Battery cluster liquid cooling device for energy storage container

Abstract

The utility model discloses a liquid cooling device for a battery cluster of an energy storage container. The liquid cooling device comprises a box body, a cooling pipe, a return pipe, an exhaust valve and a liquid cooling unit, wherein a battery plug-in box is arranged in the box body; the cooling pipe and the return pipe are arranged in the box body; a water inlet and a water outlet which are communicated with each other are formed in the battery plug-in box, the cooling pipe is communicated with the water inlet, the return pipe is communicated with the water outlet, the liquid cooling unit is used for conveying cold water to the cooling pipe, and the exhaust valve is used for exhausting air in the cooling pipe. According to the energy storage container, the heat exchange efficiency of cold water and the energy storage container can be improved, and the cooling effect of the energy storage container is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage batteries, and particularly relates to a liquid cooling device for a battery cluster of an energy storage container. Background Art

[0002] An energy storage container is a closed container integrating devices such as energy storage batteries, an energy management system, and a power electronic converter. The working principle of the energy storage container is to store electric energy in the batteries inside the container and release it when needed to provide services such as peak shaving, frequency modulation, and demand response for the power system. However, a large amount of heat is generated during the operation of the batteries, causing the temperature of the entire energy storage container to rise. Excessive temperature can lead to the spread of thermal runaway of the batteries in the whole container and explosion. Therefore, it is necessary to cool down the energy storage container.

[0003] The invention patent with the application number CN202311172741.3 discloses a refrigeration system for a liquid-cooled energy storage container. The system is provided with two cooling machines, an emergency liquid outlet pipeline assembly, and an emergency liquid return pipeline assembly. The two ends of the emergency liquid outlet pipeline assembly are respectively communicated with one side of each liquid outlet main pipe close to the liquid outlet, the two ends of the emergency liquid return pipeline assembly are respectively connected with one side of each liquid return main pipe close to the liquid return port, and the emergency liquid outlet valve is configured to open the valve of the emergency liquid outlet valve when the temperature of the battery cluster is greater than a first preset temperature and / or the cooling machine fails. However, during the operation of the system, air inevitably enters the liquid outlet pipe. The presence of air occupies a part of the space of the water pipe, narrowing the flow channel of the water flow. And due to the differences in physical properties such as density and viscosity between air and water, additional resistance and disturbance will be generated when the water flow passes through the air section. The existence of resistance and disturbance reduces the flow velocity of the water flow. The water flow in the second half of the air section will increase in temperature due to the longer flow time in the energy storage container. The temperature difference during the heat exchange between the water flow and the energy storage container decreases, and the heat exchange efficiency between the water flow and the energy storage container is reduced, thereby reducing the cooling effect of the energy storage container. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a liquid cooling device for a battery cluster of an energy storage container, which improves the heat exchange efficiency between cold water and the energy storage container, and thus improves the cooling effect of the energy storage container.

[0005] The technical solution adopted by the present utility model to solve its technical problems is to propose a liquid cooling device for a battery cluster in an energy storage container, which includes a box body with battery insertion boxes arranged inside, a cooling pipe and a return pipe arranged in the box body, an exhaust valve arranged on the cooling pipe, and a liquid cooling unit arranged outside the box body; the battery insertion box is provided with a water inlet and a water outlet that are communicated with each other, the cooling pipe is communicated with the water inlet, the return pipe is communicated with the water outlet, the liquid cooling unit is used to convey cold water to the cooling pipe, and the exhaust valve is used to discharge the air in the cooling pipe.

[0006] In an embodiment of the present application, the cooling pipe includes a first pipe, a second pipe, and a third pipe with sequentially decreasing inner diameters; one end of the first pipe is connected to the liquid cooling unit, one end of the third pipe is connected to the water inlet, one end of the second pipe is connected to the first pipe, and the other end is connected to the other end of the third pipe. The extending direction of the third pipe is the same as the arrangement direction of the battery insertion box, and the exhaust valve is arranged on the side of the second pipe away from the first pipe.

[0007] In an embodiment of the present application, a plastic on-off valve is arranged on the second pipe.

[0008] In an embodiment of the present application, a butterfly valve is arranged at one end of the first pipe connected to the liquid cooling unit.

[0009] In an embodiment of the present application, a drain valve is arranged at the other end of the first pipe.

[0010] In an embodiment of the present application, a first connecting block is arranged on the second pipe, and a second connecting block is arranged on the inner surface of the box body. The first connecting block and the second connecting block are fitted to fix the second pipe.

[0011] In an embodiment of the present application, a baffle is arranged on the first connecting block, and the baffle is arranged on the side of the first connecting block away from the first pipe.

