Battery device and electric device

Abstract

The application provides a battery device and a power utilization device. The battery device comprises a box body, a plurality of battery cell assemblies and a pressing strip. The box body has a containing space. The battery cell assembly comprises a plurality of battery cells arranged along a first direction. The plurality of battery cell assemblies are arranged in the containing space along a second direction. The battery cells are respectively provided with protruding structures at positions corresponding to shoulder portions. The pressing strip comprises a first pressing strip. The first pressing strip comprises a middle portion and connecting portions respectively connected to two sides of the middle portion. Along the second direction, the middle portion is located in a region between the corresponding two protruding structures. The connecting portions are fixedly connected to the corresponding protruding structures. At least part of the middle portion is protrudingly arranged relative to the connecting portions towards one side of the battery cell. The pressing strip uses the first pressing strip. The middle portion protruding towards the battery cell is arranged between the two connecting portions of the first pressing strip. The anti-vibration capability of the first pressing strip along the second direction is improved. The risk of connection failure between the first pressing strip and the battery cell is reduced.

Description

Technical Field

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

[0002] 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.

[0003] Battery modules typically use retaining strips to connect the shoulders of adjacent rows of battery cells. However, for battery cells with raised structures on their shoulders, the retaining strips are prone to failure in connecting adjacent cells. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device to improve the problem of easy failure of the connection between two adjacent battery cells with protruding structures by the pressure bar in the related art.

[0005] In a first aspect, embodiments of this application provide a battery device, including:

[0006] The container has storage space;

[0007] Multiple battery cell assemblies, each battery cell assembly including multiple battery cells arranged along a first direction, the multiple battery cell assemblies being arranged in a receiving space along a second direction, and the top surface of the battery cell assembly having shoulders at both ends along the second direction.

[0008] A shoulder strip connects two adjacent shoulders;

[0009] Along the second direction, any two adjacent shoulder sections are connected by pressure strips; each battery cell has a protruding structure at the corresponding position on the shoulder, and the protruding structure is fixedly connected to the corresponding pressure strip;

[0010] The pressure strip includes a first pressure strip, which includes a middle portion and connecting portions connected to both sides of the middle portion along a second direction; along the second direction, the middle portion is located in the area between two corresponding protruding structures, and the connecting portions are fixedly connected to the corresponding protruding structures; at least a portion of the middle portion protrudes from the side of the connecting portion toward the battery cell.

[0011] In the technical solution of this application embodiment, the protruding structures of two adjacent battery cell assemblies are connected by a pressure strip to secure each battery cell. The pressure strip uses a first pressure strip, which has two connecting portions to connect the protruding structures of the two battery cell assemblies respectively, so as to facilitate the connection between the first pressure strip and the shoulder of the corresponding battery cell assembly. A middle portion is provided between the two connecting portions of the first pressure strip, and at least part of the middle portion protrudes towards one side of the battery cell. This not only makes good use of the space between the protruding structures of the two battery cells to improve the space utilization rate of the battery device, but also improves the vibration resistance of the first pressure strip along the second direction, thereby reducing the risk of connection failure between the first pressure strip and the battery cell.

[0012] In some embodiments, along the second direction and within the same battery cell, the top surface of the battery cell forms a sub-region on the side of each protrusion structure facing away from another protrusion structure; multiple sub-regions on the same side along the second direction in the battery cell assembly constitute a sub-region; the middle portion has a connecting surface facing the battery cell, and the connecting surface is bonded and fixed to the corresponding two sub-regions.

[0013] By using the above technical solution, the connecting surface of the middle part is bonded and fixed to the corresponding two sub-areas. This not only ensures a good connection of the middle part, but also improves the stability of the battery cell connection, thereby enhancing the structural strength of the battery device.

[0014] In some embodiments, the intermediate portion includes a first portion, the thickness of which is greater than the thickness of the connecting portion.

[0015] By using the above technical solution, setting the thickness of the first part to be greater than that of the connecting part can give the first part greater structural strength, so that the first part can resist vibration well; in addition, when the middle part is bonded and fixed to the battery cell, the battery cell can be connected and fixed more stably, thereby improving the structural strength of the battery device.

[0016] In some embodiments, the top surface of the first part is flush with the top surface of the connecting part.

[0017] By using the above technical solution, the top surface of the first part is made to be flush with the top surface of the connecting part, so that the first part can make full use of the space between the protruding structures of the two battery cells, thereby improving the space utilization rate of the battery device.

[0018] In some embodiments, the middle portion includes a second portion, which includes a first segment and a second segment extending from the first segment along both sides of a second direction toward a direction away from the battery cell. The second segments on both sides of the first segment are respectively connected to two connecting portions, and the connecting surfaces are provided on the first segment.

[0019] Through the above technical solution, the middle part uses a second part, and the first section in the middle of the second part is recessed in the direction of the division area. This not only simplifies the structure, but also allows it to deform well with vibration in the second direction, thereby improving vibration resistance. In addition, when the middle part is bonded and fixed to the battery cell, the second part can have a larger bonding area with the battery cell, thereby connecting and fixing the battery cell more stably and improving the structural strength of the battery device.

[0020] In some embodiments, the middle portion includes a third portion, which is curved in an arc shape, and the two sides of the third portion are respectively connected to two connecting portions.

[0021] The above technical solution uses an arc-shaped third part in the middle, which not only has a simple structure, but can also deform well with vibration in the second direction to improve vibration resistance.

[0022] In some embodiments, the pressure strip includes a second pressure strip, which is in the form of a flat strip.

[0023] The above technical solution uses a second pressing strip that is flat and has a simple structure, low cost, and is easy to process and manufacture.

[0024] In some embodiments, when there are three or more battery cell assemblies, two adjacent battery cell assemblies located at one end along the second direction are connected by a second pressure strip, and the second pressure strip connects the protruding structures of the corresponding two battery cell assemblies, while the remaining pressure strips are first pressure strips.

[0025] Through the above technical solution, since the battery cell assembly at the end along the second direction is closer to the beam of the housing, it can be supported more stably, reducing the vibration of the battery cell assembly. Correspondingly, the battery cell assembly is connected to the adjacent battery cell assembly using a second pressure strip, which simplifies the structure; while the remaining pressure strips use the first pressure strip, and the combination of the first and second pressure strips can reduce the risk of failure in the connection between the battery cell assembly and the pressure strip, thereby reducing costs.

[0026] In some embodiments, when there are four or more battery cell assemblies, two adjacent battery cell assemblies at each end along the second direction are connected by a second pressure strip, and the second pressure strip connects the protruding structures of the corresponding two battery cell assemblies, while the remaining pressure strips are first pressure strips.

[0027] The above technical solution uses second pressure strips at both ends of the second direction to simplify the structure and can cooperate with the beams at both ends of the box along the second direction to stably support the battery cell assembly at both ends of the second direction. The remaining pressure strips use first pressure strips, which reduces the risk of failure in the connection between the battery cell assembly and the pressure strips and reduces costs.

[0028] In some embodiments, the two pressure strips at both ends of the second direction are the second pressure strips, and the remaining pressure strips are the first pressure strips. The middle part of the first pressure strip includes a first part, the thickness of the first part is greater than the thickness of the connecting part, and the top surface of the first part is flush with the top surface of the connecting part.

[0029] Through the above technical solution, the second pressure strips are used at both ends of the second direction to simplify the structure and reduce costs, while the first pressure strips are used for the remaining pressure strips, resulting in a simple structure. The thickness of the first part is set to be greater than that of the connecting part, which can give the first part greater structural strength and enable it to resist vibration well. Setting the top surface of the first part to be flush with the top surface of the connecting part allows the first part to make full use of the space between the protruding structures of the two battery cells, thereby improving the space utilization rate of the battery device. In addition, when the middle part is bonded and fixed to the battery cell, the battery cell can be connected and fixed more stably, thereby improving the structural strength of the battery device.

