Splicing type direct cooling plate with infusion core

Abstract

The utility model discloses a splicing type direct cooling plate with a liquid conveying core. The direct cooling plate comprises a plate body with a heat exchange flow channel, and a liquid inlet flow collector and a liquid outlet flow collector which are oppositely mounted at the two ends of the plate body and connected with the two ends of the heat exchange flow channel correspondingly. The plate body comprises a bottom plate and a plurality of unit cover plates which are matched with the bottom plate and provided with channels, the unit cover plates and the bottom plate are matched to form heat exchange runners, the top surfaces of the unit cover plates serve as outer heat exchange surfaces, and oppositely, the inner bottom surfaces, used for forming the heat exchange runners, in the unit cover plates serve as inner heat exchange surfaces; a liquid absorption core attached to the inner bottom face is arranged in the heat exchange runner. The liquid absorption core is provided with a capillary liquid conveying structure and used for conveying a refrigerant working medium in the heat exchange flow channel to the inner heat exchange face of the heat exchange flow channel. According to the direct cooling plate, the efficient capillary suction force and the working medium transportation characteristic of the wick are utilized, so that the wick fully exchanges heat with a heat source in contact with the upper shell plate, and the heat dissipation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of battery temperature control, and in particular to a spliced direct cooling plate with infusion cores. BACKGROUND

[0002] With the transformation of global energy structure and the improvement of environmental protection awareness, the market demand for new energy vehicles, especially electric vehicles, is rapidly growing. In this context, as the core component of electric vehicles, the performance and safety of batteries directly affect the performance of the whole vehicle and the driving experience of users. A large amount of heat is generated during the charging and discharging of the battery, and if this heat cannot be effectively dissipated, not only will the service life of the battery be significantly shortened, but also safety accidents such as thermal runaway may occur. Therefore, designing an efficient battery thermal management system becomes critical. This not only involves improving the life and performance of the battery, but also relates to the safety of the whole vehicle, as well as the trust and acceptance of new energy vehicles by users.

[0003] Currently, water-cooled plates are commonly used in electric vehicles as the main means of battery heat dissipation. Water-cooled plates absorb and carry away the heat generated by the battery through the circulation of liquid coolant in the cooling channel, to some extent, effectively solving the problem of battery heat dissipation. However, with the increasing demand for high-capacity batteries and fast charging in electric vehicles, the traditional water-cooled plate system gradually shows its limitations. Under high-load charging and discharging conditions, the cooling efficiency of the water-cooled plate is difficult to meet the demand for rapid heat dissipation, especially during high-power charging, the insufficient cooling efficiency may cause the battery temperature to rise rapidly. In addition, the water-cooled system itself also faces problems such as heavy weight, complex structure, high cost, etc., which limit the overall performance and user experience of electric vehicles.

[0004] The main reason for these deficiencies is that the heat dissipation method of the water-cooled plate relies on sensible heat transfer, and the cooling liquid carries away the heat of the battery through heat exchange, but its heat exchange efficiency is limited by the heat capacity and flow rate of the liquid coolant. When facing high heat flux density and rapid heat dissipation requirements, the efficiency of sensible heat transfer has limited room for improvement. At the same time, the structural design of the water-cooled plate needs more complex flow channels and more powerful circulation systems to meet higher heat dissipation requirements, which undoubtedly increases the weight and manufacturing cost of the entire system. In addition, the unstable flow of the coolant in the flow channel is prone to form columnar gas plugs, causing poor medium flow, which significantly weakens the heat dissipation effect. In the case of high charging or discharging power, the non-uniformity of the cooling medium is further aggravated, forming local hot spots, affecting the stability and safety of the battery. These problems limit the application of traditional water-cooled plates under high performance requirements, especially in high temperature environments, their heat transfer performance decreases more significantly, which further limits the performance of traditional cooling systems under complex working conditions. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to at least overcome one of the deficiencies of the prior art, provide a spliced straight cooling plate with a liquid transport core, which utilizes the high-efficiency capillary suction of the liquid transport core and the transport characteristics of the working medium to fully exchange heat with the heat source in contact with the upper shell plate, thereby improving the heat dissipation efficiency.

[0006] To achieve the above-mentioned purpose, the present application discloses a spliced straight cooling plate with a liquid transport core, which comprises a plate body with a heat exchange channel, an inlet liquid collector and an outlet liquid collector oppositely mounted at both ends of the plate body and respectively connected with both ends of the heat exchange channel; the plate body comprises a bottom plate and a plurality of unit cover plates matched with the bottom plate and provided with grooves, the unit cover plates and the bottom plate cooperate to form the heat exchange channel, the top surface of the unit cover plate serves as an outer heat exchange surface, and the inner bottom surface of the unit cover plate for forming the heat exchange channel serves as an inner heat exchange surface; the heat exchange channel is provided with a liquid transport core attached to the inner bottom surface; the liquid transport core has a capillary liquid transport structure for sending the refrigerant working medium in the heat exchange channel to the inner heat exchange surface of the heat exchange channel.

