Battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model provides a battery device, an energy storage device and a power utilization device. The battery device comprises a battery monomer, a phase change part and a first heat conduction plate, the battery cell includes a pressure relief mechanism. The phase change piece is located on one side of the pressure relief mechanism in the first direction. The first heat conduction plate is located between the phase change piece and the pressure relief mechanism, a first heat conduction groove is formed in the surface of the side, facing the phase change piece, of the first heat conduction plate and is sunken towards the pressure relief mechanism in the first direction, and in a projection plane perpendicular to the first direction, at least part of the projection of the first heat conduction groove coincides with the projection of the pressure relief mechanism. At least part of the phase change piece is located in the first heat conduction groove. According to the battery device in the embodiment of the invention, the first heat conduction groove is arranged, so that the effect of diffusing the heat of the first heat conduction plate to one side of the phase change part is improved, the phase change part can absorb more heat from the first heat conduction plate more quickly, and the damage of the heat released by emissions to other devices in the battery device is reduced.

Description

Technical Field

[0001] This utility model 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 airflow generated by the 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 emissions from the pressure relief mechanism may impact other components around the battery cells, potentially causing further damage to the battery assembly. Utility Model Content

[0004] In view of this, the present invention aims to provide a battery device, energy storage device, and power supply device that are beneficial for reducing the temperature of the emissions discharged by the pressure relief mechanism.

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

[0006] This utility model embodiment provides a battery device, the battery device comprising:

[0007] Battery cell, including pressure relief mechanism;

[0008] The phase change element is located on one side of the pressure relief mechanism along the first direction;

[0009] A first heat-conducting plate is located between the phase change element and the pressure relief mechanism. A first heat-conducting groove is provided on the surface of the first heat-conducting plate facing the phase change element. The first heat-conducting groove is recessed towards the pressure relief mechanism along the first direction. In a projection plane perpendicular to the first direction, at least a portion of the projection of the first heat-conducting groove coincides with the projection of the pressure relief mechanism. At least a portion of the phase change element is located within the first heat-conducting groove.

[0010] The battery device in this embodiment improves the heat diffusion effect of the first heat-conducting plate to the phase change element by setting a first heat-conducting groove. By setting at least a portion of the phase change element in the first heat-conducting groove, the phase change element can absorb heat from the first heat-conducting plate more quickly and in greater quantities, thereby improving the cooling efficiency of the emissions and reducing the damage caused by the heat released by the emissions to other components in the battery device.

[0011] In some embodiments, the first heat-conducting groove includes a recess and a plurality of radiating grooves, the plurality of radiating grooves surrounding and communicating with the recess, the radiating grooves extending in a direction away from the recess, and at least a portion of the phase change element being located within the recess. Thus, the radiating grooves facilitate the diffusion of heat from the groove walls to other areas of the first heat-conducting plate, allowing the phase change element to better absorb heat from the first heat-conducting plate.

[0012] In some embodiments, the size of the radiation groove gradually decreases along the first direction away from the groove. This makes it easier for the groove wall to be closer to the part of the phase change element that is not in the groove, which helps to improve the efficiency of heat conduction from the groove wall to the phase change element.

[0013] And / or, in the projection plane perpendicular to the first direction, the projection outline of the radiation groove gradually narrows in the direction away from the groove, which is more conducive to the diffusion of heat from the first heat-conducting groove to the surrounding area and to the phase change component absorbing heat from the first heat-conducting plate more effectively.

[0014] In some embodiments, the groove walls are arc-shaped. This facilitates more even heat distribution to the portion of the phase change element located within the groove, improving the efficiency of heat absorption by the phase change element.

[0015] In some embodiments, there are multiple pressure relief mechanisms, and multiple first heat conduction grooves are configured in a one-to-one correspondence with each pressure relief mechanism. This ensures that when any pressure relief mechanism emits emissions, a first heat conduction groove can diffuse the heat, thereby improving the efficiency of the phase change element in absorbing heat and enhancing the cooling effect on the emissions.

[0016] In some embodiments, the battery device further includes a second heat-conducting plate, which is disposed on the side of the first heat-conducting plate opposite to the pressure relief mechanism and spaced apart from the first heat-conducting plate to form a first pressure relief cavity. At least a portion of the phase change element is disposed within the first pressure relief cavity. The second heat-conducting plate has a heat-conducting protrusion protruding along the first direction on the side facing the first heat-conducting plate. In a projection plane perpendicular to the first direction, at least a portion of the projection of the heat-conducting protrusion coincides with the projection of the pressure relief mechanism, and at least a portion of the phase change element contacts the heat-conducting protrusion. Thus, the heat absorbed by the heat-conducting protrusion can be diffused to other areas of the second heat-conducting plate, facilitating further heat transfer from the second heat-conducting plate to other parts of the phase change element within the first pressure relief cavity. This promotes phase change in more phase change materials to reduce the temperature of the emissions, mitigating the adverse effects of high-temperature emissions on other components within the battery device.

[0017] In some embodiments, the heat-conducting protrusion includes a main protrusion and a plurality of radial protrusions. The plurality of radial protrusions surround and connect to the main protrusion, and extend in a direction away from the main protrusion. The phase change element is in contact with the main protrusion. Thus, the radial protrusions facilitate the diffusion of heat absorbed by the main protrusion to other areas of the second heat-conducting plate, and allow the phase change element in the first pressure relief chamber to better absorb heat from the second heat-conducting plate.

[0018] In some embodiments, the size of the radial protrusion gradually decreases along the first direction in a direction away from the main protrusion;

[0019] And / or, in a projection plane perpendicular to the first direction, the projected profile of the radiating protrusion gradually narrows in a direction away from the main protrusion.

[0020] This allows the radiating protrusions to be smaller as heat diffuses away from the main protrusion, which facilitates the transfer of more heat to the phase change element, improves the efficiency of heat transfer, and enables the phase change material in the phase change element to undergo phase change more quickly when heated.

