cooling heat dissipation efficiency.

[0068] In an embodiment, referring to Figures 1 to 3 , the heat dissipation system 100 further comprises a heat conduction assembly 3, the heat conduction assembly 3 comprises a heat conduction plate 31 and a heat dissipation fin 32, the heat conduction plate 31 is arranged on the side 200a of the battery module 200, the heat dissipation fin 32 is arranged on the side surface 311 of the heat conduction plate 31 away from the battery module 200, and the heat dissipation fin 32 is arranged opposite to the air inlet 23; wherein the central axis of the fan 24 is arranged crosswise to the surface of the heat conduction plate 31.

[0069] In the embodiment, the heat-conducting plate 31 is arranged on the side 200a of the battery module 200, and the heat dissipation fins 32 are arranged on the side surface 311 of the heat-conducting plate 31 away from the battery module 200. The heat generated by the side 200a of the battery module 200 is transferred to the heat dissipation fins 32 through the heat-conducting plate 31. It can be understood that the heat dissipation fins 32 are usually arranged in the form of strips. When the fan 24 is working and air flow is generated, the heat dissipation fins 32 have a large contact area with the air flow, so that the air flow can carry away more heat from the heat dissipation fins 32. In addition, the heat dissipation fins 32 can make the flow lines of the air flow inside the battery pack 1000 uniform, thereby improving the heat dissipation efficiency of the heat dissipation system 100.

[0070] Specifically, referring to Figure 2 and Figure 3 , the heat-conducting assembly 3 further comprises a heat spreading plate 33 arranged between two adjacent battery cells 2011 in the battery module 200, and the heat spreading plate 33 is in contact with the heat-conducting plate 31.

[0071] In the embodiment, the heat spreading plate 33 is arranged between two adjacent battery cells 2011. The heat spreading plate 33 can directly contact the side of the battery cell 2011 with a large area, thereby increasing the heat exchange area between the heat-conducting assembly 3 and the battery cell 2011. In addition, the heat generated inside the battery cell 2011 can be transferred to the heat dissipation fins 32 through the heat spreading plate 33 to the maximum extent. In this way, the heat dissipation efficiency of the heat dissipation system 100 can be further improved.

[0072] It can be understood that the battery module 200 usually comprises a plurality of battery cell groups 201 arranged side by side in the first direction F1. Each battery cell group 201 comprises a plurality of battery cells 2011 arranged side by side in the second direction F2. The heat dissipation system 100 comprises a plurality of heat-conducting assemblies 3 arranged side by side. Each heat-conducting assembly 3 is arranged corresponding to one battery cell group 201 of the battery module 200 and covers a plurality of battery cells 2011 of the battery cell group 201.

[0073] In an embodiment, the heat dissipation plate 1 is provided with a hot air inlet 141 and an air outlet 142 communicating with the second flow channel 13, the hot air inlet 141 communicates with the inside of the air cooling pipe 2 respectively; a plurality of flow guides 4 are arranged in the second flow channel 13, the plurality of flow guides 4 are arranged side by side, and the direction from the hot air inlet 141 to the air outlet 142 is arranged as the extension direction of the flow guides 4; the hot air flow in the air cooling pipe 2 enters the second flow channel 13 from the hot air inlet 141, and by arranging the flow guides 4, the flow rate of the hot air flow in the second flow channel 13 can be increased, the heat exchange efficiency between the hot air flow in the second flow channel 13 and the cooling liquid in the first flow channel 12 is improved, so that the cooled cold air can be quickly discharged into the battery pack 1000 from the air outlet 142, and then the air temperature in the battery pack 1000 can be quickly reduced.

[0074] The utility model does not make specific limit to the arrangement mode of the first flow channel 12 and the second flow channel 13. In an embodiment, the orthographic projection of the first flow channel 12 on the heat dissipation plate 1 covers the orthographic projection of the battery module 200 on the heat dissipation plate 1;The second flow channel 13 includes a first branch and a second branch, and the first branch and the second branch are located on both sides of the first flow channel 12 respectively;Wherein, the two end portions 21 of the air cooling pipe 2 communicate with the first branch and the second branch respectively;The air outlet 142 is arranged in the first branch and the second branch respectively.

