Battery device and electric equipment

Abstract

According to the battery device and the electric equipment, when the base is covered with the cover body, the first matching piece and the second matching piece are matched with each other and are bonded and sealed through the sealing piece, effective bonding between the first matching piece and the second matching piece is achieved, and sealing between the cover body and the base is also achieved. Meanwhile, the thickness of the base and / or the cover body is controlled between 0.8 mm and 2 mm, so that a larger accommodating space is reserved between the base and the cover body by controlling the thickness of the base or the cover body. At least one of the two side faces, facing each other, of the first matching piece and the second matching piece is provided with the concave part, so that part of the sealing piece can be embedded into the concave part, and the thickness of the sealing piece is increased. According to the design, under the condition that the energy density improvement requirement is met, the sealing failure between the sealing piece and the first matching piece or the second matching piece caused by deformation of the cover body or the base is reduced, so that the sealing reliability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] With the rapid development of battery technology, the requirements for battery reliability are also increasing. Therefore, sealant is typically used for bonding batteries during encapsulation. However, with the increasing demand for high energy density in battery designs, sealant failure can easily occur at the sealant points, affecting battery reliability. Utility Model Content

[0003] Therefore, it is necessary to provide a battery device and electrical equipment that, while meeting the demand for increased energy density, helps to improve the reliability of the battery device's sealing.

[0004] In a first aspect, this application provides a battery device, which includes: a base including a first mating member; a cover covering the base and including a second mating member that mates with the first mating member; and a seal bonded between the first mating member and the second mating member, wherein the thickness of the base and / or the cover is 0.8 mm to 2 mm; wherein at least one of the two sides of the first mating member and the second mating member facing each other is provided with a recess, and the seal is partially disposed in the recess.

[0005] In the aforementioned battery device, when the cover is placed on the base, the first and second mating parts cooperate with each other and are sealed together by a sealing element. This not only achieves effective adhesion between the first and second mating parts but also seals the cover and the base. Furthermore, since the thickness of the base and / or the cover is controlled between 0.8mm and 2mm, this control allows for a larger accommodating space between them. Also, because at least one of the facing sides of the first and second mating parts has a recess, a portion of the sealing element is embedded in the recess, increasing the thickness of the sealing element. This design, while meeting the requirements for increased energy density, reduces the risk of seal failure between the sealing element and the first or second mating parts due to deformation of the cover or base, thereby improving the reliability of the battery device's seal.

[0006] In some embodiments, the depth of the recess is denoted as h0, where 0.4mm ≤ h0 ≤ 0.6mm. This design controls the depth of the recess between 0.4mm and 0.6mm, effectively balancing the thickness of the seal and the structural strength of the first or second mating part, thereby effectively improving the reliability of the battery device.

[0007] In some embodiments, the battery device includes fasteners for securing the first mating member and the second mating member. This design, with the introduction of fasteners, ensures a stable connection between the first and second mating members, thereby improving the structural stability of the battery device.

[0008] In some embodiments, the recess is located on the side of the fastener facing inward toward the base. This design, with the recess positioned on the side of the fastener facing inward toward the battery device, allows the first mating member and the second mating member to be fastened externally and sealed internally, thereby further improving the reliability of the battery device's seal.

[0009] In some embodiments, the base further includes a first body, and the cover further includes a second body. A first mating member is arranged around the outer periphery of the first body, and a second mating member is arranged around the outer periphery of the second body, forming a receiving space between the first body and the second body. This design, by introducing the first body and the second body, provides a closed receiving space for the battery cell, which helps to improve the structural stability of the battery device.

[0010] In some embodiments, the recess is disposed around the outer periphery of the receiving space. This design ensures that the portion of the seal within the recess also surrounds the outer periphery of the receiving space, further improving the sealing reliability of the battery device.

[0011] In some embodiments, the first body has a first protrusion, one end of which extends to the first mating member. This design, by introducing the first protrusion, can enhance the structural strength of the first body and the first mating member, which is beneficial to improving the reliability of the battery device seal.

[0012] In some embodiments, the second body is provided with a second protrusion, one end of which extends to the second mating member. This design, by introducing the second protrusion, can enhance the structural strength of the second body and the second mating member, which is beneficial to improving the reliability of the battery device seal.

[0013] In some embodiments, the dimension of the portion where the first mating member and the second mating member project and overlap each other along the direction from one end of the first mating member away from the interior of the base to the other end of the first mating member away from the interior of the base is denoted as W, where 5mm≤W≤15mm. This design controls the dimension W between 5mm and 15mm, reducing the space occupied by the battery device while meeting the requirements of effective sealing area.

[0014] In some embodiments, the dimension W also satisfies the condition that 6mm ≤ W ≤ 10mm. This design controls the dimension W between 6mm and 10mm, further effectively balancing the sealing effect and the external space occupied by the battery device.

