Thermal management device and battery pack

Abstract

This application provides a thermal management device and a battery pack, belonging to the field of battery technology. The thermal management device includes an outlet main pipe, an inlet main pipe, a thermal management plate, a first intermediate pipe, and a second intermediate pipe. Multiple thermal management plates are arranged parallel to each other, and each thermal management plate has a flow channel. The first and second intermediate pipes are staggered with the thermal management plates. Both ends of the first intermediate pipe are connected to one end of a flow channel of a thermal management plate, and both ends of the second intermediate pipe are connected to the other end of a flow channel of a thermal management plate. The outlet main pipe is connected to a portion of a flow channel near the first intermediate pipe, and the inlet main pipe is connected to a portion of a flow channel near the second intermediate pipe. Through the above solution, this application integrates a three-way function into the thermal management plate, thereby eliminating the need for a three-way pipe, which facilitates control of the space occupied by the pipes and improves the compactness of the pipe structure. Thus, while ensuring temperature control capabilities, it helps to reduce the size of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a thermal management device and a battery pack. Background Technology

[0002] In related technologies, a battery pack includes a battery box and battery modules and a thermal management device disposed within the battery box. The battery module includes multiple electrically connected cells. The thermal management device includes a thermal management plate thermally coupled to the cells, an inlet pipe, and an outlet pipe. The thermal management plate has flow channels for the flow of heat exchange medium. The heat exchange medium flows sequentially through the inlet pipe, the thermal management plate, and the outlet pipe. The heat exchange medium discharged from the outlet pipe has its temperature regulated by a temperature control module before flowing back to the inlet pipe. This cycle repeats continuously to achieve temperature management of the cells, ensuring that the cells remain within their normal operating temperature range.

[0003] The thermal management board can be configured with a corresponding layout structure based on the battery module layout. For example, if multiple battery modules are stacked along the Z-axis, multiple thermal management boards can be stacked to ensure that each battery module has a thermal management board. Adjacent thermal management boards are connected by an intermediate pipe to achieve heat exchange medium conduction between adjacent thermal management boards.

[0004] Currently, due to the accelerated electrification of vehicles, the heat density of batteries, motors, and electronic control systems has significantly increased. As battery energy density and fast charging rates continue to improve, the performance requirements for battery pack thermal management systems are constantly rising. Meanwhile, vehicles have consistently demanded miniaturization of battery packs. Therefore, how to reduce battery pack size while maintaining effective temperature control is the main problem this application aims to solve. Summary of the Invention

[0005] This application provides a thermal management device and a battery pack to at least solve the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a thermal management device is provided, comprising a liquid outlet main pipe, a liquid inlet main pipe, a plurality of thermal management plates, a plurality of first intermediate pipes, and a plurality of second intermediate pipes; the plurality of thermal management plates are parallel to each other and arranged sequentially along their own thickness direction, each thermal management plate having a flow channel; the plurality of first intermediate pipes and the plurality of second intermediate pipes are respectively staggered with the plurality of thermal management plates, the two ends of the first intermediate pipes are respectively connected to one end of the flow channel of a thermal management plate, and the two ends of the second intermediate pipes are respectively connected to the other end of the flow channel of a thermal management plate; the liquid outlet main pipe is connected to a portion of a flow channel near the first intermediate pipe; the liquid inlet main pipe is connected to a portion of a flow channel near the second intermediate pipe. In this way, by staggering the first intermediate pipe, the second intermediate pipe, and the heat management plate, and directly connecting the first and second intermediate pipes to the heat management plate, the heat management plate integrates a three-way function. This allows the heat management plate to both receive heat exchange medium and supply heat exchange medium into its own flow channel, while also allowing heat exchange medium to be input to the next heat management plate. This eliminates the need for a separate three-way pipe arrangement, controls the space occupied by the piping, and improves the compactness of the piping structure. Thus, while ensuring temperature control capabilities, it also helps to reduce the size of the battery pack.

[0007] Optionally, the thermal management board has a first ear plate with a first inner cavity. A first intermediate tube is connected to the first ear plate and communicates with one end of the flow channel through the first inner cavity. In this way, by setting the first ear plate to connect the first intermediate tube, the connection position between the first intermediate tube and the thermal management board can be avoided from the battery module, improving the compatibility between the thermal management board and the battery module and improving assembly efficiency.

[0008] Optionally, the thermal management board has a second ear plate with a second inner cavity. The second intermediate tube is connected to the second ear plate and communicates with the other end of the flow channel through the second inner cavity. In this way, by setting the second ear plate to connect the second intermediate tube, the connection position between the second intermediate tube and the thermal management board can be avoided from the battery module, improving the compatibility between the thermal management board and the battery module and improving assembly efficiency.

[0009] Optionally, the thermal management plate has a third ear plate with a third inner cavity. The liquid outlet main pipe is connected to the third ear plate and communicates with the portion of the flow channel near the first intermediate pipe through the third inner cavity. In this way, by setting the third ear plate to connect to the liquid outlet main pipe, the connection position between the liquid outlet main pipe and the thermal management plate can be avoided from the battery module, improving the compatibility between the thermal management plate and the battery module and improving assembly efficiency.

[0010] Optionally, the thermal management board has a fourth ear plate with a fourth inner cavity. The liquid inlet main pipe is connected to the fourth ear plate and communicates with the portion of the flow channel near the second intermediate tube through the fourth inner cavity. Thus, by providing the fourth ear plate to connect to the liquid inlet main pipe, the connection point between the liquid inlet main pipe and the thermal management board can be avoided from the battery module, improving the compatibility between the thermal management board and the battery module and increasing assembly efficiency.

[0011] Optionally, the inlet and outlet main pipes are connected to the flow channels of the same thermal management plate. This makes the thermal management device structurally regular, facilitates assembly, and improves assembly efficiency.

[0012] Optionally, at least one of the first intermediate tube and the second intermediate tube is a telescopic tube. In this way, by making at least one of the first intermediate tube and the second intermediate tube a telescopic tube, the length dimension can be adjusted to compensate for or absorb dimensional tolerances, so that the length dimension is consistent with the spacing dimension between the heat management plates. This improves the compatibility of the first intermediate tube and the second intermediate tube with the installation space of two adjacent heat management plates, reduces the assembly difficulty, and improves the assembly efficiency.

[0013] Optionally, the telescopic tube includes a first tube, a second tube, and a sealing assembly; the first tube has a socket; one end of the second tube is inserted into the socket; the sealing assembly is annularly disposed between the first tube and the second tube; wherein, the end of the first tube opposite to the second tube is connected to a heat management plate and communicates with a corresponding flow channel; the end of the second tube opposite to the first tube is connected to another heat management plate and communicates with a corresponding flow channel. Thus, by setting the first tube and the second tube to be inserted together and configuring the sealing assembly, the sealing performance of the mating parts between the first tube and the second tube can be effectively ensured, and the insertion depth of the first tube and the second tube can be adjusted to adjust the length of the telescopic tube, thereby compensating for or absorbing dimensional tolerances. This simplifies the structure of the telescopic tube, facilitates length adjustment, and improves economy and assembly efficiency.

