Liquid cooling plate and battery pack

Abstract

The utility model provides a liquid cooling plate and a battery pack. The liquid cooling plate is provided with a liquid inlet and a liquid outlet; at least two parallel cooling channels are formed in the liquid cooling plate, one end of each cooling channel is communicated with the liquid inlet, and the other end of each cooling channel is communicated with the liquid outlet; the liquid cooling plate is further internally provided with a flow dividing structure, and the flow dividing structure is arranged between the liquid inlet and the multiple cooling channels and used for distributing cooling liquid introduced through the liquid inlet into the multiple cooling channels according to the set flow. In the technical scheme, the plurality of parallel cooling channels are arranged between the liquid inlet and the liquid outlet, so that the temperature difference of cooling liquid at the liquid outlet and the liquid inlet is reduced, and the cooling effect of the cooling liquid on batteries at different parts is more uniform, namely the cooling effect of the liquid cooling plate on the batteries at different parts is more uniform; the battery cooling device is applied to cooling batteries in a battery pack, and can reduce the temperature difference between the batteries and reduce the adverse effect on the battery performance.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a liquid cooling plate and a battery pack. Background Art

[0002] Indirect contact liquid cooling is the main cooling method currently used for energy storage batteries. A liquid cooling plate is placed at the bottom of the battery pack. A serpentine cooling chamber is provided inside the liquid cooling plate. Both ends of the cooling chamber extend to the ends of the liquid cooling plate. Liquid inlets and outlets are provided at the ends of the liquid cooling plate and connected to the cooling circulation system to realize the circulation of the coolant and cooling of the battery.

[0003] With the development of battery technology, the application of longer packs with higher energy density has become more and more extensive, and the length of the liquid cooling plate has also increased accordingly. The length of the flow path in the cooling cavity in the liquid cooling plate has also become longer. In the process from the coolant entering the cooling cavity to the final discharge from the cooling cavity, heat exchange occurs between the coolant and the battery. The closer to the liquid outlet, the higher the temperature of the coolant, and the cooling effect on the battery in the corresponding position also decreases accordingly, which eventually leads to a large temperature difference between batteries in different positions, making it difficult to maintain the synchronization of the performance of multiple batteries, resulting in a decline in the overall performance of the battery pack. Utility Model Content

[0004] The present application provides a liquid cooling plate and a battery pack, which improve the uniformity of cooling multiple batteries in a battery pack, reduce the temperature difference between batteries, and improve the performance of the battery pack.

[0005] In a first aspect, the present application provides a liquid cooling plate, wherein the liquid cooling plate is provided with a liquid inlet and a liquid outlet;

[0006] At least two parallel cooling channels are provided in the liquid cooling plate, one end of the cooling channel is connected to the liquid inlet, and the other end is connected to the liquid outlet;

[0007] A flow dividing structure is also provided in the liquid cooling plate. The flow dividing structure is arranged between the liquid inlet and the plurality of cooling channels, and is used to distribute the coolant introduced through the liquid inlet to the plurality of cooling channels according to a set flow rate.

[0008] In the above technical solution, a plurality of parallel cooling channels are arranged between the liquid inlet and the liquid outlet. Compared with the existing liquid cooling plate in which a single cooling channel connects the liquid inlet and the liquid outlet, the temperature difference of the coolant at the liquid outlet and the liquid inlet is reduced, and the cooling effect of the coolant on batteries in different parts is more uniform, that is, the cooling effect of the liquid cooling plate on batteries in different parts is more uniform. It is applied to cool the batteries in the battery pack, which can reduce the temperature difference between the batteries and reduce the adverse effects on the battery performance.

[0009] In a specific embodiment, there are two cooling channels;

[0010] The liquid inlet and the liquid outlet are respectively located in the middle of two opposite sides of the liquid cooling plate;

[0011] The connection line between the liquid inlet and the liquid outlet divides the liquid cooling plate into two parts;

[0012] The two cooling channels are respectively located in the two subsections.

