Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a box body, a battery monomer, a protection plate and a first fastener. The battery monomer is arranged in the box body. The protection plate is arranged at the bottom of the battery monomer, and at least one side of the protection plate along the thickness direction of the protection plate is a fiber resin layer. The first fastener is used for locking the protection plate to the box body, and a part of the protection plate is clamped between the box body and the first fastener along the thickness direction of the protection plate. Wherein, along the thickness direction of the protection plate, a support is further arranged between the box body and the first fastener, and the orthographic projection of the support and the orthographic projection of the protection plate at least partially do not overlap in the same projection plane perpendicular to the thickness direction of the protection plate. The battery device has higher reliability.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202520547455.9, filed on March 26, 2025, entitled “Battery Device and Power Consumption Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, specifically to a battery device and an electrical device. Background Technology

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0005] Improving the reliability of battery devices is a pressing issue in battery technology. Utility Model Content

[0006] In view of the above problems, this application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0007] In a first aspect, this application provides a battery device, comprising a housing, a battery cell, a protective plate, and a first fastener. The battery cell is disposed within the housing. The protective plate is disposed at the bottom of the battery cell, and at least one side of the protective plate along its thickness direction is a fiber resin layer. The first fastener is used to lock the protective plate to the housing, and a portion of the protective plate is clamped between the housing and the first fastener along the thickness direction of the protective plate. A support member is further disposed between the housing and the first fastener along the thickness direction of the protective plate, and in the same projection plane perpendicular to the thickness direction of the protective plate, the orthographic projection of the support member and the orthographic projection of the protective plate at least partially do not overlap.

[0008] In the technical solution of this application embodiment, the support member is disposed between the housing and the first fastener along the thickness direction of the protective plate, and its orthographic projection does not overlap with the orthographic projection of the protective plate at least partially in the same projection plane perpendicular to the thickness direction of the protective plate. This arrangement allows for mechanical adjustment without affecting the overall compactness of the electrical device structure. When the locking force of the first fastener is transmitted to the protective plate, the support member can limit the deformation of the fiber resin layer under compression, reducing the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer. It also reduces the risk of loss of protective function due to crushing of the fiber resin layer, thereby improving the reliability of the electrical device.

[0009] In one or more embodiments of the first aspect, the orthographic projection of the support member does not overlap with the orthographic projection of the protective plate in the same projection plane perpendicular to the thickness direction of the protective plate.

[0010] In the above scheme, the support member is positioned between the housing and the first fastener along the thickness direction of the protective plate, and its orthographic projection lies on the same projection plane perpendicular to the thickness direction of the protective plate, without overlapping with the orthographic projection of the protective plate. This arrangement allows for mechanical adjustment without affecting the overall compactness of the electrical device. When the locking force of the first fastener is transmitted to the protective plate, the support member can limit the deformation of the fiber resin layer under compression, reducing the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer. It also reduces the risk of loss of protective function due to crushing of the fiber resin layer, thereby improving the reliability of the electrical device.

[0011] In one or more embodiments of the first aspect, the battery device further includes a second fastener, which is fixed to the housing and is threadedly connected to the first fastener.

[0012] In the above solution, the protective plate is secured to the enclosure by a second fastener threadedly connected to the first fastener. This approach reduces the risk of excessive deformation caused by localized stress concentration within the enclosure. Furthermore, it eliminates the need for high-precision thread machining within the enclosure during manufacturing, improving the processing efficiency of the electrical equipment. Additionally, it reduces the risk of the entire enclosure being scrapped due to thread failure, thus lowering maintenance costs. Moreover, the two fasteners work synergistically to reduce the preload required for securing the protective plate, further mitigating the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer, and further reducing the risk of loss of protective function due to fiber resin layer collapse.

[0013] In one or more embodiments of the first aspect, the support member is disposed between the first fastener and the second fastener along the thickness direction of the protective plate.

[0014] In the above scheme, since the locking force between the first fastener and the second fastener is relatively large, placing the support between the first fastener and the second fastener can limit the deformation of the fiber resin layer in the area with large locking force, thereby further reducing the risk of damage to the fiber resin layer.

[0015] In one or more embodiments of the first aspect, the housing includes a frame and a beam, the beam being disposed within and connected to the frame. A first fastener includes a nut, and a second fastener includes a first sleeve, at least a portion of which is disposed within the beam. The nut is fitted onto the outer periphery of the first sleeve and threadedly connected to it. A support member includes a first support member disposed between the nut and the first sleeve.

[0016] In the above solution, by fitting the nut onto the outer circumference of the first sleeve and locking the protective plate in conjunction with the sleeve, the internal space of the sleeve can be fully utilized for subsequent assembly steps such as mounting the housing, thus expanding the functions of the first and second fasteners. This reduces the number of sealing operations during the assembly process, lowering the risk of housing seal failure.

[0017] In one or more embodiments of the first aspect, along the thickness direction of the protective plate, the protective plate has a first surface and a second surface disposed opposite to each other, the protective plate has a first through hole that penetrates the first surface and the second surface, and a first support member is disposed in the first through hole.

[0018] In the above solution, the first support member can utilize the space inside the first through hole, making the electrical device more compact and enabling the battery device to have a higher energy density. Furthermore, the first through hole can simultaneously serve as an assembly reference for the first fastener, the second fastener, and the support member, which helps improve assembly efficiency.

[0019] In one or more embodiments of the first aspect, the protective plate includes a first fiber resin layer, a reinforcing layer, and a second fiber resin layer stacked sequentially along its thickness direction, and a first edge sealing portion; along the thickness direction of the protective plate, the surface of the first fiber resin layer facing away from the reinforcing layer is a first surface, and the surface of the second fiber resin layer facing away from the reinforcing layer is a second surface; the reinforcing layer has a second through hole surrounding the first through hole, the first edge sealing portion is annular, the outer peripheral surface of the first edge sealing portion is connected to the inner peripheral surface of the second through hole and connects the first fiber resin layer and the second fiber resin layer, and a first support member passes through the first edge sealing portion.

[0020] In the above solution, the first edge sealing portion can reduce the risk of the exposed reinforcement layer being corroded or damaged. Since the first support member passes through the first edge sealing portion, when the locking force of the first fastener is transmitted to the protective plate, the first support member can limit the deformation of the first edge sealing portion under compression, reduce the risk of the first edge sealing portion being crushed and losing its protective function, and thus improve the reliability of the electrical device.

[0021] In one or more embodiments of the first aspect, the material of the first sealing portion includes resin or fiber resin.

[0022] In one or more embodiments of the first aspect, the first support member is integrally formed with the nut.

[0023] In the above solution, the one-piece molded first support and nut simplify the assembly process and improve assembly efficiency. It also reduces the risk of excessive displacement of the first support during assembly, which could damage the fiber resin layer.

[0024] In one or more embodiments of the first aspect, the first support member is annular, and the inner diameter of the first support member is larger than the inner diameter of the nut.

[0025] In the above solution, since the inner diameter of the first support member is larger than the inner diameter of the nut, the shape consistency of the thread termination can be improved, and the machining accuracy of the thread can be increased. This reduces the risk of assembly gaps caused by low thread machining accuracy.

[0026] In one or more embodiments of the first aspect, the first sleeve includes a cylinder and a flange portion, the flange portion protruding from the outer peripheral surface of the cylinder, and along the thickness direction of the protective plate, a portion of the protective plate and the first support member are located between the flange portion and the nut.

[0027] In the above scheme, during the locking process of the protective plate, the locking force between the flange and the nut is relatively large. The flange and nut compress the protective plate, which poses a high risk of damage to the fiber resin layer. By placing the first support between the flange and the nut, the deformation of the fiber resin layer under compression can be limited in the area with large locking force, thereby further reducing the risk of damage to the fiber resin layer.

[0028] In one or more embodiments of the first aspect, the battery device further includes a first seal, the first seal being annular and disposed between the flange and the protective plate.

[0029] In the above scheme, the installation of the first sealing element can improve the sealing performance between the flange and the protective plate.

[0030] In one or more embodiments of the first aspect, the flange portion has a first end face facing the protective plate, the first end face is provided with a first groove, and a first sealing element is disposed in the first groove.

[0031] In the above scheme, the first groove can limit the deformation of the first seal, which is beneficial to ensure that the first seal has sufficient compression after assembly, so as to achieve a high sealing performance between the flange and the protective plate.

[0032] In one or more embodiments of the first aspect, the first groove extends to the outer peripheral surface of the flange.

[0033] In the above solution, since the first groove extends to the outer circumferential surface of the flange, it can have a larger accommodating space to house the first seal, which is beneficial for arranging a wider first seal, thereby further improving the sealing performance between the flange and the protective plate. When the first seal is located between the fiber resin layer and the flange, the wider sealing width of the first seal can significantly reduce the risk of seal failure caused by the high surface roughness of the fiber resin layer.

[0034] In one or more embodiments of the first aspect, the depth of the first groove is H, satisfying: 1mm≤H≤3mm.

[0035] In the above scheme, when H≥1mm, the first groove has a large depth, which can reduce the risk of the first seal being damaged due to excessive compression; when H≤3mm, the depth of the first groove is small, which can reduce the risk of the first seal failing due to insufficient compression deformation; therefore, when 1mm≤H≤3mm, the risk of the first seal being damaged due to excessive compression can be reduced, while also reducing the risk of the first seal failing due to insufficient compression deformation.

[0036] In one or more embodiments of the first aspect, the outer diameter of the first seal is D1, and the inner diameter of the first seal is D2, satisfying:

[0037]

[0038] In the above scheme, when When this is done, the first sealing element can have a higher sealing width, improving the sealing performance between the flange and the protective plate; when When this is done, the friction area of ​​the first seal can be reduced, thus reducing the risk of fatigue failure of the first seal; therefore, when At the same time, while improving the sealing performance between the flange and the protective plate, it can also reduce the friction area of ​​the first seal and reduce the risk of fatigue failure of the first seal.

[0039] In one or more embodiments of the first aspect, the first seal has a third surface that contacts the flange and a fourth surface that contacts the protective plate, wherein both the third and fourth surfaces are planar when the first seal is in its natural state.

[0040] In the above solution, since the third and fourth surfaces are both planar when the first seal is in its natural state, the pressure required for the sealing surface of the first seal to have sufficient fit can be reduced, thereby reducing the risk of the fiber resin layer being over-compressed and damaged when excessive force is transmitted to the protective plate.

[0041] In one or more embodiments of the first aspect, the compression ratio of the first seal is Yb, satisfying: 30% ≤ Yb ≤ 70%.

