Liquid cooling plate and battery

Abstract

The utility model provides a liquid cooling plate and battery, liquid cooling plate includes liquid cooling plate shell and first radiating fin group, liquid cooling plate shell is equipped with liquid cooling flow channel for cooling liquid to pass through, and also equipped with liquid inlet and liquid outlet communicated with liquid cooling flow channel, the first radiating fin group is set to be water wheel type, the first radiating fin group is set to be water wheel type, and the first radiating fin group is set to be water wheel type. The liquid cooling channel is used for enabling cooling liquid to form turbulent flow in the liquid cooling channel; according to the water-wheel-type first heat dissipation fin group, the cooling liquid can continuously rotate and collide in the first heat dissipation fin group to form a turbulent flow phenomenon, so that the pressure loss of the cooling liquid is reduced, the cooling liquid in the liquid cooling flow channel is uniformly mixed, and the temperature of each part of the battery is ensured to be uniformly reduced; in addition, the first heat dissipation fin group can also prolong the flowing length of the cooling liquid in the liquid cooling plate shell, enhance the cooling effect, ensure the cooling effect of the battery cell and improve the performance of the battery in the operation process, so that the problems that the performance of the battery is reduced and the service life of the battery is shortened due to insufficient cooling capacity of the liquid cooling plate in the related technology are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field, concretely relates to a liquid cooling panel and battery. BACKGROUND

[0002] In the related art, the working temperature of the battery deeply affects the performance of the battery, and the temperature of the battery rises during operation, so a cooling plate is needed to cool down. At present, most of the lithium battery cooling plates adopt air cooling, liquid cooling or phase change material cooling, among which liquid cooling is widely used due to its low cost. The liquid cooling plate for lithium battery in the related art pays more attention to the design of the flow channel and the adjustment of the inclination angle and size of the heat dissipation fins. However, the current liquid cooling plate has low heat dissipation efficiency and high power consumption, which causes the battery temperature to be too high or the temperature of each part to drop unevenly. Moreover, the liquid continuously absorbs heat during flow, which easily causes the temperature at the outlet to be higher than that at the inlet. This makes the cooling capacity of the liquid cooling plate insufficient, which is difficult to achieve the goal of cooling the battery, and causes harm to the performance and service life of the battery, resulting in a decrease in the performance and a shortening of the service life of the battery. SUMMARY

[0003] The embodiments of the utility model provide a liquid cooling plate and battery, can improve the technical problem of insufficient cooling capacity of liquid cooling plate, difficult to achieve the goal of cooling battery, cause harm to the performance and service life of battery, make the performance of battery decline, shorten the service life.

[0004] In a first aspect, the embodiments of the utility model provide a liquid cooling plate, comprising:

[0005] A liquid cooling plate shell is provided with a liquid cooling flow channel, the liquid cooling flow channel is used for passing through cooling liquid, and the liquid cooling plate shell is also provided with a liquid inlet and a liquid outlet in communication with the liquid cooling flow channel;

[0006] A first heat dissipation fin group is arranged in the liquid cooling flow channel, and the first heat dissipation fin group is arranged in a water wheel type to form a turbulent flow of cooling liquid in the liquid cooling flow channel.

[0007] In an embodiment, the first heat dissipation fin group comprises a plurality of first heat dissipation fins arranged at intervals, the plurality of first heat dissipation fins are arranged in a turbine shape around the same center, and a first liquid flow channel is formed between adjacent two first heat dissipation fins.

[0008] In an embodiment, a liquid cooling plate further comprises a second heat dissipation fin group, the second heat dissipation fin group is arranged in the liquid cooling flow channel and is different in shape from the first heat dissipation fin group.

[0009] In an embodiment, the second heat dissipation fin group is provided with at least two groups, the first heat dissipation fin group is arranged between the two groups of the second heat dissipation fin group, one of the second heat dissipation fin groups is arranged in the liquid cooling plate shell and close to one side of the liquid inlet, and the other of the second heat dissipation fin groups is arranged in the liquid cooling plate shell and close to one side of the liquid outlet.

