Liquid cooling heat dissipation structure, liquid cooling heat dissipation unit and liquid cooling heat dissipation system

Abstract

The utility model discloses a liquid cooling heat dissipation structure which comprises a water inlet branch pipe, a water return branch pipe and a plurality of liquid cooling plates arranged at intervals. The water inlet branch pipe and the water return branch pipe are both connected with the plurality of liquid cooling plates, and a cooling medium flows through the plurality of liquid cooling plates through the water inlet branch pipe and then flows out through the water return branch pipe; the water inlet branch pipe comprises a water inlet port and a plurality of liquid cooling plate water inlet connectors, the plurality of liquid cooling plate water inlet connectors are connected with the plurality of liquid cooling plates in a one-to-one correspondence manner, and the water inlet port is located between any two liquid cooling plate water inlet connectors; the pipe diameter of the liquid cooling plate water inlet connector close to the water inlet port is larger than the pipe diameter of the liquid cooling plate water inlet connector far away from the water inlet port. According to the utility model, the problem of non-uniform flow distribution of cooling liquid is solved, and the control on the flow of the liquid cooling plate is improved. The utility model also discloses a liquid cooling heat dissipation unit and a liquid cooling heat dissipation system.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a liquid cooling heat dissipation structure, a liquid cooling heat dissipation unit, and a liquid cooling heat dissipation system. Background Technology

[0002] Energy storage systems are a crucial foundation for microgrids, isolated grids, distributed generation systems, and fast charging technologies for new energy vehicles. The application of energy storage systems in electronic systems enables demand-side management, peak shaving and valley filling, load smoothing, and rapid adjustment of grid frequency, thereby improving grid stability and reliability and reducing the impact of rapidly changing solar and wind power generation systems on the grid.

[0003] Currently, most energy storage systems use forced air cooling, while some systems use liquid cooling to cool the battery pack. Utility Model Content

[0004] Existing liquid cooling systems suffer from uneven coolant flow distribution, reducing battery cell lifespan. To overcome these shortcomings, this invention aims to provide a liquid cooling structure, unit, and system that solves the problem of uneven coolant flow distribution and improves control over the flow rate of the liquid cooling plate.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A liquid cooling structure includes an inlet branch pipe, a return branch pipe, and multiple liquid cooling plates arranged at intervals. Both the inlet branch pipe and the return branch pipe are connected to the multiple liquid cooling plates. Cooling medium flows through the inlet branch pipe, passes through the multiple liquid cooling plates, and then exits through the return branch pipe. The inlet branch pipe includes an inlet port and multiple liquid cooling plate inlet connections. Each liquid cooling plate inlet connection is connected to one of the multiple liquid cooling plates. The inlet port is located between any two liquid cooling plate inlets, and the diameter of the liquid cooling plate inlet connection closest to the inlet port is larger than the diameter of the liquid cooling plate inlet connection furthest from the inlet port.

[0007] In one embodiment, the return water branch pipe includes a return water port and multiple liquid-cooled plate return water connection ports, and the multiple liquid-cooled plate return water connection ports are connected to the multiple liquid-cooled plates one by one; the pipe diameter of the liquid-cooled plate inlet connection port connected to the same liquid-cooled plate is the same as the pipe diameter of the liquid-cooled plate return water connection port.

[0008] In one embodiment, the water inlet port is positioned lower than the water return port.

[0009] In one embodiment, the water inlet port is disposed between the two liquid cooling plate water inlet connection ports located at the bottom; the liquid cooling heat dissipation structure includes n liquid cooling plates, and the water inlet branch pipe includes n liquid cooling plate water inlet connection ports that are connected one-to-one with the n liquid cooling plates, 3≦n≦5;

[0010] The diameter of the water inlet of the liquid cooling plate is a n express:

[0011] When n=3, a1=a, a2=a, a3=a;

[0012] When n=4, a1=a, a2=a, a3=a, a4=a;

[0013] When n=5, a1=a, a2=a, a3=a, a4=a, a5=a;

[0014] Where 'a' is a set value; the plurality of liquid cooling plate water inlet connections are arranged sequentially from one end of the water inlet branch pipe to the other end, and their pipe diameters are numbered sequentially as a1, a2, a3...a n a1 is the diameter of the liquid cooling plate inlet connection port located near the water inlet port and at one end of the water inlet branch pipe.