[0007] Further, the inlet liquid collector is provided with an inlet port for the refrigerant working medium to enter, and the inlet liquid collector is provided with a distribution channel connected with the inlet port.

[0008] Further, the outlet liquid collector is provided with an outlet port for the refrigerant working medium in liquid and / or vapor state after heat exchange to exit, and the outlet liquid collector is provided with a distribution channel connected with the outlet port.

[0009] Optionally, the cross section of the heat exchange channel is rectangular, and correspondingly, the liquid transport core is a plate-like structure with a door-shaped cross section.

[0010] Optionally, the cross section of the heat exchange channel is inverted trapezoidal, and correspondingly, the liquid transport core is a plate-like structure with a door-shaped cross section.

[0011] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0012] 1. Improve heat dissipation efficiency: by utilizing the capillary liquid transport structure of the liquid transport core, the refrigerant working medium can be more efficiently transported in the heat exchange channel, thereby realizing faster heat exchange and improving the overall heat dissipation performance.

[0013] 2. Simple and flexible structure: the spliced straight cooling plate is designed by the bottom plate and a plurality of unit cover plates, the unit cover plates and the bottom plate cooperate to form the heat exchange channel, the structure is simple and easy to modularize, and easy to produce and maintain.

[0014] 3. Reduce local overheating points: the uniform arrangement of the liquid transport core in the heat exchange channel ensures the stable flow of the refrigerant working medium, avoids the formation of local gas blockage, thereby reduces the hot spot area, and ensures the uniformity and safety of the battery temperature.

[0015] 4. Adaptability to various heat exchange channel designs: This design supports various channel cross-section forms (such as rectangular, inverted trapezoidal, etc.), and can be adapted to the shape of the wick, providing flexible channel design to meet different cooling needs.

[0016] 5. Enhanced cooling performance: The design of the liquid inlet collector and the liquid outlet collector ensures uniform distribution and efficient discharge of the working medium, further improving the overall cooling efficiency and the reliability of the system.

[0017] 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 this application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Many aspects of the present disclosure will become more apparent after reading the following detailed description in conjunction with the accompanying drawings, in which the relative positions, dimensions, and ranges shown in the structures of the various drawings are sometimes not representative of actual positions, dimensions, and ranges. In the drawings:

[0019] Figure 1 is a structural schematic diagram of an embodiment.

[0020] Figure 2 is a structural schematic diagram of an embodiment after removing the liquid inlet collector and the liquid outlet collector.

[0021] Figure 3 is an exploded view of a structure of an embodiment.

[0022] Figure 4 is a structural schematic diagram of a unit cover plate and a wick cooperating in an embodiment.

[0023] Figure 5 is a structural schematic diagram of a unit cover plate in another embodiment.

[0024] Figure 6 is a structural schematic diagram of a unit cover plate and a bottom plate cooperating in another embodiment. DETAILED DESCRIPTION

[0025] The present disclosure will be described below with reference to the accompanying drawings, which show several embodiments of the present disclosure. It should be understood that the present disclosure can be presented in many different ways, and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete, and to fully inform those skilled in the art of the scope of protection of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0026] It should be understood that like drawing reference numerals in all figures indicate like elements. In the figures, the dimensions of certain features can be exaggerated for clarity.

[0027] It is to be understood that the phraseology and terminology used herein is for the purpose of description and not of limitation. All technical and scientific terms used herein are to the same effect as those commonly understood to one of ordinary skill in the art unless otherwise defined. For the purposes of the present disclosure, technical, methodological and procedural descriptions known to one of ordinary skill in the relevant art can not be discussed in detail for the sake of brevity and / or clarity, but should be considered as part of the present disclosure where appropriate.

[0028] As used in the specification, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. As used in the specification and in the claims, the term "comprising" means the elements recited are present, but does not exclude the presence of one or more additional elements. As used in the specification and in the claims, the phrase "and / or, " means one or the other, or both. Embodiments

[0029] As Figures 1-4 shown, the present embodiment provides a spliced direct cooling plate with a liquid transport wick, designed to significantly improve heat exchange efficiency and optimize the transport path of the refrigerant working medium. The direct cooling plate is composed of a plate body 1, a liquid inlet manifold 2, and a liquid outlet manifold 3. The plate body 1 is composed of a bottom plate 4 and a plurality of unit cover plates 5, which cooperate with the bottom plate 4 to form heat exchange flow channels 6. The following content will elaborate on the structure, connection relationship, and specific working mechanism of each component.

