A thermal management member for a battery pack

Abstract

The utility model discloses a kind of thermal management components for battery pack, including battery box, box cover and battery body, battery body is fixedly installed in battery box, the top of battery body is fixed with liquid cooling plate, first radiating structure is equipped in liquid cooling plate, for destroying liquid cooling plate internal thermal boundary layer and enhancing its longitudinal heat conduction;Liquid cooling pipe is equipped with Venturi tube on at least one pipe section, and chatter valve is equipped in the throat of Venturi tube.The utility model improves the heat dissipation adaptive capacity of liquid cooling system, specifically is by setting the chatter valve consisting of torsional spring and leaf spring in liquid cooling pipe Venturi tube, so that heat dissipation intensity can be automatically adjusted according to thermal load, efficiently run at low load, and explosively enhance at high load, thereby solve the problem that traditional fixed flow passage is hysteresis in heat dissipation response under variable working condition, efficiency fixed.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack heat dissipation technology, and in particular relates to a thermal management component for battery packs. Background Technology

[0002] As the core component of electric vehicles and energy storage systems, the thermal management of power batteries during operation is crucial. In existing technologies, a liquid cooling plate is often installed above the battery pack for heat dissipation. The liquid cooling plate is embedded with liquid cooling pipes, and the heat generated by the battery is carried away by the circulation of coolant. Although this structure provides a certain cooling capacity, it still has obvious shortcomings.

[0003] First, traditional liquid cooling plates typically have smooth cavities or simple fixed fins, resulting in limited heat exchange efficiency between the plate and the coolant. This fails to effectively break the thermal boundary layer tightly adhering to the plate wall, leading to a bottleneck in overall heat dissipation performance. Second, the coolant inside the liquid cooling pipe tends to form stable laminar flow in conventional channels, resulting in low heat exchange efficiency. Especially when the battery load changes abruptly and heat generation surges, the fixed heat dissipation structure cannot adaptively increase the heat dissipation intensity, which may lead to localized overheating of the battery, affecting battery life and safety. To address these issues, a thermal management component for battery packs is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a thermal management component for a battery pack, thereby solving the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a thermal management component for a battery pack, comprising a battery box, a box cover, and a battery body. The battery body is fixedly installed inside the battery box, and a liquid cooling plate is fixedly installed above the battery body. The liquid cooling plate has a first heat dissipation structure for breaking the internal thermal boundary layer of the liquid cooling plate and enhancing its longitudinal thermal conductivity. The liquid cooling plate has a built-in liquid cooling pipe for cooling fluid circulation. At least one section of the liquid cooling pipe is equipped with a Venturi tube, and a flutter valve is installed in the throat of the Venturi tube. The first heat dissipation structure enhances the thermal conductivity of the liquid cooling plate, enabling heat to be transferred to the liquid cooling pipe more efficiently.

[0006] Preferably, the flutter valve includes a mounting bracket, a connecting shaft, a spring, and a torsion spring. The mounting bracket is fixedly disposed on the inner wall of the venturi tube, the connecting shaft is fixedly installed inside the mounting bracket, the spring is rotatably disposed on the circumferential side of the connecting shaft, and the torsion spring is sleeved on the circumferential side of the connecting shaft, with its two ends fixedly connected to the spring and the mounting bracket, respectively.

[0007] Preferably, the inner wall of the venturi tube expansion section is provided with helical ribs, and the peripheral side of the helical ribs is provided with grooves.

[0008] Preferably, the first heat dissipation structure includes a baffle wing and a baffle column, both of which are fixedly installed on the bottom surface of the inner wall of the liquid cooling plate, and the baffle column is disposed in the space between the multiple baffle wing ...

[0009] Preferably, the turbulence wing is a vertically arranged thin plate, and its orientation is perpendicular to the orientation of the liquid cooling pipe.

[0010] Preferably, the spoiler column is a cylinder and is staggered within the area separated by the spoiler wing.

[0011] Preferably, the upper and lower surfaces of the liquid cooling plate are provided with second heat dissipation holes, one side of the battery box is provided with a first heat dissipation hole, and one side of the battery box is fixedly provided with a handle 3.

[0012] This utility model has the following beneficial effects: 1. This utility model improves the heat dissipation adaptive capability of the liquid cooling system. Specifically, it is achieved by installing a flutter valve composed of a torsion spring and a reed inside the Venturi tube of the liquid cooling pipe. When the coolant flow rate increases with the increase of battery heat load, the high-speed fluid flowing through the throat of the Venturi drives the reed to overcome the preload of the torsion spring and generate high-frequency flutter, which violently disturbs the fluid and generates large-scale turbulence. This allows the heat dissipation intensity to be automatically adjusted according to the heat load, operating efficiently at low loads and explosively enhanced at high loads. This solves the problem of slow heat dissipation response and fixed efficiency of traditional fixed flow channels under varying operating conditions. 2. This utility model improves the thermal conductivity of the liquid cooling plate and achieves temperature uniformity. Specifically, it is achieved by setting up turbulence wings and turbulence columns. The turbulence wings serve as the main heat conduction path, quickly guiding the battery heat upwards. The turbulence columns greatly increase the heat exchange area and generate eddies around them, effectively breaking the thermal boundary layer that is close to the bottom surface of the liquid cooling plate. This solves the problem of insufficient longitudinal thermal conductivity and easy formation of local overheating in traditional liquid cooling plates.