[0030] In some embodiments, each battery cell has two electrode terminals spaced apart on its top surface along a second direction, and a protrusion structure is provided on the side of each electrode terminal facing away from the other electrode terminal on the top surface of the battery cell.

[0031] The above technical solution allows for easy positioning of the protruding structure, facilitating the processing and manufacturing of individual battery cells.

[0032] Secondly, embodiments of this application provide an electrical device, including a battery device as described in the above embodiments, the battery device being used to store or provide electrical energy.

[0033] 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 above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0036] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0037] Figure 3This is a schematic diagram of the battery device according to some embodiments of this application without the top cover;

[0038] Figure 4 for Figure 3 A cross-sectional view of the battery device along the second direction;

[0039] Figure 5 for Figure 4 Enlarged view of section A;

[0040] Figure 6 for Figure 5 A partial structural diagram of the first pressure strip in the middle;

[0041] Figure 7 This is a cross-sectional view of the battery device along a second direction, representing some other embodiments of this application.

[0042] Figure 8 for Figure 7 Enlarged view of section B;

[0043] Figure 9 for Figure 8 A partial structural diagram of the first pressure strip in the middle;

[0044] Figure 10 for Figure 7 Enlarged view of section C;

[0045] Figure 11 for Figure 10 A partial structural diagram of the first pressure strip in the middle;

[0046] Figure 12 for Figure 7 Enlarged view of section D;

[0047] Figure 13 This is a cross-sectional view of the battery device along a second direction, representing some embodiments of this application.

[0048] Figure 14 This is a cross-sectional view of the battery device along a second direction in some embodiments of this application;

[0049] Figure 15 This is a cross-sectional view of the battery device along a second direction, representing some other embodiments of this application.

[0050] Figure 16 This is a cross-sectional view of the battery device along a second direction in some embodiments of this application;

[0051] Figure 17 This is a cross-sectional view of the battery device along a second direction, representing some embodiments of this application.

[0052] The main markings in the attached figures are as follows:

[0053] 11. Vehicle; 111. Controller; 112. Motor;

[0054] 200. Battery unit; 20. Housing; 201. Accommodation space; 202. Beam; 21. Top cover; 22. Base plate; 23. Frame; 24. Limiting beam; 25. Mounting beam;

[0055] 300. Battery cell assembly; 301. Shoulder; 302. Sub-region; 30. Battery cell; 31. Electrode assembly; 32. Housing; 33. Electrode terminal; 34. Sub-shoulder; 341. Protruding structure; 342. Sub-region;

[0056] 40. Pressure strip; 41. First pressure strip; 411. Middle part; 4110. Connecting surface; 4111. First part; 4112. Second part; 41121. First section; 41122. Second section; 4113. Third part; 412. Connecting part; 42. Second pressure strip;

[0057] X, length direction; Y, width direction; Z, height direction; M, first direction; N, second direction. Detailed Implementation

[0058] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0059] 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.

[0060] 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0061] 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 in any suitable manner.

[0062] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0063] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0064] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0065] 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). "Several" means one or more, unless otherwise explicitly specified.

[0066] In the description of the embodiments of this application, the technical 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0067] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0068] In the description of the embodiments of this application, unless otherwise expressly specified and limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it may be directly connected to or indirectly connected to the other element.

[0069] In the description of the embodiments in this application, unless otherwise expressly specified and limited, the technical term "proximity" refers to being close in location. For example, among three components A1, A2, and B, the distance between A1 and B is greater than the distance between A2 and B. Therefore, A2 is closer to B than A1, meaning A2 is adjacent to B, or B is adjacent to A2. Similarly, when there are multiple components C, namely C1, C2, ..., C... N If one of the C components, such as C2, is closer to the B component than the other C components, then B is adjacent to C2, or C2 is adjacent to B.

[0070] A battery assembly typically includes a housing and multiple battery cell assemblies installed within the housing, each assembly comprising multiple battery cells. To improve the stability of the battery cell installation and the structural strength of the battery assembly, a retaining strip is used to connect the shoulders of adjacent battery cell assemblies. In some embodiments, protruding structures are often provided at both ends of the battery cells, allowing for the placement of absorbent material within these protrusions to absorb gases generated during charging and discharging, thereby improving battery cell safety. However, this protruding structure design requires the retaining strip to connect to the protruding structures of two adjacent battery cells on both sides, leaving the middle of the retaining strip suspended. Consequently, when the battery cell assembly is subjected to vibration along the arrangement direction of the multiple battery cell assemblies, the middle of the retaining strip is prone to deformation, leading to fatigue fracture and potential failure of the retaining strip connection to adjacent battery cells.

[0071] Based on the above considerations, in order to improve the problem of easy failure of the connection between the pressure strip and two adjacent battery cells with protruding structures in related technologies, this application provides a battery device in which multiple battery cells are arranged along a first direction to form a battery cell assembly, and multiple battery cell assemblies are arranged along a second direction. Pressure strips are set to connect two adjacent battery cell assemblies to improve the structural stability of adjacent battery cell assemblies. The pressure strip uses a first pressure strip, which has two connecting parts to connect the protruding structures of two battery cell assemblies respectively, so as to facilitate the connection between the first pressure strip and the shoulder of the corresponding battery cell assembly. A middle part is set between the two connecting parts of the first pressure strip, and the middle part is convex towards the direction of the battery cell to improve the vibration resistance of the first pressure strip along the second direction, thereby reducing the risk of fatigue fracture of the first pressure strip under vibration, and thus reducing the risk of connection failure between the first pressure strip and the battery cell.

[0072] 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.

[0073] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0074] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0075] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0076] For ease of explanation, an electrical device is provided in one embodiment of this application, which is illustrated using a vehicle as an example.

[0077] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 11 provided in some embodiments of this application. The vehicle 11 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 200 is provided inside the vehicle 11, and the battery device 200 can be located at the bottom, front, or rear of the vehicle 11. The battery device 200 can be used to power the vehicle 11; for example, the battery device 200 can serve as the operating power source for the vehicle 11. The vehicle 11 may also include a controller 111 and a motor 112. The controller 111 is used to control the battery device 200 to supply power to the motor 112, for example, to meet the power needs of the vehicle 11 during starting, navigation, and driving.

[0078] In some embodiments, the battery device 200 can not only serve as the operating power source for the vehicle 11, but also as the driving power source for the vehicle 11, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 11.

[0079] Please refer to Figure 2 The battery device 200 mentioned in the embodiments of this application may include one or more battery cell assemblies 300 for providing voltage and capacity. The battery cell assembly 300 may include multiple battery cells 30, which are connected in series, parallel or mixed connection through a busbar.

[0080] In some embodiments, the battery cell assembly 300 is typically formed by arranging multiple battery cells 30.

[0081] As an example, the battery cell assembly 300 can be a battery module, which is formed by arranging and fixing multiple battery cells 30 together. As an example, the battery module can be formed by bundling multiple battery cells 30 together with cable ties.

[0082] In some embodiments, the battery device 200 may be a battery pack, which includes a housing 20 and one or more battery cell assemblies 300, the battery cell assemblies 300 being housed in the housing 20.

[0083] As an example, the battery cell assembly 300 can be a battery module, which can be housed in the housing 20 by fixing the battery module in the housing 20.

[0084] As an example, the battery cell assembly 300 can also be housed in the housing 20 by directly fixing multiple battery cells 30 to the housing 20.