[0075] In another embodiment, please refer to Figures 6 to 9 In the thickness direction F3 of the heat dissipation plate 1, the first flow channel 12 and the second flow channel 13 are arranged side by side, and the first flow channel 12 is located on the side of the second flow channel 13 close to the battery module 200, and the orthographic projection of the first flow channel 12 on the heat dissipation plate 1 covers the orthographic projection of the battery module 200 on the heat dissipation plate 1. In this embodiment, the first flow channel 12 is arranged close to the battery module 200 to liquid cool one side 200b of the battery module 200 arranged on the heat dissipation plate 1;The second flow channel 13 is located on the side of the first flow channel 12 away from the battery module 200, and after the hot air flow generated by the battery module 200 enters the second flow channel 13 from the air cooling pipe 2, heat exchange can be carried out with the cooling liquid in the first flow channel 12, thereby forming cold air discharge;In this way, on the basis of simplifying the structure of the heat dissipation system 100, by reasonably arranging the liquid cooling channel and the air cooling channel 22, the combination of liquid cooling and air cooling is realized, and the heat dissipation efficiency of the heat dissipation system 100 is improved.

[0076] In an embodiment, please refer to Figures 10 to 12The heat dissipation plate 1 comprises a first plate 15 and a second plate 16 stacked in the thickness direction F3 of the heat dissipation plate 1, and a groove 162 is arranged on one side surface 161 of the second plate 16. The first plate 15 is arranged in the slot opening 1622 of the groove 162 and is spaced apart from the bottom wall 1621 of the groove 162 to form the second flow channel 13 together. The first flow channel 12 is formed in the first plate 15. In this way, the heat dissipation plate 1 can be formed by stacking two plates, which is simple in structure and small in space occupation.

[0077] Specifically, the first plate 15 is provided with a first opening 153 and a second opening 154 communicating with the groove 162. The first opening 153 is arranged as the hot air inlet 141 of the second flow channel 13, and the second opening 154 is arranged as the air outlet 142 of the second flow channel 13. The two ends 21 of the air cooling pipe 2 are connected to the first plate 15, and the inside of the air cooling pipe 2 communicates with the first opening 153.

[0078] That is, the first opening 153 and the second opening 154 are arranged on the first plate 15. The hot gas flow in the air cooling pipe 2 enters the second flow channel 13 from the first opening 153, exchanges heat with the cooling liquid in the first flow channel 12 in the second flow channel 13, and is cooled into cold air, which is then discharged to the battery pack 1000 from the second opening 154, thereby rapidly reducing the air temperature in the battery pack 1000.

[0079] And, referring to Figure 5 and Figure 10 The peripheral side wall 152 of the first plate 15 is partially recessed compared with the peripheral side wall 163 of the second plate 16 to form a plurality of openings 155 communicating with the second flow channel 13. The plurality of openings 155 are distributed along the peripheral side of the first plate 15, wherein the opposite two openings 155 are arranged as the first opening 153, and the remaining openings 155 are arranged as the second opening 154. The two ends 21 of the air cooling pipe 2 are respectively inserted into the opposite two openings 155.

[0080] The application does not make specific restrictions on the setting position of the openings 155. The two opposite openings 155 are respectively located on the two sides of the first plate 15 in the first direction F1, and the remaining openings 155 are respectively arranged on one side of the first plate 15 in the second direction F2, and the first direction F1 and the second direction F2 are arranged in a cross manner. When air cooling is performed, the fan 24 works, the hot air flow at the side of the battery module 200 enters the air cooling pipe 2 from the air inlet 23, and enters the second flow channel 13 through the two opposite openings 155, respectively. After the hot air flow exchanges heat with the cooling liquid in the first flow channel 12 in the second flow channel 13, the cold air is discharged from the remaining openings 155, so as to reduce the air temperature in the battery pack 1000, and further improve the heat exchange efficiency of the heat dissipation system 100, and ensure the operating temperature of the battery module 200.

