Battery device and electric device

Abstract

The application provides a battery device and an electric device. The battery device comprises a box body and a battery monomer assembly. The box body comprises a first box body and a second box body. The first box body cooperates with the second box body along a first direction to jointly form a containing cavity. Part of the surface of the first box body forms a first sealing surface. The first sealing surface is sealingly attached to the second box body. The normal direction of the first sealing surface intersects the first direction. The battery monomer assembly is accommodated in the containing cavity. In the application, the normal direction of at least part of the first sealing surface intersects the first direction. In the case that a pressure wave is generated in the containing cavity, the force acting on the first sealing surface along the normal direction of the first sealing surface is reduced. The adverse effect of the sealing failure of the first sealing surface on the sealing effect of the containing cavity is reduced. The service life of the battery device is improved.

Description

Technical Field

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

[0002] Currently, battery devices typically include a housing and battery cell assemblies housed within the housing. Each battery cell assembly includes at least one battery cell. The housing needs to be sealed to prevent moisture or foreign objects from entering and affecting the normal operation of the battery cell assembly. Summary of the Invention

[0003] The inventors of this application have discovered that an electric arc may be generated inside the battery device due to insulation failure. The electric arc can heat the air in the surrounding space in a short time, causing the local air to expand rapidly due to the heat, thereby forming a pressure wave. The pressure wave spreads inside the battery device and impacts the battery device's casing, which may have an adverse effect on the casing's sealing.

[0004] In view of this, the embodiments of this application aim to provide a battery device and an electrical device that are beneficial to improving sealing performance.

[0005] To achieve this objective, the technical solution of this application embodiment is implemented as follows:

[0006] This application provides a battery device, including:

[0007] The enclosure includes a first enclosure and a second enclosure. The first enclosure is fitted with the second enclosure along a first direction so that the two enclosures together form a receiving cavity. A portion of the surface of the first enclosure forms a first sealing surface. The first sealing surface is sealed and fitted to the second enclosure. The normal direction of the first sealing surface intersects with the first direction.

[0008] A battery cell assembly includes at least one battery cell, and the battery cell assembly is housed within a receiving cavity.

[0009] The battery device in this application embodiment, by making at least a portion of the normal direction of the first sealing surface intersect with the first direction, helps to reduce the force on the first sealing surface along the normal direction of the first sealing surface when a pressure wave is generated in the receiving cavity, thereby reducing the adverse effect of the sealing failure of the first sealing surface on the sealing effect of the receiving cavity, and thus helping to improve the service life of the battery device.

[0010] In some embodiments, at least a portion of the first sealing surface is located on the side of the receiving cavity perpendicular to the first direction. This helps to reduce the outer contour dimensions of the battery device along the first direction, making the battery device structure more compact and improving its adaptability.

[0011] In some embodiments, the angle between the normal direction of at least a portion of the first sealing surface and the first direction ranges from 30° to 90°. Within this angle range, it is advantageous to further reduce the force exerted by the first sealing surface along its normal direction in the event of pressure waves generated within the cavity, thereby reducing the adverse effects of sealing failure of the first sealing surface on the sealing performance of the cavity, and thus improving the service life of the battery device.

[0012] In some embodiments, the normal direction of the first sealing surface is perpendicular to the first direction. The first sealing surface includes a first planar portion, a second planar portion, and an arcuate portion. The first planar portion extends along a second direction, the second planar portion extends along a third direction, and the arcuate portion smoothly connects the first planar portion and the second planar portion. The radius of the arcuate portion is greater than 10 mm, and the first direction, the second direction, and the third direction are perpendicular to each other. This helps to reduce stress concentration on the first sealing surface caused by the pressure wave, thus reducing the risk of sealing failure of the first sealing surface.

[0013] In some embodiments, the smaller of the length of the first planar portion along the second direction and the length of the second planar portion along the third direction is defined as a first dimension, and the radius of the arc portion does not exceed one-quarter of the first dimension. Thus, the arc portion helps reduce the probability of damage due to stress concentration at the connection point between the first and second planar portions in the event of torsional deformation of the housing.

[0014] In some embodiments, the first housing includes a housing body and a first sealing element, which is sandwiched between the housing body and the second housing. The surface of the first sealing element that contacts the second housing forms a first sealing surface, and the first sealing element is capable of elastic deformation. Thus, in the event of relative movement between the housing body and the second housing along a first direction, the first sealing element can act as a buffer by undergoing elastic deformation, reducing the risk of damage to the housing body and the second housing due to collision. The elastic deformation of the first sealing element also helps maintain its contact with the second housing, thereby ensuring a stable sealing effect.

[0015] In some embodiments, the surface of the first seal that adheres to the housing body forms a second sealing surface, and at least a portion of the normal direction of the second sealing surface intersects the first direction. This helps to reduce the force along the first direction on the second sealing surface in the event of pressure waves generated within the cavity, thereby reducing the adverse effects of sealing failure of the second sealing surface on the sealing performance of the cavity and improving the lifespan of the battery device.

[0016] In some embodiments, the box body includes a body portion and a flange portion. The body portion covers the second box body, and the flange portion is arranged around the peripheral edge of the body portion and extends along a first direction. At least a portion of the first sealing member is sandwiched between the flange portion and the second box body. The first sealing member is attached to the second box body to form a first sealing surface, and the first sealing member contacts the flange portion to form a second sealing surface. In this way, the normal direction of the first sealing surface is perpendicular to the first direction, which helps to reduce the risk of separation between the box body and the first sealing member, and between the first sealing member and the second box body along the first direction. The flange portion and the second box body can achieve mutual constraint in the direction perpendicular to the first direction, and play a role in constraining and positioning the first sealing member.

[0017] In some embodiments, the housing further includes a first fastener, a flange and a first seal forming a first through hole, and a second housing having a first blind hole. The first fastener passes through the first through hole and the first blind hole, and the inner wall of at least one of the first through hole and the first blind hole is sealed to the first fastener. This facilitates the fastening of the first and second housings after they are closed, improving the convenience of assembly operations.

