Flow equalization liquid inlet structure with adaptive liquid inlet space and liquid-cooled energy storage tank

Abstract

The application relates to a flow-equalizing liquid inlet structure with an adaptive liquid inlet space and a liquid-cooled energy storage tank. The flow-equalizing liquid inlet structure is provided with an adjustable liquid inlet plug at the position of the liquid inlet end of each branch liquid inlet channel in the main liquid inlet pipeline. The first end face and the second end face of the adjustable liquid inlet plug form a first liquid inlet space and a second liquid inlet space with the inner wall of the main liquid inlet pipeline, respectively. The area difference between the first end face and the second end face causes the flow of the refrigerant to generate a pressure difference to drive the axial movement of the adjustable liquid inlet plug, to real-time adjust the size of the first liquid inlet space and the second liquid inlet space, to force the liquid inlet of the branch liquid inlet pipeline close to the main liquid inlet pipeline to decrease, and to make the excess refrigerant flow to other branch liquid inlet pipelines, to realize dynamic flow balance. Through the above dynamic flow distribution mode, an efficient and reliable heat dissipation solution is provided for the liquid-cooled energy storage tank, to help improve the safety of the energy storage system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage device cooling, in particular to a liquid flow equalizing inlet structure with adaptive liquid inlet space and a liquid-cooled energy storage box. BACKGROUND

[0002] In the existing liquid-cooled energy storage system, a large amount of heat is generated in the battery during charging and discharging, so high-efficiency heat dissipation is achieved through refrigerant circulation. However, the inlet structure of the traditional liquid-cooled energy storage device has significant defects: on the one hand, the flow distribution of the main inlet pipeline and the branch pipeline depends on fixed throttling elements, such as orifice plates, valves, etc. When the working conditions in the energy storage device change, such as battery heating power fluctuation, refrigerant flow rate adjustment, etc., the throttling elements need to be manually disassembled and replaced or the orifice ratio needs to be adjusted, resulting in high maintenance cost and response lag; on the other hand, the traditional inlet structure adopts a natural flow distribution method, which makes the branch pipeline far away from the main inlet prone to flow attenuation due to increased pipeline resistance, and the gravity effect exacerbates the flow difference between the vertically stacked modules, resulting in a large temperature difference between the batteries, affecting the heat dissipation efficiency, and even causing a thermal runaway risk in severe cases. SUMMARY

[0003] To overcome the shortcomings of the prior art, the present application provides a liquid flow equalizing inlet structure with adaptive liquid inlet space and a liquid-cooled energy storage box, which specifically adopts the following technical solutions:

[0004] The present application specifically discloses a liquid flow equalizing inlet structure with adaptive liquid inlet space, which comprises a main inlet pipeline and a plurality of spaced branch inlet pipelines. Each branch inlet pipeline is provided with an inlet end and an outlet end. The inlet end is used to communicate with the main inlet pipeline, and the outlet end is used to supply liquid to the adjacent battery gap.

[0005] An adjustable inlet plug is arranged in the main inlet pipeline corresponding to the position of each inlet end. The adjustable inlet plug is movably connected along the axial direction of the inlet end.

[0006] Each adjustable inlet plug comprises a first end face and a second end face, and the end face length of the first end face is greater than that of the second end face.

[0007] The first end face and the inner wall of the main inlet pipeline form a first inlet space, and the first inlet space communicates with the inlet end of the branch inlet pipeline. The second end face and the inner wall of the main inlet pipeline form a second inlet space. As the adjustable inlet plug moves along the axial direction of the inlet end, the space sizes of the first inlet space and the second inlet space change complementarily.

[0008] The adjustable liquid inlet plug is provided with at least one reset spring, which is used to automatically restore the adjustable liquid inlet plug to the initial position when the external force disappears or weakens.

[0009] Optionally, the adjustable liquid inlet plug comprises an integral connection of a nested part and a boss part, the first end face is located on one side of the boss part away from the nested part, the second end face is located on one side of the boss part close to the nested part, the boss part is used to provide driving force for the movement of the adjustable liquid inlet plug by using the refrigerant flow pressure of the first end face and the second end face, and the nested part is used to keep the adjustable liquid inlet plug moving along the axial direction of the nested part.

