Battery device and electric device

Abstract

The application discloses a battery device and an electric device. The battery device comprises a box body, an attachment component and a separation component. A battery cell is accommodated in the box body. The battery cell comprises a first wall, which is arranged opposite to a bottom wall of the box body. The first wall is provided with a pressure relief mechanism. The attachment component is provided with a first through hole, which is arranged corresponding to the pressure relief mechanism. A surface of the attachment component, which faces the first wall, is attached to the first wall. The separation component comprises an avoiding portion and a connecting portion. The avoiding portion is arranged in the first through hole and is arranged spaced apart from the pressure relief mechanism. The connecting portion connects the avoiding portion and the attachment component. The avoiding portion is provided with a second through hole, thereby improving the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device and an electrical device. Background Technology

[0002] During the use of a battery device, individual battery cells may leak electrolyte due to factors such as impact or aging. When a battery cell leaks electrolyte, the electrolyte accumulates at the bottom of the battery device, which affects the insulation of the entire battery device.

[0003] Therefore, improving the reliability of battery devices has become an urgent problem to be solved. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0005] In a first aspect, a battery device is provided, including a housing, an attachment member, and an isolation member. A battery cell is housed in the housing, and the battery cell includes a first wall, which is disposed opposite to the bottom wall of the housing. The first wall is provided with a pressure relief mechanism. The attachment member is provided with a first through hole, which corresponds to the pressure relief mechanism, and the surface of the attachment member facing the first wall is attached to the first wall. The isolation member includes a clearance portion and a connecting portion. The clearance portion is disposed within the first through hole and is spaced apart from the pressure relief mechanism. The connecting portion connects the clearance portion and the attachment member. The clearance portion is provided with a second through hole.

[0006] In the technical solution provided in this application embodiment, the electrical cavity and gas collection cavity of the battery device are separated by the attachment component, and the emissions during the thermal runaway process of the battery cell are discharged through the first through hole, which can reduce the possibility of thermal runaway propagation in the event of thermal runaway of the battery cell. The avoidance portion of the isolation component can reduce the impact of the adhesive on the pressure relief mechanism when the attachment component is attached to the first wall. Furthermore, the avoidance portion is provided with a second through hole, which allows the leaked electrolyte to flow out in the event of leakage from the battery cell, thereby reducing the accumulation of electrolyte at the bottom of the battery device and improving the reliability of the battery device.

[0007] In some embodiments, the portion of the clearance section closer to the second through hole is further away from the pressure relief mechanism than the portion of the clearance section further away from the second through hole.

[0008] In the technical solution provided in this application embodiment, the portion of the clearance part near the second through hole is further away from the pressure relief mechanism than the portion of the clearance part away from the second through hole. The electrolyte leaked from the battery cell can collect along the clearance part towards the second through hole, which can further reduce the accumulation of electrolyte at the bottom of the battery device, thereby improving the reliability of the battery device.

[0009] In some embodiments, the second through hole and the connecting portion are connected by a bevel or a curved surface.

[0010] In some embodiments, the second through hole and the connecting portion are connected by a stepped structure.

[0011] In some embodiments, the clearance portion is provided with a plurality of second through holes, which are disposed in the portion of the clearance portion near the inner wall of the first through hole.

[0012] In the technical solution provided in this application embodiment, a plurality of second through holes are disposed in the portion of the avoidance part near the inner wall of the first through hole, which can reduce the impact force of the airflow generated by the battery cell in the event of thermal runaway on the pressure relief mechanism of other battery cells, thereby reducing the possibility of the pressure relief mechanism opening due to the impact of high pressure airflow on the pressure relief mechanism, thereby improving the reliability of the battery device.

[0013] In some embodiments, the battery device further includes a protective member disposed on the side of the clearance portion away from the pressure relief mechanism.

[0014] In the technical solution provided in this application embodiment, by setting a protective component on the side of the avoidance part away from the pressure relief mechanism, when the battery cell experiences thermal runaway, the contents discharged into the gas collection chamber through the first through hole and rebounding can be blocked by the protective component, thereby reducing the possibility of the isolation component being damaged, and thus improving the reliability of the battery device.

[0015] In some embodiments, the protective component is provided with a third through hole, which is provided corresponding to the clearance portion.

[0016] In the technical solution provided in this application embodiment, the protective component is provided with a third through hole. In the event of leakage of a single battery cell, the leaked electrolyte can flow out through the second through hole provided in the clearance part and then continue to flow into the gas collection chamber through the third through hole provided in the protective component, thereby reducing the accumulation of electrolyte at the bottom of the battery device and thus improving the reliability of the battery device.

[0017] In some embodiments, the third through hole is offset from the second through hole along the thickness direction of the protective member.

[0018] In the technical solution provided in this application embodiment, the third through hole and the second through hole are staggered along the thickness direction of the protective component, thereby reducing the possibility that when a battery cell experiences thermal runaway, the emissions discharged into the gas collection chamber will directly rebound to the pressure relief mechanism of the adjacent battery cell, thereby improving the reliability of the battery device.

[0019] In some embodiments, the protective component is provided with a plurality of third through holes, which are located on the portion of the protective component near the inner wall of the first through hole.

[0020] In the technical solution provided in this application embodiment, the third through hole and the second through hole are staggered along the thickness direction of the protective component, and multiple third through holes are disposed on the portion of the protective component near the inner wall of the first through hole. On the one hand, airflow from the side of the attachment component near the first wall can flow through the second and third through holes, thereby meeting the airflow requirements. On the other hand, this arrangement can reduce the impact of high-pressure airflow on the pressure relief mechanism of adjacent battery cells when a battery cell experiences thermal runaway, thereby improving the reliability of the battery device.