[0085] As an example, the housing 20 may include a top cover 21, a frame 23, and a bottom plate 22. The top cover 21 and the bottom plate 22 are respectively connected to opposite sides of the frame 23, so that the interior of the housing 20 forms a closed receiving space 201 to accommodate the battery cells 30. Here, "closed" means covered or closed, which can be sealed or unsealed. The frame 23 refers to the partial structure forming the peripheral sidewall of the housing 20, the top cover 21 refers to the plate-like structure forming the top of the housing 20, and the bottom plate 22 refers to the plate-like structure forming the bottom of the housing 20.

[0086] In some embodiments, the housing 20 includes a limiting beam 24 installed inside the housing 20 to increase the structural strength of the housing 20 and to support the battery cells 30, thereby limiting the expansion deformation of the battery cells 30. In some embodiments, the frame 23 can also be used directly to support the battery cells 30 to limit the expansion deformation of the battery cells 30, thus eliminating the need for a separate limiting beam 24.

[0087] In some embodiments, where the box 20 includes a frame 23, the frame 23 may be referred to as the beam 202 of the box 20.

[0088] In some embodiments, when the box body 20 includes a limiting beam 24, the limiting beam 24 may be referred to as the beam body 202 of the box body 20.

[0089] In some embodiments, when the box body 20 includes a limiting beam 24 of the frame 23, the frame 23 and the limiting beam 24 can be collectively referred to as the beam body 202 of the box body 20.

[0090] In some embodiments, the housing 20 includes a mounting beam 25, which is fixedly connected to the frame 23 for connecting an external device using the battery device 200 to support the battery device 200 on the device.

[0091] As an example, the housing 20 may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0092] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0093] Please see Figure 2 The box 20 has length, width, and height directions, such as Figure 2As shown, the X direction represents the length of the housing 20, the Y direction represents the width of the housing 20, and the Z direction represents the height of the housing 20. Since the housing 20 defines the shape of the battery device 200, the length direction X is also the length of the battery device 200, the width direction Y is also the width of the battery device 200, and the height direction Z is also the height of the battery device 200.

[0094] In some embodiments, please refer to Figure 2 The battery device 200 includes a battery cell assembly 300, wherein a plurality of battery cells 30 of the battery cell assembly 300 can be arranged along the length direction X of the housing 20. As an example, the plurality of battery cells 30 of the battery cell assembly 300 can be arranged along the width direction Y of the housing 20. As an example, the arrangement direction of the plurality of battery cells 30 of the battery cell assembly 300 can also be inclined to the length direction X of the housing 20.

[0095] In some embodiments, please refer to Figure 2 The battery cell assembly 300 comprises multiple battery cells 30 arranged along a first direction M. The first direction M can be aligned with the length direction X of the housing 20. Alternatively, the first direction M can be aligned with the width direction Y of the housing 20. The first direction M can also be tilted relative to the length direction X of the housing 20.

[0096] In some embodiments, the battery cell 30 has a height, a length, and a width, wherein the length of the battery cell 30 is greater than or equal to the width of the battery cell 30. The direction of the length of the battery cell 30 may be perpendicular to the first direction M to facilitate the grouping of multiple battery cells 30. Of course, in some embodiments, the direction of the length of the battery cell 30 may also be parallel to the first direction M.

[0097] In some embodiments, please refer to Figure 2 When the battery device 200 includes a plurality of battery cell assemblies 300, the plurality of battery cell assemblies 300 are arranged along a second direction N, which is perpendicular to the first direction M, so that the plurality of battery cell assemblies 300 are disposed within the housing space 201 of the battery device 200.

[0098] Please see Figure 2Multiple battery cells 30 are arranged to form a battery cell assembly 300, and the top surfaces of the multiple battery cells 30 also constitute the top surface of the battery cell assembly 300. The two ends of the top surface of the battery cell assembly 300 along the second direction N constitute the shoulders 301 of the battery cell assembly 300. Since the battery cell assembly 300 is formed by multiple battery cells 30 arranged along the first direction M, the two ends of the top surface of each battery cell 30 along the second direction N are part of the shoulders 301 of the battery cell assembly 300, that is, the two ends of the top surface of the battery cell 30 along the second direction N are the sub-shoulders 34 of the battery cell 30, and the multiple sub-shoulders 34 at the same end of the battery cell assembly 300 along the second direction N together constitute the shoulders 301 of the battery cell assembly 300.

[0099] In some embodiments, please refer to Figures 3 to 5 The battery cell 30 generally includes a housing 32 and an electrode assembly 31. The electrode assembly 31 is disposed in the housing 32 so that the housing 32 can support and protect the electrode assembly 31.

[0100] The electrode assembly 31 includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the battery cell 30, 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, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0101] In some embodiments, the electrode assembly 31 is provided with tabs that can conduct current from the electrode assembly 31. The tabs include a positive tab and a negative tab.

[0102] The outer casing 32 can be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite casing 32), or aluminum-plastic film, etc. In some embodiments, the outer casing 32 can be a sealed structure or a non-sealed structure. As an example, when the outer casing 32 is a non-sealed structure, the outer casing 32 serves to protect the electrode assembly 31, and a sealing bag is also included between the outer casing 32 and the electrode assembly 31. The sealing bag is used to encapsulate the electrode assembly 31 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing 32 is a sealed structure, it is used to encapsulate the electrode assembly 31 and electrolyte components.

[0103] In some embodiments, the housing 32 includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided one or more.

[0104] In some embodiments, at least one electrode terminal 33 is provided on the housing 32, and the electrode terminal 33 is electrically connected to the tab. The electrode terminal 33 can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal 33 can be provided on the end cap or on the housing. The electrode terminal 33 refers to a conductive element provided on the battery cell 30, used to connect to an external circuit so that the battery cell 30 can output electrical energy or charge the battery cell 30. The battery cell 30 generally has two electrode terminals 33, which are a positive terminal and a negative terminal, respectively. The positive terminal is connected to the positive tab of the electrode assembly 31, and the negative terminal is connected to the negative tab.

[0105] In some embodiments, electrode terminals 33 are disposed on the top surface of the battery cell 30 to facilitate the arrangement of multiple battery cells 30 to form a battery cell assembly 300, and also to facilitate the series, parallel or mixed connection of multiple battery cells 30.

[0106] In some embodiments, when the electrode terminal 33 is provided on the top surface of the battery cell 30, the sub-shoulder portion 34 of the battery cell 30 is located on the side of the electrode terminal 33 along the second direction N, that is, the portion of the top surface of the battery cell 30 along the second direction N on both sides of the two electrode terminals 33 forms the two sub-shoulder portions 34 of the battery cell 30.

[0107] In some embodiments, please refer to Figures 3 to 5 Because gas is often generated inside the battery cell 30 during charging and discharging, a gas-absorbing material is often placed in the casing 32 to absorb the gas generated during charging and discharging, in order to improve the safety of the battery cell 30. The gas-absorbing material is usually a substance with high specific surface area and strong adsorption capacity, such as metal oxides or molecular sieves. Since the gas-absorbing material occupies space inside the casing 32, a protruding structure 341 is generally provided on the top of the casing 32 to reduce the space occupied by the gas-absorbing material for the installation of the electrode assembly 31 within the casing 32. This creates an additional volume at the top of the casing 32 to accommodate the gas-absorbing material. The protruding structure 341 is generally provided on the sub-shoulder 34 of the battery cell 30, and to accommodate more gas-absorbing material, a protruding structure 341 is often provided on each sub-shoulder 34 of the battery cell 30. Additionally, in some embodiments, a protruding structure 341 is often provided on the top of the casing 32 to accommodate the bent portion of the electrode assembly 31's tabs. The protrusion structure 341 can be hemispherical, cylindrical, or other shapes. In order to increase the volume of the space formed by the protrusion structure 341, the shape of the protrusion structure 341 is generally adapted to the shape of the sub-shoulder 34 of the battery cell 30. For example, when the sub-shoulder 34 is rectangular, the protrusion structure 341 also adopts a rectangular cross-section column; or, when the sub-shoulder 34 is arc-shaped, the protrusion structure 341 adopts a matching arc-shaped cross-section column, etc.