[0021] In some embodiments, the surface of the main protrusion is an arc surface. This facilitates more even heat diffusion from the main protrusion to the various radiating protrusions and other areas of the second heat-conducting plate.

[0022] In some embodiments, a portion of the phase change element is located on the side of the second heat-conducting plate opposite to the first heat-conducting plate. The surface of the second heat-conducting plate opposite to the first heat-conducting plate along the first direction has a second heat-conducting groove. In a projection plane perpendicular to the first direction, at least a portion of the projection of the second heat-conducting groove coincides with the projection of the pressure relief mechanism. At least a portion of the phase change element is located within the second heat-conducting groove. This improves the heat diffusion effect of the second heat-conducting plate to the phase change element on the side opposite to the pressure relief mechanism, allowing this portion of the phase change element to absorb heat from the second heat-conducting plate more quickly and in greater quantities. This improves the cooling efficiency of the emissions and reduces the damage caused by the heat released by the emissions to other components in the battery device.

[0023] In some embodiments, the first heat-conducting groove and the second heat-conducting groove have the same shape, which helps to simplify the manufacturing process of the first heat-conducting plate and the second heat-conducting plate, reduce manufacturing costs, and improve production efficiency.

[0024] And / or, in a projection plane perpendicular to the first direction, the projection of the first heat-conducting groove coincides with the projection of the second heat-conducting groove. This helps to shorten the length of the heat conduction path between the walls of the first and second heat-conducting grooves, and shortens the time for heat to be transferred to the phase change components on the side of the second heat-conducting plate away from the pressure relief mechanism. This allows the phase change materials in these phase change components to absorb heat more quickly through phase change, which helps to reduce the temperature of the emissions more quickly.

[0025] In some embodiments, there are multiple second heat-conducting plates, which are spaced apart along the first direction. A second pressure relief cavity is formed between two adjacent second heat-conducting plates, and some of the phase change components are disposed within the second pressure relief cavity. Thus, on the one hand, the multiple layers of second heat-conducting plates block emissions, which helps reduce the probability of emissions directly penetrating the battery device and being ejected; on the other hand, it helps to transfer heat to more phase change components, thereby improving the cooling effect on emissions.

[0026] In some embodiments, the battery device further includes a housing assembly with an installation space. The battery cell, the phase change element, the first heat-conducting plate, and the second heat-conducting plate are all located within the installation space. The inner wall of the installation space includes a first wall located on the side of the second heat-conducting plate opposite to the first heat-conducting plate along the first direction. The first wall and the second heat-conducting plate are spaced apart along the first direction to form a third pressure relief chamber, and part of the phase change element is disposed within the third pressure relief chamber. Thus, the second heat-conducting plate and the first wall limit the phase change element, and the phase change element within the third pressure relief chamber also reduces the risk of emissions melting through the second heat-conducting plate and directly burning the housing assembly, causing damage.

[0027] This application also provides an energy storage device, including the battery device described in any of the foregoing embodiments.

[0028] This application also provides an electrical device, including the battery device described in any of the foregoing embodiments or the energy storage device described in the foregoing embodiments. Thus, in the event of thermal runaway of a single battery cell, the probability of damage to other components within the electrical device due to the burning of emissions can be reduced.

[0029] In some embodiments, the electrical device includes an aircraft. This reduces the probability of damage to other components within the aircraft due to the burning of emissions in the event of thermal runaway of a single battery cell, thus extending the aircraft's ability to remain airborne. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of an embodiment of the present invention where the electrical device is a vehicle;

[0031] Figure 2 This is an exploded view of the battery device in one embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of a battery device in one embodiment of this application;

[0033] Figure 4 for Figure 3 A cross-sectional diagram of position AA in the middle;

[0034] Figure 5 for Figure 4 A magnified view of a portion of position B in the diagram;

[0035] Figure 6 This is a schematic diagram of the first heat-conducting plate in one embodiment of this application;

[0036] Figure 7 for Figure 6 A magnified view of the area at position C in the middle;

[0037] Figure 8 This is a schematic diagram of the second heat-conducting plate in one embodiment of this application;

[0038] Figure 9 for Figure 8 A magnified view of a portion of position D;

[0039] Figure 10 for Figure 8 A schematic diagram of an embodiment from another perspective.

[0040] Explanation of reference numerals in the attached figures

[0041] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing Assembly; 10a, Installation Space; 10b, First Pressure Relief Chamber; 10c, Second Pressure Relief Chamber; 10d, Third Pressure Relief Chamber; 11, First Housing; 12, Second Housing; 13, Pressure Relief Valve; 14, First Wall; 20, Battery Cell; 21, Pressure Relief Mechanism; 30, Phase Change Component; 31, Phase Change Material; 40, First Heat Conducting Plate; 40a, First Heat Conducting Groove; 40aa, Groove; 40ab, Radiation Groove; 50, Second Heat Conducting Plate; 50a, Second Heat Conducting Groove; 51, Heat Conducting Protrusion; 511, Main Protrusion; 512, Radiation Protrusion. Detailed Implementation

[0042] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of this utility model can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the spirit of this utility model and should not be regarded as an improper limitation of this utility model.

[0043] 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 invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the invention are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this utility model, 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 and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0045] 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 the present invention. 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.

[0046] In the description of this utility model embodiment, 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.

[0047] In the description of the embodiments of this utility model, for ease of explanation, as shown in the accompanying drawings, the direction of arrow X is referred to as the "first direction".

[0048] In the description of the embodiments of this utility model, unless otherwise explicitly 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 utility model according to the specific circumstances.

[0049] In the description of the embodiments of this utility model, unless otherwise explicitly 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 essentially no interaction force, or contact between two contacting parties with interaction force.

[0050] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0051] The battery cell 20 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 of this application are not limited to this.

