Liquid cooling plate and battery pack

Abstract

The utility model provides a liquid cooling plate and a battery pack, the liquid cooling plate comprises a main body plate and a flat plate, the main body plate comprises a main body and a convex rib, the convex rib is provided with a free end, the free end is provided with at least one of a knife starting circular truncated cone and a knife collecting circular truncated cone, and the knife starting circular truncated cone and the knife collecting circular truncated cone are used for increasing the connection area; the flat plate is connected to one side, deviating from the body, of the convex rib, and forms a liquid cooling flow channel with the main body plate; the battery pack comprises a battery and a liquid cooling plate, and the liquid cooling plate is attached to the surface of the battery; according to the battery pack adopting the liquid cooling plate, the flowing time of cooling liquid flowing through the liquid cooling plate is prolonged, heat on the surface of the battery is rapidly taken away, the temperature of the battery is controlled within a proper range, the service life of the battery is prolonged, and normal use of the battery is ensured; moreover, the liquid cooling plate is only composed of the main body plate and the flat plate, the structure is simple, welding parts of the main body plate and the flat plate are few, the reject ratio of the liquid cooling plate is greatly reduced, the strength of the whole liquid cooling plate can be guaranteed, and the practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a liquid cooling plate and a battery pack. Background Technology

[0002] In related technologies, liquid cooling plates are a crucial component of active heat dissipation systems for energy storage batteries, and proper temperature control is essential for battery life. Currently, the optimal temperature for energy storage batteries is 10℃~35℃. Excessively high or low temperatures will further shorten battery life. Therefore, energy storage battery temperature control not only involves maintaining the battery at a suitable temperature but also ensuring that the temperature difference inside the battery pack is less than 3℃.

[0003] However, the mainstream liquid cooling plates on the market are currently aluminum extrusion liquid cooling plates or brazed liquid cooling plates. Aluminum extrusion liquid cooling plates have too many welds, and the welding process is prone to causing perforation of the liquid cooling plate, resulting in a high defect rate. Brazed liquid cooling plates have more processes and lower overall strength. Utility Model Content

[0004] The embodiments of this utility model provide a liquid cooling plate and a battery pack, which can improve the technical problem of easy perforation of the liquid cooling plate during the welding process.

[0005] In a first aspect, embodiments of the present invention provide a liquid cooling plate, comprising:

[0006] A main plate, comprising a body and a protruding rib, the protruding rib protruding from the body, the protruding rib having a free end, and the free end having at least one of a starting frustum and a ending frustum, the starting frustum and the ending frustum being used as the starting point and ending point of welding, respectively; and...

[0007] A flat plate is connected to the side of the rib facing away from the body, and forms a liquid cooling channel between it and the main plate.

[0008] In one embodiment, the main body plate further includes an outer frame protruding from the body, the protruding rib being located within the space enclosed by the outer frame, and the outer frame being connected to the flat plate.

[0009] In one embodiment, the rib includes at least a first rib and a second rib. The first rib has two opposite ends, both of which are free ends. The second rib has a first end and one or more second ends. The first end is connected to the outer frame, and the second end is a free end.

[0010] In one embodiment, the first rib is bent.

[0011] In one embodiment, the first rib is bent and forms a liquid-cooled cavity on the body for coolant flow. A plurality of second ribs are arranged opposite each other, and the second ribs extend at least partially into the liquid-cooled cavity to achieve coolant diversion.

[0012] In one embodiment, the rib includes multiple straight segments, two connected straight segments extending in different directions, the starting platform and the ending platform are connected to the straight segments, and the diameters of the starting platform and the ending platform are greater than the width of the straight segments.

[0013] In one embodiment, the intersection of the connected straight line segments protrudes toward the included angle of the two straight line segments.

[0014] In one embodiment, the rib includes a plurality of straight segments and bent segments, the bent segments being located at the intersection of two straight segments and protruding toward the included angle of the two straight segments.

