Liquid cooling plate containing double snakelike flow channels

Abstract

The utility model discloses a liquid cooling plate containing double snakelike flow channels, which enables an area to be subjected to heat dissipation to maintain uniform temperature characteristics through reasonable liquid cooling flow channels, enables pressure drop to meet requirements, and improves heat dissipation efficiency. The device comprises an upper cover plate; the first coiled pipe group comprises a first inlet section, a first coiled pipe continuous section, a first steering section and a first linear section, and an outlet of the first inlet section is connected with the starting end of the first coiled pipe continuous section; the first coiled pipe continuous section extends to the tail end along the length area of the upper cover plate and then is connected with the starting end of the first linear section after being turned by the first turning section; the second coiled pipe group comprises a second inlet section, a second straight line section, a second turning section and a second coiled pipe continuous section, and an outlet of the second inlet section is connected with the starting end of the second straight line section through the turning section; the second linear section extends to the tail end in the length direction of the upper cover plate, is turned by the second turning section and is connected with the starting end of the second coiled pipe continuous section; and a lower base plate assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of radiator structures, and specifically relates to a liquid cooling plate with double serpentine channels. Background Technique

[0002] Lithium-ion batteries are widely used in the field of new energy vehicles due to their excellent performance of high energy density, high power, and low self-discharge rate. During the charging and discharging process of lithium batteries, a large amount of heat transfer will occur. If appropriate thermal management means are not adopted, during this process, the surface temperature of the lithium battery will rise or fall sharply, triggering many abnormal chemical changes and causing the battery performance to fail.

[0003] Energy storage liquid cooling plates with a similar tray function are a common solution for lithium battery thermal management. Although liquid cooling is generally considered an efficient heat dissipation means, usually several groups of battery packs are placed on a pallet. During the charging and discharging process of lithium batteries, due to the liquid heating up during flow, the temperature in different regions of the flow channel will be different, which will bring the problem of temperature uniformity. How to develop a liquid cooling plate with high heat transfer efficiency, high stability, and good temperature uniformity has become a technical problem that has been continuously studied in recent years.

[0004] In addition, the key factor affecting the performance of the liquid cooling plate is also the pressure drop. Considering factors such as the power, flow rate, head, efficiency, and rotational speed of the water pump at the water inlet, the pressure drop of the coolant flowing through the liquid cooling channel will restrict the heat dissipation ability of the liquid cooling plate to a certain extent. If the flow resistance is too high due to the structure of the cold plate itself, during the actual operation, key parameters such as the flow rate and flow velocity inside the flow channel cannot reach the expected values, resulting in a reduction in the heat dissipation ability. Therefore, designing a suitable liquid cooling channel so that the internal pressure drop can meet the requirements of the water pump is one of the core requirements for improving the heat dissipation efficiency of the liquid cooling plate. Summary of the Invention

[0005] In view of the above problems, the utility model provides a liquid cooling plate with double serpentine channels, which enables the area to be cooled to maintain a uniform temperature characteristic through a reasonable liquid cooling channel, and enables the pressure drop to meet the requirements, thereby improving the heat dissipation efficiency.

[0006] A liquid cooling plate with double serpentine channels is characterized in that it includes:

[0007] An upper cover plate;

[0008] A first serpentine tube group, which includes a first inlet section, a first continuous serpentine tube section, a first turning section, and a first straight section. The outlet of the first inlet section is connected to the starting end of the first continuous serpentine tube section. The first continuous serpentine tube section extends along the length region of the upper cover plate until the end, and then turns through the first turning section and is connected to the starting end of the first straight section;

[0009] The second serpentine tube group, which includes a second inlet section, a second straight section, a second turning section, and a second continuous serpentine tube section. The outlet of the second inlet section is connected to the starting end of the second straight section through the turning section. The second straight section extends along the length direction of the upper cover plate to the end, and then turns through the second turning section and is connected to the starting end of the second continuous serpentine tube section;

[0010] and a lower bottom plate assembly;

[0011] The lower bottom plate assembly is provided with an embedded profiling groove corresponding to the arrangement areas of the first serpentine tube group and the second serpentine tube group. The first serpentine tube group and the second serpentine tube group are installed in the corresponding concave profiling grooves. The upper cover plate is covered on the upper surface of the lower bottom plate assembly, and the lower surface of the upper cover plate is closely arranged against the upper surfaces of the first serpentine tube group and the second serpentine tube group;

[0012] The starting ends of the first inlet section of the first serpentine tube group and the second inlet section of the second serpentine tube group are arranged adjacent to each other and are connected through a first flow channel adapter block;

