Battery apparatus, energy storage apparatus and electrical apparatus

Abstract

Provided in the embodiments of the present disclosure are a battery apparatus, an energy storage apparatus and an electrical apparatus. The battery apparatus comprises a box body and a pressure relief mechanism. The box body comprises a vent hole, the vent hole being led to the outside of the box body. The pressure relief mechanism comprises a sealing portion; the sealing portion is located outside the box body; the sealing portion covers the box body in a first direction; the sealing portion comprises a reinforcement portion and an elastic deformation portion, and both the reinforcement portion and the elastic deformation portion can be sealingly attached to the box body, so as to jointly enclose a buffer space isolated from the outside of the battery apparatus; the vent hole is communicated with the buffer space; and the stiffness of the reinforcement portion is greater than the stiffness of the elastic deformation portion, so that the pressure of ejecta vented from a vent port for driving the separation of the reinforcement portion from the box body is greater than the pressure of same for driving the separation of the elastic deformation portion from the box body. The battery apparatus in the embodiments of the present disclosure is provided with the reinforcement portion and the elastic deformation portion having different stiffnesses, such that the purpose of adjusting the vent direction of ejecta can be achieved, thereby reducing the risk of damage to surrounding people or objects caused by ejecta.

Description

A battery device, an energy storage device, and an electrical device. Technical Field

[0001] This disclosure relates to the field of battery technology, specifically to a battery device, an energy storage device, and an electrical device. Background Technology

[0002] The battery device is equipped with a pressure relief mechanism, which can discharge the high-temperature and high-pressure emissions generated by thermal runaway of individual battery cells in the battery device, thereby reducing the risk of further deterioration of thermal runaway or explosion in the battery device.

[0003] The high-temperature, high-pressure emissions from the pressure relief mechanism may impact other objects around the battery device, potentially causing further hazards. Summary of the Invention

[0004] In view of this, the present disclosure aims to provide a battery device, energy storage device, and power consumption device that facilitates control of the flow direction of high-temperature and high-pressure emissions discharged by the pressure relief mechanism.

[0005] To achieve the above objectives, the technical solution of this disclosure embodiment is implemented as follows:

[0006] This disclosure provides a battery device, the battery device comprising:

[0007] The housing includes a discharge port that communicates with the outside of the housing;

[0008] The pressure relief mechanism includes a sealing part located outside the housing and covering the housing along a first direction. The sealing part includes a reinforcing part and an elastically deformable part, both of which can be sealed and fitted to the housing to jointly enclose a buffer space isolated from the outside of the battery device. The discharge port communicates with the buffer space. The stiffness of the reinforcing part is greater than that of the elastically deformable part, so that the pressure at which the discharge from the discharge port drives the reinforcing part to separate from the housing is greater than the pressure at which the elastically deformable part separates from the housing.

[0009] The battery device in this embodiment of the present disclosure, by setting up reinforcing parts and elastic deformation parts with different stiffnesses, enables the emissions to preferentially break apart between the elastic deformation parts and the housing and be discharged from the gap between them after thermal runaway of the battery cell. Thus, by adjusting the position of the elastic deformation parts, the emission direction of the emissions can be adjusted, reducing the risk of emissions spreading in multiple directions and causing damage to surrounding people or objects.

[0010] In some embodiments, the reinforcing portion includes an elastic sub-part and a reinforcing member. The elastic sub-part is capable of sealing and fitting with the housing, and the reinforcing member is fixed to the elastic sub-part. The elastic modulus of the material of the reinforcing member is greater than that of the material of the elastic sub-part. Thus, on the one hand, the overall stiffness of the reinforcing portion is improved by utilizing the reinforcing member's suppression of deformation of the elastic sub-part; on the other hand, the lower elastic modulus of the elastic sub-part helps to maintain a sealed fit between the reinforcing portion and the housing under normal battery device operation.

[0011] In some embodiments, the elastic sub-part has a mounting groove with one side open, and the reinforcing member is embedded in the mounting groove. Thus, the inner wall of the mounting groove can constrain the position of the reinforcing member, reducing the risk of the reinforcing member failing due to movement relative to the elastic sub-part during use of the battery device; it also facilitates the use of the mounting groove as an indicator during the assembly of the pressure relief mechanism, improving assembly efficiency.

[0012] In some embodiments, the mounting groove is open on both sides along the first direction, and the reinforcing member is sealed to the inner wall of the mounting groove. This helps to reduce the size of the elastic sub-part along the first direction, making the structure of the reinforcing part and the pressure relief mechanism more compact, and improving the adaptability of the pressure relief mechanism.

[0013] In some embodiments, in a projection plane perpendicular to the first direction, the projection of the sealing portion is annular, the projections of the elastic sub-part and the elastic deformation portion are both fan-shaped, and their projections are coaxially arranged with the projection of the sealing portion. The projection of the reinforcing member is located within the projection range of the elastic sub-part. This facilitates maintaining the seal of the buffer space by ensuring that the area around the sealing portion remains in close contact with the casing during normal use of the battery device.

[0014] In some embodiments, in a projection plane perpendicular to the first direction, the projection of the reinforcing member is fan-shaped and coaxially arranged with the projection of the elastic sub-part. At least a portion of the elastic sub-part is located on the side of the reinforcing member radially away from the central axis of the sealing portion, so as to be able to seal and fit with the housing. The fact that at least a portion of the elastic sub-part is located on the side of the reinforcing member radially away from the central axis allows the elastic sub-part to seal and fit with the housing preferentially over the reinforcing member. This ensures that the elastic sub-part and the elastically deformable portion together maintain the fit between the sealing portion and the housing, which is beneficial for improving the sealing performance of the buffer space under normal operating conditions of the battery device.

[0015] In some embodiments, the arc angle of the projection of the reinforcing member in the projection plane perpendicular to the first direction is no greater than 180°. This helps to reduce the inhibitory effect of the reinforcing member on the deformation of the elastic deformation part, and also helps to ensure that the size of the gap generated after the elastic deformation part separates from the housing meets the emission flow requirements of the emissions.

[0016] In some embodiments, the reinforcing member is a strip-shaped structure extending radially along the sealing portion, and there are multiple reinforcing members evenly arranged circumferentially along the sealing portion. This helps to reduce the size of the reinforcing members and makes the pressure relief mechanism more compact; the spacing between the reinforcing members helps to maintain a certain elasticity of the elastic sub-part, so that the elastic sub-part can also be separated from the housing.

[0017] In some embodiments, at least a portion of the projection of the outlet of the discharge hole lies within the projection range of the reinforcing member in a projection plane perpendicular to the first direction. This allows at least a portion of the discharge to directly impact the reinforcing member before dispersing the force to the elastic sub-part, reducing the likelihood of damage to the elastic sub-part due to direct impact from the discharge, and also reducing the probability of premature separation of the elastic sub-part from the housing due to impact.

[0018] In some embodiments, the material of the elastic sub-part is the same as the material of the elastic deformation part. This simplifies the manufacturing process of the sealing part. Furthermore, using the same material helps control the sealing force between the sealing part and the housing, and allows the pressure relief mechanism to open promptly to discharge the waste after it enters the buffer space.

