Heat exchange cold plate structure and lithium battery

Abstract

The utility model provides a heat exchange cold plate structure and a lithium battery, and relates to the technical field of battery heat dissipation, the heat exchange cold plate structure comprises a collecting pipe and a liquid cooling substrate, and the collecting pipe is provided with a liquid inlet and a liquid outlet; the flow collecting pipe is provided with a first end and a second end opposite to the first end in the axial direction of the liquid cooling substrate, and the first end is fixed on the flow collecting pipe; at least one flow channel group is arranged in the liquid cooling substrate, the flow channel group is provided with a first flow channel cavity and a second flow channel cavity, and the first flow channel cavity and the second flow channel cavity are parallel to the axial direction of the liquid cooling substrate; and the first flow channel cavity communicates with the liquid inlet, the second flow channel cavity communicates with the liquid outlet, and the first flow channel cavity communicates with the second flow channel cavity at the second end, so that the heat exchange medium entering from the liquid inlet flows into the second flow channel cavity along the first flow channel cavity. The temperature equalizing effect in the battery is better ensured, the temperature difference is reduced, and the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery heat dissipation, and in particular to a heat exchange cold plate structure and a lithium battery. BACKGROUND

[0002] With the rapid development of new energy vehicles such as electric vehicles and hybrid electric vehicles, the capacity and safety of corresponding batteries are increasingly required. With the increase of the capacity of the battery, a large amount of heat will be generated in the process of rapid charging and discharging. If the generated heat cannot be quickly and effectively dissipated, the accumulation of heat may cause thermal runaway of the battery, thereby causing serious safety accidents such as fire and explosion. Therefore, the battery needs to be cooled.

[0003] The liquid cooling plate is used for dissipating heat for the battery module of the electric vehicle. When the battery works, heat is generated. When the battery module reaches a preset temperature, the battery cooling circulation system is started. Under the power action of the pump, the cooling liquid flows into the liquid cooling plate from the inlet, passes through the flow channel of the liquid cooling plate, and then flows out from the outlet, thereby taking away the excess heat of the battery module and playing a role in cooling the battery module. In the use of the liquid cooling plate, the cooling liquid is crucial. At present, the phase change material can absorb or release a large amount of heat during the phase change process, and the temperature change range during the phase change is relatively narrow, and the latent heat is large. Therefore, the phase change material can be used as a heat exchange medium in the liquid cooling plate, which can present very good cooling effect. However, in the scheme of using the phase change material as the heat exchange medium, during the flow of the liquid in the flow channel, with the absorption of the heat of the battery by the cooling liquid, the absorbed heat accumulates in the liquid, the temperature of the liquid rises, the phase change occurs, and thus the cooling effect is uneven, which affects the normal use of the battery.

[0004] Therefore, it is urgent to provide a heat exchange cold plate structure and a lithium battery, so as to better ensure the uniform temperature effect, reduce the temperature difference, and improve the battery life. Practical new type content

[0005] The application provides a heat exchange cold plate structure and a lithium battery to solve the problem of being unable to maintain uniform temperature, so as to reduce the temperature difference in the heat exchange cold plate structure, improve the cooling effect, and improve the battery life.

[0006] In a first aspect, the application provides a heat exchange cold plate structure, comprising: a manifold provided with an inlet and an outlet;

[0007] The liquid cooling base plate has a first end and a second end opposite the first end along an axial direction of the liquid cooling base plate, and the first end is fixed on the header; at least one flow channel group is arranged in the liquid cooling base plate, and the flow channel group has a first flow channel cavity and a second flow channel cavity, and the first flow channel cavity and the second flow channel cavity are parallel to the axial direction of the liquid cooling base plate; the first flow channel cavity is in communication with the liquid inlet, the second flow channel cavity is in communication with the liquid outlet, and the first flow channel cavity and the second flow channel cavity are in communication at the second end, so that the heat exchange medium entering from the liquid inlet flows into the second flow channel cavity along the first flow channel cavity.