[0015] In one embodiment, the liquid cooling plate has a U-shaped flow channel inside.

[0016] This utility model also provides a liquid cooling heat dissipation unit, including multiple liquid cooling heat dissipation structures as described above, wherein the multiple liquid cooling heat dissipation structures are arranged sequentially along the flow direction of the cooling medium.

[0017] In one embodiment, the liquid cooling heat dissipation unit further includes a unit water inlet pipe and a unit water return pipe. The unit water inlet pipe includes a unit water inlet and a plurality of unit water inlet connection ports, and the plurality of unit water inlet connection ports are connected one-to-one with the water inlet ports of the plurality of liquid cooling heat dissipation structures. The unit water return pipe includes a unit water return port and a plurality of unit water return connection ports, and the plurality of unit water return connection ports are connected one-to-one with the water return ports of the plurality of liquid cooling heat dissipation structures.

[0018] In one embodiment, along the unit water inlet pipe, the total number of unit water inlet connections is M, and the pipe diameters of two adjacent unit water inlet connections satisfy the following relationship:

[0019] b m =b m-1 +[0.15 / (M-1)]*b;

[0020] Where 4≦M≦10, 2≦m≦M, b1=0.85b, and b is a set value. m≦b; Multiple unit water inlet connections are arranged sequentially along the flow direction of the cooling medium, and their pipe diameters are numbered sequentially as b1, b2, b3...b m b1 is the pipe diameter of the first water inlet connection port of the unit closest to the unit inlet; M and m are both positive integers.

[0021] In one embodiment, an air vent valve is provided at the end of the unit water inlet pipe away from the unit water inlet and / or at the end of the unit water return pipe away from the unit water return outlet.

[0022] In one embodiment, a ball valve and a drain valve are provided at one end of the unit water inlet pipe near the unit water inlet and / or at one end of the unit water return pipe near the unit water return outlet.

[0023] This utility model also provides a liquid cooling heat dissipation system, including multiple liquid cooling heat dissipation units as described above.

[0024] In one embodiment, the liquid cooling system further includes a system inlet pipe and a system return pipe. The system inlet pipe includes a system inlet and multiple system inlet connection ports, and the multiple system inlet connection ports are connected one-to-one with the unit inlets of the multiple liquid cooling units. The system return pipe includes a system return port and multiple system return connection ports, and the multiple system return connection ports are connected one-to-one with the unit return ports of the multiple liquid cooling units.

[0025] In one embodiment, the total number of system inlet connections along the system inlet pipeline is I, and the pipe diameters of adjacent system inlet connections satisfy the following relationship:

[0026] c i =c i-1 +[0.35 / (I-1)]*c;

[0027] Where 4≦I≦8, 2≦i≦I, c1=0.65c, and c is a set value. i ≦c; Multiple system water inlet connections are arranged sequentially along the flow direction of the cooling medium, and their pipe diameters are numbered sequentially as c1, c2, c3...c i c1 is the pipe diameter of the first system inlet connection port closest to the system inlet; I and i are both positive integers.

[0028] The beneficial effects of this utility model are as follows:

[0029] (1) The water inlet port is located between any two liquid cooling plate water inlet connections, and the pipe diameter of the liquid cooling plate water inlet connection closer to the water inlet port is larger than the pipe diameter of the liquid cooling plate water inlet connection further away from the water inlet port. By adjusting the pipe diameter of each liquid cooling plate water inlet connection port, the flow rate of the coolant in the water inlet branch pipe can be distributed before flowing into each liquid cooling plate, ensuring the uniformity of the flow rate of each liquid cooling plate, facilitating the control of the flow rate of the liquid cooling plate, and solving the problem of uneven coolant flow distribution in the original liquid cooling heat dissipation system, which leads to a short service life of the battery cell.