[0019] In some embodiments, the elastic sub-part and the elastic deformation part are an integral structure. This simplifies the manufacturing process of the elastic sub-part and the elastic deformation part, improving production efficiency. Furthermore, it eliminates the seam between the elastic sub-part and the elastic deformation part, reducing the probability of waste directly breaking through the seal and being discharged.

[0020] In some embodiments, the material of the elastic sub-part is one of silicone rubber, fluororubber, and EPDM rubber. This facilitates a tight seal between the elastic sub-part and the housing during normal operation of the battery device. On the one hand, it helps adapt to different working environments faced by the battery device. For example, when the battery device is used on an aircraft, the aircraft faces a rapidly changing temperature environment during takeoff and landing, which helps the elastic sub-part maintain a tight seal with the housing. On the other hand, it also helps reduce the risk that the elastic sub-part may be damaged by the high temperature of the emissions in the event of thermal runaway, causing the emissions to not be discharged in the intended direction.

[0021] And / or, the material of the reinforcing member is one of polypropylene, polyamide, polycarbonate, or metal, so that the reinforcing member has good structural strength, reducing the probability of the elastic part separating from the housing due to deformation of the reinforcing member under the impact of emissions.

[0022] In some embodiments, the elastic modulus of the material of the reinforcing member is greater than that of the material of the elastically deformable portion. This facilitates the elastically deformable portion deforming and separating from the housing before the reinforcing member deforms under the impact of the exhaust.

[0023] In some embodiments, the reinforcing part is made of the same material as the elastically deformable part, and the maximum dimension of the reinforcing part along the first direction is greater than the maximum dimension of the elastically deformable part along the first direction. Thus, using the same material for both simplifies the manufacturing process of the sealing part and improves production efficiency; the different dimensions along the first direction also facilitate visual identification of the reinforcing part and the elastically deformable part during the installation of the pressure relief mechanism, and ensures that the reinforcing part and the elastically deformable part are accurately installed in the preset positions.

[0024] In some embodiments, the reinforcing portion includes a rib portion and a main body portion. In a projection plane perpendicular to the first direction, the projection of the sealing portion is annular, while the projections of the main body portion and the elastically deformable portion are both fan-shaped and coaxially arranged with the projection of the sealing portion. The rib portion is located on at least one side of the main body portion along the first direction and protrudes from the main body portion along the first direction on at least one side. The rib portion extends radially along the sealing portion. This facilitates maintaining the periphery of the sealing portion in close contact with the casing when the battery device is in normal use, helps maintain the sealing of the buffer space, and increases the size of a portion of the reinforcing portion along the first direction, thereby helping to suppress deformation of the reinforcing portion in the first direction.

[0025] In some embodiments, there are multiple ribs, which are arranged at circumferential intervals along the sealing portion. This is advantageous in reducing the size of individual ribs, thereby reducing the overall outer contour size of the sealing portion and improving the installation adaptability of the pressure relief mechanism.

[0026] In some embodiments, at least a portion of the rib portion is located on the side of the main body portion closer to the housing along the first direction. This helps to reduce the size of the rib portion and also helps to reduce the overall outer contour size of the sealing portion; it also prevents the rib portion from being exposed to the outside, reducing the risk of the battery device failing due to external impacts during use.

[0027] In some embodiments, the reinforcing portion and the elastically deformable portion are an integral structure. This improves the manufacturing efficiency of the sealing portion and reduces the risk of damage to the sealing portion caused by the impact of emissions on the junction of the three components.

[0028] In some embodiments, the projection of the area where the sealing part and the housing fit together in a projection plane perpendicular to the first direction is annular. This facilitates a more uniform distribution of the force applied to the sealing part after the exhaust enters the buffer space, reducing the probability that the portion of the sealing part that fits with the housing, excluding the elastic deformation part, will prematurely separate from the housing due to the concentrated impact force of the exhaust; it also helps to ensure that the elastic deformation part is subjected to uniform force, reducing the risk of damage due to concentrated force.

[0029] In some embodiments, the material of the elastic deformation part is one of silicone rubber, fluororubber, and EPDM rubber. This facilitates the elastic deformation part maintaining a sealed fit with the housing during normal battery operation. On one hand, it helps adapt to different operating environments faced by the battery device. For example, in the case of a battery device used in an aircraft, the aircraft faces a rapidly changing temperature environment during takeoff and landing. This allows the elastic deformation part to maintain a sealed fit with the housing and to separate from the housing in the event of thermal runaway. On the other hand, it also reduces the risk that, in the event of thermal runaway, the elastic deformation part may be damaged by the high temperature of the emissions, causing the emissions to not be discharged in the intended direction.

[0030] In some embodiments, the pressure relief mechanism includes a fixing portion extending along the first direction, and a sealing portion circumferentially disposed on the edge of the fixing portion perpendicular to the first direction. The end of the sealing portion perpendicular to the first direction away from the fixing portion is closer to the first end of the fixing portion than the end closer to the fixing portion along the first direction, and the first end can be fixed to the housing. This facilitates deformation of the end of the sealing portion away from the fixing portion due to the pre-tightening force of the housing during the installation of the fixing portion and the housing along the first direction. By applying a pre-tightening force to the sealing portion, the sealing portion remains in contact with the housing during normal use of the battery device, reducing the probability of separation between the sealing portion and the housing due to collisions or other factors during normal use of the battery device, and thus helping to maintain the sealing of the buffer space.

[0031] In some embodiments, the housing includes a mounting hole on its outer surface. A portion of the fixing part perpendicular to the first direction is recessed to form a positioning groove. A portion of the fixing part can be inserted into the mounting hole, allowing a part of the housing to be embedded in the positioning groove and engage with the groove wall along the first direction. Thus, the limiting effect between the groove wall and the housing along the first direction ensures the pressure relief mechanism remains fixed to the housing along the first direction, effectively suppressing displacement of the fixing part along the first direction when the discharged material impacts the sealing part. The fixing method between the fixing part and the housing is simple and facilitates the installation of the pressure relief mechanism.

[0032] In some embodiments, the inner wall of the mounting hole and the fixing part are anti-rotationally fitted. This helps reduce the probability that the orientation of the elastic deformation part will change due to the pressure relief mechanism rotating relative to the housing when it comes into contact with external objects during normal use of the battery device. It also helps ensure that the emission direction of the emitted materials is directed in a predetermined direction after the battery device experiences thermal runaway.

[0033] In some embodiments, there are multiple discharge holes, which are arranged around the periphery of the mounting hole. This facilitates ensuring that the flow rate of emissions entering the buffer space meets requirements, and allows the elastically deformable portion of the battery device to promptly separate from the housing to discharge emissions after thermal runaway.

[0034] This disclosure also provides an energy storage device, including a battery device according to any of the foregoing embodiments. This is advantageous in reducing the probability of emissions from the battery device causing damage to other components in the storage device in the event of thermal runaway.

[0035] This disclosure also provides an electrical device including a battery device according to any one of the foregoing embodiments or an energy storage device as described in the foregoing embodiments. This is advantageous in reducing the probability of emissions from the battery device causing damage to other components in the electrical device in the event of thermal runaway of the battery device.