[0008] Through the above scheme, the header is provided with a liquid inlet and a liquid outlet for the inflow and outflow of the heat exchange medium. The liquid cooling base plate is the main part of the cold plate structure, which has a first end and a second end along the axial direction. The first end is fixed on the header, and the second end is opposite the first end. At least one flow channel group is arranged in the liquid cooling base plate, and the flow channel group contains a first flow channel cavity and a second flow channel cavity. The first flow channel cavity and the second flow channel cavity are in communication at the second end of the liquid cooling base plate, ensuring that the heat exchange medium can smoothly flow from the first flow channel cavity to the second flow channel cavity, and the first flow channel cavity and the second flow channel cavity are parallel to the axial direction of the liquid cooling base plate, that is, they extend along the length direction of the cold plate. The first flow channel cavity is in communication with the liquid inlet, and the second flow channel cavity is in communication with the liquid outlet. This means that after the heat exchange medium enters from the liquid inlet, it will first flow through the first flow channel cavity, then flow into the second flow channel cavity, and finally flow out from the liquid outlet, and the flow direction of the heat exchange medium in the first flow channel cavity and the flow direction of the heat exchange medium in the second flow channel cavity are opposite, which can maximize the temperature difference and improve the heat exchange efficiency. When the relatively cold heat exchange medium contacts the relatively hot heat-generating body, the temperature difference is larger, and the heat exchange effect is better. Moreover, since the flow directions of the heat exchange medium in the first flow channel cavity and the second flow channel cavity are opposite, their adjacent areas can influence each other, which helps to reduce the temperature gradient inside the liquid cooling plate and achieve more uniform temperature distribution. At the same time, the front and back of the liquid cooling base plate can be used for heat exchange, which means that it can simultaneously provide heat dissipation for two adjacent battery modules, and this design improves the utilization rate and heat dissipation efficiency of the liquid cooling plate. Through this design, the liquid cooling plate can more effectively absorb and carry away heat, reduce the temperature of the battery module, and thus improve the thermal stability and performance of the entire system.

[0009] In a possible design, the axial direction of the header is perpendicular to the axial direction of the liquid cooling base plate, and the header includes a first header body and a second header body, and the first header body and the second header body are parallel to the axial direction of the header; the liquid inlet is arranged on the first header body, and the liquid outlet is arranged on the second header body.

[0010] By the above scheme, the manifold includes a first header and a second header, both of which are parallel to the axial direction of the manifold. This parallel layout helps to evenly distribute and collect fluid, reducing the resistance of fluid flow. The first header is provided with an inlet, and the second header is provided with an outlet. This design allows the heat exchange medium (such as cooling liquid) to enter and exit the liquid cooling plate in an orderly manner, ensuring the continuity and uniformity of fluid flow. The axial direction of the manifold is perpendicular to the axial direction of the liquid cooling substrate. This design allows the fluid to flow along the first flow channel cavity and the second flow channel cavity parallel to the axial direction of the liquid cooling substrate after entering the liquid cooling plate, thereby achieving more efficient heat exchange. The perpendicular layout helps to distribute the fluid more evenly in the liquid cooling plate, improving the efficiency of heat exchange. Since the first flow channel cavity is in communication with the inlet, the second flow channel cavity is in communication with the outlet, and the first flow channel cavity and the second flow channel cavity are in communication at the second end of the liquid cooling substrate, the heat exchange medium enters from the inlet, flows through the first flow channel cavity first, then flows into the second flow channel cavity, and finally flows out from the outlet. This design helps the heat exchange medium form an orderly flow path in the liquid cooling plate, improving the efficiency of heat exchange. This design optimizes the layout of the manifold and the liquid cooling substrate, as well as the flow path of the heat exchange medium, achieving more efficient heat exchange and more uniform temperature control, and improving the heat dissipation efficiency.

[0011] In one possible design, the second header is located between the first header and the liquid cooling substrate, and the second header has a first hole site with an area matching the first end cross section. The first end is embedded in the first hole site to connect with the second header.

