Liquid cooling plate and battery pack

Abstract

The utility model discloses a liquid cooling plate and a battery pack, a cooling flow channel is formed in the liquid cooling plate, the cooling flow channel is provided with an exhaust hole, and an exhaust valve is arranged at the exhaust hole and is used for automatically releasing gas in the liquid cooling plate. The exhaust valve is arranged at the exhaust hole of the cooling flow channel, the exhaust valve can actively release gas deposited in the cooling flow channel, a plugging structure does not need to be manually or electrically controlled, and the functions of automatic exhaust and automatic recovery are achieved. Compared with the technical scheme that an existing emptying structure needs to be blocked by a blocking piece after exhausting by means of an exhaust hole, the exhaust valve has the functions of automatic exhaust and automatic recovery, and the cooling efficiency of the liquid cooling plate is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a liquid cooling plate and a battery pack. Background Art

[0002] The existing cold plate flow channel causes local high temperature areas in the vacuum area and cannot play a cooling role. If vacuuming and adding coolant are not adopted, the gas in the cold plate cannot be discharged and will accumulate at the corner position, thus affecting the cooling efficiency.

[0003] In the related art, the existing cold plate filling generally adopts vacuum filling, which has high requirements on the filling equipment, and there is no self-exhaust structure on the cold plate. In addition, the emptying structure of the existing scheme relies on the exhaust hole, which needs to be sealed with a plugging piece after exhausting, and the operation is relatively complicated. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a liquid cooling plate, in which an exhaust valve is provided at the exhaust hole of the cooling channel, so that the gas accumulated in the cooling channel can be actively released without manual or electric control of the blocking structure, thereby realizing the function of self-exhaustion and automatic recovery.

[0005] The utility model further provides a battery pack.

[0006] According to the liquid cooling plate of the first aspect of the present invention, a cooling channel is formed in the liquid cooling plate, the cooling channel is provided with an exhaust hole, and the exhaust hole is provided with an exhaust valve for autonomously releasing the gas in the liquid cooling plate.

[0007] According to the liquid cooling plate of the embodiment of the utility model, by setting an exhaust valve at the exhaust hole of the cooling flow channel, the exhaust valve can actively release the gas accumulated in the cooling flow channel, without the need for manual or electric control of the blocking structure, to achieve the function of self-exhaustion and automatic recovery. Compared with the existing technical solution that the exhaust structure relies on the exhaust hole and needs to be blocked with a blocking piece after exhaust, the exhaust valve of the utility model has the function of self-exhaustion and self-recovery, thereby improving the cooling efficiency.

[0008] According to some embodiments of the utility model, the cooling flow channel includes: a diverter flow channel and a converging flow channel, a plurality of branch flow channels are provided between the diverter flow channel and the converging flow channel, the exhaust valve is provided at the connection between the diverter flow channel and the plurality of branch flow channels; and / or, the exhaust valve is provided at the connection between the converging flow channel and the plurality of branch flow channels; and / or, the exhaust valve is provided at the corner of the plurality of branch flow channels.

[0009] According to some embodiments of the utility model, there are multiple diverter channels and multiple converging channels, and the multiple diverter channels and the multiple converging channels are alternately arranged in sequence along the flow direction. The cooling channel is provided with a liquid outlet and a liquid inlet. The diverter channel closest to the liquid inlet is connected to the liquid inlet, and the converging channel closest to the liquid outlet is connected to the liquid outlet.

[0010] According to some embodiments of the present invention, the exhaust valve includes: a valve body and a semipermeable membrane arranged in the valve body, the valve body is provided with an air inlet hole and an air outlet hole, the air inlet hole is connected to the exhaust hole, and the semipermeable membrane allows the gas in the liquid cooling plate to pass through and be discharged from the air outlet hole.

[0011] According to some embodiments of the utility model, the exhaust valve further includes: a pressure plate, which is disposed in the valve body, the pressure plate is provided with a through hole opposite to the air outlet, and the pressure plate presses the semipermeable membrane onto one end of the valve body close to the air outlet.

[0012] According to some embodiments of the present utility model, the inner side wall of the valve body is provided with a groove, and the pressure plate and the semipermeable membrane are pressed into the groove.