[0014] Optionally, the sealing assembly includes a first sealing ring, a retaining ring, and a compression ring. The first sealing ring is disposed between the first pipe and the second pipe. The retaining ring is disposed between the first pipe and the second pipe and connected to the first pipe. The compression ring is disposed between the first pipe and the second pipe, with both ends of the compression ring abutting against the retaining ring and the first sealing ring, respectively. The compression ring is configured to press the first sealing ring against the bottom surface of the socket under the limiting position of the retaining ring. Thus, by limiting the compression ring with the retaining ring, the compression ring presses the first sealing ring against the bottom surface of the socket, thereby improving the positional stability of the first sealing ring, preventing axial movement of the first sealing ring, effectively improving the smoothness of the movement of the second pipe relative to the first pipe, and improving assembly efficiency.

[0015] Optionally, a groove is provided on the side of the socket, and a retaining block is provided on the outer circumference of the retaining ring, with the retaining block located within the groove. In this way, the groove and the retaining block cooperate to ensure the axial positional stability of the retaining ring relative to the first pipe, and also to make the fit between the retaining ring and the first pipe simple and easy to form.

[0016] Optionally, the end face of the retaining block facing the compression ring is a wedge face; in this way, the retaining ring can be guided to the socket by the wedge face, and the resistance of the initial retaining ring is reduced, thereby improving the smoothness and efficiency of the retaining ring installation in the socket. And / or, there are multiple slots and blocks, with each slot and block corresponding to the other, and each block located in the corresponding slot; in this way, the mating area between the retaining ring and the first tube can be increased, thereby increasing the limiting effect of the first tube on the retaining ring and improving the stress state of the mating part between the retaining ring and the first tube, thus improving the durability of the telescopic tube.

[0017] Optionally, a first positioning structure is provided on the end face of the retaining ring away from the compression ring, and the first positioning structure is positioned opposite to the retaining block along the axial direction of the retaining ring; a second positioning structure is provided on the end face of the first tube near the socket, and the second positioning structure is positioned opposite to the retaining groove along the axial direction of the first tube; wherein, the first positioning structure is positioned radially opposite to the second positioning structure. In this way, the relative position between the retaining block and the retaining groove can be determined by the relative position between the first and second positioning structures, thereby improving the accuracy of the fit between the retaining block and the retaining groove and increasing assembly efficiency.

[0018] Optionally, along the axial direction of the retaining ring, the inner circumferential surface of the retaining ring includes a first conical surface and a second conical surface connected in sequence. The first conical surface is located at the end of the second conical surface opposite to the compression ring. The taper of the first conical surface is greater than that of the second conical surface, and the diameters of both the first and second conical surfaces decrease sequentially from the retaining ring towards the compression ring. In this way, the larger taper of the first conical surface guides the insertion of the second tube, improving the smoothness of the insertion between the first and second tubes. Simultaneously, the smaller taper of the second conical surface reduces the clearance between the retaining ring and the second tube, thereby improving the dustproof performance of the retaining ring and effectively preventing dust and other impurities from entering the retaining ring.

[0019] Optionally, there are two first sealing rings, arranged sequentially along the axial direction of the first tube. This increases the sealing surface area between the first and second tubes, improving the sealing effect and thus enhancing the reliability of the thermal management device.

[0020] Optionally, the first sealing ring is an O-ring, and the thermal management device also includes a spacer ring, which is disposed between the first pipe and the second pipe, and is located between the two first sealing rings. In this way, the sealing effect between the first pipe and the second pipe can be good, and the spacer ring can effectively isolate the two first sealing rings, preventing one of the two first sealing rings from being squeezed to the inside or outside of the other, and ensuring that each first sealing ring is in an effective sealing position.

[0021] Optionally, the first pipe includes a first sub-pipe and a second sub-pipe connected in sequence. The outer diameter of the first sub-pipe is larger than the outer diameter of the second sub-pipe; the inner diameter of the first sub-pipe is larger than the inner diameter of the second sub-pipe, thus defining a socket. The bottom surface of the socket is the end face of the second sub-pipe facing the first sub-pipe, and the end of the second sub-pipe away from the first sub-pipe is connected to the corresponding heat management plate. In this way, the socket can be defined, the wall thickness of the first pipe is uniform, and the amount of material used in the first pipe can be controlled.

[0022] Optionally, multiple reinforcing ribs are provided at the connection between the first sub-tube and the second sub-tube. These reinforcing ribs are distributed sequentially along the circumference of the first sub-tube and are located on the outer wall of the first tube. In this way, the structural strength of the connection between the first and second sub-tubes can be enhanced by the reinforcing ribs, thereby improving the reliability of the first tube and thus the reliability of the telescopic tube.

[0023] Optionally, the thermal management device further includes a first quick-connect fitting, with each end of the first intermediate tube connected to a corresponding thermal management plate via a first quick-connect fitting; thus, when connecting the first intermediate tube to the thermal management plate, the connection efficiency between the first intermediate tube and the thermal management plate can be improved through the first quick-connect fitting, thereby improving assembly efficiency. And / or, the thermal management device further includes a second quick-connect fitting, with each end of the second intermediate tube connected to a corresponding thermal management plate via a second quick-connect fitting; thus, when connecting the second intermediate tube to the thermal management plate, the connection efficiency between the second intermediate tube and the thermal management plate can be improved through the second quick-connect fitting, thereby improving assembly efficiency.

[0024] Optionally, the thermal management device also includes an exhaust valve, which is located on the uppermost of the multiple thermal management plates and communicates with the flow channel of the corresponding thermal management plate. Thus, by providing the exhaust valve, gas within the flow channel can be discharged, reducing the obstruction of heat exchange by the gas within the flow channel and improving the heat exchange efficiency of the thermal management device.

[0025] Optionally, the thermal management board connected to the exhaust valve has a first ear plate with a first inner cavity. The exhaust valve is disposed on the first ear plate, and the air inlet of the exhaust valve communicates with the flow channel through the first inner cavity. Thus, by placing the exhaust valve on the first ear plate at one end of the thermal management board, gas in the flow channel can be discharged through the exhaust valve, while avoiding the exhaust valve occupying the surface of the thermal management board. This improves the compatibility between the thermal management board and the battery module, allowing the surface of the thermal management board to be focused on the temperature management of the battery module, thereby improving assembly efficiency.

[0026] Optionally, the thermal management device further includes a connecting ring and a second sealing ring. The connecting ring is sleeved on the vent valve, and the second sealing ring is annularly disposed on the vent valve, located at the end of the connecting ring opposite to the first lug. The second sealing ring is configured to clamp between the connecting ring and the battery pack wall. In this way, the second sealing ring can seal the opposing surfaces between the connecting ring and the battery pack wall, thereby improving the internal sealing of the battery pack and ensuring that the battery pack's protection level meets requirements.

[0027] Optionally, a through hole is provided on the connecting ring, configured to allow the shank of the bolt connecting to the casing wall to pass through. In this way, the bolt connection to the casing wall generates a compressive force that presses against the second sealing ring, ensuring the reliability of the second sealing ring under pressure and thus guaranteeing the sealing effect within the battery pack.

[0028] Optionally, the outer circumference of the connecting ring is elliptical, and the through hole is positioned opposite to the major axis of the ellipse along the axial direction of the connecting ring. This allows for sufficient space on the connecting ring to accommodate the through hole while controlling the local radial dimensions of the connecting ring, thus reducing the space occupied by the connecting ring, minimizing interference between the connecting ring and other components within the battery pack, and improving assembly efficiency.

