Expansion tank, thermal management system, and vehicle

Abstract

An expansion tank, a thermal management system, and a vehicle. An expansion tank (10) is for use in a vehicle, and the vehicle comprises a motor heat exchange circuit (20) and a battery heat exchange circuit (30). The expansion tank (10) comprises a tank body (100) and a flow channel assembly (200). The tank body (100) defines a fluid storage chamber (130) for storing a heat exchange fluid. The flow channel assembly (200) comprises a first flow channel portion (210) and a second flow channel portion (220). The first flow channel portion (210) and the second flow channel portion (220) jointly define a fluid replenishment passage (230) and a degassing passage (240). Both the fluid replenishment passage (230) and the degassing passage (240) are in communication with the fluid storage chamber (130), and both can communicate with the motor heat exchange circuit (20) and / or the battery heat exchange circuit (30). The first flow channel portion (210) and / or the second flow channel portion (220) is integrally connected to the tank body (100).

Description

Expansion kettle, thermal management system and vehicle CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202410218560.8, filed on February 28, 2024, the entire text of which is incorporated herein by reference. Technical Field

[0002] The present application relates to, but is not limited to, the field of vehicle thermal management, and in particular to an expansion kettle, a thermal management system, and a vehicle. Background Art

[0003] Expansion kettles can be used in the vehicle's heat exchange circuit to replenish and degas the motor circuit and battery circuit. Specifically, taking the application of expansion kettles in the cooling system as an example, the coolant circulates in the cooling system. If the pressure in the system is too high, the expansion kettle can allow excess gas and coolant to flow out through the bypass water channel, thereby avoiding potential damage caused by excessive pressure in the cooling system. The expansion kettle can also serve to store excess coolant. When the coolant expands due to rising temperature, the additional coolant will flow into the expansion kettle to prevent the system from overloading. The expansion kettle can also be used to replenish coolant or antifreeze to keep the cooling system working properly. Summary of the Invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The main purpose of this application is to propose an expansion kettle, a thermal management system and a vehicle, which can reduce the difficulty of installing and arranging the expansion kettle and improve the sealing during the medium transportation process.

[0006] To achieve the above-mentioned objectives, an embodiment of the first aspect of the present application proposes an expansion kettle for a vehicle, the vehicle including a motor heat exchange circuit and a battery heat exchange circuit, the expansion kettle including: a kettle body, defining a liquid storage chamber for storing heat exchange liquid; a flow channel assembly, including a first flow channel portion and a second flow channel portion, the first flow channel portion and the second flow channel portion jointly defining a fluid replenishment channel and a degassing channel, the fluid replenishment channel and the degassing channel are both connected to the fluid storage chamber, and the fluid replenishment channel and the degassing channel are both suitable for connecting to the motor heat exchange circuit and / or the battery heat exchange circuit; wherein the first flow channel portion and / or the second flow channel portion are integrally connected to the kettle body.

[0007] In some embodiments, the first flow channel portion is integrally connected to the kettle body, the second flow channel portion is detachably connected to the first flow channel portion, and the second flow channel portion is separated from or detachably connected to the kettle body.

[0008] In some embodiments, the kettle body includes a first shell and a second shell assembled and connected to each other, the first shell and the second shell jointly define a liquid storage chamber, the first flow channel portion is integrally connected to the first shell, and the second flow channel portion is integrally connected to the second shell.

[0009] In some embodiments, the first flow channel portion is integrally connected to the kettle body, and the second flow channel portion is detachably connected to the first flow channel portion; the first flow channel portion is plate-shaped, and the first flow channel portion includes a first side wall, a second side wall, and a peripheral wall located between the first side wall and the second side wall, one side of the peripheral wall is connected to the kettle body, and the second flow channel portion is connected to the first side wall and / or the second side wall.

[0010] In some embodiments, the second flow channel portion includes a first flow channel plate and a second flow channel plate. The first flow channel plate is connected to the first side wall and together with the first flow channel portion defines a first flow channel. The second flow channel plate is connected to the second side wall and together with the first flow channel portion defines a second flow channel. The first flow channel and the second flow channel are combined to form a total flow channel, which includes a fluid infusion channel and a degassing channel.

[0011] In some embodiments, the first flow channel portion is provided with a through hole penetrating the first side wall and the second side wall, and the first flow channel is connected to the second flow channel at the through hole.

[0012] In some embodiments, the fluid replenishment channel includes a battery fluid replenishment channel and a motor fluid replenishment channel, the battery fluid replenishment channel is connected to the battery heat exchange circuit, and the motor fluid replenishment channel is connected to the motor heat exchange circuit; the degassing channel includes a battery degassing channel connected to the battery heat exchange circuit.

[0013] In some embodiments, the expansion kettle is provided with a first guide hole, a second guide hole and a third guide hole. The first guide hole, the second guide hole and the third guide hole are all arranged through the peripheral wall, and one end is provided on the kettle body and the other end is provided on the first flow channel portion; the battery replenishment flow channel is connected to the liquid storage chamber through the first guide hole, the battery degassing flow channel is connected to the liquid storage chamber through the second guide hole, and the motor replenishment flow channel is connected to the liquid storage chamber through the third guide hole.

[0014] In some embodiments, the battery refill channel is connected to the battery degassing channel; the second guide hole forms a first guide port at the battery degassing channel, and a partition is provided in the battery degassing channel, one end of the partition is connected to the side of the first guide port close to the first guide hole, and the other end extends toward the other side of the first guide port and is spaced apart from the first guide port.

[0015] In some embodiments, the kettle body includes a first shell and a second shell, the first shell and the second shell jointly define a liquid storage chamber, and the first shell is integrally connected to the first flow channel portion; the first shell has a first inner wall surface facing the liquid storage chamber, the first guide hole forms a second guide port on the first inner wall surface, the second guide hole forms a third guide port on the first inner wall surface, and the third guide hole forms a fourth guide port on the first inner wall surface, and the first shell includes a first annular flange connected to the first inner wall surface at one end, and the first annular flange is respectively arranged around the second guide port, the third guide port and the fourth guide port.

[0016] In some embodiments, the second shell has a second inner wall facing the liquid storage chamber, and the second shell includes a second annular flange connected to the second inner wall at one end, and the second annular flange abuts against the first annular flange at one end facing away from the second inner wall.