[0013] According to some embodiments of the utility model, a mounting portion is provided at one end of the valve body close to the air inlet hole, the air inlet hole is provided on the mounting portion, and the mounting portion is installed and matched with the air exhaust hole.

[0014] According to some embodiments of the utility model, the liquid cooling plate includes: a first plate body and a second plate body arranged opposite to each other, the first plate body is arranged above the second plate body, the cooling channel is formed between the first plate body and the second plate body, and the exhaust hole is provided above the first plate body.

[0015] According to some embodiments of the present invention, a flow channel cavity is provided on the first plate body, which is away from the direction of the second plate body, and the second plate body is covered on the bottom of the first plate body to form the cooling flow channel.

[0016] According to the second aspect of the present invention, the battery pack comprises a plurality of battery cells and the liquid cooling plate, and the surfaces of the plurality of battery cells are in contact with the liquid cooling plate.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a three-dimensional diagram of a liquid cooling plate according to an embodiment of the utility model;

[0020] Figure 2 is a front view of a liquid cooling plate according to an embodiment of the utility model;

[0021] Figure 3 is an exploded view of a liquid cooling plate according to an embodiment of the utility model;

[0022] Figure 4 is a side view of a liquid cooling plate according to an embodiment of the utility model;

[0023] Figure 5 yes Figure 4 The enlarged schematic diagram of point A in the middle;

[0024] Figure 6 It is an exploded view of an exhaust valve according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] 100. Liquid cooling plate; 1. Cooling channel; 11. Exhaust hole; 12. Diverter channel; 13. Converging channel; 14. Branch channel; 15. Liquid inlet; 16. Liquid outlet; 2. Exhaust valve; 21. Valve body; 22. Semipermeable membrane; 23. Air inlet; 24. Air outlet; 25. Press plate; 27. Groove; 28. Mounting portion; 29. ​​Through hole; 3. First plate body; 4. Second plate body; 5. Water inlet pipe; 6. Water outlet pipe. DETAILED DESCRIPTION

[0027] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0028] Reference below Figure 1-Figure 6 A liquid cooling plate according to an embodiment of the present invention is described.

[0029] like Figure 1-Figure 6 As shown, a cooling channel 1 is formed in the liquid cooling plate 100 , and an exhaust hole 11 is provided in the cooling channel 1 . An exhaust valve 2 is provided at the exhaust hole 11 for autonomously releasing the gas accumulated in the liquid cooling plate 100 .

[0030] The liquid cooling plate 100 is provided with a water inlet pipe 5 and a water outlet pipe 6 connected to the cooling channel 1. During operation, the low-temperature coolant will enter the cooling channel 1 through the water inlet pipe 5 to exchange heat with the battery. The high-temperature coolant after the heat exchange is discharged from the water outlet pipe 6, taking away the heat generated by the battery, thereby cooling the battery.

[0031] Since the cooling channel 1 of the liquid cooling plate 100 may have a vacuum area at the branching, converging or corners, resulting in a local high temperature area, the gas in the liquid cooling plate 100 cannot be discharged and will accumulate at the corners, thereby affecting the cooling efficiency.

[0032] The utility model is provided with an exhaust valve 2 at the exhaust hole 11 of the cooling flow channel 1, and the exhaust valve 2 can actively release the gas accumulated in the cooling flow channel 1 without manual or electric control of the blocking structure, thereby realizing the functions of autonomous exhaust and automatic recovery.

[0033] Compared with the existing technical solution that relies on the exhaust hole 11 for exhaust and needs to be blocked with a blocking piece after exhaust, the exhaust valve 2 of the utility model has the functions of self-exhaustion and self-recovery, thereby improving the cooling efficiency of the liquid cooling plate 100.

[0034] The liquid cooling plate 100 of the present invention can be used to cool batteries, and of course can also be used to cool other devices.

[0035] Therefore, by setting the exhaust valve 2 at the exhaust hole 11 of the cooling channel 1, the exhaust valve 2 can actively release the gas accumulated in the cooling channel 1, without the need for manual or electric control of the blocking structure, to achieve the function of autonomous exhaust and automatic recovery. Compared with the existing technical solution that the exhaust structure relies on the exhaust hole 11 and needs to be blocked with a blocking member after exhaust, the exhaust valve 2 of the utility model has the function of autonomous exhaust and autonomous recovery, thereby effectively improving the cooling efficiency of the liquid cooling plate 100.