[0015] In some embodiments, the thickness of the cover is denoted as h2, where 0.8 mm ≤ h2 ≤ 1.6 mm. This design controls the thickness h2 between 0.8 mm and 1.6 mm, achieving a higher energy density for the battery device while ensuring effective sealing.

[0016] In some embodiments, the first mating component includes a first substrate and a first coating, with the first coating covering the first substrate. This design introduces the first coating to facilitate the protection of the surface of the first mating component; at the same time, it also facilitates the bonding of the sealant, improving the sealing effect.

[0017] In some embodiments, the material of the first coating is epoxy resin. This design, which makes the first coating an epoxy resin-containing structure, gives the base good corrosion resistance and strong adhesion.

[0018] In some embodiments, the first coating includes a first electrophoretic coating and a first spray coating, wherein the first electrophoretic coating is disposed on the surface of the first substrate, and the first spray coating is disposed on the surface of the first electrophoretic coating. This design, in which the first coating is designed as both a first electrophoretic coating and a first spray coating, is beneficial for improving the corrosion resistance and adhesion performance of the substrate.

[0019] In some embodiments, the second mating component includes a second substrate and a second coating, with the second coating covering the second substrate. This design introduces the second coating to facilitate the protection of the surface of the second mating component; at the same time, it also facilitates the bonding of the sealant, improving the sealing effect.

[0020] In some embodiments, the material of the second coating is epoxy resin. This design, which makes the second coating an epoxy resin-containing structure, gives the cover good corrosion resistance and strong adhesion.

[0021] In some embodiments, the second coating comprises a second electrophoretic coating and a second spray coating, wherein the second electrophoretic coating is disposed on the surface of the second substrate, and the second spray coating is disposed on the surface of the second electrophoretic coating. This design, comprising a second electrophoretic coating and a second spray coating, is beneficial for improving the corrosion resistance and adhesion performance of the cover.

[0022] In some embodiments, the seal is constructed from materials comprising component A and component B, where component A comprises a modified siloxane and component B comprises an epoxy resin. This design, employing an epoxy and modified siloxane hybrid adhesive system, enables the battery device to achieve high adhesion and sealing performance under vibration and shock conditions, while also achieving cohesive failure of the adhesive itself.

[0023] In some embodiments, the battery device further includes individual battery cells housed between the cover and the base. This design provides a sealed environment for the battery cells, achieving an effective sealing effect.

[0024] Secondly, this application provides an electrical device that includes the battery device described above. Attached Figure Description

[0025] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0026] Figure 2 Exploded views of battery devices provided in some embodiments of this application.

[0027] Figure 3 This is a structurally exploded view of the base, seal, and cover provided in some embodiments of this application.

[0028] Figure 4 This is a partial schematic diagram of the structure of the first mating member provided in some embodiments of this application.

[0029] Figure 5 Structural cross-section of the first mating member provided in some embodiments of this application Figure 1 .

[0030] Figure 6 Structural cross-section of the first mating member provided in some embodiments of this application Figure 2 .

[0031] Figure 7 A cross-sectional view of the structure of the second mating component provided in some embodiments of this application.

[0032] 1000, Vehicle; 100, Battery assembly; 200, Controller; 300, Motor; 10, Battery cell; 20, Base; 21, First mating part; 211, First substrate; 212, First coating; 21a, First electrophoretic coating; 21b, First spray coating; 22, First body; 221, First protrusion; 30, Cover; 31, Second mating part; 311, Second substrate; 312, Second coating; 31a, Second electrophoretic coating; 31b, Second spray coating; 32, Second body; 321, Second protrusion; 40, Recess; 50, Fastener; 60, Receiving space; 70, Seal. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] 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.

[0040] During the sealing and encapsulation of battery devices, sealant is typically used to bond the base and cover together to achieve an internal seal. However, with the increasing energy density of batteries, the base or cover is prone to structural deformation. When this deformation occurs, the sealant can easily separate from the base or cover, leading to seal failure and impacting the reliability of the battery device.

[0041] Based on this, addressing the issue of sealing failure at the sealing point due to structural deformation caused by increased energy density in traditional battery devices, this application provides a battery device in which, when the cover is placed on the base, the first mating component and the second mating component cooperate with each other and are sealed together by a sealing element. This not only achieves effective adhesion between the first and second mating components but also ensures a seal between the cover and the base. Furthermore, since the thickness of the base and / or the cover is controlled between 0.8mm and 2mm, a larger accommodating space is provided between the base and the cover. Also, since at least one of the two sides of the first and second mating components facing each other has a recess, part of the sealing element is embedded in the recess, increasing the thickness of the sealing element. This design, while meeting the requirements for increased energy density, reduces the risk of sealing failure between the sealing element and the first or second mating component due to deformation of the cover or base, thereby improving the reliability of the battery device's seal.

