Pressure relief assembly, battery system and aircraft

Abstract

The utility model discloses a pressure relief assembly, battery system and aircraft relates to pressure relief technical field, wherein the pressure relief assembly includes seat body, fluid joint and first pressure relief device, seat body includes the seat body that is equipped with the first cavity, and is equipped with first interface portion, second interface portion and third interface portion that are all equipped on the seat body and are respectively communicated with the first cavity, the fluid connector is used for being arranged on the first connector part and provided with a valve element so that the fluid connector can have a first conducting state and a first closing state, and the first pressure relief device is used for being arranged on the second connector part. According to the technical scheme, the function of the pressure relief assembly is enriched.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief, and particularly relates to a pressure relief assembly, a battery system and an aircraft. Background Art

[0002] As the name implies, a pressure relief assembly is a structure that can be used for pressure relief. The pressure relief assembly is used to connect pipelines. The pressure relief assembly includes a pressure relief device for relieving pressure in the pipeline. When the pressure in the pipeline reaches a preset value, the pressure relief device relieves the pressure in the pipeline. It can be understood that the pressure in the pipeline can be hydraulic pressure, the pipeline allows liquid to flow through, and the pressure relief device is used to release the liquid to reduce the pressure in the pipeline. Of course, the pressure in the pipeline can also be air pressure, the pipeline allows gas to flow through, and the pressure relief device is used to release the gas to reduce the pressure in the pipeline.

[0003] However, the current pressure relief assembly has a relatively single function and only has a pressure relief function. Summary of the Utility Model

[0004] The main object of the utility model is to propose a pressure relief assembly, a battery system and an aircraft, aiming to enrich the functions of the pressure relief assembly.

[0005] To achieve the above object, the pressure relief assembly proposed by the utility model includes:

[0006] A seat body, including a seat main body provided with a first cavity, and a first interface portion, a second interface portion and a third interface portion which are all arranged on the seat main body and are respectively communicated with the first cavity;

[0007] A fluid connector, which is used to be arranged on the first interface portion. The fluid connector is provided with a valve core so that the fluid connector has a first conduction state and a first closing state; and

[0008] A first pressure relief device, which is used to be arranged on the second interface portion.

[0009] In an embodiment, the first interface portion and the second interface portion are different interface portions.

[0010] In an embodiment, the second interface portion is arranged outside the seat main body. The first pressure relief device includes a first cover body threadedly connected to the outer periphery of the second interface portion, and a first pressure relief diaphragm covering the second interface portion. The first cover body is provided with a first annular pressing portion opposite to the first pressure relief diaphragm, and the first annular pressing portion is used to press the first pressure relief diaphragm against the second interface portion.

[0011] In an embodiment, a first pressure relief groove is formed on the surface of the first pressure relief diaphragm.

[0012] In one embodiment, the first interface portion and the second interface portion are disposed on the same side of the base body in parallel, and the first interface portion and the second interface portion have the same orientation.

[0013] In one embodiment, the third interface portion is provided with a threaded connection structure;

[0014] And / or, the fluid connector is threadedly connected to the first interface portion;

[0015] And / or, the fluid connector is provided with a plug-in conduction structure.

[0016] In one embodiment, the first interface portion and the second interface portion are the same interface portion, and the fluid connector and the first pressure relief device are alternatively installed on the first interface portion.

[0017] In one embodiment, the first pressure relief device includes a pressure relief joint body having a second cavity, a fourth interface portion and a fifth interface portion respectively disposed on the pressure relief joint body and communicating with the second cavity, the fourth interface portion is used for connecting with the second interface portion, the first pressure relief device further includes a first cover threadedly connected to the fifth interface portion, and a first pressure relief diaphragm covering the fifth interface portion, the first cover is provided with a first annular pressing portion opposite to the first pressure relief diaphragm, and the first annular pressing portion is used for pressing the first pressure relief diaphragm against the fifth interface portion.

[0018] In one embodiment, a first pressure relief groove is formed on the surface of the first pressure relief diaphragm.

[0019] In one embodiment, the fourth interface portion and the fifth interface portion are respectively disposed at two ends of the pressure relief joint body, and the fourth interface portion and the fifth interface portion have opposite orientations.

[0020] In one embodiment, the fluid connector includes a fluid connector body having a third cavity, and a sixth interface portion, a seventh interface portion and an eighth interface portion respectively disposed on the fluid connector body and communicating with the third cavity, the sixth interface portion is used for connecting with the first interface portion, and the eighth interface portion is provided with a second pressure relief device.

[0021] In one embodiment, the second pressure relief device is configured as a pressure relief valve, an explosion-proof valve, an explosion-proof membrane or a pressure relief breathing valve.