[0036] In some embodiments, the electrical device includes an aircraft. This facilitates the aircraft maintaining normal operation even in the event of thermal runaway of the battery. Attached Figure Description

[0037] Figure 1 is a schematic diagram of an embodiment of the present disclosure in which the electrical device is a vehicle;

[0038] Figure 2 is a schematic diagram of a battery in one embodiment of this disclosure;

[0039] Figure 3 is a schematic diagram of part of the box and pressure relief mechanism in the first embodiment of this disclosure;

[0040] Figure 4 is a cross-sectional view of position AA in Figure 3;

[0041] Figure 5 is a schematic diagram of the separation of the elastically deformable part from the box body in the embodiment of Figure 4, wherein the dashed arrows indicate the flow path of some of the emissions;

[0042] Figure 6 is a cross-sectional schematic diagram of part of the box and the pressure relief mechanism in the second embodiment of this disclosure, and the cross-sectional position is the same as position AA in Figure 3;

[0043] Figure 7 is a schematic diagram of the pressure relief mechanism in Figure 6;

[0044] Figure 8 is a cross-sectional schematic diagram of part of the box and the pressure relief mechanism in the third embodiment of this disclosure;

[0045] Figure 9 is a cross-sectional schematic diagram of part of the box and the pressure relief mechanism in the fourth embodiment of this disclosure, and the cross-sectional position is the same as position AA in Figure 3;

[0046] Figure 10 is a schematic diagram of the pressure relief mechanism in the fifth embodiment of this disclosure;

[0047] Figure 11 is a schematic diagram of the embodiment in Figure 10 from another perspective. Detailed Implementation

[0048] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this disclosure can be combined with each other. The detailed description in the specific implementation should be understood as an explanation of the purpose of the embodiments of this disclosure and should not be regarded as an improper limitation on the embodiments of this disclosure.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0053] In the description of the embodiments disclosed herein, for ease of explanation, as shown in the accompanying drawings, the direction in which the arrow X is located is referred to as the "first direction".

[0054] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0055] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0056] In this embodiment of the disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0057] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments disclosed herein are not limited to this.

[0058] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0059] The battery device mentioned in the embodiments of this disclosure may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0060] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0061] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0062] In some embodiments, referring to FIG2, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies, the battery cell assemblies being housed in the housing.

[0063] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0064] As an example, the battery cell assembly can also be housed in the housing by directly fixing multiple battery cells 30 to the housing.

[0065] As an example, referring to Figure 2, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0066] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0067] In some embodiments, the housing 10 may be part of the vehicle's chassis structure. For example, a portion of the housing 10 may be at least a portion of the vehicle's floor, or a portion of the housing 10 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0068] This disclosure provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0069] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this disclosure can be any power system that requires energy storage devices.

[0070] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0071] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0072] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0073] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0074] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0075] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as the Insulation Monitoring Module (IMM), the Master Battery Management Unit (MBMU), the Ethernet (ETH) module, and the fiber optic conversion module.

[0076] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0077] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0078] The technical solutions described in the embodiments of this disclosure are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0079] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this disclosure. The description is as follows, in conjunction with the accompanying drawings.

[0080] Figure 1 is a structural schematic diagram of a vehicle 1000 provided in an embodiment of this disclosure. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. As shown in Figure 1, a battery device 100 is provided inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0081] In some embodiments of this disclosure, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0082] The embodiments of this disclosure will now be described in detail.

[0083] In related technologies, the battery pack is equipped with a pressure relief mechanism. After a single battery cell in the battery pack experiences thermal runaway, the resulting high-temperature and high-pressure material can open the pressure relief mechanism, allowing the high-temperature and high-pressure material to be discharged to the outside of the battery pack as a discharge, thereby reducing the probability of further deterioration of thermal runaway or explosion in the battery pack.

[0084] Understandably, the emissions, after being discharged from the pressure relief mechanism, are at high pressure and temperature, which may impact people or objects around the battery device, causing further damage, or may ignite surrounding objects, thus expanding the hazard.

[0085] Based on the above problems, the present disclosure aims to provide a battery device in which the pressure relief mechanism has a reinforcing part and an elastic deformation part with different stiffnesses. Under the impact of the discharge, the elastic deformation part can deform before the reinforcing part, so that the discharge is preferentially discharged from the gap between the elastic deformation part and the housing, thereby achieving the purpose of constraining the discharge direction of the discharge.

[0086] Specifically, referring to Figures 2 to 4, the battery device 100 in this embodiment of the present disclosure includes a housing 10 and a pressure relief mechanism 20.

[0087] The housing 10 includes a discharge port 10b, which communicates with the outside of the housing 10.

[0088] The pressure relief mechanism 20 includes a sealing part 21 located outside the housing 10. The sealing part 21 covers the housing 10 along a first direction. The sealing part 21 includes a reinforcing part 211 and an elastic deformation part 212. Both the reinforcing part 211 and the elastic deformation part 212 can be sealed and fitted to the housing 10 to jointly enclose a buffer space 20a that is isolated from the outside of the battery device 100. The discharge hole 10b communicates with the buffer space 20a. The stiffness of the reinforcing part 211 is greater than the stiffness of the elastic deformation part 212, so that the pressure of the discharge from the discharge hole that drives the reinforcing part 211 to separate from the housing 10 is greater than the pressure that drives the elastic deformation part 212 to separate from the housing 10.

[0089] The housing 10 has an installation space 10a for arranging battery cells 30. The discharge hole 10b is connected to the installation space 10a so that after the battery cells 30 in the installation space 10a undergo thermal runaway, the emissions can be discharged through the discharge hole 10b.

[0090] At least a portion of the sealing part 21 covers the outer surface of the housing 10.

[0091] Stiffness is the ability of a material or structure to resist elastic deformation when subjected to stress; it is a characterization of how easily a material or structure can undergo elastic deformation.

[0092] The stiffness of the reinforcing part 211 is greater than that of the elastic deformation part 212, meaning that the force required to drive the reinforcing part 211 to deform is greater than the force required to drive the elastic deformation part 212 to deform.

[0093] After the discharge material is discharged through the discharge hole 10b, it enters the buffer space 20a, thereby increasing the pressure in the buffer space 20a and applying force to the reinforcing part 211 and the elastic deformation part 212 respectively.

[0094] It is understandable that, since the buffer space 20a is formed by the reinforcing part 211 and the elastic deformation part 212, the pressure generated by the force exerted by the discharge on the reinforcing part 211 is the same as the pressure generated by the force exerted by the discharge on the elastic deformation part 212.

[0095] Referring to Figure 5, as the emissions continuously enter the buffer space 20a, the pressure within the buffer space 20a continuously increases. Since the stiffness of the reinforcing part 211 is greater than the stiffness of the elastically deformable part 212, the pressure value within the buffer space 20a is sufficient to first satisfy the pressure value required to drive the elastically deformable part 212 to separate from the housing 10. This causes a gap to form between the elastically deformable part 212 and the housing 10, while the reinforcing part 211 remains sealed to the housing 10. The emissions within the buffer space 20a can then be discharged outside the battery device 100 through the gap formed between the elastically deformable part 212 and the housing 10.

