New Liquid Cooling Plate

Abstract

The present invention provides a new type of liquid cooling plate, which relates to the field of battery technology and solves the technical problem of relatively poor heat exchange uniformity of liquid cooling plates in the prior art. The liquid cooling plate includes an internal flow channel, wherein a liquid inlet is provided at the bottom of the internal flow channel, and a liquid discharge port is provided on the top of the internal flow channel. The coolant flowing in from the liquid inlet can be discharged from the liquid discharge port after passing through the grid-shaped internal flow channel. The present invention is used for cooling batteries to ensure the uniformity of the temperature of the power battery as much as possible.

Description

Technical Field

[0001] The invention relates to the technical field of batteries, and in particular to a novel liquid cooling plate. Background Art

[0002] The working performance of electric vehicle power batteries is seriously affected by temperature. In order to ensure the working performance of power batteries, the batteries must be kept at a suitable temperature. The ambient temperature of power batteries is currently between -30℃ and 55℃, while the ideal working temperature of batteries is between 15℃ and 30℃. Traditional air cooling and natural cooling cannot meet its use conditions and requirements, so liquid cooling technology must be applied.

[0003] Liquid cooling plate is the most common liquid cooling technology. In the design of liquid cooling plate, flow uniformity and heat exchange efficiency are two very important aspects, especially flow uniformity, which will affect heat exchange uniformity and further affect battery temperature uniformity, that is, temperature difference.

[0004] The present invention designs a novel liquid cooling plate with a series-parallel structure, which has the characteristics of good flow uniformity and high heat exchange efficiency, and can ensure the uniformity of the power battery temperature as much as possible, and keep the battery temperature within a reasonable range. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of liquid cooling plate, which solves the technical problem of relatively poor heat exchange uniformity of the liquid cooling plate in the prior art. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A new type of liquid cooling plate provided by the present invention comprises an internal flow channel, wherein a liquid inlet is arranged at the bottom of the internal flow channel, and a liquid discharge port is arranged at the top of the internal flow channel, and the cooling liquid flowing in from the liquid inlet can be discharged from the liquid discharge port after passing through the grid-shaped internal flow channel.

[0008] Furthermore, the internal flow channel forms a rectangular grid shape with horizontal and vertical intersections.

[0009] Furthermore, a liquid tank structure for increasing the heat exchange area is provided at some or all of the grid intersections of the internal flow channel.

[0010] Furthermore, along the height direction of the liquid cooling plate, it is divided into a lower area, a middle area and an upper area from bottom to top, the volume of each liquid tank structure in the middle area is larger than the volume of each liquid tank structure in the upper area, and the volume of each liquid tank structure in the middle area is not less than the volume of each liquid tank structure in the lower area.

[0011] Furthermore, the volumes of the liquid tank structures in the middle region are the same; and the volumes of the liquid tank structures in the upper region are the same.

[0012] Furthermore, the liquid inlet is arranged on one side of the bottom of the internal flow channel, and at least one row of the liquid trough structures is distributed in the lower region along the height direction of the new liquid cooling plate, and there is at least one row of the liquid trough structures whose volumes tend to increase along the length direction of the new liquid cooling plate, and the volume of the liquid trough structure in the lower region close to the liquid inlet is the smallest.

[0013] Furthermore, the novel liquid cooling plate includes a front cover plate and a rear cover plate, the front cover plate and the rear cover plate are arranged opposite to each other and fit together, and a grid groove is arranged on the rear cover plate, and the grid groove is used to form the internal flow channel.

[0014] Furthermore, circular grooves are formed at the intersections of the grid grooves.

[0015] Furthermore, the front cover plate is provided with spoiler protrusion structures, and the spoiler protrusion structures are respectively located in sections corresponding to the grid grooves.

[0016] Furthermore, the spoiler protrusion structures are in a grid-like structure that is horizontally and vertically crossed, and in each row and column of the spoiler protrusion structures, the spoiler protrusion structures are distributed at intervals along their extension direction.

[0017] Furthermore, the grid grooves and circular grooves on the rear cover plate and the spoiler structure on the front cover plate are all formed by stamping.

[0018] The present invention provides a new type of liquid cooling plate. When the coolant enters from the liquid inlet, since the liquid inlet is located at the bottom, the coolant is pushed upward along the grid-like internal flow channel (the internal flow channel is preferably a rectangular grid structure that intersects horizontally and vertically), and is discharged from the drain port on the top, which is conducive to achieving uniform flow of the coolant, uniform heat exchange, and reducing the temperature difference between batteries.