[0015] In one embodiment, the starting platform and the ending platform are connected to the straight segment, and the diameters of the starting platform and the ending platform are greater than the width of the straight segment.

[0016] In one embodiment, the diameters of the starting and ending cones are 15mm to 25mm, and the width of the rib is 10mm to 16mm.

[0017] In one embodiment, the outer frame has a first opening, the opening direction of the first opening is perpendicular to the body, and the first opening is used to connect and fix the first device.

[0018] In one embodiment, the outer frame has a second opening, the opening direction of the second opening is parallel to the body, and the second opening is used to connect and fix the first device.

[0019] In one embodiment, the outer frame is further provided with a water inlet and a water outlet, which are respectively connected to the liquid cooling channel.

[0020] In one embodiment, the inner diameter of the water inlet is 8mm to 12mm, and / or the inner diameter of the water outlet is 8mm to 12mm.

[0021] In one embodiment, the rib and the plate are connected by friction stir welding.

[0022] Secondly, embodiments of the present invention provide a battery pack, including a battery and a liquid cooling plate, wherein the liquid cooling plate is attached to the surface of the battery.

[0023] The beneficial effects of the embodiments of this utility model are as follows:

[0024] In the embodiments of this utility model, the strength of the liquid cooling plate can be enhanced by providing ribs on the main body. At the same time, the ribs are provided with free ends, and at least one of a starting frustum and a ending frustum is provided on the free ends. Therefore, during the connection process between the ribs and the plate, the ribs can serve as a connection trajectory, and the starting frustum and ending frustum can increase the contact area between the ribs and the plate, thereby avoiding perforation at the connection start point and connection end point, thus preventing liquid leakage of the liquid cooling plate, reducing the defect rate of the liquid cooling plate, and ensuring the normal use of the liquid cooling plate. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the liquid cooling plate provided in an embodiment of this utility model;

[0027] Figure 2 yes Figure 1 The diagram shows a structural schematic of the liquid cooling plate from another view.

[0028] Figure 3 yes Figure 1 The diagram shows the structure of the liquid cooling channel in the liquid cooling plate.

[0029] Figure 4 yes Figure 1 A schematic diagram of the liquid cooling channel in the liquid cooling plate from another view;

[0030] Figure 5 yes Figure 2 A magnified view of a portion of the liquid cooling plate at point A.

[0031] Figure Labels

[0032] 100. Liquid cooling plate;

[0033] 110. Main body plate; 111. Body; 112. Raised rib; 1121. First raised rib; 1122. Second raised rib; 1123. Straight section; 1124. Bending section; 113. Free end; 114. Starting frustum; 115. Finishing frustum; 116. Outer frame;

[0034] 120. Flat panel;

[0035] 130. Liquid cooling flow channel;

[0036] 140. First opening;

[0037] 150, second opening 150;

[0038] 160, water inlet nozzle 160;

[0039] 170. Water outlet. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0041] Reference Figure 1 and Figure 2 As shown, this application provides a liquid-cooled plate 100, including a main plate 110 and a flat plate 120. The main plate 110 includes a body 111 and a rib 112. The rib 112 protrudes from the body 111 and has a free end 113. The free end 113 has at least one of a starting frustum 114 and a ending frustum 115. The starting frustum 114 and the ending frustum 115 are used as the starting point and the ending point of welding, respectively. The flat plate 120 is connected to the side of the rib 112 away from the body 111 and forms a liquid-cooled flow channel 130 between the flat plate 120 and the main plate 110.

[0042] In this embodiment, by providing a rib 112 on the body 111, the strength of the liquid cooling plate 100 can be enhanced. At the same time, the rib 112 is provided with a free end 113, and the free end 113 is provided with at least one of a starting frustum 114 and a retracting frustum 115. Therefore, during the connection process between the rib 112 and the plate 120, the rib 112 can serve as a connection trajectory, and the starting frustum 114 and the retracting frustum 115 can increase the contact area between the rib 112 and the plate 120, thereby avoiding perforation at the connection start point and connection end point, thus preventing liquid leakage of the liquid cooling plate 100, reducing the defect rate of the liquid cooling plate 100, and ensuring the normal use of the liquid cooling plate 100.