[0021] In some embodiments, the battery device further includes a support member disposed between the attachment member and the bottom wall of the housing to support the attachment member.

[0022] In the technical solution provided in this application embodiment, by setting a support component between the bottom wall of the housing and the attached component, the impact of external impact and vibration on the internal components of the battery device can be reduced when the battery device is subjected to impact and vibration, thereby improving the reliability of the battery device.

[0023] In some embodiments, at least a portion of the surface of the support member facing the attachment member overlaps at least a portion of the surface of the protective member away from the first wall.

[0024] In the technical solution provided in this application embodiment, at least a portion of the surface of the supporting member facing the attachment member is pressed against the surface of the protective member away from the first wall. The side of the protective member away from the first wall can be supported by the supporting member, thereby reducing the possibility of the protective member falling off, thereby improving the protective effect of the protective member and thus improving the reliability of the battery device.

[0025] In some embodiments, a plurality of support members are provided on both sides of the first through hole along a first direction, the first direction being parallel to the first wall; wherein, at least two support members located on both sides of the first through hole along the first direction are staggered in a second direction, the second direction being perpendicular to the first direction and parallel to the first wall.

[0026] In the technical solution provided in this application embodiment, at least two support members located on both sides of the first through hole are staggered in the second direction, so that the airflow discharged from the first through hole can flow smoothly. At the same time, it can block large particles and reduce the accumulation of particles, thereby improving the reliability of the battery device.

[0027] In some embodiments, the first region of the attachment member is bonded to the first wall by an adhesive, the first region is provided with a fourth through hole, and the surface of the support member facing the attachment member is provided with a first groove, the opening of the first groove being disposed opposite to the fourth through hole so that a portion of the adhesive can enter the first groove through the fourth through hole.

[0028] In the technical solution provided in this application embodiment, a fourth through hole is provided in the first region of the attachment component, so that the adhesive can overflow from the fourth through hole to reduce the impact of the overflow adhesive on other components in the battery device. The support component is provided with a first groove to receive the adhesive overflowing from the fourth through hole, thereby reducing the impact of the adhesive overflow on the exhaust performance of the gas collecting chamber. At the same time, it can also improve the uniformity of the force on the attachment component, thereby improving the reliability of the battery device.

[0029] In a second aspect, an electrical device is provided, which includes a battery device as described in any implementation of the first aspect, the battery device being used to supply power to the electrical device.

[0030] In some embodiments, the electrical device is a vehicle, a ship, or a spacecraft. Attached Figure Description

[0031] Figure 1 A schematic diagram of the structure of a vehicle according to one embodiment of this application is shown; Figure 2 A partial structural schematic diagram of the battery device according to an embodiment of this application is shown; Figure 3 A partial perspective view of a battery device according to one embodiment of this application is shown; Figure 4 A partial cross-sectional schematic diagram of a battery device in one embodiment of this application is shown; Figure 5 A side sectional view of a battery device according to one embodiment of this application is shown; Figure 6 This application shows Figure 5 A partially enlarged schematic diagram of part A of the battery device; Figure 7 A schematic diagram of the isolation component in the battery device provided in an embodiment of this application is shown; Figure 8 This invention illustrates a schematic diagram of another possible isolation component of a battery device provided in one embodiment of the present application; Figure 9 This application shows Figure 8 Enlarged schematic diagram of part B of the central isolation component; Figure 10 This invention illustrates another possible isolation component of a battery device according to a certain embodiment of the present application; Figure 11 A partial cross-sectional schematic diagram of a battery device provided in another embodiment of this application is shown; Figure 12 A schematic diagram of the bottom portion of a battery device provided in another embodiment of this application is shown; Figure 13 This application shows another possible bottom schematic diagram of a battery device provided in another embodiment; Figure 14 A schematic diagram of the bottom portion of a battery device according to another embodiment of this application is shown; Figure 15 This application shows Figure 14 An enlarged schematic diagram of section C of the battery device provided in the diagram; Figure 16 A side sectional view of a battery device provided in another embodiment of this application is shown; Figure 17 This application shows Figure 16 Enlarged view of section D of the battery device.

[0032] Figure label: 1-Vehicle; 10-Battery unit; 11-Box; 111-First box section; 112-Second box section; 1121-Bottom wall; 13-Attachment component; 131-First through hole; 132-Fourth through hole; 14-Isolation component; 141-Apartment; 1411-Step structure; 142-Connecting part; 143-Second through hole; 15-Support component; 152-First groove; 151-Second groove; 171-Reinforcing rib; 16-Protective component; 161-Third through hole; 20-Battery cell; 210-First wall; 30-Controller; 40-Motor. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0035] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, 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, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0038] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0039] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0040] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0041] In this embodiment of the application, 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.

[0042] 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 of this application are not limited to this.

[0043] In some implementations, the battery cell is provided with a pressure relief mechanism. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0044] As an example, the internal pressure or temperature of a battery cell 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 reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating 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.

[0045] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0046] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0047] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0048] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0049] The emissions from battery cells 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.

[0050] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0051] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0052] 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.

[0053] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0054] 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.

[0055] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0056] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0057] 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.

[0058] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0059] The technical solutions described in the embodiments of this application 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.

[0060] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0061] During the use of a battery device, individual battery cells may leak electrolyte due to factors such as impact or aging. When a battery cell leaks electrolyte, the electrolyte accumulates at the bottom of the battery device, which affects the insulation of the entire battery device.