[0108] Please see Figures 2 to 17 According to some embodiments of this application, this application provides a battery device 200, including a housing 20, a plurality of battery cell assemblies 300, and a pressure strip 40; the housing 20 has a receiving space 201; each battery cell assembly 300 includes a plurality of battery cells 30 arranged along a first direction M, the plurality of battery cell assemblies 300 are arranged in the receiving space 201 along a second direction N, and the top surface of the battery cell assembly 300 has shoulders 301 at both ends along the second direction N; the pressure strip 40 connects two adjacent shoulders 301; along the second direction N, any two adjacent shoulders 301 are connected by a pressure strip. The strips 40 are connected; each battery cell 30 has a protruding structure 341 at a position corresponding to the shoulder 301, and the protruding structure 341 is fixedly connected to the corresponding pressure strip 40; the pressure strip 40 includes a first pressure strip 41, which includes a middle part 411 and connecting parts 412 that are respectively connected to the two sides of the middle part 411 along the second direction N; along the second direction N, the middle part 411 is located in the area between the two corresponding protruding structures 341, and the connecting parts 412 are fixedly connected to the corresponding protruding structures 341; at least a portion of the middle part 411 protrudes from the side of the connecting parts 412 toward the battery cell 30.

[0109] The housing 20 refers to the shell structure that forms the periphery of the battery device 200. The housing 20 is used to support and protect the internal components of the battery device 200 and to define the external shape of the battery device 200. The specific structure of the housing 20 can be as described in the above embodiments, and will not be repeated here.

[0110] Multiple refers to two or more items.

[0111] Multiple battery cell modules 300 refers to a number of two or more battery cell modules 300.

[0112] The pressure strip 40 refers to a strip-shaped connector that connects two adjacent battery cell modules 300 to enhance structural stability. The pressure strip 40 can be made of plastic, polyurethane-based materials, metal, or composite materials. Using polyurethane-based materials for the pressure strip 40 allows for direct extrusion molding, making it easy to process and manufacture at a low cost.

[0113] The accommodating space 201 refers to the internal space of the housing 20, which is used to accommodate the battery cell assembly 300 and the pressure strip 40 and other structures.

[0114] Each battery cell assembly 300 includes a plurality of battery cells 30 arranged along a first direction M, meaning that each battery cell assembly 300 includes a plurality of battery cells 30, and the plurality of battery cells 30 in each battery cell assembly 300 are arranged along the first direction M. The first direction M is perpendicular to the height direction Z.

[0115] The arrangement of multiple battery cell modules 300 along the second direction N in the receiving space 201 means that each battery cell module 300 is installed in the receiving space 201, and these battery cell modules 300 are arranged along the second direction N in the receiving space 201.

[0116] The second direction N refers to the direction perpendicular to the first direction M, and the second direction N is perpendicular to the height direction Z.

[0117] The top surface of the battery cell module 300 refers to the top surface of the battery cell module 300 along the height direction Z.

[0118] Shoulder 301 refers to the two ends of the top surface of the battery cell assembly 300 along the second direction N. Since the battery cell assembly 300 includes multiple battery cells 30 arranged along the first direction M, the two ends of the top surface of the battery cell 30 along the second direction N respectively form a part of the corresponding shoulder 301 of the battery cell assembly 300. Accordingly, the two ends of the top surface of the battery cell 30 along the second direction N are respectively called sub-shoulder 34. In the battery cell assembly 300, the multiple sub-shoulder 34 of the multiple battery cells 30 along the same side of the second direction N together constitute the shoulder 301 of the corresponding side of the battery cell assembly 300 along the second direction N. That is to say, the shoulder 301 of the battery cell assembly 300 along the second direction N includes the sub-shoulder 34 of the multiple battery cells 30 along the same side of the second direction N.

[0119] The pressure strip 40 connecting two adjacent shoulders 301 means that the pressure strip 40 is connected to the shoulders 301 of two adjacent battery cell assemblies 300. As an example, the pressure strip 40 can be bonded to the corresponding two shoulders 301 on both sides along the second direction N using adhesive. The adhesive can be structural adhesive, curing adhesive, etc. As an example, the pressure strip 40 can be bonded to the corresponding two shoulders 301 on both sides along the second direction N using double-sided adhesive. As an example, if the portion corresponding to the sub-shoulder 34 of the battery cell 30 is plastic, the pressure strip 40 can also be welded to the shoulder 301 of the battery cell assembly 300.

[0120] Since the shoulder 301 of the battery cell assembly 300 includes the sub-shoulder 34 of a plurality of battery cells 30 in the battery cell assembly 300, the pressure strip 40 is connected to the shoulder 301 of two adjacent battery cell assemblies 300. Accordingly, the pressure strip 40 is connected to the corresponding sub-shoulder 34 of each battery cell 30 in one battery cell assembly 300 along one side of the second direction N, and the pressure strip 40 is connected to the corresponding sub-shoulder 34 of each battery cell 30 in another battery cell assembly 300 along the other side of the second direction N. That is, the sub-shoulder 34 of two adjacent battery cells 30 in the two battery cell assemblies 300 along the second direction N are connected to both sides of the pressure strip 40 along the second direction N.

[0121] Along the second direction N, any two adjacent shoulders 301 are connected by pressure strips 40, which means that any two adjacent shoulders 301 of any two adjacent battery cell assemblies 300 are connected by pressure strips 40.

[0122] The protruding structure 341 refers to the structure that protrudes from the shoulder 34 of the battery cell 30. The specific structure of the protruding structure 341 can be as described in the above embodiments, and will not be repeated here.

[0123] The position of the battery cell 30 corresponding to the shoulder 301 refers to the area where the battery cell 30 forms the corresponding shoulder 301, and is also the sub-shoulder 34 of the part of the battery cell 30 that forms the corresponding shoulder 301. That is, the shoulder 301 and the sub-shoulder 34 are located on the same side of the battery cell 30 along the second direction N.

[0124] The fixed connection between the protruding structure 341 and the corresponding pressure strip 40 means that the pressure strip 40 connects to the shoulder 301 of the corresponding battery cell assembly 300. The shoulder 301 of the battery cell assembly 300 includes sub-shoulders 34 corresponding to multiple battery cells 30. Accordingly, the pressure strip 40 connects to the sub-shoulders 34 of the multiple battery cells 30, and the protruding structure 341 is provided on the sub-shoulders 34. Therefore, the pressure strip 40 is fixedly connected to the protruding structure 341 on the sub-shoulders 34. The protruding structure 341 and the corresponding pressure strip 40 can be bonded together using adhesive. The adhesive can be structural adhesive, curing adhesive, etc. As an example, the protruding structure 341 and the corresponding pressure strip 40 can be bonded together using double-sided adhesive. As an example, if the protruding structure 341 is made of plastic, the protruding structure 341 and the corresponding pressure strip 40 can also be welded together.

[0125] The first pressure strip 41 refers to the pressure strip 40 with a middle part 411.

[0126] The middle section 411 refers to the segment in the first pressure strip 41 located in the middle along the second direction N. The middle section 411 can be made of a material with good vibration resistance, or it can be a component with a structural shape that has higher structural strength, or it can be a component with a shape that has even higher vibration resistance. For example, its structural strength can be increased by increasing the thickness of the middle section 411, thereby improving its vibration resistance. For example, its adaptability to vibration can be increased by bending the middle section 411 along the vibration direction, or by corrugating the middle section 411 along the vibration direction, so that the middle section 411 can more easily deform with vibration in the direction of vibration transmission, thereby improving its vibration resistance.