[0010] Optionally, the middle part of the adjustable liquid inlet plug is provided with a through flow channel, and the first liquid inlet space and the liquid inlet end of the branch liquid inlet pipeline are communicated through the through flow channel.

[0011] Optionally, the nested part is located in the liquid inlet end, one end of the reset spring is connected to the second end face, and the other end of the reset spring is connected to the edge position of the liquid inlet end.

[0012] Optionally, the inner wall of the main liquid inlet pipeline is provided with a flow resistance boss at the position opposite to each liquid inlet end, and the installation position of the flow resistance boss is deviated to the downstream direction of the corresponding liquid inlet end.

[0013] Optionally, the inner wall of the main liquid inlet pipeline is provided with a mounting groove at the position opposite to each liquid inlet end, and the nested part is located in the mounting groove; one end of the reset spring is connected to the second end face, and the other end of the reset spring is connected to the edge position of the mounting groove.

[0014] Optionally, the outer surface of the nested part is provided with two connecting ears, and the two connecting ears are oppositely arranged along the central axis of the nested part, and each connecting ear is connected to one reset spring.

[0015] Optionally, the first end face is arc-shaped, and the second end face is flat.

[0016] Optionally, the outer surface of the nested part is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

[0017] In addition, the application also discloses a liquid-cooled energy storage box, and the liquid-cooled energy storage box provides refrigerant to the gap between adjacent battery cells by using the uniform flow liquid inlet structure.

[0018] The technical scheme of the application has the following beneficial effects:

[0019] The flow equalization inlet structure of the present application utilizes the area difference between the first end face and the second end face of the adjustable inlet plug to drive the adjustable inlet plug to move axially by using the pressure difference generated by the refrigerant flow, and to adjust the size of the first inlet space and the second inlet space in real time. Since the branch inlet pipeline closer to the inlet of the main inlet pipeline has higher refrigerant flow rate and flow velocity, the adjustable inlet plug extends longer, thereby reducing the cross-sectional area of the first inlet space and expanding the second inlet space, forcing the branch inlet pipeline close to the main inlet pipeline to reduce the inlet, and the excess refrigerant flows to other branch inlet pipelines, realizing dynamic flow balance. Through the above dynamic flow distribution mode, an efficient and reliable heat dissipation solution is provided for the liquid-cooled energy storage tank, helping to improve the safety of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of the assembly of the flow equalization inlet structure in the liquid-cooled energy storage tank in the embodiment of the present application.

[0021] Figure 2 It is a schematic view of the structure of the flow equalization inlet structure in Embodiment 1 of the present application.

[0022] Figure 3 It is Figure 2 It is a schematic view of the installation of the adjustable inlet plug at position A and the inlet end.

[0023] Figure 4 It is a schematic view of the structure of an adjustable inlet plug in Embodiment 1 of the present application.

[0024] Figure 5 It is a schematic view of the structure of another adjustable inlet plug in Embodiment 1 of the present application.

[0025] Figure 6 It is a schematic view of the structure of the adjustable inlet plug in Embodiment 2 of the present application.

[0026] Figure 7 It is a schematic view of the structure of the adjustable inlet plug in Embodiment 3 of the present application.

[0027] Specific meanings of the reference signs in the drawings are as follows:

[0028] 1-main inlet pipeline; 11-first inlet space; 12-second inlet space; 13-mounting groove; 2-branch inlet pipeline; 21-inlet end; 22-outlet end; 3-adjustable inlet plug; 31-tubular portion; 311-first end face; 312-second end face; 32-nested portion; 321-connection lug; 33-through flow passage; 4-flow resistance boss; 5-return spring; 6-sealing ring. DETAILED DESCRIPTION

[0029] The application will be further described below with reference to the drawings. The following examples are only used to more clearly illustrate the technical solutions of the application, and cannot be used to limit the protection scope of the application. It should be pointed out that the following detailed description is exemplary and is intended to provide further illustration of the application.

[0030] In order to clearly show the spatial layout and relative position relationship of components of the technical solutions of the application, the view angle of the view presented by the drawings is taken as the reference, and the above-mentioned direction description is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the application.

[0031] It is shown in Figure 1 The embodiment of the application discloses a flow-equalizing liquid inlet structure with an adaptive liquid inlet space, which is applied in a liquid-cooled energy storage tank and can supply refrigerant to the gap between adjacent battery cells in the liquid-cooled energy storage tank to achieve heat dissipation of the battery cells.