[0012] By the above scheme, the second header is located between the first header and the liquid cooling substrate, which helps to guide the heat exchange medium from the liquid cooling substrate to the outlet while maintaining the continuity and uniformity of fluid flow. The second header has a first hole site with an area matching the first end cross section of the liquid cooling substrate. This design ensures that the first end of the liquid cooling substrate can be smoothly embedded in the second header, forming a tight connection and reducing the risk of fluid leakage. The first end of the liquid cooling substrate is embedded in the first hole site to connect with the second header. This embedded connection not only provides structural stability, but also helps to effectively transfer heat from the liquid cooling substrate to the second header, and then to the outlet through the second header. The heat exchange medium enters the first header from the inlet, then flows into the flow channel group in the liquid cooling substrate, after heat exchange, flows out from the second end of the liquid cooling substrate, and then flows out from the outlet on the second header. This design allows the fluid to form an orderly flow path inside the liquid cooling plate, improving the efficiency of heat exchange. Since the second header is directly connected to the liquid cooling substrate, it can more effectively collect the heat transferred from the liquid cooling substrate and transfer it to the outlet, thereby improving the overall heat exchange efficiency. By optimizing the connection between the header and the liquid cooling substrate, the heat exchange efficiency and structural stability of the liquid cooling plate are improved.

[0013] In a possible design, the first flow channel cavity is provided with a first riser pipe, the first riser pipe passing from the second header into the first header; and the second flow channel cavity is in communication with the second header.

[0014] Through the above scheme, the first riser pipe is equivalent to an intermediate pipe connecting the first header and the first flow channel cavity. Since the second header is interposed between the first riser pipe and the first flow channel cavity, the first riser pipe passes from the second header into the first header and is in communication with the first header, thereby ensuring that the heat exchange medium can flow from the first header to the first flow channel cavity, achieving orderly distribution of the heat exchange medium during flow, enabling complex fluid flow paths to be achieved in a limited space, maximizing the use of space, while also maintaining the compactness of the design. Through the first riser pipe, the flow of the heat exchange medium is orderly distributed to the first flow channel cavity, which helps to maintain the continuity and uniformity of fluid flow, thereby improving the efficiency of the entire liquid cooling system.

[0015] In a possible design, the first header is located between the second header and the liquid cooling substrate. The first header has a second hole site, the area of the second hole site matching the cross section of the second end, and the first end is embedded in the second hole site to connect with the first header.

[0016] Through the above scheme, the first header is located between the second header and the liquid cooling substrate. This layout helps to achieve effective distribution and collection of fluid in the liquid cooling system, while maintaining the compactness of the structure. The first header has a second hole site, and the area of the second hole site matches the cross section of the second end of the liquid cooling substrate. This design ensures that the second end of the liquid cooling substrate can be smoothly embedded into the second hole site, and the edges of the second hole site and the second end are welded to achieve a tight connection and communication between the liquid cooling substrate and the header pipe. The heat exchange medium can flow more quickly from the first header to the first flow channel cavity, achieving orderly distribution of the heat exchange medium during flow.

[0017] In a possible design, the second flow channel cavity is provided with a second riser pipe, the second riser pipe passing from the first header into the second header; and the first flow channel cavity is in communication with the first header.

[0018] Through the above scheme, the second riser pipe is equivalent to an intermediate pipe connecting the second header and the second flow channel cavity. Since the first header is interposed between the second riser pipe and the second flow channel cavity, the second riser pipe passes from the first header into the second header and is in communication with the second header, thereby ensuring that the heat exchange medium can flow from the second flow channel cavity to the second header, and then to the liquid outlet. This achieves orderly distribution of the heat exchange medium during flow, enabling complex fluid flow paths to be achieved in a limited space, maximizing the use of space, while also maintaining the compactness of the design.

[0019] In one possible design, the diameter of the first or second flow channel cavity is greater than 2 mm, and the cross-sectional areas of the first and second flow channel cavities are equal.

[0020] With the above design, the diameter of either the first or second flow channel cavity is greater than 2 mm. This size provides sufficient space to reduce fluid flow resistance while ensuring adequate heat exchange area. A larger diameter helps increase fluid velocity, thereby improving heat transfer efficiency. Having equal cross-sectional areas for the first and second flow channel cavities helps maintain fluid dynamic balance, reducing pressure loss and velocity variations caused by differences in channel dimensions. This contributes to maintaining the stability and efficiency of the liquid cooling system. Simultaneously, this design also ensures flexibility, allowing engineers to adjust the channel dimensions according to specific heat loads and fluid characteristics to optimize the performance of the liquid cooling plate.

