Immersed cooling device and immersed energy storage system

Abstract

The utility model discloses an immersed cooling device and an immersed energy storage system. The immersed cooling device comprises a box body, a plurality of water cooling cabins and a liquid inlet pipe, specifically, an accommodating space is formed in the box body; the water-cooling cabins are arranged in the containing space, each water-cooling cabin comprises a cabin body and a cabin opening guide pipe, a water-cooling groove is formed in each cabin body, the water-cooling grooves are used for containing batteries, and the water-cooling grooves are communicated with the cabin opening guide pipes; the cross section area of the liquid inlet pipe is larger than the sum of the cross section areas of all the hatch guide pipes. The cross sectional area of the liquid inlet pipe is larger than the sum of the cross sectional areas of the hatch guide pipes, in the working process of the immersed cooling device, the liquid supply flow of the liquid inlet pipe can guarantee that the hydraulic pressure of the hatch guide pipes is constant, and the flow speed of the hatch guide pipes is stable and uniform.

Description

Technical Field

[0001] This utility model relates to the field of battery equipment technology, and in particular to an immersion cooling device and an immersion energy storage system. Background Technology

[0002] During battery use, heat generation is inevitable. Therefore, effective and stable cooling components are indispensable for large battery modules. Immersion cooling is a method of cooling that involves immersing the device in a coolant. The coolant provides comprehensive cooling, thereby reducing the device's temperature and extending its lifespan.

[0003] Because battery modules are integrated, a single immersion cooling system needs to cool multiple battery groups simultaneously. The cooling efficiency varies depending on the battery placement, which is detrimental to system temperature control. Therefore, an immersion cooling system capable of stably and uniformly cooling different batteries is of significant practical importance to the entire battery equipment industry. Utility Model Content

[0004] One objective of this invention is to provide an immersion cooling device that addresses the technical problem of uneven cooling power among multiple targets during immersion cooling.

[0005] To achieve the above objectives, this utility model provides a solution: an immersion cooling device, comprising a housing, multiple water-cooled chambers, and an inlet pipe. Specifically, the housing forms an accommodating space; the water-cooled chambers are disposed within the accommodating space, each water-cooled chamber comprising a chamber body and a hatch conduit, the chamber body having a water-cooling tank for holding batteries, the water-cooling tank being connected to the hatch conduit; the inlet pipe is connected to the hatch conduit, and the cross-sectional area of ​​the inlet pipe is greater than the sum of the cross-sectional areas of all the hatch conduits.

[0006] In some embodiments of this application, the cross-sections of the inlet pipe and the hatch conduit are both circular.

[0007] In some embodiments of this application, the diameter of the inlet pipe is D1, the diameter of the hatch conduit is D2, and D1≥3*D2.

[0008] In some embodiments of this application, the diameter of the inlet pipe is D1, 20mm≤D1≤25mm; the diameter of the hatch conduit is D2, 4≤D2≤6mm.

[0009] In some embodiments of this application, the immersion cooling device further includes a liquid distribution pipe, the inlet pipe being connected to a plurality of liquid distribution pipes, and each liquid distribution pipe being connected to at least a plurality of hatch conduits.

[0010] In some embodiments of this application, multiple water-cooled chambers are stacked along the height of the housing to form a water-cooling group, and the multiple water-cooling groups are arranged along the length of the housing, with each water-cooling group connected to a liquid distribution pipe.

[0011] In some embodiments of this application, the immersion cooling device further includes a liquid distribution pipe, the liquid inlet pipe is connected to multiple liquid distribution pipes, and the liquid distribution pipes are connected to the hatch conduits one by one.

[0012] In some embodiments of this application, each water-cooled tank is provided with an overflow port at the top for overflowing coolant; a drain port is provided at the end of the tank away from the overflow port, the drain port is connected to the accommodating space, and the drain port is used to discharge coolant.

[0013] In some embodiments of this application, the connection point between the hatch duct and the water cooling tank is higher than the connection point between the hatch duct and the liquid inlet pipe.

[0014] In some embodiments of this application, the hatch conduit includes a first pipe, a second pipe, a third pipe, and a fourth pipe connected vertically in sequence, with the first pipe perpendicular to the hatch body and the fourth pipe perpendicular to the liquid inlet pipe.

[0015] To achieve the above objectives, the present invention provides a solution as follows: an immersion energy storage system, which includes a battery and any of the above-mentioned immersion cooling devices, wherein the battery is thermally heated within a water-cooled chamber.