[0030] (2) When the present invention is applied to an energy storage system, the liquid cooling heat dissipation structure can be used as a three-stage liquid cooling pipeline. Compared with the existing three-stage liquid cooling pipeline of the energy storage system, the liquid cooling heat dissipation structure of the present invention integrates the three-stage liquid cooling pipeline, reduces the number of quick-connect fittings in the pipeline, reduces the risk of pipeline leakage, reduces pipeline cost, and reduces the number of pipe openings with different diameter specifications in the pipeline. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the liquid cooling heat dissipation structure according to an embodiment of the present invention;

[0033] Figure 2 yes Figure 1 A magnified view of a portion at point A;

[0034] Figure 3 This is a schematic diagram of the structure of the liquid cooling heat dissipation unit according to an embodiment of this utility model;

[0035] Figure 4 yes Figure 3 A magnified view of the area at point B;

[0036] Figure 5 This is a schematic diagram of the liquid cooling heat dissipation system according to an embodiment of the present invention;

[0037] Figure 6 yes Figure 5 A magnified view of the area at point D;

[0038] Figure 7 yes Figure 5 A magnified view of the area at point F;

[0039] Figure 8This is a schematic diagram of the structure of the liquid cooling plate according to an embodiment of the present invention;

[0040] Figure 9 yes Figure 8 A schematic diagram of the internal flow channels of the liquid cooling plate.

[0041] In the diagram: 100, Liquid cooling structure; 200, Liquid cooling unit; 1, Inlet branch pipe; 11, Inlet port; 12, Liquid cooling plate inlet connection port; 2, Return branch pipe; 21, Return port; 22, Liquid cooling plate return connection port; 3, Liquid cooling plate; 4, Unit inlet pipe; 41, Unit inlet; 42, Unit inlet connection port; 5, Unit return pipe; 51, Unit return port; 52, Unit return connection port; 6, Air vent valve; 7, Ball valve; 8, Drain valve; 9, System inlet pipe; 91, System inlet; 92, System inlet connection port; 10, System return pipe; 101, System return port; 102, System return connection port. Detailed Implementation

[0042] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0044] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0046] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] This utility model provides a liquid cooling heat dissipation structure 100, such as Figure 1 As shown, it includes an inlet branch pipe 1, a return branch pipe 2, and multiple liquid cooling plates 3 arranged at intervals along the flow direction of the cooling medium (such as the vertical direction). The space between two liquid cooling plates 3 is used to arrange battery cells (not shown). Both the inlet branch pipe 1 and the return branch pipe 2 are connected to the multiple liquid cooling plates 3. The cooling medium flows through the inlet branch pipe 1, passes through the multiple liquid cooling plates 3, and then flows out through the return branch pipe 2. The inlet branch pipe 1 includes an inlet port 11 and multiple liquid cooling plate inlet connection ports 12. The multiple liquid cooling plate inlet connection ports 12 are connected to the multiple liquid cooling plates 3 in a one-to-one correspondence. The inlet port 11 is located between any two liquid cooling plate inlet connection ports 12. The diameter of the liquid cooling plate inlet connection port 12 closer to the inlet port 11 is larger than the diameter of the liquid cooling plate inlet connection port 12 farther away from the inlet port 11.