[0018] In some embodiments, the battery device further includes a mounting post and a second fastener. The mounting post is located within the receiving cavity. The housing has a second through hole extending along a first direction, communicating with the receiving cavity. At least a portion of the second fastener is located outside the housing and connected to the mounting post through the second through hole. A portion of the housing is sandwiched between a portion of the second fastener and the mounting post. A portion of the surface of the second fastener serves as a third sealing surface, located outside the housing and sealingly fitted to it. The normal direction of at least a portion of the third sealing surface intersects the first direction. This helps to further reduce the force along the normal direction of the third sealing surface when pressure waves are generated within the receiving cavity, thereby reducing the adverse effects of sealing failure of the third sealing surface on the sealing effect of the receiving cavity and improving the service life of the battery device.

[0019] In some embodiments, the angle between the normal direction of at least a portion of the third sealing surface and the first direction ranges from 30° to 60°. This helps to further reduce the force along the normal direction of the third sealing surface when pressure waves are generated within the cavity, thereby reducing the adverse effects of sealing failure of the third sealing surface on the sealing effect of the cavity and improving the service life of the battery device.

[0020] In some embodiments, a portion of the first housing is recessed towards the second housing along a first direction to form a mounting portion. A second through hole is located in the mounting portion. At least a portion of the mounting portion is in contact with a third sealing surface. A portion of a second fastener passes through the second through hole and is securely connected to a mounting post. The battery device also includes a second seal capable of elastic deformation. The second seal is circumferentially disposed around the second fastener and at least partially sandwiched between the mounting portion and the mounting post. This secures the second seal, reducing the probability of foreign objects entering the cavity through the second through hole, thus improving the battery device's lifespan.

[0021] In some embodiments, one of the walls of the receiving cavity and the mounting post is provided with a sealing protrusion, and the other is provided with a sealing groove. A portion of the second seal abuts against the sealing protrusion and is embedded in the sealing groove. This helps to further improve the sealing effect on the receiving cavity.

[0022] In some embodiments, the receiving cavity has a plurality of recessed first wave-damping grooves on at least one side wall along the first direction. One side of the first wave-damping groove is open and communicates with the receiving cavity, and the first wave-damping groove gradually narrows away from its open position. In this way, the energy of the pressure wave is weakened by the first wave-damping groove, which helps to reduce the energy of the pressure wave transmitted to the enclosure, thereby reducing the deformation and vibration of the enclosure under the action of the pressure wave, and thus reducing the adverse effects on the sealing effect of the enclosure.

[0023] In some embodiments, the battery device includes a buffer, a battery cell assembly connected to a second housing, a first housing with its wall facing the receiving cavity along a first direction as a first surface, and the buffer connected to the first surface. The buffer is made of a porous material. In this way, the energy of the pressure wave is dissipated by the buffer, reducing the energy of the pressure wave acting on the housing, thereby reducing the deformation and vibration of the housing under the action of the pressure wave, and thus reducing the adverse effects on the sealing effect of the housing.

[0024] In some embodiments, the buffer member has multiple second wave-damping grooves on the side opposite to the first surface, with one side of each second wave-damping groove open and communicating with the receiving cavity. In this way, the energy of the pressure wave is weakened by the second wave-damping grooves, further reducing the energy of the pressure wave transmitted to the enclosure, thereby reducing the deformation and vibration of the enclosure under the action of the pressure wave, and thus reducing the adverse effects on the enclosure's sealing performance.

[0025] This application also provides an electrical device, characterized in that the electrical device includes any of the battery devices described in the foregoing embodiments.

[0026] This helps improve the operational stability of electrical devices during battery use and extends their service life. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of the present application where the electrical device is a vehicle;

[0028] Figure 2 This is an exploded schematic diagram of a battery device in one embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the box body in one embodiment of this application;

[0030] Figure 4 for Figure 3 A cross-sectional diagram of position AA in the middle;

[0031] Figure 5 for Figure 4 A partially enlarged schematic diagram of position C, where the dashed line is the straight line of the first direction, the center line associated with angle a is the normal direction of the first sealing surface, and the center line associated with angle b is the normal direction of the second sealing surface;

[0032] Figure 6 for Figure 4 A cross-sectional view of the EE position;

[0033] Figure 7 for Figure 4 A partially enlarged schematic diagram of position D, where the dashed line is the straight line of the first direction, and the center line associated with the included angle c is the normal direction of the third sealing surface;

[0034] Figure 8 for Figure 3 A cross-sectional view of the BB position in the middle;

[0035] Figure 9 for Figure 8 A magnified view of the middle F position;

[0036] Figure 10 for Figure 8 A diagram from another perspective;

[0037] Figure 11 This is a cross-sectional view of another embodiment of this application, and the cross-section position is... Figure 3 The positions of BB in the text are the same;

[0038] Figure 12 for Figure 11 A magnified view of the area at position G in the middle;

[0039] Figure 13 for Figure 11 A diagram from another perspective.

[0040] Explanation of reference numerals in the attached figures

[0041] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 10a, Receiving Cavity; 10aa, First Surface; 10b, First Sealing Surface; 10ba, Arc-shaped Part; 10bb, First Flat Part; 10bc, Second Flat Part; 10c, First Through Hole; 10ca, First Sub-Through Hole; 10cb, Second Sub-Through Hole; 10d, First Blind Hole; 10e, Third Sealing Surface; 10f, Fourth Sealing Surface; 10g, Fifth Sealing Surface; 10h, First Wave Damping 10i, second through hole; 11, first housing; 11a, second sealing surface; 111, housing body; 1111, body part; 1112, flange part; 112, first sealing element; 113, mounting part; 12, second housing; 12a, cavity; 13, first fastener; 14, sealing protrusion; 20, battery cell assembly; 21, battery cell; 30, mounting post; 30a, sealing groove; 40, second fastener; 50, second sealing element; 60, buffer element; 60a, second wave damping groove. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of this application and should not be regarded as undue limitations on this application.

[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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and drawings of this application are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, 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 application, "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 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 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 the embodiments 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, and 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 application, for ease of explanation, as shown in the accompanying drawings, the direction of arrow X is referred to as the "first direction", the direction of arrow Y as the "second direction", and the direction of arrow Z as the "third direction".

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0050] 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.

[0051] 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.

[0052] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0053] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0054] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0055] In some implementations, the electrode assembly is a stacked structure.

[0056] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0057] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0058] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0059] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0060] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0061] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0062] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0063] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0064] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0065] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0066] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0067] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0068] 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.

[0069] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0070] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. For example... Figure 1 As 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.

[0085] 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.