[0127] The connecting part 412 refers to the portion of the first pressure strip 41 that is connected to one side of the middle part 411 along the second direction N. The first pressure strip 41 has two connecting parts 412, which are located on both sides of the middle part 411 along the second direction N, and are connected to both sides of the middle part 411 along the second direction N.

[0128] Along the second direction N, the area where the middle portion 411 is located between the two corresponding protruding structures 341 refers to the position corresponding to the area between the two protruding structures 341 along the second direction N when the first pressure strip 41 and the protruding structures 341 on the two adjacent shoulder portions 301 are located.

[0129] The connection 412 is fixedly connected to the corresponding protrusion 341. This means that when the first pressure strip 41 is connected to the protrusion 341 of two adjacent battery cell assemblies 300, the two connection parts 412 on both sides of the first pressure strip 41 along the second direction N are fixedly connected to the two adjacent protrusions 341 along the second direction N.

[0130] At least part of the intermediate portion 411 refers to a section of the intermediate portion 411 along the second direction N, several sections along the second direction N, or the entire intermediate portion 411.

[0131] The fact that at least a portion of the middle portion 411 protrudes toward the side of the battery cell 30 relative to the connecting portion 412 means that at least a portion of the middle portion 411 of the first pressure strip 41 protrudes toward the side of the battery cell 30 relative to the connecting portion 412. This not only improves the vibration resistance of the middle portion 411, but also makes good use of the space between the protruding structures 341 of the two battery cells 30, thereby improving the space utilization of the battery device 200.

[0132] In the technical solution of this application embodiment, the protruding structures 341 of two adjacent battery cell assemblies 300 are connected by a pressure strip 40 to secure each battery cell 30. The pressure strip 40 uses a first pressure strip 41, which is provided with two connecting portions 412 to connect the protruding structures 341 of the two battery cell assemblies 300 respectively, so as to facilitate the connection between the first pressure strip 41 and the shoulder 301 of the corresponding battery cell assembly 300. A middle portion 411 is provided between the two connecting portions 412 of the first pressure strip 41, and at least a portion of the middle portion 411 protrudes towards one side of the battery cell 30. This not only makes good use of the space between the protruding structures 341 of the two battery cells 30 to improve the space utilization rate of the battery device 200, but also improves the vibration resistance of the first pressure strip 41 along the second direction N, thereby reducing the risk of connection failure between the first pressure strip 41 and the battery cell 30.

[0133] In some embodiments, please refer to Figures 2 to 11 The middle part 411 can also extend from the connecting part 412 toward the side opposite to the top surface of the battery cell 30.

[0134] In some embodiments, please refer to Figures 2 to 11 Along the second direction N, and within the same battery cell 30, the top surface of the battery cell 30 forms a sub-region 342 on the side of each protrusion 341 facing away from the other protrusion 341; multiple sub-regions 342 on the same side along the second direction N in the battery cell assembly 300 constitute a sub-region 302; the middle portion 411 has a connecting surface 4110 on the side facing the battery cell 30, and the connecting surface 4110 is bonded and fixed to the corresponding two sub-regions 302.

[0135] Since sub-shoulders 34 are formed at both ends of the top surface of the battery cell 30 along the second direction N, and protrusions 341 are provided on the sub-shoulders 34, the battery cell 30 is provided with protrusions 341 at both ends along the second direction N. The formation of a sub-region 342 on the top surface of the battery cell 30 along the second direction N, on the side of each protrusion 341 facing away from the other protrusion 341, means that in the same battery cell 30, the battery cell 30 forms a sub-region 342 on the relatively outer side of the two protrusions 341 along the second direction N. It also means that a sub-region 342 is formed on the sub-shoulders 34 of the battery cell 30 on the side of the corresponding protrusion 341 facing away from the other protrusion 341.

[0136] The term "multiple sub-regions 342 along the same side of the second direction N in the battery cell assembly 300" means that the sub-region 302 of the battery cell assembly 300 includes the sub-regions 342 of multiple battery cells 30 along the same side of the second direction N in the battery cell assembly 300. It also means that the sub-regions 342 of multiple battery cells 30 along the same side of the second direction N in the battery cell assembly 300 together form a sub-region 302 of the battery cell assembly 300.

[0137] The connecting surface 4110 refers to the surface of the middle portion 411 facing the top surface of the battery cell 30 along the thickness direction of the first pressure strip 41. The thickness direction of the first pressure strip 41 is also the thickness direction of the connecting portion 412. The thickness direction of the first pressure strip 41 is parallel to the height direction Z.

[0138] Since the first pressure strip 41 is connected to the shoulder 301 of two adjacent battery cell assemblies 300, and the two connecting portions 412 of the first pressure strip 41 are respectively connected to two adjacent protrusions 341 along the second direction N, and the middle portion 411 of the first pressure strip 41 is located between the two adjacent protrusions 341 along the second direction N, the connecting surface 4110 of the middle portion 411 is located at the position corresponding to the two adjacent sub-regions 302 of the two adjacent battery cell assemblies 300.

[0139] The connecting surface 4110 is bonded and fixed to the corresponding two sub-regions 302 to fix the middle part 411 to the two adjacent battery cell assemblies 300. As an example, the connecting surface 4110 and the corresponding two sub-regions 302 can be bonded and fixed using adhesive. The adhesive can be structural adhesive, curing adhesive, etc. As an example, the connecting surface 4110 and the corresponding two sub-regions 302 can be bonded and fixed using double-sided adhesive. As an example, if the material of the corresponding part of the sub-region 342 of the battery cell 30 is plastic, and correspondingly, the part of the corresponding part of the sub-region 342 of the battery cell assembly 300 is also plastic, then the connecting surface 4110 and the corresponding two sub-regions 302 can also be welded together.

[0140] By using the above technical solution, the connecting surface 4110 of the middle part 411 is bonded and fixed to the corresponding two sub-regions 302, which not only can the middle part 411 be fixedly connected, but also can improve the stability of the battery cell 30 connection, thereby improving the structural strength of the battery device 200.

[0141] In some embodiments, please refer to Figures 2 to 9 , Figures 13 to 17 The connecting surface 4110 is adapted to the corresponding two sub-regions 302.

[0142] The two corresponding sub-regions 302 refer to the two sub-regions 302 that need to be bonded on the connecting surface 4110.

[0143] The matching of the connecting surface 4110 with the corresponding two sub-regions 302 means that the shape of the connecting surface 4110 matches the shape of the area formed by the combination of the two sub-regions 302 that the connecting surface 4110 needs to connect, and the size of the connecting surface 4110 matches the size of the area formed by the combination of the two sub-regions 302. For example, the size of the connecting surface 4110 along the second direction N is similar to or equal to the size of the combination of the two sub-regions 302 along the second direction N; for example, the size of the connecting surface 4110 along the first direction M is similar to or equal to the size of the sub-regions 302 along the first direction M; this increases the area of ​​the connecting surface 4110 with the corresponding two sub-regions 302, thereby increasing the connection strength between the connecting surface 4110 and the corresponding sub-regions 302. Similar sizes mean that the difference between the two sizes is within 10%, or the difference between the two sizes is within 20mm.

[0144] Through the above technical solution, the connecting surface 4110 and the sub-region 302 can be better bonded and fixed, the bonding area and connection strength between the middle part 411 and the sub-region 302 can be increased, thereby improving the structural strength of the battery device 200.

[0145] In some embodiments, a portion of the connecting surface 4110 may also be bonded to the sub-region 302.

[0146] In some embodiments, the dimension of the connecting surface 4110 along the second direction N can also be set smaller than the dimension of the corresponding two sub-regions 302 along the second direction N, so that the connecting surface 4110 can be bonded to a portion of each sub-region 302 in the corresponding two sub-regions 302.