[0013] In the above technical solution, the two cooling channels are respectively responsible for cooling the batteries corresponding to the two divisions, reducing the temperature rise of the coolant from flowing into the liquid cooling plate to discharging from the liquid cooling plate, and at the same time allowing the coolant to remain in the cooling channel for a sufficiently long time to fully utilize the coolant.

[0014] In a specific embodiment, the flow splitting structure is provided with an inlet and two outlets;

[0015] The inlet is connected to the liquid inlet, and the two outlets are connected to the two cooling channels in a one-to-one correspondence;

[0016] The coolant introduced from the inlet is evenly distributed to the two outlets.

[0017] In the above technical solution, the flow rate of the coolant introduced into the two cooling channels is the same, which ensures the synchronization of cooling the corresponding batteries in the two divisions, and is conducive to improving the uniformity of cooling the multiple batteries.

[0018] In a specific implementation scheme, the liquid inlet and the liquid outlet are respectively located in the middle of two opposite sides of the liquid cooling plate;

[0019] The flow-dividing structure comprises a separator, and a flow-dividing cavity is formed between the separator and the liquid inlet;

[0020] There are multiple cooling channels, which lead from the diversion cavity to the liquid outlet;

[0021] The separator is provided with a plurality of flow diversion holes, and each of the cooling channels is communicated with the flow diversion cavity through the corresponding flow diversion hole.

[0022] In the above technical solution, the temperature of the coolant changes little during the entire process of flowing through the liquid cooling plate, and the cooling efficiency of batteries in different positions tends to be the same, thereby improving the uniformity of cooling multiple batteries. The flow rate of the coolant entering the multiple cooling channels is regulated by the set diverter holes. In actual design, the flow rate of the coolant entering the corresponding cooling channel can be adjusted by changing the size of the diverter holes, which makes it easier to adjust the flow rate.

[0023] In a specific possible implementation scheme, a liquid collecting cavity connected to the liquid outlet is provided in the liquid cooling plate;

[0024] The plurality of cooling channels are all communicated with the liquid collecting chamber.

[0025] In the above technical solution, there is no need to bend and extend the end of the cooling channel close to the liquid outlet toward the liquid outlet, and the liquid enters the collecting cavity and is uniformly discharged from the liquid outlet, which simplifies the design of the cooling channel inside the liquid cooling plate and can reduce design and production costs.

[0026] In a specific possible implementation manner, the sizes of the plurality of diversion holes decrease sequentially from the middle to both sides in the arrangement direction.

[0027] In the above technical aspect, by setting different diversion hole sizes, it is more convenient to control the flow of coolant in the middle cooling channel to be larger, and the flow in multiple cooling channels arranged from the middle to both sides decreases successively; applied to the battery pack, the cooling rate of the battery in the middle of the battery pack is faster. Combined with the fact that the battery in the middle of the battery pack has a higher temperature than the battery on the side, by adjusting the flow of coolant in the cooling channels in different areas of the liquid cooling plate, the temperature of the battery in the middle can be made to be the same as the temperature of the battery on the side, thereby reducing the temperature difference.

[0028] In a specific possible implementation manner, the extension direction of the cooling channel is parallel to the extension direction of the line connecting the liquid inlet and the liquid outlet.

[0029] In the above technical solution, the temperature difference between the coolant at the liquid outlet and the liquid inlet can be minimized to the greatest extent, and the stability of the heat exchange efficiency between the coolant and the outside world can be maintained during the entire flow of the coolant in the cooling channel.

[0030] In a specific possible implementation manner, a plurality of spoiler bosses are provided on the inner wall of the cooling channel.

[0031] In the above technical solution, the coolant in the cooling channel is "stirred" by the spoiler boss, so as to avoid the situation that only the outer part of the coolant in the cooling channel participates in heat exchange while the internal coolant is not fully utilized. The coolant is allowed to alternate inside and outside during the flow process, thereby improving the cooling efficiency of the coolant and making the cooling efficiency of the liquid cooling plate higher.

