Battery working medium direct cooling plate with flow guide pulsation impact reinforced condensation structure flow channel

Abstract

The utility model discloses a battery working medium direct cooling plate with a flow guide pulsation impact reinforced condensation structure flow channel. A plurality of heat exchange flow channels are arranged in the direct cooling plate; and turbulent flow structures are arranged on the inner wall surfaces of the heat exchange runners in a convex / concave manner. The direct cooling plate comprises a bottom plate and a face plate, a groove used for forming a flow channel is formed in the bottom plate, and an opening in the upper end of the groove is sealed through the face plate to form a heat exchange flow channel. A flow guide pulsation structure is introduced into the working medium direct cooling plate, so that a working medium can impact a condensation surface in contact with the position of a lithium ion battery in a pulsation impact mode, a steam film is continuously broken, and the condensation effect is enhanced. By means of the pulsation impact design, the heat dissipation efficiency of the condensation face is effectively improved, and meanwhile the local overheating risk caused by uneven condensation can be reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the field of battery temperature control, in particular to a battery working medium direct cooling plate with a flow guide pulsation impact reinforced condensation structure flow channel. BACKGROUND

[0002] With the rapid development of the new energy automobile industry, especially the rise of electric vehicles and the promotion of the "double carbon" strategy, electric vehicles have become an important trend in the future automobile industry. The thermal management system of electric vehicles plays a crucial role in their performance and safety. Most electric vehicles on the market currently use water cooling systems for battery heat dissipation management. This water cooling heat dissipation system circulates cooling liquid around the battery to conduct the heat generated by the battery to the outside, ensuring that the working temperature of the battery remains within a reasonable range. However, with the continuous advancement of battery charging technology, especially in fast charging mode or abnormal battery conditions, the heat generated by the battery increases rapidly, making the water cooling heat dissipation effect limited and difficult to meet the heat dissipation needs of the battery in high heat conditions.

[0003] During the battery fast charging process, the internal chemical reaction speed of the battery increases, and the heat generated increases sharply. If the heat cannot be effectively dissipated, it may cause the battery to lose control of the heat, leading to serious safety problems. Although the traditional water cooling heat dissipation method can effectively control the temperature of the battery to a certain extent, its heat dissipation capacity is limited by the heat capacity of the cooling liquid, and when facing local overheating problems, the water cooling system often cannot respond quickly. In addition, the water cooling system usually requires complex pumps, valves and cooling pipelines, increasing the complexity and manufacturing cost of the system, and being relatively large in size, which is not conducive to the lightweight design requirements of electric vehicles.

[0004] In order to improve the heat dissipation efficiency of the thermal management system of electric vehicles, working medium direct cooling technology has gradually attracted attention. Compared with water cooling, working medium direct cooling has higher heat dissipation efficiency, and the direct evaporation and condensation process of the working medium can quickly take away the heat generated by the battery, thereby better controlling the temperature of the battery. However, the existing working medium direct cooling technology also faces some challenges in actual application. When the lithium ion battery is in an abnormal condition and the local temperature is too high, the working medium is prone to form a vapor film on the condensation surface in the flow channel, resulting in a decrease in condensation efficiency. The formation of the vapor film hinders the further condensation of the working medium, significantly reducing the local heat dissipation effect and increasing the risk of thermal runaway. Therefore, how to enhance the flowability of the working medium in the flow channel and strengthen its condensation function has become the key to solving the problems of working medium direct cooling technology. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to at least overcome one of the deficiencies in the prior art, and provide a battery working medium direct cooling plate with a flow guide pulsation impact reinforced condensation structure flow channel. The flow guide pulsation structure is introduced into the working medium direct cooling plate, so that the working medium can impact the condensing surface in contact with the lithium ion battery position in a pulsation impact manner, continuously break the vapor film, and strengthen the condensation effect. This pulsation impact design not only effectively improves the heat dissipation efficiency of the condensing surface, but also reduces the risk of local overheating caused by uneven condensation.

[0006] To achieve the above-mentioned purpose, the present application discloses a battery working medium direct cooling plate with a flow guide pulsation impact reinforced condensation structure flow channel, which is provided with a plurality of heat exchange flow channels.

[0007] In some embodiments, the direct cooling plate includes a bottom plate and a panel, the bottom plate is provided with a groove for forming a flow channel, and the panel seals the upper end opening of the groove to form a heat exchange flow channel.

[0008] Further, the flow disturbance structure is arranged on the inner wall surface of the groove of the bottom plate.

[0009] Further, the flow disturbance structure is arranged on the bottom surface of the panel.

[0010] In some embodiments, the heat exchange flow channel is provided with a plurality of flow disturbance structures arranged symmetrically along the axis of the heat exchange flow channel.

[0011] In some embodiments, the heat exchange flow channel is provided with a plurality of flow disturbance structures arranged staggered along the axis of the heat exchange flow channel.

