A water-cooled plate assembly suitable for CO2 automotive batteries

Abstract

This application relates to a water-cooled plate assembly suitable for CO2 automotive batteries, comprising: a first water-cooled plate, which is connected to an air intake assembly; a second water-cooled plate, which is disposed on one side of the first water-cooled plate and connected to the first water-cooled plate via a first pipe; and a third water-cooled plate, which is installed on the side of the second water-cooled plate away from the first water-cooled plate and connected to the second water-cooled plate via a second pipe, and connected to an air outlet assembly. By configuring the battery water-cooled plate assembly as three independent water-cooled plates—the first, second, and third water-cooled plates—and connecting them sequentially in series via the first and second pipes, thermal coupling stress is dispersed. Furthermore, CO2 refrigerant is introduced through the air intake assembly and discharged through the air outlet assembly, achieving multi-stage continuous cooling of the automotive battery pack throughout the process, expanding the cooling coverage area, and improving the heat exchange capacity of the assembly.

Description

Technical Field

[0001] This application relates to the field of thermal management technology for power batteries in new energy vehicles, specifically to a water-cooled plate assembly suitable for CO2 vehicle batteries. Background Technology

[0002] With the rapid development of new energy vehicles, the thermal management system of the power battery is crucial for vehicle safety and driving range. Currently, most mainstream battery thermal management systems use R134a or R1234yf as refrigerants. However, due to increasingly stringent environmental regulations, carbon dioxide (CO2, R744), with its zero ozone depletion potential (ODP) and extremely low global warming potential (GWP), has become the key development direction for future vehicle heat pump systems.

[0003] In related technologies, harmonica tubes or simple stamped flow channel structures are often used as battery water cooling plates, which have weak pressure resistance. CO2 heat pump systems typically operate under transcritical cycles with extremely high operating pressures (high-pressure side pressure can reach over 10MPa, far exceeding the 2-3MPa of traditional R134a systems). Directly applying battery water cooling plates from related technologies to CO2 systems can easily lead to flow channel bulging and deformation, brazing layer cracking, or even bursting and leakage. Summary of the Invention

[0004] This application provides a water-cooled plate assembly suitable for CO2 automotive batteries, which can solve the technical problem that when using harmonica tubes or simple stamped flow channel structures as battery water-cooled plates in CO2 systems, the risk of flow channel bulging and deformation, brazing layer cracking, or even bursting and leakage is very likely to occur.

[0005] In a first aspect, embodiments of this application provide a water-cooled plate assembly suitable for CO2 automotive batteries, comprising: a first water-cooled plate, the first water-cooled plate being connected to an air intake assembly; a second water-cooled plate, the second water-cooled plate being disposed on one side of the first water-cooled plate and connected to the first water-cooled plate via a first pipe; and a third water-cooled plate, the third water-cooled plate being installed on the side of the second water-cooled plate away from the first water-cooled plate and connected to the second water-cooled plate via a second pipe, the third water-cooled plate being connected to an air outlet assembly.

[0006] In conjunction with the first aspect, in one embodiment, the first water-cooled plate includes a first flat tube, with first manifolds connected to opposite ends of the first flat tube, and the first manifolds connected to the air intake assembly; the second water-cooled plate includes a second flat tube, the extension direction of the second flat tube being perpendicular to the extension direction of the first flat tube, with second manifolds connected to opposite ends of the second flat tube, and the second manifold closer to the first water-cooled plate being connected to the first manifold through the first pipeline; the third water-cooled plate includes a third flat tube, the extension direction of the third flat tube being parallel to the extension direction of the first flat tube, with third manifolds connected to opposite ends of the third flat tube, and the third manifold being connected to the second manifold closer to the third water-cooled plate through the second pipeline.

[0007] In conjunction with the first aspect, in one embodiment, the second manifold includes an inlet side pipe and an outlet side pipe. The inlet side pipe is located on the side of the second flat pipe near the first water-cooling plate, and the outlet side pipe is located on the side of the second flat pipe near the third water-cooling plate. A first baffle plate is installed in the middle of the inlet side pipe, and a second baffle plate is installed in the middle of the outlet side pipe.