[0096] The battery device 100 in this embodiment of the present disclosure, by providing a reinforcing part 211 and an elastic deformation part 212 with different stiffnesses, enables the emissions to preferentially push the elastic deformation part 212 and the housing 10 apart and discharge from the gap between them after thermal runaway of the battery cell 30. By adjusting the position of the elastic deformation part 212, the emission direction of the emissions can be adjusted, reducing the risk of the emissions spreading in multiple directions and causing damage to surrounding people or objects.

[0097] The specific structural form of the reinforced section 211 is not limited.

[0098] For example, referring to Figures 3 to 5, the reinforcing part 211 includes an elastic sub-part 2112 and a reinforcing member 2111. The elastic sub-part 2112 can be sealed and fitted with the housing 10. The reinforcing member 2111 is fixed to the elastic sub-part 2112. The elastic modulus of the material of the reinforcing member 2111 is greater than the elastic modulus of the material of the elastic sub-part 2112.

[0099] The elastic modulus refers to the proportionality coefficient between stress and strain in a material during the elastic deformation stage.

[0100] The elastic modulus of the material of the reinforcing member 2111 is greater than that of the material of the elastic sub-part 2112, so that under the action of the same magnitude of force, the deformation generated by the reinforcing member 2111 is less than that generated by the elastic sub-part 2112 in the same direction.

[0101] The reinforcing member 2111 is fixed to the elastic sub-part 2112, thereby suppressing the deformation of the elastic sub-part 2112 under external force.

[0102] Thus, on the one hand, by utilizing the effect of the reinforcing member 2111 in suppressing the deformation of the elastic sub-part 2112, the overall rigidity of the reinforcing part 211 is improved; on the other hand, by utilizing the advantage of the lower elastic modulus of the elastic sub-part 2112, it is beneficial to ensure that the reinforcing part 211 and the housing 10 remain sealed and fitted under normal operating conditions of the battery device 100.

[0103] Understandably, in the case of severe thermal runaway of the battery cell 30, the elastic sub-part 2112 can separate from the housing 10 later than the elastic deformation part 212 to create a gap, which helps to increase the flow rate of discharged waste and reduce the risk of further damage to the battery device 100.

[0104] The specific method of fixing the reinforcing member 2111 to the elastic sub-part 2112 is not limited.

[0105] In some embodiments, the reinforcing member 2111 is bonded to the elastic sub-part 2112, which is a simple connection method and helps to simplify the structure of the reinforcing member 2111 and the elastic sub-part 2112.

[0106] In some embodiments, referring to Figures 4 to 6, the elastic sub-part 2112 is provided with a mounting groove 2112a, one side of which is open, and the reinforcing member 2111 is embedded in the mounting groove 2112a.

[0107] In this way, the inner wall of the mounting groove 2112a can constrain the position of the reinforcing member 2111, reducing the risk of the reinforcing member 2111 moving relative to the elastic sub-part 2112 during the use of the battery device 100 and causing the reinforcing part 211 to fail; it also helps to play an indicative role in the assembly of the pressure relief mechanism 20 through the mounting groove 2112a, thereby improving assembly efficiency.

[0108] In some embodiments, the side of the mounting groove 2112a facing away from the buffer space 20a is open, that is, the open position of the mounting groove 2112a is directly exposed to the outside of the battery device 100 so as to observe whether the reinforcing member 2111 and the elastic sub-part 2112 have fallen off during maintenance.

[0109] In some embodiments, the mounting groove 2112a is open to the side facing the buffer space 20a, which helps to reduce the probability that the reinforcing member 2111 will separate from the elastic sub-part 2112 due to collisions with external objects during normal use of the battery device 100.

[0110] In some embodiments, referring to Figures 6 and 7, the mounting groove 2112a is open on both sides along the first direction, and the reinforcing member 2111 is sealed and fitted to the inner wall of the mounting groove 2112a.

[0111] This helps to reduce the size of the elastic sub-part 2112 along the first direction, making the structure of the reinforcing part 211 and the pressure relief mechanism 20 more compact, and improving the adaptability of the pressure relief mechanism 20.

[0112] In some embodiments where the mounting groove 2112a is open on both sides along the first direction, referring to Figures 4 to 6, the reinforcing member 2111 does not extend beyond the elastic sub-part 2112 along the first direction. This helps to reduce the probability that the reinforcing member 2111 will shift relative to the elastic sub-part 2112 due to friction with external objects or the housing 10.

[0113] In some embodiments, referring to FIG3, the projection of the sealing portion 21 in the projection plane perpendicular to the first direction is an annular shape.

[0114] This helps to ensure that the reinforcing part 211 and the elastic deformation part 212 are subjected to uniform force under the impact of the exhaust, reducing the probability that the reinforcing part 211 will separate from the housing 10 before the elastic deformation part 212 due to the concentration of force.

[0115] In some embodiments, referring to FIG3, in the projection plane perpendicular to the first direction, the projection of the elastic sub-part 2112 and the projection of the elastic deformation part 212 are both fan-shaped and their projections are arranged coaxially with the projection of the sealing part 21, and the projection of the reinforcing member 2111 is located within the projection range of the elastic sub-part 2112.

[0116] This helps to keep the area around the sealing part 21 in close contact with the housing 10 when the battery device 100 is in normal use, which helps to maintain the sealing of the buffer space 20a.

[0117] In some embodiments, referring to FIG3, in a projection plane perpendicular to the first direction, the projection of the reinforcing member 2111 is fan-shaped and coaxially arranged with the projection of the elastic sub-part 2112. At least a portion of the elastic sub-part 2112 is located on the side of the reinforcing member 2111 that is radially away from the central axis of the sealing part 21, so as to be able to seal and fit with the housing 10.

[0118] The reinforcement 2111 is fan-shaped, which helps to make the constraint applied by the reinforcement 2111 to the elastic sub-part 2112 more uniform and reduces the probability that part of the elastic sub-part 2112 separates from the housing 10 before the elastic deformation part 212.

[0119] At least a portion of the elastic sub-part 2112 is located on the side of the reinforcing member 2111 that is radially away from the central axis, so that the elastic sub-part 2112 is in a sealed fit with the housing 10 prior to the reinforcing member 2111. This allows the elastic sub-part 2112 and the elastic deformation part 212 to jointly maintain the fit between the sealing part 21 and the housing 10, which is beneficial to improving the sealing performance of the buffer space 20a under normal use of the battery device 100.

[0120] When the sealing part 21 is sealed and fitted with the housing 10, the reinforcing member 2111 may be spaced apart from the housing 10, or it may be at least partially fitted with the housing 10.

[0121] In some embodiments, referring to FIG3, the arc angle of the projection of the reinforcing member 2111 in the projection plane perpendicular to the first direction is not greater than 180°. That is, α≤180°.

[0122] This helps to reduce the inhibitory effect of the reinforcing member 2111 on the deformation of the elastic deformation part 212, and also helps to ensure that the size of the gap generated after the elastic deformation part 212 separates from the housing 10 meets the emission flow requirements of the emissions.

[0123] It is understandable that the arc angle of the reinforcing member 2111 is greater than 0°, that is, 0°<α≤180°.

[0124] The specific degree of the arc angle of the projection of the reinforcing member 2111 can be 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 180°, etc.