[0029] Optionally, a positioning platform is provided on the side of the connecting ring opposite to the first ear plate, and the second sealing ring is fitted onto the positioning platform. In this way, during assembly, the second sealing ring can be initially positioned by the positioning platform to prevent the second sealing ring from falling off, thereby improving assembly efficiency.

[0030] Optionally, the first ear plate is parallel to the surface of the heat management plate. This allows the first ear plate to be positioned by the main body of the heat management plate during assembly, reducing the difficulty of molding the heat management plate and improving molding efficiency.

[0031] Optionally, the vent valve is disposed on one surface of the first ear plate; thus, the vent valve is arranged along the thickness direction of the first ear plate, thereby making the thermal management plate applicable to a battery pack having installation space in the thickness direction of the first ear plate; or, the vent valve is disposed at the end of the first ear plate; thus, the vent valve is arranged in a direction parallel to the width of the first ear plate, thereby making the thermal management plate applicable to a battery pack having installation space in a direction other than the thickness of the first ear plate.

[0032] According to a second aspect of this application, a battery pack is provided, comprising battery modules and the aforementioned thermal management device; multiple battery modules are arranged alternately with multiple thermal management plates, each battery module contacting an adjacent thermal management plate. Thus, by alternating the first intermediate pipe, the second intermediate pipe, and the thermal management plates, and by directly connecting the first and second intermediate pipes to the thermal management plates, the thermal management plates integrate a three-way function. This allows the thermal management plates to both receive heat exchange medium, supply heat exchange medium to their own flow channels, and input heat exchange medium to the next thermal management plate, thereby eliminating the need for a three-way pipe arrangement, controlling the space occupied by the pipes, and improving the compactness of the pipe structure. In this way, while ensuring temperature control capabilities, the battery pack volume is reduced.

[0033] In the thermal management device of this application embodiment, by staggering the first intermediate pipe, the second intermediate pipe, and the thermal management plate, and directly connecting the first and second intermediate pipes to the thermal management plate, the thermal management plate integrates a three-way function. This allows the thermal management plate to both receive heat exchange medium and supply heat exchange medium into its own flow channel, while also allowing heat exchange medium to be input to the next thermal management plate. This eliminates the need for a three-way pipe arrangement, controls the space occupied by the pipes, and improves the compactness of the pipe structure. Thus, while ensuring temperature control capabilities, it is beneficial to reduce the size of the battery pack.

[0034] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0035] 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 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.

[0036] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0037] Figure 1 This is a schematic diagram of the structure of the battery pack provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of the thermal management device provided in an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the first intermediate tube and the heat management plate in an exemplary embodiment of this disclosure; Figure 4 This is a schematic diagram of the second intermediate tube and the heat management plate in an exemplary embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of the telescopic tube provided in an exemplary embodiment of this application; Figure 6 yes Figure 5 Sectional view of AA; Figure 7 yes Figure 6 Enlarged schematic diagram of part B in the middle; Figure 8 This is a schematic diagram of the structure of the first tube provided in an exemplary embodiment of this application; Figure 9 This is a schematic diagram of the clasp structure provided in an exemplary embodiment of this application; Figure 10 This is a schematic diagram of an exhaust valve installation provided in an exemplary embodiment of this application; Figure 11 yes Figure 10 A partial structural schematic diagram of the thermal management plate is shown. Figure 12 This is a schematic diagram of another exhaust valve installation provided in an exemplary embodiment of this application; Figure 13 yes Figure 12 A partial structural schematic diagram of the thermal management plate is shown. Figure 14 This is a schematic diagram of the exhaust valve and the box wall provided in an exemplary embodiment of this application.

[0038] Explanation of reference numerals in the attached figures: 1000-battery pack; 100 - Thermal management device; 10-Expansion joint; 11-First pipe; 111-First sub-pipe; 112-Second sub-pipe; 113-Socket; 114-Slot; 115-Second positioning structure; 116-Reinforcing rib; 117-Limiting groove; 12-Second tube; 13-First sealing ring; 14-Snap ring; 141-First conical surface; 142-Second conical surface; 143-Snap block; 144-Wedge surface; 145-First positioning structure; 15-Crushing ring; 16-Spacer ring; 171-First quick-insertion connector; 172-Second quick-insertion connector; 173-Limiting block; 21-Box body; 22-Box cover; 23-Battery module; 24-Thermal management plate; 241-First ear plate; 242-Second ear plate; 243-First inner cavity; 244-Second inner cavity; 245-Flow channel; 246-Third inner cavity; 247-Fourth inner cavity; 248-Third ear plate; 249-Fourth ear plate; 251 - Liquid inlet main pipe; 252 - Liquid outlet main pipe.

[0039] 33-Exhaust valve; 34-Connecting ring; 341-Through hole; 342-Positioning platform; 35-Second sealing ring; 36-Cap; 41 - Box wall; 42 - Bolt; 51 - First intermediate tube; 52 - Second intermediate tube. Detailed Implementation

[0040] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0041] Before introducing the thermal management device and battery pack provided in the embodiments of this application, the relevant technologies of this application will be introduced first.

[0042] In related technologies, a battery pack includes battery modules and a thermal management device. Multiple battery modules can be stacked along the Z-axis. Correspondingly, the thermal management device includes multiple thermal management plates, which are staggered with the battery modules along the Z-axis to manage the temperature of each battery module. Adjacent thermal management plates are connected by an intermediate pipe to facilitate the flow of heat exchange medium between them. Since the intermediate pipe needs to receive the heat exchange medium and connect to the currently adjacent thermal management plate and the next thermal management plate, a T-junction is installed on the intermediate pipe. The three ports of the T-junction serve as the receiving port, the port connecting to the adjacent thermal management plate, and the port connecting to the next thermal management plate, respectively. This not only results in the pipes connecting the thermal management plates occupying a significant amount of Z-axis space, but also necessitates placing the pipes at one end of the battery module to avoid affecting heat exchange between the battery module and the thermal management plates, thus occupying space in the X or Y-axis. The Z-axis typically corresponds to the vertical direction of the vehicle, the X-axis to the front-to-back direction, and the Y-axis to the left-to-right direction.

[0043] Based on this, embodiments of this application provide a thermal management device and a battery pack, which, while realizing the three-way function, controls the space occupied by the pipes of the thermal management device, improves the compactness of the pipe structure, and thus helps to reduce the size of the battery pack while ensuring temperature control capability.

[0044] The following combination Figures 1 to 14 The present application provides a detailed description of a thermal management device 100 and a battery pack 1000 provided in the embodiments of this application.

[0045] Please see Figure 1This application provides a battery pack 1000. The battery pack 1000 includes battery modules 23 and a thermal management device 100. Multiple battery modules 23 are distributed alternately with multiple thermal management plates 24 of the thermal management device 100. Each battery module 23 is in contact with an adjacent thermal management plate 24.

[0046] It is understood that the battery pack 1000 mentioned in the embodiments of this application refers to a single physical module that includes multiple battery cells to provide higher voltage and capacity than a single battery cell.

[0047] It is understood that the battery module 23 includes multiple electrically connected battery cells. The battery cells can be secondary or primary batteries, and can also be lithium-sulfur, sodium-ion, or magnesium-ion batteries, but are not limited to these. The battery cells can be cylindrical, flat, cuboid, or other shapes.