[0032] In a specific possible implementation scheme, the liquid cooling plate has a large rectangular surface, including two parallel first sides and two parallel second sides;

[0033] The length of the first side is greater than the length of the second side;

[0034] The liquid inlet and the liquid outlet are respectively located on one side of the liquid cooling plate where the two first side edges are located.

[0035] In the above technical solution, the liquid inlet and the liquid outlet are arranged on the side where the long side of the liquid cooling plate is located. Compared with being arranged on the side where the short side is located, when the liquid cooling plate is applied to a battery pack of the same specification, the size of the liquid cooling plate in the length direction can be reduced to a certain extent without affecting the cooling effect on the battery, that is, the mass of the liquid cooling plate is reduced, which can improve the energy density of the battery pack.

[0036] In a second aspect, the present application further provides a battery pack, comprising a plurality of batteries and a liquid cooling plate as described in any one of the above items;

[0037] A plurality of batteries are thermally connected to the large surface of the liquid cooling plate.

[0038] In the above technical solution, by adopting the corresponding liquid cooling plate, the temperature difference between the coolant at the liquid outlet and the liquid inlet is reduced, the cooling of multiple batteries in the battery pack is more uniform, the temperature difference between different batteries is reduced, and the overall performance of the battery pack is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the overall structure of a battery pack provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of a liquid cooling plate provided in an embodiment of the present application;

[0041] Figure 3 One of the cooling channel layout structures provided in the embodiments of the present application;

[0042] Figure 4 Provided in the embodiments of this application Figure 3 A magnified schematic diagram of part A;

[0043] Figure 5 One of the cooling channel layout structures provided in the embodiments of the present application;

[0044] Figure 6 Provided in the embodiments of this application Figure 5 Schematic diagram of the enlarged portion B.

[0045] Explanation of the accompanying drawings: 1. Box body; 2. Battery; 3. Liquid cooling plate; 31. Liquid inlet; 32. Liquid outlet; 33. Cooling channel; 34. Liquid collecting chamber; 3a. First side; 3b. Second side; 4. Diverter structure; 41. Separator; 42. Diverter chamber; 43. Diverter hole; 5. Spoiler boss. DETAILED DESCRIPTION

[0046] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0047] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0048] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0049] To facilitate understanding of the liquid cooling plate and battery pack provided in the embodiments of the present application, the structure of the battery pack is briefly described. The battery pack includes a box body, multiple batteries and a liquid cooling plate. The multiple batteries are arranged in an array in the box body. The liquid cooling plate is located between the batteries and the bottom of the box body and is thermally connected to the multiple batteries. A cooling channel is provided in the liquid cooling plate, and liquid inlet and outlet ports connected to the cooling channel are provided at the end of the liquid cooling plate. Cooling liquid is introduced into the cooling channel to cool the batteries.

[0050] However, the cooling channel in the existing liquid cooling plate extends in a serpentine shape, with its two ends respectively connected to the liquid inlet and the liquid outlet. As the coolant circulates in the cooling channel, heat exchange continues with the battery to cool the battery. The closer to the liquid outlet, the higher the temperature of the coolant, and the worse the cooling effect on the battery. The longer the cooling channel is, the more obvious this problem is, especially for a long pack (long battery pack). This problem is more prominent.

[0051] Due to the difference in cooling effect on the battery caused by the temperature change of the coolant, the temperature of the batteries in different areas of the battery pack will eventually be different. When the batteries are in different temperature environments for a long time, their charging and discharging efficiency will be affected differently. This cycle will cause different batteries to age to different degrees as the usage time increases, the overall performance of the battery pack will decline, and the service life will also be shortened to a certain extent.

[0052] The embodiment of the present application provides a liquid cooling plate, namely a battery pack, which improves the uniformity of cooling multiple batteries in the battery pack, reduces the temperature difference between the batteries, and improves the performance of the battery pack. The following is a detailed description of the liquid cooling plate in conjunction with specific drawings and embodiments.

