Expansion kettle, cooling system and vehicle

Abstract

The utility model relates to the technical field of battery cooling of new energy automobiles, and provides an expansion kettle, a cooling system and a vehicle, the expansion kettle comprises a kettle body and a conveying pipeline group, a separation flow channel is arranged in the kettle body, the lower end of the kettle body is provided with an opening, and the conveying pipeline group comprises a conveying pipeline and a discharge pipeline. One end of the conveying pipeline corresponds to the opening, and the other end of the conveying pipeline is communicated with a cooling pipeline of the battery cooling system; provided is a pressure water tank cover. A gas-liquid mixture discharged from the cooling pipeline enters the conveying pipeline, and part of the gas-liquid mixture enters the kettle body along the conveying sub-pipeline, is subjected to gas-liquid separation by utilizing the separation flow channel, and is output into the converging sub-pipeline from the kettle body along the outlet; and the other part of the gas-liquid mixture directly flows into the exhaust pipeline along the converging sub-pipeline, and the gas-liquid mixture in the cooling pipeline enters the conveying pipeline again, so that the circulation is realized, and finally, the effect of gradually emptying the air in the cooling pipeline is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling of new energy vehicles, and in particular to an expansion kettle, a cooling system and a vehicle. Background Art

[0002] With the gradual implementation of the "dual carbon" policy, new energy vehicles and electric vehicles will become the development trend of automobiles in the future. Batteries provide power for the driving of electric vehicles. In order to keep the battery in the best working condition, a matching cooling system is required to maintain the best working temperature of the battery. The expansion kettle is one of the components of the battery cooling system. Its function in the car is mainly to collect the expansion amount of the coolant in the entire cooling circuit when the coolant temperature is high. After the coolant temperature drops, the contraction amount of the coolant in the supplementary circuit is balanced, thereby balancing the pressure of the entire system. In actual use, when the coolant is injected from the expansion kettle into the entire cooling system, the coolant needs to fill the entire circuit. If there is air in the circuit, it will not only affect the cooling effect of the battery, but also the water pump is prone to cavitation. At the same time, the battery is generally installed under the seat of the passenger compartment of the car. There are specific requirements for the installation position of each component in the front cabin space of the car, resulting in a long pipeline for the entire battery cooling system. In the absence of vacuum, air is likely to remain in the pipeline during the filling process and cannot be discharged, thereby forming a pressure balance. The coolant in the expansion kettle cannot continue to be injected into the circuit, which creates an obstacle for the filling of the coolant.

[0003] The prior art discloses an expansion kettle, which includes a kettle body and a kettle cover, wherein the kettle body includes an outer cavity wall of the kettle body and an inner cavity wall of the kettle body located within the outer cavity wall of the kettle body, wherein the lower end of the inner cavity wall is connected to the inner surface of the bottom of the outer cavity wall. When exhaust is required, the kettle cover needs to be rotated manually to exhaust. When the user does not rotate the kettle cover, the coolant in the expansion kettle cannot continue to be injected into the circuit, which causes an obstacle to the filling of the coolant, resulting in poor battery cooling effect. In addition, there is a hollow outer cavity of the kettle body connected to the atmosphere between the outer cavity wall of the kettle body and the inner cavity wall of the kettle body. Since the outer cavity of the kettle body is connected to the atmosphere, the coolant will evaporate naturally after long-term use, resulting in a lack of coolant, requiring the user to frequently fill it, which causes inconvenience to the user. Utility Model Content

[0004] In view of this, the utility model provides an expansion kettle, a cooling system and a vehicle to solve the problem that the existing expansion kettle needs to manually rotate the kettle cover to vent when exhaust is needed. When the user does not rotate the kettle cover, the coolant in the expansion kettle cannot continue to be injected into the circuit, which creates an obstacle for the filling of the coolant, resulting in poor battery cooling effect. In addition, there is a hollow kettle body cavity connected to the atmosphere between the outer cavity wall of the kettle body and the inner cavity wall of the kettle body. Since the outer cavity of the kettle body is connected to the atmosphere, after long-term use, the coolant will evaporate naturally, resulting in a lack of coolant, requiring the user to refill frequently, resulting in inconvenience for the user.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An expansion kettle, comprising: a kettle body, a separation channel is arranged in the kettle body, the separation channel is suitable for gas-liquid separation of a gas-liquid mixture, and an opening is opened at the lower end of the kettle body; a delivery pipeline group is arranged at the lower end of the kettle body, comprising a delivery pipeline and at least one discharge pipeline, one end of the delivery pipeline is arranged corresponding to the opening, and the other end is connected to the cooling pipeline of the battery cooling system, the delivery pipeline has a separate confluence pipeline and at least one delivery sub-pipeline, each of the discharge pipelines is connected to the confluence sub-pipeline, so that each of the discharge pipelines is connected to the kettle body through the confluence sub-pipeline; a pressure water tank cover, a liquid filling port is arranged on the kettle body, the pressure water tank cover The pressure water tank cover is arranged at the liquid filling port; the delivery pipeline is suitable for receiving the gas-liquid mixture discharged from the cooling pipeline, and part of the gas-liquid mixture is suitable for flowing into the kettle body along each of the delivery sub-pipelines, so that the separation channel can perform gas-liquid separation on the gas-liquid mixture, and the cooling liquid of the gas-liquid mixture after the gas-liquid separation is output from the kettle body and flows along one end of the confluence sub-pipeline to the discharge pipeline to be delivered to the cooling pipeline of the battery cooling system, and part of the gas-liquid mixture flows along the other end of the confluence sub-pipeline to the discharge pipeline; when the gas pressure in the kettle body is greater than the predetermined pressure, the gas in the kettle body is suitable for being discharged from the kettle body from the pressure water tank cover along the liquid filling port.