[0008] In conjunction with the first aspect, in one embodiment, the intake side pipe has two air inlets on its periphery, the two air inlets are spaced apart along the axial direction of the intake side pipe and are symmetrically arranged along the first baffle plate, and the intake side pipe is connected to the first pipeline through the two air inlets; the exhaust side pipe has two exhaust outlets on its periphery, the two exhaust outlets are spaced apart along the axial direction of the exhaust side pipe and are symmetrically arranged along the second baffle plate, the exhaust side pipe is connected to the second pipeline through the two exhaust outlets, and the distance between the two exhaust outlets is greater than the distance between the two air inlets.

[0009] In conjunction with the first aspect, in one embodiment, the first flat tube has a plurality of airflow holes inside, each of the airflow holes extending along the axial direction of the first flat tube, and the plurality of airflow holes being spaced apart along the width direction of the first flat tube.

[0010] In conjunction with the first aspect, in one embodiment, the airflow hole is configured in a figure-eight shape.

[0011] In conjunction with the first aspect, in one embodiment, the CO2 automotive battery water-cooled plate assembly further includes: a fourth water-cooled plate, the fourth water-cooled plate being arranged vertically with the third water-cooled plate, the fourth water-cooled plate including a fourth flat tube extending in the same direction as the third flat tube, the opposite ends of the fourth flat tube being respectively connected to a fourth manifold, and the fourth manifold being connected to the third manifold through a third pipeline.

[0012] In conjunction with the first aspect, in one embodiment, the air intake assembly includes two air intake pipes, and the first pipeline includes two sets of connecting components, with each air intake pipe connected to the first manifold on the corresponding side through one set of connecting components.

[0013] In conjunction with the first aspect, in one embodiment, each group of the connecting components includes: a connecting pipe communicating with the intake pipe; a first pressure plate, one side of which is connected to one end of the connecting pipe, and the other side of which is connected to a first manifold, and the connecting pipe communicating with the first manifold through the first pressure plate; and a second pressure plate, one side of which is connected to the other end of the connecting pipe, and the other side of which is connected to a second manifold, and the connecting pipe communicating with the second manifold through the second pressure plate.

[0014] In conjunction with the first aspect, in one embodiment, the first flat tube, the second flat tube, and the third flat tube are all made of high-strength aluminum alloy material.

[0015] The beneficial effects of the technical solutions provided in this application include: By configuring the battery water-cooling plate assembly into three independent water-cooling plates—a first water-cooling plate, a second water-cooling plate, and a third water-cooling plate—and connecting them in series via a first pipe and a second pipe to disperse thermal coupling stress, and by introducing CO2 refrigerant through the intake assembly, which flows sequentially through the first water-cooling plate, the first pipe, the second water-cooling plate, the second pipe, and the third water-cooling plate before being discharged from the exhaust assembly, multi-stage continuous cooling of the vehicle battery pack is achieved throughout the process. This effectively expands the cooling coverage area, improves the heat exchange capacity of the assembly, and solves the technical problem in related technologies where harmonica tubes or simple stamped flow channel structures are used as battery water-cooling plates in CO2 systems, which are prone to flow channel bulging and deformation, brazing layer cracking, or even bursting and leakage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram of a water-cooled plate assembly suitable for CO2 automotive batteries provided in an embodiment of this application; Figure 2 A top view of the structure of a water-cooled plate assembly for a CO2 automotive battery provided in an embodiment of this application; Figure 3A side view of the structure of a water-cooled plate assembly for a CO2 automotive battery provided in an embodiment of this application; Figure 4 A three-dimensional structural schematic diagram of the second water-cooled plate provided in the embodiments of this application; Figure 5 A partial structural schematic diagram of the second flat tube provided in an embodiment of this application; Figure 6 for Figure 5 Cross-sectional view of AA.

