Battery pack and electronic device

Abstract

The application provides a battery pack and an electronic device. The battery pack comprises a box body having a containing cavity; a plurality of cell assemblies are located in the containing cavity, the plurality of cell assemblies are arranged at intervals along a first direction, the cell assembly comprises a plurality of cell bodies, and the plurality of cell bodies are arranged at intervals along a second direction; and an adjusting assembly comprises at least two first adjusting pieces, the at least two first adjusting pieces are located on opposite sides of the cell assembly along the second direction, and the first adjusting piece is configured to be movably connected to an inner wall of the box body, so that the distance between at least two cell bodies in the same cell assembly is adjustable; and the first direction and the second direction have an included angle. The pre-tightening force of the cell assembly can be dynamically adjusted according to needs, and the performance of the battery is improved.

Description

Technical Field

[0001] This application relates to a battery pack and electronic device, belonging to the field of new energy battery technology. Background Technology

[0002] All-Solid-State Batteries (ASSBs) represent a significant innovation in battery technology. In recent years, with advancements in materials science and nanotechnology, the development of all-solid-state batteries has made remarkable progress.

[0003] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: Since all-solid-state cells require an initial preload to help maintain the stability of cell performance, the current packing design uses an end-side plate design or an end plate and cable tie design to apply the initial preload to the cells, resulting in the preload remaining unchanged after packing, and poor overall pack performance during long-term use.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] This application provides a battery pack and electronic device in which the preload force after the battery cells are assembled can be dynamically adjusted, thereby improving the performance of the battery.

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

[0007] The box-shaped enclosure has a receiving cavity;

[0008] Multiple battery cell assemblies are located within a receiving cavity. The multiple battery cell assemblies are spaced apart along a first direction. Each battery cell assembly includes multiple battery cell bodies, which are spaced apart along a second direction.

[0009] An adjustment assembly includes at least two first adjustment members along a second direction, the at least two first adjustment members being located on opposite sides of the cell assembly, the first adjustment members being configured to be movably connected to the inner wall of the housing so that the distance between at least two cell bodies in the same cell assembly is adjustable;

[0010] There is an angle between the first direction and the second direction.

[0011] The beneficial effects of this application are: by adding adjustment components, the distance between multiple cell bodies can be adjusted after the cell assembly is assembled, and the design of the first adjustment component allows the pre-tightening force after the cells are assembled to be dynamically adjusted as needed, thereby improving battery performance; in addition, it allows for quick disassembly and replacement of cell bodies, simplifies the maintenance and replacement process, improves the flexibility of the battery pack, and reduces the time and cost of maintenance and replacement.

[0012] In some alternative implementations, the battery pack also includes a plurality of first thermal insulation buffers;

[0013] Along the second direction, the first thermal insulation buffer is located between two adjacent cell bodies in the same cell assembly.

[0014] It should be noted that the placement of the first heat insulation buffer between the battery cells forms an effective heat insulation barrier, reducing heat conduction between the battery cells and helping to prevent one battery cell from overheating and affecting adjacent cells, thereby improving the thermal management capability of the entire battery pack.

[0015] In some alternative embodiments, the first thermal insulation buffer includes a buffer plate and a thermal insulation layer disposed on the buffer plate.

[0016] It should be noted that the buffer plate provides mechanical support and cushioning, effectively absorbing and dispersing mechanical stress and vibration between the battery cells; while the thermal insulation layer focuses on thermal management, providing excellent thermal insulation performance.

[0017] In some alternative implementations, the buffer plate is a honeycomb plate; and / or,

[0018] The thermal insulation layer is a nano-aerogel layer.

[0019] It should be noted that honeycomb panel structures are known for their high strength and low weight. By using honeycomb panels, the battery pack can provide sufficient mechanical strength and support without increasing weight, contributing to the lightweight design of the overall system.

[0020] In some alternative embodiments, the housing includes a frame and a plurality of crossbeams, which are spaced apart along a first direction from the frame.

[0021] The first adjusting element is movably connected to the end of the crossbeam.

[0022] It should be noted that the combination of frame and crossbeams provides a robust structural foundation, ensuring the mechanical stability of the battery pack under various operating conditions.