[0048] Specifically, the battery pack 1000 also includes a housing 21 for housing multiple battery cells. The housing 21 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0049] Specifically, the battery pack 1000 also includes a cover 22, which closes to the housing 21 to seal the inner cavity of the housing 21 and provide protection for the individual battery cells.

[0050] For example, multiple battery modules 23 are arranged sequentially along the Z direction. Each battery module 23 has two ends along the Z direction in contact with a thermal management plate 24 to achieve thermal coupling, thereby managing the temperature of the battery module 23 through the thermal management plate 24, so that the battery module 23 operates within a suitable temperature range.

[0051] It is understandable that the battery pack 1000 may also include a battery management system to monitor the voltage and temperature information of individual battery cells.

[0052] The battery pack 1000 can be applied to a variety of electrical devices, including but not limited to vehicles, ships, or aircraft. Specifically, the electrical devices can be, but are not limited to, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. For example, the battery pack 1000 can be applied to commercial vehicles.

[0053] Please see Figure 2 , Figure 3 and Figure 4This application provides a thermal management device 100. The thermal management device 100 includes a liquid outlet main pipe 252, a liquid inlet main pipe 251, multiple thermal management plates 24, multiple first intermediate pipes 51, and multiple second intermediate pipes 52. The multiple thermal management plates 24 are parallel to each other and arranged sequentially along their thickness direction. Each thermal management plate 24 has a flow channel 245. The multiple first intermediate pipes 51 and the multiple second intermediate pipes 52 are staggered with the multiple thermal management plates 24. Both ends of the first intermediate pipes 51 are connected to one end of the flow channel 245 of a thermal management plate 24. Both ends of the second intermediate pipes 52 are connected to the other end of the flow channel 245 of a thermal management plate 24. The liquid outlet main pipe 252 is connected to a portion of the flow channel 245 near the first intermediate pipe 51. The liquid inlet main pipe 251 is connected to a portion of the flow channel 245 near the second intermediate pipe 52.

[0054] It is understood that the inlet pipe 251 and the outlet pipe 252 can be connected to the two ends of the same flow channel 245 respectively, or they can be connected to the ends of different flow channels 245.

[0055] It is understandable that the spacing between multiple thermal management plates 24 is determined by the spacing between multiple battery modules 23.

[0056] It is understood that a first intermediate pipe 51 and a second intermediate pipe 52 are provided between any two adjacent thermal management plates 24.

[0057] It is understood that the first intermediate pipe 51, the second intermediate pipe 52, the inlet main pipe 251, and the outlet main pipe 252 can be welded to, plugged into, and fitted with sealing components or connected via pipe joints to the corresponding management plates. This embodiment does not limit this; the specific configuration depends on the application scenario.

[0058] It is understandable that the arrangement direction of the multiple thermal management plates 24 is the same as the arrangement direction of the multiple battery modules 23.

[0059] Specifically, multiple battery modules 23 are arranged along the Z-direction, and multiple thermal management boards 24 are also arranged along the Z-direction.

[0060] It is understood that the flow channel 245, the first intermediate pipe 51, the second intermediate pipe 52, the liquid inlet main pipe 251, and the liquid outlet main pipe 252 are all used for the flow of heat exchange medium. The heat exchange medium includes, but is not limited to, deionized water, anhydrous ethanol, etc.

[0061] It is understood that the thermal management device 100 also includes a compressor, condenser, heat exchanger, expansion valve, heating module (e.g., thermistor), etc.

[0062] In this embodiment, by staggering the first intermediate pipe 51, the second intermediate pipe 52, and the heat management plate 24, and by directly connecting the first intermediate pipe 51 and the second intermediate pipe 52 to the heat management plate 24, the heat management plate 24 integrates a three-way function. This allows the heat management plate 24 to both receive heat exchange medium, supply heat exchange medium to its own flow channel 245, and input heat exchange medium to the next heat management plate 24. This eliminates the need for a three-way pipe arrangement, controls the space occupied by the pipes, and improves the compactness of the pipe structure. Thus, while ensuring temperature control capabilities, it helps to reduce the volume of the battery pack 1000.

[0063] In addition, in this embodiment, multiple thermal management plates 24 are connected in parallel through the first intermediate tube 51 and the second intermediate tube 52, which can effectively reduce the flow resistance of the thermal management device 100 and enable the thermal management plates 24 to perform thermal management on the battery modules 23 located on both sides of them, thereby increasing the effective heat exchange area of ​​the thermal management plates 24 and improving the thermal management efficiency of the battery pack 1000.

[0064] Please see Figure 3 In some embodiments, the thermal management plate 24 has a first ear plate 241. The first ear plate 241 has a first inner cavity 243, and the first intermediate tube 51 is connected to the first ear plate 241 and communicates with one end of the flow channel 245 through the first inner cavity 243. In this way, by setting the first ear plate 241 to connect the first intermediate tube 51, the connection position between the first intermediate tube 51 and the thermal management plate 24 can be avoided from the battery module 23, thereby improving the compatibility between the thermal management plate 24 and the battery module 23 and improving assembly efficiency.

[0065] Specifically, the edge of the thermal management plate 24 protrudes outward to form the first ear plate 241.

[0066] Please see Figure 4 In some embodiments, the thermal management plate 24 has a second ear plate 242, and the second ear plate 242 has a second inner cavity 244. The second intermediate tube 52 is connected to the second ear plate 242 and communicates with the other end of the flow channel 245 through the second inner cavity 244. In this way, by setting the second ear plate 242 to connect the second intermediate tube 52, the connection position between the second intermediate tube 52 and the thermal management plate 24 can be avoided from the battery module 23, thereby improving the compatibility between the thermal management plate 24 and the battery module 23 and improving assembly efficiency.

[0067] Specifically, the edge of the thermal management plate 24 protrudes outward to form a second ear plate 242.

[0068] Please see Figure 2In some embodiments, the thermal management plate 24 has a third ear plate 248 with a third inner cavity 246. The liquid outlet main pipe 252 is connected to the third ear plate 248 and communicates with the portion of the flow channel 245 near the first intermediate pipe 51 through the third inner cavity 246. Thus, by connecting the third ear plate 248 to the liquid outlet main pipe 252, the connection position between the liquid outlet main pipe 252 and the thermal management plate 24 can be avoided from the battery module 23, improving the compatibility between the thermal management plate 24 and the battery module 23 and increasing assembly efficiency.

[0069] The third ear plate 248 is connected to the adjacent first ear plate 241. Specifically, the third ear plate 248 and the adjacent first ear plate 241 are integrally formed.

[0070] Specifically, the edge of the thermal management plate 24 protrudes outward to form a third ear plate 248.

[0071] Please see Figure 2 In some embodiments, the thermal management plate 24 has a fourth ear plate 249 with a fourth inner cavity 247. The liquid inlet main pipe 251 is connected to the fourth ear plate 249 and communicates with the portion of the flow channel 245 near the second intermediate pipe 52 through the fourth inner cavity 247. Thus, by connecting the fourth ear plate 249 to the liquid inlet main pipe 251, the connection position between the liquid inlet main pipe 251 and the thermal management plate 24 can be avoided from the battery module 23, improving the compatibility between the thermal management plate 24 and the battery module 23 and increasing assembly efficiency.

[0072] The fourth ear plate 249 is connected to the adjacent second ear plate 242. Specifically, the fourth ear plate 249 and the adjacent second ear plate 242 are integrally formed.

[0073] Specifically, the edge of the heat management plate 24 protrudes outward to form a fourth ear plate 249.