[0018] In the picture: 1. First water-cooled plate; 11. First flat tube; 111. Airflow hole; 12. First manifold; 2. Intake assembly; 21. Intake pipe; 3. Second water-cooled plate; 31. Second flat tube; 32. Second manifold; 321. Inlet side pipe; 3211. First baffle plate; 3212. Inlet; 322. Outlet side pipe; 3221. Second baffle plate; 3222. Outlet; 4. First pipeline; 41. Connecting component; 411. Connecting pipe; 412. First pressure plate; 413. Second pressure plate; 5. Third water-cooled plate; 51. Third flat tube; 52. Third manifold; 6. Second pipeline; 8. Fourth water-cooled plate; 81. Fourth flat tube; 82. Fourth manifold; 9. Third pipeline. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0020] This application provides a water-cooled plate assembly suitable for CO2 automotive batteries, which can solve the technical problem in related technologies where the use of harmonica tubes or simple stamped flow channel structures as battery water-cooled plates in CO2 systems is prone to flow channel bulging and deformation, brazing layer cracking, or even bursting and leakage.

[0021] See Figure 1The image shows a water-cooled plate assembly for a CO2 automotive battery provided in an embodiment of this application. It may include: a first water-cooled plate 1, which is connected to an air intake assembly 2; a second water-cooled plate 3, disposed on one side of the first water-cooled plate 1 and connected to the first water-cooled plate 1 via a first pipe 4; and a third water-cooled plate 5, installed on the side of the second water-cooled plate 3 away from the first water-cooled plate 1, connected to the second water-cooled plate 3 via a second pipe 6, and connected to an air outlet assembly. In other words, the first water-cooled plate 1, the second water-cooled plate 3, and the third water-cooled plate 5 are arranged sequentially to form a multi-stage series heat exchange path for the CO2 refrigerant.

[0022] This embodiment of the application configures the battery water-cooled plate assembly as three independent water-cooled plates: a first water-cooled plate 1, a second water-cooled plate 3, and a third water-cooled plate 5. These plates are connected in series via a first pipe 4 and a second pipe 6 to disperse thermal coupling stress. Furthermore, CO2 refrigerant is introduced through the intake assembly 2, flows sequentially through the first water-cooled plate 1, the first pipe 4, the second water-cooled plate 3, the second pipe 6, and the third water-cooled plate 5, and is then discharged from the exhaust assembly. Specifically, the CO2 refrigerant enters the first water-cooled plate 1 through the intake assembly 2 and completes primary heat exchange. The second water-cooled plate 3 is located on one side of the first water-cooled plate 1, and the second water-cooled plate 3 is interconnected with the first water-cooled plate 1 via the first pipe 4. The refrigerant is introduced from the first water-cooled plate 1 into the second water-cooled plate 3 via the first pipe 4 for further heat exchange. The third water-cooled plate 5 is installed on the side of the second water-cooled plate 3 away from the first water-cooled plate 1. The third water-cooled plate 5 and the second water-cooled plate 3 are interconnected through the second pipe 6. The refrigerant enters the third water-cooled plate 5 from the second water-cooled plate 3 through the second pipe 6 to complete the final heat exchange, and is discharged by the exhaust component connected to the third water-cooled plate 5. The entire process realizes multi-stage continuous cooling of the car battery pack, effectively expanding the cooling coverage area, improving the heat exchange of the assembly, and solving the technical problem that when using harmonica tubes or simple stamped flow channel structures as battery water-cooled plates in CO2 systems, the risk of flow channel bulging and deformation, brazing layer cracking, or even bursting and leakage is very likely to occur.