[0049] In this embodiment, both the inlet branch pipe 1 and the return branch pipe 2 are connected to multiple liquid cooling plates 3. The cooling medium enters the inlet branch pipe 1 through the inlet port 11, then flows into the multiple liquid cooling plates 3 one-to-one through the multiple liquid cooling plate inlet connection ports 12 on the inlet branch pipe 1, and then flows out of the liquid cooling structure 100 through the return branch pipe 2, which is connected to each liquid cooling plate 3. Two liquid cooling plates 3 dissipate heat for the battery cells placed between them. The inlet port 11 is located between any two liquid cooling plate inlet connection ports 12, and the diameter of the liquid cooling plate inlet connection port 12 closer to the inlet port 11 is larger than the diameter of the liquid cooling plate inlet connection port 12 farther from the inlet port 11. By adjusting the diameter of each liquid cooling plate inlet connection port 12, the flow rate of the coolant in the inlet branch pipe 1 can be distributed before flowing into each liquid cooling plate 3, ensuring the uniformity of the flow rate to each liquid cooling plate 3. The control of the flow rate of the liquid cooling plate 3 solves the problem of uneven coolant flow distribution in the original liquid cooling system, which leads to a short service life of the battery cells. At the same time, the parallel connection of the liquid cooling plates 3 helps to maintain the temperature consistency of each battery cell and reduce the temperature difference between them. Furthermore, the large surface of the liquid cooling plate 3 contacts the upper and lower surfaces of the battery cell for heat exchange, maximizing the heat exchange area and helping to ensure that the overall temperature of the battery cell is at the normal operating temperature. When this invention is applied to an energy storage system, the liquid cooling structure 100 can serve as a three-stage liquid cooling pipeline. Compared with the existing three-stage liquid cooling pipelines in energy storage systems, the liquid cooling structure 100 of this invention integrates the three-stage liquid cooling pipeline, reducing the number of quick-connect fittings, lowering the risk of pipeline leakage, reducing pipeline costs, and reducing the number of pipe openings with different diameter specifications in the pipeline.

[0050] As one implementation method, such as Figure 1 As shown, the return water branch pipe 2 includes a return water port 21 and multiple liquid-cooled plate return water connection ports 22, which are connected one-to-one with multiple liquid-cooled plates 3. The pipe diameter of the liquid-cooled plate inlet water connection port 12 connected to the same liquid-cooled plate 3 is the same as that of the liquid-cooled plate return water connection port 22. Among them, the design of the inlet water branch pipe 1 and the return water branch pipe 2 is basically the same. The return water port 21 is located between any two liquid-cooled plate return water connection ports 22. The pipe diameter of the liquid-cooled plate return water connection port 22 closer to the return water port 21 is larger than that of the liquid-cooled plate return water connection port 22 farther from the return water port 21, and the pipe diameter of the liquid-cooled plate inlet water connection port 12 connected to the same liquid-cooled plate 3 is the same as that of the liquid-cooled plate return water connection port 22.

[0051] As one implementation method, such as Figure 1 As shown, the position of the water inlet port 11 is lower than the position of the water return port 21, which is conducive to the exhaust of gas inside the liquid cooling heat dissipation structure 100.

[0052] As one implementation method, such as Figure 1 and Figure 2As shown, the water inlet port 11 is located between the two liquid cooling plate water inlet connection ports 12 at the bottom; the liquid cooling heat dissipation structure 100 includes n liquid cooling plates 3, and the water inlet branch pipe 1 includes n liquid cooling plate water inlet connection ports 12 that are connected one-to-one with the n liquid cooling plates 3, 3≦n≦5;

[0053] The diameter of the liquid cooling plate inlet water connection 12 is a n express:

[0054] When n=3, a1=(0.8-0.85)a, a2=a, a3=(0.7-0.75)a;

[0055] When n=4, a1=(0.8-0.85)a, a2=a, a3=(0.8-0.85)a, a4=(0.7-0.75)a;

[0056] When n=5, a1=(0.8-0.85)a, a2=a, a3=(0.88-0.93)a, a4=(0.8-0.85)a,

[0057] a5 = (0.7 - 0.75)a;

[0058] Where 'a' is a set value; multiple liquid cooling plate water inlet connections 12 are arranged sequentially from one end of the water inlet branch pipe 1 to the other end, and their pipe diameters are numbered sequentially as a1, a2, a3...a n a1 is the diameter of the liquid cooling plate inlet connection 12 located near the inlet port 11 and at one end of the inlet branch pipe 1. For example, when n=3, a1 can take any value between 0.8a and 0.85a, a2=a, and a3 can take any value between 0.7a and 0.75a; such as a1=0.8a, a2=a, a3=0.7a.