[0021] In one possible design, a first sealing cap is also included, which is disposed at the second end for sealing the second end of the flow channel assembly.

[0022] With the above scheme, the main function of the first sealing cap is to seal the second end of the flow channel assembly, preventing heat exchange medium leakage and ensuring the normal operation of the liquid cooling system. It maintains the system's airtightness by sealing the end of the flow channel assembly, preventing air or other contaminants from entering the flow channel.

[0023] In one possible design, a second sealing cap is also included, which is disposed at both ends of the first manifold and the second manifold to seal both ends of the first manifold and the second manifold.

[0024] Through the above scheme, the main function of the second sealing cap is to seal both ends of the manifold, meaning that there is a sealing cap at both ends of each manifold, thereby ensuring the airtightness of the entire manifold system. The second sealing cap can prevent heat exchange medium leakage, ensuring the normal operation and safety of the liquid cooling system.

[0025] Secondly, this application provides a lithium battery, including a battery module and any of the above-mentioned heat exchange cold plate structures.

[0026] The beneficial effects of the lithium battery provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here.

[0027] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 The structure schematic diagram of the heat exchange cold plate provided in an embodiment of the present application.

[0030] Figure 2 The structure schematic diagram of the liquid cooling base plate provided in an embodiment of the present application.

[0031] Figure 3 The first end partial enlarged view of the liquid cooling base plate provided in an embodiment of the present application.

[0032] Figure 4 Another angle structure schematic diagram of the heat exchange cold plate provided in an embodiment of the present application.

[0033] Figure 5 Another angle structure schematic diagram of the liquid cooling base plate provided in an embodiment of the present application.

[0034] Figure 6 The second end partial schematic diagram of the liquid cooling base plate provided in an embodiment of the present application.

[0035] Figure 7 The structure schematic diagram of the first plugging cap provided in an embodiment of the present application.

[0036] Figure 8 The angle schematic diagram of the manifold provided in an embodiment of the present application.

[0037] Figure 9 Another angle schematic diagram of the manifold provided in an embodiment of the present application.

[0038] Figure 10 The internal structure schematic diagram of the manifold provided in an embodiment of the present application.

[0039] Figure 11 The structure schematic diagram of the second plugging cap provided in an embodiment of the present application.

[0040] BRIEF DESCRIPTION OF DRAWINGS: 100, liquid cooling base plate, 101, first end; 102, second end; 110, first flow channel cavity; 120, second flow channel cavity; 130, first plugging cap; 200, manifold; 210, first flow collector; 220, second flow collector; 211, liquid inlet; 221, liquid outlet; 230, first hole site; 300, first water isolation pipeline; 301, second plugging cap. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0043] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0045] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0047] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0048] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] Phase change cooling materials, also known as phase change materials (PCMs), are a class of substances that can absorb or release a large amount of latent heat during a phase change process. These materials store and release energy during melting and solidification. For example, R134a, used in phase change cooling plates, can address heat dissipation requirements of up to 2.5kW / GPU and 175kW / Rack, with a maximum heat dissipation capacity of 8W / (cm²·℃).

[0050] The cooling effect of liquid cooling plate structures using phase change cooling materials in related technologies is uneven and the utilization rate is low, so the structure needs to be improved.

[0051] In view of this, embodiments of this application provide a heat exchange cold plate structure and a lithium battery. At least one flow channel group is provided within the liquid-cooled substrate, including a first flow channel cavity and a second flow channel cavity. This allows the heat exchange medium to enter from the inlet, first flowing through the first flow channel cavity, then into the second flow channel cavity, and finally out from the outlet. Furthermore, the flow direction of the heat exchange medium in the first and second flow channel cavities is opposite. This counter-current heat exchange method maximizes the temperature difference and improves heat exchange efficiency. It also fully utilizes the space of the liquid-cooled substrate, maximizing uniform heat dissipation. Moreover, the liquid-cooled substrate can be made thinner, allowing for more effective absorption and removal of heat, reducing the temperature of the battery module, and thus improving the thermal stability and performance of the entire system.