[0053] refer to Figure 1 , Figure 1The schematic diagram of the structure of the battery pack 2 provided in the embodiment of the present application is shown. The battery pack 2 provided in the embodiment of the present application includes a box body 1 and a plurality of batteries 2 and a liquid cooling plate 3 located in the box body 1. The plurality of batteries 2 are arranged in an array in the box body 1. The liquid cooling plate 3 is located between the battery 2 and the bottom of the box body 1. The liquid cooling plate 3 and the battery 2 are thermally connected, and the battery 2 is cooled by heat exchange between the two. In addition, various electrical components are also provided to realize the connection between the plurality of batteries 2, and to collect information such as the temperature of the battery 2, the battery 2, and the voltage of the battery 2. This part belongs to the content well known to those skilled in the art and will not be repeated in this application.

[0054] refer to Figure 2 and Figure 3 The liquid cooling plate 3 is provided with a liquid inlet 31 and a liquid outlet 32 ​​for connecting with an external cooling liquid circulation system; at least two parallel cooling channels 33 are provided in the liquid cooling plate 3, one end of the cooling channel 33 is connected with the liquid inlet 31, and the other end is connected with the liquid outlet 32. Among them, the external cooling liquid circulation system is a structure conventionally used in the art for liquid cooling of the battery pack 2, which is used to pass the cooling liquid into the cooling channel 33, and cool and reduce the temperature from the outlet 32 ​​to remove the heat of the battery 2, and this application will not describe this part of the content.

[0055] refer to Figure 3 and Figure 4 A flow dividing structure 4 is also provided in the liquid cooling plate 3. The flow dividing structure 4 is provided between the liquid inlet 31 and the plurality of cooling channels 33, and is used to distribute the coolant introduced through the liquid inlet 31 to the plurality of cooling channels 33 according to a set flow rate. The coolant is distributed to the plurality of cooling channels 33 through the flow dividing effect of the flow dividing structure 4, forming a plurality of parallel flow channels between the liquid inlet 31 and the liquid outlet 32.

[0056] The set flow rate is obtained by those skilled in the art based on the specific structure and size of the battery pack 2, the cooling effect of the coolant, and other known conditions. It should be understood that the parallel here does not mean that the cooling channels 33 are parallel to each other, but that the coolant flows synchronously from the liquid inlet 31 to the liquid outlet 32 ​​through multiple cooling channels 33.

[0057] The coolant is introduced into the liquid cooling plate 3. After the coolant is divided, it flows from the liquid inlet 31 to the liquid outlet 32 ​​through multiple parallel channels. Compared with the existing cooling channel 33 in which both ends are connected to the liquid inlet 31 and the liquid outlet 32 ​​respectively, the temperature difference of the coolant at the liquid outlet 32 ​​and the liquid inlet 31 is reduced, that is, the difference in cooling effect of the coolant on the battery 2 at different positions is reduced, the uniformity of the temperature of multiple batteries 2 is improved, and the overall performance of the battery 2 package is improved.

[0058] In addition, a diversion structure 4 is provided in the liquid cooling plate 3 to adjust the flow rate of the coolant entering each cooling channel 33. The flow rate of the coolant can be adjusted according to factors such as the length and position of the cooling channel 33, thereby further improving the uniformity of cooling the multiple batteries 2 and improving the overall performance of the battery pack 2.

[0059] refer to Figure 3 The liquid cooling plate 3 is a rectangular parallelepiped structure, and the large surface of the liquid cooling plate 3 (the surface in contact with the battery 2) is rectangular, including two parallel first side edges 3a and two parallel second side edges 3b, and the length of the first side edge 3a is greater than the length of the second side edge 3b. The liquid inlet 31 and the liquid outlet 32 ​​are respectively located in the middle of the side of the liquid cooling plate 3 where the first side edge 3a is located.

[0060] The liquid inlet 31 and the liquid outlet 32 ​​are arranged on the first side 3a. Compared with the situation in which they are arranged on the second side 3b in the existing structure, the size of the liquid cooling plate 3 in the length direction can be reduced to a certain extent without affecting the cooling effect on the battery 2, that is, the mass of the liquid cooling plate 3 is reduced, and the energy density of the battery 2 pack can be improved.