[0012] In an embodiment of the present application, the return pipe includes a fourth pipe, a fifth pipe, and a sixth pipe with sequentially increasing inner diameters. One end of the fourth pipe is communicated with the water outlet of the battery insertion box, and the other end is communicated with the fifth pipe. One end of the fifth pipe is communicated with the sixth pipe, and the sixth pipe is communicated with the liquid cooling unit.

[0013] In an embodiment of the present application, the third pipe is a corrugated pipe.

[0014] In an embodiment of the present application, the cooling pipe and the return pipe are made of polyethylene.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. An energy storage container battery cluster liquid cooling device proposed by the present utility model discharges the air in the cooling pipe by setting an exhaust valve to accelerate the flow rate of cold water in the cooling pipe. The temperature difference during the heat exchange between the cold water and the battery insertion box increases, improving the heat exchange efficiency between the cold water and the energy storage container, and further enhancing the cooling effect of the energy storage container. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings incorporated herein and constituting a part of this specification illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model. In these drawings, like reference numerals are used to represent like elements. The drawings in the following description are some embodiments of the present utility model, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Front view of an energy storage container battery cluster liquid cooling device according to an embodiment of the present utility model;

[0019] Figure 2 Top view of an energy storage container battery cluster liquid cooling device according to an embodiment of the present utility model;

[0020] Figure 3 Schematic diagram of the cooling pipe and the return pipe of an energy storage container battery cluster liquid cooling device according to an embodiment of the present utility model;

[0021] Figure 4 For an embodiment of the present utility model Figure 3 Enlarged view of part A;

[0022] Figure 5 For an embodiment of the present utility model Figure 3 Enlarged view of part B;

[0023] Figure 6 For an embodiment of the present utility model Figure 3 Enlarged view of part C;

[0024] Figure 7 Second pipe connection schematic diagram of an energy storage container battery cluster liquid cooling device according to an embodiment of the present utility model;

[0025] Figure 8 Schematic diagram of the connection between the first connection block and the second connection block of an energy storage container battery cluster liquid cooling device according to an embodiment of the present utility model;

[0026] Figure 9 Front view of the battery insertion box of an energy storage container battery cluster liquid cooling device according to an embodiment of the present utility model.

[0027] In the figure: 1. Battery insertion box; 2. Box body; 3. Cooling pipe; 31. First pipe; 32. Second pipe; 33. Third pipe; 34. Plastic switching valve; 35. Butterfly valve; 36. Drain valve; 37. First connection block; 38. Second connection block; 39. Baffle; 4. Return pipe; 41. Fourth pipe; 42. Fifth pipe; 43. Sixth pipe; 5. Exhaust valve; 6. Liquid cooling unit; 7. Water inlet; 8. Water outlet. Detailed implementation mode

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention and the prior art, the specific implementation modes of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts, and other implementation modes can also be obtained. In addition, the terms related to orientation only represent the relative positional relationship between components, rather than the absolute positional relationship.

[0029] The embodiment of the present invention provides a liquid cooling device for a battery cluster of an energy storage container. Please refer to Figures 1-9 , which mainly includes a battery insertion box 1, a box body 2, a cooling pipe 3, a return pipe 4, an exhaust valve 5, and a liquid cooling unit 6.

[0030] In the embodiment of the present application, the liquid cooling device for the battery cluster of the energy storage container includes a box body 2, and a battery insertion box 1, a cooling pipe 3, and a return pipe 4 are arranged in the box body 2 to Figure 1Taking [reference benchmark], the battery cassette 1 is a plurality of cassette groups arranged side by side in the box body 2, and each cassette group is composed of battery cassettes 1 stacked from bottom to top. An exhaust valve 5 is provided on the cooling pipe 3, a liquid cooling unit 6 is provided outside the box body 2, a water inlet 7 and a water outlet 8 are provided on the battery cassette 1, the water inlet 7 and the water outlet 8 are communicated with each other, cold water enters from the water inlet 7 and then flows out from the water outlet 8, thereby cooling the battery cassette 1. The cooling pipe 3 is communicated with the water inlet 7, and the return pipe 4 is communicated with the water outlet 8. The liquid cooling unit 6 is started to convey cold water into the cooling pipe 3, and the cold water sequentially passes through the cooling pipe 3, the water inlet 7, the water outlet 8, and the return pipe 4, cooling the battery cassette 1 during the whole process. The exhaust valve 5 is provided on the cooling pipe 3. When there is residual air inside the cooling pipe 3, the exhaust valve 5 will automatically open the valve due to the inconsistent pressure inside and outside the cooling pipe 3. At this time, the residual air inside the cooling pipe 3 will be discharged from the exhaust valve 5. Compared with the prior art, the liquid outlet pipe will inevitably introduce air, and the existence of air will occupy a part of the space of the water pipe, making the water flow channel narrower. And due to the differences in physical properties such as the density and viscosity of air and water, it will cause additional resistance and disturbance when the water flow passes through the air section. The existence of resistance and disturbance reduces the flow velocity of the water flow. The water flow in the second half of the air section will increase in temperature due to the increase in the flow time in the energy storage container. The temperature difference during the heat exchange between the water flow and the energy storage container decreases, and the heat exchange efficiency between the water flow and the energy storage container decreases, thereby reducing the cooling effect of the energy storage container. In this application, by providing the exhaust valve 5 to discharge the air in the cooling pipe 3, the flow velocity of the cold water in the cooling pipe 3 is increased, the temperature difference during the heat exchange between the cold water and the battery cassette 1 is increased, the heat exchange efficiency between the cold water and the energy storage container is improved, and thereby the cooling effect of the energy storage container is improved.