[0147] In some embodiments, please refer to Figure 2 , Figure 3 , Figures 7 to 9 , Figures 14 to 16 The middle part 411 includes a first part 4111, the thickness of which is greater than the thickness of the connecting part 412.

[0148] The first part 4111 refers to the middle part 411 of a shape.

[0149] The thickness of the first part 4111 refers to the dimension in the thickness direction of the first part 4111.

[0150] The thickness of the connecting part 412 refers to the dimension of the connecting part 412 in the thickness direction.

[0151] By using the above technical solution, setting the thickness of the first part 4111 to be greater than the thickness of the connecting part 412 can give the first part 4111 greater structural strength, so that the first part 4111 can resist vibration well; in addition, when the middle part 411 is bonded and fixed to the battery cell 30, the battery cell 30 can be connected and fixed more stably, thereby improving the structural strength of the battery device 200.

[0152] In some embodiments, please refer to Figure 2 , Figure 3 , Figures 7 to 9 , Figures 14 to 16 The first part, 4111, is flat and strip-shaped.

[0153] Flat strip refers to a shape that is strip-shaped as a whole and has a flat cross-section.

[0154] With the above technical solution, the middle part 411 uses a flat strip-shaped first part 4111, which has a simple structure.

[0155] In some embodiments, the top surface of the first part 4111 is flush with the top surface of the connecting part 412.

[0156] The top surface of the first part 4111 being flush with the top surface of the connecting part 412 means that the top surfaces of the first part 4111 and the connecting part 412 are in the same plane.

[0157] Through the above technical solution, setting the top surface of the first part 4111 to be flush with the top surface of the connecting part 412 can enable the first part 4111 to make full use of the space between the protruding structures 341 of the two battery cells 30, so as to improve the space utilization rate of the battery device 200.

[0158] In some embodiments, referring to Figures 3 to 6 、 Figure 15 and Figure 17 , the middle part 411 includes a second part 4112. The second part 4112 includes a first segment 41121 and second segments 41122 extending from both sides of the first segment 41121 along the second direction N towards the direction away from the battery cell 30. The second segments 41122 on both sides of the first segment 41121 are respectively connected to the two connecting parts 412, and a connecting surface 4110 is provided on the first segment 41121.

[0159] The second part 4112 refers to a middle part 411 of a certain shape. The first segment 41121 refers to a partial section in the middle of the second part 4112 along the second direction N. The second segments 41122 refer to partial sections on both sides of the second part 4112 along the second direction N.

[0160] The second part 4112 including second segments 41122 extending from both sides of the first segment 41121 along the second direction N towards the direction away from the battery cell 30 means that the second part 4112 includes two second segments 41122. The two second segments 41122 are respectively located on both sides of the first segment 41121 along the second direction N, and each second segment 41122 extends from the corresponding side of the first segment 41121 towards the direction away from the battery cell 30, so that the second part 4112 as a whole forms a groove-like structure with the middle part concave towards the battery cell 30.

[0161] The second segments 41122 on both sides of the first segment 41121 being respectively connected to the two connecting parts 412 means that the two second segments 41122 are respectively connected to the two connecting parts 412, so that the corresponding side of each second segment 41122 connecting the first segment 41121 is connected to the corresponding connecting part 412, so that the first pressing strip 41 is integrally arranged in a "U" shape.

[0162] The connecting surface 4110 being provided on the first segment 41121 means that a connecting surface 4110 is provided on the side of the first segment 41121 facing the battery cell 30, so as to facilitate connecting the first segment 41121 to the corresponding two sub-regions 302.

[0163] Through the above technical solution, the middle part 411 uses the second part 4112, and the first segment 41121 in the middle of the second part 4112 is recessed in the direction of the division area. This not only simplifies the structure, but also allows it to deform well with the vibration of the second direction N, thereby improving the vibration resistance. In addition, when the middle part 411 is bonded and fixed to the battery cell 30, the second part 4112 can have a larger bonding area with the battery cell 30, thereby more stably connecting and fixing the battery cell 30 and improving the structural strength of the battery device 200.

[0164] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 7 , Figure 10 , Figure 11 , Figures 13 to 15 The middle part 411 includes a third part 4113, which is curved in an arc shape, and the two sides of the third part 4113 are respectively connected to two connecting parts 412.

[0165] The third part 4113 refers to the curved middle part 411. The curved shape of the third part 4113 means that the cross section of the third part 4113 along the second direction N is curved.

[0166] The third part 4113 is connected to two connecting parts 412 on both sides, which means that the arc-shaped third part 4113 is connected to two connecting parts 412 on both sides.

[0167] Through the above technical solution, the middle part 411 uses an arc-shaped third part 4113, which not only has a simple structure, but can also deform well with the vibration of the second direction N, so as to improve the vibration resistance performance.

[0168] In some embodiments, please refer to Figure 7 , Figures 12 to 17 The pressure strip 40 includes a second pressure strip 42, which is in the shape of a flat strip.

[0169] The second pressure strip 42 refers to the pressure strip 40, which is integrally set in a flat strip shape. Flat strip shape means that it is integrally strip-shaped and has a flat cross-section.

[0170] Through the above technical solution, the pressure strip 40 uses a second pressure strip 42 in the shape of a flat strip, which has a simple structure, low cost, and is easy to process and manufacture.

[0171] In some embodiments, please refer to Figure 2 , Figure 3 , Figures 13 to 17When there are three or more battery cell assemblies 300, two adjacent battery cell assemblies 300 located at one end of the second direction N are connected by a second pressure strip 42, and the second pressure strip 42 connects the protrusion structure 341 of the corresponding two battery cell assemblies 300, and the remaining pressure strips 40 are the first pressure strips 41.

[0172] "Three or more battery cell modules 300" means that the number of battery cell modules 300 can be three, four, five, six, etc.

[0173] Since two adjacent battery cell modules 300 are connected by a pressure strip 40, the number of pressure strips 40 will be one less than the number of battery cell modules 300.

[0174] If there are three or more battery cell modules of 300, then the number of pressure strips 40 is two or more.

[0175] Two adjacent battery cell assemblies 300 located at one end along the second direction N mean that these two battery cell assemblies 300 are adjacent along the second direction N, and among a plurality of battery cell assemblies 300, these two battery cell assemblies 300 are located at the same end along the second direction N.

[0176] The connection between two adjacent battery cell assemblies 300 located at one end of the second direction N via a second pressure strip 42 means that the pressure strip 40 connecting the two adjacent battery cell assemblies 300 located at one end of the second direction N is the second pressure strip 42.

[0177] The remaining pressure strips 40 are the first pressure strips 41, which means that among the multiple pressure strips 40 used in the battery device 200, all pressure strips 40 except the second pressure strip 42 are the first pressure strips 41. That is, in this embodiment, the pressure strip 40 at one end along the second direction N is the second pressure strip 42, while the other pressure strips 40 are the first pressure strips 41.

[0178] In the case where there are two pressure strips 40 along the second direction N, one pressure strip 40 uses the first pressure strip 41 and the other pressure strip 40 uses the second pressure strip 42. This not only reduces the risk of failure in the connection between the pressure strip 40 and the battery cell 30, but also simplifies the structure and reduces costs.

[0179] When there are three or more pressure strips 40 along the second direction N, one pressure strip 40 at one end of the second direction N uses a second pressure strip 42, and the other pressure strips 40 use a first pressure strip 41, so as to reduce the risk of failure of the connection between the pressure strip 40 and the battery cell 30, and also to simplify the structure and reduce costs.