[0007] Beneficial effect: by setting a separation flow channel in the kettle body, using the separation flow channel to separate the gas-liquid mixture, then opening an opening at the lower end of the kettle body, and then setting one end of the delivery pipeline of the delivery pipeline group corresponding to the opening, the other end of the delivery pipeline is connected to the cooling pipeline of the battery cooling system, and the delivery pipeline has a separate confluence pipeline and at least one delivery sub-pipeline, each discharge pipeline is connected to the confluence sub-pipeline, so that each discharge pipeline is connected to the kettle body through the confluence sub-pipeline, and a pressure water tank cover is provided at the liquid filling port on the kettle body, and when the cooling When the liquid circulates in the cooling pipeline and the expansion water tank to achieve the effect of gas-liquid separation, the gas-liquid mixture discharged from the cooling pipeline enters the delivery pipeline, and because the delivery pipeline has a separate confluence pipeline and a delivery sub-pipeline, part of the gas-liquid mixture will enter the kettle body along the delivery sub-pipeline, and the separation flow channel will be used to separate the gas-liquid mixture, and the cooling liquid after the diversion will be output from the kettle body to the confluence pipeline along the outlet, and flow along one end of the confluence pipeline to the discharge pipeline, while the other part of the gas-liquid mixture will directly flow along the other end of the confluence pipeline. One end flows to the exhaust pipeline to enter the cooling pipeline, and the gas-liquid mixture in the cooling pipeline enters the delivery pipeline again, thereby circulating, and finally achieving the effect of gradually emptying the air in the cooling pipeline, ensuring the normal circulation of the coolant in the cooling system, and further ensuring the cooling effect on the battery. The arrangement of the delivery pipeline group is to open an opening to realize the inflow and output of the gas-liquid mixture, without opening multiple openings on the kettle body and plugging multiple connecting pipes, which can effectively reduce the molding process and the complexity of installation. At the same time, the gas in the gas-liquid mixture will be continuously discharged in the kettle body. When the gas pressure in the kettle body is greater than the predetermined pressure, the gas in the kettle body will be discharged from the kettle body along the filling port from the pressure water tank cover. The discharge method adopts a self-exhaust method with good exhaust effect. The kettle cover at the filling port can be used for exhaust without the user's participation in rotating the cover. The exhaust method is convenient, and the coolant in the kettle body is isolated from the atmosphere. When used for a long time, the coolant will not evaporate and disappear in large quantities naturally, avoiding the situation of large-scale loss of coolant. The user does not need to refill frequently, but only needs to observe the usage of the coolant regularly and refill it accordingly, thereby improving the user's convenience.

[0008] In an optional embodiment, the delivery pipeline group further includes a diverter plate, at least one of which is disposed in the delivery pipeline, and one end of the diverter plate is disposed corresponding to the opening to separate the delivery pipeline into a converging sub-pipeline and at least one delivery sub-pipeline.

[0009] Beneficial effect: By using a diverter plate to separate the delivery pipeline into a converging sub-pipeline and at least one delivery sub-pipeline, the molding method is simple and reduces the difficulty of process molding. In addition, a corresponding opening is set at one end of the diverter plate, which can enable part of the gas-liquid mixture to enter the kettle body along an opening on one side of the diverter plate, and then be output from the kettle body along an opening on the other side of the diverter plate, without the need to set multiple openings.

[0010] In an optional embodiment, the axis of each of the transport sub-pipelines and / or the confluence sub-pipelines is arranged to form an angle with the horizontal direction.

[0011] Beneficial effect: By setting the axes of the transport sub-pipeline and the confluence sub-pipeline at an angle to the horizontal direction, and utilizing the fact that the gas has a lower density and will rise along the liquid, the gas-liquid mixture in the transport sub-pipeline contains more gas than the gas in the confluence sub-pipeline, thereby achieving the effect of pre-gas-liquid separation of the gas-liquid mixture and further improving the efficiency of gas-liquid separation.

[0012] In an optional embodiment, the axis of each of the transport sub-pipelines and / or the confluence sub-pipelines is arranged at an angle of 45° to the horizontal direction.

[0013] Beneficial effect: By setting the axes of the transport sub-pipeline and the confluence sub-pipeline at a 45° angle to the horizontal direction, this angle setting method makes it easier for the gas-liquid mixture to be diverted to the transport sub-pipeline and the confluence sub-pipeline, and allows more gas in the gas-liquid mixture to enter the transport sub-pipeline.

[0014] In an optional embodiment, each of the transport sub-pipelines is arranged away from the discharge pipeline relative to the confluence sub-pipeline.

[0015] In an optional embodiment, the kettle body includes an upper kettle body and a lower kettle body, the upper kettle body and the lower kettle body are connected to form the kettle body, and grooves are formed on the upper kettle body and the lower kettle body, and the two grooves are connected to form a accommodating cavity of the kettle body, and the accommodating cavity is suitable for forming the separation flow channel.

[0016] In an optional embodiment, it further includes at least one partition, all of which are arranged in the groove and are suitable for forming a separation channel, and the gas-liquid mixture is suitable for flowing along the separation channel in the containing chamber to perform gas-liquid separation.

[0017] Beneficial effect: By arranging a partition in the groove to form a separation flow channel, the flow path of the gas-liquid mixture in the accommodating chamber is effectively extended, so that when the gas-liquid mixture is output from the opening of the kettle body, there is more time for the gas to float to the corresponding position of the upper kettle body relative to the coolant, and the gas-liquid separation effect is good.

[0018] In an optional embodiment, the partition is provided with two, namely a first partition and a second partition, both of which are arranged in the lower pot body, and the first partition is suitable for being placed horizontally in the accommodating cavity, and the second partition is suitable for being placed longitudinally in the accommodating cavity, and one end of the second partition is suitable for extending into the conveying pipeline and being aligned with the diverter plate.

[0019] Beneficial effect: By setting up two partitions, the first partition and the second partition are arranged horizontally and vertically to form a separation channel, so that the gas-liquid mixture can flow along one side of the second partition to the first partition, and then flow from the second partition to the other side of the first partition, completing the gas-liquid separation in the process of flow, the installation method is simple, and the gas-liquid separation effect is good.