[0086] The embodiments of this application will now be described in detail.

[0087] In related technologies, when a battery device is under high-voltage charging and discharging, if the insulation components of its internal electrical components, such as individual battery cells or high-voltage distribution boxes, fail due to aging or vibration, an electric arc will be generated between the two points of insulation failure due to a potential difference. This electric arc can rapidly heat the surrounding air. The heated air can quickly expand and push outwards, thus forming a pressure wave inside the battery device that spreads outwards from the location of the arc. This pressure wave impacts the inner walls of the battery device's internal space, causing vibration and deformation of the battery casing. This may lead to the failure of the casing's sealing measures, allowing external moisture and foreign objects to enter the battery device, adversely affecting its normal use and shortening its lifespan. Furthermore, the pressure wave is a longitudinal wave, which can easily cause the entire battery device to vibrate vertically, also negatively impacting its installation stability within the electrical appliance.

[0088] Based on the aforementioned technical problems, this application aims to provide a battery device and an electrical device. The battery device includes a first housing and a second housing that cooperate with each other along a first direction. The portion of the first housing and the second housing that seals against each other forms a first sealing surface, and the normal direction of the first sealing surface intersects the first direction. This reduces the force exerted by pressure waves generated inside the housing on the first sealing surface in the first direction, thus helping to maintain the sealing effect between the first housing and the second housing.

[0089] Specifically, see Figures 2 to 5 This application provides a battery device 100, which includes a housing 10 and a battery cell assembly 20.

[0090] The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 is fitted with the second housing 12 along a first direction so that the two together enclose a receiving cavity 10a. A portion of the surface of the first housing 11 forms a first sealing surface 10b. The first sealing surface 10b is sealed and fitted with the second housing 12. The normal direction of the first sealing surface 10b intersects with the first direction.

[0091] The battery cell assembly 20 includes at least one battery cell 21, and the battery cell assembly 20 is housed within a receiving cavity 10a. The housing 10 provides protection for the battery cell assembly 20 and other devices installed inside the battery device 100.

[0092] The receiving cavity 10a can be used to install other devices of the battery device 100, such as temperature sensors, voltage sensors, high-voltage distribution boxes, battery management units (BMUs), etc.

[0093] It is understood that the number of receiving cavities 10a can be one or more. Different types of devices can be arranged in a single receiving cavity 10a, or only devices of the same type can be arranged in a single receiving cavity 10a. Multiple devices can be arranged in a single receiving cavity 10a, or only a single device can be arranged in a single receiving cavity 10a.

[0094] By sealing the first sealing surface 10b with the second housing 12, the receiving cavity 10a is isolated from the outside of the battery device 100, thereby reducing the risk of external moisture and foreign objects entering the receiving cavity 10a and affecting the normal operation of the battery device 100.

[0095] The first sealing surface 10b can be a plane, a curved surface, or a combination of multiple planes and curved surfaces.

[0096] It is understandable that the devices within the cavity 10a may generate an electric arc, and the pressure wave generated by the arc will impact the wall of the cavity 10a. Since the first housing 11 and the second housing 12 are coupled together along the first direction, a portion of the pressure wave will exert a force along the first direction on the first housing 11 and the second housing 12, causing them to tend to separate along the first direction.

[0097] At least a portion of the normal direction of the first sealing surface 10b intersects the first direction, meaning the normal direction is not parallel to the first direction. Thus, when a pressure wave exerts a force along the first direction on the first housing 11 and the second housing 12, the force on the first sealing surface 10b can be decomposed into a force normal to the first sealing surface 10b and a force acting along the first sealing surface 10b, thereby reducing the risk of separation between the first sealing surface 10b and the second housing 12.

[0098] The battery device 100 in this embodiment of the application, by having at least a portion of the normal direction of the first sealing surface 10b intersect with the first direction, helps to reduce the force exerted on the first sealing surface 10b along the normal direction when a pressure wave is generated in the receiving cavity 10a. This reduces the adverse effect of the sealing failure of the first sealing surface 10b on the sealing effect of the receiving cavity 10a, and helps to improve the service life of the battery device 100.

[0099] In some embodiments, the normal direction of each position of the first sealing surface 10b intersects with the first direction, which helps to further reduce the normal force along the first sealing surface 10b on the whole, and helps to improve the sealing effect of the housing 10.

[0100] In some embodiments, at least a portion of the normal direction of the first sealing surface 10b is perpendicular to the first direction. This reduces the force between the first sealing surface 10b and the second housing along the normal direction of the first sealing surface 10b as much as possible, lowers the probability of separation between the two along the normal direction of the first sealing surface 10b, and helps to improve the sealing effect of the housing 10.

[0101] In some embodiments, see Figure 5 The second box 12 is provided with a cavity 12a, which is open on one side along the first direction. The first box 11 is placed on the open position of the cavity 12a to form a receiving cavity 10a together with the second box 12.

[0102] In some embodiments, see Figure 5 The first housing 11 includes a housing body 111 and a first sealing member 112. The first sealing member 112 is sandwiched between the housing body 111 and the second housing 12, and a first sealing surface 10b is formed between the first sealing member 112 and the second housing 12. The first sealing member 112 is capable of elastic deformation.

[0103] Thus, when relative movement occurs between the box body 111 and the second box body 12 along the first direction, the first seal 112 can play a buffering role by generating elastic deformation, reducing the risk of damage to the box body 111 and the second box body 12 due to collision; the elastic deformation of the first seal 112 helps the first seal 112 to maintain a close fit with the second box body 12, so as to maintain a stable sealing effect.

[0104] The first seal 112 is made of an elastic material, such as rubber or silicone.

[0105] The method of fixing the first sealing element 112 to the box body 111 is not limited, such as bonding.

[0106] Both the main body 111 and the second body 12 can be made of materials with good strength and rigidity, such as steel and aluminum alloy.

[0107] It is understandable that the first seal 112 is sealed and fitted with the housing 10.

[0108] In some embodiments, see Figure 5A second sealing surface 11a is formed between the first sealing element 112 and the box body 111, and at least a portion of the normal direction of the second sealing surface 11a intersects the first direction.

[0109] This helps to reduce the force on the second sealing surface 11a along the first direction when a pressure wave is generated in the receiving cavity 10a, thereby reducing the adverse effect of the sealing failure of the second sealing surface 11a on the sealing effect of the receiving cavity 10a and improving the service life of the battery device 100.