[0016] The beneficial effects of this utility model are as follows:

[0017] This application comprises multiple water-cooled chambers housed within a accommodating space. Each water-cooled chamber includes a chamber body and a hatch conduit. A water-cooling tank formed on the chamber body is connected to the hatch conduit, and an inlet pipe is connected to each hatch conduit. Furthermore, the sum of the cross-sectional areas of the inlet pipes is greater than the sum of the cross-sectional areas of all hatch conduits. The battery is placed in the water-cooled tank, and coolant flows into each water-cooled tank through the inlet pipe and the hatch conduit, thus cooling the battery.

[0018] Compared with the prior art, the cross-sectional area of ​​the liquid inlet pipe of this application is greater than the sum of the cross-sectional areas of the conduits of each hatch. During the operation of the immersion cooling device of this application, the liquid supply flow rate of the liquid inlet pipe can ensure that the hydraulic pressure of each conduit is constant, and the flow rate of each conduit is stable and the flow rate is uniform. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the immersion cooling device provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the immersion cooling device provided in this embodiment of the present invention after removing part of the housing;

[0022] Figure 3 It is along Figure 1 Schematic diagram of the cross section of line AA in the middle;

[0023] Figure 4 It is along Figure 2 Schematic diagram of the cross section of the middle BB line;

[0024] Figure 5 This is a schematic diagram of the structure of the immersion cooling device provided in this embodiment of the present invention after the casing has been removed;

[0025] Figure 6 This utility model provides a liquid supply method for the liquid inlet pipe and water cooling chamber of the immersion cooling device.

[0026] Figure 7 This utility model provides a liquid supply method for the liquid inlet pipe and water cooling chamber of the immersion cooling device.

[0027] Figure 8 yes Figure 5 A magnified view of a portion of region C.

[0028] Explanation of icon numbers:

[0029] 10. Box body; 11. Storage space; 12. Drain outlet; 13. Pressure relief outlet; 14. Inspection port; 20. Water-cooled chamber; 21. Chamber body; 211. Water-cooled tank; 22. Hatch conduit; 221. First pipe; 222. Second pipe; 223. Third pipe; 224. Fourth pipe; 30. Liquid inlet pipe; 40. Liquid distribution pipe. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Immersion cooling is a common equipment cooling method that achieves higher cooling efficiency by immersing the entire device to be cooled in a coolant, thus increasing the contact area. Compared to liquid cooling methods such as heat pipes, immersion cooling systems typically have lower noise levels because the entire device is submerged in the coolant. However, immersion cooling requires the design of a water-cooling tank 211, the cross-sectional area of ​​which is usually several times the cross-sectional area of ​​the coolant flow channel. Therefore, significant disturbances occur as the coolant flows into the water-cooling tank 211. Compared to the constant diameter of a heat pipe, when an immersion cooling system simultaneously cools multiple water-cooling tanks 211, there are noticeable differences in coolant flow rate and cooling efficiency among the tanks.

[0032] Please see Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the overall structure of the immersion cooling device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the structure of the immersion cooling device provided in this embodiment of the present invention after removing part of the box 10; Figure 3 It is along Figure 1 Schematic diagram of the cross section of line AA in the middle;

[0033] Figure 4 It is along Figure 2 Schematic diagram of the cross section of the middle BB line; Figure 5 This is a schematic diagram of the structure of the immersion cooling device provided in this embodiment of the present invention after removing the housing 10.

[0034] To solve the above-mentioned technical problems, this utility model provides an immersion cooling device, which includes a housing 10, multiple water-cooled chambers 20 and a liquid inlet pipe 30.

[0035] Specifically, the enclosure 10 forms an internal accommodating space 11; water-cooled chambers 20 are disposed within the accommodating space 11, each water-cooled chamber 20 including a chamber body 21 and a hatch conduit 22, a water-cooling tank 211 is formed on the chamber body 21, the water-cooling tank 211 is used to hold the battery, and the water-cooling tank 211 is connected to the hatch conduit 22; the liquid inlet pipe 30 is connected to the hatch conduit 22, and the cross-sectional area of ​​the liquid inlet pipe 30 is greater than the sum of the cross-sectional areas of all the hatch conduits 22.