[0052] A single battery cell 20 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the single battery cell 20, 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 between them while allowing active ions to pass through.

[0053] In some implementations, see Figure 4 and Figure 5 A pressure relief mechanism 21 is provided on the outer casing of the battery cell 20. The pressure relief mechanism 21 is used to release the internal gas of the battery cell 20.

[0054] As an example, the internal pressure or temperature of the battery cell 20 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism 21 is activated or a weak structure in the pressure relief mechanism 21 is broken, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0055] As an example, the pressure relief mechanism 21 can be integrally formed with the housing.

[0056] As an example, the pressure relief mechanism 21 can also be separately configured and connected to the housing.

[0057] The term "actuation" as used in this application refers to the pressure relief mechanism 21 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 21 may include, but are not limited to: movement of components within the pressure relief mechanism 21 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 21, etc. When the pressure relief mechanism 21 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as waste. This method allows for pressure and temperature relief of the battery cell 20 under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0058] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism 21 can be configured as a through hole for discharging gas inside the battery cell 20.

[0059] The emissions from the battery cell 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0060] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell 20 assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar.

[0061] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0062] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0063] In some embodiments, see Figure 2 The battery device 100 can be a battery pack, which includes a housing assembly 10 and one or more individual battery cells, the individual battery cells being housed in the housing assembly 10.

[0064] As an example, the battery cell assembly can be a battery module, which can be housed in the housing assembly 10 by fixing the battery module in the housing assembly 10.

[0065] As an example, the battery cell assembly can also be housed in the housing assembly 10 by directly fixing multiple battery cells 20 to the housing assembly 10.

[0066] As an example, see Figure 2The housing assembly 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 assembly 10 to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0067] As an example, the housing assembly 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing assembly 10 forms an enclosed space to accommodate the individual battery cells.

[0068] In some embodiments, the housing assembly 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing assembly 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing assembly 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0069] This application 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 100, which are 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.

[0070] 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 application embodiment can be any power system that requires energy storage devices.

[0071] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0072] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0073] 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.

[0074] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 100 via piping to regulate the temperature of the individual battery cells 20.

[0075] 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.

[0076] 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 an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0077] 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.

[0078] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0079] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles 1000, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0080] 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 application. The description is as follows with reference to the accompanying drawings.

[0081] Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in one embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Figure 1As shown, a battery device 100 is installed 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 starting, navigation, and driving.

[0082] In some embodiments of this application, 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.

[0083] The embodiments of this utility model will now be described in detail.

[0084] In the event of thermal runaway of the electrode assembly within the battery cell 20, the emissions generated by the electrode assembly are discharged from the pressure relief mechanism 21 of the battery cell 20 to reduce the probability of the battery cell 20 cracking or decomposing.

[0085] The battery device 100 includes battery cells 20, and the emissions emitted by the battery cells 20 flow in channels within the battery device 100 and are eventually discharged outside the battery device 100.

[0086] Understandably, the high temperature of the emissions emitted by the battery cell 20 can conduct heat to other components within the battery device 100 as it flows through the battery assembly 100, potentially causing damage to those components. For example, the emissions could heat other battery cells 20 that have not yet experienced thermal runaway, causing them to thermally run away and increasing the number of battery cells 20 experiencing thermal runaway within the battery assembly 100.

[0087] Based on the aforementioned technical problems, this application aims to provide a battery device 100. The battery device 100 has a first heat-conducting plate 40 between a pressure relief mechanism 21 and a phase change element 30. A first heat-conducting groove 40a is provided on the side of the first heat-conducting plate 40 facing the phase change element 30, and at least a portion of the phase change element 30 is located within the first heat-conducting groove 40a. The emissions ejected by the pressure relief mechanism 21 come into contact with the first heat-conducting plate 40, transferring heat to the first heat-conducting plate 40 and then more efficiently transferring heat to the phase change element 30 through the first heat-conducting groove 40a. This allows the phase change material 31 of the phase change element 30 to undergo a phase change and absorb heat, thereby reducing the temperature of the emissions.

[0088] Specifically, see Figures 3 to 5The battery device 100 includes a battery cell 20, a phase change element 30, and a first heat-conducting plate 40.

[0089] The battery cell 20 includes a pressure relief mechanism 21.

[0090] The phase change element 30 is located on one side of the pressure relief mechanism 21 along the first direction;

[0091] The first heat-conducting plate 40 is located between the phase change element 30 and the pressure relief mechanism 21. The surface of the first heat-conducting plate 40 facing the phase change element 30 is provided with a first heat-conducting groove 40a. The first heat-conducting groove 40a is recessed towards the pressure relief mechanism 21 along the first direction. In the projection plane perpendicular to the first direction, at least a portion of the projection of the first heat-conducting groove 40a coincides with the projection of the pressure relief mechanism 21. At least a portion of the phase change element 30 is located within the first heat-conducting groove 40a.

[0092] The pressure relief mechanism 21 can be opened under the pressure of the discharge inside the battery cell 20 to discharge the discharge outside the battery cell 20.

[0093] The phase change element 30 includes a phase change material 31, which can absorb heat by undergoing a phase change.

[0094] The emissions ejected by the pressure relief mechanism 21 can flow along the first direction toward the first heat-conducting plate 40 and come into contact with the first heat-conducting plate 40, so as to transfer some of the heat to the first heat-conducting plate 40. The first heat-conducting plate 40 can conduct heat to more phase change elements 30 more rapidly, so that the phase change materials 31 of more phase change elements 30 can undergo phase change to absorb more heat, thereby further reducing the temperature of the emissions.

[0095] At least a portion of the projection of the first heat-conducting groove 40a coincides with the projection of the pressure relief mechanism 21, so that the emissions emitted by the pressure relief mechanism 21 can be transferred to the portion of the first heat-conducting plate 40 that forms the first heat-conducting groove 40a more quickly.