[0030] Specifically, the plate body 1 structure of the direct cooling plate includes a bottom plate 4 and a plurality of unit cover plates 5. The top surface of the unit cover plate 5 serves as an external heat exchange surface 8, while the inner bottom surface forms a heat exchange flow channel 6, which becomes an internal heat exchange surface 7.

[0031] The mating surface between each unit cover plate 5 and the bottom plate 4 is sealed, and a complete heat exchange flow channel system is constructed within the groove of the cover plate 5. One end of the heat exchange flow channel 6 is the liquid inlet end, and the other end is the liquid outlet end,

[0032] More specifically, the inner top surface of the lower opening groove formed by the cover plate 5 is the internal heat exchange surface 7, and there is a side surface in contact with the internal heat exchange surface 7. The liquid wick 9 is in contact with both the internal heat exchange surface 7 and the side surface. The capillary transport structure absorbs the refrigerant working medium from the side surface and sends it to the internal heat exchange surface 7.

[0033] In this embodiment, the mechanical fit between the unit cover plate 5 and the bottom plate 4 is achieved in various ways, such as bolting, snap fit or welding. These connection methods not only ensure the structural integrity and sealing of the direct cooling plate, but also cope with long-term mechanical stress and environmental changes. These mechanical connection methods can ensure stable operation of the system under high temperature, high pressure or other harsh environments. The wick 9 and the inner heat exchange surface 7 are fixed by adhesive or welding to ensure that the wick 9 is always in close contact with the inner bottom surface, thereby effectively preventing displacement caused by the flow of refrigerant working medium and ensuring the transfer efficiency and heat exchange effect of the refrigerant working medium.

[0034] In this embodiment, the wick 9 is arranged inside the heat exchange channel 6, which is in close contact with the inner bottom surface of the unit cover plate 5 and has a unique capillary transport structure, which can effectively transfer the refrigerant working medium to the inner heat exchange surface 7 of the heat exchange channel 6. The liquid inlet collector 2 is installed at one end of the plate body 1 and connected with the inlet end of the heat exchange channel 6, ensuring that the refrigerant working medium can enter the channel system through the liquid inlet provided on the liquid inlet collector 2; the liquid outlet collector 3 is provided at the other end of the plate body 1 and connected with the outlet end of the heat exchange channel 6, and the refrigerant working medium after heat exchange is discharged through the liquid outlet provided on the liquid outlet collector 3.

[0035] More specifically, the liquid inlet collector 1 is provided with a liquid inlet and a shunt channel inside the collector for uniformly distributing the refrigerant working medium into multiple heat exchange channels 6. In this way, the refrigerant working medium can be evenly dispersed when entering the heat exchange channel 6, thereby ensuring that each part of each heat exchange channel 6 can achieve uniform cooling effect. The liquid outlet collector 3 is provided with a liquid outlet and also provided with a shunt channel inside the collector connected with the liquid outlet for efficiently discharging the refrigerant working medium after heat exchange.

[0036] It should be understood that in actual application scenarios, the liquid outlet is usually connected to a condenser or a liquid storage device to realize the recycling of the refrigerant working medium.

[0037] In the above structure, it should be understood that the cross-sectional shape of the heat exchange channel 6 can be flexibly adjusted according to design requirements, for example, it can be rectangular as shown in Figure 5 or inverted trapezoidal as shown in Figure 6 . Accordingly, the wick 9 is also designed as a plate-shaped structure matching the similar door-shaped cross-section according to the shape of the heat exchange channel 6, so as to ensure that the wick 9 can be precisely fitted to the inner wall of the heat exchange channel 6, thereby improving the transport efficiency and heat exchange effect of the refrigerant working medium.

[0038] Especially when the heat exchange channel 6 is inverted trapezoidal, the structure design of the wick 9 can better adapt to the channel shape, ensuring uniform distribution of the working medium in the channel, thereby improving the overall heat exchange performance. Through reasonable optimization of the structure design, the capillary transport structure of the wick 9 can maximize the use of the latent heat of the working medium, ensuring the efficiency of the heat exchange process, and thus achieving precise temperature control. This optimization not only improves the utilization efficiency of the working medium, but also enables the entire system to operate stably under high load conditions.