[0032] It is shown in Figure 2 The flow-equalizing liquid inlet structure of the embodiment includes a main liquid inlet pipeline 1 and a plurality of branch liquid inlet pipelines 2 arranged at intervals, wherein the main liquid inlet pipeline 1 is used to transport refrigerant, and the pipe diameter and material thereof can be designed and selected according to the refrigerant flow, pressure and working environment in the energy storage device to ensure smooth flow of the refrigerant in the pipeline and no excessive energy loss. The branch liquid inlet pipeline 2 is used to distribute refrigerant to the gap between adjacent battery cells, and the number, pipe diameter and distribution density thereof are matched with the arrangement mode and heat dissipation demand of the battery cells, and the purpose is to ensure that each battery cell gap can be fully supplied with refrigerant. Further, each branch liquid inlet pipeline 2 is provided with a liquid inlet end 21 and a liquid outlet end 22, the liquid inlet end 21 is used to communicate with the main liquid inlet pipeline 1 and is a key interface for refrigerant to enter the branch liquid inlet pipeline 2 from the main liquid inlet pipeline 1, and the liquid outlet end 22 is used to supply liquid to the gap between adjacent battery cells, and the outlet shape and direction thereof can be optimized according to the structure of the battery cell gap to achieve efficient injection and heat exchange of the refrigerant.

[0033] Embodiment 1

[0034] The flow-equalizing liquid inlet structure in this embodiment 1 realizes adaptive adjustment of the liquid inlet space through an adjustable liquid inlet plug 3. This adjustment mode does not need external power driving and completely relies on the flow characteristics of the refrigerant itself to realize dynamic balance, and has the advantages of simple structure, rapid response and high reliability. Specifically, it is shown in Figure 2 and Figure 3 Each position corresponding to each liquid inlet end 21 in the main liquid inlet pipeline 1 is provided with an adjustable liquid inlet plug 3, and the adjustable liquid inlet plug 3 is movably connected along the axial direction of the liquid inlet end 21. This movable connection mode ensures that the plug can be flexibly moved according to the flow state of the refrigerant and timely respond to the adjustment demand of the liquid inlet space.

[0035] Detailed, such as Figure 3 As shown, each adjustable inlet plug 3 in this embodiment 1 includes an integrally connected nested portion 32 and a boss portion 31. The boss portion 31 is used to provide driving force for the movement of the adjustable inlet plug 3 by utilizing the refrigerant flow pressure on the upper and lower end faces. It should be noted that the shape design of the boss portion 31 in this embodiment is the core of realizing pressure difference drive. Its shape and size can be accurately calculated based on flow requirements, such as through modeling and simulation, to ensure that sufficient driving force can be generated to overcome the reset force and friction during the movement of the plug.

[0036] The nested part 32 is located inside the liquid inlet end 21 and is used to keep the adjustable liquid inlet plug 3 moving along its own axial direction. The nested part 32 and the liquid inlet end 21 are precisely fitted together, which not only ensures the smooth movement of the plug, but also effectively limits the radial displacement of the plug, and avoids it from deflecting during the movement and affecting the adjustment accuracy of the liquid inlet space.

[0037] More specifically, the boss portion 31 in this embodiment includes a first end face 311 and a second end face 312, wherein the first end face 311 is preferably an arc-shaped surface, and the second end face 312 is preferably a flat surface. This structure results in the end face length of the first end face 311 being greater than the end face length of the second end face 312. This difference in end face structure is a key factor in forming a pressure difference. The arc-shaped surface design can guide the refrigerant to form a faster flow rate at the first end face, while the flat surface maintains a relatively slower flow rate, thereby generating a significant pressure difference between the two end faces, which in turn pushes the plug to move.

[0038] Furthermore, to prevent refrigerant leakage from the main inlet pipe 1 through the gap between the nested part 32 and the inlet end 21, this embodiment 1 also provides a sealing groove on the outer surface of the nested part 32, and a sealing ring 6 is disposed in the sealing groove. The sealing ring 6 can ensure that the nested part 32 can move axially within the inlet end 21, and can also prevent refrigerant leakage through the gap between the two, ensuring the structural sealing performance. In this embodiment, the sealing ring 6 is preferably made of a material that is resistant to refrigerant corrosion and has good elasticity and wear resistance, such as nitrile rubber, fluororubber, etc. Its sealing performance directly affects the efficiency and safety of the entire system. If leakage occurs, it will not only lead to refrigerant loss, but also disrupt the pressure balance and affect the flow equalization effect.