[0017] In some embodiments, the kettle body is also provided with an air inlet connecting port, which is connected to the liquid storage chamber, and the air inlet connecting port is suitable for connecting to the motor heat exchange circuit to obtain the gas generated by the motor heat exchange circuit; and / or the liquid replenishment channel and the degassing channel are both directly connected to the motor heat exchange circuit and the battery heat exchange circuit.

[0018] In some embodiments, the flow channel assembly is further provided with a fixing structure; the fixing structure is suitable for fixing the water pump or valve of the motor heat exchange circuit; and / or the fixing structure is suitable for fixing the water pump or valve of the battery heat exchange circuit.

[0019] An embodiment of the second aspect of the present application further provides a thermal management system, comprising an expansion kettle according to any of the above embodiments; a motor heat exchange circuit; and a battery heat exchange circuit; wherein the motor heat exchange circuit, the battery heat exchange circuit, and the expansion kettle all contain heat exchange fluid.

[0020] An embodiment of the third aspect of the present application further provides a vehicle, comprising a thermal management system according to any one of the above embodiments; and a driving system.

[0021] In the expansion kettle of the present application, the liquid storage chamber of the kettle body is used to store coolant, and in order to communicate with the heat exchange circuit of the vehicle, the first flow channel portion and the second flow channel portion of the flow channel assembly jointly define a fluid replenishment channel and a degassing channel, and both channels are connected to the liquid storage chamber, and according to needs, the above two channels can be correspondingly connected to the motor heat exchange circuit and / or the battery heat exchange circuit of the vehicle. In particular, the first flow channel portion and / or the second flow channel portion are integrally connected to the kettle body, that is, at least a portion of the fluid replenishment channel and the degassing channel are integrally connected to the kettle body. Compared with the connection form of the related art that uses pipelines to connect the expansion kettle and the heat exchange circuit, the above-mentioned integrated connection setting of the present application is equivalent to removing the pipeline in the related art, and transferring the function of the pipeline to the fluid replenishment channel and the degassing channel, and through the first flow channel portion and the second flow channel portion, at least a portion of the above-mentioned fluid replenishment channel and the degassing channel are connected to the kettle body as a whole. The expansion kettle of the present application connects the kettle body to at least one of the first flow channel portion and the second flow channel portion in an integral manner, thereby reducing the number of components in the thermal management system and eliminating the need to connect the kettle body to the fluid replenishment channel and the degassing channel, thereby reducing the difficulty of installing and arranging the expansion kettle. Furthermore, the integrated connection setting can effectively reduce the loss of medium (liquid leakage / gas leakage) in the fluid replenishment channel / degassing channel during the transportation process. Therefore, the expansion kettle of the present application can improve the integrity between the vehicle's heat exchange circuit and the fluid replenishment channel / degassing channel, thereby reducing the difficulty of installing and arranging the expansion kettle and improving the sealing performance during the medium transportation process.

[0022] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be derived based on the structures shown in these drawings without inventive effort.

[0024] FIG1 is a perspective schematic diagram of an expansion kettle in one embodiment of the present application.

[0025] FIG2 is a first exploded schematic diagram of an expansion kettle from a first perspective in one embodiment of the present application.

[0026] FIG3 is a first exploded schematic diagram of the expansion kettle from a second perspective in one embodiment of the present application.

[0027] FIG4 is a partial enlarged schematic diagram of point A in FIG3 .

[0028] FIG5 is a first exploded schematic diagram of the expansion kettle from a third perspective in one embodiment of the present application.

[0029] FIG6 is a second exploded schematic diagram of the expansion kettle from a fourth perspective in one embodiment of the present application.

[0030] FIG7 is a second exploded schematic diagram of the expansion kettle from a fifth perspective in one embodiment of the present application.

[0031] FIG8 is a schematic top view of the first shell of the expansion kettle in one embodiment of the present application.

[0032] FIG9 is a schematic cross-sectional view of the combination of the first shell and the first flow channel portion in one embodiment of the present application.

[0033] FIG10 is a partial enlarged schematic diagram of point B in FIG9 .

[0034] FIG11 is a schematic cross-sectional view of an expansion kettle in one embodiment of the present application.

[0035] FIG12 is a partial enlarged schematic diagram of point C in FIG11 .

[0036] FIG13 is a schematic cross-sectional view of an expansion kettle in another embodiment of the present application.

[0037] FIG14 is a schematic structural diagram of a thermal management system in one embodiment of the present application.

[0038] Explanation of Reference Numerals: 10 - kettle; 100 - kettle body; 110 - first shell; 111 - first annular flange; 112 - first inner wall; 120 - second shell; 121 - second annular flange; 122 - second inner wall; 123 - second flow guide port; 124 - third flow guide port; 125 - fourth flow guide port; 130 - liquid storage chamber; 140 - air inlet connection port; 200 - flow channel assembly; 210 - first flow channel portion; 211 - first side wall; 212 - second side wall; 213 - peripheral wall; 214 - through hole; 215-first guide port; 216-partition; 220-second flow channel; 221-first flow channel plate; 222-second flow channel plate; 230-replenishing channel; 231-motor replenishing channel; 232-battery replenishing channel; 240-degassing channel; 241-battery degassing channel; 242-motor degassing channel; 250-main flow channel; 251-first flow channel; 252-second flow channel; 260-fixed structure; 310-first guide hole; 320-second guide hole; 330-third guide hole; 20-motor heat exchange circuit; 30-battery heat exchange circuit.

[0039] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. The described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0041] In related art, the expansion kettle and heat exchange circuit are connected using piping. For example, the expansion kettle's air inlet port can be connected to the radiator's water supply pipe via an air pipe, while the water inlet port can be connected to the water inlet side of the water pump (or the radiator's water flow channel) via a water pipe. This piping connection method is relatively complex, difficult to assemble, occupies a large space, and is prone to water or air leakage.