[0081] Specifically, referring to Figure 12 , the heat dissipation plate 1 further comprises a plurality of flow guide ribs 41 protruding from the bottom wall 1621 of the groove body 162. The plurality of flow guide ribs 41 are arranged side by side, and the direction from the first opening 153 to the second opening 154 is configured as the extension direction of the flow guide rib 41. The end portion 411 of the flow guide rib 41 towards the first plate 15 is arranged flush with the notch 1622 of the groove body 162. The first plate 15 is placed on the end portion 411 of the plurality of flow guide ribs 41. The arrangement of the flow guide rib 41 not only increases the flow rate of the hot air flow in the second flow channel 13, but also improves the heat exchange efficiency between the hot air flow in the second flow channel 13 and the cooling liquid in the first flow channel 12. Moreover, the flow guide rib 41 can support the first plate 15 and improve the stability of the first plate 15.

[0082] It can be understood that the flow guide rib 41 extends in the direction from the first opening 153 to the second opening 154. Since the first opening 153 is located on one side of the first plate 15 in the first direction F1, and the second opening 154 is located on one side of the first plate 15 in the second direction F2, the flow guide rib 41 is arranged in a bent manner. The contour line of the flow guide rib 41 can be bent by 90°, and the contour line of the flow guide rib 41 can also be a smooth curve. In an embodiment, referring to Figure 12 , in the direction from the first opening 153 to the second opening 154, the extension path of the flow guide rib 41 is arranged in an arc shape. In this way, the contour line of the flow guide rib 41 is a smooth curve, which can further increase the flow rate of the hot air flow in the second flow channel 13.

[0083] In an embodiment, referring to Figure 10The side surface 11 of the heat dissipation plate 1 is provided with a liquid inlet 18 and a liquid outlet 19 which are communicated with the first flow channel 12; the heat dissipation system 100 further comprises a liquid inlet pipe 5 and a liquid outlet pipe 6 which are arranged on the side surface 11 of the heat dissipation plate 1; one end of the liquid inlet pipe 5 is communicated with the liquid inlet 18, and one end of the liquid outlet pipe 6 is communicated with the liquid outlet 19. During liquid cooling, the cooling liquid enters the liquid inlet 18 from the liquid inlet pipe 5, flows through the first flow channel 12, and then flows to the liquid outlet pipe 6 from the liquid outlet 19, thereby forming a liquid cooling loop.

[0084] And, referring to Figure 11 The first flow channel 12 comprises a first flow section 121, a second flow section 122, and a third flow section 123; the first flow section 121 and the second flow section 122 are arranged side by side in the first direction F1 and extend along the second direction F2; the two end portions of the first flow section 121 and the second flow section 122 on the same side are communicated by the third flow section 123; the liquid inlet 18 and the liquid outlet 19 are respectively communicated with the other two end portions of the first flow section 121 and the second flow section 122 on the same side.

[0085] In this embodiment, the liquid inlet 18 and the liquid outlet 19 are arranged on the side surface 11 of the heat dissipation plate 1 and are close to one side edge of the first plate member 15 in the second direction F2; thus, when the liquid inlet pipe 5 and the liquid outlet pipe 6 are arranged on the first plate member 15, the liquid inlet pipe 5 and the liquid outlet pipe 6 do not interfere with the air cooling pipe 2, thereby making the arrangement of the components of the heat dissipation system 100 more reasonable.

[0086] Specifically, referring to Figure 11 Two first flow channels 12 are arranged in the heat dissipation plate 1, and in the first direction F1, the two first flow channels 12 are symmetrically distributed along the central axis of the heat dissipation plate 1; two first flow sections 121 in the two first flow channels 12 are arranged adjacent to each other, the liquid inlet 18 is communicated with the end portions of the two first flow sections 121, and the liquid outlet 19 is provided with two liquid outlets which are respectively communicated with the end portions of the two second flow sections 122.