[0042] In the above scheme, when Yb≥30%, the fit of the first seal is high, and the sealing performance between the flange and the protective plate is good; when Yb≤70%, the risk of the first seal being crushed can be reduced; therefore, when 30%≤Yb≤70%, while ensuring good sealing between the flange and the protective plate, the risk of the first seal being crushed can also be reduced. In one or more embodiments of the first aspect, the housing further includes a thermal management component for supporting the battery cell. Along the thickness direction of the protective plate, the protective plate is located on the side of the thermal management component away from the battery cell, and the flange is located between the protective plate and the thermal management component. The battery device further includes a second seal, which is annular and disposed between the flange and the thermal management component. The inner diameter of the first seal is larger than the outer diameter of the second seal.

[0043] In the above scheme, the second seal improves the sealing performance between the flange and the thermal management components. Since the inner diameter of the first seal is larger than the outer diameter of the second seal, and the first seal is further away from the first fastener, the sealing width of the first seal can be set larger, which further improves the sealing performance between the flange and the protective plate. Especially under the premise that the orthographic projections of the first and second seals do not overlap along the thickness direction of the protective plate, this arrangement allows the sealing width of the first seal to be set as large as possible.

[0044] In one or more embodiments of the first aspect, along the thickness direction of the protective plate, neither the nut nor the first sleeve extends beyond the surface of the protective plate away from the battery cell.

[0045] In the above scheme, since the nut and the first sleeve do not extend beyond the surface of the protective plate away from the battery cell along the thickness direction of the protective plate, the risk of the nut and the first sleeve failing to lock due to external force is low.

[0046] In one or more embodiments of the first aspect, the housing includes a frame; the protective plate includes a body and a flange, the flange surrounding the body; the first fastener includes a first screw that connects the flange to the frame; and the support includes a second support disposed between the flange and the frame.

[0047] In the above scheme, when the locking force of the first screw is transmitted to the protective plate, the second support can limit the deformation of the fiber resin layer under compression, reduce the risk of matrix cracking or fiber breakage caused by excessive compression of the fiber resin layer, and at the same time reduce the risk of loss of protective function of the protective plate due to crushing of the fiber resin layer, thereby improving the reliability of the battery device.

[0048] In one or more embodiments of the first aspect, the first screw includes a nut and a screw rod, and the second support is sleeved on the outer periphery of the screw rod. Along the thickness direction of the protective plate, the second support is located between the nut and the frame.

[0049] In the above solution, during the locking process of the protective plate, the locking force between the nut and the frame is relatively large. The nut and the frame compress the protective plate, which poses a high risk of damage to the fiber resin layer. By placing the second support between the nut and the frame, the deformation of the fiber resin layer under compression can be limited in the area with large locking force, thereby further reducing the risk of damage to the fiber resin layer.

[0050] In one or more embodiments of the first aspect, along the thickness direction of the protective plate, the protective plate has a first surface and a second surface disposed opposite to each other, the protective plate has a third through hole that penetrates the first surface and the second surface, and a second support member is disposed in the third through hole.

[0051] In the above scheme, the second support member can utilize the space inside the third through hole, making the electrical device more compact and enabling the battery device to have a higher energy density. Furthermore, the third through hole can simultaneously serve as an assembly reference for the first fastener, the second fastener, and the second support member, which helps improve the assembly efficiency of the battery device.

[0052] In one or more embodiments of the first aspect, the second support member is an open ring.

[0053] In the above scheme, since the second support member is an open ring with a flexible structure, the open ring can expand or contract during the tightening process of the first screw, dispersing a certain amount of the locking force, thereby further reducing the risk of damage to the fiber resin layer.

[0054] In one or more embodiments of the first aspect, the thickness of the opening ring is greater than the thickness of the protective plate in the thickness direction of the protective plate.

[0055] In the above solution, since the thickness of the open ring is greater than the thickness of the protective plate, the risk of damage to the fiber resin layer can be further reduced.

[0056] In one or more embodiments of the first aspect, the battery device further includes a third seal disposed between the flange edge and the housing.

[0057] In the above scheme, the addition of a third sealing element can improve the sealing performance between the flange edge and the housing.

[0058] In one or more embodiments of the first aspect, a plurality of third through holes are provided, and the plurality of third through holes are spaced apart circumferentially along the flange edge, and the distance between two adjacent third through holes is L1, satisfying: 70mm≤L1≤90mm.

[0059] In the above scheme, when L1≥70mm, the distance between two adjacent third through holes is larger, which can reduce the risk of the third seal being crushed due to excessive compressive stress; when L1≤90mm, the distance between two adjacent third through holes is smaller, which can reduce the risk of the third seal lifting and causing seal failure; therefore, when 70mm≤L1≤90mm, while reducing the risk of the third seal being crushed due to excessive compressive stress, it can also reduce the risk of the third seal lifting and causing seal failure.

[0060] In one or more embodiments of the first aspect, the flange edge includes adjacent first sub-flange edges and second sub-flange edges, the first sub-flange edge having a first outer edge and the second sub-flange edge having a second outer edge; multiple third through holes are provided, the multiple third through holes including multiple first sub-through holes provided on the first sub-flange edge and multiple second sub-through holes provided on the second sub-flange edge; the distance between the first sub-through hole closest to the second outer edge and the second outer edge is L2, satisfying: 20mm≤L2≤35mm; the distance between the second sub-through hole closest to the first outer edge and the first outer edge is L3, satisfying: 20mm≤L3≤35mm.

[0061] In the above scheme, when L2≥20mm, the distance between the one closest to the second outer edge among the multiple first sub-through holes and the second outer edge is relatively large, which allows for the placement of a third seal with a larger area between the one closest to the second outer edge among the multiple first sub-through holes and the second outer edge, reducing the risk of the third seal being crushed after locking due to its small area. When L2≤35mm, the distance between the one closest to the second outer edge among the multiple first sub-through holes and the second outer edge is relatively small, which reduces the risk of the third seal with a large area between the one closest to the second outer edge among the multiple first sub-through holes lifting up. Therefore, when 20mm≤L2≤35mm, while reducing the risk of the third seal being crushed after locking due to its small area, it also reduces the risk of the third seal with a large area between the one closest to the second outer edge among the multiple first sub-through holes lifting up.

[0062] When L3 ≥ 20mm, the distance between the second sub-through hole closest to the first outer edge and the first outer edge is relatively large, allowing for a larger third seal area to be arranged between the second sub-through hole and the first outer edge, reducing the risk of the third seal being crushed after locking due to its small area. When L2 ≤ 35mm, the distance between the second sub-through hole closest to the first outer edge and the first outer edge is relatively small, reducing the risk of the third seal being warped due to its large area. Therefore, when 20mm ≤ L2 ≤ 35mm, while reducing the risk of the third seal being crushed after locking due to its small area, it also reduces the risk of the third seal being warped due to its large area between the second sub-through hole and the first outer edge.

[0063] In one or more embodiments of the first aspect, the third seal is annular and has a third through hole through which the first screw passes. The minimum distance between the third through hole and the inner circumferential surface of the third seal is W, which satisfies: 7mm≤W≤10mm.

[0064] In the above scheme, when W≥7mm, the third seal has a larger sealing width, which can reduce the risk of seal failure; when W≤10mm, the third seal occupies less space, which is beneficial to enable the battery device to have a higher energy density; therefore, when 7mm≤W≤10mm, the battery device can achieve both high sealing and high energy density.

[0065] In one or more embodiments of the first aspect, the first fastener includes a first screw, the battery device further includes a second fastener including a threaded sleeve that is threadedly connected to the first screw, and at least a portion of the threaded sleeve is disposed within a frame; the support includes a second support disposed between the first screw and the threaded sleeve.

[0066] In the above solution, by using a threaded sleeve at least partially located within the frame to engage with the first screw to lock the protective plate, the locking force can be transmitted more evenly to the frame through the threaded sleeve, reducing the risk of locking failure due to stress concentration.

[0067] In one or more embodiments of the first aspect, the protective plate includes a first fiber resin layer, a reinforcing layer and a second fiber resin layer stacked sequentially along its thickness direction, and a second edge sealing portion; the reinforcing layer has a fifth surface and a sixth surface opposite to each other along its thickness direction and an outer peripheral surface connecting the fifth surface and the sixth surface, the second edge sealing portion covers the outer peripheral surface of the reinforcing layer and connects the first fiber resin layer and the second fiber resin layer, and a second support member passes through the second edge sealing portion.

[0068] In the above solution, the second edge sealing portion can reduce the risk of the exposed reinforcement layer being corroded or damaged. Since the second support member passes through the second edge sealing portion, when the locking force of the first fastener is transmitted to the protective plate, the second support member can limit the deformation of the second edge sealing portion under compression, reduce the risk of the second edge sealing portion being crushed and losing its protective function, and thus improve the reliability of the battery device.

[0069] In one or more embodiments of the first aspect, the material of the second sealing portion includes resin or fiber resin.

[0070] In one or more embodiments of the first aspect, the reinforcing layer is made of at least one of steel, titanium, ceramic, and high-strength plastic.

[0071] In one or more embodiments of the first aspect, the housing includes a frame and a beam, the beam being disposed within and connected to the frame; the protective plate includes a body and a flange, the flange surrounding the body; the first fastener includes a nut and a first screw; the battery device further includes a second fastener, the second fastener including a first sleeve and a threaded sleeve; at least a portion of the first sleeve is disposed within the beam, the nut is sleeved on the outer periphery of the first sleeve and threadedly connected to the first sleeve; at least a portion of the threaded sleeve is disposed within the frame, the threaded sleeve being threadedly connected to the first screw; the support includes a first support and a second support, the first support being disposed between the nut and the first sleeve, and the second support being disposed between the flange and the frame.

[0072] In the above solution, when the locking force of the nut is transmitted to the protective plate, and when the locking force of the first screw is transmitted to the protective plate, the first support member and the second support member can limit the deformation of the fiber resin layer under compression, reducing the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer. Simultaneously, it can also reduce the risk of loss of the protective function of the protective plate due to crushing of the fiber resin layer, thereby improving the reliability of the battery device. Secondly, this application provides an electrical device including the battery device of one or more of the above embodiments, the battery device being used to provide electrical energy.

[0073] In the above solutions, since the battery device in one or more of the above embodiments has high reliability, the power supply device including the battery device in one or more of the above embodiments also has high reliability.

[0074] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0075] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0076] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0077] Figure 2 Exploded views of battery devices according to some embodiments of this application;

[0078] Figure 3 This is a schematic diagram of the structure of the protective plate according to some embodiments of this application;

[0079] Figure 4 Exploded views of protective plates according to some embodiments of this application;

[0080] Figure 5 This is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of this application;

[0081] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0082] Figure 7 This is a schematic diagram of the structure of a second fastener according to some embodiments of this application;

[0083] Figure 8 This is a schematic diagram of the structure of a first fastener according to some embodiments of this application;

[0084] Figure 9 This is a cross-sectional view of a thermal management component according to some embodiments of this application;

[0085] Figure 10 This is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of this application;

[0086] Figure 11 for Figure 10 A magnified view of a section at point B in the middle;

[0087] Figure 12 This is a cross-sectional view of a portion of the structure of a battery device according to other embodiments of this application;

[0088] Figure 13 for Figure 12 A magnified view of a section at point C;

[0089] Figure 14 for Figure 4 A magnified view of a section at point D;

[0090] Figure 15 for Figure 3 A magnified view of a section at point E in the middle;

[0091] Figure 16 for Figure 3 A magnified view of a section at point F in the middle;

[0092] Figure 17 This is a schematic diagram of a portion of the structure of a battery device according to other embodiments of this application;

[0093] Figure 18 This is a schematic diagram of a portion of the structure of a battery device according to some embodiments of this application;

[0094] Figure 19 This is a schematic diagram of a portion of the structure of a battery device according to other embodiments of this application;

[0095] Figure 20 This is a schematic diagram of a portion of the structure of a battery device according to some embodiments of this application.