[0043] In some embodiments, refer to Figure 3As shown, the main body plate 110 also includes an outer frame 116 protruding from the main body 111. The protruding rib 112 is located within the space enclosed by the outer frame 116, and the outer frame 116 is connected to the plate 120. It can be understood that the outer frame 116 can form a surrounding structure around the outer periphery of the main body plate 110. After the protruding rib 112 and the plate 120 are connected, a liquid cooling channel 130 is formed between the outer frame 116, the protruding rib 112, and the plate 120. Furthermore, the outer frame 116 can abut against the side of the plate 120 facing the protruding rib 112 to prevent coolant leakage.

[0044] It should also be noted that, in this embodiment, the height of the outer frame 116 is not lower than the height of the rib 112. When the height of the outer frame 116 is greater than the rib 112, the coolant cannot flow evenly in the liquid cooling channel 130.

[0045] In this embodiment, for ease of processing, the height of the outer frame 116 is the same as the height of the rib 112. Therefore, it can be ensured that the coolant flows evenly in the liquid cooling channel 130, thereby ensuring the cooling efficiency of the liquid cooling plate 100.

[0046] In some embodiments, refer to Figure 3 and Figure 4 As shown, the rib 112 includes at least one of a first rib 1121 and a second rib 1122. The first rib 1121 includes two opposite ends, and both ends of the first rib 1121 are free ends 113. The second rib 1122 includes a first end and one or more second ends. The first end is connected to the outer frame 116, and the second end is a free end 113.

[0047] In some embodiments, refer to Figure 3 and Figure 4 As shown, the first protruding rib 1121 is bent. By setting the first protruding rib 1121 in a bent manner, a bent and surrounding liquid cooling channel 130 can be formed on the main body plate 110, thereby increasing the flow area of ​​the coolant on the main body plate 110, thus ensuring the cooling effect of the coolant on the battery and ensuring the normal use of the battery.

[0048] In some embodiments, refer to Figure 3 and Figure 4As shown, the first rib 1121 is bent and forms a liquid-cooled cavity on the body 111 for coolant flow. Multiple second ribs 1122 are arranged opposite each other, and at least partially extend into the liquid-cooled cavity to divert coolant flow. Thus, the second ribs 1122 act as diverting ribs. In this embodiment, the second ribs 1122 are inserted into the liquid-cooled cavity formed by the first rib 1121, causing impact and agitation as the coolant passes through, extending the time the coolant flows through the liquid-cooled plate 100, thereby increasing the cooling efficiency of the liquid-cooled plate 100, preventing battery overheating, and ensuring battery lifespan.

[0049] In some embodiments, the rib 112 includes a plurality of straight segments 1123, two connected straight segments 1123 having different extending directions, the starting platform 114 and the ending platform 115 being connected to the straight segments 1123, and the diameters of the starting platform 114 and the ending platform 115 being greater than the width of the straight segments 1123.

[0050] In some embodiments, the intersection of the connected straight line segments 1123 protrudes toward the angle between the two straight line segments 1123.

[0051] In some embodiments, refer to Figure 3 and Figure 4 As shown, the rib 112 includes multiple straight segments 1123 and bent segments 1124. The bent segment 1124 is located at the intersection of two straight segments 1123, and protrudes towards the angle between the two straight segments 1123. When the rib 112 is connected to the plate 120, the connection area between the bent segment and the plate 120 is larger than the connection area between the straight segment 1123 and the plate 120. This avoids perforation of the liquid cooling plate 100 due to improper connection at the bent point, reducing the defect rate and ensuring the normal use of the liquid cooling plate 100.