[0020] In an optional embodiment, at least two upper baffles and two lower baffles are respectively arranged in the grooves of the upper kettle body and the lower kettle body, and the upper baffles located in the groove of the upper kettle body are aligned with the lower baffles located in the groove of the lower kettle body, wherein one of the lower baffles is aligned with the diverter plate corresponding to the opening;

[0021] At least one first notch is opened at one end of any upper baffle away from the opening to form an air flow channel; and / or, avoiding the lower baffle aligned with the diverter plate, a second notch is opened at one end of each of the other lower baffles away from the first notch to form a liquid flow channel.

[0022] Beneficial effect: by respectively arranging at least two upper partitions and two lower partitions in the grooves of the upper pot body and the lower pot body, the upper partitions in the groove of the upper pot body are aligned one by one with the lower partitions in the groove of the lower pot body, and the corresponding openings of one of the lower partitions are aligned with the diverter plate, and then a first notch is opened on the end of the upper partition away from the opening, and a second notch is opened on the end of the lower partition away from the first notch. When the gas-liquid mixture flows in the accommodating chamber, the gas in the gas-liquid mixture can float up and the gas at different positions can flow and converge along the air flow channel. At the same time, the coolant flows accordingly along the liquid flow channel formed by the second notch opened at the end of the lower partition away from the first notch, thereby further improving the gas-liquid separation effect.

[0023] In an optional embodiment, when the first notch and the second notch are respectively formed on the upper partition and the corresponding lower partition, the first notch and the second notch are arranged to overlap with the orthographic projection of the lower kettle body.

[0024] Beneficial effect: By respectively opening the corresponding first notch and the second notch on the upper partition and the lower partition, the flow path of the gas-liquid mixture in the accommodating cavity can be effectively extended, and the first notch and the second notch are arranged to overlap in the orthographic projection of the lower pot body, and the molding method is simple.

[0025] In an optional embodiment, there is a gap between the first notch and the second notch and the corresponding inner wall surfaces of the upper kettle body and the lower kettle body.

[0026] Beneficial effect: By providing a gap between the first notch and the second notch and the corresponding inner wall surfaces of the upper pot body and the lower pot body, the gas-liquid mixture can flow stably in the containing cavity and separate from the gas and liquid.

[0027] In an optional embodiment, a minimum water level scale line and a maximum water level scale line are set on the kettle body, and the minimum water level scale line is not lower than the joint between the upper kettle body and the lower kettle body.

[0028] A cooling system comprises: a cooling pipeline; an expansion kettle, wherein the expansion kettle is the expansion kettle as described above, and a kettle body of the expansion kettle is connected to the cooling pipeline through a conveying pipeline.

[0029] Beneficial effects: The cooling system adopts the above-mentioned expansion kettle, so it has all the beneficial effects of the above-mentioned expansion kettle, and when the cooling system is in use, it has a good cooling effect on the battery, effectively extending the service life of the battery.

[0030] A vehicle comprises a cooling system, wherein the cooling system is the cooling system described above.

[0031] Beneficial effects: The vehicle adopts the above-mentioned cooling system, and thus has all the beneficial effects of the above-mentioned cooling system.

[0032] Beneficial effects of the utility model:

[0033] (1) The expansion kettle of the utility model is provided with a separation channel in the kettle body, and the gas-liquid mixture is separated by the separation channel. Then, an opening is opened at the lower end of the kettle body, and one end of the delivery pipeline of the delivery pipeline group is arranged corresponding to the opening, and the other end of the delivery pipeline is connected to the cooling pipeline of the battery cooling system. The delivery pipeline has a separate confluence pipeline and at least one delivery sub-pipeline, and each discharge pipeline is connected to the confluence sub-pipeline, so that each discharge pipeline is connected to the kettle body through the confluence sub-pipeline. At the same time, a pressure water tank cover is provided at the liquid filling port on the kettle body. When the coolant needs to be circulated in the cooling pipeline and the expansion water tank to achieve the effect of gas-liquid separation, the gas-liquid mixture discharged from the cooling pipeline enters the delivery pipeline, and because the delivery pipeline has a separate confluence pipeline and a delivery sub-pipeline, part of the gas-liquid mixture will enter the kettle body along the delivery sub-pipeline, and the separation flow channel will be used to separate the gas-liquid mixture, and the coolant after the diversion will be output from the kettle body to the confluence sub-pipeline along the outlet, and flow along one end of the confluence sub-pipeline to the discharge pipeline, while the other part of the gas-liquid mixture will directly flow along the confluence sub-pipeline to the discharge pipeline. The other end of the sub-pipeline flows into the exhaust pipeline to enter the cooling pipeline, and the gas-liquid mixture in the cooling pipeline enters the delivery pipeline again, thereby circulating, and finally achieving the effect of gradually emptying the air in the cooling pipeline, ensuring the normal circulation of the coolant in the cooling system, and further ensuring the cooling effect on the battery. The arrangement of the delivery pipeline group is to open an opening to realize the inflow and output of the gas-liquid mixture, without opening multiple openings on the kettle body and plugging multiple connecting pipes, which can effectively reduce the molding process and the complexity of installation. At the same time, the gas in the gas-liquid mixture will be in the kettle body. The gas in the kettle body continues to accumulate. When the gas pressure in the kettle body is greater than the predetermined pressure, the gas in the kettle body will be discharged from the pressure water tank cover along the filling port. The discharge method adopts a self-exhaust method with good exhaust effect. The kettle cover at the filling port can be used for exhaust without the user's participation in rotating the cover. The exhaust method is convenient, and the coolant in the kettle body is isolated from the atmosphere. When used for a long time, the coolant will not evaporate and disappear in large quantities naturally, avoiding the situation of a large amount of coolant loss. The user does not need to refill frequently, but only needs to regularly observe the usage of the coolant and refill it accordingly, thereby improving the user's convenience.