[0042] In view of this, referring to Figures 1-14, an embodiment of the present application provides an expansion kettle 10 for use in a vehicle. To meet the vehicle's heat exchange requirements, the vehicle includes a motor heat exchange circuit 20 and a battery heat exchange circuit 30. Thus, illustratively, the motor heat exchange circuit 20 can employ a water-cooled heat dissipation mode, utilizing coolant to exchange heat and using an electronic water pump to regulate water flow and balance temperature differences. The battery heat exchange circuit 30 can include cooling, heating, and temperature balancing functions. The cooling and heating functions primarily address the potential impact of ambient temperature on the battery. When the vehicle is in a low-temperature environment, the power battery pack will issue a heating request through the power battery management system (BMS) if the temperature is too low. At this time, a three-way water valve can be used to control the heat from the PTC (Positive Temperature Coefficient) heater to enter the plate heat exchanger for heat exchange with the low-temperature coolant in the power battery circuit. The coolant then indirectly exchanges heat with the power battery cold plate, thereby increasing the power battery temperature. It should be noted that the heat exchange circuits involved in this application (including the motor heat exchange circuit 20 and the battery heat exchange circuit 30) can be heat exchange systems configured based on the heat exchange principle. Therefore, the heat exchange circuits can be cooling circuits, heating circuits, or temperature-adjustable circuits. For ease of description, the following example uses an embodiment in which both the motor heat exchange circuit 20 and the battery heat exchange circuit 30 are cooling circuits. Different embodiments can be combined with different technical solutions.

[0043] Based on the above-mentioned motor heat exchange circuit 20 and battery heat exchange circuit 30 , the expansion kettle 10 of the embodiment of the present application includes a kettle body 100 and a flow channel assembly 200 .

[0044] Specifically, referring to Figure 6 , the kettle body 100 defines a liquid storage chamber 130 for storing a heat exchange fluid. The heat exchange fluid is a medium liquid used to regulate the temperature of the heat exchange circuit. It can be used to increase or decrease the temperature, or to flexibly control the temperature. For ease of explanation, the following description uses an embodiment in which the heat exchange fluid is a coolant. It will be understood that the liquid storage chamber 130 is an internal cavity defined by the kettle body 100 itself. The liquid storage chamber 130 can be sealed when the expansion kettle 10 is not in operation, and the coolant within the liquid storage chamber 130 can be drained when the expansion kettle 10 is in operation. Furthermore, in some embodiments, the liquid storage chamber 130 can also be used to store gas. Based on the functions described above, the kettle body 100 and the corresponding liquid storage chamber 130 can have any suitable shape. For example, the kettle body 100 can have the shape of a rectangle, a cube, a sphere, or a cylinder. To facilitate the injection of coolant, the kettle body 100 can have a liquid inlet for introducing coolant into the liquid storage chamber 130. To facilitate liquid level detection, the expansion kettle 10 may further include a liquid level sensor. The liquid level sensor may be configured to detect the liquid level of the coolant in the liquid storage chamber 130 .

[0045] 1 to 7 , the flow channel assembly 200 includes a first flow channel portion 210 and a second flow channel portion 220. The first flow channel portion 210 and the second flow channel portion 220 jointly define a fluid replenishment channel 230 and a degassing channel 240. It should be noted that, in different embodiments, the fluid replenishment channel 230 and the degassing channel 240 can share a channel, that is, one channel can be used for fluid replenishment and exhaust at the same time. At this time, the kettle body 100 and the flow channel assembly 200 can both be provided with a fluid replenishment opening and a degassing opening connected to the channel so that the functions do not interfere with each other, or the fluid replenishment channel 230 and the degassing channel 240 can be two different channels respectively. As for the specific form of defining the channel, in some embodiments, the first flow channel portion 210 and the second flow channel portion 220 can respectively correspond to two parts of the wall that defines the channel. Taking the fluid infusion channel 230 as an example, in some embodiments, the first flow channel portion 210 can define a portion of the fluid infusion channel 230, and the second flow channel portion 220 can define another portion of the fluid infusion channel 230, and the two can be connected to form a complete fluid infusion channel 230. As needed, the wall defining the fluid infusion channel 230 / degassing channel 240 can be divided into two parts in any manner and in any direction. When the fluid infusion channel 230 and the degassing channel 240 are two different channels, in some embodiments, the first flow channel portion 210 can independently define the fluid infusion channel 230, and the second flow channel portion 220 can independently define the degassing channel 240.

[0046] In addition, the refill channel 230 and the degassing channel 240 are both connected to the liquid storage chamber 130. Both the refill channel 230 and the degassing channel 240 are adapted to communicate with the motor heat exchange circuit 20 and / or the battery heat exchange circuit 30. With this arrangement, the coolant in the liquid storage chamber 130 can be delivered to the motor heat exchange circuit 20 or the battery heat exchange circuit 30 via the refill channel 230 or the degassing channel 240 (which can be a single channel or multiple channels).

[0047] In particular, referring to Figures 1 to 7, the first flow channel portion 210 and / or the second flow channel portion 220 are integrally connected to the kettle body 100. Thus, by providing an arrangement in which at least one of the first flow channel portion 210 and the second flow channel portion 220 is integrally connected to the kettle body 100, at least a portion of the fluid replenishment channel 230 and the degassing channel 240 can be integrally connected to the kettle body 100. For example, in some embodiments, when the fluid replenishment channel 230 and the degassing channel 240 share a channel, the first flow channel portion 210 can define a portion of the channel and be integrally connected to the kettle body 100, while the second flow channel portion 220 can define another portion of the channel and be connected to the first flow channel portion 210 in any suitable form, so that the two together define a complete fluid replenishment channel 230 and a degassing channel 240.

[0048] It should be noted that the aforementioned motor heat exchange circuit 20 represents a circuit for heat exchange within the vehicle's motor system. For example, in some embodiments, the motor heat exchange circuit 20 may include an electric water pump, a radiator, a cooling fan, and piping. The motor system's function is to maintain the motor's operating temperature and prevent overheating. In some vehicle models, electronic power components such as the motor controller and DC-DC converter may also be connected in series within the motor heat exchange circuit to provide effective cooling based on the temperature characteristics of each component. Furthermore, the battery heat exchange circuit 30 represents a circuit for heat exchange within the vehicle's battery system, with cooling modes primarily including air cooling, liquid cooling, and direct cooling. For example, in some embodiments, the battery heat exchange circuit 30 utilizes a liquid cooling mode, with the battery chiller and electronic water pump as core components. The battery chiller may utilize a plate heat exchanger designed with an internal turbulent flow structure to enhance heat exchange efficiency. The electronic water pump may be electrically powered and operate independently of the engine speed. Correspondingly, the rehydration channel 230 can be represented as a channel suitable for replenishing coolant or antifreeze to the motor heat exchange circuit 20 or the battery heat exchange circuit 30, and can also be suitable for excess coolant in the motor heat exchange circuit 20 or the battery heat exchange circuit 30 to flow into the liquid storage chamber 130 through the channel. The degassing channel 240 can be represented as a channel suitable for eliminating or storing excess gas in the motor heat exchange circuit 20 or the battery heat exchange circuit 30. In addition, in addition to rehydration and degassing, according to needs, in some embodiments, the first flow channel portion 210 and the second flow channel portion 220 can also jointly define channels with other functions. Based on the above functional description, in different embodiments, the rehydration channel 230 and the degassing channel 240 can be in any suitable form or shape, which is not limited here.