[0023] See Figure 2 and Figure 4As shown, in some optional embodiments, the first water-cooled plate 1 may include a first flat tube 11, with each end of the first flat tube 11 connected to a first manifold 12, and the first manifold 12 connected to the air intake assembly 2; the second water-cooled plate 3 includes a second flat tube 31, the extension direction of the second flat tube 31 being perpendicular to the extension direction of the first flat tube 11, each end of the second flat tube 31 being connected to a second manifold 32, and the second manifold 32 near the side of the first water-cooled plate 1 being connected to the first manifold 12 through the first pipe 4; the third water-cooled plate 5 includes a third flat tube 51, the extension direction of the third flat tube 51 being parallel to the extension direction of the first flat tube 11, each end of the third flat tube 51 being connected to a third manifold 52, and the third manifold 52 being connected to the second manifold 32 near the side of the third water-cooled plate 5 through the second pipe 6. It should be understood that the first water-cooled plate 1 includes several first flat tubes 11, which are arranged side by side and their opposite ends are respectively connected to the first manifold 12. The first manifold 12 is connected to the air intake assembly 2. CO2 refrigerant enters the first manifold 12 from the air intake assembly 2, is distributed to each of the first flat tubes 11 for parallel flow and heat exchange, and is then collected at the other end of the first manifold 12 and output through the first pipeline 4. The second water-cooled plate 3 includes several second flat tubes 31, which extend perpendicularly to the extension direction of the first flat tubes 11. The second flat tubes 31 are arranged side by side and their opposite ends are respectively connected to the second manifold 32. The second manifold 32 near the first water-cooled plate 1 is connected to the first manifold 12 via the first pipe 4. Refrigerant enters the second manifold 32 on this side via the first pipe 4 and is distributed to each of the second flat tubes 31 for heat exchange. It is then collected by the second manifold 32 near the third water-cooled plate 5 and output via the second pipe 6. The third water-cooled plate 5 includes several third flat tubes 51, whose extension direction is parallel to the extension direction of the first flat tube 11. The third flat tubes 51 are arranged side-by-side, with their opposite ends connected to the third manifold 52. The third manifold 52 is connected to the second manifold 32 near the third water-cooled plate 5 via the second pipe 6. Refrigerant enters the third manifold 52 via the second pipe 6 and is distributed to each of the third flat tubes 51 for heat exchange, finally being discharged by the exhaust assembly. In this embodiment, the first flat tube 11 extends longitudinally, the second flat tube 31 extends laterally, and the third flat tube 51 also extends along a first direction, consistent with the direction of the first flat tube 11. The three water-cooled plates are arranged in a "vertical-horizontal-vertical" spatial cross-arrangement with flat tubes extending in the same direction. Based on the heat exchange of the three plates in series, the CO2 refrigerant undergoes two 90° flow direction turns within the assembly, so that the heat exchange path of the refrigerant fully covers each heat exchange area of ​​the battery pack, effectively improving the spatial uniformity of cooling.

[0024] In some optional embodiments, the second manifold 32 includes an inlet side pipe 321 and an outlet side pipe 322. The inlet side pipe 321 is located on the side of the second flat pipe 31 near the first water-cooled plate 1, and the outlet side pipe 322 is located on the side of the second flat pipe 31 near the third water-cooled plate 5. A first baffle plate 3211 is installed in the middle of the inlet side pipe 321, and a second baffle plate 3221 is installed in the middle of the outlet side pipe 322. That is, the inlet side pipe 321 is located on the side of the second flat pipe 31 near the first water-cooled plate 1, receiving CO2 refrigerant from the first pipe 4 and distributing it to the corresponding second flat pipe 31; the outlet side pipe 322 is located on the side of the second flat pipe 31 near the third water-cooled plate 5, collecting refrigerant from the second flat pipe 31 and outputting it through the second pipe 6. A first baffle plate 3211 is installed in the middle of the inlet-side pipe 321. The first baffle plate 3211 divides the inner cavity of the inlet-side pipe 321 into two axially separated independent sections, allowing the refrigerant entering each section of the inlet-side pipe 321 to be independently distributed to the corresponding second flat pipe 31 without mixing. A second baffle plate 3221 is installed in the middle of the outlet-side pipe 322. The second baffle plate 3221 also divides the inner cavity of the outlet-side pipe 322 into two axially separated sections, allowing the refrigerant flowing out from different heat exchange stages to flow into the corresponding sections of the outlet-side pipe 322 before being output. In this embodiment, considering the high outlet temperature of the CO2 gas cooler, a "dual-inlet, single-outlet" flow channel design is adopted to prevent local hot spots. A diversion is set at the inlet end to ensure that the refrigerant enters each flat pipe evenly and converges at the outlet end. This design reduces flow resistance, adapts to the high flow rate characteristics of CO2 systems, and ensures that the battery pack temperature uniformity is controlled within ±2℃.