[0010] In an embodiment, the second heat dissipation fin group comprises a plurality of second heat dissipation fins arranged at intervals, the second heat dissipation fins are arranged in a columnar shape, and a second liquid flow channel is formed between two adjacent second heat dissipation fins.

[0011] In an embodiment, a connecting piece and a heat dissipation fan are further included, the heat dissipation fan is arranged at an interval from the liquid cooling plate shell, one end of the connecting piece is connected to the liquid cooling plate shell, and the other end of the connecting piece is connected to the heat dissipation fan.

[0012] In an embodiment, the heat dissipation fan and the connecting piece are provided with two, the two connecting pieces are arranged on opposite sides of the liquid cooling plate shell, and each of the connecting pieces is connected to one of the heat dissipation fans.

[0013] In an embodiment, the liquid inlet and the liquid outlet are arranged on two sides of the liquid cooling plate shell extending in a length direction, respectively.

[0014] In an embodiment, the two heat dissipation fans are arranged on two sides of the liquid cooling plate shell extending in a width direction, respectively.

[0015] In an embodiment, the liquid inlet and the liquid outlet are each provided with three and in a one-to-one correspondence; the first heat dissipation fin group is provided with nine, and the nine first heat dissipation fin groups are arranged in a matrix.

[0016] In a second aspect, an embodiment of the utility model provides a battery, including electric core, shell and liquid cooling plate, the electric core and the liquid cooling plate are arranged in the shell, the liquid cooling plate is attached to the surface of the electric core.

[0017] The embodiment of the utility model has the beneficial effects that:

[0018] In the embodiment of the utility model, through setting first radiating fin group on liquid cooling flow channel in liquid cooling plate shell, and first radiating fin group is set to water wheel type, first radiating fin group of water wheel type can make cooling liquid when passing through first radiating fin group, cooling liquid will rotate and collide in first radiating fin group constantly, thereby forming turbulence phenomenon when flowing out of first radiating fin group, therefore can reduce pressure loss of cooling liquid, makes cooling liquid in liquid cooling flow channel mix evenly, avoids cooling liquid temperature at export to rise, to guarantee temperature even drop of each part of battery, in addition, first radiating fin group can also lengthen the flow length of cooling liquid in liquid cooling plate shell, lengthens the convection heat exchange process between liquid cooling plate and electric core, thereby enhancing cooling effect, namely can guarantee the cooling effect of liquid cooling plate to electric core, can improve the performance of battery in the operation process, thereby improving the technical problem of insufficient cooling capacity of liquid cooling plate in the related art, difficult to achieve the goal of cooling battery, causing harm to the performance and life of battery, making the performance of battery decline, life shortening. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment 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 for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0020] Figure 1 It is a three-dimensional schematic view of the liquid cooling plate provided in the first embodiment of the utility model;

[0021] Figure 2 It is a three-dimensional schematic view of the liquid cooling plate provided in the second embodiment of the utility model;

[0022] Figure 3 It is a three-dimensional schematic view of the liquid cooling plate provided in the third embodiment of the utility model;

[0023] Figure 4 It is a three-dimensional schematic view of the liquid cooling plate provided in the fourth embodiment of the utility model;

[0024] Figure 5 It is the connection schematic view of the liquid cooling plate shell and cover plate in the fourth embodiment of the utility model.

[0025] REFERENCE NUMERALS

[0026] 1, liquid cooling plate shell;11, liquid cooling flow channel;12, liquid inlet;13, liquid outlet;

[0027] 2, first radiating fin group;21, first radiating fin;22, first liquid flow channel;

[0028] 3. Second heat dissipation fin group; 31. Second heat dissipation fin; 32. Second liquid flow channel;

[0029] 4. Connecting piece;

[0030] 5. Heat dissipation fan;

[0031] 6. Cover plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described 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 specifically refer to the direction of the drawing in the drawings. And "inner" and "outer" refer to the outline of the device.