[0023] In some alternative embodiments, a limiting block is provided on the crossbeam, which extends along the thickness direction of the battery pack to abut against the outer wall of the first thermal insulation buffer.

[0024] It should be noted that the limiting block ensures the precise positioning of the first thermal insulation buffer within the battery pack. By extending along the thickness direction, the limiting block effectively prevents displacement or sliding of the buffer, ensuring the stable arrangement of the battery cell assembly.

[0025] In some alternative implementations, the adjustment assembly further includes a second adjustment element;

[0026] The first adjusting member has a first adjusting hole that extends along the second direction. The crossbeam has a mounting hole. The second adjusting member passes through the first adjusting hole and the mounting hole, and the position of the second adjusting member within the first adjusting hole is adjustable.

[0027] It should be noted that the first adjustment hole provided on the first adjustment member extends along the second direction, allowing the second adjustment member to move therein, providing precise adjustment capability, so that the distance between the battery cell assemblies can be finely adjusted as needed, optimizing the arrangement and contact pressure of the battery cells.

[0028] In some alternative implementations, the frame includes a first frame, a second frame, and a bottom guard plate;

[0029] There are at least two first borders and at least two second borders, and the at least two first borders and at least two second borders are connected and surround the outer perimeter of the bottom protective plate, wherein the length of the first border is greater than the length of the second border.

[0030] The crossbeam connects the two first side frames.

[0031] It should be noted that the first and second frames surround the outer perimeter of the bottom protective plate, forming a closed frame structure. The length of the first frame is greater than the length of the second frame. This design provides a larger support area and structural strength, ensuring the stability of the battery pack under various operating conditions.

[0032] In some alternative implementations, the battery pack also includes multiple second thermal insulation buffers;

[0033] Along the second direction, the second thermal insulation buffer is located between the cell body and the first adjustment member.

[0034] It should be noted that the placement of the second heat insulation buffer between the cell body and the first regulating component forms an additional heat insulation layer, which helps to reduce heat conduction from the cell to the regulating component, maintain the temperature stability inside the battery pack, and improve the overall thermal management efficiency.

[0035] In addition, this application also provides an electronic device including the aforementioned battery pack.

[0036] The battery pack and electronic device provided in this application include the aforementioned battery pack; the battery pack includes a housing with a receiving cavity; a plurality of battery cell assemblies are located within the receiving cavity, the plurality of battery cell assemblies are spaced apart along a first direction, the battery cell assembly includes a plurality of battery cell bodies, the plurality of battery cell bodies are spaced apart along a second direction; an adjustment assembly includes at least two first adjustment members along the second direction, the at least two first adjustment members are located on opposite sides of the battery cell assembly, the first adjustment members are configured to be movably connected to the inner wall of the housing so that the distance between at least two battery cell bodies in the same battery cell assembly is adjustable; wherein, there is an included angle between the first direction and the second direction.

[0037] By adding adjustment components, the distance between multiple cell bodies can be adjusted after the cell assembly is completed, through the design of the first adjustment component. This allows the preload of the assembled cells to be dynamically adjusted as needed, improving battery performance. In addition, it allows for quick disassembly and replacement of cell bodies, simplifying the maintenance and replacement process, increasing the flexibility of the battery pack, and reducing maintenance and replacement time and costs. Attached Figure Description

[0038] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0039] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the arrangement of crossbeams in the battery pack according to an embodiment of this application;

[0041] Figure 3 This is an exploded view of the battery pack according to an embodiment of this application;

[0042] Figure 4 for Figure 3 A magnified view of a portion of point I in the middle;

[0043] Figure 5 This is a partial explosion diagram of the battery pack according to an embodiment of this application;

[0044] Figure 6 for Figure 5 A magnified view of a section at point II;

[0045] Figure 7 This is a schematic diagram of the structure of the first or second heat insulation buffer in the battery pack according to an embodiment of this application from a first-view perspective.

[0046] Figure 8This is a structural schematic diagram of the first or second heat insulation buffer in the battery pack according to an embodiment of this application, viewed from a second perspective.

[0047] Figure 9 This is a top view of the battery pack according to an embodiment of this application;

[0048] Figure 10 for Figure 9 A magnified view of a portion of point III;

[0049] Figure 11 for Figure 9 A magnified view of a portion of point IV in the middle.