[0036] The entire flow path system from the inlet end of the inlet pipe 30 to the outlet ends of each hatch conduit 22 is defined as the flow guiding system. Because the cross-sectional area of ​​the inlet pipe 30 is greater than the sum of the cross-sectional areas of all the hatch conduits 22, when the coolant in the inlet pipe 30 and the hatch conduits 22 flows at the same velocity, the inflow rate of the entire flow guiding system is greater than the outflow rate. This causes the hydraulic pressure within the flow guiding system to increase, forcing the coolant in the hatch conduits 22 to be ejected outwards at a faster speed to balance the hydraulic pressure. Under dynamic equilibrium, the flow velocity in the hatch conduits 22 stabilizes at a value higher than that in the inlet pipe 30. The specific value depends on the ratio of their cross-sectional areas and their specific shapes. Furthermore, the hydraulic pressure within the flow guiding system is greater than that under conventional configurations, meaning the hydraulic pressure of the flow guiding system is equal to the sum of the cross-sectional areas of the inlet pipe 30 and the total cross-sectional areas of all the hatch conduits 22.

[0037] In the prior art, when the liquid inlet pipe 30 supplies liquid to multiple hatch conduits 22, the hydraulic pressure of the liquid inlet pipe 30 and its connection point is smaller the further away the hatch conduit 22 is from the liquid inlet end of the liquid inlet pipe 30. This means that when one liquid inlet pipe 30 supplies liquid to multiple water cooling tanks 211 at the same time, the flow rate of the liquid supply to the hatch conduit 22 further back is smaller, and the cooling effect of the corresponding water cooling tank 211 is also worse.

[0038] The high hydraulic pressure of the flow guiding system in this embodiment ensures high hydraulic pressure even at the end of the inlet pipe 30 to support the flow rate of the end hatch conduit 22. Therefore, compared with the prior art, the flow rate of each hatch conduit 22 in this embodiment is more stable and the cooling efficiency of each water-cooled chamber 20 is more uniform.

[0039] Optionally, the housing 10 may also have a pressure relief port 13 and / or an inspection port 14. The pressure relief port 13 and the inspection port 14 are connected to the accommodating space 11. The pressure relief port 13 is used to relieve pressure when a large amount of gas is generated inside the housing 10 to prevent an explosion. The inspection port 14 is correspondingly set to the water-cooled chamber 20 to facilitate battery replacement and maintenance.

[0040] In some embodiments of this application, the immersion cooling device further includes a distribution pipe, with the inlet pipe 30 connected to a plurality of distribution pipes, each distribution pipe being connected to at least a plurality of hatch conduits 22.

[0041] From the inlet pipe 30 to the distribution pipe, and from the distribution pipe to the hatch conduit 22, the flow guiding system of this embodiment undergoes two levels of flow diversion. Within each flow diversion level, the differences between the distribution pipes and between the hatch conduits 22 are reduced, resulting in smaller flow differences in each hatch conduit 22 of the entire immersion cooling device and more similar cooling efficiencies of each water-cooled chamber 20.

[0042] Furthermore, along the height direction of the housing 10, multiple water-cooled chambers 20 are stacked to form a water-cooling group, and the multiple water-cooling groups are arranged along the length direction of the housing 10. Each water-cooling group is connected to a liquid distribution pipe 40.

[0043] Please refer to the height and length directions of the housing 10. Figure 2 As shown, the water-cooled chamber 20 is stacked to form a water-cooled group. Multiple water-cooled groups can be arranged sequentially along the length of the chamber 10, which facilitates the expansion of the immersion refrigeration unit. The modular design is also more conducive to subsequent inspection and maintenance.

[0044] Furthermore, each hatch conduit 22 is connected to the distribution pipe at the same height.

[0045] The hatch conduit 22 located at the lower end of the inlet pipe 30 has hydraulic pressure due to gravity compared to the hatch conduit 22 located at the lower end of the inlet pipe 30. This compensates for the pressure difference caused by being far from the inlet end and further homogenizes the flow rate of each hatch conduit 22.

[0046] Please see Figure 6 As shown, Figure 6 This is one method of supplying liquid to the inlet pipe 30 and the water-cooled chamber 20 of the immersion cooling device provided in this embodiment of the utility model. In some embodiments of this application, the immersion cooling device also includes a distribution pipe, the inlet pipe 30 is connected to multiple distribution pipes, and the distribution pipes are connected to the hatch conduit 22 one by one.

[0047] Each liquid distribution pipe is directly connected to the liquid inlet pipe 30, and then each liquid distribution pipe is connected to the hatch conduit 22 one by one. This makes the hydraulic pressure of each hatch conduit 22 more uniform and the cooling efficiency of each water-cooled chamber 20 more similar.