[0059] As one implementation method, such as Figure 8 and Figure 9 As shown, the liquid cooling plate 3 has a U-shaped flow channel inside. The U-shaped flow channel reduces the relative fluid flow distance, which reduces the pressure loss due to the extension and helps to reduce the flow resistance.

[0060] In one implementation, each liquid cooling plate inlet 12 is connected to each liquid cooling plate 3 via a quick-connect fitting (not shown), and each liquid cooling plate return inlet 22 is connected to each liquid cooling plate 3 via a quick-connect fitting (not shown). The use of quick-connect fittings for all pipe connections facilitates subsequent maintenance.

[0061] This utility model also provides a liquid cooling heat dissipation unit 200, such as Figure 3 As shown, it includes multiple liquid cooling heat dissipation structures 100 as described above, and the multiple liquid cooling heat dissipation structures 100 are arranged sequentially along the flow direction of the cooling medium (such as the vertical direction).

[0062] As one implementation method, such as Figure 3 and Figure 4 As shown, the liquid cooling heat dissipation unit 200 also includes a unit water inlet pipe 4 and a unit water return pipe 5. The unit water inlet pipe 4 includes a unit water inlet 41 and multiple unit water inlet connection ports 42, which are connected one-to-one with the water inlet ports 11 of the multiple liquid cooling heat dissipation structures 100. The unit water return pipe 5 includes a unit water return port 51 and multiple unit water return connection ports 52, which are connected one-to-one with the water return ports 21 of the multiple liquid cooling heat dissipation structures 100.

[0063] As one implementation method, such as Figure 3 and Figure 4 As shown, along the unit inlet pipe 4, the total number of unit inlet connection ports 42 is M, and the pipe diameters of two adjacent unit inlet connection ports 42 satisfy the following relationship:

[0064] b m =b m-1 +[0.15 / (M-1)]*b;

[0065] Where 4≦M≦10, 2≦m≦M, b1=0.85b, and b is a set value. m ≦b; Multiple unit water inlet connections 42 are arranged sequentially along the direction of cooling medium flow, and their pipe diameters are numbered sequentially as b1, b2, b3...b m b1 is the pipe diameter of the first unit water inlet connection port 42 closest to the unit water inlet 41; M and m are both positive integers. In this embodiment, the uniformity of the flow rate of each water inlet branch pipe 1 is ensured by adjusting the pipe diameter of each unit water inlet connection port 42; wherein, the liquid cooling heat dissipation unit 200 of this application is an energy storage single cluster overall cooling system, and when applied in an energy storage system, the liquid cooling heat dissipation unit 200 can be used as a secondary liquid cooling pipeline.

[0066] For example, such as Figure 3 and Figure 4 As shown, the total number of unit inlet connection ports 42 is M = 4, b1 = 0.85b, and b2 = 0.9b, b3 = 0.95b, b4 = b are obtained by calculation using the above formula; among them, the pipe diameter of the unit inlet connection port 42 can fluctuate within a certain range based on this value. For example, when b1 = 0.85, b2 = 0.93b, b3 = b, b4 = b, it can also play a role in adjusting the uniformity of the flow rate of the inlet branch pipe 1.

[0067] As one implementation method, such as Figure 3As shown, an air vent valve 6 is provided at one end of the unit water inlet pipe 4 away from the unit water inlet 41 and / or at one end of the unit water return pipe 5 away from the unit water return inlet 51. The air vent valve 6 is used to open and release air from the pipes when adding coolant during maintenance.