[0012] In some embodiments, one side of the heat exchange flow channel is provided with a plurality of flow disturbance structures arranged along the axis of the heat exchange flow channel.

[0013] In some embodiments, the flow disturbance structure is a protruding structure, which includes a first inclined surface consistent with the flow direction of the fluid in the heat exchange flow channel, and the first inclined surface extends to the inner wall surface of the heat exchange flow channel through a second inclined surface or an arc-shaped transition surface, and is connected with the inner wall surface of the flow channel, so that the whole protruding structure forms one of a barb-shaped, serrated or tear-drop-shaped structure.

[0014] In some embodiments, the inner wall surface of the heat exchange flow channel is provided with a plurality of fine grooves for capillary transport.

[0015] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0016] 1. Improve condensation efficiency: the flow guide pulsation impact structure effectively breaks the vapor film on the condensing surface, enhances the condensation effect, and significantly improves the heat dissipation performance, especially in high heat state.

[0017] 2. Reduce the risk of local overheating: The pulsating impact design promotes more uniform condensation, avoiding local temperature overloading and reducing the risk of thermal runaway of the battery under fast charging or abnormal conditions.

[0018] 3. Capillary transport enhanced wall cooling: By setting capillary transport grooves on the inner wall of the heat exchange flow channel, uniform transport of the working medium along the wall is achieved, enhancing the cooling effect of the fluid on the wall and further optimizing the heat dissipation efficiency.

[0019] 4. Improve overall heat dissipation performance: The flow channel inside the flow channel promotes heat exchange between the working medium and the heat exchange surface, accelerates the condensation process, and improves the overall heat dissipation capacity.

[0020] The above listed benefits are not exhaustive of all advantages. Other potential benefits and detailed technical implementations will be further disclosed in the embodiments or other description sections of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The specific embodiments will be better understood after reading the detailed description of the present disclosure in conjunction with the accompanying drawings, in which the positions, sizes and ranges of the structures shown in the drawings are sometimes not representative of the actual positions, sizes and ranges. In the drawings:

[0022] Figure 1 Structure schematic diagram of an embodiment of the present application.

[0023] Figure 2 Structure schematic diagram of a local flow channel in an embodiment of the present application.

[0024] Figure 3 Structure schematic diagram of the arrangement of the protruding structure in the heat exchange flow channel of an embodiment of the present application.

[0025] Figure 4 Protruding structure schematic diagram in an embodiment of the present application.

[0026] Figure 5 Protruding structure schematic diagram in an embodiment of the present application.

[0027] Figure 6 Protruding structure schematic diagram in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The present disclosure will be described with reference to the attached drawings, which show several embodiments of the present disclosure. It should be understood, however, that the present disclosure can be presented in many different forms and are not limited to the embodiments described below; indeed, the embodiments described below are intended to provide a full and enabling disclosure of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in a variety of ways, thereby providing more additional embodiments.

[0029] It should be understood that, in all the drawings, the same reference numerals indicate the same elements. In the drawings, the dimensions of certain features can be distorted for the sake of clarity.

[0030] It should be understood that the language used in the specification is only used to describe specific embodiments and is not intended to limit the present disclosure. Unless otherwise defined, all terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art. For the sake of brevity and / or clarity, techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the disclosure.

[0031] The singular forms "a", "said" and "the" used in the specification are intended to include plural forms unless clearly indicated otherwise. The language "comprise", "comprises" and "comprising" used in the specification means the presence of the stated features, but does not exclude the presence of one or more other features. The language "and / or" used in the specification includes any and all combinations of one or more of the associated listed items. Embodiments

[0032] As shown in Figure 1 , 2 , the present embodiment discloses an exemplary structure of a high-efficiency battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure.

[0033] In the present embodiment, a heat exchange flow channel 1 is provided in the direct cooling plate, which can be designed in various forms to meet different heat exchange requirements.

[0034] The heat exchange flow channel 1 can be designed as a continuous single flow channel, in which case the working medium flows inside the direct cooling plate according to a predetermined path, ensuring that the contact time and contact area of the working medium with the direct cooling plate are maximized, thereby improving the heat exchange efficiency.

[0035] In addition, the heat exchange flow channel 1 can also be formed by multiple independent heat exchange flow channels 1 in parallel or in series. In the parallel flow channel structure, multiple independent heat exchange flow channels 1 simultaneously contact the heat exchange working medium, thereby realizing larger-area distributed heat exchange and being suitable for the demand for rapid heat dissipation. In the series flow channel structure, the working medium sequentially passes through each heat exchange flow channel 1, thereby prolonging the flow path of the working medium inside the direct cooling plate and enabling the working medium to fully contact the direct cooling plate, so as to achieve higher heat exchange efficiency.