[0096] The reference numerals in the detailed embodiments are as follows:

[0097] 1000 - Vehicle; 200 - Controller; 300 - Motor; 100 - Battery Unit; 11 - Housing; 111 - First Housing; 112 - Second Housing; 113 - Frame; 114 - Beam; 12 - Battery Cell; 13 - Protective Plate; 131 - First Fiber Resin Layer; 132 - Second Fiber Resin Layer; 133 - Intermediate Layer; 134 - First Surface; 135 - Second Surface; 136 - First Through Hole; 137 - Body; 138 - Flange Edge; 1381 - First Sub-Flange Edge; 1381a - First Outer Edge; 1382 - Second Sub-Flange Edge; 1382a - Second Outer Edge; 139 - Third Through Hole; 1391 - First Sub-Through Hole; 1392 - Second Sub-Through Hole; 1311 - First Sealing Edge; 1312 - ... Second sealing part; 14-First fastener; 141-Nut; 142-First screw; 1421-Nut; 1422-Screw; 143-Second screw; 15-Support member; 1501-Support part; 1502-Protrusion; 151-First support member; 152-Second support member; 16-Second fastener; 161-First sleeve; 1612-Cylinder body; 1613-Flange part; 1613a-First end face; 1613b-First groove; 162-Threaded sleeve; 17-First seal; 171-Third surface; 172-Fourth surface; 18-Thermal management component; 181-First plate; 182-Second plate; 19-Second seal; 20-Second sleeve; 21-Third seal; X-Thickness direction of protective plate. Detailed Implementation

[0098] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0099] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0100] In the description of the embodiments of this application, technical terms such as "first" and "second" 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.

[0101] 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.

[0102] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0103] 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.

[0104] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0105] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. 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, reduces the risk of short circuits while allowing active ions to pass through.

[0106] In some embodiments, the separator is a separator membrane. The separator membrane can be any known porous structure separator membrane with good chemical and mechanical stability.

[0107] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0108] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0109] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0110] In some implementations, the electrode assembly is a stacked structure.

[0111] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0112] 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.

[0113] As an example, a 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 battery cells, such as hexagonal prismatic battery cells.

[0114] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0115] The battery apparatus 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.

[0116] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; 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 a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0117] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0118] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0119] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0120] 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.

[0121] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0122] The following discussion will primarily focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable in some respects to cylindrical battery cells, pouch cell cells, or blade cell cells.

[0123] In a typical battery cell structure, a battery cell includes a casing, electrode assemblies, and electrolyte. The casing includes end caps and a housing; the end caps close the opening of the housing to define a space for accommodating the electrode assemblies. In some embodiments, the casing can 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.

[0124] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, the reliability of the battery device also needs to be considered.

[0125] Common battery packs typically consist of a housing and a protective panel, with the panel sealing an opening in the housing. The primary function of this protective panel is to prevent impact and scratches from gravel, while also effectively reducing the risk of rainwater, mud, dust, and other external substances entering the housing, thus lowering the risk of short circuits or electrochemical corrosion. Some battery packs incorporate a fiber resin layer in their protective panels, which possesses excellent abrasion and corrosion resistance. However, during the fastening process, excessive preload can over-compress the fiber resin layer, potentially leading to matrix cracking, fiber breakage, and in severe cases, even crushing of the fiber resin layer, rendering the protective panel ineffective. Therefore, these battery packs exhibit certain reliability deficiencies.

[0126] In view of this, this application provides a battery device, which includes a housing, a battery cell, a protective plate, and a first fastener. The battery cell is disposed within the housing. The protective plate is disposed at the bottom of the battery cell, and at least one side of the protective plate along its thickness direction is a fiber resin layer. The first fastener is used to lock the protective plate to the housing, and a portion of the protective plate is clamped between the housing and the first fastener along its thickness direction. A support member is also disposed between the housing and the first fastener along the thickness direction of the protective plate, and the orthographic projection of the support member does not at least partially overlap with the orthographic projection of the protective plate in the same projection plane perpendicular to the thickness direction of the protective plate. The support member is disposed between the housing and the first fastener along the thickness direction of the protective plate, and its orthographic projection does not at least partially overlap with the orthographic projection of the protective plate in the same projection plane perpendicular to the thickness direction of the protective plate. This arrangement provides a mechanical adjustment function without affecting the overall compactness of the electrical device structure. When the locking force of the first fastener is transmitted to the protective plate, the support can limit the deformation of the fiber resin layer under compression, reduce the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer, and at the same time reduce the risk of loss of protective function of the protective plate due to crushing of the fiber resin layer, thereby improving the reliability of the electrical device.

[0127] The technical solutions described in the embodiments of this application are applicable to battery cells, battery devices, and electrical devices using battery devices.

[0128] Electrical devices include, but are not limited to: electric vehicles, electric cars, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0129] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0130] For example, Figure 1This is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 may have a motor 300, a controller 200, and a battery device 100 installed inside. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed 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's electrical system, such as for the power requirements of starting, navigation, and operation of the vehicle 1000. In another embodiment 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, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0131] To meet different power demands, the battery device 100 may include multiple battery cells 12, which can be connected in series, parallel, or in a mixed configuration. The battery device 100 may also be referred to as a battery pack. Optionally, the multiple battery cells 12 can first be connected in series, parallel, or in a mixed configuration to form a battery cell assembly, and then the battery cell assemblies can be connected in series, parallel, or in a mixed configuration to form the battery device 100. That is, the multiple battery cells 12 can directly form the battery device 100, or they can first be assembled into battery cell assemblies, and then the battery cell assemblies can be assembled into the battery device 100.

[0132] For example, please refer to Figure 2 , Figure 2 The image shown is an exploded view of a battery device 100 according to some embodiments of this application. The battery device 100 may include a plurality of battery cells 12. The battery device 100 may also include a housing 11, which has a hollow interior structure, and the plurality of battery cells 12 are housed within the housing 11. Figure 2As shown, these are referred to as the first housing 111 and the second housing 112, respectively, and are fastened together. The shapes of the first housing 111 and the second housing 112 can be determined according to the combined shape of multiple battery cells 12. Both the first housing 111 and the second housing 112 may have an open surface. For example, both the first housing 111 and the second housing 112 can be hollow cuboids with only one open surface each. The open surfaces of the first housing 111 and the second housing 112 are arranged opposite to each other, and the first housing 111 and the second housing 112 are fastened together to form a housing 11 with a closed cavity. Multiple battery cells 12 are connected in parallel, series, or mixed configurations and placed inside the housing 11 formed by the fastening of the first housing 111 and the second housing 112.

[0133] Optionally, the battery device 100 may also include other structures, which will not be described in detail here. For example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 12, such as in parallel, series, or mixed connection. Specifically, the busbar component can realize electrical connection between battery cells 12 by connecting the electrode terminals of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals of the battery cells 12 by welding. The electrical energy of the multiple battery cells 12 can be further led out through the housing 11 via a conductive mechanism.

[0134] The number of battery cells 12 can be set to any value depending on different power requirements. Multiple battery cells 12 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 100 may include a large number of battery cells 12, for ease of installation, the battery cells 12 can be grouped, with each group of battery cells 12 forming a battery cell 12 assembly. The number of battery cells 12 included in a battery cell 12 assembly is unlimited and can be set according to requirements. The battery device 100 may include multiple battery cell assemblies, which can be connected in series, parallel, or mixed connection.

[0135] According to some embodiments of this application, please refer to Figures 3-6This application provides a battery device 100, which includes a housing 11, a battery cell 12, a protective plate 13, and a first fastener 14. The battery cell 12 is disposed inside the housing 11. The protective plate 13 is disposed at the bottom of the battery cell 12, and at least one side of the protective plate 13 along its thickness direction is a fiber resin layer. The first fastener 14 is used to lock the protective plate 13 to the housing 11, and a portion of the protective plate 13 is clamped between the housing 11 and the first fastener 14 along the thickness direction X of the protective plate. A support member 15 is also provided between the housing 11 and the first fastener 14 along the thickness direction X of the protective plate, and the orthographic projection of the support member 15 and the orthographic projection of the protective plate 13 do not overlap at least partially in the same projection plane perpendicular to the thickness direction X of the protective plate.

[0136] In some embodiments, taking a vehicle 1000 as an example, the bottom of the battery cell 12 may refer to the side of the housing 11 closest to the ground after the battery device 100 is installed in the vehicle 1000.

[0137] In some embodiments, a protective plate 13 is disposed at the bottom of the battery cell 12, and the protective plate 13 is used to support the battery cell 12.

[0138] In some embodiments, a protective plate 13 is disposed at the bottom of the battery cell 12, and a support plate is further disposed between the protective plate 13 and the battery cell 12, the support plate being used to support the battery cell 12. In other embodiments, the support plate may be a thermal management component 18.

[0139] The protective plate 13 has at least one fiber resin layer along its thickness direction, meaning that the protective plate 13 has fiber resin layers on one or both sides along its thickness direction. When the protective plate 13 is entirely made of fiber resin material, it can also be understood that at least one side of the protective plate 13 along its thickness direction is a fiber resin layer. Of course, in some embodiments, along the thickness direction X of the protective plate, the protective plate 13 includes a first fiber resin layer 131, an intermediate layer 133, and a second fiber resin layer 132 stacked along its thickness direction; such a protective plate 13 can also be understood as having at least one fiber resin layer along its thickness direction. Furthermore, the protective plate 13 includes a first fiber resin layer 131 and a reinforcing layer stacked along its thickness direction, with the first fiber resin layer 131 located between the reinforcing layer and the battery cell 12; or the protective plate 13 includes a reinforcing layer and a second fiber resin layer 132 stacked along its thickness direction, with the second fiber resin layer 132 located on the side of the reinforcing layer facing away from the battery cell 12; such a protective plate 13 can also be understood as having at least one fiber resin layer along its thickness direction. The intermediate layer 133 may include a reinforcing layer and a buffer layer. The reinforcing layer has a first surface 134 and a second surface 135 disposed opposite to each other along its thickness direction, and at least a portion of the first surface 134 and at least a portion of the second surface 135 are connected to the buffer layer. The intermediate layer 133 may include a buffer layer and a reinforcing layer. The two sides of the reinforcing layer are respectively connected to the first fiber resin layer 131 and the second fiber resin layer 132. The buffer layer has an upper surface and a lower surface opposite to each other. The upper surface is connected to the first fiber resin layer 131, and / or the lower surface is connected to the second fiber resin layer 132. The intermediate layer 133 may include a buffer layer and a reinforcing layer. The reinforcing layer includes a first connecting portion and a second connecting portion. The first connecting portion is connected to both the first fiber resin layer 131 and the second fiber resin layer 132, and the second connecting portion is connected to one of the first fiber resin layer 131 and the second fiber resin layer 132. Along the thickness direction X of the protective plate, the buffer layer has an upper surface and a lower surface disposed opposite to each other. The upper surface is connected to the first fiber resin layer 131, and / or the lower surface is connected to the second fiber resin layer 132.