[0049] For ease of description, the embodiments of the present application all refer to a channel as a single channel integrating the rehydration channel 230 and the degassing channel 240. Furthermore, in the embodiments of the present application, the heat exchange circuit is referred to as the motor heat exchange circuit 20 or the battery heat exchange circuit 30, and the flow channel is referred to as the first flow channel 210 or the second flow channel 220.

[0050] Based on the combination of the above embodiments, it can be seen that in the expansion kettle 10 of the present application, the liquid storage chamber 130 of the kettle body 100 is used to store coolant, and in order to communicate with the vehicle's heat exchange circuit, the first flow channel portion 210 and the second flow channel portion 220 of the flow channel assembly 200 jointly define a liquid replenishment channel 230 and a degassing channel 240. Both channels are connected to the liquid storage chamber 130, and according to needs, the above two channels can be correspondingly connected to the vehicle's motor heat exchange circuit 20 and / or battery heat exchange circuit 30. In particular, the first flow channel portion 210 and / or the second flow channel portion 220 are integrally connected to the kettle body 100, that is, at least a portion of the liquid replenishment channel 230 and the degassing channel 240 are integrally connected to the kettle body 100. Compared to the connection form of the related art that uses pipes to connect the expansion kettle 10 and the heat exchange circuit, the above-mentioned integrated connection setting of the present application is equivalent to removing the pipes in the related art and transferring the function of the pipes to the fluid replenishment channel 230 and the degassing channel 240. At least a portion of the above-mentioned fluid replenishment channel 230 and the degassing channel 240 are connected to the kettle body 100 through the first flow channel portion 210 and the second flow channel portion 220. The expansion kettle 10 of the present application can reduce the difficulty of installation and layout of the expansion kettle 10 through the integrated connection setting and the connection between the vehicle's heat exchange circuit and the fluid replenishment channel 230 / degassing channel 240, and can effectively reduce the loss of medium (liquid leakage / gas leakage) in the fluid replenishment channel 230 / degassing channel 240 during transportation. Therefore, the expansion kettle 10 of the present application can improve the integrity between the vehicle's heat exchange circuit and the fluid replenishment channel 230 / degassing channel 240, thereby reducing the difficulty of installation and layout of the expansion kettle 10 and improving the sealing during the medium transportation process.

[0051] It should be noted that the medium in the embodiments of the present application is any of the various media required to meet the fluid replenishment and degassing functions, such as coolant, antifreeze, and gas, wherein the gas can be the gas that needs to be removed by the heat exchange circuit, the gas generated by negative pressure exhaust, or the reaction gas that can react with the gas to be removed to remove it, etc.

[0052] As can be seen from the above embodiments, the first flow channel 210 and the second flow channel 220 can be integrally connected to the kettle body 100 in various forms. Specifically, the connection between the first flow channel 210 and the second flow channel 220, and the specific connection between the first flow channel 210 and the second flow channel 220 and the kettle body 100 are described below by way of example.

[0053] 2 to 7 , in an embodiment of the first connection form, the first flow channel portion 210 can be integrally connected to the kettle body 100, the second flow channel portion 220 can be detachably connected to the first flow channel portion 210, and the second flow channel portion 220 can be separated from or detachably connected to the kettle body 100. The above-mentioned setting of the first flow channel portion 210 can make the integrated first flow channel portion 210 and the kettle body 100 easier to manufacture, and the setting of the second flow channel portion 220 can facilitate cleaning or maintenance of the channel. Any suitable detachable connection method can be adopted between the second flow channel portion 220 and the first flow channel portion 210 or the kettle body 100. Exemplarily, the second flow channel portion 220 and the first flow channel portion 210 or the kettle body 100 can be bolted, snap-fitted, or magnetically connected. Other detachable connection methods in the embodiments of the present application can also refer to the above-mentioned exemplary connection methods, which will not be repeated below.

[0054] To facilitate cleaning or maintenance of the kettle body 100, or to facilitate the connection and assembly of the flow channel portion, see Figure 2 or Figure 7. In some embodiments, the kettle body 100 may include a first shell 110 and a second shell 120 that are assembled and connected to each other, and the first shell 110 and the second shell 120 jointly define a liquid storage chamber 130. In different embodiments, the direction in which the first shell 110 and the second shell 120 are relatively connected may correspond to the depth direction of the liquid storage chamber 130 (a direction perpendicular to the width direction of the liquid storage chamber 130), or the direction in which the first shell 110 and the second shell 120 are relatively connected may correspond to the width direction of the liquid storage chamber 130, see Figure 13.

[0055] Based on the configuration of the above embodiment, in the second connection form embodiment, the first flow channel portion 210 can be integrally connected to the first housing 110, and the second flow channel portion 220 can be integrally connected to the second housing 120. This configuration allows the first flow channel portion 210 and the second flow channel portion 220 to be connected simultaneously with the connection between the first housing 110 and the second housing 120. When the first flow channel portion 210 and the second flow channel portion 220 need to be assembled, the first flow channel portion 210 and the second flow channel portion 220 can also be connected simultaneously, jointly defining the fluid infusion channel 230 and the degassing channel 240. This configuration thus improves the convenience of assembly and disassembly of the first flow channel portion 210 and the second flow channel portion 220.