[0033] Referring to Figure 1 The present application provides a liquid cooling plate, which comprises a liquid cooling plate shell 1 and a first heat dissipation fin group 2.

[0034] The inner side wall surface of the liquid cooling plate shell 1 is provided with a liquid cooling flow channel 11, the liquid cooling flow channel 11 is used to pass through the cooling liquid, the liquid cooling plate shell 1 is also provided with a liquid inlet 12 and a liquid outlet 13 which are in communication with the liquid cooling flow channel 11, and the liquid inlet 12 and the liquid outlet 13 are oppositely arranged.

[0035] The first heat dissipation fin group 2 is arranged in the liquid cooling flow channel 11, the first heat dissipation fin group 2 is provided with multiple groups, and the multiple groups of the first heat dissipation fin group 2 are uniformly and spacedly arranged, the first heat dissipation fin group 2 is arranged in the form of a water wheel to form a turbulent flow of the cooling liquid in the liquid cooling flow channel 11.

[0036] In the embodiment of the utility model, through setting first radiating fin group 2 on liquid cooling flow channel 11 in liquid cooling plate shell 1, and first radiating fin group 2 is set as water wheel type, first radiating fin group 2 of water wheel type can make cooling liquid rotate and collide in first radiating fin group 2 when passing through first radiating fin group 2, thereby forming turbulence phenomenon when flowing out of first radiating fin group 2, therefore can reduce pressure loss of cooling liquid, makes cooling liquid in liquid cooling flow channel 11 mix evenly, avoids temperature rise of cooling liquid at outlet, to guarantee temperature of each part of battery to drop evenly, in addition, first radiating fin group 2 can also lengthen flow length of cooling liquid in liquid cooling plate shell 1, lengthens the convection heat transfer process between liquid cooling plate and battery cell, thereby enhancing cooling effect, that is, can guarantee cooling effect of liquid cooling plate on battery cell, can improve performance of battery in operation, thereby improving the technical problem of insufficient cooling capacity of liquid cooling plate in the related art, difficult to achieve the goal of cooling battery, causing harm to the performance and life of battery, making the performance of battery decline, shortening the life.

[0037] In some embodiments, referring to Figure 1 As shown, the first radiating fin group 2 includes a plurality of first radiating fins 21 arranged at intervals, the plurality of first radiating fins 21 are arranged in a turbine shape around the same center, and a first liquid flow channel 22 is formed between adjacent two first radiating fins 21. Through the above arrangement, after the cooling liquid enters the liquid cooling plate shell 1, the cooling liquid will continuously collide with the wall surface of the first radiating fin 21 when passing through the first liquid flow channel 22, thereby forming a turbulence phenomenon when flowing out of the outlet end of the first radiating fin group 2, so that the cooling liquid flowing in the liquid flow channel is mixed evenly, and the phenomenon of uneven temperature drop of each part of the battery is avoided. In addition, compared with the radiating fins distributed in the conventional manner, the plurality of first radiating fins 21 arranged in a turbine shape around the same center can also increase the contact area between the cooling liquid and each first radiating fin 21, thereby lengthening the flow length of the cooling liquid in the liquid cooling plate shell 1, increasing the degree of convective heat transfer between the battery cell and the liquid cooling plate, and further enhancing the cooling effect of the liquid cooling plate.

[0038] In the embodiment, one first radiating fin group 2 includes at least seven first radiating fins 21, that is, one first radiating fin group 2 can form at least seven first liquid flow channels 22, thereby ensuring the collision between the cooling liquid and the first radiating fin 21 and reducing the pressure loss of the cooling liquid.

[0039] It can be understood that in specific use, the number of first radiating fins 21 can be adjusted, thereby adjusting the included angle between adjacent two first radiating fins 21, and further adjusting the degree of turbulence phenomenon of the cooling liquid when flowing out of the first radiating fin group 2, and further ensuring the liquid cooling effect of the liquid cooling plate.