[0036] Furthermore, the cooling channel 1 includes: a diverter channel 12 and a converging channel 13, a plurality of branch channels 14 are provided between the diverter channel 12 and the converging channel 13, the exhaust valve 2 is provided at the connection between the diverter channel 12 and the plurality of branch channels 14; and / or, the exhaust valve 2 is provided at the connection between the converging channel 13 and the plurality of branch channels 14; and / or, the exhaust valve 2 is provided at the corner of the plurality of branch channels 14.

[0037] like Figure 2 As shown, when the low-temperature coolant enters the cooling channel 1, it can be diverted to multiple branch channels 14 through the diverter channel 12 to achieve a heat exchange effect on different parts of the battery, and finally flows out of the cooling channel 1 through the converging channel 13, taking away the heat generated by the battery, thereby cooling the battery.

[0038] Since gas stagnation is prone to occur at the connection between the diverter channel 12 and the multiple branch channels 14, the connection between the converging channel 13 and the multiple branch channels 14, or the corners of the multiple branch channels 14, the exhaust valve 2 is set at the connection between the diverter channel 12 and the multiple branch channels 14, the connection between the converging channel 13 and the multiple branch channels 14, and the corners of the multiple branch channels 14. This can avoid the occurrence of vacuum areas in the cooling channel 1 that lead to local high-temperature areas, thereby improving the cooling efficiency.

[0039] Furthermore, there are multiple diverter channels 12 and multiple converging channels 13, which are alternately arranged in sequence along the flow direction. The cooling channel 1 is provided with a liquid outlet 16 and a liquid inlet 15. The diverter channel 12 closest to the liquid inlet 15 is connected to the liquid inlet 15, and the converging channel 13 closest to the liquid outlet 16 is connected to the liquid outlet 16.

[0040] That is to say, the cooling channel 1 can form a channel structure of “dividing channel 12 - multiple branch channels 14 - converging channel 13 - multiple branch channels 14 - diverting channel 12 - multiple branch channels 14 - converging channel 13 . . . ”.

[0041] The branch flow channel 12 closest to the liquid inlet 15 is connected to the liquid inlet 15 , and the converging flow channel 13 closest to the liquid outlet 16 is connected to the liquid outlet 16 , thereby achieving large-area heat exchange of the coolant in the cooling flow channel 1 .

[0042] Please refer to Figure 2 In one embodiment of the utility model shown, the cooling channel 1 has two branch channels 12 and two converging channels 13, so as to form a channel structure of "dividing channel 12-multiple branch channels 14-converging channel 13-multiple branch channels 14-dividing channel 12-multiple branch channels 14-converging channel 13". Specifically, starting from the water inlet pipe 5, the coolant first passes through the diverting channel 12, and then is divided into four branch channels 14. The four branch channels 14 merge at the converging channel 13 at the tail of the liquid cooling plate 100. The merged channel is divided into four branch channels 14 by the diverting channel 12. Finally, the four branch channels 14 merge at the converging channel 13 and are connected to the water outlet pipe 6.

[0043] The above-mentioned cooling channel 1 is only one embodiment of the present invention. The exhaust valve 2 of the present invention can be applied to cooling channels 1 of different structures / types to prevent gas accumulation in the cooling channel 1.

[0044] Furthermore, the exhaust valve 2 includes: a valve body 21 and a semipermeable membrane 22 arranged in the valve body 21, the valve body 21 is provided with an air inlet 23 and an air outlet 24, the air inlet 23 is connected to the exhaust hole 11, and the semipermeable membrane 22 allows the gas accumulated in the liquid cold plate 100 to pass through and be discharged from the air outlet 24.

[0045] like Figure 5 and Figure 6 As shown, the semipermeable membrane 22 is integrated in the valve body 21. The semipermeable membrane 22 has the characteristics of being air-permeable and water-tight. When the coolant is added or the coolant flows, the gas will accumulate at the corner of the cooling channel 1. At this time, the accumulated gas enters the valve body 21 of the exhaust valve 2 through the air inlet 23 of the exhaust valve 2, then penetrates the semipermeable membrane 22, and is finally discharged into the air through the air outlet 24 of the exhaust valve 2, thereby finally playing the role of exhaust.