[0052] In order to make the personnel in the art better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0053] Figure 1 The structure of the heat exchange cold plate provided in the embodiment is shown in the figure. Figure 2 The structure of the liquid cooling substrate 100 provided in the embodiment is shown in the figure. Figure 3 The first end 101 of the liquid cooling substrate 100 provided in the embodiment is shown in the figure. Figure 8 The structure of the manifold 200 provided in the embodiment is shown in the figure. Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 8 The heat exchange cold plate provided in the embodiment includes a manifold 200 and a liquid cooling substrate 100 connected to the manifold 200.

[0054] The manifold 200 is provided with an inlet 211 and an outlet 221 for the inflow and outflow of the heat exchange medium.

[0055] The liquid cooling substrate 100 is the main part of the cold plate structure, and has a first end 101 and a second end 102 opposite to the first end 101 along the axial direction of the liquid cooling substrate 100. The first end 101 is fixed on the manifold 200, and the second end 102 is opposite to the first end 101. At least one flow channel group is arranged in the liquid cooling substrate 100, and the flow channel group includes a first flow channel cavity 110 and a second flow channel cavity 120. Both the first flow channel cavity 110 and the second flow channel cavity 120 are parallel to the axial direction of the liquid cooling substrate 100. The first flow channel cavity 110 is in communication with the inlet 211, and the second flow channel cavity 120 is in communication with the outlet 221. The first flow channel cavity 110 and the second flow channel cavity 120 are in communication at the second end 102, so that the heat exchange medium entering from the inlet 211 flows into the second flow channel cavity 120 along the first flow channel cavity 110.

[0056] The first flow channel cavity 110 and the second flow channel cavity 120 are in communication at the second end 102 of the liquid cooling base plate 100, the purpose is to ensure that the heat exchange medium can flow smoothly from the first flow channel cavity 110 to the second flow channel cavity 120, both the first flow channel cavity 110 and the second flow channel cavity 120 are parallel to the axial direction of the liquid cooling base plate 100, that is, they extend along the length direction of the cold plate, when the heat exchange medium enters from the liquid inlet 211, it will first flow through the first flow channel cavity 110, then flow into the second flow channel cavity 120, and finally flow out from the liquid outlet 221, and the flow direction of the heat exchange medium in the first flow channel cavity 110 and the flow direction of the heat exchange medium in the second flow channel cavity 120 are opposite, this counter-flow heat exchange mode can maximize the temperature difference and improve the heat exchange efficiency. When the cooler heat exchange medium contacts the hotter heat generating body, the temperature difference is larger, and the heat exchange effect is better. And because the flow directions of the heat exchange medium in the first flow channel cavity 110 and the second flow channel cavity 120 are opposite, their adjacent areas can influence each other, which helps to reduce the temperature gradient inside the liquid cooling plate and achieve more uniform temperature distribution. At the same time, both the front and back of the liquid cooling base plate 100 can be used for heat exchange, which means it can provide cooling for two adjacent battery modules at the same time, which improves the utilization rate and heat dissipation efficiency of the liquid cooling plate. Through this design, the liquid cooling plate can more effectively absorb and carry away heat, reducing the temperature of the battery module, thereby improving the thermal stability and performance of the entire system.

[0057] Figure 4 Another angle view of the heat exchange cold plate structure provided in the present embodiment. Figure 5 Another angle view of the liquid cooling base plate 100 structure provided in the present embodiment. Figure 6 Another angle view of the liquid cooling base plate 100 structure provided in the present embodiment. Please refer to Figures 4 to 6 The liquid cooling base plate 100 provided by the present application has three groups of flow channel groups, each flow channel group has a first flow channel cavity 110 or a second flow channel cavity 120, and at the second end 102, the first flow channel cavity 110 and the second flow channel cavity 120 are in a stepped shape, which facilitates the communication between the first flow channel cavity 110 and the second flow channel cavity 120 after the second end 102 is sealed.