[0052] In some embodiments, refer to Figure 3 and Figure 4 As shown, the starting platform 114 and the ending platform 115 are connected to the straight segment 1123, and the diameters of the starting platform 114 and the ending platform 115 are larger than the width of the straight segment 1123. Therefore, in this embodiment, it can be ensured that the area of ​​the starting platform 114 and the ending platform 115 is always larger than the area of ​​the straight segment 1123, thus preventing perforation and leakage of the liquid cooling plate 100 at the starting and ending points of the connection, and reducing the defect rate of the liquid cooling plate 100.

[0053] In some embodiments, refer to Figure 3 and Figure 4As shown, the diameters of the starting platform 114 and the ending platform 115 are 15mm to 25mm. By setting these parameters, the diameters of the starting platform 114 and the ending platform 115 can meet the dimensions of most connecting tools, resulting in high compatibility and versatility.

[0054] In specific settings, the diameters of the starting platform 114 and the ending platform 115 can be set according to the actual required tool size. It is only necessary to ensure that the diameters of the starting platform 114 and the ending platform 115 are both greater than the diameter of the straight segment 1123.

[0055] In some embodiments, refer to Figure 3 and Figure 4 As shown, the width of the protruding rib 112 is 10mm to 16mm. By setting the above parameters, the width of the protruding rib 112 can meet the dimensions of most connecting tools, resulting in high compatibility and versatility.

[0056] In specific settings, the width of the rib 112 can be set according to the actual size of the connecting tool. It is only necessary to ensure that the width of the rib 112 is greater than the size of the connecting tool.

[0057] In some embodiments, refer to Figure 5 As shown, a first opening 140 is provided on the outer frame 116. The opening direction of the first opening 140 is perpendicular to the body 111. The first opening 140 is used to connect and fix a first device. In this embodiment, the first device is a battery. Since the opening direction of the first opening 140 is perpendicular to the body 111, it can be used for the vertical locking method of the liquid cooling plate 100 and the battery, ensuring the connection between the liquid cooling plate 100 and the battery.

[0058] In some embodiments, refer to Figure 5 As shown, the outer frame 116 has a second opening 150, the opening direction of which is parallel to the body 111. The second opening 150 is used to connect and fix the first device. In this embodiment, the first device is a battery. Since the opening direction of the second opening 150 is parallel to the body 111, it can be used for the lateral locking method of the liquid cooling plate 100 and the battery, ensuring the connection between the liquid cooling plate 100 and the battery.

[0059] Of course, in some embodiments, reference is made to Figure 5 As shown, the outer frame 116 has a first opening 140 and a second opening 150 for connection and fixing. The opening direction of the first opening 140 is perpendicular to the body 111, and the opening direction of the second opening 150 is parallel to the body 111. Therefore, the liquid cooling plate 100 has both vertical and horizontal locking methods, which can be compatible with most installation methods and is highly practical.

[0060] In some embodiments, refer to Figure 2 As shown, the outer frame 116 is also provided with a water inlet 160 and a water outlet, which are respectively connected to the liquid cooling channel 130. In this embodiment, the water inlet 160 and the water outlet are distributed on the same side of the outer frame 116, thus ensuring the flow length of the coolant in the liquid cooling channel 130 and extending the flow time of the coolant in the liquid cooling plate 100, thereby increasing the cooling efficiency of the liquid cooling plate 100.

[0061] It is understood that in this embodiment, the water inlet 160, the water outlet, the outer frame 116, the rib 112, and the body 111 are integrally die-cast.

[0062] In some embodiments, the inner diameter of the water inlet 160 is 8mm to 12mm. Therefore, in specific implementations, the inner diameter of the water inlet 160 can be set according to actual cooling requirements.

[0063] In some embodiments, the inner diameter of the water outlet is 8mm to 12mm. Therefore, in specific implementations, the inner diameter of the water outlet can be set according to actual cooling needs.