[0022] In one embodiment, the second pressure relief device includes a second cover threadedly connected to the outer periphery of the eighth interface portion, and a second pressure relief diaphragm covering the eighth interface portion, the second cover is provided with a second annular pressing portion opposite to the second pressure relief diaphragm, and the second annular pressing portion is used for pressing the second pressure relief diaphragm against the eighth interface portion.

[0023] In one embodiment, a second pressure relief groove is formed on the surface of the second pressure relief diaphragm.

[0024] In one embodiment, the sixth interface portion and the seventh interface portion are respectively disposed at two ends of the fluid connector body, and the orientations of the sixth interface portion and the seventh interface portion are opposite to each other. The eighth interface portion is disposed on the outer peripheral surface of the fluid connector body, and the orientation of the eighth interface portion is different from those of the sixth interface portion and the seventh interface portion respectively.

[0025] In one embodiment, the first interface portion is provided with a plugging conduction structure, and the fluid connector and the first pressure relief device are selectively plugged into the plugging conduction structure.

[0026] In one embodiment, the first pressure relief device is configured as a pressure relief valve, an explosion-proof valve, an explosion-proof film or a pressure relief breathing valve.

[0027] The present utility model further provides a battery system, comprising:

[0028] A battery pack, including a battery module, the battery module including a housing having a receiving cavity and battery cells disposed in the receiving cavity; and

[0029] An integrated pipeline, communicating with the receiving cavity;

[0030] The aforementioned pressure relief assembly, the third interface portion connecting the integrated pipeline.

[0031] The present utility model further provides an aircraft, comprising:

[0032] An aircraft body; and

[0033] The aforementioned battery system, disposed on the aircraft body.

[0034] In the technical solution of the present utility model, the pressure relief assembly can be connected to a pipeline through the third interface portion. The first pressure relief device endows the pressure relief assembly with a pressure relief function, so that the pressure relief assembly can release the pressure in the pipeline. The fluid connector endows the pressure relief assembly with the function of filling and / or releasing fluid into the pipeline. Thus, the functions of the pressure relief assembly are enriched.

[0035] In addition, the first pressure relief device and the fluid connector share a seat body to be connected to the pipeline, so that the integration degree of the pressure relief assembly is relatively high. Description of the Drawings

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0037] Figure 1 Partial structural schematic diagram of the first embodiment of the aircraft provided by the present invention;

[0038] Figure 2 For Figure 1 Enlarged view of a part of the aircraft in

[0039] Figure 3 For Figure 2 Enlarged view of part C in

[0040] Figure 4 For Figure 1 Enlarged view of a part of the aircraft in

[0041] Figure 5 For Figure 4 Enlarged view of part D in

[0042] Figure 6 For Figure 1 Structural schematic diagram of the battery system in

[0043] Figure 7 For Figure 6 Enlarged view of part E in

[0044] Figure 8 For Figure 7 Structural schematic diagram of the battery module, integrated pipeline, and pressure relief assembly in

[0045] Figure 9 For Figure 3 Structural schematic diagram of the first embodiment of the pressure relief assembly in

[0046] Figure 10 For Figure 9 Exploded view of the pressure relief assembly in

[0047] Figure 11 Structural schematic diagram of the second embodiment of the pressure relief assembly provided by the present invention, where the pressure relief assembly is connected to the integrated and delivery pipes;

[0048] Figure 12 For Figure 11 Structural schematic diagram of the first pressure relief device in

[0049] Figure 13 For Figure 11 Structural schematic diagram of the fluid joint in

[0050] Description of the reference numerals in the drawings:

[0051] 100, aircraft; 200, aircraft body; 210, fuselage; 220, wing; 230, arm; 240, pressure relief port; 250, inlet and outlet; 300, ground thermal management system; 310, delivery pipe; 311, first delivery pipe; 312, second delivery pipe; 400, battery system; 410, battery pack; 411, battery module; 430, integrated pipeline; 500, pressure relief assembly; 600, seat body; 610, seat body; 620, first interface part; 630, second interface part; 640, third interface part; 700, first pressure relief device; 710, first cover; 711, first annular pressing part; 720, first pressure relief diaphragm; 721, first pressure relief groove; 730, pressure relief joint body; 740, fourth interface part; 750, fifth interface part; 800, fluid joint; 810, fluid joint body; 820, sixth interface part; 830, seventh interface part; 840, eighth interface part; 900, second pressure relief device; 910, second cover; 911, second annular pressing part; 920, second pressure relief diaphragm; 921, second pressure relief groove.

[0052] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0054] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0055] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0056] Please refer to Figures 1 to 10 , in order to enrich the functions of the pressure relief assembly 500, the present utility model proposes a pressure relief assembly 500.