[0110] In some embodiments, at least a portion of the normal direction of the second sealing surface 11a is the same as the normal direction of at least a portion of the first sealing surface 10b.

[0111] This simplifies the structure of the box body 111, the first sealing element 112, and the second box body 12, making it easier for the three to cooperate and assemble.

[0112] In some embodiments, see Figure 5 The box body 111 includes a body portion 1111 and a flange portion 1112. The body portion 1111 covers the second box body 12. The flange portion 1112 is arranged around the peripheral edge of the body portion 1111 and extends along a first direction. At least a portion of the first sealing member 112 is sandwiched between the flange portion 1112 and the second box body 12. The first sealing member 112 is attached to the second box body 12 to form a first sealing surface 10b. The first sealing member 112 contacts the flange portion 1112 to form a second sealing surface 11a.

[0113] Thus, the normal direction of the first sealing surface 10b is perpendicular to the first direction, which helps to reduce the risk of separation between the box body 111 and the first seal 112, and between the first seal 112 and the second box body 12 along the first direction. The flange 1112 and the second box body 12 can achieve mutual constraint in the direction perpendicular to the first direction, and play a role in constraining and positioning the first seal 112.

[0114] In some embodiments where the second housing 12 has a cavity 12a, at least a portion of the flange 1112 and at least a portion of the first seal 112 may be located within the cavity 12a, with the wall of the cavity 12a and the flange 1112 together clamping the first seal 112; alternatively, see [reference needed]. Figure 5 The flange 1112 and the first seal 112 are located outside the second housing 12, and the first seal 112 is sandwiched between the outer wall of the second housing 12 and the flange 1112.

[0115] In some embodiments, the box body 111 is a one-piece structure. That is, the body part 1111 and the flange part 1112 are different parts of a single component. The flange part 1112 can be formed by stamping, bending, etc., which helps to simplify the manufacturing process of the box body 111.

[0116] In some embodiments, see Figures 3 to 5 The housing 10 also includes a first fastener 13. The first housing 11 and the second housing 12 are provided with a first through hole 10c on the side opposite to the receiving cavity 10a along the normal direction of the first sealing surface 10b, and a first blind hole 10d is provided on the side closer to the receiving cavity 10a. The first fastener 13 passes through the first through hole 10c and is fastened and sealed to the inner wall of the first blind hole 10d.

[0117] The first through hole 10c has openings at both ends along its extension direction, so that the first fastener 13 can enter the first through hole 10c from one end opening and extend from the other end opening.

[0118] The first blind hole 10d has an opening at one end along its extension direction and is closed at the other end, so that the first fastener 13 extending from the first through hole 10c extends into the first blind hole 10d through the opening of the first blind hole 10d.

[0119] The first blind hole 10d is connected to the first through hole 10c.

[0120] The first fastener 13 achieves a fixed connection between the first housing 11 and the second housing 12.

[0121] The first blind hole 10d is not connected to the receiving cavity 10a, so that the pressure wave of the air in the receiving cavity 10a cannot be transmitted to the first blind hole 10d and the first through hole 10c. This reduces the adverse effects of the impact and vibration generated by the pressure wave on the connection stability of the first fastener 13, and helps to improve the connection stability between the first housing 11 and the second housing 12.

[0122] The specific type of the first fastener 13 is not limited. For example, the first fastener 13 is a bolt, and the first blind hole 10d is a threaded hole.

[0123] In some embodiments, see Figures 3 to 5 The flange 1112 and the first seal 112 together form a first through hole 10c. The second housing 12 is provided with a first blind hole 10d. The first fastener 13 passes through the first through hole 10c and the first blind hole 10d. The inner wall of at least one of the first through hole 10c and the first blind hole 10d is sealed to the first fastener 13.

[0124] This allows the first housing 11 and the second housing 12 to be fastened together by the first fastener 13 after the first housing 11 and the second housing 12 are closed, which helps to improve the convenience of assembly operations.

[0125] The specific method of forming the first through hole 10c is not limited.

[0126] For example, see Figure 5 The box body 111 is provided with a through first sub-through hole 10ca, and the first sealing member 112 is provided with a through second sub-through hole 10cb. The first sub-through hole 10ca and the second sub-through hole 10cb are connected to each other to form the first through hole 10c.

[0127] In some embodiments, see Figure 5 At least a portion of the first sealing surface 10b is located on the side of the receiving cavity 10a perpendicular to the first direction.

[0128] This helps to reduce the outer contour dimensions of the battery device 100 along the first direction, making the structure of the battery device 100 more compact and improving the adaptability of the battery device 100.

[0129] In some embodiments, the angle between the normal direction of at least a portion of the first sealing surface 10b and the first direction ranges from 30° to 90°. That is, see [reference needed]. Figure 5 The angle between the normal direction of at least a portion of the first sealing surface 10b and the first direction is α, where 30°≤α≤90°.

[0130] It is understood that the angle between the normal direction of at least a portion of the first sealing surface 10b and the first direction refers to the acute angle formed between the normal direction and the first direction on the side closer to the first sealing surface 10b.

[0131] Thus, within this angular range, it is beneficial to further reduce the force of the pressure wave along the normal direction of the first sealing surface 10b when a pressure wave is generated in the receiving cavity 10a, thereby reducing the adverse effect of the sealing failure of the first sealing surface 10b on the sealing effect of the receiving cavity 10a, and thus improving the service life of the battery device 100.

[0132] The specific value of the angle between the normal direction of the first sealing surface 10b and the first direction can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0133] In some embodiments that include a second sealing surface 11a, the angle between the normal direction of at least a portion of the second sealing surface 11a and the first direction ranges from 30° to 90°. That is, see [reference needed]. Figure 5The angle between the normal direction of at least a portion of the second sealing surface 11a and the first direction is b, where 30°≤b≤90°.

[0134] It is understood that the angle between the normal direction of at least a portion of the second sealing surface 11a and the first direction refers to the acute angle formed between the straight line containing the normal direction and the straight line containing the first direction.

[0135] Thus, within this angular range, it is beneficial to further reduce the normal force along the second sealing surface 11a when a pressure wave is generated in the receiving cavity 10a, thereby reducing the adverse effect of the sealing failure of the second sealing surface 11a on the sealing effect of the receiving cavity 10a, and thus improving the service life of the battery device 100.