[0068] As one implementation method, such as Figure 3 As shown, a ball valve 7 and a drain valve 8 are provided at one end of the unit water inlet pipe 4 near the unit water inlet 41 and / or at one end of the unit water return pipe 5 near the unit water return inlet 51. The ball valve 7 is used to control the opening and closing of the water circuit of the single cluster, and the drain valve 8 is used to drain the coolant in the single cluster pipe during maintenance.

[0069] This utility model also provides a liquid cooling heat dissipation system, such as Figure 5 As shown, it includes multiple liquid cooling heat dissipation units 200 as described above, and the multiple liquid cooling heat dissipation units 200 are arranged sequentially along the flow direction of the cooling medium (such as the horizontal direction).

[0070] As one implementation method, such as Figure 5 and Figure 7 As shown, the liquid cooling system also includes a system inlet pipe 9 and a system return pipe 10. The system inlet pipe 9 includes a system inlet 91 and multiple system inlet connection ports 92, which are connected one-to-one with the unit inlets 41 of the multiple liquid cooling units 200. The system return pipe 10 includes a system return port 101 and multiple system return connection ports 102, which are connected one-to-one with the unit return ports 51 of the multiple liquid cooling units 200.

[0071] As one implementation method, such as Figure 5 and Figure 6 As shown, along the system inlet pipe 9, the total number of system inlet connection ports 92 is I, and the pipe diameters of adjacent system inlet connection ports 92 satisfy the following relationship:

[0072] c i =c i-1 +[0.35 / (I-1)]*c;

[0073] Where 4≦I≦8, 2≦i≦I, c1=0.65c, and c is a set value. i ≦c; Multiple system inlet water connections 92 are arranged sequentially along the direction of cooling medium flow, and their pipe diameters are numbered sequentially as c1, c2, c3...c ic1 is the pipe diameter of the first system inlet connection 92 closest to the system inlet 91; I and i are both positive integers. In this embodiment, the uniformity of flow rate in each unit inlet pipe 4 is ensured by adjusting the pipe diameter of each system inlet connection 92; wherein, the liquid cooling heat dissipation system of this application is an overall energy storage thermal management system, and when applied to an energy storage system, the liquid cooling heat dissipation system can be used as a primary liquid cooling pipeline.

[0074] For example, such as Figure 5 and Figure 6 As shown, the total number of system inlet connection ports 92 is I = 8, c1 = 0.65c. Calculated using the above formula, c2 = 0.7c, c3 = 0.75c, c4 = 0.8c, c5 = 0.85c, c6 = 0.9c, c7 = 0.95c, and c8 = c. The pipe diameter of the system inlet connection port 92 can fluctuate within a certain range based on these values. For example, when c1 = 0.65c, c2 = 0.69c, c3 = 0.76c, c4 = 0.83c, c5 = 0.9c, c6 = c, c7 = c, and c8 = c, it can also help to adjust the uniformity of the flow rate in the inlet branch pipe 1.

[0075] In one implementation, each system water inlet 92 is connected to the unit water inlet 41 of the liquid cooling heat dissipation unit 200 via a quick-connect fitting (not shown), and each system water return 102 is connected to the unit water return 51 of the liquid cooling heat dissipation unit 200 via a quick-connect fitting (not shown); the quick-connect structure is used for all pipe connections, which is beneficial for subsequent maintenance.

[0076] In one implementation, the outer surfaces of the inlet branch pipe 1, the return branch pipe 2, the unit inlet pipe 4, the unit return pipe 5, the system inlet pipe 9, and the system return pipe 10 are all provided with an insulation layer (not shown).

[0077] This utility model proposes a liquid cooling heat dissipation system. Compared with the traditional structure, this system adopts double-sided heat exchange technology of battery cells. The liquid cooling plate 3 adopts a parallel structure to ensure the consistency of the coolant flow in the liquid cooling plate 3. The upper and lower ends of the liquid cooling plate 3 are in contact with the air to regulate the overall temperature inside the energy storage container. The pipe connections all adopt a quick-connect structure, which is conducive to subsequent maintenance.