[0056] Based on an embodiment of the first connection form described above, the first flow channel portion 210 is integrally connected to the kettle body 100, and the second flow channel portion 220 is detachably connected to the first flow channel portion 210. Referring to Figures 2 to 7, in some embodiments, the first flow channel portion 210 may be plate-shaped. It should be noted that, in different embodiments, the first flow channel portion 210 may be in any suitable shape. The first flow channel portion 210 may be a flat plate or an irregular plate body. The irregular plate body may be a curved plate or may have a raised structure on the plate body peripheral wall 213. The raised structure may be used to define a rehydration channel 230 and a degassing channel 240. Therefore, referring to Figure 2, the first flow channel portion 210 may include a first side wall 211, a second side wall 212, and a peripheral wall 213 located between the first side wall 211 and the second side wall 212. It can be understood that the peripheral wall 213 is a wall extending around the center of the first flow channel portion 210. In the plate-shaped first flow channel portion 210, the width dimension of the peripheral wall 213 can correspond to the thickness dimension of the plate-shaped first flow channel portion 210. Accordingly, the first side wall 211 and the second side wall 212 are two walls that are opposite to each other along the axis of the peripheral wall 213. Based on this, to facilitate the assembly and communication between the first flow channel portion 210 and the kettle body 100 / the second flow channel portion 220, see Figures 1-2. In some embodiments, one side of the peripheral wall 213 can be connected to the kettle body 100. The second flow channel portion 220 can be connected to the first side wall 211 and / or the second side wall 212. In other words, the opposing first side wall 211 and the second side wall 212 can be used to connect the second flow channel portion 220 to form a complete rehydration channel 230 or a degassing channel 240, or to connect the two channels. Furthermore, when only one sidewall is connected to the second flow channel portion 220, the other opposing sidewall can also be used to connect other channels besides the fluid infusion channel 230 and the degassing channel 240. When the second flow channel portion 220 comprises multiple sections, each section of the second flow channel portion 220 can be correspondingly connected to the first sidewall 211 or the second sidewall 212. For example, in some embodiments, the motor heat exchange circuit 20 can be connected to the channel defined by the first sidewall 211 and the second flow channel portion 220 on one side, and the battery heat exchange circuit 30 can be connected to the channel defined by the second sidewall 212 and the second flow channel portion 220 on the other side. While the channel is defined by the first sidewall 211 or the second sidewall 212, since the kettle body 100 is connected to the peripheral wall 213, the kettle body 100 does not occupy the space where the channel extends. From the location of the channel connected to the heat exchange circuit, the channel can gradually approach the kettle body 100 along the first sidewall 211 or the second sidewall 212, connecting the heat exchange circuit with the liquid storage chamber 130.

[0057] Regarding the embodiment described above in which the second flow channel portion 220 includes multiple parts, and each part of the second flow channel portion 220 can be correspondingly connected to the first side wall 211 or the second side wall 212, specifically, referring to Figures 1-7, in some embodiments, the second flow channel portion 220 can include a first flow channel plate 221 and a second flow channel plate 222. The first flow channel plate 221 can be connected to the first side wall 211 and, together with the first flow channel portion 210, define a first flow channel 251. The second flow channel plate 222 can be connected to the second side wall 212 and, together with the first flow channel portion 210, define a second flow channel 252. It is understood that the first flow channel plate 221 and the second flow channel plate 222 are two plates connected to the two sides of the first flow channel portion 210. Accordingly, the first flow channel plate 221 and the second flow channel plate 222 can respectively define two flow channels on the two sides of the first flow channel portion 210, namely, the first flow channel 251 and the second flow channel 252.

[0058] Based on this, referring to Figure 3 or Figure 5 or Figure 6, in some embodiments, the first flow channel 251 and the second flow channel 252 can be combined to form a total flow channel 250. The total flow channel 250 may include a rehydration channel 230 and a degassing channel 240. It can be understood that the first flow channel 251 and the second flow channel 252 jointly define the total flow channel 250. In addition, the first flow channel 251 defined by the first flow channel plate 221 and one side of the first flow channel portion 210, and the second flow channel 252 defined by the second flow channel plate 222 and the other side of the first flow channel portion 210 may not be connected, that is, the total flow channel 250 may include a first flow channel 251 and a second flow channel 252 that are not connected to each other. Alternatively, the first flow channel 251 and the second flow channel 252 may be connected through the opening of the first flow channel portion 210. Based on the above description of the main flow channel 250, the main flow channel 250 includes a fluid replenishment channel 230 and a degassing channel 240, which means that the main flow channel 250 defined by the first flow channel plate 221, the second flow channel plate 222 and the first flow channel portion 210 can include a fluid replenishment channel 230 and a degassing channel 240, and can also include channels with other functions.

[0059] In addition, the rehydration channel 230 and the degassing channel 240 can be distributed in the main flow channel 250 in various forms. For example, referring to Figures 3-4 and 9, in the first channel arrangement, the rehydration channel 230 and the degassing channel 240 share a channel, the first flow channel 251 can be suitable for connecting to the motor heat exchange circuit 20, and the second flow channel 252 can be suitable for connecting to the battery heat exchange circuit 30. Thus, the first flow channel 251 can be used to replenish or degas the motor heat exchange circuit 20, and the second flow channel 252 can be used to replenish or degas the battery heat exchange circuit 30. In the second channel arrangement, the rehydration channel 230 can be entirely located in the first flow channel 251 (or the first flow channel 251 is the rehydration channel 230), and the degassing channel 240 can be entirely located in the second flow channel 252 (or the second flow channel 252 is the degassing channel 240). In the third channel arrangement, a portion of the refill channel 230 may be located in the first flow channel 251, and the other portion may be located in the second flow channel 252. The two portions of the refill channel 230 may not be connected to each other, and serve to replenish the motor heat exchange circuit 20 and the battery heat exchange circuit 30 respectively. The two portions of the refill channel 230 may also be connected to each other so that the coolant can shuttle between the first flow channel 251 and the second flow channel 252 to increase the flow path of the coolant. The above-mentioned setting for the refill channel 230 can also be applied to the degassing channel 240, and will not be repeated here.

[0060] Regarding the embodiment described above in which the first flow channel 251 and the second flow channel 252 are connected, specifically referring to FIG9 , in some embodiments, the first flow channel portion 210 may be provided with a through hole 214 that penetrates the first side wall 211 and the second side wall 212 , thereby allowing the first flow channel 251 to communicate with the second flow channel 252 at the through hole 214 . Regarding the function of the through hole 214, combined with the various channel arrangements described above, on the one hand, the through hole 214 allows the coolant in the first flow channel 251 and the second flow channel 252 to complement each other; on the other hand, the through hole 214 connects the flow channels on both sides and can also prevent blockage of one side of the flow channel or the corresponding interface / heat exchange circuit interface of the kettle body 100 connected to the flow channel; and on another hand, the connection of the flow channels on both sides can effectively increase the flow path of the coolant. Furthermore, there can be multiple through holes 214 to enable the coolant to shuttle back and forth between the first flow channel 251 and the second flow channel 252 multiple times.