[0062] Therefore, improving the reliability of battery devices has become an urgent problem to be solved.

[0063] This application provides a battery device, including a housing, an attachment component, and an isolation component. A single battery cell is housed in the housing, and the battery cell includes a first wall, which is disposed opposite to the bottom wall of the housing. The first wall is provided with a pressure relief mechanism. The attachment component has a first through hole, which corresponds to the pressure relief mechanism, and the surface of the attachment component facing the first wall is attached to the first wall. The isolation component includes a clearance portion and a connecting portion. The clearance portion is disposed within the first through hole and is spaced apart from the pressure relief mechanism. The connecting portion connects the clearance portion and the attachment component. The clearance portion has a second through hole.

[0064] In the technical solution provided in this application embodiment, the electrical cavity and gas collection cavity of the battery device are separated by the attachment component, and the emissions during the thermal runaway process of the battery cell are discharged through the first through hole, which can reduce the possibility of thermal runaway propagation in the event of thermal runaway of the battery cell. The avoidance portion of the isolation component can reduce the impact of the adhesive on the pressure relief mechanism when the attachment component is attached to the first wall. Furthermore, the avoidance portion is provided with a second through hole, which allows the leaked electrolyte to flow out in the event of leakage from the battery cell, thereby reducing the accumulation of electrolyte at the bottom of the battery device and improving the reliability of the battery device.

[0065] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0066] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0067] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0068] For example, such as Figure 1The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 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. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0069] For example, Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 10 of this application embodiment may include a plurality of battery cells 20 to meet different power usage requirements. The shape of the battery cell 20 in this application embodiment can be set according to actual application. For example, the battery cell 20 can be as follows: Figure 2 The prism shape shown, or it could be different. Figure 2 The embodiments shown may be cuboids or other shapes, but are not limited to these.

[0070] It should be understood that, such as Figure 2 As shown, the battery device 10 of this embodiment may further include a housing 11, which can be used to accommodate multiple battery cells 20. The housing 11 of this embodiment has a hollow interior, and the multiple battery cells 20 are accommodated within the housing 11. The housing 11 may include two parts, referred to herein as a first housing portion 111 and a second housing portion 112, which are fastened together. The shapes of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components housed inside, for example, according to the shape of the combination of the multiple battery cells 20 housed inside. At least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, the first housing portion 111 and the second housing portion 112 can both be hollow cuboids with one open side each. The openings of the first housing portion 111 and the second housing portion 112 are opposite to each other, and the first housing portion 111 and the second housing portion 112 are interlocked to form a housing 11 with a closed cavity, which can be used to accommodate multiple battery cells 20. The multiple battery cells 20 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the interlocking of the first housing portion 111 and the second housing portion 112.

[0071] For example, such as Figure 2 As shown, either the first housing portion 111 or the second housing portion 112 may have only one hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 112 as a hollow cuboid with one opening and the first housing portion 111 as a plate-shaped example, then the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0072] Combination Figures 3 to 7 This application describes a battery device 10 provided in one embodiment.

[0073] Figure 3 A partial perspective view of the battery device 10 in one embodiment of this application is shown; Figure 4 A partial cross-sectional schematic diagram of the battery device 10 in one embodiment of this application is shown; Figure 5 A side sectional view of a battery device 10 according to a certain embodiment of this application is shown; Figure 6 This application shows Figure 5 A partially enlarged schematic diagram of part A of the battery device 10; Figure 7 A schematic diagram of the isolation component 14 in the battery device 10 provided in this application embodiment is shown.

[0074] This application provides a battery device 10, including a housing 11, an attachment member 13, and an isolation member 14. A battery cell 20 is housed in the housing 11. The battery cell 20 includes a first wall 210, which is disposed opposite to the bottom wall 1121 of the housing 11. The first wall 210 is provided with a pressure relief mechanism. The attachment member 13 is provided with a first through hole 131, which corresponds to the pressure relief mechanism. The surface of the attachment member 13 facing the first wall 210 is attached to the first wall 210. The isolation member 14 includes a clearance portion 141 and a connecting portion 142. The clearance portion 141 is disposed within the first through hole 131 and is spaced apart from the pressure relief mechanism. The connecting portion 142 connects the clearance portion 141 and the attachment member 13. The clearance portion 141 is provided with a second through hole 143.

[0075] In this embodiment, the first direction is the X direction, the second direction is the Y direction, and the thickness direction of the first wall 210 is the Z direction for illustration, but this embodiment is not limited thereto.

[0076] The first wall 210 can be any wall of the battery cell 20. For example, the first wall 210 includes, but is not limited to, the following: the first wall 210 can be the wall with the smallest area of ​​the battery cell 20; the first wall 210 can also be the wall with the largest area of ​​the battery cell 20; the first wall 210 can be the wall of the battery cell 20 on which electrode terminals are provided; the first wall 210 can be the wall adjacent to the wall of the battery cell 20 on which electrode terminals are provided; the first wall 210 can be the wall opposite to the wall of the battery cell 20 on which electrode terminals are provided.

[0077] The attachment component 13 may be attached only to the first wall 210, or it may be connected to the housing 11 of the battery device 10 to enhance the structural strength of the attachment component 13. This application embodiment does not limit this.

[0078] For example, the attachment part 13 may be bonded to the first wall 210, and the adhesive used to bond the attachment part 13 to the first wall 210 includes, but is not limited to, polyurethane adhesive, acrylic adhesive, and silicone rubber adhesive.

