An immersion type cooling liquid storage and circulation device

Abstract

The application provides an immersed cooling liquid storage and circulation device, relates to the technical field of energy storage and heat exchange, and comprises an outer shell, a sealing cover, an immersed liquid cavity, a liquid inlet pipe, a liquid outlet pipe, a vertical pipe, a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve. Through the cooperation of the liquid inlet pipe, the liquid outlet pipe, the vertical pipe and the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve, the internal and external circulation modes of fluorinated liquid in the immersed liquid cavity can be switched according to the heat generation of lithium batteries in different operation stages. Compared with the static fluorinated liquid in the immersed liquid cavity, the circulation mode adopted by the design can make the fluorinated liquid more flowable, and further improve the cooling efficiency of the lithium battery pack.

Description

Technical Field

[0001] This application relates to the field of energy storage and heat exchange technology, and in particular to an immersion coolant storage and circulation device. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems and other fields, lithium battery packs, as core energy storage and release components, have received widespread attention for their performance and safety.

[0003] Lithium battery packs generate a lot of heat during charging and discharging. In order to dissipate heat in a timely and effective manner, fluorinated liquid is usually poured into the casing to completely immerse the lithium battery pack in the fluorinated liquid, thereby cooling the lithium battery pack. However, the coolant poured into the casing is static and has poor fluidity, resulting in limited heat transfer efficiency and failing to fully utilize the advantages of immersion cooling. Utility Model Content

[0004] This application provides an immersion coolant storage and circulation device, which aims to solve the problems of poor coolant flow and low heat transfer efficiency in existing cooling methods.

[0005] To solve the above-mentioned technical problems, this application provides an immersion coolant storage and circulation device, including a housing and a sealing cover. When the sealing cover is connected to the top of the housing, the two together form an immersion chamber. An inlet pipe and an outlet pipe are respectively connected from bottom to top on one side of the housing. The device also includes a first solenoid valve installed on the inlet pipe and a second solenoid valve installed on the outlet pipe. A vertical pipe is connected between the outlet pipe and the inlet pipe. A third solenoid valve is installed on the vertical pipe. A liquid extraction mechanism is provided on the inlet pipe.

[0006] In some implementations, the liquid extraction mechanism includes a vertical cylinder fixedly connected to the inlet pipe. The inside of the vertical cylinder is provided with an infusion chamber that communicates with the internal channel of the inlet pipe. A mounting plate is fixedly connected to the bottom of the vertical cylinder, and a drive unit is fixedly connected to the bottom of the mounting plate. The output end of the drive unit is connected to a connecting shaft that is rotatably arranged on the vertical cylinder. Multiple circumferentially distributed impeller blades that are all in contact with the inner wall of the infusion chamber are fixedly connected to the surface of the connecting shaft.

[0007] In some implementations, when the connecting shaft rotates clockwise, both the first and second solenoid valves are in the open state, while the third solenoid valve is in the closed state.

[0008] In some implementations, when the connecting shaft rotates counterclockwise, both the first and second solenoid valves are in the closed state, while the third solenoid valve is in the open state.

[0009] In some implementations, a fan blade is installed at one end of the connecting shaft corresponding to the top of the vertical cylinder, and the fan blade is located below the liquid outlet pipe.

[0010] In some implementations, a baffle tube covering the fan blades is sleeved between the surfaces of the inlet pipe and the outlet pipe. The mounting plate is fixedly connected to the inner wall of the baffle tube. The bottom of the baffle tube is sealed, while the top surface is a uniformly distributed mesh.

[0011] In some implementations, a clamp is fixedly connected to the windshield, and the clamp is fixedly connected to one side of the outer shell.

[0012] By adopting the above technical solution, this application has the following beneficial effects compared with the prior art:

[0013] This application utilizes the coordinated operation of the inlet pipe, outlet pipe, vertical pipe, and the first, second, and third solenoid valves to switch the internal and external circulation modes of the fluorinated liquid in the immersion chamber according to the heat generation of the lithium battery at different operating stages. Compared to the static fluorinated liquid in the immersion chamber, this circulation method allows the fluorinated liquid to have stronger fluidity, thereby further improving the cooling efficiency of the lithium battery pack. Attached Figure Description

[0014] To more clearly illustrate the related technologies or the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the related technologies or the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application, and not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front cross-sectional view of an immersion coolant storage and circulation device provided in an embodiment of this application;

[0016] Figure 2 for Figure 1 Exploded view of the connection between the outer shell and the sealing plate;

[0017] Figure 3 for Figure 2 Schematic diagram of the connection structure between the middle windshield and the outer shell;

[0018] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the middle windshield;

[0019] Figure 5 for Figure 4 A top-section diagram of the central vertical cylinder.