[0039] Furthermore, in this embodiment 1, the first end face 311 is located on the side of the boss portion 31 away from the nested portion 32, and the second end face 312 is located on the side of the boss portion 31 closer to the nested portion 32. When the boss portion 31 is inside the main liquid inlet pipe 1, the refrigerant flows through the first end face 311 and the second end face 312 respectively. According to Bernoulli's principle, the greater the fluid velocity, the lower the pressure. Due to the area difference between the two end faces, the refrigerant velocity on the first end face 311 is faster, thereby creating a pressure difference between the first end face 311 and the second end face 312, causing the adjustable liquid inlet plug 3 to be lifted. Since the refrigerant flow rate and velocity are greater closer to the liquid inlet in the main liquid inlet pipe 1, the adjustable liquid inlet plug 3 closer to the liquid inlet in the main liquid inlet pipe 1 receives a greater upward driving force and a longer lifting length. This process is entirely based on the automatic response of the flow rate of the main liquid inlet pipe 1, requiring no manual intervention, and can be adjusted in real time according to the flow state of the refrigerant.

[0040] Combination Figure 5 As shown, in this embodiment, the first end face 311 of the adjustable liquid inlet plug 3 is an arc-shaped surface, and a flat surface is provided in the middle of the arc-shaped surface for configuring the through flow channel 33; while the second end face 312 is a flat structure. Since the end face length of the first end face 311 is longer than the end face length of the second end face 312, the refrigerant flow velocity through the first end face 311 is faster than the refrigerant flow velocity through the second end face 312. Consequently, the pressure of the refrigerant on the first end face 311 is less than the pressure on the first end face 312, thus creating a pressure difference between the first end face 311 and the second end face 312, causing the adjustable liquid inlet plug 3 to be lifted.

[0041] To improve the lifting force of the refrigerant on the adjustable inlet plug 3, this embodiment further improves the shape of the first end face 311. Combined with... Figure 6 As shown, the first end face 311 of the adjustable liquid inlet plug 3 adopts a streamlined shape, and the streamlined surface is thicker on the side closer to the liquid inlet of the main liquid inlet pipe 1 and thinner on the side closer to the liquid outlet. The boss portion 31 has an overall approximate airfoil structure. This design can enhance the force of the refrigerant on the boss portion 31, making the adjustable liquid inlet plug 3 more sensitive to changes in refrigerant flow rate, and further enhancing the liquid uniformity effect.

[0042] Furthermore, in this embodiment, the structure of the protrusion 31 on the adjustable liquid inlet plug 3 can be optimized according to parameters such as the actual refrigerant flow rate, density, and plug extension length. Specifically, in the main liquid inlet pipe 1, the refrigerant flow rate decreases as the flow rate increases (because some refrigerant flows into the branch liquid inlet pipe). Generally, the refrigerant flow rate is set to decrease approximately linearly as the flow rate increases. Therefore, the main liquid inlet pipe 1 is in the first... n The refrigerant flow rate at position 2 of the branch inlet channel v n for:

[0043] ;

[0044] In the above formula is the refrigerant flow rate at the inlet of the main liquid inlet pipe; L is the total length of the main liquid inlet pipe; is the distance of the n branch liquid inlet pipe from the inlet; is the flow rate decay coefficient, which is determined by the diameter of the main liquid inlet pipe, the number of branch liquid inlet pipes, etc., and can be calibrated through experiments or simulations.

[0045] Subsequently, based on the Bernoulli principle and mechanical equilibrium, the extension length of the adjustable liquid inlet plug 3 located at the n branch liquid inlet pipe 2 x n is determined by the refrigerant flow rate at its position v n :

[0046] ;

[0047] In the above formula is the refrigerant density; A is the effective area of the boss part, i.e., the area difference between the first end face and the second end face; k 1 is the end face flow rate coefficient of the first end face; k 2 is the end face flow rate coefficient of the second end face; f is the friction force of the adjustable liquid inlet plug movement; k is the spring constant of the return spring.