[0058] Figure 7 A partial enlarged view of the second end 102 of the liquid cooling base plate 100 provided in the present embodiment. Please refer to Figure 7 A first sealing cap 130 can be provided on the liquid cooling base plate 100, and the first sealing cap 130 is arranged at the second end 102. The main function of the first sealing cap 130 is to seal the second end 102 of the flow channel group to prevent leakage of the heat exchange medium and ensure the normal operation of the liquid cooling system. It maintains the sealing of the system by closing the end of the flow channel group to prevent air or other contaminants from entering the inside of the flow channel.

[0059] In this embodiment, three first blocking caps 130 are integrated into one, which can block three groups of flow channels at the same time. In some embodiments, the first blocking cap 130 can also be separated and correspond to the flow channel group for blocking.

[0060] The diameter of the first flow channel cavity 110 or the second flow channel cavity 120 is greater than 2mm. This size can provide enough space to reduce the resistance when the fluid flows, while ensuring sufficient heat exchange area. Larger diameter helps to improve the flow rate of the fluid, thereby improving the heat transfer efficiency.

[0061] In this embodiment, the cross-sectional area of the first flow channel cavity 110 and the second flow channel cavity 120 is equal. The equal cross-sectional area of the first flow channel cavity 110 and the second flow channel cavity 120 helps to maintain the balance of fluid dynamics, reduce the pressure loss and flow rate variation caused by the size difference of the flow channel, which helps to maintain the stability and efficiency of the liquid cooling system. At the same time, this design also guarantees a certain flexibility, allowing engineers to adjust the size of the flow channel according to the specific heat load and fluid characteristics to optimize the performance of the liquid cooling plate.

[0062] Figure 9 Another angle view of the manifold 200 provided in this embodiment. Figure 10 Another angle view of the manifold 200 provided in this embodiment. Please refer to Figure 9 and Figure 10 In this embodiment, the axial direction of the manifold 200 is perpendicular to the axial direction of the liquid cooling substrate 100, and the manifold 200 includes a first manifold 210 and a second manifold 220, both of which are parallel to the axial direction of the manifold 200. The first manifold 210 is provided with an inlet 211, and the second manifold 220 is provided with an outlet 221.

[0063] Through the above scheme, the manifold 200 includes a first header 210 and a second header 220, both of which are parallel to the axial direction of the manifold 200. This parallel layout helps to evenly distribute and collect fluid, reducing the resistance of fluid flow. The first header 210 is provided with an inlet 211, and the second header 220 is provided with an outlet 221. Such design allows the heat exchange medium (such as cooling liquid) to enter and exit the liquid cooling plate in an orderly manner, ensuring the continuity and uniformity of fluid flow. The axial direction of the manifold 200 is perpendicular to the axial direction of the liquid cooling base plate 100. This design allows the fluid to flow along the first flow channel cavity 110 and the second flow channel cavity 120 parallel to the axial direction of the liquid cooling base plate 100 after entering the liquid cooling plate, thereby achieving more efficient heat exchange. The perpendicular layout helps to distribute the fluid more evenly in the liquid cooling plate, improving the heat exchange efficiency. Since the first flow channel cavity 110 is in communication with the inlet 211, the second flow channel cavity 120 is in communication with the outlet 221, and the first flow channel cavity 110 and the second flow channel cavity 120 are in communication at the second end 102 of the liquid cooling base plate 100, the heat exchange medium enters the first flow channel cavity 110 after entering the inlet 211, then flows into the second flow channel cavity 120, and finally flows out of the outlet 221. This design helps the heat exchange medium form an orderly flow path in the liquid cooling plate, improving the heat exchange efficiency. This design optimizes the layout of the manifold 200 and the liquid cooling base plate 100, as well as the flow path of the heat exchange medium, achieving more efficient heat exchange and more uniform temperature control, improving the heat dissipation efficiency.

[0064] Please refer to Figure 8 , Figure 9 and Figure 10 In this embodiment, the second header 220 is located between the first header 210 and the liquid cooling base plate 100, and the second header 220 has a first hole site 230 with an area matching the cross section of the first end 101. The first end 101 is embedded in the first hole site 230 to connect with the second header 220.