[0050] Figure label:

[0051] 100-battery pack;

[0052] 110 - Enclosure;

[0053] 111-Framework;

[0054] 1111 - First border;

[0055] 1112 - Second border;

[0056] 1113 - Bottom guard plate;

[0057] 112-Crossbeam;

[0058] 1121 - Limit Block;

[0059] 1122 - Mounting hole;

[0060] 120 - Battery cell assembly;

[0061] 121 - Battery cell body;

[0062] 130 - Adjustment component;

[0063] 131 - First adjusting component;

[0064] 1311 - First adjusting hole;

[0065] 140 - First thermal insulation buffer;

[0066] 141-Buffer plate;

[0067] 150 - Second thermal insulation buffer. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0069] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0070] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: Since all-solid-state cells require an initial preload to help maintain the stability of cell performance, the current packing design uses an end-side plate design or an end plate and cable tie design to apply the initial preload to the cells, resulting in the preload remaining unchanged after packing, and poor overall pack performance during long-term use.

[0073] The battery pack proposed in this application, through the addition of an adjustment component, allows for adjustment of the distance between multiple battery cell bodies after the cell assembly is completed. This enables dynamic adjustment of the preload force after the cells are assembled, improving battery performance. Furthermore, it allows for quick disassembly and replacement of the battery cell bodies, simplifying the maintenance and replacement process, increasing the flexibility of the battery pack, and reducing maintenance and replacement time and costs.

[0074] The battery pack provided in this application will be described in detail below with reference to specific embodiments.

[0075] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of this application. Figure 2 This is a schematic diagram of the arrangement of crossbeams in the battery pack according to an embodiment of this application. Figure 3 This is an exploded view of the battery pack according to an embodiment of this application. Figure 4 for Figure 3 A magnified view of a portion of point I in the middle. Figure 5 This is a partial exploded view of the battery pack according to an embodiment of this application. Figure 6 for Figure 5 A magnified view of a portion of point II.

[0076] like Figures 1 to 6 As shown in the figure, this application embodiment proposes a battery pack 100, including:

[0077] Box 110 has a receiving cavity;

[0078] Multiple battery cell assemblies 120 are located within a receiving cavity. The multiple battery cell assemblies 120 are spaced apart along a first direction. Each battery cell assembly 120 includes multiple battery cell bodies 121. The multiple battery cell bodies 121 are spaced apart along a second direction.

[0079] The adjustment assembly 130 includes at least two first adjustment members 131 located on opposite sides of the cell assembly 120 along a second direction. The first adjustment members 131 are configured to be movably connected to the inner wall of the housing 110 so that the distance between at least two cell bodies 121 in the same cell assembly 120 is adjustable.

[0080] There is an angle between the first direction and the second direction.

[0081] It should be noted that X represents the length direction of the battery pack 100, Y represents the width direction of the battery pack 100, and Z represents the thickness direction of the battery pack 100.

[0082] In this embodiment, the first direction can be the length direction of the battery pack 100, and the second direction can be the width direction of the battery pack 100.

[0083] In some examples, the housing 110 can be a rectangular structure, and the size of the housing 110 can be greater than or equal to the size of the cell assembly 120, so that the housing 110 can support the cell assembly 120.

[0084] It is understandable that the function of the receiving cavity is to house the battery cell assembly 120. It is easy to understand that the receiving cavity is sealed to prevent side reactions from occurring in the internal system of the battery cell assembly 120, which would affect the performance of the battery cell assembly 120.

[0085] For example, the size or shape of the receiving cavity is matched with the size and shape of the battery cell assembly 120. Specifically, it can be adjusted according to the actual situation. This application embodiment does not impose too many limitations here.

[0086] In this embodiment, the cell assembly 120 can be configured as a rectangular structure. The cell assembly 120 can be located inside the housing 110.

[0087] Understandably, the housing 110 can be used to support the battery cell assembly 120.

[0088] The dimensions of the aforementioned housing 110 can be set according to actual needs, and this embodiment of the application does not impose any restrictions on them.