[0136] The specific value of the angle between the normal direction of the second sealing surface 11a and the first direction can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0137] The specific method for measuring the angle between the normal direction of the first sealing surface 10b and the first direction is not limited. For example, the housing 10 can be cut along the first direction, and the position of the first sealing surface 10b can be determined on the resulting cross-section. The normal to the first sealing surface 10b can be drawn on the cross-section, and a straight line along the first direction can be drawn. The angle between the normal and the straight line can then be measured to obtain the angle between the normal direction of the first sealing surface 10b at that position and the first direction. The method for measuring the angle between the normal direction of the second sealing surface 11a and the first direction can also refer to the above method.

[0138] It is understandable that the first sealing surface 10b is arranged around the second housing 12 perpendicular to the first direction. Therefore, the component of the pressure wave force perpendicular to the first direction will also affect the first sealing surface 10b.

[0139] In some embodiments, see Figure 6 The first sealing surface 10b includes an arc portion 10ba, the radius of which is greater than 10 millimeters. That is, the radius of the arc portion 10ba is R1, and R1 is greater than 10 millimeters.

[0140] This helps to reduce the stress concentration phenomenon on the first sealing surface 10b caused by the pressure wave, and reduces the risk of sealing failure of the first sealing surface 10b.

[0141] In some embodiments, the radius of the arc portion 10ba is greater than 50 mm.

[0142] This helps to further reduce the stress concentration phenomenon on the first sealing surface 10b caused by the pressure wave, and reduces the risk of sealing failure of the first sealing surface 10b.

[0143] The specific value of the radius of the arc portion 10ba can be 11 mm, 12 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, etc.

[0144] The arc portion 10ba is an arc surface, and its normal direction intersects with the first direction.

[0145] In some embodiments, the outer contour surface of the housing 10 is generally cubic in structure in order to improve the space utilization of the battery device 100 within the electrical device in which it is installed.

[0146] In some embodiments, see Figure 6 The normal direction of the first sealing surface 10b is perpendicular to the first direction. The first sealing surface 10b includes a first planar portion 10bb and a second planar portion 10bc. The first planar portion 10bb extends along the second direction, and the second planar portion 10bc extends along the third direction. The arc portion 10ba smoothly connects the first planar portion 10bb and the second planar portion 10bc. The first direction, the second direction and the third direction are perpendicular to each other.

[0147] In some embodiments, see Figure 6 The smaller of the length of the first planar portion 10bb along the second direction and the length of the second planar portion 10bc along the third direction is the first dimension, and the radius of the arc portion 10ba does not exceed one-quarter of the first dimension.

[0148] See Figure 6 The smaller of the length of the first planar portion 10bb along the second direction and the length of the second planar portion 10bc along the third direction is L1, and R1≤0.25*L1.

[0149] The arc portion 10ba forms an arc transition between the first planar portion 10bb and the second planar portion 10bc.

[0150] Thus, the arc portion 10ba helps to reduce the probability of damage caused by stress concentration at the connection point between the first flat portion 10bb and the second flat portion 10bc when the housing 10 is tortuous and deformed.

[0151] In some embodiments, the length of the first planar portion 10bb along the second direction is equal to the length of the second planar portion 10bc along the third direction, and the first dimension is the dimension of either of the two lengths.

[0152] In some embodiments, see Figure 3 , Figure 4 and Figure 7 The battery device 100 also includes a mounting post 30 and a second fastener 40. The mounting post 30 is located inside the receiving cavity 10a. The housing 10 is provided with a through second through hole 10i, which communicates with the receiving cavity 10a. At least a portion of the second fastener 40 is located outside the housing 10 and is connected to the mounting post 30 through the second through hole 10i. A portion of the housing 10 is sandwiched between the second fastener 40 and the mounting post 30.

[0153] The second fastener 40 is used to secure the battery unit 100 to other external structures. The second fastener 40 and the mounting post 30 constrain the housing 10 so that the battery unit 100 as a whole can be fixed to the external structure.

[0154] The specific form of connection between the mounting post 30 and the second fastener 40 is not limited. For example, one end of the mounting post 30 is provided with a threaded post, a portion of which extends out of the housing 10 through the second through hole 10i, and the second fastener 40 is a nut that is threadedly engaged with the threaded post; or, see [reference needed] Figure 7 The mounting post 30 is provided with a threaded hole, and the second fastener 40 is a bolt, which is threadedly engaged with the threaded hole of the mounting post 30.

[0155] In some embodiments, the portion of the second fastener 40 located outside the housing 10 is provided with a mounting boss, so that the battery device 100 can be installed or removed by engaging with the mounting boss using tools such as wrenches.

[0156] The specific shape of the mounting boss is not limited, such as a hexagonal boss, a square boss, etc.

[0157] In some embodiments, the portion of the second fastener 40 located outside the housing 10 is provided with a mounting hole so that it can be engaged with the mounting boss using tools such as an Allen wrench to enable the installation and removal of the battery device 100.

[0158] The specific shape of the mounting hole is not limited, such as a hexagonal hole, to achieve compatibility with hex wrenches.

[0159] The second through hole 10i can be set on the first housing 11 or on the second housing 12.

[0160] In some embodiments, see Figure 7 The second through hole 10i penetrates the housing 10 along the first direction. That is, the second through hole 10i is provided on at least one side wall of the receiving cavity 10a along the first direction.

[0161] The large surface area on both sides of the housing 10 along the first direction is beneficial for arranging larger-sized second through holes 10i, while reducing the adverse effects on the structural strength of the housing 10 itself.

[0162] In some embodiments, see Figure 7 A portion of the surface of the second fastener 40 is a third sealing surface 10e. The third sealing surface is located outside the housing 10 and is sealed to the housing 10. At least a portion of the normal direction of the third sealing surface 10e intersects with the first direction.

[0163] This helps to further reduce the force on the third sealing surface 10e along the normal direction of the third sealing surface 10e when pressure waves are generated in the receiving cavity 10a, thereby reducing the adverse effect of the sealing failure of the third sealing surface 10e on the sealing effect of the receiving cavity 10a, and thus helping to improve the service life of the battery device 100.