[0046] Furthermore, the exhaust valve 2 further comprises: a pressing plate 25 , which is arranged in the valve body 21 , and is provided with a through hole 29 opposite to the air outlet 24 , and the pressing plate 25 presses the semipermeable membrane 22 to one end of the valve body 21 close to the air outlet 24 .

[0047] like Figure 5 and Figure 6 As shown, the pressing plate 25 and the semipermeable membrane 22 are both installed in the valve body 21, and the pressing plate 25 is used to press the semipermeable membrane 22 at one end of the valve body 21 near the air outlet 24, so as to flatten and fix the semipermeable membrane 22. When the gas is accumulated at the corner of the cooling channel 1, the accumulated gas enters the valve body 21 of the exhaust valve 2 through the air inlet 23 of the exhaust valve 2, and then penetrates the semipermeable membrane 22 through the through hole 29 of the pressing plate 25, and finally is discharged into the air through the air outlet 24 of the exhaust valve 2, so as to finally play the role of exhaust.

[0048] Furthermore, a groove 27 is provided on the inner side wall of the valve body 21 , and the pressing plate 25 and the semipermeable membrane 22 are pressed into the groove 27 .

[0049] like Figure 5 As shown, a groove 27 is provided on the inner side wall of the valve body 21 so that the pressure plate 25 and the outer periphery of the semipermeable membrane 22 are fixed in the groove 27 .

[0050] In one embodiment of the present utility model, the valve body 21 is cylindrical, a plurality of air outlet holes 24 are opened on the top of the valve body 21 , and an air inlet hole 23 is left at the bottom of the valve body 21 .

[0051] Further, a mounting portion 28 is provided at one end of the valve body 21 near the air inlet hole 23, the mounting portion 28 is provided with the air inlet hole 23, and the mounting portion 28 is mounted and matched with the exhaust hole 11. In this way, the exhaust valve 2 can be fixed at the exhaust hole 11 by mounting the mounting portion 28 and matching with the exhaust hole 11 of the cooling channel 1. For example, the mounting portion 28 can be a protrusion, which is inserted into the exhaust hole 11 and sealed with the exhaust hole 11.

[0052] Therefore, the exhaust valve 2 of the utility model utilizes the air-permeable and water-impermeable properties of the semipermeable membrane 22 to release the gas accumulated in the liquid cooling plate 100 and achieve the function of exhaust. In addition, the exhaust valve 2 does not require manual or electric control of the blocking structure, and can achieve the function of self-exhaustion and automatic recovery by utilizing the air-permeable and water-impermeable properties.

[0053] Furthermore, the liquid cooling plate 100 includes: a first plate body 3 and a second plate body 4 arranged opposite to each other, the first plate body 3 is arranged above the second plate body 4, a cooling channel 1 is formed between the first plate body 3 and the second plate body 4, and an exhaust hole 11 is arranged above the first plate body 3.

[0054] like Figure 3 As shown, in the Z-axis direction, the first plate body 3 is relatively arranged above the second plate body 4, and a cooling channel 1 is formed between the first plate body 3 and the second plate body 4 so that the coolant can take away the heat at the first plate body 3. In addition, a plurality of exhaust holes 11 are arranged above the first plate body 3, and corresponding exhaust valves 2 are arranged at the plurality of exhaust holes 11 for autonomously releasing gas.

[0055] In the embodiment of the utility model, the first plate body 3 and the second plate body 4 can be connected by brazing. Specifically, the first plate body 3 and the second plate body 4 are sprayed with brazing material, and the two are fixedly connected after being passed through a high temperature furnace. Of course, the connection between the first plate body 3 and the second plate body 4 includes but is not limited to the above-mentioned brazing connection.

[0056] Furthermore, a flow channel cavity is provided on the first plate body 3 away from the second plate body 4, and the second plate body 4 is covered on the bottom of the first plate body 3 to form a cooling flow channel 1. In this way, the first plate body 3 can be formed into a flow channel cavity by stamping, so that a cooling flow channel 1 is formed between the first plate body 3 and the second plate body 4.