[0025] In some optional embodiments, the intake side pipe 321 has two air inlets 3212 on its periphery, the two air inlets 3212 are spaced apart along the axial direction of the intake side pipe 321, and the two air inlets 3212 are symmetrically arranged along the first baffle plate 3211. The intake side pipe 321 is connected to the first pipeline 4 through the two air inlets 3212. The exhaust side pipe 322 has two air outlets 3222 on its periphery, the two air outlets 3222 are spaced apart along the axial direction of the exhaust side pipe 322, and the two air outlets 3222 are symmetrically arranged along the second baffle plate 3221. The exhaust side pipe 322 is connected to the second pipeline 6 through the two air outlets 3222. The distance between the two air outlets 3222 is greater than the distance between the two air inlets 3212. In other words, the intake side pipe 321 has two air inlets 3212 on its circumference. The two air inlets 3212 are arranged axially at intervals along the intake side pipe 321 and are symmetrically arranged with respect to the first baffle plate 3211. They are located on the pipe walls on both sides of the first baffle plate 3211. The intake side pipe 321 is connected to the first pipeline 4 through the two air inlets 3212. The exhaust side pipe 322 has two air outlets 3222 on its circumference. The two air outlets 3222 are arranged axially at intervals along the exhaust side pipe 322 and are symmetrically arranged with respect to the second baffle plate 3221. They are located on the pipe walls on both sides of the second baffle plate 3221. The exhaust side pipe 322 is connected to the second pipeline 6 through the two air outlets 3222. The axial distance between the two air outlets 3222 is greater than the axial distance between the two air inlets 3212. In this embodiment, the CO2 refrigerant undergoes a phase change during heat exchange within the second water-cooled plate 3, with the liquid refrigerant gradually vaporizing and its specific volume significantly increasing. If the distance between the two outlet ports 3222 of the outlet-side pipe 322 is the same as the distance between the two inlet ports 3212 of the inlet-side pipe 321, the increased specific volume of the vaporized refrigerant in the two chambers of the outlet-side pipe 322 leads to an asymmetrical distribution of flow resistance, causing a deviation in the flow rate of the upper and lower flow channels of the second water-cooled plate 3. By setting the axial distance between the two outlet ports 3222 to be greater than the axial distance between the two inlet ports 3212, that is, by appropriately increasing the axial dimension ratio of the two chambers of the outlet-side pipe 322, the flow cross-section of each chamber of the outlet-side pipe 322 is matched with the specific volume change of the refrigerant after the phase change. This compensates for the volume expansion effect caused by the phase change at the structural level, achieves symmetrical matching of flow resistance on both the inlet and outlet sides, ensures uniform distribution of the CO2 refrigerant in each flow channel of the second water-cooled plate 3, and further improves the heat exchange consistency of the assembly.

[0026] In some optional embodiments, the first flat tube 11 has a plurality of airflow holes 111 inside, each airflow hole 111 extending axially along the first flat tube 11, and the plurality of airflow holes 111 are spaced apart along the width direction of the first flat tube 11. That is, the first flat tube 11 has a plurality of airflow holes 111 inside, each airflow hole 111 extending through the first flat tube 11, forming a plurality of independent flow microchannels extending through the flat tube 11 axially. The plurality of airflow holes 111 are arranged sequentially at intervals along the width direction of the first flat tube 11, and adjacent airflow holes 111 are separated by partition walls formed by the flat tube material, dividing the cross-section of the first flat tube 11 into a plurality of mutually independent pressure-bearing chambers. It should be understood that the parallel microchannel structure of multiple airflow holes 111 increases the refrigerant flow velocity within each microchannel, enhancing convective heat transfer and effectively reducing the refrigerant-side heat transfer resistance. Furthermore, the partition walls between each airflow hole 111 divide the cross-section of the first flat tube 11 into multiple independent pressure-bearing chambers. The walls of each chamber collaboratively share the high-pressure CO2 load. Under conditions of equal wall thickness, the equivalent internal pressure borne by the partition walls between each airflow hole 111 is significantly lower than that of a single-chamber large-section flat tube, thus effectively improving the structural pressure-bearing capacity of the first flat tube 11 under high-pressure CO2 conditions without increasing the tube wall thickness. In this embodiment, the second and third flat tubes can have the same structure as the first flat tube 11, i.e., multiple airflow holes are provided inside. Preferably, each flat tube has 10 airflow holes.