[0031] Specifically, both the cooling pipe 3 and the return pipe 4 are arranged on the same side of the battery cassette 1.

[0032] In an implementable manner, the cooling pipe 3 includes a first pipe 31, a second pipe 32, and a third pipe 33 with sequentially decreasing inner diameters. The first pipe 31 is fixed on the bottom surface of the box body 2. One end of the first pipe 31 is connected to the liquid cooling unit 6, one end of the third pipe 33 is connected to the water inlet 7, one end of the second pipe 32 is connected to the first pipe 31, and the other end is connected to the other end of the third pipe 33. The extending direction of the second pipe 32 is the same as the stacking direction of the battery cassettes 1 in the cassette group. The exhaust valve 5 is arranged on the side of the second pipe 32 away from the first pipe 31. The second pipe 32 is arranged perpendicular to the bottom surface of the box body 2. One end of the second pipe 32 close to the first pipe 31 is a curved pipe. The number of the second pipes 32 is equal to the number of the cassette groups, and the number of the third pipes 33 is equal to the number of the battery cassettes included in each cassette group, so as to ensure that each battery cassette 1 in the box body 2 is communicated. The inner diameters of the first pipe 31, the second pipe 32, and the third pipe 33 are sequentially decreased, so as to ensure that the flow rate of the cold water in the second pipe 32 and the third pipe 33 remains unchanged after shunting. The exhaust valve 5 is arranged on the side of the second pipe 32 away from the first pipe 31, and the second pipe 32 is placed perpendicular to the bottom surface of the box body 2. Since the density of water is greater than the density of air under standard conditions, the residual air in the cooling pipe 3 will gradually rise to the position of the exhaust valve 5, which is convenient for the exhaust valve 5 to drain the water in time.

[0033] Further, a plastic switch valve 34 is arranged on the second pipe 32. During the process of transporting cold water through the pipeline, all the plastic switch valves 34 can be closed, so as to avoid the phenomenon of liquid leakage.

[0034] Further, a butterfly valve 35 is arranged at one end of the first pipe 31 connected to the liquid cooling unit 6. When the liquid cooling unit 6 has problems, the butterfly valve 35 can be closed, so as to cut off the connection between the liquid cooling unit 6 and the cooling pipe 3, and then replace the liquid cooling unit 6.

[0035] Further, a drain valve 36 is arranged at the other end of the first pipe 31.

[0036] Preferably, the third pipe 33 is a corrugated pipe, so as to facilitate the connection between the third pipe 33 and the battery cassette 1.

[0037] In an implementable manner, a first connection block 37 is arranged on the second pipe 32, and a second connection block 38 is arranged on the inner surface of the box body 2. The first connection block 37 is fixedly connected to the second pipe 32, the second connection block 38 is fixedly connected to the inner surface of the box body 2, and the first connection block 37 is fitted with the second connection block 38, so as to fix the second pipe 32 on the side surface of the box body 2. As described above, the second pipe 32 is arranged perpendicular to the bottom surface of the box body 2, and thus multiple connection points are required to stably fix the second pipe 32. By arranging the first connection block 37 and the second connection block 38 that can be mutually fitted, the fitting and fixing method saves the time required for the installation and disassembly of the second pipe 32 compared with other fixing methods.

[0038] Specifically, a baffle 39 is provided on the first connecting block 37. The baffle 39 is arranged on the side of the first connecting block 37 away from the first pipe 31. When the first connecting block 37 is fitted with the second connecting block 38, the baffle 39 abuts against the surface of the second connecting block 38. By setting the baffle 39 to abut against the second connecting block 38, the fixed position of the second pipe 32 is defined.