[0040] In some embodiments, in order to improve the space utilization inside the liquid cooling plate shell 1, referring to Figure 2 , a liquid cooling plate further comprises a second heat dissipation fin group 3, which is arranged in the liquid cooling channel 11 and has a shape different from that of the first heat dissipation fin group 2.

[0041] It should also be noted that in the present embodiment, the second heat dissipation fin group 3 is arranged in a straight line type; of course, in other embodiments, other forms with different shapes can also be arranged according to actual use needs.

[0042] Therefore, in the present embodiment, the first heat dissipation fin group 2 arranged in the water wheel type and the second heat dissipation fin group 3 arranged in the common regular shape are combined, which further improves the cavity utilization inside the liquid cooling plate shell 1 and strengthens the heat dissipation capacity of the liquid cooling plate; at the same time, the arrangement of the first heat dissipation fin group 2 arranged in the water wheel type reduces the pressure loss of the cooling liquid and also prolongs the flow length of the cooling liquid inside the liquid cooling plate shell 1, so that the heat exchange capacity of the cooling liquid is further increased, the heat dissipation function of the liquid cooling plate is more uniform, and the liquid cooling effect is good.

[0043] In some embodiments, referring to Figure 2 , the second heat dissipation fin group 3 is provided with at least two groups, the first heat dissipation fin group 2 is arranged between the two groups of the second heat dissipation fin group 3, one of the second heat dissipation fin groups 3 is arranged in the liquid cooling plate shell 1 and close to one side of the liquid inlet 12, and the other of the second heat dissipation fin groups 3 is arranged in the liquid cooling plate shell 1 and close to one side of the liquid outlet 13. Therefore, when the cooling liquid enters from the liquid inlet 12, it can be first divided into multiple streams by the second heat dissipation fin group 3, and then flow into the first heat dissipation fin group 2, thereby increasing the collision between the cooling liquid and the first heat dissipation fin group 2, and ensuring that the cooling liquid can generate a turbulence phenomenon when flowing out of the first heat dissipation fin group 2; when the cooling liquid is about to flow out of the liquid cooling plate shell 1, it is again divided into multiple streams by the second heat dissipation fin group 3, so that the temperature of the cooling liquid is uniform, avoiding the temperature rise of the cooling liquid at the outlet, and ensuring the cooling capacity of the liquid cooling plate.

[0044] In some embodiments, referring to Figure 2As shown, the second heat dissipation fin group 3 comprises a plurality of second heat dissipation fins 31 arranged at intervals, the second heat dissipation fins 31 are arranged in a columnar shape, and a second liquid flow channel 32 is formed between adjacent two second heat dissipation fins 31. In this example, at least nine second heat dissipation fins 31 are provided in a group of the second heat dissipation fin group 3, that is, at least eight second liquid flow channels 32 can be formed in a group of the second heat dissipation fin group 3, cooperating with the inner wall surface of the two sides of the liquid cooling plate shell 1, the cooling liquid can be divided into ten streams, so that the cooling liquid can be uniformly dispersed when flowing into and out of the first heat dissipation fin group 2, thereby making the cooling liquid temperature at each position uniform, ensuring uniform heat dissipation of the battery cell and good cooling capacity.

[0045] It can be understood that in specific use, the number of second heat dissipation fins 31 can be adjusted to adjust the number of second liquid flow channels 32 formed, so as to adjust the dispersion degree of the cooling liquid when the cooling liquid flows out of the second heat dissipation fin group 3, and further ensure the liquid cooling effect of the liquid cooling plate.