[0013] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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 these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the liquid cooling plate of this utility model; Figure 5 This is a cross-sectional view of the local liquid cooling pipe of this utility model; Figure 6 for Figure 5 A magnified schematic diagram of the partial structure at point A in the middle; Figure 7 This is a schematic diagram of the spiral rib structure of this utility model; Figure 8 This is a schematic diagram of the flutter valve of this utility model.

[0016] The components represented by each number in the attached diagram are listed below: 1. Battery box; 2. Box cover; 3. Handle; 4. First heat dissipation hole; 5. Liquid cooling pipe; 6. Battery body; 7. Liquid cooling plate; 8. Second heat dissipation hole; 9. Torsion spring; 10. Spoiler wing; 11. Spoiler column; 12. Helical rib; 13. Venturi tube; 14. Mounting bracket; 15. Spring; 16. Groove; 17. Connecting shaft. Detailed Implementation

[0017] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Please see Figures 1-8 As shown, this utility model is a thermal management component for a battery pack, including a battery box 1, a box cover 2 and a battery body 6. The battery body 6 is fixedly installed inside the battery box 1. A liquid cooling plate 7 is fixedly installed on the top of the battery body 6. For easy handling, a handle 3 is fixedly installed on one side of the battery box 1. To assist in overall ventilation and heat dissipation, a first heat dissipation hole 4 is opened on one side of the battery box 1.

[0020] A liquid cooling plate 7 is fixedly installed on the top of the battery body 6. The liquid cooling plate 7 not only has liquid cooling pipes 5 for cooling fluid circulation, but also integrates two sets of enhanced heat dissipation structures. The liquid cooling pipes 5 are arranged in a serpentine manner inside the liquid cooling plate 7, with both ends passing through the cover 2 and extending to the outside. One end serves as a water inlet and is connected to an external coolant supply pump (not shown in the figure); the other end serves as a water outlet and is connected to an external coolant return pump (not shown in the figure). Thus, under the drive of the external pump set, the coolant can form a continuous closed-loop flow in the liquid cooling pipes 5, which constitutes the basis for active heat dissipation.

[0021] The first set of enhanced heat dissipation structure is located inside the liquid cooling plate 7. Specifically, a first heat dissipation structure is fixedly installed on the bottom surface of the inner wall of the liquid cooling plate 7. The first heat dissipation structure is composed of multiple baffles 10 and multiple baffles 11. The baffles 10 are vertically arranged thin plates, and their direction is perpendicular to the serpentine direction of the liquid cooling pipe 5, thereby dividing the lower surface of the liquid cooling plate 7 into multiple parallel regions. The baffles 11 are cylinders and are arranged in a staggered array in each region separated by the baffles 10.

[0022] When the battery body 6 is working, the heat it generates is conducted to the bottom of the liquid cooling plate 7. The baffle 10, as an efficient heat conduction path, can quickly conduct heat longitudinally (i.e., in the direction perpendicular to the liquid cooling plate 7) to the interior and top of the liquid cooling plate 7. At the same time, the baffle column 11 increases the heat exchange area inside the liquid cooling plate 7. On the other hand, its cylindrical shape and staggered layout can effectively disturb the coolant flow field inside the plate and destroy the thermal boundary layer that is closely attached to the plate wall and has a significant heat insulation effect. The synergistic effect of the baffle 10 and the baffle column 11 greatly enhances the thermal conductivity and temperature uniformity of the liquid cooling plate 7 itself, so that heat can be transferred to the internal liquid cooling pipe 5 more quickly and evenly.

[0023] The second enhanced heat dissipation structure is located inside the liquid cooling pipe 5. Specifically, a venturi tube 13 is provided on at least one section of the liquid cooling pipe 5. A passive dynamic turbulence mechanism, a flutter valve, is provided in the throat of the venturi tube 13. The flutter valve consists of a mounting bracket 14, a connecting shaft 17, a spring 15, and a torsion spring 9. The mounting bracket 14 is fixedly installed on the inner wall of the throat of the venturi tube 13. The connecting shaft 17 is fixedly installed in the mounting bracket 14. The spring 15 is rotatably sleeved on the circumferential side of the connecting shaft 17 through the shaft hole on it. The torsion spring 9 is also sleeved on the connecting shaft 17, and its two ends are fixedly connected to the spring 15 and the mounting bracket 14 respectively, providing a preload force for the spring 15 to tend to close or the initial position.

[0024] To further enhance heat transfer, spiral ribs 12 are fixedly installed on the inner wall of the expansion section of the Venturi tube 13 to guide the fluid to rotate. In addition, pits 16 are regularly formed in the valleys between the spiral ribs 12. These pits 16 can generate stable micro vortices in the flow field, further assisting in breaking the boundary layer.