[0140] In some embodiments, the first fiber resin layer 131 is independently selected from glass fiber reinforced polyamide resin, glass fiber reinforced polypropylene resin, glass fiber reinforced polyethylene resin, glass fiber reinforced polycarbonate resin, or glass fiber reinforced polystyrene resin; and / or, the second fiber resin layer 132 is independently selected from glass fiber reinforced polyamide resin, glass fiber reinforced polypropylene resin, glass fiber reinforced polyethylene resin, glass fiber reinforced polycarbonate resin, or glass fiber reinforced polystyrene resin.

[0141] In some embodiments, the first fiber resin layer 131 comprises multiple layers of first fiber-reinforced prepreg; and / or, the second fiber resin layer 132 comprises multiple layers of second fiber-reinforced prepreg.

[0142] In some embodiments, the material of the cushioning layer includes at least one of balsa wood, honeycomb, rubber, foam material, and rigid polyurethane.

[0143] In some embodiments, the reinforcing layer is made of at least one of steel, titanium, ceramic, and high-strength plastic.

[0144] In some embodiments, the protective plate 13 may further include a reinforcing layer. Along the thickness direction X of the protective plate, the reinforcing layer may be located on the side of the first fiber resin layer 131 opposite to the second fiber resin layer 132, or between the first fiber resin layer 131 and the second fiber resin layer 132. The reinforcing layer may also be located on the side of the second fiber resin layer 132 opposite to the first fiber resin layer 131. The material of the reinforcing layer may be independently selected from glass fiber reinforced polyamide resin, glass fiber reinforced polypropylene resin, glass fiber reinforced polyethylene resin, glass fiber reinforced polycarbonate resin, or glass fiber reinforced polystyrene resin. The reinforcing layer may also be made of resin.

[0145] In some embodiments, the first fastener 14 may be a nut 141, a screw, a sleeve structure, etc.

[0146] In some embodiments, the first fastener 14 may be a thermoplastic self-tapping screw.

[0147] In some embodiments, the material of the first fastener 14 may include metal, plastic, or fiber-reinforced composite materials. Of course, the material of the first fastener 14 may also be a composite material, such as a metal matrix with a ceramic coating.

[0148] In some embodiments, a second fastener 16 is pre-installed inside the housing 11. The protective plate 13 is locked to the housing 11 by the cooperation of the first fastener 14 and the second fastener 16. Alternatively, a portion of the protective plate 13 can be clamped between the housing 11 and the first fastener 14.

[0149] In some embodiments, Figure 10 and Figure 11 The housing 11 has a threaded hole inside. The first fastener 14 includes a second screw 143, which is threadedly connected to the threaded hole. The support member 15 is disposed between the second screw 143 and the surface of the housing 11 facing the protective plate 13. In some other embodiments, the housing 11 includes a frame 113, and the threaded hole is disposed on the surface of the frame 113 facing the protective plate 13.

[0150] In some embodiments, the thickness direction X of the protective plate is parallel to the direction of gravity.

[0151] The material of the enclosure 11 may include, but is not limited to, metal. In embodiments where the material of the enclosure 11 includes metal, the material of the enclosure 11 may include, but is not limited to, aluminum alloy, steel, etc.

[0152] The material of the support member 15 may include, but is not limited to, metal. In embodiments where the material of the support member 15 includes metal, the material of the support member 15 may include, but is not limited to, aluminum alloy, steel, etc.

[0153] In some embodiments, along the thickness direction X of the protective plate, the support member 15 is disposed between the first fastener 14 and the housing 11.

[0154] Along the thickness direction X of the protective plate, a support member 15 is also provided between the housing 11 and the first fastener 14. In the same projection plane perpendicular to the thickness direction X of the protective plate, the orthographic projection of the support member 15 does not overlap with the orthographic projection of the protective plate 13 at least partially. This means that when the locking force of the first fastener 14 is transmitted to the protective plate 13, the support member 15 can limit the deformation of the fiber resin layer under compression. In other words, the presence of the support member 15 can limit the first fastener 14 from further over-compressing the fiber resin layer after it has secured the support member 15. In some embodiments, please refer to... Figures 18-20 The support member 15 includes a support portion 1501 and a protrusion 1502. In the same projection plane perpendicular to the thickness direction X of the protective plate, the orthographic projection of the support portion 1501 does not overlap with the orthographic projection of the protective plate 13. The protrusion 1502 protrudes from the surface of the support portion 1501 along a first direction, which intersects the thickness direction X of the protective plate. Optionally, the protrusion 1502 may be located at one end of the support portion 1501 near the housing 11 in the thickness direction X of the protective plate; alternatively, the protrusion 1502 may be located at one end of the support portion 1501 near the first fastener 14 in the thickness direction X of the protective plate; alternatively, a portion of the protrusion 1502 may also be located within the protective plate 13. It should be noted that in some embodiments, the protrusion 1502 can be understood as a burr on the support member 15; alternatively, the support portion 1501 and the protrusion 1502 are integrally formed.

[0155] In some embodiments, the support portion 1501 is annular, and the protrusion 1502 protrudes from the outer peripheral surface of the support portion 1501.

[0156] In some embodiments, along the thickness direction X of the protective plate, the surface of the first fastener 14 is provided with a groove, and at least a portion of the support member 15 is located within the groove. Optionally, please refer to... Figure 18 The nut 141 has a groove in the thickness direction X of the protective plate, and at least a portion of the support member 15 can be located in the groove.

[0157] In some embodiments, the support member 15 is connected to the first fastener 14 and the support member 15 is connected to the housing 11.

[0158] In some embodiments, the support member 15 is connected to the first fastener 14 and the support member 15 is connected to the second fastener 16.

[0159] In some embodiments, the protective plate 13 is provided with a through hole, and the orthographic projection of the support member 15 is located within the through hole in the same projection plane perpendicular to the thickness direction X of the protective plate. In other embodiments, the protective plate 13 includes a first portion and a second portion, and a connecting portion connecting the first portion and the second portion. The connecting portion, the first portion, and the second portion together define a channel through which a portion of the first fastener 14 passes and locks the protective plate 13 to the housing 11. In the same projection plane perpendicular to the thickness direction X of the protective plate, the orthographic projection of the support member 15 is located within the channel.

[0160] In the technical solution of this application embodiment, the support member 15 is disposed between the housing 11 and the first fastener 14 along the thickness direction X of the protective plate, and its orthographic projection in the same projection plane perpendicular to the thickness direction X of the protective plate does not overlap with the orthographic projection of the protective plate 13 at least partially. This arrangement can play a mechanical adjustment role without affecting the compactness of the overall structure of the electrical device. When the locking force of the first fastener 14 is transmitted to the protective plate 13, the support member 15 can limit the deformation of the fiber resin layer under compression, reduce the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer, and at the same time reduce the risk of loss of protective function of the protective plate 13 due to crushing of the fiber resin layer, thereby improving the reliability of the electrical device.

[0161] According to some embodiments of this application, please refer to Figures 3-6 In the same projection plane perpendicular to the thickness direction X of the protective plate, the orthographic projection of the support member 15 does not overlap with the orthographic projection of the protective plate 13.

[0162] In the above scheme, the support member 15 is disposed between the housing 11 and the first fastener 14 along the thickness direction X of the protective plate, and its orthographic projection is in the same projection plane perpendicular to the thickness direction X of the protective plate and does not overlap with the orthographic projection of the protective plate 13. This arrangement can play a mechanical adjustment role without affecting the compactness of the overall structure of the electrical device. When the locking force of the first fastener 14 is transmitted to the protective plate 13, the support member 15 can limit the deformation of the fiber resin layer under compression, reduce the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer, and at the same time reduce the risk of loss of protective function of the protective plate 13 due to crushing of the fiber resin layer, thereby improving the reliability of the electrical device.

[0163] According to some embodiments of this application, please refer to Figures 3-8The battery device 100 also includes a second fastener 16, which is fixed to the housing 11 and is threadedly connected to the first fastener 14.

[0164] In some embodiments, the second fastener 16 may be a nut 141, a screw, a sleeve structure, etc.

[0165] In some embodiments, the material of the second fastener 16 may include metal, plastic, or fiber-reinforced composite materials. Of course, the material of the second fastener 16 may also be a composite material, such as a metal matrix with a ceramic coating.

[0166] The second fastener 16 can be fixed to the housing 11 by welding, threaded connection, snap-fit, or other methods.

[0167] In the above solution, the protective plate 13 is secured to the housing 11 by the second fastener 16, which is threadedly connected to the first fastener 14. This approach reduces the risk of excessive deformation of the housing 11 due to localized stress concentration. Furthermore, it eliminates the need for high-precision thread machining within the housing 11 during manufacturing, improving the processing efficiency of the electrical equipment. It also reduces the risk of the entire housing 11 being scrapped due to thread failure, thus lowering maintenance costs. In addition, the two fasteners work synergistically to reduce the preload required for securing the protective plate 13, further reducing the risk of matrix cracking or fiber breakage due to excessive compression of the fiber resin layer, and further reducing the risk of loss of protective function due to fiber resin layer crushing.

[0168] According to some embodiments of this application, please refer to Figures 3-8 Along the thickness direction X of the protective plate, the support member 15 is disposed between the first fastener 14 and the second fastener 16.

[0169] Along the thickness direction X of the protective plate, the support member 15 is disposed between the first fastener 14 and the second fastener 16, which can be understood as the support member 15 abutting against both the first fastener 14 and the second fastener 16. Alternatively, it can be understood that the support member 15 is spaced apart from the first fastener 14 and / or the second fastener 16 along the thickness direction X of the protective plate and is located between the first fastener 14 and the second fastener 16. For example, a buffer structure can be added between the first fastener 14 and the support member 15.

[0170] In the above scheme, since the locking force between the first fastener 14 and the second fastener 16 is relatively large, the support member 15 is set between the first fastener 14 and the second fastener 16. This can limit the deformation of the fiber resin layer under compression in the area with large locking force, and further reduce the risk of damage to the fiber resin layer.