[0042] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using battery cells and battery devices disclosed in this application.

[0043] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0044] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0045] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and 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.

[0046] 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.

[0047] Please refer to Figure 2 , Figure 2This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing and a battery cell 10, with the battery cell 10 housed within the housing. The housing provides a receiving space 60 for the battery cell 10, and the housing can adopt various structures. In some embodiments, the housing may include a cover 30 and a base 20, with the cover 30 and base 20 overlapping each other, together defining the receiving space 60 for accommodating the battery cell 10. The base 20 may be a hollow structure with one open end, and the cover 30 may be a plate-like structure, fitting over the open side of the base 20 so that the cover 30 and base 20 together define the receiving space 60; alternatively, both the cover 30 and base 20 may be hollow structures with one open side, with the open side of the cover 30 fitting over the open side of the base 20. Of course, the housing formed by the cover 30 and base 20 can be of various shapes, such as a cylinder, a cuboid, etc.

[0048] In the battery device 100, there can be multiple battery cells 10, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 10 are connected in both series and parallel connections. Multiple battery cells 10 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 10 is housed within a casing. Alternatively, the battery device 100 can also consist of multiple battery cells 10 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within a casing. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 10.

[0049] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0050] According to some embodiments of this application, please refer to Figure 3 and Figure 4 This application provides a battery device 100, which includes a base 20, a cover 30, and a sealing member 70. The base 20 includes a first mating member 21; the cover 30 is disposed on the base 20 and includes a second mating member 31 that mates with the first mating member 21. The thickness of the base 20 and / or the cover 30 is 0.8 mm to 2 mm. The sealing member 70 is bonded between the first mating member 21 and the second mating member 31; wherein, at least one of the two sides of the first mating member 21 and the second mating member 31 facing each other has a recess 40, and the sealing member 70 is partially disposed within the recess 40.

[0051] The first mating part 21 and the second mating part 31 refer to the structures that connect the base 20 and the cover 30, respectively. The sealing element 70 is bonded between the first mating part 21 and the second mating part 31, which not only ensures an effective connection between the first mating part 21 and the second mating part 31, but also eliminates the gap between them, achieving an effective seal. To achieve a circumferential seal for the battery device 100, both the first mating part 21 and the second mating part 31 can be designed as annular structures. The sealing element 70 can be a sealant.

[0052] When the thickness of at least one of the base 20 and the cover 30 is controlled between 0.8mm and 2mm, it indicates that the space occupied by the base 20 or the cover 30 inwards in the battery device 100 is reduced. This is beneficial for increasing the internal space of the battery device 100, making it easier to accommodate more or larger battery cells 10, thereby improving the energy density of the battery device 100. The thickness of at least one of the base and the cover 30 can be, but is not limited to, 0.8mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, etc., so that the base 20 or the cover 30 is relatively thin, which can achieve a higher energy density.

[0053] The recess 40 refers to the structure formed by the inward indentation of the surface of the first mating part 21 or the second mating part 31. When the sealing member 70 is bonded between the first mating part 21 and the second mating part 31, a portion of it will be embedded in the recess 40, thus increasing the thickness of the sealing member 70 between the first mating part 21 and the second mating part 31. If the base 20 or the cover 30 undergoes structural deformation, resulting in an increase in the gap between the base 20 and the cover 30, the sealing member 70 will thicken due to the presence of the recess 40, allowing it to continue sealing between the first mating part 21 and the second mating part 31, achieving an effective seal and reducing the probability of seal failure.

[0054] When the recesses 40 are respectively provided on the first mating member 21 and the second mating member 31, the recesses 40 of the first mating member 21 must be opposite to the recesses 40 of the second mating member 31. In this way, after the first mating member 21 and the second mating member 31 are mated, one end of the sealing member 70 can be located in the recess 40 of the first mating member 21, and the other end can be located in the recess 40 of the second mating member 31.

[0055] Alternatively, the recess 40 can be a closed annular structure, for example, the recess 40 can be arranged in a ring around the first mating member 21 or the second mating member 31. In this case, the number of recesses 40 can be one or more, for example, multiple recesses 40 can be arranged sequentially around the first mating member 21 or the second mating member 31 from the inside out. The recess 40 can also have other structures, for example, multiple recesses 40 can be distributed at intervals along the circumference of the first mating member 21 or the second mating member 31.

[0056] This design, while meeting the demand for increased energy density, reduces the risk of sealing failure between the sealing element 70 and the first mating element 21 or the second mating element 31 due to deformation of the cover 30 or the base 20, thereby improving the reliability of the battery device 100 seal.