[0089] In addition, it should be noted that the shape of the box 110 is not limited in this embodiment. For example, the box 110 can be a regular shape such as a cuboid or a cylinder. Of course, the box 110 can also be other irregular shapes.

[0090] It should be noted that the cell body 121 is the smallest charging and discharging unit. The cell body 121 has a positive electrode, a negative electrode, and a separator disposed between the two, and is formed by winding or stacking.

[0091] The positive electrode sheet includes a positive current collector and a positive active material layer, which can be one or two layers; that is, the positive active material layer is located on one side of the positive current collector, or the positive active material layer is located on opposite sides of the positive current collector.

[0092] For example, the positive current collector can be made of metal materials such as aluminum foil, nickel foil, or stainless steel, or a composite foil formed by combining metal and insulating materials.

[0093] For example, the positive electrode active material layer includes a positive electrode active material, a conductive agent, a binder, etc., and the positive electrode active material includes one or more lithium-containing positive electrode active materials such as lithium iron phosphate, ternary materials containing nickel, cobalt, and manganese, and lithium manganese iron phosphate.

[0094] Similarly, the negative electrode sheet includes a negative current collector and a negative active material layer, which can be one or two layers; that is, the negative active material layer is located on one side of the negative current collector, or the negative active material layer is located on opposite sides of the negative current collector.

[0095] For example, the negative electrode current collector can be made of metal materials such as copper foil, aluminum foil, or stainless steel, or it can be a composite foil material formed by combining metal and insulating materials.

[0096] For example, the negative electrode active material layer includes a negative electrode active material, a conductive agent, a binder, etc., and the negative electrode active material includes one or more of the following: artificial graphite, natural graphite, silicon carbide, silicon oxide, lithium titanate, etc.

[0097] The tab serves as the current output terminal of the battery cell. The tab is either integrated with or separately connected to the positive or negative electrode.

[0098] The separator, as an insulating layer, is used to prevent short circuits inside the battery pack 100 cells caused by contact between the positive and negative electrode plates. As a semi-permeable layer, the separator prevents larger molecules from passing through while allowing smaller charged ions to pass through.

[0099] It should be noted that since all-solid-state cells require an initial preload to help maintain the stability of cell performance, an adjustment component 130 is added. Through the adjustment action of the first adjustment component 131, after the cell assembly 120 is installed, the distance between at least two cell bodies 121 in the same cell assembly 120 can be adjusted, and the preload can be dynamically adjusted.

[0100] With the above-mentioned configuration, namely, by adding the adjustment component 130, after the cell assembly 120 is assembled, the distance between multiple cell bodies 121 can be adjusted by the design of the first adjustment component 131, so that the pre-tightening force after the cells are assembled can be dynamically adjusted as needed, thereby improving the performance of the battery. In addition, it allows for quick disassembly and replacement of the cell bodies 121, simplifies the maintenance and replacement process, improves the flexibility of the battery pack 100, and reduces the time and cost of maintenance and replacement.

[0101] Figure 7 This is a schematic diagram of the structure of the first or second heat-insulating buffer in the battery pack according to an embodiment of this application, viewed from a first perspective. Figure 8This is a structural schematic diagram of the first or second heat insulation buffer in the battery pack according to an embodiment of this application, viewed from a second perspective.

[0102] like Figures 1 to 8 As shown, in some alternative embodiments, the battery pack 100 also includes a plurality of first thermal insulation buffers 140;

[0103] Along the second direction, the first thermal insulation buffer 140 is located between two adjacent cell bodies 121 in the same cell assembly 120.

[0104] It should be noted that the placement of the first heat insulation buffer 140 between the cell bodies 121 forms an effective heat insulation barrier, reduces heat conduction between the cell bodies 121, helps prevent an overheated cell from affecting adjacent cells, thereby improving the thermal management capability of the entire battery pack 100.

[0105] The first thermal insulation buffer 140 not only provides thermal insulation, but also absorbs and buffers mechanical stress and vibration between battery cells to a certain extent.

[0106] By limiting the transfer of heat between the cell bodies 121, the first heat insulation buffer 140 helps maintain the temperature uniformity inside the battery pack 100 and avoids local overheating.