[0061] Specifically, it is understood that the liquid inlet 31 and the liquid outlet 32 ​​need to penetrate the box body 1 to the outside of the box body 1. If the liquid inlet 31 and the liquid outlet 32 ​​are located on the second side 3b, it is necessary to ensure that one side of the second side 3b of the liquid cooling plate 3 is in contact with the side wall of the box body 1. In the battery pack 2, an end plate is generally provided between the battery 2 on the side where the second side 3b is located and the side wall of the box body 1. Then the part of the liquid cooling plate 3 corresponding to the end plate cannot cool the battery 2. However, because it is necessary to ensure that the liquid inlet 31 and the liquid outlet 32 ​​penetrate the side wall of the box body 1 to the outside, if a gap is left between the side where the second side 3b of the liquid cooling plate 3 is located and the side wall corresponding to the box body 1, it is not convenient for the liquid inlet 31 and the liquid outlet 32 ​​to be connected to the outside; if a pipe is used to connect to the liquid cooling plate 3 across the gap, the end plate directly abuts against the pipe across the gap, which is also easy to cause pipe deformation and damage to the connection.

[0062] The liquid inlet 31 and the liquid outlet 32 ​​are arranged on the first side 3a, and the side where the first side 3a of the liquid cooling plate 3 is located is directly attached to the side wall of the box 1, so that the liquid inlet 31 and the liquid outlet 32 ​​are conveniently led out to the outside of the box 1; at this time, a gap can be left between the side where the second side 3b of the liquid cooling plate 3 is located and the side wall of the box 1. That is, the size of the liquid cooling plate 3 is reduced, and the energy density of the battery pack 2 is improved.

[0063] Of course, in actual design and use, there is a certain deviation between the liquid inlet 31 and the liquid outlet 32 ​​and the midpoint of the first side 3a, or the liquid inlet 31 and the liquid outlet 32 ​​can also be set on the second side 3b.

[0064] In one embodiment, reference Figure 3 The line between the liquid inlet 31 and the liquid outlet 32 ​​divides the liquid cooling plate 3 into two parts; there are two cooling channels 33, which are respectively located in the two parts, and the cooling channels 33 extend in a serpentine shape in the corresponding parts. The flow splitting structure 4 is provided with an inlet and two outlets, the inlet is connected to the liquid inlet 31, and the two outlets are respectively connected to the two cooling channels 33 in a one-to-one correspondence, and the coolant introduced from the inlet is evenly distributed to the two outlets, that is, the flow rate of the coolant in the two cooling channels 33 is kept the same.

[0065] Two cooling channels 33 are provided to cool the batteries 2 corresponding to the two divisions respectively. When the coolant is discharged from the liquid outlet 32, the heat absorbed is equivalent to half of the heat absorbed in the existing liquid cooling plate 3 structure, thereby reducing the temperature difference between the batteries 2 and improving the temperature uniformity of the multiple batteries 2.

[0066] In addition, setting the flow rate of the coolant distributed in the two cooling channels 33 to be the same is also conducive to ensuring the uniformity of cooling the battery 2 and is more conducive to reducing the temperature difference between the batteries 2.

[0067] In another embodiment, reference Figure 5 and Figure 6 The diversion structure 4 includes a separator 41, which is arranged parallel to the side wall where the liquid inlet 31 is located, and a diversion cavity 42 is formed between the separator 41 and the liquid inlet 31; there are multiple cooling channels 33, and the multiple cooling channels 33 lead from the diversion cavity 42 to the liquid outlet 32; a plurality of diversion holes 43 are opened on the separator 41, and each cooling channel 33 is connected to the diversion cavity 42 through the corresponding diversion hole 43.

[0068] During the cooling process, the coolant flows into the diversion cavity 42 through the liquid inlet 31 , is diverted into a plurality of cooling channels 33 through each diversion hole 43 , and is finally discharged from the liquid outlet 32 ​​.