[0048] where the critical flow rate is:

[0049] ;

[0050] Based on the above formula, the extension length of the adjustable liquid inlet plug with different boss part shapes at different branch liquid inlet pipe positions can be analyzed and obtained. In combination with the actual extension requirements, the boss part shape is optimized to adapt to the requirements of different extension lengths. At the same time, based on the structure of the boss part with different shapes, the minimum flow rate requirement of the refrigerant in the main liquid inlet pipe under this structure can be analyzed and obtained, so as to control the refrigerant flow rate of the main liquid inlet pipe and further stabilize the liquid equalization control.

[0051] Further, as Figure 3As shown, the first end face 311 in the first embodiment 1 forms a first liquid inlet space 11 with the inner wall of the main liquid inlet pipeline 1, the first liquid inlet space 11 communicates with the liquid inlet end 21 of the branch liquid inlet pipeline 2, and the first liquid inlet space 11 is the main channel for the refrigerant to enter the branch liquid inlet pipeline 2; the second end face 312 forms a second liquid inlet space 12 with the inner wall of the main liquid inlet pipeline 1, which mainly provides a bypass channel for the refrigerant to realize redistribution of the refrigerant in the main liquid inlet pipeline 1 to the subsequent branch liquid inlet pipeline 2; as the adjustable liquid inlet plug 3 extends along the axial direction of the liquid inlet end 21 for a longer distance, the sizes of the first liquid inlet space 11 and the second liquid inlet space 12 complementarily change, that is, the smaller the first liquid inlet space 11, the larger the second liquid inlet space 12, and vice versa; the complementary change characteristic of the liquid inlet space in the embodiment is the key mechanism to realize flow equalization: the closer to the liquid inlet of the main liquid inlet pipeline 1, the greater the refrigerant flow and flow rate, which makes the adjustable liquid inlet plug 3 closer to the liquid inlet of the main liquid inlet pipeline 1 extend for a longer distance, and then the first liquid inlet space 11 decreases and the second liquid inlet space 12 increases, which makes more refrigerant flow to the adjustable liquid inlet plug 3 in the downstream direction through the second liquid inlet space 12, avoiding the problem of excessive flow of the upstream branch liquid inlet pipeline and resulting in insufficient refrigerant in the downstream, thereby reducing the flow of the first liquid inlet space 11 and reducing the amount of refrigerant entering the branch liquid inlet pipeline 2. Similarly, as the liquid inlet direction of the main liquid inlet pipeline 1, the adjustable liquid inlet plug 3 located at the downstream position has a smaller driving force and extends for a shorter distance, and the corresponding first liquid inlet space 11 is larger, so that the amount of refrigerant entering the corresponding branch liquid inlet pipeline 2 increases, thereby dynamically balancing the refrigerant flow of each branch liquid inlet pipeline 2. The above dynamic balancing mechanism can effectively compensate for the pressure and flow loss of the refrigerant during flow in the main liquid inlet pipeline 1, and ensure that each branch liquid inlet pipeline 2 can obtain relatively stable and balanced refrigerant flow regardless of whether it is located upstream or downstream of the main liquid inlet pipeline 1.

[0052] In addition, at least one reset spring 5 is arranged on the adjustable liquid inlet plug 3 in the first embodiment 1, and the reset spring 5 is used to automatically restore the adjustable liquid inlet plug 3 to the initial position when the external force disappears or weakens. It should be noted that the elastic coefficient and pre-tightening force of the reset spring 5 in the embodiment need to be accurately calculated to ensure that it can be smoothly compressed when the refrigerant flows, and can provide sufficient elastic force to reset the plug when the refrigerant stops flowing or the flow decreases.

[0053] The reset spring 5 described in this embodiment 1 is provided with two, and one end of the reset spring 5 is directly connected to the second end face 312 of the boss part 31, and the other end is connected to the edge position of the liquid inlet end 21, which can make the spring force uniformly act on the plug, and ensure the smooth movement of the plug during reset. When the refrigerant in the main liquid inlet pipeline 1 stops flowing, the adjustable liquid inlet plug 3 inside will return to the original position to ensure the stability of the subsequent uniform flow, and avoid affecting the uniform flow effect during the next start due to abnormal plug position.