[0046] In some embodiments, referring to Figure 3 As shown, the liquid cooling plate further comprises a connecting piece 4 and a heat dissipation fan 5, the heat dissipation fan 5 is arranged at intervals with the liquid cooling plate shell 1, one end of the connecting piece 4 is connected with the liquid cooling plate shell 1, and the other end of the connecting piece 4 is connected with the heat dissipation fan 5. When the liquid cooling plate of the present embodiment is applied in a square battery, the liquid cooling plate cannot dissipate heat to other surfaces of the square battery that cannot be contacted; therefore, by arranging the heat dissipation fan 5 on the liquid cooling plate shell 1, the air convection in the battery can be accelerated, the other surfaces of the square battery that cannot be contacted by the liquid cooling plate can be dissipated, thereby making up for the shortcomings of insufficient heat dissipation of the battery and further improving the heat dissipation capacity of the liquid cooling plate. In addition, the heat dissipation fan 5 is arranged at intervals with the liquid cooling plate shell 1, so that there is a gap between the heat dissipation fan 5 and the liquid cooling plate, which can prevent the heat dissipation fan 5 from interfering with the liquid cooling plate shell 1 during operation, and ensure the normal use of the liquid cooling plate.

[0047] In some embodiments, referring to Figure 4 As shown, the heat dissipation fan 5 and the connecting piece 4 are provided with two, two connecting pieces 4 are arranged on opposite sides of the liquid cooling plate shell 1, and one heat dissipation fan 5 is connected to each connecting piece 4. When the liquid cooling plate of the present embodiment is applied in a square battery, through the above arrangement, the other surfaces of the square battery cell that cannot be contacted by the liquid cooling plate can be dissipated by the heat dissipation fan 5, that is, the parts that cannot be closely attached to the liquid cooling plate can be more comprehensively dissipated, thereby improving the cooling effect of the liquid cooling plate.

[0048] It can be understood that in order to ensure the air convection effect, the two heat dissipation fans 5 are symmetrically arranged on the two sides of the liquid cooling plate shell 1.

[0049] In some embodiments, referring to Figures 1 to 4 As shown in the figure, the liquid inlet 12 and the liquid outlet 13 are respectively arranged on both sides of the liquid cooling plate shell 1 extending in the length direction. In this way, the flow length of the cooling liquid through the liquid cooling plate shell 1 can be longer, the degree of convective heat exchange between the liquid cooling plate and the battery cell can be increased, and the cooling capacity of the liquid cooling plate can be ensured.

[0050] In some embodiments, referring to Figures 1 to 4 As shown in the figure, two heat dissipation fans 5 are respectively arranged on both sides of the liquid cooling plate shell 1 extending in the width direction. In this way, when the liquid cooling plate of the present embodiment is used on a square battery, the two heat dissipation fans 5 can ensure to improve the air convection and heat dissipation of the parts that cannot be contacted by the liquid cooling plate; in addition, the two heat dissipation fans 5 will not interfere with the liquid inlet 12 and the liquid outlet 13, thereby ensuring the cooling effect of the liquid cooling plate.

[0051] In some embodiments, the liquid inlet 12 and the liquid outlet 13 are each provided with three and one-to-one correspondence; the first heat dissipation fin group 2 is provided with nine, and the nine first heat dissipation fin groups 2 are arranged in a matrix. Through the above arrangement, the nine first heat dissipation fin groups 2 form a three-row three-column matrix, which can correspond to the three liquid outlets 13 and the three liquid outlets 13, so as to ensure that the cooling liquid flowing through each part of the liquid channel will pass through the first heat dissipation fin group 2, that is, to ensure that the cooling liquid flowing through the outlet end can generate a turbulent flow phenomenon, thereby enhancing the cooling effect.

[0052] In the present embodiment, the cross section of the liquid inlet 12 and the liquid outlet 13 is square; of course, in other embodiments, the liquid inlet 12 and the liquid outlet 13 can also be provided in other shapes, such as circular, triangular or rectangular, etc.