[0096] It is understandable that the portion of the first heat-conducting plate 40 that forms the first heat-conducting groove 40a has a smaller dimension along the first direction compared to the portion of the first heat-conducting plate 40 that does not form the first heat-conducting groove 40a. This facilitates the faster passage of heat through this portion, so that the groove wall of the first guide groove can conduct heat to the portion of the phase change element 30 located in the first heat-conducting groove 40a more quickly.

[0097] Understandably, the increased surface area of ​​the first heat-conducting groove 40a facing the phase change element 30 increases the area for releasing heat to the phase change element 30, which is beneficial for heat diffusion.

[0098] The battery device 100 in this embodiment improves the effect of heat diffusion from the first heat-conducting plate 40 to the phase change element 30 by providing a first heat-conducting groove 40a. By placing at least a portion of the phase change element 30 in the first heat-conducting groove 40a, the phase change element 30 can absorb heat from the first heat-conducting plate 40 more quickly and in greater quantities, thereby improving the cooling efficiency of the emissions and reducing the damage caused by the heat released by the emissions to other components in the battery device 100.

[0099] The specific material of the phase change material 31 included in the phase change component 30 is not limited.

[0100] For example, the phase change material 31 includes one of n-tetradecyl alcohol, paraffin wax, stearic acid, lauric acid, hydrated salt of crystallization, hydrated salt of eutectic, and metal.

[0101] Thus, by using the above-mentioned materials, it is advantageous for the phase change material 31 to be in different phases under the normal operating conditions of the battery device 100 and under the heat effect of the emissions, so that the phase change material 31 can absorb more heat during the phase change process and reduce the temperature of the emissions.

[0102] In some embodiments, see Figure 5 The wall of the first heat conduction groove 40a is in contact with the phase change component 30.

[0103] This improves the efficiency of the first heat-conducting plate 40 in transferring heat to the phase change element 30, and helps the phase change element 30 absorb heat more quickly.

[0104] It is understood that in some embodiments where the number of phase change elements 30 is multiple, at least a portion of one phase change element 30 may be located within the first heat conduction groove 40a, or multiple phase change elements 30 may each have at least a portion located within the same first heat conduction groove 40a.

[0105] The specific number of the first heat conduction groove 40a is not limited; it can be one or more.

[0106] In some embodiments, see Figures 5 to 6 The first heat conduction groove 40a includes a groove 40aa and a plurality of radiation grooves 40ab. The plurality of radiation grooves 40ab surround the periphery of the groove 40aa and communicate with the groove 40aa. The radiation grooves 40ab extend in a direction away from the groove 40aa. At least a portion of the phase change element 30 is located in the groove 40aa.

[0107] Thus, the heat from the wall of the groove 40aa can be more easily diffused to other areas of the first heat-conducting plate 40 through the radiation groove 40ab, which is beneficial for the phase change element 30 to better absorb heat from the first heat-conducting plate 40.

[0108] The specific number of radiation tanks 40ab is not limited, for example, two, three, four, six, eight, etc.

[0109] It is understandable that both the radiation groove 40ab and the recess 40aa are open to the side away from the pressure relief mechanism 21.

[0110] In some embodiments, see Figure 5 Along the direction away from the groove 40aa, the dimension of the radiation groove 40ab gradually decreases along the first direction. The dimension of the radiation groove 40ab along the first direction is L1.

[0111] In other words, the farther the radiation groove 40ab is from the groove 40aa, the smaller the value of L1.

[0112] This allows the wall of the radiation groove 40ab to be closer to the part of the phase change element 30 that is not in the groove 40aa, which helps to improve the efficiency of heat conduction from the wall of the radiation groove 40ab to the phase change element 30.

[0113] In some embodiments, see Figure 6 and Figure 7 In the projection plane perpendicular to the first direction, the projection profile of the radiation groove 40ab gradually narrows along the direction away from the groove 40aa.

[0114] In other words, in the projection plane perpendicular to the first direction, the dimension of the radiation groove 40ab perpendicular to the direction away from the groove 40aa is L2, and L2 gradually decreases along the direction away from the groove 40aa.

[0115] This makes it easier for heat to diffuse from the first heat-conducting groove 40a to the surrounding area, and it also helps the phase change element 30 to better absorb heat from the first heat-conducting plate 40.

[0116] In some embodiments, see Figure 5 and Figure 7 The groove wall of the 40aa groove is a rounded surface.

[0117] This allows heat to be diffused more evenly to the portion of the phase change element 30 located within the groove 40aa, thereby improving the efficiency of the phase change element 30 in absorbing heat.

[0118] It is understood that there are multiple pressure relief mechanisms 21. It can be that a single battery cell 20 includes multiple pressure relief mechanisms 21, or multiple battery cells 20, each of which includes one or more pressure relief mechanisms 21.

[0119] In some embodiments where the number of pressure relief mechanisms 21 is multiple, see [reference]. Figure 4 and Figure 5 The number of first heat conduction grooves 40a is multiple and they are configured one-to-one with the pressure relief mechanism 21.

[0120] In this way, when any of the pressure relief mechanisms 21 ejects emissions, the first heat conduction groove 40a can diffuse the heat, thereby improving the efficiency of the phase change element 30 in absorbing heat and improving the cooling effect on the emissions.

[0121] It is understandable that after the emissions have been burning for a long time, part of the first heat-conducting plate 40 can be melted through by the emissions seat, so that the emissions can pass through the first heat-conducting plate 40 and enter the side of the first heat-conducting plate 40 away from the pressure relief mechanism 21 and come into direct contact with the phase change element 30.

[0122] Understandably, the thermal conductivity of the material of the first heat-conducting plate 40 is greater than that of the material forming the outer surface of the phase change element 30, so that the first heat-conducting plate 40 can transfer heat to more parts of the phase change element 30 more quickly.