[0054] It should be noted that, in order to ensure that the main liquid inlet pipeline 1 is stable and flows into the branch liquid inlet pipeline 2, the embodiment 1 is provided with a through flow channel 33 in the middle of the adjustable liquid inlet plug 3, which connects the first liquid inlet space 11 and the liquid inlet end 21 of the branch liquid inlet pipeline 2. It should be noted that the diameter and shape of the through flow channel 33 in this embodiment need to consider the flow resistance and flow demand of the refrigerant, to ensure that when the first liquid inlet space 11 changes, the refrigerant can enter the branch liquid inlet pipeline 2 stably and smoothly, and avoid flow fluctuation or flow interruption.

[0055] Further, as shown in Figure 2 The inner wall of the main liquid inlet pipeline 1 in this embodiment is provided with a flow resistance boss 4 on the opposite side of each liquid inlet end 21, and the installation position of the flow resistance boss 4 is biased towards the downstream direction of the corresponding liquid inlet end 21, that is, the side of each liquid inlet end 21 away from the liquid inlet of the main liquid inlet pipeline 1. The setting of the flow resistance boss 4 can change the flow direction and flow speed distribution of the refrigerant in the main liquid inlet pipeline 1, and when the refrigerant flows through the flow resistance boss 4, it will be hindered to a certain extent, thereby forcing the refrigerant to flow stably to the first liquid inlet space 11, ensuring the stability of the refrigerant entering the branch liquid inlet pipeline 2. And with the liquid inlet direction of the main liquid inlet pipeline 1, the height of the flow resistance boss 4 is greater, this design is to compensate for the decay of downstream refrigerant pressure and flow rate, by gradually increasing the flow resistance effect, this structure can guide the flow of refrigerant, to ensure that the adjustable liquid inlet plug 3 downstream can obtain sufficient refrigerant flow, further enhance the uniform flow effect.

[0056] Embodiment 2:

[0057] In addition, this embodiment 2 also discloses a uniform flow inlet structure with an adaptive liquid inlet space, which is different from embodiment 1, as shown in Figure 6As shown, two connecting ears 321 are arranged on the outer surface of the nesting portion 32 of the adjustable inlet plug 3 in this embodiment 2, and the two connecting ears 321 are arranged opposite to each other along the central axis of the nesting portion 32, and each connecting ear 321 is connected to a reset spring 5. Compared with the structure of embodiment 1, the main difference of the uniform flow inlet structure in this embodiment 2 is the connection mode of the reset spring 5. The connection mode of the reset spring 5 in embodiment 2 adopts a symmetrical design, which can make the elastic force more uniformly act on both sides of the adjustable inlet plug 3, avoid the inclination of the plug during the axial movement due to uneven force, and further improve the stability and precision of the inlet space adjustment. The symmetrical spring connection mode described above can effectively balance the lateral force that the plug may be subjected to during movement, ensure that the plug always moves in the axial direction, and thus ensure the adjustment precision of the first inlet space 11 and the second inlet space 12, so that the refrigerant flow of each branch inlet pipeline 2 is more balanced. At the same time, the symmetrical design is also conducive to reducing the wear between the plug and the inlet end, prolonging the service life of the structure, and reducing the maintenance cost. In actual application, this structure has significant advantages for liquid-cooled energy storage systems with high uniform flow precision and long-term stable operation requirements.

[0058] Embodiment 3

[0059] In addition, this embodiment 3 also discloses a uniform flow inlet structure with an adaptive inlet space, which is different from embodiment 1 in that, as shown, Figure 7 In this embodiment 3, an installation groove 13 is arranged on the inner wall of the main inlet pipeline 1 at a position opposite to each of the inlet ends 21, and the nesting portion 32 of the adjustable inlet plug 3 is located in the installation groove 13. Correspondingly, one end of the reset spring 5 is connected to the second end face 312, and the other end of the reset spring 5 is connected to the edge position of the installation groove 13.