[0036] In order to further improve the heat exchange efficiency, the continuous heat exchange flow channel 1 can be designed in a serpentine structure. The serpentine structure prolongs the flow path of the working medium inside the direct cooling plate by increasing the length and tortuosity of the heat exchange flow channel 1, thereby expanding the contact area of the working medium with the direct cooling plate and fully utilizing the surface of the direct cooling plate for heat exchange. This design is conducive to improving the heat exchange efficiency in a limited space and is a common heat exchange optimization method.

[0037] In terms of specific structure, the basic structure of the direct cooling plate includes a bottom plate 2 and a face plate 3, the bottom plate 2 has grooves 4 for forming flow channels, and the face plate 3 seals the grooves 4 to form complete heat exchange flow channels 1. According to the arrangement position of the heat exchange surface, the bottom plate 2 and / or the face plate 3 use metal materials with high thermal conductivity, such as aluminum alloy or copper, to ensure good heat conduction effect.

[0038] In this embodiment, the inner wall surface of the groove 4 of the bottom plate 2 or the bottom surface of the face plate 3 is provided with turbulence structures 5. These turbulence structures 5 change the flow direction and flow rate of the working medium, generate a flow guiding pulsation impact effect, and thereby improve the heat exchange efficiency.

[0039] Specifically, the turbulence structure 5 can be in the shape of a protrusion or a depression, forming a turbulent flow region inside the heat exchange flow channel 1, increasing the contact efficiency of the working medium with the inner wall of the heat exchange flow channel 1, and thereby improving the heat exchange efficiency.

[0040] When the turbulence structure 5 is in the shape of a protrusion, it can be in the shape of a barb, a sawtooth, or a teardrop as shown in FIG. 5. Figures 4-6

[0041] During the manufacturing process of the direct cooling plate, the bottom plate 2 and the face plate 3 can be fixed by welding or bonding, etc., to ensure good sealing performance. During the manufacturing process, the height and shape of the turbulence structure 5 also need to be accurately controlled to ensure that the flow resistance and heat exchange performance of the refrigerant in the flow channel reach the best balance. The material of the turbulence structure 5 is the same as the overall material of the direct cooling plate, which is usually a metal with high thermal conductivity, to avoid increasing the thermal resistance due to different materials. In addition to the selection of materials, the control of the manufacturing process is also crucial. The accuracy of the flow channel and the uniformity of the turbulence structure must be ensured to guarantee the consistency and reliability of the cooling performance.

[0042] ​In the specific structure of the convex spoiler structure 5, the convex design includes a first inclined surface consistent with the flow direction of the working medium, which extends to the inner wall of the flow channel through a second inclined surface or an arc-shaped transition surface, forming a streamlined structure to reduce the resistance of fluid flow.

[0043] It should be understood that the spoiler structure 5 causes the pulsation effect of the fluid during the flow of the working medium. When the working medium encounters the spoiler structure 5, the flow direction and speed will change rapidly, for example, in the convex spoiler structure 5, the inclined surface and the transition surface of the convex structure cause the fluid to deflect and form a low-pressure area behind the convex structure. The low-pressure area causes the fluid to form backflow and vortex flow behind the convex structure, forming a complex vortex structure, and these vortexes cause the fluid to change speed in the local area, thereby causing the pulsation effect of the fluid.

[0044] This pulsation effect significantly improves the heat exchange effect.

[0045] Specifically, first, the pulsating flow enhances the relative motion between the working medium and the wall of the heat exchange channel 1, thereby constantly updating the thermal boundary layer, resulting in a reduction in the thickness of the boundary layer. Since the boundary layer is thinner, heat is more easily transferred from the working medium to the wall or from the wall to the working medium, so the heat exchange coefficient is improved. Second, the pulsation effect enhances the mixing of the working medium, allowing the working medium in the high-temperature region to mix better with the working medium in the low-temperature region, reducing the temperature gradient in the heat exchange channel 1 and further improving the heat exchange efficiency. In this way, the convex structure allows the working medium to exchange heat more fully with the wall of the flow channel, significantly improving the overall cooling effect.

[0046] To further enhance the heat exchange effect, the design of the spoiler structure 5 can be optimized according to different application scenarios. In the design of the heat exchange channel 1, the spoiler structure 5 can be arranged symmetrically along the axis of the heat exchange channel 1, as shown in Figure 3 Alternatively, it can be arranged in a staggered manner. Different arrangements will change the flow pattern of the working medium in the heat exchange channel 1, thereby producing a local pulsation effect and improving the heat exchange efficiency. In some specific designs, the spoiler structure 5 is arranged only on one side of the heat exchange channel 1 along the axis of the flow channel to meet the local need for heat exchange enhancement. In addition, the inner wall of the heat exchange channel 1 is also provided with fine grooves (not shown in the figure) for capillary transport, which helps to guide the working medium during the flow of the working medium, ensuring uniform distribution of the working medium and improving the overall heat exchange effect.