[0057] Optionally, according to some embodiments of this application, please refer to Figure 5 The depth of the recess 40 is denoted as h0, where 0.4mm≤h0≤0.6mm.

[0058] If the depth of the recess 40 is too large, it will affect the structural strength of the first mating part 21 or the second mating part 31, and affect the stability of the joint between them. Therefore, in this embodiment, the depth of the recess 40 is controlled between 0.4mm and 0.6mm, for example, but not limited to 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, etc.

[0059] This design controls the depth of the recess 40 to between 0.4mm and 0.6mm, effectively balancing the thickness of the seal 70 and the structural strength of the first mating part 21 or the second mating part 31, thereby effectively improving the reliability of the battery device 100.

[0060] Optionally, according to some embodiments of this application, please refer to Figure 3 The battery device 100 includes a fastener 50 for securing the first mating member 21 and the second mating member 31.

[0061] Fastener 50 refers to a structure that can fasten the first mating member 21 and the second mating member 31, and may be, but is not limited to, pins, bolts, rivets, etc. When there are multiple fasteners 50, at least some of the fasteners 50 are distributed circumferentially at intervals along the first mating member 21 or the second mating member 31. Furthermore, when fastening the first mating member 21 and the second mating member 31, the fastener 50 may act within the recess 40; or it may be located on one side of the recess 40. Specifically, in some examples, the fastener 50 may be a rivet to allow for fastening in situations where space is limited.

[0062] This design, with the introduction of fasteners 50, ensures a stable connection between the first mating part 21 and the second mating part 31, which helps to improve the structural stability of the battery device 100.

[0063] Optionally, according to some embodiments of this application, please refer to Figure 4 The recess 40 is located on the side of the fastener 50 facing the inside of the base 20.

[0064] The recess 40 is located on the side of the fastener 50 facing the inner wall of the base 20, indicating that the fastener 50 is closer to the outside of the battery device 100 than the recess 40, so that the first mating member 21 and the second mating member 31 are fastened to the outside by the fastener 50 and sealed to the inside by the seal 70 in the recess 40.

[0065] With this design, the recess 40 is located on the side of the fastener 50 facing the inside of the battery device 100, so that the first mating part 21 and the second mating part 31 are fastened from the outside and sealed from the inside, thereby further improving the sealing reliability of the battery device 100.

[0066] Optionally, according to some embodiments of this application, please refer to Figure 3 The base 20 also includes a first main body 22, and the cover 30 also includes a second main body 32. A first mating member 21 is arranged around the outer periphery of the first main body 22, and a second mating member 31 is arranged around the outer periphery of the second main body 32. An accommodating space 60 is formed between the first main body 22 and the second main body 32.

[0067] As can be seen, when the second body 32 covers the first body 22, the first mating part 21 and the second mating part 31 cooperate with each other and are bonded together by the sealing part 70. At this time, a closed receiving space 60 is formed between the first body 22 and the second body 32 to accommodate the battery cell 10. The first mating part 21 has an annular structure on the outer periphery of the first body 22 and protrudes from the edge of the first body 22. Similarly, the second mating part 31 has an annular structure on the outer periphery of the second body 32 and protrudes from the edge of the second body 32. This facilitates the bonding and sealing of the first mating part 21 and the second mating part 31.

[0068] The first mating component 21 can be fixed to the first main body 22 by means of bolt connection, welding, snap-fit, etc., or it can be an integral structure with the first main body 22, for example, the two can be integrally formed by injection molding, die casting, stamping, 3D printing, etc. The second mating component 31 can be fixed to the second main body 32 by means of bolt connection, welding, snap-fit, etc., or it can be an integral structure with the second main body 32, for example, the two can be integrally formed by injection molding, die casting, stamping, 3D printing, etc.

[0069] In addition, the recess 40 may be arranged in a ring around the outer periphery of the receiving space 60 on the first mating member 21 or the second mating member 31, or there may be multiple recesses, and they may be spaced apart along the outer periphery of the receiving space 60.

[0070] This design, which introduces the first main body 22 and the second main body 32, provides a closed housing space 60 for the battery cell 10, which helps to improve the structural stability of the battery device 100.

[0071] Optionally, according to some embodiments of this application, please refer to Figure 5 The recess 40 is arranged around the outer periphery of the receiving space 60.

[0072] It is understood that the portion of the seal 70 in the recess 40 is also arranged around the outer periphery of the receiving space 60. In this way, when the first mating member 21 or the second mating member 31 deforms at any point on the outer periphery of the receiving space 60, the portion of the seal 70 located in the recess 40 can reduce the probability of seal failure between the first mating member 21 and the second mating member 31.

[0073] This design allows the portion of the seal 70 in the recess 40 to also be positioned around the outer periphery of the receiving space 60, further improving the sealing reliability of the battery device 100.