[0074] Please see Figure 2 In some embodiments, the inlet pipe 251 and the outlet pipe 252 are connected to the flow channel 245 of the same thermal management plate 24. This makes the thermal management device 100 structurally regular, facilitates assembly, and improves assembly efficiency.

[0075] For example, the thermal management device 100 includes five thermal management plates 24. The inlet and outlet water pipes are connected to the flow channels 245 of the central thermal management plate 24. To improve flow distribution uniformity and enhance the consistency of thermal management performance, the flow distribution ratio within each thermal management plate 24 is 1:2:2:2:1 along the Z-direction. This results in a lower flow rate for the single-sided heat exchanger plates 24 at both ends and a higher flow rate for the remaining double-sided heat exchanger plates 24, thereby improving the consistency of heat exchange efficiency between the battery modules 23 at both ends and other battery modules 23.

[0076] Please see Figure 5 In some embodiments, at least one of the first intermediate tube 51 and the second intermediate tube 52 is a telescopic tube 10. By using at least one of the first intermediate tube 51 and the second intermediate tube 52 as a telescopic tube 10, its length can be adjusted to compensate for or absorb dimensional tolerances, ensuring that the length matches the spacing between the heat management plates 24. This improves the fit between the first intermediate tube 51 and the second intermediate tube 52 and the adjacent heat management plates 24, reduces assembly difficulty, and increases assembly efficiency.

[0077] Specifically, both the first intermediate pipe 51 and the second intermediate pipe 52 are telescopic pipes 10.

[0078] Please see Figure 5 , Figure 6 and Figure 7 In some embodiments, the telescopic tube 10 includes a first tube 11, a second tube 12, and a sealing assembly. The first tube 11 has a socket 113; one end of the second tube 12 is inserted into the socket 113. The sealing assembly is annularly disposed between the first tube 11 and the second tube 12. The end of the first tube 11 facing away from the second tube 12 is connected to a heat management plate 24 and communicates with a corresponding flow channel 245. The end of the second tube 12 facing away from the first tube 11 is connected to another heat management plate 24 and communicates with a corresponding flow channel 245. Thus, by setting the first tube 11 and the second tube 12 to be inserted together and configuring the sealing assembly, the sealing performance of the mating parts between the first tube 11 and the second tube 12 can be effectively ensured, and the insertion depth of the first tube 11 and the second tube 12 can be adjusted to adjust the length of the telescopic tube 10, thereby compensating for or absorbing dimensional tolerances. This simplifies the structure of the telescopic tube 10, facilitates length adjustment, and improves economy and assembly efficiency.

[0079] Specifically, one side of the first ear plate 241 is connected to the first tube 11 of a telescopic tube 10, and the other side of the first ear plate 241 is connected to the second tube 12 of another telescopic tube 10.

[0080] Please see Figure 6 , Figure 7In some embodiments, the sealing assembly includes a first sealing ring 13, a retaining ring 14, and a compression ring 15. The first sealing ring 13 is annularly disposed between the first pipe 11 and the second pipe 12. The retaining ring 14 is annularly disposed between the first pipe 11 and the second pipe 12 and connected to the first pipe 11. The compression ring 15 is annularly disposed between the first pipe 11 and the second pipe 12, with both ends of the compression ring 15 abutting against the retaining ring 14 and the first sealing ring 13, respectively. The compression ring 15 is configured to press the first sealing ring 13 against the bottom surface of the socket 113 under the limiting position of the retaining ring 14. Thus, by limiting the compression ring 15 with the retaining ring 14, the compression ring 15 presses the first sealing ring 13 against the bottom surface of the socket 113, thereby improving the positional stability of the first sealing ring 13, preventing axial movement of the first sealing ring 13, effectively improving the smoothness of movement of the second pipe 12 relative to the first pipe 11, and improving assembly efficiency.

[0081] The outer circumferential surface of the first sealing ring 13 is fitted with the first tube 11 to form a sealing surface. The inner circumferential surface of the first sealing ring 13 is fitted with the second tube 12 to form a sealing surface. The first sealing ring 13 can be an O-ring, a rectangular ring, etc. The material of the first sealing ring 13 can be nitrile rubber, EPDM rubber, or fluororubber, etc.

[0082] For example, the material of the retaining ring 14 includes, but is not limited to, spring steel and stainless steel.

[0083] For example, the material of the extrusion ring 15 includes, but is not limited to, polyoxymethylene, nylon, etc.

[0084] It is understood that, according to the required sealing level, a first sealing ring 13 and a compression ring 15 of corresponding size are configured so that the compression force of the contact surface between the first sealing ring 13 and the first tube 11 and the second tube 12 meets the requirements.

[0085] It is understood that when connecting the first tube 11 and the second tube 12, the first sealing ring 13, the compression ring 15, and the retaining ring 14 are first installed sequentially on the socket 113. Then, the end of the second tube 12 is passed sequentially through the retaining ring 14, the compression ring 15, and the first sealing ring 13. The insertion depth of the first tube 11 and the second tube 12 can be adjusted according to the distance between two adjacent heat management plates 24 so that the length of the telescopic tube 10 formed after the first tube 11 and the second tube 12 are consistent with the distance between the heat management plates 24.

[0086] Please see Figure 6 , Figure 7 and Figure 8In some embodiments, a groove 114 is provided on the side of the socket 113. A retaining block 143 is provided on the outer peripheral surface of the retaining ring 14. The retaining block 143 is located within the groove 114. In this way, the groove 114 and the retaining block 143 cooperate to ensure the axial positional stability of the retaining ring 14 relative to the first tube 11, and also to make the fit between the retaining ring 14 and the first tube 11 simple and easy to form.

[0087] Please see Figure 7 and Figure 9 In some embodiments, the end face of the retaining block 143 facing the compression ring 15 is a wedge surface 144. In this way, the wedge surface 144 can guide the retaining ring 14 to be installed into the socket 113, and can also reduce the resistance of the initial clamping of the retaining ring 14, thereby improving the smoothness and efficiency of the retaining ring 14 being installed into the socket 113.

[0088] Please see Figure 8 and Figure 9 In some embodiments, there are multiple slots 114 and multiple locking blocks 143. Each slot 114 corresponds to a locking block 143. Each locking block 143 is located within its corresponding slot 114. This increases the mating area between the retaining ring 14 and the first tube 11, thereby increasing the limiting effect of the first tube 11 on the retaining ring 14 and improving the stress state of the mating parts between the retaining ring 14 and the first tube 11, thus enhancing the durability of the telescopic tube 10.

[0089] Specifically, multiple locking blocks 143 are evenly distributed at intervals along the circumference of the locking ring 14, and multiple locking slots 114 are evenly distributed at intervals along the circumference of the first tube 11.

[0090] Please see Figure 5 In some embodiments, a first positioning structure 145 is provided on the end face of the retaining ring 14 facing away from the compression ring 15, and the first positioning structure 145 is disposed opposite to the retaining block 143 along the axial direction of the retaining ring 14. A second positioning structure 115 is provided on the end face of the first tube 11 near the socket 113, and the second positioning structure 115 is disposed opposite to the retaining groove 114 along the axial direction of the first tube 11. The first positioning structure 145 is disposed radially opposite to the second positioning structure 115. Thus, the relative position between the retaining block 143 and the retaining groove 114 can be determined by the relative position between the first positioning structure 145 and the second positioning structure 115, thereby improving the accuracy of the fit between the retaining block 143 and the retaining groove 114 and increasing assembly efficiency.