[0107] In some alternative embodiments, the first thermal insulation buffer 140 includes a buffer plate 141 and a thermal insulation layer disposed on the buffer plate 141.

[0108] It should be noted that the buffer plate 141 provides mechanical support and buffering functions, which can effectively absorb and disperse mechanical stress and vibration between the cells; the thermal insulation layer focuses on thermal management and provides excellent thermal insulation performance.

[0109] The presence of the thermal insulation layer effectively reduces heat conduction between the battery cells 121, preventing heat from spreading rapidly between the cells.

[0110] The structural design of the buffer plate 141 provides additional mechanical stability, preventing the battery cell from shifting or being damaged due to vibration or impact during use.

[0111] In some alternative embodiments, the buffer plate 141 is a honeycomb plate; and / or,

[0112] The thermal insulation layer is a nano-aerogel layer.

[0113] It should be noted that honeycomb panel structures are known for their high strength and low weight. By using honeycomb panels, the battery pack 100 can provide sufficient mechanical strength and support without increasing weight, contributing to the lightweight design of the overall system.

[0114] The honeycomb structure effectively absorbs and disperses external impact and vibration energy, allowing air to circulate within it, which helps dissipate heat. Combined with an insulation layer, the honeycomb panel can optimize the thermal management performance of the battery pack 100 while providing mechanical protection.

[0115] In addition, the geometry of the honeycomb panel provides excellent rigidity and stability, preventing the cells from shifting or deforming during use, thereby improving the structural integrity of the battery pack 100.

[0116] It should be noted that by using a nano-aerogel layer, the battery pack 100 can significantly reduce heat conduction between cells, improve thermal management efficiency, and maintain temperature stability inside the battery pack 100.

[0117] Nano-aerogels have extremely low density, which allows them to provide excellent thermal insulation performance without significantly increasing the weight of the battery pack 100, thus contributing to a lightweight design. Due to the highly efficient thermal insulation properties of nano-aerogels, the required material thickness can be significantly reduced, thereby saving internal space in the battery pack 100 and allowing for a more compact design.

[0118] like Figures 1 to 6 As shown, in some optional embodiments, the housing 110 includes a frame 111 and a plurality of crossbeams 112, which are spaced apart from the frame 111 along a first direction.

[0119] The first adjusting member 131 is movably connected to the end of the crossbeam 112.

[0120] It should be noted that the combination of frame 111 and crossbeam 112 provides a robust structural foundation, ensuring the mechanical stability of battery pack 100 under various operating conditions.

[0121] The first adjusting member 131 is movably connected to the end of the crossbeam 112, allowing the adjusting member to move flexibly on the crossbeam 112, precisely adjusting the preload of the cell assembly 120, adapting to different cell sizes and arrangements, and improving the adaptability and flexibility of the battery pack 100.

[0122] Furthermore, the spacing of multiple crossbeams 112 and the flexible connection of the adjusting components optimize the use of the internal space of the battery pack 100, ensuring the compact arrangement of the cell assembly 120 while providing the necessary heat dissipation and buffer space.

[0123] Figure 9 This is a top view of the battery pack according to an embodiment of this application. Figure 10 for Figure 9 A magnified view of a portion of point III. Figure 11 for Figure 9 A magnified view of a portion of point IV in the middle.

[0124] like Figures 1 to 11 As shown, in some optional embodiments, a limiting block 1121 is provided on the crossbeam 112, the limiting block 1121 extending along the thickness direction of the battery pack 100 to abut against the outer wall of the first heat insulation buffer 140.

[0125] It should be noted that the setting of the limiting block 1121 ensures the precise positioning of the first heat insulation buffer 140 in the battery pack 100. By extending along the thickness direction, the limiting block 1121 effectively prevents the buffer from shifting or sliding, ensuring the stable arrangement of the cell assembly 120.

[0126] The limiting block 1121 abuts against the outer wall of the first thermal insulation buffer 140, providing additional protection to prevent the buffer from being deformed or damaged by external forces, and ensuring the effectiveness of its thermal insulation and buffering functions.

[0127] In addition, the design of the limiting block 1121 makes the installation process of the first heat insulation buffer 140 simpler and faster, reduces installation time and complexity, and improves production efficiency.