[0013] The ends of the first straight section of the first serpentine tube group and the ends of the second continuous serpentine tube section of the second serpentine tube group are arranged adjacent to each other and are connected through a second flow channel adapter block;

[0014] The upper cover plate is provided with a liquid inlet and a liquid outlet at the positions corresponding to the first flow channel adapter block and the second flow channel adapter block. The inlet pipe is connected to the cavity of the first flow channel adapter block, and the outlet pipe is connected to the cavity of the second flow channel adapter block;

[0015] The first serpentine tube group is arranged on the periphery of the second serpentine tube group. The upper cover plate is divided into an upper half area and a lower half area in the width direction. The first continuous serpentine tube section covers the range of the upper cover plate corresponding to the upper half area. The second straight section is located in the lower end area of the upper half area and is arranged along the length direction of the upper cover plate. The first straight section is located in the lower end area of the lower half area and is arranged along the length direction of the upper cover plate. The second continuous serpentine tube section covers the range of the upper cover plate corresponding to the lower half area and is located within the width range area corresponding to the first straight section and the second straight section.

[0016] Its further feature is that:

[0017] The first flow channel adapter block and the second flow channel adapter block are arranged at the upper and lower positions at both ends in the width direction on the same side, which makes the width coverage areas of the first continuous serpentine tube section and the second continuous serpentine tube section relatively wide, ensuring a reliable liquid cooling effect;

[0018] The lower bottom plate assembly includes an aluminum foam filling layer and a bottom plate. The aluminum foam filling layer is laid in the inner cavity of the bottom plate, and the embedded profile groove is arranged in the aluminum foam filling layer. The aluminum foam filling layer plays a buffering role in the liquid flow in the tube group, and can also conduct heat exchange with the heat source surface and the tube wall, having a certain buffering and temperature equalizing effect;

[0019] The first serpentine tube group and the second serpentine tube group are made of round aluminum tubes and obtained by the process of flattening and bending the aluminum tubes;

[0020] The first serpentine tube group and the second serpentine tube group are connected to the upper cover plate and the aluminum foam filling layer by means of glue.

[0021] After adopting the above technical solution, the winding ends of the first serpentine tube continuous section and the second serpentine tube continuous section of the two serpentine tube groups adopted are respectively located in the upper plate area and the lower half area of the liquid cooling plate mechanism. The winding bends provide a large heat dissipation contact area, so that the heat dissipation efficiency of the whole plate is improved uniformly. For the specific temperature of the coolant of the whole plate, see Figure 3 ; and the two serpentine tube groups are connected in parallel through a flow channel adapter block, which plays a role in splitting the high-speed fluid flowing in from the inlet pipeline. Coupled with the large cross-sectional area of the flow channel, it is beneficial to reduce the flow resistance and pressure drop of the whole plate; through a reasonable liquid cooling flow channel, the area to be cooled can maintain a temperature equalizing characteristic, and the pressure drop meets the requirements, improving the heat dissipation efficiency. Brief Description of the Drawings

[0022] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0023] Figure 2 is an exploded schematic three-dimensional diagram of the present invention;

[0024] Figure 3 is a schematic diagram of the coolant temperature distribution corresponding to the liquid cooling tubes of the present invention;

[0025] The names corresponding to the serial numbers in the figure are as follows:

[0026] Upper cover plate 10, liquid inlet 11, liquid outlet 12, upper half area 101, lower half area 102, first serpentine tube group 20, first inlet section 21, first serpentine tube continuous section 22, first turning section 23, first straight section 24, second serpentine tube group 30, second inlet section 31, second straight section 32, second turning section 33, second serpentine tube continuous section 34, turning section 35, lower bottom plate assembly 40, aluminum foam filling layer 50, embedded profile groove 51, bottom plate 60, inner cavity 601, first flow channel adapter block 70, second flow channel adapter block 80, inlet pipe 90, outlet pipe 100. Detailed Embodiment

[0027] A liquid cooling plate with double serpentine flow channels, see Figures 1-2 , which includes an upper cover plate 10, a first serpentine tube group 20, a second serpentine tube group 30, and a lower base plate assembly 40;

[0028] The first serpentine tube group 20 includes a first inlet section 21, a first serpentine tube continuous section 22, a first turning section 23, and a first straight section 24. The outlet of the first inlet section 21 is connected to the starting end of the first serpentine tube continuous section 22. The first serpentine tube continuous section 22 extends along the length of the upper cover plate 10 to the end, then turns through the first turning section 23 and connects to the starting end of the first straight section 24.