[0027] See Figure 5 and Figure 6 As shown, preferably, the airflow hole 111 is shaped like a figure 8. Specifically, the figure 8-shaped cross-section is formed by two circular cross-sections that are tangentially connected along the thickness direction of the first flat tube 11, and multiple figure 8-shaped airflow holes 111 are arranged sequentially along the width direction of the first flat tube 11. Compared to a circular airflow hole with the same cross-sectional area, the perimeter of the figure-eight cross-section airflow hole 111 is larger than that of a circle with the same cross-sectional area. The contact heat exchange area between the refrigerant and the pipe wall is correspondingly increased, which helps to further improve the heat transfer efficiency of the first flat tube 11. In addition, the figure-eight cross-section is composed of two tangent circles, forming a hyperboloid concave structure at the tangent connection. The partition wall between two adjacent airflow holes 111 forms an inward curved support node at the tangent position of the two circles. When CO2 high pressure acts on the inner wall of the airflow hole 111, the curved structure at the tangent point disperses the circumferential stress generated by the pressure to a larger support cross-section, making the stress distribution of the partition wall more uniform and effectively eliminating stress concentration. Without increasing the thickness of the pipe wall and the partition wall, the overall pressure resistance of the first flat tube 11 is further improved, meeting the working pressure requirements of the high-pressure side of the CO2 refrigeration system.

[0028] In some optional embodiments, the CO2 automotive battery water-cooled plate assembly further includes: a fourth water-cooled plate 8, which is arranged vertically with the third water-cooled plate 5. The fourth water-cooled plate includes a fourth flat tube 81, which extends in the same direction as the third flat tube 51. The opposite ends of the fourth flat tube 81 are respectively connected to a fourth manifold 82, and the fourth manifold 82 is connected to the third manifold 52 via a third pipe 9. That is, the fourth water-cooled plate 8 includes several fourth flat tubes 81, which extend in the same direction as the third flat tube 51. The opposite ends of each fourth flat tube 81 are respectively connected to a fourth manifold 82, and the fourth manifold 82 is connected to the third manifold 52 via a third pipe 9. After the CO2 refrigerant flows out from the third water-cooled plate 5, it is introduced into the fourth manifold 82 through the third manifold 52 and the third pipe 9, where it continues to exchange heat and cool the battery pack within the fourth flat tube 81. In this embodiment, the third water-cooled plate 5 and the fourth water-cooled plate 8 are stacked vertically on the right side of the assembly, forming a double-layer heat exchange unit on the right side. They are connected in series via the third pipe 9 and share the same CO2 refrigerant flow path. Compared with the single-layer scheme with only the third water-cooled plate 5, the addition of the fourth water-cooled plate 8 increases the effective heat exchange area of ​​the right-side heat exchange unit by approximately double without increasing the lateral projection size of the assembly. This allows the unit to cover a larger heat exchange area of ​​the battery pack in the vertical stacking direction. Simultaneously, the CO2 refrigerant retains a certain amount of residual cooling capacity after heat exchange via the third water-cooled plate 5. This residual cooling capacity can be fully utilized after being introduced into the fourth water-cooled plate 8 via the third pipe 9, further improving the heat exchange capacity utilization rate of the water-cooled plate assembly.

[0029] In some optional embodiments, the air intake assembly 2 includes two air intake pipes 21, and the first pipeline 4 includes two sets of connecting components 41. Each air intake pipe 21 is connected to the corresponding side of the first manifold 12 through one set of connecting components 41. In this embodiment, the two air intake pipes 21 are respectively connected to both ends of the air intake side pipe 321. CO2 refrigerant is injected into the air intake side pipe 321 from both sides simultaneously, forming a countercurrent flow distribution from both ends to the center in the manifold cavity. Compared with the single-sided single-pipe air intake method, the dual-pipe symmetrical air intake makes the air intake flow distribution more uniform along the entire length of the first manifold 12, effectively reducing the pressure gradient caused by the axial flow of refrigerant when air is intaked from one side, making the air supply at the inlet of each first flat pipe 11 tend to be consistent, eliminating the problem of uneven local heat exchange caused by insufficient air supply from the far-end flat pipe, and significantly improving the overall heat exchange uniformity of the first water-cooled plate 1.