[0164] In some embodiments, see Figure 7 A portion of the first housing 11 is recessed toward the second housing 12 along a first direction to form a mounting portion 113. A second through hole 10i is located in the mounting portion 113. At least a portion of the mounting portion 113 is in contact with the third sealing surface 10e. A portion of the second fastener 40 passes through the second through hole 10i and is fastened to the mounting post 30. The battery device 100 also includes a second seal 50. The second seal 50 is capable of elastic deformation. The second seal 50 is arranged around the periphery of the second fastener 40 and is at least partially sandwiched between the mounting portion 113 and the mounting post 30.

[0165] In this way, the second seal 50 is fixed, which helps to reduce the probability of foreign objects entering the cavity 10a through the second through hole 10i, thereby increasing the service life of the battery device 100.

[0166] The material of the second seal 50 can be rubber, silicone, etc.

[0167] In some embodiments, see Figure 7 The angle between the normal direction of at least a portion of the third sealing surface 10e and the first direction ranges from 30° to 60°. That is, referring to the figure, the angle between the normal direction of at least a portion of the second sealing surface 11a and the first direction is c, where 30°≤c≤90°.

[0168] This helps to further reduce the force exerted on the third sealing surface 10e along the normal direction of the third sealing surface 10e when pressure waves are generated in the receiving cavity 10a, thereby reducing the adverse effect of the sealing failure of the third sealing surface 10e on the sealing effect of the receiving cavity 10a, and thus helping to improve the service life of the battery device 100.

[0169] The method for measuring the angle between the normal direction of the third sealing surface 10e and the first direction can refer to the aforementioned method for measuring the angle between the normal direction of the first sealing surface 10b and the first direction.

[0170] The specific value of the angle between the normal direction of the third sealing surface 10e and the first direction can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0171] It is understandable that a portion of the surface of the mounting portion 113 forms part of the wall of the receiving cavity 10a.

[0172] In some embodiments, see Figure 7 The surface of the second seal 50 that is sealed and fitted with the mounting part 113 forms a fourth sealing surface 10f, and the normal direction of at least a portion of the fourth sealing surface 10f intersects with the first direction.

[0173] This helps to reduce the force exerted on the fourth sealing surface 10f along the normal direction of the fourth sealing surface 10f when a pressure wave is generated in the receiving cavity 10a, thereby reducing the adverse effect of the sealing failure of the fourth sealing surface 10f on the sealing effect of the receiving cavity 10a, and thus helping to improve the service life of the battery device 100.

[0174] In some embodiments, see Figure 7 The surface of the second seal 50 that is sealed and fitted with the mounting post 30 forms a fifth sealing surface 10g, and the normal direction of at least a portion of the fifth sealing surface 10g intersects with the first direction.

[0175] This helps to reduce the force exerted on the fifth sealing surface 10g along the normal direction of the fifth sealing surface 10g when a pressure wave is generated in the receiving cavity 10a, thereby reducing the adverse effect of the sealing failure of the fifth sealing surface 10g on the sealing effect of the receiving cavity 10a, and thus helping to improve the service life of the battery device 100.

[0176] In some embodiments, see Figure 7 The wall of the cavity 10a and the mounting column 30 are provided with a sealing protrusion 14 and a sealing groove 30a, respectively. A portion of the second sealing member 50 abuts against the sealing protrusion 14 and is embedded in the sealing groove 30a.

[0177] The sealing protrusion 14 abuts against a portion of the second seal 50, thereby squeezing that portion of the second seal 50 to deform and embed into the sealing groove 30a.

[0178] This will help to further improve the sealing effect on the receiving cavity 10a.

[0179] In some embodiments, see Figure 7 The sealing protrusion 14 protrudes along the first direction, and the sealing groove 30a is recessed along the first direction.

[0180] In this way, even when pressure waves are generated in the receiving cavity 10a, the second seal 50 embedded in the sealing groove 30a can still maintain a good sealing effect.

[0181] In some embodiments, the sealing protrusion 14 and the sealing groove 30a are both arranged around the periphery of the second through hole 10i to improve the sealing effect.

[0182] The specific number of sealing protrusions 14 is not limited; there can be one or more. The number of sealing grooves 30a is the same as the number of sealing protrusions 14, and the two are configured in a one-to-one correspondence.

[0183] In some embodiments, see Figures 8 to 10 The receiving cavity 10a has a plurality of first wave-damping grooves 10h on at least one side wall along the first direction. One side of the first wave-damping groove 10h is open and communicates with the receiving cavity 10a. The first wave-damping groove 10h gradually contracts in a direction away from its open position.

[0184] When a pressure wave is generated in the receiving cavity 10a, the pressure wave can diffuse into the first wave-absorbing groove 10h and come into contact with the wall of the first wave-absorbing groove 10h, so that part of the pressure wave can be reflected and scattered in the first wave-absorbing groove 10h, and can cancel out the pressure wave that subsequently enters the first wave-absorbing groove 10h.

[0185] Thus, by weakening the energy of the pressure wave through the first wave-damping groove 10h, it is beneficial to reduce the energy of the pressure wave transmitted to the housing 10, thereby reducing the deformation and vibration of the housing 10 under the action of the pressure wave, and thus reducing the adverse effects on the sealing effect of the housing 10.

[0186] In the cross section along the first direction, the cross section of the first wave-damping groove 10h can be triangular, arc-shaped, wavy, etc.

[0187] In the projection plane along the first direction, the projection of the first wave-damping groove 10h can be a circle, a polygon, etc.

[0188] In some embodiments, the first wave-damping groove 10h is located in the first housing 11. In some embodiments, the first wave-damping groove 10h is located in the second housing 12.

[0189] It is understandable that the first wave-damping groove 10h can be formed integrally by the first box 11 and the second box 12 during the manufacturing process through stamping or other methods, or it can be formed by cutting after the first box 11 and the second box 12 have been manufactured.

[0190] In some embodiments, the receiving cavity 10a has a first wave-damping groove 10h on its sidewall in a direction perpendicular to the first direction, which helps to further weaken the energy of the pressure wave.

[0191] In some embodiments, see Figures 11 to 13 The battery device 100 includes a buffer 60. The buffer 60 is provided on at least one side wall of the receiving cavity 10a along a first direction. The buffer 60 is made of a porous material.

[0192] The inner wall of the buffer 60 is provided with a large number of interconnected pores, at least some of which are connected to the receiving cavity 10a.