[0061] Since the expansion kettle 10 of the embodiment of the present application can be adapted to connect to the motor heat exchange circuit 20 and the battery heat exchange circuit 30, referring to Figures 9-12, in order to prevent the expansion kettle 10 from interfering with the functions of the two heat exchange circuits, a flow channel for the battery and a flow channel for the motor can be separately divided within the refill channel 230 / degassing channel 240. That is, in some embodiments, the refill channel 230 can include a battery refill channel 232 and a motor refill channel 231. The battery refill channel 232 can be connected to the battery heat exchange circuit 30, and the motor refill channel 231 can be connected to the motor heat exchange circuit 20. Similarly, in some embodiments, the degassing channel 240 can include a battery degassing channel 241 connected to the battery heat exchange circuit 30, and a motor degassing channel 242 connected to the motor heat exchange circuit 20.

[0062] To improve the integration between the various flow channels, as an example, referring to FIG9 , in some embodiments, the battery refill flow channel 232, the motor refill flow channel 231, and the battery degassing flow channel 241 are all located on the same side of the first flow channel portion 210. In different embodiments, multiple of the battery refill flow channel 232, the motor refill flow channel 231, and the battery degassing flow channel 241 may share a channel, or each may be an independent channel. It is understood that the above arrangement allows the three flow channels to be integrated on the same side of the first flow channel portion 210, thereby facilitating the installation and maintenance of the flow channels. However, due to the influence of the layout of the motor heat exchange circuit 20 and the location of the relevant components, the motor degassing flow channel 242 may not be located on the same side as the aforementioned battery refill flow channel 232, the motor refill flow channel 231, and the battery degassing flow channel 241. Furthermore, the motor degassing flow channel 242 may also be an independent channel, rather than being integrated into the expansion kettle. In addition to the above examples, in some embodiments, any number of the battery refill channel 232, the motor refill channel 231, the battery degassing channel 241, and the motor degassing channel 242 can be located on the same side of the first channel portion 210. As needed, the refill channel 230 can be used to refill the motor heat exchange circuit 20 or the battery heat exchange circuit 30, and the degassing channel 240 can be used to degas the motor heat exchange circuit 20 or the battery heat exchange circuit 30.

[0063] To facilitate the flow of medium from the battery refill channel 232, the motor refill channel 231, and the battery degassing channel 241 to the liquid storage chamber 130, as shown in FIG9 , in some embodiments, the expansion kettle 10 may be provided with a first guide hole 310, a second guide hole 320, and a third guide hole 330. The first guide hole 310, the second guide hole 320, and the third guide hole 330 may all be disposed through the peripheral wall 213, and may each be disposed at one end on the kettle body 100 and at the other end on the first flow channel portion 210. Thus, the battery refill channel 232 may be connected to the liquid storage chamber 130 via the first guide hole 310, the battery degassing channel 241 may be connected to the liquid storage chamber 130 via the second guide hole 320, and the motor refill channel 231 may be connected to the liquid storage chamber 130 via the third guide hole 330. It is understood that the first guide hole 310, the second guide hole 320, and the third guide hole 330 can respectively correspond to the functions of the battery refill channel 232, the battery degassing channel 241, and the motor refill channel 231. In this case, the battery refill channel 232, the battery degassing channel 241, and the motor refill channel 231 can each be three independent channels, or they can share a single channel with three guide holes disposed on the wall of the channel. In addition, the three guide holes can have any suitable shape as needed.

[0064] Based on the above-described arrangement of the flow guide holes, as shown in Figures 9-12 , in some embodiments, the battery refill channel 232 communicates with the battery degassing channel 241. Consequently, the second flow guide hole 320 can form a first flow guide opening 215 at the battery degassing channel 241. In other words, the first flow guide opening 215 serves as the opening of the second flow guide hole 320. A partition 216 can be provided within the battery degassing channel 241. One end of the partition 216 can be connected to the side of the first flow guide opening 215 near the first flow guide hole 310, while the other end can extend toward the other side of the first flow guide opening 215 and be spaced apart from the first flow guide opening 215. This arrangement places the partition 216 around the first flow guide hole 310. This allows the partition 216 to block or filter the medium before it flows into the first flow guide opening 215, preventing interference from other channels in the battery degassing channel 241 and thereby improving the degassing efficiency of the battery degassing channel 241.

[0065] Incorporating the flow guide holes into the definition and arrangement of the first shell 110 and the second shell 120 in the above-mentioned embodiments, see Figures 6-8. In some embodiments, the first shell 110 can be integrally connected to the first flow channel portion 210. The first shell 110 can have a first inner wall surface 112 facing the liquid storage chamber 130. The first flow guide hole 310 can form a second flow guide port 123 on the first inner wall surface 112. The second flow guide hole 320 can form a third flow guide port 124 on the first inner wall surface 112. The third flow guide hole 330 can form a fourth flow guide port 125 on the first inner wall surface 112. It can be understood that the first inner wall surface 112 can define a liquid guide cavity, which can be used to transport the medium between the first flow guide hole 310, the second flow guide hole 320, the third flow guide hole 330, and the liquid storage chamber 130. Based on the configuration of the first inner wall surface 112, referring to Figures 6-12, in some embodiments, the first housing 110 may include a first annular flange 111 connected to the first inner wall surface 112 at one end. The first annular flange 111 may be disposed around the second flow guide opening 123, the third flow guide opening 124, and the fourth flow guide opening 125, respectively. It is understood that the first annular flange 111, as the outer peripheral flange structure of the flow guide opening, may be located on the side of the flow guide opening closer to the liquid storage chamber 130 or on the side of the flow guide opening farther from the liquid storage chamber 130. Furthermore, the opening enclosed by the first annular flange 111 may be larger than or equal to the size of the opening of the connected flow guide opening. Specifically, the first annular flange 111 may be located on the side of the flow guide opening closer to the liquid storage chamber 130. In this case, the first annular flange 111 may be used to further store and separate the medium within the liquid storage chamber 130, preventing the medium from overflowing and interfering with other channels or components.