[0078] For example, such as Figures 1 to 7As shown, when the total inlet water flow rate of the liquid cooling system is 288 L / min, it is divided into eight liquid cooling units 200 through the system inlet pipe 9. By adjusting the inner diameter of the branch water nozzle at the branch tee, the flow rate of each liquid cooling unit 200 is distributed at (36±0.5) L / min to ensure the uniformity of the flow rate in each branch. Then, each liquid cooling unit 200 is divided into four liquid cooling structures 100 through the unit inlet pipe 4. Each liquid cooling structure 100 is then divided into three branches through the inlet branch pipe 1 to enter the liquid cooling plate 3. By adjusting the inner diameter of the inlet and outlet water nozzles of the liquid cooling plate 3, the flow rate of each liquid cooling plate 3 is distributed at (3±0.1) L / min to ensure the uniformity of the flow rate in each liquid cooling plate 3. Since there are water cooling plates on both the top and bottom of the battery cell for heat transfer, the overall temperature difference of the battery cell is smaller, keeping the battery cell operating at a temperature below 35℃.

[0079] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the present utility model's technical solution. These are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model's technical solution shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A liquid-cooled heat dissipation structure, characterized in that, It includes an inlet branch pipe (1), a return branch pipe (2), and multiple liquid cooling plates (3) arranged at intervals; the inlet branch pipe (1) and the return branch pipe (2) are both connected to the multiple liquid cooling plates (3), and the cooling medium flows through the inlet branch pipe (1) through the multiple liquid cooling plates (3) and then flows out through the return branch pipe (2); the inlet branch pipe (1) includes an inlet port (11) and multiple liquid cooling plate inlet connection ports (12), the multiple liquid cooling plate inlet connection ports (12) are connected to the multiple liquid cooling plates (3) one by one, the inlet port (11) is located between any two liquid cooling plate inlet connection ports (12), and the pipe diameter of the liquid cooling plate inlet connection port (12) closer to the inlet port (11) is larger than the pipe diameter of the liquid cooling plate inlet connection port (12) farther away from the inlet port (11).

2. The liquid cooling heat dissipation structure as described in claim 1, characterized in that, The return water branch pipe (2) includes a return water port (21) and multiple liquid cooling plate return water connection ports (22), and the multiple liquid cooling plate return water connection ports (22) are connected to the multiple liquid cooling plates (3) one by one; the pipe diameter of the liquid cooling plate inlet connection port (12) connected to the same liquid cooling plate (3) is the same as the pipe diameter of the liquid cooling plate return water connection port (22).

3. The liquid cooling heat dissipation structure as described in claim 2, characterized in that, The position of the water inlet port (11) is lower than the position of the water return port (21).

4. The liquid cooling heat dissipation structure as described in claim 1, characterized in that, The water inlet port (11) is located between the two liquid cooling plate water inlet connection ports (12) at the bottom; the liquid cooling heat dissipation structure (100) includes n liquid cooling plates (3), and the water inlet branch pipe (1) includes n liquid cooling plate water inlet connection ports (12) that are connected one-to-one with the n liquid cooling plates (3), 3≦n≦5; The diameter of the water inlet (12) of the liquid cooling plate is a n express: When n=3, a1=(0.8-0.85)a, a2=a, a3=(0.7-0.75)a; When n=4, a1=(0.8-0.85)a, a2=a, a3=(0.8-0.85)a, a4=(0.7-0.75)a; When n=5, a1=(0.8-0.85)a, a2=a, a3=(0.88-0.93)a, a4=(0.8-0.85)a, a5 = (0.7 - 0.75)a; Where 'a' is a set value; the multiple liquid cooling plate water inlet connections (12) are arranged sequentially from one end of the water inlet branch pipe (1) to the other end, and their pipe diameters are numbered sequentially as a1, a2, a3...a n a1 is the diameter of the liquid cooling plate inlet (12) located near the inlet port (11) and at one end of the inlet branch pipe (1).