[0019] The preferred technical solution of the present invention can at least produce the following technical effects:

[0020] A liquid tank structure is provided at some or all of the grid intersections of the internal flow channel, and the liquid tank structure is used to increase the heat exchange area;

[0021] The volume of each liquid tank structure in the middle area is greater than that of each liquid tank structure in the upper area, and the volume of each liquid tank structure in the middle area is not less than that of each liquid tank structure in the lower area. The volumes of the liquid tank structures in the middle area are the same; the volumes of the liquid tank structures in the upper area are the same, and the volumes of each row of liquid tank structures in the lower area tend to increase along the length direction of the new liquid cold plate to ensure the uniformity of the battery temperature as much as possible.

[0022] A spoiler convex structure is arranged on the front cover plate, which plays a role in enhancing spoiler and improving heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of a novel liquid cooling plate provided by an embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of a rear cover provided by an embodiment of the present invention;

[0026] Figure 3 is a schematic structural diagram of a front cover provided by an embodiment of the present invention;

[0027] Figure 4 It is a cross-sectional schematic diagram of a novel liquid cooling plate provided in an embodiment of the present invention.

[0028] In the figure, 1 is liquid inlet; 2 is liquid discharge port; 3 is liquid tank structure; 4 is front cover plate; 41 is spoiler protrusion structure; 5 is rear cover plate; 51 is grid groove; 52 is circular groove; 6 is water inlet pipe; 7 is water outlet pipe. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] See also Figure 1-Figure 4 The present invention provides a novel liquid cooling plate, including an internal flow channel, wherein a liquid inlet 1 is provided at the bottom of the internal flow channel, and a liquid discharge port 2 is provided at the top of the internal flow channel, and the coolant flowing in from the liquid inlet 1 can be discharged from the liquid discharge port 2 after passing through the grid-shaped internal flow channel. When the coolant enters from the liquid inlet 1, since the liquid inlet 1 is located at the bottom, the coolant is pushed upward along the grid-shaped internal flow channel and discharged from the liquid discharge port 2 at the top, which is conducive to achieving uniform flow of the coolant, uniform heat exchange, and reducing the temperature difference between batteries.

[0031] As an optional implementation of the present invention, the internal flow channel forms a rectangular grid with horizontal and vertical intersections. Figure 4 , the horizontal flow channel and the vertical flow channel intersect each other, and since a liquid inlet 1 is provided at the bottom of the internal flow channel (see Figure 4 , the liquid inlet 1 is arranged on one side of the horizontal flow channel of the bottom row of the liquid cooling plate), and the drain port 2 is arranged on the top of the internal flow channel (see Figure 4 , the drain port 2 is set on one side of the horizontal flow channel in the top row of the liquid cooling plate). When the coolant enters from the inlet port 1, the coolant flows in the horizontal flow channel at the bottom, and then moves upward layer by layer along the vertical flow channel to achieve uniform flow of the coolant, which is beneficial to the uniformity of heat exchange and reduces the temperature difference between batteries. For internal flow channels, see Figure 4 The spacing between the horizontal flow channels is the same and the cross-sectional sizes of the horizontal flow channels are the same, the spacing between the vertical flow channels is also the same and the cross-sectional sizes of the vertical flow channels are the same.

[0032] As an optional implementation method of the present invention, a liquid tank structure 3 is provided at some or all grid intersections of the internal flow channel to increase the heat exchange area. Figure 4 , indicating that the liquid tank structure 3 is arranged at all the grid intersections of the internal flow channel, and the liquid tank structure 3 increases the heat exchange area, which is beneficial to reducing the temperature of the battery. The cross-sectional shape of the liquid tank structure 3 (parallel to the cross section of the liquid cooling plate) can be circular, but is not limited to circular, and can also be other shapes, such as rhombus, rectangle, etc.

[0033] As an optional implementation mode of an embodiment of the present invention, the liquid cooling plate is divided into a lower area, a middle area and an upper area from bottom to top along the height direction. The shapes of the liquid tank structures 3 on the liquid cooling plate can be the same, but the sizes may not be completely consistent, and can be as follows: the volume of each liquid tank structure 3 in the middle area is larger than the volume of each liquid tank structure 3 in the upper area, and the volume of each liquid tank structure 3 in the middle area is not less than the volume of each liquid tank structure 3 in the lower area. Because when the coolant enters the liquid cooling plate from the water inlet pipe 6, the coolant temperature is the lowest and the heat exchange effect is the best. In order to ensure the uniformity of the battery temperature, the heat exchange area in the lower region is reduced accordingly. Therefore, the volume of the liquid tank structure 3 in the lower region is the smallest (the diameter of the liquid tank structure 3 in the lower region is small and the heat exchange area is small); because the temperature in the middle of the battery pack in the PACK box is the highest, the required heat exchange amount is also the largest, so the volume of the liquid tank structure 3 in the middle region is the largest; similarly, the temperature of the upper part of the battery is lower than the temperature of the middle area of ​​the battery, and the temperature of the coolant rises at the same time, so the volume of the liquid tank structure 3 in the upper region is in the middle.