[0091] It is understood that when there are multiple card blocks 143, there are multiple first positioning structures 145, and each first positioning structure 145 corresponds to a card ring 14. Correspondingly, when there are multiple card slots 114, there are multiple second positioning structures 115, and each second positioning structure 115 corresponds to a card slot 114.

[0092] For example, the first positioning structure 145 is a rib, and the second positioning structure 115 is a notch. The rib extends circumferentially along the retaining ring 14, and the notch extends circumferentially along the first tube 11, and the size of the central angle of the rib is equal to the size of the central angle of the notch.

[0093] Specifically, the ribs are provided on the outer periphery of the end face of the retaining ring 14 facing away from the extrusion ring 15. The notch is provided on the inner periphery of the end face of the first tube 11 near the socket 113.

[0094] Please see Figure 7 In some embodiments, along the axial direction of the retaining ring 14, the inner circumferential surface of the retaining ring 14 includes a first conical surface 141 and a second conical surface 142 connected in sequence. The first conical surface 141 is located at the end of the second conical surface 142 away from the compression ring 15. The taper of the first conical surface 141 is greater than the taper of the second conical surface 142, and the diameters of both the first conical surface 141 and the second conical surface 142 decrease sequentially from the retaining ring 14 towards the compression ring 15. In this way, the first conical surface 141 with its larger taper guides the insertion of the second tube 12, improving the smoothness of the insertion between the first tube 11 and the second tube 12. Simultaneously, the second conical surface 142 with its smaller taper reduces the mating gap between the retaining ring 14 and the second tube 12, thereby improving the dustproof performance of the retaining ring 14 and effectively preventing dust and other impurities from entering the retaining ring 14.

[0095] It is understandable that the minimum diameter of the first conical surface 141 is not less than the maximum diameter of the second conical surface 142.

[0096] For example, an arc transition surface is provided between the first conical surface 141 and the second conical surface 142, so that the first conical surface 141 smoothly transitions to the second conical surface 142.

[0097] Please see Figure 7 In some embodiments, there are two first sealing rings 13, which are arranged sequentially along the axial direction of the first tube 11. This increases the sealing surface area between the first tube 11 and the second tube 12, which helps to improve the sealing effect between the first tube 11 and the second tube 12, thereby improving the reliability of the thermal management device 100.

[0098] Please see Figure 7 In some embodiments, the first sealing ring 13 is an O-ring, and the thermal management device 100 further includes a spacer 16, which is arranged around the first pipe 11 and the second pipe 12, and is located between the two first sealing rings 13. This ensures a good sealing effect between the first pipe 11 and the second pipe 12, and also effectively isolates the two first sealing rings 13 through the spacer 16, preventing one of the two first sealing rings 13 from being squeezed to the inside or outside of the other, thus ensuring that each first sealing ring 13 is in an effective sealing position.

[0099] Please see Figure 6 , Figure 7 and Figure 8 In some embodiments, the first pipe 11 includes a first sub-pipe 111 and a second sub-pipe 112 connected in sequence. The outer diameter of the first sub-pipe 111 is larger than the outer diameter of the second sub-pipe 112. The inner diameter of the first sub-pipe 111 is larger than the inner diameter of the second sub-pipe 112, thus defining a socket 113. The bottom surface of the socket 113 is the end face of the second sub-pipe 112 facing the first sub-pipe 111. The end of the second sub-pipe 112 facing away from the first sub-pipe 111 is connected to the corresponding heat management plate 24. In this way, the socket 113 can be defined, the wall thickness of the first pipe 11 is uniform, and the material usage of the first pipe 11 can be controlled.

[0100] It is understandable that the first sub-tube 111 and the second sub-tube 112 are integrally formed.

[0101] Please see Figure 5 In some embodiments, a plurality of reinforcing ribs 116 are provided at the connection between the first sub-tube 111 and the second sub-tube 112. The plurality of reinforcing ribs 116 are distributed sequentially along the circumference of the first sub-tube 111, and the reinforcing ribs 116 are located on the outer wall of the first tube 11. In this way, the structural strength of the connection between the first sub-tube 111 and the second sub-tube 112 can be enhanced by the reinforcing ribs 116, thereby improving the reliability of the first tube 11 and thus improving the reliability of the telescopic tube 10.

[0102] Please see Figure 5 In some embodiments, the thermal management device 100 further includes a first quick-connect fitting 171, with each end of the first intermediate tube 51 connected to a corresponding thermal management plate 24 via a first quick-connect fitting 171. Thus, when connecting the first intermediate tube 51 to the thermal management plate 24, the connection efficiency between the first intermediate tube 51 and the thermal management plate 24 can be improved through the first quick-connect fitting 171, thereby improving assembly efficiency.

[0103] For example, the outer wall of the first tube 11 is provided with a limiting groove 117, and the first quick-connect tube connector 171 is provided with a limiting block 173. The limiting block 173 is configured to be inserted into the limiting groove 117 along the axial direction of the first tube 11 and to contact the inner wall of the limiting groove 117. In this way, the circumferential synchronization of the first tube 11 and the first quick-connect tube connector 171 is improved, wear is avoided, and the sealing performance between the first tube 11 and the first quick-connect tube connector 171 is improved.

[0104] Please see Figure 5In some embodiments, the thermal management device 100 further includes a second quick-connect fitting 172. Both ends of the second intermediate tube 52 are respectively connected to the corresponding thermal management plate 24 via a second quick-connect fitting 172. Thus, when connecting the second intermediate tube 52 to the thermal management plate 24, the connection efficiency between the second intermediate tube 52 and the thermal management plate 24 can be improved through the second quick-connect fitting 172, thereby improving assembly efficiency.

[0105] The connection structure between the second quick-connect connector 172 and the second intermediate tube 52 is the same as the connection structure between the first quick-connect connector 171 and the first intermediate tube 51.

[0106] Please see Figure 2 , Figure 10 , Figure 11 , Figure 12 and Figure 13 In some embodiments, the thermal management device 100 further includes an exhaust valve 33. The exhaust valve 33 is disposed on the uppermost of the plurality of thermal management plates 24 and communicates with the flow channel 245 of the corresponding thermal management plate 24.

[0107] It is understood that, in application, the exhaust valve 33 should not be lower than the height of the uppermost flow channel 245 of the thermal management device 100, so as to facilitate the smooth discharge of gas in the flow channel 245.

[0108] In this embodiment, by setting an exhaust valve 33, the gas in the flow channel 245 can be discharged through the exhaust valve 33, thereby reducing the obstruction of heat exchange by the gas in the flow channel 245 and improving the heat exchange efficiency of the heat management device 100.

[0109] Please see Figure 11 and Figure 13 In some embodiments, the thermal management plate 24 connected to the exhaust valve 33 has a first ear plate 241. The first ear plate 241 has a first inner cavity 243, the exhaust valve 33 is disposed on the first ear plate 241, and the air inlet of the exhaust valve 33 communicates with the flow channel 245 through the first inner cavity 243. In this embodiment, by disposing of the exhaust valve 33 on the first ear plate 241 at one end of the thermal management plate 24, gas in the flow channel 245 can be discharged through the exhaust valve 33, while avoiding the exhaust valve 33 occupying the plate surface of the thermal management plate 24. This improves the compatibility between the thermal management plate 24 and the battery module 23, and allows the plate surface of the thermal management plate 24 to focus on the temperature management of the battery module 23, thereby improving assembly efficiency.