[0025] First, the liquid cooling plate 7, whose heat conduction is enhanced by the first heat dissipation structure, efficiently transfers a large amount of heat to the coolant in the liquid cooling pipe 5, causing the coolant temperature to rise. The viscosity of the heated coolant changes and the flow rate may also be accelerated due to the system's circulation drive. When the coolant flows through the throat of the venturi tube 13, the cross-sectional area decreases, causing the flow rate to increase sharply and the static pressure to decrease. This high-speed fluid generates a strong impact force on the spring 15. When it is sufficient to overcome the preload of the torsion spring 9, it drives the spring 15 to open around the connecting shaft 17 and enter a high-frequency flutter state. This flutter will create violent and unstable turbulence in the center of the flow channel, strongly mixing the cooler fluid in the center of the flow channel with the superheated fluid near the pipe wall, thereby achieving an explosive increase in heat exchange efficiency at the most critical moment (i.e., when the system's heat load is the highest). The entire process is driven entirely by the system's own thermal state, achieving adaptive adjustment of heat dissipation capacity.

[0026] Working Principle: The battery body 6 generates heat during operation. This heat is first conducted to the liquid cooling plate 7, where the first heat dissipation structure activates. The turbulence wing 10 serves as the main heat conduction path, rapidly guiding the heat upwards. The turbulence column 11 increases the heat exchange area and agitates the fluid within the plate, disrupting the thermal boundary layer and quickly and evenly dissipating the heat to the coolant circulating in the liquid cooling pipe 5. The coolant absorbs heat, its temperature rises, and it flows through the liquid cooling pipe 5 under the drive of an external pump. When it passes the throat of the venturi tube 13, the flow velocity increases sharply, driving the internal flutter valve to activate. Specifically, the high-speed fluid impacts the reed 15, causing it to overcome the preload of the torsion spring 9 and generate high-frequency flutter around the connecting shaft 17. The flutter of the reed 15 creates intense turbulence in the center of the flow channel, forcibly mixing the core low-temperature fluid with the high-temperature fluid on the wall, thus achieving adaptive adjustment. Finally, the heated coolant is pumped to an external radiator for cooling and then pumped back into the liquid cooling pipe 5, completing the continuous thermal cycle.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A thermal management component for a battery pack, comprising a battery case (1), a case cover (2), and a battery body (6), wherein the battery body (6) is fixedly installed inside the battery case (1), and a liquid cooling plate (7) is fixedly disposed above the battery body (6), characterized in that: The liquid cooling plate (7) is provided with a first heat dissipation structure, which is used to break the internal thermal boundary layer of the liquid cooling plate and enhance its longitudinal heat conduction. The liquid cooling plate (7) is provided with a liquid cooling pipe (5) for cooling liquid circulation. At least one section of the liquid cooling pipe (5) is provided with a Venturi tube (13). A flutter valve is provided in the throat of the Venturi tube (13). The first heat dissipation structure enhances the heat conduction of the liquid cooling plate (7) so that heat is transferred to the liquid cooling pipe (5) more efficiently.

2. A thermal management component for a battery pack according to claim 1, characterized in that, The flutter valve includes a mounting bracket (14), a connecting shaft (17), a spring (15), and a torsion spring (9). The mounting bracket (14) is fixedly disposed on the inner wall of the venturi tube (13). The connecting shaft (17) is fixedly installed inside the mounting bracket (14). The spring (15) is rotatably disposed on the circumferential side of the connecting shaft (17). The torsion spring (9) is sleeved on the circumferential side of the connecting shaft (17), and its two ends are fixedly connected to the spring (15) and the mounting bracket (14) respectively.

3. A thermal management component for a battery pack according to claim 2, characterized in that, The inner wall of the expansion section of the Venturi tube (13) is provided with a spiral rib (12), and the peripheral side of the spiral rib (12) is provided with a groove (16).

4. A thermal management component for a battery pack according to claim 2, characterized in that, The first heat dissipation structure includes a turbulence wing (10) and a turbulence column (11). The turbulence wing (10) and the turbulence column (11) are both fixedly installed on the bottom surface of the inner wall of the liquid cooling plate (7), and the turbulence column (11) is arranged in the space between multiple turbulence wings (10).

5. A thermal management component for a battery pack according to claim 4, characterized in that, The spoiler (10) is a vertically arranged thin plate, and its orientation is perpendicular to that of the liquid cooling pipe (5).

6. A thermal management component for a battery pack according to claim 4, characterized in that, The spoiler column (11) is a cylinder and is staggered within the area separated by the spoiler wing (10).

7. A thermal management component for a battery pack according to claim 1, characterized in that, The liquid cooling plate (7) has second heat dissipation holes (8) on both the upper and lower surfaces, and the battery box (1) has a first heat dissipation hole (4) on one side. The battery box (1) has a handle (3) fixedly installed on one side.

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