[0079] The attachment component 13 can be made of a material with a certain structural strength and the ability to withstand a certain high temperature.

[0080] The fact that the first through hole 131 of the attachment component 13 is directly opposite the pressure relief mechanism can be understood as the first through hole 131 and the pressure relief mechanism having at least a partial overlap area along the thickness direction of the attachment component 13, so that when the pressure relief mechanism is actuated, the contents of the battery cell 20 can be discharged through the first through hole 131.

[0081] The attachment component 13 is attached to the first wall 210, and the attachment component 13 is disposed between the bottom wall 1121 of the housing 11 and the first wall 210 to separate the electrical cavity and the gas collection cavity of the battery device 10. The first through hole 131 opposite the pressure relief mechanism allows the contents of the battery cell 20 to be discharged into the gas collection cavity through the first through hole 131.

[0082] The shape of the first through hole 131 can be circular, elliptical, square or other shapes, and this application embodiment does not limit this.

[0083] When applying adhesive, it is possible that excessive adhesive may be applied to a certain area, or that the adhesive surface may be tilted, causing some adhesive to flow into the area related to the actuation of the pressure relief mechanism. In this case, if the inflowing adhesive is not cleaned up, the cured adhesive may adversely affect the actuation of the pressure relief mechanism, or even block or partially block the channel or opening for the discharge of the exhaust material when the pressure relief mechanism is actuated, thus affecting the release of the exhaust material.

[0084] In this embodiment, the isolation component 14 has a clearance portion 141 that is spaced apart from the pressure relief mechanism. When the attachment component 13 is attached to the first wall 210, the possibility of the adhesive bonding the pressure relief mechanism can be reduced.

[0085] In some embodiments, the isolation component 14 is configured to destroy emissions from the battery cell 20 when actuated by the pressure relief mechanism.

[0086] Therefore, in the event of thermal runaway of the battery cell 20, the isolation component 14 can be destroyed by the discharge material flowing out with the actuation of the pressure relief mechanism, thereby forming a channel for the discharge material to flow out, which can improve the reliability of the battery.

[0087] However, during the use of the battery device 10, the battery cells 20 in the battery device 10 may leak due to impact or aging. The leaked electrolyte is prone to accumulate at the isolation component 14, which affects the overall insulation performance of the battery device 10.

[0088] In this embodiment of the application, by providing a second through hole 143 in the clearance portion 141 of the isolation component 14, the leaked electrolyte can flow from the second through hole 143 into the gas collection chamber on the other side of the attachment component 13, thereby reducing the accumulation of electrolyte at the bottom of the battery device 10 in the event of leakage of the battery cell 20.

[0089] In the technical solution provided in this application embodiment, the electrical cavity and gas collection cavity of the battery device 10 are separated by the attachment component 13, and the emissions during the thermal runaway process of the battery cell 20 are discharged through the first through hole 131, which can reduce the possibility of thermal runaway propagation in the event of thermal runaway of the battery cell 20. The avoidance portion 141 of the isolation component 14 can reduce the impact of the adhesive on the pressure relief mechanism when the attachment component 13 is attached to the first wall 210. Furthermore, the avoidance portion 141 is provided with a second through hole 143, which allows the leaked electrolyte to flow out in the event of leakage from the battery cell 20, thereby reducing the accumulation of electrolyte at the bottom of the battery device 10 and improving the reliability of the battery device 10.

[0090] In some possible embodiments, the portion of the clearance portion 141 near the second through hole 143 is further away from the pressure relief mechanism than the portion of the clearance portion 141 away from the second through hole 143.

[0091] The portion of the clearance portion 141 near the second through hole 143 is further away from the pressure relief mechanism than the portion of the clearance portion 141 away from the second through hole 143, which makes it easier for electrolyte leaking from the battery cell 20 to be collected at the second through hole 143.

[0092] For example, the portion of the clearance 141 near the second through hole 143 that is further away from the pressure relief mechanism than the portion of the clearance 141 that is further away from the second through hole 143 can be funnel-shaped, with the second through hole 143 at the bottom of the funnel. This allows the leaked electrolyte to flow along the clearance 141 to the second through hole 143 in the event of leakage from the battery cell 20, thus quickly draining the leaked electrolyte from the electrical cavity. Alternatively, the portion of the clearance 141 near the second through hole 143 that is further away from the pressure relief mechanism can also be a smooth parabolic surface, making it easier for the leaked electrolyte to concentrate at the second through hole 143. The above examples are merely illustrative, and the embodiments of this application are not limited thereto.

[0093] In the technical solution provided in this application embodiment, the portion of the avoidance part 141 near the second through hole 143 is further away from the pressure relief mechanism than the portion of the avoidance part 141 away from the second through hole 143. The electrolyte leaked from the battery cell 20 can collect along the avoidance part 141 towards the second through hole 143, which can further reduce the accumulation of electrolyte at the bottom of the battery device 10, thereby improving the reliability of the battery device 10.

[0094] In some possible embodiments, the second through hole 143 is connected to the connecting portion 142 by a bevel or curved surface.

[0095] The second through hole 143 is connected to the connecting part 142 via an inclined or curved surface. In the event of leakage from the battery cell 20, the electrolyte can flow into the second through hole 143 along the smooth surface, thereby reducing the possibility that the electrolyte will be blocked and unable to flow into the second through hole 143, and thus reducing electrolyte accumulation at the bottom of the battery device 10. As a result, the reliability of the battery device 10 can be improved.

[0096] Combination Figures 8 to 9 This application describes another possible isolation component 14 of the battery device 10 provided in one embodiment.