[0074] Optionally, according to some embodiments of this application, please refer to Figure 3 The first body 22 is provided with a first protrusion 221, one end of which extends to the first mating part 21.

[0075] The first protrusion 221 provided on the first body 22 can enhance the overall structural strength of the first body 22. Since the first protrusion 221 extends to the first mating member 21, it can also enhance the structural strength of the first mating member 21 to a certain extent. The first protrusion 221 can protrude towards the receiving space 60 or towards the side away from the receiving space 60. Specifically, in some examples, the first protrusion 221 is formed on the first body 22, and a concave structure is formed on the side of the first protrusion 221 away from the receiving space 60.

[0076] The number of first protrusions 221 can be one or more. When there are multiple first protrusions 221, at least some of the first protrusions 221 are distributed at intervals around the outer periphery of the accommodating space 60.

[0077] This design, which introduces the first protrusion 221, can enhance the structural strength of the first main body 22 and the first mating part 21, and is conducive to improving the reliability of the sealing of the battery device 100.

[0078] Optionally, according to some embodiments of this application, please refer to Figure 3 The second body 32 is provided with a second protrusion 321, one end of which extends to the second mating member 31.

[0079] The second protrusion 321 provided on the second body 32 can enhance the overall structural strength of the second body 32. Since the second protrusion 321 extends to the second mating member 31, it can also enhance the structural strength of the second mating member 31 to a certain extent. The second protrusion 321 can protrude towards the receiving space 60 or towards the side away from the receiving space 60. Specifically, in some examples, the second protrusion 321 is formed on the second body 32, and a concave structure is formed on the side of the second protrusion 321 away from the receiving space 60.

[0080] The number of second protrusions 321 can be one or more. When there are multiple second protrusions 321, at least some of the second protrusions 321 are distributed at intervals around the outer periphery of the receiving space 60.

[0081] This design, which introduces the second protrusion 321, can enhance the structural strength of the second main body 32 and the second mating part 31, and is conducive to improving the reliability of the sealing of the battery device 100.

[0082] Optionally, according to some embodiments of this application, please refer to Figure 4 The dimension of the portion of the first mating part 21 and the second mating part 31 that overlaps in projection along the direction from the end of the first mating part 21 away from the interior of the base 20 to the end of the first mating part 21 away from the interior of the base 20 is denoted as W, where 5mm≤W≤15mm.

[0083] It is understandable that the overlapping portion of the first mating part 21 and the second mating part 31 can be interpreted as the area between the first mating part 21 and the second mating part 31 that can be used for sealing. When the first mating part 21 and the second mating part 31 have the same size and are both square structures, the size W of the overlapping portion between the first mating part 21 and the second mating part 31 can be the width of the first mating part 21 or the second mating part 31.

[0084] If the dimensions of the first mating part 21 and the second mating part 31 are too large, it will increase the space occupied by the battery device 100. Therefore, the dimension W can be controlled between 5mm and 15mm, for example, but not limited to 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 14mm, 15mm, etc.

[0085] This design keeps the size W between 5mm and 15mm, reducing the external space occupied by the battery device 100 while ensuring an effective sealing area.

[0086] According to some embodiments of this application, optionally, the dimension W also satisfies the condition: 6mm≤W≤10mm.

[0087] The size W can be further controlled between 6mm and 10mm, for example, but not limited to 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc.

[0088] This design keeps the size W between 6mm and 10mm, effectively balancing the sealing effect and the external space occupied by the battery device 100.

[0089] Optionally, according to some embodiments of this application, please refer to Figure 6 The thickness of the base 20 is denoted as h1, where 0.8mm≤h1≤2mm.

[0090] The thickness of the base 20 affects the internal space between the base 20 and the cover 30. For example, if the base 20 is designed to be thicker, in order to reduce the external installation space occupied by the battery device 100, the base 20 will thicken the internal space between the base 20 and the cover 30, thus reducing the internal space and resulting in a decrease in the energy density of the battery device 100. Therefore, the thickness h1 is designed to be between 0.8mm and 2mm, such as, but not limited to, 0.8mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, etc., so that the base 20 is relatively thin, which can achieve a higher energy density.

[0091] It is understood that the base 20 includes a first mating part 21, therefore, the thickness of the first mating part 21 is also controlled between 0.8mm and 2mm. Meanwhile, since the base 20 is designed to be relatively thin, its deformation probability is relatively high. Therefore, a sealing element 70 is provided between the first mating part 21 and the second mating part 31, and part of the sealing element 70 is embedded in the recess 40. This effectively meets the sealing requirements of the high energy density battery device 100.