[0034] (2) The expansion kettle of the utility model uses a diverter plate to separate the delivery pipeline into a collecting sub-pipeline and at least one delivery sub-pipeline. This molding method is simple and reduces the difficulty of process molding. In addition, a corresponding opening is set at one end of the diverter plate, which can enable part of the gas-liquid mixture to enter the kettle body along an opening on one side of the diverter plate, and then be output from the kettle body along an opening on the other side of the diverter plate, without the need to set multiple openings.

[0035] (3) The expansion kettle of the utility model sets the axes of the conveying sub-pipeline and the converging sub-pipeline at an angle to the horizontal direction, and utilizes the property of gas that has a smaller density and will rise along the liquid, so that the gas-liquid mixture in the conveying sub-pipeline contains more gas than the gas in the converging sub-pipeline, thereby achieving the effect of pre-gas-liquid separation of the gas-liquid mixture and further improving the efficiency of gas-liquid separation.

[0036] (4) The expansion kettle of the utility model sets the axes of the conveying sub-pipeline and the converging sub-pipeline at an angle of 45° to the horizontal direction. This angle setting method facilitates the gas-liquid mixture to be diverted to the conveying sub-pipeline and the converging sub-pipeline, and enables more gas in the gas-liquid mixture to enter the conveying sub-pipeline.

[0037] (5) The expansion kettle of the utility model effectively prolongs the flow path of the gas-liquid mixture in the accommodating chamber by arranging a partition in the groove to form a separation flow channel, so that when the gas-liquid mixture is output from the kettle body from the opening, there is more time for the gas to float to the corresponding position of the upper kettle body relative to the coolant, and the gas-liquid separation effect is good.

[0038] (6) The expansion kettle of the utility model is provided with two partitions, and the first partition and the second partition are arranged horizontally and vertically to form a separation channel, so that the gas-liquid mixture can flow along one side of the second partition to the first partition, and then flow from the second partition to the other side of the first partition, and the gas-liquid separation is completed in the process of flow. The installation method is simple and the gas-liquid separation effect is good.

[0039] (7) The expansion kettle of the utility model is provided with at least two upper baffles and two lower baffles in the grooves of the upper kettle body and the lower kettle body respectively. The upper baffles in the groove of the upper kettle body are aligned with the lower baffles in the groove of the lower kettle body, and the corresponding openings of one of the lower baffles are aligned with the diverter plate. Then, a first notch is provided at an end of the upper baffle away from the opening, and a second notch is provided at an end of the lower baffle away from the first notch. When the gas-liquid mixture flows in the accommodating chamber, the gas in the gas-liquid mixture can float up and the gas at different positions can flow and converge along the air flow channel. At the same time, the coolant flows accordingly along the liquid flow channel formed by the second notch provided at the end of the lower baffle away from the first notch, thereby further improving the gas-liquid separation effect.

[0040] (8) The expansion kettle of the utility model can effectively extend the flow path of the gas-liquid mixture in the accommodating chamber by respectively opening corresponding first notches and second notches on the upper partition and the lower partition, and the first notch and the second notch are arranged to overlap in the orthographic projection of the lower kettle body, and the molding method is simple.

[0041] (9) The expansion kettle of the utility model has a gap between the first notch and the second notch and the inner wall surfaces of the corresponding upper kettle body and lower kettle body, so as to facilitate the stable flow of the gas-liquid mixture in the containing chamber and the separation of gas and liquid.

[0042] (10) The cooling system in the utility model adopts the above-mentioned expansion kettle, and thus has all the beneficial effects of the above-mentioned expansion kettle. In addition, when the cooling system is in use, it has a good cooling effect on the battery, effectively extending the service life of the battery.

[0043] (11) The vehicle in the present invention adopts the above-mentioned cooling system, and thus has all the beneficial effects of the above-mentioned cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 This is a schematic diagram of the connection structure between the delivery pipeline group and the kettle body of an embodiment of the utility model;

[0046] Figure 2 is a top view of the kettle body in the embodiment of the utility model, which is a schematic diagram of the position structure of a notch opened on the upper partition in the upper kettle body, and the first notch is arranged to overlap with the second notch;

[0047] Figure 3 A schematic diagram of a structure in which the partition is arranged as a first partition and a second partition are arranged in the accommodating cavity transversely and longitudinally respectively;

[0048] Description of reference numerals:

[0049] 100. Pot body;

[0050] 101, opening; 1011, first opening; 1012, second opening;

[0051] 102, liquid filling port; 103, upper kettle body; 104, lower kettle body; 105, containing chamber;

[0052] 200, delivery pipeline group; 201, delivery pipeline; 2011, confluence sub-pipeline; 2012, delivery sub-pipeline;

[0053] 202, discharge pipeline; 203, diverter plate;

[0054] 300. Pressure water tank cover;

[0055] 400, partition; 401, first partition; 402, second partition; 403, upper partition; 4031, first notch;

[0056] 404, lower partition;

[0057] 500, the lowest water level mark; 600, the highest water level mark. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0059] Combine the following Figures 1 to 3 , describing an embodiment of the utility model.

[0060] According to an embodiment of the present invention, on the one hand, an expansion kettle is provided, see Figure 1-Figure 3 , comprising a kettle body 100, a delivery pipeline group 200 and a pressure water tank cover 300, wherein a separation flow channel is arranged in the kettle body 100, and when the gas-liquid mixture is input and output in the kettle body 100, the gas-liquid mixture flows along the separation flow channel, and the gas-liquid mixture is separated by the separation flow channel during the flow, and then an opening 101 is opened at the lower end of the kettle body 100, and the delivery pipeline group 200 is arranged at the lower end of the kettle body 100, and the delivery pipeline group 200 includes a delivery pipeline 201 and a discharge pipe Road 202, one end of the delivery pipeline 201 is set corresponding to the opening, the other end of the delivery pipeline 201 is connected to the cooling pipeline of the battery cooling system, and the delivery pipeline 201 has a separate confluence sub-pipeline 2011 and a delivery sub-pipeline 2012, the discharge pipeline 202 is connected to the confluence sub-pipeline 2011, so that all the discharge pipelines 202 are connected to the kettle body through the confluence sub-pipeline 2011, a liquid filling port 102 is set on the kettle body, and the pressure water tank cover 300 is covered at the liquid filling port 102.