[0097] Figure 8 This paper shows a schematic diagram of another possible isolation component 14 of the battery device 10 provided in one embodiment of the present application; Figure 9 This application shows Figure 8 An enlarged schematic diagram of part B of the central isolation component 14.

[0098] In some possible embodiments, the second through hole 143 is connected to the connecting portion 142 by a stepped structure 1411.

[0099] The second through hole 143 and the connecting part 142 can be connected by a single-step structure 1411, or by a multi-step structure 1411. This application embodiment does not limit this connection.

[0100] For example, in the figure, the second through hole 143 and the connecting part 142 are connected by a multi-step structure 1411.

[0101] The second through hole 143 is connected to the connecting part 142 by a stepped structure 1411. In the event of leakage of electrolyte in the battery cell 20, the leaked electrolyte can slide down along the stepped structure 1411. Even if the second through hole 143 is blocked, the stepped structure 1411 can isolate the electrolyte that accumulates near the second through hole 143, thereby reducing the impact of the electrolyte that accumulates near the second through hole 143 on the electrical cavity. As a result, the reliability of the battery device 10 can be improved.

[0102] Figure 10 A schematic diagram of another possible isolation component 14 of the battery device 10 provided in one embodiment of this application is shown.

[0103] In some possible embodiments, the clearance portion 141 is provided with a plurality of second through holes 143, the plurality of second through holes 143 being disposed in the portion of the clearance portion 141 near the inner wall of the first through hole 131.

[0104] The clearance portion 141 is provided with a plurality of second through holes 143, and the plurality of second through holes 143 are provided in the portion of the clearance portion 141 near the inner wall of the first through hole 131, thereby forming a break hole at the edge of the clearance portion 141. Leaked electrolyte is discharged through the plurality of second through holes 143. The size of each second through hole 143 can be small, and the second through holes 143 are provided in the portion of the clearance portion 141 near the inner wall of the first through hole 131, so that when other first through holes 131 release pressure, the airflow through the first through hole 131 is smaller, thereby reducing the impact force of the airflow on the pressure relief mechanism of the battery cell 20 corresponding to the first through hole 131 when other battery cells 20 thermally runaway occurs.

[0105] In the technical solution provided in this application embodiment, a plurality of second through holes 143 are disposed on the portion of the avoidance part 141 near the inner wall of the first through hole 131, which can reduce the impact force of the airflow generated by the battery cell 20 in the event of thermal runaway on the pressure relief mechanism of other battery cells 20, thereby reducing the possibility of the pressure relief mechanism opening due to the impact of high pressure airflow on the pressure relief mechanism, thereby improving the reliability of the battery device 10.

[0106] Combination Figures 11 to 12 This application describes a battery device 10 provided in another embodiment.

[0107] Figure 11 A partial cross-sectional schematic diagram of a battery device 10 provided in another embodiment of this application is shown; Figure 12 A schematic diagram of the bottom portion of a battery device 10 provided in another embodiment of this application is shown.

[0108] In some possible embodiments, the battery device 10 further includes a protective component 16 disposed on the side of the clearance portion 141 away from the pressure relief mechanism.

[0109] When a single battery cell 20 experiences thermal runaway, the contents discharged into the gas collection chamber may rebound and enter the electrical cavity through the adjacent first through-hole 131, causing the thermal runaway to spread. By placing the protective component 16 on the side of the attachment component 13 facing away from the first wall 210, the protective component 16 can protect the attachment component 13, reducing the possibility of damage to the surface of the attachment component 13 facing away from the first wall 210 under conditions such as vibration, impact, and high temperature, thereby improving the performance of the battery.

[0110] In some implementations, the material of the protective component 16 includes at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. Thus, in this embodiment, by setting the material of the protective component 16 to at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulation performance, heat resistance, and chemical stability of the protective component 16 can be improved. This effectively reduces the possibility of damage to the surface of the attachment component 13 facing away from the first wall 210 under vibration, impact, high temperature, etc., thereby improving the performance of the battery.

[0111] The protective component 16 may cover multiple first through holes 131, or the protective component 16 may cover each of the first through holes 131 individually. This embodiment of the application illustrates the protective component 16 covering multiple first through holes 131, but this embodiment of the application is not limited thereto.

[0112] The protective components 16 can be respectively disposed in the first through holes 131, or the protective components 16 can cover multiple first through holes 131. When the protective components 16 cover multiple first through holes 131, the protective components 16 can be processed as a whole, thereby improving production efficiency and facilitating assembly.

[0113] In the technical solution provided in this application embodiment, by providing a protective component 16 on the side of the avoidance part 141 away from the pressure relief mechanism, when the battery cell 20 experiences thermal runaway, the contents discharged into the gas collection chamber through the first through hole 131 and rebounding can be blocked by the protective component 16, thereby reducing the possibility of the isolation component 14 being damaged, and thus improving the reliability of the battery device 10.

[0114] In some possible embodiments, the protective component 16 is provided with a third through hole 161, which is correspondingly provided with the clearance portion 141.

[0115] In the event of leakage in the battery cell 20, the leaked electrolyte flows out of the electrical cavity through the second through hole 143 provided in the clearance part 141. At this time, the protective component 16 is provided on the side of the clearance part 141 away from the pressure relief mechanism, and the protective component 16 may have a certain impact on the flow of electrolyte.

[0116] By providing a third through hole 161 in the protective component 16, the electrolyte flowing out from the second through hole 143 can further flow into the gas collecting chamber through the third through hole 161.