[0092] In addition, it is easy to understand that when the recess 40 is provided on the first mating member 21, the thickness h1 of the base 20 is the thickness of the area of ​​the base 20 other than the recess 40.

[0093] This design controls the thickness h1 between 0.8mm and 2mm, achieving a high energy density for the battery device 100 while ensuring effective sealing.

[0094] Optionally, according to some embodiments of this application, please refer to Figure 7 The thickness of the cover 30 is denoted as h2, where 0.8mm≤h2≤1.6mm.

[0095] The thickness of the cover 30 affects the internal space between the base 20 and the cover 30. For example, if the cover 30 is designed to be thicker, in order to reduce the space occupied by the external installation of the battery device 100, the cover 30 will thicken into the internal space between the base 20 and the cover 30, reducing the internal space and thus reducing the energy density of the battery device 100. Therefore, the thickness h1 is designed to be between 0.8mm and 1.6mm, such as, but not limited to, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, etc., so that the cover 30 is relatively thin, and a higher energy density can be achieved.

[0096] It is understandable that the cover 30 includes a second mating part 31, therefore, the thickness of the second mating part 31 is also controlled between 0.8mm and 1.6mm. Meanwhile, since the cover 30 is designed to be relatively thin, its deformation probability is relatively high. Therefore, a sealing element 70 is provided between the first mating part 21 and the second mating part 31, and part of the sealing element 70 is embedded in the recess 40. This effectively meets the sealing requirements of the high energy density battery device 100.

[0097] Furthermore, it is not difficult to understand that when the recess 40 is provided on the second mating member 31, the thickness h2 of the cover 30 is the thickness of the area of ​​the cover 30 excluding the recess 40.

[0098] This design controls the thickness h2 between 0.8mm and 1.6mm, achieving a high energy density for the battery device 100 while ensuring effective sealing.

[0099] Optionally, according to some embodiments of this application, please refer to Figure 6 The first mating component 21 includes a first substrate 211 and a first coating 212, with the first coating 212 covering the first substrate 211.

[0100] The first substrate 211 refers to the main structure in the first mating component 21, and its material can be various, such as aluminum, steel, composite materials, etc. The first coating 212 refers to the coating applied to the surface of the first substrate 211, which can protect the surface of the first substrate 211 and reduce corrosion or wear. At the same time, the first coating 212 on the first substrate 211 makes it easier for the sealing component 70 to adhere, which helps to improve the adhesion strength of the sealing component 70 and improve the sealing effect.

[0101] It is understandable that the first coating 212 can be a single-layer structure or a multi-layer structure. When the first coating 212 is a multi-layer structure, the materials of each layer can be the same or different.

[0102] In addition, in some embodiments, the structure of the base 20 other than the first mating member 21 may also include a first substrate 211 and a first coating 212. For example, the first body 22 of the base 20 may include a second substrate 311 and a second coating 312.

[0103] This design introduces a first coating 212, which facilitates the protection of the surface of the first mating part 21; at the same time, it also facilitates the bonding of the sealing part 70, improving the sealing effect.

[0104] According to some embodiments of this application, optionally, the material of the first coating 212 is epoxy resin.

[0105] Epoxy resin belongs to epoxy coatings, which generally include oil-based epoxy coatings and water-based epoxy coatings. It has good corrosion resistance and strong adhesion. Therefore, designing the first coating 212 as an epoxy resin-containing structure can improve the corrosion resistance and the adhesion of the seal 70.

[0106] When the seal 70 is also designed to contain epoxy material, the seal 70 and the first coating 212 have good compatibility, increase the chemical bonding between the interfaces, and improve the bonding strength between the seal 70 and the first coating 212.

[0107] This design, which uses epoxy resin as the material for the first coating 212, gives the base 20 good corrosion resistance and strong adhesion.

[0108] Optionally, according to some embodiments of this application, please refer to Figure 6 The first coating 212 includes a first electrophoretic coating 21a and a first spray coating 21b. The first electrophoretic coating 21a is disposed on the surface of the first substrate 211, and the first spray coating 21b is disposed on the surface of the first electrophoretic coating 21a.

[0109] The first electrophoretic coating 21a refers to the coating formed on the first substrate 211 using an electrophoretic process, and the first spray coating 21b refers to the coating formed on the first electrophoretic coating 21a using a spray coating process. It can be understood that during the substrate forming process, the first substrate 211 can undergo an electrophoretic process; after electrophoresis, a spray coating is applied to the surface of the first substrate 211. Both the first electrophoretic coating 21a and the first spray coating 21b can be structures containing epoxy coatings.

[0110] This design, which divides the first coating 212 into a first electrophoretic coating 21a and a first spray coating 21b, is beneficial to improving the corrosion resistance and adhesion performance of the base 20.