[0069] Exemplarily, the extension direction of the cooling channel 33 is parallel to the connection direction of the liquid inlet 31 and the liquid outlet 32, so that the temperature difference of the coolant at the liquid outlet 32 ​​and the liquid inlet 31 can be minimized to the greatest extent, and the temperature uniformity of multiple batteries 2 can be improved. It should be noted that in actual design, the extension direction of the cooling channel 33 and the connection direction of the liquid inlet 31 and the liquid outlet 32 ​​can have a certain inclination angle, and it is still considered that the extension direction is parallel to the connection direction, but the inclination angle needs to be guaranteed not to exceed the limit value, and exemplary, the inclination angle is less than 30°.

[0070] Of course, in this embodiment, the cooling channel 33 may also be arranged to be serpentine in order to slow down the speed of the coolant flowing through the cooling channel 33 and make full use of the coolant to avoid the coolant flowing too fast and failing to fully utilize it.

[0071] In addition, by setting multiple diverter holes 43 of different sizes, the flow rate of the coolant diverted to multiple cooling channels 33 can be adjusted; illustratively, for the existing battery 2 pack structure, the heat dissipation rate of the battery 2 located on the side is greater than the heat dissipation rate of the battery 2 located in the middle. Therefore, the heat dissipation heat of the battery 2 in the middle area of ​​the battery 2 pack is greater. When setting the diverter holes 43, the size of the diverter holes 43 located in the middle is larger, and the sizes of the multiple diverter holes 43 in the direction of extension to both sides decrease successively.

[0072] In this way, after the coolant enters the liquid cooling plate 3, the coolant flow rate in the cooling channel 33 located in the middle is greater than the coolant flow rate in the multiple cooling channels 33 on both sides, thereby increasing the cooling speed of the coolant on the central battery 2, which is beneficial to improving the uniformity of the temperature of multiple batteries 2.

[0073] If the end plate of the liquid cooling plate 3 is used to pass the coolant into the liquid cooling plate 3 (in the diverter cavity 42), the flow rate of the coolant in the diverter cavity 42, which passes through the multiple diverter holes 43 (cooling channels 33) in sequence, increases first and then decreases. In the embodiment of the present application, the liquid inlet 31 is located in the middle of the first side 3a, and the coolant is distributed from the middle to both sides. The distribution and flow of the coolant are symmetrical about the middle of the liquid cooling plate. Compared with the method of passing the coolant from the end, it is more convenient to distribute the coolant in each cooling channel 33.

[0074] A liquid collecting cavity 34 connected to the liquid outlet 32 ​​is also provided in the liquid cooling plate 3, and a plurality of cooling channels 33 are connected to the liquid collecting cavity 34. The coolant flows out of the cooling channel 33 and is discharged into the liquid collecting cavity 34, and then is discharged from the liquid outlet 32. If each cooling channel 33 is directly connected to the liquid outlet 32, the shape and extension direction of each cooling channel 33 need to be more complicatedly designed. However, the liquid collecting cavity 34 can simplify the overall structure and reduce the design and production costs.

[0075] For the cooling channel 33 provided in the liquid cooling plate 3 of the present embodiment, refer to Figure 3 and Figure 5 A plurality of spoiler bosses 5 are provided on the side wall of the cooling channel 33 ; illustratively, the spoiler bosses 5 are integrally formed with the liquid cooling plate 3 .

[0076] By means of the spoiler boss 5, the coolant needs to bypass the spoiler boss 5 when flowing in the cooling channel 33, so that the coolant is in an "active" state in the cooling channel 33, that is, by means of the spoiler boss 5, the coolant flows relative to the liquid cooling plate 3 while the inner and outer liquids are in an exchange state. Compared with the situation where the inner wall of the cooling channel 33 is smooth, the situation where the coolant is always on the outer side (especially the side closer to the battery 2) to release the liquid cooling plate 3 is avoided. The coolant alternates between the inside and the outside, avoiding the problem that only the outer part of the coolant in the cooling channel 33 generates heat exchange with the battery 2, while the heat exchange efficiency between the inner part and the battery 2 is low, thereby improving the utilization rate of the coolant.