[0053] In addition, in order to further ensure the cooling effect of the liquid cooling plate, the center of the liquid inlet 12 and the liquid outlet 13 and the center of the first heat dissipation fin group 2 opposite to it can be arranged on the same straight line. In this way, it can be ensured that the cooling liquid after being divided by the multiple liquid inlets 12 can flow to the center position of the first heat dissipation fin group 2,

[0054] It can be understood that, in the present embodiment, referring to Figure 5 As shown in the figure, in order to prevent the cooling liquid from flowing out from other parts of the liquid cooling plate shell 1, the cover plate 6 is arranged on the upper cover of the liquid cooling plate shell 1, and the liquid cooling plate shell 1 and the cover plate 6 are in sealing connection, which further prevents the cooling liquid from leaking and avoids damaging the battery cell, and also ensures the normal use of the liquid cooling plate and the cooling effect.

[0055] In a second aspect, the application also provides a battery, which comprises a battery cell, a shell and a liquid cooling plate, the battery cell and the liquid cooling plate are arranged in the shell, and the liquid cooling plate is attached to the surface of the battery cell.

[0056] The above has carried out the detailed introduction to the embodiment of the application, the principle and implementation mode of the application have been described in this paper by applying specific examples, and the above embodiment description is only used to help understand the method and core idea of the application; at the same time, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the application.

Claims

1. A liquid-cooled plate, characterized in that, The application relates to a liquid cooling plate, which comprises the following parts: a liquid cooling plate shell provided with a liquid cooling flow channel for passing cooling liquid, the liquid cooling plate shell being further provided with an inlet and an outlet communicating with the liquid cooling flow channel; a first set of heat dissipation fins arranged in the liquid cooling flow channel, the first set of heat dissipation fins being arranged in a water wheel type for forming a turbulent flow of the cooling liquid in the liquid cooling flow channel; wherein the first set of heat dissipation fins comprises a plurality of first heat dissipation fins arranged at intervals, the first heat dissipation fins being arranged in a turbine shape around the same center, and a first liquid flow channel being formed between two adjacent first heat dissipation fins.

2. The liquid cold plate of claim 1, wherein, The application further comprises a second set of heat dissipation fins, which is arranged in the liquid cooling flow channel and has a shape different from that of the first set of heat dissipation fins.

3. The liquid cold plate of claim 2, wherein, The second set of heat dissipation fins comprises at least two groups, and the first set of heat dissipation fins is arranged between the two groups of the second set of heat dissipation fins; one group of the second set of heat dissipation fins is arranged in the liquid cooling plate shell and close to one side of the inlet, and the other group of the second set of heat dissipation fins is arranged in the liquid cooling plate shell and close to one side of the outlet.

4. The liquid cold plate of claim 3, wherein, The second set of heat dissipation fins comprises a plurality of second heat dissipation fins arranged at intervals, the second heat dissipation fins being arranged in a column shape, and a second liquid flow channel being formed between two adjacent second heat dissipation fins.

5. The liquid cold plate of any of claims 1-4, wherein, The application further comprises a connecting piece and a heat dissipation fan, the heat dissipation fan being arranged at intervals with the liquid cooling plate shell, one end of the connecting piece being connected with the liquid cooling plate shell, and the other end of the connecting piece being connected with the heat dissipation fan.

6. The liquid cold plate of claim 5, wherein, The heat dissipation fan and the connecting piece are provided with two groups, and the two groups of the connecting pieces are arranged on opposite sides of the liquid cooling plate shell, and each of the connecting pieces is connected with one of the heat dissipation fans.

7. The liquid cold plate of any of claims 1-4, wherein, The inlet and the outlet are arranged on two sides of the liquid cooling plate shell extending along the length direction.

8. The liquid cold plate of claim 6, wherein, The two heat dissipation fans are arranged on two sides of the liquid cooling plate shell extending along the width direction.

9. The liquid cold plate of any of claims 1-4, wherein, The inlet and the outlet are provided with three groups and in one-to-one correspondence; the first set of heat dissipation fins is provided with nine groups, and the nine groups of the first set of heat dissipation fins are arranged in a matrix.

10. A battery, characterized by The application further relates to a battery, which comprises a battery core, a shell and a liquid cooling plate as claimed in any one of claims 1-9, the battery core and the liquid cooling plate being arranged in the shell, and the liquid cooling plate being attached to the surface of the battery core.

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