[0057] In the first embodiment of the present utility model, the pressure relief assembly 500 includes a seat body 600, a fluid connector 800, and a first pressure relief device. Among them, the seat body 600 includes a seat main body 610 provided with a first cavity, and a first interface portion 620, a second interface portion 630, and a third interface portion 640 that are all provided on the seat main body 610 and are respectively communicated with the first cavity. The fluid connector 800 is used to be provided on the first interface portion 620, and the fluid connector 800 is provided with a valve core so that the fluid connector 800 has a first conduction state and a first closed state. The first pressure relief device is used to be provided on the second interface portion 630.

[0058] In this way, the pressure relief assembly 500 can be connected to a pipeline through the third interface portion 640. The first pressure relief device enables the pressure relief assembly 500 to have a pressure relief function, so that the pressure relief assembly 500 can release the pressure in the pipeline. The fluid connector 800 enables the pressure relief assembly 500 to also have the function of filling and / or releasing fluid into the pipeline. In this way, the functions of the pressure relief assembly 500 are enriched.

[0059] In addition, the first pressure relief device and the fluid connector 800 share the seat body 600 to connect with the pipeline, so that the integration degree of the pressure relief assembly 500 is relatively high.

[0060] It is worth mentioning that the fluid that can pass through the fluid connector 800 can be gas and / or liquid, and there is no limitation here. The first pressure relief device can release gas and / or liquid to relieve the pressure of the pipeline connected to the pressure relief assembly 500.

[0061] The application scenarios of the pressure relief assembly 500 are numerous. For the sake of convenience of description and without loss of generality, in this article, the application of the pressure relief assembly 500 to the aircraft 100 is taken as an example for introduction.

[0062] In an exemplary scenario, the aircraft 100 includes an aircraft body 200 and a battery system 400 disposed on the aircraft body 200. The battery system 400 includes a battery pack 410, an integrated pipeline 430, and the pressure relief assembly 500. Among them, the battery pack 410 includes battery modules 411, and the battery modules 411 include a housing provided with a receiving cavity and battery cells disposed in the receiving cavity. The integrated pipeline 430 communicates with the receiving cavity, and the third interface portion 640 of the pressure relief assembly 500 is connected to the integrated pipeline 430. The third interface portion 640 is used to conduct the integrated pipeline 430 and the first cavity.

[0063] The battery system 400 is configured with a ground thermal management system 300, and the fluid connector 800 can be communicatively disposed with the ground thermal management system 300 so that when the aircraft 100 is in a ground heat exchange state, a non-combustible gas and / or a heat exchange liquid can flow into the receiving cavity through the fluid connector 800.

[0064] It can be understood that the pipeline connected to the third interface portion 640 is the integrated pipeline 430. In this article, when the battery pack 410 undergoes a thermal runaway, the gas generated in the receiving cavity is called a thermal runaway gas, and the first pressure relief device is used to release the thermal runaway gas to reduce the pressure in the receiving cavity. The integrated pipeline 430 not only allows the non-combustible gas to flow through, but also allows the heat exchange liquid and / or the non-combustible gas to flow through, which makes the integration degree of the integrated pipeline 430 relatively high.

[0065] There are multiple integrated pipelines 430 and multiple pressure relief assemblies 500. One integrated pipeline 430 is connected to one pressure relief assembly 500. The housing is provided with a first communication port and a second communication port that are both in communication with the receiving cavity. The first communication port is connected to one integrated pipeline 430, and the second communication port is connected to another integrated pipeline 430. The first communication port is higher than the second communication port. The first communication port is used to allow the non-combustible gas to flow into the receiving cavity so that the receiving cavity is filled with the non-combustible gas, and the second communication port is used to allow the heat exchange liquid to flow into the receiving cavity so that the receiving cavity is filled with the heat exchange liquid. In this way, when a thermal runaway occurs in the battery module 411, the thermal runaway gas generated in the receiving cavity can flow to one integrated pipeline 430 through the first communication port and can also flow to another integrated pipeline 430 through the second communication port. It can be understood that pressure relief assemblies 500 are respectively provided on these two integrated pipelines 430, which is beneficial to improving the pressure relief redundancy of the battery pack 410.

[0066] The ground heat management system 300 includes a heat exchange pipeline, a liquid storage tank provided on the heat exchange pipeline, a gas storage tank provided on the heat exchange pipeline, and two liquid delivery pipes connecting the heat exchange pipeline. The liquid storage tank is used to store the heat exchange liquid, and the gas storage tank is used to store the non-combustible gas. The heat exchange pipeline is provided with a control valve so that the ground heat management system 300 has a first state in which the two delivery pipes 310 are in communication with the liquid storage tank and disconnected from the gas storage tank, and a second state in which the two delivery pipes 310 are in communication with the gas storage tank and disconnected from the liquid storage tank. It is worth mentioning that the structural design of the heat exchange pipeline can but is not limited to referring to the prior art, and will not be elaborated here too much. As long as it can enable the ground heat management system 300 to have the first state in which the two delivery pipes 310 are in communication with the liquid storage tank and disconnected from the gas storage tank, and the second state in which the two delivery pipes 310 are in communication with the gas storage tank and disconnected from the liquid storage tank.