[0171] According to some embodiments of this application, please refer to Figures 3-8 and Figure 17 The housing 11 includes a frame 113 and a beam 114, with the beam 114 disposed within and connected to the frame 113. A first fastener 14 includes a nut 141, and a second fastener 16 includes a first sleeve 161. At least a portion of the first sleeve 161 is disposed within the beam 114, and the nut 141 is fitted onto the outer periphery of the first sleeve 161 and threadedly connected to it. A support member 15 includes a first support member 151, which is disposed between the nut 141 and the first sleeve 161.

[0172] In some embodiments, the frame 113 includes a plurality of side beams, which are connected at their ends and surround the protective plate 13. The beam body 114 can be a side beam.

[0173] In some embodiments, at least one partition beam is provided within the frame 113, dividing the internal space of the housing 11 into a first compartment and a second compartment. The first compartment and the second compartment can be used to accommodate at least one battery cell assembly from a plurality of battery cell assemblies, and can also be used to accommodate an electronic control module, etc. The beam 114 can be a partition beam.

[0174] In some embodiments, the inner side of the nut 141 is provided with an internal thread, and the outer peripheral side of the first sleeve 161 is provided with an external thread, and the internal thread and external thread are connected by a threaded connection.

[0175] In some embodiments, the first support 151 is integrally formed with the nut 141 or the first sleeve 161.

[0176] In some embodiments, the first support member 151, the nut 141, and the first sleeve 161 are all separately machined and then assembled.

[0177] In the above solution, by fitting the nut 141 onto the outer periphery of the first sleeve 161 and engaging it with the sleeve to lock the protective plate 13, the internal space of the sleeve can be fully utilized to carry out subsequent assembly steps such as mounting the housing 11, thus expanding the functions of the first fastener 14 and the second fastener 16. This reduces the number of sealing operations during the assembly process, lowering the risk of sealing failure in the housing 11.

[0178] According to some embodiments of this application, please refer to Figures 3-8 Along the thickness direction X of the protective plate, the protective plate 13 has a first surface 134 and a second surface 135 that are disposed opposite to each other. The protective plate 13 has a first through hole 136 that penetrates the first surface 134 and the second surface 135. The first support member 151 is disposed in the first through hole 136.

[0179] The axial direction of the first through hole 136 can intersect with the thickness direction X of the protective plate.

[0180] The first through hole 136 may include multiple segments, and the diameters of the multiple segments of the first through hole 136 may be different.

[0181] In some embodiments, along the thickness direction X of the protective plate, the first support member 151 may not extend beyond the first surface 134 and the second surface 135.

[0182] In the above scheme, the first support member 151 can utilize the space inside the first through hole 136, making the electrical device more compact and enabling the battery device 100 to have a higher energy density. In addition, the first through hole 136 can simultaneously serve as the assembly reference for the first fastener 14, the second fastener 16, and the support member 15, which helps to improve assembly efficiency.

[0183] According to some embodiments of this application, please refer to Figures 3-8 The protective plate 13 includes a first fiber resin layer 131, a reinforcing layer, and a second fiber resin layer 132, which are stacked sequentially along its thickness direction, as well as a first edge sealing portion 1311. Along the thickness direction X of the protective plate, the surface of the first fiber resin layer 131 facing away from the reinforcing layer is a first surface 134, and the surface of the second fiber resin layer 132 facing away from the reinforcing layer is a second surface 135. The reinforcing layer has a second through hole, which surrounds the first through hole 136. The first edge sealing portion 1311 is annular, and the outer peripheral surface of the first edge sealing portion 1311 is connected to the inner peripheral surface of the second through hole and to the first fiber resin layer 131 and the second fiber resin layer 132. A first support member passes through the first edge sealing portion 1311.

[0184] In some embodiments, the first through hole 136 includes a first hole segment, a second hole segment, and a third hole segment connected in sequence. The first hole segment is located in the first fiber resin layer 131, the second hole segment is formed by an annular first sealing portion 1311, and the third hole segment is located in the second fiber resin layer 132.

[0185] In the above solution, the first edge sealing portion 1311 can reduce the risk of the exposed reinforcement layer being corroded or damaged. Since the first support member passes through the first edge sealing portion 1311, when the locking force of the first fastener is transmitted to the protective plate, the first support member can limit the deformation of the first edge sealing portion 1311 under compression, reduce the risk of the first edge sealing portion 1311 being crushed and losing its protective function, and thus improve the reliability of the electrical device.

[0186] According to some embodiments of this application, the material of the first sealing portion 1311 includes resin or fiber resin.

[0187] According to some embodiments of this application, please refer to Figures 3-8 The first support member 151 and the nut 141 are integrally formed.

[0188] In some embodiments, please refer to Figure 8The nut 141 includes a top surface, a bottom surface, and an outer peripheral surface connecting the top and bottom surfaces. The first support member 151 is a boss protruding from the top surface of the nut 141. In some other embodiments, the boss can be an annular boss. Of course, the boss can include multiple segments of bosses, which are spaced apart circumferentially along the nut 141.

[0189] The first support member 151 and the nut 141 can be integrally formed by machining, casting, 3D printing, or other methods.

[0190] In some embodiments, the first support member 151 is annular, the inner diameter of the first support member 151 is equal to the inner diameter of the nut 141, and the thread of the nut 141 extends to the inner circumferential surface of the first support member 151.

[0191] In some embodiments, the first support member 151 protrudes radially toward the inner circumferential surface of the nut 141 towards the cylinder 1612, and the cylinder 1612 is provided with a relief portion to avoid the first support member 151.

[0192] In the above solution, the integrally molded first support 151 and nut 141 can simplify the assembly process and improve assembly efficiency. It can also reduce the risk of excessive displacement of the first support 151 during assembly, which could damage the fiber resin layer.

[0193] According to some embodiments of this application, please refer to Figures 3-8 The first support member 151 is annular, and the inner diameter of the first support member 151 is larger than the inner diameter of the nut 141.

[0194] Please refer to Figure 6 Since the inner diameter of the first support member 151 is larger than the inner diameter of the nut 141, there is a gap between the first support member 151 and the cylinder 1612.

[0195] In the above solution, since the inner diameter of the first support member 151 is larger than the inner diameter of the nut 141, the shape consistency of the thread termination end can be improved, and the machining accuracy of the thread can be increased. This reduces the risk of assembly gaps caused by low thread machining accuracy.

[0196] According to some embodiments of this application, please refer to Figures 3-8 The first sleeve 161 includes a cylinder 1612 and a flange 1613. The flange 1613 protrudes from the outer circumferential surface of the cylinder 1612. Along the thickness direction X of the protective plate, a part of the protective plate 13 and the first support member 151 are located between the flange 1613 and the nut 141.

[0197] In the above scheme, during the locking process of the protective plate 13, the locking force between the flange 1613 and the nut 141 is relatively large. The flange 1613 and the nut 141 compress the protective plate 13, which poses a high risk of damage to the fiber resin layer. By placing the first support 151 between the flange 1613 and the nut 141, the deformation of the fiber resin layer under compression can be limited in the area with a large locking force, thereby further reducing the risk of damage to the fiber resin layer.

[0198] According to some embodiments of this application, please refer to Figures 3-8 The battery device 100 also includes a first seal 17, which is annular and disposed between the flange portion 1613 and the protective plate 13.

[0199] The material of the first seal 17 may include, but is not limited to, foamed silicone seals.

[0200] In some embodiments, the compression ratio of the first seal 17 is any value between 30% and 70%. A first seal 17 with a compression ratio in this range can achieve both good sealing performance and material durability.

[0201] In the above scheme, the first sealing element 17 can improve the sealing performance between the flange 1613 and the protective plate 13.

[0202] According to some embodiments of this application, please refer to Figures 3-8 The flange portion 1613 has a first end face 1613a facing the protective plate 13, the first end face 1613a is provided with a first groove 1613b, and the first sealing member 17 is disposed in the first groove 1613b.

[0203] In some embodiments, the first groove 1613b is spaced apart from the outer peripheral surface of the flange portion 1613.

[0204] In the above scheme, the first groove 1613b can limit the deformation of the first seal 17, which is beneficial to ensure that the first seal 17 has sufficient compression after assembly, so as to achieve a high sealing performance between the flange 1613 and the protective plate 13.

[0205] According to some embodiments of this application, please refer to Figures 3-8 The first groove 1613b extends to the outer peripheral surface of the flange portion 1613.

[0206] The first groove 1613b can be machined by milling or other methods and extended to the outer circumferential surface of the flange portion 1613.

[0207] The first groove 1613b extends to the outer peripheral surface of the flange portion 1613, meaning that the first groove 1613b can make full use of the inherent space of the flange portion 1613 to accommodate the first seal 17 with a larger sealing width.

[0208] In the above solution, since the first groove 1613b extends to the outer peripheral surface of the flange portion 1613, the first groove 1613b can have a larger accommodating space to accommodate the first seal 17, which is beneficial for arranging a wider first seal 17, thereby further improving the sealing performance between the flange portion 1613 and the protective plate 13. When the first seal 17 is located between the fiber resin layer and the flange portion 1613, the wider sealing width of the first seal 17 can significantly reduce the risk of seal failure caused by the high surface roughness of the fiber resin layer.

[0209] According to some embodiments of this application, please refer to Figures 3-8 The depth of the first groove 1613b is H, which satisfies: 1mm≤H≤3mm.

[0210] The depth of the first groove 1613b can be any value between 1 mm and 3 mm, for example, any one of the following values ​​or a range between any two: 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm.

[0211] In the above scheme, when H≥1mm, the first groove 1613b has a large depth, which can reduce the risk of the first seal 17 being damaged due to excessive compression; when H≤3mm, the depth of the first groove 1613b is small, which can reduce the risk of the first seal 17 failing to form sufficient compression deformation, resulting in seal failure; therefore, when 1mm≤H≤3mm, while reducing the risk of the first seal 17 being damaged due to excessive compression, it can also reduce the risk of the first seal 17 failing to form sufficient compression deformation, resulting in seal failure.

[0212] According to some embodiments of this application, please refer to Figures 3-8 The outer diameter of the first seal 17 is D1, and the inner diameter of the first seal 17 is D2, satisfying the following:

[0213]

[0214] Half of the difference between the outer diameter and the inner diameter of the first sealing element 17 can be any value between 5 mm and 12 mm, for example, any one of the following values ​​or a range between any two: 5 mm, 5.2 mm, 5.4 mm, 5.6 mm, 5.8 mm, 6 mm, 6.2 mm, 6.4 mm, 6.6 mm, 6.8 mm, 7 mm, 7.2 mm, 7.4 mm, 7.6 mm, 7.8 mm, 8 mm, 8.2 mm, 8.4 mm, 8.6 mm, 8.8 mm, 9 mm, 9.2 mm, 9.4 mm, 9.6 mm, 9.8 mm, 10 mm, 10.2 mm, 10.4 mm, 10.6 mm, 10.8 mm, 11 mm, 11.2 mm, 11.4 mm, 11.6 mm, 11.8 mm, 12 mm.