[0060] Based on the above structure, the first liquid inlet space 11 in Embodiment 3 is closer to the liquid inlet end 21 of the branch liquid inlet pipeline 2. This structure design makes the path of the refrigerant from the first liquid inlet space 11 to the branch pipeline shorter and the flow resistance smaller, which can improve the delivery efficiency of the refrigerant and reduce energy loss. At the same time, the adjustable liquid inlet plug 3 in Embodiment 3 does not have a through flow channel in the middle, and the refrigerant directly enters the branch liquid inlet pipeline 2 through the first liquid inlet space 11, which simplifies the structure of the plug and reduces the processing difficulty and cost. When the refrigerant flows in the main liquid inlet pipeline 1, the higher the flow rate of the refrigerant, the greater the driving force of the adjustable liquid inlet plug 3, and the longer the extension distance, which results in less refrigerant entering the first liquid inlet space 11. As the flow rate and flow of the refrigerant decrease in the downstream direction of the main liquid inlet pipeline 1, the extension distance of the adjustable liquid inlet plug 3 shortens, and the refrigerant entering the first liquid inlet space 11 gradually increases, so the flow of the refrigerant flowing into the corresponding branch liquid inlet pipeline 2 increases, and finally the refrigerant is balanced. This structure eliminates the through flow channel, reduces the structural complexity, improves the structural reliability, and the shorter refrigerant flow path is also beneficial to improve the response speed of the system, making the flow regulation more rapid and timely, and is suitable for application scenarios with high requirements for structure simplification and reliability.

[0061] The above only describes the preferred embodiments of the present application. It should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A uniform flow inlet structure with an adaptive inlet space, characterized in that, The uniform flow inlet structure comprises a main inlet pipeline and a plurality of branch inlet pipelines arranged at intervals, each branch inlet pipeline is provided with an inlet end and an outlet end, the inlet end is used for communicating with the main inlet pipeline, and the outlet end is used for supplying liquid to the gap between adjacent battery cells, The position corresponding to each inlet end in the main inlet pipeline is provided with an adjustable inlet plug, and the adjustable inlet plug is movably connected along the axial direction of the inlet end; Each adjustable inlet plug comprises a first end face and a second end face, and the end face length of the first end face is greater than that of the second end face; The adjustable inlet plug comprises an integrated nesting part and a boss part, the first end face is located on one side of the boss part away from the nesting part, the second end face is located on one side of the boss part close to the nesting part, the boss part is used to provide driving force for the movement of the adjustable inlet plug by using the refrigerant flow pressure of the first end face and the second end face, and the nesting part is used to keep the adjustable inlet plug moving along the axial direction of the nesting part; The first end face and the inner wall of the main inlet pipeline form a first inlet space, and the first inlet space communicates with the inlet end of the branch inlet pipeline; the second end face and the inner wall of the main inlet pipeline form a second inlet space; as the adjustable inlet plug moves along the axial direction of the inlet end, the space sizes of the first inlet space and the second inlet space change complementarily; The adjustable inlet plug is provided with at least one reset spring, and the reset spring is used to automatically restore the adjustable inlet plug to the initial position when the external force disappears or weakens.

2. The flow-equalizing inlet structure of claim 1, wherein The middle part of the adjustable inlet plug is provided with a through flow channel, and the first inlet space and the inlet end of the branch inlet pipeline are communicated through the through flow channel.

3. The flow-equalizing inlet structure of claim 2, wherein, The nesting part is located in the inlet end, one end of the reset spring is connected to the second end face, and the other end of the reset spring is connected to the edge position of the inlet end.

4. The flow-equalizing inlet structure of claim 3, wherein, The inner wall of the main inlet pipeline is provided with a flow resistance boss at the position opposite to each inlet end, and the installation position of the flow resistance boss is deviated to the downstream direction of the corresponding inlet end.

5. The flow-equalizing inlet structure of claim 1, wherein The inner wall of the main inlet pipeline is provided with a mounting groove at the position opposite to each inlet end, and the nesting part is located in the mounting groove; one end of the reset spring is connected to the second end face, and the other end of the reset spring is connected to the edge position of the mounting groove.

6. The flow-equalizing inlet structure of claim 1, wherein The outer side surface of the nesting part is provided with two connecting ears, and the two connecting ears are oppositely arranged along the central axis of the nesting part, and each connecting ear is connected with one reset spring.

7. The flow-equalizing inlet structure of claim 1, wherein The first end face is an arc surface, and the second end face is a plane.

8. The flow-equalizing inlet structure of claim 3 or 5, wherein, The outer surface of the nesting part is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

9. A liquid-cooled energy storage tank, characterized by, The liquid-cooled energy storage tank uses the uniform flow inlet structure according to any one of claims 1-8 to supply refrigerant to the gap between adjacent battery cells.

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