[0123] In some embodiments, the material of the first heat-conducting plate 40 includes one of aluminum alloy, magnesium alloy, lithium-magnesium alloy, and lithium-aluminum alloy.

[0124] Thus, using the above-mentioned materials is beneficial to improving the heat conduction effect of the first heat-conducting plate 40, so that a larger area of ​​the phase change element 30 can be heated quickly; at the same time, the above-mentioned materials have high structural strength and can withstand the impact of emissions for a longer period of time; in addition, the material has low density, which is beneficial to reducing the overall weight of the battery device 100.

[0125] In some embodiments, see Figure 5 The battery device 100 also includes a second heat-conducting plate 50. The second heat-conducting plate 50 is disposed on the side of the first heat-conducting plate 40 away from the pressure relief mechanism 21 and is spaced apart from the first heat-conducting plate 40 to form a first pressure relief cavity 10b. Part of the phase change element 30 is disposed in the first pressure relief cavity 10b. The side of the second heat-conducting plate 50 facing the first heat-conducting plate 40 is provided with a heat-conducting protrusion 51 protruding along the first direction. In the projection plane perpendicular to the first direction, at least a portion of the projection of the heat-conducting protrusion 51 coincides with the projection of the pressure relief mechanism 21, and at least a portion of the phase change element 30 contacts the heat-conducting protrusion 51.

[0126] The phase change element 30 is sandwiched between the first heat-conducting plate 40 and the second heat-conducting plate 50. The first heat-conducting plate 40 and the second heat-conducting plate 50 can constrain the position of the phase change element 30, reducing the probability that the phase change element 30 will shift due to movement, vibration or other reasons in the battery device 100.

[0127] At least a portion of the heat-conducting protrusion 51 is located on the opposite side of the pressure relief mechanism 21 along the first direction and is in contact with the phase change element 30, such that the phase change element 30 located on the opposite side of the pressure relief mechanism 21 along the first direction or the discharge entering the first pressure relief chamber 10b can conduct heat to the heat-conducting protrusion 51.

[0128] The heat-conducting protrusion 51 protrudes from the surface of the second heat-conducting plate 50 on the side facing the pressure relief mechanism 21, thereby increasing the area for heat conduction.

[0129] Thus, the heat absorbed by the heat-conducting protrusion 51 can be diffused to other areas of the second heat-conducting plate 50 through the heat-conducting protrusion 51, which is conducive to the second heat-conducting plate 50 further transferring heat to other parts of the phase change element 30 in the first pressure relief chamber 10b. This is conducive to more phase change materials 31 undergoing phase change to reduce the temperature of the emissions and reduce the adverse effects of the high temperature of the emissions on other devices in the battery device 100.

[0130] It is understandable that one phase change element 30 may be in contact with the heat-conducting protrusion 51; or multiple phase change elements 30 may be in contact with the heat-conducting protrusion 51.

[0131] In some embodiments, see Figure 5 In the projection plane perpendicular to the first direction, at least a portion of the projection of the first heat-conducting groove 40a coincides with the projection of the heat-conducting protrusion 51.

[0132] This helps to shorten the length of the heat transfer path from the wall of the first heat-conducting groove 40a to the heat-conducting protrusion 51, which helps to improve the efficiency of heat transfer.

[0133] In some embodiments, see Figure 5 , Figure 8 and Figure 9 The heat-conducting protrusion 51 includes a main protrusion 511 and a plurality of radiating protrusions 512. The plurality of radiating protrusions 512 surround the periphery of the main protrusion 511 and are connected to the main protrusion 511. The radiating protrusions 512 extend in a direction away from the main protrusion 511. The phase change element 30 is in contact with the main protrusion 511.

[0134] Thus, the radiating protrusion 512 facilitates the diffusion of heat absorbed by the main protrusion 511 to other areas of the second heat-conducting plate 50, which in turn helps the phase change element 30 in the first pressure relief chamber 10b to better absorb heat from the second heat-conducting plate 50.

[0135] The specific number of radiating protrusions 512 is not limited, for example, two, three, four, six, eight, etc.

[0136] In some embodiments, the first pressure relief chamber 10b may be selectively connected to the outside of the battery device 100.

[0137] In this way, the emissions that have entered the first pressure relief chamber 10b and the phase change material 31 after the phase change have been discharged outside the battery device 100, reducing the risk of the battery device 100 cracking due to internal pressure.

[0138] The specific method for selectively connecting the first pressure relief chamber 10b to the external environment of the battery device 100 is not limited; for example, see [reference needed]. Figure 2 and Figure 5 The pressure relief valve 13 is connected to the first pressure relief chamber 10b. When the pressure in the first pressure relief chamber 10b meets the opening requirements of the pressure relief valve 13, the pressure relief valve 13 opens, so that the discharge in the first pressure relief chamber 10b passes through the pressure relief valve 13 and is discharged outside the battery device 100.

[0139] In some embodiments, see Figure 5 Along the direction away from the main protrusion 511, the size of the radial protrusion 512 gradually decreases along the first direction. The size of the radial protrusion 512 along the first direction is L3.

[0140] This allows the radiating protrusion 512 to have a smaller volume as heat diffuses away from the main protrusion 511, which facilitates the transfer of more heat to the phase change element 30, improves the efficiency of heat transfer, and allows the phase change material 31 in the phase change element 30 to undergo phase change more quickly when heated.

[0141] In some embodiments, see Figure 9 In the projection plane perpendicular to the first direction, the projection profile of the radiating protrusion 512 gradually narrows along the direction away from the main protrusion 511.

[0142] In other words, in the projection plane perpendicular to the first direction, the dimension of the radiating protrusion 512 perpendicular to the direction away from the main protrusion 511 is L4, and L4 gradually decreases along the direction away from the main protrusion 511.

[0143] This allows the radiating protrusion 512 to have a smaller volume as heat diffuses away from the main protrusion 511, which facilitates the transfer of more heat to the phase change element 30, improves the efficiency of heat transfer, and allows the phase change material 31 in the phase change element 30 to undergo phase change more quickly when heated.