[0215] In the above scheme, when When this is done, the first sealing element 17 can have a higher sealing width, improving the sealing performance between the flange 1613 and the protective plate 13; when When this is done, the friction area of ​​the first seal 17 can be reduced, thus reducing the risk of fatigue failure of the first seal 17; therefore, when 5mm At the same time, while improving the sealing performance between the flange 1613 and the protective plate 13, the friction area of ​​the first seal 17 can also be reduced, thereby reducing the risk of fatigue failure of the first seal 17.

[0216] According to some embodiments of this application, please refer to Figures 3-8 The first seal 17 has a third surface 171 that contacts the flange portion 1613 and a fourth surface 172 that contacts the protective plate 13. When the first seal 17 is in its natural state, both the third surface 171 and the fourth surface 172 are planar.

[0217] The surface of the fiber resin layer is usually relatively rough. The third surface 171 and the fourth surface 172 are both flat, which means that the force required for the first seal 17 to have a high degree of fit is small. In other words, a small force can be used to seal the gap between the flange 1613 and the protective plate 13 through the first seal 17, and to achieve a high degree of sealing between the flange 1613 and the protective plate 13.

[0218] In the above solution, since the third surface 171 and the fourth surface 172 are both planar when the first seal 17 is in its natural state, the pressure required for the sealing surface of the first seal 17 to have sufficient fit can be reduced, thereby reducing the risk of the fiber resin layer being over-compressed and damaged when excessive force is transmitted to the protective plate 13.

[0219] According to some embodiments of this application, the compression ratio of the first seal 17 is Yb, which satisfies: 30% ≤ Yb ≤ 70%.

[0220] The compression ratio of the first seal 17 can be any value between 30% and 70%, for example, any one of 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, etc., or a range between any two.

[0221] In the above scheme, when Yb≥30%, the fit of the first seal 17 is high, and the sealing performance between the flange 1613 and the protective plate 13 is good; when Yb≤70%, the risk of the first seal 17 being crushed can be reduced; therefore, when 30%≤Yb≤70%, while ensuring good sealing between the flange 1613 and the protective plate 13, the risk of the first seal 17 being crushed can also be reduced.

[0222] According to some embodiments of this application, please refer to Figures 3-8 The housing 11 also includes a thermal management component 18, which supports the battery cell 12. Along the thickness direction X of the protective plate, the protective plate 13 is located on the side of the thermal management component 18 opposite to the battery cell 12. A flange 1613 is located between the protective plate 13 and the thermal management component 18. The battery assembly 100 also includes a second seal 19, which is annular and disposed between the flange 1613 and the thermal management component 18. The inner diameter of the first seal 17 is larger than the outer diameter of the second seal 19.

[0223] Please refer to Figure 9 In some embodiments, the thermal management component 18 may include a first plate 181 and a second plate 182 stacked together. The surface of the second plate 182 facing the first plate 181 is provided with a recess, which contains a heat exchange medium used to regulate the temperature of the battery cell 12.

[0224] In some embodiments, the second seal 19 includes a body portion that is annular and has at least one sealing lip provided on at least one side surface along the axial direction of the body portion.

[0225] The material of the second seal 19 includes, but is not limited to, rubber, silicone, etc.

[0226] In some embodiments, please refer to Figure 6 In the same projection plane perpendicular to the thickness direction X of the protective plate, the orthographic projection of the first seal 17 surrounds the orthographic projection of the second seal 19, and the orthographic projections of the first seal 17 and the second seal 19 are spaced apart.

[0227] In the above scheme, the second seal 19 improves the sealing performance between the flange 1613 and the thermal management component 18. Since the inner diameter of the first seal 17 is larger than the outer diameter of the second seal 19, and the first seal 17 is further away from the first fastener 14, the sealing width of the first seal 17 can be set larger, which is beneficial for further improving the sealing performance between the flange 1613 and the protective plate 13. Especially under the premise that the orthographic projection of the first seal 17 and the second seal 19 along the thickness direction X of the protective plate do not overlap, this arrangement allows the sealing width of the first seal 17 to be set as large as possible.

[0228] According to some embodiments of this application, please refer to Figures 3-8 Along the thickness direction X of the protective plate, neither the nut 141 nor the first sleeve 161 extends beyond the surface of the protective plate 13 away from the battery cell 12.

[0229] Along the thickness direction X of the protective plate, neither the nut 141 nor the first sleeve 161 extends beyond the surface of the protective plate 13 away from the battery cell 12. This means that foreign objects outside the battery device 100, such as stones, are unlikely to directly impact the nut 141 and the first sleeve 161, thereby preventing structural deformation or thread damage to the nut 141 or the first sleeve 161.

[0230] In the above scheme, since the nut 141 and the first sleeve 161 do not extend beyond the surface of the protective plate 13 away from the battery cell 12 along the thickness direction X of the protective plate, the risk of the nut 141 and the first sleeve 161 failing to lock due to external force is low.

[0231] According to some embodiments of this application, please refer to Figures 12-16 The housing 11 includes a frame 113; the protective plate 13 includes a body 137 and a flange 138, the flange 138 surrounds the body 137; the first fastener 14 includes a first screw 142, the first screw 142 connects the flange 138 to the frame 113; the support member 15 includes a second support member 152, the second support member 152 is disposed between the flange 138 and the frame 113.

[0232] In some embodiments, the first fastener 14 includes a first screw 142, the second fastener 16 includes a threaded sleeve 162, the threaded sleeve 162 is threadedly connected to the first screw 142, and at least a portion of the threaded sleeve 162 is disposed within the frame 113; the support member 15 includes a second support member 152, the second support member 152 is disposed between the first screw 142 and the threaded sleeve 162.

[0233] The threaded sleeve 162 can be installed inside the frame 113 by welding, threaded connection or snap-fit.

[0234] In some embodiments, the second support 152 is integrally formed with one of the screw or the threaded sleeve 162.

[0235] In the above scheme, when the locking force of the first screw 142 is transmitted to the protective plate 13, the second support member 152 can limit the deformation of the fiber resin layer under compression, reduce the risk of matrix cracking or fiber breakage caused by excessive compression of the fiber resin layer, and at the same time reduce the risk of loss of protective function of the protective plate due to crushing of the fiber resin layer, thereby improving the reliability of the battery device 100.

[0236] According to some embodiments of this application, please refer to Figures 12-16 The first screw 142 includes a nut 1421 and a screw rod 1422. The second support member 152 is sleeved on the outer periphery of the screw rod 1422. Along the thickness direction X of the protective plate, the second support member 152 is located between the nut 1421 and the frame 113.

[0237] In some embodiments, along the thickness direction X of the protective plate, the second support member 152 is located between the nut 1421 and the frame 113. This can be understood as the second support member 152 being located between the surface of the nut 1421 facing the frame 113 and the surface of the frame 113 facing the nut 1421 along the thickness direction X of the protective plate.

[0238] In some embodiments, the second support member 152 may be in the shape of an O-ring.

[0239] In the above scheme, during the locking process of the protective plate 13, the locking force between the nut 1421 and the frame 113 is relatively large. The nut 1421 and the frame 113 compress the protective plate 13, which poses a high risk of damage to the fiber resin layer. By placing the first support 151 between the nut 1421 and the frame 113, the deformation of the fiber resin layer can be limited in the area with a large locking force, thereby further reducing the risk of damage to the fiber resin layer.

[0240] According to some embodiments of this application, please refer to Figures 12-16 Along the thickness direction X of the protective plate, the protective plate 13 has a first surface 134 and a second surface 135 that are disposed opposite to each other. The protective plate 13 has a third through hole 139 that penetrates the first surface 134 and the second surface 135. The second support member 152 is disposed in the third through hole 139.

[0241] The axial direction of the third through hole 139 can intersect with the thickness direction X of the protective plate.

[0242] The third through hole 139 may include multiple segments, and the diameters of the multiple segments of the first through hole 136 may be different.

[0243] In the above scheme, the second support member 152 can utilize the space inside the third through hole 139, making the electrical device more compact and facilitating a higher energy density in the battery device 100. Furthermore, the third through hole 139 can simultaneously serve as an assembly reference for the first fastener 14, the second fastener 16, and the second support member 152, improving the assembly efficiency of the battery device 100. For some embodiments of this application, please refer to... Figures 12-16 The second support member 152 is an open ring.

[0244] The fact that the second support member 152 is an open ring means that the second support member 152 can expand or contract to a certain extent.

[0245] In the above scheme, since the second support member 152 is an open ring with a flexible structure, the open ring can expand or contract during the tightening process of the first screw 142, dispersing a certain amount of the locking force, thereby further reducing the risk of damage to the fiber resin layer.

[0246] According to some embodiments of this application, please refer to Figures 12-16 In the thickness direction X of the protective plate, the thickness of the opening ring is greater than the thickness of the protective plate 13.

[0247] In the above scheme, since the thickness of the open ring is greater than the thickness of the protective plate 13, the risk of damage to the fiber resin layer can be further reduced.

[0248] According to some embodiments of this application, please refer to Figures 12-16 The battery device 100 also includes a third seal 21, which is disposed between the flange edge 138 and the housing 11.

[0249] The material of the third seal 21 includes, but is not limited to, rubber, silicone, etc.

[0250] In some embodiments, the third seal 21 may be a frame structure.

[0251] In some embodiments, the housing 11 includes a frame 113, and a third seal 21 is disposed between the frame 113 and the protective plate 13.

[0252] In some embodiments, along the thickness direction X of the protective plate, the body 137 protrudes toward the side away from the battery cell 12, and a recess is formed on the side of the body 137 facing the battery cell 12 and a recess is formed on the side of the body 137 away from the battery cell 12.

[0253] In the above scheme, the installation of the third sealing element 21 can improve the sealing performance between the flange edge 138 and the housing 11.

[0254] According to some embodiments of this application, please refer to Figures 12-16Multiple third through holes 139 are provided, and the multiple third through holes 139 are arranged at intervals along the circumference of the flange edge 138. The distance between two adjacent third through holes 139 is L1, which satisfies: 70mm≤L1≤90mm.

[0255] The distance between two adjacent third through holes 139 can be any value between 70mm and 90mm, such as any one of 70mm, 72mm, 74mm, 76mm, 78mm, 80mm, 82mm, 84mm, 86mm, 88mm, 90mm, or any range between two of them.

[0256] In the above scheme, when L1≥70mm, the distance between two adjacent third through holes 139 is larger, which can reduce the risk of the third seal 21 being crushed due to excessive compressive stress; when L1≤90mm, the distance between two adjacent third through holes 139 is smaller, which can reduce the risk of the third seal 21 lifting and causing seal failure; therefore, when 70mm≤L1≤90mm, while reducing the risk of the third seal 21 being crushed due to excessive compressive stress, it can also reduce the risk of the third seal 21 lifting and causing seal failure.