[0180] When there are four or more pressure strips 40 along the second direction N, the pressure strips 40 at one end along the second direction N use the second pressure strip 42, and the other pressure strips 40 can all use the first pressure strip 41, or partially use the first pressure strip 41 and some use the second pressure strip 42, so as to reduce the risk of connection failure between the pressure strip 40 and the battery cell 30 to a certain extent, and also simplify the structure and reduce costs.

[0181] Through the above technical solution, since the battery cell assembly 300 at the end along the second direction N is closer to the beam 202 of the housing 20, it can be supported more stably, reducing the vibration of the battery cell assembly 300. Correspondingly, the battery cell assembly 300 is connected to the adjacent battery cell assembly 300 using the second pressure strip 42, which simplifies the structure. The remaining pressure strips 40 use the first pressure strip 41, and the combination of the first pressure strip 41 and the second pressure strip 42 can reduce the risk of connection failure between the battery cell assembly 300 and the pressure strip 40, thereby reducing costs.

[0182] In some embodiments, please refer to Figure 2 , Figure 3 , Figures 13 to 17 When there are four or more battery cell assemblies 300, two adjacent battery cell assemblies 300 at each end along the second direction N are connected by a second pressure strip 42, and the second pressure strip 42 connects the protrusion structure 341 of the corresponding two battery cell assemblies 300, and the remaining pressure strips 40 are the first pressure strips 41.

[0183] "Four or more battery cell modules 300" means that the number of battery cell modules 300 can be four, five, six, seven, eight, etc. The number of pressure strips 40 will be one less than the number of battery cell modules 300.

[0184] If there are four or more battery cell modules of 300, then the number of pressure strips of 40 is three or more.

[0185] The connection between two adjacent battery cell assemblies 300 at each end along the second direction N via a second pressure strip 42 means that the pressure strip 40 connecting two adjacent battery cell assemblies 300 at each end along the second direction N is the second pressure strip 42.

[0186] The remaining pressure strips 40 are the first pressure strips 41, which means that among the multiple pressure strips 40 used in the battery device 200, all pressure strips 40 except for the second pressure strip 42 are the first pressure strips 41. That is, in this embodiment, the pressure strips 40 at both ends along the second direction N are the second pressure strips 42, while the other pressure strips 40 are the first pressure strips 41.

[0187] When there are three or more pressure strips 40 along the second direction N, the two pressure strips 40 at both ends of the second direction N use the second pressure strip 42 respectively, and the other pressure strips 40 use the first pressure strip 41, so as to reduce the risk of failure of the connection between the pressure strip 40 and the battery cell 30, and also to simplify the structure and reduce the cost.

[0188] When there are four or more pressure strips 40 along the second direction N, the pressure strips 40 at one end along the second direction N use the second pressure strip 42, and the other pressure strips 40 can all use the first pressure strip 41, or partially use the first pressure strip 41 and some use the second pressure strip 42, so as to reduce the risk of connection failure between the pressure strip 40 and the battery cell 30 to a certain extent, and also simplify the structure and reduce costs.

[0189] By using the above technical solution, the pressure strips 40 at both ends of the second direction N are replaced with second pressure strips 42 to simplify the structure and can cooperate with the beams 202 at both ends of the housing 20 along the second direction N to stably support the battery cell assembly 300 at both ends of the second direction N. The remaining pressure strips 40 are replaced with first pressure strips 41, which reduces the risk of connection failure between the battery cell assembly 300 and the pressure strips 40 and reduces costs.

[0190] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 13 , Figure 14 , Figure 16 and Figure 17 The two pressure strips 40 located at both ends of the second direction N are the second pressure strips 42, and the remaining pressure strips 40 are the first pressure strips 41.

[0191] Since the battery cell assembly 300 is arranged along the second direction N, and the pressure strip 40 connects two adjacent battery cell assemblies 300, the multiple pressure strips 40 are also arranged at intervals along the second direction N.

[0192] The two pressure strips 40 located at both ends of the second direction N are called the second pressure strips 42, and the remaining pressure strips 40 are called the first pressure strips 41. This means that among the multiple pressure strips 40, the two pressure strips 40 located at both ends of the second direction N are the second pressure strips 42, while the other pressure strips 40 all use the first pressure strips 41.

[0193] When there are three or more pressure strips 40 along the second direction N, the two pressure strips 40 at both ends of the second direction N use the second pressure strip 42 respectively, and the other pressure strips 40 use the first pressure strip 41, so as to reduce the risk of failure of the connection between the pressure strip 40 and the battery cell 30, and also to simplify the structure and reduce the cost.

[0194] When there are four or more pressure strips 40 along the second direction N, the pressure strip 40 at one end along the second direction N uses the second pressure strip 42, while the other pressure strips 40 can all use the first pressure strip 41. This reduces the risk of connection failure between the pressure strip 40 and the battery cell 30, and simplifies the structure and reduces costs.

[0195] By using the above technical solution, the pressure strips 40 at both ends of the second direction N are made of the second pressure strip 42 to simplify the structure and reduce the cost, while the remaining pressure strips 40 are made of the first pressure strip 41, which can reduce the risk of connection failure between the battery cell assembly 300 and the first pressure strip 41.

[0196] In some embodiments, please refer to Figure 2 , Figure 3 , Figures 13 to 17 When the pressure strip 40 includes multiple first pressure strips 41, the structure of the middle portion 411 of each first pressure strip 41 can be set to be the same. For example, the middle portion 411 of each first pressure strip 41 may be a first portion 4111. For example, the middle portion 411 of each first pressure strip 41 may be a second portion 4112. For example, the middle portion 411 of each first pressure strip 41 may be a third portion 4113.

[0197] In some embodiments, please refer to Figure 2 , Figure 3 , Figures 13 to 17 When the pressure strip 40 includes multiple first pressure strips 41, the structures of the middle portions 411 of the multiple first pressure strips 41 can be set differently. For example, some of the middle portions 411 of the first pressure strips 41 may be a first portion 4111, some may be a second portion 4112, and some may be a third portion 4113. For example, some of the middle portions 411 of the first pressure strips 41 may be a first portion 4111, and the remaining middle portions 411 of the first pressure strips 41 may be a second portion 4112. For example, some of the middle portions 411 of the first pressure strips 41 may be a first portion 4111, and the remaining middle portions 411 of the first pressure strips 41 may be a third portion 4113. For example, some of the middle portions 411 of the first pressure strips 41 may be a second portion 4112, and the remaining middle portions 411 of the first pressure strips 41 may be a third portion 4113.

[0198] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 16Along the second direction N, any two adjacent battery cell assemblies 300 are connected by pressure strips 40, and the two pressure strips 40 at both ends of the second direction N are the second pressure strips 42, and the remaining pressure strips 40 are the first pressure strips 41. The middle part 411 of the first pressure strip 41 includes a first part 4111. The thickness of the first part 4111 is greater than the thickness of the connecting part 412, and the top surface of the first part 4111 is flush with the top surface of the connecting part 412.

[0199] Through the above technical solution, the pressure strips 40 at both ends of the second direction N are made of second pressure strips 42 to simplify the structure and reduce costs, while the remaining pressure strips 40 are made of first pressure strips 41, resulting in a simple structure. The thickness of the first part 4111 is set to be greater than the thickness of the connecting part 412, which can give the first part 4111 greater structural strength and make the first part 4111 better resistant to vibration. The top surface of the first part 4111 is made to be flush with the top surface of the connecting part 412, which can make full use of the space between the protruding structures 341 of the two battery cells 30, thereby improving the space utilization of the battery device 200. In addition, when the middle part 411 is bonded and fixed to the battery cell 30, the battery cell 30 can be connected and fixed more stably, thereby improving the structural strength of the battery device 200.