[0061] In actual use, a separation channel is set in the kettle body 100, and the gas-liquid mixture is separated by using the separation channel. Then, an opening 101 is opened at the lower end of the kettle body 100, and then one end of the delivery pipeline 201 of the delivery pipeline group 200 is set corresponding to the opening, and the other end of the delivery pipeline 201 is connected to the cooling pipeline of the battery cooling system, and the delivery pipeline 201 has a separate confluence sub-pipeline 2011 and at least one delivery sub-pipeline 2012, and each discharge pipeline 202 is connected to the confluence sub-pipeline 2011, so that each discharge pipeline 202 is connected to the kettle body through the confluence sub-pipeline 2011, and at the same time, the heating on the kettle body A pressure water tank cover 300 is provided at the liquid inlet 102. When the coolant needs to be circulated in the cooling pipeline and the expansion water tank to achieve the effect of gas-liquid separation, the gas-liquid mixture discharged from the cooling pipeline enters the delivery pipeline 201, and since the delivery pipeline 201 has a separate confluence sub-pipeline 2011 and a delivery sub-pipeline 2012, part of the gas-liquid mixture will enter the kettle body along the delivery sub-pipeline 2012, and the gas-liquid separation of this part of the gas-liquid mixture will be performed by the separation flow channel, and the diverted coolant will be output from the kettle body to the confluence sub-pipeline 2011 along the outlet, and flow along one end of the confluence sub-pipeline 2011 to the discharge pipeline. 202, while the other part of the gas-liquid mixture directly flows along the other end of the conduit 2011 to the exhaust pipe 202 to enter the cooling pipe, and the gas-liquid mixture in the cooling pipe enters the delivery pipe 201 again, thereby circulating, and finally achieving the effect of gradually emptying the air in the cooling pipe, ensuring the normal circulation of the coolant in the cooling system, and further ensuring the cooling effect on the battery, and the arrangement of the delivery pipe group 200 opens an opening to realize the inflow and output of the gas-liquid mixture, without opening multiple openings on the kettle body and plugging multiple connecting pipes, which can effectively reduce the molding process and the complexity of installation, and the gas The gas in the liquid mixture will continue to accumulate in the upper part of the kettle body. When the gas pressure in the kettle body is greater than the predetermined pressure, the gas in the kettle body will be discharged from the pressure water tank cover 300 along the liquid filling port 102. The discharge method adopts a self-exhaust method with good exhaust effect. The kettle cover at the liquid filling port 102 can be used for exhaust without the user's participation in rotating the cover. The exhaust method is convenient, and the coolant in the kettle body is isolated from the atmosphere. When used for a long time, the coolant will not produce a large amount of natural evaporation and disappear, avoiding the situation of a large amount of coolant loss. The user does not need to refill frequently, but only needs to regularly observe the usage of the coolant and refill it accordingly, thereby improving the user's convenience.

[0062] Specifically, the delivery pipeline group 200 in this embodiment can be provided with a delivery sub-pipeline 2012 and a confluence sub-pipeline 2011, and of course, it can also be two delivery sub-pipelines 2012, or three delivery sub-pipelines 2012, and the confluence sub-pipeline 2011 is set as one, and all the delivery sub-pipelines 2012 and the confluence sub-pipeline 2011 are separated and arranged, thereby realizing that part of the gas-liquid mixture can be transported into the kettle body by using the delivery sub-pipeline 2012, and part of the gas-liquid mixture flows along the confluence sub-pipeline 2011 to the discharge pipeline 202, and converges with the coolant that completes the gas-liquid separation from the kettle body in the confluence sub-pipeline 2011, and also flows into the discharge pipeline 202, and enters the cooling pipeline again to participate in the cooling of the battery.

[0063] In order to reduce the difficulty of process molding, such as Figure 1-Figure 3 As shown, the delivery pipeline group 200 in this embodiment also includes a diverter plate 203. Specifically, at least one diverter plate 203 can be set in the delivery pipeline 201, and one end of the diverter plate 203 is set corresponding to the opening 101, and the other end is located in the delivery pipeline 201, so that the delivery pipeline 201 is divided into a converging sub-pipeline 2011 and at least one delivery sub-pipeline 2012. The method of using the diverter plate 203 to form the converging sub-pipeline 2011 and at least one delivery sub-pipeline 2012 is simple, which reduces the difficulty of process molding, and one end of the diverter plate 203 is set corresponding to the opening 101, which can enable part of the gas-liquid mixture to enter the kettle body along one side opening of the diverter plate 203, and then be output from the kettle body along the other side opening of the diverter plate 203, without setting multiple openings.

[0064] In actual use, the diverter plate 203 is a common plate body, which can divert the gas-liquid mixture flowing from the cooling pipeline to the delivery pipeline 201 to achieve the diversion effect. At the same time, the number of diverter plates 203 can be set to one, or to two or more, and the specific number shall be based on actual use.

[0065] Preferably, Figure 1 As shown, the diverter plate 203 in this embodiment is set as one, dividing the delivery pipeline 201 into a delivery sub-pipeline 2012 and a converging sub-pipeline 2011, thereby the gas-liquid mixture is divided into two flows, one flowing into the delivery sub-pipeline 2012, and the other flowing into the converging sub-pipeline 2011.

[0066] The liquid filling port 102 in this embodiment is formed on the upper kettle body 103. After the diverter plate 203 is aligned with the corresponding partition, the opening 101 is divided into a first opening 1011 and a second opening 1012. The gas-liquid mixture flows into the kettle body along the first opening 1011, and the coolant after the gas-liquid separation flows into the collector pipe 2011 along the second opening 1012.