[0257] According to some embodiments of this application, please refer to Figures 12-16 The flange edge 138 includes adjacent first sub-flange edges 1381 and second sub-flange edges 1382. The first sub-flange edge 1381 has a first outer edge 1381a, and the second sub-flange edge 1382 has a second outer edge 1382a. Multiple third through holes 139 are provided, including multiple first sub-through holes 1391 provided on the first sub-flange edge 1381 and multiple second sub-through holes 1392 provided on the second sub-flange edge 1382. The distance between the first sub-through hole 1391 closest to the second outer edge 1382a and the second outer edge 1382a is L2, satisfying: 20mm≤L2≤35mm. The distance between the second sub-through hole 1392 closest to the first outer edge 1381a and the first outer edge 1381a is L3, satisfying: 20mm≤L3≤35mm.

[0258] The distance between the first sub-through hole 1391 that is closest to the second outer edge 1382a and the second outer edge 1382a can be any value between 20mm and 35mm, for example, any point value or a range between any two of 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm.

[0259] The distance between the second sub-through hole 1392 closest to the first outer edge 1381a and the first outer edge 1381a can be any value between 20mm and 35mm, for example, any point value or a range between any two of 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm.

[0260] In the above scheme, when L2≥20mm, the distance between the one closest to the second outer edge 1382a among the multiple first sub-through holes 1391 and the second outer edge 1382a is relatively large. This allows for the placement of a third sealing element 21 with a larger area between the one closest to the second outer edge 1382a among the multiple first sub-through holes 1391 and the second outer edge 1382a, reducing the risk of the third sealing element 21 being crushed after locking due to its small area. When L2≤35mm, the distance between the one closest to the second outer edge 1382a among the multiple first sub-through holes 1391 and the second outer edge 1382a is relatively large. The smaller distance between the third seal 21 and the second outer edge 1382a reduces the risk of the third seal 21, which is the closest to the second outer edge 1382a among the multiple first sub-through holes 1391, lifting up. Therefore, when 20mm≤L2≤35mm, the risk of the third seal 21 being crushed after locking due to its small area is reduced, and the risk of the third seal 21, which is the closest to the second outer edge 1382a among the multiple first sub-through holes 1391, lifting up is also reduced.

[0261] When L3 ≥ 20mm, the distance between the second sub-through hole 1392 closest to the first outer edge 1381a and the first outer edge 1381a is relatively large. This allows for a larger area of ​​the third seal 21 to be arranged between the second sub-through hole 1392 closest to the first outer edge 1381a and the first outer edge 1381a, reducing the risk of the third seal 21 being crushed after locking due to its small area. When L2 ≤ 35mm, the distance between the second sub-through hole 1392 closest to the first outer edge 1381a and the first outer edge 1381a is relatively large. The smaller distance between the outer edges 1381a reduces the risk of the third seal 21, which is the closest to the first outer edge 1381a among the multiple second sub-through holes 1392, lifting up. Therefore, when 20mm≤L2≤35mm, the risk of the third seal 21 being crushed after locking due to its small area is reduced, and the risk of the third seal 21, which is the closest to the first outer edge 1381a among the multiple second sub-through holes 1392, lifting up is also reduced.

[0262] According to some embodiments of this application, please refer to Figures 12-16 The third seal 21 is annular and has a third through hole through which the first screw 142 passes. The minimum distance between the third through hole and the inner circumferential surface of the third seal 21 is W, which satisfies: 7mm≤W≤10mm.

[0263] The minimum distance between the third through hole and the inner circumferential surface of the third seal 21 can be any value between 7 mm and 10 mm, for example, any one of the following values ​​or a range between any two: 7 mm, 7.2 mm, 7.4 mm, 7.6 mm, 7.8 mm, 8 mm, 8.2 mm, 8.4 mm, 8.6 mm, 8.8 mm, 9 mm, 9.2 mm, 9.4 mm, 9.6 mm, 9.8 mm, 10 mm.

[0264] In the above scheme, when W≥7mm, the third sealing element 21 has a larger sealing width, which can reduce the risk of sealing failure; when W≤10mm, the third sealing element 21 occupies less space, which is beneficial to enable the battery device 100 to have a higher energy density; therefore, when 7mm≤W≤10mm, the battery device 100 can achieve both high sealing and high energy density.

[0265] According to some embodiments of this application, please refer to Figures 12-16 The first fastener 14 includes a first screw 142, and the battery device 100 also includes a second fastener 16, which includes a threaded sleeve 162 that is threadedly connected to the first screw 142. At least a portion of the threaded sleeve 162 is disposed within the frame 113. The support member 15 includes a second support member 152 that is disposed between the first screw 142 and the threaded sleeve 162.

[0266] In the above solution, by using the threaded sleeve 162, which is at least partially located in the frame 113, to cooperate with the first screw 142 to lock the protective plate 13, the locking force can be transmitted to the frame 113 more evenly through the threaded sleeve 162, reducing the risk of locking failure caused by stress concentration.

[0267] According to some embodiments of this application, please refer to Figures 12-16 The protective plate 13 includes a first fiber resin layer 131, a reinforcing layer and a second fiber resin layer 132 stacked sequentially along its thickness direction, and a second edge sealing portion 1312; the reinforcing layer has a fifth surface and a sixth surface opposite to each other along its thickness direction and an outer peripheral surface connecting the fifth surface and the sixth surface, the second edge sealing portion 1312 covers the outer peripheral surface of the reinforcing layer and connects the first fiber resin layer 131 and the second fiber resin layer 132, and the second support member 152 passes through the second edge sealing portion 1312.

[0268] In some embodiments, the third through hole 139 includes a fourth hole segment, a fifth hole segment, and a sixth hole segment, wherein the fourth hole segment is located in the first fiber resin layer 131, the fifth hole segment is located in the second sealing portion 1312, and the sixth hole segment is located in the second fiber resin layer.

[0269] In the above solution, the second edge sealing portion 1312 can reduce the risk of the exposed reinforcement layer being corroded or damaged. Since the second support member 152 passes through the second edge sealing portion 1312, when the locking force of the first fastener 14 is transmitted to the protective plate 13, the second support member 152 can limit the deformation of the second edge sealing portion 1312 under compression, reduce the risk of the second edge sealing portion 1312 being crushed and losing its protective function, and thus improve the reliability of the battery device 100.

[0270] According to some embodiments of this application, the material of the second sealing portion 1312 includes resin or fiber resin.

[0271] According to some embodiments of this application, the material of the reinforcing layer includes at least one of steel, titanium, ceramic, and high-strength plastic.

[0272] According to some embodiments of this application, please refer to Figures 4-17 The housing 11 includes a frame 113 and a beam 114, the beam 114 being disposed within and connected to the frame 113. The protective plate 13 includes a body 137 and a flange 138, the flange 138 surrounding the body 137. The first fastener 14 includes a nut 141 and a first screw 142. The battery device 100 also includes a second fastener 16, the second fastener 16 including a first sleeve 161 and a threaded sleeve 162. At least a portion of the first sleeve 161 is disposed within... Inside the beam 114, a nut 141 is fitted onto the outer periphery of the first sleeve 161 and threadedly connected to the first sleeve 161; at least a portion of a threaded sleeve 162 is disposed inside the frame 113, and the threaded sleeve 162 is threadedly connected to the first screw 142; the support member 15 includes a first support member 151 and a second support member 152, the first support member 151 is disposed between the nut 141 and the first sleeve 161, and the second support member 152 is disposed between the flange edge 138 and the frame 113.

[0273] In the above scheme, when the locking force of the nut 141 is transmitted to the protective plate 13, and when the locking force of the first screw 142 is transmitted to the protective plate 13, the first support member 151 and the second support member 152 can limit the deformation of the fiber resin layer under compression, reduce the risk of matrix cracking or fiber breakage caused by excessive compression of the fiber resin layer, and at the same time reduce the risk of loss of protective function of the protective plate 13 due to crushing of the fiber resin layer, thereby improving the reliability of the battery device 100.

[0274] According to some embodiments of this application, please refer to Figure 1This application provides an electrical device that includes the battery device 100 in one or more of the above embodiments, the battery device 100 being used to provide electrical energy.

[0275] In the above solutions, since the battery device 100 in one or more of the above embodiments has high reliability, the power-consuming device including the battery device 100 in one or more of the above embodiments also has high reliability.

[0276] According to some embodiments of this application, please refer to Figures 3-17 This application provides a battery device 100, which includes a housing 11, a battery cell 12, a protective plate 13, a first fastener 14, a second fastener 16, a first seal 17, a second seal 19, and a third seal 21.

[0277] The housing 11 includes a frame 113, a thermal management component 18, and a cover. Along the thickness direction X of the protective plate, the housing 11 has two opposing openings. The cover closes one opening, and the thermal management component 18 closes the other opening. The frame 113 surrounds the protective plate 13. The protective plate 13 is located at the bottom of the housing 11 along the direction of gravity, and the battery cell 12 is disposed inside the housing 11. The thermal management component 18 supports the battery cell 12. Both sides of the protective plate 13 along its thickness direction are composed of fiber resin layers. A first fastener 14 is used to lock the protective plate 13 to the housing 11, and a portion of the protective plate 13 is clamped between the housing 11 and the first fastener 14 along the thickness direction X of the protective plate.

[0278] Along the thickness direction X of the protective plate, the support member 15 is disposed between the first fastener 14 and the second fastener 16.

[0279] Please refer to Figures 3-8 as well as Figure 17The housing 11 also includes a frame 113 and a beam 114. The beam 114 is disposed within and connected to the frame 113. The beam 114 can be referred to as the central mounting beam of the battery device 100. The first fastener 14 includes a nut 141, and the second fastener 16 includes a first sleeve 161. At least a portion of the first sleeve 161 is disposed within the beam 114. The nut 141 is fitted onto the outer periphery of the first sleeve 161 and threadedly connected to the first sleeve 161. The support member 15 includes a first support member 151, which is disposed between the nut 141 and the first sleeve 161. Along the thickness direction X of the protective plate, the protective plate 13 has a first surface 134 and a second surface 135 disposed opposite to each other. The protective plate 13 has a first through hole 136 that penetrates the first surface 134 and the second surface 135. The first support member 151 is disposed within the first through hole 136. The first support member 151 is integrally formed with the nut 141. The first support member 151 is annular, and its inner diameter is larger than that of the nut 141. The first sleeve 161 includes a cylindrical body 1612 and a flange portion 1613. The flange portion 1613 protrudes from the outer peripheral surface of the cylindrical body 1612. Along the thickness direction X of the protective plate, a portion of the protective plate 13 and the first support member 151 are located between the flange portion 1613 and the nut 141. The first sealing member 17 is annular and is disposed between the flange portion 1613 and the protective plate 13. The flange portion 1613 has a first end face 1613a facing the protective plate 13. The first end face 1613a has a first groove 1613b, and the first sealing member 17 is disposed within the first groove 1613b. The first groove 1613b extends to the outer peripheral surface of the flange portion 1613. The first seal 17 has a third surface 171 that contacts the flange 1613 and a fourth surface 172 that contacts the protective plate 13. When the first seal 17 is in its natural state, both the third surface 171 and the fourth surface 172 are planar. The thermal management component 18 supports the battery cell 12. Along the thickness direction X of the protective plate, the protective plate 13 is located on the side of the thermal management component 18 opposite to the battery cell 12, and the flange 1613 is located between the protective plate 13 and the thermal management component 18. The second seal 19 is annular and is disposed between the flange 1613 and the thermal management component 18. The inner diameter of the first seal 17 is larger than the outer diameter of the second seal 19. Along the thickness direction X of the protective plate, neither the nut 141 nor the first sleeve 161 extends beyond the surface of the protective plate 13 opposite to the battery cell 12.