[0110] Please see Figure 14In some embodiments, the thermal management device 100 further includes a connecting ring 34 and a second sealing ring 35. The connecting ring 34 is sleeved on the vent valve 33. The second sealing ring 35 is annularly disposed on the vent valve 33 and located at the end of the connecting ring 34 opposite to the first lug 241. The second sealing ring 35 is configured to clamp between the connecting ring 34 and the casing wall 41 of the battery pack 1000. In this way, the opposing surfaces between the connecting ring 34 and the casing wall 41 can be sealed by the second sealing ring 35, thereby improving the internal sealing performance of the battery pack 1000 and ensuring that the protection level of the battery pack 1000 meets the requirements.

[0111] It is understandable that the box wall 41 can be the side wall of the battery pack 1000, or it can be the box cover 22 of the battery pack 1000.

[0112] For example, if the ear plate is parallel to the surface of the thermal management plate 24, and the exhaust valve 33 is located on one side of the ear plate, then the exhaust valve 33 is positioned opposite to the cover 22. In this case, the box wall 41 is the cover 22 of the battery pack 1000.

[0113] For example, if the ear plate is parallel to the thermal management plate 24 and the vent valve 33 is located at the end of the ear plate away from the main body of the thermal management plate 24, then the vent valve 33 is positioned facing the side wall of the enclosure. In this case, the enclosure wall 41 is the side wall of the battery pack 1000.

[0114] It is understandable that the force that compresses the second sealing ring 35 to achieve a sealing fit between the connecting ring 34 and the casing wall 41 of the battery pack 1000 can originate from the snap-fit ​​force or holding force used to assemble the battery module 23 and the thermal management plate 24 into the casing 21 assembly. For example, when the casing wall 41 is the casing cover 22 of the battery pack 1000, fixing the casing cover 22 to the casing 21 causes the casing cover 22 to press against the casing 21, thereby compressing the second sealing ring 35 to achieve a seal. As another example, when the casing wall 41 is the casing side wall of the battery pack 1000, installing the thermal management plate 24 and the battery module 23 into the casing 21 causes the second sealing ring 35 to be tightly pressed against the casing side wall, thereby achieving a seal by compressing the second sealing ring 35 through the casing side wall.

[0115] Please see Figure 11 , Figure 13 and Figure 14 In some embodiments, a through hole 341 is provided on the connecting ring 34, which is configured to allow the shank of the bolt 42 connecting the housing wall 41 to pass through. In this way, the connection between the bolt 42 and the housing wall 41 can generate a compressive force to compress the second sealing ring 35, making the second sealing ring 35 reliably compressed and helping to ensure the sealing effect inside the battery pack 1000.

[0116] Please see Figure 11 , Figure 13In some embodiments, the outer circumference of the connecting ring 34 is elliptical, and the through hole 341 is positioned opposite to the major axis of the ellipse along the axial direction of the connecting ring 34. This allows the connecting ring 34 to have sufficient size to accommodate the through hole 341, while also controlling the local radial dimension of the connecting ring 34. This helps reduce the space occupied by the connecting ring 34, decreases interference between the connecting ring 34 and other components within the battery pack 1000, and improves assembly efficiency.

[0117] Please see Figure 11 , Figure 13 and Figure 14 In some embodiments, a positioning platform 342 is provided on the side of the connecting ring 34 opposite to the first ear plate 241, and the second sealing ring 35 is sleeved on the positioning platform 342. In this way, during assembly, the second sealing ring 35 can be initially positioned by the positioning platform 342 to prevent the second sealing ring 35 from falling off, which helps to improve assembly efficiency.

[0118] Please see Figure 10 , Figure 12 In some embodiments, the first ear plate 241 is parallel to the surface of the heat management plate 24. This allows the first ear plate 241 to be positioned by the main body of the heat management plate 24 during assembly, reducing the molding difficulty of the heat management plate 24 and improving molding efficiency.

[0119] Please see Figure 10 and Figure 11 In some embodiments, the vent valve 33 is disposed on one surface of the first ear plate 241. This arrangement of the vent valve 33 along the thickness direction of the first ear plate 241 makes the thermal management plate 24 suitable for a battery pack 1000 having mounting space in the thickness direction of the first ear plate 241.

[0120] Please see Figure 12 and Figure 13 In other embodiments, the vent valve 33 is disposed at the end of the first ear plate 241. This allows the vent valve 33 to be arranged in a direction parallel to the width of the first ear plate 241, thereby making the thermal management plate 24 suitable for a battery pack 1000 having mounting space in a direction other than the thickness of the first ear plate 241.

[0121] The heat pipe device also includes a cover 36. The first ear plate 241 has an opening at its end opposite to the main body of the heat management plate 24, and this opening communicates with the inner cavity. The cover 36 is connected to the first ear plate 241 and covers the opening. An exhaust valve 33 is installed on the cover 36. Thus, the cover 36 and the exhaust valve 33 can be assembled first, and then the exhaust valve 33 can be installed on the first ear plate 241 through the cover 36, reducing the difficulty of installing the exhaust valve 33 and improving assembly efficiency.

[0122] For example, the cap 36 is welded to the first ear plate 241.

[0123] It can be understood that the main body of the heat management plate 24 refers to the part of the heat management plate 24 that defines the flow channel 245.

[0124] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0125] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0126] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0127] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A thermal management device (100), characterized in that, include: Multiple heat management plates (24) are parallel to each other and arranged sequentially along their own thickness direction, and each heat management plate (24) has a flow channel (245). Multiple first intermediate tubes (51) are staggered with the multiple heat management plates (24), and the two ends of the first intermediate tubes (51) are respectively connected to one end of the flow channel (245) of one of the heat management plates (24); Multiple second intermediate tubes (52) are staggered with the multiple heat management plates (24), and the two ends of the second intermediate tubes (52) are respectively connected to the other end of the flow channel (245) of one of the heat management plates (24); The main outlet pipe (252) is connected to a portion of the flow channel (245) near the first intermediate pipe (51); and The liquid inlet main pipe (251) is connected to a portion of the flow channel (245) near the second intermediate pipe (52).

2. The thermal management device (100) according to claim 1, characterized in that, The heat management plate (24) has a first ear plate (241), the first ear plate (241) has a first inner cavity (243), the first intermediate tube (51) is connected to the first ear plate (241) and communicates with one end of the flow channel (245) through the first inner cavity (243).

3. The thermal management device (100) according to claim 1, characterized in that, The heat management plate (24) has a second ear plate (242), the second ear plate (242) has a second inner cavity (244), the second intermediate tube (52) is connected to the second ear plate (242), and communicates with the other end of the flow channel (245) through the second inner cavity (244).

4. The thermal management device (100) according to claim 1, characterized in that, The heat management plate (24) has a third ear plate (248) with a third inner cavity (246). The liquid outlet main pipe (252) is connected to the third ear plate (248) and communicates with the part of the flow channel (245) near the first intermediate pipe (51) through the third inner cavity (246).

5. The thermal management device (100) according to claim 1, characterized in that, The heat management plate (24) has a fourth ear plate (249) and a fourth inner cavity (247). The liquid inlet main pipe (251) is connected to the fourth ear plate (249) and communicates with the part of the flow channel (245) near the second intermediate tube (52) through the fourth inner cavity (247).