[0128] In some embodiments, there are multiple limiting blocks 1121, and the multiple limiting blocks 1121 are spaced apart along the second direction Y.

[0129] Furthermore, along the first direction X, the limiting blocks 1121 are located on opposite sides of the same crossbeam 112 to limit the different first thermal insulation buffers 140.

[0130] In some embodiments, the limiting block 1121 can be an arc-shaped protrusion, but this is not a limitation.

[0131] In some embodiments, the limiting block 1121 and the crossbeam 112 are integrally formed.

[0132] In some alternative embodiments, the adjustment assembly 130 further includes a second adjustment element;

[0133] The first adjusting member 131 has a first adjusting hole 1311 extending along the second direction. The crossbeam 112 has a mounting hole 1122. The second adjusting member passes through the first adjusting hole 1311 and the mounting hole 1122, and the position of the second adjusting member within the first adjusting hole 1311 is adjustable.

[0134] It should be noted that the first adjustment hole 1311 provided on the first adjustment member 131 extends along the second direction, allowing the second adjustment member to move therein, providing precise adjustment capability, so that the distance between the cell assemblies 120 can be finely adjusted as needed, optimizing the arrangement and contact pressure of the cells.

[0135] The second adjustment member passes through the first adjustment hole 1311 and the mounting hole 1122 on the crossbeam 112. Its position is adjustable within the first adjustment hole 1311, allowing for quick adjustment of the layout of the cell assembly 120 to accommodate cells of different sizes and types, thus improving the adaptability of the battery pack 100.

[0136] In addition, the second adjustment component not only provides adjustment function, but also plays a role in fixing the cell assembly 120, enhancing the overall structural stability of the battery pack 100 and preventing the cells from shifting during use.

[0137] In some embodiments, the second adjusting member may be an adjusting bolt.

[0138] In some alternative embodiments, the frame 111 includes a first frame 1111, a second frame 1112, and a bottom guard plate 1113;

[0139] There are at least two first borders 1111 and at least two second borders 1112, and at least two first borders 1111 and at least two second borders 1112 are connected and surround the outer perimeter of the bottom guard plate 1113, wherein the length of the first border 1111 is greater than the length of the second border 1112.

[0140] The crossbeam 112 is connected between the two first frame frames 1111.

[0141] It should be noted that the first frame 1111 and the second frame 1112 surround the outer perimeter of the bottom protective plate 1113, forming a closed frame structure 111. The length of the first frame 1111 is greater than the length of the second frame 1112. This design provides a larger support area and structural strength, ensuring the stability of the battery pack 100 under various operating conditions.

[0142] The crossbeam 112 connects the two first frame frames 1111, providing stable support and fixing points. It not only optimizes the utilization of the internal space of the battery pack 100, but also ensures the compact arrangement of the cell assembly 120, while providing the necessary heat dissipation and buffer space.

[0143] The bottom protection plate 1113 provides additional protection for the battery pack 100, preventing the external environment from directly affecting the battery cells and enhancing the durability and safety of the battery pack 100.

[0144] In some alternative embodiments, the battery pack 100 also includes a plurality of second thermal insulation buffers 150;

[0145] Along the second direction, the second heat insulation buffer 150 is located between the cell body 121 and the first adjustment member 131.

[0146] It should be noted that the second heat insulation buffer 150 is set between the cell body 121 and the first adjustment member 131 to form an additional heat insulation layer, which helps to reduce the heat conduction from the cell to the adjustment assembly 130, maintain the temperature stability inside the battery pack 100, and improve the overall thermal management efficiency.

[0147] The second heat insulation buffer 150 not only provides heat insulation but also provides mechanical buffering between the battery cell and the regulating component, reducing the mechanical stress on the battery cell caused by vibration or impact and improving the durability of the battery pack 100.

[0148] In some embodiments, the structure of the second heat insulation buffer 150 can refer to the structure of the first heat insulation buffer 140 described above, except that the position is different. Here, the specific structure of the second heat insulation buffer 150 will not be described in detail.