[0067] For the convenience of description, the delivery pipe 310 that fills the non-combustible gas into the accommodation cavity through the first communication port is referred to as the first delivery pipe 311, and the delivery pipe 310 that fills the heat exchange liquid into the accommodation cavity through the second communication port is referred to as the second delivery pipe 312.

[0068] Thus, in the ground state of the aircraft 100, the first delivery pipe 311 and the second delivery pipe 312 can be respectively connected to the corresponding fluid connectors 800, and the ground thermal management system 300 enters the first state. The ground thermal management system 300 fills the accommodation cavity with heat exchange liquid through the second delivery pipe 312. Since the height of the second communication port is lower than that of the first communication port, the liquid level of the heat exchange liquid gradually rises in the accommodation cavity. The liquid level of the heat exchange liquid squeezes the non-combustible gas in the accommodation cavity, so that the non-combustible gas is discharged from the first delivery pipe 311 outside the accommodation cavity. Then, when the liquid level of the heat exchange liquid rises to the first communication port, the heat exchange liquid can be discharged from the first delivery pipe 311. Thus, in the process of the ground thermal management system 300 introducing heat exchange fluid into the accommodation cavity, it is convenient to discharge the non-combustible gas in the accommodation cavity outside the accommodation cavity, and the heat exchange liquid can continuously exchange heat with the battery cells in the accommodation cavity. When the battery cells reach the preset temperature, the ground thermal management system 300 can be made to enter the second state through the control valve. The ground thermal management system 300 delivers non-combustible gas into the accommodation cavity through the first delivery pipe 311. Since the height of the first communication port is higher than that of the second communication port, the non-combustible gas entering the accommodation cavity will press against the liquid level of the heat exchange liquid, so as to prompt the heat exchange liquid to be discharged from the second delivery pipe 312 outside the accommodation cavity, causing the liquid level of the heat exchange liquid to gradually decrease. When the heat exchange liquid level drops to the second communication port, the non-combustible gas can be discharged from the second delivery pipe 312. Thus, in the process of the ground thermal management system 300 introducing non-combustible gas into the accommodation cavity, the accommodation cavity is filled with non-combustible gas to isolate the battery cells from the air, reducing the probability of thermal runaway of the battery pack 410, and it is also convenient to discharge the heat exchange liquid in the accommodation cavity outside the accommodation cavity. In addition, after the aircraft 100 is heat-exchanged by the ground thermal management mechanism, the accommodation cavity can be filled with non-combustible gas before flight. Thus, not only the heat exchange requirement of the aircraft 100 is met, but also the aircraft 100 does not need to carry heavy heat exchange liquid for flight. In addition, the battery cells are protected by non-combustible gas during flight.

[0069] In the first embodiment, the first interface portion 620 and the second interface portion 630 are different interface portions. Thus, the pressure relief assembly 500 has a state in which the fluid connector 800 and the first pressure relief device are simultaneously connected to the seat body 600. In the ground heat exchange state of the aircraft 100, the delivery pipe 310 can be directly connected to the corresponding fluid connector 800, which is very convenient.

[0070] In the first embodiment, the fluid connector 800 has a tendency to maintain in a first closed state. Thus, when the fluid connector 800 is disconnected from the corresponding delivery pipe 310, the fluid connector 800 can change from the first conducting state to the first closed state. In this way, the self-sealing function of the fluid connector 800 is realized. This makes the pressure relief assembly 500 convenient for users. It should be noted that the fluid connector 800 having a tendency to maintain in the first closed state can be achieved but is not limited to the following ways. For example, in the first conducting state, the valve core has a first gravitational potential energy, and in the first closed state, the valve core has a second gravitational potential energy. The first gravitational potential energy is greater than the second gravitational potential energy, and the valve core relies on its own weight to make the fluid connector 800 have a tendency to maintain in the first closed state; alternatively, the fluid connector 800 has an elastic reset member connected to the valve core, and the elastic reset member makes the fluid connector 800 have a tendency to maintain in the first closed state. In some other embodiments, the fluid connector 800 does not have a tendency to maintain in the first closed state, and the user manually switches the first conducting state and the first closed state of the fluid connector 800.

[0071] In the first embodiment, the first pressure relief device is configured as a pressure relief valve, an explosion-proof valve, an explosion-proof film, or a pressure relief breathing valve.