6. The thermal management device (100) according to any one of claims 1 to 5, characterized in that, The liquid inlet pipe (251) and the liquid outlet pipe (252) are connected to the flow channel (245) of the same heat management plate (24).

7. The thermal management device (100) according to any one of claims 1 to 5, characterized in that, At least one of the first intermediate tube (51) and the second intermediate tube (52) is a telescopic tube (10).

8. The thermal management device (100) according to claim 7, characterized in that The telescopic tube (10) includes: The first pipe (11) has a socket (113); The second pipe (12) is inserted at one end into the socket (113); and A sealing assembly is arranged in a ring between the first tube (11) and the second tube (12); Wherein, the end of the first tube (11) away from the second tube (12) is connected to a heat management plate (24) and communicates with the corresponding flow channel (245); the end of the second tube (12) away from the first tube (11) is connected to another heat management plate (24) and communicates with the corresponding flow channel (245).

9. The thermal management device (100) of claim 8, characterized in that The sealing assembly includes: The first sealing ring (13) is arranged in a ring between the first tube (11) and the second tube (12); A retaining ring (14) is disposed between the first tube (11) and the second tube (12) and is connected to the first tube (11); and A compression ring (15) is disposed between the first tube (11) and the second tube (12). The two ends of the compression ring (15) abut against the retaining ring (14) and the first sealing ring (13) respectively. The compression ring (15) is configured to press the first sealing ring (13) against the bottom surface of the socket (113) under the limiting position of the retaining ring (14).

10. The thermal management device (100) of claim 9, characterized in that The side of the socket (113) is provided with a slot (114), and the outer peripheral surface of the retaining ring (14) is provided with a block (143), which is located in the slot (114).

11. The thermal management device (100) of claim 10, characterized in that The end face of the card block (143) facing the compression ring (15) is a wedge face (144). And / or, there are multiple card slots (114) and card blocks (143), with each card slot (114) corresponding to a card block (143), and each card block (143) located in the corresponding card slot (114).

12. The thermal management device (100) of claim 10, characterized in that, The retaining ring (14) has a first positioning structure (145) on its end face away from the compression ring (15), and the first positioning structure (145) is arranged opposite to the retaining block (143) along the axial direction of the retaining ring (14); the first tube (11) has a second positioning structure (115) on its end face near the socket (113), and the second positioning structure (115) is arranged opposite to the retaining groove (114) along the axial direction of the first tube (11); The first positioning structure (145) is arranged in the radial direction of the retaining ring (14) facing the second positioning structure (115).

13. The thermal management device (100) according to claim 9, characterized in that, Along the axial direction of the retaining ring (14), the inner circumferential surface of the retaining ring (14) includes a first conical surface (141) and a second conical surface (142) connected in sequence. The first conical surface (141) is located at the end of the second conical surface (142) away from the extrusion ring (15). The taper of the first conical surface (141) is greater than the taper of the second conical surface (142). From the retaining ring (14) toward the extrusion ring (15), the diameter of the first conical surface (141) and the diameter of the second conical surface (142) both decrease sequentially.

14. The thermal management device (100) according to any one of claims 9 to 13, characterized in that, There are two first sealing rings (13), and the two first sealing rings (13) are arranged sequentially along the axial direction of the first tube (11).

15. The thermal management device (100) according to claim 14, characterized in that, The first sealing ring (13) is an O-ring. The thermal management device (100) also includes a spacer (16), which is arranged in a ring between the first tube (11) and the second tube (12). The spacer (16) is located between the two first sealing rings (13).

16. The thermal management device (100) according to any one of claims 9 to 13, characterized in that, The first tube (11) includes a first sub-tube (111) and a second sub-tube (112) connected in sequence. The outer diameter of the first sub-tube (111) is larger than the outer diameter of the second sub-tube (112). The inner diameter of the first sub-tube (111) is larger than the inner diameter of the second sub-tube (112) to define the socket (113). The bottom surface of the socket (113) is the end face of the second sub-tube (112) facing the first sub-tube (111). The end of the second sub-tube (112) away from the first sub-tube (111) is connected to the corresponding heat management plate (24).

17. The thermal management device (100) according to claim 16, characterized in that, A plurality of reinforcing ribs (116) are provided at the connection between the first sub-tube (111) and the second sub-tube (112). The plurality of reinforcing ribs (116) are distributed sequentially along the circumference of the first sub-tube (111) and the reinforcing ribs (116) are located on the outer wall of the first tube (11).

18. The thermal management device (100) according to any one of claims 1 to 5, characterized in that, The thermal management device (100) further includes a first quick-connect fitting (171), and the two ends of the first intermediate tube (51) are respectively connected to the corresponding thermal management plate (24) through a first quick-connect fitting (171); And / or, the thermal management device (100) further includes a second quick-connect fitting (172), and the two ends of the second intermediate tube (52) are respectively connected to the corresponding thermal management plate (24) through a second quick-connect fitting (172).

19. The thermal management device (100) according to any one of claims 1 to 5, characterized in that The thermal management device (100) further includes an exhaust valve (33), which is disposed on the uppermost one of the plurality of thermal management plates (24) and is connected to the flow channel (245) of the corresponding thermal management plate (24).

20. The thermal management device (100) of claim 19, characterized in that, The heat management plate (24) connected to the exhaust valve (33) has a first ear plate (241), the first ear plate (241) has a first inner cavity (243), the exhaust valve (33) is disposed on the first ear plate (241), and the air inlet of the exhaust valve (33) is connected to the flow channel (245) through the first inner cavity (243).

21. The thermal management device (100) according to claim 20, characterized in that, The thermal management device (100) further includes a connecting ring (34) and a second sealing ring (35). The connecting ring (34) is sleeved on the exhaust valve (33). The second sealing ring (35) is arranged around the exhaust valve (33) and located at one end of the connecting ring (34) away from the first ear plate (241). The second sealing ring (35) is configured to be clamped between the connecting ring (34) and the casing wall (41) of the battery pack (1000).

22. The thermal management device (100) according to claim 21, characterized in that, A through hole (341) is provided on the connecting ring (34), the through hole (341) being configured to allow the shank of the bolt (42) connecting the box wall (41) to pass through.

23. The thermal management device (100) according to claim 22, characterized in that, The outer circumference of the connecting ring (34) is elliptical, and the through hole (341) is arranged opposite to the major axis of the ellipse along the axial direction of the connecting ring (34).

24. The thermal management device (100) according to any one of claims 21 to 23, characterized in that, The connecting ring (34) is provided with a positioning platform (342) on the side opposite to the first ear plate (241), and the second sealing ring (35) is sleeved on the positioning platform (342).

25. The thermal management device (100) according to any one of claims 20 to 23, characterized in that, The first ear plate (241) is parallel to the surface of the heat management plate (24).

26. The thermal management device (100) according to any one of claims 20 to 23, characterized in that, The exhaust valve (33) is disposed on one surface of the first ear plate (241); or, the exhaust valve (33) is disposed at the end of the first ear plate (241).

27. A battery pack (1000), characterized in that, include: The thermal management device (100) as described in any one of claims 1 to 26; as well as Multiple battery modules (23) are staggered with the multiple thermal management plates (24), and each battery module (23) is in contact with the adjacent thermal management plate (24).

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