[0029] The second serpentine tube group 30 includes a second inlet section 31, a second straight section 32, a second turning section 33, and a second serpentine tube continuous section 34. The outlet of the second inlet section 31 is connected to the starting end of the second straight section 32 through the turning section 35. The second straight section 32 extends to the end along the length direction of the upper cover plate 10 and then turns through the second turning section 33 to connect to the starting end of the second serpentine tube continuous section 34.

[0030] The lower bottom plate assembly 40 includes a foam aluminum filling layer 50 and a bottom plate 60. The foam aluminum filling layer 50 is laid in the inner cavity 601 of the bottom plate 60, and an embedded contour groove 51 is provided in the foam aluminum filling layer 50. The foam aluminum filling layer 50 has a buffering effect on the flow of liquid in the tube group. The foam aluminum filling layer 50 can also exchange heat with the heat source surface (upper cover plate 10 or bottom plate 60) and the tube wall, and has a certain buffering and temperature-averaging effect.

[0031] The foam aluminum filling layer 50 is provided with an embedded profiling groove 51 corresponding to the arrangement area of ​​the first serpentine tube group 20 and the second serpentine tube group 30. The first serpentine tube group 20 and the second serpentine tube group 30 are embedded in the corresponding concave profiling groove 51. The upper cover plate 10 is covered on the upper surface of the lower base plate assembly formed by the foam aluminum filling layer 50 and the base plate 60, and the lower surface of the upper cover plate 10 is arranged in close contact with the upper surface of the first serpentine tube group 20 and the second serpentine tube group 30.

[0032] The starting end of the first inlet section 21 of the first serpentine tube group 20 and the starting end of the second inlet section 31 of the second serpentine tube group 30 are arranged adjacent to each other and are connected through the first flow channel adapter block 70;

[0033] The end of the first straight section 24 of the first serpentine tube group 20 and the end of the second serpentine tube continuous section 34 of the second serpentine tube group 30 are arranged adjacent to each other and are connected through the second flow channel adapter block 80;

[0034] At the positions of the upper cover plate 10 corresponding to the first flow channel adapter block 70 and the second flow channel adapter block 80, a liquid inlet 11 and a liquid outlet 12 are provided. The liquid inlet pipe 90 is connected to the cavity of the first flow channel adapter block 70, and the liquid outlet pipe 100 is connected to the cavity of the second flow channel adapter block 80;

[0035] The first serpentine tube group 20 is arranged on the periphery of the second serpentine tube group 30. The upper cover plate 10 is divided into an upper half area 101 and a lower half area 102 in the width direction. The first serpentine tube continuous section 22 covers the range of the upper cover plate 10 corresponding to the upper half area 101. The second straight section 32 is located at the lower end area of the upper half area 102 and is arranged along the length direction of the upper cover plate 10. The first straight section 24 is located at the lower end area of the lower half area 101 and is arranged along the length direction of the upper cover plate 10. The second serpentine tube continuous section 34 covers the range of the upper cover plate 10 corresponding to the lower half area 102 and is located within the width range area corresponding to the first straight section 24 and the second straight section 32.

[0036] In specific implementation, the first flow channel adapter block 70 and the second flow channel adapter block 80 are the same flow channel adapter blocks, which are used for parallel cooling pipelines;

[0037] The first flow channel adapter block 70 and the second flow channel adapter block 80 are arranged at the upper and lower positions at both ends in the width direction on the same side, which makes the width coverage areas of the first serpentine tube continuous section 22 and the second serpentine tube continuous section 34 relatively wide, ensuring a reliable liquid cooling effect.

[0038] In specific implementation, the first serpentine tube group 20 and the second serpentine tube group 30 are made of round aluminum tubes and are obtained by the manufacturing process of flattening and bending the aluminum tubes;

[0039] The first serpentine tube group 20 and the second serpentine tube group 30 are connected to the upper cover plate 10 and the aluminum foam filling layer 50 by means of glue.

[0040] The positions of the water outlet, the liquid inlet 11 and the liquid outlet 12 in the text can be interchanged without affecting the liquid cooling effect.