[0193] When a pressure wave is generated in the cavity 10a, the pressure wave can diffuse into the pores inside the buffer 60 and come into contact with the wall of the pores, so that part of the pressure wave can be reflected and scattered in the pores, thereby consuming the energy of the pressure wave.

[0194] In this way, the energy of the pressure wave is consumed by the buffer 60, reducing the energy of the pressure wave acting on the housing 10, thereby reducing the deformation and vibration of the housing 10 under the action of the pressure wave, and thus reducing the adverse effects on the sealing effect of the housing 10.

[0195] The material used to manufacture the buffer 60 is not limited, such as porous glass fiber, porous polyester fiber, metal foam, boron fiber, ceramic fiber, etc.

[0196] In some embodiments, the receiving cavity 10a has a buffer 60 on its sidewall in a direction perpendicular to the first direction.

[0197] In some embodiments, see Figure 13 The battery cell assembly 20 is connected to the second housing 12. The wall of the first housing 11 facing the receiving cavity 10a along the first direction is the first surface 10aa. The buffer 60 is connected to the first surface 10aa.

[0198] In some embodiments, see Figure 13 The buffer 60 has a plurality of second wave-damping grooves 60a on the side opposite to the first surface 10aa. One side of the second wave-damping groove 60a is open and communicates with the receiving cavity 10a.

[0199] When a pressure wave is generated in the receiving cavity 10a, the pressure wave can diffuse into the second wave-absorbing groove 60a and come into contact with the wall of the first wave-absorbing groove 10h, so that part of the pressure wave can be reflected and scattered in the second wave-absorbing groove 60a, and can cancel out the pressure wave that subsequently enters the second wave-absorbing groove 60a.

[0200] Thus, by weakening the energy of the pressure wave through the second wave-damping groove 60a, the energy of the pressure wave transmitted to the housing 10 can be further reduced, thereby reducing the deformation and vibration of the housing 10 under the action of the pressure wave, and thus reducing the adverse effects on the sealing effect of the housing 10.

[0201] In some embodiments, see Figure 12 and Figure 13 The second wave-damping groove 60a penetrates the buffer member 60.

[0202] In some embodiments, the side of the second wave-damping groove 60a away from its open position is a closed end, and the second wave-damping groove 60a gradually contracts in a direction away from its own open position.

[0203] In the cross section along the first direction, the cross section of the second wave-damping groove 60a can be triangular, circular arc, wavy, etc.

[0204] In the projection plane along the first direction, the projection of the second wave-damping groove 60a can be a circle, an ellipse, a polygon, etc.

[0205] A specific embodiment of the battery device 100 in this application is described below.

[0206] The battery device 100 includes a housing 10, a battery cell assembly 20, a mounting post 30, a second fastener 40, a second seal 50, and a buffer 60. The housing 10 includes a first housing 11, a second housing 12, and a first fastener 13. The first housing 11 mates with the second housing 12 along a first direction to jointly enclose a receiving cavity 10a. The battery cell assembly 20 includes at least one battery cell 21 and is housed within the receiving cavity 10a. The first housing 11 includes a housing body 111 and a first seal 112, which is sandwiched between the housing body 111 and the second housing 12 and is capable of elastic deformation. A first sealing surface 10b is formed between the surfaces of the first seal 112 and the second housing 12, and the first sealing surface 10b is in a sealed fit with the second housing 12. The normal direction of the first sealing surface 10b intersects with the first direction. The housing body 111 includes a body portion 1111 and a flange portion 1112. The body portion 1111 covers the second housing body 12. The flange portion 1112 is arranged around the peripheral edge of the body portion 1111 and extends along a first direction. At least a portion of the first sealing member 112 is sandwiched between the flange portion 1112 and the second housing body 12. The first sealing member 112 contacts the flange portion 1112 and forms a second sealing surface 11a. The normal direction of at least a portion of the second sealing surface 11a intersects the first direction. The flange portion 1112 and the first sealing member 112 together form a first through hole 10c. The second housing body 12 is provided with a first blind hole 10d. A first fastener 13 passes through the first through hole 10c and the first blind hole 10d. The inner wall of at least one of the first through hole 10c and the first blind hole 10d is sealed to the first fastener 13. At least a portion of the first sealing surface 10b is located on the side of the receiving cavity 10a perpendicular to the first direction. The angle between the normal direction of at least a portion of the first sealing surface 10b and the first direction ranges from 30° to 90°. The angle between the normal direction of at least a portion of the second sealing surface 11a and the first direction ranges from 30° to 90°. The first sealing surface 10b includes an arc portion 10ba, a first flat portion 10bb, and a second flat portion 10bc. The first flat portion 10bb extends along a second direction, and the second flat portion 10bc extends along a third direction. The radius of the arc portion 10ba is greater than 10 mm. The arc portion 10ba smoothly connects the first flat portion 10bb and the second flat portion 10bc. The smaller of the length of the first flat portion 10bb along the second direction and the length of the second flat portion 10bc along the third direction is a first dimension. The radius of the arc portion 10ba does not exceed one-quarter of the first dimension.The mounting post 30 is located within the receiving cavity 10a. The housing 10 has a second through hole 10i extending along the first direction, communicating with the receiving cavity 10a. At least a portion of the second fastener 40 is located outside the housing 10 and connected to the mounting post 30 through the second through hole 10i. A portion of the housing 10 is sandwiched between the second fastener 40 and the mounting post 30. A portion of the surface of the second fastener 40 is a third sealing surface 10e, located outside the housing 10 and sealingly fitted to it. The normal direction of at least a portion of the third sealing surface 10e intersects the first direction. The angle between the normal direction of at least a portion of the third sealing surface 10e and the first direction ranges from 30° to 60°. A portion of the first housing 11 is recessed towards the second housing 12 along a first direction to form a mounting portion 113. A second through hole 10i is located in the mounting portion 113. At least a portion of the mounting portion 113 is in contact with the third sealing surface 10e. A portion of the second fastener 40 passes through the second through hole 10i and is fastened to the mounting post 30. The second sealing member 50 is capable of elastic deformation. The second sealing member 50 is circumferentially disposed around the second fastener 40 and at least partially sandwiched between the mounting portion 113 and the mounting post 30. One of the wall surface of the receiving cavity 10a and the mounting post 30 is provided with a sealing protrusion 14, and the other is provided with a sealing groove 30a. A portion of the second sealing member 50 abuts against the sealing protrusion 14 and is embedded in the sealing groove 30a. The receiving cavity 10a has a plurality of recessed first wave-damping grooves 10h along at least one side of its wall surface in the first direction. One side of the first wave-damping groove 10h is open and communicates with the receiving cavity 10a. The first wave-damping groove 10h gradually contracts in a direction away from its open position. The battery cell assembly 20 is connected to the second housing 12. The first housing 11 has a first surface 10aa along at least one side of its wall facing the receiving cavity 10a in the first direction. A buffer member 60 is connected to the first surface 10aa and is made of a porous material. The buffer member 60 has a plurality of second wave-damping grooves 60a on the side opposite to the first surface 10aa. One side of the second wave-damping grooves 60a is open and communicates with the receiving cavity 10a.