[0077] In addition, the battery pack 2 illustrated in the present application is a rectangular battery pack 2, and correspondingly, the liquid cooling plate 3 used is a rectangular (the large surface is rectangular); in actual use, there may be certain differences in the specific shapes, and it is only necessary to make adaptive adjustments to the shapes involved in the present technical solution.

[0078] Exemplarily, the large surface of the liquid cooling plate 3 is pentagonal, and the liquid inlet 31 can be set at one of the vertices, and the liquid outlet 32 ​​is set in the middle of the side opposite to the above vertex; in an embodiment where a diverter cavity 42 is set, the diverter cavity 42 extends along the two side edges adjacent to the vertex where the liquid inlet 31 is located.

[0079] The large surface of the liquid cooling plate 3 is circular, and the liquid inlet 31 and the liquid outlet 32 ​​can be arranged on two opposite sides; correspondingly, in the embodiment of setting the diverter cavity 42, the diverter cavity 42 is arranged to extend to both sides along the position of the liquid inlet 31 on the liquid cooling plate 3, and the diverter cavity 42 corresponds to 1 / 2 of the outer circle of the large circular structure of the liquid cooling plate 3.

[0080] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of the present application. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0081] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense; in addition, the term "a plurality" in this application refers to two or more. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] The present application has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, various replacements and improvements may be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A liquid cooling plate, characterized in that: The liquid cooling plate is provided with a liquid inlet and a liquid outlet; At least two parallel cooling channels are provided in the liquid cooling plate, one end of the cooling channel is connected to the liquid inlet, and the other end is connected to the liquid outlet; A flow distribution structure is also provided in the liquid cooling plate. The flow distribution structure is arranged between the liquid inlet and the plurality of cooling channels, and is used to distribute the coolant introduced through the liquid inlet to the plurality of cooling channels according to a set flow rate.

2. The liquid cooling plate according to claim 1, characterized in that: There are two cooling channels; The liquid inlet and the liquid outlet are respectively located in the middle of two opposite sides of the liquid cooling plate; The connection line between the liquid inlet and the liquid outlet divides the liquid cooling plate into two parts; The two cooling channels are respectively located in the two subsections.

3. The liquid cooling plate according to claim 2, characterized in that: The diversion structure is provided with an inlet and two outlets; The inlet is connected to the liquid inlet, and the two outlets are connected to the two cooling channels in a one-to-one correspondence; The coolant introduced from the inlet is evenly distributed to the two outlets.

4. The liquid cooling plate according to claim 1, characterized in that: The liquid inlet and the liquid outlet are respectively located in the middle of two opposite sides of the liquid cooling plate; The flow-dividing structure comprises a separator, and a flow-dividing cavity is formed between the separator and the liquid inlet; There are multiple cooling channels, which lead from the diversion cavity to the liquid outlet; The separator is provided with a plurality of flow diversion holes, and each of the cooling channels is communicated with the flow diversion cavity through the corresponding flow diversion hole.

5. The liquid cooling plate according to claim 4, characterized in that: The liquid cooling plate is provided with a liquid collecting cavity connected with the liquid outlet; The plurality of cooling channels are all communicated with the liquid collecting chamber.

6. The liquid cooling plate according to claim 4, characterized in that: The sizes of the plurality of diversion holes decrease sequentially from the middle to both sides in the arrangement direction.

7. The liquid cooling plate according to claim 4, characterized in that: The extending direction of the cooling channel is parallel to the extending direction of the line connecting the liquid inlet and the liquid outlet.

8. The liquid cooling plate according to claim 1, characterized in that: The inner wall of the cooling channel is provided with a plurality of spoiler bosses.

9. The liquid cooling plate according to any one of claims 1 to 8, characterized in that: The large surface of the liquid cooling plate is rectangular, and includes two parallel first sides and two parallel second sides; The length of the first side is greater than the length of the second side; The liquid inlet and the liquid outlet are respectively located on one side of the liquid cooling plate where the two first side edges are located.

10. A battery pack, characterized in that: comprising a plurality of batteries and a liquid cooling plate as claimed in any one of claims 1 to 9; A plurality of batteries are thermally connected to the large surface of the liquid cooling plate.

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