[0065] The second manifold 220 is located between the first manifold 210 and the liquid cooling base 100. This arrangement helps to guide the heat exchange medium from the liquid cooling base 100 to the liquid outlet 221 while maintaining the continuity and uniformity of fluid flow. The second manifold 220 has a first hole site 230 with an area matching the cross-section of the first end 101 of the liquid cooling base 100. This design ensures that the first end 101 of the liquid cooling base 100 can be smoothly embedded in the second manifold 220, forming a tight connection and reducing the risk of fluid leakage. The first end 101 of the liquid cooling base 100 is embedded in the first hole site 230, connecting with the second manifold 220. This embedded connection not only provides structural stability but also helps to effectively transfer heat energy from the liquid cooling base 100 to the second manifold 220, and then to the liquid outlet 221 through the second manifold 220. The heat exchange medium enters the first manifold 210 from the liquid inlet 211, then flows into the flow channel group inside the liquid cooling base 100, after heat exchange, flows out from the second end 102 of the liquid cooling base 100, and then is discharged through the liquid outlet 221 on the second manifold 220. This design makes the fluid form an orderly flow path inside the liquid cooling plate, improving the heat exchange efficiency. Since the second manifold 220 is directly connected to the liquid cooling base 100, it can more effectively collect the heat transferred from the liquid cooling base 100 and transfer it to the liquid outlet 221, thereby improving the overall heat exchange efficiency. By optimizing the connection between the manifold and the liquid cooling base 100, the heat exchange efficiency and structural stability of the liquid cooling plate are improved.

[0066] Please refer to Figure 3 The first flow channel cavity 110 is provided with a first water isolation pipe 300, and the first water isolation pipe 300 passes through from the second manifold 220 to the first manifold 210; the second flow channel cavity 120 is in communication with the second manifold 220.

[0067] Through the above scheme, the first water isolation pipe 300 is equivalent to an intermediate pipe connecting the first manifold 210 and the first flow channel cavity 110. Since the second manifold 220 is in the middle, the heat exchange medium can pass through the first water isolation pipe 300 from the second manifold 220 to the first manifold 210 and be in communication with the first manifold 210, thereby ensuring that the heat exchange medium can flow from the first manifold 210 to the first flow channel cavity 110, realizing orderly distribution of the heat exchange medium during flow, enabling complex fluid flow paths to be realized in limited space, maximizing the use of space while maintaining the compactness of the design. Through the first water isolation pipe 300, the flow of the heat exchange medium is orderly distributed to the first flow channel cavity 110, which helps to maintain the continuity and uniformity of fluid flow, thereby improving the efficiency of the entire liquid cooling system.

[0068] In some embodiments, the first manifold 210 can be located between the second manifold 220 and the liquid cooling substrate 100, and the first manifold 210 has a second hole site on it, the area of the second hole site matches the cross section of the second end, and the first end 101 is embedded in the second hole site to connect with the first manifold 210.

[0069] Through the above scheme, the first manifold 210 is located between the second manifold 220 and the liquid cooling substrate 100. This layout helps to achieve efficient distribution and collection of fluid in the liquid cooling system while maintaining the compactness of the structure. The first manifold 210 has a second hole site on it, and the area of the second hole site matches the cross section of the second end 102 of the liquid cooling substrate 100. This design ensures that the second end 102 of the liquid cooling substrate 100 can be smoothly embedded into the second hole site, and the edges of the second hole site and the second end 102 are welded to achieve a tight connection and communication between the liquid cooling substrate 100 and the manifold 200. The heat exchange medium can flow more quickly from the first manifold 210 to the first flow channel cavity 110, achieving orderly distribution of the heat exchange medium during flow.

[0070] The second flow channel cavity 120 can be provided with a second water separation pipeline, and the second water separation pipeline passes from the first manifold 210 to the second manifold 220; the first flow channel cavity 110 communicates with the first manifold 210.

[0071] Through the above scheme, the second water separation pipeline is equivalent to an intermediate pipeline connecting the second manifold 220 and the second flow channel cavity 120. Since the second manifold 220 and the second flow channel cavity 120 are separated by the first manifold 210, the second water separation pipeline passes from the first manifold 210 to the second manifold 220 and communicates with the second manifold 220, thereby ensuring that the heat exchange medium can flow from the second flow channel cavity 120 to the second manifold 220 and then to the liquid outlet 221. This achieves orderly distribution of the heat exchange medium during flow, allowing complex fluid flow paths to be achieved in a limited space, maximizing the use of space while maintaining the compactness of the design.