[0207] This application also provides an electrical device, which includes a battery device 100 as described in any of the foregoing embodiments.

[0208] This helps improve the operational stability of the electrical device during the use of the battery device 100 and extends its service life.

[0209] In some embodiments where the electrical device is a vehicle 1000, the first direction is the direction of gravity. This is beneficial because the gap of the first sealing surface 10b does not directly face the driving direction of the vehicle 1000, which helps to reduce the adverse effects of the undulations and bounces generated by the vehicle 1000 along the first direction during driving on the sealing effect of the first sealing surface 10b.

[0210] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0211] The above are merely preferred embodiments of this application and are not intended to limit the embodiments in this application. For those skilled in the art, the embodiments of this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A battery device, characterized by, The application relates to a battery module, comprising: a box body including a first box body and a second box body, the first box body being matched with the second box body along a first direction to jointly form a containing cavity, a part of a surface of the first box body forming a first sealing surface, the first sealing surface being sealingly matched with the second box body, a normal direction of the first sealing surface intersecting the first direction; a battery cell assembly including at least one battery cell, the battery cell assembly being accommodated in the containing cavity; a mounting column and a second fastener, the mounting column being located in the containing cavity, the box body being provided with a second through hole penetrating along the first direction, the second through hole being communicated with the containing cavity, at least a part of the second fastener being located outside the box body and connected with the mounting column through the second through hole, a part of the box body being clamped between the part of the second fastener and the mounting column, a part of a surface of the second fastener being a third sealing surface, the third sealing surface being located outside the box body and sealingly matched with the box body, a normal direction of at least a part of the third sealing surface intersecting the first direction.

2. The battery device according to claim 1, characterized by At least a part of the first sealing surface is located on a side of the containing cavity perpendicular to the first direction.

3. The battery device of claim 1, wherein An included angle between the normal direction of at least a part of the first sealing surface and the first direction ranges from 30 degrees to 90 degrees.

4. The battery device of claim 3, wherein The normal direction of the first sealing surface is perpendicular to the first direction, the first sealing surface including a first planar part, a second planar part and a circular arc part, the first planar part extending along a second direction, the second planar part extending along a third direction, the circular arc part smoothly connecting the first planar part and the second planar part, a radius of the circular arc part being greater than 10 millimeters, the first direction, the second direction and the third direction being perpendicular to each other.

5. The battery device of claim 4, wherein, A size of a smaller one of a length of the first planar part along the second direction and a length of the second planar part along the third direction is a first size, the radius of the circular arc part being not more than one fourth of the first size.

6. The battery device according to any one of claims 1 to 5, wherein The first box body includes a box body and a first sealing member, the first sealing member being clamped between the box body and the second box body, a surface of the first sealing member matched with the second box body forming the first sealing surface, the first sealing member being capable of elastically deforming.

7. The battery device of claim 6, wherein A surface of the first sealing member matched with the box body forms a second sealing surface, a normal direction of at least a part of the second sealing surface intersecting the first direction.

8. The battery device of claim 6, wherein, The box body includes a body part and a flange part, the body part covering the second box body, the flange part being annularly arranged at a circumferential edge of the body part and extending along the first direction, at least a part of the first sealing member being clamped between the flange part and the second box body, the first sealing member being matched with the second box body and forming the first sealing surface, the first sealing member being in contact with the flange part and forming a second sealing surface.

9. The battery device of claim 8, wherein, The box further comprises a first fastener, the flange portion and the first seal member jointly form a first through hole, the second box is provided with a first blind hole, the first fastener is arranged in the first through hole and the first blind hole, and the inner wall of at least one of the first through hole and the first blind hole is in sealing connection with the first fastener.

10. The battery device of claim 1, wherein, The angle between the normal direction of at least part of the third sealing surface and the first direction ranges from 30° to 60°.

11. The battery device of claim 1, wherein Part of the first box is recessed along the first direction to form a mounting portion towards the second box, the second through hole is located in the mounting portion, at least part of the mounting portion is in abutment with the third sealing surface, part of the second fastener passes through the second through hole and is in fastening connection with the mounting column, and the battery device further comprises a second seal member capable of elastic deformation, the second seal member is annularly arranged on the side of the second fastener and is at least partially clamped between the mounting portion and the mounting column.

12. The battery device of claim 11, wherein, One of the wall surface of the accommodating cavity and the mounting column is provided with a sealing protrusion, and the other is provided with a sealing groove, part of the second seal member is in abutment with the sealing protrusion and is embedded in the sealing groove.

13. The battery device of any one of claims 1-5, wherein, At least one side wall surface of the accommodating cavity along the first direction is provided with a plurality of recessed first wave absorbing grooves, one side of the first wave absorbing grooves is open and communicates with the accommodating cavity, and the first wave absorbing grooves gradually shrink in the direction away from the open position thereof.

14. The battery device of any one of claims 1-5, wherein, The battery device comprises a buffer member, the battery monomer assembly is connected to the second box, the first wall surface of the first box along the first direction towards the accommodating cavity is a first surface, the buffer member is connected to the first surface, and the buffer member is made of porous material.

15. The battery device of claim 14, wherein, The side of the buffer member away from the first surface is provided with a plurality of second wave absorbing grooves, one side of the second wave absorbing grooves is open and communicates with the accommodating cavity.

16. An electrical device, comprising: The power consumption device comprises the battery device according to any one of claims 1-15. The power consumption device comprises the battery device according to any one of claims 1-15.

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