[0048] Furthermore, considering the influence of gravity on the hydraulic pressure of the flow guiding system, the water-cooled chambers 20 in this embodiment should be kept consistent in the height direction. Multiple water-cooled chambers 20 at the same height are set up as a water-cooling group. Each water-cooling group is supplied with liquid by the same liquid inlet pipe 30. Multiple water-cooling groups are stacked to realize the expansion of the immersion cooling device.

[0049] It is conceivable that, in addition to the two configurations mentioned above, the diversion system may have other connection methods. For example, please refer to [link to relevant documentation]. Figure 7 As shown, Figure 7This is a liquid supply method for the immersion cooling device inlet pipe 30 and water-cooled chamber 20 provided in this embodiment of the utility model. In an embodiment where multiple hatch conduits 22 are sequentially connected to and communicate with the inlet pipe 30, similarly, in this embodiment, each hatch conduit 22 is preferably connected to the inlet pipe 30 at the same height. The hatch conduits 22 furthest from the inlet end of the inlet pipe 30 are positioned lower, thus having hydraulic pressure due to gravity compared to the hatch conduits 22 closer to the inlet end of the inlet pipe 30. This partially compensates for the pressure difference caused by being far from the inlet end, further homogenizing the flow rate of each hatch conduit 22.

[0050] In some embodiments of this application, the cross-sections of the inlet pipe 30 and the hatch conduit 22 are both circular.

[0051] A circular cross-section has a greater advantage when the pipeline is bent, because when a circular pipe bends in any direction, its specific shape does not change with the direction of bending, which reduces the uneven flow caused by the pipeline bend.

[0052] Furthermore, the diameter of the inlet pipe 30 is D1, and the diameter of the hatch conduit 22 is D2, where D1 ≥ 3 * D2.

[0053] Theoretically, the larger the ratio of the diameter of the inlet pipe 30 to the diameter of the hatch conduit 22, the greater the hydraulic pressure of each hatch conduit 22, and the better the flow stabilization effect within a certain range. However, the increased pressure difference will increase the pressure of the flow guiding system, especially increasing the risk of the connections being blown apart. Currently, commercially available immersion cooling devices typically include six to eight water-cooled chambers 20. Therefore, in some embodiments, the ratio of the diameter of the inlet pipe 30 to the diameter of the hatch conduit 22 is limited to D1≥3*D2, which satisfies the requirement for flow uniformity without significantly increasing the pressure of the flow guiding system.

[0054] Furthermore, the diameter of the inlet pipe 30 is D1, 20mm≤D1≤25mm; the diameter of the hatch conduit 22 is D2, 4≤D2≤6mm.

[0055] by Figure 7Taking the flow guiding system shown as an example, the eight water-cooled tanks 211 shown in the figure are defined as the first tank, the second tank, the third tank, the fourth tank, the fifth tank, the sixth tank, the seventh tank, and the eighth tank. The flow rates of the hatch ducts 22 corresponding to each water-cooled tank 211 are I1, I2, I3, I4, I5, I6, I7, and I8, respectively. The average flow rate of each hatch duct 22 is defined as I0, and the flow rate deviation of the water-cooled chamber 20 is defined as (I aI0) / I0, where a takes any integer between 1 and 8. Under the operating conditions of a 22.5mm diameter inlet pipe 30, a 5mm diameter hatch conduit 22, and an inlet flow rate of 140L / min, the flow rate deviations of the first, second, third, fourth, fifth, sixth, seventh, and eighth tanks are -0.55%, -0.36%, 0.42%, 0.45%, 0.66%, 0.21%, -0.22%, and -0.71%, respectively. From the above simulation data, it can be concluded that the positive and negative deviations of the inlet flow rate are effectively controlled, achieving the expected results.

[0056] In some embodiments of this application, each water-cooled tank 211 is provided with an overflow port at its top for overflowing coolant; the end of the housing 10 away from the overflow port is provided with a drain port 12, which is connected to the accommodating space 11 and is used to discharge coolant.

[0057] In this embodiment, the coolant in each water-cooled tank 211 is discharged by overflow, which stabilizes the water flow in the water-cooled chamber 20. The coolant is evenly pushed from one end of the water-cooled tank 211 to the other end, which avoids the heated coolant from stagnating in the water-cooled tank 211 and achieves a good cooling effect.

[0058] In some embodiments of this application, the point where the hatch conduit 22 connects to the water cooling tank 211 is higher than the point where the hatch conduit 22 connects to the liquid inlet pipe 30.