[0117] In the technical solution provided in this application embodiment, the protective component 16 is provided with a third through hole 161. In the event of leakage of the battery cell 20, the leaked electrolyte can flow out through the second through hole 143 provided in the avoidance part 141 and then continue to flow into the gas collection chamber through the third through hole 161 provided in the protective component 16. This can reduce the accumulation of electrolyte at the bottom of the battery device 10 and thus improve the reliability of the battery device 10.

[0118] In some possible embodiments, the third through hole 161 is offset from the second through hole 143 along the thickness direction of the protective member 16.

[0119] The fact that the third through hole 161 and the second through hole 143 are offset along the thickness direction of the protective component 16 can be understood as the fact that the orthographic projections of the third through hole 161 and the second through hole 143 along the thickness direction of the protective component 16 do not completely overlap.

[0120] When the battery cell 20 experiences thermal runaway, the contents discharged into the gas collection chamber may rebound. The third through hole 161 and the second through hole 143 are offset along the thickness direction of the protective component 16, which can block the rebounding sparks or discharges, thereby ensuring that the pressure relief mechanism located on the other side of the attachment component 13 is not affected by the rebounding discharges.

[0121] Meanwhile, the fact that the third through hole 161 and the second through hole 143 are offset along the thickness direction of the protective component 16 will not affect the normal exhaust of the pressure relief mechanism, and the gas can still be discharged into the gas collection chamber through the third through hole 161 and the second through hole 143.

[0122] In the technical solution provided in this application embodiment, the third through hole 161 and the second through hole 143 are offset along the thickness direction of the protective component 16, thereby reducing the possibility that when the battery cell 20 experiences thermal runaway, the emissions discharged into the gas collection chamber will directly rebound to the pressure relief mechanism of the adjacent battery cell 20, thereby improving the reliability of the battery device 10.

[0123] In some possible embodiments, the protective component 16 is provided with a plurality of the third through holes 161, the plurality of the third through holes 161 being disposed on the portion of the protective component 16 near the inner wall of the first through hole 131.

[0124] The protective component 16 is provided with a plurality of third through holes 161, and the plurality of third through holes 161 are provided on the portion of the protective component 16 near the inner wall of the first through hole 131, thereby forming a break hole at the edge of the protective component 16. Leaked electrolyte is discharged through the plurality of third through holes 161. The size of each third hole can be small, and the third through hole 161 is provided on the portion of the protective component 16 near the inner wall of the first through hole 131, so that when other first through holes 131 release pressure, the airflow through the first through hole 131 is smaller, thereby reducing the impact force of the airflow on the pressure relief mechanism of the battery cell 20 corresponding to the first through hole 131 in the event of thermal runaway of other battery cells 20.

[0125] Furthermore, since the third through hole 161 and the second through hole 143 are offset along the thickness direction of the protective component 16, the airflow passes through the attachment component 13 and is blocked, which can reduce the impact on the pressure relief mechanism.

[0126] In the technical solution provided in this application embodiment, the third through hole 161 and the second through hole 143 are staggered along the thickness direction of the protective member 16, and a plurality of the third through holes 161 are disposed on the portion of the protective member 16 near the inner wall of the first through hole 131. On the one hand, airflow from the side of the attachment member 13 near the first wall 210 can flow through the second through hole 143 and the third through hole 161, thereby meeting the airflow requirements. On the other hand, this arrangement can reduce the impact of high-pressure airflow on the pressure relief mechanism of adjacent battery cells 20 when thermal runaway occurs in the battery cell 20, thereby improving the reliability of the battery device 10.

[0127] In some possible embodiments, the battery device 10 further includes a support member 15 disposed between the attachment member 13 and the bottom wall 1121 of the housing 11 to support the attachment member 13.

[0128] Since the attachment member 13 is located between the bottom wall 1121 of the housing 11 and the first wall 210 of the battery cell 20, the attachment member 13 bears the weight of the battery cell 20. When subjected to impact and vibration, the attachment member 13 may undergo significant deformation, which may affect the components inside the battery device 10. By providing the support member 15, the attachment member 13 can be supported, reducing the deformation of the attachment member 13, thereby reducing the impact of external impact and vibration on the internal components of the battery device 10.

[0129] The support component 15 can be continuously arranged or segmented. For example, the supporting component 15 is segmented in the accompanying drawings, but the embodiments of this application are not limited thereto.

[0130] The support component 15 can be made of a material with a certain degree of rigidity and cushioning effect, such as rigid foam, silicone foam, polyester fiber, glass fiber, or a mixture of materials.

[0131] In the technical solution provided in this application embodiment, by providing a support member 15 between the bottom wall 1121 of the housing 11 and the attachment member 13, the impact of external impact and vibration on the internal components of the battery device 10 can be reduced when the battery device 10 is subjected to impact and vibration, thereby improving the reliability of the battery device 10.

[0132] In some possible embodiments, at least a portion of the surface of the support member 15 facing the attachment member 13 presses against at least a portion of the surface of the protective member 16 away from the first wall 210.

[0133] When a battery cell 20 experiences thermal runaway, the internal pressure of the battery cell 20 is relatively high. Therefore, the adhesion force of the protective component 16 may be insufficient to resist the pressure difference and be blown away by the airflow. This results in a reduction or loss of the protective effect of adjacent protective components 16, which may lead to the spread of thermal runaway.

[0134] At least a portion of the surface of the support member 15 facing the attachment member 13 presses against the surface of the protective member 16 away from the first wall 210. The support member 15 can simultaneously provide support for the protective member 16 and prevent the protective member 16 from being blown away by the airflow when the protective member 16 is impacted by the airflow.