[0072] In the first embodiment, the second interface portion 630 is provided on the outer side of the seat body 610. The first pressure relief device includes a first cover body 700 threadedly connected to the outer peripheral edge of the second interface portion 630, and a first pressure relief diaphragm 720 covering the second interface portion 630. The first cover body 700 is provided with a first annular pressing portion 711 opposite to the first pressure relief diaphragm 720, and the first annular pressing portion 711 is used to press the first pressure relief diaphragm 720 against the second interface portion 630. Thus, when a thermal runaway occurs in the battery pack 410, when the pressure received by the first pressure relief diaphragm 720 under the extrusion of the thermal runaway gas meets a preset pressure, the first pressure relief diaphragm 720 will rupture to relieve pressure on the integrated pipeline 430.

[0073] In the first embodiment, a first pressure relief groove 721 is formed on the surface of the first pressure relief diaphragm 720. In this way, the pressure increment required for the first pressure relief diaphragm 720 to deform from the start to complete rupture is reduced, which helps to prevent excessive pressure accumulation in the integrated pipeline 430, thereby protecting the safety of the integrated pipeline 430.

[0074] There are many structural forms of the seat body 600. In the first embodiment, the first interface portion 620 and the second interface portion 630 are arranged in parallel on the same side of the seat body 610, and the orientations of the first interface portion 620 and the second interface portion 630 are the same. In some other embodiments, the structural form of the seat body 600 can also be other, which is not limited here.

[0075] In the first embodiment, the third interface portion 640 is provided with a threaded connection structure. In this way, the third interface portion 640 can be more firmly connected to the integrated pipeline 430. In some other embodiments, the third interface portion 640 is provided with a snap connection structure. In this way, the third interface portion 640 can be more conveniently connected to the integrated pipeline 430.

[0076] In the first embodiment, the fluid connector 800 is threadedly connected to the first interface portion 620. In this way, the fluid connector 800 and the first interface portion 620 are more firmly connected. In some other embodiments, the fluid connector 800 is inserted into the first interface portion 620.

[0077] In the first embodiment, the fluid connector 800 is provided with an insertion conduction structure. In this way, the fluid connector 800 can be plugged by the delivery pipe 310, and enters the first conduction state when plugged with the delivery pipe 310. In this way, it is convenient for users to use.

[0078] Referring together Figures 11 to 13 , the present utility model also provides a second embodiment of the pressure relief assembly 500. The same parts of the second embodiment and the first embodiment can be referred to the first embodiment, and will not be elaborated here.

[0079] In the second embodiment, the first interface portion 620 and the second interface portion 630 are the same interface portion, and the fluid connector 800 and the first pressure relief device are alternatively installed on the first interface portion 620. In this way, the structure of the seat body 600 is relatively simplified. When it is necessary to use the heat exchange liquid to heat exchange the battery pack 410, the user can install the fluid connector 800 on the first interface portion 620 and remove the first pressure relief device from the first interface portion 620. When it is not necessary to use the heat exchange liquid to heat exchange the battery pack 410, the user can remove the fluid connector 800 from the first interface portion 620 and install the first pressure relief device on the first interface portion 620. It is worth mentioning that before the aircraft 100 takes off, the fluid connector 800 can be left on the ground and the first pressure relief device can be installed on the first interface portion 620. In this way, it is beneficial to the lightweight of the aircraft 100. In addition, it can be understood that when the first pressure relief device is connected to the first interface portion 620, if the pressure received by the first pressure relief device does not exceed its preset value, the first pressure relief device will block the integrated pipe and the external environment to prevent the non-combustible gas from flowing out of the pressure relief assembly 500 to the external environment. In this way, it is beneficial to reduce the probability of thermal runaway of the battery pack 410.

[0080] In the second embodiment, the first pressure relief device includes a pressure relief joint body 730 provided with a second cavity, a fourth interface portion 740 and a fifth interface portion 750 respectively provided on the pressure relief joint body 730 and communicating with the second cavity. The fourth interface portion 740 is used to connect with the second interface portion 630. The first pressure relief device further includes a first cover body 700 threadedly connected to the fifth interface portion 750, and a first pressure relief diaphragm 720 covering the fifth interface portion 750. The first cover body 700 is provided with a first annular pressing portion 711 opposite to the first pressure relief diaphragm 720, and the first annular pressing portion 711 is used to press the first pressure relief diaphragm 720 against the fifth interface portion 750. Thus, when the battery pack 410 undergoes thermal runaway, when the pressure received by the first pressure relief diaphragm 720 under the extrusion of the thermal runaway gas meets the preset pressure, the first pressure relief diaphragm 720 will rupture to relieve the pressure of the integrated pipeline 430.