[0066] The first inner wall surface 112 includes a bottom wall surface and a peripheral wall surface. In some embodiments, referring to Figures 8-12, the first guide hole 310, the second guide hole 320, and the third guide hole 330 can each penetrate the bottom wall surface of the first inner wall surface 112, and in this embodiment, the first flow channel portion 210 is integrally connected to the bottom plate of the first housing 110. In other embodiments, the first guide hole 310, the second guide hole 320, and the third guide hole 330 can each penetrate the peripheral wall surface of the first inner wall surface 112, and in this embodiment, the first flow channel portion 210 is integrally connected to the peripheral wall plate of the first housing 110.

[0067] Based on the first shell 110 of the above embodiment, further, referring to Figures 6 to 9, in some embodiments, the second shell 120 may have a second inner wall surface 122 facing the liquid storage chamber 130. The second shell 120 may include a second annular flange 121 connected to the second inner wall surface 122 at one end. The end of the second annular flange 121 facing away from the second inner wall surface 122 abuts against the first annular flange 111. In this way, the second annular flange 121 and the first annular flange 111 jointly define three accommodating chambers, and the three guide holes are connected to the three accommodating chambers in a one-to-one manner, and the first annular flange 111 and / or the second annular flange 121 are provided with notches so that the three accommodating chambers are connected to each other to avoid liquid level impact on the expansion kettle 10.

[0068] Regarding the first annular flange 111 described in the above embodiments, the first annular flange 111 can be of any suitable shape as required, so as to correspond to the position of each guide hole and adapt to the spatial layout of the liquid storage chamber 130, or the shape can be set to make the strength and rigidity of the first annular flange 111 better. For example, when viewed along the depth direction of the liquid storage chamber 130, the first annular flange 111 can be of any suitable shape, for example, the first annular flange 111 can be one or more combinations of rectangles, circles, rectangular rings, and irregular combinations (combinations of rectangles and circles, combinations of rectangles and triangles, etc.). The second annular flange 121 can also be configured in the same way.

[0069] It can be seen from the description of the above embodiments that, in addition to storing coolant, the liquid storage chamber 130 can also be used to introduce gas from the battery degassing duct 241 or the motor degassing duct 242. In order to facilitate the separate collection of liquid and gas in the liquid storage chamber 130 and avoid mutual interference between the two, referring to Figures 1 to 3, in some embodiments, the kettle body 100 can also be provided with an air inlet connection port 140. The air inlet connection port 140 can be connected to the liquid storage chamber 130. Thus, the air inlet connection port 140 can be suitable for connecting to the motor heat exchange circuit 20 to obtain the gas generated by the motor heat exchange circuit 20. In other words, the liquid obtained from the heat exchange circuit by the expansion kettle 10 can be directly stored in the liquid storage chamber 130; and the gas from the heat exchange circuit obtained by the liquid storage chamber 130 can be discharged or collected through the air inlet connection port 140. In this process, the gas may pass through the liquid storage chamber 130 or may not pass through the liquid storage chamber 130.

[0070] In order to further reduce the difficulty of installation and layout of the expansion kettle 10 and avoid complicated piping settings, referring to FIG14 , in some embodiments, the rehydration channel 230 and the degassing channel 240 can both be directly connected to the motor heat exchange circuit 20 and the battery heat exchange circuit 30. It can be understood that the interfaces of both the rehydration channel 230 and the degassing channel 240 can be directly connected to the corresponding motor heat exchange circuit 20 or the battery heat exchange circuit 30 without being connected through additional pipelines. The form in which the rehydration channel 230 and the degassing channel 240 are connected to the heat exchange circuit can be adaptively adjusted according to the interface of the heat exchange circuit, and is not limited here. In addition, according to needs, in other embodiments, the interfaces of both the rehydration channel 230 and the degassing channel 240 can be connected to the pipeline first, and then connected to the motor heat exchange circuit 20 or the battery heat exchange circuit 30 through the pipeline.

[0071] In addition to being connected to the motor heat exchange circuit 20 or the battery heat exchange circuit 30 via the rehydration channel 230 and the degassing channel 240, the expansion kettle 10 of the embodiment of the present application can also integrate other components to further improve the integrity of the expansion kettle 10 and related structures. Specifically, referring to Figures 1-3, in some embodiments, the flow channel assembly 200 can also be provided with a fixing structure 260. Thus, the fixing structure 260 can be suitable for fixing the water pump or valve of the motor heat exchange circuit 20; and / or, the fixing structure 260 can be suitable for fixing the water pump or valve of the battery heat exchange circuit 30.

[0072] Referring to Figure 14 , an embodiment of the second aspect of the present application further provides a thermal management system, comprising an expansion kettle 10, a motor heat exchange circuit 20, and a battery heat exchange circuit 30 according to any of the above embodiments. The motor heat exchange circuit 20, the battery heat exchange circuit 30, and the expansion kettle 10 all contain a heat exchange fluid.

[0073] The third embodiment of the present application further provides a vehicle, including the thermal management system and driving system of any of the above embodiments. It should be noted that the vehicle in the present application includes various types of vehicles, for example, the vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck; the vehicle can also be an operating vehicle, such as a van, bus, small truck, or large trailer; the vehicle can also be a gasoline vehicle or a new energy vehicle. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0074] The above-mentioned thermal management system and other structures and configurations of the vehicle can be referred to in related art and will not be described in detail here. In addition, thanks to the improvements made to the expansion kettle 10 in the above-mentioned embodiments, the thermal management system of the second embodiment of the present application and the vehicle of the third embodiment of the present application both have the same technical effects as the expansion kettle 10 in the above-mentioned embodiments and will not be described in detail here.

[0075] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0076] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0077] The above are only some embodiments of the present application and are not intended to limit the scope of protection of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings, or direct / indirect applications in other related technical fields, within the scope of protection of the present application, are included in the scope of protection of the present application.

Claims

1. An expansion kettle (10) for a vehicle, the vehicle comprising a motor heat exchange circuit (20) and a battery heat exchange circuit (30), wherein: The expansion kettle (10) comprises: The kettle body (100) defines a liquid storage chamber (130) for storing heat exchange liquid; A flow channel assembly (200) comprises a first flow channel portion (210) and a second flow channel portion (220), wherein the first flow channel portion (210) and the second flow channel portion (220) jointly define a fluid replenishment channel (230) and a degassing channel (240), wherein the fluid replenishment channel (230) and the degassing channel (240) are both in communication with the liquid storage chamber (130), and the fluid replenishment channel (230) and the degassing channel (240) are both suitable for being in communication with the motor heat exchange circuit (20) and / or the battery heat exchange circuit (30); Wherein, the first flow channel portion (210) and / or the second flow channel portion (220) are integrally connected to the kettle body (100).