[0064] In some embodiments, refer to Figure 2 As shown, the inner diameters of the water inlet 160 and the water outlet are 8mm to 12mm. Therefore, in specific implementations, the inner diameters of the water inlet 160 and the water outlet can be set according to the actual cooling requirements.

[0065] It should also be noted that the inner diameter of the inlet nozzle 160 is not less than the inner diameter of the outlet nozzle, thus preventing the coolant inlet speed from being less than the coolant outlet speed. When the coolant outlet speed is too fast, it is easy to cause a phenomenon where there is no coolant in some parts of the liquid cooling channel 130, which will have a significant impact on the cooling efficiency of the liquid cooling plate 100.

[0066] In practical implementation, the inner diameter of the inlet nozzle 160 can be set to be consistent with the inner diameter of the outlet nozzle, thus ensuring that the flow efficiency of the coolant is consistent with the flow efficiency of the outlet nozzle, thereby making the cooling effect of the coolant better.

[0067] In some embodiments, the rib 112 and the plate 120 are connected by friction stir welding, resulting in high welding quality and fast welding efficiency. It is understood that in this embodiment, the connecting tool for the rib 112 and the plate 120 is a welding tool.

[0068] It is understandable that, in order to ensure the cooperation between the protruding rib 112 and the welding tool during the welding process, in this embodiment, both the starting platform 114 and the ending platform 115 are set to be circular. Of course, in other embodiments, they can also be set to other shapes, such as square or rectangular, according to actual needs, to facilitate the starting and ending actions of the welding tool.

[0069] It should also be noted that in this embodiment, the main body plate 110 is produced by aluminum casting process and is integrally pressed out by a die casting machine; and the flat plate 120 is cut according to the shape of the main body plate 110.

[0070] In summary, in this embodiment, coolant is injected into the liquid cooling channel 130 through the inlet 160. The coolant flows through the liquid cooling channel 130 and is diverted by the second rib 1122. Therefore, when the coolant flows through the liquid cooling channel 130, it can impact the first rib 1121 and the second rib 1122. The second rib 1122 diverts the coolant, which better prolongs the flow time of the coolant through the liquid cooling plate 100. At the same time, it can quickly remove the heat from the battery surface, control the battery temperature within a suitable range, extend the battery life, and ensure the normal use of the battery.

[0071] Furthermore, the liquid cooling plate 100 consists of only two components: the main plate 110 and the flat plate 120. The structure is simple, and there are fewer welding parts on the main plate 110 and the flat plate 120, which greatly reduces the defect rate of the liquid cooling plate 100 and can also ensure the strength of the entire liquid cooling plate 100, making it highly practical.

[0072] Secondly, this application also provides a battery pack, including a battery and a liquid cooling plate 100 as described above, the liquid cooling plate 100 being attached to the surface of the battery.

[0073] This battery pack possesses all the beneficial effects of the aforementioned liquid cooling plate 100:

[0074] In the embodiments of this utility model, by providing a rib 112 on the body 111, the strength of the liquid cooling plate 100 can be enhanced. At the same time, the rib 112 is provided with a free end 113, and the free end 113 is provided with at least one of a starting frustum 114 and a retracting frustum 115. Therefore, during the connection process between the rib 112 and the plate 120, the rib 112 can serve as a connection trajectory, and the starting frustum 114 and the retracting frustum 115 can increase the contact area between the rib 112 and the plate 120, thereby avoiding perforation at the connection start point and connection end point, thus preventing liquid leakage of the liquid cooling plate 100, reducing the defect rate of the liquid cooling plate 100, and ensuring the normal use of the liquid cooling plate 100.

[0075] In summary, in this embodiment, the liquid cooling plate 100 is attached to the surface of the battery, and coolant is injected into the liquid cooling channel 130 through the water inlet 160. The coolant flows through the liquid cooling channel 130 and is diverted by the second rib 1122. Therefore, when the coolant flows through the liquid cooling channel 130, it can impact the first rib 1121 and the second rib 1122. The second rib 1122 diverts the coolant, which better prolongs the flow time of the coolant through the liquid cooling plate 100. At the same time, it can quickly remove the heat from the battery surface, control the battery temperature within a suitable range, extend the battery's service life, and ensure the normal use of the battery.