[0034] In addition, the division of the lower area, the middle area and the upper area of ​​the liquid cooling plate can be determined according to actual conditions, and the width values ​​of each area along the height direction of the liquid cooling plate can be consistent or inconsistent.

[0035] As an optional implementation method of the embodiment of the present invention, the volume of each liquid tank structure 3 in the middle area is the same; the volume of each liquid tank structure 3 in the upper area is the same. As for the size of each liquid tank structure 3 in the lower area, it can be as follows: the liquid inlet 1 is arranged on one side of the bottom of the internal flow channel, and at least one row of liquid tank structures 3 is distributed along the height direction of the new liquid cooling plate in the lower area, and there is at least one row of liquid tank structures 3 whose volume tends to increase along the length direction of the new liquid cooling plate (for the liquid tank structures 3 in the lower area, it can be that the volume of all rows of liquid tank structures 3 tends to increase along the length direction of the new liquid cooling plate, or it can be that the volume of some rows of liquid tank structures 3 tends to increase along the length direction of the new liquid cooling plate. If it is the latter case, along the height direction of the lower area, the volume of the liquid tank structures 3 is gradually distributed from the bottom to the top), and the volume of the liquid tank structure 3 on the side close to the liquid inlet 1 in the lower area is the smallest. See. Figure 4 , it is shown that there are two rows of liquid tank structures 3 distributed along the height direction of the new liquid cooling plate in the lower area, and the volume of the two rows of liquid tank structures 3 tends to increase along the length direction of the new liquid cooling plate. Because the coolant temperature at the liquid inlet 1 is the lowest and the heat exchange effect is the strongest, the coolant temperature gradually increases with the extension of the flow. In order to ensure the uniformity of the temperature in the lower area of ​​the battery as much as possible, the liquid tank structure 3 in the lower area is arranged in a way that the liquid tank volume gradually increases. When the coolant enters from the liquid inlet 1, the coolant water is located in the horizontal flow channel at the bottom, and then it is pushed upward layer by layer along the vertical flow channel. Due to the flow mode of the coolant in the internal flow channel, the coolant temperature tends to be consistent in the middle area and the upper area of ​​the liquid cooling plate flow channel. Therefore, the volume of each liquid tank structure 3 in the middle area is consistent; the volume of each liquid tank structure 3 in the upper area is consistent.

[0036] In addition, in order to avoid the following situation in the two rows of liquid tank structures 3 in the lower area, that is, when the liquid tank structure 3 with the largest volume is not completely filled, the liquid tank structure 3 with the smallest volume is already full, and the water level rises and enters the liquid tank structure 3 in the upper row, the difference between the minimum and maximum volumes in the same row of liquid tank structures 3 in the lower area cannot be too large.

[0037] As an optional implementation of the present invention, the novel liquid cooling plate includes a front cover plate 4 and a rear cover plate 5, which are arranged opposite to each other and fit together, and a grid groove 51 is arranged on the rear cover plate 5, and the grid groove 51 is used to form an internal flow channel. Figure 1 The liquid cooling plate provided by the present invention is placed vertically, the front cover plate 4 and the rear cover plate 5 are arranged opposite to each other and fit together, and an internal flow channel is formed by the fitting surfaces between the front cover plate 4 and the rear cover plate 5 and the grid groove 51.

[0038] As an optional implementation of the embodiment of the present invention, a circular groove 52 is formed at the intersection of the grid grooves 51. The circular groove 52 is used to form the liquid tank structure 3, and the cross-sectional shape of the circular groove 52 (parallel to the cross section of the liquid cooling plate) can be circular, but is not limited to circular, and can also be other shapes.

[0039] As an optional implementation of the embodiment of the present invention, the front cover plate 4 is provided with spoiler convex structures 41, and the spoiler convex structures 41 are respectively located in the sections corresponding to the grid grooves 51. Figure 3 and Figure 4 Several rows of spoiler protrusion structures 41 are distributed along the height direction of the front cover plate 4, and several columns of spoiler protrusion structures 41 are distributed along the length direction of the front cover plate 4. Each row or column can form a horizontally and vertically crossed grid structure, and in each row and column, the spoiler protrusion structures 41 are distributed at intervals. The front cover plate 4 and the rear cover plate 5 are fitted together, and each spoiler protrusion structure 41 is arranged exactly in the middle of the corresponding horizontal flow channel and the vertical flow channel, which plays a role in enhancing the spoiler and improving the heat exchange effect.