[0111] Optionally, according to some embodiments of this application, please refer to Figure 7The second mating component 31 includes a second substrate 311 and a second coating 312, with the second coating 312 covering the second substrate 311.

[0112] The second substrate 311 refers to the main structure in the second mating component 31, and its material can be various, such as aluminum, steel, composite materials, etc. The second coating 312 refers to the coating applied to the surface of the second substrate 311, which can protect the surface of the second substrate 311 and reduce corrosion or wear. At the same time, the second coating 312 on the second substrate 311 makes it easier for the sealing component 70 to adhere, which helps to improve the adhesion strength of the sealing component 70 and improve the sealing effect.

[0113] It is understandable that the second coating 312 can be a single-layer structure or a multi-layer structure. When the second coating 312 is a multi-layer structure, the materials of each layer can be the same or different.

[0114] In addition, in some embodiments, the structure of the cover 30 other than the second mating member 31 may also include the second substrate 311 and the second coating 312. For example, the second body 32 of the cover 30 may include the second substrate 311 and the second coating 312.

[0115] This design introduces a second coating 312, which facilitates the protection of the surface of the second mating part 31; at the same time, it also facilitates the bonding of the sealing part 70, improving the sealing effect.

[0116] According to some embodiments of this application, the second coating 312 may optionally be epoxy resin.

[0117] It is known that epoxy resin generally includes oil-based epoxy coatings and water-based epoxy coatings, which have good corrosion resistance and strong adhesion. Therefore, designing the material of the second coating 312 as epoxy resin can improve the corrosion resistance and the adhesion of the seal 70.

[0118] When the seal 70 is also designed to contain epoxy material, the seal 70 and the second coating 312 have good compatibility, increase the chemical bonding between the interfaces, and improve the adhesion strength between the seal 70 and the second coating 312.

[0119] This design, which uses epoxy resin as the material for the second coating 312, gives the cover 30 good corrosion resistance and strong adhesion.

[0120] Optionally, according to some embodiments of this application, please refer to Figure 7 The second coating 312 includes a second electrophoretic coating 31a and a second spray coating 31b. The second electrophoretic coating 31a is disposed on the surface of the second substrate 311, and the second spray coating 31b is disposed on the surface of the second electrophoretic coating 31a.

[0121] The second electrophoretic coating 31a refers to the coating formed on the second substrate 311 using an electrophoretic process, and the second spray coating 31b refers to the coating formed on the second electrophoretic coating 31a using a spray coating process. It can be seen that during the substrate forming process, the second substrate 311 can undergo an electrophoretic process; after electrophoresis, a spray coating is applied to the surface of the second substrate 311. Both the second electrophoretic coating 31a and the second spray coating 31b can be structures containing epoxy coatings.

[0122] This design, which makes the second coating 312 a second electrophoretic coating 31a and a second spray coating 31b, is beneficial to improving the corrosion resistance and adhesion performance of the cover 30.

[0123] According to some embodiments of this application, optionally, the material of the seal 70 includes component A and component B, where component A includes modified siloxane and component B includes epoxy resin.

[0124] It is known that the material of the seal 70 is a hybrid adhesive of epoxy and modified siloxane, which is a composite material formed by physically mixing hybrid epoxy resin and modified siloxane. The specific materials of the epoxy and modified siloxane hybrid adhesive can be varied, as long as there is a bond between the epoxy resin and the modified siloxane. It should be noted that the material of the seal 70 includes component A and component B, but the ratio and specific composition between component A and component B are not limited and can be determined based on the existing materials of the seal 70. For example, component A may contain 70-90 parts of polyether-modified siloxane, 0.5-2 parts of amine curing agent, 2-4 parts of silane coupling agent, and 5-15 parts of fumed silica; component B may contain 60-80 parts of epoxy resin, 3-10 parts of calcium carbonate, 5-10 parts of water, 0.01-0.05 parts of organotin catalyst, and 5-15 parts of fumed silica. Of course, the material of the seal 70 can also be other conventional epoxy and modified siloxane hybrid adhesives, which will not be described in detail here.

[0125] In some specific examples, the first mating component 21 includes a first coating 212 containing epoxy material, and the second mating component 31 includes a second coating 312 containing epoxy material. By utilizing the compatibility of epoxy, the chemical bonding between the sealant 70 and the first mating component 21 and the second mating component 31 is increased, resulting in good initial wetting and later adhesion. The modified siloxane is a polyether-modified siloxane. The polyether backbone has flexibility and fluidity, which provides better wetting and spreading properties to the substrate.

[0126] This design, using an epoxy and modified siloxane hybrid adhesive, enables the battery device 100 to achieve high adhesion and sealing performance under vibration and shock conditions, while also achieving cohesive failure of the adhesive itself.