[0144] In some embodiments, see Figure 5 and Figure 9 The surface of the main protrusion 511 is an arc surface.

[0145] This allows heat to be more evenly distributed from the main protrusion 511 to the various radiating protrusions 512 and other areas of the second heat-conducting plate 50.

[0146] In some embodiments where the number of pressure relief mechanisms 21 is multiple, see [reference]. Figure 5 The number of heat-conducting protrusions 51 is multiple and they are configured one-to-one with the pressure relief mechanism 21.

[0147] In this way, when any of the pressure relief mechanisms 21 ejects emissions, the heat-conducting protrusions 51 can further diffuse the heat, thereby improving the efficiency of the phase change element 30 in absorbing heat and enhancing the cooling effect on the emissions.

[0148] In some embodiments, the number of phase change elements 30 in the first pressure relief chamber 10b is multiple, and the multiple phase change elements 30 are spread out to form a layer perpendicular to the first direction, or stacked to form multiple layers along the first direction. This is beneficial to reduce the size of the phase change elements 30 so that some of the phase change elements 30 can contact the inner wall of the first heat conduction groove 40a and the heat conduction protrusion 51 respectively.

[0149] In some embodiments, see Figure 5 and Figure 10 A portion of the phase change element 30 is located on the side of the second heat-conducting plate 50 away from the first heat-conducting plate 40. The surface of the second heat-conducting plate 50 away from the first heat-conducting plate 40 along the first direction is provided with a second heat-conducting groove 50a. In the projection plane perpendicular to the first direction, at least a portion of the projection of the second heat-conducting groove 50a coincides with the projection of the pressure relief mechanism 21. At least a portion of the phase change element 30 is located in the second heat-conducting groove 50a.

[0150] In other words, the second heat-conducting plate 50 can transfer heat to the phase change element 30 located in the first pressure relief chamber 10b, and can also transfer heat to the phase change element 30 located on the side opposite to the pressure relief mechanism 21.

[0151] At least a portion of the projection of the second heat conduction groove 50a coincides with the projection of the pressure relief mechanism 21, which helps to shorten the length of the heat conduction path of the emitted material to the groove wall of the second heat conduction groove 50a and improve the heat transfer efficiency.

[0152] This improves the effect of heat diffusion from the second heat-conducting plate 50 to the phase change element 30 on the side away from the pressure relief mechanism 21, which helps the phase change element 30 absorb heat from the second heat-conducting plate 50 more quickly and in greater quantities, thereby improving the cooling efficiency of the emissions and reducing the damage caused by the heat released by the emissions to other components in the battery device 100.

[0153] It is understood that at least a portion of a phase change element 30 may be located within the second heat conduction groove 50a; or at least a portion of each of multiple phase change elements 30 may be located within the second heat conduction groove 50a.

[0154] In some embodiments, see Figure 6 and Figure 10 The first heat conduction groove 40a and the second heat conduction groove 50a have the same shape.

[0155] This simplifies the manufacturing process of the first heat-conducting plate 40 and the second heat-conducting plate 50, reduces manufacturing costs, and improves production efficiency.

[0156] In some embodiments, see Figure 5 In the projection plane perpendicular to the first direction, the projection of the first heat conduction groove 40a coincides with the projection of the second heat conduction groove 50a.

[0157] This helps to shorten the length of the heat conduction path between the wall of the first heat conduction groove 40a and the wall of the second heat conduction groove 50a, and shortens the time for heat to be transferred to the phase change element 30 on the side of the second heat conduction plate 50 away from the pressure relief mechanism 21. This allows the phase change material 31 in these phase change elements 30 to absorb heat more quickly through phase change, which helps to reduce the temperature of the emissions more quickly.

[0158] In some embodiments, see Figure 5 In the projection plane perpendicular to the first direction, the projections of the first heat conduction groove 40a, the heat conduction protrusion 51, and the second heat conduction groove 50a overlap with each other.

[0159] This is beneficial to further improve the efficiency of heat transfer to the phase change element 30 on the side of the second heat-conducting plate 50 away from the pressure relief mechanism 21.

[0160] Understandably, the thermal conductivity of the material of the second heat-conducting plate 50 is greater than that of the material forming the outer surface of the phase change element 30, so that the first heat-conducting plate 40 can transfer heat more quickly to more parts of the phase change element 30.

[0161] In some embodiments, the material of the second heat-conducting plate 50 includes one of aluminum alloy, magnesium alloy, lithium-magnesium alloy, and lithium-aluminum alloy.

[0162] Thus, using the above-mentioned materials is beneficial to improving the heat conduction effect of the second heat-conducting plate 50, so that a larger area of ​​the phase change element 30 can be heated quickly; at the same time, the above-mentioned materials have high structural strength and can withstand the impact of emissions for a longer period of time; in addition, the material has low density, which is beneficial to reducing the overall weight of the battery device 100.

[0163] In some embodiments, the first heat-conducting plate 40 is made of the same material as the second heat-conducting plate 50 to simplify the manufacturing process and reduce manufacturing costs.

[0164] It is understandable that after prolonged burning of the emissions, a portion of the second heat-conducting plate 50 can be melted through by the emissions seat, allowing the emissions to pass through the second heat-conducting plate 50 and enter the side of the second heat-conducting plate 50 away from the pressure relief mechanism 21.

[0165] In some embodiments, see Figure 5There are multiple second heat-conducting plates 50, which are spaced apart along the first direction. A second pressure relief cavity 10c is formed between two adjacent second heat-conducting plates 50, and some phase change components 30 are disposed in the second pressure relief cavity 10c.

[0166] Thus, on the one hand, the multi-layer second heat-conducting plate 50 blocks the emissions, which helps reduce the probability that the emissions will directly penetrate the battery device 100 and be ejected directly; on the other hand, it helps to transfer heat to more phase change components 30, so as to improve the cooling effect on the emissions.