[0081] In the second embodiment, a first pressure relief groove 721 is formed on the surface of the first pressure relief diaphragm 720. Thus, the pressure increment required for the first pressure relief diaphragm 720 to deform from the beginning to complete rupture is reduced, which helps to prevent excessive pressure accumulation in the integrated pipeline 430, thereby protecting the safety of the integrated pipeline 430.

[0082] There are many structural forms of the first pressure relief device. In the second embodiment, the fourth interface portion 740 and the fifth interface portion 750 are respectively provided at both ends of the pressure relief joint body 730, and the fourth interface portion 740 and the fifth interface portion 750 face in opposite directions. In some other embodiments, the structural form of the first pressure relief device can also be other, which is not limited here.

[0083] In the second embodiment, the fluid joint 800 is configured with a second pressure relief device 900. Thus, the fluid joint 800 not only allows the heat exchange liquid to flow through to heat the battery cells, but also protects the battery pack 410 through the second pressure relief device 900 during the heat exchange process to avoid explosion of the battery pack 410 due to thermal runaway.

[0084] In the second embodiment, the fluid joint 800 includes a fluid joint body 810 provided with a third cavity, and a sixth interface portion 820, a seventh interface portion 830 and an eighth interface portion 840 respectively provided on the fluid joint body 810 and communicating with the third cavity. The sixth interface portion 820 is used to connect with the first interface portion 620, and the eighth interface portion 840 is provided with the second pressure relief device 900. Thus, the delivery pipe 310 can be connected to the delivery pipe 310 through the seventh interface portion 830, and the seventh interface portion 830 is used to conduct the ground heat pipe system 300 and the accommodation cavity of the battery module 411. In addition, the fluid joint 800 not only allows the heat exchange liquid to flow through to heat the battery cells, but also protects the battery pack 410 through the second pressure relief device 900 during the heat exchange process to avoid explosion of the battery pack 410 due to thermal runaway.

[0085] In the second embodiment, the second pressure relief device 900 is configured as a pressure relief valve, an explosion-proof valve, an explosion-proof film or a pressure relief breather valve.

[0086] In the second embodiment, the second pressure relief device 900 includes a second cover body 910 threadedly connected to the outer periphery of the eighth interface portion 840, and a second pressure relief diaphragm 920 covering the eighth interface portion 840. The second cover body 910 is provided with a second annular pressing portion 911 opposite to the second pressure relief diaphragm 920, and the second annular pressing portion 911 is used to press the second pressure relief diaphragm 920 against the eighth interface portion 840. Thus, when the battery pack 410 undergoes a thermal runaway, when the pressure received by the first pressure relief diaphragm 720 under the extrusion of the thermal runaway gas meets the preset pressure, the first pressure relief diaphragm 720 will rupture to relieve the pressure of the integrated pipeline 430.

[0087] In the second embodiment, a second pressure relief groove 921 is formed on the surface of the second pressure relief diaphragm 920. Thus, the pressure increment required for the second pressure relief diaphragm 920 to deform from the beginning to completely rupture is reduced, which helps to prevent excessive pressure accumulation in the integrated pipeline 430, thereby protecting the safety of the integrated pipeline 430.

[0088] There are many structural forms of the fluid connector 800. In the second embodiment, the sixth interface portion 820 and the seventh interface portion 830 are respectively provided at both ends of the fluid connector body 810, and the orientations of the sixth interface portion 820 and the seventh interface portion 830 are opposite. The eighth interface portion 840 is provided on the outer peripheral surface of the fluid connector body 810, and the orientation of the eighth interface portion 840 is different from that of the sixth interface portion 820 and the seventh interface portion 830 respectively. In some other embodiments, the structural form of the fluid connector 800 may also be other, which is not limited herein.

[0089] In the second embodiment, the first interface portion 620 is provided with a plug-in conduction structure, and either the fluid connector 800 or the first pressure relief device is plugged into the plug-in conduction structure. Thus, both the fluid connector 800 and the first pressure relief device can be plugged into the first interface portion 620, and after being plugged in, they are in communication with the first cavity. Thus, it is convenient for users to use.

[0090] In the second embodiment, the first pressure relief device is configured as a pressure relief valve, an explosion-proof valve, an explosion-proof film or a pressure relief breather valve.

[0091] The present utility model further provides a battery system 400, which includes a battery pack 410, an integrated pipeline 430, and the aforementioned pressure relief assembly 500. The specific structure of the pressure relief assembly 500 refers to the above embodiments. Since this battery system 400 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one. Among them, the battery pack 410 includes battery modules 411. The battery modules 411 include a housing provided with a receiving cavity and battery cells disposed in the receiving cavity. The integrated pipeline 430 is communicated with the receiving cavity, and the third interface portion 640 of the pressure relief assembly 500 is connected to the integrated pipeline 430. The integrated pipeline 430 is communicated with the delivery pipe 310 of the ground thermal management system 300 through the pressure relief assembly 500. The ground thermal management system 300 can deliver heat exchange liquid to the receiving cavity through the delivery pipe 310 to enable the battery cells to meet the preset temperature, or can also deliver non-combustible gas into the receiving cavity to reduce the probability of thermal runaway of the battery pack 410. The pressure relief assembly 500 not only plays a role in drainage, but also can play a role in pressure relief protection when the pressure in the integrated pipeline 430 exceeds the preset value, effectively improving safety.