[0039] In an implementable embodiment, the reflux pipe 4 includes a fourth pipe 41, a fifth pipe 42, and a sixth pipe 43 with sequentially increasing inner diameters. One end of the fourth pipe 41 is communicated with the water outlet 8 of the battery cassette 1, and the other end is communicated with the fifth pipe 42. One end of the fifth pipe 42 is communicated with the sixth pipe 43, and the sixth pipe 43 is communicated with the liquid cooling unit 6. The extending direction of the fifth pipe 42 is the same as the stacking direction of the battery cassettes 1 in the cassette group. The fifth pipe 42 is arranged perpendicular to the bottom surface of the box body 2. The end of the fifth pipe 42 close to the sixth pipe 43 is a curved pipe. The number of the fifth pipes 42 is equal to the number of the cassette groups, and the number of the fourth pipes 41 is equal to the number of the battery cassettes included in each cassette group, so that the cold water in the battery cassette 1 can flow back to achieve the effect of continuous cooling. The liquid cooling unit 6 first diverts the cold water to the first pipe 31, then through the second pipe 32 and the third pipe 33, it is distributed to the water inlet 7 of each battery cassette 1, and then flows out from the water outlet 8 of the battery cassette 1, converges into the sixth pipe 43 through the fourth pipe 41 and the fifth pipe 42, and then flows back to the liquid cooling unit 6.

[0040] In an implementable embodiment, the liquid cooling unit 6 includes a compressor and a water pump. The compressor compresses the refrigerant into a high-pressure gas, and the high-pressure gas is cooled by the condenser to achieve refrigeration, thereby reducing the temperature of the water in the refrigeration unit to form cold water. Then the water pump is started to transport the cold water to the cooling pipe 3 and flow back to the liquid cooling unit 6 through the reflux pipe 4.

[0041] In an implementable embodiment, both the cooling pipe 3 and the reflux pipe 4 are made of polyethylene. At each pipe connection, a connection method of fusing or injecting a polyethylene pipe and a stainless steel chuck is used for connection, thereby improving the sealing performance of the pipes and avoiding pipe leakage.

[0042] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0043] The above content is a further detailed description of the present utility model in conjunction with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present utility model are only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A liquid cooling device for a battery cluster of an energy storage container, characterized in that, It includes a box body (2) with a battery cartridge (1) arranged inside, a cooling pipe (3) and a return pipe (4) arranged in the box body (2), an exhaust valve (5) arranged on the cooling pipe (3), and a liquid cooling unit (6) arranged outside the box body (2); the battery cartridge (1) is provided with a water inlet (7) and a water outlet (8) that are communicated with each other, the cooling pipe (3) is communicated with the water inlet (7), the return pipe (4) is communicated with the water outlet (8), the liquid cooling unit (6) is used to convey cold water to the cooling pipe (3), and the exhaust valve (5) is used to discharge the air in the cooling pipe (3).

2. The liquid cooling device for the battery cluster of the energy storage container according to claim 1, wherein The cooling pipe (3) includes a first pipe (31), a second pipe (32), and a third pipe (33) with gradually decreasing inner diameters; one end of the first pipe (31) is connected to the liquid cooling unit (6), one end of the third pipe (33) is connected to the water inlet (7), one end of the second pipe (32) is connected to the first pipe (31), and the other end is connected to the other end of the third pipe (33). The extending direction of the third pipe (33) is the same as the arrangement direction of the battery cartridge (1), and the exhaust valve (5) is arranged on the side of the second pipe (32) away from the first pipe (31).

3. The liquid cooling device for the battery cluster of the energy storage container according to claim 2, wherein A plastic switch valve (34) is arranged on the second pipe (32).

4. The liquid cooling device for the battery cluster of the energy storage container according to claim 2, characterized in that, A butterfly valve (35) is arranged at one end of the first pipe (31) connected to the liquid cooling unit (6).

5. The liquid cooling device for the battery cluster of an energy storage container according to claim 2, characterized in that, A liquid discharge valve (36) is arranged at the other end of the first pipe (31).

6. The liquid cooling device for the battery cluster of the energy storage container according to claim 2, characterized in that, A first connection block (37) is arranged on the second pipe (32), and a second connection block (38) is arranged on the inner surface of the box body (2). The first connection block (37) and the second connection block (38) are fitted to fix the second pipe (32).

7. The liquid cooling device for the battery cluster of the energy storage container according to claim 6, wherein, A baffle (39) is arranged on the first connection block (37), and the baffle (39) is arranged on the side of the first connection block (37) away from the first pipe (31).

8. The liquid cooling device for the battery cluster of an energy storage container according to claim 1, wherein The return pipe (4) includes a fourth pipe (41), a fifth pipe (42), and a sixth pipe (43) with gradually increasing inner diameters. One end of the fourth pipe (41) is communicated with the water outlet (8) of the battery cartridge (1), and the other end is communicated with the fifth pipe (42). One end of the fifth pipe (42) is communicated with the sixth pipe (43), and the sixth pipe (43) is communicated with the liquid cooling unit (6).

9. The liquid cooling device for the battery cluster of an energy storage container according to claim 2, wherein The third pipe (33) is a corrugated pipe.

10. The liquid cooling device for the battery cluster of an energy storage container according to claim 1, characterized in that, The cooling pipe (3) and the return pipe (4) are made of polyethylene.

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