[0167] In some embodiments, the second pressure relief chamber 10c may be selectively connected to the outside of the battery device 100.

[0168] In this way, the emissions that have entered the second pressure relief chamber 10c and the phase change material 31 after the phase change have been discharged outside the battery device 100, reducing the risk of the battery device 100 cracking due to internal pressure.

[0169] In some embodiments with a pressure relief valve 13, the second pressure relief chamber 10c is selectively connected to the outside of the battery device 100 via the pressure relief valve 13.

[0170] In some embodiments, see Figure 4 and Figure 5 The battery device 100 also includes a housing assembly 10, in which an installation space 10a is provided. The battery cell 20, phase change element 30, first heat-conducting plate 40 and second heat-conducting plate 50 are all located in the installation space 10a. The inner wall of the installation space 10a includes a first wall 14, which is located on the side of the second heat-conducting plate 50 away from the first heat-conducting plate 40 along a first direction. The first wall 14 and the second heat-conducting plate 50 are spaced apart along the first direction to form a third pressure relief chamber 10d. Part of the phase change element 30 is located in the third pressure relief chamber 10d.

[0171] The housing assembly 10 provides mounting positions for the battery cell 20, the first heat-conducting plate 40, the second heat-conducting plate 50, and the phase change element 30, and also provides a certain degree of protection.

[0172] Thus, the second heat-conducting plate 50 and the first wall 14 limit the phase change component 30, and the phase change component 30 in the third pressure relief chamber 10d also reduces the risk of the emitted material melting through the second heat-conducting plate 50 and directly burning the housing assembly 10, causing damage to it.

[0173] In some embodiments, the third pressure relief chamber 10d may be selectively connected to the outside of the battery device 100.

[0174] In this way, the emissions entering the third pressure relief chamber 10d and the phase change material 31 after the phase change are discharged outside the battery device 100, reducing the risk of the battery device 100 cracking due to internal pressure.

[0175] In some embodiments with a pressure relief valve 13, the third pressure relief chamber 10d is selectively connected to the outside of the battery device 100 via the pressure relief valve 13.

[0176] A specific embodiment of this application is described below:

[0177] The battery device 100 includes a battery cell 20, a first heat-conducting plate 40, a second heat-conducting plate 50, and a housing assembly 10. The battery cell 20 includes a pressure relief mechanism 21; a phase change element 30 is located on one side of the pressure relief mechanism 21 along a first direction; the first heat-conducting plate 40 is located between the phase change element 30 and the pressure relief mechanism 21, and a first heat-conducting groove 40a is provided on the surface of the first heat-conducting plate 40 facing the phase change element 30. The first heat-conducting groove 40a is recessed towards the pressure relief mechanism 21 along the first direction. In a projection plane perpendicular to the first direction, at least a portion of the projection of the first heat-conducting groove 40a coincides with the projection of the pressure relief mechanism 21. The first heat-conducting groove 40a includes a groove 40aa and a plurality of radiating grooves 40ab. The plurality of radiating grooves 40ab surround the periphery of the groove 40aa and communicate with the groove 40aa. The radiating grooves 40ab extend in a direction away from the groove 40aa. At least a portion of the phase change element 30 is located within the groove 40aa. Along the direction away from the groove 40aa, the size of the radiation groove 40ab gradually decreases along the first direction; in the projection plane perpendicular to the first direction, the projected outline of the radiation groove 40ab gradually narrows along the direction away from the groove 40aa. The groove wall of the groove 40aa is an arc surface. There are multiple pressure relief mechanisms 21, and multiple first heat conduction grooves 40a are configured in a one-to-one correspondence with the pressure relief mechanisms 21. The second heat-conducting plate 50 is disposed on the side of the first heat-conducting plate 40 away from the pressure relief mechanism 21 and is spaced apart from the first heat-conducting plate 40 to form a first pressure relief cavity 10b. At least a portion of the phase change element 30 is disposed within the first pressure relief cavity 10b. The side of the second heat-conducting plate 50 facing the first heat-conducting plate 40 has a heat-conducting protrusion 51 protruding along a first direction. In a projection plane perpendicular to the first direction, at least a portion of the projection of the heat-conducting protrusion 51 coincides with the projection of the pressure relief mechanism 21. The heat-conducting protrusion 51 includes a main protrusion 511 and a plurality of radial protrusions 512. The plurality of radial protrusions 512 surround the periphery of the groove 40aa and are connected to the main protrusion 511. The radial protrusions 512 extend in a direction away from the main protrusion 511, and the phase change element 30 contacts the main protrusion 511. Along the direction away from the main protrusion 511, the size of the radial protrusions 512 gradually decreases along the first direction; the projected outline of the radial protrusions 512 gradually narrows along the direction away from the main protrusion 511. The surface of the main protrusion 511 is an arc surface. A portion of the phase change element 30 is located on the side of the second heat-conducting plate 50 opposite to the first heat-conducting plate 40. The surface of the second heat-conducting plate 50 opposite to the first heat-conducting plate 40 along the first direction is provided with a second heat-conducting groove 50a. In a projection plane perpendicular to the first direction, at least a portion of the projection of the second heat-conducting groove 50a coincides with the projection of the pressure relief mechanism 21. At least a portion of the phase change element 30 is located within the second heat-conducting groove 50a. The first heat-conducting groove 40a and the second heat-conducting groove 50a have the same shape; in a projection plane perpendicular to the first direction, the projection of the first heat-conducting groove 40a coincides with the projection of the second heat-conducting groove 50a.The housing assembly 10 has an installation space 10a. The battery cell 20, phase change element 30, first heat conduction plate 40 and second heat conduction plate 50 are all located in the installation space 10a. The inner wall of the installation space 10a includes a first wall 14. The first wall 14 is located on the side of the second heat conduction plate 50 away from the first heat conduction plate 40 along the first direction. The first wall 14 and the second heat conduction plate 50 are spaced apart along the first direction to form a third pressure relief chamber 10d. Part of the phase change element 30 is located in the third pressure relief chamber 10d.