[0067] In order to perform pre-gas-liquid separation on the gas-liquid mixture during the process of diverting the gas-liquid mixture by the diverter plate 203, the axes of the above-mentioned each transport sub-pipeline 2012 and the confluence sub-pipeline 2011 can be set at an angle to the horizontal direction, and the gas has a smaller density and will rise along the liquid. In actual use, the gas density in the gas-liquid mixture is less than the density of the coolant. Therefore, the gas will float relative to the coolant, so that the gas-liquid mixture in the transport sub-pipeline 2012 contains more gas than the gas in the confluence sub-pipeline 2011, thereby achieving the effect of pre-gas-liquid separation of the gas-liquid mixture and further improving the efficiency of gas-liquid separation.

[0068] In actual use, the axes of the above-mentioned transport sub-pipelines 2012 and the axis of the confluence sub-pipeline 2011 can be set at a 45° angle to the horizontal direction. This angle setting method facilitates the gas-liquid mixture to be diverted to the transport sub-pipeline 2012 and the confluence sub-pipeline 2011, and allows more gas in the gas-liquid mixture to enter the transport sub-pipeline 2012.

[0069] It should be noted that the above-mentioned delivery pipeline 201 is set as a circular tube, and an extension portion is set at the opening of the above-mentioned kettle body, and the circular tube is sleeved on the extension portion. Therefore, the cross-sections of the separated delivery sub-pipeline 2012 and the converging sub-pipeline 2011 can both be parts of the circular tube. When the diverter plate 203 is set as one, the diverter plate 203 is set at the center position of the circular tube, so that the delivery sub-pipeline 2012 and the converging sub-pipeline 2011 are symmetrically formed, and the cross-sections of the two are semicircular, and then the axis of the delivery sub-pipeline 2012 and the axis of the converging sub-pipeline 2011 are both along the axis on the cross-section.

[0070] like Figure 1 and Figure 3 As shown, the above-mentioned transport sub-pipelines 2012 are arranged relative to the above-mentioned confluence sub-pipeline 2011 and away from the above-mentioned discharge pipeline 202, and there is no need to bypass the pipeline, which is beneficial to reducing the volume occupied by the expansion kettle.

[0071] like Figure 1 As shown, the above-mentioned kettle body 100 in this embodiment includes an upper kettle body 103 and a lower kettle body 104, and the upper kettle body 103 and the lower kettle body 104 are butt-jointed to form the above-mentioned kettle body 100, and grooves are formed on the upper kettle body 103 and the lower kettle body 104, and the two grooves are butt-jointed to form a accommodating cavity 105 of the kettle body, and a separation flow channel suitable for gas-liquid separation of the gas-liquid mixture is formed in the accommodating cavity 105.

[0072] In actual use, the upper kettle body 103 and the lower kettle body 104 can be butt-jointed by welding to form the kettle body 100 .

[0073] In order to form a separation flow channel, the kettle body in this embodiment also includes a partition 400, and the number of the partitions 400 is set to at least one, and all the partitions 400 are arranged in the grooves of the upper kettle body 103 and the lower kettle body 104, and are suitable for forming a separation flow channel. The gas-liquid mixture is suitable for flowing along the separation flow channel in the accommodating chamber 105 to perform gas-liquid separation. By arranging the partition 400 in the groove to form the separation flow channel, the flow path of the gas-liquid mixture in the accommodating chamber 105 is effectively extended, so that when the gas-liquid mixture is output from the opening of the kettle body, there is more time for the gas to float to the corresponding position of the upper kettle body 103 relative to the coolant, and the gas-liquid separation effect is good.

[0074] In actual use, Figure 3 As shown, the above-mentioned partition 400 can be set to two, namely a first partition 401 and a second partition 402, both of which are arranged in the lower kettle body 104, and the first partition 401 is suitable for being placed horizontally in the groove of the lower kettle body 104, so as to be arranged horizontally in the accommodating cavity 105 of the kettle body, and the second partition 402 is suitable for being placed longitudinally in the groove of the lower kettle body 104, and the end surface portion of the second partition 402 close to the first partition 401 is abutted against the side surface of the first partition 401, so as to be arranged longitudinally in the accommodating cavity 105 of the kettle body, and at the same time, One end of the second partition 402 extends into the delivery pipeline 201, and the second partition 402 is aligned with the diverter plate 203, so that the gas-liquid mixture can flow along one side of the second partition 402 to the first partition 401, and then flow from the second partition 402 to the other side of the first partition 401. Gas-liquid separation is completed in the process of flowing. The installation method is simple and the gas-liquid separation effect is good. After flowing out of the kettle body from the other side of the first partition 401, it can flow along the other side of the first partition 401 to the collector pipeline 2011 to flow into the discharge pipeline 202.

[0075] like Figure 3 As shown, the dotted line and the arrow on the dotted line indicate the direction of flow of the gas-liquid mixture along the first partition 401 and the second partition 402 in the accommodating chamber 105. The first partition 401 and the second partition 402 can be integrally formed in the groove of the lower kettle body 104, and of course, can also be separately formed.

[0076] As a convertible embodiment, at least two upper partitions 403 and two lower partitions 404 can be respectively arranged in the grooves of the upper pot body 103 and the lower pot body 104, wherein the upper partition 403 in the groove of the upper pot body 103 and the lower partition 404 in the groove of the lower pot body 104 are aligned one by one, and at the same time, one of the lower partitions 404 is aligned with the opening of the pot body 100 and the diverter plate 203, and then at least one first notch 4031 can be opened at one end of any upper partition 403 away from the opening of the pot body to form an air flow channel, and a second notch can be opened on one end of each of the other lower partitions 404 away from the first notch 4031, avoiding the lower partition 404 aligned with the diverter plate 203, to form a liquid flow channel.