[0135] In the technical solution provided in this application embodiment, at least a portion of the surface of the support member 15 facing the attachment member 13 presses against the surface of the protective member 16 away from the first wall 210. The side of the protective member 16 away from the first wall 210 can be supported by the support member 15, thereby reducing the possibility of the protective member 16 falling off, thereby improving the protective effect of the protective member 16, and thus improving the reliability of the battery device 10.

[0136] In some possible embodiments, the battery device 10 includes a plurality of support members 15 arranged along a first direction on both sides of a plurality of first through holes 131.

[0137] The support components 15 are arranged in segments on both sides of the first through hole 131. Compared with the continuously arranged support components 15, the segmented support components 15 can also allow airflow, thereby providing more space for gas flow and making the exhaust smoother in the event of thermal runaway of the battery cell 20.

[0138] In the technical solution provided in this application embodiment, the battery device 10 includes a plurality of support members 15. The plurality of support members 15 are arranged along a first direction on both sides of a plurality of first through holes 131, thereby leaving gaps between the support members 15 for airflow, which can improve the airflow efficiency, allow the airflow to be discharged in time, and reduce the possibility of thermal runaway diffusion. Thus, the reliability of the battery device 10 can be improved.

[0139] Figure 13 Another possible bottom schematic diagram of the battery device 10 provided in another embodiment of this application is shown.

[0140] In some possible embodiments, a plurality of support members 15 are provided on both sides of the first through hole 131 along the first direction, the first direction being parallel to the first wall 210; wherein, at least two support members 15 located on both sides of the first through hole 131 along the first direction are staggered in the second direction, the second direction being perpendicular to the first direction and parallel to the first wall 210.

[0141] The fact that at least two support members 15 located on either side of the first through hole 131 are staggered in the second direction can be understood as the orthographic projections of at least two support members 15 in the second direction not overlapping at least partially.

[0142] The supporting components 15 on both sides of the first through hole 131 are staggered in the second direction, so that the first through hole 131 can vent smoothly in both the second and first directions. At the same time, the staggered arrangement of the supporting components 15 can block large particles discharged through the first through hole 131, thereby increasing the venting smoothness of the battery cell 20 during thermal runaway while reducing the accumulation of large particles at the flue gas outlet to ignite the flue gas.

[0143] In the technical solution provided in this application embodiment, at least two support members 15 located on both sides of the first through hole 131 are staggered in the second direction, so that the airflow discharged from the first through hole 131 can flow smoothly. At the same time, it can block large particles and reduce the accumulation of particles, thereby improving the reliability of the battery device 10.

[0144] Combination Figures 14 to 17 This application also describes a battery device 10 provided in another embodiment.

[0145] Figure 14 A schematic diagram of the bottom portion of a battery device 10 according to another embodiment of this application is shown; Figure 15 This application shows Figure 14 An enlarged schematic diagram of part C of the battery device 10 provided in the diagram; Figure 16 A side cross-sectional view of a battery device 10 provided in another embodiment of this application is shown; Figure 17 This application shows Figure 16 An enlarged view of part D of the battery device 10.

[0146] In some possible embodiments, the first region of the attachment member 13 is bonded to the first wall 210 by an adhesive. The first region is provided with a second through hole 143. The surface of the support member 15 facing the attachment member 13 is provided with a first groove 152. The opening of the first groove 152 is arranged opposite to the fourth through hole 132 so that a portion of the adhesive can enter the first groove 152 through the fourth through hole 132.

[0147] The first area may be the area where the attached component 13 is not directly opposite the pressure relief mechanism. The first area is bonded to the first wall 210 with adhesive, which may overflow when squeezed, thus affecting the function of other nearby components.

[0148] The first region of the attachment component 13 is provided with a fourth through hole 132, through which adhesive can overflow. This can improve the uniformity of adhesive distribution in the first region and reduce the impact of overflowing adhesive on other nearby components.

[0149] After the adhesive overflows from the fourth through hole 132, it may bond the attached part 13 to the bottom wall 1121 of the housing 11. After the adhesive hardens, on the one hand, it may affect the exhaust performance of the gas collection chamber of the battery device 10, and on the other hand, it may cause the local stress of the battery device 10 to be too high when it is subjected to impact.

[0150] The support member 15 has a first groove 152 on the side facing the attachment member 13, and the opening of the first groove 152 is directly opposite the fourth through hole 132, so that the adhesive overflowing through the fourth through hole 132 can be contained in the first groove 152, thereby reducing the impact of the adhesive on the attachment member 13 and the bottom wall 1121 of the housing 11.

[0151] In the technical solution provided in this application embodiment, the first region of the attachment component 13 is provided with a fourth through hole 132, so that the adhesive can overflow from the fourth through hole 132 to reduce the impact of the overflow adhesive on other components in the battery device 10. The support component 15 is provided with a first groove 152 to receive the adhesive overflowing from the fourth through hole 132, thereby reducing the impact of the adhesive overflow on the exhaust performance of the gas collecting chamber. At the same time, it can also improve the uniformity of the force on the attachment component 13, thereby improving the reliability of the battery device 10.

[0152] In some possible embodiments, the battery device 10 further includes a reinforcing rib 171 that protrudes from the surface of the attachment member 13 away from the first wall 210 and / or the surface of the bottom wall 1121 of the housing 11 facing the first wall 210, and the support member 15 presses against it for at least partial reinforcement.