[0178] This application also provides an energy storage device, which includes the battery device 100 in the foregoing embodiments.

[0179] In this way, in the event of thermal runaway of the battery cell 20, the probability of damage to other components in the energy storage device due to the burning of emissions can be reduced.

[0180] This application also provides an electrical device, which includes the battery device 100 in the foregoing embodiments or the energy storage device in the foregoing embodiments.

[0181] In this way, in the event of thermal runaway of the battery cell 20, the probability of damage to other components in the electrical device due to the burning of emissions can be reduced.

[0182] In some embodiments, the electrical device includes an aircraft.

[0183] Aircraft generally refer to machines that fly within or outside the atmosphere (space), and can include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft can include airplanes, airships, etc., and for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional aircraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0184] In this way, in the event of thermal runaway of the battery cell 20, the probability of damage to other components inside the aircraft due to the burning of emissions can be reduced, thus extending the aircraft's ability to maintain flight.

[0185] The various embodiments / implementations provided by this utility model can be combined with each other without creating contradictions.

[0186] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the embodiments of the present utility model. For those skilled in the art, the embodiments of the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present utility model should be included within the protection scope of the embodiments of the present utility model.

Claims

1. A battery device, characterized by, The battery device includes: Battery cell, including pressure relief mechanism; The phase change element is located on one side of the pressure relief mechanism along the first direction; A first heat-conducting plate is located between the phase change element and the pressure relief mechanism. A first heat-conducting groove is provided on the surface of the first heat-conducting plate facing the phase change element. The first heat-conducting groove is recessed towards the pressure relief mechanism along the first direction. In a projection plane perpendicular to the first direction, at least a portion of the projection of the first heat-conducting groove coincides with the projection of the pressure relief mechanism. At least a portion of the phase change element is located within the first heat-conducting groove.

2. The battery device according to claim 1, characterized by The first heat-conducting groove includes a groove and a plurality of radiation grooves. The plurality of radiation grooves surround the periphery of the groove and communicate with the groove. The radiation grooves extend in a direction away from the groove. At least a portion of the phase change element is located within the groove.

3. The battery device of claim 2, wherein, Along a direction away from the groove, the size of the radiating groove gradually decreases along the first direction; And / or, in a projection plane perpendicular to the first direction, the projected profile of the radiating groove gradually narrows in a direction away from the groove.

4. The battery device of claim 2, wherein The groove wall is an arc surface.

5. The battery device of claim 1, wherein There are multiple pressure relief mechanisms, and there are multiple first heat conduction grooves, each corresponding to one of the pressure relief mechanisms.

6. The battery device of claim 1, wherein The battery device further includes a second heat-conducting plate, which is disposed on the side of the first heat-conducting plate away from the pressure relief mechanism and spaced apart from the first heat-conducting plate to form a first pressure relief cavity. At least a portion of the phase change element is disposed in the first pressure relief cavity. The side of the second heat-conducting plate facing the first heat-conducting plate is provided with a heat-conducting protrusion protruding along the first direction. In a projection plane perpendicular to the first direction, at least a portion of the projection of the heat-conducting protrusion coincides with the projection of the pressure relief mechanism, and at least a portion of the phase change element is in contact with the heat-conducting protrusion.

7. The battery device of claim 6, wherein The thermally conductive protrusion includes a main protrusion and multiple radial protrusions. The multiple radial protrusions surround the periphery of the main protrusion and are connected to the main protrusion. The radial protrusions extend in a direction away from the main protrusion, and the phase change element is in contact with the main protrusion.

8. The battery device according to claim 7, characterized in that, Along a direction away from the main protrusion, the size of the radial protrusion gradually decreases along the first direction; And / or, in a projection plane perpendicular to the first direction, the projected profile of the radiating protrusion gradually narrows in a direction away from the main protrusion.

9. The battery device of claim 7, wherein, The surface of the main protrusion is an arc surface.

10. The battery device of claim 6, wherein Part of the phase change element is located on the side of the second heat-conducting plate away from the first heat-conducting plate. The surface of the second heat-conducting plate away from the first heat-conducting plate along the first direction is provided with a second heat-conducting groove. In a projection plane perpendicular to the first direction, at least a portion of the projection of the second heat-conducting groove coincides with the projection of the pressure relief mechanism. At least a portion of the phase change element is located in the second heat-conducting groove.

11. The battery device of claim 10, wherein, The first heat-conducting groove and the second heat-conducting groove have the same shape; And / or, in a projection plane perpendicular to the first direction, the projection of the first heat-conducting groove coincides with the projection of the second heat-conducting groove.

12. The battery device of claim 6, wherein, The number of the second heat-conducting plates is multiple, and the multiple second heat-conducting plates are spaced apart along the first direction. A second pressure relief cavity is formed between two adjacent second heat-conducting plates, and part of the phase change element is disposed in the second pressure relief cavity.

13. The battery device of claim 6, wherein, The battery device further includes a housing assembly, which has an installation space. The battery cell, the phase change element, the first heat-conducting plate, and the second heat-conducting plate are all located within the installation space. The inner wall of the installation space includes a first wall, which is located on the side of the second heat-conducting plate away from the first heat-conducting plate along the first direction. The first wall and the second heat-conducting plate are spaced apart along the first direction to form a third pressure relief chamber, and part of the phase change element is located within the third pressure relief chamber.

14. An energy storage device, characterized by Includes the battery device according to any one of claims 1 to 13.

15. An electrical device, comprising: Includes the battery device according to any one of claims 1 to 13 or the energy storage device according to claim 14.

16. The powered device of claim 15, wherein, The electrical equipment includes aircraft.

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