[0030] In some optional embodiments, each group of the communication components 41 may include: a connecting pipe 411, which is connected to the air intake pipe 21; a first pressure plate 412, one side of which is connected to one end of the connecting pipe 411, and the other side of which is connected to the first manifold 12, and the connecting pipe 411 and the first manifold 12 are connected through the first pressure plate 412; and a second pressure plate 413, one side of which is connected to the other end of the connecting pipe 411, and the other side of which is connected to the second manifold 32, and the connecting pipe 411 and the second manifold 32 are connected through the second pressure plate 413. In this embodiment, the connecting pipe 411 extends along the arrangement direction of the first manifold 12 and the second manifold 32. The first pressure plate 412 clamps and presses between one end face of the connecting pipe 411 and the corresponding interface of the first manifold 12, forming a press-sealed connection to seal the connection between the connecting pipe 411 and the first manifold 12, preventing leakage of high-pressure CO2 medium. The second pressure plate 413 clamps and presses between the other end face of the connecting pipe 411 and the corresponding interface of the second manifold 32 in the same manner, forming the same press-sealed connection. This structure allows the connecting pipe 411 to simultaneously bridge the first manifold 12 and the second manifold 32. After the CO2 refrigerant enters the connecting pipe 411 through the inlet pipe 21, it enters the first manifold 12 through the first pressure plate 412 and the second manifold 32 through the second pressure plate 413, respectively, realizing a compact pipeline scheme in which one inlet pipe supplies refrigerant to two manifolds simultaneously through a set of connecting components 41. In some other embodiments, the connection between the second pipe 6 and the third pipe 9 and the corresponding cold water plate can also be achieved by installing pressure plates. Each inlet pressure plate and outlet pressure plate adopts a high-strength connection method, and is equipped with a reinforcing collar and an anti-pull-out structure to prevent the interface from falling off due to high pressure fluid impact.

[0031] Preferably, the first flat tube 11, the second flat tube 31, and the third flat tube 51 are all made of high-strength aluminum alloy. It should be understood that the fourth flat tube can also be made of high-strength aluminum alloy. Each flat tube 3 is extruded from high-strength aluminum alloy, with a wall thickness of 0.5-0.8 mm. Furthermore, each manifold can have a wall thickness of 2.3-2.5 mm, increasing the pressure resistance of each water-cooling plate to over 15 MPa, effectively resisting plate deformation caused by internal high pressure, and fully meeting the safe operation requirements of the CO2 heat pump system. In this embodiment, aluminum alloy brazing is used, resulting in a lightweight overall structure that meets automotive lightweighting requirements, and the integrated sealing structure offers high reliability.

[0032] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0033] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A CO2 automobile battery water cooling plate assembly suitable for use, characterized by, It includes: The first water-cooled plate (1) is connected to the air intake assembly (2); The second water-cooled plate (3) is disposed on one side of the first water-cooled plate (1), and the second water-cooled plate (3) is connected to the first water-cooled plate (1) through the first pipe (4); The third water-cooled plate (5) is installed on the side of the second water-cooled plate (3) away from the first water-cooled plate (1). The third water-cooled plate (5) is connected to the second water-cooled plate (3) through the second pipe (6). The third water-cooled plate (5) is connected to an air outlet component.