[0087] In this embodiment, by arranging two first flow channels 12 in an array in the first plate member 15, the flow rate of the cooling liquid in the first plate member 15 can be increased, thereby improving the liquid cooling heat exchange efficiency; and the liquid inlet 18 is communicated with the end portions of the two adjacent first flow sections 121, and the liquid outlet 19 is provided with two liquid outlets which are respectively communicated with the end portions of the two second flow sections 122; thus, the liquid inlet 18 and the two liquid outlets 19 are arranged on the same side, which is beneficial to the arrangement of the liquid inlet pipe 5 and the liquid outlet pipe 6.

[0088] Please refer to Figure 1 and Figure 13 The air-cooled pipe 2 is arranged around the side 200a of the battery module 200 away from the heat dissipation plate 1 and the two opposite sides 200c in the first direction F1; the heat dissipation system 100 comprises at least two air-cooled pipes 2, and the two air-cooled pipes 2 are arranged side by side in the second direction F2; by arranging at least two air-cooled pipes 2, more heat can be taken away, thereby improving the air-cooled heat dissipation efficiency.

[0089] In a second aspect, the embodiments of the present application also provide a battery pack 1000. The battery pack 1000 comprises a heat dissipation system 100 and a battery module 200; the battery module 200 is arranged on one side surface 11 of the heat dissipation plate 1 of the heat dissipation system 100. It should be noted that the heat dissipation system 100 is arranged as the heat dissipation system 100 described above, that is, the heat dissipation system 100 has all the technical features of the heat dissipation system 100 described above, that is, the battery pack 1000 comprises all the embodiments of the heat dissipation system 100 described above.

[0090] The heat dissipation system 100 comprises a heat dissipation plate 1 and an air-cooled pipe 2; one side surface 11 of the heat dissipation plate 1 is used for placing the battery module 200; the first flow channel 12 in the heat dissipation plate 1 is used for liquid cooling the battery module 200; the inside of the air-cooled pipe 2 and the second flow channel 13 in the heat dissipation plate 1 together form an air-cooled channel 22, which is used for air cooling the battery module 200; by integrating the liquid cooling channel and part of the air-cooled channel 22 on one heat dissipation plate 1, the structure of the heat dissipation system 100 can be simplified, and the heat dissipation system 100 can be further integrated, thereby making the internal space arrangement of the battery pack 1000 more reasonable.

[0091] During liquid cooling, the first flow channel 12 within the heat sink 1 dissipates heat to one side 200b of the battery module 200 placed on the heat sink 1. During air cooling, the fan 24 operates, and hot airflow from the side 200a of the battery module 200 away from the heat sink 1 and the other two opposite sides 200c enters the air cooling pipe 2 through the air inlet 23. After entering the second flow channel 13 through the air cooling pipe 2, it exchanges heat with the coolant in the first flow channel 12. The hot airflow in the second flow channel 13 is cooled down and discharged from the air outlet 142, thereby achieving heat dissipation for the side 200a of the battery module 200 away from the heat sink 1 and the other two opposite sides 200c. In this way, the combination of liquid cooling and air cooling can achieve uniform heat dissipation for the entire battery module 200, improving the problem of poor temperature uniformity of the battery module 200. Meanwhile, the hot airflow in the second flow channel 13 is cooled down and discharged from the air outlet 142, which can reduce the air temperature in the battery pack 1000, thereby improving the heat exchange efficiency of the heat dissipation system 100 and ensuring the operating temperature of the battery module 200.

[0092] Furthermore, the air-cooling pipe 2 is provided with an air inlet 23 facing the battery module 200, and a fan 24 is provided at the air inlet 23. During air cooling, the fan 24 operates, and the hot airflow from the side 200a of the battery module 200 away from the heat sink 1 and the other two opposite sides 200c enters the air-cooling pipe 2 through the air inlet 23. The fan 24 and the air-cooling pipe 2, which are positioned facing the battery module 200, can quickly concentrate the airflow velocity streamline, ensuring that the hot airflow flows along a preset air-cooling path. The single air-cooling path makes the airflow more regular, which is beneficial to improving the air-cooling heat dissipation efficiency.