[0076] Furthermore, the liquid cooling plate 100 consists of only two components: the main plate 110 and the flat plate 120. The structure is simple, and there are fewer welding parts on the main plate 110 and the flat plate 120, which greatly reduces the defect rate of the liquid cooling plate 100 and can also ensure the strength of the entire liquid cooling plate 100, making it highly practical.

[0077] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A liquid-cooled plate, characterized in that, include: A main plate, comprising a body and a protruding rib, the protruding rib protruding from the body, the protruding rib having a free end, and the free end having at least one of a starting frustum and a ending frustum, the starting frustum and the ending frustum being used as the starting point and ending point of welding, respectively; and... A flat plate is connected to the side of the rib facing away from the body, and forms a liquid cooling channel between it and the main plate.

2. The liquid cooling plate according to claim 1, characterized in that, The main body plate also includes an outer frame protruding from the body, the protruding rib is located within the space enclosed by the outer frame, and the outer frame is connected to the plate.

3. A liquid-cooled plate according to claim 2, characterized in that, The rib includes at least a first rib and a second rib. The first rib has two opposite ends, and both ends of the first rib are free ends. The second rib has a first end and one or more second ends. The first end is connected to the outer frame, and the second end is a free end.

4. A liquid cooling plate according to claim 3, characterized in that, The first rib is bent.

5. A liquid-cooled plate according to claim 3, characterized in that, The first rib is bent and forms a liquid-cooled cavity on the body for coolant flow. A plurality of second ribs are arranged opposite each other, and the second ribs extend at least partially into the liquid-cooled cavity to achieve coolant diversion.

6. A liquid-cooled plate according to claim 1, characterized in that, The rib comprises multiple straight segments, with two connected straight segments extending in different directions. The starting and ending truncated cones are connected to the straight segments, and the diameters of the starting and ending truncated cones are greater than the width of the straight segments.

7. A liquid-cooled plate according to claim 6, characterized in that, The intersection of the connected straight line segments protrudes towards the angle between the two straight line segments.

8. A liquid cooling plate according to claim 1, characterized in that, The rib includes multiple straight segments and bent segments. The bent segments are located at the intersection of two straight segments and protrude toward the included angle of the two straight segments.

9. A liquid cooling plate according to claim 8, characterized in that, The starting and ending rotary tables are connected to the straight segment, and the diameters of the starting and ending rotary tables are greater than the width of the straight segment.

10. A liquid-cooled plate according to claim 6 or 9, characterized in that, The diameters of the starting and ending cones are 15mm to 25mm, and the width of the protruding rib is 10mm to 16mm.

11. A liquid-cooled plate according to claim 2, characterized in that, The outer frame has a first opening, the opening direction of the first opening is perpendicular to the body, and the first opening is used to connect and fix the first device.

12. A liquid-cooled plate according to claim 2, characterized in that, The outer frame has a second opening, the opening direction of which is parallel to the body, and the second opening is used to connect and fix the first device.

13. A liquid-cooled plate according to claim 2, characterized in that, The outer frame is also provided with a water inlet and a water outlet, which are respectively connected to the liquid cooling channel.

14. A liquid-cooled plate according to claim 13, characterized in that, The inner diameter of the water inlet is 8mm to 12mm, and / or the inner diameter of the water outlet is 8mm to 12mm.

15. A liquid-cooled plate according to claim 1, characterized in that, The rib and the flat plate are connected by friction stir welding.

16. A battery pack, characterized in that, It includes a battery and a liquid cooling plate as claimed in any one of claims 1-15, the liquid cooling plate being attached to the surface of the battery.

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