[0149] The battery pack provided in this application embodiment includes a housing with a receiving cavity; a plurality of battery cell assemblies located within the receiving cavity, the plurality of battery cell assemblies being spaced apart along a first direction, each battery cell assembly including a plurality of battery cell bodies, the plurality of battery cell bodies being spaced apart along a second direction; and an adjustment assembly including at least two first adjustment members located on opposite sides of the battery cell assembly along the second direction, the first adjustment members being configured to be movably connected to the inner wall of the housing so that the distance between at least two battery cell bodies in the same battery cell assembly is adjustable; wherein, there is an included angle between the first direction and the second direction.

[0150] By adding adjustment components, the distance between multiple cell bodies can be adjusted after the cell assembly is completed, through the design of the first adjustment component. This allows the preload of the assembled cells to be dynamically adjusted as needed, improving battery performance. In addition, it allows for quick disassembly and replacement of cell bodies, simplifying the maintenance and replacement process, increasing the flexibility of the battery pack, and reducing maintenance and replacement time and costs.

[0151] In addition, this application also provides an electronic device including the battery pack 100 described above.

[0152] It should be noted that the specific structure of the battery pack 100 will not be discussed in detail here; please refer to the above.

[0153] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0154] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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. Such 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.

Claims

1. A battery pack (100), characterized in that, include: The housing (110) has a receiving cavity; Multiple battery cell assemblies (120) are located within the receiving cavity. The multiple battery cell assemblies (120) are spaced apart along a first direction. Each battery cell assembly (120) includes multiple battery cell bodies (121), which are spaced apart along a second direction. An adjustment assembly (130) includes at least two first adjustment members (131) along the second direction, the at least two first adjustment members (131) being located on opposite sides of the cell assembly (120), the first adjustment members (131) being configured to be movably connected to the inner wall of the housing (110) so that the distance between at least two cell bodies (121) in the same cell assembly (120) is adjustable; There is an angle between the first direction and the second direction.

2. The battery pack (100) according to claim 1, characterized in that, The battery pack (100) also includes a plurality of first thermal insulation buffers (140); Along the second direction, the first thermal insulation buffer (140) is located between two adjacent cell bodies (121) in the same cell assembly (120).

3. The battery pack (100) according to claim 2, characterized in that, The first heat insulation buffer (140) includes a buffer plate (141) and a heat insulation layer, wherein the heat insulation layer is disposed on the buffer plate (141).

4. The battery pack (100) according to claim 3, characterized in that, The buffer plate (141) is a honeycomb plate; and / or, The thermal insulation layer is a nano-aerogel layer.

5. The battery pack (100) according to any one of claims 2-4, characterized in that, The box body (110) includes a frame (111) and a plurality of crossbeams (112), and the plurality of crossbeams (112) are spaced apart from the frame (111) along the first direction; The first adjusting member (131) is movably connected to the end of the crossbeam (112).

6. The battery pack (100) according to claim 5, characterized in that, The crossbeam (112) is provided with a limiting block (1121), which extends along the thickness direction of the battery pack (100) to abut against the outer wall of the first heat insulation buffer (140).

7. The battery pack (100) according to claim 5, characterized in that, The adjustment assembly (130) further includes a second adjustment element; The first adjusting member (131) has a first adjusting hole (1311) extending along the second direction. The crossbeam (112) has a mounting hole (1122). The second adjusting member passes through the first adjusting hole (1311) and the mounting hole (1122), and the position of the second adjusting member within the first adjusting hole (1311) is adjustable.

8. The battery pack (100) according to claim 5, characterized in that, The frame (111) includes a first frame (1111), a second frame (1112), and a bottom guard plate (1113); The first frame (1111) and the second frame (1112) are at least two, at least two of the first frame (1111) and at least two of the second frame (1112) are connected and surround the outer periphery of the bottom guard plate (1113), wherein the length of the first frame (1111) is greater than the length of the second frame (1112); The crossbeam (112) is connected between the two first frame frames (1111).

9. The battery pack (100) according to any one of claims 2-4, characterized in that, The battery pack (100) also includes a plurality of second thermal insulation buffers (150); Along the second direction, the second heat insulation buffer (150) is located between the cell body (121) and the first adjustment member (131).

10. An electronic device, characterized in that, Includes the battery pack (100) as described in any one of claims 1 to 9.

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