[0077] At least two upper partitions 403 and two lower partitions 404 are respectively arranged in the grooves of the upper pot body 103 and the lower pot body 104, the upper partition 403 in the groove of the upper pot body 103 is aligned with the lower partition 404 in the groove of the lower pot body 104, and the corresponding opening of one of the lower partitions 404 is aligned with the diverter plate 203, and then a first notch 4031 is opened on the end of the upper partition 403 away from the opening, and a second notch is opened on the end of the lower partition 404 away from the first notch 4031. When the gas-liquid mixture flows in the accommodating chamber 105, the gas in the gas-liquid mixture can float up and the gas at different positions can flow and converge along the air flow channel. At the same time, the coolant flows accordingly along the liquid flow channel formed by the second notch opened on the end of the lower partition 404 away from the first notch 4031, thereby further improving the gas-liquid separation effect.

[0078] In actual use, Figure 1 and Figure 2 As shown, the upper partitions 403 are cross-spaced and arranged in parallel in the same direction. Correspondingly, the lower partitions 404 are cross-spaced and arranged in parallel in the same direction, thereby forming a grid-like partition structure in the accommodating chamber 105. At the same time, in order to ensure the stable flow of the gas-liquid mixture in the accommodating chamber 105, the upper partitions 403 and the lower partitions 404 can be evenly spaced in corresponding grooves to avoid impact on the gas-liquid mixture due to changes in the spacing distance, which causes obvious shaking of the gas-liquid mixture.

[0079] Among them, when the first notch 4031 and the second notch are respectively opened on the upper partition 403 and the corresponding lower partition 404, the first notch 4031 and the second notch are arranged to overlap in the orthographic projection of the lower kettle body 104. A notch can be opened on the upper partition 403 and the lower partition 404. Of course, multiple notches can be opened on the basis of ensuring the strength of use. The specific opening shall be based on actual use. It can effectively extend the flow path of the gas-liquid mixture in the accommodating chamber 105, and the first notch 4031 and the second notch are arranged to overlap in the orthographic projection of the lower kettle body 104, and the molding method is simple.

[0080] like Figure 1 and Figure 2 As shown, the number of upper partitions 403 and lower partitions 404 in this embodiment is set to three, the upper partitions 403 are defined as the first upper partition, the second upper partition and the third upper partition, the lower partitions 404 are defined as the first lower partition, the second lower partition and the third lower partition, the second upper partition is located between the first upper partition and the third upper partition, the second lower partition is located between the first lower partition and the third lower partition, and then one end of the second lower partition is extended into the conveying pipeline 201 and aligned with the diverter plate 203, and each partition 400 is abutted against the side wall of the kettle body 100 without a gap.

[0081] In order to collect the gas in the kettle body to the upper end of the kettle body 100, a gap may be provided between the first notch 4031 and the corresponding inner wall surface of the upper kettle body 103. After gas-liquid diversion, the gas in the gas mixture can be collected to the upper end of the kettle body 100, so as to facilitate the gas to be discharged from the kettle body from the pressure water tank cover 300 along the liquid filling port 102 in the next step.

[0082] Correspondingly, in order to collect the coolant, a gap may be provided between the second notches and the corresponding inner wall surface of the lower kettle body 104 to facilitate the coolant to flow stably along the gap and each second notch and to separate the gas and liquid.

[0083] In actual use, the first notch 4031 and the second notch may be opened in a U-shape. Of course, they may also be semicircular, triangular or rectangular. No specific limitation is made here and specific limitation is made in actual use.

[0084] At the same time, the shapes of the first notch 4031 and the second notch (not shown in the figure) can be set to be the same or different, the shapes of each first notch 4031 can be set to be the same or different, and similarly, the shapes of each second notch can be set to be the same or different.

[0085] like Figure 1 and Figure 2As shown, the dotted line and the arrow on the dotted line indicate the flow direction of the gas-liquid mixture along the upper partition 403 and the lower partition 404 in the accommodating chamber 105. The upper partition 403 and the lower partition 404 can be integrally formed in the corresponding grooves, or they can be separately formed.

[0086] In order to prompt the user of the specific water level of the coolant to meet the use requirements of the coolant, a minimum water level scale line 500 and a maximum water level scale line 600 can be set on the kettle body. The minimum water level scale line 500 is not lower than the joint between the upper kettle body 103 and the lower kettle body 104.

[0087] The working principle of the present invention is as follows: open the pressure water tank cover 300 of the expansion kettle, add coolant into the expansion kettle, when the coolant is added to the highest water level mark 600, start the electronic auxiliary water pump in the cooling system, and the coolant in the cooling system starts to circulate, the coolant flows from the cooling pipeline into the A of the delivery pipeline 201, and starts to be diverted through the diverter plate 203, the coolant containing gas in the upper part of the delivery pipeline 201 flows into the kettle body 100 of the expansion kettle from the first opening 1011 through the delivery sub-pipeline 2012B, and then flows in the accommodating cavity 105 along the notches of each partition 400, At the same time, the coolant flows from C around the partitions to D along the second notch of the lower partition 404 of the lower kettle body 104, and the gas-containing coolant realizes gas-liquid separation in the process of flowing through the expansion kettle. The coolant after gas-liquid separation is output from the kettle body 100 along the second opening 1012, and then flows into the cooling pipeline from the discharge pipeline 202 along the conduit 2011, while the other part of the gas-liquid mixture diverted to the conduit 2011 directly flows along the lower part of the conduit 2011 to the discharge pipeline 202. After a certain period of circulation, the exhaust function of the cooling system is finally completed.

[0088] According to an embodiment of the utility model, on the other hand, a cooling system is also provided, which includes a cooling pipeline and the above-mentioned expansion kettle, and the kettle body 100 of the expansion kettle is connected to the cooling pipeline through the delivery pipeline 201. When the cooling system is in use, it has a good cooling effect on the battery, effectively prolongs the service life of the battery, and a delivery pipeline group 200 can be arranged in the expansion kettle to complete the connection with the cooling pipeline.

[0089] According to an embodiment of the utility model, on the other hand, a vehicle is provided, which includes the above-mentioned cooling system. The cooling effect of the vehicle using the cooling system is good, and it is convenient to discharge the gas in the cooling pipeline and add the coolant, which is convenient for users to use and can also reduce the cost of the whole vehicle.