2. The water-cooled plate assembly for CO2 automotive batteries as described in claim 1, characterized in that: The first water-cooled plate (1) includes a first flat tube (11), and the two ends of the first flat tube (11) are respectively connected to a first manifold (12), and the first manifold (12) is connected to the air intake assembly (2); The second water-cooled plate (3) includes a second flat tube (31), the extension direction of the second flat tube (31) is perpendicular to the extension direction of the first flat tube (11), the two ends of the second flat tube (31) are respectively connected to a second manifold (32), and the second manifold (32) near the first water-cooled plate (1) is connected to the first manifold (12) through the first pipeline (4); The third water-cooled plate (5) includes a third flat tube (51), the extension direction of the third flat tube (51) is parallel to the extension direction of the first flat tube (11), and the opposite ends of the third flat tube (51) are respectively connected to a third manifold (52). The third manifold (52) is connected to the second manifold (32) near the side of the third water-cooled plate (5) through the second pipeline (6).

3. The water-cooled plate assembly for CO2 automotive batteries as described in claim 2, characterized in that: The second manifold (32) includes an inlet side pipe (321) and an outlet side pipe (322). The inlet side pipe (321) is located on the side of the second flat pipe (31) near the first water-cooled plate (1), and the outlet side pipe (322) is located on the side of the second flat pipe (31) near the third water-cooled plate (5). A first baffle plate (3211) is installed in the middle of the inlet side pipe (321), and a second baffle plate (3221) is installed in the middle of the outlet side pipe (322).

4. The water-cooled plate assembly for CO2 automotive batteries as described in claim 3, characterized in that: The intake side pipe (321) has two air inlets (3212) on its periphery. The two air inlets (3212) are spaced apart along the axial direction of the intake side pipe (321) and are symmetrically arranged along the first baffle plate (3211). The intake side pipe (321) is connected to the first pipeline (4) through the two air inlets (3212). The exhaust side pipe (322) has two exhaust ports (3222) on its periphery. The two exhaust ports (3222) are spaced apart along the axial direction of the exhaust side pipe (322) and are symmetrically arranged along the second baffle plate (3221). The exhaust side pipe (322) is connected to the second pipeline (6) through the two exhaust ports (3222). The distance between the two exhaust ports (3222) is greater than the distance between the two air inlets (3212).

5. The water-cooled plate assembly for CO2 automotive batteries as described in claim 2, characterized in that: The first flat tube (11) has a plurality of airflow holes (111) inside, each of the airflow holes (111) extending along the axial direction of the first flat tube (11), and the plurality of airflow holes (111) are spaced apart along the width direction of the first flat tube (11).

6. The water-cooled plate assembly for CO2 automotive batteries as described in claim 5, characterized in that: The airflow hole (111) is designed in the shape of an 8.

7. The water cooling plate assembly for CO2 automobile battery of claim 2, wherein, The water-cooled plate assembly suitable for CO2 automotive batteries also includes: The fourth water-cooled plate (8) is arranged vertically with the third water-cooled plate (5). The fourth water-cooled plate includes a fourth flat tube (81). The fourth flat tube (81) extends in the same direction as the third flat tube (51). The opposite ends of the fourth flat tube (81) are respectively connected to a fourth manifold (82). The fourth manifold (82) and the third manifold (52) are connected through a third pipeline (9).

8. The water-cooled plate assembly for CO2 automotive batteries as described in claim 2, characterized in that: The intake assembly (2) includes two intake pipes (21), and the first pipeline (4) includes two sets of connecting components (41). Each intake pipe (21) is connected to the first manifold (12) on the corresponding side through a set of connecting components (41).

9. The water cooling plate assembly for CO2 automobile battery of claim 8, wherein, Each of the connected components (41) includes: Connecting pipe (411), connecting pipe (411) is connected to the air intake pipe (21); A first pressure plate (412) is connected to one end of the connecting pipe (411) on one side, and the other side of the first pressure plate (412) is connected to the first manifold (12), and the connecting pipe (411) and the first manifold (12) are connected through the first pressure plate (412). The second pressure plate (413) has one side connected to the other end of the connecting pipe (411) and the other side connected to the second manifold (32). The connecting pipe (411) and the second manifold (32) are connected through the second pressure plate (413).

10. The water-cooled plate assembly for CO2 automotive batteries as described in claim 2, characterized in that: The first flat tube (11), the second flat tube (31) and the third flat tube (51) are all made of high-strength aluminum alloy.

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