5. The liquid cooling heat dissipation structure as described in claim 1, characterized in that, The liquid cooling plate (3) has a U-shaped flow channel inside.

6. A liquid-cooled heat dissipation unit, characterized in that, It includes a plurality of liquid cooling heat dissipation structures (100) as described in any one of claims 1-5, wherein the plurality of liquid cooling heat dissipation structures (100) are arranged sequentially along the flow direction of the cooling medium.

7. The liquid-cooled heat dissipation unit as described in claim 6, characterized in that, The liquid cooling heat dissipation unit (200) further includes a unit water inlet pipe (4) and a unit water return pipe (5). The unit water inlet pipe (4) includes a unit water inlet (41) and multiple unit water inlet connection ports (42). The multiple unit water inlet connection ports (42) are connected one-to-one with the water inlet ports (11) of the multiple liquid cooling heat dissipation structures (100). The unit water return pipe (5) includes a unit water return port (51) and multiple unit water return connection ports (52). The multiple unit water return connection ports (52) are connected one-to-one with the water return ports (21) of the multiple liquid cooling heat dissipation structures (100).

8. The liquid-cooled heat dissipation unit as described in claim 7, characterized in that, Along the unit water inlet pipe (4), the total number of unit water inlet connections (42) is M, and the pipe diameters of two adjacent unit water inlet connections (42) satisfy the following relationship: b m =b m-1 +[0.15 / (M-1)]*b; Where 4≦M≦10, 2≦m≦M, b1=0.85b, and b is a set value. m ≦b; Multiple unit water inlet connections (42) are arranged sequentially along the flow direction of the cooling medium, and their pipe diameters are numbered sequentially as b1, b2, b3...b m b1 is the diameter of the first unit inlet connection (42) closest to the unit inlet (41); M and m are both positive integers.

9. The liquid-cooled heat dissipation unit as described in claim 7, characterized in that, An air vent valve (6) is provided at the end of the unit water inlet pipe (4) away from the unit water inlet (41) and / or at the end of the unit water return pipe (5) away from the unit water return outlet (51).

10. The liquid-cooled heat dissipation unit as described in claim 7, characterized in that, A ball valve (7) and a drain valve (8) are provided at one end of the unit water inlet pipe (4) near the unit water inlet (41) and / or at one end of the unit water return pipe (5) near the unit water return inlet (51).

11. A liquid cooling heat dissipation system, characterized in that, It includes multiple liquid cooling heat dissipation units (200) as described in any one of claims 6-10.

12. The liquid cooling heat dissipation system as described in claim 11, characterized in that, The liquid cooling system further includes a system water inlet pipe (9) and a system water return pipe (10). The system water inlet pipe (9) includes a system water inlet (91) and multiple system water inlet connection ports (92). The multiple system water inlet connection ports (92) are connected one-to-one with the unit water inlets (41) of the multiple liquid cooling heat dissipation units (200). The system water return pipe (10) includes a system water return port (101) and multiple system water return connection ports (102). The multiple system water return connection ports (102) are connected one-to-one with the unit water return ports (51) of the multiple liquid cooling heat dissipation units (200).

13. The liquid cooling heat dissipation system as described in claim 12, characterized in that, Along the system inlet pipe (9), the total number of system inlet connections (92) is I, and the pipe diameters of adjacent system inlet connections (92) satisfy the following relationship: c i =c i-1 +[0.35 / (I-1)]*c; Where 4≦I≦8, 2≦i≦I, c1=0.65c, and c is a set value. i ≦c; Multiple system water inlet connections (92) are arranged sequentially along the flow direction of the cooling medium, and their pipe diameters are numbered sequentially as c1, c2, c3...c i c1 is the diameter of the first system inlet connection (92) closest to the system inlet (91); I and i are both positive integers.

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