[0093] It is understandable that in related technologies, double-sided liquid cooling or air cooling with 300 openings in the housing is usually used to dissipate heat from the battery module 200; however, in extreme environments, such as high salt and high humidity environments, condensation or corrosion may occur on the battery module 200, thereby damaging the battery module 200.

[0094] Please see Figure 14 and Figure 15The battery pack 1000 further comprises a box 300, the box 300 is formed with an open downward containing cavity 301, the box 300 is covered on the heat dissipation plate 1, and the battery module 200 and the air-cooled pipe 2 are contained in the containing cavity 301.The box 300 and the heat dissipation plate 1 are enclosed to form a closed containing cavity 301, the battery module 200 and the air-cooled pipe 2 are contained in the containing cavity 301, on the one hand, the combination of air-cooled and liquid-cooled can effectively guarantee the safe operation of the battery module 200 in the closed containing cavity 301, and on the other hand, the closed containing cavity 301 can avoid the battery module 200 from producing condensation or being corroded in an extreme environment, thereby prolonging the service life of the battery module 200.

[0095] The above detailed the embodiments of the present application, the principle and implementation mode of the present application are described by applying specific examples, the above embodiment is only used for helping to understand the method and core idea of the present application, meanwhile, for the person skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A heat dissipation system, characterized by, The heat dissipation system comprises: a heat dissipation plate, one side surface of the heat dissipation plate is used for placing the battery module and exchanging heat with the battery module, a first flow channel and a second flow channel are arranged in the heat dissipation plate, the first flow channel is used for flowing cooling liquid, the second flow channel is used for flowing air, and the first flow channel and the second flow channel exchange heat; and an air-cooled pipe, the air-cooled pipe surrounds the side of the battery module away from the heat dissipation plate and the other two opposite sides, two ends of the air-cooled pipe are connected to the heat dissipation plate respectively, the inside of the air-cooled pipe communicates with the second flow channel, and the air-cooled pipe and the second flow channel jointly form an air-cooled channel.

2. The heat dissipation system of claim 1, wherein, An air inlet opposite to the battery module is arranged on the air-cooled pipe, and a fan is arranged at the air inlet. An air outlet communicating with the second flow channel is arranged on the heat dissipation plate.

3. The heat dissipation system of claim 2, wherein, The heat dissipation system further comprises a heat conduction assembly, the heat conduction assembly comprises a heat conduction plate and a heat dissipation fin, the heat conduction plate is arranged on the side of the battery module, the heat dissipation fin is arranged on the side surface of the heat conduction plate away from the battery module, and the heat dissipation fin is arranged opposite to the air inlet; wherein the central axis of the fan and the surface of the heat conduction plate are cross arranged.

4. The heat dissipation system of claim 3, wherein, The heat conduction assembly further comprises a heat equalizing plate, the heat equalizing plate is arranged between two adjacent battery cells in the battery module, and the heat equalizing plate is attached to the heat conduction plate.

5. The heat dissipation system of claim 3, wherein, The heat dissipation system comprises a plurality of heat conduction assemblies arranged side by side, and each heat conduction assembly is used for corresponding to one battery cell group of the battery module.

6. The heat dissipation system of claim 1, wherein, The heat dissipation plate is provided with a hot air inlet and an air outlet communicating with the second flow channel, and the hot air inlet communicates with the inside of the air-cooled pipe respectively. A plurality of flow guides are arranged in the second flow channel, the plurality of flow guides are arranged side by side, and the direction from the hot air inlet to the air outlet is configured as the extension direction of the flow guides.

7. The heat dissipation system of claim 1, wherein, In the thickness direction of the heat dissipation plate, the first flow channel and the second flow channel are arranged side by side, and the first flow channel is located on the side of the second flow channel close to the battery module, and the orthogonal projection of the first flow channel on the heat dissipation plate covers the orthogonal projection of the battery module on the heat dissipation plate.