[0040] As an optional implementation mode of the embodiment of the present invention, the grid groove 51 and the circular groove 52 on the rear cover plate 5 and the spoiler structure on the front cover plate 4 are all stamped, and the processing method is simple and easy to manufacture.

[0041] Embodiment 1:

[0042] A novel liquid cooling plate, comprising a front cover plate 4 and a rear cover plate 5, the front cover plate 4 and the rear cover plate 5 are arranged opposite to each other and fit together, a grid groove 51 is arranged on the rear cover plate 5, the grid groove 51 is a rectangular grid structure that crosses horizontally and vertically, the grid groove 51 is used to form an internal flow channel between the front cover plate 4 and the rear cover plate 5, a circular groove 52 is formed at the intersection of the grid groove 51, the circular groove 52 is used to form a liquid tank structure 3 that increases the heat exchange area, a spoiler convex structure 41 is arranged on the front cover plate 4, each spoiler convex structure 41 is arranged exactly in the middle of the corresponding horizontal flow channel and the vertical flow channel, so as to enhance the spoiler and improve the heat exchange effect;

[0043] The liquid cooling plate is divided into a lower area, a middle area and an upper area from bottom to top along the height direction. The volume of each liquid tank structure 3 in the middle area is greater than the volume of each liquid tank structure 3 in the upper area, and the volume of each liquid tank structure 3 in the middle area is not less than the volume of each liquid tank structure 3 in the lower area; the volumes of the liquid tank structures 3 in the middle area are the same; the volumes of the liquid tank structures 3 in the upper area are the same; the liquid inlet 1 is arranged on one side of the bottom of the internal flow channel, and at least one row of liquid tank structures 3 are distributed along the height direction of the new liquid cooling plate in the lower area, and the volume of each row of liquid tank structures 3 tends to increase along the length direction of the new liquid cooling plate, and the volume of the liquid tank structure 3 on the side close to the liquid inlet 1 in the lower area is the smallest.

[0044] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A new type of liquid cooling plate, characterized in that: Includes internal flow channels, where A liquid inlet (1) is provided at the bottom of the internal flow channel, and a liquid discharge port (2) is provided at the top of the internal flow channel, and the coolant flowing in from the liquid inlet (1) can be discharged from the liquid discharge port (2) after passing through the grid-shaped internal flow channel; A liquid tank structure (3) is provided at some or all of the grid intersections of the internal flow channel to increase the heat exchange area; The liquid cooling plate is divided into a lower region, a middle region and an upper region from bottom to top along the height direction of the liquid cooling plate. The liquid inlet (1) is arranged on one side of the bottom of the internal flow channel. At least one row of the liquid tank structures (3) is distributed along the height direction of the novel liquid cooling plate in the lower region. There is at least one row of the liquid tank structures (3) whose volumes tend to increase along the length direction of the novel liquid cooling plate. In addition, the volume of the liquid tank structures (3) on the side close to the liquid inlet (1) in the lower region is the smallest.

2. The novel liquid cooling plate according to claim 1, characterized in that: The internal flow channel forms a rectangular grid shape that is horizontally and vertically crossed.

3. The novel liquid cooling plate according to claim 1, characterized in that: The volume of each of the liquid tank structures (3) in the middle area is greater than the volume of each of the liquid tank structures (3) in the upper area, and the volume of each of the liquid tank structures (3) in the middle area is not less than the volume of each of the liquid tank structures (3) in the lower area.

4. The novel liquid cooling plate according to claim 3 is characterized in that: The volumes of the liquid tank structures (3) in the middle region are the same; and the volumes of the liquid tank structures (3) in the upper region are the same.

5. The novel liquid cooling plate according to any one of claims 1 to 4, characterized in that: The novel liquid cooling plate comprises a front cover plate (4) and a rear cover plate (5), wherein the front cover plate (4) and the rear cover plate (5) are arranged opposite to each other and fit together, and the rear cover plate (5) is provided with a grid groove (51), and the grid groove (51) is used to form the internal flow channel.

6. The novel liquid cooling plate according to claim 5, characterized in that: Circular grooves (52) are formed at the intersections of the grid grooves (51).

7. The novel liquid cooling plate according to claim 5, characterized in that: The front cover plate (4) is provided with spoiler protrusion structures (41), and the spoiler protrusion structures (41) are respectively located in sections corresponding to the grid grooves (51).

8. The novel liquid cooling plate according to claim 7, characterized in that: The spoiler protrusion structures (41) are in the form of a horizontally and vertically crossed grid structure, and in each row and column of the spoiler protrusion structures (41), the spoiler protrusion structures (41) are distributed at intervals along their extension direction.

9. The novel liquid cooling plate according to claim 7, characterized in that: The grid groove (51) and the circular groove (52) on the rear cover plate (5) and the spoiler structure on the front cover plate (4) are all formed by stamping.

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