[0200] In some embodiments, please refer to Figure 3 and Figure 4 Each battery cell 30 has two electrode terminals 33 spaced apart on its top surface along the second direction N, and a protruding structure 341 is provided on the side of each electrode terminal 33 facing away from the other electrode terminal 33 on the top surface of the battery cell 30.

[0201] The top surface of each battery cell 30 is provided with two electrode terminals 33 at intervals along the second direction N. This means that each battery cell 30 has two electrode terminals 33 on its top surface along the height direction Z, and these two electrode terminals 33 are spaced apart along the second direction N. These two electrode terminals 33 can be the positive terminal and the negative terminal, respectively.

[0202] The battery cell 30 has a raised structure 341 on the top surface of each electrode terminal 33 on the side opposite to the other electrode terminal 33. This means that there are two raised structures 341 on the top surface of the battery cell 30, and in the second direction N, the two electrode terminals 33 are located between the two raised structures 341.

[0203] The above technical solution facilitates the positioning of the protruding structure 341, which in turn facilitates the processing and manufacturing of the battery cell 30.

[0204] Please see Figure 2 , Figure 3 and Figure 16According to some embodiments of this application, this application provides a battery device 200, including a housing 20, a plurality of battery cell assemblies 300, and a retaining strip 40; the housing 20 has a receiving space 201; each battery cell assembly 300 includes a plurality of battery cells 30 arranged along a first direction M, and the plurality of battery cell assemblies 300 are arranged in the receiving space 201 along a second direction N; the top surface of each battery cell assembly 300 has shoulders 301 at both ends along the second direction N; each battery cell 30 has a protruding structure 341 at a position corresponding to the shoulder 301, and the top surface of each battery cell 30 forms a sub-region 342 on the side of each protruding structure 341 facing away from the other protruding structure 341; the plurality of sub-regions 342 on the same side along the second direction N in the battery cell assembly 300 constitute a sub-region 302; along the second direction N, any two adjacent shoulders 301 are connected by retaining strips 40. The retaining strip 40 includes a first retaining strip 41 and a second retaining strip 42. When there are four or more battery cell assemblies 300, adjacent two battery cell assemblies 300 at each end along the second direction N are connected by a second pressure strip 42, and the remaining pressure strips 40 are first pressure strips 41. The second pressure strip 42 connects the protruding structures 341 of the corresponding two battery cell assemblies 300. The first pressure strip 41 includes a middle portion 411 for vibration resistance and connecting portions 412 that are respectively connected to both sides of the middle portion 411 along the second direction N; along the second direction N, the middle portion 411 is located in the area between the corresponding two protruding structures 341, and the connecting portions 412 are fixedly connected to the corresponding protruding structures 341. The middle portion 411 protrudes from the corresponding connecting portion 412 toward the side facing the battery cell 30, and the middle portion 411 has a connecting surface 4110 on the side facing the battery cell 30. The connecting surface 4110 is adapted to the corresponding two sub-regions 302, and the connecting surface 4110 is bonded and fixed to the corresponding two sub-regions 302. The middle part 411 includes a first part 4111, which is a flat strip. The top surface of the first part 4111 is flush with the top surface of the connecting part 412, and the thickness of the first part 4111 is greater than the thickness of the connecting part 412. The second pressure strip 42 is a flat strip.

[0205] The middle section 411 uses a flat strip-shaped first section 4111, which has a simple structure. Setting the thickness of the first section 4111 to be greater than the thickness of the connecting section 412 gives the first section 4111 greater structural strength, allowing it to effectively resist vibration. Setting the top surface of the first section 4111 to be flush with the top surface of the connecting section 412 allows the first section 4111 to fully utilize the space between the protruding structures 341 of the two battery cells 30. The connecting surface 4110 of the first section 4111 is adapted and connected to the corresponding two sub-regions 302, resulting in a more stable connection. The fixed battery cell 30 enhances the structural strength of the battery device 200. Since the battery cell assembly 300 at the end along the second direction N is close to the beam 202 of the housing 20, it can be supported more stably, reducing the vibration of the battery cell assembly 300. Correspondingly, the battery cell assembly 300 is connected to the adjacent battery cell assembly 300 using the second pressure strip 42, which simplifies the structure. Furthermore, by using the combination of the first pressure strip 41 and the second pressure strip 42, the cost is reduced while lowering the risk of connection failure between the battery cell assembly 300 and the pressure strip 40.

[0206] According to some embodiments of this application, this application also provides an electrical device, including a battery device 200 as described in the above embodiments, the battery device 200 being used to store or provide electrical energy.

[0207] 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: The container has storage space; Multiple battery cell assemblies, each of the battery cell assemblies including multiple battery cells arranged along a first direction, the multiple battery cell assemblies being arranged in the receiving space along a second direction, and the top surface of each battery cell assembly having shoulders at both ends along the second direction; A strip connects two adjacent shoulders; Along the second direction, any two adjacent shoulder sections are connected by the pressure strip; each battery cell has a protruding structure at the position corresponding to the shoulder section, and the protruding structure is fixedly connected to the corresponding pressure strip; The pressure strip includes a first pressure strip, which includes a middle portion and connecting portions connected to both sides of the middle portion along the second direction; along the second direction, the middle portion is located in the region between two corresponding protruding structures, and the connecting portions are fixedly connected to the corresponding protruding structures; at least a portion of the middle portion protrudes from the side of the connecting portions toward the battery cell.

2. The battery device as claimed in claim 1, characterized in that, Along the second direction, and within the same battery cell, the top surface of the battery cell forms a sub-region on the side of each of the protrusions facing away from the other protrusion; multiple sub-regions along the same side of the second direction in the battery cell assembly constitute a sub-region; the middle portion has a connecting surface facing the battery cell, and the connecting surface is bonded and fixed to the corresponding two sub-regions.

3. The battery device as claimed in claim 2, characterized in that, The intermediate portion includes a first portion, the thickness of which is greater than the thickness of the connecting portion.

4. The battery device as claimed in claim 3, characterized in that, The top surface of the first part is flush with the top surface of the connecting part.

5. The battery device as claimed in claim 3, characterized in that, The middle part includes a second part, which includes a first segment and a second segment extending from the first segment along both sides of the second direction in a direction away from the battery cell. The second segments on both sides of the first segment are respectively connected to the two connecting parts, and the connecting surface is provided on the first segment.

6. The battery device as described in any one of claims 1-2, characterized in that, The middle part includes a third part, which is curved in an arc shape, and the two sides of the third part are respectively connected to the two connecting parts.

7. The battery device as claimed in any one of claims 1-2, characterized in that, The pressure strip includes a second pressure strip, which is in the shape of a flat strip.

8. The battery device as claimed in claim 7, characterized in that, When there are three or more battery cell assemblies, two adjacent battery cell assemblies located at one end along the second direction are connected by the second pressure strip, and the second pressure strip connects the protruding structure of the corresponding two battery cell assemblies, and the remaining pressure strips are the first pressure strips.

9. The battery device as claimed in claim 8, characterized in that, When there are four or more battery cell assemblies, two adjacent battery cell assemblies at each end along the second direction are connected by the second pressure strip, and the second pressure strip connects the protruding structure of the corresponding two battery cell assemblies, and the remaining pressure strips are the first pressure strips.

10. The battery device as claimed in claim 8, characterized in that, The intermediate portion includes a first portion, the thickness of which is greater than the thickness of the connecting portion, and the top surface of the first portion is flush with the top surface of the connecting portion.

11. The battery device according to any one of claims 1-5, characterized in that, Each of the battery cells has two electrode terminals spaced apart on its top surface along the second direction, and the protrusion structure is provided on the side of each electrode terminal facing away from the other electrode terminal on the top surface of the battery cell.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-11, the battery device being used to store or provide electrical energy.

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