8. The heat dissipation system of claim 1, wherein, The heat dissipation plate comprises a first plate and a second plate arranged in the thickness direction, one side surface of the second plate is provided with a groove, the first plate is located in the slot of the groove and is arranged spaced apart from the bottom wall of the groove, so as to jointly form the second flow channel, and the first plate forms the first flow channel.

9. The heat dissipation system of claim 8, wherein, The first plate is provided with a first opening and a second opening communicating with the groove, the first opening is arranged as the hot air inlet of the second flow channel, and the second opening is arranged as the air outlet of the second flow channel. Wherein, two ends of the air-cooled pipe are connected to the first plate respectively, and the inside thereof communicates with the first opening.

10. The heat dissipation system of claim 9, wherein, The peripheral side wall of the first plate is locally recessed compared with the peripheral side wall of the second plate, so as to form a plurality of openings communicating with the second flow channel, and the plurality of openings are distributed along the peripheral side of the first plate, wherein, opposite two openings are arranged as the first opening, and the remaining openings are arranged as the second opening. Two ends of the air-cooled pipe correspond to the two opposite openings respectively.

11. The heat dissipation system of claim 10, wherein, The two opposite openings are located on two sides of the first plate in a first direction, and the remaining openings are arranged on one side of the first plate in a second direction, and the first direction and the second direction are arranged in a cross manner.

12. The heat dissipation system of claim 9, wherein, The heat dissipation plate further comprises a plurality of flow guide ribs protruding from the bottom wall of the groove body, and the plurality of flow guide ribs are arranged side by side. The extension direction of the flow guide ribs is from the first opening to the second opening. The end of the flow guide rib towards the end of the first plate is flush with the slot of the groove body. The first plate is placed on the end of the plurality of flow guide ribs.

13. The heat dissipation system of claim 12, wherein, In the direction from the first opening to the second opening, the extension path of the flow guide rib is arranged in an arc shape.

14. The heat dissipating system of claim 7 or 8, wherein, The side surface of the heat dissipation plate is provided with a liquid inlet and a liquid outlet communicating with the first flow channel. The heat dissipation system further comprises a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are arranged on one side surface of the heat dissipation plate. One end of the liquid inlet pipe communicates with the liquid inlet, and one end of the liquid outlet pipe communicates with the liquid outlet.

15. The heat dissipation system of claim 14, wherein, The first flow channel comprises a first flow section, a second flow section and a third flow section. The first flow section and the second flow section are arranged side by side in a first direction and extend in a second direction. The two ends of the first flow section and the second flow section on the same side are communicated by the third flow section. The liquid inlet and the liquid outlet are arranged on the same side and respectively communicate with the other two ends of the first flow section and the second flow section on the same side.

16. The heat dissipation system of claim 15, wherein, Two first flow channels are arranged in the heat dissipation plate, and in the first direction, the two first flow channels are symmetrically distributed along the central axis of the heat dissipation plate. Two first flow sections in the two first flow channels are arranged adjacent to each other. The liquid inlet communicates with the ends of the two first flow sections. The liquid outlet is provided with two liquid outlets and respectively communicates with the ends of the two second flow sections.

17. The heat dissipation system of claim 1, wherein, The air-cooled pipe surrounds the battery module on the side away from the heat dissipation plate and on the two opposite sides in the first direction. The heat dissipation system comprises at least two air-cooled pipes, and the two air-cooled pipes are arranged side by side in a second direction.

18. A battery pack, characterized by The heat dissipation system comprises: The heat dissipation system according to any one of claims 1-17; and The battery module is arranged on one side surface of the heat dissipation plate of the heat dissipation system.

19. The battery pack of claim 18, wherein, The battery pack further comprises a box body formed with an accommodation cavity with an opening downward. The box body is arranged on the heat dissipation plate of the heat dissipation system, so that the accommodation cavity is in a sealed state. The battery module and the air-cooled pipe of the heat dissipation system are accommodated in the accommodation cavity.

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