[0057] The second plate body 4 may be a temperature balancing plate, and a liquid inlet 15 and a liquid outlet 16 are provided on the temperature balancing plate, and the water inlet pipe 5 and the water outlet pipe 6 are fixedly connected to the temperature balancing plate through the liquid inlet 15 and the liquid outlet 16 respectively.

[0058] According to the second aspect of the present invention, the battery pack includes a plurality of battery cells and a liquid cooling plate 100 , and the surfaces of the plurality of battery cells are in contact with the liquid cooling plate 100 to dissipate heat and cool the plurality of battery cells.

[0059] Therefore, by setting an exhaust valve 2 at the exhaust hole 11 of the cooling channel 1, the gas accumulated in the liquid cooling plate 100 can be released by utilizing the air-permeable and water-tight characteristics of the semi-permeable membrane 22, thereby achieving the function of exhaust. In addition, the exhaust valve 2 does not require manual or electric control of the sealing structure, and realizes the function of autonomous exhaust and automatic recovery. In addition, by setting the exhaust valve 2 at the connection between the diversion channel 12 and the multiple branch channels 14, the connection between the converging channel 13 and the multiple branch channels 14, and the corners of the multiple branch channels 14, it is possible to avoid the vacuum area in the cooling channel 1 that causes a local high temperature area, thereby improving the cooling efficiency of the liquid cooling plate.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid cooling plate, characterized in that: A cooling channel is formed in the liquid cooling plate. The cooling channel is provided with an exhaust hole. An exhaust valve is provided at the exhaust hole to autonomously release the gas in the liquid cooling plate.

2. The liquid cooling plate according to claim 1, characterized in that: The cooling flow channel includes: a diverter flow channel and a converging flow channel, a plurality of branch flow channels are arranged between the diverter flow channel and the converging flow channel, the exhaust valve is arranged at the connection between the diverter flow channel and the plurality of branch flow channels; and / or, the exhaust valve is arranged at the connection between the converging flow channel and the plurality of branch flow channels; and / or, the exhaust valve is arranged at the corner of the plurality of branch flow channels.

3. The liquid cooling plate according to claim 2, characterized in that: There are multiple diverter channels and multiple converging channels, which are alternately arranged in sequence along the flow direction. The cooling channel is provided with a liquid inlet and a liquid outlet. The diverter channel closest to the liquid inlet is connected to the liquid inlet, and the converging channel closest to the liquid outlet is connected to the liquid outlet.

4. The liquid cooling plate according to claim 1, characterized in that: The exhaust valve comprises: a valve body and a semipermeable membrane arranged in the valve body, the valve body is provided with an air inlet and an air outlet, the air inlet is connected to the exhaust hole, and the semipermeable membrane allows the gas in the liquid cooling plate to pass through and be discharged from the air outlet.

5. The liquid cooling plate according to claim 4, characterized in that: The exhaust valve further comprises: a pressing plate, which is arranged in the valve body and is provided with a through hole opposite to the air outlet, and the pressing plate presses the semipermeable membrane at one end of the valve body close to the air outlet.

6. The liquid cooling plate according to claim 5, characterized in that: The inner side wall of the valve body is provided with a groove, and the pressing plate and the semipermeable membrane are pressed in the groove.

7. The liquid cooling plate according to claim 4, characterized in that: A mounting portion is provided at one end of the valve body close to the air inlet hole, the air inlet hole is provided on the mounting portion, and the mounting portion is mounted and matched with the air outlet hole.

8. The liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate includes: a first plate body and a second plate body arranged opposite to each other, the second plate body is arranged at the bottom of the first plate body, the cooling channel is formed between the first plate body and the second plate body, and the exhaust hole is arranged above the first plate body.

9. The liquid cooling plate according to claim 8, characterized in that: The first plate body is provided with a flow channel cavity which is away from the second plate body, and the second plate body is arranged at the bottom of the first plate body to form the cooling flow channel.

10. A battery pack, characterized in that: The invention comprises a plurality of battery cells and the liquid cooling plate according to any one of claims 1 to 9, wherein surfaces of the plurality of battery cells are in contact with the liquid cooling plate.

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