[0125] In some embodiments, referring to FIG8, the reinforcing member 2111 is a strip-shaped structure extending radially along the sealing portion 21, and there are multiple reinforcing members 2111, which are evenly arranged circumferentially along the sealing portion 21.

[0126] This helps to reduce the size of the reinforcing member 2111, and makes the pressure relief mechanism 20 more compact; the spacing between the reinforcing members 2111 helps to maintain a certain elasticity of the elastic sub-part 2112, so that the elastic sub-part 2112 can also be separated from the housing 10.

[0127] The specific number of the reinforcing members 2111 in the strip structure is not limited, for example, two, three, four, five, etc.

[0128] After the emissions are ejected from the discharge port, at least a portion of the emissions continue to move in the first direction and directly impact the sealing part 21.

[0129] Understandably, the elastic sub-part 2112 is more prone to deformation than the reinforcing part 2111 under the impact of emissions.

[0130] In some embodiments, the size of the reinforcing member 2111 along the radial direction of the sealing portion 21 is not less than half the size of the reinforcing member 211.

[0131] This helps the reinforcing member 2111 to suppress the deformation of the elastic sub-part 2112 under the impact of the exhaust, and helps the elastic sub-part 2112 to stay in close contact with the housing 10.

[0132] In some embodiments, referring to Figures 4 to 6, at least a portion of the projection of the outlet of the discharge hole 10b is located within the projection range of the reinforcement 2111 in a projection plane perpendicular to the first direction.

[0133] After the emissions are ejected from the discharge port, at least a portion of the emissions continue to move in the first direction and directly impact the reinforcing member 2111.

[0134] Understandably, the reinforcing member 2111 is less likely to deform under the impact of the exhaust material compared to the elastic sub-part 2112.

[0135] In this way, at least some of the emissions directly impact the reinforcing member 2111 before dispersing the force to the elastic sub-part 2112. This helps reduce the probability of the elastic sub-part 2112 being damaged by the direct impact of the emissions, and also helps reduce the probability of the elastic sub-part 2112 separating from the housing 10 prematurely due to the impact.

[0136] In some embodiments, referring to Figures 4 to 6, in a projection plane perpendicular to the first direction, at least a portion of the projection of the outlet of the discharge hole 10b is located outside the projection range of the elastic sub-section 2112.

[0137] This helps to further reduce the probability that emissions ejected from the discharge port will directly impact the elastic sub-section 2112.

[0138] In some embodiments, the material of the elastic sub-part 2112 is the same as the material of the elastic deformation part 212.

[0139] This simplifies the manufacturing process of the sealing part 21. At the same time, using the same material helps control the sealing force between the sealing part 21 and the housing 10, and allows the pressure relief mechanism 20 to open in time to discharge the discharge after the discharge enters the buffer space 20a.

[0140] In some embodiments, the elastic sub-part 2112 and the elastic deformation part 212 are two independent components that are sealed together to reduce the probability of emissions leaking directly from the contact point between them.

[0141] The specific method by which the elastic sub-part 2112 and the elastic deformation part 212 achieve a sealed connection is not limited; for example, the two are bonded together by sealant.

[0142] In some embodiments, the elastic sub-part 2112 and the elastic deformation part 212 are integral structures. That is, the elastic sub-part 2112 and the elastic deformation part 212 can be manufactured simultaneously, and the elastic sub-part 2112 and the elastic deformation part 212 are different parts of the same component.

[0143] In this way, on the one hand, it is beneficial to simplify the manufacturing process of the elastic sub-part 2112 and the elastic deformation part 212 and improve production efficiency; on the other hand, it eliminates the seam between the elastic sub-part 2112 and the elastic deformation part 212, reducing the probability that the discharge material will directly break through the sealing part 21 and be discharged.

[0144] The specific process for realizing the elastic sub-part 2112 and the elastic deformation part 212 as an integral structure is not limited, such as injection molding, compression molding, extrusion molding, additive manufacturing and other processes.

[0145] In some embodiments, the material of the elastic sub-part 2112 is one of silicone rubber, fluororubber, and EPDM rubber.

[0146] Silicone rubber is a type of rubber whose main chain consists of alternating silicon and oxygen atoms, with two organic groups typically attached to each silicon atom. Silicone rubber exhibits good low-temperature and heat resistance.

[0147] Fluororubber is a synthetic rubber in which fluorine atoms are present on the carbon atoms of the main chain or side chains. Fluororubber has good heat resistance, oxidation resistance, oil resistance, and corrosion resistance.

[0148] Ethylene propylene diene monomer (EPDM) rubber refers to a terpolymer of ethylene, propylene, and a non-conjugated diene. EPDM rubber exhibits good aging resistance, corrosion resistance, and heat resistance.

[0149] This design facilitates the sealing and fit of the elastic sub-part 2112 with the housing 10 during normal operation of the battery device 100. On the one hand, it helps adapt to different working environments faced by the battery device 100. For example, when the battery device 100 is used on an aircraft, the aircraft faces a rapidly changing temperature environment during takeoff and landing, which helps the elastic sub-part 2112 maintain a sealed fit with the housing 10. On the other hand, it also helps reduce the risk that the elastic sub-part 2112 may be damaged by the high temperature of the emissions in the event of thermal runaway, resulting in the emissions not being discharged in the intended direction.

[0150] In some embodiments, the material of the reinforcing member 2111 is one of polypropylene, polyamide, polycarbonate, or metal.

[0151] Polypropylene (PP) is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and good corrosion resistance.

[0152] Polyamide (PA), commonly known as nylon, has good wear resistance and fatigue resistance.

[0153] Polycarbonate (PC) is a high molecular weight polymer containing carbonate groups in its molecular chain. It has good heat resistance and flame retardancy.

[0154] Metals possess high structural strength. The specific type of metal is not limited; examples include stainless steel.

[0155] Thus, by giving the reinforcing member 2111 good structural strength, the probability of the reinforcing member 2111 deforming under the impact of the exhaust material and causing the elastic sub-part 2112 to separate from the housing 10 is reduced.

[0156] In some embodiments, the elastic modulus of the material of the reinforcing member 2111 is greater than that of the material of the elastically deformable part 212.

[0157] This allows the elastic deformation part 212 to deform before the reinforcing part 211 and separate from the housing 10 under the impact of the emissions.

[0158] It is understandable that the difference in stiffness between the elastic deformation part 212 and the reinforcing part 211 may be caused by different materials, or by differences in size, or by a combination of factors such as material, size and shape.

[0159] In some embodiments, referring to FIG9, the material of the reinforcing part 211 is the same as that of the elastically deformable part 212, and the maximum dimension of the reinforcing part 211 along the first direction is greater than the maximum dimension of the elastically deformable part 212 along the first direction. That is, L1 > L2.

[0160] Both are made of the same material, meaning that the material of the reinforcing part 211 and the material of the elastic deformation part 212 have the same mechanical properties. Therefore, the two have different dimensions along the first direction, which results in the same amount of strain being generated along the first direction, but the pressure required within the buffer space 20a is different.