[0072] Please refer to Figure 10 and Figure 11 The two ends of the manifold 200 are provided with a second sealing cap 301, which can seal the two ends of the first manifold 210 and the second manifold 220, and is used to seal the first manifold 210 and the second manifold 220.

[0073] Through the above scheme, the main function of the second sealing cap 301 is to seal the two ends of the manifold 200, i.e. there is a sealing cap at the two ends of each manifold, thereby ensuring the sealing of the entire manifold system. The second sealing cap 301 can prevent leakage of the heat exchange medium, ensuring the normal operation and safety of the liquid cooling system.

[0074] Based on the above embodiments, the application further provides a lithium battery, which comprises a battery module and the heat exchange cold plate structure described above. The heat exchange cold plate structure can be arranged between two adjacent battery modules. Since the structure and beneficial effects of the heat exchange cold plate structure have been described in detail in the foregoing embodiments, the application will not be described here again.

[0075] The above embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A heat exchanging cold plate structure, characterized by, The application relates to a heat exchange cold plate structure. The heat exchange cold plate structure comprises a collecting pipe provided with an inlet and an outlet; a liquid cooling base plate has a first end and a second end opposite to the first end along the axial direction of the liquid cooling base plate, the first end is fixed on the collecting pipe; at least one flow channel group is arranged in the liquid cooling base plate, the flow channel group has a first flow channel cavity and a second flow channel cavity, the first flow channel cavity and the second flow channel cavity are parallel to the axial direction of the liquid cooling base plate; the first flow channel cavity is communicated with the inlet, the second flow channel cavity is communicated with the outlet, and the first flow channel cavity and the second flow channel cavity are communicated at the second end so that heat exchange medium entering from the inlet flows into the second flow channel cavity along the first flow channel cavity. The axial direction of the collecting pipe is perpendicular to the axial direction of the liquid cooling base plate, the collecting pipe comprises a first collecting body and a second collecting body, the first collecting body and the second collecting body are parallel to the axial direction of the collecting pipe, the inlet is arranged on the first collecting body, and the outlet is arranged on the second collecting body.

2. The heat exchanging cold plate structure according to claim 1, characterized by, The second collecting body is located between the first collecting body and the liquid cooling base plate, the second collecting body has a first hole site, the area of the first hole site matches the cross section of the first end, and the first end is embedded in the first hole site and connected with the second collecting body.

3. The heat exchanging cold plate structure according to claim 2, characterized by, A first water pipe is arranged on the first flow channel cavity, the first water pipe passes through the second collecting body to the first collecting body, and the second flow channel cavity is communicated with the second collecting body.

4. The heat exchanging cold plate structure according to claim 3, characterized by, The first collecting body is located between the second collecting body and the liquid cooling base plate, the first collecting body has a second hole site, the area of the second hole site matches the cross section of the second end, and the first end is embedded in the second hole site and connected with the first collecting body.

5. The heat exchanging cold plate structure of claim 2, wherein, A second water pipe is arranged on the second flow channel cavity, the second water pipe passes through the first collecting body to the second collecting body, and the first flow channel cavity is communicated with the first collecting body.

6. The heat exchanging cold plate structure of claim 5, wherein, The diameter of the first flow channel cavity or the second flow channel cavity is greater than 2 mm, and the cross-sectional areas of the first flow channel cavity and the second flow channel cavity are equal.

7. The heat exchanging cold plate structure of claim 1, wherein, The heat exchange cold plate structure further comprises a first sealing cap arranged on the second end and used for sealing the second end of the flow channel group.

8. The heat exchanging cold plate structure of claim 1, wherein, The heat exchange cold plate structure further comprises a second sealing cap arranged on the two ends of the first collecting body and the second collecting body and used for sealing the two ends of the first collecting body and the second collecting body.

9. The heat exchanging cold plate structure of claim 2, wherein, The heat exchange cold plate structure is applied to a battery module.

10. A lithium battery, characterized by, ​

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