[0090] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An expansion kettle, characterized in that: include: A kettle body (100), wherein a separation channel is arranged in the kettle body (100), wherein the separation channel is suitable for performing gas-liquid separation on a gas-liquid mixture, and an opening (101) is provided at the lower end of the kettle body (100); A delivery pipeline group (200) is arranged at the lower end of the kettle body (100), comprising a delivery pipeline (201) and at least one discharge pipeline (202); one end of the delivery pipeline (201) is arranged corresponding to the opening (101), and the other end is connected to a cooling pipeline of a battery cooling system; the delivery pipeline (201) comprises a separate conduit (2011) and at least one delivery sub-pipeline (2012); each discharge pipeline (202) is connected to the conduit (2011) so that each discharge pipeline (202) is connected to the kettle body (100) through the conduit (2011); A pressure water tank cover (300), wherein a liquid filling port (102) is arranged on the kettle body (100), and the pressure water tank cover (300) is arranged to cover the liquid filling port (102); The delivery pipeline (201) is suitable for receiving the gas-liquid mixture discharged from the cooling pipeline, and part of the gas-liquid mixture is suitable for flowing into the kettle body (100) along each of the delivery sub-pipelines (2012) so that the separation channel can perform gas-liquid separation on the gas-liquid mixture, and the cooling liquid after the gas-liquid separation is output from the kettle body (100) and flows along one end of the confluence sub-pipeline (2011) to the discharge pipeline (202) so as to be delivered to the cooling pipeline of the battery cooling system, and part of the gas-liquid mixture flows along the other end of the confluence sub-pipeline (2011) to the discharge pipeline (202); When the gas pressure in the kettle body (100) is greater than a predetermined pressure, the gas in the kettle body (100) is suitable for being discharged from the kettle body (100) along the liquid filling port (102) from the pressure water tank cover (300).

2. The expansion kettle according to claim 1, characterized in that: The delivery pipeline group (200) further comprises a flow divider (203), at least one flow divider (203) being arranged in the delivery pipeline (201), and one end of the flow divider (203) being arranged corresponding to the opening (101) so as to divide the delivery pipeline (201) into a converging sub-pipeline (2011) and at least one delivery sub-pipeline (2012).

3. The expansion kettle according to claim 1 or 2, characterized in that: The axis of each of the transport sub-pipelines (2012) and / or the confluence sub-pipeline (2011) is arranged to form an angle with the horizontal direction.

4. The expansion kettle according to claim 3, characterized in that: The axis of each of the transport sub-pipelines (2012) and / or the confluence sub-pipeline (2011) is arranged at an angle of 45° to the horizontal direction.

5. The expansion kettle according to claim 1 or 2, characterized in that: Each of the transport sub-pipelines (2012) is arranged relative to the confluence sub-pipeline (2011) and away from the discharge pipeline (202).

6. The expansion kettle according to claim 2, characterized in that: The kettle body (100) comprises an upper kettle body (103) and a lower kettle body (104), wherein the upper kettle body (103) and the lower kettle body (104) are butt-jointed to form the kettle body (100), and grooves are formed on both the upper kettle body (103) and the lower kettle body (104), and the two grooves are butt-jointed to form a receiving cavity (105) of the kettle body (100), and the receiving cavity (105) is suitable for forming the separation flow channel.

7. The expansion kettle according to claim 6, characterized in that It also includes at least one partition (400), all of which are arranged in the groove and are suitable for forming a separation flow channel, and the gas-liquid mixture is suitable for flowing along the separation flow channel in the accommodating chamber (105) to perform gas-liquid separation.

8. The expansion kettle according to claim 7, characterized in that The partition (400) is provided in two pieces, namely a first partition (401) and a second partition (402), both of which are provided in the lower kettle body (104), and the first partition (401) is suitable for being placed transversely in the accommodating cavity (105), and the second partition (402) is suitable for being placed longitudinally in the accommodating cavity (105), and one end of the second partition (402) is suitable for extending into the conveying pipeline (201) and being aligned with the diverter plate (203).

9. The expansion kettle according to claim 7, characterized in that: At least two upper baffles (403) and two lower baffles (404) are respectively arranged in the grooves of the upper kettle body (103) and the lower kettle body (104); the upper baffles (403) in the groove of the upper kettle body (103) and the lower baffles (404) in the groove of the lower kettle body (104) are arranged one by one in alignment, wherein one of the lower baffles (404) is arranged in alignment with the diverter plate (203) corresponding to the opening (101); At least one first notch (4031) is formed on one end of any upper partition (403) away from the opening (101) to form an air flow channel; and / or, avoiding the lower partition (404) aligned with the diverter plate (203), a second notch is formed on one end of each of the other lower partitions (404) away from the first notch to form a liquid flow channel.

10. The expansion kettle according to claim 9, characterized in that When the first notch (4031) and the second notch are respectively formed on the upper partition (403) and the corresponding lower partition (404), the orthographic projections of the first notch (4031) and the second notch on the lower kettle body (104) overlap.

11. The expansion kettle according to claim 9, characterized in that There is a gap between the first notch (4031) and the second notch and the corresponding inner wall surfaces of the upper kettle body (103) and the lower kettle body (104).

12. The expansion kettle according to claim 9, characterized in that A minimum water level scale line (500) and a maximum water level scale line (600) are provided on the kettle body (100), and the minimum water level scale line (500) is not lower than the joint between the upper kettle body (103) and the lower kettle body (104).

13. A cooling system, characterized in that: include: Cooling pipes; An expansion kettle, wherein the expansion kettle is the expansion kettle as claimed in any one of claims 1 to 12, and the kettle body (100) of the expansion kettle is connected to the cooling pipeline through a conveying pipeline (201).

14. A vehicle, characterized in that: It comprises a cooling system, and the cooling system is the cooling system according to claim 13.

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