[0161] Thus, using the same material for both parts simplifies the manufacturing process of the sealing part 21 and improves production efficiency. The different dimensions of the two parts along the first direction also make it easier to visually distinguish the reinforcing part 211 and the elastic deformation part 212 during the installation of the pressure relief mechanism 20, and make it easier for the reinforcing part 211 and the elastic deformation part 212 to be accurately installed in the preset position.

[0162] In some embodiments, referring to Figures 9 to 11, the reinforcing part 211 includes a rib part 2113 and a main body part 2114. In a projection plane perpendicular to the first direction, the projection of the sealing part 21 is annular, the projection of the main body part 2114 and the projection of the elastic deformation part 212 are both fan-shaped and their projections are arranged coaxially with the projection of the sealing part 21. The rib part 2113 is provided on at least one side of the main body part 2114 along the first direction and at least partly protrudes from the main body part 2114 along the first direction. The rib part 2113 extends radially along the sealing part 21.

[0163] The material of the reinforcing rib 2113 is the same as that of the main body 2114.

[0164] The rib section 2113 extends in the radial direction, which helps to suppress the bending deformation of the main body section 2114 in the direction away from the box body 10 along the first direction.

[0165] This is beneficial for maintaining the area around the sealing part 21 to fit the housing 10 when the battery device 100 is in normal use, and for maintaining the sealing of the buffer space 20a. The rib part 2113 increases the size of a portion of the reinforcing part 211 along the first direction, thereby helping to suppress the deformation of the reinforcing part 211 in the first direction.

[0166] In some embodiments, the main body 2114 and the elastic deformation part 212 are at the same distance from the central axis of the sealing part 21, and have the same dimensions along the first direction. This helps to simplify the manufacturing process of the main body 2114 and the elastic deformation part 212 and improve production efficiency.

[0167] In some embodiments, in a projection plane perpendicular to the first direction, the circumferential boundary of the projection of the main body 2114 coincides with the circumferential boundary of the elastically deformable part 212.

[0168] In some embodiments, referring to Figures 10 and 11, there are multiple rib portions 2113, which are arranged at intervals along the circumference of the sealing portion 21.

[0169] This reduces the size of individual rib sections 2113, thereby reducing the overall outer contour size of the sealing section 21 and improving the installation adaptability of the pressure relief mechanism 20.

[0170] The specific number of reinforcing strips 2113 is unlimited, such as two, three, four, five, six, etc.

[0171] In some embodiments where the number of rib portions 2113 is multiple, in a projection plane perpendicular to the first direction, along the circumference of the sealing portion 21, the included angle between the outermost boundaries of the two outermost rib portions 2113 is no greater than 180°.

[0172] This helps to reduce the inhibitory effect of the rib section 2113 on the deformation of the elastic deformation section 212, and also helps to ensure that the size of the gap generated after the elastic deformation section 212 separates from the housing 10 meets the emission flow requirements of the emissions.

[0173] In some embodiments, referring to FIG9, at least a portion of the reinforcing rib portion 2113 is located on the side of the main body portion 2114 close to the housing 10 along the first direction.

[0174] This helps to reduce the size of the rib section 2113 and also helps to reduce the overall outer contour size of the sealing section 21; thus, the rib section 2113 will not be exposed to the outside world, reducing the risk of the battery device 100 failing due to external impact during use.

[0175] In some embodiments, the size of the rib portion 2113 along the radial direction of the sealing portion 21 is not less than half the size of the main body portion 2114.

[0176] This helps the rib section 2113 to suppress the deformation of the main body section 2114 under the impact of the exhaust, and helps the main body section 2114 to stay in close contact with the box 10.

[0177] In some embodiments, the elastic deformable portion 212, the rib portion 2113, and the main body portion 2114 are each independent components, and the three are connected to each other. The connection method is not limited, for example, bonding.

[0178] In some embodiments, referring to FIG9, the reinforcing part 211 and the elastic deformation part 212 are an integral structure.

[0179] In other words, the elastic deformation part 212, the rib part 2113 and the main body part 2114 are all manufactured simultaneously from the same material, and the three are different parts of the same component.

[0180] This is beneficial to improving the manufacturing efficiency of the sealing part 21, and also to reducing the risk of damage to the sealing part 21 caused by the impact of emissions on the junction of the three components.

[0181] The specific process for achieving the integral structure of the reinforcing part 211 and the elastic deformation part 212 is not limited, such as injection molding, compression molding, extrusion molding, additive manufacturing, etc.

[0182] In some embodiments, referring to Figures 3 and 4, the projection of the contact area between the sealing part 21 and the housing 10 in the projection plane perpendicular to the first direction is an annular shape.

[0183] This is beneficial for the uniform distribution of the force applied to the sealing part 21 after the emission enters the buffer space 20a, reducing the probability that the part of the sealing part 21 other than the elastic deformation part 212 that is in contact with the housing 10 will separate from the housing 10 in advance due to the concentrated impact force of the emission; it is also beneficial for the elastic deformation part 212 to be subjected to uniform force, reducing the risk of damage due to concentrated force.

[0184] Understandably, when the battery device 100 is operating normally, the area where the reinforcing part 211 fits against the housing 10 is fan-shaped, and the area where the elastic deformation part 212 fits against the housing 10 is also fan-shaped.

[0185] In some embodiments, the material of the elastic deformation portion 212 is one of silicone rubber, fluororubber, and EPDM rubber.

[0186] This allows the elastic deformable part 212 to maintain a sealed fit with the housing 10 during normal operation of the battery device 100. On the one hand, it helps adapt to different working environments faced by the battery device 100. For example, when the battery device 100 is used on an aircraft, the aircraft faces a working environment with rapid temperature changes during takeoff and landing. This helps the elastic deformable part 212 maintain a sealed fit with the housing 10 and separate from the housing 10 in the event of thermal runaway of the battery device 100. On the other hand, it also helps reduce the risk that the elastic deformable part 212 may be damaged by the high temperature of the emissions during thermal runaway, resulting in the emissions not being discharged in the intended direction.

[0187] In some embodiments, referring to Figures 4 to 7, the pressure relief mechanism 20 includes a fixing part 22 extending along a first direction, and a sealing part 21 circumferentially disposed on the edge of the fixing part 22 perpendicular to the first direction. The end of the sealing part 21 perpendicular to the first direction away from the fixing part 22 is closer to the first end of the fixing part 22 than the end of the sealing part 21 that is closer to the fixing part 22 along the first direction. The first end can be fixed to the housing 10.

[0188] In other words, the sealing part 21 is inclined, and the end away from the fixing part 22 is closer to the box body 10.

[0189] This allows the end of the sealing part 21 furthest from the fixing part 22 to be deformed by the pre-tightening force of the casing 10 during the installation of the fixing part 22 and the casing 10 in the first direction. By applying the pre-tightening force to the sealing part 21, the sealing part 21 and the casing 10 are kept in contact during normal use of the battery device 100, reducing the probability of the sealing part 21 separating from the casing 10 due to factors such as collisions during normal use of the battery device 100, and helping to maintain the sealing of the buffer space 20a.

[0190] The specific method of fixing the fixing part 22 to the box body 10 is not limited.

[0191] In some embodiments, the fixing part 22 is bonded and fixed to the housing 10.