[0280] Please refer to Figure 5The battery device 100 also includes a second sleeve 20, which is threadedly connected to the first sleeve 161. The second sleeve 20 is fitted onto the outer periphery of the first sleeve 161, and is located at the end of the first sleeve 161 away from the nut 141. One end of the second sleeve 20 extends out of the cover. The axial channels of the first sleeve 161, the second sleeve 20, and the nut 141 are interconnected, and a mounting component for attaching to an electrical device can pass through the battery device 100 via the aforementioned interconnected axial channels.

[0281] The housing 11 includes a frame 113; a first fastener 14 includes a first screw 142, and a second fastener 16 includes a threaded sleeve 162, which is threadedly connected to the first screw 142, with at least a portion of the threaded sleeve 162 disposed within the frame 113; a support member 15 includes a second support member 152, which is disposed between the first screw 142 and the threaded sleeve 162. The first screw 142 includes a nut 1421 and a screw 1422, and the second support member 152 is fitted onto the outer periphery of the screw 1422. Along the thickness direction X of the protective plate, the second support member 152 is located between the nut 1421 and the frame 113. The second support member 152 is an open ring. The protective plate 13 includes a body 137 and a flange 138, which surrounds the body 137, and the first screw 142 connects the flange 138 to the frame 113; a third sealing member 21 is disposed between the flange 138 and the housing 11. Along the thickness direction X of the protective plate, the protective plate 13 has a first surface 134 and a second surface 135 disposed opposite to each other, and the protective plate 13 has a third through hole 139 that penetrates the first surface 134 and the second surface 135. The second support member 152 is disposed in the third through hole 139.

[0282] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; The battery cell is disposed inside the housing; A protective plate is disposed at the bottom of the battery cell, and at least one side of the protective plate along its thickness direction is a fiber resin layer; A first fastener is used to lock the protective plate to the housing, and a portion of the protective plate is clamped between the housing and the first fastener along the thickness direction of the protective plate. Along the thickness direction of the protective plate, a support member is also provided between the box body and the first fastener. In the same projection plane perpendicular to the thickness direction of the protective plate, the orthographic projection of the support member and the orthographic projection of the protective plate do not overlap at least partially.

2. The battery device according to claim 1, characterized in that, In the same projection plane perpendicular to the thickness direction of the protective plate, the orthographic projection of the support member does not overlap with the orthographic projection of the protective plate.

3. The battery device according to claim 1, characterized in that, The battery device further includes a second fastener, which is fixed to the housing and is threadedly connected to the first fastener.

4. The battery device according to claim 3, characterized in that, Along the thickness direction of the protective plate, the support member is disposed between the first fastener and the second fastener.

5. The battery device according to claim 3, characterized in that, The box body includes a frame and beams, the beams being disposed within the frame and connected to the frame; The first fastener includes a nut, and the second fastener includes a first sleeve. At least a portion of the first sleeve is disposed within the beam body, and the nut is sleeved on the outer periphery of the first sleeve and threadedly connected to the first sleeve. The support includes a first support, which is disposed between the nut and the first sleeve.

6. The battery device according to claim 5, characterized in that, Along the thickness direction of the protective plate, the protective plate has a first surface and a second surface disposed opposite to each other, the protective plate has a first through hole, the first through hole penetrates the first surface and the second surface, and the first support member is disposed in the first through hole.

7. The battery device according to claim 6, characterized in that, The protective panel includes a first fiber resin layer, a reinforcing layer, and a second fiber resin layer, which are stacked sequentially along its thickness direction, as well as a first edge sealing portion; Along the thickness direction of the protective plate, the surface of the first fiber resin layer facing away from the reinforcing layer is the first surface, and the surface of the second fiber resin layer facing away from the reinforcing layer is the second surface; The reinforcing layer has a second through hole surrounding the first through hole. The first sealing portion is annular. The outer peripheral surface of the first sealing portion connects to the inner peripheral surface of the second through hole and connects the first fiber resin layer and the second fiber resin layer. The first support member passes through the first sealing portion.

8. The battery device according to claim 7, characterized in that, The material of the first edge sealing part includes resin or fiber resin.

9. The battery device according to claim 5, characterized in that, The first support member is integrally formed with the nut.

10. The battery device according to claim 5, characterized in that, The first support member is annular, and the inner diameter of the first support member is larger than the inner diameter of the nut.

11. The battery device according to claim 5, characterized in that, The first sleeve includes a cylinder and a flange. The flange protrudes from the outer circumferential surface of the cylinder. Along the thickness direction of the protective plate, a portion of the protective plate and the first support member are located between the flange and the nut.

12. The battery device according to claim 11, characterized in that, The battery device further includes a first seal, which is annular and disposed between the flange and the protective plate.

13. The battery device according to claim 12, characterized in that, The flange has a first end face facing the protective plate, the first end face is provided with a first groove, and the first sealing element is disposed in the first groove.

14. The battery device according to claim 13, characterized in that, The first groove extends to the outer peripheral surface of the flange.

15. The battery device according to claim 13, characterized in that, The depth of the first groove is H, which satisfies: 1mm≤H≤3mm.

16. The battery device according to claim 12, characterized in that, The outer diameter of the first seal is D1, and the inner diameter of the first seal is D2, satisfying the following:

17. The battery device according to claim 12, characterized in that, The first seal has a third surface that contacts the flange and a fourth surface that contacts the protective plate. When the first seal is in its natural state, both the third and fourth surfaces are planar.

18. The battery device according to any one of claims 12-17, characterized in that, The compression ratio of the first seal is Yb, which satisfies: 30% ≤ Yb ≤ 70%.

19. The battery device according to claim 12, characterized in that, The housing also includes a thermal management component for supporting the battery cell. Along the thickness direction of the protective plate, the protective plate is located on the side of the thermal management component away from the battery cell, and the flange is located between the protective plate and the thermal management component. The battery device further includes a second seal, which is annular and disposed between the flange and the thermal management component; the inner diameter of the first seal is larger than the outer diameter of the second seal.

20. The battery device according to claim 5, characterized in that, Along the thickness direction of the protective plate, neither the nut nor the first sleeve extends beyond the surface of the protective plate away from the battery cell.

21. The battery device according to claim 1, characterized in that, The enclosure includes a frame, the protective plate includes a body and a flange, the flange surrounds the body, the first fastener includes a first screw, the first screw connects the flange to the frame, and the support includes a second support, the second support is disposed between the flange and the frame.

22. The battery device according to claim 21, characterized in that, The first screw includes a nut and a screw rod, and the second support member is sleeved on the outer periphery of the screw rod. Along the thickness direction of the protective plate, the second support member is located between the nut and the frame.

23. The battery device according to claim 22, characterized in that, Along the thickness direction of the protective plate, the protective plate has a first surface and a second surface disposed opposite to each other, and the protective plate has a third through hole that penetrates the first surface and the second surface, and the second support member is disposed in the third through hole.

24. The battery device according to claim 23, characterized in that, The second support member is an open ring.

25. The battery device according to claim 24, characterized in that, In the thickness direction of the protective plate, the thickness of the opening ring is greater than the thickness of the protective plate.

26. The battery device according to claim 23, characterized in that, The battery device further includes a third seal disposed between the flange edge and the frame.

27. The battery device according to claim 23, characterized in that, Multiple third through holes are provided, and the multiple third through holes are spaced apart circumferentially along the flange edge. The distance between two adjacent third through holes is L1, which satisfies: 70mm≤L1≤90mm.

28. The battery device according to claim 23, characterized in that, The flange edge includes an adjacent first sub-flange edge and a second sub-flange edge, the first sub-flange edge having a first outer edge and the second sub-flange edge having a second outer edge; The third through hole is provided in multiple ways, including multiple first through holes provided on the side of the first sub-flange and multiple second through holes provided on the side of the second sub-flange; The distance between the first sub-through hole closest to the second outer edge and the second outer edge is L2, which satisfies: 20mm≤L2≤35mm; The distance between the second sub-through hole closest to the first outer edge and the first outer edge is L3, which satisfies: 20mm≤L3≤35mm.

29. The battery device according to claim 26, characterized in that, The third sealing element is annular and has a third through hole through which the first screw passes. The minimum distance between the third through hole and the inner circumferential surface of the third sealing element is W, which satisfies the condition: 7mm≤W≤10mm.

30. The battery device according to claim 21, characterized in that, The battery device further includes a second fastener, the second fastener including a threaded sleeve that is threadedly connected to the first screw, and at least a portion of the threaded sleeve being disposed within the frame; The second support is disposed between the first screw and the threaded sleeve.

31. The battery device according to claim 21, characterized in that, The protective panel includes a first fiber resin layer, a reinforcing layer, and a second fiber resin layer, which are stacked sequentially along its thickness direction, as well as a second edge sealing portion; The reinforcing layer has a fifth surface and a sixth surface opposite to each other along its thickness direction, and an outer peripheral surface connecting the fifth surface and the sixth surface. The second sealing portion covers the outer peripheral surface of the reinforcing layer and connects the first fiber resin layer and the second fiber resin layer. The second support member passes through the second sealing portion.

32. The battery device according to claim 31, characterized in that, The material of the second edge sealing part includes resin or fiber resin.

33. The battery device according to claim 7, characterized in that, The reinforcing layer is made of at least one of steel, titanium, ceramic, and high-strength plastic.

34. The battery device according to claim 1, characterized in that, The enclosure includes a frame and a beam, the beam being disposed within and connected to the frame, and the protective plate including a body and a flange, the flange surrounding the body; The first fastener includes a nut and a first screw, and the battery device further includes a second fastener, which includes a first sleeve and a threaded sleeve. At least a portion of the first sleeve is disposed within the beam body, the nut is sleeved on the outer periphery of the first sleeve and threadedly connected to the first sleeve; at least a portion of the threaded sleeve is disposed within the frame, and the threaded sleeve is threadedly connected to the first screw. The support includes a first support and a second support. The first support is disposed between the nut and the first sleeve, and the second support is disposed between the flange edge and the frame.

35. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-34, the battery device being used to provide electrical energy.

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