[0020] The labels in the above figures are as follows: 1. Outer shell; 2. Sealing cover; 3. Immersion chamber; 4. Inlet pipe; 41. First solenoid valve; 42. Vertical cylinder; 43. Infusion chamber; 44. Mounting plate; 45. Drive unit; 46. Connecting shaft; 47. Impeller blade; 48. Fan blade; 49. Wind deflector; 410. Clamp; 5. Outlet pipe; 51. Second solenoid valve; 6. Vertical pipe; 61. Third solenoid valve. Detailed Implementation

[0021] Example 1: Refer to Figures 1-5 An immersion coolant storage and circulation device includes a housing 1 and a sealing cover 2. When the sealing cover 2 is connected to the top of the housing 1, the two together form an immersion chamber 3. The immersion chamber 3 is used to install a lithium battery pack. Fluoride is poured into the immersion chamber 3 until the lithium battery pack is completely submerged by the fluoride. Finally, the sealing cover 2 is fixed to the top of the housing 1 by screws, thereby realizing immersion cooling of the lithium battery pack.

[0022] Furthermore, to achieve the transformation of the fluorinated liquid in the immersion chamber 3 from static to dynamic circulation, an inlet pipe 4 and an outlet pipe 5 are connected from bottom to top on one side of the outer shell 1. It also includes a first solenoid valve 41 installed on the inlet pipe 4 and a second solenoid valve 51 installed on the outlet pipe 5. A vertical pipe 6 is connected between the outlet pipe 5 and the inlet pipe 4. A third solenoid valve 61 is installed on the vertical pipe 6. A liquid extraction mechanism is provided on the inlet pipe 4. The liquid extraction mechanism includes a vertical cylinder 42 fixedly connected to the inlet pipe 4. The inside of the vertical cylinder 42 is provided with a delivery chamber 43 that communicates with the internal channel of the inlet pipe 4. A mounting plate 44 is fixedly connected to the bottom of the vertical cylinder 42. A drive unit 45 is fixedly connected to the bottom of the mounting plate 44. The output end of the drive unit 45 is connected to a connecting shaft 46 that is rotatably arranged on the vertical cylinder 42. Multiple impeller blades 47 that are circumferentially distributed and all in contact with the inner wall of the delivery chamber 43 are fixedly connected to the surface of the connecting shaft 46.

[0023] In this technical solution, the inlet pipe 4 and outlet pipe 5 are connected to an external cooling device to form a circulation loop. Then, the drive unit 45, which uses a servo motor, is activated to drive the connecting shaft 46 to rotate clockwise. At this time, the first solenoid valve 41 and the second solenoid valve 51 are both in the open state, and the third solenoid valve 61 is in the closed state. As a result, the impeller 47 on the connecting shaft 46 rotates along the inner wall of the liquid delivery chamber 43, drawing the fluorinated liquid cooled by the external cooling device into the immersion chamber 3 through the inlet pipe 4. When the fluorinated liquid in the immersion chamber 3 is higher than the port of the outlet pipe 5, the fluorinated liquid will flow back to the external cooling device through the outlet pipe 5 for cooling. This external circulation is repeated. Compared with the static fluorinated liquid in the immersion chamber 3, this circulation method has better fluidity and can further improve the cooling efficiency of the lithium battery pack.

[0024] Further optimization involves the following: when the drive unit 45 drives the impeller 47 on the connecting shaft 46 to rotate counterclockwise along the inner wall of the liquid delivery chamber 43, the first solenoid valve 41 and the second solenoid valve 51 are both closed, while the third solenoid valve 61 is open. At this time, the fluorinated liquid in the immersion chamber 3 is drawn into the outlet pipe 5 connected to the vertical pipe 6 through the inlet pipe 4. Finally, the fluorinated liquid in the outlet pipe 5 returns to the immersion chamber 3, and this internal circulation is repeated. Compared with the static fluorinated liquid in the immersion chamber 3, this internal circulation method has better fluidity and can further improve the cooling efficiency of the lithium battery pack. At the same time, the lithium battery generates less heat in the early stage and more heat in the later stage. Therefore, the internal circulation cooling method can be used in the early stage, and the external circulation method can be used in the later stage. This allows for matching the appropriate cooling strategy according to the heat generation characteristics of the lithium battery at different operating stages. This ensures the efficient and energy-saving operation of the cooling system in the early stage and effectively removes the large amount of heat generated by the lithium battery in the later stage, maintaining the lithium battery in a suitable temperature range, extending its service life, and improving the stability and reliability of the entire battery system.

[0025] It is important to note that, in order to monitor the temperature of the fluorinated liquid in real time, a temperature sensor can be installed on the side wall of the casing in practical applications, such as... Figure 1 As shown.