[0192] In some embodiments, referring to Figures 4 and 7, the housing 10 includes a mounting hole 10c, which is provided on the outer surface of the housing 10. A portion of the surface of the fixing part 22 perpendicular to the first direction is recessed to form a positioning groove 22a. A portion of the fixing part 22 can be inserted into the mounting hole 10c so that a portion of the housing 10 is embedded in the positioning groove 22a and stops and cooperates with the groove wall of the positioning groove 22a along the first direction.

[0193] Thus, through the limiting effect of the groove wall of the positioning groove 22a and the housing 10 along the first direction, the pressure relief mechanism 20 is kept fixed to the housing 10 along the first direction, which helps to suppress the displacement of the fixing part 22 along the first direction when the discharged material impacts the sealing part 21; the fixing method between the fixing part 22 and the housing 10 is simple and facilitates the installation of the pressure relief mechanism 20.

[0194] During the installation of the pressure relief mechanism 20, the fixing part 22 can be directly inserted into the mounting hole 10c from outside the housing 10.

[0195] In some embodiments, referring to FIG4, the mounting hole 10c is connected to the mounting space 10a, that is, the mounting hole 10c penetrates the housing 10. This simplifies the manufacturing process of the mounting hole 10c. A part of the pressure relief mechanism 20 is located in the mounting space 10a, which helps to improve the space utilization of the mounting space 10a.

[0196] In some embodiments, the end face of the fixing part 22 is tapered so that the fixing part 22 can be inserted into the mounting hole 10c.

[0197] In some embodiments, the inner wall of the mounting hole 10c is anti-rotationally fitted with the fixing part 22.

[0198] This helps reduce the probability that the orientation of the elastic deformation part 212 will change due to the pressure relief mechanism 20 rotating relative to the housing 10 when the battery device 100 comes into contact with an external object during normal use. It also helps ensure that the emission direction of the emitted material is directed in a preset direction after the battery device 100 experiences thermal runaway.

[0199] The specific method by which the inner wall of the mounting hole 10c and the fixing part 22 achieve the anti-rotation fit is not limited. For example, the cross section of the mounting hole 10c perpendicular to the first direction and the cross section of the fixing part 22 perpendicular to the first direction are both polygons or both ellipses.

[0200] In some embodiments, the material of the fixing part 22 is the same as the material of the elastic deformation part 212.

[0201] This will help to further simplify the manufacturing process of the pressure relief mechanism 20.

[0202] In some embodiments, the fixing part 22 and the elastic deformation part 212 are an integral structure.

[0203] This will help to further simplify the manufacturing process of the pressure relief mechanism 20 and improve production efficiency.

[0204] In some embodiments, referring to Figures 4 to 6, there are multiple discharge holes 10b, which are arranged around the periphery of the mounting hole 10c.

[0205] This is beneficial for ensuring that the flow rate of emissions entering the buffer space 20a meets the requirements, and for ensuring that the elastic deformation part 212 can separate from the housing 10 in a timely manner to discharge emissions after thermal runaway of the battery device 100.

[0206] It is understandable that the discharge from the outlet toward the reinforcement 211, after being obstructed by the reinforcement 211, can continue to flow in the buffer space 20a and flow out from the gap created by the separation of the elastic deformation part 212 from the housing 10.

[0207] The specific number of discharge holes 10b can be two, three, four, five, six, etc.

[0208] The battery device 100 in one embodiment of this disclosure is described in detail below:

[0209] The battery device 100 includes a housing 10 and a pressure relief mechanism 20. The housing 10 includes a discharge port 10b and a mounting hole 10c. The discharge port 10b communicates with the outside of the housing 10. The pressure relief mechanism 20 includes a sealing part 21 and a fixing part 22. The sealing part 21 is located outside the housing 10 and covers the housing 10 along a first direction. The sealing part 21 includes a reinforcing part 211 and an elastic deformation part 212. Both the reinforcing part 211 and the elastic deformation part 212 can be sealed and fitted with the housing 10 to jointly enclose a buffer space 20a that is isolated from the outside of the battery device 100. The discharge port 10b communicates with the buffer space 20a. The stiffness of the reinforcing part 211 is greater than the stiffness of the elastic deformation part 212, so that the pressure that drives the reinforcing part 211 to separate from the housing 10 due to the discharge from the discharge port is greater than the pressure that drives the elastic deformation part 212 to separate from the housing 10. The reinforcing part 211 includes an elastic sub-part 2112 and a reinforcing member 2111. The elastic sub-part 2112 can be sealed and fitted with the housing 10. The reinforcing member 2111 is fixed to the elastic sub-part 2112. The elastic sub-part 2112 is provided with a mounting groove 2112a. One side of the mounting groove 2112a is open. The reinforcing member 2111 is embedded in the mounting groove 2112a. Both sides of the mounting groove 2112a are open along the first direction. The reinforcing member 2111 is sealed and fitted with the inner wall of the mounting groove 2112a. In the projection plane perpendicular to the first direction, the projection of the sealing part 21 is annular. The projections of part 12 and the elastic deformation part 212 are both fan-shaped and coaxially arranged with the projection of part 21. The projection of the reinforcing member 2111 is located within the projection range of the elastic sub-part 2112. The projection of the reinforcing member 2111 is fan-shaped and coaxially arranged with the projection of the elastic sub-part 2112. At least a portion of the elastic sub-part 2112 is located on the side of the reinforcing member 2111 away from the central axis of the sealing part 21 along the radial direction of the sealing part 21, so as to be able to seal and fit with the housing 10. In the projection plane perpendicular to the first direction, the arc angle of the projection of the reinforcing member 2111 is not greater than 180°. In the projection plane perpendicular to the first direction, at least a portion of the projection of the outlet of the discharge hole 10b is located within the projection range of the reinforcing member 2111. The elastic sub-part 2112 is made of the same material as the elastic deformation part 212, and the two are integrally formed. The elastic sub-part 2112 is made of one of silicone rubber, fluororubber, or EPDM rubber, while the reinforcing member 2111 is made of one of polypropylene, polyamide, polycarbonate, or metal. In the projection plane perpendicular to the first direction, the projection of the contact area between the sealing part 21 and the housing 10 is annular. The elastic deformation part 212 is made of one of silicone rubber, fluororubber, or EPDM rubber. The fixing part 22 extends along the first direction, and the sealing part 21 is arranged around the edge of the fixing part 22 perpendicular to the first direction. The end of the sealing part 21 perpendicular to the first direction away from the fixing part 22 is closer to the fixing part 22 than the end closer to the fixing part 22. The first end is closer to the fixing part 22 along the first direction and can be fixed to the housing 10.Mounting holes 10c are provided on the outer surface of the housing 10. A portion of the fixing part 22 perpendicular to the first direction is recessed to form a positioning groove 22a. A portion of the fixing part 22 can be inserted into the mounting hole 10c, so that a portion of the housing 10 is embedded in the positioning groove 22a and engages with the groove wall of the positioning groove 22a along the first direction. The inner wall of the mounting hole 10c and the fixing part 22 have an anti-rotation fit. Multiple discharge holes 10b are provided, arranged circumferentially around the mounting hole 10c.