[0047] It is important to understand that the design of the capillary transport fine grooves is also an important factor in improving cooling performance. The fine grooves can effectively guide the working fluid to be evenly distributed along the inner wall of the flow channel, preventing the working fluid from stagnating or flowing too fast in local areas. These fine grooves make the working fluid flow more evenly in the flow channel through capillary action, so that heat can be more evenly dissipated, avoiding the phenomenon of local overheating. At the same time, the fine grooves can also enhance the flow stability of the working fluid in the flow channel, reduce unnecessary vortex flow and flow resistance, and further optimize the cooling performance.

[0048] For example, in the battery cooling system of an electric vehicle, the direct cooling plate is in close contact with the battery module, effectively conducting the heat generated by the battery during operation. During high-speed driving of an electric vehicle, the battery system generates a large amount of heat, which may affect the performance and life of the battery if not effectively dissipated in time. By setting the turbulence structure inside the direct cooling plate, the working fluid forms pulsating flow in the flow channel, making full use of the temperature difference between the working fluid and the inner wall of the flow channel, thereby significantly improving the cooling efficiency. The design of the turbulence structure makes the flow of the working fluid in the flow channel more complex and diversified, and the combination of pulsating flow and vortex effect effectively increases the heat exchange efficiency between the working fluid and the flow channel wall.

[0049] Especially during high-speed driving of an electric vehicle, the heat of the battery accumulates rapidly, at which time the turbulence structure 5 in the direct cooling plate improves the disturbance effect of the working fluid through turbulent and pulsating flow, achieving high-efficiency cooling. This high-efficiency cooling is crucial for the safety and performance of the battery. During long-time high-speed operation, effective control of the battery temperature can prevent battery failure caused by overheating and prolong the service life of the battery. In addition, pulsating flow can also prevent the working fluid in the flow channel from forming stagnant zones, which often lead to a decrease in heat exchange efficiency, and the pulsating effect can effectively eliminate these stagnant zones.

[0050] In practical applications, the present embodiment has good technical advantages. For example, in experiments, the direct cooling plate with staggered zigzag turbulence structure 5 has a cooling efficiency that is about 18.5% higher than that of the direct cooling plate without the turbulence structure. This is because the zigzag structure 5 forms a more complex flow pattern in the flow channel, making the heat exchange between the working fluid and the flow channel wall more sufficient. This design is suitable for battery modules with high heat dissipation requirements, and particularly shows significant advantages in applications such as electric vehicles and energy storage devices.

[0051] Although exemplary embodiments of the present disclosure have been described, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included within the scope of protection of the present disclosure as defined by the claims. The present disclosure is defined by the appended claims, and equivalents of these claims are also included.

Claims

1. A direct cooling plate for battery working fluid with a flow channel featuring a flow-guiding, pulsating impact-enhanced condensation structure, characterized in that: The direct cooling plate is internally provided with a plurality of heat exchange channels; a turbulence structure is protruded / concaved on the inner wall surface of the heat exchange channel, In some embodiments, the direct cooling plate comprises a bottom plate and a panel, the bottom plate is provided with a groove for forming a flow channel, and the panel seals the upper end opening of the groove to form a heat exchange channel.

2. A battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure flow channel as claimed in claim 1, characterized in that: The turbulence structure is arranged on the inner wall surface of the groove of the bottom plate.

3. A battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure flow channel as claimed in claim 1, characterized in that: The turbulence structure is arranged on the bottom surface of the panel.

4. A battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure flow channel as claimed in claim 1, characterized in that: The heat exchange channel is internally provided with a plurality of turbulence structures which are symmetrically arranged along the axial direction of the heat exchange channel.

5. A battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure flow channel as claimed in claim 1, characterized in that: The heat exchange channel is internally provided with a plurality of turbulence structures which are staggered arranged along the axial direction of the heat exchange channel.

6. A battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure flow channel as claimed in claim 1, characterized in that: The heat exchange channel is provided with a plurality of turbulence structures which are arranged on one side of the heat exchange channel along the axial direction of the heat exchange channel.

7. A battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure flow channel as claimed in claim 1, characterized in that: The turbulence structure is a protruding structure, the protruding structure comprises a first inclined surface which is consistent with the flow direction of the fluid in the heat exchange channel, the first inclined surface extends to the inner wall surface of the heat exchange channel from the front end of the protrusion through a second inclined surface or an arc transition surface, and is connected with the inner wall surface of the flow channel, so that the whole protruding structure forms one of a barb-shaped, jagged or tear-drop-shaped structure.

8. A battery working medium direct cooling plate with flow-guiding pulsating impact enhanced condensation structure flow channel as claimed in claim 1, characterized in that: The inner wall surface of the heat exchange channel is provided with a plurality of fine grooves for capillary transport.

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