[0039] The direct cooling plate has wide application prospects in battery cooling systems. During use, the direct cooling plate is closely attached to the surface of the battery cells that need to be cooled. The working medium enters the liquid inlet collector 2 through the liquid inlet and is evenly distributed to each heat exchange channel 6 through the distribution channels in the collector. In the heat exchange channel 6, the working medium absorbs heat and is uniformly delivered to the entire inner heat exchange surface 7 through the capillary action of the wick 9. The heat-exchanged working medium is concentrated and discharged through the distribution channels in the liquid outlet collector 3, and then circulates through the condensing system. This process realizes efficient operation of the cooling cycle and ensures the temperature stability of the battery during operation. The design can effectively control the temperature of the battery under continuous high-load working environment, preventing performance degradation or shortening of service life caused by overheating.

[0040] The direct cooling plate of the present embodiment optimizes the flow path of the working medium and the structure of the wick 9, effectively improving the efficiency of heat exchange and ensuring that the battery maintains an appropriate operating temperature during high-power operation, thereby avoiding performance degradation and shortening of service life caused by local overheating. The capillary action of the wick 9 can ensure that the working medium uniformly wets the entire inner heat exchange surface 7, avoiding the generation of local hot spots and significantly improving the overall heat dissipation performance of the direct cooling plate. Especially in the structure of a battery pack, the direct cooling plate can provide highly consistent temperature control, ensuring that the temperature difference of all battery cells is minimized, thereby improving the overall performance and service life of the battery pack.

[0041] Further, the modular design of the direct cooling plate makes its installation and maintenance more convenient. When the equipment needs to be upgraded or replaced, only the corresponding unit cover plate 5 or wick 9 needs to be replaced, without the need for overall disassembly, thereby significantly reducing maintenance costs and time. In addition, the wick 9 is made of porous materials with good capillary action, such as metal fiber sintered materials or ceramic fibers, whose capillary structure helps to guide the working medium from the heat exchange channel 6 to the inner heat exchange surface 7, realizing continuous heat transfer. This greatly enhances the applicability of the direct cooling plate to different working environments. The modular design also means that the structure of the plate body and the collector can be flexibly adjusted according to specific heat exchange requirements in different application scenarios, greatly improving the universality and economy of the system.

[0042] For example, in the battery cooling system of an electric vehicle, the direct cooling plate can effectively maintain the temperature balance of the battery pack, thereby improving the endurance mileage and performance stability of the vehicle. In the industrial energy storage system, the modular characteristics of the direct cooling plate enable it to be flexibly adjusted according to the size of the battery pack, ensuring the safety and efficiency of the entire energy storage system. In addition, in conditions where the ambient temperature changes greatly, such as cold or hot outdoor environments, the high-temperature-resistant and corrosion-resistant materials of the direct cooling plate enable it to maintain stable cooling effect, ensuring that the battery can work safely under various extreme conditions.

[0043] While exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art 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 its essence. Therefore, all changes and modifications are included within the scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and equivalents thereof are also included.

Claims

1. A spliced ​​direct cooling plate with an infusion core, characterized in that, The direct-cooling plate includes: a plate body with heat exchange channels, and an inlet collector and a outlet collector installed opposite to each other at both ends of the plate body and respectively connected to the two ends of the heat exchange channels; the plate body includes a base plate and several unit cover plates that cooperate with the base plate and have channels, the unit cover plates cooperate with the base plate to form heat exchange channels, the top surface of the unit cover plate serves as the outer heat exchange surface, and the inner bottom surface of the unit cover plate used to form the heat exchange channels serves as the inner heat exchange surface; a liquid suction core is provided in the heat exchange channels and attached to the inner bottom surface; the liquid suction core has a capillary liquid delivery structure for delivering the refrigerant working fluid in the heat exchange channels to the inner heat exchange surface of the heat exchange channels.

2. The spliced ​​direct cooling plate with infusion core as described in claim 1, characterized in that: The liquid inlet manifold is provided with an inlet for the refrigerant to enter, and at the same time, the liquid inlet manifold is provided with a branch channel connected to the inlet.

3. The spliced ​​direct cooling plate with infusion core as described in claim 1, characterized in that: The drain collector is provided with a drain port for discharging the liquid and / or gaseous refrigerant working fluid after heat exchange. At the same time, the drain collector is provided with a branch channel connected to the drain port.

4. The spliced ​​direct cooling plate with infusion core as described in claim 1, characterized in that: The heat exchange channel has a rectangular cross-section, and the liquid suction core is a plate-like structure with a gate-shaped cross-section.

5. A spliced ​​direct cooling plate with an infusion core as described in claim 1, characterized in that: The heat exchange channel has an inverted trapezoidal cross-section, and correspondingly, the liquid suction core has a plate-like structure with a portal-shaped cross-section.

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