[0026] Example 2: Refer to Figure 1 and Figure 5 Based on the above embodiment 1, the difference is that a fan blade 48 is installed at the end of the connecting shaft 46 corresponding to the top of the vertical cylinder 42. The fan blade 48 is located below the liquid outlet pipe 5. When the connecting shaft 46 rotates, the fan blade 48 blows air onto the surface of the liquid outlet pipe 5, reducing the heat of the fluorinated liquid in the liquid outlet pipe 5. In this way, when the device is in external circulation mode, it can reduce the cooling time of the external cooling device on the fluorinated liquid and improve the overall cooling efficiency. When the device is in internal circulation mode, it can also help reduce the temperature of the circulating fluorinated liquid in the immersion chamber 3 to a certain extent, avoiding the impact of heat accumulation on the performance of the lithium battery pack during internal circulation, and further ensuring the stable operation of the lithium battery pack in a suitable temperature environment.

[0027] Furthermore, a baffle 49 covering the fan blade 48 is sleeved between the surfaces of the inlet pipe 4 and the outlet pipe 5. The mounting plate 44 is fixedly connected to the inner wall of the baffle 49. The bottom of the baffle 49 is sealed, while the top surface is a uniformly distributed mesh. A clamp 410 is fixedly connected to the baffle 49 and to one side of the outer casing 1. This helps to concentrate the airflow blown by the fan blade 48 onto the surface of the outlet pipe 5. Because the mesh structure at the top of the baffle 49 can guide and constrain the airflow while ensuring a certain amount of ventilation, the airflow generated by the fan blade 48 is more concentrated on the surface of the outlet pipe 5, thereby more effectively reducing the temperature of the fluorinated liquid in the outlet pipe 5 and improving the efficiency of the entire cooling system.

[0028] It should be noted that the several embodiments shown above in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in the textual description of this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply such an actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus; and, without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Furthermore, those skilled in the art can implement or use this application by practicing the several embodiments shown above. Various modifications to the embodiments shown above will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the several embodiments shown above, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A submersible coolant storage and circulation device, comprising: Outer casing (1) and sealing cap (2); When the sealing cap (2) is connected to the top of the outer shell (1), the two together form an immersion chamber (3), and one side of the outer shell (1) is connected from bottom to top to an inlet pipe (4) and an outlet pipe (5); characterized in that it further includes: A first solenoid valve (41) is installed on the inlet pipe (4) and a second solenoid valve (51) is installed on the outlet pipe (5). A vertical pipe (6) connects the outlet pipe (5) and the inlet pipe (4). A third solenoid valve (61) is installed on the vertical pipe (6). A liquid extraction mechanism is provided on the inlet pipe (4).

2. The immersion coolant storage and circulation device according to claim 1, characterized in that, The liquid extraction mechanism includes a vertical cylinder (42) fixedly connected to the liquid inlet pipe (4). The inside of the vertical cylinder (42) is provided with an infusion chamber (43) that communicates with the internal channel of the liquid inlet pipe (4). A mounting plate (44) is fixedly connected to the bottom of the vertical cylinder (42). A drive unit (45) is fixedly connected to the bottom of the mounting plate (44). The output end of the drive unit (45) is connected to a connecting shaft (46) that is rotatably arranged on the vertical cylinder (42). Multiple impeller blades (47) that are circumferentially distributed and all in contact with the inner wall of the infusion chamber (43) are fixedly connected to the surface of the connecting shaft (46).

3. The immersion coolant storage and circulation device according to claim 2, characterized in that, When the connecting shaft (46) rotates clockwise, the first solenoid valve (41) and the second solenoid valve (51) are both in the open state, and the third solenoid valve (61) is in the closed state.

4. The immersion coolant storage and circulation device according to claim 2, characterized in that, When the connecting shaft (46) rotates counterclockwise, the first solenoid valve (41) and the second solenoid valve (51) are both in the closed state, and the third solenoid valve (61) is in the open state.

5. The immersion coolant storage and circulation device according to claim 4, characterized in that, The connecting shaft (46) is equipped with a fan blade (48) at one end corresponding to the top of the vertical cylinder (42), and the fan blade (48) is located below the liquid outlet pipe (5).

6. The immersion coolant storage and circulation device according to claim 5, characterized in that, A baffle (49) covering the fan blade (48) is sleeved between the surfaces of the inlet pipe (4) and the outlet pipe (5). The mounting plate (44) is fixedly connected to the inner wall of the baffle (49). The bottom of the baffle (49) is sealed, while the top surface is a uniformly distributed mesh.

7. The immersion coolant storage and circulation device according to claim 6, characterized in that, A clamp (410) is fixedly connected to the windshield (49), and the clamp (410) is fixedly connected to one side of the outer shell (1).

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