[0210] This disclosure also provides an energy storage device, which includes any of the battery devices 100 described in the foregoing embodiments.

[0211] This helps to reduce the probability that emissions from the battery device 100 will damage other components in the storage device in the event of thermal runaway.

[0212] This disclosure also provides an electrical device, referring to Figures 1 and 2, wherein the energy storage device includes any of the battery devices 100 in the foregoing embodiments or the energy storage devices in the foregoing embodiments.

[0213] This helps to reduce the probability that the emissions emitted by the battery device 100 will damage other components in the electrical device in the event of thermal runaway of the battery device 100.

[0214] In some embodiments, the electrical device includes an aircraft.

[0215] Aircraft generally refer to any device that flies within or outside the atmosphere (space), and can include both atmospheric aircraft and spacecraft. Aircraft can include airplanes, airships, etc., and for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional jets, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0216] This is beneficial for the aircraft to maintain normal operation even if the battery device 100 experiences thermal runaway.

[0217] The various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions.

[0218] The above description is merely a preferred embodiment of this disclosure and is not intended to limit the embodiments therein. Those skilled in the art will recognize various modifications and variations of the embodiments of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this disclosure should be included within the protection scope of the embodiments of this disclosure. Industrial applicability

[0219] This disclosure provides a battery device, an energy storage device, and an electrical device that can adjust the emission direction of pollutants and reduce the risk of pollutants causing damage to people or objects in the vicinity.

Claims

1. A battery device, wherein, The battery device includes: The housing includes a discharge port that communicates with the outside of the housing; The pressure relief mechanism includes a sealing part located outside the housing and covering the housing along a first direction. The sealing part includes a reinforcing part and an elastically deformable part, both of which can be sealed and fitted to the housing to jointly enclose a buffer space isolated from the outside of the battery device. The discharge port communicates with the buffer space. The stiffness of the reinforcing part is greater than that of the elastically deformable part, so that the pressure at which the discharge from the discharge port drives the reinforcing part to separate from the housing is greater than the pressure at which the elastically deformable part separates from the housing.

2. The battery device according to claim 1, wherein, The reinforcing part includes an elastic sub-part and a reinforcing member. The elastic sub-part can be sealed and fitted to the housing. The reinforcing member is fixed to the elastic sub-part. The elastic modulus of the material of the reinforcing member is greater than the elastic modulus of the material of the elastic sub-part.

3. The battery device according to claim 2, wherein, The elastic sub-part is provided with a mounting groove, one side of which is open, and the reinforcing member is embedded in the mounting groove.

4. The battery device according to claim 3, wherein, The mounting groove is open on both sides along the first direction, and the reinforcing member is sealed and fitted to the inner wall of the mounting groove.

5. The battery device according to any one of claims 2 to 4, wherein, In the projection plane perpendicular to the first direction, the projection of the sealing part is an annular shape, the projections of the elastic sub-part and the elastic deformation part are both fan-shaped, and their projections are arranged coaxially with the projection of the sealing part. The projection of the reinforcing member is located within the projection range of the elastic sub-part.

6. The battery device according to claim 5, wherein, In a projection plane perpendicular to the first direction, the projection of the reinforcing member is fan-shaped and coaxially arranged with the projection of the elastic sub-part. At least a portion of the elastic sub-part is located on the side of the reinforcing member that is radially away from the central axis of the sealing part, so as to be able to seal and fit with the housing.

7. The battery device according to claim 6, wherein, In a projection plane perpendicular to the first direction, the arc angle of the projection of the reinforcing member is no greater than 180°.

8. The battery device according to any one of claims 2 to 7, wherein, The reinforcing member is a strip-shaped structure extending radially along the sealing portion, and there are multiple reinforcing members, which are evenly arranged circumferentially along the sealing portion.

9. The battery device according to any one of claims 2 to 8, wherein, In a projection plane perpendicular to the first direction, at least a portion of the projection of the outlet of the discharge hole lies within the projection range of the reinforcement.

10. The battery device according to any one of claims 2 to 9, wherein, The material of the elastic sub-part is the same as the material of the elastic deformation part.

11. The battery device according to claim 10, wherein, The elastic sub-part and the elastic deformation part are an integral structure.

12. The battery device according to any one of claims 2 to 11, wherein, The material of the elastic sub-part is one of silicone rubber, fluororubber, and EPDM rubber; And / or, the material of the reinforcing member is one of polypropylene, polyamide, polycarbonate, or metal.

13. The battery device according to any one of claims 2 to 12, wherein, The elastic modulus of the material of the reinforcing member is greater than that of the material of the elastically deformable part.

14. The battery device according to claim 1, wherein, The reinforcing part is made of the same material as the elastically deformable part, and the maximum dimension of the reinforcing part along the first direction is greater than the maximum dimension of the elastically deformable part along the first direction.

15. The battery device according to claim 14, wherein, The reinforcing part includes a rib portion and a main body portion. In a projection plane perpendicular to the first direction, the projection of the sealing part is annular. The projections of the main body portion and the elastic deformation portion are both fan-shaped and their projections are coaxially arranged with the projection of the sealing part. The rib portion is located on at least one side of the main body portion along the first direction and protrudes from the main body portion along the first direction on at least one side. The rib portion extends radially along the sealing part.

16. The battery device according to claim 15, wherein, The number of the rib sections is multiple, and the multiple rib sections are arranged at intervals along the circumference of the sealing section.

17. The battery device according to claim 15, wherein, At least a portion of the rib section is located on the side of the main body section closer to the box body along the first direction.

18. The battery device according to any one of claims 14 to 17, wherein, The reinforcing part and the elastic deformation part are an integral structure.

19. The battery device according to any one of claims 1-18, wherein, In a projection plane perpendicular to the first direction, the projection of the area where the sealing part fits with the box body is an annular shape.

20. The battery device according to any one of claims 1-19, wherein, The material of the elastic deformation part is one of silicone rubber, fluororubber, and EPDM rubber.

21. The battery device according to any one of claims 1-20, wherein, The pressure relief mechanism includes a fixing part that extends along the first direction, and a sealing part that is circumferentially disposed on the edge of the fixing part perpendicular to the first direction. The end of the sealing part that is perpendicular to the first direction and away from the fixing part is closer to the first end of the fixing part than the end that is closer to the fixing part. The first end is able to be fixed to the housing.

22. The battery device according to claim 21, wherein, The housing includes a mounting hole on its outer surface. A portion of the fixing part perpendicular to the first direction is recessed to form a positioning groove. A portion of the fixing part can be inserted into the mounting hole so that a portion of the housing is embedded in the positioning groove and engages with the groove wall of the positioning groove along the first direction.

23. The battery device according to claim 22, wherein, The inner wall of the mounting hole and the fixing part are fitted together to prevent rotation.

24. The battery device according to claim 22 or 23, wherein, The number of discharge holes is multiple, and the discharge holes are arranged around the periphery of the mounting holes.

25. An energy storage device, wherein, Includes the battery device according to any one of claims 1 to 24.

26. An electrical appliance, wherein, Includes the battery device according to any one of claims 1 to 24 or the energy storage device according to claim 25.

27. The electrical appliance according to claim 26, wherein, The electrical equipment includes aircraft.

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