[0041] The beneficial effects of the present technology are:

[0042] 1. The serpentine tube groups of the present technology are made of round aluminum tubes, manufactured by the mature process of flattening and bending the aluminum tubes, and connected to the upper cover plate and the aluminum foam by means of glue. Only high-frequency welding or flame welding is required at the connection with the adapter block, and the process is relatively simple;

[0043] 2. The bends of the two serpentine flat tubes of the present technology are respectively located in the upper half area and the lower half area of the liquid cooling plate structure. The winding bends provide a large heat dissipation contact area, so that the heat dissipation efficiency of the entire liquid cooling plate is uniformly improved;

[0044] 3. The water inlets and outlets of the two groups of serpentine tube sets of the present technology are in the same plane. As shown in Figure 3 , the red represents high temperature and the blue represents low temperature. The hot and cold fluids are distributed on both sides of its center line. Considering the average temperature, after being neutralized by heat conduction between the two, it has good temperature uniformity along the length direction (the arrow direction in the figure);

[0045] 4. The two groups of serpentine tube sets of the present technology are connected in parallel through a flow channel adapter block, which plays a role in shunting the high-speed fluid flowing in from the liquid inlet pipe. Coupled with the relatively large cross-sectional area of the flow channel, it is beneficial to reduce the flow resistance and pressure drop of the entire liquid cooling plate;

[0046] 5. All components of the present technology are made of corrosion-resistant materials, which can improve the overall working stability and service life of the liquid cooling plate.

[0047] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid cooling plate with a double serpentine flow channel, characterized in that, It includes: Upper cover plate; The first serpentine tube group, which includes a first inlet section, a first continuous serpentine tube section, a first turning section, and a first straight section. The outlet of the first inlet section is connected to the starting end of the first continuous serpentine tube section. The first continuous serpentine tube section extends along the length region of the upper cover plate until the end, and then is turned by the first turning section and connected to the starting end of the first straight section; The second serpentine tube group, which includes a second inlet section, a second straight section, a second turning section, and a second continuous serpentine tube section. The outlet of the second inlet section is connected to the starting end of the second straight section through a turning section. The second straight section extends along the length direction of the upper cover plate to the end, and then is turned by the second turning section and connected to the starting end of the second continuous serpentine tube section; And a lower bottom plate assembly; The lower bottom plate assembly is provided with an embedded profiling groove corresponding to the arrangement areas of the first serpentine tube group and the second serpentine tube group. The first serpentine tube group and the second serpentine tube group are embedded in the corresponding concave profiling grooves. The upper cover plate is covered on the upper surface of the lower bottom plate assembly, and the lower surface of the upper cover plate is closely arranged against the upper surfaces of the first serpentine tube group and the second serpentine tube group; The starting ends of the first inlet section of the first serpentine tube group and the second inlet section of the second serpentine tube group are arranged adjacent to each other and are connected through a first flow channel adapter block; The ends of the first straight section of the first serpentine tube group and the ends of the second continuous serpentine tube section of the second serpentine tube group are arranged adjacent to each other and are connected through a second flow channel adapter block; The upper cover plate is provided with a liquid inlet and a liquid outlet corresponding to the positions of the first flow channel adapter block and the second flow channel adapter block. The inlet pipe is connected to the cavity of the first flow channel adapter block, and the outlet pipe is connected to the cavity of the second flow channel adapter block; The first serpentine tube group is arranged on the periphery of the second serpentine tube group. The upper cover plate is divided into an upper half area and a lower half area in the width direction. The first continuous serpentine tube section covers the range of the upper cover plate corresponding to the upper half area. The second straight section is located in the lower end area of the upper half area and is arranged along the length direction of the upper cover plate. The first straight section is located in the lower end area of the lower half area and is arranged along the length direction of the upper cover plate. The second continuous serpentine tube section covers the range of the upper cover plate corresponding to the lower half area and is located within the width range area corresponding to the first straight section and the second straight section.

2. The liquid cooling plate with double serpentine flow channels according to claim 1, characterized in that: The first flow channel adapter block and the second flow channel adapter block are arranged at the upper and lower positions at both ends in the width direction on the same side.

3. The liquid cooling plate with double serpentine flow channels according to claim 1, characterized in that: The lower bottom plate assembly includes an aluminum foam filling layer and a bottom plate. The aluminum foam filling layer is laid in the inner cavity of the bottom plate, and the embedded profiling groove is arranged in the aluminum foam filling layer.

4. The liquid cooling plate with a double serpentine flow channel according to claim 1, wherein: The first serpentine tube group and the second serpentine tube group are made of round aluminum tubes and are obtained by the process of flattening and bending aluminum tubes.

5. The liquid cooling plate with a double serpentine flow channel according to claim 4, characterized in that: The first serpentine tube group and the second serpentine tube group are connected to the upper cover plate and the aluminum foam filling layer by means of glue.

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