2. The expansion kettle (10) according to claim 1, wherein The first flow channel portion (210) is integrally connected to the kettle body (100), the second flow channel portion (220) is detachably connected to the first flow channel portion (210), and the second flow channel portion (220) is separated from or detachably connected to the kettle body (100).

3. The expansion kettle (10) according to claim 1, wherein: The kettle body (100) comprises a first shell (110) and a second shell (120) which are assembled and connected to each other. The first shell (110) and the second shell (120) jointly define the liquid storage chamber (130). The first flow channel portion (210) is integrally connected to the first shell (110). The second flow channel portion (220) is integrally connected to the second shell (120).

4. The expansion kettle (10) according to claim 1, wherein The first flow channel portion (210) is integrally connected to the kettle body (100), and the second flow channel portion (220) is detachably connected to the first flow channel portion (210); The first flow channel portion (210) is plate-shaped, and includes a first side wall (211), a second side wall (212), and a peripheral wall (213) located between the first side wall (211) and the second side wall (212), one side of the peripheral wall (213) is connected to the kettle body (100), and the second flow channel portion (220) is connected to the first side wall (211) and / or the second side wall (212).

5. The expansion kettle (10) according to claim 4, wherein: The second flow channel portion (220) includes a first flow channel plate (221) and a second flow channel plate (222). The first flow channel plate (221) is connected to the first side wall (211) and defines a first flow channel (251) together with the first flow channel portion (210). The second flow channel plate (222) is connected to the second side wall (212) and defines a second flow channel (252) together with the first flow channel portion (210). The first flow channel (251) and the second flow channel (252) are combined to form a main flow channel (250), and the main flow channel (250) includes the fluid replenishment channel (230) and the degassing channel (240).

6. The expansion kettle (10) according to claim 5, wherein: The first flow channel portion (210) is provided with a through hole (214) penetrating the first side wall (211) and the second side wall (212); the first flow channel (251) and the second flow channel (252) are connected at the through hole (214).

7. The expansion kettle (10) according to claim 5 or 6, wherein: The fluid replenishment channel (230) includes a battery fluid replenishment flow channel (232) and a motor fluid replenishment flow channel (231), the battery fluid replenishment flow channel (232) is in communication with the battery heat exchange circuit (30), and the motor fluid replenishment flow channel (231) is in communication with the motor heat exchange circuit (20); The degassing channel (240) includes a battery degassing channel (241) in communication with the battery heat exchange circuit (30).

8. The expansion kettle (10) according to claim 7, wherein: The expansion kettle (10) is provided with a first flow guide hole (310), a second flow guide hole (320), and a third flow guide hole (330); the first flow guide hole (310), the second flow guide hole (320), and the third flow guide hole (330) are all provided through the peripheral wall (213), and one end of each of the first flow guide hole is provided on the kettle body (100), and the other end is provided on the first flow channel portion (210); The battery fluid replenishment channel (232) is connected to the liquid storage chamber (130) through the first guide hole (310), the battery degassing channel (241) is connected to the liquid storage chamber (130) through the second guide hole (320), and the motor fluid replenishment channel (231) is connected to the liquid storage chamber (130) through the third guide hole (330).

9. The expansion kettle (10) according to claim 8, wherein: The battery fluid replenishment channel (232) is in communication with the battery degassing channel (241); The second guide hole (320) forms a first guide port (215) at the battery degassing channel (241), and a partition (216) is provided in the battery degassing channel (241). One end of the partition (216) is connected to a side of the first guide port (215) close to the first guide hole (310), and the other end extends toward the other side of the first guide port (215) and is spaced apart from the first guide port (215).

10. The expansion kettle (10) according to claim 8 or 9, wherein: The kettle body (100) comprises a first shell (110) and a second shell (120), wherein the first shell (110) and the second shell (120) jointly define the liquid storage chamber (130), and the first shell (110) is integrally connected to the first flow channel portion (210); The first shell (110) has a first inner wall surface (112) facing the liquid storage chamber (130); the first guide hole (310) forms a second guide port (123) on the first inner wall surface (112); the second guide hole (320) forms a third guide port (124) on the first inner wall surface (112); and the third guide hole (330) forms a fourth guide port (125) on the first inner wall surface (112). The first shell (110) includes a first annular flange (111) connected to the first inner wall surface (112) at one end, and the first annular flange (111) is respectively arranged around the second guide port (123), the third guide port (124), and the fourth guide port (125).

11. The expansion kettle (10) according to claim 10, wherein: The second shell (120) has a second inner wall surface (122) facing the liquid storage chamber (130), and the second shell (120) includes a second annular flange (121) with one end connected to the second inner wall surface (122), and the end of the second annular flange (121) facing away from the second inner wall surface (122) abuts against the first annular flange (111).

12. The expansion kettle (10) according to any one of claims 1 to 11, wherein: The kettle body (100) is further provided with an air intake communication port (140), the air intake communication port (140) being in communication with the liquid storage chamber (130), and the air intake communication port (140) being adapted to be in communication with the motor heat exchange circuit (20) to obtain the gas generated by the motor heat exchange circuit (20); and / or The fluid replenishing channel (230) and the degassing channel (240) are both directly connected to the motor heat exchange circuit (20) and the battery heat exchange circuit (30).

13. The expansion kettle (10) according to any one of claims 1 to 12, wherein: The flow channel assembly (200) is further provided with a fixing structure (260); The fixing structure (260) is suitable for fixing a water pump or a valve of the motor heat exchange circuit (20); and / or, the fixing structure (260) is suitable for fixing a water pump or a valve of the battery heat exchange circuit (30).

14. A thermal management system comprising: The expansion kettle (10) according to any one of claims 1 to 13; The motor heat exchange circuit (20); and The battery heat exchange circuit (30); The motor heat exchange circuit (20), the battery heat exchange circuit (30) and the expansion kettle (10) all contain heat exchange fluid.

15. A vehicle comprising: The thermal management system of claim 14; as well as Driving system.

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