[0092] The present utility model further provides an aircraft 100, which includes an aircraft main body 200 and the aforementioned battery pack 410. The specific structure of the battery pack 410 refers to the above embodiments. Since this aircraft 100 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one. Among them, the battery pack 410 is disposed on the aircraft main body 200. It is worth mentioning that the aircraft 100 can be but is not limited to configured as an eVTOL.

[0093] In the first embodiment, an inlet / outlet 250 for the delivery pipe 310 to enter and exit is provided on the outer surface of the aircraft main body 200, so that the delivery pipe 310 can be disassembled and assembled with the fluid connector 800. In this way, the staff can disassemble and assemble the delivery pipe 310 with the fluid connector 800 by making the delivery pipe 310 enter and exit the inlet / outlet 250 without entering the interior of the aircraft 100, and this process is relatively convenient. Further, in the first embodiment, the inlet / outlet 250 is provided on the lower surface of the aircraft main body 200, which makes the height of the inlet / outlet 250 relatively low, so as to facilitate the disassembly and assembly of the delivery pipe 310 with the fluid connector 800.

[0094] In the first embodiment, the battery pack 410 is disposed within the aircraft body 200. A pressure relief port 240 is provided on the outer surface of the aircraft body 200, and the first pressure relief device is disposed at the pressure relief port 240. Thus, once the battery pack 410 undergoes thermal runaway, the hot gas generated by thermal runaway can be discharged out of the aircraft body 200 through the first pressure relief device from the pressure relief port 240, preventing the pilot or passengers from inhaling excessive hot gas generated by thermal runaway. In some other embodiments, the aircraft body 200 may not be provided with a pressure relief port 240, as long as the aircraft 100 is provided with a container to collect the hot gas released by the pressure relief device.

[0095] In the first embodiment, the connection between the first pressure relief device and the pressure relief port 240 is smoothly transitioned with the outer surface of the aircraft body 200. Thus, the influence of the first pressure relief device on the aerodynamics of the aircraft 100 can be reduced, enabling the aircraft 100 to fly efficiently.

[0096] In the first embodiment, the first pressure relief device is flexibly connected to the pressure relief port 240. Thus, the position and orientation of the first pressure relief device relative to the pressure relief port 240 are adjustable, making the installation position of the battery system 400 on the aircraft 100 more flexible. In addition, it is also beneficial to achieve a smooth transition between the connection of the first pressure relief device and the pressure relief port 240 and the outer surface of the aircraft body 200. In some other embodiments, the integrated pipeline 430 is flexible.

[0097] In the first embodiment, the first pressure relief device is connected to the pressure relief port 240 through an elastic structure. In some other embodiments, the pressure relief device can also be flexibly connected to the pressure relief port 240 through other structures, which are not limited herein.

[0098] In the first embodiment, the elastic structure is configured as a rubber joint. In some other embodiments, the elastic structure can also be other structures, which are not limited herein, as long as the elastic structure has elasticity.

[0099] In the first embodiment, a sealing structure is provided between the first pressure relief device and the pressure relief port 240. Thus, the hot gas released outside the aircraft body 200 can be prevented from flowing back into the aircraft body 200 through the gap between the first pressure relief device and the pressure relief port 240.

[0100] In the first embodiment, the sealing structure is configured as a sealant structure, a fireproof sealant structure, or a fireproof filler structure. It is worth mentioning that the fireproof sealant and the fireproof filler can prevent the hot gas at a relatively high temperature from burning the sealing structure, enabling the sealing structure to maintain its sealing performance well.

[0101] In the first embodiment, the aircraft body 200 includes a fuselage 210, a wing 220 provided on the fuselage 210, and an arm 230 provided on the wing 220. The battery pack 410 is disposed within the wing 220 and / or the arm 230. In this way, the space of the wing 220 and / or the arm 230 is fully utilized. In some other embodiments, the battery pack 410 is disposed within the fuselage 210.

[0102] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A pressure relief assembly, characterized in that: include: A seat body, comprising a seat body provided with a first cavity, and a first interface portion, a second interface portion and a third interface portion, all of which are provided on the seat body and are respectively connected to the first cavity; A fluid connector, used to be arranged at the first interface portion, the fluid connector is provided with a valve core so that the fluid connector has a first conducting state and a first closing state; and The first pressure relief device is used to be arranged on the second interface part.