[0059] The connection point between the hatch conduit 22 and the water cooling tank 211 is higher than the connection point between the hatch conduit 22 and the inlet pipe 30. This results in the hydrostatic head of the hatch conduit 22 at one end of the water cooling tank 211 being greater than that at the other end. The coolant decelerates before entering the water cooling chamber 20. On the one hand, the coolant enters the water cooling tank 211 at a lower flow rate, making the cooling effect in the water cooling chamber 20 more stable. On the other hand, this also increases the hydraulic pressure in the inlet pipe 30, compensating for the flow rate of the hatch conduit 22 at the end of the inlet pipe 30.

[0060] Please see Figure 8 , Figure 8 yes Figure 5A partial enlarged view of region C. Furthermore, the hatch conduit 22 includes a first pipe 221, a second pipe 222, a third pipe 223, and a fourth pipe 224 connected vertically in sequence. The first pipe 221 is perpendicular to the cabin body 21, and the fourth pipe 224 is perpendicular to the liquid inlet pipe 30.

[0061] Each vertical bend in the coolant flow reduces the flow rate into the water-cooling tank 211 and increases the hydraulic pressure within the inlet pipe 30. Those skilled in the art will understand that a fifth pipe, a sixth pipe, etc., can be added to this embodiment.

[0062] This utility model also provides an immersion energy storage system, which includes a battery and any of the above-mentioned immersion cooling devices, wherein the battery is thermally heated within a water-cooled chamber 20.

[0063] Because the submersible energy storage system of this embodiment adopts the submersible cooling device disclosed in the above embodiments, the submersible energy storage system of this embodiment has at least all the advantages of the submersible cooling device. It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0064] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0065] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0066] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the design concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An immersion cooling device, characterized in that, include: The box-shaped enclosure forms an internal storage space. Multiple water-cooled chambers are disposed within the accommodating space. Each water-cooled chamber includes a chamber body and a hatch conduit. A water-cooling tank is formed on the chamber body. The water-cooling tank is used to hold batteries and is connected to the hatch conduit. The inlet pipe is connected to the hatch conduit, and the cross-sectional area of ​​the inlet pipe is greater than the sum of the cross-sectional areas of all the hatch conduits.

2. The immersion cooling device according to claim 1, characterized in that, Both the inlet pipe and the hatch conduit have circular cross-sections.

3. The immersion cooling device according to claim 2, characterized in that, The diameter of the inlet pipe is D1, and the diameter of the hatch conduit is D2, where D1 ≥ 3 * D2.

4. The immersion cooling device according to claim 2, characterized in that, The diameter of the inlet pipe is D1, where 20mm ≤ D1 ≤ 25mm; The diameter of the hatch duct is D2, where 4 ≤ D2 ≤ 6 mm.

5. The immersion cooling device according to claim 1, characterized in that, The immersion cooling device also includes a liquid distribution pipe, the liquid inlet pipe is connected to a plurality of liquid distribution pipes, and each liquid distribution pipe is connected to at least a plurality of hatch conduits.

6. The immersion cooling device according to claim 5, characterized in that, Multiple water-cooled chambers are stacked along the height of the housing to form a water-cooling group, and the multiple water-cooling groups are arranged along the length of the housing. Each water-cooling group is connected to a liquid distribution pipe.

7. The immersion cooling device according to claim 1, characterized in that, The immersion cooling device also includes a liquid distribution pipe, the liquid inlet pipe is connected to multiple liquid distribution pipes, and the liquid distribution pipes are connected to the hatch conduits one by one.

8. The immersion cooling device according to any one of claims 1-7, characterized in that, Each of the water-cooled tanks is provided with an overflow outlet at the top for overflowing coolant; A drain port is provided at the end of the housing away from the overflow port. The drain port is connected to the accommodating space and is used to discharge coolant.

9. The immersion cooling device according to any one of claims 1-7, characterized in that, The point where the hatch conduit connects to the water-cooling tank is higher than the point where the hatch conduit connects to the liquid inlet pipe.

10. The immersion cooling device according to claim 9, characterized in that, The hatch conduit includes a first pipe, a second pipe, a third pipe, and a fourth pipe connected vertically in sequence. The first pipe is perpendicular to the cabin body, and the fourth pipe is perpendicular to the liquid inlet pipe.

11. An immersion energy storage system, characterized in that, include: The immersion cooling device according to any one of claims 1-10; The battery is disposed inside the water-cooled chamber.

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