[0127] According to some embodiments of this application, the battery device 100 may optionally include a battery cell 10, which is housed between the cover 30 and the base 20.

[0128] In the battery device 100, the battery cell 10 can be directly installed between the cover 30 and the base 20; or it can be assembled into a battery module first, and then installed between the cover 30 and the base 20 in the form of a battery module.

[0129] This design provides a sealed environment for the battery cell 10, achieving an effective sealing effect.

[0130] According to some embodiments of this application, this application provides an electrical device, which includes the battery device 100 of any of the above.

[0131] According to some embodiments of this application, please refer to Figures 3 to 7 This application provides a battery device 100, which includes a battery cell 10, a cover 30, a base 20, and a sealing element 70. The battery cell 10 is housed between the cover 30 and the base 20. The base 20 includes a first mating member 21, and the cover 30 includes a second mating member 31. The first mating member 21 has an annular recess 40. The sealing element 70 is made of a material including component A and component B. Component A includes polyether-modified siloxane, and component B includes epoxy resin. It is bonded between the first mating member 21 and the second mating member 31, and a portion of it is embedded in the recess 40.

[0132] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0133] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, The battery device includes: The base (20) includes a first mating part (21); A cover (30) is provided on the base (20) and includes a second fitting (31) that fits with the first fitting (21), wherein the thickness of the base (20) and / or the cover (30) is 0.8 mm to 2 mm. A sealing element (70) is bonded between the first mating element (21) and the second mating element (31); Among them, at least one of the two sides of the first mating member (21) and the second mating member (31) facing each other is provided with a recess (40), and the sealing member (70) is partially disposed in the recess (40).

2. The battery device according to claim 1, characterized in that, The depth of the recess (40) is denoted as h0, where 0.4mm≤h0≤0.6mm.

3. The battery device according to claim 1, characterized in that, The battery device includes a fastener (50) for securing the first mating member (21) and the second mating member (31).

4. The battery device according to claim 3, characterized in that, The recess (40) is located on the side of the fastener (50) facing the interior of the base (20).

5. The battery device according to claim 1, characterized in that, The base (20) further includes a first body (22), and the cover (30) further includes a second body (32). The first mating member (21) is arranged around the outer periphery of the first body (22), and the second mating member (31) is arranged around the outer periphery of the second body (32). An accommodating space (60) is formed between the first body (22) and the second body (32).

6. The battery device according to claim 5, characterized in that, The recess (40) is arranged around the outer periphery of the receiving space (60).

7. The battery device according to claim 5, characterized in that, The first body (22) is provided with a first protrusion (221), one end of which extends to the first mating member (21); and / or, The second body (32) is provided with a second protrusion (321), one end of which extends to the second mating member (31).

8. The battery device according to claim 1, characterized in that, The dimension of the portion of the first mating part (21) and the second mating part (31) that overlaps in projection along the direction from one end of the first mating part (21) away from the interior of the base (20) to one end of the first mating part (21) away from the interior of the base (20) is denoted as W, where 5mm≤W≤15mm.

9. The battery device according to claim 8, characterized in that, The dimension W also satisfies the condition that 6mm ≤ W ≤ 10mm.

10. The battery device according to claim 1, characterized in that, The thickness of the cover (30) is denoted as h2, where 0.8mm≤h2≤1.6mm.

11. The battery device according to any one of claims 1-10, characterized in that, The first mating component (21) includes a first substrate (211) and a first coating (212), wherein the first coating (212) covers the first substrate (211).

12. The battery device according to claim 11, characterized in that, The material of the first coating (212) is epoxy resin; and / or, The first coating (212) includes a first electrophoretic coating (21a) and a first spray coating (21b). The first electrophoretic coating (21a) is disposed on the surface of the first substrate (211), and the first spray coating (21b) is disposed on the surface of the first electrophoretic coating (21a).

13. The battery device according to any one of claims 1-10, characterized in that, The second mating component (31) includes a second substrate (311) and a second coating (312), wherein the second coating (312) covers the second substrate (311).

14. The battery device according to claim 13, characterized in that, The material of the second coating (312) is epoxy resin; and / or, The second coating (312) includes a second electrophoretic coating (31a) and a second spray coating (31b), wherein the second electrophoretic coating (31a) is disposed on the surface of the second substrate (311) and the second spray coating (31b) is disposed on the surface of the second electrophoretic coating (31a).

15. The battery device according to any one of claims 1-10, characterized in that, The material of the seal (70) includes component A and component B, component A includes modified siloxane and component B includes epoxy resin.

16. The battery device according to any one of claims 1-10, characterized in that, The battery device also includes a battery cell (10) which is housed between the cover (30) and the base (20).

17. An electrical appliance, characterized in that, The electrical equipment includes the battery device according to any one of claims 1-16.

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