[0153] The battery device 10 is provided with reinforcing ribs 171, which locally increases the thickness of the attached component 13. When subjected to impact, the stress can be distributed to the entire reinforcing rib 171, thereby enhancing the overall strength of the attached component 13.

[0154] In the technical solution provided in this application embodiment, the reinforcement rib 171 increases the local thickness of the attachment member 13, thereby enhancing the structural strength of the attachment member 13. Furthermore, the support member 15 presses against at least part of the reinforcement rib 171, thereby increasing the local pressure on the support member 15 and thus providing better support, reducing the impact of bottom impacts and vibrations on the internal components of the battery device 10. This improves the reliability of the battery device 10.

[0155] In some possible embodiments, the support member 15 has a second groove 151 on the side surface facing the reinforcing rib 171, the second groove 151 accommodating at least a portion of the reinforcing rib 171.

[0156] The number of second grooves 151 can be one or more, and the embodiments of this application are not limited thereto. The figure illustrates that the number of second grooves 151 is 3, but the embodiments of this application are not limited thereto.

[0157] The size of the second groove 151 can match the cross-sectional dimensions of the reinforcing rib 171. For example, in the figure, the size of the second groove 151 on the left is close to the cross-sectional dimensions of the reinforcing rib 171. The second groove 151 can also be larger than the cross-sectional dimensions of the reinforcing rib 171. For example, the size of the second groove 151 on the right in the figure is larger than the dimensions of the interface of the reinforcing rib 171, thus accommodating the reinforcing rib 171.

[0158] In the technical solution provided in this application embodiment, a second groove 151 is provided on the surface of the support member 15 facing the reinforcing rib 171, and at least a portion of the reinforcing rib 171 is accommodated through the second groove 151. On the one hand, when subjected to impact, the reinforcing rib 171 can abut against the support member 15, thereby providing better support and cushioning for the attached member 13. On the other hand, the reinforcing rib 171 being located within the second groove 151 can constrain the sliding of the support member 15, thereby improving the stability of the support member 15 and thus improving the reliability of the battery device 10.

[0159] According to some embodiments of this application, this application also provides an electrical device including the battery device 10 described in any of the above embodiments, and the battery device 10 is used to provide electrical energy to the electrical device.

[0160] The power supply device can be any of the aforementioned devices or systems that utilize battery device 10.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box (11); A battery cell (20) is housed in the housing (11). The battery cell (20) includes a first wall (210), which is disposed opposite to the bottom wall (1121) of the housing (11). The first wall (210) is provided with a pressure relief mechanism. The attachment component (13) is provided with a first through hole (131), the first through hole (131) is correspondingly provided with the pressure relief mechanism, and the surface of the attachment component (13) facing the first wall (210) is attached to the first wall (210). The isolation component (14) includes a clearance part (141) and a connecting part (142). The clearance part (141) is disposed in the first through hole (131) and the clearance part (141) is spaced apart from the pressure relief mechanism. The connecting part (142) connects the clearance part (141) and the attachment part (13). The avoidance part (141) is provided with a second through hole (143).

2. The battery device according to claim 1, characterized in that, The portion of the clearance part (141) closer to the second through hole (143) is further away from the pressure relief mechanism than the portion of the clearance part (141) further away from the second through hole (143).

3. The battery device according to claim 1 or 2, characterized in that, The second through hole (143) is connected to the connecting part (142) by a slope or a curved surface.

4. The battery device according to claim 1 or 2, characterized in that, The second through hole (143) is connected to the connecting part (142) by a stepped structure (1411).

5. The battery device according to claim 1, characterized in that, The clearance portion (141) is provided with a plurality of second through holes (143), which are located on the portion of the clearance portion (141) near the inner wall of the first through hole (131).

6. The battery device according to claim 1, characterized in that, The battery device also includes: A protective component (16) is disposed on the side of the clearance portion (141) away from the pressure relief mechanism.

7. The battery device according to claim 6, characterized in that, The protective component (16) is provided with a third through hole (161), which is provided in correspondence with the avoidance part (141).

8. The battery device according to claim 7, characterized in that, The third through hole (161) is offset from the second through hole (143) along the thickness direction of the protective component (16).

9. The battery device according to claim 7, characterized in that, The protective component (16) is provided with a plurality of the third through holes (161), which are located on the part of the protective component (16) near the inner wall of the first through hole (131).

10. The battery device according to any one of claims 6 to 9, characterized in that, The battery device also includes: A support member (15) is disposed between the attachment member (13) and the bottom wall (1121) of the housing (11) to support the attachment member (13).

11. The battery device according to claim 10, characterized in that, At least a portion of the surface of the support member (15) facing the attachment member (13) presses against at least a portion of the surface of the protective member (16) away from the first wall (210).

12. The battery device according to claim 10, characterized in that, The first through hole (131) is provided with a plurality of the aforementioned support members (15) on both sides along the first direction, the first direction being parallel to the first wall (210). Among them, at least two of the support members (15) located on both sides of the first through hole (131) along the first direction are staggered in the second direction, which is perpendicular to the first direction and parallel to the first wall (210).

13. The battery device according to claim 10, characterized in that, The first region of the attachment member (13) is bonded to the first wall (210) with an adhesive. The first region is provided with a fourth through hole (132). The surface of the support member (15) facing the attachment member (13) is provided with a first groove (152). The opening of the first groove (152) is arranged opposite to the fourth through hole (132) so that a portion of the adhesive can enter the first groove (152) through the fourth through hole (132).

14. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 13, wherein the battery device is used to supply power to the electrical device.

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