2. The pressure relief assembly according to claim 1, characterized in that: The first interface portion and the second interface portion are different interface portions.

3. The pressure relief assembly according to claim 2, characterized in that: The second interface portion is arranged on the outside of the seat body, and the first pressure relief device includes a first cover body threadedly connected to the outer periphery of the second interface portion, and a first pressure relief diaphragm covering the second interface portion, and the first cover body is provided with a first annular pressing portion opposite to the first pressure relief diaphragm, and the first annular pressing portion is used to press the first pressure relief diaphragm against the second interface portion.

4. The pressure relief assembly according to claim 3, characterized in that: A first pressure relief groove is formed on the surface of the first pressure relief diaphragm.

5. The pressure relief assembly according to claim 2, characterized in that: The first interface portion and the second interface portion are arranged in parallel on the same side of the seat body, and the first interface portion and the second interface portion are oriented in the same direction.

6. The pressure relief assembly according to claim 2, characterized in that: The third interface portion is provided with a threaded connection structure; and / or, the fluid connector is connected to the first interface portion via threads; And / or, the fluid connector is provided with a plug-in conducting structure.

7. The pressure relief assembly according to claim 1, characterized in that: The first interface portion and the second interface portion are the same interface portion, and either the fluid connector or the first pressure relief device is installed on the first interface portion.

8. The pressure relief assembly according to claim 7, characterized in that: The first pressure relief device includes a pressure relief joint body provided with a second cavity, a fourth interface portion and a fifth interface portion respectively provided on the pressure relief joint body and connected with the second cavity, the fourth interface portion being used to connect with the second interface portion, the first pressure relief device also includes a first cover body threadedly connected with the fifth interface portion, and a first pressure relief diaphragm covering the fifth interface portion, the first cover body is provided with a first annular pressing portion opposite to the first pressure relief diaphragm, the first annular pressing portion being used to press the first pressure relief diaphragm against the fifth interface portion.

9. The pressure relief assembly according to claim 8, characterized in that: A first pressure relief groove is formed on the surface of the first pressure relief diaphragm.

10. The pressure relief assembly according to claim 8, characterized in that: The fourth interface portion and the fifth interface portion are respectively arranged at two ends of the pressure relief joint body, and the fourth interface portion and the fifth interface portion are in opposite directions.

11. The pressure relief assembly according to claim 7, characterized in that: The fluid connector includes a fluid connector body provided with a third cavity, and a sixth interface portion, a seventh interface portion and an eighth interface portion respectively provided on the fluid connector body and connected to the third cavity, the sixth interface portion is used to connect with the first interface portion, and the eighth interface portion is provided with a second pressure relief device.

12. The pressure relief assembly according to claim 11, characterized in that: The second pressure relief device is configured as a pressure relief valve, an explosion-proof valve, an explosion-proof membrane or a pressure relief breathing valve.

13. The pressure relief assembly according to claim 11, characterized in that: The second pressure relief device includes a second cover body threadedly connected to the outer periphery of the eighth interface portion, and a second pressure relief diaphragm covering the eighth interface portion, the second cover body is provided with a second annular pressing portion opposite to the second pressure relief diaphragm, and the second annular pressing portion is used to press the second pressure relief diaphragm against the eighth interface portion.

14. The pressure relief assembly according to claim 13, characterized in that: A second pressure relief groove is formed on the surface of the second pressure relief diaphragm.

15. The pressure relief assembly according to claim 11, characterized in that: The sixth interface portion and the seventh interface portion are respectively arranged at two ends of the fluid connector body, and the sixth interface portion and the seventh interface portion are oriented in opposite directions. The eighth interface portion is arranged on the outer peripheral surface of the fluid connector body, and the eighth interface portion is oriented differently from the sixth interface portion and the seventh interface portion.

16. The pressure relief assembly according to claim 7, characterized in that: The first interface portion is provided with a plug-in conductive structure, and one of the fluid connector and the first pressure relief device is plugged into the plug-in conductive structure.

17. The pressure relief assembly according to any one of claims 1 to 16, characterized in that: The first pressure relief device is configured as a pressure relief valve, an explosion-proof valve, an explosion-proof membrane or a pressure relief breathing valve.

18. A battery system, characterized in that: include: A battery pack, comprising a battery module, wherein the battery module comprises a shell having a receiving cavity and a battery cell arranged in the receiving cavity; as well as An integrated pipeline, connected to the receiving cavity; The pressure relief assembly according to any one of claims 1 to 17, wherein the third interface portion is connected to the integrated pipeline.

19. An aircraft, characterized in that: include: Aircraft body: and The battery system as claimed in claim 18 is provided in the aircraft body.

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